An electronic temperature control module of a door body convenient to maintain

Abstract

This invention discloses a convenient-to-maintain electronic temperature control module for doors, relating to the field of commercial display cabinets. It includes a cabinet body with a door installed on one side, and an electronic temperature control component mounted on the top of one side of the door. In this invention, the first and second rotating sleeves are fixed by the cooperation between a fixing block and a slot, and simultaneously by the engagement between a ratchet and a pawl. This facilitates the fixed installation of the decorative cover and allows for quick disassembly and installation when replacing the control wire, improving ease of use. The electronic temperature control component is placed inside the door, and the insertion plate contacts the positioning plate. The positioning plate pushes the insertion plate outwards towards the electronic temperature control component, and the insertion plate inserts into the positioning plate, thus securing the electronic temperature control component inside the door. The meshing of a gear and a rack drives the rack to move, and the cooperation between two clamping plates allows for the clamping and removal of the control wire, thereby positioning the control wire.

Description

Technical Field

[0001] This invention relates to the field of commercial display cabinet technology, specifically to an electronic temperature control module for the door that is easy to maintain. Background Technology

[0002] Commercial display cases are insulated cabinets with functions such as freezing, refrigeration, preservation, and display. Their refrigeration system mainly consists of a compressor, condenser, capillary tube, evaporator, and refrigerant. The temperature inside the cabinet is controlled by an electronic temperature control module.

[0003] In the prior art, such as the Chinese patent CN216220990U "A Display Cabinet with Multiple Alarm Functions", a display cabinet body is included, with a cabinet door hinged to the display cabinet body. A heat dissipation plate is provided on the back of the display cabinet body, and the heat dissipation plate is fixedly connected to the display cabinet body by a support frame. The heat dissipation plate and the back of the display cabinet body form a ventilation channel. A baffle is provided above the cabinet door, and the baffle is fixedly connected to the display cabinet body. A temperature sensor is embedded in the baffle. A control room is provided at the bottom of the display cabinet body. A compressor and a temperature controller UPS are provided in the control room. A front baffle is provided below the cabinet door, and the front baffle is fixedly connected to the side of the control room. An electronic temperature controller is embedded in the front baffle. The electronic temperature controller includes a display screen and a timing module. The display screen is fixed on the upper surface of the front baffle. A power socket is provided below the heat dissipation plate, and the power socket is embedded in the control room.

[0004] As in the aforementioned patent, installing the electronic temperature control component on the glass door requires pre-embedding the control wire inside during the glass door manufacturing process. The electronic temperature control component and control wire cannot be disassembled. The control wire passes through the hinge hole and is led to the housing. However, when opening and closing the door, the wire rotates and rubs inside the hinge hole, which can easily cause damage. Summary of the Invention

[0005] The purpose of this invention is to provide a door electronic temperature control module that is easy to maintain, in order to solve the problem mentioned in the background art that when installing electronic temperature control components on glass doors, the control wires need to be pre-embedded inside during the glass door production process, and the electronic temperature control components and control wires cannot be disassembled. The control wires are led out from the hinge hole to the housing, but when the door is opened and closed, the wires rotate and rub inside the hinge hole, which can easily cause damage.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a door electronic temperature control module for easy maintenance, comprising a cabinet, a door installed on one side of the cabinet, an electronic temperature control component disposed on the top of one side of the door, a first rotating sleeve fixedly connected to one side of the electronic temperature control component, slots being formed on both sides of one end of the first rotating sleeve, a fixing block being slidably connected inside the slots, a second rotating sleeve being fixedly connected to one end of the fixing block, a ratchet being fixedly connected to one end of the second rotating sleeve, a first connecting shaft being fixedly connected to the middle of the ratchet, a decorative cover being rotatably connected to the outside of the first connecting shaft, a turntable being fixedly connected to one end of the first connecting shaft passing through the decorative cover, a pawl being movably connected to the outside of the ratchet, a second connecting shaft being fixedly connected to one end of the pawl, a decorative cover being rotatably connected to the outside of the second connecting shaft, a second positioning component being fixedly connected to one end of the second connecting shaft passing through the decorative cover, and the second positioning component being movably connected to the decorative cover.

[0007] Preferably, telescopic rods are fixedly connected to both sides of the decorative cover, and a push plate is fixedly connected to one end of each telescopic rod.

[0008] Preferably, a locking block is attached to one side of the push plate, and the locking block is fixedly connected to the bottom inner side of the door.

[0009] Preferably, a second spring is fixedly connected to both sides of the decorative cover, one end of the second spring is fixedly connected to one side of the push plate, and the second spring is sleeved on the outside of the telescopic rod.

[0010] Preferably, a fixing frame is fixedly connected to one side of the electronic temperature control component, a first spring is fixedly connected to one side of the fixing frame, a plug plate is fixedly connected to one end of the first spring, a positioning plate is movably connected to one side of the plug plate, and the positioning plate is fixedly connected to the bottom inner side of the door.

[0011] Preferably, a first guide post is slidably connected to one side of the plug plate, and the two ends of the first guide post are respectively fixedly connected to the two sides of the fixing frame, and the first spring is sleeved on the outside of the first guide post.

[0012] Preferably, a lead wire plate is fixedly connected to the inner side of the door body, and a control wire is snapped onto the outer side of the lead wire plate.

[0013] Preferably, clamping plates are provided on both outer sides of the control line. A connecting plate is fixedly connected to one side of the clamping plate, and a fixing box is provided on one side of the connecting plate. The fixing box is fixedly connected to the bottom inner side of the door. Second guide posts are fixedly connected to both sides of the top of the fixing box. The second guide posts are slidably connected to the clamping plate. A rack is fixedly connected to one side of the connecting plate through the fixing box. A slide groove is slidably connected to one side of the rack. The slide groove is opened on one side of the fixing box.

[0014] Preferably, a gear meshes with the other side of the rack, a rotating shaft is fixedly connected to the middle of the gear, one end of the rotating shaft is rotatably connected to one side of the fixed box, and the other end of the rotating shaft passes through the fixed box and is fixedly connected to a first positioning component, which is movably connected to one side of the fixed box.

[0015] Preferably, both the second positioning component and the first positioning component include a rotating plate, a connecting block, and a third spring. One side of the rotating plate is slidably connected to the outside of the connecting block, one end of the third spring is fixedly connected to one side of the rotating plate, and the other end of the third spring is fixedly connected to the connecting block.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. In this invention, the first rotating sleeve and the second rotating sleeve are fixed by the cooperation between the fixing block and the slot, and the ratchet and the pawl are engaged. This makes it easy to fix the position of the decorative cover and to quickly disassemble and install the decorative cover when changing the control line without disassembling the door body, thus improving the convenience of use.

[0018] 2. In this invention, the electronic temperature control component is placed inside the door body, the plug-in plate contacts the positioning plate, and the positioning plate pushes the plug-in plate to the outside of the electronic temperature control component. Through the sliding connection between the plug-in plate and the first guide post, the movement of the plug-in plate pushes the first spring to compress. When the plug-in plate moves with the electronic temperature control component to contact the through hole opened on the positioning plate, the elastic force of the first spring pushes the plug-in plate to move, and the plug-in plate is inserted into the positioning plate, thereby locking the electronic temperature control component inside the door body.

[0019] 3. In this invention, the meshing between the gear and the rack drives the rack to move. The rack moves on the sliding groove of the sliding connection, which can fix the movement path of the rack. The movement of the rack drives the connecting plate and the clamping plate to move in sequence. The clamping plate moves on the second guide post of the sliding connection, which makes the movement of the clamping plate more stable. The two clamping plates cooperate to clamp and remove the control line, thereby positioning the control line. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a door electronic temperature control module that is easy to maintain according to the present invention;

[0021] Figure 2 This is a first three-dimensional structural diagram of the installation of the electronic temperature control component of the door electronic temperature control module for easy maintenance according to the present invention.

[0022] Figure 3This is a schematic diagram of the second three-dimensional structure of the electronic temperature control component of the door electronic temperature control module for easy maintenance according to the present invention.

[0023] Figure 4 This is a schematic diagram of the disassembly structure of the electronic temperature control component of the door electronic temperature control module that is easy to maintain according to the present invention.

[0024] Figure 5 This invention provides a convenient maintenance electronic temperature control module for doors. Figure 4 A magnified schematic diagram of the structure at point A;

[0025] Figure 6 This invention provides a convenient maintenance electronic temperature control module for doors. Figure 4 A magnified schematic diagram of the structure at point B;

[0026] Figure 7 This is a schematic diagram of the mounting structure of the door electronic temperature control module for easy maintenance according to the present invention;

[0027] Figure 8 This invention provides a convenient maintenance electronic temperature control module for doors. Figure 7 Schematic diagram of the internal cross-sectional structure;

[0028] Figure 9 This is a schematic diagram of the connection structure of the first positioning component of the door electronic temperature control module for easy maintenance according to the present invention.

[0029] In the diagram: 1. Cabinet body; 2. Door; 3. Electronic temperature control component; 4. Turntable; 5. Decorative cover; 6. Fixing box; 7. Control line; 8. Positioning plate; 9. Lead wire plate; 10. Locking block; 11. First positioning component; 12. Push plate; 13. First guide post; 14. Fixing frame; 15. First spring; 16. Plug-in plate; 17. Telescopic rod; 18. Second spring; 19. First rotating sleeve; 20. Slot; 21. First connecting shaft; 22. Fixing block; 23. Second rotating sleeve; 24. Pawl; 25. Second connecting shaft; 26. Second positioning component; 27. Ratchet; 28. Second guide post; 29. ​​Connecting plate; 30. Clamping plate; 31. Slide groove; 32. Rack; 33. Gear; 34. Rotating shaft; 35. Rotating plate; 36. Connecting block; 37. Third spring. Detailed Implementation

[0030] 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.

[0031] Example 1

[0032] Reference Figure 1-6 As shown: A door electronic temperature control module for easy maintenance includes a cabinet 1, a door 2 installed on one side of the cabinet 1, an electronic temperature control component 3 installed on the top of one side of the door 2, a first rotating sleeve 19 fixedly connected to one side of the electronic temperature control component 3, slots 20 on both sides of one end of the first rotating sleeve 19, a fixing block 22 slidably connected inside the slot 20, a second rotating sleeve 23 fixedly connected to one end of the fixing block 22, a ratchet 27 fixedly connected to one end of the second rotating sleeve 23, a first connecting shaft 21 fixedly connected to the middle of the ratchet 27, a decorative cover 5 rotatably connected to the outside of the first connecting shaft 21, and a turntable 4 fixedly connected to one end of the first connecting shaft 21 through the decorative cover 5. A pawl 24 is movably connected to the outside of the door 7. One end of the pawl 24 is fixedly connected to a second connecting shaft 25. A decorative cover 5 is rotatably connected to the outside of the second connecting shaft 25. One end of the second connecting shaft 25 passes through the decorative cover 5 and is fixedly connected to a second positioning component 26. The second positioning component 26 is movably connected to the decorative cover 5. Telescopic rods 17 are fixedly connected to both sides of the decorative cover 5. A push plate 12 is fixedly connected to one end of the telescopic rod 17. A locking block 10 overlaps one side of the push plate 12 and is fixedly connected to the bottom inside of the door 2. A second spring 18 is fixedly connected to both sides of the decorative cover 5. One end of the second spring 18 is fixedly connected to one side of the push plate 12 and is sleeved on the outside of the telescopic rod 17.

[0033] Cabinet 1 and door 2 are connected by hinges, facilitating the rotation of door 2. By pulling outwards, the connecting block 36 on the first positioning component 11 extends the third spring 37, separating the connecting block 36 from the inserted decorative cover 5. Rotating the first positioning component 11 sequentially drives the second connecting shaft 25 and the pawl 24 to move. The pawl 24 separates from the movable ratchet 27. Rotating the turntable 4 sequentially drives the first connecting shaft 21, the ratchet 27, and the second rotating sleeve 23 to move. Due to the L-shaped design of the slot 20, the fixing block 22 rotates to contact one end of the slot 20, pushing the decorative cover 5 into the door 2. The push plate 12 contacts the locking block 10, pushing the push plate 12 towards the decorative cover 5. The second spring 18 is compressed, and the telescopic rod 17 retracts, causing the push plate 12 to move into the door 2 until it separates from the decorative cover 5. The second spring 18 then pushes the decorative cover 5 to overlap with the inner side of the door 2. Subsequently, the turntable 4 is reversed. The first connecting shaft 21, ratchet 27, second rotating sleeve 23, and fixing block 22 are moved, causing the fixing block 22 to move to the other end of the slot 20. Then, the second positioning component 26 is reversed, causing the pawl 24 to rotate and fit against the side of the ratchet 27. The third spring 37 pushes the connecting block 36 to insert into the decorative cover 5, so that the ratchet 27 and the pawl 24 are engaged, thereby fixing the first rotating sleeve 19 and the second rotating sleeve 23. This facilitates the fixed installation of the decorative cover 5 and allows for quick disassembly and installation of the decorative cover 5 when replacing the control line 7. By installing the electronic temperature control component 3 outside the door seal, it blends into the environment, eliminating the need for insulation structures, the risk of condensation, and the need to disassemble the door body 2, thus improving ease of use. The electronic temperature control component 3 is a customized electronic control module with a large digital temperature display and an integrated appearance. The film is mainstream, simple, and elegant.

[0034] Example 2

[0035] Figure 1-4 As shown, a fixed frame 14 is fixedly connected to one side of the electronic temperature control component 3, a first spring 15 is fixedly connected to one side of the fixed frame 14, a plug plate 16 is fixedly connected to one end of the first spring 15, a positioning plate 8 is movably connected to one side of the plug plate 16, and the positioning plate 8 is fixedly connected to the bottom inner side of the door body 2; a first guide post 13 is slidably connected to one side of the plug plate 16, and the two ends of the first guide post 13 are respectively fixedly connected to the two sides of the fixed frame 14, and the first spring 15 is sleeved on the outside of the first guide post 13.

[0036] Rotate the door 2 to open it, and place the electronic temperature control component 3 inside the door 2. The plug plate 16 contacts the positioning plate 8, and the positioning plate 8 pushes the plug plate 16 to the outside of the electronic temperature control component 3. The plug plate 16 is slidably connected to the first guide post 13, and the plug plate 16 moves on the first guide post 13 to facilitate fixing the movement path of the plug plate 16. The movement of the plug plate 16 pushes the first spring 15 to compress. When the plug plate 16 moves with the electronic temperature control component 3 to contact the through hole opened on the positioning plate 8, the first spring 15 pushes the plug plate 16 to move, and the plug plate 16 is inserted into the positioning plate 8, thereby snapping the electronic temperature control component 3 into the door 2. The glass screen on the electronic temperature control component 3 is flush with one side of the door 2, which facilitates the snapping between the electronic temperature control component 3 and the door 2.

[0037] Example 3

[0038] according to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 and Figure 9 As shown, a lead plate 9 is fixedly connected to the inner side of the door body 2, and a control line 7 is snapped onto the outer side of the lead plate 9; clamping plates 30 are provided on both sides of the outer side of the control line 7, a connecting plate 29 is fixedly connected to one side of the clamping plate 30, and a fixing box 6 is provided on one side of the connecting plate 29. The fixing box 6 is fixedly connected to the bottom inner side of the door body 2, and second guide posts 28 are fixedly connected to both sides of the top of the fixing box 6. The second guide posts 28 are slidably connected to the clamping plate 30. A rack 32 is fixedly connected to one side of the connecting plate 29 through the fixing box 6, and a slide groove 31 is slidably connected to one side of the rack 32. The slide groove 31 is opened on one side of the fixing box 6; the rack 32 On the other side, a gear 33 is engaged, and a rotating shaft 34 is fixedly connected to the middle of the gear 33. One end of the rotating shaft 34 is rotatably connected to one side of the fixed box 6, and the other end of the rotating shaft 34 passes through the fixed box 6 and is fixedly connected to a first positioning component 11. The first positioning component 11 is movably connected to one side of the fixed box 6. The second positioning component 26 and the first positioning component 11 both include a rotating plate 35, a connecting block 36 and a third spring 37. One side of the rotating plate 35 is slidably connected to the outside of the connecting block 36, one end of the third spring 37 is fixedly connected to one side of the rotating plate 35, and the other end of the third spring 37 is fixedly connected to the connecting block 36.

[0039] By pulling the connecting block 36 on the second positioning assembly 26 outward, the third spring 37 extends, and the connecting block 36 separates from the inserted fixed box 6. Rotating the second positioning assembly 26 sequentially drives the rotating shaft 34 and the gear 33 to separate. Through the meshing between the gear 33 and the rack 32, the rack 32 is driven to move. The rack 32 moves on the sliding groove 31, which can fix the movement path of the rack 32. The movement of the rack 32 sequentially drives the connecting plate 29 and the clamping plate 30 to move. The clamping plate 30 is in the sliding groove 31. The movement of the two guide columns 28 facilitates more stable movement of the clamping plate 30. The two clamping plates 30 cooperate to clamp and remove the control line 7, thereby positioning the control line 7. The control line 7 does not need to pass through the hinge hollow shaft, and there is no wear between the two when opening and closing the door. The control line 7 is not easily damaged, which improves its service life. The electronic temperature control component 3 is clipped onto the door body 2, and then the control line 7 is inserted and led to the top of the hinge hole without passing through the hinge hollow shaft. After installing the rear decorative cover 5, it can be assembled with the main unit.

[0040] The usage and working principle of this device are as follows: First, rotate the door 2 to open it, and place the electronic temperature control component 3 inside the door 2. The plug plate 16 contacts the positioning plate 8, and the positioning plate 8 pushes the plug plate 16 to the outside of the electronic temperature control component 3. The plug plate 16 is slidably connected to the first guide post 13, and the plug plate 16 moves on the first guide post 13 to facilitate fixing the movement path of the plug plate 16. The movement of the plug plate 16 pushes the first spring 15 to compress. When the plug plate 16 moves with the electronic temperature control component 3 to contact the through hole opened on the positioning plate 8, the first spring 15 pushes the plug plate 16 to move, and the plug plate 16 is inserted into the positioning plate 8, thereby locking the electronic temperature control component 3 inside the door 2. The glass screen on the electronic temperature control component 3 is flush with one side of the door 2. One end of the control line 7 is plugged into the electronic temperature control component 3.

[0041] By pulling the connecting block 36 on the first positioning assembly 11 outward, the third spring 37 extends, separating the connecting block 36 from the inserted decorative cover 5. Rotating the first positioning assembly 11 sequentially drives the second connecting shaft 25 and the pawl 24 to move. The pawl 24 separates from the movable ratchet 27. Rotating the turntable 4 sequentially drives the first connecting shaft 21, the ratchet 27, and the second rotating sleeve 23 to move. Due to the L-shaped design of the slot 20, the fixing block 22 rotates to contact one end of the slot 20, pushing the decorative cover 5 into the door body 2. The push plate 12 contacts the locking block 10, pushing the push plate 12 towards the decorative cover 5. The second spring 18 is compressed, and the telescopic rod 17 retracts, making... After the push plate 12 moves into the door body 2 and separates from the decorative cover 5, the second spring 18 pushes the decorative cover 5 to overlap with the inner side of the door body 2. Then, the turntable 4 is reversed, which drives the first connecting shaft 21, ratchet 27, second rotating sleeve 23 and fixing block 22 to move in sequence, so that the fixing block 22 moves to the other end of the slot 20. Then, the second positioning component 26 is reversed, which drives the pawl 24 to rotate to fit against the side of the ratchet 27. The third spring 37 pushes the connecting block 36 to insert with the decorative cover 5, so that the ratchet 27 and the pawl 24 are engaged, thereby fixing the first rotating sleeve 19 and the second rotating sleeve 23, which facilitates the fixed installation of the decorative cover 5.

[0042] By pulling the connecting block 36 on the second positioning component 26 outward, the third spring 37 extends, and the connecting block 36 separates from the inserted fixed box 6. Rotating the second positioning component 26 sequentially drives the rotating shaft 34 and the gear 33 to separate. Through the meshing between the gear 33 and the rack 32, the rack 32 is driven to move. The rack 32 moves on the sliding groove 31, which can fix the movement path of the rack 32. The movement of the rack 32 sequentially drives the connecting plate 29 and the clamping plate 30 to move. The clamping plate 30 moves on the sliding guide post 28, which makes the movement of the clamping plate 30 more stable. The two clamping plates 30 cooperate to clamp and remove the control line 7.

[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A door electronic temperature control module that is easy to maintain, comprising a cabinet (1), characterized in that: A door (2) is installed on one side of the cabinet (1). An electronic temperature control component (3) is installed on the top of one side of the door (2). A first rotating sleeve (19) is fixedly connected to one side of the electronic temperature control component (3). A slot (20) is opened on both sides of one end of the first rotating sleeve (19). A fixing block (22) is slidably connected inside the slot (20). A second rotating sleeve (23) is fixedly connected to one end of the fixing block (22). A ratchet (27) is fixedly connected to one end of the second rotating sleeve (23). A first connecting shaft is fixedly connected to the middle of the ratchet (27). (21) A decorative cover (5) is rotatably connected to the outside of the first connecting shaft (21). A turntable (4) is fixedly connected to one end of the first connecting shaft (21) through the decorative cover (5). A pawl (24) is movably connected to the outside of the ratchet (27). A second connecting shaft (25) is fixedly connected to one end of the pawl (24). A decorative cover (5) is rotatably connected to the outside of the second connecting shaft (25). A second positioning component (26) is fixedly connected to one end of the second connecting shaft (25) through the decorative cover (5). The second positioning component (26) is movably connected to the decorative cover (5). Both sides of the decorative cover (5) are fixedly connected to telescopic rods (17), and one end of the telescopic rods (17) is fixedly connected to a push plate (12). A locking block (10) is attached to one side of the push plate (12), and the locking block (10) is fixedly connected to the bottom inner side of the door body (2); The decorative cover (5) is fixedly connected to two sides with a second spring (18), one end of the second spring (18) is fixedly connected to one side of the push plate (12), and the second spring (18) is sleeved on the outside of the telescopic rod (17); The decorative cover (5) is fixedly connected to two sides with a second spring (18), one end of the second spring (18) is fixedly connected to one side of the push plate (12), and the second spring (18) is sleeved on the outside of the telescopic rod (17); A fixed frame (14) is fixedly connected to one side of the electronic temperature control component (3), a first spring (15) is fixedly connected to one side of the fixed frame (14), a plug plate (16) is fixedly connected to one end of the first spring (15), a positioning plate (8) is movably connected to one side of the plug plate (16), and the positioning plate (8) is fixedly connected to the bottom inner side of the door body (2). The inner side of the door (2) is fixedly connected to a lead plate (9), and the outer side of the lead plate (9) is snapped with a control line (7). The second positioning component (26) and the first positioning component (11) both include a rotating plate (35), a connecting block (36) and a third spring (37). One side of the rotating plate (35) is slidably connected to the outside of the connecting block (36), one end of the third spring (37) is fixedly connected to one side of the rotating plate (35), and the other end of the third spring (37) is fixedly connected to the connecting block (36). Clamping plates (30) are provided on both sides of the control line (7). A connecting plate (29) is fixedly connected to one side of the clamping plate (30). A fixing box (6) is provided on one side of the connecting plate (29). A rack (32) is fixedly connected to one side of the connecting plate (29) through the fixing box (6). A gear (33) meshes with the other side of the rack (32).

2. The door electronic temperature control module for easy maintenance according to claim 1, characterized in that: The fixed box (6) is fixedly connected to the bottom of the inner side of the door (2). The top two sides of the fixed box (6) are fixedly connected to the second guide post (28). The second guide post (28) is slidably connected to the clamping plate (30). The rack (32) is slidably connected to one side of the slide groove (31). The slide groove (31) is opened on one side of the fixed box (6).

3. The door electronic temperature control module for easy maintenance according to claim 2, characterized in that: A rotating shaft (34) is fixedly connected to the middle of the gear (33). One end of the rotating shaft (34) is rotatably connected to one side of the fixed box (6). The other end of the rotating shaft (34) passes through the fixed box (6) and is fixedly connected to a first positioning component (11). The first positioning component (11) is movably connected to one side of the fixed box (6).

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