Glue dipping pool for plastic gloves

Abstract

The invention relates to a plastic glove glue dipping pool which comprises an outer pool body, an inner pool body and a glue pumping piece, a first glue storage groove is formed in the outer pool body, a second glue storage groove is formed in the inner pool body, a glue inlet pipe and a glue outlet pipe are arranged on the glue pumping piece, the glue inlet pipe is communicated with the first glue storage groove, and the glue outlet pipe penetrates through the bottom wall of the second glue storage groove and is communicated with the second glue storage groove. And the glue pumping piece is used for pumping the glue solution in the glue storage tank I and conveying the glue solution into the glue storage tank II. The glue solution circularly flows between the first glue storage tank and the second glue storage tank, so that the uniformity of the glue solution in the second glue storage tank is improved, the sedimentation of the glue solution in the second glue storage tank is inhibited, and the performance effect of the plastic gloves obtained after glue dipping processing is more consistent.

Description

Technical Field

[0001] The present application relates to the field of plastic glove processing equipment, and in particular to a plastic glove dipping tank. Background Art

[0002] In the production process of plastic gloves, dipping is the most important step. Plastic gloves dipping is usually carried out by conveying the plastic glove mold with the glove lining into the glue pool through a conveying structure, and then the plastic glove mold with the lining is lowered and raised to cover the surface of the lining with glue to complete the dipping process.

[0003] For example, the utility model patent with patent publication number CN217226386U discloses a rubber glove dipping device, comprising: a frame; a dipping tank, which is arranged on the frame and is used for rubber gloves to be dipped to be inserted into for dipping; a lifting plate, both ends of the lifting plate are slidably connected to the frame and are located above the dipping tank; a power unit, which is connected to the lifting plate and is used to drive the lifting plate to reciprocate toward the dipping tank; a hand mold transmission rod, which is arranged below the lifting plate and has a hand mold slidably connected to the hand mold transmission rod; and a drive assembly, which is arranged on the upper surface of the lifting plate and is used to drive the hand mold transmission rod to rotate so that the hand mold moves to the top of the dipping tank.

[0004] When using the dipping tank in the above-mentioned rubber glove dipping device, when the glue solution contains inorganic fillers such as calcium carbonate and barium sulfate, the glue solution will settle, resulting in differences in the performance of the plastic gloves obtained after the dipping process, which needs to be improved. Summary of the Invention

[0005] In order to improve the problem that the glue liquid in the dipping tank will settle, resulting in differences in the performance effects of the plastic gloves obtained after the dipping process, the present application provides a plastic glove dipping tank.

[0006] The present application provides a plastic glove dipping tank, which adopts the following technical solution:

[0007] A plastic glove dipping tank comprises an outer tank body, an inner tank body and a glue extraction component, wherein the outer tank body is provided with a first glue storage tank, the inner tank body is provided with a second glue storage tank, the inner tank body is located within the first glue storage tank, and the glue extraction component is provided with a glue inlet pipe and a glue outlet pipe, the glue inlet pipe is connected to the first glue storage tank, the glue outlet pipe passes through the bottom wall of the second glue storage tank and is connected to the second glue storage tank, and the glue extraction component is used to extract the glue liquid in the first glue storage tank and transport it to the second glue storage tank.

[0008] By adopting the above technical solution, when the glue liquid settles, the concentration of the glue liquid in the glue storage tank 2 gradually increases from top to bottom, and the glue liquid near the slot opening in the glue storage tank 2 overflows and flows into the glue storage tank 1. The glue extraction component extracts the glue liquid in the glue storage tank 1 and transports it to the bottom of the glue storage tank 2, so that the glue liquid with lower concentration near the slot opening in the glue storage tank 2 is mixed with the glue liquid with higher concentration at the bottom of the glue storage tank 2. Due to the injection of glue liquid, the glue liquid near the slot opening in the glue storage tank 2 will continuously overflow and flow into the glue storage tank 1, and the glue liquid in the glue storage tank 1 will be continuously transported to the bottom of the glue storage tank 2 by the glue extraction component, so that the glue liquid circulates between the glue storage tank 1 and the glue storage tank 2, thereby improving the uniformity of the glue liquid in the glue storage tank 2, inhibiting the glue liquid in the glue storage tank 2 from settling, and making the performance of the plastic gloves obtained after the dipping process more consistent.

[0009] Optionally, a cover is provided on the inner pool body, and the cover is located in the second glue storage tank and above the glue outlet pipe. A cavity is formed between the cover and the inner pool body, and the end of the glue outlet pipe away from the glue extraction component is located in the cavity. A plurality of through holes are opened circumferentially on the outer side wall of the cover, and the through holes are connected to the cavity.

[0010] By adopting the above technical solution, the cover covers the glue liquid sent out from the glue outlet pipe, so that the glue liquid flows out of the through hole along the set path between the cover covers and the glue outlet pipe. This reduces the fluctuation of the liquid level in the glue storage tank 2 due to the outflow of the glue liquid in the glue outlet pipe, which causes the glue liquid to jump up and flow into the space between the lining and the mold during dipping. This is beneficial to reducing the scrap rate of plastic gloves.

[0011] Optionally, the glue outlet pipe includes a main pipe provided on the glue extraction component and several branch pipes provided on the main pipe, and the several branch pipes are connected to the main pipe. The branch pipes pass through the bottom wall of the glue storage tank 2 and are connected to the glue storage tank 2, and the several branch pipes are distributed along the length direction of the glue storage tank 2, and the cover and the branch pipes correspond one to one.

[0012] By adopting the above technical solution, the glue flowing out of the glue outlet pipe can be mixed with the glue in various areas at the bottom of the second glue storage tank, which is beneficial to improving the uniformity of the glue in the second glue storage tank.

[0013] Optionally, the cover is rotatably connected to the inner pool body, and the rotation axis of the cover is vertically arranged. A turbine is coaxially provided on the cover, and the turbine extends into the branch pipe.

[0014] By adopting the above technical solution, when the glue flows out from the glue outlet pipe, the glue drives the turbine to drive the cover to rotate, so that the glue flowing out of the through hole is fully mixed with the glue in the surrounding area of ​​the cover, reducing the mixing blind area.

[0015] Optionally, a cleaning component is also included, which includes a filter bag and a mounting block provided on the filter bag, the mounting blocks are located on both sides of the filter bag opening, one of the mounting blocks is connected to the inner pool body, a threaded surface 1 is provided on the outer wall of the cover, a transmission block is provided on the inner pool body for lifting and sliding, a through-hole is provided on the transmission block, the cover is located in the through-hole, a threaded surface 2 is provided on the inner wall of the through-hole, and the other mounting block is connected to the transmission block, and when the cover rotates, the transmission block moves up so that the two mounting blocks move away from each other.

[0016] By adopting the above technical solution, when the cover rotates, driven by the glue flowing out of the through hole, a directional glue flow is formed around the cover. At the same time, the cover is threadedly connected to the transmission block through the cooperation between the thread surface one and the thread surface two, driving the transmission block to move upward until the thread surface one and the thread surface two are staggered. The position of the transmission block remains stable relative to the cover. At this time, the two mounting blocks move away from each other, thereby opening the filter pocket opening, so that the condensed colloidal particles in the glue enter the filter pocket for collection under the drive of the glue flow, thereby achieving filtration and cleaning of the glue, and reducing the condensed colloidal particles from adhering to the lining surface during dipping, thereby affecting the surface quality of the plastic gloves.

[0017] Optionally, the mounting block includes a block body and a connecting rod hinged to the block body, the connecting rod flips towards or away from the block body, the block body and the connecting rod are both connected to the edge of the filter bag, the connecting rods on the two mounting blocks are located on both sides of the filter bag opening, and an elastic member is provided on the block body, the elastic member presses against the connecting rod so that the connecting rod has a tendency to approach the block body.

[0018] By adopting the above technical solution, when the glue extraction part stops working, the transmission block moves downward under the action of gravity, and the connecting rod flips close to the block under the action of the elastic part, thereby tightening the filter bag opening between the two mounting blocks, reducing the condensed colloidal particles collected in the filter bag from leaking through the opening surrounded by the filter bag part located outside the mounting block.

[0019] Optionally, the inner pool body includes a pool body and a fixed block, the second glue storage tank is provided on the pool body, the fixed block and the transmission block correspond one to one, the fixed block is located below the transmission block, the transmission block is provided with a mounting hole one, the fixed block is provided with a mounting hole two, the block body includes a mounting portion and a snap-in portion vertically provided on the mounting portion, the connecting rod is hinged on the mounting portion, the mounting hole one and the mounting hole two are provided for the snap-in portion to be snapped in, and when the cover rotates, the fixed block / transmission block is located on one side of the mounting portion along the rotation direction of the cover.

[0020] By adopting the above technical solution, when it is necessary to clean the condensed colloidal particles collected in the filter bag, move the block so that the snap-in portion is disengaged from mounting hole one / mounting hole two, and the filter bag can be taken out from the inner pool body for cleaning. When the filter bag is cleaned, the two snap-in portions are respectively snapped into mounting hole one and mounting hole two to complete the installation of the filter bag on the inner pool body, making it more convenient to clean the filter bag. When the cover rotates, under the impact of the glue flow, the mounting portion presses against the transmission block / fixed block to prevent the filter bag from being washed away by the glue flow.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. The glue liquid circulates between the first and second glue storage tanks, improving the uniformity of the glue liquid in the second glue storage tank and inhibiting the sedimentation of the glue liquid in the second glue storage tank, making the performance of the plastic gloves obtained after the dipping process more consistent;

[0023] 2. The cover blocks the glue liquid from the glue outlet pipe, forcing it to flow out of the through-hole along the set path between the cover and the glue outlet pipe. This reduces the fluctuation of the liquid level in the glue storage tank due to the glue liquid flowing out of the glue outlet pipe, which can cause the glue liquid to flow between the lining and the mold during dipping, thus helping to reduce the defective rate of plastic gloves.

[0024] 3. When the cover rotates, the filter pocket opening is opened through the cooperation between the transmission block and the two mounting blocks, so that the condensed colloidal particles in the glue liquid are driven by the glue liquid flow to enter the filter pocket for collection, thereby filtering and cleaning the glue liquid, reducing the condensed colloidal particles from adhering to the lining surface during dipping, affecting the surface quality of the plastic gloves. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an overall schematic diagram of an embodiment of the present application.

[0026] Figure 2 This is a cross-sectional view of an embodiment of the present application.

[0027] Figure 3 for Figure 2 The enlarged view of part A in the middle mainly shows the structure of mounting hole 1 and mounting hole 2.

[0028] Figure 4 for Figure 2 The enlarged view of part B in the middle mainly shows the structure of the turbine.

[0029] Figure 5 This is a structural diagram of a partial section of the pool body according to an embodiment of the present application.

[0030] Figure 6 This is a partial structural diagram of an embodiment of the present application, mainly showing the structure of thread surface one and thread surface two.

[0031] Figure 7 This is a partial structural diagram of an embodiment of the present application, mainly showing the structure of the elastic member.

[0032] Explanation of the accompanying reference numerals: 1. Outer tank body; 11. Glue storage tank 1; 2. Inner tank body; 21. Tank body; 211. Glue storage tank 2; 22. Fixing block; 221. Mounting hole 2; 3. Glue extraction part; 4. Cleaning assembly; 41. Filter bag; 42. Mounting block; 421. Block body; 4211. Mounting portion; 4212. Snap-in portion; 422. Connecting rod; 5. Rubber inlet hose; 6. Rubber outlet hose; 61. Main pipe; 62. Branch pipe; 7. Cover; 71. Through hole; 8. Cavity; 9. Turbine; 10. Threaded surface 1; 12. Transmission block; 121. Threaded portion; 1211. Perforation; 122. Extension portion; 1221. Mounting hole 1; 13. Threaded surface 2; 14. Gap groove; 15. Elastic part. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-7 This application is described in further detail.

[0034] The present application discloses a plastic glove dipping tank. Figure 1-Figure 3 The plastic glove dipping tank includes an outer tank body 1, an inner tank body 2, a glue extraction component 3 and a cleaning component 4. The upper end surface of the outer tank body 1 is provided with a glue storage tank 11, and the inner tank body 2 includes a tank body 21 and a plurality of fixed blocks 22. The tank body 21 is located in the glue storage tank 11, and the upper end surface of the tank body 21 is provided with a glue storage tank 211. A plurality of fixed blocks 22 are located in the glue storage tank 211 and are evenly spaced along the length direction of the glue storage tank 211. The fixed blocks 22 are fixed on the inner side wall of the glue storage tank 211, and the outer side wall of the fixed block 22 is provided with a mounting hole 221. The mounting hole 221 passes through the fixed block 22 along the length direction of the glue storage tank 211.

[0035] See also Figure 1-Figure 3 , a glue inlet pipe 5 and a glue outlet pipe 6 are fixed on the glue extraction component 3, the glue inlet pipe 5 passes through the outer pool body 1 and is connected to the glue storage tank 11, and the glue inlet pipe 5 and the outer pool body 1 are fixedly connected, and the glue outlet pipe 6 includes a main pipe 61 and several branch pipes 62, the main pipe 61 is fixed on the glue extraction component 3, and the several branch pipes 62 are fixedly connected to the main pipe 61 and are connected to the main pipe 61, the number and position of the branch pipes 62 correspond one to one with the number and position of the fixed block 22, each branch pipe 62 passes through the outer pool body 1 and the bottom wall of the glue storage tank 211 and is connected to the glue storage tank 211, and the branch pipe 62 is fixedly connected to the pool body 21, the glue extraction component 3 is used to extract the glue in the glue storage tank 11 and transport it to the glue storage tank 211. In this embodiment, the glue extraction component 3 is a single-screw pump.

[0036] See also Figure 1-Figure 4A cover 7 is rotatably connected to the pool body 21. The cover 7 is located in the second glue storage tank 211, and the number and position of the cover covers 7 correspond one-to-one to the number and position of the branch pipes 62. The cover cover 7 is located above the corresponding branch pipe 62, and the rotation axis of the cover cover 7 is vertically arranged. A cavity 8 is formed between the cover cover 7 and the bottom wall of the pool body 21. The end of the branch pipe 62 away from the glue extraction part 3 is located in the cavity 8. A number of through holes 71 are evenly spaced circumferentially on the outer wall of each cover cover 7. The through holes 71 are connected to the cavity 8. A turbine 9 is coaxially fixed on each cover cover 7, and the turbine 9 extends into the corresponding branch pipe 62.

[0037] See also Figures 1-6 , a threaded surface 10 is formed on the outer wall of each cover 7, and the threaded surface 10 is located above the through hole 71. A plurality of transmission blocks 12 are provided in the pool body 21 for lifting and sliding. The number and position of the transmission blocks 12 correspond to the number and position of the fixed blocks 22. Each transmission block 12 is located above the corresponding fixed block 22. The transmission block 12 includes a threaded portion 121 and an extension portion 122. A through hole 1211 is provided on the outer wall of the threaded portion 121. The through hole 1211 vertically penetrates the threaded portion 121 The cover 7 is located in the through-hole 1211, and a threaded surface 2 13 is formed on the inner wall of the through-hole 1211 to cooperate with the threaded surface 10. The cover 7 is threadedly connected to the threaded portion 121 through the cooperation between the threaded surface 10 and the threaded surface 2 13. The extension portion 122 is located below the threaded portion 121 and is fixedly connected to the threaded portion 121. A mounting hole 1221 is provided on the outer wall of the extension portion 122, and the mounting hole 1221 passes through the extension portion 122 along the length direction of the glue storage tank 2 211.

[0038] See also Figures 1-6 The number and position of the cleaning components 4 correspond one-to-one to the number and position of the transmission blocks 12. The cleaning components 4 include a filter bag 41 and two mounting blocks 42. The filter bag 41 in this embodiment is provided with a plurality of filter holes on its surface to filter the glue and intercept the condensed colloidal particles in the glue in the filter bag 41. The inorganic filler components in the glue will pass through the filter bag 41 together with the glue.

[0039] See also Figure 1-Figure 7 The two mounting blocks 42 are respectively located on both sides of the opening of the filter bag 41. Each mounting block 42 includes a block body 421 and a connecting rod 422. The block body 421 includes a mounting portion 4211 and a snap-in portion 4212. The mounting portion 4211 is fixed to the edge of the filter bag 41. The snap-in portion 4212 is vertically fixed to the mounting portion 4211. The mounting hole 1221 and the mounting hole 221 are both for the snap-in portion 4212 to be snapped in. One of the mounting blocks 42 is connected to the corresponding transmission block 12 by snapping its snap-in portion 4212 into the mounting hole 1221, and the other mounting block 42 is connected to the pool body 21 by snapping its snap-in portion 4212 into the mounting hole 221.

[0040] See also Figure 1-Figure 7 A recess 14 is provided on the outer wall of the mounting portion 4211 near the filter pocket 41. The connecting rod 422 is located in the recess 14 and is hinged to the mounting portion 4211. The hinge axis of the connecting rod 422 is parallel to the length direction of the glue storage tank 211, and the connecting rod 422 flips to move closer to or away from the corresponding mounting portion 4211. The connecting rod 422 and the edge of the filter pocket 41 are fixedly connected. The connecting rods 422 on the two mounting portions 4211 are respectively located on both sides of the opening of the filter pocket 41. An elastic member 15 is installed on the mounting portion 4211. The elastic member 15 presses against the connecting rod 422, so that the connecting rod 422 has a tendency to move closer to the mounting portion 4211. In this embodiment, the elastic member 15 is a torsion spring.

[0041] When the glue flows out from the branch pipe 62, the glue flows through the turbine 9 to drive the turbine 9 to rotate, and the turbine 9 drives the cover 7 to rotate. Driven by the glue flowing out of the through hole 71, a directional glue flow is formed around the cover 7. At this time, the fixing block 22 / extension portion 122 is located on the side of the mounting portion 4211 along the rotation direction of the cover 7. Under the impact of the glue flow, the mounting portion 4211 presses against the fixing block 22 / extension portion 122 to prevent the filter pocket 41 from being washed away by the glue flow. The cover 7 passes through the threaded surface 11 The cooperation between 0 and the second thread surface 13 drives the threaded portion 121 to move upward until the threaded surface 10 and the second thread surface 13 are staggered, and the position of the threaded portion 121 remains stable relative to the cover 7. At this time, the two mounting blocks 42 are away from each other, and the connecting rod 422 is flipped away from the mounting portion 4211 under the traction of the filter bag 41, thereby opening the opening of the filter bag 41, so that the condensed colloidal particles in the glue liquid enter the filter bag 41 for collection under the drive of the glue liquid flow, thereby achieving filtration and cleaning of the glue liquid.

[0042] When the glue extraction component 3 stops working, the threaded portion 121 moves downward under the action of gravity, and the connecting rod 422 flips close to the mounting portion 4211 under the action of the elastic component 15, thereby tightening the opening of the filter bag 41 between the two mounting blocks 42, reducing the condensed colloidal particles collected in the filter bag 41 from leaking through the opening surrounded by the part of the filter bag 41 located outside the mounting block 42.

[0043] When it is necessary to clean the condensed colloidal particles collected in the filter bag 41, move the mounting portion 4211 so that the snap-in portion 4212 is disengaged from the mounting hole 1 1221 / mounting hole 2 221, and the filter bag 41 can be taken out from the inner pool body 2 for cleaning. When the filter bag 41 is cleaned, the two snap-in portions 4212 are respectively snapped into the mounting hole 1 1221 and the mounting hole 2 221 to complete the installation of the filter bag 41 on the inner pool body 2, making it more convenient to clean the filter bag 41.

[0044] The implementation principle of a plastic glove dipping tank in the embodiment of the present application is as follows:

[0045] When the glue liquid settles, the concentration of the glue liquid in the second glue storage tank 211 gradually increases from top to bottom, and the glue liquid near the slot in the second glue storage tank 211 overflows and flows into the first glue storage tank 11. The glue extraction component 3 extracts the glue in the first glue storage tank 11 and transports it to the bottom of the second glue storage tank 211, so that the glue liquid with lower concentration near the slot in the second glue storage tank 211 is mixed with the glue liquid with higher concentration at the bottom of the second glue storage tank 211. Due to the injection of glue, the glue liquid near the slot in the second glue storage tank 211 will continuously overflow and flow into the first glue storage tank 11, and the glue in the first glue storage tank 11 is continuously transported to the bottom of the second glue storage tank 211 by the glue extraction component 3, so that the glue liquid circulates between the first glue storage tank 11 and the second glue storage tank 211, thereby improving the uniformity of the glue liquid in the second glue storage tank 211, inhibiting the glue liquid in the second glue storage tank 211 from settling, and making the performance of the plastic gloves obtained after the dipping process more consistent.

[0046] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A plastic glove dipping tank, characterized by: The invention comprises an outer pool body (1), an inner pool body (2) and a glue extraction part (3), wherein the outer pool body (1) is provided with a glue storage tank 1 (11), the inner pool body (2) is provided with a glue storage tank 2 (211), the inner pool body (2) is located in the glue storage tank 1 (11), the glue extraction part (3) is provided with a glue inlet pipe (5) and a glue outlet pipe (6), the glue inlet pipe (5) is connected to the glue storage tank 1 (11), the glue outlet pipe (6) passes through the bottom wall of the glue storage tank 2 (211) and is connected to the glue storage tank 2 (211), and the glue extraction part (3) is used to extract the glue liquid in the glue storage tank 1 (11) and transport it to the glue storage tank 2 (211).

2. The plastic glove dipping tank according to claim 1, characterized in that: The inner pool body (2) is provided with a cover (7), and the cover (7) is located in the second glue storage tank (211) and above the glue outlet pipe (6). A cavity (8) is formed between the cover (7) and the inner pool body (2), and the end of the glue outlet pipe (6) away from the glue extraction part (3) is located in the cavity (8). The outer side wall of the cover (7) is circumferentially opened with a plurality of through holes (71), and the through holes (71) are connected to the cavity (8).

3. The plastic glove dipping tank according to claim 2, characterized in that: The glue outlet pipe (6) includes a main pipe (61) provided on the glue extraction component (3) and a plurality of branch pipes (62) provided on the main pipe (61), and the plurality of branch pipes (62) are all connected to the main pipe (61). The branch pipes (62) pass through the bottom wall of the second glue storage tank (211) and are connected to the second glue storage tank (211), and the plurality of branch pipes (62) are distributed along the length direction of the second glue storage tank (211), and the cover (7) and the branch pipes (62) correspond one to one.

4. The plastic glove dipping tank according to claim 3, characterized in that: The cover (7) is rotatably connected to the inner pool body (2), and the rotation axis of the cover (7) is vertically arranged. A turbine (9) is coaxially arranged on the cover (7), and the turbine (9) extends into the branch pipe (62).

5. The plastic glove dipping tank according to claim 4, characterized in that: The invention also includes a cleaning assembly (4), the cleaning assembly (4) including a filter bag (41) and a mounting block (42) provided on the filter bag (41), the mounting blocks (42) being located on both sides of the opening of the filter bag (41), one of the mounting blocks (42) being connected to the inner pool body (2), the outer side wall of the cover (7) being provided with a threaded surface (10), a transmission block (12) being provided on the inner pool body (2) for lifting and sliding, a through hole (1211) being provided on the transmission block (12), the cover (7) being located in the through hole (1211), the inner wall of the through hole (1211) being provided with a threaded surface (13) matching the threaded surface (10), the other mounting block (42) being connected to the transmission block (12), and when the cover (7) is rotated, the transmission block (12) is moved upward so that the two mounting blocks (42) are separated from each other.

6. The plastic glove dipping tank according to claim 5, characterized in that: The mounting block (42) comprises a block body (421) and a connecting rod (422) hinged on the block body (421); the connecting rod (422) flips to move closer to or away from the block body (421); the block body (421) and the connecting rod (422) are both connected to the edge of the filter bag (41); the connecting rods (422) on the two mounting blocks (42) are located on both sides of the opening of the filter bag (41); an elastic member (15) is provided on the block body (421); the elastic member (15) presses against the connecting rod (422), so that the connecting rod (422) has a tendency to move closer to the block body (421).

7. The plastic glove dipping tank according to claim 6, characterized in that: The inner pool body (2) includes a pool body (21) and a fixed block (22), the second glue storage tank (211) is provided on the pool body (21), the fixed block (22) and the transmission block (12) correspond one to one, the fixed block (22) is located below the transmission block (12), the transmission block (12) is provided with a first mounting hole (1221), the fixed block (22) is provided with a second mounting hole (221), the block body (421) includes a mounting portion (4211) and a snap-in portion (4212) vertically provided on the mounting portion (4211), the connecting rod (422) is hinged to the mounting portion (4211), the first mounting hole (1221) and the second mounting hole (221) are provided for the snap-in portion (4212) to be snapped in.

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