CN109984796B

CN109984796B - Firing equipment

Info

Publication number: CN109984796B
Application number: CN201711473925.8A
Authority: CN
Inventors: 陈望东; 丁水澄
Original assignee: Suzhou Tianchen International Medical Technology Co Ltd
Current assignee: Suzhou Tianchen International Medical Technology Co Ltd
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2023-09-08
Anticipated expiration: 2037-12-29
Also published as: CN109984796A

Abstract

The invention discloses firing equipment which comprises a base frame, a first moving part, an operating part, a second moving part, a supporting rod, a blocking mechanism and a limiting mechanism. The limiting mechanism does not act on the blocking mechanism, and the first hinged fulcrum forms a fulcrum of the operating part; when the limiting mechanism acts on the blocking mechanism, the second hinged supporting point forms a supporting point of the operating component to switch the rotating supporting point of the operating component, so that the second moving component is switched from a moving state to a fixed state, and the firing equipment is in a triggerable state; in the failure state, even if an operator applies an acting force to the operation part, the firing phenomenon can not occur, so that the firing equipment is safeguarded.

Description

Firing equipment

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to firing equipment.

Background

The anastomat is used in medicine to replace traditional manual suturing equipment, and the anastomat used clinically at present has the advantages of quick suturing, simple and convenient operation, few side effects, surgical complications and the like, and is favored and appreciated by clinicians at home and abroad.

The anastomat is divided into a circular tube type anastomat, a linear type stapler, a cavity mirror anastomat and the like according to functions and structures, wherein the circular tube type anastomat is used for anastomosis of various cavity passages, two layers of cavity passage tissues are sutured together by striking staples into the cavity passage tissues, and meanwhile, an internally-arranged annular knife cuts off redundant tissues to form a circular anastomotic stoma, so that anastomosis of the cavity passages is completed. The method is mainly applied to anastomosis of the digestive tracts such as esophagus, stomach, intestine and the like and anastomosis operation after circumcision and hemorrhoid circular cutting at present.

In order to prevent the occurrence of false firing phenomenon of the anastomat during surgery, a safety device is provided in the existing anastomat, for example, an anastomat disclosed in chinese patent document CN1785127a, the anastomat comprises a housing, a staple pushing rod, a screw rod, a handle, a binding head, an indication window, a knob and a safety device. For convenience in description, one end close to an operator is expressed as a proximal end, one end correspondingly far away from the operator is expressed as a distal end, an indication window is formed in the shell, and a cockable position range and an unfired position range of the stapler are displayed in the indication window; one end of the handle is hinged with the shell and is abutted against the proximal end of the nail pushing rod; the screw rod is slidably arranged in the shell, the screw rod penetrates through the nail pushing rod, two ends of the screw rod are respectively leaked outside the presumption rod, a knob is arranged on the proximal end of the screw rod, and a binding head is arranged on the distal end of the screw rod. The safety device comprises a safety rod and a pull piece. One end of the bumper is abutted against the lug of the handle, and the other end of the bumper is provided with a pointer which points to the position in the indication window; the proximal end of the pull tab is sleeved on the screw rod, and the distal end is hooked on the bumper.

When the anastomat is used, the pointer starts to point to the range of the unfired position, an operator rotates the knob to drive the screw rod to slide towards one side of the proximal end of the screw rod, the pull piece slides along with the screw rod, the distal end of the pull piece can stir the safety rod to rotate on the shell, one end of the safety rod, which is propped against the convex block, is separated from the convex block, and the limitation on the handle is released; when the operator rotates the knob and continuously observes the pointing position of the pointer in the indication window, after the medical staff observes that the pointer moves from the unfired position to the unfired position range, the operator can push the handle, and the handle drives the nail pushing rod to extend distally, so that the firing process is realized.

However, in the safety device of the anastomat, an operator judges whether the anastomat is in a position range which can be fired by observing the pointing position of the pointer in the indication window in operation, but because of more interference factors in the operation process and the deviation of the sight angle of the operator, misjudgment of doctors can be caused, the handles are pressed for reaching the position which can be fired, at the moment, one end of the safety rod still abuts against the bump of the handles in the position range which can be fired, the limit effect is achieved on the handles, and if the operator presses the handles with larger acting force, the shell of the anastomat and the internal structure of the anastomat can be damaged.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is that in the anastomat in the prior art, an operator easily misjudges the position which can be fired to press the handle, and the anastomat device is easily damaged.

To this end, the invention provides a firing apparatus comprising

A base frame;

a first moving member slidably disposed between a start position and an action position with respect to the base frame;

an operating member having one end hinged to the first moving member, a first hinge point being formed on the first moving member, the operating member having a rotation fulcrum that applies a force to the first moving member toward the acting position;

A second moving part which is arranged in a conversion way between a moving state and a fixed state relative to the base frame;

the two ends of the supporting rod are respectively hinged to the operating part and the second moving part, and a second hinge point is formed on the second moving part;

a blocking mechanism movably disposed on the second moving member;

the limiting mechanism is movably arranged relative to the base frame; the limiting mechanism does not act on the blocking mechanism, and the first hinge fulcrum forms a fulcrum of the operating part; when the limiting mechanism acts on the blocking mechanism, the second hinge pivot constitutes a pivot of the operating component.

Preferably, in the above firing device, a limiting area is formed on the second moving part;

in the moving state, the blocking mechanism is positioned between the limit area and the blocking mechanism; in the fixed state, the limiting mechanism is blocked in the limiting area by the blocking mechanism.

Further preferably, the above-mentioned firing device, the limiting mechanism comprises

The first reset piece is sleeved on the first moving part and is used for applying a first biasing force to the first moving part towards one side of the second moving part;

The limiting piece is slidably arranged between a first position and a second position relative to the base frame; in the second position, the blocking mechanism acts on the limiting piece, and the limiting piece is inserted into the limiting area.

Further preferably, in the firing device, the limiting area is a limiting channel formed on one end of the second moving part and extending along the sliding direction of the limiting part, and an opening of the limiting channel faces one side of the first moving part;

the blocking mechanism comprises

The blocking piece is sleeved on the second moving part; a first channel which is in the same direction as the limit channel is formed on the inner wall surface of at least one side of the blocking piece, and two side walls correspondingly forming the first channel are first bulges; the first bulge faces one side end surface of the first moving part and is provided with a first guide surface which is inclined from outside to inside, and one side end surface of the first bulge, which faces away from the first moving part, is in the fixed state and is blocked at the opening of the limiting channel;

a reset assembly disposed between the second moving member and the blocking member for applying a second biasing force to the blocking member;

the limiting piece moves towards the second position, and the limiting piece faces the first guide surface and is propped against the first guide surface; the direction of the pressing force of the limiting piece to the first guide surface is opposite to the direction of the second biasing force.

Further preferably, the firing device described above, the reset assembly includes a second reset member disposed between the stop and the second moving member.

Still preferably, in the firing device, one end of the blocking member in the sliding direction is an open port, and two side walls of the blocking member forming the open port are respectively provided with a bar-shaped hole extending in the sliding direction;

the resetting assembly further comprises positioning blocks which are inserted into the two strip-shaped holes; two ends of the second reset piece are respectively arranged between the positioning block and the second moving part.

Preferably, in the above firing device, at least one guiding chute extending along the sliding direction of the blocking member is formed on two side walls of the outer periphery of the second moving member, and the guiding chute is communicated with the limiting channel;

at least one first bulge is embedded in the guide sliding groove in a one-to-one correspondence manner, and two side walls of the first bulge are abutted against the inner wall surface of the guide sliding groove along the sliding direction of the limiting piece.

Preferably, in the above firing device, the limiting mechanism further includes a third moving component slidably disposed between a first position and a second position relative to the base frame;

The limiting piece is arranged on the third moving part; the second moving part is sleeved outside the third moving part.

Further preferably, the firing device further includes a third reset element disposed on the base frame and abutting against the second moving member; the third reset piece applies a third biasing force to the second moving part towards one side of the limiting piece, and the third biasing force is smaller than the first biasing force.

Preferably, the firing device further comprises a secondary firing preventing device for switching the second moving part from the fixed state to the moving state when the first moving part is reset from the acting position to the starting position.

Further preferably, the firing equipment comprises a secondary firing prevention device

The linkage part is movably arranged between a third position and a fourth position relative to the base frame; the linkage part is matched with the blocking mechanism, and two ends of the linkage part are respectively in linkage arrangement with the first moving part and the second moving part;

in the fourth position, the linkage part drives the limiting piece to be separated from the limiting area; and the limiting piece slides towards the first position, and the limiting piece stirs the linkage part to reset to the third position.

Further preferably, in the firing device, a protrusion protruding along the sliding direction of the blocking member is provided on an inner wall surface of the blocking member;

the linkage part is arranged in the blocking part in a penetrating way, a concave part is formed in the outer wall surface of the linkage part, which faces the protruding part, a convex part is correspondingly formed at least on one side of the concave part, which is close to the first moving part, and the concave part is in transitional connection with the convex part through an inclined second guide surface;

in the third position, the recess is in abutment with the projection; in the fourth position, the boss abuts the protrusion.

Preferably, in the above firing device, in the third position, one end of the linkage member is overlapped on one end of the first moving member; in the active position, the end face of the one end of the linkage member is disengaged from the end face of the one end of the first moving member.

Further preferably, in the above firing device, the secondary firing preventing device further includes a force receiving member disposed on an outer side wall surface of the linkage member and located between the blocking mechanism and the first moving member;

The limiting piece moves towards the first position, and the force-bearing piece is shifted to enable the linkage part to reset to the third position.

More preferably, in the above firing device, the secondary firing preventing device further includes a fourth reset element, disposed on the second moving component and abutting against the other end of the linkage component;

the fourth restoring member applies a fourth biasing force to the linkage member toward the third position.

The technical scheme of the invention has the following advantages:

1. the invention provides firing equipment which comprises a base frame, a first moving part, an operating part, a second moving part, a supporting rod, a blocking mechanism and a limiting mechanism. The limiting mechanism does not act on the blocking mechanism, and the first hinged fulcrum forms a fulcrum of the operating part; when the limiting mechanism acts on the blocking mechanism, the second hinged supporting point forms a supporting point of the operating component to switch the rotating supporting point of the operating component, so that the second moving component is switched from a moving state to a fixed state, and the firing equipment is in a triggerable state; in the failure state, even if an operator applies an acting force to the operation part, the firing phenomenon can not occur, so that the firing equipment is safeguarded.

2. According to the firing equipment provided by the invention, in the actual use process of the firing equipment, the secondary firing prevention device is arranged to convert the second moving part from the fixed state to the moving state, and correspondingly, the firing equipment is converted from the triggerable state to the invalid state, so that the second moving part is converted between the fixed state and the moving state, the firing equipment is ensured to be fired only once, the firing equipment is not continuously and again fired even if the operating part acts, but is in the invalid state again, and the firing equipment is alternately switched between the triggerable state and the invalid state.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic longitudinal cross-sectional view of a firing apparatus of the present invention;

FIG. 2 is an enlarged view of a portion of the firing device of FIG. 1;

FIG. 3 is a schematic view of the firing apparatus of FIG. 1;

FIG. 4 is an enlarged view of a portion of the firing device of FIG. 3;

FIG. 5 is a schematic view of the second moving part of FIG. 1;

FIG. 6 is a schematic view of the structure of the barrier of FIG. 1;

FIG. 7 is a schematic view of the positioning block in FIG. 1;

fig. 8 is a schematic structural view of the linkage member in fig. 1.

Reference numerals illustrate:

1-a base frame;

2-a first moving part, 21-a first limiting part, 22-a second limiting part and 23-a first baffle;

3-an operating member, 31-a first hinge point; 32-a third hinge point;

4-second moving parts, 41-limiting channels, 42-guiding sliding grooves and 43-fourth limiting parts; 44-guide projections; 45-a supporting part;

5-supporting rod, 51-second hinging point;

61-blocking piece 611-first channel, 612-first protrusion, 613-first guide surface, 614-bar hole, 615-arc portion, 616-vertical portion, 617-protruding portion, 620-abutment surface; 621-a second resetting piece, 622-a positioning block, 6221-a body, 6222-a connecting column, 6223-a connecting block, 6224-a clamping groove and 63-an annular limiting part;

71-a first reset piece and 72-a limiting piece;

8-a third moving part;

9-a third reset piece and 91-a third limiting part;

101-a linkage part, 1011-a concave part, 1012-a convex part, 1013-a second guide surface, 102-a stress piece, 1021-a third guide surface and 103-a fourth reset piece;

11-a driving member;

12-a cartridge module;

13-anvil assembly.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Example 1

The present embodiment provides a firing apparatus, as shown in fig. 1 to 8, including a first moving member 2, an operating member 3, a second moving member 4, a strut 5, a limiting mechanism, and a blocking mechanism.

Wherein the first moving part 2 is slidably arranged between a starting position and an active position relative to the base frame 1. One end of the operating member 3 is hinged to the first moving member 2, a first hinge point 31 is formed on the first moving member 2, and the operating member 3 has a pivot point for applying a force to the first moving member 2 toward the acting position; both ends of the supporting rod 5 are respectively hinged on the operating part 3 and the second moving part 4, a second hinge point 51 is formed on the second moving part 4, and a third hinge point 32 is formed between the supporting rod 5 and the operating part 3.

A blocking mechanism comprising a blocking member 61 and a reset assembly; the blocking mechanism is movably arranged on the second moving part 4; the limiting mechanism comprises a first reset piece 71 and a limiting piece 72, and is movably arranged relative to the base frame 1. When the limiting mechanism acts on the blocking mechanism, the second hinge point 51 forms a pivot for the rotation of the operating component 3, the second moving component 4 is in a fixed state, and the firing equipment is in a triggerable state; when the limiting mechanism does not act on the blocking mechanism, the first hinge point 31 forms a pivot point for the rotation of the operating component 3, and the second moving component 4 is in a moving state, and the firing equipment is in an unfired failure state.

In the firing device of the present embodiment, the first moving member 2 and the second moving member 4 are connected to the operating member 3 in an articulated manner, so that the operating member 3 has two articulated points, one articulated point being located at a position corresponding to the first articulated point 31 at the distal end of the operating member 3, and the other articulated point being a third articulated point 32 located at the proximal end of the operating member 3 with respect to the first articulated point 31. The third hinge point 32 is hinged to the distal end of the strut 5 and the hinge point at the distal end of the operating element 3 is hinged to the first hinge point 31 of the first moving element 2. When the first moving part 2 is switched from the starting position into the active position, the second moving part 4 is correspondingly switched from the moving state into the fixed state. Specifically, by switching the first hinge point 31 of the operating member 3 and the second hinge point 51 of the second moving member 4, that is, one hinge point of the first hinge point 31 and the second hinge point 51, which is relatively fixed, is used as a rotation pivot of the operating member 3, so as to switch the firing device between a failure state and a triggerable state; in the failure state, even if the operator applies a force to the operation member 3, the firing phenomenon does not occur, thereby securing the firing device.

In the following, a stapler is taken as an example to describe in detail the process of switching the firing device from the failure state to the fixed state and implementing firing in this embodiment. For convenience of description of the positional relationship of the respective components, the end close to the operator is named as a proximal end, and the end far from the operator is named as a distal end.

The operating member 3 is preferably a handle, the first moving member 2 is a push rod, and the base frame 1 is preferably a housing. As shown in fig. 1, a first limiting portion 21 and a second limiting portion 22 are disposed on an inner wall surface of the housing, the second limiting portion 22 is located at a proximal end of the first limiting portion 21, for example, the second limiting portion 22 is an annular plate, a first baffle 23 is disposed on an outer wall surface of the proximal end of the first moving member 2, and in a starting position, the first baffle 23 abuts against the second limiting portion 22. The first restoring member 71 is sleeved on the first moving part 2, and has a distal end abutting against the first limiting portion 21, and a proximal end abutting against the first baffle 23.

As shown in fig. 1, 2 and 3, the firing apparatus further includes a third moving member 8, a cartridge module 12 and an anvil module 13. The third movement member 8 is for example a screw, and the proximal end of the third movement member 8 is provided with a drive element 11, the distal end of which extends distally through the second movement member 4. For example, the driving member 11 is a knob which is threadedly engaged with the proximal end of the lead screw, and the operator drives the lead screw to extend in the distal direction or retract in the proximal direction by rotating the knob in different directions. The anvil assembly 13 includes an anvil head and an anvil rod positioned within the interior cavity of the anvil head and connectable to the distal end of the second moving member 4. For example, the anvil head has a conical shape.

As shown in fig. 1, the nail cartridge assembly 12 comprises a cartridge body fixed on the distal end of the base frame 1, and a nail pushing sheet positioned in the cartridge body; the nail bin is arranged in the cylinder body along the axial direction of the cylinder body; and a plurality of staples are arranged in the circumferential direction of the staple cartridge. The proximal end of the first moving part 2 is hinged to the operating part 3, the distal end of which abuts against the proximal end of the ejector blade and can drive the ejector blade to move distally.

The switching of the rotation pivot of the operation member 3 is realized by the action of the stopper mechanism. The second moving part 4 is preferably a support, the second moving part 4 is sleeved on the third moving part 8, and a limiting area is formed on the second moving part 4.

As shown in fig. 5, the limiting area is a limiting channel 41 formed on the distal end of the second moving member 4 and extending along the sliding direction of a limiting member 72 (mentioned below), and the distal end of the limiting channel 41 extends to the distal end face of the second moving member 4, that is, the distal end of the limiting channel 41 is open, for example, the limiting channel 41 is a long waist hole with an opening.

As shown in fig. 2, the stopper mechanism includes a first restoring member 71 and a stopper 72. For example, the first restoring member 71 is a compression spring, an elastic sheet, or an elastic member having elastic deformation such as a torsion spring, wherein the first restoring member 71 is sleeved on the first moving member 2, and the proximal end and the distal end of the first restoring member 71 respectively abut against the first baffle 23 and the first limiting portion 21, so as to apply a first biasing force to the first moving member 2 toward the second moving member 4.

The limiting member 72 is slidably disposed between a first position and a second position relative to the base frame 1, for example, the limiting member 72 is a pin shaft penetrating through the third moving member 8, and correspondingly, the third moving member 8 is slidably disposed between the first position and the second position relative to the base frame 1. In the first position, the limiting piece 72 is located between the proximal end of the first moving part 2 and the distal end of the second moving part 4, and the limiting piece 72 may be located outside the second moving part 4 and has no locking effect on the second moving part 4, and the second moving part 4 is in a moving state, so that the device is not cockable; in the second position, the limiting piece 72 passes through the blocking mechanism and then enters the limiting channel 41, and is limited in the limiting channel 41 by the blocking mechanism, so that the limiting piece 72 is inserted into the limiting channel 41, namely, the second moving part 4 is locked on the third moving part 8 through the blocking mechanism acting on the limiting mechanism, correspondingly, the second moving part 4 is in a fixed state, and at the moment, the device can be fired.

As shown in fig. 3, 4 and 6, the blocking mechanism includes a blocking member 61 and a reset assembly. Specifically, the blocking member 61 is a substantially "U" shaped ring, and the blocking member 61 is fitted over the distal end of the second moving member 4; the blocking member 61 is provided with a first channel 611 along the axial direction thereof, which is in the same direction and is adapted to the limiting channel 41, and two side walls of the first channel 611 are correspondingly formed to form a first protrusion 612; the distal end surface of the first protrusion 612 is provided with a first guiding surface 613 that is inclined from outside to inside, and the opposite side surface of the first protrusion 612 is a supporting surface 620, and the supporting surface 620 acts on the limiting member 72 in the fixed state.

As shown in fig. 2 and 7, the reset assembly includes a second reset element 621 and a positioning block 622. The U-shaped side wall of the blocking member 61 is provided with a vertical portion 616, the vertical portion 616 is provided with a bar-shaped hole 614, and the positioning block 622 is arranged through the bar-shaped hole 614. The second restoring member 621 is disposed between the positioning block 622 and the second moving member 4 in the radial direction, and applies a second biasing force to the blocking member 61 so that the blocking member 61 is restored without an external driving force. When the knob is rotated to drive the limiting member 72 to move towards the second position, the limiting member 72 is firstly continuously close to the blocking member 61, then two ends of the limiting member 72 are respectively opposite to one first guide surface 613 and act on the corresponding first guide surface 613, and at this time, the blocking member 61 moves towards the axis center due to the acting force of the limiting member 72; eventually, as the stop member 72 moves further proximally, eventually past the first tab 612, the stop member 61 is reset by the second reset member 621. The direction of the pressing force of the limiting member 72 against the first guide surface 613 is opposite to the direction of the second biasing force. For example, the second restoring member 621 is a compression spring, and the second restoring and operating members 3 are respectively located on both sides of the third moving member 8.

For the specific matching relationship between the blocking member 61 and the limiting member 72, as shown in fig. 6 and 7, in the sliding direction of the blocking member 61, one end of the blocking member 61 is an open port, and two side walls forming the open port on the blocking member 61 are respectively provided with a bar-shaped hole 614 extending along the sliding direction of the blocking member 61. The reset assembly further comprises a positioning block 622 inserted into the two strip-shaped holes 614, and two ends of the second reset piece 621 are respectively arranged between the positioning block 622 and the second moving part 4. More specifically, the blocking member 61 includes an arc portion 615 fitted over the second moving member 4 and having the above-mentioned opening, and vertical portions 616 formed at both ends of the opening of the arc portion 615, the first passage 611 is formed on the inner wall surface of the arc portion 615, and the bar-shaped hole 614 is opened on the vertical portions 616. As shown in fig. 7, the positioning block 622 includes a body 6221, a connecting column 6222 mounted on the body, two ends of the body are formed with a connecting block 6223, two clamping grooves 6224 are formed on the connecting block 6223, and when two ends of the positioning block are mounted in two bar-shaped holes 614, the two clamping grooves 6224 on the positioning block 622 are respectively matched with the two bar-shaped holes 614; the second restoring member 621 is fitted over the connecting post 6222, and the positioning block 622 moves with the blocking member 61 in the elongated hole 614 when the blocking member 61 slides on the second moving member 4.

As shown in fig. 5, the two side walls of the outer periphery of the second moving part 4 are also provided with guide sliding grooves 42, and the guide sliding grooves 42 are arranged perpendicular to the axial direction. The distal end of the second moving member 4 is provided with an annular limiting portion 63, the guide chute 42 is located at two sides of the limiting channel 41, and the distal end extends to the annular limiting portion 63, when the first protrusion 612 of the blocking member 61 is embedded in the guide chute 42, the distal end of the blocking member 61 is blocked and limited by the proximal end of the annular limiting portion 63, so as to further ensure the reliability of the movement of the blocking member 61. The first protrusions 612 on the two sides of the first channel 611 on the blocking piece 61 are embedded in the guide chute 42 in a one-to-one correspondence manner, and two side walls of the first protrusions 612 are abutted against the inner wall surface of the guide chute 42 along the sliding direction of the limiting piece 72. Preferably, the contact surfaces of the first protrusion 612 of the blocking member 61 and the guiding chute 42 are parallel to each other, so as to obtain a smoother acting force. The guiding chute 42 is arranged to facilitate the installation and positioning of the blocking member 61 on the second moving member 4, and simultaneously limit the movement of the blocking member 61 to the radial direction of the second moving member 4, and since the two side walls of the first protrusion 612 are limited by the two inner wall surfaces of the guiding chute 42, the blocking member 61 has no movement component in the axial direction of the second moving member 4.

As shown in fig. 5, the outer wall surface of the second moving member 4 is provided with a guide projection 44 extending in the axial direction thereof, and correspondingly, the inner wall surface of the housing is provided with a long-strip-shaped guide chute extending in the axial direction of the second moving member 4, the guide projection 44 is embedded in the guide chute, and when the second moving member 4 slides, the guide projection 44 slides in the guide chute, thereby guiding the sliding of the second moving member 4.

As shown in fig. 1, the firing device further includes a third restoring member 9, such as a compression spring, where the third restoring member 9 is sleeved on the third moving member 8. A third limiting part 91 is also arranged on the inner wall surface of the proximal end of the shell, and a supporting part 45 is arranged at the proximal end of the second moving part 4; the proximal and distal ends of the third restoring member 9 abut against the third stopper 91 and the proximal abutment 45 of the second moving member 4, respectively. For example, the proximal end of the second moving member is provided with an annular step surface against which the distal end of the third restoring member abuts. The third restoring member 9 applies a third biasing force to the second moving member 4 in the direction toward the first moving member 2, the third biasing force being smaller than the first biasing force.

Since the third biasing force is smaller than the first biasing force, in the failure state, the operating member 3 takes the first hinge point 31 as a pivot point; when the operation member 3 is held, the second movement member 4 slides proximally; the operating member 3 is released, and the second moving member 4 moves in the distal direction under the third biasing force, so that the second moving member 4 automatically returns to the initial position, and the second moving member 4 is locked in preparation for the subsequent engagement of the stopper 72 with the stopper 61, so that the pivot point of the operating member 3 can be easily shifted from the first hinge point 31 to the second hinge point 51. In summary, in the failure state: the first hinge point 31 is made to be a pivot point of the operating member 3 by the first biasing force of the first return member 71. The stopper 72 is located at a first position between the proximal end of the first moving member 2 and the distal end of the second moving member 4, at which time even if the operating member 3 is pressed, the operating member 3 cannot drive the first moving member 2 to move in the distal direction, failing to realize the firing process; but the second moving part 4 is driven to slide back and forth in the axial direction of the third moving part 8, so that the shell and the internal structure of the firing equipment are not damaged even if a large driving force is applied to the operating part 3, and the firing equipment is protected. In use, when the firing device is to be fired, an operator is required to operate a knob, such as rotating the knob counterclockwise, so that the third moving member 8 is retracted proximally from the distal end, and the anvil assembly 13 moves proximally with the third moving member 8 toward the distal end adjacent the cartridge assembly 12; at this time, the limiting piece 72 gradually approaches to the opening of the blocking piece 61 on the second moving part 4 from the first position, then two ends of the limiting piece 72 respectively face against the first guide surfaces 613 of the two first protrusions 612, when the limiting piece 72 continues to slide towards the second position, two ends of the limiting piece 72 respectively generate a pressing force to one first guide surface 613, and the pressing force is opposite to the direction of the second biasing force, so as to drive the second moving part 4 to move towards one side of the operating part 3, so that the blocking piece 61 does not block the opening of the limiting channel 41 any more, and two ends of the limiting piece 72 sequentially pass through the first guide surfaces 613 and the protruding part 617 and enter the limiting channel 41; when the stopper 72 enters the stopper passage 41, the first guide surface 613 and the protruding portion 617 are not pressed by the two ends of the stopper 72, the stopper 61 is restored to its original position by the second biasing force, the stopper 72 again blocks the opening of the stopper passage 41, and the stopper 72 is restricted in the stopper passage 41 by the stopper 61, so that the movement of the second moving member 4 in the axial direction of the third moving member 8 is restricted.

At this time, the limiting force of the limiting piece 72 on the second moving part 4 is larger than the first biasing force of the first reset piece 71, so that the rotating fulcrum of the operating part 3 is converted from the first hinging point 31 to the second hinging point 51, correspondingly, the limiting piece 72 is in the second position, the second moving part 4 is converted from the moving state to the fixed state, the firing equipment is converted from the invalid state to the triggerable state, the distance between the proximal end of the anvil assembly 13 and the distal end of the staple cartridge assembly 12 just reaches the preset value, at this time, the operating knob is stopped, an operator only needs to press the operating part 3, the operating part 3 can drive the proximal end of the first moving part 2 to extend towards the distal direction, the staples in the staple cartridge are pushed to move towards the anvil assembly 13, and simultaneously the first reset piece 71 is compressed, the first moving part 2 moves from the starting position to the acting position, and the two parts between the anvil assembly 13 and the staple cartridge assembly 12 are stitched, and the whole firing process is completed; when the operator releases the operating member 3, the first moving member 2 is returned from the acting position to its home position by the first biasing force of the first return member 71.

The above arrangement of the second resetting piece 621 also makes the blocking piece 61 tightly abut against the first guiding surface 613 and the limiting piece 72 under the action of the second biasing force, so as to ensure that the limiting piece 72 slides into the limiting area along the first guiding surface 613 through the blocking piece 61, and further ensure the reliability of the firing equipment.

When the firing equipment is in an initial state, the first reset piece 71 acts on the first moving part 2, so that the proximal end of the first moving part 2 is abutted against the second limiting part 22; at the same time, the proximal end of the second moving member is in a fixed position due to the action of the third restoring member 9. Since the operating member 3 is distally connected to said first moving member 2 by means of a first hinge point 31; connected at a proximal end to said second moving part 4 by a second hinge point 51; thus, in the initial state, the operating member 3 can maintain a stable opening angle by the first hinge point 31 and the second pivot point 51.

In addition, it should be noted that, when the limiting member 72 slides into the limiting channel 41 and is blocked in the limiting channel 41 by the blocking member 61, a limiting space enclosed between the proximal end abutting surface 620 of the blocking member 61 and the proximal end of the limiting channel 41 is along the axial direction of the third moving member, and the length of the limiting space is not less than the radial length of the limiting member 72, so that the third moving member 8 can also slide slightly along the axial direction thereof in the limiting space when the limiting member 72 is limited in the limiting channel 41, thereby realizing the fine adjustment of the distance between the anvil assembly and the staple cartridge, and adapting the distance to the stapling function of tissues with different thicknesses.

In the actual use process of the firing equipment, such as a anastomat used in an operation, the firing equipment is usually only required to fire once, and the firing equipment is not required to fire twice or more times continuously. Thus, the firing apparatus in this embodiment further includes a secondary firing preventing means for switching the second moving member 4 from the fixed state to the moving state when the first moving member 2 is reset from the acting position to the starting position. The secondary firing prevention device converts the second moving part 4 from a fixed state to a moving state, and correspondingly, the firing equipment is converted from a triggerable state to a failure state, so that the second moving part 4 is converted between the fixed state and the moving state, the firing equipment is ensured to be fired for only one time, and the subsequent firing equipment is in the failure state even when the operating part 3 acts.

As shown in fig. 2 to 4, the secondary firing preventing device includes a linkage member 101 movably disposed between a third position and a fourth position with respect to the base frame 1. For example, the interlocking member 101 is an interlocking block, the interlocking member 101 is fitted to the stopper 61, and both ends thereof are provided in interlocking with the first moving member 2 and the second moving member 4, respectively.

The third position described above corresponds to the starting position of the first moving member 2; when the limiting member 72 slides towards the first position, the limiting member 72 resets the toggle linkage 101 to the third position, thereby enabling the second moving member 4 to be transitioned from the cockable state to the disabled state.

Specifically, as shown in fig. 4, 5, 6, and 8, the linking member 101 has a constant elasticity. The linkage member 101 is arranged on the blocking piece 61 in a penetrating way, and a protruding part 617 protruding along the sliding direction of the inner wall surface of the blocking piece 61 is arranged on the inner wall surface of the blocking piece 61; the outer wall surface of the linkage member 101 facing the protrusion 617 is provided with a concave portion 1011, a protrusion 1012 is formed on one side of the linkage member 101 close to the first moving member 2, the linkage member 101 and the protrusion are in transitional connection through an inclined second guiding surface 1013, and the second guiding surface 1013 is inclined towards the distal direction. For example, projection 617 may be a hemisphere centered on the "U" shaped base and facing the open mouth of stop 61, and recess 1011 may be an arcuate recess.

As shown in fig. 4, in the third position, the proximal end of the linkage member 101 is slidably disposed on the second moving member 4, and the distal end of the linkage member 101 overlaps the proximal end of the first moving member 2; in the fourth position, the end face of the distal end of the linkage member 101 abuts against the end face of the proximal end of the first moving member 2. The starting of the firing device is in a failure state, when the operating member 3 is held, the limiting member 72 slides from the first position to the proximal limiting region, the linkage member 101 is kept at the third position all the time, and even if the second moving member 4 slides towards the proximal end or the distal end, the proximal end of the linkage member 101 is still in sliding fit on the second moving member 4, and the concave portion 1011 on the linkage member 101 abuts against the protruding portion 617 on the blocking member 61; that is, the linkage member 101 remains in the third position throughout the transition from the initial fail state to the cocked state.

When the limiting piece 72 passes through the blocking piece 61 and is inserted into the limiting channel 41, and the firing equipment is in a firing state, the operating part 3 is pressed to push the first moving part 2 to slide distally, and the first moving part 2 moves from the initial position to the action position to complete the firing process; when the firing is completed, the distal end of the linkage part 101 falls off from the proximal end of the first moving part 2, and the distal end of the linkage part 101 deflects towards the axial direction under the action of self elastic force, and at the moment, the end face of the distal end of the linkage part 101 is separated from and opposite to the end face of the proximal end of the first moving part 2, and the distance between the end face of the distal end of the linkage part 101 and the end face of the proximal end of the first moving part 2 is smaller than the distance between the starting position and the acting position of the first moving part; when the operating member 3 is released, the first moving member 2 is moved in the proximal direction to be reset by the first biasing force of the first reset element 71, and the end face of the proximal end of the first moving member 2 gradually approaches and abuts against the end face of the distal end of the linking member 101; the first moving part 2 drives the linkage part 101 to retract from the distal end to the proximal end, the second guiding surface 1013 on the linkage part 101 is abutted with the protruding part 617 on the blocking part 61, and an abutting force opposite to the second biasing force is generated on the protruding part 617 to drive the blocking part 61 to move towards the direction opposite to the second biasing force, namely, the blocking part 61 moves downwards in the illustrated direction to release the blocking effect on the opening of the limiting channel 41, at this time, even if the limiting part 72 is positioned in the limiting channel 41, the limiting part 72 does not have a locking effect on the second moving part 4, and when the operating part 3 is pressed, the second moving part 4 can slide towards the proximal end and compress the third reset part 9, so that the limiting part 72 is passively separated from the limiting channel 41, or the limiting part 72 can actively slide out from the limiting channel 41 by rotating a knob, so that the firing equipment is converted from a cockable state to a dead state, and even if the operating part 3 is pressed once, continuous secondary firing process cannot be realized.

However, in order to reset the linkage member 101 to the third position and realize the function of preventing secondary firing after the next firing, the knob needs to be operated clockwise, the third moving member 8 is moved to extend towards the distal end, the limiting member 72 and the anvil assembly 13 are driven to integrally extend towards the distal end, when the limiting member 72 slides towards the first position, the limiting member 72 drives the linkage member 101 to integrally move towards the distal end by stirring a force-receiving member 102 (mentioned below) on the linkage member 101, the concave portion 1011 of the linkage member 101 abuts against the protruding portion 617, and the distal end thereof is overlapped on the proximal end of the first moving member 2, so that the linkage member 101 is reset to the third position, and correspondingly the blocking member 61 is reset to block the opening of the limiting channel 41 under the second biasing force; in the resetting process of the linkage part 101, the firing equipment is in a failure state, so that the firing equipment is reset to an initial failure state; if the next firing is to be performed, the whole action process of the first firing needs to be repeated again, so that the repeated utilization of the firing equipment is realized.

As shown in fig. 2 and 8, the stress element 102 is an annular fin formed on the outer wall surface of the linkage block and located between the blocking element 61 and the first moving member 2, the end surface of the proximal end of the annular fin presents a third guiding surface 1021 inclined from the proximal end towards the distal end, when the limiting element 72 moves towards the first position, two ends of the limiting element 72 are opposite to the two third guiding surfaces of the annular fin, and the limiting element 72 abuts against the third guiding surfaces, so that the distal end of the linkage member 101 is overlapped on the proximal end of the first moving member 2 again, and the linkage member 101 is reset to the third position.

As shown in fig. 3, the secondary firing preventing device further includes a fourth reset element 103 sleeved on the second moving part 4 and abutting against the linkage part 101. A fourth limiting part 43 is arranged on the distal end of the second moving part 4; the fourth restoring member 103 is sleeved on the fourth limiting portion 43, the proximal end of the fourth restoring member abuts against the second moving member 4, and the distal end of the fourth restoring member abuts against the proximal end of the linkage member 101. When the linkage member 101 is in the fourth position, the fourth reset element 103 applies a fourth biasing force to the linkage member 101 in the distal direction, and the fourth biasing force drives the linkage member 101 to move integrally in the distal direction, so that the auxiliary limiting element 72 acts, and the in-place accuracy of the linkage member 101 in resetting the third position from the fourth position is further ensured.

In addition, in order to increase the deformation amount of the linkage member 101, an elongated hole is formed in the linkage member 101 to increase the deformation amount of the linkage member 101, or the linkage member 101 is made of an elastic material.

As a first alternative of embodiment, the guide chute 42 may be one, two, three, etc., and the specific number may be determined according to the actual requirements. Alternatively, the guide chute 42 may not be provided, and the stopper 61 may be attached to the second moving member 4 in the sliding direction intersecting the stopper 72.

As a second alternative implementation of the embodiment, the first reset element 71, the second reset element 621, the third reset element 9 and the fourth reset element 103 mentioned in the above embodiment may be in a natural state in the initial state, without generating a corresponding biasing force.

As a third alternative of embodiment, it is also possible to dispense with the third resetting element 9 and to manually press the operating element 3 in order to reset the second moving element 4 from the position in the displaced state to the starting position in the fixed state.

As a fourth alternative embodiment of the example, the driving member 11 may be a cylinder, or a motor, in addition to a knob, for driving the third movement member 8 in telescopic movement.

Example 2

The present embodiment provides a firing apparatus that differs from the structure of the firing apparatus provided in the embodiment only in that,

the force-bearing member 102 may also have other structures, for example, the force-bearing member 102 is a "U" shaped annular block formed on the outer wall surface of the linkage member 101, the end surface of the annular block is a horizontal plane from the distal end to the proximal end, meanwhile, the end surface of the limiting member 72 contacting the force-bearing member 102 is a fourth guiding surface, the fourth guiding surface abuts against the force-bearing member 102, and the force-bearing member 102 is shifted to raise the linkage member 101, so that the distal end of the linkage member 101 is overlapped on the proximal end of the first moving member 2 again.

As a first alternative embodiment of the embodiment, the secondary firing preventing device may not be provided with the fourth reset element 103, and the linkage member 101 may be reset to the third position only by the toggle action of the limiting element 72 on the force receiving element 102.

As a second alternative of the embodiment, no secondary firing prevention means may be provided in the firing apparatus.

Example 3

The present embodiment provides a firing device that differs from the structure provided in the embodiment only in that the cartridge module 12 and anvil head may be other shaped structures, the specific structure being determined by the environment of use, e.g., the housing and cartridge may be a tubular structure with a certain curvature, more suitable for extending into the interior of tubular tissue.

As a further alternative embodiment, the whole nail anvil is a bell structure, the opening of the bell structure is positioned at the far end and is suitable for being sleeved on the glans, and the firing equipment is a circumcision anastomat.

Example 4

the firing device may be other than an intraoperative stapler, such as a pistol, air gun, or toy pistol, among others. At this time, the third moving member 8, the anvil assembly 13, the cartridge assembly 12, the driver 11, and other special structures of the stapler may not be provided in the corresponding firing device.

The sliding of the stop 72 is driven by other means, such as a telescopic cylinder, arranged to drive the stop 72 to slide between the first and second positions.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims

1. A firing apparatus comprising

A base frame (1);

a first moving part (2) slidably arranged between a starting position and an active position with respect to the base frame (1);

an operating member (3) having one end hinged to the first moving member (2), a first hinge point (31) being formed on the first moving member (2), the operating member (3) being operable to apply a force to the first moving member (2) tending to the active position;

the method is characterized in that: and also comprises

A second moving member (4) which is provided so as to be switched between a moving state and a fixed state with respect to the base frame (1);

-a strut (5), the distal end of the strut (5) being hinged to the operating member (3), the proximal end being hinged to the second moving member (4) and forming a second hinge point (51) on the second moving member (4);

a blocking mechanism movably arranged on the second moving part (4);

the limiting mechanism is movably arranged relative to the base frame (1);

when the limiting mechanism does not act on the blocking mechanism, the first hinge point (31) forms a rotation pivot of the operating component (3); when the limiting mechanism acts on the blocking mechanism, the second hinge point (51) forms a rotation pivot of the operating component (3).

2. The firing device according to claim 1, characterized in that the second moving part (4) is provided with a limit area;

in the mobile state, the limit mechanism is located between the first moving part (2) and the second moving part (4); in the fixed state, the limiting mechanism is blocked in the limiting area by the blocking mechanism.

3. The firing apparatus of claim 2, wherein the limit mechanism comprises

A first reset piece (71) sleeved on the first moving part (2) and used for applying a first biasing force to the first moving part (2) towards one side of the second moving part (4);

A limiting piece (72) which is arranged in a sliding way between a first position and a second position relative to the base frame (1); in the second position, the blocking mechanism acts on the limiting piece (72), and the limiting piece (72) is inserted into the limiting area.

4. The firing device according to claim 3, characterized in that said limit zone is a limit channel (41) open at the distal end of said second moving part (4) and extending in the sliding direction of said limit element (72);

the blocking mechanism comprises

A blocking member (61) fitted over the second moving member (4); the barrier (61) comprises a first channel (611) and a first protrusion (612) forming the first channel (611) accordingly;

and a reset assembly arranged between the second moving part (4) and the blocking piece (61) for applying a second biasing force to the blocking piece.

5. The firing apparatus of claim 4, wherein the reset assembly comprises a second reset member (621) disposed between the stop member (61) and the second moving member (4).

6. The firing apparatus according to claim 5, characterized in that a vertical portion (616) is provided on a side wall of the blocking member (61), said vertical portion (616) being provided with a bar-shaped hole (614);

The reset assembly further comprises a positioning block (622) which is inserted into the strip-shaped hole (614); the second resetting piece (621) is arranged between the positioning block (622) and the second moving part (4).

7. Firing device according to claim 6, characterized in that said second moving part (4) is provided with at least one guiding chute (42) extending in the sliding direction of said blocking member (61), said guiding chute (42) being in communication with said limiting channel (41);

the first projections (612) are correspondingly inserted into the guide grooves (42).

8. Firing device according to claim 7, characterized in that said limit mechanism further comprises a third movement member (8) slidably arranged between a first position and a second position with respect to said base frame (1);

the limiting piece (72) is arranged on the third moving part (8).

9. Firing device according to any one of claims 3-8, further comprising a third reset element (9) arranged on the base frame (1) and abutting against the proximal end of the second moving part (4); the third restoring member (9) applies a third biasing force to the second moving member (4) toward the stopper (72) side, the third biasing force being smaller than the first biasing force.

10. Firing device according to any one of claims 4-8, further comprising anti-secondary firing means for switching the second moving part (4) from the fixed state to the moving state when the first moving part (2) is reset from the active position to the starting position.

11. The firing apparatus of claim 10, wherein the anti-secondary firing device comprises

A linkage member (101) movably disposed between a third position and a fourth position with respect to the base frame (1); the linkage part (101) is matched with the blocking mechanism, and two ends of the linkage part are respectively in linkage arrangement with the first moving part (2) and the second moving part (4);

in the fourth position, the linkage part (101) drives the limiting piece (72) to be separated from the limiting area; and the limiting piece (72) slides towards the first position, and the limiting piece stirs the linkage part (101) to reset to the third position.

12. The firing apparatus according to claim 11, wherein the inner wall surface of the barrier (61) is provided with a protrusion (617) protruding in the sliding direction thereof;

a concave part (1011) and a convex part (1012) are arranged on the outer wall surface of the linkage part (101) facing the protruding part (617), and the concave part (1011) and the convex part (1012) are in transitional connection through an inclined second guide surface (1013);

In the third position, the recess (1011) abuts the protrusion (617); in the fourth position, the boss (1012) abuts the protrusion (617).

13. The firing device according to claim 12, characterized in that in the third position, the distal end of the linkage member (101) overlaps the proximal end of the first moving member (2); in the active position, the distal end face of the linkage member (101) is disengaged from the proximal end face of the first moving member (2).

14. The firing apparatus of claim 13, wherein the secondary firing prevention device further comprises a force receiver (102) disposed on an outer sidewall surface of the linkage member (101);

the limiting piece (72) moves towards the first position, and the limiting piece drives the linkage component (101) to return to the third position by pulling the force-bearing piece (102).

15. The firing apparatus according to claim 14, wherein the anti-secondary firing device further comprises a fourth reset member (103) disposed on the second moving member (4) and abutting the proximal end of the linkage member (101);

the fourth reset element (103) applies a fourth biasing force to the linkage member (101) toward the third position.