Electromagnetic stable adsorption structure-based pressure-sensitive resistor welding tooling

Abstract

The present application relates to pressure sensitive resistance welding tool technical field, especially to a kind of pressure sensitive resistance welding tool based on electromagnetic stable adsorption structure, including base, rotationally connected with rotary seat being arranged above base, electromagnetic adsorption seat is fixedly connected with being arranged in rotary seat middle part, top frame is fixedly connected with being arranged on rotary seat, laser welding equipment is installed on top frame, moving ring is arranged on top frame, a plurality of centering mechanisms are rotationally connected with being arranged on top frame, wiping plate is slidably matched with being arranged on rotary seat one end top, transmission mechanism is slidably matched with being arranged on rotary seat one end bottom, by multiple adjustable position electromagnet of annular structure being arranged in electromagnetic adsorption seat, can be accurately adjusted according to different sizes annular pressure sensitive resistance, to annular pressure sensitive resistance is carried out electromagnetic stable adsorption welding, compared with traditional clamping mode, reduce the physical contact to component, improve production efficiency, reduce component damage, improve welding quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pressure-sensitive resistance welding tooling, in particular to a pressure-sensitive resistance welding tooling based on an electromagnetic stable adsorption structure. BACKGROUND

[0002] The pressure-sensitive resistance welding tooling is a tool or device specially designed for welding pressure-sensitive resistors (such as ring-shaped pressure-sensitive resistors). Pressure-sensitive resistors are commonly used for circuit protection and voltage stabilization, and have important applications in electronic devices, so their welding precision requirements are high. The design and use of the welding tooling are crucial to ensuring welding quality and improving production efficiency.

[0003] The prior art document with publication number CN216298383U provides a chip welding tooling for hot pressure-sensitive resistor processing. By using the slide block, slide groove, and spring accessories, the positioning rod can be driven to move inside the positioning groove. The positioning rod can be separated from the positioning groove and cooperate with the shaft to rotate the placement plate, which can adjust the angle of the placement plate and the internal processing workpiece, thereby improving the processing efficiency. When the positioning rod is returned by the spring, it can realize the positioning and fixing effect of the placement plate.

[0004] In use, the existing technology uses clamping components to achieve the positioning and fixing of the pressure-sensitive resistor. However, when clamping and welding the ring-shaped pressure-sensitive resistor, the material of the ring-shaped pressure-sensitive resistor is relatively fragile. If the clamping force is too large or uneven, it may cause the element to break or be damaged. If the clamping force of the clamp is not enough, the ring-shaped pressure-sensitive resistor may shift or loosen during the welding process, affecting the welding quality. In addition, during clamping and welding, the welding position may be blocked, affecting the welding efficiency.

[0005] In summary, there is a lack of electromagnetic adsorption and fixing welding technology for ring-shaped pressure-sensitive resistors in the prior art. SUMMARY

[0006] The purpose of the present application is to solve the shortcomings in the background art and provide a pressure-sensitive resistance welding tooling based on an electromagnetic stable adsorption structure.

[0007] To achieve the above purpose, the technical solution adopted by the present application is as follows: a pressure-sensitive resistance welding tooling based on an electromagnetic stable adsorption structure, comprising a base, a rotating seat is rotatably connected above the base, an electromagnetic adsorption seat is fixedly connected in the middle of the rotating seat, a top frame is fixedly connected on the rotating seat, a laser welding device is installed on the top frame, a moving ring is provided on the top frame, a plurality of centering mechanisms are rotatably connected on the top frame, a wiping plate is slidably connected on the upper end of the rotating seat, and a transmission mechanism is slidably connected on the lower end of the rotating seat.

[0008] Preferably, one side of the base is provided with a positioning groove, a positioning block is movably inserted into the positioning groove, and the positioning block is fixedly connected with a receiving box at one end.

[0009] Preferably, a hydraulic rod is rotatably connected to the lower side of the rotating seat, the other end of the hydraulic rod is rotatably connected with the base, and two symmetrical grooves are formed in one side of the rotating seat.

[0010] Preferably, a ring-shaped pressure-sensitive resistor is placed on the electromagnetic adsorption seat, a gear disc is rotatably connected to the inner wall of the electromagnetic adsorption seat, one end of the gear disc extends to the outside through the inner wall of the electromagnetic adsorption seat and is fixedly connected with a motor, the motor is fixedly connected with the electromagnetic adsorption seat, a plurality of threaded rods are rotatably connected to the inner wall of the electromagnetic adsorption seat, one end of each threaded rod is fixedly connected with a transmission wheel, the transmission wheel is in meshing transmission with the gear disc, a connecting block is threadedly connected to the outer wall of the threaded rod, an electromagnet is fixedly connected to the connecting block, and the top end of the electromagnet is in sliding contact with the inner wall of the electromagnetic adsorption seat.

[0011] Preferably, an electric push rod is fixedly connected to the bottom of the moving ring, one end of the electric push rod is fixedly connected with the top frame, and a plurality of adjusting racks are fixedly connected to the bottom of the moving ring in a ring-shaped structure.

[0012] Preferably, the centering mechanism comprises a rotating rod, the top end of the rotating rod is rotatably connected with the top frame, an adjusting wheel is fixedly connected to the top end of the rotating rod, the adjusting wheel is in meshing transmission with the adjusting rack, a push rod is slidingly fitted to the inner wall of the bottom end of the rotating rod, an inclined surface is formed on one side of the push rod, the push rod is in sliding contact with the rotating seat and the electromagnetic adsorption seat, a spring is fixedly connected to the inner end of the push rod, and the other end of the spring is fixedly connected with the inner wall of the rotating rod.

[0013] Preferably, a sponge pad is fixedly connected to the lower surface of the wiping plate, two push rod groups are rotatably connected to the upper surface of the wiping plate, an L-shaped rod is fixedly connected to the other end of each push rod group, and the L-shaped rod is rotatably connected with the rotating seat.

[0014] Preferably, the transmission mechanism comprises a triangular block, the triangular block is slidingly fitted with the rotating seat, a contact rod is fixedly connected to one side of the triangular block, and one end of the contact rod is movably connected with one side of the base.

[0015] Preferably, the triangular block is provided with a guide rod on both sides in sliding contact, the guide rod is fixedly connected with a connecting rod, the other end of the connecting rod is rotatably connected with the bottom end of the L-shaped rod, a sliding block is rotatably connected to the connecting rod, the sliding block is in sliding fit with the inner wall of the sliding groove, a tension spring is fixedly connected to one side of the sliding block, and the other end of the tension spring is fixedly connected with the inner wall of the sliding groove.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] By arranging multiple adjustable position electromagnets in a ring structure in the electromagnetic adsorption seat, the ring-shaped pressure sensitive resistor can be accurately adjusted according to different sizes, so that the ring-shaped pressure sensitive resistor can be electromagnetically stably adsorbed and welded, and the welding process can be accurately positioned, flexibly adjusted and efficiently stabilized. Compared with the traditional clamping method, the physical contact with the element is reduced, the production efficiency is improved, the element damage is reduced, and the welding quality is improved.

[0018] By arranging a rotatable rotating seat and a centering mechanism, the ring-shaped pressure sensitive resistor can be quickly unloaded and quickly positioned for electromagnetic adsorption, which can greatly improve the production efficiency, improve the welding quality, and enhance the automation degree of the production line. It has flexible adaptability and can adapt to the size of the ring-shaped pressure sensitive resistor. Not only reduces manual operation, reduces operation risk and cost, but also effectively improves the positioning accuracy and welding stability of the element, especially suitable for large quantities and high precision production requirements.

[0019] By arranging a wiping plate and a transmission mechanism, the wiping plate can be moved by the transmission mechanism while the rotating seat is rotating for unloading, realizing automatic cleaning of the electromagnetic adsorption seat, effectively ensuring the stability of the electromagnetic adsorption force, reducing the influence of surface pollution on the adsorption effect, and improving the welding quality and production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a whole structure schematic view of the pressure sensitive resistor welding tool based on the electromagnetic stable adsorption structure.

[0021] Figure 2 It is an expanded schematic view of the base structure of the pressure sensitive resistor welding tool based on the electromagnetic stable adsorption structure.

[0022] Figure 3 It is a rotating seat structure schematic view of the pressure sensitive resistor welding tool based on the electromagnetic stable adsorption structure.

[0023] Figure 4 It is a local sectional view schematic view of the electromagnetic adsorption seat structure of the pressure sensitive resistor welding tool based on the electromagnetic stable adsorption structure.

[0024] Figure 5 This is a schematic diagram of the movable ring structure of a varistor welding tool based on an electromagnetic stable adsorption structure according to the present invention;

[0025] Figure 6 It is a partial cross-sectional expanded schematic diagram of the centering mechanism structure of a varistor welding tool based on an electromagnetic stable adsorption structure according to the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of a wiping plate of a varistor welding tool based on an electromagnetic stable adsorption structure according to the present invention;

[0027] Figure 8 The figure is a schematic diagram of the transmission mechanism structure of a varistor welding tool based on an electromagnetic stable adsorption structure according to the present invention.

[0028] 1. Base; 2. Rotating seat; 3. Electromagnetic adsorption seat; 4. Top frame; 5. Laser welding equipment; 6. Moving ring; 7. Centering mechanism; 8. Wiping plate; 9. Transmission mechanism; 101. Positioning groove; 102. Positioning block; 103. Material receiving box; 201. Hydraulic rod; 202. Slide; 301. Ring varistor; 302. Toothed disc; 303. Motor; 304. Threaded rod; 305. Transmission wheel; 306. Connecting block; 307. Electromagnet; 601. Electric push rod; 602. Adjusting rack; 701. Rotating rod; 702. Adjusting wheel; 703. Push rod; 704. Spring; 801. Push rod group; 802. L-shaped rod; 901. Triangular block; 902. Contact rod; 903. Guide rod; 904. Connecting rod; 905. Slider; 906. Tension spring. DETAILED DESCRIPTION

[0029] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0030] like Figures 1-8 The shown embodiment is a varistor welding tool based on an electromagnetic stable adsorption structure, comprising a base 1, a rotating seat 2 is rotatably connected above the base 1, an electromagnetic adsorption seat 3 is fixedly connected to the middle of the rotating seat 2, a top frame 4 is fixedly connected to the rotating seat 2, a laser welding device 5 is installed on the top frame 4, a moving ring 6 is provided on the top frame 4, and a plurality of centering mechanisms 7 are rotatably connected to the top frame 4, a wiping plate 8 is slidably provided above one end of the rotating seat 2, and a transmission mechanism 9 is slidably provided below one end of the rotating seat 2.

[0031] like Figure 2As shown, the base 1 side is provided with a positioning groove 101, the positioning groove 101 is movably inserted with a positioning block 102, and the positioning block 102 is fixedly connected with a receiving box 103. The positioning groove 101 facilitates the limiting and fixing of the receiving box 103.

[0032] As shown in the figure, Figure 3 As shown, the lower side of the rotating seat 2 is rotatably connected with a hydraulic rod 201, the other end of the hydraulic rod 201 is rotatably connected with the base 1, and the side of the rotating seat 2 is symmetrically provided with two sliding grooves 202.

[0033] As shown in the figure, Figure 4 As shown, the electromagnetic adsorption seat 3 is placed with a ring-shaped pressure sensitive resistor 301, the inner wall of the electromagnetic adsorption seat 3 is rotatably connected with a gear disc 302, one end of the gear disc 302 extends to the outside through the inner wall of the electromagnetic adsorption seat 3 and is fixedly connected with a motor 303, the motor 303 is fixedly connected with the electromagnetic adsorption seat 3, the inner wall of the electromagnetic adsorption seat 3 is rotatably connected with a plurality of threaded rods 304, one end of the threaded rod 304 is fixedly connected with a transmission wheel 305, the transmission wheel 305 is meshingly connected with the gear disc 302, the outer wall of the threaded rod 304 is threadedly connected with a connecting block 306, the connecting block 306 is fixedly connected with an electromagnet 307, and the top end of the electromagnet 307 is slidably connected with the inner wall of the electromagnetic adsorption seat 3. The model of the electromagnet 307 is PA-2012, which can provide uniform and stable adsorption force and is suitable for use in welding fixtures. The motor 303 drives the connected gear disc 302 to rotate, so that the gear disc 302 drives the threaded rod 304 connected with the transmission wheel 305 to rotate, at this time the threaded rod 304 drives the connecting block 306 to move, so that the electromagnet 307 on the connecting block 306 moves to a position corresponding to the size of the ring-shaped pressure sensitive resistor 301.

[0034] By arranging a plurality of electromagnets 307 with adjustable positions in the electromagnetic adsorption seat 3 in a ring-shaped structure, the ring-shaped pressure sensitive resistor 301 can be accurately adjusted according to different sizes, so that the ring-shaped pressure sensitive resistor 301 is electromagnetically stably adsorbed for welding, which can realize accurate positioning, flexible adjustment, efficient and stable welding process, compared with the traditional clamping method, reduces the physical contact with the element, improves the production efficiency, reduces the damage to the element, and improves the welding quality.

[0035] As shown in the figure, Figure 5 As shown, the bottom of the moving ring 6 is fixedly connected with an electric push rod 601, one end of the electric push rod 601 is fixedly connected with the top frame 4, and the bottom of the moving ring 6 is fixedly connected with a plurality of adjusting racks 602 in a ring-shaped structure, and the adjusting racks 602 are slidably connected with the top frame 4. The electric push rod 601 drives the adjusting rack 602 to move upwards, at this time the adjusting rack 602 drives the rotating rod 701 connected with the adjusting wheel 702 to rotate.

[0036] AsFigure 6 As shown, the centering mechanism 7 includes a rotating rod 701, the top end of which is rotationally connected to the top frame 4, and the top end of which is fixedly connected to an adjusting wheel 702, which is in meshing transmission with the adjusting rack 602, and the bottom end of the rotating rod 701 is slidingly matched with a push rod 703, one side of which is provided with an inclined surface, and the push rod 703 is slidingly in contact with the rotating seat 2 and the electromagnetic adsorption seat 3, and the inner end of the push rod 703 is fixedly connected to a spring 704, and the other end of the spring 704 is fixedly connected to the inner wall of the rotating rod 701. The side of the push rod 703 is provided with an inclined surface, so that when it rotationally contacts the rotating seat 2, it can be automatically retracted. The rotating rod 701 rotates, so that the rotating rod 701 can drive the push rod 703 to rotate, and then under the action of the spring 704, the outer end of the push rod 703 always remains in contact with the rotating seat 2 and the electromagnetic adsorption seat 3, and the plurality of push rods 703 will push the annular pressure-sensitive resistor 301 to move to the center of the electromagnetic adsorption seat 3.

[0037] As shown, Figure 7 The lower surface of the wiping plate 8 is fixedly connected to a sponge pad, and the upper surface of the wiping plate 8 is rotationally connected to two push rod groups 801, and the other end of each push rod group 801 is fixedly connected to an L-shaped rod 802, and the L-shaped rod 802 is rotationally connected to the rotating seat 2. When the rotating seat 2 rotates, the contact rod 902 does not contact the base 1, and under the action of the tension spring 906, the sliding block 905 is driven to move, so that the sliding block 905 drives the connecting rod 904, so that the connecting rod 904 drives the push rod group 801 connected to the L-shaped rod 802 to rotate, so that the push rod group 801 drives the wiping plate 8 to move.

[0038] As shown, Figure 8 The transmission mechanism 9 includes a triangular block 901, which is slidingly matched with the rotating seat 2, and one side of the triangular block 901 is fixedly connected to a contact rod 902, and one end of the contact rod 902 is movably in contact with one side of the base 1.

[0039] The two sides of the triangular block 901 are slidingly in contact with guide rods 903, and the connecting rod 904 is fixedly connected to the guide rods 903, and the other end of the connecting rod 904 is rotationally connected to the bottom end of the L-shaped rod 802, and the sliding block 905 is rotationally connected to the connecting rod 904, and the sliding block 905 is slidingly matched with the inner wall of the sliding groove 202, and the sliding block 905 is fixedly connected to a tension spring 906 on one side, and the other end of the tension spring 906 is fixedly connected to the inner wall of the sliding groove 202. When the rotating seat 2 rotates and resets, the contact rod 902 contacts the base 1, thereby pushing the triangular block 901 connected to the contact rod 902 to move upward, so that the inclined surface of the triangular block 901 contacts the guide rod 903, thereby pushing the sliding block 905 connected to the guide rod 903 to move, thereby driving the wiping plate 8 to reset through the connecting rod 904.

[0040] Working principle: when the ring-shaped pressure-sensitive resistor 301 needs to be welded, first adjust the position of the electromagnet 307 according to the size of the ring-shaped pressure-sensitive resistor 301, drive the connected gear disc 302 to rotate by using the motor 303, so that the gear disc 302 drives the transmission wheel 305 connected with the threaded rod 304 to rotate, at this time the threaded rod 304 will drive the connecting block 306 to move, so that the electromagnet 307 on the connecting block 306 moves to the position corresponding to the size of the ring-shaped pressure-sensitive resistor 301;

[0041] Then place the ring-shaped pressure-sensitive resistor 301 on the electromagnetic adsorption seat 3, and use the electric push rod 601 to drive the adjusting rack 602 to move upwards, at this time the adjusting rack 602 will drive the rotating rod 701 connected with the adjusting wheel 702 to rotate, so that the rotating rod 701 can drive the push rod 703 to rotate, then under the action of the spring 704, the outer end of the push rod 703 always keeps in contact with the rotating seat 2 and the electromagnetic adsorption seat 3, multiple push rods 703 will push the ring-shaped pressure-sensitive resistor 301 to move to the center of the electromagnetic adsorption seat 3, then generate a suitable magnetic field by the electromagnet 307 to adsorb and fix the ring-shaped pressure-sensitive resistor 301, then reverse the rotating rod 701 to move away, and use the laser welding equipment 5 to weld the ring-shaped pressure-sensitive resistor 301;

[0042] After welding, use the hydraulic rod 201 to drive the rotating seat 2 to rotate, so that the ring-shaped pressure-sensitive resistor 301 on the rotating seat 2 can slide into the receiving box 103 for collection;

[0043] At the same time, when the rotating seat 2 rotates, the contact rod 902 does not contact the base 1, under the action of the tension spring 906, it will drive the sliding block 905 to move, so that the sliding block 905 can drive the connecting rod 904, so that the connecting rod 904 drives the push rod group 801 connected with the L-shaped rod 802 to rotate, so that the push rod group 801 drives the wiping plate 8 to move and automatically clean the surface of the electromagnetic adsorption seat 3, when the rotating seat 2 rotates and resets, the contact rod 902 contacts the base 1, so as to push the triangular block 901 connected with the contact rod 902 to move upwards, so that the inclined surface of the triangular block 901 contacts the guide rod 903, so as to push the sliding block 905 connected with the guide rod 903 to move, so as to reset the wiping plate 8 through the connecting rod 904.

[0044] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other present or future devices perform the same function under a different name. It must be noted that, as used in the specification and the appended claims, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" can include a plurality of such components. In this specification and in the claims, the term "when" should be understood to mean "whereupon" or "upon" when used in contexts describing the sequential order of events, and "whenever" when used in contexts describing the sequential order of events or circumstances. The terms "comprises" and / or "comprising," or "includes" and / or "including" when used in this specification and in the following claims are used open- ended, meaning that they include the elements that follow, but not to the exclusion of other elements. The terms "coupled" and "coupling" mean to be directly or indirectly connected physically or logically, or to be directly or indirectly in communication, whether electrically, mechanically, optically, or otherwise.

[0045] The foregoing description of the preferred embodiment of the application has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the application to the precise form disclosed. Many modifications and variations are possible in light of this disclosure. It is intended that the scope of the application be limited not with this detailed description, but rather by the claims appended hereto.

Claims

1. A varistor welding tool based on an electromagnetically stable adsorption structure, comprising a base (1), characterized in that: A rotating seat (2) is rotatably connected to the top of the base (1), an electromagnetic adsorption seat (3) is fixedly connected to the middle of the rotating seat (2), an annular varistor (301) is placed on the electromagnetic adsorption seat (3), a toothed disc (302) is rotatably connected to the inner wall of the electromagnetic adsorption seat (3), one end of the toothed disc (302) passes through the inner wall of the electromagnetic adsorption seat (3) and extends to the outside and is fixedly connected to a motor (303), the motor (303) is fixedly connected to the electromagnetic adsorption seat (3), and a plurality of threaded rods (304) are rotatably connected to the inner wall of the electromagnetic adsorption seat (3). One end of (304) is fixedly connected with a transmission wheel (305), and the transmission wheel (305) is meshed with the gear disc (302) for transmission. The outer wall of the threaded rod (304) is threadedly connected with a connection block (306), and the connection block (306) is fixedly connected with an electromagnet (307), and the top of the electromagnet (307) is in sliding contact with the inner wall of the electromagnetic adsorption seat (3). The rotating seat (2) is fixedly connected with a top frame (4), and a laser welding device (5) is installed on the top frame (4). A moving ring (6) is provided on the top frame (4), and the bottom of the moving ring (6) is fixedly connected to the top frame (4). An electric push rod (601) is provided, one end of the electric push rod (601) is fixedly connected to the top frame (4), the bottom of the movable ring (6) is annularly structured and fixedly connected with a plurality of adjustment racks (602), the adjustment racks (602) and the top frame (4) are arranged to slide through, and a plurality of centering mechanisms (7) are rotatably connected to the top frame (4), and the centering mechanism (7) includes a rotating rod (701), the top end of the rotating rod (701) is rotatably connected to the top frame (4), and the top end of the rotating rod (701) is fixedly connected with an adjustment wheel (702), and the adjustment wheel (702) is connected to the top frame (4). The gear rack (602) is meshed with the transmission setting, and a push rod (703) is provided in a sliding manner on the inner wall of the bottom end of the rotating rod (701), and a bevel is provided on one side of the push rod (703). The push rod (703) is provided in sliding contact with the rotating seat (2) and the electromagnetic adsorption seat (3), and a spring (704) is fixedly connected to the inner end of the push rod (703), and the other end of the spring (704) is fixedly connected to the inner wall of the rotating rod (701). A wiping plate (8) is provided in a sliding manner above one end of the rotating seat (2), and a transmission mechanism (9) is provided in a sliding manner below one end of the rotating seat (2).

2. The varistor welding tool based on the electromagnetic stable adsorption structure according to claim 1, characterized in that: A positioning groove (101) is provided on one side of the base (1), a positioning block (102) is movably inserted into the positioning groove (101), and a material receiving box (103) is fixedly connected to one end of the positioning block (102).

3. The varistor welding tool based on the electromagnetic stable adsorption structure according to claim 1, characterized in that: A hydraulic rod (201) is rotatably connected to the lower side of the rotating seat (2), and the other end of the hydraulic rod (201) is rotatably connected to the base (1). One side of the rotating seat (2) is symmetrically structured with two sliding grooves (202).

4. The varistor welding tool based on the electromagnetic stable adsorption structure according to claim 3, characterized in that: A sponge pad is fixedly connected to the lower surface of the wiping plate (8), and two push rod groups (801) are rotatably connected to the upper surface of the wiping plate (8). An L-shaped rod (802) is fixedly connected to the other end of the push rod group (801), and the L-shaped rod (802) is rotatably connected to the rotating seat (2).

5. The varistor welding tool based on the electromagnetic stable adsorption structure according to claim 4, characterized in that: The transmission mechanism (9) comprises a triangular block (901), the triangular block (901) being arranged in sliding cooperation with the rotating seat (2), a contact rod (902) being fixedly connected to one side of the triangular block (901), and one end of the contact rod (902) being arranged in movable contact with one side of the base (1).

6. The varistor welding tool based on the electromagnetic stable adsorption structure according to claim 5, characterized in that: Guide rods (903) are provided on both sides of the triangular block (901) in sliding contact, a connecting rod (904) is fixedly connected to the guide rod (903), the other end of the connecting rod (904) is rotatably connected to the bottom end of the L-shaped rod (802), a slider (905) is rotatably connected to the connecting rod (904), the slider (905) is slidably matched with the inner wall of the slide groove (202), a tension spring (906) is fixedly connected to one side of the slider (905), and the other end of the tension spring (906) is fixedly connected to the inner wall of the slide groove (202).

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