Folding device
By using a folding device with an elastic connecting component and a single torsion spring power source, the problems of increased friction and high reset cost in traditional folding devices are solved. This achieves bidirectional automatic reset and flexible connection of the folding component, thus improving its service life.
Patent Information
- Application Number
- CN202423018238.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Traditional folding mechanisms suffer from increased friction after prolonged use, leading to jamming, and the need for a power source for resetting them is costly.
The system employs an elastic connection component and utilizes a single torsion spring as a power source. It achieves bidirectional automatic reset through the limiting sleeves of the first and second hinge components and the stepped structure, thus avoiding increased friction and jamming.
It achieves bidirectional automatic centering function for the folding component, with a simple structure and high connection strength, avoiding jamming after long-term use and improving service life.
Smart Images
Figure CN223622010U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of rotating engineering components, specifically relating to pivot connection devices, and more particularly to a folding device. Background Technology
[0002] Folding devices are used for two objects that rotate relative to each other. Traditional folding devices consist of two folding seats and a rotating shaft. The two folding seats are fixed to the corresponding objects respectively, and the two folding seats are directly connected by the rotating shaft. After long-term use, the friction between the rotating shaft and the two folding seats increases, which leads to unstable assembly between the rotating shaft and the folding seats and affects the normal use of the folding device.
[0003] Meanwhile, the reset of traditional folding devices relies on the power provided by two objects, which requires the two objects to provide positioning functions, resulting in excessive costs.
[0004] Therefore, there is an urgent need to develop a new folding device to solve the technical problems of traditional folding devices being unable to reset and jamming due to increased friction.
[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content
[0006] This disclosure provides at least one folding device.
[0007] In a first aspect, embodiments of this disclosure provide a folding device, comprising: a first folding component, a second folding component, and a connecting component; wherein the connecting component passes through the first folding component and the second folding component, and the first folding component and the second folding component are respectively movably and limitingly connected to the connecting component; the first folding component is adapted to flip relative to the second folding component, and / or the second folding component is adapted to flip relative to the first folding component; and the connecting component is adapted to push the first folding component and / or the second folding component to reset.
[0008] In one optional embodiment, the first folding assembly includes: a first leaf and a first limiting sleeve; the outer wall of the first limiting sleeve is connected to the first leaf, and the connecting assembly passes through the first limiting sleeve; the inner wall of the first limiting sleeve is axially provided with two first steps, and the two first steps are symmetrical about the central axis of the first limiting sleeve, so that the two first steps limit the movement of the connecting assembly; the first leaf is adapted to drive the first limiting sleeve to rotate, so that the two first steps twist the connecting assembly; the connecting assembly is adapted to push the two first steps, thereby pushing the first limiting sleeve and the first leaf to reset.
[0009] In one optional embodiment, the second folding assembly includes: a second leaf and two second limiting sleeves; the outer walls of the two second limiting sleeves are connected to the second leaf, the two second limiting sleeves are respectively located on both sides of the first limiting sleeve, and the two second limiting sleeves and the first limiting sleeve are coaxially arranged so that the connecting assembly passes through the two second limiting sleeves; the inner wall of any second limiting sleeve is axially provided with two second steps, and the two second steps are symmetrical about the central axis of the second limiting sleeve, so that the two second steps limit the movement of the connecting assembly; the second leaf is adapted to drive each second limiting sleeve to rotate, so that each second step twists the connecting assembly; the connecting assembly is adapted to push each second step, thereby pushing the two second limiting sleeves and the second leaf to reset.
[0010] In one alternative implementation, one first step is aligned with two of the second steps, and another first step is aligned with the remaining two second steps.
[0011] In one optional embodiment, the connecting assembly includes: a reset unit, a first connecting unit, and a second connecting unit; the first connecting unit and the second connecting unit are movably connected to the reset unit, the first connecting unit and the second connecting unit are located on opposite sides of the reset unit, the reset unit is located within a first limiting sleeve, and the first connecting unit and the second connecting unit extend into corresponding second limiting sleeves; the first connecting unit rotates relative to the second connecting unit via the reset unit, and / or the second connecting unit is adapted to rotate relative to the first connecting unit via the reset unit.
[0012] In one optional embodiment, the reset unit includes a torsion spring; both sides of the torsion spring are respectively connected to a first connecting unit and a second connecting unit; the torsion spring is adapted to pull the first connecting unit and / or the second connecting unit to reset.
[0013] In one optional embodiment, the first connecting unit includes: a first connecting shaft and two first limiting members; the first connecting shaft is connected to a torsion spring, the two first limiting members are axially disposed on the surface of the first connecting shaft, and the two first limiting members are symmetrical about the central axis of the first connecting shaft; the first connecting shaft extends from the first limiting sleeve into the corresponding second limiting sleeve, and the first step, the second step and the first limiting member are misaligned.
[0014] In one optional embodiment, the second connecting unit includes: a second connecting shaft and two second limiting members; the second connecting shaft is connected to a torsion spring, the two second limiting members are axially disposed on the surface of the second connecting shaft, and the two second limiting members are symmetrical about the central axis of the second connecting shaft; the second connecting shaft extends from the second limiting sleeve into the corresponding second limiting sleeve, and the first step, the second step and the second limiting member are misaligned.
[0015] In one optional embodiment, a first limiting member on the first connecting shaft and a second limiting member on the second connecting shaft are respectively located on both sides of one of the first steps; another first limiting member on the first connecting shaft and another second limiting member on the second connecting shaft are respectively located on both sides of the other first step.
[0016] In one optional embodiment, the folding device further includes: two end caps; the two end caps respectively block the corresponding second limiting sleeves to limit the connecting components.
[0017] The beneficial effects of this utility model are that, by elastically connecting the first folding component and the second folding component through the connecting component, the first folding component and the second folding component can realize the bidirectional automatic centering function. Furthermore, the connecting component is equipped with a single torsion spring as a power source, which has a simple structure, high connection strength and adjustable force. At the same time, the connecting component is more flexible than the rotating shaft, which can avoid the problem of jamming after long-term use and improve the service life.
[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description, claims, and drawings.
[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0021] Figure 1 An external structural diagram of a folding device provided in an embodiment of this disclosure;
[0022] Figure 2 An internal structural diagram of a folding device provided in an embodiment of this disclosure;
[0023] Figure 3 A structural diagram of a first folding assembly provided in an embodiment of this disclosure;
[0024] Figure 4 A structural diagram of a second folding assembly provided in an embodiment of this disclosure;
[0025] Figure 5 A structural diagram of a connection component provided in an embodiment of this disclosure;
[0026] Figure 6 A left-side view of a folding device provided in an embodiment of this disclosure;
[0027] Figure 7 This is a right-side view of a folding device provided in an embodiment of the present disclosure.
[0028] In the picture:
[0029] 1. First folding component; 11. First page; 12. First retaining sleeve; 13. First step;
[0030] 2. Second folding assembly; 21. Second sheet; 22. Second retaining sleeve; 23. Second step;
[0031] 3. Connecting assembly; 31. Reset unit; 311. Torsion spring; 32. First connecting unit; 321. First connecting shaft; 322. First limiting member; 33. Second connecting unit; 331. Second connecting shaft; 332. Second limiting member;
[0032] 4. End caps. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0034] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.
[0035] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.
[0036] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.
[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0038] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0039] like Figures 1 to 7 As shown, at least one embodiment provides a folding device, which includes: a first folding component 1, a second folding component 2, and a connecting component 3; wherein the connecting component 3 passes through the first folding component 1 and the second folding component 2, and the first folding component 1 and the second folding component 2 are respectively movably and limitingly connected to the connecting component 3; the first folding component 1 is adapted to flip relative to the second folding component 2, and / or the second folding component 2 is adapted to flip relative to the first folding component 1; and the connecting component 3 is adapted to push the first folding component 1 and / or the second folding component 2 to a reset.
[0040] In at least one embodiment, the first folding component 1 and the second folding component 2 are elastically connected by the connecting component 3, which enables the first folding component 1 and the second folding component 2 to automatically return to center in both directions. The connecting component 3 is equipped with a single torsion spring 311 as a power source, which has a simple structure, high connection strength and adjustable force. At the same time, the connecting component 3 is more flexible than the rotating shaft, which can avoid the problem of jamming after long-term use and improve the service life.
[0041] In at least one embodiment, please refer to Figure 3 The first folding assembly 1 includes: a first leaf piece 11 and a first limiting sleeve 12; the outer wall of the first limiting sleeve 12 is connected to the first leaf piece 11, and the connecting assembly 3 passes through the first limiting sleeve 12; the inner wall of the first limiting sleeve 12 is axially provided with two first steps 13, and the two first steps 13 are symmetrical about the central axis of the first limiting sleeve 12, so that the two first steps 13 can move and limit the connecting assembly 3; the first leaf piece 11 is adapted to drive the first limiting sleeve 12 to rotate, so that the two first steps 13 can twist the connecting assembly 3; the connecting assembly 3 is adapted to push the two first steps 13, thereby pushing the first limiting sleeve 12 and the first leaf piece 11 to reset.
[0042] Specifically, the function of the first page 11 is to connect the object and the first limiting sleeve 12.
[0043] Specifically, the first limiting sleeve 12 forms an elastic fiber relationship with the connecting component 3 through two first steps 13. That is, after the first limiting sleeve 12 is pushed, it flips relative to the second folding component 2 by abutting against the connecting component 3 through the corresponding first steps 13. After the first limiting sleeve 12 is removed from the push, the connecting component 3 can push the first steps 13 to reset it.
[0044] In at least one embodiment, please refer to Figure 4 The second folding assembly 2 includes: a second leaf 21 and two second limiting sleeves 22; the outer walls of the two second limiting sleeves 22 are connected to the second leaf 21, the two second limiting sleeves 22 are respectively located on both sides of the first limiting sleeve 12, and the two second limiting sleeves 22 and the first limiting sleeve 12 are coaxially arranged so that the connecting assembly 3 passes through the two second limiting sleeves 22; the inner wall of any second limiting sleeve 22 is axially provided with two second steps 23, and the two second steps 23 are symmetrical about the central axis of the second limiting sleeve 22 so that the two second steps 23 can move and limit the connecting assembly 3; the second leaf 21 is adapted to drive each second limiting sleeve 22 to rotate so that each second step 23 can twist the connecting assembly 3; the connecting assembly 3 is adapted to push each second step 23, thereby pushing the two second limiting sleeves 22 and the second leaf 21 to reset.
[0045] Specifically, the function of the second page 21 is to connect the object and the second limiting sleeve 22.
[0046] Specifically, the second limiting sleeve 22 forms an elastic fiber relationship with the connecting component 3 through each second step 23. That is, after the second limiting sleeve 22 is pushed, it flips relative to the first folding component 1 by abutting against the connecting component 3 through the corresponding second step 23. After the second limiting sleeve 22 is removed from the push, the connecting component 3 can push the second step 23 to reset it.
[0047] In at least one embodiment, one first step 13 is aligned with two of the second steps 23, and another first step 13 is aligned with the remaining two second steps 23, so as to facilitate relative rotation between the first sheet 11 and the second sheet 21.
[0048] In at least one embodiment, please refer to Figure 5 The connecting component 3 includes: a reset unit 31, a first connecting unit 32, and a second connecting unit 33; the first connecting unit 32 and the second connecting unit 33 are movably connected to the reset unit 31, and the first connecting unit 32 and the second connecting unit 33 are located on both sides of the reset unit 31, the reset unit 31 is located inside the first limiting sleeve 12, and the first connecting unit 32 and the second connecting unit 33 extend into the corresponding second limiting sleeve 22; the first connecting unit 32 rotates relative to the second connecting unit 33 through the reset unit 31, and / or the second connecting unit 33 is adapted to rotate relative to the first connecting unit 32 through the reset unit 31.
[0049] Specifically, when the first connecting unit 32 is blocked, the second connecting unit 33 can rotate the reset unit 31 under the action of force, so that the second connecting unit 33 can rotate relative to the first connecting unit 32.
[0050] Specifically, when the second connecting unit 33 is blocked, the first connecting unit 32 can rotate the reset unit 31 under the action of force, so that the first connecting unit 32 can rotate relative to the second connecting unit 33.
[0051] Specifically, the first connecting unit 32 and the second connecting unit 33 can also simultaneously rotate the reset unit 31 under the action of force, and the rotation direction of the first connecting unit 32 is opposite to the rotation direction of the second connecting unit 33.
[0052] In at least one embodiment, please refer to Figure 5 The reset unit 31 includes a torsion spring 311; the two sides of the torsion spring 311 are respectively connected to the first connecting unit 32 and the second connecting unit 33; the torsion spring 311 is adapted to pull the first connecting unit 32 and / or the second connecting unit 33 to reset.
[0053] Specifically, by setting only a single torsion spring 311, the bidirectional 90-degree automatic centering function of the first connecting unit 32 and the second connecting unit 33 can be realized.
[0054] In at least one embodiment, please refer to Figure 5 The first connecting unit 32 includes: a first connecting shaft 321 and two first limiting members 322; the first connecting shaft 321 is connected to a torsion spring 311, the two first limiting members 322 are axially arranged on the surface of the first connecting shaft 321, and the two first limiting members 322 are symmetrical about the central axis of the first connecting shaft 321; the first connecting shaft 321 extends from the first limiting sleeve 12 into the corresponding second limiting sleeve 22, and the first step 13, the second step 23 and the first limiting member 322 are misaligned.
[0055] Specifically, when the first step 13, the second step 23 and the first limiting member 322 form a limiting relationship, the first connecting shaft 321 can twist the torsion spring 311, that is, rotate relative to the second connecting unit 33.
[0056] In at least one embodiment, please refer to Figure 5 The second connecting unit 33 includes: a second connecting shaft 331 and two second limiting members 332; the second connecting shaft 331 is connected to a torsion spring 311, the two second limiting members 332 are axially arranged on the surface of the second connecting shaft 331, and the two second limiting members 332 are symmetrical about the central axis of the second connecting shaft 331; the second connecting shaft 331 extends from the second limiting sleeve 22 into the corresponding second limiting sleeve 22, and the first step 13, the second step 23 and the second limiting member 332 are misaligned.
[0057] Specifically, when the first step 13, the second step 23 and the second limiting member 332 form a limiting relationship, the second connecting shaft 331 can rotate the torsion spring 311, that is, rotate relative to the first connecting shaft 321.
[0058] In at least one embodiment, a first limiting member 322 on the first connecting shaft 321 and a second limiting member 332 on the second connecting shaft 331 are respectively located on both sides of one of the first steps 13; another first limiting member 322 on the first connecting shaft 321 and another second limiting member 332 on the second connecting shaft 331 are respectively located on both sides of another first step 13.
[0059] Please see Figures 6 to 7When the second page 21 is fixed, the first page 11 and the first limiting sleeve 12 rotate in direction a (the first page 11 and the first limiting sleeve 12 rotate in direction b). The first step 13 abuts against the first limiting member 322 and rotates in direction a. At the same time, the second step 23 blocks the second limiting member 332, so that the second connecting shaft 331 is limited and fixed, while the first connecting shaft 321 rotates.
[0060] Please see Figures 6 to 7 When the second page 21 is fixed, the first page 11 and the first limiting sleeve 12 rotate in direction c (the first page 11 and the first limiting sleeve 12 rotate in direction d). The second step 23 abuts against the second limiting member 332 and rotates in direction d. At the same time, the first step 13 blocks the first limiting member 322, so that the first connecting shaft 321 is limited and fixed, while the second connecting shaft 331 rotates.
[0061] In at least one embodiment, please refer to Figure 1 The folding device further includes: two end caps 4; the two end caps 4 respectively block the corresponding second limiting sleeves 22 to limit the connecting component 3.
[0062] Specifically, the end cap 4 can limit the connection component 3 to prevent it from shifting in the first folding component 1 and the second folding component 2. On the other hand, the end cap 4 can also seal the connection component 3 to prevent impurities from entering the first folding component 1 and the second folding component 2.
[0063] In summary, this utility model achieves bidirectional automatic centering of the first and second folding components by elastically connecting the first and second folding components through a connecting component. Furthermore, the connecting component is equipped with a single torsion spring as a power source, resulting in a simple structure, high connection strength, and adjustable force. At the same time, the connecting component is more flexible than the rotating shaft, which can avoid the problem of jamming after long-term use and improve service life. This folding device can be applied to hospital rail logistics projects.
[0064] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0065] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.
[0066] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.
[0067] 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.
Claims
1. A folding device, characterized in that, include: First folding component (1), second folding component (2), and connecting component (3); in The connecting component (3) passes through the first folding component (1) and the second folding component (2), and the first folding component (1) and the second folding component (2) are respectively movably and limitedly connected to the connecting component (3); The first folding component (1) is adapted to be flipped relative to the second folding component (2); The first folding component (1) includes: a first sheet (11) and a first limiting sleeve (12); The outer wall of the first limiting sleeve (12) is connected to the first leaf piece (11); The second folding component (2) includes: a second sheet (21) and two second limiting sleeves (22); The outer walls of the two second limiting sleeves (22) are connected to the second leaf piece (21). The two second limiting sleeves (22) are located on both sides of the first limiting sleeve (12), and the two second limiting sleeves (22) and the first limiting sleeve (12) are coaxially arranged. The connection component (3) includes: a reset unit (31), a first connection unit (32), and a second connection unit (33); The first connecting unit (32) and the second connecting unit (33) are movably connected to the reset unit (31). The first connecting unit (32) and the second connecting unit (33) are located on both sides of the reset unit (31). The reset unit (31) is located inside the first limiting sleeve (12). The first connecting unit (32) and the second connecting unit (33) extend into the corresponding second limiting sleeve (22). The first connecting unit (32) rotates relative to the second connecting unit (33) via the reset unit (31), and / or the second connecting unit (33) is adapted to rotate relative to the first connecting unit (32) via the reset unit (31), that is, to push the first folding assembly (1) and / or the second folding assembly (2) to reset.
2. The folding device as claimed in claim 1, characterized in that, The inner sidewall of the first limiting sleeve (12) is axially provided with two first steps (13), and the two first steps (13) are symmetrical about the central axis of the first limiting sleeve (12) so that the two first steps (13) can limit the movement of the connecting component (3); The first leaf (11) is adapted to drive the first limiting sleeve (12) to rotate so that the two first steps (13) twist to connect the assembly (3). The connecting component (3) is adapted to push the two first steps (13), thereby pushing the first limiting sleeve (12) and the first leaf piece (11) to reset.
3. The folding device as described in claim 2, characterized in that, Two second steps (23) are axially provided on the inner sidewall of any of the second limiting sleeves (22), and the two second steps (23) are symmetrical about the central axis of the second limiting sleeves (22) so that the two second steps (23) can limit the movement of the connecting component (3); The second leaf (21) is adapted to drive each second limiting sleeve (22) to rotate, so that each second step (23) twists the connecting assembly (3); The connecting component (3) is adapted to push each of the second steps (23), thereby pushing the two second limiting sleeves (22) and the second leaf (21) to reset.
4. The folding device as described in claim 3, characterized in that, One of the first steps (13) is aligned with two of the second steps (23), and another of the first steps (13) is aligned with the other two second steps (23).
5. The folding device as described in claim 4, characterized in that, The reset unit (31) includes: a torsion spring (311); The two sides of the torsion spring (311) are respectively connected to the first connecting unit (32) and the second connecting unit (33); The torsion spring (311) is adapted to pull the first connecting unit (32) and / or the second connecting unit (33) to reset.
6. The folding device as described in claim 5, characterized in that, The first connecting unit (32) includes: a first connecting shaft (321) and two first limiting members (322); The first connecting shaft (321) is connected to the torsion spring (311), and the two first limiting members (322) are axially arranged on the surface of the first connecting shaft (321), and the two first limiting members (322) are symmetrical about the central axis of the first connecting shaft (321); The first connecting shaft (321) extends from the first limiting sleeve (12) into the corresponding second limiting sleeve (22), and the first step (13), the second step (23) and the first limiting member (322) are misaligned.
7. The folding device as claimed in claim 6, characterized in that, The second connecting unit (33) includes: a second connecting shaft (331) and two second limiting members (332); The second connecting shaft (331) is connected to the torsion spring (311), and the two second limiting members (332) are axially arranged on the surface of the second connecting shaft (331), and the two second limiting members (332) are symmetrical about the central axis of the second connecting shaft (331); The second connecting shaft (331) extends from the second limiting sleeve (22) into the corresponding second limiting sleeve (22), and the first step (13), the second step (23) and the second limiting member (332) are misaligned.
8. The folding device as claimed in claim 7, characterized in that, A first limiting member (322) on the first connecting shaft (321) and a second limiting member (332) on the second connecting shaft (331) are respectively located on both sides of one of the first steps (13); Another first limiting member (322) on the first connecting shaft (321) and another second limiting member (332) on the second connecting shaft (331) are located on both sides of another first step (13).
9. The folding device as claimed in claim 1, characterized in that, Also includes: End caps (4); The two end caps (4) respectively block the corresponding second limiting sleeves (22) to limit the connection component (3).