An accessory bag turning conveyor

Abstract

The application discloses a kind of accessory bag steering conveying devices, it is related to conveying technical field, including main conveying device and accessory conveying device, accessory conveying device is used to convey accessory paper shell, one side of accessory conveying device is provided with discharge tank, mobile device is provided on accessory conveying device, lifting device is provided on mobile device, the bottom of lifting device is provided with adsorption structure, the accessory paper shell in the discharge tank is adsorbed by adsorption structure, and is transported to accessory conveying device using mobile device, releases accessory paper shell to point-by-point bearing structure in the process of transport, again by lateral extrusion structure and conveying extrusion structure adjustment posture of accessory paper shell, again by adsorption structure for adsorption, subsequently point-by-point bearing structure moves upward by telescopic device, finally by lifting device drive adsorption structure to accessory conveying device and release accessory paper shell, ensure that posture of accessory paper shell meets requirements when being transported to accessory conveying device.

Description

Technical Field

[0001] This invention relates to the field of conveying technology, and more specifically to a device for turning and conveying accessory bags. Background Technology

[0002] A packaging box is a box used to package products. These boxes can be made of cardboard or wood and are used to ensure product safety during transport and to enhance the product's perceived quality. Cardboard boxes are the most common type. Inside the packaging box, there is usually a user manual and warranty card. The manual, product, and accessories are placed together inside the box. However, the manual and accessories are often randomly placed inside, which is not only unsightly but also makes them easy to lose after use. Therefore, accessory pockets are provided in the packaging box to hold the manual and accessories.

[0003] Generally, cardboard used in packaging box production is transported via conveyor belts. For example, the invention patent with publication number CN116281287A discloses a conveyor device for the production of environmentally friendly packaging boxes. This device uses a motor to drive a rotating rod to rotate clockwise, thereby adjusting the height of the tension roller. This causes the tension roller to press upwards against the lower surface of the conveyor belt, adjusting the belt tension to ensure its normal operation. A dual-shaft motor drives two worm gears to rotate synchronously, and then two worm wheels meshing with them drive two bidirectional threaded rods to rotate synchronously. This causes two opposing adjusting rods to move in opposite directions along the guide rod, changing the distance between the two adjusting plates. This allows for the transport of cardboard of different widths, increasing the device's applicability. It is mainly used for transporting cardboard used in packaging box production. For cardboard needed for accessory bag production, the cardboard is typically neatly stacked in a container. The conveyor device sequentially picks up the cardboard from top to bottom and transfers it to the accessory bag conveyor. The cardboard is then processed, such as pre-folding, before being transferred to the packaging box production line to combine the cardboard for the accessory bags with the cardboard for the main body of the packaging box.

[0004] The above method of transferring the cardboard used for accessory bags from the container to the conveyor device still has the following problems: The conveyor device that transports the cardboard before pre-folding the accessory bags has a width limit, that is, the two sides of the conveyor device have raised side plates to ensure that the position of the cardboard does not shift during the transport to the pre-folding process. However, the cardboard is only transported by suction during the transfer. Although the cardboard is stacked neatly, the vibration of the machine during use may cause the cardboard to become misaligned. Therefore, it cannot be guaranteed that the cardboard's posture on the horizontal plane is in compliance with the requirements when it is suctioned and transferred. The placement angle of the cardboard may be deflected, which may cause the cardboard to get stuck on the conveyor device. It may also cause the pre-folding position of the cardboard to be incorrect, affecting the production quality of the packaging box. Summary of the Invention

[0005] The purpose of this invention is to provide a component bag turning and conveying device, which solves the technical problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0007] A component bag turning and conveying device includes a main conveying device and a component conveying device. The main conveying device is used to convey the main cardboard body, and the component conveying device is used to convey the component cardboard body. The conveying directions of the main conveying device and the component conveying device are perpendicular to each other. A material box for holding component cardboard body is provided on one side of the component conveying device. A moving device is provided on the component conveying device, and a lifting device is provided on the moving device. An adsorption structure is provided at the bottom of the lifting device, and a telescopic device is provided on the adsorption structure. A connecting plate is provided on the telescopic device, and a winding structure is provided at the top of the connecting plate. A bendable point-bearing structure is provided at the bottom of the connecting plate. The point-bearing structure includes multiple vertical plates vertically arranged at the bottom of the connecting plate. Multiple transverse extrusion structures are provided on the point-bearing structure, and a vertical extrusion structure is provided on the adsorption structure.

[0008] The transverse extrusion structure includes a horizontal air pipe set on a vertical plate. A square sliding hole is opened on the vertical plate. A sliding column is slidably connected in the square sliding hole. A push plate is set at the end of the sliding column. A spring is slidably sleeved on the sliding column. The two ends of the spring are respectively connected to the push plate and the vertical plate. The horizontal air pipe is used to blow the push plate on the horizontal surface to extrude the accessory housing.

[0009] The vertical extrusion structure includes multiple vertical air pipes disposed on the horizontal plate.

[0010] As a preferred embodiment of the present invention, the plurality of vertical plates are divided into four groups, and the four groups of vertical plates are arranged in a rectangular arrangement with each other perpendicularly. The bottom of each vertical plate is rotatably connected to a support plate by a torsion spring, and the winding structure is connected to the plurality of support plates.

[0011] As a preferred embodiment of the present invention, the adsorption structure includes a horizontal plate disposed at the bottom of the lifting device, and the bottom of the horizontal plate is provided with a plurality of suction cups for adsorbing the paper shell of the accessory.

[0012] As a preferred embodiment of the present invention, the winding structure includes a plurality of winding rollers rotatably disposed on the top of the connecting plate, each of the winding rollers having a traction rope wound on it, and the plurality of traction ropes being connected to the point bearing structure.

[0013] In a preferred embodiment of the present invention, each of the traction ropes is connected to the ends of multiple support plates. When the support plate is not subjected to the traction force of the traction rope, the support plate is in a horizontal state, and the transverse compression structure is provided on two adjacent sets of vertical plates.

[0014] In a preferred embodiment of the present invention, the vertical plate includes a plate body vertically disposed at the bottom of the connecting plate. A rotating groove is provided at the bottom of the plate body, and the support plate is rotatably connected to the inner wall of the rotating groove by a torsion spring. A connecting rod is rotatably connected at the connection between the rotating groove and the bottom of the plate body, and the traction rope is connected to the corresponding end of the support plate via the connecting rod. The distance between the connecting rod and the bottom of the rotating groove is greater than the length of the support plate.

[0015] As a preferred embodiment of the present invention, a horizontal magnetic block is provided in the rotating groove, and the support plate is magnetically attracted to the magnetic block when the support plate is in a horizontal state. The magnetic block is located between the support plate and the inner wall of the rotating groove.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] This invention uses an adsorption structure to adsorb the cardboard parts in the feeding box and a moving device to transfer them to the parts conveying device. During the transfer, the cardboard parts are released onto the distribution point support structure. Then, the transverse extrusion structure and the conveying extrusion structure adjust the posture of the cardboard parts, and the adsorption structure re-adsorbs them. Subsequently, the distribution point support structure moves upward through a telescopic device, and finally, a lifting device drives the adsorption structure to the parts conveying device to release the cardboard parts. This ensures that the posture of the cardboard parts meets the requirements when transferred to the parts conveying device, avoids incorrect pre-folding positions during the pre-folding process, and guarantees the production quality of the packaging boxes. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] Figure 1 This invention provides a schematic diagram of the overall structure of an accessory bag turning and conveying device according to an embodiment of the present invention. Figure 1 ;

[0020] Figure 2 This is a partial structural schematic diagram of an accessory bag turning and conveying device provided in an embodiment of the present invention;

[0021] Figure 3This invention provides a schematic diagram of the overall structure of an accessory bag turning and conveying device according to an embodiment of the present invention. Figure 2 ;

[0022] Figure 4 Provided for embodiments of the present invention Figure 2 An enlarged structural diagram of part A shown in the figure;

[0023] Figure 5 Provided for embodiments of the present invention Figure 2 The structure of part B shown in the diagram is an enlarged schematic.

[0024] Figure 6 Provided for embodiments of the present invention Figure 3 The structure of section C shown in the diagram is an enlarged schematic.

[0025] Figure 7 Provided for embodiments of the present invention Figure 3 The structure of section D shown is an enlarged schematic diagram.

[0026] The labels in the diagram represent the following:

[0027] 1. Main conveying device; 2. Parts conveying device; 3. Discharge box; 4. Vertical extrusion structure; 5. Moving device; 6. Lifting device; 7. Adsorption structure; 8. Telescopic device; 9. Connecting plate; 10. Winding structure; 11. Point bearing structure; 12. Transverse extrusion structure;

[0028] 401. Vertical air pipe; 701. Horizontal plate; 702. Suction cup; 101. Take-up roller; 102. Traction rope; 111. Vertical plate; 112. Support plate; 113. Connecting rod; 114. Plate body; 115. Rotating groove; 116. Magnetic block; 121. Horizontal air pipe; 122. Square sliding hole; 123. Sliding column; 124. Push plate; 125. Spring. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] like Figures 1 to 7As shown, the present invention provides a component bag turning and conveying device, including a main conveying device 1 and a component conveying device 2. The main conveying device 1 is used to convey the main body paper shell, and the component conveying device 2 is used to convey the component paper shell. The conveying directions of the main conveying device 1 and the component conveying device 2 are perpendicular to each other. The device is characterized in that a feeding box 3 for holding component paper shells is provided on one side of the component conveying device 2, a moving device 5 is provided on the component conveying device 2, a lifting device 6 is provided on the moving device 5, an adsorption structure 7 is provided at the bottom of the lifting device 6, a telescopic device 8 is provided on the adsorption structure 7, a connecting plate 9 is provided on the telescopic device 8, a winding structure 10 is provided at the top of the connecting plate 9, and a bendable point-bearing structure 11 is provided at the bottom of the connecting plate 9. The point-bearing structure 11 includes multiple vertical plates 111 vertically arranged at the bottom of the connecting plate 9, multiple transverse extrusion structures 12 are provided on the point-bearing structure 11, and a vertical extrusion structure 4 is provided on the adsorption structure 7.

[0031] In use, the main conveying device 1 is used to convey the main cardboard shell of the production packaging box or gift box, and the accessory conveying device 2 conveys the accessory cardboard shell for the production of accessory bags on the packaging box or gift box. The accessory cardboard shell is stacked in the feeding box 3, and then it is fixed by the adsorption structure 7. Then the lifting device 6 drives the adsorption structure 7 to move upward, and then the moving device 5 drives the lifting device 6 to move the accessory cardboard shell onto the accessory conveying device 2.

[0032] Because the accessory conveying device 2 has limiting side plates on both sides during use to ensure that the accessory cardboard is transported between the two side plates, and to ensure accurate positioning for processing the accessory cardboard in the next process, such as accurate pre-folding position when pre-folding the accessory cardboard, after the adsorption structure 7 adsorbs and fixes the accessory cardboard, the telescopic device 8 drives the connecting plate 9 to move downward until the height of the dividing point bearing structure 11 is less than the height of the accessory cardboard. The winding structure 10 releases the traction on the dividing point bearing structure 11, causing the dividing point bearing structure 11 to bend into a horizontal shape. Then, the adsorption structure 7 releases the adsorption on the accessory cardboard, and the accessory cardboard falls onto the dividing point bearing structure 11. Subsequently, the vertical extrusion structure 4 extrudes the accessory cardboard downward in the vertical direction. The cardboard shell is placed horizontally, and then the transverse extrusion structure 12 pushes the cardboard shell along its length and width, causing it to move to the corresponding position on the point-support structure 11. The point-support structure 11 positions the cardboard shell. Finally, the telescopic device 8 drives the connecting plate 9 to move the point-support structure 11 upward until the cardboard shell contacts the adsorption structure 7. The adsorption structure 7 then adsorbs and fixes the cardboard shell. Subsequently, the winding structure 10 pulls the point-support structure 11 to rotate, changing it from a bent state to a vertical state to release the load on the cardboard shell. The cardboard shell then moves upward with the telescopic device 8, avoiding interference with the transportation and release of the cardboard shell.

[0033] The position of the accessory cardboard is adjusted by the horizontal extrusion structure 12 and the vertical extrusion structure 4, and the position of the accessory cardboard is re-fixed by the adsorption structure 7. This ensures that the accessory cardboard can be accurately released to the corresponding position on the accessory conveying device 2, and prevents the accessory cardboard from deviating in position during subsequent processing such as pre-folding, thereby ensuring the production quality of the packaging box.

[0034] In this embodiment, both the main conveying device 1 and the accessory conveying device 2 are existing technologies. For example, the main conveying device 1 is a belt conveyor, and the accessory conveying device 2 includes two strip-shaped support plates. A first motor drives a first screw to move below the strip-shaped support plates. A base is provided on the screw, and a hydraulic telescopic rod or an electric push rod is provided on the base. A push plate is provided on the hydraulic telescopic rod. The strip-shaped support plates are installed on the ground by a bracket. Flat plates are provided at the conveying ends of the two strip-shaped support plates for pre-folding. The accessory cardboard is pushed to the flat plate by the push plate, and then moved to the main conveying device 1 by a robotic arm (not shown in the figure) for subsequent processing. The technical principle will not be elaborated further.

[0035] The moving device 5, lifting device 6, and telescopic device 8 are all existing technologies. For example, the moving device 5 is driven by a second motor to rotate the second screw, the lifting device 6 is driven by a third motor to rotate the third screw and drive the mounting base to move up and down, and the telescopic device 8 is a hydraulic push rod or an electric push rod, etc. The technical principles will not be elaborated further.

[0036] Furthermore, an air nozzle can be provided at the feeding box 3 to blow the accessory cardboard, so that multiple accessory cardboards are separated. A strip groove is provided at the feeding box 3 to allow the airflow blown out by the air nozzle to pass through.

[0037] The adsorption structure 7 includes a horizontal plate 701 disposed at the bottom of the lifting device 6, and a plurality of suction cups 702 for adsorbing the paper shell of the accessory are disposed at the bottom of the horizontal plate 701.

[0038] The lifting device 6 drives the horizontal plate 701 to move multiple suction cups 702 up and down. The suction cups 702 use a pump to draw air to adsorb and fix or release the cardboard of the accessories.

[0039] Multiple suction cups 702 are connected to an external pump body (not shown in the attached figure) to draw in or supply gas.

[0040] The winding structure 10 includes a plurality of winding rollers 101 rotatably disposed on the top of the connecting plate 9, each winding roller 101 having a traction rope 102 wound on it, and the plurality of traction ropes 102 being connected to the point bearing structure 11.

[0041] Multiple vertical plates 111 are divided into four groups, and the four groups of vertical plates 111 are arranged in a rectangular pattern with each pair perpendicular to the other. The bottom of each vertical plate 111 is rotatably connected to a support plate 112 by a torsion spring, and the winding structure 10 is connected to multiple support plates 112.

[0042] Each traction rope 102 is connected to the end of multiple support plates 112. When the support plate 112 is not subjected to the traction force of the traction rope 102, the support plate 112 is in a horizontal state, and the transverse compression structure 12 is set on two adjacent sets of vertical plates 111.

[0043] The winding roller 101 is driven to rotate by a drive device such as a fourth motor to wind up or release the traction rope 102, thereby causing the support plate 112 to rotate. This releases the support plate 112 from the load on the accessory paper shell, or releases the restriction on the support plate 112, so that the support plate 112 rotates to a horizontal state under the elastic force of the torsion spring to support the accessory paper shell.

[0044] The support plate 112 supports or releases the support of the accessory paper shell by rotating, so that the support plate 112 will not interfere with the accessory paper shell during rotation, thus avoiding disturbing the position of the accessory paper shell again after the position of the accessory paper shell has been adjusted.

[0045] The vertical plate 111 is used to provide support for the support plate 112.

[0046] Multiple vertical plates 111 are divided into four groups and form a rectangle to fit the shape of the accessory cardboard shell, so that multiple support plates 112 can stably support the accessory cardboard shell from the bottom and all sides.

[0047] The end of the traction rope 102 that pulls the support plate 112 is the end of the support plate 112 located below the accessory paper shell when it carries the accessory paper shell.

[0048] The vertical plate 111 includes a plate body 114 vertically disposed at the bottom of the connecting plate 9. A rotating groove 115 is provided at the bottom of the plate body 114, and a support plate 112 is rotatably connected to the inner side wall of the rotating groove 115 by a torsion spring. A connecting rod 113 is rotatably connected at the connection between the rotating groove 115 and the bottom of the plate body 114, and a traction rope 102 is connected to the end of the corresponding support plate 112 via the connecting rod 113. The distance between the connecting rod 113 and the bottom of the rotating groove 115 is greater than the length of the support plate 112.

[0049] By setting a rotating groove 115 to accommodate the support plate 112, interference between the support plate 112 and the horizontal plate 701 is avoided when the support plate 112 moves up and down.

[0050] The connecting rod 113 acts as a steering wheel for the traction rope 102, enabling the support plate 112 to rotate more smoothly when pulled by the traction rope 102, and reducing frictional damage to the traction rope 102.

[0051] A horizontal magnetic block 116 is provided in the rotating groove 115, and the magnetic block 116 is magnetically attracted to the support plate 112 when the support plate 112 is in a horizontal state. The magnetic block 116 is located between the support plate 112 and the inner wall of the rotating groove 115.

[0052] The magnetic block 116 is used to limit the rotation angle of the support plate 112, so that the support plate 112 is in a horizontal state after rotation, and the magnetic force of the magnetic block 116 limits the rotation of the support plate 112, thereby further improving the stability of the support plate 112 in the process of carrying the accessory paper shell.

[0053] The transverse extrusion structure 12 includes a horizontal air pipe 121 disposed on a vertical plate 111. A square sliding hole 122 is provided on the vertical plate 111. A sliding column 123 is slidably connected in the square sliding hole 122. A push plate 124 is provided at the end of the sliding column 123. A spring 125 is slidably sleeved on the sliding column 123. The two ends of the spring 125 are respectively connected to the push plate 124 and the vertical plate 111. The horizontal air pipe 121 is used to blow the push plate 124 on the horizontal surface to extrude the accessory housing.

[0054] The vertical extrusion structure 4 includes multiple vertical air pipes 401 disposed on the horizontal plate 701.

[0055] When the accessory cardboard is located on multiple support plates 112, multiple vertical air pipes 401 are connected to an external first air pump (not shown in the attached figure). The first air pump supplies air to the multiple vertical air pipes 401, and the airflow ejected from the multiple vertical air pipes 401 causes the accessory cardboard to be subjected to downward pressure and become horizontal.

[0056] Multiple horizontal air pipes 121 are connected to an external second air pump (not shown in the attached figure). The second air pump supplies air to the multiple horizontal air pipes 121. The multiple horizontal air pipes 121 spray air to push the corresponding push plate 124 to move, and drive the corresponding slide column 123 to move synchronously. The spring 125 is stretched. The adjacent sides of the accessory paper shell are pushed by the multiple push plates 124, thereby moving on the support plate 112. For example, some of the push plates 124 push the accessory paper shell to move along the length direction of the accessory paper shell, so that the accessory paper shell moves to abut against the side of the multiple vertical plates 111 on the corresponding side. Other push plates 124 push the accessory paper shell to move along the width direction of the accessory paper shell, so that the accessory paper shell moves to abut against the side of the multiple vertical plates 111 on the adjacent side.

[0057] Multiple transverse extrusion structures 12 are arranged on two adjacent sets of vertical plates 111, so the accessory paper shell contacts the other two sets of adjacent vertical plates 111, thereby completing the adjustment of the position of the accessory paper shell. Then, the telescopic device 8 drives multiple support plates 112 to move upward until the accessory paper shell contacts the suction cup 702, so that the multiple suction cups 702 re-adhere and fix the accessory paper shell. Then, the winding structure 10 drives the support plate 112 to rotate to a vertical state through the traction rope 102. The telescopic device 8 then drives the support plate 112 to move upward until the height of the support plate 112 is higher than the height of the horizontal plate 701, so as to avoid interference with the transportation and release of the accessory paper shell.

[0058] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A component bag turning and conveying device, comprising a main conveying device (1) and a component conveying device (2), wherein the main conveying device (1) is used to convey the main body cardboard, and the component conveying device (2) is used to convey the component cardboard, and the conveying directions of the main conveying device (1) and the component conveying device (2) are perpendicular to each other, characterized in that, The accessory conveying device (2) is provided with a feeding box (3) for holding accessory cardboard on one side. The accessory conveying device (2) is provided with a moving device (5). The moving device (5) is provided with a lifting device (6). The bottom of the lifting device (6) is provided with an adsorption structure (7). The adsorption structure (7) is provided with a telescopic device (8). The telescopic device (8) is provided with a connecting plate (9). The top of the connecting plate (9) is provided with a winding structure (10). The bottom of the connecting plate (9) is provided with a bendable point bearing structure (11). The point bearing structure (11) includes multiple vertical plates (111) vertically arranged at the bottom of the connecting plate (9). The point bearing structure (11) is provided with multiple transverse extrusion structures (12). The adsorption structure (7) is provided with a vertical extrusion structure (4). The winding structure (10) includes a plurality of winding rollers (101) rotatably disposed on the top of the connecting plate (9), each of the winding rollers (101) having a traction rope (102) wound on it, and the plurality of traction ropes (102) being connected to the point bearing structure (11). The transverse extrusion structure (12) includes a horizontal air pipe (121) disposed on a vertical plate (111). A square sliding hole (122) is provided on the vertical plate (111). A sliding column (123) is slidably connected in the square sliding hole (122). A push plate (124) is provided at the end of the sliding column (123). A spring (125) is slidably sleeved on the sliding column (123). The two ends of the spring (125) are respectively connected to the push plate (124) and the vertical plate (111). The horizontal air pipe (121) is used to blow the push plate (124) on the horizontal surface to extrude the accessory housing. The vertical extrusion structure (4) includes multiple vertical air pipes (401) arranged on the horizontal plate (701). The multiple vertical air pipes (401) are all connected to an external first air pump. The first air pump supplies air to the multiple vertical air pipes (401). The air jet from the multiple vertical air pipes (401) causes the accessory paper shell to be subjected to downward pressure and become horizontal.

2. The accessory bag turning and conveying device according to claim 1, characterized in that, The multiple vertical plates (111) are divided into four groups, and the four groups of vertical plates (111) are arranged in a rectangular shape with each pair perpendicular to each other. The bottom of each vertical plate (111) is rotatably connected to a support plate (112) by a torsion spring, and the winding structure (10) is connected to the multiple support plates (112).

3. The accessory bag turning and conveying device according to claim 1, characterized in that, The adsorption structure (7) includes a horizontal plate (701) disposed at the bottom of the lifting device (6), and the bottom of the horizontal plate (701) is provided with a plurality of suction cups (702) for adsorbing the paper shell of the accessory.

4. The accessory bag turning and conveying device according to claim 1, characterized in that, Each of the traction ropes (102) is connected to the end of a plurality of support plates (112). When the support plate (112) is not subjected to the traction force of the traction rope (102), the support plate (112) is in a horizontal state, and the transverse compression structure (12) is provided on two adjacent sets of vertical plates (111).

5. The accessory bag turning and conveying device according to claim 2, characterized in that, The vertical plate (111) includes a plate body (114) vertically disposed at the bottom of the connecting plate (9). The bottom of the plate body (114) is provided with a rotating groove (115), and the support plate (112) is rotatably connected to the inner wall of the rotating groove (115) by a torsion spring. A connecting rod (113) is rotatably connected at the connection between the rotating groove (115) and the bottom of the plate body (114), and the traction rope (102) is connected to the end of the corresponding support plate (112) via the connecting rod (113). The distance between the connecting rod (113) and the bottom of the rotating groove (115) is greater than the length of the support plate (112).

6. The accessory bag turning and conveying device according to claim 5, characterized in that, A horizontal magnetic block (116) is provided in the rotating groove (115), and the magnetic block (116) is magnetically attracted to the support plate (112) when the support plate (112) is in a horizontal state. The magnetic block (116) is located between the support plate (112) and the inner wall of the rotating groove (115).

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