Self-adhesive label display device

Abstract

The utility model discloses a self-adhesive label display device which comprises a label plate, a groove is formed in the lower end of the label plate, an installation hole and a limiting groove which are concave inwards are formed in the outer wall of the rear end of the label plate, the limiting groove is located between the groove and the installation hole, the installation hole is communicated with the groove through the limiting groove, and the limiting groove is communicated with the groove. A detachable mounting mechanism is connected into the groove, a retracting and releasing mechanism is arranged on the outer wall of the mounting mechanism in a sleeving mode, a limiting mechanism is fixedly mounted in the mounting hole and extends out of the limiting groove to be connected with the retracting and releasing mechanism in a limiting mode, and a label part is arranged at the upper end of the label plate. The label is pasted on the label part and the paper board, the label is arranged to be a multilayer foldable label, more product information can be conveniently displayed in a folding mode, the label pasted on the paper board can be conveniently unfolded and more information can be conveniently watched in cooperation with the installation mechanism and the folding and unfolding mechanism, and the problems that the function is single, use is not convenient, and use is not convenient are solved. And certain inconvenience exists.

Description

Technical Field

[0001] This utility model belongs to the field of self-adhesive label technology, and in particular relates to a self-adhesive label display device. Background Technology

[0002] Self-adhesive labels, also known as pressure-sensitive labels, are composite materials made of paper, film, or special materials as the face stock, coated with adhesive on the back, and protected with silicone-coated backing paper. After printing and die-cutting, they become finished labels. The primary purpose of self-adhesive labels is to convey information to the observer through printed patterns or text, especially labels affixed to products, which often need to display product characteristics, ingredients, origin, manufacturer, and other information. Compared to traditional labels, self-adhesive labels offer advantages such as no need for glue, paste, or water, no pollution, and time-saving application. They have a wide range of applications, are convenient and quick, and are widely used in the market, effectively improving users' understanding of product information.

[0003] However, existing technologies have some problems: the area where information can be filled in on existing self-adhesive labels is often small, which makes it impossible to fully display product information, and the functions are limited, making them inconvenient to use. Therefore, we propose a self-adhesive label display device. Utility Model Content

[0004] To address the problems existing in the above-mentioned technologies, this utility model provides a self-adhesive label display device, which solves the problems of insufficient display of product information, limited functionality, inconvenience in use, and other inconveniences.

[0005] This utility model is implemented as follows: a self-adhesive label display device includes a label plate, a groove at the lower end of the label plate, an inwardly recessed mounting hole and a limiting groove on the outer wall of the rear end of the label plate, the limiting groove being located between the groove and the mounting hole, and the mounting hole communicating with the groove through the limiting groove, a detachable mounting mechanism being connected inside the groove, a retractable mechanism being sleeved on the outer wall of the mounting mechanism, a limiting mechanism being fixedly installed inside the mounting hole, the limiting mechanism extending out of the limiting groove and being limitedly connected to the retractable mechanism, and a label part being provided at the upper end of the label plate.

[0006] As a preferred embodiment of this utility model, the label plate has limiting holes that communicate with the groove on both the left and right outer walls.

[0007] In a preferred embodiment of this invention, a positioning block is fixedly connected inside the groove, the positioning block is located at the front end of the limiting groove, and the positioning block is arranged in an L-shape.

[0008] As a preferred embodiment of this utility model, the limiting mechanism includes a connecting shaft fixedly connected inside the mounting hole and a positioning plate disposed outside the label plate. The outer wall of the connecting shaft is provided with a threaded portion, and a threaded cylinder is fixedly connected to the outer wall of the positioning plate near the label plate. The threaded cylinder is threadedly connected to the connecting shaft through the threaded portion.

[0009] In a preferred embodiment of this utility model, a first spring and a collar are sleeved on the outer wall of the connecting shaft. The collar is located at the rear end of the first spring. Both ends of the first spring are in contact with the collar and the inner wall of the mounting hole, respectively. A protrusion is integrally formed on the outer wall of the collar. The protrusion extends through the limiting groove into the interior of the groove. A rectangular groove is provided through the outer wall of the end of the protrusion located inside the groove.

[0010] As a preferred embodiment of the present invention, the mounting mechanism includes a first mounting block and a second mounting block disposed inside the groove. The outer walls of the first mounting block and the second mounting block are respectively fixedly connected to a mounting shaft and a mounting cylinder on their corresponding outer walls. The mounting cylinder has an inner cavity inside. A retaining shaft is fixedly connected to one end of the mounting shaft near the mounting cylinder, and the retaining shaft extends into the inner cavity.

[0011] As a preferred embodiment of this utility model, the outer wall of the mounting cylinder is symmetrically provided with storage holes, which communicate with the inner cavity; the outer wall of the retaining shaft is symmetrically provided with storage grooves, and a positioning piece is connected inside the storage groove; the positioning piece extends out of the storage groove and has a protrusion integrally formed on its outer wall.

[0012] As a preferred embodiment of this utility model, the outer wall of the opposite side of the first mounting block and the second mounting block are provided with an inwardly recessed stepped hole. A telescopic block is connected inside the stepped hole. A buffer spring is connected to one end of the telescopic block inside the stepped hole. The other end of the buffer spring is connected to the inner wall of the stepped hole. The other end of the telescopic block extends out of the stepped hole and is connected to the limiting hole.

[0013] As a preferred embodiment of this utility model, the retracting mechanism includes a sleeve fitted onto the outer wall of the mounting shaft and the mounting cylinder. The outer wall of the sleeve is wrapped with printed cardboard. One end of the printed cardboard is fixedly connected to a protective pad. A hanging ring is provided through the outer wall of the protective pad. The protective pad is fitted onto the outer wall of the positioning block through the hanging ring. The lower end of the protective pad is connected to a buckle that engages with the protrusion.

[0014] In a preferred embodiment of this utility model, the buckle includes a fixed block that is fixedly connected to the lower end of the protective pad. A movable block is movably connected to one side of the fixed block. An opening is reserved between the movable blocks. The outer wall of the movable block near the fixed block is provided with an inwardly recessed hinge groove. Positioning holes are provided on both the front and rear outer walls of the movable block. The positioning holes communicate with the hinge groove. A hinge block extending into the hinge groove is fixedly connected to the side of the fixed block near the movable block. A buffer shaft is fixedly connected to the outer walls of both the front and rear ends of the hinge block. The buffer shaft extends into the positioning hole. A torsion spring is sleeved on the outer wall of the buffer shaft. The middle section of the torsion spring is fixedly connected to the outer wall of the movable block.

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

[0016] 1. This utility model, by setting the label part on the label plate, makes it easy to attach the label to the label part, making it easy to view. Moreover, by using the unfolding and retracting mechanism, more information can be printed on the unfolded retracting mechanism, making the information displayed on the label more extensive and improving the practicality of the label.

[0017] 2. The positioning plate of this utility model is connected to the connecting shaft by a threaded cylinder, which makes it easy to disassemble and install the positioning plate from the connecting shaft. This facilitates the connection of the first spring and the collar to the connecting shaft. When the winding and unwinding mechanism moves, it can easily drive the collar connected to the winding and unwinding mechanism. The collar moves on the outer wall of the connecting shaft and compresses the first spring. When the winding and unwinding mechanism needs to be wound up, it is only necessary to move the winding and unwinding mechanism away from the positioning block. With the help of the rebound force of the first spring, winding can be achieved. The operation is simple and applicable.

[0018] 3. In this utility model, the locking shaft extends into the inner cavity, and the positioning piece set on the locking shaft contacts the inner wall of the mounting cylinder, causing the positioning piece to move into the storage groove. When the positioning piece is located at the position of the storage hole, the positioning piece resets and extends into the storage hole, which facilitates the connection between the mounting shaft and the mounting cylinder, and facilitates the disassembly and installation between the first mounting block and the second mounting block. The first mounting block and the second mounting block move into the stepped hole through the telescopic block, compressing the buffer spring, which facilitates the connection between the first mounting block and the second mounting block in the groove. When the stepped hole corresponds to the limiting hole, the buffer spring rebounds, driving the telescopic block to extend into the limiting hole, which facilitates the limiting and fixing of the first mounting block and the second mounting block, and facilitates the disassembly and installation of the mounting mechanism from inside the label plate.

[0019] 4. This utility model facilitates contact between the movable block and the protrusion through the pre-reserved opening between the movable blocks. During the contact between the protrusion and the movable block, the movable block is driven to rotate on the fixed block, which facilitates the protrusion to extend into the interior between the movable block and the fixed block. The movable plate is hinged to the fixed block by a torsion spring. When the protrusion extends into the interior, the torsion spring drives the movable plate to return to its original position without any force, which facilitates the extension of the movable block into the rectangular groove and limits the protrusion. It also facilitates the movement of the collar on the connecting shaft when the retraction mechanism moves. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram provided by an embodiment of the present utility model;

[0021] Figure 2 This is a bottom view diagram provided by an embodiment of the present utility model;

[0022] Figure 3 This is a three-dimensional schematic diagram of the positioning block provided in an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the rear cross-section of the label plate provided in this embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram of the limiting mechanism provided in an embodiment of the present utility model;

[0025] Figure 6 This is a cross-sectional schematic diagram of the installation mechanism provided in this embodiment of the utility model;

[0026] Figure 7 This is a side view schematic diagram of the take-up and take-down mechanism provided in an embodiment of this utility model;

[0027] Figure 8 This is a schematic diagram of the connection between the movable block and the fixed block provided in an embodiment of this utility model.

[0028] In the diagram: 1. Label plate; 11. Label part; 12. Groove; 13. Positioning block; 14. Limiting groove; 15. Mounting hole; 16. Limiting hole; 3. Mounting mechanism; 31. First mounting block; 32. Mounting shaft; 33. Mounting cylinder; 34. Locking shaft; 35. Second mounting block; 311. Telescopic block; 312. Stepped hole; 313. Buffer spring; 331. Storage hole; 332. Inner cavity; 341. Positioning piece; 342. Storage groove; 4. Limiting mechanism; 41. Connecting... 42. Connecting shaft; 43. Collar; 44. Positioning plate; 45. Protrusion; 46. First spring; 411. Threaded part; 431. Threaded cylinder; 441. Rectangular groove; 5. Retracting mechanism; 51. Sleeve; 52. Printing cardboard; 53. Protective pad; 54. Buckle; 531. Hanging ring; 541. Opening; 542. Movable block; 543. Fixed block; 544. Hinge block; 545. Torsion spring; 5421. Hinge groove; 5422. Positioning hole; 5441. Buffer shaft. Detailed Implementation

[0029] To further understand the utility model content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0030] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0031] Example 1:

[0032] like Figures 1 to 2 As shown in the figure, an embodiment of the present invention provides a self-adhesive label display device, including a label plate 1. The lower end of the label plate 1 is provided with a groove 12. The outer wall of the rear end of the label plate 1 is provided with an inwardly recessed mounting hole 15 and a limiting groove 14. The limiting groove 14 is located between the groove 12 and the mounting hole 15, and the mounting hole 15 communicates with the groove 12 through the limiting groove 14. A detachable mounting mechanism 3 is connected inside the groove 12. A retractable mechanism 5 is sleeved on the outer wall of the mounting mechanism 3. A limiting mechanism 4 is fixedly installed inside the mounting hole 15. The limiting mechanism 4 extends out of the limiting groove 14 and is limitedly connected to the retractable mechanism 5. A label is provided at the upper end of the label plate 1. By setting the label part 11 on the label plate 1, it is easy to attach the self-adhesive label to the label part 11 for easy viewing. Furthermore, by unfolding the retractable mechanism 5, more information can be printed on the unfolded retractable mechanism 5, making the information displayed on the label more extensive and improving the practicality of the label.

[0033] like Figures 2 to 3As shown, the label plate 1 has limiting holes 16 on both the left and right outer walls that communicate with the groove 12; a positioning block 13 is fixedly connected inside the groove 12, the positioning block 13 is located at the front end of the limiting groove 14, and the positioning block 13 is arranged in an L-shape; the limiting holes 16 facilitate the connection of the installation mechanism 3, and the positioning block 13 connected inside the groove 12 facilitates the limiting and fixing of the retracting mechanism 5 after it is unfolded.

[0034] like Figures 4 to 5 As shown, the limiting mechanism 4 includes a connecting shaft 41 fixedly connected inside the mounting hole 15, and a positioning plate 43 disposed outside the label plate 1. The outer wall of the connecting shaft 41 is provided with a threaded portion 411. A threaded cylinder 431 is fixedly connected to the outer wall of the positioning plate 43 near the label plate 1. The threaded cylinder 431 is threadedly connected to the connecting shaft 41 through the threaded portion 411. A first spring 45 and a collar 42 are sleeved on the outer wall of the connecting shaft 41. The collar 42 is located at the rear end of the first spring 45. Both ends of the first spring 45 are in contact with the collar 42 and the inner wall of the mounting hole 15, respectively. A protrusion 44 is integrally formed on the outer wall of the collar 42, and the protrusion 44 penetrates the limiting mechanism. The groove 14 extends into the groove 12. The outer wall of the end of the protrusion 44 located inside the groove 12 is provided with a rectangular groove 441. The positioning plate 43 is threadedly connected to the connecting shaft 41 through the threaded cylinder 431, which facilitates the removal and installation of the positioning plate 43 from the connecting shaft 41. This makes it easy to connect the first spring 45 and the collar 42 to the connecting shaft 41. When the winding and unwinding mechanism 5 moves, it is easy to drive the collar 42 connected to the winding and unwinding mechanism 5. The collar 42 moves on the outer wall of the connecting shaft 41 and compresses the first spring 45. When the winding and unwinding mechanism 5 needs to be wound up, it is only necessary to move the winding and unwinding mechanism 5 away from the positioning block 13. With the help of the rebound force of the first spring 45, the winding can be achieved. The operation is simple and applicable.

[0035] like Figure 6As shown, the mounting mechanism 3 includes a first mounting block 31 and a second mounting block 35 disposed inside the groove 12. A mounting shaft 32 and a mounting cylinder 33 are respectively fixedly connected to the outer walls of the first mounting block 31 and the second mounting block 35 on opposite sides. The mounting cylinder 33 has an inner cavity 332. A retaining shaft 34 is fixedly connected to one end of the mounting shaft 32 near the mounting cylinder 33, and the retaining shaft 34 extends into the inner cavity 332. The outer wall of the mounting cylinder 33 is symmetrically provided with receiving holes 331, which connect to the inner cavity. 332 interconnected, the outer wall of the retaining shaft 34 is symmetrically provided with a storage groove 342, the storage groove 342 is connected to a positioning piece 341, the positioning piece 341 extends out of the storage groove 342 and the outer wall is integrally formed with a protrusion; the outer wall of the first mounting block 31 and the second mounting block 35 on the opposite side is provided with an inwardly recessed stepped hole 312, the stepped hole 312 is connected to a telescopic block 311, and the end of the telescopic block 311 located inside the stepped hole 312 is connected to a buffer spring 313. 3. The other end is connected to the inner wall of the stepped hole 312, and the other end of the telescopic block 311 extends out of the stepped hole 312 and connects to the limiting hole 16; the locking shaft 34 extends into the inner cavity 332, and the positioning piece 341 set on the locking shaft 34 contacts the inner wall of the mounting cylinder 33, so that the positioning piece 341 moves into the receiving groove 342. When the positioning piece 341 is in the position of the receiving hole 331, the positioning piece 341 resets and extends into the receiving hole 331, which facilitates the connection between the mounting shaft 32 and the mounting cylinder 33, and facilitates the connection between the first mounting block 31 and the second mounting block 32. The two mounting blocks 35 can be disassembled and installed together. The first mounting block 31 and the second mounting block 35 can move into the stepped hole 312 through the telescopic block 311, which compresses the buffer spring 313. This makes it easier for the first mounting block 31 and the second mounting block 35 to be connected inside the groove 12. When the stepped hole 312 corresponds to the limiting hole 16, the buffer spring 313 rebounds, which drives the telescopic block 311 to extend into the limiting hole 16. This makes it easier to limit and fix the first mounting block 31 and the second mounting block 35, and makes it easier for the installation mechanism 3 to be disassembled and installed from inside the label plate 1.

[0036] like Figures 7 to 8As shown, the retractable mechanism 5 includes a sleeve 51 fitted onto the outer wall of the mounting shaft 32 and the mounting cylinder 33. A printed cardboard 52 is wound around the outer wall of the sleeve 51. A protective pad 53 is fixedly connected to one end of the printed cardboard 52. A hanging ring 531 is fixedly connected to the outer wall of the protective pad 53. The protective pad 53 is fitted onto the outer wall of the positioning block 13 via the hanging ring 531. A buckle 54, which engages with the protrusion 44, is connected to the lower end of the protective pad 53. The buckle 54 includes components correspondingly fixedly connected to the protective pad. The fixed block 543 at the lower end of the fixed block 543 has a movable block 542 movably connected to one side of it. An opening 541 is reserved between the movable blocks 542. The outer wall of the movable block 542 near the fixed block 543 has an inwardly recessed hinge groove 5421. The outer walls of the front and rear sides of the movable block 542 are provided with positioning holes 5422, which communicate with the hinge groove 5421. The fixed block 543 near the movable block 542 has a fixed part that extends into the hinge groove. The hinge block 544 inside 5421 has a buffer shaft 5441 fixedly connected to the outer walls of its front and rear ends. The buffer shaft 5441 extends into the positioning hole 5422. A torsion spring 545 is sleeved on the outer wall of the buffer shaft 5441, and the middle section of the torsion spring 545 is fixedly connected to the outer wall of the movable block 542. The opening 541 reserved between the movable blocks 542 facilitates the contact between the movable block 542 and the protrusion 44. During the contact between the protrusion 44 and the movable block 542... The movable block 542 rotates on the fixed block 543, which facilitates the protrusion 44 to extend into the interior between the movable block 542 and the fixed block 543. The movable plate is hinged to the fixed block 543 by a torsion spring 545. When the protrusion 44 extends into the interior, the torsion spring 545 drives the movable block 542 to return to its original position without any force, which facilitates the movable block 542 to extend into the rectangular groove 441 and limits the protrusion 44. This facilitates the movement of the collar 42 on the connecting shaft 41 when the retracting mechanism 5 moves.

[0037] Working principle of Example 1:

[0038] In use, the positioning block 13 is threadedly connected to the connecting shaft 41 via the threaded cylinder 431, which facilitates the removal and installation of the positioning block 13 from the connecting shaft 41. This allows for easy connection of the first spring 45 and the collar 42 to the connecting shaft 41. Pulling the protective pad 53 causes the collar 42 to move on the connecting shaft 41 via the buckle 54. During the movement of the collar 42, the first spring 45 is compressed. Through the external polygonal shaft, the collar extends into the polygonal groove on the outer wall of the telescopic block 311, facilitating the rotation of the installation mechanism 3. When the installation mechanism 3 rotates, it causes the cardboard 52 to be wound up. The rebound of the first spring 45 facilitates the winding of the cardboard 52, thereby enabling the printed cardboard 52 to unfold. The hanging ring 531 on the protective pad 53 is used to fit the protective pad 53 onto the positioning block 13 for limiting and fixing. This facilitates the limiting and fixing of the unfolded printed cardboard 52, making it easier to view the label. Combined with the label attached to the label section 11, it makes it easier to view more label information.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-adhesive label display device, comprising a label plate (1), characterized in that: The label plate (1) has a groove (12) at its lower end. The outer wall of the rear end of the label plate (1) has an inwardly recessed mounting hole (15) and a limiting groove (14). The limiting groove (14) is located between the groove (12) and the mounting hole (15). The mounting hole (15) communicates with the groove (12) through the limiting groove (14). A detachable mounting mechanism (3) is connected inside the groove (12). A retractable mechanism (5) is sleeved on the outer wall of the mounting mechanism (3). A limiting mechanism (4) is fixedly installed inside the mounting hole (15). The limiting mechanism (4) extends out of the limiting groove (14) and is limitedly connected to the retractable mechanism (5). The label plate (1) has a label part (11) at its upper end.

2. The self-adhesive label display device as described in claim 1, characterized in that: The label plate (1) has limiting holes (16) on both the left and right outer walls that communicate with the groove (12).

3. The self-adhesive label display device as described in claim 2, characterized in that: A positioning block (13) is fixedly connected inside the groove (12). The positioning block (13) is located at the front end of the limiting groove (14) and is arranged in an L-shape.

4. The self-adhesive label display device as described in claim 1, characterized in that: The limiting mechanism (4) includes a connecting shaft (41) fixedly connected inside the mounting hole (15) and a positioning plate (43) disposed outside the label plate (1). The outer wall of the connecting shaft (41) is provided with a threaded part (411). A threaded cylinder (431) is fixedly connected to the outer wall of the positioning plate (43) near the label plate (1). The threaded cylinder (431) is threadedly connected to the connecting shaft (41) through the threaded part (411).

5. The self-adhesive label display device as described in claim 4, characterized in that: The outer wall of the connecting shaft (41) is fitted with a first spring (45) and a collar (42). The collar (42) is located at the rear end of the first spring (45). The two ends of the first spring (45) are in contact with the inner wall of the collar (42) and the mounting hole (15), respectively. The outer wall of the collar (42) is integrally formed with a protrusion (44). The protrusion (44) extends through the limiting groove (14) and into the groove (12). The outer wall of the end of the protrusion (44) located inside the groove (12) is provided with a rectangular groove (441).

6. The self-adhesive label display device as described in claim 1, characterized in that: The mounting mechanism (3) includes a first mounting block (31) and a second mounting block (35) disposed inside the groove (12). The first mounting block (31) and the second mounting block (35) are respectively fixedly connected to the outer wall of the corresponding side of the outer wall of the second mounting block (35) with a mounting shaft (32) and a mounting cylinder (33). The mounting cylinder (33) is provided with an inner cavity (332). The end of the mounting shaft (32) near the mounting cylinder (33) is fixedly connected to a retaining shaft (34), which extends into the inner cavity (332).

7. The self-adhesive label display device as described in claim 6, characterized in that: The outer wall of the mounting cylinder (33) is symmetrically provided with storage holes (331), which are interconnected with the inner cavity (332). The outer wall of the retaining shaft (34) is symmetrically provided with storage grooves (342), and a positioning piece (341) is connected inside the storage groove (342). The positioning piece (341) extends out of the inner wall of the storage groove (342) and is integrally formed with a protrusion.

8. The self-adhesive label display device as described in claim 7, characterized in that: The outer wall of the first mounting block (31) and the second mounting block (35) on the opposite side is provided with an inwardly recessed stepped hole (312). A telescopic block (311) is connected inside the stepped hole (312). A buffer spring (313) is connected to one end of the telescopic block (311) inside the stepped hole (312). The other end of the buffer spring (313) is connected to the inner wall of the stepped hole (312). The other end of the telescopic block (311) extends out of the stepped hole (312) and is connected to the limiting hole (16).

9. The self-adhesive label display device as described in claim 1, characterized in that: The retraction mechanism (5) includes a sleeve (51) sleeved on the outer wall of the mounting shaft (32) and the mounting cylinder (33). The outer wall of the sleeve (51) is wrapped with a printed paperboard (52). One end of the printed paperboard (52) is fixedly connected to a protective pad (53). The outer wall of the protective pad (53) is fixedly connected to a hanging ring (531). The protective pad (53) is sleeved on the outer wall of the positioning block (13) through the hanging ring (531). The lower end of the protective pad (53) is connected to a buckle (54) that engages with the protrusion (44).

10. The self-adhesive label display device as described in claim 9, characterized in that: The buckle (54) includes a fixing block (543) fixedly connected to the lower end of the protective pad (53). A movable block (542) is movably connected to one side of the fixing block (543). An opening (541) is reserved between the movable blocks (542). The outer wall of the movable block (542) near the fixing block (543) is provided with an inwardly recessed hinge groove (5421). The outer walls of the front and rear sides of the movable block (542) are provided with positioning holes (5422). The positioning holes (5422) and the hinge grooves are connected. (5421) Interconnected, the fixed block (543) is fixedly connected to the side of the movable block (542) with a hinge block (544) extending into the hinge groove (5421), the outer walls of the front and rear ends of the hinge block (544) are fixedly connected with a buffer shaft (5441), the buffer shaft (5441) extends into the positioning hole (5422), the outer wall of the buffer shaft (5441) is fitted with a torsion spring (545), and the middle section of the torsion spring (545) is fixedly connected to the outer wall of the movable block (542).

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