Fixing mechanism and size detection equipment for die cutting material

Abstract

The utility model discloses a fixing mechanism and a die cutting material dimension detection device, and relates to the die cutting material detection technology field, the fixing mechanism comprises a transmission fixing assembly, the transmission fixing assembly comprises a transmission member, a fixing member and a shielding member, the fixing member and the shielding member are installed on the surface of the transmission member, the transmission member comprises a vertical plate and a conveyer belt, and the vertical plate is provided with a plurality of vertical plates. The fixing piece is installed on the surfaces of the vertical plate and the conveying belt, the shielding piece comprises a long plate, a fixing rod and a baffle, the long plate is fixedly connected to the bottom of the vertical plate, and the two ends of the fixing rod are fixedly connected with the long plate and the baffle respectively. Materials can be rapidly fixed through the conveying and fixing assembly and do not need to be limited through two clamping plates, the materials are not prone to being blocked, the materials can be taken down conveniently and rapidly after detection is completed, the materials which are not placed correctly can be pushed to the corresponding positions through the detection assembly to be corrected and detected, and the detection efficiency is improved. The detection result is accurate, and errors are reduced.

Description

Technical Field

[0001] This utility model relates to the field of die-cut material testing technology, and in particular to a fixing mechanism and a size testing device for die-cut materials. Background Technology

[0002] The 3C industry refers to computers, communications, and consumer electronics products, while die-cutting materials mainly refer to the die-cutting processing materials used in the manufacturing of these products. Die-cutting technology is used to manufacture parts, protective films, insulating materials, etc. After these materials are processed, they require high-precision dimensional inspection, which requires the use of fixing mechanisms.

[0003] When die-cutting materials are fixed, they are usually limited by two clamping plates. This can easily cause the material to be obstructed during the inspection process, affecting the accuracy of dimensional inspection. Furthermore, when removing the clamping plates after inspection, manual operation of the corresponding handles is required, which is not quick. In addition, materials that are not placed correctly cannot be pushed to the correct position during dimensional inspection, resulting in inaccurate inspection results and large errors. Utility Model Content

[0004] In view of the problems existing in the above-mentioned fixed mechanisms, this utility model is proposed.

[0005] Therefore, the problem to be solved by this utility model is how to solve the problem that when die-cut materials are fixed, they are generally limited by two clamping plates, which can easily cause obstruction of the material during the inspection process, affecting the accuracy of the size inspection. Furthermore, when the material is removed after inspection, it is not quick enough to manually operate the corresponding handle to detach the clamping plates.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a fixing mechanism, comprising a transmission fixing component, including a transmission component, a fixing component and a shielding component, wherein the fixing component and the shielding component are installed on the surface of the transmission component, the transmission component includes a vertical plate and a conveyor belt, and the fixing component is installed on the surface of the vertical plate and the conveyor belt.

[0007] In a preferred embodiment of the fixing mechanism described in this utility model, the transmission component further includes a connecting plate, a driving component, a placement frame, and a reinforcing rod. The connecting plate is fixedly connected to the bottom of the vertical plate, the driving component is installed on the surface of the vertical plate, the conveyor belt is disposed on the surface of the driving component, the placement frame is fixedly connected to the surface of the conveyor belt, and the reinforcing rod is fixedly connected to the inside of the conveyor belt.

[0008] In a preferred embodiment of the fixing mechanism described in this utility model, the blocking component includes a long plate, a fixing rod, and a baffle. The long plate is fixedly connected to the bottom of the vertical plate, and the two ends of the fixing rod are fixedly connected to the long plate and the baffle, respectively.

[0009] In a preferred embodiment of the fixing mechanism of this utility model, the driving component includes a roller, a rotating rod, a synchronous disc, and a synchronous belt. The roller is rotatably connected to the surface of the vertical plate and located on one side thereon. The conveyor belt is sleeved on the surface of the roller. The rotating rod is rotatably connected to the surface of the vertical plate and located at its bottom. The synchronous disc is fixedly connected to both ends of the rotating rod and one end of the roller. The synchronous belt is sleeved on the surface of the synchronous disc.

[0010] As a preferred embodiment of the fixing mechanism of this utility model, the driving component further includes a cover and a first motor. The cover is fixedly connected to the surface of the vertical plate and sleeved on the surface of the synchronous belt. The first motor is fixedly connected to the surface of the cover, and its output shaft is fixedly connected to the surface of the synchronous disc.

[0011] As a preferred embodiment of the fixing mechanism of this utility model, the fixing component includes an air frame, a hose, a horizontal tube, a round shell, and a through hole. The air frame is fixedly connected to the surface of the conveyor belt, and two adjacent air frames are connected by a hose. The horizontal tube is fixedly connected to the surface of the vertical plate, the round shell is sleeved on the surface of the horizontal tube, and the through hole is opened on the surface of the horizontal tube.

[0012] As a preferred embodiment of the fixing mechanism of this utility model, the fixing component further includes a telescopic sleeve, a sphere, and an air pump. One end of the telescopic sleeve is connected to the surface of the spherical shell, the sphere is rotatably connected to the surface of the air frame, the other end of the telescopic sleeve is fixedly connected to the inner wall of the sphere, and the air pump is fixedly connected to the surface of the vertical plate, with its input end connected to one end of the horizontal pipe.

[0013] The advantages of this utility model are as follows: This utility model can quickly fix materials through the transmission and fixing component, without the need for two clamping plates to limit the material, which is less likely to obstruct the material, and it is convenient and quick to remove the material after the inspection is completed.

[0014] In view of the problems existing in the dimensional inspection equipment for die-cut materials, this utility model is proposed.

[0015] Therefore, the problem to be solved by this utility model is how to solve the problem that improperly placed materials cannot be pushed to the corresponding position and corrected during size inspection, resulting in inaccurate structure and large error in the inspection.

[0016] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a dimension detection device for die-cut materials, comprising a detection component disposed on top of a transmission and fixing component, including a frame, a laser scanner, an industrial camera and a straightening component, wherein the frame is fixedly connected to the top of a vertical plate, and the laser scanner and the industrial camera are fixedly connected to the surface of the frame.

[0017] In a preferred embodiment of the die-cutting material dimension detection device of this utility model, the correcting component includes a moving component and a pushing component. The pushing component is installed on the surface of the moving component. The moving component includes a horizontal plate, a lead screw, a second motor, a guide rod, and a moving plate. The horizontal plate is fixedly connected to the surface of the frame. The lead screw is rotatably connected to the surface of the horizontal plate. The second motor and the guide rod are fixedly connected to the surface of the horizontal plate. The output shaft of the second motor is fixedly connected to one end of the lead screw. The moving plate is sleeved on the surface of the lead screw and the guide rod.

[0018] In a preferred embodiment of the die-cutting material dimension detection device of the present invention, the pushing member is mounted on the surface of the moving plate, and the pushing member includes a slide rod, a push plate, a roller and a spring. The slide rod is movably connected to the surface of the moving plate and fixedly connected to the surface of the push plate. The roller is rotatably connected to the surface of the push plate. The spring is sleeved on the surface of the slide rod, and its two ends are fixedly connected to the surfaces of the moving plate and the push plate, respectively.

[0019] The beneficial effects of this utility model are: the detection component can push misplaced materials to the corresponding position for correct detection, making the detection results more accurate and reducing errors. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the fixed mechanism.

[0022] Figure 2 This is a 3D structural diagram of a die-cut material dimensional inspection device.

[0023] Figure 3 Dimensional inspection equipment for die-cut materials Figure 2 Enlarged structural diagram of A in the middle.

[0024] Figure 4 A three-dimensional structural diagram of the fixing mechanism and the dimensional inspection equipment for die-cutting materials.

[0025] Figure 5 This is a partial sectional three-dimensional structural diagram of the fixed mechanism.

[0026] Figure 6 This is a sectional three-dimensional structural diagram of a portion of the fixed mechanism.

[0027] Figure 7 For fixed mechanism Figure 6Enlarged structural diagram of B in the middle.

[0028] In the diagram: 100, Conveying and fixing assembly; 101, Conveying component; 102, Fixing component; 103, Blocking component; 200, Detection assembly; 201, Frame; 202, Laser scanner; 203, Industrial camera; 204, Alignment component; 101a, Vertical plate; 101b, Connecting plate; 101c, Conveyor belt; 101d, Driving component; 101e, Placement rack; 101f, Reinforcing rod; 101d-1, Roller; 101d-2, Rotating rod; 101d-3, Synchronous disc; 101d-4, Synchronous belt; 101d-5, Cover; 101d-6, First motor; 10 2a. Air frame; 102b. Hose; 102c. Horizontal tube; 102d. Round shell; 102e. Through hole; 102f. Telescopic sleeve; 102g. Ball; 102h. Air pump; 103a. Long plate; 103b. Fixed rod; 103c. Baffle; 204a. Moving part; 204a-1. Horizontal plate; 204a-2. Lead screw; 204a-3. Second motor; 204a-4. Guide rod; 204a-5. Moving plate; 204b. Pushing part; 204b-1. Slide rod; 204b-2. Push plate; 204b-3. Roller; 204b-4. Spring. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0032] Example 1

[0033] Reference Figure 1 and Figure 5 This is the first embodiment of the present utility model. This embodiment provides a fixing mechanism, which includes a transmission fixing component 100. The transmission fixing component 100 can quickly fix the material without the need for two clamping plates to limit it, and it is less likely to obstruct the material.

[0034] Specifically, the fixing member 102 and the shielding member 103 are installed on the surface of the transmission member 101. The transmission member 101 includes a vertical plate 101a and a conveyor belt 101c, and the fixing member 102 is installed on the surface of the vertical plate 101a and the conveyor belt 101c.

[0035] There are two vertical plates 101a, which are symmetrically distributed on both sides of the conveyor belt 101c. The material placed on the conveyor 101 can be fixed by the fixing member 102. The material is conveyed under the action of the conveyor 101. The material that has been inspected and conveyed to the end is released by the shielding member 103 for easy picking.

[0036] Example 2

[0037] Reference Figures 5-7 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0038] Specifically, the connecting plate 101b is fixedly connected to the bottom of the vertical plate 101a, the driving component 101d is installed on the surface of the vertical plate 101a, the conveyor belt 101c is set on the surface of the driving component 101d, the placement frame 101e is fixedly connected to the surface of the conveyor belt 101c, and the reinforcing rod 101f is fixedly connected to the inside of the conveyor belt 101c.

[0039] There are two connecting plates 101b, which are symmetrically fixed to the bottom of the vertical plate 101a, and the two vertical plates 101a are fixed together. The placement frame 101e is fixedly connected to the surface of the conveyor belt 101c by the support rod. The four adjacent placement frames 101e form an integral square support frame, which can support the material. There are several reinforcing rods 101f, which reinforce the conveyor belt 101c, reduce its deformation during the transmission process, and improve stability.

[0040] The long plate 103a is fixedly connected to the bottom of the vertical plate 101a, and the two ends of the fixing rod 103b are fixedly connected to the long plate 103a and the baffle 103c respectively.

[0041] When the material is moved to the end after the inspection is completed, the baffle 103c blocks the top of the air frame 102a, so that it no longer exerts suction on the material, and unlocks and fixes it for easy handling by the operator.

[0042] Roller 101d-1 is rotatably connected to the surface of vertical plate 101a and located on one side thereof. Conveyor belt 101c is sleeved on the surface of roller 101d-1. Rotary rod 101d-2 is rotatably connected to the surface of vertical plate 101a and located at its bottom. Synchronous disc 101d-3 is fixedly connected to both ends of rotary rod 101d-2 and one end of roller 101d-1. Synchronous belt 101d-4 is sleeved on the surface of synchronous disc 101d-3.

[0043] There are two rollers 101d-1, which are rotatably connected to the surface of the vertical plate 101a in pairs via bearings. The rotating rod 101d-2 is rotatably connected to the vertical plate 101a via bearings. The two opposing rollers 101d-1 rotate simultaneously under the drive of the first motor 101d-6 via the synchronous disc 101d-3 and the synchronous belt 101d-4.

[0044] The cover 101d-5 is fixedly connected to the surface of the vertical plate 101a and sleeved on the surface of the synchronous belt 101d-4. The first motor 101d-6 is fixedly connected to the surface of the cover 101d-5, and its output shaft is fixedly connected to the surface of the synchronous disc 101d-3.

[0045] The cover 101d-5 shields the synchronous disc 101d-3 and the synchronous belt 101d-4, improving safety during use and providing a location for the installation of the first motor 101d-6.

[0046] Air frame 102a is fixedly connected to the surface of conveyor belt 101c. Two adjacent air frames 102a are connected by hose 102b. Horizontal tube 102c is fixedly connected to the surface of vertical plate 101a. Round shell 102d is fitted onto the surface of horizontal tube 102c. Through hole 102e is opened on the surface of horizontal tube 102c.

[0047] Air frame 102a passes through conveyor belt 101c and is fixedly connected to its surface. Adjacent air frames 102a are connected by hose 102b without affecting the movement of air frames 102a with conveyor belt 101c. Circular shell 102d is sleeved on the surface of horizontal tube 102c by a sealed bearing. Circular tube 102c and circular shell 102d are connected by through hole 102e without affecting the connection when circular shell 102d rotates.

[0048] One end of the telescopic sleeve 102f is connected to the surface of the circular shell 102d, the sphere 102g is rotatably connected to the surface of the air frame 102a, the other end of the telescopic sleeve 102f is fixedly connected to the inner wall of the sphere 102g, the air pump 102h is fixedly connected to the surface of the vertical plate 101a, and its input end is connected to one end of the horizontal pipe 102c.

[0049] The telescopic sleeve 102f ensures the connection between the cylindrical shell 102d and the air frame 102a when the sphere 102g moves with the air frame 102a. At the same time, the sphere 102g rotates with the telescopic sleeve 102f during this process, keeping the air frame 102a moving normally with the conveyor belt 101c.

[0050] Example 3

[0051] Reference Figures 2-4 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0052] Specifically, the detection component 200 is set on top of the transmission fixing component 100, the frame 201 is fixedly connected to the top of the vertical plate 101a, the laser scanner 202 and the industrial camera 203 are fixedly connected to the surface of the frame 201, and the alignment component 204 is installed on the surface of the frame 201.

[0053] The laser scanner 202 and industrial camera 203 are existing technologies for material size detection. The working principle of this part is also existing technology, which can be clearly understood by those skilled in the art, and will not be described in detail here. The material fixed on the placement rack 101e is corrected by the straightening component 204 to improve the accuracy of detection.

[0054] The pusher 204b is mounted on the surface of the moving part 204a. The horizontal plate 204a-1 is fixedly connected to the surface of the frame 201. The lead screw 204a-2 is rotatably connected to the surface of the horizontal plate 204a-1. The second motor 204a-3 and the guide rod 204a-4 are fixedly connected to the surface of the horizontal plate 204a-1. The output shaft of the second motor 204a-3 is fixedly connected to one end of the lead screw 204a-2. The moving plate 204a-5 is sleeved on the surface of the lead screw 204a-2 and the guide rod 204a-4.

[0055] The movable plate 204a-5 is threadedly connected to the lead screw 204a-2, and the movable plate 204a-5 is slidably connected to the guide rod 204a-4. The guide rod 204a-4 guides and limits the movable plate 204a-5, so that the movable plate 204a-5 will not rotate under the drive of the lead screw 204a-2.

[0056] The pusher 204b is mounted on the surface of the movable plate 204a-5, the slide bar 204b-1 is movably connected to the surface of the movable plate 204a-5 and fixedly connected to the surface of the push plate 204b-2, the roller 204b-3 is rotatably connected to the surface of the push plate 204b-2, and the spring 204b-4 is sleeved on the surface of the slide bar 204b-1, with its two ends fixedly connected to the surfaces of the movable plate 204a-5 and the push plate 204b-2, respectively.

[0057] There are several rollers 204b-3, which are rotatably connected to the surface of the push plate 204b-2 via a rotating shaft to reduce the resistance between the rollers 204b-3 and the material to be corrected. After the rollers 204b-3 on the push plate 204b-2 come into contact with the material via a spring 204b-4, their deformation can generate elastic contact and protect the material.

[0058] In use, the operation of the air pump 102h and the first motor 101d-6 is controlled to place the material on the upper placement rack 101e. The operation of the air pump 102h generates suction at the air holes of the air frame 102a through the horizontal pipe 102c, through hole 102e, round shell 102d, telescopic sleeve 102f, and hose 102b, thereby adsorbing the material onto the placement rack 101e. The operation of the first motor 101d-6, in cooperation with the synchronous disc 101d-3, synchronous belt 101d-4, and rotating rod 101d-2, causes the roller 101d-1 to rotate, which in turn causes the conveyor belt 101c to rotate and transport the material. As the air frame 102a moves with the conveyor belt 101c, the horizontal pipe 102c is always connected to the air frame 102a through the cooperation of the round shell 102d, telescopic sleeve 102f, and sphere 102g.

[0059] When the telescopic mechanism reaches the alignment component 204, the operation of the second motor 204a-3 is controlled to rotate the lead screw 204a-2. Under the action of the guide rod 204a-4, the two sets of moving plates 204a-5 and the pusher 204b are brought closer to each other, thereby pushing the misplaced material to the corresponding position. Then, the output shaft of the second motor 204a-3 is controlled to rotate in the opposite direction, so that the moving plates 204a-5 and the pusher 204b are reset. When it moves to the area below the laser scanner 202 and the industrial camera 203, scanning and shooting are performed to achieve size detection. After the detection is completed, as the placement frame 101e moves to the top of the baffle 103c, the baffle 103c blocks the air frame 102a, losing its fixation on the material, thus making it easy to remove.

[0060] In summary, the transfer fixing component 100 can quickly fix the material. Compared with the prior art, it does not require two clamping plates to limit its position, is less likely to obstruct the material, and is convenient and quick to remove after the test. The detection component 200 can push the misplaced material to the corresponding position for correct detection. Compared with the prior art, the detection results are more accurate and the error is reduced.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fixing mechanism, characterized in that: include, A transmission fixing assembly (100) includes a transmission component (101), a fixing component (102), and a shielding component (103). The fixing component (102) and the shielding component (103) are mounted on the surface of the transmission component (101). The transmission component (101) includes a vertical plate (101a) and a conveyor belt (101c). The fixing component (102) is mounted on the surface of the vertical plate (101a) and the conveyor belt (101c).

2. The fixing mechanism as described in claim 1, characterized in that: The transmission component (101) further includes a connecting plate (101b), a driving component (101d), a placement frame (101e), and a reinforcing rod (101f). The connecting plate (101b) is fixedly connected to the bottom of the vertical plate (101a). The driving component (101d) is installed on the surface of the vertical plate (101a). The conveyor belt (101c) is disposed on the surface of the driving component (101d). The placement frame (101e) is fixedly connected to the surface of the conveyor belt (101c). The reinforcing rod (101f) is fixedly connected to the inside of the conveyor belt (101c).

3. The fixing mechanism as described in claim 1, characterized in that: The shielding component (103) includes a long plate (103a), a fixing rod (103b), and a baffle (103c). The long plate (103a) is fixedly connected to the bottom of the vertical plate (101a), and the two ends of the fixing rod (103b) are fixedly connected to the long plate (103a) and the baffle (103c) respectively.

4. The fixing mechanism as described in claim 2, characterized in that: The driving component (101d) includes a roller (101d-1), a rotating rod (101d-2), a synchronous disc (101d-3), and a synchronous belt (101d-4). The roller (101d-1) is rotatably connected to the surface of the vertical plate (101a) and located on one side thereon. The conveyor belt (101c) is sleeved on the surface of the roller (101d-1). The rotating rod (101d-2) is rotatably connected to the surface of the vertical plate (101a) and located at its bottom. The synchronous disc (101d-3) is fixedly connected to both ends of the rotating rod (101d-2) and one end of the roller (101d-1). The synchronous belt (101d-4) is sleeved on the surface of the synchronous disc (101d-3).

5. The fixing mechanism as described in claim 4, characterized in that: The drive unit (101d) also includes a cover (101d-5) and a first motor (101d-6). The cover (101d-5) is fixedly connected to the surface of the vertical plate (101a) and sleeved on the surface of the synchronous belt (101d-4). The first motor (101d-6) is fixedly connected to the surface of the cover (101d-5), and its output shaft is fixedly connected to the surface of the synchronous disc (101d-3).

6. The fixing mechanism as described in claim 1, characterized in that: The fixing component (102) includes an air frame (102a), a hose (102b), a horizontal tube (102c), a round shell (102d), and a through hole (102e). The air frame (102a) is fixedly connected to the surface of the conveyor belt (101c). Two adjacent air frames (102a) are connected by a hose (102b). The horizontal tube (102c) is fixedly connected to the surface of the vertical plate (101a). The round shell (102d) is fitted onto the surface of the horizontal tube (102c). The through hole (102e) is opened on the surface of the horizontal tube (102c).

7. The fixing mechanism as described in claim 6, characterized in that: The fixing component (102) also includes a telescopic sleeve (102f), a sphere (102g), and an air pump (102h). One end of the telescopic sleeve (102f) is connected to the surface of the cylindrical shell (102d), the sphere (102g) is rotatably connected to the surface of the air frame (102a), and the other end of the telescopic sleeve (102f) is fixedly connected to the inner wall of the sphere (102g). The air pump (102h) is fixedly connected to the surface of the vertical plate (101a), and its input end is connected to one end of the horizontal tube (102c).

8. A dimensional inspection device for die-cut materials, characterized in that: Including the fixing mechanism as described in any one of claims 1 to 7, and, The detection component (200) is disposed on top of the transmission fixing component (100) and includes a frame (201), a laser scanner (202), an industrial camera (203), and a calibrator (204). The frame (201) is fixedly connected to the top of the vertical plate (101a), the laser scanner (202) and the industrial camera (203) are fixedly connected to the surface of the frame (201), and the calibrator (204) is mounted on the surface of the frame (201).

9. The dimension inspection device for die-cut materials as described in claim 8, characterized in that: The corrective component (204) includes a movable component (204a) and a pushing component (204b). The pushing component (204b) is mounted on the surface of the movable component (204a). The movable component (204a) includes a horizontal plate (204a-1), a lead screw (204a-2), a second motor (204a-3), a guide rod (204a-4), and a movable plate (204a-5). The horizontal plate (204a-1) is fixedly connected to the frame (201). The lead screw (204a-2) is rotatably connected to the surface of the horizontal plate (204a-1), the second motor (204a-3) and the guide rod (204a-4) are fixedly connected to the surface of the horizontal plate (204a-1), the output shaft of the second motor (204a-3) is fixedly connected to one end of the lead screw (204a-2), and the moving plate (204a-5) is sleeved on the surface of the lead screw (204a-2) and the guide rod (204a-4).

10. The dimension inspection device for die-cut materials as described in claim 9, characterized in that: The pusher (204b) is mounted on the surface of the movable plate (204a-5). The pusher (204b) includes a slide rod (204b-1), a push plate (204b-2), a roller (204b-3), and a spring (204b-4). The slide rod (204b-1) is movably connected to the surface of the movable plate (204a-5) and fixedly connected to the surface of the push plate (204b-2). The roller (204b-3) is rotatably connected to the surface of the push plate (204b-2). The spring (204b-4) is sleeved on the surface of the slide rod (204b-1), and its two ends are fixedly connected to the surfaces of the movable plate (204a-5) and the push plate (204b-2), respectively.

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