CN2065495U - Portable stringing machine for tennis racket - Google Patents
Portable stringing machine for tennis racket Download PDFInfo
- Publication number
- CN2065495U CN2065495U CN 90212460 CN90212460U CN2065495U CN 2065495 U CN2065495 U CN 2065495U CN 90212460 CN90212460 CN 90212460 CN 90212460 U CN90212460 U CN 90212460U CN 2065495 U CN2065495 U CN 2065495U
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- afterburning
- string
- cam
- centre
- gyration
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Abstract
The utility model relates to a portable stringing machine for tennis rackets, which comprises a base, a racket fixing mechanism, and a stringing mechanism, wherein, the racket fixing mechanism comprises a cross beam, a cross beam seat, a support, and a plate pressing device; the stringing mechanism comprises a forcing arm, a balancer, an upright post, a forcing cam, a string pressing device, and a tension controlling and displaying device. The utility model has the advantages that the structure is simple; the operation is convenient; the string can not be broken as stringing; the tension of the string can be controlled; the service life of the string can be prolonged; the cost is one seconds of the cost of the stringing machine in the prior art.
Description
The utility model belongs to sports equipment processing, repairs machinery, relates to a kind of racket (tennis racket, racket etc.) and opens the string machine.
When racket is in use clapped string and fractureed, need more renew string or supplemental chords, traditional practice is to adopt homemade simple and crude instrument---lease rods, and the artificial Zhang Xian of hand-held lease rods, so not only can not obtain tension force comparatively accurately, and work efficiency is low, labour intensity is big.Flourish along with motion such as tennis, shuttlecock, in order to satisfy growing needs, it is reported, Klippermate produced in USA opens the string machine, T.R. opens string machine (seeing U.S. Tennis magazine 1989.10.P94), Taiwan has produced R.O.C. and has opened the string machine, compares with lease rods, and one is progressive beyond doubt, but find that in use above-mentioned three kinds string machines have the following disadvantages respectively:
Klippermata opens the string machine when opening string, and the string end is all bitten by the tooth on the jaw, and institute add tension force big more, bite also seriously more, thereby use in the batting process because the life-span of bat string has just been snaped the lute string, shortened greatly to the stress concentration phenomenon from biting at racket; In addition, be not provided with tension force control display unit in this machine, reach the required optimum tension of string when therefore being difficult to guarantee string.T.R. the afterburning feed screw nut of employing of a string who opens the string machine drives moving of slide and realizes that its structure is comparatively complicated; In addition, need use three special-purpose string fixing pincers simultaneously when opening string, thereby the cost height.
The string end clamping device rigidity of R.O.C. opening the string machine is bad, the folder string is not firm, be easy to skid, and compresses the string end if adopt by the string of opening, then since pressure cause too greatly by the dark impression of pressure place generation, the basal area that this has just changed string influences the maximum tension that it can bear at square stance.
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of simple in structure, cost is low, the tension force in the time of can controlling string, do not damage again clap string open the string machine, to guarantee to clap the life-span that the required tension force of string, raising are clapped string.
The utility model is made up of base, racket fixed mechanism, a string mechanism.The racket fixed mechanism comprises crossbeam, beam seat, left socle, right support, presser device; Opening string mechanism comprises and adds the arm of force, counterweight, column, afterburning cam, central shaft, pressure string device, tension force control display unit.During assembling, beam seat is positioned at the left end of base, column is positioned at the right-hand member of base, crossbeam is fixed on the beam seat, left socle, right support be separately fixed at crossbeam about the end, two identical presser devices of structure are installed in the top of left socle and right support respectively, afterburning cam is positioned column upper end (this central shaft is the pivot of its centre of gyration) by central shaft, adding the arm of force is fixed on the afterburning cam with pressing the string device, its axis is orthogonal, counterweight is installed in and adds on the arm of force, and each part of tension force control display unit lays respectively on column and the afterburning cam.
Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.
Fig. 1 is a structure diagram of the present utility model; Fig. 2 is for opening the structure chart of string mechanism; Fig. 3 is the M-M profile; Fig. 4 is the N-N profile; Fig. 5 is the A-B-C-D profile.
As shown in Figure 1, the base of present embodiment (1) is a rectangular slab; The racket fixed mechanism comprises crossbeam (2), beam seat (15), left socle (3), right support (4), presser device (14); Opening string mechanism comprises and adds the arm of force (5), counterweight (6), column (7), afterburning cam (8), central shaft (21), presses string device, tension force control display unit.
As Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, afterburning cam (8) is the circle eccentric cam, is processed with one on it plane of pressing the string device is installed; Press the string device to form by wrapping post (9), pressure string sleeve (10), handle (18), pivot screw (19), wrapping post (9) is a cylinder, the link of itself and afterburning cam (8) has straight knurling, its lateral surface is processed with plane and this plane that pressure string sleeve (10) is installed and is provided with a screw (20), one end of pivot screw (19) screws in the screw (20) of wrapping post (9), the other end screws on presses string sleeve (10), and handle (18) is fixed on the end of pressing string sleeve (10); Tension force control display unit by locking ball (11), adjustment screw (16), afterburning locating hole (17), afterburning sign, decide journey backing pin (12), stop screw (13) is formed, locking ball (11) is installed on the column (7) by adjustment screw (16), the centre of gyration of its centre of sphere and afterburning cam (8) is contour, and equals the distance of the center of afterburning locating hole (17) to the afterburning cam centre of gyration with the distance of the afterburning cam centre of gyration.Afterburning locating hole (17) is a taper hole, its number shows that with the control of tension force class is corresponding, be arranged on afterburning cam (8) near the end face of column (7) and to be positioned at the centre of gyration be on the same circumference in the center of circle, the number of afterburning sign is identical with the number of afterburning locating hole (17), be positioned on the periphery of afterburning cam (8) and corresponding with the position of afterburning locating hole (17), deciding journey backing pin (12) is extension type, be fixed on the column (7) by stop screw (13), to limit afterburning cam (8) thus anglec of rotation control to the added tension force of string with add the initial position of the arm of force (5).
According to test and calculating, clap the required tension force of string generally between 55lbs to 65lbs, if the control of tension force shows that class is a third gear, and be respectively 55lbs, 60lbs, 65lbs, the optimum size of the excircle configuration of then afterburning cam (8) is that the optimum distance between 55 millimeters of φ, geometric center and the centre of gyration is 6 millimeters, geometric center becomes 30 ° of angles with the line of the centre of gyration with the plane on the afterburning cam, and the angle between the afterburning locating hole (17) is 16 °.
Method of operating of the present utility model is as follows:
The racket of putting on string is placed on the left and right support (3) (4), regulates left and right sides support (3) (4) and crossbeam (2) center symmetry, then lock bracket, compress racket.When opening string, should hand taut string and string is walked around afterburning cam (8) from adding the arm of force (5) outside, again from the inboard of wrapping post (9), twine 2～3 circles at the straight knurling place of wrapping post (9), go up string and turning handle (18) screws and presses string sleeve (10), string is compressed in the plane around pivot screw (19) with counter-clockwise direction on the plane of twining then on the terminal (9).Rotate lentamente along clockwise direction afterwards and add the arm of force (5) to horizontal level, promptly reach first grade of tension force, if continue to rotate to an angle, promptly reach second grade of tension force, when afterburning cam (8) with decide journey backing pin (12) and then can not continue reinforcing again when contacting, if need to increase tension force, then should extract and continue rotation and add the arm of force deciding journey backing pin (12).After string reaches requirement tension force, clamp the string of stretching tensioning with special vice, make again to add the arm of force (5) and reset.In whole the string process, the position of crossbeam (2) can be not solid dead, and it will obtain an equilbrium position automatically.
The utlity model has following advantage:
1. when opening string, string is wrapped in is pressed the end face of string sleeve to be pressed on the plane of wrapping post again behind 2～3 circles on the annular knurl face of cylinder of wrapping post, because the moment of friction that the anti-string that the annular knurl face of cylinder produces string skids is very big, therefore press the string sleeve only to need string applied that littler pressure can cramping be on the plane of wrapping post securely with it, string can not skid when having guaranteed reliably string like this.
2. when opening string, because string is pressed in the plane of wrapping post and presses between the end face of string sleeve, this two plane is smooth parallel surface, so string can not bitten by the cramping place; Again owing to be that cramping one section string (about 30 millimeters of length) during cramping, so clamping force obtains disperseing at string, and pressure reduces greatly, has guaranteed that string can not weighed wounded, and area of section is reduced, thereby can improve the service life of clapping string.
3. owing to be provided with tension force control display unit, can guarantee that string reaches needed tension force.
4. simple in structure, cost is low, only is external existing 1/2nd of the string machine price of opening.
Claims (3)
1, a kind of racket is opened the string machine, by base (1), the racket fixed mechanism, opening string mechanism forms, the racket fixed mechanism comprises crossbeam (2), beam seat (15), left socle (3), right support (4), presser device (14), opening string mechanism comprises and adds the arm of force (5), counterweight (6), column (7), it is characterized in that also comprising afterburning cam (8), central shaft (21), press string device and tension force control display unit, during assembling, beam seat (15) is positioned at the left end of base (1), column (7) is positioned at the right-hand member of base (1), crossbeam (2) is fixed on the beam seat (15), left socle (3), right support (4) be separately fixed at crossbeam (2) about the end, two identical presser devices (14) of structure are installed in the top of left socle (3) and right support (4) respectively, afterburning cam is positioned column (7) upper end (this central shaft is the pivot of its centre of gyration) by central shaft (21), adding the arm of force (5) is fixed on the afterburning cam (8) with pressing the string device, its axis is orthogonal, counterweight (6) is installed in and adds on the arm of force (5), and each part of tension force control display unit lays respectively on column (7) and the afterburning cam (8).
2, according to claim 1 string machine is characterized in that:
1. afterburning cam (8) is the circle eccentric cam, is processed with one on it plane of pressing the string device is installed,
2. press the string device by wrapping post (9), press string sleeve (10), handle (18), pivot screw (19) is formed, wrapping post (9) is a cylinder, the link of itself and afterburning cam (8) has straight knurling, its lateral surface is processed with plane and this plane that pressure string sleeve (10) is installed and is provided with a screw (20), one end of pivot screw (19) screws in the screw (20) of wrapping post (9), the other end screws on presses string sleeve (10), handle (18) is fixed on the end of pressing string sleeve (10)
3. tension force control display unit is by locking ball (11), adjustment screw (16), afterburning locating hole (17), afterburning sign, decide journey backing pin (12), stop screw (13) is formed, locking ball (11) is installed on the column (17) by adjustment screw (16), the centre of gyration of its centre of sphere and afterburning cam (8) is contour, and equal the distance of the center of afterburning locating hole (17) to the afterburning cam centre of gyration with the distance of the afterburning cam centre of gyration, afterburning locating hole (17) is a taper hole, its number shows that with the control of tension force class is corresponding, be arranged on afterburning cam (8) near the end face of column (7) and to be positioned at the centre of gyration be on the same circumference in the center of circle, the number of afterburning sign is identical with the number of afterburning locating hole (17), be positioned on the periphery of afterburning cam (8) and corresponding with the position of afterburning locating hole (17), deciding journey backing pin (12) is extension type, be fixed on the column (7) by stop screw (13), to limit afterburning cam (8) thus anglec of rotation control to the added tension force of string with add the initial position of the arm of force (5).
3, according to claim 1,2 described string machines, it is characterized in that when the control of tension force shows class be third gear and when being respectively 55lbs, 60lbs, 65lbs, the optimum size of the excircle configuration of afterburning cam (8) is that the optimum distance between 55 millimeters of φ, geometric center and the centre of gyration is 6 millimeters, geometric center becomes 30 ° of angles with the line of the centre of gyration with the plane on the afterburning cam, and the angle between the afterburning locating hole (17) is 16 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90212460 CN2065495U (en) | 1990-03-27 | 1990-03-27 | Portable stringing machine for tennis racket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90212460 CN2065495U (en) | 1990-03-27 | 1990-03-27 | Portable stringing machine for tennis racket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2065495U true CN2065495U (en) | 1990-11-14 |
Family
ID=4892011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90212460 Withdrawn CN2065495U (en) | 1990-03-27 | 1990-03-27 | Portable stringing machine for tennis racket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2065495U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101099890B (en) * | 2006-05-15 | 2013-07-03 | 阿道夫·布伦纳 | Racket string tension measuring device of racket |
-
1990
- 1990-03-27 CN CN 90212460 patent/CN2065495U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101099890B (en) * | 2006-05-15 | 2013-07-03 | 阿道夫·布伦纳 | Racket string tension measuring device of racket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |