End cover combination applied to rectangular frame body and exhibition stand

Abstract

The end cover combination comprises a left end cover and a right end cover, the edges of the inner side faces of the left end cover and the right end cover are provided with an outer fixing frame defined by outer fixing plates and an inner supporting frame defined by inner supporting plates, and an inserting groove allowing the end of the frame to be inserted therein is formed between the outer fixing frame and the inner supporting frame; the exhibition rack comprises the end cover combination and further comprises a rectangular frame body, a rotating shaft and a connecting piece, bosses are arranged in the centers of the inner side faces of the left end cover and the right end cover, the rotating shaft is arranged between the bosses in a supported mode, the connecting piece is arranged on the rotating shaft, the rotating shaft is provided with a through hollow cavity, and a reset assembly capable of being automatically wound is arranged in the hollow cavity. The inner supporting plate on the inner supporting frame is attached to the inner wall of the frame body, a good supporting effect on the rectangular frame body is achieved, the structural strength of the frame body is improved, the deformation probability of the frame body is reduced, meanwhile, the end cover combination does not occupy and interfere with the internal space of the frame body, and smooth assembling of the internal structure of the subsequent frame body is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of display racks, and particularly relates to an end cover assembly applied to a rectangular frame, and also relates to a display rack comprising the end cover assembly applied to the rectangular frame. Background Art

[0002] The exhibition stand is a portable promotional display tool. It looks like a rectangular box structure with a hollow interior and a rotating shaft with an automatic reeling function. The display cloth printed with promotional display content is fixed on the rotating shaft. When exhibiting, the display cloth is pulled out and supported by spliced ​​and combined support rods. After the exhibition, the support rods are removed and the display cloth is automatically reeled into the box. It is highly portable.

[0003] The utility model patent with the authorization announcement number CN 220065138 U discloses an advertising display stand that is easy to unfold and store. Its structure is widely used in most existing display stands. Because its rectangular frame is long and has a hollow interior with a rotating shaft structure, its overall strength is not high. The display stand is frequently moved and bumped during use. In order to improve the structural strength and reduce the probability of frame deformation, the following Figure 1 As shown, the patented product has inner panels 2 welded to the interior of a rectangular frame 1 near both ends. End panels 3, which support the rotating shaft and are located at the ends of the frame 1, are then fixed to the inner panels 2 using bolts 5 or rivets. While the inner panels 2 improve the structural strength of the frame, they also increase the complexity of the internal structure, making the subsequent assembly of the rotating shaft and other structures more difficult.

[0004] In addition, when the above-mentioned patented product fixes the spread cloth on the rotating shaft for the first time, it is necessary to first rotate the rotating shaft to the torsion spring force storage state and limit the position of the rotating shaft in this state. The method adopted is to use a limit pin to pass through the limit hole on the end plate, the limit hole on the end piece and the limit hole on the limit piece in sequence, and connect the end plate, the end piece and the limit piece into an integrated structure to complete the limitation of the rotating shaft position; when the spread cloth is stretched out for exhibition, sometimes in order to reduce the force on the support rod, it is also necessary to insert the limit pin into the above-mentioned limit hole to offset the winding force of the torsion spring on the spread cloth. In the above process, the limit pin needs to perform a three-hole alignment operation, which requires high product precision and assembly precision, and increases the product manufacturing cost. Utility Model Content

[0005] The purpose of the present invention is to provide an end cover assembly applied to a rectangular frame, and a display stand including the end cover assembly applied to the rectangular frame, so as to solve the problems raised in the above background technology.

[0006] The utility model provides the following technical solutions: an end cover combination applied to a rectangular frame, wherein the buckle covers are fixed on the left and right ends of the rectangular frame, including a left end cover and a right end cover, the left end cover buckle covers the left end portion of the frame, and the right end cover buckle covers the right end portion of the frame, the edges of the inner side surfaces arranged opposite to each other on the left end cover and the right end cover are provided with an outer fixing frame formed by an outer fixing plate and an inner supporting frame formed by an inner supporting plate, the outer fixing frame surrounds the inner supporting frame, and a slot for inserting the end portion of the rectangular frame is formed therebetween, and a plurality of pairs of coaxially arranged fixing holes are matched on the outer fixing frame and the inner supporting frame, and each pair of fixing holes is matched with a fixing piece.

[0007] Furthermore, the length of the inner support plate is greater than the length of the outer fixing plate.

[0008] The utility model also provides the following technical solution: an exhibition stand, comprising the above-mentioned end cover assembly applied to a rectangular frame, and also comprising a rectangular frame, a rotating shaft and a connecting piece, wherein the left end cover buckle cover in the end cover assembly is fixed to the left end portion of the frame, and the right end cover buckle cover in the end cover assembly is fixed to the right end portion of the frame, bosses are provided at the centers of the oppositely arranged inner side surfaces of the left end cover and the right end cover, the rotating shaft support is provided between the bosses, a connecting piece is provided on the rotating shaft, and the rotating shaft has a through hollow cavity, in which a reset component capable of automatic retraction is provided.

[0009] Furthermore, the reset assembly includes a torsion spring rod, a torsion spring, a left-turn block and a right-turn block. The torsion spring rod is arranged in the hollow cavity of the rotating shaft, and its left end rotating connecting sleeve is provided with a left-turn block. The left-turn block is fixedly arranged in the left end cavity of the rotating shaft, and the right-turn block is fixedly arranged in the right end cavity of the rotating shaft. The torsion spring sleeve is arranged on the torsion spring rod, the left end of the torsion spring is fixed on the left-turn block, and the right end of the torsion spring is fixed on the right end portion of the torsion spring rod. A rectangular end head is provided at the left end of the torsion spring rod, and a supporting shaft is provided at the right end of the right-turn block. A socket matching the rectangular end head is provided on the corresponding boss of the left end cover, and a socket matching the supporting shaft is provided on the corresponding boss of the right end cover.

[0010] Furthermore, the left-turn block and the right-turn block both include a head and a plug-in part, the outer diameter of the head is larger than the outer diameter of the plug-in part, and a plurality of slots are radially opened on the outer wall of the plug-in part. A plurality of clips matching the slots on the plug-in part are radially arranged on the inner wall of the hollow cavity of the rotating shaft, the outer diameter of the head is larger than the inner diameter of the hollow cavity of the rotating shaft, and the outer diameter of the plug-in part is not larger than the inner diameter of the hollow cavity of the rotating shaft.

[0011] Furthermore, the left-turn block is provided with a fixing hole along its axial direction, and the left end of the torsion spring is inserted into the fixing hole.

[0012] Furthermore, the right end of the torsion spring rod is a forked end, and the right end of the torsion spring is wound around the forked end.

[0013] Furthermore, the socket on the boss corresponding to the left end cover that matches the rectangular end head is a rectangular blind hole, and the socket on the boss corresponding to the right end cover that matches the supporting shaft is a circular blind hole.

[0014] Furthermore, a limiting ring is provided outside the boss, the inner diameter of the limiting ring is smaller than the outer diameter of the head of the left-turn block and the right-turn block, and the outer diameter of the limiting ring is not smaller than the outer diameter of the head of the left-turn block and the right-turn block.

[0015] Furthermore, coaxial inner limiting holes are provided on the left-turn block and the right-turn block, and coaxial outer limiting holes are provided on the bosses on the left end cover and the right end cover, which pass through the bosses and the cover body. The aperture of the outer limiting hole is smaller than the aperture of the inner limiting hole. The distance between the axis of the outer limiting hole on the left end cover and the central axis of the left-turn block is equal to the distance between the axis of the inner limiting hole on the left-turn block and the central axis of the left-turn block. The distance between the axis of the outer limiting hole on the right end cover and the central axis of the right-turn block is equal to the distance between the axis of the inner limiting hole on the right-turn block and the central axis of the right-turn block.

[0016] The present invention is applied to an end cover combination for a rectangular frame and an exhibition stand including the end cover combination. When the left end cover and the right end cover are respectively buckled and fixed on the left and right ends of the rectangular frame, the end of the frame is inserted into the slot between the outer fixing frame and the inner supporting frame. The inner supporting plate on the inner supporting frame fits with the inner wall of the frame, which has a good supporting effect on the rectangular frame, improves the structural strength of the frame, and reduces the probability of frame deformation. At the same time, the end cover combination will not encroach on or interfere with the internal space of the frame, which is conducive to the smooth assembly of the subsequent internal structure of the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the assembly of the existing display rack frame, end cover and inner panel;

[0018] Figure 2 This is a schematic diagram of the assembly of the end cover and frame of the display stand of this application;

[0019] Figure 3 This is a schematic diagram of the display stand shaft and its internal structure for this application;

[0020] Figure 4 This is a schematic diagram of the left cover structure of the display stand for this application;

[0021] Figure 5 This is a schematic diagram of the right cover structure of the display stand for this application;

[0022] Figure 6 This is a schematic diagram of the cross-sectional structure of the left-turn block of the display stand in this application;

[0023] Figure 7 For this application display stand left turn block right view;

[0024] Figure 8This is a schematic diagram of the cross-sectional structure of the right-turn block of the display stand in this application;

[0025] Figure 9 For this application display stand right turn block left view;

[0026] Figure 10 This is a schematic diagram of the shaft structure of the display stand for this application.

[0027] In the figure: 1. frame, 2. embedded plate, 3. end plate, 4. weld, 5. bolt, 6. left end cover, 7. right end cover, 8. boss, 9. limiting ring, 10. inner support plate, 11. outer fixing plate, 12. slot, 13. rectangular blind hole, 14. circular blind hole, 15. outer limiting hole, 16. torsion spring rod, 17. torsion spring, 18. rectangular end, 19. forked end, 20. left turn block, 21. right turn block, 22. fixing hole, 23. inner limiting hole, 24. supporting shaft, 25. slot, 26. rotating shaft, 27. clamping strip, 28. connecting piece. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] The end cover assembly of the present embodiment is applied to a rectangular frame, and the buckle cover is fixed on the left and right ends of the rectangular frame. Figures 2 to 10 As shown, it includes a left end cover 6 and a right end cover 7. The left end cover 6 is buckled on the left end portion of the frame, and the right end cover 7 is buckled on the right end portion of the frame. The edges of the inner side surfaces relatively arranged on the left end cover 6 and the right end cover 7 are provided with an outer fixing frame formed by an outer fixing plate 11 and an inner supporting frame formed by an inner supporting plate 10. The outer fixing frame surrounds the inner supporting frame, and a slot 12 is formed between the two for the end portion of the rectangular frame to be inserted. The outer fixing frame and the inner supporting frame are also matched with a plurality of pairs of coaxially arranged fixing holes. Each pair of fixing holes is matched with a fixing member, and the fixing member is preferably a bolt. Accordingly, the fixing hole located on the outer fixing frame is a through hole, and the fixing hole located on the inner supporting frame is a threaded hole. In addition, matching through holes are required to be opened at the corresponding positions on the side walls of the frame ends, and the frame ends are inserted into the slots 12 between the outer fixing frame and the inner supporting frame. The bolts pass through the through holes on the outer fixing frame, the through holes on the side walls of the frame ends in turn, and are screwed into the threaded holes on the inner supporting frame.

[0030] When this end cover combination is buckled on the left and right ends of the rectangular frame, the end of the frame is inserted into the slot 12 between the outer fixed frame and the inner support frame, and the inner support plate 10 on the inner support frame fits with the inner wall of the frame, which has a good supporting effect on the rectangular frame, improves the structural strength of the frame, and reduces the probability of frame deformation. At the same time, this end cover combination will not encroach on or interfere with the internal space of the frame, which is conducive to the smooth assembly of the subsequent internal structure of the frame.

[0031] In this end cap assembly, the length of the inner support plate 10 is greater than that of the outer fixing plate 11. The size of the inner support frame formed by the inner support plate 10 is correspondingly increased, thereby enhancing the inner support frame's support for the rectangular frame, further improving the structural strength of the frame and reducing the probability of frame deformation. Furthermore, the edges of the outer fixing plate 11 can be tilted and extended outward, thereby giving the outer fixing frame an overall bell-shaped edge. This increases the distance between the outer fixing frame edge and the inner support frame, making it easier to insert the frame end into the slot 12. Furthermore, reinforcing ribs can be provided between the inner support plate 10 and the cover body to further enhance the inner support frame's support for the rectangular frame.

[0032] A display stand includes the above-mentioned end cover assembly applied to a rectangular frame, and also includes a rectangular frame 1, a rotating shaft 26 and a connecting piece 28. The left end cover 6 in the end cover assembly is fixed to the left end of the frame 1 by a buckle, and the right end cover 7 in the end cover assembly is fixed to the right end of the frame 1 by a buckle. Bosses 8 are provided in the center of the inner side surfaces opposite to each other on the left end cover 6 and the right end cover 7. The rotating shaft 26 is supported and arranged between the bosses 8. The connecting piece 28 is provided on the rotating shaft 26. The rotating shaft 26 has a through hollow cavity, in which a reset component capable of automatic retraction is provided. Similar to other structures of existing exhibition stands, an opening is also provided on the upper side of the frame 1 of this exhibition stand for extending or retracting the cloth. The cloth is fixed on the connecting piece 28 and is rolled up on the rotating shaft 26 under the action of the reset assembly. When exhibiting, the cloth is extended and supported by the support rods that can be spliced ​​and combined. Rotatable support feet are also provided under the frame 1. Normally, the support feet are stored under the frame 1 in a manner parallel to the length of the frame 1. When exhibiting, the support feet are rotated to be perpendicular to the frame 1 to prevent the exhibition stand from tipping over. The above structure is the conventional structure of the existing exhibition stand and is not the innovation of this product. Therefore, only a brief introduction is given. Its detailed structure can be found in the existing exhibition stand.

[0033] In this exhibition stand, refer to the attached Figures 2 to 5As shown, the reset assembly includes a torsion spring rod 16, a torsion spring 17, a left-turn block 20 and a right-turn block 21. The torsion spring rod 16 is arranged in the hollow cavity of the rotating shaft 26, and its left end is rotatably connected with a left-turn block 20. The left-turn block 20 and the left end of the torsion spring rod 16 are clearance-matched. In order to prevent the left-turn block 20 from moving axially on the torsion spring rod 16, when assembling, a collar can be provided on the torsion spring rods 16 adjacent to the left and right sides of the left-turn block 20 to limit its position. The left-turn block 20 is fixedly arranged in the cavity at the left end of the rotating shaft 26, and the right-turn block 21 is fixedly set in the right end cavity of the rotating shaft 26, the torsion spring 17 is sleeved on the torsion spring rod 16, the left end of the torsion spring 17 is fixed on the left-turn block 20, and the right end of the torsion spring 17 is fixed on the right end of the torsion spring rod 16. The left end of the torsion spring rod 16 is provided with a rectangular end head 18, and the right end of the right-turn block 21 is provided with a support shaft 24. The left end cover 6 corresponds to the boss 8 and is provided with a socket matching the rectangular end head 18. The right end cover 7 corresponds to the boss 8 and is provided with a socket matching the support shaft 24. The support shaft 24 is clearance-fitted with the socket. The rectangular end 18 on the torsion spring rod 16 is inserted into the socket on the corresponding boss 8 of the left end cover 6. After the left end cover 6 is fixed to the frame 1, due to the limitation of the rectangular end 18 and the corresponding socket, the torsion spring rod 16 cannot rotate, and the right end of the torsion spring 17 fixedly connected to the torsion spring rod 16 cannot rotate accordingly. The left turning block 20 at the left end of the rotating shaft 26 can rotate on the torsion spring rod 16, and the right turning block 21 at the right end of the rotating shaft 26 can rotate in the socket of the right end cover 7, When the cloth is extended, under the pulling action of the cloth, the rotating shaft 26 drives the left rotating block 20 and the right rotating block 21 to rotate synchronously, and the left end of the torsion spring 17 fixed on the left rotating block 20 also rotates accordingly. The torsion spring 17 deforms and stores force. As the cloth is extended more, the stored force of the torsion spring 17 also increases accordingly. After the exhibition is over, the pulling force on the cloth is removed, the torsion spring 17 releases the stored force, and drives the left rotating block 20 to reverse. The left rotating block 20 drives the rotating shaft 26 to reverse synchronously to rewind the cloth onto the rotating shaft 26.

[0034] In this exhibition stand, specifically, refer to the attached Figures 6 to 9 As shown, the left-turn block 20 and the right-turn block 21 each include a head and a plug-in portion. The outer diameter of the head is larger than the outer diameter of the plug-in portion. A plurality of slots 25 are radially formed on the outer wall of the plug-in portion. A plurality of clips 27 are radially provided on the inner wall of the hollow cavity of the rotating shaft 26 to match the slots 25 on the plug-in portion. The outer diameter of the head is larger than the inner diameter of the hollow cavity of the rotating shaft 26, while the outer diameter of the plug-in portion is not larger than the inner diameter of the hollow cavity of the rotating shaft 26. During assembly, the plug-in portion of the left-turn block 20 mounted on the torsion spring rod 16 is inserted into the cavity at the left end of the rotating shaft 26 so that the head of the left-turn block 20 abuts against the left end of the rotating shaft 26. When installing the left-turn block 20, the torsion spring rod 16 and the torsion spring 17 are simultaneously assembled in the hollow cavity of the rotating shaft 26. Then, the plug-in portion of the right-turn block 21 is inserted into the cavity at the right end of the rotating shaft 26 so that the head of the right-turn block 21 abuts against the right end of the rotating shaft 26.

[0035] In this display stand, specifically, the left-turn block 20 has a fixing hole 22 along its axial direction, and the left end of the torsion spring 17 is inserted into the fixing hole 22. When the left-turn block 20 rotates, the left end of the torsion spring 17 can be driven to rotate.

[0036] In this display stand, specifically, the right end of the torsion spring rod 16 is a forked end 19, and the right end of the torsion spring 17 is wound around the forked end 19. When winding, the right end of the torsion spring 17 can be first wound around one fork of the forked end 19 for several turns, and then wound around the other forks for several turns to enhance the fixation of the right end of the torsion spring 17 and the torsion spring rod 16.

[0037] In this display stand, the socket on the left end cover 6 corresponding to the boss 8 that matches the rectangular end head 18 is a rectangular blind hole 13, and the socket on the right end cover 7 corresponding to the boss 8 that matches the support shaft 24 is a circular blind hole 14. The blind hole structure is set up. After assembly is completed, the rectangular end head 18 and the support shaft 24 are not exposed, preventing adverse effects on the internal structure due to bumps during use.

[0038] In this exhibition stand, a limit ring 9 is provided outside the boss 8. The inner diameter of the limit ring 9 is smaller than the outer diameter of the head of the left-turn block 20 and the right-turn block 21, and the outer diameter of the limit ring 9 is not smaller than the outer diameter of the head of the left-turn block 20 and the right-turn block 21. The limit ring 9 cooperates with the boss 8 to limit the axial range of movement of the rotating shaft 26 and the left-turn block 20 and the right-turn block 21, thereby ensuring the assembly fit between the various components.

[0039] In this exhibition stand, coaxial inner limiting holes 23 are provided on the left-turn block 20 and the right-turn block 21. When assembling the left-turn block 20 and the right-turn block 21 at both ends of the rotating shaft 26, care should be taken to ensure that the inner limiting holes 23 on the left-turn block 20 and the right-turn block 21 are in a coaxial position. The boss 8 on the left end cover 6 and the right end cover 7 is provided with a coaxial outer limiting hole 15 that passes through the boss 8 and the cover body. The aperture of the outer limiting hole 15 is smaller than the aperture of the inner limiting hole 23. The distance between the axis of the outer limiting hole 15 on the left end cover 6 and the center axis of the left-turn block 20 is equal to the distance between the axis of the inner limiting hole 23 on the left-turn block 20 and the center axis of the left-turn block 20. The distance between the axis of the outer limiting hole 15 on the right end cover 7 and the center axis of the right-turn block 21 is equal to the distance between the axis of the inner limiting hole 23 on the right-turn block 21 and the center axis of the right-turn block 21.

[0040] When the display stand is first connected to the connecting piece 28 on the rotating shaft 26, it is necessary to rotate the rotating shaft 26 to the state where the torsion spring 17 is charged. The specific operation method can be carried out as follows: keep the left end cover 6 fixedly installed on the left end of the frame 1, extend the rotating shaft 26 from the right end of the frame 1 and make the rectangular end 18 on the torsion spring rod 16 be inserted into the socket on the corresponding boss 8 of the left end cover 6, rotate the rotating shaft 26, and the rotating shaft 26 drives the left rotating block 20 and the right rotating block 21 to rotate synchronously. The left rotating block 20 drives the left end of the torsion spring 17 to rotate accordingly. 7 is deformed and stored until the storage is completed, and a limit pin or thin rod is used to be inserted from the outer limit hole 15 corresponding to the left end cover 6, and the rotation shaft 26 is appropriately rotated forward or reversed to adjust the position of the inner limit hole 23 on the left turn block 20 so that the limit pin or thin rod can continue to be inserted into the inner limit hole 23 on the left turn block 20. After the insertion is completed, the rotation shaft 26 cannot rotate, and then the spread is connected to the connecting piece 28 and the right end cover 7 is fixedly installed on the right end of the frame 1. Finally, the limit pin or thin rod is pulled out, the torsion spring 17 releases the stored force, and the spread is then rolled on the rotation shaft. In the above process, the limit pin or thin rod only needs to connect the outer limit hole 15 corresponding to the left end cover 6 and the inner limit hole 23 on the left turn block 20, which reduces the difficulty of operation and the requirements for product precision and assembly precision, and can effectively reduce the manufacturing cost of the product. When the display fabric of this display stand is extended for display, to reduce the force on the support rod, a limit pin or thin rod can be inserted into the outer limit hole 15 corresponding to the left end cap 6 and the inner limit hole 23 on the left-turn block 20 to offset the rewinding force of the torsion spring 17 on the display fabric. To ensure balanced force on both sides, a limit pin or thin rod can also be inserted into the outer limit hole 15 corresponding to the right end cap 7 and the inner limit hole 23 on the right-turn block 21. Furthermore, in this display stand, the outer limit hole 15 has a smaller diameter than the inner limit hole 23. The larger diameter of the inner limit hole 23 facilitates smooth connection and insertion between the two holes.

[0041] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An end cover assembly applied to a rectangular frame, wherein the buckle covers are fixed to the left and right ends of the rectangular frame, characterized in that: The frame comprises a left end cover (6) and a right end cover (7), wherein the left end cover (6) is buckled on the left end portion of the frame, and the right end cover (7) is buckled on the right end portion of the frame, and edges of the inner side surfaces of the left end cover (6) and the right end cover (7) which are arranged opposite to each other are provided with an outer fixing frame formed by an outer fixing plate (11) and an inner supporting frame formed by an inner supporting plate (10), wherein the outer fixing frame surrounds the inner supporting frame. A slot (12) is formed between the two for inserting the end of the rectangular frame. The outer fixing frame and the inner supporting frame are also matched with a plurality of pairs of coaxially arranged fixing holes, and each pair of fixing holes is matched with a fixing piece.

2. The end cover assembly for a rectangular frame according to claim 1, characterized in that: The length of the inner support plate (10) is greater than the length of the outer fixing plate (11).

3. An exhibition stand, characterized by: The invention comprises an end cover assembly applied to a rectangular frame as described in any one of claims 1 to 2, and also comprises a rectangular frame (1), a rotating shaft (26) and a connecting piece (28), wherein the left end cover (6) in the end cover assembly is fixed to the left end portion of the frame (1), and the right end cover (7) in the end cover assembly is fixed to the right end portion of the frame (1), bosses (8) are provided at the center of the inner side surfaces that are oppositely arranged on the left end cover (6) and the right end cover (7), the rotating shaft (26) is supported and arranged between the bosses (8), a connecting piece (28) is provided on the rotating shaft (26), and the rotating shaft (26) is provided with a through hollow cavity, in which a reset component capable of automatic reeling is provided.

4. The display stand according to claim 3, wherein: The reset assembly comprises a torsion spring rod (16), a torsion spring (17), a left-turn block (20) and a right-turn block (21), wherein the torsion spring rod (16) is arranged in the hollow cavity of the rotating shaft (26), and the left end thereof is provided with a left-turn block (20) for rotation connection, the left-turn block (20) is fixedly arranged in the left end cavity of the rotating shaft (26), and the right-turn block (21) is fixedly arranged in the right end cavity of the rotating shaft (26), the torsion spring (17) is sleeved on the torsion spring rod (16), and the torsion spring (17) is sleeved on the torsion spring rod (16). 7) The left end is fixed on the left-turn block (20), the right end of the torsion spring (17) is fixed on the right end of the torsion spring rod (16), the left end of the torsion spring rod (16) is provided with a rectangular end head (18), the right end of the right-turn block (21) is provided with a support shaft (24), the left end cover (6) is provided with a socket matching the rectangular end head (18) on the corresponding boss (8), and the right end cover (7) is provided with a socket matching the support shaft (24) on the corresponding boss (8).

5. The display stand according to claim 4, characterized in that: The left-turn block (20) and the right-turn block (21) both comprise a head and a plug-in portion, the outer diameter of the head being larger than the outer diameter of the plug-in portion, a plurality of slots (25) being radially provided on the outer wall of the plug-in portion, a plurality of clips (27) matching the slots (25) on the plug-in portion being radially provided on the inner wall of the hollow cavity of the rotating shaft (26), the outer diameter of the head being larger than the inner diameter of the hollow cavity of the rotating shaft (26), and the outer diameter of the plug-in portion being no larger than the inner diameter of the hollow cavity of the rotating shaft (26).

6. The display stand according to claim 4, characterized in that: The left-turn block (20) is provided with a fixing hole (22) along its axial direction, and the left end of the torsion spring (17) is inserted into the fixing hole (22).

7. The display stand according to claim 4, characterized in that: The right end of the torsion spring rod (16) is a forked end (19), and the right end of the torsion spring (17) is wound around the forked end (19).

8. The display stand according to claim 4, wherein: The socket on the corresponding boss (8) of the left end cover (6) that matches the rectangular end head (18) is a rectangular blind hole (13), and the socket on the corresponding boss (8) of the right end cover (7) that matches the supporting shaft (24) is a circular blind hole (14).

9. The display stand according to claim 4, characterized in that: A limiting ring (9) is provided outside the boss (8), the inner diameter of the limiting ring (9) is smaller than the outer diameter of the head of the left-turn block (20) and the right-turn block (21), and the outer diameter of the limiting ring (9) is not smaller than the outer diameter of the head of the left-turn block (20) and the right-turn block (21).

10. The display stand according to claim 4, characterized in that: The left-turn block (20) and the right-turn block (21) are provided with coaxial inner limiting holes (23); the bosses (8) on the left end cover (6) and the right end cover (7) are provided with coaxial outer limiting holes (15) that pass through the bosses (8) and the cover body; the diameter of the outer limiting hole (15) is smaller than the diameter of the inner limiting hole (23); the distance between the axis of the outer limiting hole (15) on the left end cover (6) and the central axis of the left-turn block (20) is equal to the distance between the axis of the inner limiting hole (23) on the left-turn block (20) and the central axis of the left-turn block (20); the distance between the axis of the outer limiting hole (15) on the right end cover (7) and the central axis of the right-turn block (21) is equal to the distance between the axis of the inner limiting hole (23) on the right-turn block (21) and the central axis of the right-turn block (21).

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