CN215204165U

CN215204165U - Convenient to use's binding means

Info

Publication number: CN215204165U
Application number: CN202120908489.8U
Authority: CN
Inventors: 张金莲; 蒙秋丽; 王轶
Original assignee: Shandong Zibo Tobacco Co ltd
Current assignee: Shandong Zibo Tobacco Co ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2021-12-17
Anticipated expiration: 2031-04-29

Abstract

A binding device convenient to use belongs to the technical field of binding devices. The method is characterized in that: the two staplers (4) are arranged side by side at intervals, each stapler (4) is movably arranged on the binding frame, each stapler (4) is in threaded connection with the adjusting screw (14), the rotating directions of the threads at the two ends of the adjusting screw (14) are opposite, the input end of the speed regulating mechanism is provided with the hand wheel (5), and the output end of the speed regulating mechanism is connected with the adjusting screw (14); the pressing plate (6) can be arranged on the binding frame in a swinging mode, the pressing plate (6) is connected with the speed increasing mechanism, the output end of the speed increasing mechanism is connected with the pressing plate (6), and the pressing rod (10) is connected with the input end of the speed increasing mechanism. This convenient to use's binding means can enough quick adjustment two staplers's interval, can carry out the essence to the interval of stapler again and adjust, convenient to use, and only need control depression bar swing less angle, can make two staplers accomplish simultaneously through the clamp plate and bind convenient operation.

Description

Convenient to use's binding means

Technical Field

A binding device convenient to use belongs to the technical field of binding devices.

Background

A stapler is a necessity for binding documents, and sometimes needs to be bound twice to complete binding of documents when binding documents in learning or work. Most of the existing staplers can only perform stapling one by one.

The utility model discloses a chinese utility model patent of application number 201620498234.8 discloses a press and order high-efficient stapling device more, sets up a plurality of staplers on its base, still is provided with on the base and takes the scale track, and the upside of stapler is provided with the depression bar, can make two staplers accomplish simultaneously through the depression bar and bind. But the following technical problems exist in the using process: 1) the position of each stapler needs to be adjusted independently, the adjusting operation is inconvenient, and the adjusting precision of the two sides is limited; 2) since the stapler is directly mounted on the track with the scale, the stapler moves when pressed by the pressing lever, resulting in a change in the relative positions of the two staplers and a lower stapling accuracy.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the defects of the prior art are overcome, the distance between the staplers can be rapidly adjusted, the distance between the staplers can be accurately adjusted, the distance between the staplers is stable, and the convenient-to-use binding device is convenient to operate during use.

The utility model provides a technical scheme that its technical problem adopted is: this convenient to use's binding means, its characterized in that: the stapler comprises a binding frame, two staplers, an adjusting screw rod and a pressure rod, wherein the two staplers are arranged side by side at intervals, each stapler is movably arranged on the binding frame, the adjusting screw rod is rotatably arranged on the binding frame, each stapler is in threaded connection with the adjusting screw rod, the rotating directions of threads at the two ends of the adjusting screw rod are opposite, the adjusting screw rod is connected with a speed regulating mechanism, the input end of the speed regulating mechanism is provided with a hand wheel, and the output end of the speed regulating mechanism is connected with the adjusting screw rod;

the top of binding frame installs the clamp plate, and the clamp plate setting is at the stapler upside, and the clamp plate wobbling is installed on binding the frame, and the clamp plate is connected with speed increasing mechanism, and speed increasing mechanism's output links to each other with the clamp plate to drive its swing, the depression bar links to each other with speed increasing mechanism's input.

Preferably, the binding frame comprises a base, a stand column and a mounting frame, the mounting frame is arranged on the upper side of the base, the stand column is arranged between the base and the mounting frame, the stapler is movably arranged on the base, the adjusting screw rod is rotatably arranged on the base, and the pressing plate is arranged on the mounting frame in a swinging mode. The pressure plate is arranged on the mounting frame in a swinging mode, the stapler is movably arranged on the base, the pressure plate is located on the upper side of the stapler, the stapling action of the stapler can be achieved through the swinging of the pressure plate, the synchronous action of the two staplers is guaranteed, the pressure plate is not prone to deformation, and the consistency of the stapling action of the two staplers can be guaranteed.

Preferably, the speed regulating mechanism comprises an adjusting shaft, a fine adjustment input gear, a fine adjustment output gear, a coarse adjustment input gear, a coarse adjustment output gear and a sleeve, the adjusting shaft is parallel to the adjusting screw and arranged at intervals, the fine adjustment input gear and the coarse adjustment input gear are both mounted on the adjusting shaft and rotate synchronously with the adjusting shaft, the fine adjustment output gear and the coarse adjustment output gear are arranged on the adjusting screw side by side at intervals and can rotate relative to the adjusting screw, the sleeve is sleeved outside the adjusting screw in a sliding mode, the sleeve and the adjusting screw keep rotating synchronously, the sleeve is arranged between the fine adjustment output gear and the coarse adjustment output gear, meshing devices are arranged between the sleeve and the fine adjustment output gear and between the sleeve and the coarse adjustment output gear, and the hand wheel is connected with the adjusting shaft. The sleeve is shifted to enable the sleeve to be meshed with the fine adjustment output gear or meshed with the coarse adjustment output gear, so that the transmission ratio between the adjusting screw and the adjusting shaft is adjusted, conversion between fine adjustment and coarse adjustment is conveniently achieved, and operation is convenient during conversion.

Preferably, both ends of the sleeve are provided with driven side teeth, the side part of the fine adjustment output gear is provided with driving side teeth meshed with the side teeth on the corresponding side of the sleeve, and the side part of the coarse adjustment output gear is also provided with driving side teeth meshed with the side teeth on the corresponding side of the sleeve to form the meshing device.

Preferably, still include the box, speed adjusting mechanism sets up in the box, and one side of box is provided with the regulation slot hole, and the regulation slot hole is on a parallel with adjusting screw and sets up, and the muffjoint has the driving lever that promotes its along adjusting screw axial motion, and the tip of driving lever stretches out the box after passing the regulation slot hole, is provided with the resetting means who makes the sleeve reset between driving lever and the box. Can adjust telescopic position through the driving lever, it is convenient to adjust, and speed adjusting mechanism wholly is located the box, can avoid speed adjusting mechanism's work to receive external disturbance, guarantees speed adjusting mechanism job stabilization.

Preferably, resetting means include reset spring, install on the driving lever and be used for adjusting slot hole confined baffle, the baffle is along with driving lever simultaneous movement, all is provided with the guide bar between the both ends of baffle and the corresponding side of box, each guide bar all is connected with baffle slidable, all overlaps outside each guide bar and is equipped with reset spring, reset spring is in compression state to the meshing device separation that makes the sleeve both sides. The two return springs are matched, so that the engaging devices on the two sides of the sleeve can be separated simultaneously, the problem that the position of the stapler moves due to mistaken touch of the hand wheel can be avoided in the use process, and the stapling accuracy of the stapler in the use process is ensured.

Preferably, the speed increasing mechanism comprises a driven gear, a driving gear and an idler wheel, the idler wheel is arranged between the driven gear and the driving gear and is simultaneously meshed with the driven gear and the driving gear, the pressing rod is connected with the driving gear to drive the driving gear to rotate, the pressing plate is connected with the driven gear and synchronously swings along with the rotation of the driven gear, and the number of teeth of the driving gear is greater than that of the driven gear. The idler wheel enables the driving gear and the driven gear to rotate in the same direction, the number of teeth of the driving gear is larger than that of the driven gear, namely the driving gear rotates by a small angle, the driven gear can drive the pressing plate to swing, the two staplers can complete stapling, and the operation is more convenient.

Preferably, the two speed increasing mechanisms are arranged on two sides of the pressure plate, the input ends of the two speed increasing mechanisms are connected through a synchronizing shaft, and the pressure rod is connected with the synchronizing shaft and drives the synchronizing shaft to rotate. The two speed increasing mechanisms are arranged on the two sides of the pressing plate, so that the stress balance of the two sides of the pressing plate can be ensured, and the two staplers can be ensured to operate synchronously.

Compared with the prior art, the utility model discloses the beneficial effect who has is:

this convenient to use's binding apparatus's speed governing mechanism can adjust the drive ratio between hand wheel and the adjusting screw, can enough the interval of quick adjustment two staplers, can carry out the fine adjustment to the interval of stapler again, high durability and convenient use, because threaded connection between stapler and the adjusting screw, can guarantee after the position of adjusting the stapler, the stapler position is fixed, avoid the position of stapler to take place to remove when using, influence the accuracy of binding, when binding a plurality of files, can guarantee to bind unanimously, the depression bar passes through acceleration mechanism and links to each other with the clamp plate, make the wobbling angle of clamp plate be greater than the wobbling angle of depression bar, only need control the depression bar swing a less angle, can make two staplers accomplish simultaneously through the clamp plate and bind, high durability and convenient operation.

Drawings

Fig. 1 is a front view schematically showing a binding apparatus which is convenient to use.

Fig. 2 is a schematic top view of a convenient binding apparatus.

Fig. 3 is a perspective view of the stapler mounted.

Fig. 4 is a front sectional view of the governor mechanism.

Fig. 5 is a partial enlarged view of a portion a in fig. 4.

In the figure: 1. the stapler comprises a stand column 2, a mounting frame 3, a base 4, a stapler 5, a hand wheel 6, a pressure plate 7, a driven gear 8, an idler gear 9, a driving gear 10, a pressure rod 11, a mounting shaft 12, a synchronizing shaft 13, a mounting wheel 14, an adjusting screw rod 15, an adjusting shaft 16, a box body 1601, an adjusting long hole 17, a fine adjusting input gear 18, a coarse adjusting input gear 19, a fine adjusting output gear 20, a coarse adjusting output gear 21, a sleeve 22, a shift lever 23, a baffle plate 24, a guide rod 25 and a return spring.

Detailed Description

Fig. 1 to 5 are preferred embodiments of the present invention, and the present invention will be further explained with reference to fig. 1 to 5.

A binding device convenient to use comprises a binding frame, two staplers 4, an adjusting screw 14 and a pressure lever 10, wherein the two staplers 4 are arranged side by side at intervals, each stapler 4 is movably arranged on the binding frame, the adjusting screw 14 is rotatably arranged on the binding frame, each stapler 4 is in threaded connection with the adjusting screw 14, the rotating directions of threads at two ends of the adjusting screw 14 are opposite, the adjusting screw 14 is connected with a speed regulating mechanism, the input end of the speed regulating mechanism is provided with a hand wheel 5, and the output end of the speed regulating mechanism is connected with the adjusting screw 14; the top of binding frame is installed and is pressed plate 6, and pressing plate 6 sets up at 4 upsides of stapler, and the pressure plate 6 is wobbling to be installed on binding frame, and pressing plate 6 is connected with speed increasing mechanism, and speed increasing mechanism's output links to each other with pressing plate 6 to drive its swing, depression bar 10 links to each other with speed increasing mechanism's input. This convenient to use's binding apparatus's speed adjustment mechanism can adjust the drive ratio between hand wheel 5 and adjusting screw 14, can enough the interval of two staplers 4 of quick adjustment, can carry out the fine adjustment to the interval of stapler 4 again, high durability and convenient use, because threaded connection between stapler 4 and adjusting screw 14, can guarantee after the position of adjusting stapler 4, stapler 4 rigidity, avoid when using the position of stapler 4 to take place to remove, influence the accuracy of binding, when binding a plurality of files, can guarantee to bind unanimously, depression bar 10 links to each other with clamp plate 6 through acceleration mechanism, the angle that makes clamp plate 6 wobbling is greater than the angle that the depression bar 10 swung, only need to manipulate depression bar 10 swing a less angle, can make two staplers 4 accomplish simultaneously through clamp plate 6 and bind, high durability and convenient operation.

The present invention is further described with reference to specific embodiments, however, it will be understood by those skilled in the art that the detailed description given herein with respect to the drawings is for better explanation and that the present invention is necessarily to be construed as limited to those embodiments, and equivalents or common means thereof will not be described in detail but will fall within the scope of the present application.

Specifically, the method comprises the following steps: as shown in FIGS. 1-2: the binding frame comprises a stand column 1, a mounting frame 2 and a base 3, wherein the base 3 is horizontally arranged, the mounting frame 2 is horizontally arranged on the upper side of the base 3, and the mounting frame 2 and the base 3 are arranged at intervals. The stand 1 sets up between base 3 and mounting bracket 2, and the lower extreme of stand 1 links to each other with base 3, and the upper end links to each other with mounting bracket 2. The stand 1 is provided with two side by side along the width direction of base 3, and two stands 1 all set up the left side at base 3.

The rotatable installation axle 11 that installs of mounting bracket 2, the installation axle 11 sets up along the length direction level of base 3, and the equal rotatable installation in mounting bracket 2 in both ends of installation axle 11, the upper end of clamp plate 6 is installed on installation axle 11 to along with the rotation of installation axle 11 and synchronous swing. The stapler 4 can be slidably mounted on the base 3, the pressing plate 6 is inclined downwards gradually from left to right, and the lower end of the pressing plate 6 is in a semicircular shape with a convex middle part, so that the stapler 4 can be prevented from being damaged.

The speed increasing mechanism has two that set up at installation axle 11 both ends, speed increasing mechanism installs on mounting bracket 2, still rotate on mounting bracket 2 and install synchronizing shaft 12, synchronizing shaft 12 is parallel to be set up with installation axle 11, and synchronizing shaft 12 sets up with installation axle 11 interval, two speed increasing mechanism's input links to each other with the both ends of synchronizing shaft 12 respectively, thereby guarantee two speed increasing mechanism synchronization motion, speed increasing mechanism's output links to each other with the one end that installation axle 11 corresponds, make the both ends atress of clamp plate 6 balanced, guarantee that two staplers 4 remain synchronization motion throughout. The torsion spring is arranged between the mounting shaft 11 and the mounting frame 2, so that the pressing plate 6 can be assisted to reset, and the stapler 4 is ensured to reset quickly, so that the files can be bound continuously.

The middle part of the synchronizing shaft 12 is provided with a mounting wheel 13, the mounting wheel 13 is arranged coaxially with the synchronizing shaft 12 and keeps synchronous rotation with the synchronizing shaft 12, the pressure lever 10 is arranged along the radial direction of the mounting wheel 13, one end of the pressure lever 10 is fixedly connected with the side part of the mounting wheel 13 so as to conveniently drive the mounting wheel 13 to rotate and further drive the pressure plate 6 to swing, and thus the binding of the stapler 4 is completed.

Each speed increasing mechanism comprises a driven gear 7, an idler gear 8 and a driving gear 9, wherein the driving gear 9 is coaxially arranged at one end corresponding to the synchronizing shaft 12 and synchronously rotates along with the synchronizing shaft 12, the driven gear 7 is arranged at one end corresponding to the mounting shaft 11, the driven gear 7 drives the mounting shaft 11 to synchronously rotate, the idler gear 8 is rotatably arranged on the mounting frame 2, the idler gear 8 is arranged between the driving gear 9 and the driven gear 7, and the idler gear 8 is simultaneously meshed with the driving gear 9 and the driven gear 7 so that the driving gear 9 and the driven gear 7 rotate in the same direction. The number of teeth of the driving gear 9 is greater than that of the driven gear 7, so that the pressing rod 10 can swing by a small angle to complete the binding action of the stapler 4, and the operation is convenient.

As shown in fig. 3: the adjusting screw 14 is rotatably mounted on the base 3, the adjusting screw 14 is arranged along the length direction of the base 3, the rotating directions of the threads at the two ends of the adjusting screw 14 are opposite, the staplers 4 are in threaded connection with the two ends of the adjusting screw 14, the positions of the two staplers 4 can be adjusted by rotating the adjusting screw 14, the distance between the two staplers 4 can be adjusted, and the adjustment is convenient.

As shown in FIGS. 4-5: the base 3 is also provided with a speed regulating mechanism which is arranged in the box body 16. The speed regulating mechanism comprises a regulating shaft 15, a fine regulating input gear 17, a fine regulating output gear 19, a coarse regulating input gear 18, a coarse regulating output gear 20 and a sleeve 21, wherein the regulating shaft 15 is rotatably installed on the box body 16, the right end of the regulating shaft 15 extends out of the box body 16, a hand wheel 5 is installed at the right end of the regulating shaft 15, and the regulating shaft 15 can be rotated through the hand wheel 5. The adjusting shafts 15 are arranged parallel to the adjusting screw 14, and the adjusting shafts 15 are arranged at intervals on the upper side of the adjusting screw 14. The fine adjustment input gear 17 and the coarse adjustment input gear 18 are coaxially mounted on the adjusting shaft 15 and synchronously rotate along with the adjusting shaft 15, the fine adjustment input gear 17 and the coarse adjustment input gear 18 are arranged at intervals, the fine adjustment output gear 19 and the coarse adjustment output gear 20 are coaxially mounted on the adjusting screw 14, and the fine adjustment output gear 19 and the coarse adjustment output gear 20 are arranged in a manner of rotating relative to the adjusting screw 14. The fine adjustment input gear 17 is meshed with the fine adjustment output gear 19, the coarse adjustment input gear 18 is meshed with the coarse adjustment output gear 20, the number of teeth of the fine adjustment input gear 17 is smaller than that of the fine adjustment output gear 19, and the number of teeth of the coarse adjustment input gear 18 is larger than that of the coarse adjustment output gear 20. The sleeve 21 is slidably sleeved outside the adjusting screw 14, the sleeve 21 and the adjusting screw 14 are synchronously rotated, the right end of the adjusting screw 14 is a spline shaft, and an internal spline is arranged on the inner wall of the sleeve 21, so that the adjusting screw 14 synchronously rotates along with the sleeve 21. Meshing devices are arranged between the sleeve 21 and the fine adjustment output gear 19 and between the sleeve 21 and the coarse adjustment output gear 20.

The two ends of the sleeve 21 are provided with driven side teeth, the end surface of the fine adjustment output gear 19 is provided with driving side teeth meshed with the driven side teeth on the corresponding side of the sleeve 21, and the end surface of the coarse adjustment output gear 20 is provided with driving side teeth meshed with the driven side teeth on the corresponding side of the sleeve 21, so that an engaging device is formed.

The lower side of the sleeve 21 is connected with a shift lever 22 which drives the sleeve to move along the axial direction of the adjusting screw 14, the shift lever 22 is arranged along the radial direction of the sleeve 21, the bottom of the box 16 is provided with an adjusting long hole 1601, the adjusting long hole 1601 is arranged in parallel with the adjusting screw 14, the lower end of the shift lever 22 penetrates through the adjusting long hole 1601 and extends downwards, and the position of the sleeve 21 can be adjusted through the shift lever 22, so that the sleeve 21 is meshed with the coarse adjustment output gear 20 or the fine adjustment output gear 19.

The driving lever 22 is connected with a resetting device, the resetting device comprises a resetting spring 25, the driving lever 22 is connected with a baffle 23, the baffle 23 moves synchronously with the driving lever 22, the baffle 23 seals the adjusting long hole 1601, and foreign matters are prevented from entering the box 16 and affecting the operation of the speed regulating mechanism.

Both ends of baffle 13 all buckle towards the middle part of box 16, form the guide part, guide bar 24 is all installed to the inner wall both sides of box 16, the one end of guide bar 24 links to each other with the box 16 inner wall, the other end is connected with guide part slidable, each guide bar 24 all overlaps and is equipped with reset spring 25 outward, reset spring 25 is in compression state, reset spring 25's one end is supported on the box 16 inner wall, the other end supports on the guide part of corresponding side, two reset spring 25's elasticity equals when initial condition, so that sleeve 21 is located between coarse adjustment output gear 20 and fine adjustment output gear 19, namely when initial condition, rotation hand wheel 5 can not lead to adjusting screw 14's rotation, in order to avoid because the position that the mistake bumped hand wheel 5 leads to stapler 4 moves.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a convenient to use's binding means which characterized in that: the stapler comprises a binding frame, two staplers (4), an adjusting screw rod (14) and a pressure rod (10), wherein the two staplers (4) are arranged side by side at intervals, each stapler (4) is movably arranged on the binding frame, the adjusting screw rod (14) is rotatably arranged on the binding frame, each stapler (4) is in threaded connection with the adjusting screw rod (14), the rotating directions of threads at two ends of the adjusting screw rod (14) are opposite, the adjusting screw rod (14) is connected with a speed regulating mechanism, the input end of the speed regulating mechanism is provided with a hand wheel (5), and the output end of the speed regulating mechanism is connected with the adjusting screw rod (14);

the top of binding frame is installed clamp plate (6), and clamp plate (6) set up in stapler (4) upside, and what clamp plate (6) were wobbling installs on binding the frame, and clamp plate (6) are connected with speed increasing mechanism, and speed increasing mechanism's output links to each other with clamp plate (6) to drive its swing, and depression bar (10) link to each other with speed increasing mechanism's input.

2. The convenient-to-use binding apparatus of claim 1, wherein: the binding frame comprises a base (3), a stand column (1) and a mounting frame (2), wherein the mounting frame (2) is arranged on the upper side of the base (3), the stand column (1) is arranged between the base (3) and the mounting frame (2), a stapler (4) is movably arranged on the base (3), an adjusting screw rod (14) is rotatably arranged on the base (3), and a pressing plate (6) is arranged on the mounting frame (2) in a swinging manner.

3. The convenient-to-use binding apparatus of claim 1, wherein: the speed regulation mechanism comprises a regulation shaft (15), a fine regulation input gear (17), a fine regulation output gear (19), a coarse regulation input gear (18), a coarse regulation output gear (20) and a sleeve (21), wherein the regulation shaft (15) is parallel to and spaced from a regulation screw (14), the fine regulation input gear (17) and the coarse regulation input gear (18) are both installed on the regulation shaft (15) and rotate synchronously with the regulation shaft, the fine regulation output gear (19) and the coarse regulation output gear (20) are arranged on the regulation screw (14) side by side and spaced from each other and can rotate relatively to the regulation screw (14), the sleeve (21) can be slidably sleeved outside the regulation screw (14), the sleeve (21) and the regulation screw (14) keep synchronous rotation, the sleeve (21) is arranged between the fine regulation output gear (19) and the coarse regulation output gear (20), and the sleeve (21) and the fine regulation output gear (19) and the sleeve (21) and the coarse regulation output gear (21) are arranged Meshing devices are arranged between the wheels (20), and the hand wheel (5) is connected with the adjusting shaft (15).

4. A convenient to use binding apparatus according to claim 3, further comprising: the two ends of the sleeve (21) are provided with driven side teeth, the side part of the fine adjustment output gear (19) is provided with driving side teeth meshed with the driven side teeth on the corresponding side of the sleeve (21), and the side part of the coarse adjustment output gear (20) is also provided with driving side teeth meshed with the driven side teeth on the corresponding side of the sleeve (21), so that the meshing device is formed.

5. A convenient to use binding apparatus according to claim 3, further comprising: still include box (16), speed adjusting mechanism sets up in box (16), and one side of box (16) is provided with adjusts slot hole (1601), and adjust slot hole (1601) and be on a parallel with adjusting screw (14) and set up, and sleeve (21) are connected with and promote its driving lever (22) along adjusting screw (14) axial motion, and the tip of driving lever (22) passes and stretches out box (16) behind adjusting slot hole (1601), is provided with the resetting means who makes sleeve (21) reset between driving lever (22) and box (16).

6. The convenient-to-use binding apparatus of claim 5, wherein: resetting means include reset spring (25), install on driving lever (22) and be used for adjusting slotted hole (1601) confined baffle (23), baffle (23) are along with driving lever (22) simultaneous movement, all be provided with guide bar (24) between the both ends of baffle (23) and the corresponding side of box (16), each guide bar (24) all are connected with baffle (23) slidable, each guide bar (24) all overlap and are equipped with reset spring (25) outward, reset spring (25) are in compression state, and make the meshing device separation of sleeve (21) both sides.

7. The convenient-to-use binding apparatus of claim 1, wherein: speed increasing mechanism include driven gear (7), driving gear (9) and idler (8), idler (8) set up between driven gear (7) and driving gear (9) to simultaneously with driven gear (7) and driving gear (9) meshing, depression bar (10) link to each other with driving gear (9), drive its rotation, clamp plate (6) link to each other with driven gear (7), and along with the rotation of driven gear (7) and synchronous oscillation, the number of teeth of driving gear (9) is greater than the number of teeth of driven gear (7).

8. Convenient-to-use binding device according to claim 1 or 7, characterized in that: the two speed-increasing mechanisms are arranged on two sides of the pressure plate (6), the input ends of the two speed-increasing mechanisms are connected through a synchronizing shaft (12), and the pressure rod (10) is connected with the synchronizing shaft (12) and drives the synchronizing shaft to rotate.