Automatic soldering machine for security terminal wire

Abstract

The invention discloses an automatic soldering machine for security and protection terminal wires, and relates to the technical field of soldering machines, the automatic soldering machine comprises a base, an overturning piece is fixedly mounted at the upper end of the base, a conveying assembly is fixedly mounted at the end of the overturning piece, the conveying assembly is overturned through the overturning piece, and meanwhile the security and protection terminal wires are conveyed in cooperation with the conveying assembly; according to the automatic soldering machine for the security terminal wire, when the telescopic piece is started, the pressing plate arranged at the output end of the telescopic piece is synchronously driven to move, and the security terminal wire is limited through the pressing plate, so that the security terminal wire is stably located on the inner wall of the arc-shaped groove, and follow-up operation is facilitated. When the movable plate moves, a cylinder fixedly installed at the end of the movable plate is synchronously driven to move, and an annular clamping block is slidably installed on the inner wall of the cylinder, so that the position of the movable plate is adjusted, the annular clamping block is made to peel the end of the security terminal wire, and meanwhile, the annular clamping block is matched with an arc-shaped groove in a roller to correct the security terminal wire; and overall locking during subsequent welding is facilitated.

Description

Technical Field

[0001] The invention relates to soldering machine technology, in particular to an automatic soldering machine for security terminal wires. Background Art

[0002] Security terminal wires usually refer to cables used in security systems to connect various devices, mainly including video surveillance, access control systems, alarm systems and other related equipment. The function of the terminal wire is to help connect the device to the control center or power supply to ensure the stability of signal transmission and power supply.

[0003] A Chinese invention patent with publication number CN111054990A discloses a soldering device for a wire joint. The soldering device for a wire joint is provided with a first circular through hole of a moving body, a third circular through hole of a coating cavity, a coating cavity, a handle, a threaded rod, a rotating body, an annular discharge cavity and a discharge hole. The wire joint can enter the interior of the coating cavity through the first circular through hole of the moving body and the third circular through hole of the coating cavity. The handle and the moving body are squeezed, and the handle drives the rotating body to rotate through the threaded rod. The annular discharge cavity inside the rotating body starts to rotate, and the tin inside the annular discharge cavity enters the interior of the coating cavity through the discharge hole and then drips onto the wire joint. The molten tin is inside the device, which reduces the danger of the tin and can also preserve heat to prevent the tin from solidifying.

[0004] When in use, existing equipment may not have good adaptability to different types of terminal wires, materials or welding requirements, so that when the security terminal wires are transported, the welding ends are easily bent, which affects the overall quality during subsequent soldering, and it is impossible to quickly adjust the spacing and shape of the clamps according to production needs to adapt to terminals and cables of different specifications. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic soldering machine for security terminal wires to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: an automatic soldering machine for security terminal wires, comprising a base, a flipping piece is fixedly installed on the upper end of the base, and a conveying assembly is fixedly installed on the end of the flipping piece, the conveying assembly is flipped by the flipping piece, and the security terminal wire is conveyed in cooperation with the conveying assembly; A detection component, which is assembled on the upper end of the base, and the end of the security terminal line is detected by the detection component; The detection assembly includes a bottom plate fixedly connected to the base, a roller is rotatably mounted on the upper end of the bottom plate, a plurality of groups of arc grooves are formed on the outer surface of the roller, and the plurality of groups of arc grooves are evenly distributed on the outer surface of the roller; A movable plate is slidably mounted on the upper end of the bottom plate and on one side of the drum, and a cylinder is fixedly mounted on the end of the movable plate, a power block is slidably mounted on the inner wall of the cylinder, and an annular clamp is fixedly mounted on the end of the power block, and the inner wall of the annular clamp fits the outer surface of the end of the security terminal line; A connecting rod is fixedly installed on the inner wall of the power block, and the end of the connecting rod 382 passes through and extends to the outside of the cylinder. A ring is fixedly installed on the end of the connecting rod, and the inner wall of the ring is slidably connected to the outer surface of the cylinder. At the same time, an elastic member is sleeved on the outer surface of the cylinder, one end of the elastic member is connected to the ring, and the other end is connected to the outer surface of the cylinder.

[0007] As a further optimization solution of the present invention, a telescopic member is fixedly installed on the upper end of the bottom plate, and a pressing plate is fixedly installed on the output end of the telescopic member, and the outer surface of the security terminal line is pressed by the pressing plate.

[0008] As a further optimization solution of the present invention, a support column is provided at the upper end of the bottom plate and located on one side of the drum, and a transmission plate is fixedly installed at the upper end of the support column, and the transmission plate is inclined.

[0009] As a further optimization solution of the present invention, a hole is provided at the upper end of the bottom plate and between the telescopic member and the roller, and the security terminal wire after detection is led out through the hole.

[0010] As a further optimization solution of the present invention, the conveying assembly includes a sleeve plate fixedly connected to the flip member, a fixing plate is fixedly installed on the inner wall of the sleeve plate, and a driving member is fixedly installed on the end of the fixing plate.

[0011] As a further optimization solution of the present invention, a turntable is rotatably mounted on one end of the fixed plate away from the driving member, and the end of the turntable is fixedly connected to the output end of the driving member.

[0012] As a further optimization solution of the present invention, a first sliding groove is provided at the end of the turntable, and a second sliding groove is provided at the end of the turntable away from the first sliding groove.

[0013] As a further optimization scheme of the present invention, an adjustment block is rotatably installed at the end of the fixed plate, and the cross-section of the adjustment block is V-shaped. The outer surface of one end of the adjustment block is slidably connected to the inner wall of the first slide groove, and a movable block is slidably installed at the other end.

[0014] As a further optimization solution of the present invention, a first guide rail is fixedly installed at the end of the fixed plate and located on one side of the turntable, and a second guide rail is slidably installed at the end of the first guide rail, and the first guide rail and the second guide rail are in a vertical state; The inner wall of the end of the moving block is slidably connected to the outer surface of the second guide rail, and the end of the moving block is fixedly mounted with a clamp.

[0015] As a further optimization scheme of the present invention, a movable block is rotatably installed at the end of the fixed plate, and the outer surface of the end of the movable block is slidably connected to the inner wall of the second slide groove. A push plate is fixedly installed at the end of the second guide rail, a through hole is opened at the end of the push plate, and the inner wall of the through hole is slidably connected to the outer surface of the end of the movable block.

[0016] Compared with the prior art, the automatic soldering machine for security terminal wires provided by the present invention has the following beneficial effects: when the telescopic member is started, the pressure plate arranged at its output end is synchronously driven to move, and the security terminal wire is limited by the pressure plate, so that the security terminal wire is stably located on the inner wall of the arc groove, which is convenient for subsequent operations. When the moving plate moves, the cylinder fixedly installed at its end is synchronously driven to move, and since the inner wall of the cylinder is slidably installed with an annular clamping block, the position of the moving plate is adjusted, so that the annular clamping block peels the end of the security terminal wire, and at the same time cooperates with the arc groove on the drum to correct the security terminal wire, which is convenient for locking the whole during subsequent welding.

[0017] When the turntable rotates, it synchronously drives the movable block slidably installed on the inner wall of the second slide groove to rotate around the connection of the fixed plate. Since the other end of the movable block is slidably connected to the inner wall of the through hole, when the movable block rotates, the push plate is driven to drive the second large cabinet to move on the first guide rail, and the security terminal wires are transferred to the welding position, so as to achieve accurate positioning of each welding point. At the same time, it can adapt to terminals and cables of different sizes, thereby improving the flexibility and adaptability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a conveying assembly provided in an embodiment of the present invention; Figure 3A first cross-sectional view of the internal structure of a conveying assembly provided in an embodiment of the present invention; Figure 4 A second cross-sectional view of the internal structure of the conveying assembly provided by an embodiment of the present invention; Figure 5 A schematic diagram of the structure of a detection component provided in an embodiment of the present invention; Figure 6 A cross-sectional view of the internal structure of a detection component provided by an embodiment of the present invention; Figure 7 A schematic diagram of a moving block structure provided by an embodiment of the present invention; Figure 8 A cross-sectional view of the internal structure of a moving block provided in an embodiment of the present invention.

[0020] Description of reference numerals: 1. Base; 2. Conveying assembly; 3. Detection assembly; 11. Flipping member; 21. Sleeve plate; 22. Fixed plate; 221. Driving member; 23. Turntable; 231. First slide groove; 232. Second slide groove; 24. Adjustment block; 25. First guide rail; 251. Second guide rail; 26. Moving block; 27. Movable block; 28. Push plate; 281. Through hole; 29. ​​Clamping member; 31. Bottom plate; 311. Hole; 32. Telescopic member; 33. Pressing plate; 34. Support column; 341. Transmission plate; 35. Roller; 351. Arc groove; 36. Moving plate; 37. Cylinder; 38. Ring; 381. Elastic member; 382. Connecting rod; 39. Power block; 391. Annular clamping block. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Example: See Figure 1-Figure 8 A security terminal wire automatic soldering machine includes a base 1, a flip piece 11 is fixedly installed on the upper end of the base 1, and a conveying component 2 is fixedly installed on the end of the flip piece 11. The conveying component 2 is flipped by the flip piece 11, and the security terminal wire is conveyed by the conveying component 2 at the same time.

[0024] In this solution, the flipping member 11 is composed of a motor and a support plate. The motor is fixedly mounted on the support plate, and the output end of the motor passes through and extends to the other end of the support plate. At the same time, the output end of the motor is fixedly connected to the end of the conveying component 2. The conveying component 2 is driven by the motor to flip until it reaches the optimal position and stops.

[0025] Furthermore, a detection component 3 is assembled on the upper end of the base 1, and the end of the security terminal line is detected by the detection component 3; wherein the detection component 3 includes a bottom plate 31 fixedly connected to the base 1, and a roller 35 is rotatably mounted on the upper end of the bottom plate 31, and a plurality of groups of arc grooves 351 are provided on the outer surface of the roller 35, and the plurality of groups of arc grooves 351 are evenly distributed on the outer surface of the roller 35.

[0026] In this embodiment, a device with power output, such as a motor, is fixedly installed at the end of the drum 35 and is connected to an external control device. The motor drives the drum 35 to rotate, and cooperates with the arc groove 351 on its outer surface to output the security terminal wire in a directional manner, thereby reducing the accumulation of the security terminal wire.

[0027] Furthermore, a movable plate 36 is slidably installed at the upper end of the bottom plate 31 and on one side of the roller 35, and a cylinder 37 is fixedly installed at the end of the movable plate 36, a power block 39 is slidably installed on the inner wall of the cylinder 37, and an annular clamp 391 is fixedly installed at the end of the power block 39, and the inner wall of the annular clamp 391 fits with the outer surface of the end of the security terminal line.

[0028] Specifically, a component with a telescopic function, such as an electric telescopic rod, is provided at the end of the movable plate 36 , and the movable plate 36 is driven to move by the electric telescopic rod until it reaches an optimal position and stops.

[0029] When the movable plate 36 moves, the cylinder 37 fixedly installed at its end is synchronously driven to move. Since the inner wall of the cylinder 37 is slidably installed with an annular clamp 391, the position of the movable plate 36 is adjusted, so that the annular clamp 391 strips the end of the security terminal line.

[0030] The end of the annular clamp 391 is composed of multiple groups of arc rods with a certain degree of elasticity, and the ends of the two arc rods are provided with cutting blades for cutting the wire skin at the end of the security terminal line. At the same time, the end of the arc rod is inclined to the end of the cylinder 37, so that when the annular clamp 391 moves, the multiple groups of arc rods are moved closer to the middle in cooperation with the inclined inner wall of the cylinder 37 until they are completely fitted to the outer surface of the security terminal line.

[0031] The inner wall of the annular clamp block 391 is provided with a spring plate, which is composed of a spring and a protective plate. When the movable plate 36 is separated from the security terminal wire, the cut wire skin is guided out through the elastic plate.

[0032] Furthermore, a connecting rod 382 is fixedly installed on the inner wall of the power block 39, and the end of the connecting rod 382 passes through and extends to the outside of the cylinder 37. A ring 38 is fixedly installed on the end of the connecting rod 382. The inner wall of the ring 38 is slidably connected to the outer surface of the cylinder 37. At the same time, an elastic member 381 is sleeved on the outer surface of the cylinder 37. One end of the elastic member 381 is connected to the ring 38, and the other end is connected to the outer surface of the cylinder 37.

[0033] Specifically, when the ring 38 is moved by force, the connecting rod 382 fixedly installed at its end is synchronously driven to move. Since the end of the connecting rod 382 is fixedly connected to the inside of the power block 39, the power block 39 moves synchronously with the ring 38.

[0034] The elastic member 381 is an elastic member such as a spring, and the ring 38 is buffered by the elastic member 381 . When the force on the ring 38 stops, the ring 38 is pushed to the initial position by the force of the elastic member 381 .

[0035] At the same time, an electric telescopic rod is also provided at the end of the ring 38, and power is provided to the ring 38 through the electric telescopic rod.

[0036] Furthermore, a telescopic member 32 is fixedly mounted on the upper end of the bottom plate 31 , and a pressing plate 33 is fixedly mounted on the output end of the telescopic member 32 , and the pressing plate 33 is used to press the outer surface of the security terminal line.

[0037] Specifically, the telescopic member 32 is a component with a telescopic function such as an electric telescopic rod, and is connected to an external control device. When the telescopic member 32 is started, it synchronously drives the pressure plate 33 arranged at its output end to move, and the security terminal line is limited by the pressure plate 33, so that the security terminal line is stably located on the inner wall of the arc groove 351, which is convenient for subsequent operations.

[0038] Furthermore, a support column 34 is provided at the upper end of the bottom plate 31 and located on one side of the roller 35 , and a transmission plate 341 is fixedly installed at the upper end of the support column 34 , and the transmission plate 341 is inclined.

[0039] Specifically, an electric telescopic rod is provided at the end of the transmission plate 341, and the electric telescopic rod is used to block the transported security terminal wires, so that the security terminal wires remain smooth during transportation and avoid blockage.

[0040] Furthermore, a hole 311 is provided at the upper end of the bottom plate 31 and between the telescopic member 32 and the roller 35 , and the detected security terminal wire is led out through the hole 311 .

[0041] Specifically, the processed security terminal wire is led out through the hole 311 so that the security terminal wire is directly transferred to the end of the conveying component 2, which is convenient for subsequent operations.

[0042] Further, the conveying assembly 2 includes a sleeve plate 21 fixedly connected to the flip member 11, a fixing plate 22 is fixedly mounted on the inner wall of the sleeve plate 21, and a driving member 221 is fixedly mounted on the end of the fixing plate 22. A turntable 23 is rotatably mounted on one end of the fixing plate 22 away from the driving member 221, and the end of the turntable 23 is fixedly connected to the output end of the driving member 221.

[0043] In this embodiment, the driving member 221 is a device with power output such as a motor, and is connected to an external control device. When the driving member 221 is started, it synchronously drives the turntable 23 arranged at its output end to rotate.

[0044] Furthermore, a first slide groove 231 is provided at the end of the rotating disk 23, and a second slide groove 232 is provided at one end of the rotating disk 23 away from the first slide groove 231. An adjusting block 24 is rotatably mounted at the end of the fixed plate 22, and the cross section of the adjusting block 24 is V-shaped, the outer surface of one end of the adjusting block 24 is slidably connected to the inner wall of the first slide groove 231, and the other end is slidably mounted with a moving block 26.

[0045] Specifically, when the turntable 23 rotates, the first slide groove 231 opened at its end is driven to rotate. Since the inner wall of the first slide groove 231 is slidably connected with the outer surface of the end of the adjustment block 24, the adjustment block 24 is driven to reciprocate left and right around the connection with the fixed plate 22 when the turntable 23 rotates; when the adjustment block 24 moves, the moving block 26 slidably installed at the other end thereof is driven to move synchronously.

[0046] Furthermore, a first guide rail 25 is fixedly installed at the end of the fixed plate 22 and located on one side of the turntable 23, and a second guide rail 251 is slidably installed at the end of the first guide rail 25, and the first guide rail 25 and the second guide rail 251 are in a vertical state; the inner wall of the end of the moving block 26 is slidably connected to the outer surface of the second guide rail 251, and the end of the moving block 26 is fixedly installed with a clamping member 29.

[0047] Specifically, the moving block 26 is limited by the second guide rail 251 so that the moving block 26 remains stable when moving. At the same time, a moving groove is opened at the end of the moving block 26. When the moving block 26 moves, the outer surface of the end of the adjustment block 24 is slidably connected to the inner wall of the moving groove to avoid interference when the moving block 26 moves.

[0048] The clamping member 29 is composed of a motor, a screw and two clamping blocks. The output end of the motor is fixedly connected to the end of the screw, and the outer surface of the screw is threadedly connected to the inner wall of one of the clamping blocks. At the same time, the end of the clamping block is slidably connected to the outer surface of the moving block 26, so that when the screw rotates, the clamping block is driven to move to one side of the other clamping block until the security terminal line is restricted. The outer surface of the clamping block is provided with rubber or other anti-slip components.

[0049] Furthermore, a movable block 27 is rotatably installed at the end of the fixed plate 22, and the outer surface of the end of the movable block 27 is slidably connected to the inner wall of the second slide groove 232. A push plate 28 is fixedly installed at the end of the second guide rail 251, and a through hole 281 is opened at the end of the push plate 28, and the inner wall of the through hole 281 is slidably connected to the outer surface of the end of the movable block 27.

[0050] Specifically, when the turntable 23 rotates, the movable block 27 slidably installed on the inner wall of the second slide groove 232 is synchronously driven to rotate around the connection with the fixed plate 22. Since the other end of the movable block 27 is slidably connected to the inner wall of the through hole 281, when the movable block 27 rotates, the push plate 28 is driven to drive the second guide rail 251 to move on the first guide rail 25, so as to transfer the security terminal line to the welding position.

[0051] The control device can select a single-chip microcomputer as the control end. In this embodiment, the single-chip microcomputer is a typical embedded microcontroller (Micro controller unit), which is composed of an arithmetic unit, a controller, a memory, an input and output device, etc., which is equivalent to a microcomputer. Compared with the general-purpose microprocessor used in personal computers, it emphasizes self-supply (no external hardware) and cost saving. Its biggest advantage is that it is small in size and can be placed inside the instrument, but it has a small storage capacity, a simple input and output interface, and low functional consumption.

[0052] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic soldering machine for security terminal wires, characterized in that: It comprises a base (1), a flip member (11) is fixedly mounted on the upper end of the base (1), and a conveying assembly (2) is fixedly mounted on the end of the flip member (11), the conveying assembly (2) is flipped by the flip member (11), and the security terminal wire is conveyed in cooperation with the conveying assembly (2); A detection component (3) mounted on the upper end of the base (1), and used to detect the end of the security terminal wire; The detection assembly (3) comprises a bottom plate (31) fixedly connected to the base (1); a roller (35) is rotatably mounted on the upper end of the bottom plate (31); a plurality of groups of arc grooves (351) are formed on the outer surface of the roller (35); and the plurality of groups of arc grooves (351) are evenly distributed on the outer surface of the roller (35); A movable plate (36) is slidably mounted on the upper end of the bottom plate (31) and located on one side of the roller (35); a cylinder (37) is fixedly mounted on the end of the movable plate (36); a power block (39) is slidably mounted on the inner wall of the cylinder (37); an annular clamping block (391) is fixedly mounted on the end of the power block (39); the inner wall of the annular clamping block (391) is in contact with the outer surface of the end of the security terminal line; A connecting rod (382) is fixedly mounted on the inner wall of the power block (39), and the end of the connecting rod (382) passes through and extends to the outside of the cylinder (37). A ring (38) is fixedly mounted on the end of the connecting rod (382), and the inner wall of the ring (38) is slidably connected to the outer surface of the cylinder (37). At the same time, an elastic member (381) is sleeved on the outer surface of the cylinder (37), and one end of the elastic member (381) is connected to the ring (38), and the other end is connected to the outer surface of the cylinder (37).

2. The automatic soldering machine for security terminal wires according to claim 1, characterized in that: A telescopic member (32) is fixedly mounted on the upper end of the bottom plate (31), and a pressing plate (33) is fixedly mounted on the output end of the telescopic member (32), and the outer surface of the security terminal wire is pressed by the pressing plate (33).

3. The automatic soldering machine for security terminal wires according to claim 2, characterized in that: A support column (34) is provided at the upper end of the bottom plate (31) and on one side of the roller (35), and a transmission plate (341) is fixedly mounted on the upper end of the support column (34), and the transmission plate (341) is in an inclined shape.

4. The automatic soldering machine for security terminal wires according to claim 3, characterized in that: A hole (311) is provided at the upper end of the bottom plate (31) and between the telescopic member (32) and the roller (35), and the detected security terminal wire is led out through the hole (311).

5. The automatic soldering machine for security terminal wires according to claim 1, characterized in that: The conveying assembly (2) comprises a sleeve plate (21) fixedly connected to the flip member (11), a fixing plate (22) is fixedly mounted on the inner wall of the sleeve plate (21), and a driving member (221) is fixedly mounted on the end of the fixing plate (22).

6. The automatic soldering machine for security terminal wires according to claim 5, characterized in that: A turntable (23) is rotatably mounted on one end of the fixed plate (22) away from the driving member (221), and an end of the turntable (23) is fixedly connected to an output end of the driving member (221).

7. The automatic soldering machine for security terminal wires according to claim 6, characterized in that: A first sliding groove (231) is provided at the end of the rotating disk (23), and a second sliding groove (232) is provided at an end of the rotating disk (23) away from the first sliding groove (231).

8. The automatic soldering machine for security terminal wires according to claim 7, characterized in that: An adjusting block (24) is rotatably mounted on the end of the fixed plate (22), and the cross section of the adjusting block (24) is V-shaped. The outer surface of one end of the adjusting block (24) is slidably connected to the inner wall of the first sliding groove (231), and the other end of the adjusting block (26) is slidably mounted.

9. The automatic soldering machine for security terminal wires according to claim 8, characterized in that: A first guide rail (25) is fixedly mounted at the end of the fixed plate (22) and located on one side of the rotating disk (23), and a second guide rail (251) is slidably mounted at the end of the first guide rail (25), the first guide rail (25) and the second guide rail (251) being in a vertical state; The inner wall of the end of the moving block (26) is slidably connected to the outer surface of the second guide rail (251), and the end of the moving block (26) is fixedly mounted with a clamping member (29).

10. The automatic soldering machine for security terminal wires according to claim 9, characterized in that: A movable block (27) is rotatably mounted on the end of the fixed plate (22), and the outer surface of the end of the movable block (27) is slidably connected to the inner wall of the second slide groove (232). A push plate (28) is fixedly mounted on the end of the second guide rail (251), and a through hole (281) is formed at the end of the push plate (28), and the inner wall of the through hole (281) is slidably connected to the outer surface of the end of the movable block (27).

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