Double-layer glass pressing positioning device

Abstract

The utility model discloses a double-layer glass pressing and positioning device which comprises a base, a supporting frame is arranged on the base, a pressure push rod is arranged on the supporting frame, a pressing plate is arranged at the output end of the pressure push rod, lower sliding tables are arranged at the two ends of the base in a sliding connection mode, and lower positioning plates are arranged at the two ends of the lower sliding tables in a sliding connection mode. The two ends of the pressing plate are slidably connected with upper sliding tables, the two ends of the upper sliding tables are slidably connected with upper positioning plates, linkage pieces are arranged between the upper positioning plates and the lower positioning plates, the lower end of the pressing plate is provided with a pressing pad, a suction nozzle is arranged in the pressing pad, one end of the base is provided with an air pump, and the air pump is provided with an air pipe. According to the equipment, glass of different specifications can be conveniently positioned, positioning of the two pieces of glass is carried out separately, impact during press fit can be relieved, and press fit quality and stability are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of glass production, and more specifically to a double-layer glass pressing and positioning device. Background Art

[0002] Glass is a common protective device for buildings and has many application areas. Double-layer tempered glass has a higher load-bearing capacity and good heat and sound insulation effects, and is more common in the market.

[0003] When common double-layer tempered glass is produced, adhesive is added between the glasses and then pressed together. During the pressing process, the two glasses need to be positioned to ensure accurate matching of the glasses during pressing. However, the positioning structure of common pressing equipment is mostly fixed, which cannot adapt to the positioning of glasses of different specifications and is inconvenient to use. Moreover, the positioning devices in common pressing equipment are all single structures. The positioning of the two glasses will be adjusted after the glasses are bonded to ensure the alignment of the glasses. At this time, relative movement occurs between the glasses, which will affect the position of the adhesive and the bonding effect, making the quality of the double-layer glass products unstable. In addition, the pressure equipment of the pressing equipment will provide greater pressure when working. Sometimes, if the force is not well controlled, the glass may be crushed. In addition to easily processing defective products, the device itself will also be subjected to greater pressure during operation. After long-term use, the service life of the equipment will be greatly reduced. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the problems existing in the prior art, the utility model provides a double-layer glass pressing and positioning device to solve the technical problem of poor processing effect of the glass pressing and positioning device mentioned in the background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-layer glass pressing and positioning device, comprising a base, a support frame is provided on the base, a pressure push rod is provided on the support frame, a pressure plate is provided at the output end of the pressure push rod, a lower sliding platform is slidably connected at both ends of the base, a lower positioning plate is slidably connected at both ends of the lower sliding platform, an upper sliding platform is slidably connected at both ends of the pressure plate, an upper positioning plate is slidably connected at both ends of the upper sliding platform, and a linkage is provided between the upper positioning plate and the lower positioning plate;

[0008] A pressure pad is provided at the lower end of the pressure plate, a suction nozzle is provided in the pressure pad, an air pump is provided at one end of the base, an air pipe is provided on the air pump, and the air pump is connected with the suction nozzle through the air pipe.

[0009] The utility model is further configured as follows: a support platform is provided in the middle of the base, a telescopic rod is provided at the lower end of the support platform, and a protective spring is provided at the outer end of the telescopic rod to provide a buffer structure to relieve pressure.

[0010] The utility model is further configured as follows: a protective frame is provided on the base, an elastic member is provided inside the protective frame, moving blocks are provided at both ends of the elastic member, a rotating rod is provided at the outer end of the moving block, one end of the rotating rod is rotatably connected to the moving block, and the other end is rotatably connected to the bottom of the support platform to protect the glass and equipment.

[0011] The utility model is further configured as follows: the linkage comprises a main body plate, a connecting rod and a sliding rod, one end of the connecting rod is fixedly connected to the main body plate, and the other end is connected to the lower positioning plate, one end of the sliding rod is slidably connected to the main body plate, and the other end is connected to the upper positioning plate, to facilitate the coordination between the upper and lower positioning plates.

[0012] The utility model is further configured such that the upper positioning plate and the lower positioning plate both include a first side plate and a second side plate, and one end of the first side plate is fixedly connected to one end of the second side plate at a vertical angle to facilitate fitting with the glass and positioning.

[0013] The utility model is further configured as follows: a first bracket is provided on the base, a first screw rod is provided on the first bracket, threads at both ends of the first screw rod are arranged opposite to each other and cooperate with the lower sliding platform, a first motor is provided at one end of the first bracket, and the output end of the first motor is connected to the first screw rod to facilitate controlling the movement of the lower sliding platform.

[0014] The utility model is further configured such that a second bracket is provided on the lower sliding platform, a second screw rod is provided on the second bracket, threads at both ends of the second screw rod are arranged opposite to each other and cooperate with the lower positioning plate, a second motor is provided at one end of the second bracket, and the output end of the second motor is connected to the second screw rod to facilitate controlling the movement of the lower positioning plate.

[0015] The utility model is further configured such that a first sliding plate is provided between the pressure plate and the pressure pad, the upper end of the first sliding plate is slidably connected to the pressure plate, and the lower end is slidably connected to a second sliding plate, and the sliding direction between the first sliding plate and the pressure plate is perpendicular to the sliding direction between the first sliding plate and the second sliding plate, so as to facilitate the cooperation between the pressure pad and the positioning structure.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the utility model provides a double-layer glass pressing and positioning device, which has the following beneficial effects:

[0018] 1. The base and the support frame cooperate to provide support capacity, the lower sliding platform and the lower positioning plate cooperate to limit the position of the lower glass, and the upper sliding platform and the upper positioning plate cooperate to limit the position of the upper glass. The main plate, the connecting rod and the sliding rod cooperate to form a linkage to make the lower positioning plate and the upper positioning plate move synchronously. The first bracket, the first motor, the second bracket, the second screw rod and the second motor provide power to achieve the positioning of the two glasses.

[0019] 2. The support of the support frame is set to make the pressure plate at a higher height, and the pressure pad is in contact with the glass. The air pump, air pipe and suction nozzle are used to provide suction to adsorb the upper glass onto the pressure pad, thereby fixing the upper and lower glass at the top and bottom respectively. The upper positioning plate and the lower positioning plate are used to position the upper and lower glass respectively under the action of the linkage parts, which will not affect the adhesive between the glass and ensure the quality of the double-layer glass.

[0020] 3. The glass is supported by a support platform, and cooperates with the pressure applied by the pressure push rod. The movement is limited by the telescopic rod, and a buffer effect is provided by the protection spring. Through the cooperation of the protection frame, elastic parts, moving blocks and moving rods, a buffer structure is further provided. When the support platform is under force, the pressure is absorbed, the pressure shock on the glass is reduced, and the glass is prevented from being subjected to sudden large pressure, thereby ensuring the stability of the glass pressing, reducing the pressure damage to the equipment, and protecting the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the front structure of a double-layer glass pressing and positioning device in the utility model;

[0022] Figure 2 This is a schematic diagram of the cooperation structure of the base, the lower sliding platform and the lower positioning plate in the utility model;

[0023] Figure 3 This is a schematic diagram of the matching structure of the pressure plate, the upper sliding platform and the upper positioning plate in the utility model;

[0024] Figure 4 This is a schematic diagram of the matching structure of the linkage member and the upper and lower positioning plates in the utility model;

[0025] Figure 5 It is a schematic diagram of the matching structure of the support platform, the protection spring and the protection frame in the utility model.

[0026] In the figure: 1. base; 2. support frame; 3. pressure push rod; 4. pressure plate; 5. lower sliding table; 6. lower positioning plate; 7. upper sliding table; 8. upper positioning plate; 9. linkage; 10. pressure pad; 11. suction nozzle; 12. air pump; 13. air pipe; 14. support table; 15. telescopic rod; 16. protection spring; 17. protection frame; 18. elastic member; 19. moving block; 20. rotating rod; 21. main plate; 22. connecting rod; 23. sliding rod; 24. first side plate; 25. second side plate; 26. first bracket; 27. first screw rod; 28. first motor; 29. ​​second bracket; 30. second screw rod; 31. second motor; 32. first sliding plate; 33. second sliding plate. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0029] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0030] See also Figure 1-3 A double-layer glass pressing and positioning device comprises a base 1, a support frame 2 is provided on the base 1, a pressure push rod 3 is provided on the support frame 2, a pressure plate 4 is provided at the output end of the pressure push rod 3, a lower sliding platform 5 is slidably connected at both ends of the base 1, a lower positioning plate 6 is slidably connected at both ends of the lower sliding platform 5, an upper sliding platform 7 is slidably connected at both ends of the pressure plate 4, an upper positioning plate 8 is slidably connected at both ends of the upper sliding platform 7, and a linkage 9 is provided between the upper positioning plate 8 and the lower positioning plate 6;

[0031] A pressure pad 10 is provided at the lower end of the pressure plate 4 , a suction nozzle 11 is provided in the pressure pad 10 , an air pump 12 is provided at one end of the base 1 , an air pipe 13 is provided on the air pump 12 , and the air pump 12 is connected to the suction nozzle 11 through the air pipe 13 .

[0032] When in use, the base 1 and the support frame 2 cooperate to support various devices, and the lower sliding table 5 is controlled to move on the base 1, so that the sliding table drives the lower positioning plate 6 to move in the horizontal direction, and the lower positioning plate 6 is controlled to move on the lower sliding table 5 to make the lower positioning plate 6 move in the vertical direction. When the lower positioning plate 6 moves, it will drive the upper positioning plate 8 to move together through the transmission of the connecting member 9. The upper positioning plate 8 will cooperate with the upper sliding table 7 and the pressure plate 4 to perform corresponding movement, so that the upper positioning plate 8 and the lower positioning plate 6 are in the same position on different horizontal planes, and the lower layer of glass is limited by the lower positioning plate 6, and the upper layer of glass is limited by the upper positioning plate 8. With the cooperation of the upper positioning plate 8 and the lower positioning plate 6, the upper and lower layers of glass are aligned, and then pressure is applied by the pressure push rod 3, and the two pieces of glass are pressed together under the action of the pressure plate 4.

[0033] More specifically, when installing the upper and lower layers of glass to be pressed together, the lower layer of glass is placed directly on the base 1 so that it is located between the lower positioning plates 6, and the upper layer of glass is placed between the upper positioning plates 8 below the pressure plate 4. The air pump 12 is started, and suction is provided by the air pump 12. Under the transmission of the air pipe 13, the suction nozzle 11 is provided with suction to adsorb the upper layer of glass, so that the glass is attached to the pressure pad 10 and remains fixed.

[0034] See also Figure 5 As an implementation method for pressure protection: a support platform 14 is provided in the middle of the base 1, a telescopic rod 15 is provided at the lower end of the support platform 14, and a protection spring 16 is provided at the outer end of the telescopic rod 15.

[0035] Specifically, the lower layer of glass is supported by the support platform 14. When the glass is pressed, the support platform 14 is subjected to pressure and moves downward. Under the restriction of the telescopic rod 15, the stability of the vertical movement is guaranteed, and the protection spring 16 provides support and buffering for the support platform 14 to avoid excessive pressure provided by the pressure push rod 3, which may cause the glass to break, while reducing the pressure burden on the equipment.

[0036] Please refer to Figure 5 As a further implementation of the pressure protection mechanism: a protection frame 17 is provided on the base 1, an elastic member 18 is provided inside the protection frame 17, moving blocks 19 are provided at both ends of the elastic member 18, a rotating rod 20 is provided at the outer end of the moving block 19, one end of the rotating rod 20 is rotatably connected to the moving block 19, and the other end is rotatably connected to the bottom of the support platform 14.

[0037] Specifically, when the support platform 14 moves downward under pressure, in addition to providing a buffer structure through the protection spring 16, the descent of the support platform 14 will also drive the rotation rod 20 to transmit, and the rotation rods 20 at both ends will rotate, thereby driving the moving block 19 to move toward the center of the protection frame 17. At this time, the protection blocks at both ends will squeeze the elastic member 18, and the elastic member 18 will further provide a buffer effect to ensure the safe pressing.

[0038] Please refer to Figure 4 As a further implementation of the linkage 9 mechanism: the linkage 9 includes a main body plate 21, a connecting rod 22 and a sliding rod 23, one end of the connecting rod 22 is fixedly connected to the main body plate 21, and the other end is connected to the lower positioning plate 6, one end of the sliding rod 23 is slidably connected to the main body plate 21, and the other end is connected to the upper positioning plate 8.

[0039] Specifically, the main body plate 21 is used as the main structure, and the lower positioning plate 6 and the upper positioning plate 8 are respectively connected by the connecting rod 22 and the sliding rod 23, and an extended distance is provided with the cooperation of the connecting rod 22 and the sliding rod 23 to avoid conflict between the main body plate 21 and the pressure plate 4 during pressing. In the process of pressing, the pressure plate 4 drives the upper positioning plate 8 to descend, and the upper positioning plate 8 drives the sliding rod 23 to descend. The sliding rod 23 slides along the main body plate 21 to adapt to the movement of the upper positioning plate 8 while ensuring the stable cooperation between the upper positioning plate 8 and the lower fixed plate.

[0040] Please refer to Figure 4 As a further implementation of the positioning plate mechanism: the upper positioning plate 8 and the lower positioning plate 6 both include a first side plate 24 and a second side plate 25, and one end of the first side plate 24 is fixedly connected to one end of the second side plate 25 at a vertical angle.

[0041] Specifically, through the limiting structure composed of the first side plate 24 and the second side plate 25, when the upper limiting plate and the lower limiting plate are in contact, they can both contact the two ends of the glass corner, which is convenient for pushing the glass to move and adjusting the position of the glass.

[0042] Please refer to Figure 2 As a further implementation of the lower sliding platform 5 mechanism: a first bracket 26 is provided on the base 1, and a first screw rod 27 is provided on the first bracket 26. The threads at both ends of the first screw rod 27 are arranged opposite to each other and cooperate with the lower sliding platform 5. A first motor 28 is provided at one end of the first bracket 26, and the output end of the first motor 28 is connected to the first screw rod 27.

[0043] Specifically, the first motor 28 is started, and under the support of the first bracket 26, the first motor 28 drives the first screw rod 27 to rotate, and the first screw rod 27 cooperates with the lower sliding platform 5 through the threads at both ends, so that the lower sliding platforms 5 at both ends move inward or outward synchronously.

[0044] Please refer to Figure 2As a further implementation of the lower positioning plate 6 mechanism: a second bracket 29 is provided on the lower sliding table 5, and a second screw rod 30 is provided on the second bracket 29. The threads at both ends of the second screw rod 30 are arranged opposite to each other and cooperate with the lower positioning plate 6. A second motor 31 is provided at one end of the second bracket 29, and the output end of the second motor 31 is connected to the second screw rod 30.

[0045] Specifically, the second motor 31 is started, and under the support of the second bracket 29, the second motor 31 drives the second screw rod 30 to rotate. The second screw rod 30 cooperates with the lower positioning plate 6 through the threads at both ends, so that the lower positioning plates 6 at both ends move inward or outward synchronously to position the glass.

[0046] Please refer to Figure 3 As a further implementation of the pressure pad 10 mechanism: a first sliding plate 32 is provided between the pressure plate 4 and the pressure pad 10, the upper end of the first sliding plate 32 is slidably connected to the pressure plate 4, and the lower end is slidably connected to a second sliding plate 33, and the sliding direction between the first sliding plate 32 and the pressure plate 4 is perpendicular to the sliding direction between the first sliding plate 32 and the second sliding plate 33.

[0047] Specifically, after the pressure pad 10 absorbs the glass through the suction nozzle 11, the glass is positioned. At this time, the first sliding plate 32 slides with the pressure plate 4, and the second sliding plate 33 slides with the first sliding plate 32, so that the pressure pad 10 drives the absorbed glass to move freely and adjust the position of the glass.

[0048] In summary, when the overall device is in use or running:

[0049] When using the device, connect the device to an external power source, support each device through the cooperation of the base 1 and the support frame 2, first start the air pump 12, provide suction through the air pump 12, and under the transmission of the air pipe 13, make the suction nozzle 11 have suction, adjust the first sliding plate 32 and the second sliding plate 33, so that the pressure pad 10 is located in the center position, and then place the glass that is on the upper layer when pressing between the upper positioning plates 8 and close to the pressure pad 10, and adsorb the upper glass through the suction nozzle 11 to fix the upper glass, and then place the glass that is on the lower layer when pressing The first motor 28 is started, and the first screw rod 27 is driven to rotate by the first motor 28 under the support of the first bracket 26. The first screw rod 27 cooperates with the lower sliding platform 5 through the threads at both ends, so that the lower sliding platforms 5 at both ends move inward synchronously, driving the lower positioning plate 6 to approach the lower glass. At the same time, the second motor 31 is started, and the second motor 31 is driven to rotate by the second motor 31 under the support of the second bracket 29. The second screw rod 30 cooperates with the lower positioning plate 6 through the threads at both ends. The lower positioning plates 6 at both ends move inward synchronously and contact the glass to position the glass. When the lower positioning plates 6 move, the movement is transmitted through the linkage 9. The main body plate 21 is used as the main structure. When the lower positioning plates 6 move, the main body plate 21 is driven to move through the connecting rod 22, so that the main body plate 21 drives the upper positioning plates 8 to move through the sliding rod 23. The upper positioning plates 8 move stably in the corresponding direction through the cooperation with the upper sliding platform 7 and the pressure plate 4, contact the upper glass, and push the glass to move. The pressure pad 10 is connected to the upper sliding platform 7 and the pressure plate 4 through the first sliding plate 32 and the second sliding plate 32. The movable plate 33 is connected and fixed on the pressure plate 4, and the first sliding plate 32 can slide with the pressure plate 4, and can also slide in another direction between the second sliding plate 33 and the first sliding plate 32, so that under the thrust of the upper positioning plate 8, the pressure pad 10 drives the adsorbed glass to move freely and adjust the position of the glass. Finally, the upper positioning plate 8 and the lower positioning plate 6 are in the same position on different horizontal planes, and the lower layer of glass is limited by the lower positioning plate 6, and the upper layer of glass is limited by the upper positioning plate 8. With the cooperation of the upper positioning plate 8 and the lower positioning plate 6, the upper and lower layers of glass are aligned.

[0050] After completing the positioning of the upper and lower layers of glass, apply the adhesive glue on the lower layer of glass. According to the actual situation, the gluing operation can also be carried out before the positioning step. Under the support of the support frame 2, the pressure push rod 3 is controlled, and the pressure push rod 3 provides power to drive the pressure plate 4 to descend, thereby driving the upper glass to descend. The upper positioning plate 8 will descend together with the pressure plate 4 to ensure the positioning of the glass. At this time, the upper positioning plate 8 will drive the sliding rod 23 to move, so that the sliding rod 23 slides along the main plate 21 to adapt to the downward movement of the upper positioning plate 8. At the same time, under the action of the main plate 21, the upper positioning plate 8 and the lower fixed plate are ensured to be stable, so as to ensure the accurate position of the upper and lower glasses, so that the upper glass is accurately in contact with the lower glass, and the two glasses are pressed together under the action of the pressure plate 4, and during the pressure process During the process, the support platform 14 will support the glass and will move downward when it is under pressure. Under the restriction of the telescopic rod 15, the stability of the vertical movement is guaranteed, and the protection spring 16 will provide support and buffering for the support platform 14. When the support platform 14 moves downward under pressure, in addition to cooperating with the protection spring 16, it will also apply force to the rotating rod 20. Under the support of the protection frame 17 and the protection block, the rotating rod 20 at both ends will rotate, thereby applying pressure to the moving block 19, driving the moving block 19 to move toward the center of the protection frame 17. At this time, the protection blocks at both ends will squeeze the elastic member 18, and the elastic member 18 will further provide a buffering effect to ensure the safe pressing and avoid excessive pressure provided by the pressure push rod 3, which may cause glass breakage, and reduce the pressure burden on the equipment, thereby extending the service life of the equipment.

[0051] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A double-layer glass pressing and positioning device, comprising a base (1), a support frame (2) being provided on the base (1), a pressure push rod (3) being provided on the support frame (2), and a pressure plate (4) being provided at the output end of the pressure push rod (3), wherein: The base (1) is slidably connected at both ends with a lower sliding platform (5), the lower sliding platform (5) is slidably connected at both ends with a lower positioning plate (6), the pressure plate (4) is slidably connected at both ends with an upper sliding platform (7), the upper sliding platform (7) is slidably connected at both ends with an upper positioning plate (8), and a linkage (9) is provided between the upper positioning plate (8) and the lower positioning plate (6); A pressure pad (10) is provided at the lower end of the pressure plate (4), a suction nozzle (11) is provided inside the pressure pad (10), an air pump (12) is provided at one end of the base (1), an air pipe (13) is provided on the air pump (12), and the air pump (12) is connected to the suction nozzle (11) through the air pipe (13).

2. The double-glazed glass pressing and positioning device according to claim 1, characterized in that: A support platform (14) is provided in the middle of the base (1), a telescopic rod (15) is provided at the lower end of the support platform (14), and a protective spring (16) is provided at the outer end of the telescopic rod (15).

3. The double-glazed glass pressing and positioning device according to claim 2, characterized in that: The base (1) is provided with a protection frame (17), an elastic member (18) is provided inside the protection frame (17), moving blocks (19) are provided at both ends of the elastic member (18), a rotating rod (20) is provided at the outer end of the moving block (19), one end of the rotating rod (20) is rotatably connected to the moving block (19), and the other end is rotatably connected to the bottom of the support platform (14).

4. The double-glazed glass pressing and positioning device according to claim 1, characterized in that: The linkage (9) comprises a main body plate (21), a connecting rod (22) and a sliding rod (23); one end of the connecting rod (22) is fixedly connected to the main body plate (21), and the other end is connected to the lower positioning plate (6); one end of the sliding rod (23) is slidably connected to the main body plate (21), and the other end is connected to the upper positioning plate (8).

5. The double-glazed glass pressing and positioning device according to claim 4, characterized in that: The upper positioning plate (8) and the lower positioning plate (6) both comprise a first side plate (24) and a second side plate (25), and one end of the first side plate (24) is fixedly connected to one end of the second side plate (25) at a vertical angle.

6. The double-glazed glass pressing and positioning device according to claim 1, characterized in that: The base (1) is provided with a first bracket (26), the first bracket (26) is provided with a first screw rod (27), the threads at both ends of the first screw rod (27) are arranged opposite to each other and cooperate with the lower sliding platform (5), one end of the first bracket (26) is provided with a first motor (28), and the output end of the first motor (28) is connected to the first screw rod (27).

7. The double-glazed glass pressing and positioning device according to claim 6, characterized in that: The lower sliding platform (5) is provided with a second bracket (29), and the second bracket (29) is provided with a second screw rod (30). The threads at both ends of the second screw rod (30) are arranged opposite to each other and cooperate with the lower positioning plate (6). A second motor (31) is provided at one end of the second bracket (29), and the output end of the second motor (31) is connected to the second screw rod (30).

8. The double-glazed glass pressing and positioning device according to claim 1, characterized in that: A first sliding plate (32) is provided between the pressure plate (4) and the pressure pad (10); the upper end of the first sliding plate (32) is slidably connected to the pressure plate (4); the lower end of the first sliding plate (32) is slidably connected to the second sliding plate (33); and the sliding direction between the first sliding plate (32) and the pressure plate (4) is perpendicular to the sliding direction between the first sliding plate (32) and the second sliding plate (33).

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