Fastener with anti-skid mechanism

Abstract

The utility model belongs to the technical field of fasteners, and particularly discloses a fastener with an anti-skid mechanism, which comprises a screw body, a functional nut is sleeved on the surface of the screw body in a threaded manner, one side of the functional nut is provided with an opening, a sliding block is slidably connected inside the opening of the functional nut, and a reverse groove is arranged at the joint of the screw body and a nut cap. Threads opposite to the surface of the screw body are arranged in the reversing groove, an extruded block groove is formed in the surface of the screw body, an extruded block extending to the outer surface of the screw body is slidably connected into the extruded block groove, a transmission column groove communicated with the interior of the extruded block groove is formed in the screw body, and a transmission column is slidably connected into the transmission column groove; according to the anti-skid fastener, the anti-skid effect of the anti-skid fastener is further achieved, the situation that the fastener is loosened in the using process is reduced, the probability that equipment using the fastener is loosened at the connecting position connected through the fastener is reduced, and the equipment is damaged and economic losses are caused.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a fastener with an anti-slip mechanism. Background Art

[0002] Fasteners, also known as standard parts in the market, are mechanical components that can mechanically fix or bond two or more components together. They are characterized by a wide variety of specifications, different performances and uses, and a high degree of standardization, serialization, and generalization.

[0003] Some existing fasteners are used to fix two or more required fasteners by means of a screwdriver or other tool through the threads on their surfaces and the thread grooves of the fasteners to be fixed. However, vibrations generated by the fasteners during use may cause the fasteners to loosen and slide in the thread grooves of the fasteners. Since some existing fasteners are not equipped with anti-slip devices, if the fasteners loosen or slide due to vibration or other reasons during use, the fixed parts may fall apart, which may seriously damage the equipment of the fasteners and cause economic losses. Utility Model Content

[0004] The purpose of the utility model is to provide a fastener with an anti-slip mechanism to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fastener with an anti-slip mechanism, comprising a screw body, a functional nut is threadedly sleeved on the surface of the screw body, one side of the functional nut is an opening, a sliding block is slidably connected inside the opening of the functional nut, a reversal groove is provided at the connection between the screw body and the nut, a thread opposite to the surface of the screw body is arranged inside the reversal groove, a squeezed block groove is provided on the surface of the screw body, a squeezed block extending to the outer surface of the screw body is slidably connected inside the squeezed block groove, a transmission column groove connected to the inside of the squeezed block groove is provided inside the screw body, a transmission column is slidably connected inside the transmission column groove, a buffer block groove connected to the inside of the transmission column groove is provided inside the screw body, a buffer block groove slidably connected inside the buffer block groove, the buffer block is slidably sleeved on the surface of the transmission column, a button groove is provided on the front side of the sliding block, the button groove is T-shaped, limiting grooves are provided on the left and right sides of the sliding block, a top groove is provided inside the sliding block, which is respectively connected to the inside of the button groove and the inside of the limiting groove, and a release anti-slip device is provided inside the top groove.

[0006] Preferably, a force-bearing groove connected to the inside of the buffer block groove is formed on the surface of the screw body, and the shape of the force-bearing groove is a cross. An extrusion column is slidably connected to the inside of the force-bearing groove, and a second limit plate is fixedly connected to the upper and lower sides of the extrusion column. The surface of the second limit plate is slidably connected to the inside of the force-bearing groove, and two third springs are fixedly connected to the inside of the force-bearing groove. The side of the third spring close to the second limit plate is fixedly connected to the surface of the second limit plate, and an inclined surface is provided on the side of the extrusion column close to the buffer block.

[0007] Preferably, the shape of the squeezed block groove is a cross, the shape of the squeezed block is also a cross, the lower side of the squeezed block extending to the outer surface of the screw body is an inclined surface, the inside of the squeezed block groove is fixedly connected with a second spring, the side of the second spring close to the squeezed block is fixedly connected to the surface of the squeezed block, the shape of the transmission column groove is T-shaped, the shape of the transmission column is T-shaped, the end of the transmission column close to the squeezed block groove is provided with an inclined surface inclined to the squeezed block groove, the inside of the transmission column groove is fixedly connected with a fifth spring, the end of the fifth spring close to the transmission column is fixedly connected to the surface of the transmission column.

[0008] Preferably, a buffer groove is provided on the surface of the buffer block close to the transmission column, and one end of the transmission column close to the transmission column extends to the inside of the buffer groove, and the surface of the transmission column located inside it is slidably connected to the inside of the buffer groove, and a strong spring is fixedly connected to the inside of the buffer groove, and one end of the strong spring close to the transmission column is fixedly connected to the surface of the transmission column, and the buffer block is slidably sleeved on the surface of the transmission column through the buffer groove.

[0009] Preferably, the anti-slip release device includes a top column, the surface of the top column is slidably connected to the inside of the top groove, there are two top columns, opposite sides of the two top columns are provided with inclined surfaces, the button groove is slidably connected to the inside of the button groove, two limit plate grooves are provided inside the top groove, the front sides of the two top columns are fixedly connected to the second limit plate, the inside of the limit plate groove is fixedly connected to the first spring, the side of the first spring close to the second limit plate is fixedly connected to one side of the second limit plate, both sides of the opening of the functional nut are provided with limit slider grooves, the shape of the limit slider groove is T-shaped, the inside of the limit slider groove is slidably connected to a limit slider extending to the opening of the functional nut, the shape of the limit slider is T-shaped, the inside of the limit slider groove is fixedly connected to a fourth spring, and the side of the fourth spring close to the limit slider is fixedly connected to the surface of the limit slider.

[0010] Compared with the prior art, the beneficial effects of the utility model are: 1. For the fastener with an anti-slip mechanism, when the extrusion column slides to the extreme, the transmission column will continue to squeeze downward, and the strong spring with higher strength inside the buffer groove will absorb the corresponding extrusion, and continuously apply the corresponding extrusion to the extrusion column, so that the extrusion column continues to apply pressure to the inner wall of the thread groove, so that the device is firmly stuck in the thread groove, thereby realizing the anti-slip of the device, reducing the loosening of the fastener during use, and reducing the probability of loosening of the connection of the equipment using the fastener connected by the fastener, thereby reducing the probability of equipment damage and economic loss.

[0011] 2. The fastener with an anti-slip mechanism, when in use, pushes the inclined surfaces of the two push columns by making the button close to the top groove, so that the two push columns move back to back inside the top groove, then the opposite parts of the two push columns will push the top groove out of the top groove, at this time, the squeezed block always applies pressure to the side of the sliding block close to the screw body through the action of the second spring, then the sliding block will slide to the side away from the screw body, then the limit slider will slide into the inside of the limit groove, then one end of the squeezed block will slide out from the inside of the squeezed block groove, then the downward pressure of the buffer block on the squeeze column will be reduced to a minimum, then the pressure of one side of the squeeze column on the threaded groove will be reduced to a minimum, then the screw body can be taken out by rotating the screw body, so that the fastener can be easily released from the anti-slip function and easy to take out, thereby improving the practicability and reliability of the device, reducing the installation difficulty of the device, and increasing the installation efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of a fastener with an anti-slip mechanism according to the utility model;

[0013] Figure 2 It is a structural schematic diagram of the screw body of the utility model;

[0014] Figure 3 This is a schematic structural diagram of a cross-section of the screw body of the utility model;

[0015] Figure 4 This is a schematic structural diagram of a cross-section of a buffer block of the utility model;

[0016] Figure 5 This is a schematic diagram of the structure of the functional nut of the utility model;

[0017] Figure 6 This is a structural schematic diagram of the functional nut opening of the utility model;

[0018] Figure 7 It is a schematic structural diagram of a cross-section of the sliding block of the utility model;

[0019] Figure 8 For this utility model Figure 3A is a schematic diagram of the structure enlarged;

[0020] Fig. 9 For this utility model Figure 3 Middle B is a schematic diagram of the enlarged structure;

[0021] Fig.10 For this utility model Figure 6 Schematic diagram of the structure enlarged in C.

[0022] In the figure: 1. screw body; 2. functional nut; 3. sliding block; 4. extrusion column; 5. button; 6. reversing groove; 7. extruded block; 8. extruded block groove; 9. first spring; 10. transmission column; 11. transmission column groove; 12. limit slider groove; 13. buffer block; 14. buffer block groove; 15. force groove; 16. second limit plate; 17. buffer groove; 18. strong spring; 19. limit groove; 20. top groove; 21. top column; 22. button groove; 23. limit slider; 24. limit plate groove; 25. second spring; 26. third spring; 27. fourth spring; 28. fifth spring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-10The utility model provides a technical solution: a fastener with an anti-slip mechanism, including a screw body 1, a functional nut 2 is threadedly sleeved on the surface of the screw body 1, one side of the functional nut 2 is an opening, and a sliding block 3 is slidably connected to the opening of the functional nut 2, and a reversal groove 6 is provided at the connection between the screw body 1 and the nut, and a thread opposite to the surface of the screw body 1 is arranged inside the reversal groove 6. When the screw body 1 is screwed into a fixed object for a long time, the surface of the screw body 1 may rust, so that when the screw body 1 is taken out, it is difficult to take it out from the inside of the fixed object. If the nut is turned forcefully, it may cause the screw to strip, and at this time, tapping is required. The function of the reversal groove 6 replaces this step, and the surface of the screw body 1 is provided with an extrusion block groove 8. The block groove 8 is internally slidably connected with an squeezed block 7 extending to the outer surface of the screw body 1, the screw body 1 is internally provided with a transmission column groove 11 connected with the interior of the squeezed block groove 8, the transmission column groove 11 is internally slidably connected with a transmission column 10, the screw body 1 is internally provided with a buffer block groove 14 connected with the interior of the transmission column groove 11, the buffer block groove 14 is internally slidably connected with a buffer block 13, the buffer block 13 is slidably sleeved on the surface of the transmission column 10, the front side of the sliding block 3 is provided with a button groove 22, the shape of the button groove 22 is T-shaped, the left and right sides of the sliding block 3 are provided with limit grooves 19, the sliding block 3 is internally provided with a top groove 20 respectively connected with the interior of the button groove 22 and the interior of the limit groove 19, and the top groove 20 is provided with a release anti-slip device.

[0025] Furthermore, a force-bearing groove 15 connected to the interior of the buffer block groove 14 is provided on the surface of the screw body 1. The force-bearing groove 15 is in the shape of a cross. The interior of the force-bearing groove 15 is slidably connected with an extrusion column 4 that can extend to the outside of the screw body 1. The upper and lower sides of the extrusion column 4 are fixedly connected with a second limit plate 16. The surface of the second limit plate 16 is slidably connected to the interior of the force-bearing groove 15. Two third springs 26 are fixedly connected to the interior of the force-bearing groove 15. The side of the third spring 26 close to the second limit plate 16 is fixedly connected to the surface of the second limit plate 16. The side of the extrusion column 4 close to the buffer block 13 is provided with an inclined surface.

[0026] Furthermore, the shape of the squeezed block groove 8 is also a cross shape, the shape of the squeezed block 7 is a cross shape, the squeezed block 7 extends to the lower side of the outer surface of the screw body 1 is an inclined surface, and the interior of the squeezed block groove 8 is fixedly connected to a second spring 25, and the side of the second spring 25 close to the squeezed block 7 is fixedly connected to the surface of the squeezed block 7, and the second spring 25 can be compressed and reset by squeezing the squeezed block 7.

[0027] Furthermore, the shape of the transmission column groove 11 is T-shaped, the shape of the transmission column 10 is T-shaped, and the end of the transmission column 10 close to the squeezed block groove 8 is provided with an inclined surface inclined toward the squeezed block groove 8. The interior of the transmission column groove 11 is fixedly connected to the fifth spring 28, and the end of the fifth spring 28 close to the transmission column 10 is fixedly connected to the surface of the transmission column 10.

[0028] Furthermore, a buffer groove 17 is provided on the surface of the buffer block 13 close to the transmission column 10, and one end of the transmission column 10 close to the transmission column 10 extends to the inside of the buffer groove 17, and the surface of the transmission column 10 located therein is slidably connected to the inside of the buffer groove 17, and a strong spring 18 is fixedly connected to the inside of the buffer groove 17. The strong spring 18 is a spring with relatively high strength, and one end of the strong spring 18 close to the transmission column 10 is fixedly connected to the surface of the transmission column 10, and the buffer block 13 is slidably sleeved on the surface of the transmission column 10 through the buffer groove 17.

[0029] When the screw body 1 rotates toward the thread groove in the object to be fixed, the functional nut 2 will first press against the surface of the object, and then rotate synchronously with the screw body 1 into the thread groove of the object. When the screw body 1 is completely rotated into the object, the functional nut 2 will squeeze the inclined surface of the squeezed block 7, so that the squeezed block 7 slides into the inside of the squeezed block groove 8. When the squeezed block 7 slides into the inside of the squeezed block groove 8, the functional nut 2 will be sleeved on the outside of the squeezed block 7, so that the squeezed block 7 cannot rebound by the second spring 25. At this time, the squeezed block 7 will squeeze the inclined surface of the transmission column 10 against one side of the transmission column groove 11, so that the transmission column 10 slides downward inside the transmission column groove 11. The transmission column 10 will squeeze the buffer block 13 downward, and the buffer block 13 will squeeze the inclined surface of the extrusion column 4 set inside the force groove 15, so that the extrusion column 4 moves to the outside of the force groove 15, and one side of the extrusion column 4 will squeeze the inner wall of the thread groove of the object. Since the screw body 1 is in close contact with the thread groove, when the extrusion column 4 slides to the extreme, the transmission column 10 will continue to squeeze downward, and the strong spring 18 with higher strength in the buffer groove 17 will absorb the corresponding squeezing, and continuously apply the corresponding squeezing to the extrusion column 4, so that the extrusion column 4 continues to press the inner wall of the thread groove, so that the device is firmly stuck in the thread groove, thereby achieving the anti-slip of the device.

[0030] Furthermore, the anti-slip release device includes a top column 21, the surface of the top column 21 is slidably connected to the inside of the top groove 20, there are two top columns 21, and the opposite sides of the two top columns 21 are provided with inclined surfaces. The button groove 22 is internally slidably connected to a button 5 that can slide into the inside of the top groove 20, and the shape of the button 5 is T-shaped. Two limiting plate grooves 24 are provided inside the top groove 20, and the front sides of the two top columns 21 are fixedly connected to the same second limiting plate 16, and the inside of the limiting plate groove 24 is fixedly connected to a first spring 9, and the side of the first spring 9 close to the second limiting plate 16 is fixedly connected to one side of the second limiting plate 16, squeezing the second limiting plate 16 can compress and reset the first spring 9. Limiting slider grooves 12 are provided on both sides of the opening of the functional nut 2. The limiting slider groove 12 is in a T-shape. The limiting slider groove 12 is internally slidably connected with a limiting slider 23 extending to the opening of the functional nut 2. The limiting slider 23 is in a T-shape. The limiting slider groove 12 is internally fixedly connected with a fourth spring 27. The side of the fourth spring 27 close to the limiting slider 23 is fixedly connected to the surface of the limiting slider 23. The fourth spring 27 can be compressed and reset by squeezing the limiting slider 23. The surface of the limiting slider 23 is internally slidably connected to the limiting groove 19.

[0031] When the sliding block 3 rotates to the nut position on the surface of the screw body 1, the sliding block 3 also rotates. At this time, the sliding block 3 acts as a gasket for the screw body 1 to prevent the screw body 1 from loosening. At this time, the side of the sliding block 3 close to the screw body 1 will abut against the squeezed block 7, so that the squeezed block 7 is inside the squeezed block groove 8 and cannot come out. When the screw body 1 needs to be taken out from the threaded groove of the fixing part, the operator needs to press the button 5 so that the side of the button 5 close to the top groove 20 pushes the inclined surfaces of the two top columns 21, so that the two top columns 21 move back to back inside the top groove 20, then The top groove 20 is pushed out from the inside of the top groove 20 at the opposite sides of the two top columns 21. At this time, the squeezed block 7 always applies pressure to the side of the sliding block 3 close to the screw body 1 through the action of the second spring 25. At this time, the sliding block 3 will slide to the side away from the screw body 1, and the limiting slider 23 will slide into the inside of the limiting groove 19, and one end of the squeezed block 7 will slide out from the inside of the squeezed block groove 8, and the downward pressure of the buffer block 13 on the squeezing column 4 will be reduced to a minimum, and the pressure of one side of the squeezing column 4 on the threaded groove will be reduced to a minimum, and the screw body 1 can be taken out by rotating the screw body 1.

[0032] Working principle: When the fastener with anti-slip mechanism is in use, when the screw body 1 rotates into the thread groove of the object to be fixed, the functional nut 2 will first press against the surface of the object, and then rotate synchronously with the screw body 1 into the thread groove of the object. When the screw body 1 is completely rotated into the object, the functional nut 2 will squeeze the inclined surface of the squeezed block 7, so that the squeezed block 7 slides into the inside of the squeezed block groove 8. When the squeezed block 7 slides into the inside of the squeezed block groove 8, the functional nut 2 will be sleeved on the outside of the squeezed block 7, so that the squeezed block 7 cannot rebound through the second spring 25. At this time, the squeezed block 7 will squeeze one side of the transmission column groove 11. The inclined surface of the transmission column 10 is pressed to make the transmission column 10 slide downward inside the transmission column groove 11, and the transmission column 10 will squeeze the buffer block 13 downward, and the buffer block 13 will squeeze the inclined surface of the extrusion column 4 set inside the force groove 15, so that the extrusion column 4 moves to the outside of the force groove 15, and one side of the extrusion column 4 will squeeze the inner wall of the thread groove of the object. Since the screw body 1 is closely fitted with the thread groove, when the extrusion column 4 slides to the extreme, the transmission column 10 will continue to squeeze downward at this time, and the strong spring 18 with higher strength in the buffer groove 17 will absorb the corresponding extrusion, and continuously apply the corresponding extrusion to the extrusion column 4, so that the extrusion The pressure column 4 continuously applies pressure to the inner wall of the thread groove so that the device is firmly stuck in the thread groove, thereby realizing the anti-skid of the device. When the sliding block 3 rotates to the nut position on the surface of the screw body 1, the sliding block 3 also rotates. At this time, the sliding block 3 acts as a gasket for the screw body 1 to prevent the screw body 1 from loosening. At this time, the side of the sliding block 3 close to the screw body 1 will press against the squeezed block 7, so that the squeezed block 7 is inside the squeezed block groove 8 and cannot come out. When the screw body 1 needs to be removed from the thread groove of the fixing part, the operator needs to press the button 5 so that the side of the button 5 close to the top groove 20 pushes the inclined surfaces of the two top columns 21. The two top columns 21 are made to move opposite to each other inside the top groove 20, and the opposite parts of the two top columns 21 will be pushed out of the top groove 20 from the inside of the top groove 20. At this time, the squeezed block 7 always applies pressure to the side of the sliding block 3 close to the screw body 1 through the action of the second spring 25. At this time, the sliding block 3 will slide to the side away from the screw body 1, and the limiting slider 23 will slide into the inside of the limiting groove 19, and one end of the squeezed block 7 will slide out from the inside of the squeezed block groove 8, and the downward pressure of the buffer block 13 on the squeezing column 4 will be reduced to a minimum, and the pressure of one side of the squeezing column 4 on the threaded groove will be reduced to a minimum, and the screw body 1 can be taken out by rotating the screw body 1.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fastener with an anti-slip mechanism, comprising a screw body (1), characterized in that: The surface of the screw body (1) is threadedly sleeved with a functional nut (2), one side of the functional nut (2) is open, and a sliding block (3) is slidably connected inside the opening of the functional nut (2), a reversing groove (6) is provided at the connection between the screw body (1) and the nut, and a thread opposite to the surface of the screw body (1) is arranged inside the reversing groove (6), a squeezed block groove (8) is provided on the surface of the screw body (1), and a squeezed block (7) extending to the outer surface of the screw body (1) is slidably connected inside the squeezed block groove (8), and a transmission column groove (11) is provided inside the screw body (1) and is connected to the inside of the squeezed block groove (8), and the inside of the transmission column groove (11) is slidably connected to the outside of the screw body (1). A transmission column (10) is connected, a buffer block groove (14) is provided inside the screw body (1) and is connected to the inside of the transmission column groove (11), a buffer block (13) is slidably connected inside the buffer block groove (14), and the buffer block (13) is slidably sleeved on the surface of the transmission column (10), a button groove (22) is provided on the front side of the sliding block (3), and the button groove (22) is in a T-shape, and limit grooves (19) are provided on both left and right sides of the sliding block (3), and a top groove (20) is provided inside the sliding block (3) and is connected to the inside of the button groove (22) and the inside of the limit groove (19), respectively, and a release anti-slip device is provided inside the top groove (20).

2. A fastener with an anti-slip mechanism according to claim 1, characterized in that: The surface of the screw body (1) is provided with a stress-bearing groove (15) which is connected to the inside of the buffer block groove (14). The stress-bearing groove (15) is in a cross shape. The inside of the stress-bearing groove (15) is slidably connected to an extrusion column (4). The upper and lower sides of the extrusion column (4) are fixedly connected to a second limit plate (16). The surface of the second limit plate (16) is slidably connected to the inside of the stress-bearing groove (15). Two third springs (26) are fixedly connected to the inside of the stress-bearing groove (15). The side of the third spring (26) close to the second limit plate (16) is fixedly connected to the surface of the second limit plate (16). The side of the extrusion column (4) close to the buffer block (13) is provided with an inclined surface.

3. The fastener with an anti-slip mechanism according to claim 1, characterized in that: The squeezed block groove (8) is in the shape of a cross, and the squeezed block (7) is also in the shape of a cross. The lower side of the squeezed block (7) extending to the outer surface of the screw body (1) is an inclined surface. A second spring (25) is fixedly connected to the interior of the squeezed block groove (8), and the second spring (25) is fixedly connected to the surface of the squeezed block (7) on a side close to the squeezed block (7).

4. The fastener with an anti-slip mechanism according to claim 1, characterized in that: The transmission column groove (11) is in a T-shape, the transmission column (10) is in a T-shape, one end of the transmission column (10) close to the squeezed block groove (8) is provided with an inclined surface inclined toward the squeezed block groove (8), a fifth spring (28) is fixedly connected inside the transmission column groove (11), and one end of the fifth spring (28) close to the transmission column (10) is fixedly connected to the surface of the transmission column (10).

5. The fastener with an anti-slip mechanism according to claim 1, characterized in that: A buffer groove (17) is provided on the surface of the buffer block (13) close to the transmission column (10); one end of the transmission column (10) close to the transmission column (10) extends to the inside of the buffer groove (17); the surface of the transmission column (10) located inside the buffer groove (17) is slidably connected to the inside of the buffer groove (17); a strong spring (18) is fixedly connected to the inside of the buffer groove (17); one end of the strong spring (18) close to the transmission column (10) is fixedly connected to the surface of the transmission column (10); and the buffer block (13) is slidably sleeved on the surface of the transmission column (10) through the buffer groove (17).

6. The fastener with an anti-slip mechanism according to claim 1, characterized in that: The anti-slip release device comprises a top column (21), the surface of the top column (21) is slidably connected to the inside of the top groove (20), the number of the top columns (21) is two, the opposite sides of the two top columns (21) are provided with inclined surfaces, the inside of the button groove (22) is slidably connected to a button (5), the inside of the top groove (20) is provided with two limiting plate grooves (24), the front sides of the two top columns (21) are fixedly connected to the second limiting plate (16), the inside of the limiting plate groove (24) is fixedly connected to the first spring (9), and the first spring (9) is close to the second limiting plate (16). One side of the functional nut (2) is fixedly connected to one side of the second limit plate (16), and both sides of the opening of the functional nut (2) are provided with limit slider grooves (12), the limit slider groove (12) is in a T-shape, and the inside of the limit slider groove (12) is slidably connected to a limit slider (23) extending to the opening of the functional nut (2), the limit slider (23) is in a T-shape, and the inside of the limit slider groove (12) is fixedly connected to a fourth spring (27), and the side of the fourth spring (27) close to the limit slider (23) is fixedly connected to the surface of the limit slider (23).

Images