CN212186538U - Mainframe box and ultrasonic imaging equipment - Google Patents

Abstract

The application discloses a mainframe box and ultrasonic imaging equipment, wherein the mainframe box comprises a box body, a board card, a cover body assembly and a limiting piece; the limiting piece is rotatably connected to the board card, and the inner wall of the box body is provided with a limiting groove; when the limiting piece rotates to a locking state, the limiting piece is positioned in the limiting groove; when the limiting piece rotates to an unlocking state, the limiting piece is separated from the limiting groove; the cover body assembly is used for being separated from the board card and abutting against the limiting part when moving for a first stroke in the direction back to the box body so as to limit the limiting part to rotate to an unlocking state. The lid subassembly butt locating part when breaking away from with the integrated circuit board for opening the in-process of lid subassembly, the locating part is in the lock-up state, and the integrated circuit board can not deviate from the box along with the lid subassembly and influence the maintenance.

Description

Mainframe box and ultrasonic imaging equipment

Technical Field

The application relates to the field of medical instruments, in particular to a mainframe box and an ultrasonic imaging device.

Background

The main case of the desktop ultrasonic imaging device mainly comprises: the PC board card, the PHV board card, the TR board card and the connecting board are all arranged in the mainframe box in a mode of being plugged in the connecting board.

Based on the demand of maintenance, need dismantle and assemble the relevant module in the equipment mainframe box, but the fixed mode of connecting plate leads to relevant integrated circuit board to take out together when can dismantling the connecting plate, dismantles for the clothes and brings inconvenience.

Disclosure of Invention

The application provides a mainframe box and ultrasonic imaging equipment.

In one aspect, the present application provides a main chassis, comprising:

the box body is provided with an opening, and the cover body component covers the opening of the box body; the board card is inserted on the cover body assembly and is positioned in the box body;

the mainframe box also comprises a limiting piece which is rotatably connected to the board card; the inner wall of the box body is provided with a limiting groove; when the limiting piece rotates to a locking state, the limiting piece is positioned in the limiting groove so as to limit the movement of the board card relative to the box body; when the limiting piece rotates to an unlocking state, the limiting piece is separated from the limiting groove, so that the board card can move relative to the box body;

the cover body assembly is used for being separated from the board card and abutting against the limiting part to limit the limiting part to rotate to the unlocking state when moving in the direction back to the box body for a first stroke.

The limiting piece is rotatably connected to the board card through the rotating connecting piece; the limiting part comprises a locking part positioned at one end of the rotating connecting piece and a power part positioned at the other end of the rotating connecting piece;

when the limiting piece rotates to a locking state, the locking part is positioned in the limiting groove; when the limiting piece rotates to an unlocking state, the locking part is separated from the limiting groove; when the cover body assembly moves in the direction back to the box body by the first stroke and is separated from the board card, the power part abuts against the cover body assembly to limit the locking part to rotate to the unlocking state.

When the cover body assembly moves in the direction back to the box body by the first stroke and is separated from the board card, the power part rotates by a first angle and abuts against the cover body assembly to limit the locking part to rotate to the unlocking state.

When the limiting piece rotates from the locking state to the unlocking state, the distance of the moving of the end point of the power part in the direction departing from the box body is L3; the first stroke is L1; when the cover body assembly covers the opening of the box body, the distance from the end point of the power part to the inner side of the cover body assembly is L2; the L3> (L1+ L2).

The inner surface of the cover body assembly is provided with a convex portion, and when the cover body assembly moves in the direction back to the box body and the first stroke is separated from the board card, the convex portion is abutted to the limiting piece.

When the cover body assembly covers the opening of the box body, the convex part abuts against the limiting part.

Wherein an end of the locking part is arc-shaped.

The limiting parts comprise two limiting parts, the two limiting parts are symmetrically arranged at two ends, close to the inner wall of the box body, of the board card, and the limiting grooves are formed in two ends of the inner wall of the box body.

The cover body assembly comprises a cover body and a mother board, wherein the mother board is positioned on the inner side of the cover body and is fixedly connected with the cover body; the mother board is provided with one of a male seat or a female seat, the board card is provided with the other of the male seat or the female seat, and the board card is inserted on the mother board through the cooperation of the male seat and the female seat.

In another aspect, the present application also provides an ultrasound imaging apparatus, including:

the probe, the display, the control panel and the host are in signal connection;

the host comprises a shell and a host box, and the host box is positioned in the shell;

the mainframe box comprises a box body, a board card and a cover body assembly, wherein the box body is provided with an opening, and the cover body assembly covers the opening of the box body; the board card is inserted on the cover body assembly and is positioned in the box body;

the limiting piece of the mainframe box is rotatably connected to the board card; the inner wall of the box body is provided with a limiting groove; when the limiting piece rotates to a locking state, the limiting piece is positioned in the limiting groove so as to limit the movement of the board card relative to the box body; when the limiting piece rotates to an unlocking state, the limiting piece is separated from the limiting groove, so that the board card can move relative to the box body;

the cover body assembly is used for being separated from the board card and abutting against the limiting part to limit the limiting part to rotate to the unlocking state when the cover body assembly moves a first stroke in a direction back to the box body.

The application provides a mainframe box breaks away from with the integrated circuit board when the first stroke of lid subassembly motion to the direction of keeping away from the box to the butt locating part, rotate to the unblock state with the restriction locating part, make when opening the lid subassembly of mainframe box, the integrated circuit board can not deviate from and influence the maintenance from the box along with the lid subassembly.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings required for the embodiments will be briefly described below, and obviously, the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a schematic diagram of an ultrasound imaging apparatus provided by an embodiment of the present application;

FIG. 2 is a schematic view of a main cabinet provided in an embodiment of the present application;

FIG. 3 is a cross-sectional view of a main cabinet according to an embodiment of the present application;

fig. 4 is a partially enlarged view of a position of a limiting element according to an embodiment of the present disclosure;

fig. 5 is a partially enlarged view of a position of a limiting element according to an embodiment of the present disclosure;

fig. 6 is a partially enlarged view of a position of a limiting element according to an embodiment of the present disclosure;

fig. 7 is a partially enlarged view of a position limiting element according to an embodiment of the present disclosure;

fig. 8 is a schematic view of a position limiter according to an embodiment of the present disclosure;

FIG. 9 is a simplified model diagram of a position limiter in different states according to an embodiment of the present disclosure;

FIG. 10 is a schematic view of a cover assembly according to an embodiment of the present disclosure;

FIG. 11 is a cross-sectional view of a main cabinet according to an embodiment of the present application;

fig. 12 is a cross-sectional view of a main cabinet according to an embodiment of the present application.

Detailed Description

The technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.

As shown in fig. 1, an embodiment of the present application provides an ultrasonic imaging apparatus, including a probe 4, a display 2, a control panel 3 and a host 1, where the probe 4 is configured to transmit an ultrasonic wave and receive an ultrasonic echo, the host 1 is configured to process an ultrasonic echo signal, the display 2 is configured to display an ultrasonic image and related parameters, the control panel 3 is configured to receive an input from a user, and the probe 4, the display 2, the control panel 3 and the host are in signal connection to implement signal transmission between components of the ultrasonic host, thereby completing a function of ultrasonic imaging. The main unit 1 further includes a housing and a main unit case 11, the main unit case 11 is located inside the housing and is used for implementing at least part of functions of the ultrasonic imaging apparatus, and one or more main unit cases 11 may be provided. For maintenance and repair, the main cabinet 11 is movable relative to the main housing and further, can be removed from the main housing to facilitate repair of the main cabinet 11 and repair of the internal components of the main cabinet 11.

As shown in fig. 2, in an exploded view of the main cabinet 11 according to an embodiment, the main cabinet 11 includes a cabinet 13, a board 12 and a cover assembly 14, the cabinet 13 has an opening, the cover assembly 14 covers the opening of the cabinet 13, and the board 12 is plugged into the cover assembly 14 and located inside the cabinet 13. The board card 12 may be one or more, and may include at least one of a PC board card, a PHV board card, and a TR board card. The box body 13 is provided with an opening, the board 12 can be placed in the box body 13 through the opening, the cover body assembly 14 covers the opening of the box body 13, and the board 12 is inserted into the inner side of the cover body assembly 14, so that the board 12 can be stabilized in the box body 13.

As shown in fig. 3, in a cross-sectional view of the main cabinet of an embodiment, the main cabinet 11 further includes a limiting member 15, the limiting member 15 is rotatably connected to the board 12, a limiting groove 16 is disposed on an inner wall of the cabinet 13, and the limiting member 15 and the limiting groove 16 are engaged with each other. For example, as shown in fig. 4, when the limiting member 15 rotates to the locking state, the limiting member 15 is located in the limiting groove 16 to limit the movement of the board 12 relative to the box 13; as shown in fig. 5, when the limiting member 15 rotates to the unlocking state, the limiting member 15 disengages from the limiting groove 16, so that the board 12 can move relative to the box 13. In one scenario, when the ultrasonic imaging device is in use, the board card 12 is stabilized in the box body 13 of the main cabinet 11, the limiting member 15 is in a locked state, and the limiting member 15 is located in the limiting groove 16; when the maintenance personnel need to maintain the board 12, the cover assembly 14 of the main cabinet 11 needs to be opened, the limiting member 15 is rotated, the limiting member 15 is separated from the limiting groove 16, the limiting member 15 is in an unlocking state, and the maintenance personnel can move the board 12 out of the box 13 along the opening direction of the box 13.

However, sometimes, since the board 12 is plugged into the cover assembly 14, when the force for opening the cover assembly 14 of the main cabinet 11 is greater than the locking force of the limiting member 15, the board 12 may move out of the opening of the cabinet 13 along with the movement of the cover assembly 14, which causes inconvenience for the maintenance personnel and may cause damage to the board 12. As shown in fig. 3, since the card 12 is plugged into the cover assembly 14, when the cover assembly 14 moves in a direction away from the box 13, a force F1 is applied to the card 12 in the direction away from the box 13; because the limiting piece 15 is positioned in the limiting groove 16, when the board 12 has a tendency to move away from the box body 13, the limiting piece 15 gives the board a force F2 towards the box body; when the card 12 is too tightly plugged into the cover assembly 14 or when the force for opening the cover assembly 14 is not appropriate, i.e., F1> F2, the card 12 may move with the cover 14 and move out of the opening of the housing 13.

As shown in fig. 6, in one embodiment, the cover assembly 14 is configured to disengage from the board 12 and abut against the limiting member 15 when moving the first stroke L1 away from the box 13, so as to limit the rotation of the limiting member 15 to the unlocking state. When the cover assembly 14 moves by a first stroke L1 in a direction away from the box 13, the cover assembly 14 is disengaged from the board 12, where the cover assembly 14 is just disengaged from the board 12, and at this time, the board 12 is converted from a force F1 applied by the cover assembly 14 in a direction away from the box 13 to a force not applied by the cover assembly 14. When the critical state that lid subassembly 14 and integrated circuit board 12 break away from, lid subassembly 14 butt locating part 15 to limit locating part 15 to rotate to the unblock state, because lid subassembly 14 has butted locating part 15, even the power F1 that deviates from box 13 that integrated circuit board 12 received is very big, because locating part 15 is by lid subassembly 14 butt, can't rotate to the unblock state, spacing groove 16 will continue to butt locating part 15, so that locating part 15 gives the integrated circuit board to the power F2 ' of box direction is greater than power F2 under free state, make F2 ' ═ F1, integrated circuit board 12 can not continue the motion to the direction that deviates from box 13, next moment, lid subassembly 14 breaks away from integrated circuit board 12 completely, F1 ═ 0, the integrated circuit board is stabilized in box 13, whole in-process can not take out integrated circuit board 12 owing to open integrated circuit board subassembly 14.

Referring to fig. 3 to 7, in an embodiment, the main cabinet 11 further includes a rotation connector 17, the rotation connector 17 rotatably connects the limiting member 15 to the board 12, and the limiting member 15 includes a locking portion 152 at one end of the rotation connector 17 and a power portion 151 at the other end of the rotation connector 17. The rotary connector 17 may be an independent component for connecting the board 12 and the limiting member 15; the rotating connecting piece 17 can also be integrated with the board 12, and the board 12 is connected with the limiting piece 15 through the rotating connecting piece 17 on the board; the rotating connector 17 may also be integrated with the limiting member 15, and the limiting member 15 is connected to the board 12 through the rotating connector thereon.

When the limiting member 15 rotates to the locking state, the locking portion 152 is located in the limiting groove 16 on the inner wall of the box 13, as shown in fig. 4 for example. When the limiting member 15 rotates to the unlocking state, the locking portion 152 is disengaged from the limiting groove 16 on the inner wall of the box 13, as shown in fig. 5 for example. When the cover assembly 14 moves in a direction away from the box 13 by the first stroke L1 to disengage from the board 12, the power portion 151 abuts against the cover assembly 14 to limit the locking portion 152 to rotate to the unlocked state, for example, as shown in fig. 6, at this time, the board 12 is still located in the box 13 because the locking portion 152 is still located in the limiting groove 16.

As shown in fig. 6, in an embodiment, when the cover assembly 14 moves back from the box 13 by the first stroke L1 to disengage from the board 12, the power portion 151 rotates by the first angle α and abuts against the cover assembly 14 to limit the locking portion 152 from rotating to the unlocked state. It can be understood that the limiting members 15 are all located in the limiting grooves 16 when rotating within a certain angle range, i.e. all are in a locking state. Specifically, with the opening direction of the limiting groove 16 as an initial angle, when the power portion 151 of the limiting member 15 rotates from the initial angle to the critical angle θ, the locking portion 152 is still located in the limiting groove 16, that is, the limiting member 15 is in a locking state; when the power portion 151 rotates to the critical angle θ, the locking portion 152 is disengaged from the limiting groove 16, i.e., the limiting member 16 is switched from the locking state to the unlocking state. When the cover assembly 14 moves back to the box 13 by the first stroke L1 to disengage from the board 12, the power portion 151 rotates by the first angle α, α may be the first angle α from the initial angle, where α < θ, that is, the power portion 151 has not rotated to the critical angle, although the power portion 151 rotates by a certain angle, the limiting member 15 is still in the locked state, at this time, the power portion 151 abuts against the cover assembly 14, so that the power portion 151 cannot rotate any further, and accordingly, the locking portion 152 cannot rotate to disengage from the limiting groove 16, so that the limiting member 15 is always in the locked state.

As shown in fig. 4 to 7, in an embodiment, when the limiting element 15 rotates from the locked state to the unlocked state, the distance that the end point of the power portion 151 moves in the direction away from the box body is L3, which may be the unlocking stroke of the limiting element 15, that is, the distance that the end point of the power portion 151 moves in the direction away from the box body when the limiting element 15 rotates from the initial angle to the critical angle. The first stroke, which is the stroke of the cover assembly 14 moving back from the box 13 until just separating from the board 12, is L1; when the cover assembly 14 covers the opening of the box body 13, the distance from the end point of the power part 151 to the inner side of the cover assembly is L2; the relationship between the three is L3> (L1+ L2). It can be understood that L1+ L2 is a distance that the limiting member 15 can move from the initial state to the cover assembly 14 in a state that the cover assembly 14 moves back away from the box 13 until just being disengaged from the board 12, and when the distance is smaller than the unlocking stroke L3 of the limiting member 15, the limiting member 15 is still in the locked state, so that the board 12 cannot be disengaged from the box 13.

As shown in fig. 8 and 9, in one embodiment, the limiting member 15 may be simplified to be a uniform strip-shaped body disposed along the opening direction of the limiting groove 16, and the rotation angle is a critical angle θ when the limiting member 15 rotates from the locked state to the unlocked state, and the rotation angle is θ when the power portion 151 rotates from the locked state to the unlocked state as a part of the limiting member 15. The length of the power part 151 is L, and the length may be the distance between the rotary connector 17 and the end point of the power part 151 in the opening direction of the limiting groove 16. It can be understood that the unlocking stroke L3 of the limiting member 15 has a mathematical relationship with the length L of the power portion 151: l3 ═ lssin θ, and further, L sin θ > (L1+ L2) can be obtained.

In order to achieve the effect of limiting the rotation of the limiting member 15 to the unlocking state when the cover assembly 14 moves away from the box 13 to disengage from the board 12 and the cover assembly 14 abuts against the limiting member 15, in one embodiment, the power portion 151 may be set to be long enough, that is, the length L of the power portion 151 is set to L > (L1+ L2)/sin θ. In another embodiment, the sum of the first stroke and the distance from the end point of the power portion 151 to the inner side of the cover assembly when the cover assembly 14 is closed can be reduced, so that (L1+ L2) < L sin θ, specifically, the first stroke can be reduced, so that the cover assembly 14 can be separated from the board 12 when moving a short distance in the direction away from the box 13; the distance from the end point of the power unit 151 to the inside of the cover assembly when the cover assembly 14 is closed may be reduced, for example, the power unit 151 may be made wider, or a protrusion may be provided on the cover assembly 14 to reduce the distance from the power unit 151 when the cover assembly 14 is closed. The critical angle θ may be increased, for example, by changing the form of the stopper groove 16, or by changing the material of the lock portion 152 so that the critical angle is increased, so that sin θ > (L1+ L2)/L may be provided.

Referring to fig. 10 to 11, in an embodiment, the inner surface of the cover assembly 14 is provided with a protrusion 144, and when the cover assembly 14 moves in a direction away from the box 13 for a first stroke to disengage from the board 12, the protrusion 144 abuts against the limiting member. By providing the protrusion 144 on the inner surface of the cover assembly 14, when the cover assembly 14 moves in a first stroke in a direction away from the box 13, the protrusion 144 shortens a movement distance of the power portion 151 of the limiting member 15, so that when the cover assembly 14 is separated from the board 12, the protrusion 144 abuts against the limiting member 15, specifically, the protrusion 144 may abut against the power portion 151 of the limiting member 15, so as to limit the limiting member 15 from continuing to rotate to the unlocking state. When the cover assembly 14 is covered at the opening of the box 13, the protrusion 144 may abut against the limiting member 15, or may have a gap with the limiting member 15, so long as L2< L3-L1, the rotation of the limiting member 15 to the unlocking state may be limited by abutting against the limiting member 15 when the cover assembly 14 moves in the first stroke in the direction away from the box 13.

In one embodiment, when the cover assembly 14 covers the opening of the box 13, the protrusion 144 abuts against the limiting member 15. In a state where the cover assembly 14 is covering the opening of the box 13, the protrusion 144 abuts against the stopper 15, so that L2 can be further shortened, and L2 is 0, so that in a process where the cover assembly 14 moves in a direction away from the box 13 to disengage from the board 12, a rotation angle of the stopper 15 is smaller, a distance in which an end point of the power portion 141 of the stopper 15 moves in a direction away from the box 13 is smaller, and stability of the board 12 is better. When the cover assembly 14 is covering the opening of the box 13, the protrusion 144 abuts against the stopper 15, so that the main cabinet 11 is more stable in the covering state, and the board 12 is prevented from loosening inside the main cabinet 11 when the main cabinet 11 is subjected to an external force.

In one embodiment, the surface of the convex portion 144 close to the inner side of the box 13 may be further provided with a pad 145, the pad 145 is made of a soft material, when the cover assembly 14 moves back from the box 13 for a first stroke to disengage from the board 12, the pad 145 on the convex portion 144 abuts against the limiting member 15, and since the pad 145 is made of a soft material, the impact generated when the limiting member 15 rotates to abut against the convex portion 144 is buffered, and the possible abnormal sound and the damage of the related elements are prevented.

As shown in fig. 8, in an embodiment, the end of the locking portion 152 of the position-limiting member 15 is a circular arc, and the circular arc at the end of the locking portion 152 facilitates the locking portion 152 to enter and exit from the position-limiting groove 16. Further, the end of the locking portion 152 of the limiting member 15 may be made of a soft adhesive material, so that the locking portion 152 has a certain deformation amount when being pressed, so that the locking portion 152 can easily enter and exit from the limiting groove 16, and a user can conveniently rotate the limiting member 15 when manually unlocking and locking.

In an embodiment, the limiting member 15 may further include a connecting portion 153, which is connected to the rotating connector 17, so that the limiting member 15 is rotatably connected to the board. The connecting portion 153 may be wider than the locking portion 152 and the power portion 151, so that the connection between the limiting member 15 and the board 12 is more stable, and meanwhile, the locking portion 152 and the power portion 151 are thinner than the connecting portion 153, which is beneficial for a user to move the power portion 151 to rotate the limiting member 15, and meanwhile, is beneficial for the locking portion 152 to enter and leave the limiting groove 16.

In one embodiment, the rotation connector 17 may be located at a side of the connecting portion of the position-limiting member 15 near the inside of the box 13, so that the rotation connecting point around which the position-limiting member 15 is wound is offset from the geometric center of the position-limiting member 15, so that the locking portion 152 can more easily enter the position-limiting groove 16. The power portion 151 may be located at a side of the rotary connector 17 outside the box body 13, so that it is easier for a user to hold the power portion 151 to rotate the limiting member 15.

As shown in fig. 3, in an embodiment, the two limiting members 15 include two, the two limiting members 15 are symmetrically disposed at two ends of the board 12 close to the inner wall of the box 13, and the limiting grooves 16 are disposed at two ends of the inner wall of the box 13. The two limiting parts 15 are symmetrically arranged at two ends, close to the inner wall of the box body 13, of the board card 12 and are matched with the limiting grooves 16 arranged at two ends of the inner wall of the box body 13, so that the limiting parts 15 can evenly apply force to the board card 12 from two ends, the board card 12 is more stable when the limiting parts 15 are located in a locking state and when the limiting parts 15 are switched from the locking state to an unlocking state.

As shown in fig. 2, 10 and 12, the cover assembly 14 includes a cover 147 and a motherboard 141, wherein the motherboard 141 is located inside the cover 147 and is fixedly connected with the cover 147, including being detachably connected; the motherboard 141 is provided with one of a male socket and a female socket, the board 12 is provided with the other of the male socket and the female socket, and the board 12 is inserted into the motherboard 141 through the cooperation of the male socket and the female socket. In one case, the motherboard 141 is provided with a male socket 146, the board 12 is provided with a female socket 121, and the female socket 121 of the board 12 is plugged into the male socket 146 of the motherboard 141, so that the board 12 is plugged into the cover assembly 14 and located inside the box 13. In another case, a female socket is disposed on the motherboard 141, a male socket is disposed on the board 12, and the male socket on the board 12 is plugged into the female socket on the motherboard 141, so that the board 12 is plugged into the cover assembly 14 and located inside the box 13. It can be understood that the first stroke L1 may be a plugging stroke of the male seat and the female seat, and in order to make L1 in L3> (L1+ L2) smaller, the plugging stroke of the male seat and the female seat may be reduced.

The features mentioned above in the description, the claims and the drawings can be combined with one another in any desired manner, insofar as they are of significance within the scope of the invention. The advantages and features described for the main cabinet apply in a corresponding manner to the ultrasound imaging apparatus.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims (10)

1. A main cabinet, comprising:

the box body is provided with an opening, and the cover body component covers the opening of the box body; the board card is inserted on the cover body assembly and is positioned in the box body;

the mainframe box also comprises a limiting piece which is rotatably connected to the board card; the inner wall of the box body is provided with a limiting groove; when the limiting piece rotates to a locking state, the limiting piece is positioned in the limiting groove so as to limit the movement of the board card relative to the box body; when the limiting piece rotates to an unlocking state, the limiting piece is separated from the limiting groove, so that the board card can move relative to the box body;

the cover body assembly is used for being separated from the board card and abutting against the limiting part to limit the limiting part to rotate to the unlocking state when moving in the direction back to the box body for a first stroke.

2. The main cabinet of claim 1, wherein:

the limiting piece is rotatably connected to the board card through the rotating connecting piece; the limiting part comprises a locking part positioned at one end of the rotating connecting piece and a power part positioned at the other end of the rotating connecting piece;

when the limiting piece rotates to a locking state, the locking part is positioned in the limiting groove; when the limiting piece rotates to an unlocking state, the locking part is separated from the limiting groove; when the cover body assembly moves in the direction back to the box body by the first stroke and is separated from the board card, the power part abuts against the cover body assembly to limit the locking part to rotate to the unlocking state.

3. The main cabinet of claim 2, wherein when the cover assembly moves in a direction away from the cabinet for the first stroke to disengage from the board, the power portion rotates a first angle and abuts against the cover assembly to limit the locking portion from rotating to the unlocked state.

4. A main cabinet according to claim 2 or 3, wherein:

when the limiting piece rotates from the locking state to the unlocking state, the distance of the moving of the end point of the power part in the direction departing from the box body is L3;

the first stroke is L1;

when the cover body assembly covers the opening of the box body, the distance from the end point of the power part to the inner side of the cover body assembly is L2;

the L3> (L1+ L2).

5. The main cabinet of claim 4, wherein:

the inner surface of the cover body assembly is provided with a convex portion, and when the cover body assembly moves in the direction back to the box body and the first stroke is separated from the board card, the convex portion is abutted to the limiting piece.

6. The main cabinet of claim 5, wherein:

when the cover body assembly covers the opening of the box body, the convex part is abutted to the limiting part.

7. The main cabinet of claim 2, wherein:

the end of the locking portion is arc-shaped.

8. The main cabinet according to any one of claims 1 to 3, 5 to 7, wherein:

the locating part includes two, two locating part symmetries set up at the integrated circuit board and are close to the both ends of box inner wall, the spacing groove sets up box inner wall both ends.

9. The main cabinet according to any one of claims 1 to 3, 5 to 7, wherein:

the cover body assembly comprises a cover body and a mother board, and the mother board is positioned on the inner side of the cover body and fixedly connected with the cover body; the mother board is provided with one of a male seat or a female seat, the board card is provided with the other of the male seat or the female seat, and the board card is inserted on the mother board through the cooperation of the male seat and the female seat.

10. An ultrasound imaging apparatus, comprising:

the probe, the display, the control panel and the host are in signal connection;

the host comprises a shell and a host box, and the host box is positioned in the shell;

the mainframe box comprises a box body, a board card and a cover body assembly, wherein the box body is provided with an opening, and the cover body assembly covers the opening of the box body; the board card is inserted on the cover body assembly and is positioned in the box body;

the limiting piece of the mainframe box is rotatably connected to the board card; the inner wall of the box body is provided with a limiting groove; when the limiting piece rotates to a locking state, the limiting piece is positioned in the limiting groove so as to limit the movement of the board card relative to the box body; when the limiting piece rotates to an unlocking state, the limiting piece is separated from the limiting groove, so that the board card can move relative to the box body;

the cover body assembly is used for being separated from the board card and abutting against the limiting part to limit the limiting part to rotate to the unlocking state when the cover body assembly moves a first stroke in a direction back to the box body.

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