Pneumatic gun

Abstract

The utility model discloses a pneumatic gun which comprises a gun handle, a gun body and a discharging disc assembly, and the discharging disc assembly and the gun handle are arranged on the upper portion and the lower portion of the gun body respectively. The gun handle is composed of a handle part, a connecting part and a reversing valve arranged in the handle part and the connecting part, and the connecting part is in threaded connection with the gun body through a first bolt assembly arranged on the connecting part; a mechanical push needle assembly and an operation handle arranged on the front side of the gun handle are arranged in the gun body, and the operation handle is used for driving the mechanical push needle assembly to act; the gun needle is mounted at the front end of the gun body, and the pintle is arranged on the lower portion of the front end of the gun body and used for detachable mounting of the gun needle and the gun body. According to the utility model, two implementation modes of external connection and hand holding are adopted to adapt to different operation occasions, and meanwhile, the gun pin is detachably mounted, so that different nailing requirements are further met in a mode of adapting to gun pins with different lengths.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic guns, in particular to a pneumatic gun. Background Technique

[0002] A pneumatic glue gun relies on compressed air as power to push the bottom of the glue and does not need to be connected to a power supply. Generally, a compressed air source is equipped on the production line of a factory (through a trachea from the air compressor station or air compressor of the factory). However, the existing pneumatic glue needle guns have the following defects in actual use:

[0003] First, the applicable range is limited, mostly in factories and other places;

[0004] Second, the usage method is single:

[0005] Third, the gun needle is mostly fixed to the gun body. It is very inconvenient to replace different pneumatic glue guns according to different nailing requirements. To solve the above problems, a pneumatic gun is now proposed. Content of the Utility Model

[0006] The purpose of the utility model is to provide a pneumatic gun, which can adapt to different operating occasions through two implementation methods of external connection and hand-held. At the same time, the detachable installation of the gun needle can further meet different nailing requirements by adapting different lengths of gun needles.

[0007] To achieve the above purpose, the utility model provides the following technical solution: a pneumatic gun, including: a gun handle, a gun body, and a material feeding tray assembly. The material feeding tray assembly and the gun handle are respectively arranged above and below the gun body; the gun handle is composed of a handle part, a connecting part, and a reversing valve arranged inside the two. The connecting part is threadedly connected to the gun body through a first bolt assembly arranged thereon; a mechanical needle pushing assembly is arranged inside the gun body, and an operating handle is arranged on the front side of the gun handle. The operating handle is used to drive the action of the mechanical needle pushing assembly; a gun needle is also installed at the front end of the gun body, and a needle bolt is arranged at the lower part of the front end of the gun body for the detachable installation of the gun needle and the gun body.

[0008] Preferably, the mechanical needle pushing assembly consists of a ratchet drive assembly and a drive block assembly distributed front and back; the ratchet drive assembly includes an internally threaded column fixed to the front end of the gun body and a gear retaining plate, and the gear retaining plate is connected to the internally threaded column by a nut; it further includes a ratchet gear rotatably connected to the gear retaining plate, and the ratchet gear is engaged with adjacent glue needles with a clearance; a positioning bead is arranged at the front end of the gun body, which is placed below the ratchet gear and limits the position of the ratchet gear after stepping; a pressure plate is installed above the ratchet gear; and a hook is slidably installed at the front end of the gun body, and the hook consists of a rod body, a transmission block and a hook block rotatably connected to the front end of the rod body through a pin shaft, and a spring connected between the transmission block and the hook block; wherein the hook part where the hook block is located is engaged with a single tooth groove on the ratchet gear, and when the hook moves back and forth, the ratchet gear remains stationary and in a stepping state respectively.

[0009] Preferably, a transmission groove is further opened at the front end of the gun body, and the transmission groove is composed of an inlet groove, a through groove and an outlet groove that are sequentially communicated. The inlet groove is communicated with the outlet of the material feeding tray assembly, and the outlet groove is used for the output of glue needles. A handle is arranged in the through groove, and the bottom end of the handle passes through a through hole opened on the pressure plate and is rotatably connected to the ratchet gear.

[0010] Preferably, the drive block assembly includes a slider slidably installed on the rear end of the gun body near one side of the hook, and a thimble fixed to the front end of the slider, and the end of the thimble away from the slider extends forward and is aligned with the gun needle; it further includes a rectifying block slidably installed on the rear end of the gun body away from one side of the hook, and the rectifying block consists of a transmission part, a top plate at the front end of the transmission part, and a reset block on the side wall at the front end of the transmission part, wherein the reset block is placed in front of a convex block arranged on the rod body; and a clamping block connected to the rectifying block through a mounting shaft arranged on the rectifying block, and the head of the clamping block passes through a long groove opened on the side wall of the transmission part and is engaged with a clamping groove opened on the side wall of the slider; it further includes a limiting groove opened at the top inside the gun body, and the limiting groove is used for limiting the positions of the clamping block and the rectifying block.

[0011] Preferably, a cylinder is further arranged at the rear end of the gun body, and the output end of the cylinder is connected to the clamping groove and is detachably installed on the gun body through a second bolt assembly.

[0012] Preferably, the first bolt assembly includes mounting holes respectively opened on both sides of the connecting part, and a plurality of threaded holes respectively opened horizontally on both sides of the gun body, and the mounting holes are connected to the corresponding threaded holes by first bolts.

[0013] Preferably, the material feeding tray assembly includes a fixed plate fixed to the top of the gun body, and a support column threadedly connected to the fixed plate through a third bolt assembly arranged in the middle of the fixed plate; it further includes a movable plate, and the movable plate is plugged and installed on the support column through a pin assembly arranged thereon.

[0014] Preferably, the plug assembly includes a plurality of first jacks opened on the strut; and a mounting sleeve fixed to the middle of the movable disk, with a second jack penetrating through the middle of the mounting sleeve; and also includes a plug body, and the insertion part where the plug body is located can pass through the second jack and the first jack to lock the position of the movable disk and the strut.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] Through the reversing valve provided in the gun handle and the mechanical push needle assembly provided in the gun body, the present utility model can realize two usage modes of the device. One is an external usage mode in which the reversing valve is connected to the compressed air gas source equipped on the existing factory production line through an air pipe from the factory air compressor station or air compressor, which is the prior art. The other is a hand-held usage mode by holding the gun handle and using the mechanical push needle assembly as the driving source to realize the automatic operation of the device. In addition, the needle bolt provided at the front end of the gun body realizes the detachable installation of the gun body and the gun needle, and then adapts to gun needles of different lengths to meet different nailing requirements. Description of the Drawings

[0017] Figure 1 is a first perspective three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 2 is a second perspective three-dimensional structural schematic diagram of the present utility model;

[0019] Figure 3 is a top view structural schematic diagram of the present utility model;

[0020] Figure 4 is a bottom view structural schematic diagram of the present utility model;

[0021] Figure 5 is a disassembled structural schematic diagram of the present utility model;

[0022] Figure 6 is a cross-sectional structural schematic diagram of the gun body;

[0023] Figure 7 is Figure 5 a partial enlarged structural schematic diagram of.

[0024] In the figure: 1. Gun handle; 101. Handle part; 102. Connection part; 103. Directional valve; 2. Gun body; 3. Feeding tray assembly; 301. Fixed disk; 302. Third bolt assembly; 303. Support pillar; 304. Movable disk; 305. Pin assembly; 3051. First jack; 3052. Mounting sleeve; 3053. Second jack; 3054. Pin body; 4. First bolt assembly; 401. Mounting hole; 402. Threaded hole; 5. Mechanical needle pushing assembly; 501. Cylinder; 502. Alignment block; 503. Block; 504. Slide block; 505. Thimble; 506. Card slot; 507. Positioning bead; 508. Ratchet gear; 509. Pressure plate; 510. Gun needle; 511. Hook; 5111. Rod body; 5112. Transmission block; 5113. Hook block; 5114. Spring; 512. Needle bolt; 513. Limit slot; 6. Handle; 7. Guide pressure block; 8. Transmission slot; 9. Operating handle; 10. Gear retaining piece; 11. Internal threaded column. Detailed implementation manners

[0025] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. They are 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. Therefore, it should not be construed as a limitation to the present invention. The following will introduce each embodiment of the present invention in detail with reference to the drawings.

[0026] Please refer to Figures 1 to 7 The present invention preferably provides the following technical solution: A pneumatic gun, comprising: a gun handle 1, a gun body 2, and a feeding tray assembly 3. The feeding tray assembly 3 and the gun handle 1 are respectively arranged above and below the gun body 2. The gun handle 1 is composed of a handle part 101, a connection part 102, and a directional valve 103 arranged inside the two. The connection part 102 is threadedly connected to the gun body 2 through the first bolt assembly 4 arranged thereon. A mechanical needle pushing assembly 5 is arranged inside the gun body 2, and an operating handle 9 is arranged on the front side of the gun handle 1. The operating handle 9 is used to drive the action of the mechanical needle pushing assembly 5. A gun needle 510 is further installed at the front end of the gun body 2, and a needle bolt 512 is arranged at the lower part of the front end of the gun body 2 for the detachable installation of the gun needle 510 and the gun body 2.

[0027] In this application, in combination with Figure 1 、 2As shown in Figures 5, the material feeding tray assembly 3 and the gun handle 1 are respectively arranged at the upper and lower parts of the gun body 2. At the same time, the reversing valve 103 arranged inside the gun handle 1 and the mechanical needle pushing assembly 5 arranged inside the gun body 2 can realize two usage modes of the device. One of them is the external usage mode in which the reversing valve 103 is connected to the compressed air gas source equipped on the existing factory production line through an air pipe from the factory air compressor station or air compressor, which is the prior art. The other is the hand-held usage mode by holding the gun handle 1 and using the mechanical needle pushing assembly 5 as the driving source to realize the automatic operation of the device. In addition, the needle bolt 512 arranged at the front end of the gun body 2 realizes the detachable installation of the gun body 2 and the gun needle 510, and then adapts to gun needles of different lengths to meet different nailing requirements.

[0028] This application adapts to different operating occasions through two implementation modes of external connection and hand-held. At the same time, the detachable installation of the gun needle 510 further meets different nailing requirements by adapting gun needles 510 of different lengths.

[0029] Furthermore, the mechanical needle pushing assembly 5 is composed of a ratchet transmission assembly and a driving block assembly distributed front and back; the ratchet transmission assembly includes an internally threaded column 11 fixed at the front end of the gun body 2 and a gear retaining plate 10, and the gear retaining plate 10 is connected to the internally threaded column 11 through a nut; it also includes a ratchet gear 508 rotatably connected to the gear retaining plate 10, and the ratchet gear 508 is engaged with adjacent glue needles with a gap; a positioning bead 507 arranged at the front end of the gun body 2 is placed below the ratchet gear 508 and limits the ratchet gear 508 after stepping; a pressing plate 509 is installed above the ratchet gear 508; and a hook 511 slidably installed at the front end of the gun body 2, and the hook 511 is composed of a rod body 5111, a transmission block 5112 rotatably connected to the front end of the rod body 5111 through a pin shaft, a hook block 5113, and a spring 5114 connecting the transmission block 5112 and the hook block 5113; wherein the hook part where the hook block 5113 is located is engaged with a single tooth groove on the ratchet gear 508, and when the hook 511 moves back and forth, the ratchet gear 508 remains stationary and steps respectively.

[0030] This application will be specifically described in the hand-held usage mode;

[0031] The driving block assembly, as the driving source of the ratchet transmission assembly, can act on the hook 511 to realize the forward and backward displacement of the hook 511. The hook 511 is composed of a rod body 5111, a transmission block 5112, a hook block 5113, and a spring 5114 connecting the transmission block 5112 and the hook block 5113. Combined with Figure 5 、 6, as shown in FIGS. 7, the hook portion where the hook block 5113 is located engages with a single tooth groove on the ratchet gear 508. Therefore, when the hook 511 is subjected to a forward moving force, the hook block 5113 moves forward. At this time, the ratchet gear 508 remains stationary. When the hook 511 is subjected to a backward force, due to the engagement between the hook block 5113 and the ratchet gear 508, combined with Figure 6 , the ratchet gear 508 is driven to rotate clockwise and step one grid. This process can send the lower-position glue needle to the position of the gun needle 510, completing the pre-preparation process of the lower-position glue needle.

[0032] Furthermore, a transmission groove 8 is also provided at the front end of the gun body 2. The transmission groove 8 is composed of an inlet groove, a through groove, and an outlet groove that are sequentially connected. Among them, the inlet groove is connected to the discharge port of the material feeding tray assembly 3, and the outlet groove is used for the output of the glue needle. A handle 6 is provided in the through groove, and the bottom end of the handle 6 passes through the through hole provided on the pressing plate 509 and is rotatably connected to the ratchet gear 508.

[0033] Here, the transmission groove 8 can be used as a conveying channel for the glue needle. As the ratchet gear 508 rotates step by step, the step-by-step conveying process of the glue needle inside the transmission groove 8 can be realized. Since the gear stop 10 rotatably connected to the ratchet gear 508 is threadedly connected to the internal thread column 11 through a nut, and at the same time the ratchet gear 508 is rotatably connected to the handle 6, rotating the handle 6 can realize the manual reset process of the ratchet gear 508. This process can solve unexpected situations such as the jamming of the glue needle and the ratchet gear 508.

[0034] Furthermore, the driving block assembly includes a slider 504 slidably installed on the rear end of the gun body 2 near the hook 511 side, and a thimble 505 fixed to the front end of the slider 504. The end of the thimble 505 away from the slider 504 extends forward and is adapted and aligned with the gun needle 510; it also includes a correcting block 502 slidably installed on the rear end of the gun body 2 away from the hook 511 side. The correcting block 502 is composed of a transmission part, a top plate at the front end of the transmission part, and a reset block on the side wall at the front end of the transmission part. Among them, the reset block is in front of the convex block provided on the rod body 5111; and a clamping block 503 connected to the correcting block 502 through the mounting shaft provided on the correcting block 502. The head of the clamping block 503 passes through the long groove provided on the side wall of the transmission part and is adapted and engaged with the clamping groove 506 provided on the side wall of the slider 504; it also includes a limiting groove 513 provided at the top inside the gun body 2. The limiting groove 513 is used for position limiting of the clamping block 503 and the correcting block 502; furthermore, a cylinder 501 is also provided at the rear end of the gun body 2, and the output end of the cylinder 501 is connected to the clamping groove 506 and realizes its detachable installation with the gun body 2 through the second bolt assembly. The second bolt assembly is an existing mature technology and will not be elaborated here.

[0035] As the handheld use mode of this application, combined with Figure 5 , 6As shown in the figure, the function of the operating handle 9 is to drive the slider 504 to move back and forth inside the gun body 2, and the ejector pin 505 provided at the front end of the slider 504 is adaptively docked with the gun needle 510 to complete the process of ejecting the glue needle and preparing the lower glue needle;

[0036] Specifically: for the slider 504, the ejector pin 505 fixed at its front end extends forward and docks with the gun needle 510. The card slot 506 opened on its side wall can be engaged with the block 503 at the initial position. The aligning block 502 connected to the aligning block 502 through the mounting shaft is composed of a transmission part, a top plate at the front end of the transmission part, and a reset block on the side wall at the front end of the transmission part. Here, the top plate can align the glue needle inside the transmission slot 8, and the reset block is placed in front of the convex block where the rod body 5111 is located. Combining Figure 5 、 6 shown;

[0037] Advancing process: When the air cylinder 501 extends forward, that is, when the slider 504 moves forward, it can drive the ejector pin 505 to move forward. The block 503 catches the slider 504 and drives the aligning block 502 to move forward accordingly. When the aligning block 502 reaches the end, the top plate where it is located passes through the lower part of the ratchet gear 508 and aligns the glue needle at the same time. Then the slider 504 continues to move forward so that the block 503 disengages from the slider 504 and is stuck upward at the position of the limit slot 513 to prevent the aligning block 502 from retracting;

[0038] After that, the slider 504 continues to move forward and collides with the rod body 5111 where the hook 511 is located, and at the same time pushes the hook block 5113 to the specified position. During this process, the ejector pin 505 completely ejects the aligned glue needle through the gun needle 510;

[0039] Reset preparation process: When the air cylinder 501 retracts, that is, when the slider 504 and the ejector pin 505 move back and collide with the block 503 and the aligning block 502, the block 503 re-catches the card slot 506 on the slider 504, and then follows the slider 504 and drives the aligning block 502 to move back. When the aligning block 502 moves back, the reset block where it is located contacts the convex block on the hook 511 and drives the hook block 5113 to hook the ratchet gear 508 to rotate, and sends the next glue needle in place. The remaining components return to the initial position and wait for the next round of movement.

[0040] Furthermore, the first bolt assembly 4 includes mounting holes 401 respectively opened on both sides of the connecting portion 102, and a plurality of threaded holes 402 respectively opened horizontally on both sides of the gun body 2. The mounting holes 401 and the corresponding threaded holes 402 are connected by the first bolts.

[0041] Combining Figure 1 、 2As shown in FIGS. 4 and 5, the mounting holes 401 are connected to the corresponding plurality of threaded holes 402 by the first bolts. This design not only realizes the detachable installation of the gun handle 1 and the gun body 2, but also the position of the mounting holes 401 can be adjusted to realize the position movement of the gun handle 1 on the gun body 2, so as to meet the different grip habits of different users.

[0042] Further, the material feeding tray assembly 3 includes a fixed plate 301 fixed on the top of the gun body 2, and a support column 303 threadedly connected to the fixed plate 301 through a third bolt assembly 302 provided in the middle of the fixed plate 301; it further includes a movable plate 304, and the movable plate 304 is inserted and installed with the support column 303 through a pin assembly 305 provided thereon.

[0043] At this point, in combination with Figure 1 、 2 、5 shown, one end of the support column 303 is threadedly connected to the fixed plate 301 through the third bolt assembly 302. The third bolt assembly 302 is an existing mature technology and will not be described in detail here. The other end is connected to the movable plate 304 through the pin assembly 305 to realize the placement and unwinding process of the glue needles. And the position adjustment of the movable plate 304 here further realizes the stable placement process of glue needles of different lengths.

[0044] Further, the pin assembly 305 includes a plurality of first insertion holes 3051 opened on the support column 303; and a mounting sleeve 3052 fixed in the middle of the movable plate 304, and a second insertion hole 3053 is penetrated through the middle of the mounting sleeve 3052; it further includes a pin body 3054, and the insertion part where the pin body 3054 is located can pass through the second insertion hole 3053 and the first insertion hole 3051 to realize the position locking of the movable plate 304 and the support column 303.

[0045] In the installed state, in combination with Figure 1 、 2 shown, in the disassembled state, in combination with Figure 5 shown, this design is simple to operate and highly practical;

[0046] Further, a guiding pressing block 7 is further provided on the upper part of the gun body 2. The guiding pressing block 7 is placed below the inlet groove of the transmission groove 8 to prevent the glue needles from running out from the side, in combination with Figure 5 。

[0047] In the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated. There are various ways of detachable installation. For example, it can be by the way of cooperation of insertion and snap, or by the way of bolt connection, etc.

[0048] The above embodiments' specific description of the present utility model is only for further explaining the present utility model, and cannot be construed as a limitation on the protection scope of the present utility model. Any non-essential improvements and adjustments made by those skilled in the art based on the content of the above utility model fall within the protection scope of the present utility model.

Claims

1. Pneumatic gun, characterized in that, Including: A gun handle (1), a gun body (2), and a material feeding tray assembly (3). The material feeding tray assembly (3) and the gun handle (1) are respectively arranged above and below the gun body (2). The gun handle (1) is composed of a handle part (101), a connecting part (102), and a reversing valve (103) arranged inside the two. The connecting part (102) is threadedly connected to the gun body (2) through a first bolt assembly (4) arranged thereon. A mechanical push pin assembly (5) is arranged inside the gun body (2), and an operating handle (9) is arranged on the front side of the gun handle (1). The operating handle (9) is used to drive the mechanical push pin assembly (5) to act. It further includes a gun needle (510) installed at the front end of the gun body (2), and a needle bolt (512) arranged at the lower part of the front end of the gun body (2) for detachably installing the gun needle (510) on the gun body (2).

2. The pneumatic gun according to claim 1, wherein: The mechanical push pin assembly (5) is composed of a ratchet drive assembly and a drive block assembly distributed front and rear. The ratchet drive assembly includes an internally threaded column (11) fixed at the front end of the gun body (2), and a gear retaining plate (10). The gear retaining plate (10) is connected to the internally threaded column (11) through a nut. It further includes a ratchet gear (508) rotatably connected to the gear retaining plate (10). The ratchet gear (508) is engaged with adjacent glue needles with a clearance. A positioning bead (507) arranged at the front end of the gun body (2) is placed below the ratchet gear (508) and limits the ratchet gear (508) after stepping. A pressing plate (509) is installed above the ratchet gear (508). And a hook (511) slidably installed at the front end of the gun body (2). The hook (511) is composed of a rod body (5111), a transmission block (5112) and a hook block (5113) rotatably connected to the front end of the rod body (5111) through a pin shaft, and a spring (5114) connecting the transmission block (5112) and the hook block (5113). Wherein the hook part where the hook block (5113) is located is engaged with a single tooth groove on the ratchet gear (508). When the hook (511) moves forward and backward, the ratchet gear (508) remains stationary and in a stepping state respectively.

3. The pneumatic gun according to claim 1, wherein: A transmission groove (8) is further opened at the front end of the gun body (2). The transmission groove (8) is composed of an inlet groove, a through groove, and an outlet groove that are sequentially connected. The inlet groove is communicated with the discharge port of the material feeding tray assembly (3), the outlet groove is used for outputting glue needles, and a handle (6) is arranged in the through groove. The bottom end of the handle (6) passes through a through hole opened on the pressing plate (509) and is rotatably connected to the ratchet gear (508).

4. The pneumatic gun according to claim 2, wherein: The drive block assembly includes a slider (504) slidably installed on the side of the rear end of the gun body (2) close to the hook (511), and a thimble (505) fixed to the front end of the slider (504). The end of the thimble (505) far from the slider (504) extends forward and is aligned with the gun needle (510) in an adapted manner. It further includes a correcting block (502) slidably mounted on the side of the rear end of the gun body (2) away from the hook (511), and the correcting block (502) is composed of a transmission part, a top plate at the front end of the transmission part, and a reset block on the side wall of the front end of the transmission part, wherein the reset block is placed in front of a convex block provided on the rod body (5111); and a clamping block (503) connected to the correcting block (502) through a mounting shaft provided on the correcting block (502), and the head of the clamping block (503) passes through a long slot opened on the side wall of the transmission part and is adaptively clamped with a clamping slot (506) opened on the side wall of the slider (504); It further includes a limiting slot (513) opened at the inner top of the gun body (2), and the limiting slot (513) is used for position limiting of the clamping block (503) and the correcting block (502).

5. The pneumatic gun according to claim 1, characterized in that: A cylinder (501) is further provided at the rear end of the gun body (2), and the output end of the cylinder (501) is connected to the clamping slot (506) and is detachably installed with the gun body (2) through a second bolt assembly.

6. The pneumatic gun according to claim 1, characterized in that: The first bolt assembly (4) includes mounting holes (401) respectively opened on both sides of the connecting part (102), and a plurality of threaded holes (402) respectively opened horizontally on both sides of the gun body (2), and the mounting holes (401) are connected to the corresponding threaded holes (402) through first bolts.

7. The pneumatic gun according to claim 1, characterized in that: The feeding tray assembly (3) includes a fixed plate (301) fixed on the top of the gun body (2), and a support column (303) threadedly connected to the fixed plate (301) through a third bolt assembly (302) provided in the middle of the fixed plate (301); It further includes a movable plate (304), and the movable plate (304) is inserted and installed with the support column (303) through a pin assembly (305) provided thereon.

8. The pneumatic gun according to claim 7, characterized in that: The pin assembly (305) includes a plurality of first insertion holes (3051) opened on the support column (303); and a mounting sleeve (3052) fixed in the middle of the movable plate (304), and a second insertion hole (3053) is penetrated through the middle of the mounting sleeve (3052); It further includes a pin body (3054), and the inserted part of the pin body (3054) can pass through the second insertion hole (3053) and the first insertion hole (3051) to realize the position locking of the movable plate (304) and the support column (303).

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