A mechanism for shelf connection and folding and a shelf

Abstract

The utility model relates to a display stand technical field especially a kind of mechanism and display stand for display stand connection and folding, first inner tube is used to be connected with a bar piece;Second inner tube is used to be connected with adjacent another bar piece;Movable hinged joint is connected with first inner tube and second inner tube respectively at both ends;Spring shaft is connected with one end of movable hinged joint by passing through first inner tube;Elastic member is sleeved on spring shaft;In folding process, movable hinged joint is pulled, it is partially removed from first inner tube, and movable hinged joint is driven to compress elastic member along the axial displacement of first inner tube, to further fold the bar piece connected with second inner tube, flexibly adapt to different application scenarios needing directional folding or multidirectional rotation, high versatility, high space utilization, compact structure;Realize the quick folding and unfolding of display stand, without disassembly and unlocking, and the display stand after disassembly is convenient to store and carry, further improve the use convenience of display stand, and stable.

Description

Technical Field

[0001] This utility model relates to the field of display stand technology, and in particular to a mechanism and display stand for connecting and folding display stands. Background Technology

[0002] As a core support device for commercial displays, exhibition setups, and store promotions, the ease of assembly and the flexibility of disassembly directly determine the efficiency of event preparation and site adaptability. Currently, most portable display stands on the market adopt a modular design. A typical structure includes two uprights, a base, and a crossbeam. The uprights and crossbeams are often composed of several connecting rods. Locking pins enable quick locking of adjacent rods, and reinforcing ropes connect the rods into a single unit. Theoretically, installation can be completed simply by inserting adjacent rods and pressing the locking pins; disassembly is done by reversing the process. This initially meets the need for quick assembly and disassembly, and is widely used in clothing displays, electronic product displays, and poster advertising.

[0003] However, in long-term practical application, this "link splicing, tendon rope connection, and pin locking" display rack structure has problems such as insufficient convenience for display rack storage and carrying, limited size adaptability of modular splicing, poor stability, and easy failure, operation jamming, and low safety factor caused by the use of pin locking structure. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to solve the problems existing in the prior art in the background art, to provide a display rack that integrates driving, resetting and hinge functions into the tubular structure, has high space utilization and compact structure, and is easy to store and carry after disassembly.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a mechanism for connecting and folding display stands, which includes... The first inner tube is used to connect to a rod; The second inner tube is used to connect to another adjacent rod; A movable hinged joint, the two ends of which are respectively connected to the first inner tube and the second inner tube; A spring shaft passes through the first inner tube and connects to one end of a movable hinge joint, used for power transmission and motion guidance; The elastic element, which is sleeved on the spring shaft, is a spring and is used to provide restoring force and cushioning; During the folding process, the movable hinge joint is stretched, and part of it moves out of the first inner tube, causing the movable hinge joint to move axially along the first inner tube to compress the elastic element, thereby causing the rod connected to the second inner tube to fold.

[0006] Furthermore, the movable hinge joint is a directional linkage assembly that converts axial linear motion into bending motion in a single plane, achieving directional and controllable folding; It includes two sliding shafts and a connecting rod shaft. The sliding shaft is a bidirectional motion conversion and connection hub, and the connecting rod shaft is a directional folding transmission arm and limiting structure. The two ends of the connecting rod shaft are respectively hinged to the two sliding shafts by a pair of lifting screws. One sliding shaft is placed in the inner cavity of the first inner tube and slides along its axial direction in the inner cavity of the first inner tube. The other sliding shaft is connected to the second inner tube.

[0007] Furthermore, the connecting rod shaft includes a connecting rod shaft body, both ends of which are concave arc surfaces, and both ends of the connecting rod shaft body are provided with several outwardly extending protrusions to separate multiple mounting ports. Each convex bar has a first pin hole on its body, and the end of each convex bar is an outwardly convex arc-shaped part; The diameter of the convex arc portion of each convex bar is smaller than the length of its body, and a step is formed between the convex arc portion of the convex bar and its body.

[0008] Furthermore, the sliding shaft includes a sliding shaft body, the end of which is provided with several opening slots that cooperate with the protrusions in the connecting rod shaft, the sliding shaft body is provided with a second pin hole that passes through the opening slots for the pry screw to pass through, and the sliding shaft body is provided with a second mounting hole for installing a limiting pin. The bottom of the opening groove is a concave arc surface, and a limiting plate is provided at one side opening of the opening groove to close the side of the opening. In the unfolded state, the limiting plate abuts against the step at the corresponding part of the connecting rod shaft to limit the folding direction and folding angle of the connecting rod shaft.

[0009] Furthermore, the concave arc surface of either or both sliding shafts is a stepped concave arc surface, which is different from a smooth arc surface. Its stepped design can form new contact points with the steps of the connecting rod shaft at different positions on the folding path, thereby limiting the folding direction and folding angle of the connecting rod shaft during the folding process.

[0010] Furthermore, the movable hinge joint is a universal ball joint assembly, which enables multi-directional and flexible folding through the multi-degree-of-freedom rotation of the ball joint, adapting to more complex folding scenarios.

[0011] Furthermore, the first inner tube has an installation chamber to provide space for the internal moving parts such as spring shafts and sliding shafts to be accommodated, guided and protected. The outer peripheral wall of the first inner tube is provided with several limiting grooves extending along its axial direction and at least one first installation hole. The bottom of the first inner tube is provided with a through hole for the spring shaft to pass through. In the movable hinge joint, a sliding shaft is located in the mounting cavity, and a limiting pin passes through the limiting groove and connects to the sliding shaft to limit the sliding stroke of the sliding shaft and prevent the mechanism from disengaging.

[0012] A display stand includes a base, a crossbeam, and pairs of uprights. Each upright consists of several connecting rods connected end to end, and adjacent connecting rods are connected by a mechanism for connecting and folding the display stand as described in any of the above claims.

[0013] Furthermore, short shafts are installed vertically at both ends of the base, and the short shafts are connected to the bottom connecting rod of the column, and the crossbeam is connected to the top connecting rod of the column, as described above, by a mechanism for connecting and folding the display stand.

[0014] Furthermore, the length L of the short axis is less than or equal to the height H of the crossbeam, which facilitates the synchronization of the display rack when unfolding or folding, and also prevents the crossbeam from being too high to be folded or stored properly.

[0015] The beneficial effects of this utility model are: 1. The folding mechanism achieves universal or unidirectional folding through the first inner tube, movable hinge joint, second inner tube, spring shaft, and spring components. It can flexibly adapt to different application scenarios that require directional folding or multi-directional rotation, and has strong versatility. At the same time, the movable hinge joint, spring shaft, and spring components ensure rapid and automatic unfolding after folding, making operation convenient. In addition, the driving, reset, and hinge functions are highly integrated inside the tubular structure, resulting in high space utilization and a compact structure. 2. When assembling and storing the display rack, the folding mechanism in the display rack can realize the quick folding and unfolding of the display rack without disassembly and unlocking. The disassembled display rack is easy to store and carry, further improving the ease of use of the display rack, and it is also very stable. 3. The absence of a pin-locking mechanism prevents problems such as pin-locking failure and operational jamming, resulting in a high safety factor and preventing accidental injury. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a structural schematic diagram of embodiment 1 of the folding mechanism; Figure 2 This is a utility model Figure 1 Exploded view; Figure 3 This is a schematic diagram of the connecting shaft of this utility model; Figure 4 This is a schematic diagram of the sliding shaft installed inside the first inner tube in Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the sliding shaft installed on the second inner tube in Embodiment 1 of this utility model; Figure 6 This is a schematic diagram of the structure of the first inner tube in Embodiment 1 of this utility model; Figure 7 This is a schematic diagram of the structure of Embodiment 1 of this utility model after being folded at 90°; Figure 8 This is a schematic diagram of the structure of Embodiment 1 of this utility model after being folded 180°; Figure 9 This is the initial state of the display stand in Embodiment 1 of this utility model; Figure 10 This is a diagram showing the state of the display stand after one of its pillars has been lifted. Figure 11 This is a diagram showing the state of the display stand after the two uprights are raised. Figure 12 This is a diagram showing the upper display stand when the present invention is folded. Figure 13 This is a diagram showing the upper display stand of this utility model after it has been folded up; Figure 14 This is a diagram showing the display stand after it has been fully unfolded. In the diagram: 1. First inner tube, 11. Limiting groove, 12. First mounting hole, 13. Through hole, 14. Limiting pin. 2. Second inner tube, 3. Movable hinged joint, 31. Sliding shaft; 311. Opening groove; 312. Second pin hole; 313. Limiting plate; 314. Concave arc-shaped surface; 315. Second mounting hole. 32. Connecting rod shaft; 321. Raised rib; 322. Mounting port; 323. First pin hole. 4. Spring shaft, 5. Elastic components, 6. Base, 7. Horizontal beam, 8. Column. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0019] Example 1: like Figures 1-8 The illustrated mechanism for connecting and folding display stands includes... The first inner tube 1 is used to connect to a rod, which is a connecting rod, and the first inner tube 1 is fixedly connected to the connecting rod; The second inner tube 2 is used to connect with another adjacent rod, which is a connecting rod, and the second inner tube 2 is fixedly connected to the connecting rod. The movable hinge joint 3 has its two ends connected to the first inner tube 1 and the second inner tube 2, respectively. Spring shaft 4 passes through the first inner tube 1 and is connected to one end of the movable hinge joint 3. It directly transmits the axial tension of the movable hinge joint 3 to the elastic element and slides in the through hole 13 of the first inner tube 1, providing stable axial guidance for the entire motion system and ensuring that the folding and unfolding process is smooth and does not jam. The elastic element 5, which is sleeved on the spring shaft 4, is a spring in this embodiment 1. It is compressed during folding to store elastic potential energy. When the external force is removed, it releases energy to push the spring shaft 4 and the movable hinge joint 3 to reset, realizing the automatic unfolding of the mechanism. At the same time, its elastic characteristics can absorb some of the impact during the folding process, making the operation more gentle and stable, and protecting the mechanism from damage by rigid impact. During the folding process, the movable hinge joint 3 is stretched, and part of it moves out of the first inner tube 1, which in turn causes the movable hinge joint 3 to move axially along the first inner tube 1 to compress the elastic element 5, thereby causing the rod connected to the second inner tube 2 to fold.

[0020] The movable hinge joint 3 is a directional connecting rod assembly, including two sliding shafts 31 and a connecting rod shaft 32. The two ends of the connecting rod shaft 32 are respectively hinged to the two sliding shafts 31 by a pair of lifting screws. One sliding shaft 31 is placed in the inner cavity of the first inner tube 1 and slides along its axial direction in the inner cavity of the first inner tube. The other sliding shaft 31 is connected to the second inner tube 2 to form an integral structure.

[0021] Among them, the two sliding shafts 31 are respectively the first sliding shaft installed in the first inner tube 1 and the second sliding shaft fixedly connected to the second inner tube; In the directional linkage assembly, one end of the first sliding shaft slides axially within the first inner tube 1, while the other end is radially hinged through the connecting rod shaft 32, serving as a bridge connecting linear motion and rotational motion. The opening groove 311, the second pin hole 312, and other structures on it are precisely matched with the connecting rod shaft 32, together forming the hinge point.

[0022] like Figure 3 As shown, the connecting rod shaft 32 acts as a lever, transmitting the motion from one end to the other end, realizing the linkage between the two sliding shafts 31, thereby driving the second inner tube 2 to complete the folding action; the connecting rod shaft 32 includes a connecting rod shaft body, both ends of the connecting rod shaft body are concave arc surfaces, and both ends of the connecting rod shaft body are provided with several outwardly extending protrusions 321, which separate multiple mounting ports 322; Each convex bar 321 has a first pin hole 323 on its body, and the end of each convex bar 321 is an outwardly convex arc-shaped part. The diameter of the convex arc portion of each convex strip 321 is smaller than the length of its strip body, and a step is formed between the convex arc portion of the convex strip 321 and its strip body.

[0023] like Figures 4-5As shown, the sliding shaft 31 includes a sliding shaft body. The end of the sliding shaft body is provided with several opening slots 311 that cooperate with the protrusions 321 in the connecting rod shaft 32. The protrusions 321 in the connecting rod shaft 32 are inserted into the opening slots 311. The sliding shaft body is provided with a second pin hole 312 that passes through the opening slots 311 for the pry screw to pass through, thereby forming a hinge between the sliding shaft 31 and the connecting rod shaft 32. The sliding shaft body is provided with a second mounting hole 315 for mounting a limiting pin 14, thereby limiting the sliding stroke of the sliding shaft 31 and preventing the mechanism from disengaging. The bottom of the opening groove 311 is a concave arc surface 314, which cooperates with the convex arc part of the connecting shaft 32. A limiting plate 313 is provided at one side opening of the opening groove 311 to close the side opening. In the unfolded state, the limiting plate 313 abuts against the step of the corresponding part in the connecting rod shaft 32, mechanically limiting the starting direction and maximum angle of folding, and ensuring the stability of the unfolded state.

[0024] The concave arc surface 314 of either or both sliding shafts 31 is a stepped concave arc surface, used to limit the folding direction and folding angle of the connecting rod shaft 32 during folding. In this embodiment 1, for example... Figure 4 As shown, the concave arc surface 314 of the first sliding shaft is a stepped concave arc surface; as Figure 5 As shown, the concave arc surface 314 of the second sliding shaft is a smooth concave arc surface.

[0025] like Figure 6 As shown, the first inner tube 1 has an installation chamber. The outer peripheral wall of the first inner tube 1 is provided with several limiting grooves 11 extending along its axial direction and at least one first installation hole 12. Screws are screwed into the first installation hole 12 to fix the first inner tube 1 to the connecting rod. At the same time, the bottom of the first inner tube 1 is provided with a through hole 13 for the spring shaft 4 to pass through. In the movable hinge joint 3, a sliding shaft 31 (i.e., the first sliding shaft) is located in the mounting cavity. The limiting pin 14 passes through the limiting groove 11 and is connected to the sliding shaft 31 to limit the sliding stroke of the sliding shaft 31.

[0026] The limiting pin 14 and the limiting groove 11 work together to form a "sliding pair", which allows the first sliding shaft to move axially within a certain range, while preventing it from over-extending or detaching from the first inner tube 1. This is a safety device that ensures the reliability of the mechanism's operation.

[0027] Specifically: The two sliding shafts 31 are respectively a first sliding shaft installed in the first inner tube 1 and a second sliding shaft fixedly connected to the second inner tube; Taking the folding mechanism in its unfolded state as an example, such as Figure 1 As shown, at this time, the sliding shaft 31, the connecting shaft 32, and the second sliding shaft are all located inside the first inner tube 1; When folded at 90°: as shown Figure 7 As shown, an outward force is applied to the second inner tube 2, pulling the first sliding shaft, connecting shaft 32, and second sliding shaft out of the mounting chamber of the first inner tube 1, thereby driving the spring shaft 4 to move axially, thereby compressing the elastic element 5 to store energy, and the limiting stroke of the limiting groove 11 reaches its maximum. Then, a folding force is applied, causing the connecting shaft 32 and the second inner tube 2 to fold from a vertical state to a horizontal state, completing a 90° fold. When folded 180°: as shown Figure 8 As shown, the folding force is continued to be applied, causing the second inner tube 2 to flip from a horizontal state to a vertical state, and the second inner tube 2 and the first inner tube 1 are parallel to each other, completing a 180° fold.

[0028] When unfolded, the second inner tube 2 and the connecting shaft 32 are folded over so that the first inner tube 1 and the second inner tube 2 are on the same axis. At this time, there is no external force, and the compressed elastic element 5 releases energy, pushing the spring shaft 4 and the directional connecting rod assembly to reset, thereby restoring the mechanism to the unfolded state.

[0029] like Figures 9-14 As shown, a display stand includes a base 6, a crossbeam 7, and a pair of uprights 8. The uprights 8 are composed of several connecting rods connected end to end in sequence. Adjacent connecting rods are connected by a mechanism for connecting and folding the display stand as described above. When the directional connecting rod assembly is folded, the directional connecting rod assembly is configured and installed according to the folding direction.

[0030] Short shafts are installed vertically at both ends of the base 6. The length L of the short shafts is less than or equal to the height H of the crossbeam 7. The short shafts are connected to the bottom connecting rod of the column 8, and the crossbeam 7 is connected to the top connecting rod of the column 8 through a mechanism for connecting and folding the display rack as described above.

[0031] like Figure 9 As shown, taking column 8, which consists of two connecting rods, as an example: Each column 8 is divided into a top connecting rod and a bottom connecting rod. The column 8 is folded in half by a folding mechanism to divide the display rack into an upper display rack and a lower display rack. The upper display rack consists of a crossbeam 7 and a top connecting rod, and the lower display rack consists of a bottom connecting rod and a base 6. In the initial folded state, the two connecting rods of each column 8 are folded 180° apart; The two columns 8 in the initial folded state are folded at 90° with the crossbeam 7 and the minor axis, respectively; In the folding mechanism, the first inner tube 1 is installed at the bottom and the second inner tube 2 at the top, as follows: Figure 14 As shown; When expansion is required: Step 1: The operator lifts any column 8. At this time, the elastic element 5 in the folding mechanism, under the action of the compression force, pulls the sliding shaft 31 to slide down in the first inner tube 1. The sliding shaft 31 and the connecting rod shaft 32 both slide into the first inner tube 1. At this time, the bottom connecting rod and the short shaft in the column 8 are both in a vertical state. Step 2: The operator applies a downward force to the connecting rod at the bottom of the column, causing the sliding shaft 31 connected to the second inner tube 2 to also enter the first inner tube 1, completing the installation of one column. This converts the bending motion in a single plane into axial linear motion. Figure 10 As shown; Step 3: Repeat steps 1-2 above to install another column 8, thus completing the installation between the top connecting rod and the crossbeam 7, and the bottom connecting rod and the short shaft, as follows. Figure 11 As shown; Step 4: As Figure 12 As shown, the operator flips and lifts the upper display frame formed by the top connecting rod and the crossbeam 7. Under the action of the compression force, the elastic element 5 in the folding mechanism at the connection between the top and bottom connecting rods pulls the sliding shaft 31 downward in the first inner tube 1. Both the sliding shaft 31 and the connecting rod shaft 32 slide into the first inner tube 1. At this time, both the top and bottom connecting rods are in a vertical state. Figure 13 As shown; Step 5: The operator applies a downward force to the top connecting rod, causing the sliding shaft 31 connected to the second inner tube 2 to also enter the first inner tube 1, completing the unfolding of the display frame. Figure 14 As shown.

[0032] When folding is required: Step 6: First, fold the display stand in half 180° from the middle. Specifically: apply an upward force to the top connecting rod to pull the sliding shaft 31 connected to the second inner tube 2 out of the first inner tube 1, thereby separating the top connecting rod from the bottom connecting rod until the sliding stroke of the sliding shaft 31 in the first inner tube 1 reaches its maximum. At this time, the ends of the connecting rod shaft 32 and the sliding shaft 31 both extend out of the first inner tube 1, and the top connecting rod and the bottom connecting rod can be folded 180°, that is, the upper display stand and the lower display stand are folded 180° apart. Step 7: Fold both sides of the display stand inward by about 90° to store them. Specifically: Apply an upward force to the bottom connecting rod to separate the two ends of the bottom connecting rod from the crossbeam and the short shaft respectively, and fold them inward by 90° to complete the folding and storage of the display stand. At this time, the elastic element 5 is in a compressed state, so that the first sliding shaft obtains a large tension force, and the distance of movement of the first sliding shaft is limited by the limiting groove 11 on the first inner tube 1.

[0033] Example 2: The difference from Embodiment 1 is that the movable hinge joint 3 is a universal ball joint assembly. The specific structure of the universal ball joint assembly is not shown. Any universal ball joint assembly that can enable universal rotation between the first inner tube 1 and the second inner tube 2 is acceptable, thereby achieving flexible rotation in multiple directions. When applied to display racks, it is convenient for multi-directional folding and storage, and has strong versatility.

[0034] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

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