Rotary folding structure, foldable chair, storage box support and table

Abstract

A rotary collapsing structure, a folding chair, a storage box rack, and a table are specifically provided, and relates to the field of collapsing structures. The collapsing structure includes a first frame component, a second frame component, and a locking assembly mounted on the first frame component or the second frame component. The first frame component includes a first rotating disk and a first rotating arm. The second frame component includes a second rotating disk and a second rotating arm. The first rotating disk is rotatably connected to the second rotating disk. The locking assembly includes a triggering member and a locking member. The triggering member is mounted on the first rotating arm or the second rotating arm. The locking member is suitable for limiting rotation angles of the first rotating disk and the second rotating disk.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of collapsing structures, and in particular, to a rotary collapsing structure, a folding chair, a storage box rack, and a table.BACKGROUND

[0002] A folding chair generally includes two mutually hinged frame components. A front leg, a rear leg, a front seat rod, and a back rod can be plugged onto the frame components. The front leg and the front seat rod are connected by an elastic tension cable, while the rear leg and the back rod are also connected by an elastic tension cable.

[0003] To facilitate collapsing of the folding chair, the two frame components can be unfolded and folded relative to each other. Each frame component typically includes a rotating disk and a rotating arm. The rotating disks of the two frame components are connected rotatably. Based on an understanding of the related art, collapsing locking members of some folding chairs are generally mounted on the rotating disks. To collapse a folding chair, a user needs to press the locking member on a rotating disk with one hand, to unlock the rotating arm, and rotates the unlocked rotating arm with the other hand, to achieve the purpose of collapsing the folding chair. This manner makes the collapsing operation on the folding chair less convenient, because in this manner, the pressure is applied to only one rotating arm and the other rotating arm is unstressed. When the two rotating arms are collapsed relative to each other, there is a problem of non-uniform stress. As a result, it is not smooth during the collapsing of the folding chair.

[0004] Similarly, a storage box rack, a table, and related components that have folding structures also have the above technical problems during collapsing.SUMMARY

[0005] At least one specific implementation of the present disclosure aims to provide a rotary collapsing structure and a folding chair, to solve the shortcomings in the existing art.

[0006] In order to achieve the above objectives, the present disclosure adopts the following technical solutions:

[0007] A rotary collapsing structure includes: a first rotating member and the second rotating member which are rotatably connected to each other through a rotating shaft; a first constraint portion arranged on the first rotating member; a second constraint portion arranged on the second rotating member; and an elastically reset locking body.

[0008] In an unfolded state, the first constraint portion and the second constraint portion are spatially coaxial with each other to form a circumferentially closed constraint hole; and the locking body is driven by an elastic force to be embedded into the constraint hole and forms circumferential interference with an inner wall of the constraint hole to prevent relative rotation between the first rotating member and the second rotating member.

[0009] In a collapsed state, the locking body is detached from the constraint hole; and the first rotating member and the second rotating member rotate relative to each other around the rotating shaft; and under the elastic force, the locking body abuts against an outer circumferential surface of the first rotating member or the second rotating member.

[0010] Further, an embedding movement direction of the locking body is perpendicular to an axial direction of the rotating shaft.

[0011] Further, in the collapsed state, the elastic force always imparts the locking body with a tendency of movement in a radial direction of the rotating shaft.

[0012] Further, in the collapsed state, the first constraint portion and the second constraint portion are staggered; and during switching from the collapsed state to the unfolded state, the locking body is continuously crimped to the outer circumferential surface of the first rotating member or the second rotating member by the elastic force.

[0013] When the first rotating member and the second rotating member rotate relative to each other to a predetermined angle, spatial positions of the first constraint portion and the second constraint portion are aligned, to automatically form the circumferentially closed constraint hole; and the locking body is driven by the elastic force to be embedded into the constraint hole and forms the circumferential interference with the inner wall of the constraint hole, to complete rotary locking.

[0014] Further, in the unfolded state, the first constraint portion and the second constraint portion are spatially coaxial; during switching from the unfolded state to the collapsed state, a radial external unlocking force is applied to the locking body, to counteract the elastic force and detach the locking body from the constraint hole.

[0015] The first rotating member and the second rotating member obtain a degree of freedom of relative rotation around the rotating shaft; and in a relative rotation process, the first constraint portion and the second constraint portion are spatially staggered, causing the external unlocking force on the constraint hole to disappear.

[0016] After the external unlocking force is removed, the locking body is driven by the elastic force to abut against the outer circumferential surface of the first rotating member or the second rotating member, to maintain a non-interference state.

[0017] The present disclosure provides another rotary collapsing structure, including: a first rotating disk including a first rotating contact surface and a first limiting slot formed in the first rotating contact surface; a second rotating disk including a second rotating contact surface opposite to the first rotating contact surface and a second limiting slot formed in the second rotating contact surface; a pin shaft connecting the first rotating disk with the second rotating disk to implement relative rotation between the first rotating disk and the second rotating disk; and a locking assembly including a locking pin, an elastic member, and a locking limiting portion arranged at an end portion of the locking pin.

[0018] The first rotating disk and the second rotating disk have first positions and second positions that are opposite to each other.

[0019] In the first positions, the first limiting slot and the second limiting slot are spatially coaxial to form a circumferentially closed limiting hole, and under action of an elastic force of the elastic member, the locking limiting portion extends into the limiting hole and forms circumferential interference with an inner wall of the limiting hole to prevent relative rotation of the rotating disks.

[0020] In the second positions, the locking limiting portion is detached from the limiting hole, the first rotating contact surface and the second rotating contact surface rotate relative to each other around the pin shaft, and when reset, the locking limiting portion abuts against an outer circumferential surface of the first rotating disk or the second rotating disk.

[0021] Further, the first rotating disk is fixedly connected to the first rotating arm; the second rotating disk is fixedly connected to the second rotating arm; and the first positions and the second positions are determined based on a relative position between the first rotating arm and the second rotating arm.

[0022] Further, after the locking limiting portion is detached from the limiting hole, an end portion of the locking limiting portion continuously abuts against the outer circumferential surface of the first rotating disk or the second rotating disk under the action of the elastic force of the elastic member.

[0023] Further, the locking pin and the elastic member of the locking assembly are mounted in an inner cavity of the first rotating arm; the locking pin is suitable for being actuated by a triggering member that is movably mounted on an outer side of the first rotating arm; or, the locking pin and the elastic member of the locking assembly are mounted in an inner cavity of the second rotating arm; and the locking pin is suitable for being actuated by a triggering member that is movably mounted on an outer side of the second rotating arm.

[0024] Further, the triggering member is located in an end-portion holding region of the first rotating arm or the second rotating arm.

[0025] The triggering member is configured to be triggered when a user holds the end-portion holding region to rotate the first rotating arm or the second rotating arm.

[0026] Further, the triggering member is a sliding sleeve.

[0027] The sliding sleeve sleeves the first rotating arm or the second rotating arm, and is connected to the locking pin through a linkage pin.

[0028] Further, the triggering member is a trigger.

[0029] One end of the trigger is hinged to the first rotating arm or the second rotating arm through a rotating pin, and another end extends from the inner cavity of the first rotating arm or the second rotating arm and is connected to the locking pin through a connecting piece.

[0030] Compared with the existing art, the collapsing structure provided by the present disclosure have the following beneficial technical effects: The locking assembly of the rotary collapsing structure includes a triggering member and a locking member. The triggering member is mounted in the end-portion holding region of the first rotating arm or the second rotating arm. When the collapsing structure switches from the unfolded state to the collapsed state, a user holds the holding regions at one end of the first rotating arm and one end of the second rotating arm respectively with the hands. After the triggering member is triggered with a hand, the triggering member is linked to the locking member, and a locking action of the locking member on the first rotating disk and the second rotating disk is deactivated. The user rotates the first rotating arm and the second rotating arm with the hands and make them approach each other until the first rotating arm and the second rotating arm are in contact with each other. In both the unfolding process and the collapsing process of the entire collapsing structure, the hands of the user hold the end-portion holding regions of the first rotating arm and the second rotating arm. Throughout the entire operation process, an end portion of each of the first rotating arm and the second rotating arm is held by a single hand of the user, so that both the first rotating arm and the second rotating arm can be stressed, and the problem of non-uniform stress or non-smooth collapsing is avoided.

[0031] Another technical solution of the present disclosure is as follows: A folding chair is provided, including: the above rotary collapsing structure; front legs, rear legs, two front seat rods, and two back rods that are respectively plugged into the first rotating arm and the second rotating arm; a first tension cable, where one end of the first tension cable extends into the front legs and is connected to the front legs, and another end of the first tension cable extends into the front seat rods and is connected to the front seat rods; a second tension cable, where one end of the second tension cable extends into the rear legs and is connected to the rear legs, and another end of the second tension cable extends into the back rods and is connected to the back rods; and a chair seat, where four corners of the chair seat are respectively supported by the two front seat rods and the two back rods.

[0032] Through the above technical solution, after the folding chair uses the above rotary collapsing structure, during collapsing and unfolding of the entire folding chair, an end portion of each of the first rotating arm and the second rotating arm is held in a single hand of a user, so that the stress is uniform, and the collapsing is smooth.

[0033] Still another technical solution of the present disclosure provides a storage box rack, including: the above rotary collapsing structure; supporting legs respectively plugged onto the first rotating arm and the second rotating arm; and supporting blocks arranged on surfaces of the first rotating arm and the second rotating arm.

[0034] The supporting blocks are suitable for placing a storage box. Surfaces of the supporting blocks are friction surfaces. When the storage box is placed, an anti-slip effect can be achieved.

[0035] Through the above technical solution, during use, the storage box rack can be collapsed and unfolded. During collapsing and unfolding, an end portion of each of the first rotating arm and the second rotating arm is held in a single hand of a user, so that the stress is uniform, and the collapsing is smooth.

[0036] Still another technical solution of the present disclosure provides a table, including: the above rotary collapsing structure; a lower supporting leg and an upper supporting rod that are respectively plugged onto the first rotating arm and the second rotating arm; a supporting assembly connected to the upper supporting rod; and a table board unit placed above the supporting assembly.

[0037] Further, the supporting assembly includes: a plug suitable for being plugged to an end portion of the upper supporting rod; a lower buckle plate mounted on the plug; and a table board supporting rod in buckling connection with the lower buckle plate.

[0038] Further, an upper buckle plate is arranged at a bottom of the table board unit; the table board supporting rod supports the bottom of the table board unit; and the upper buckle plate and the lower buckle plate are respectively in buckling connection with the table board supporting rod.

[0039] Through the above technical solution, the table is composed of the detachable table board unit, the supporting assembly, the collapsing structure, the lower supporting leg, and the upper supporting rod. The collapsing structure forms a main supporting frame of the table. During collapsing and unfolding of the collapsing structure, an end portion of each of the first rotating arm and the second rotating arm is held in a single hand of a user, so that the stress is uniform, and the collapsing is smooth.BRIEF DESCRIPTION OF THE DRAWINGS

[0040] To describe the technical solutions in the embodiments of the present invention or in the existing technology more clearly, the following will briefly introduce the accompanying drawings required to describe the specific implementations or the existing technology. Apparently, the accompanying drawings in the following description show merely some implementations of the present invention, and a person of ordinary skill in the art may still derive other drawings from the accompanying drawings without creative efforts. FIG. 1 is a schematic diagram of a collapsing structure in an unfolded state in Embodiment 1 of the present disclosure; FIG. 2 is a schematic diagram of a collapsing structure in a collapsed state in Embodiment 1 of the present disclosure; FIG. 3 is an exploded view of FIG. 1; FIG. 4 is a top view of FIG. 1; FIG. 5 is a cross-sectional view along line A-A in FIG. 4; FIG. 6 is an exploded view of FIG. 2; FIG. 7 is an exploded view of FIG. 2 in another angle; FIG. 8 is a partially cross-sectional view after a collapsing structure is collapsed; FIG. 9 is a diagram of showing a stress when a collapsing structure is collapsed according to the present disclosure; FIG. 10 is a schematic diagram of a collapsing structure in an unfolded state in Embodiment 2 of the present disclosure; FIG. 11 is a schematic diagram of a collapsing structure in a collapsed state in Embodiment 2 of the present disclosure; FIG. 12 is a schematic structural diagram of FIG. 10 in another angle; FIG. 13 is an exploded view of FIG. 10; FIG. 14 is a top view of FIG. 10; FIG. 15 is a cross-sectional view along line B-B in FIG. 14; FIG. 16 is an exploded view of FIG. 11; FIG. 17 is an exploded view of FIG. 11 in another angle; FIG. 18 is a partially cross-sectional view after a collapsing structure is collapsed in Embodiment 2 of the present disclosure; FIG. 19 is a diagram of showing a stress when a collapsing structure is collapsed in Embodiment 2 of the present disclosure; FIG. 20 is a schematic structural diagram of a folding chair in Embodiment 3 of the present disclosure; FIG. 21 is a schematic structural diagram of a framework of a folding chair in Embodiment 3 of the present disclosure; FIG. 22 is a schematic structural diagram of a folding chair in Embodiment 3 of the present disclosure after a framework is collapsed; FIG. 23 is a schematic structural diagram of a framework being folded and stored, of a folding chair in Embodiment 3 of the present disclosure; FIG. 24 is a schematic diagram of an easily unfolded structure in Embodiment 3 of the present disclosure; FIG. 25 is a schematic diagram of assembling of an easily unfolded structure in Embodiment 3 of the present disclosure; FIG. 26 is a schematic structural diagram of a supporting rod being pulled out, of an easily unfolded structure in Embodiment 3 of the present disclosure; FIG. 27 is a schematic structural diagram of a supporting rod being folded, of an easily unfolded structure in Embodiment 3 of the present disclosure; FIG. 28 is a schematic structural diagram of a framework of a folding chair in Embodiment 4 of the present disclosure; FIG. 29 is a schematic structural diagram of a folding chair in Embodiment 4 of the present disclosure after a framework is collapsed; FIG. 30 is a schematic diagram of an easily unfolded structure in Embodiment 4 of the present disclosure; FIG. 31 is a schematic structural diagram of a frame component in Embodiment 4 of the present disclosure; FIG. 32 is a schematic diagram of an easily unfolded structure when a supporting rod is pulled out in Embodiment 4 of the present disclosure; FIG. 33 is a schematic diagram of an easily unfolded structure when a supporting rod is folded in Embodiment 4 of the present disclosure; FIG. 34 is a cross-sectional view of an easily unfolded structure in Embodiment 4 of the present disclosure; FIG. 35 is a schematic structural diagram of Embodiment 5 of the present disclosure; FIG. 36 is diagram of a usage effect of Embodiment 5 of the present disclosure; FIG. 37 is a schematic structural diagram of Embodiment 6 of the present disclosure; FIG. 38 is diagram of a usage effect of Embodiment 6 of the present disclosure; FIG. 39 is a schematic structural diagram of Embodiment 7 of the present disclosure; FIG. 40 is a schematic structural diagram of Embodiment 7 of the present disclosure in another angle; FIG. 41 is a schematic structural diagram of an unfolded state in Embodiment 8 of the present disclosure; FIG. 42 is a schematic structural diagram of slippage of a unit beam relative to a linkage member in Embodiment 8 of the present disclosure; FIG. 43 is a schematic structural diagram of a unit beam that rotatably approaches in Embodiment 8 of the present disclosure; FIG. 44 is a schematic structural diagram after rotary collapsing in Embodiment 8 of the present disclosure; FIG. 45 is a schematic structural diagram of flipping and folding after rotary collapsing in Embodiment 8 of the present disclosure; FIG. 46 is a schematic structural diagram of a bundled folded state in Embodiment 8 of the present disclosure; FIG. 47 is a schematic structural diagram of a rotating member and a limiting end in Embodiment 8 of the present disclosure; FIG. 48 is a schematic structural diagram of a table in Embodiment 8 of the present disclosure; FIG. 49 is a schematic diagram of assembling of a table in Embodiment 8 of the present disclosure; and FIG. 50 is a schematic structural diagram of a folded table board in Embodiment 8 of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The following clearly and completely describes the technical solutions of the present disclosure with reference to the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present disclosure rather than all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the disclosed embodiments without creative efforts shall fall within the protection scope of the present disclosure.Embodiment 1

[0042] Referring to FIG. 1, FIG. 2, and FIG. 3, a rotary collapsing structure 100 includes a first frame component (or first rotating assembly) 10, a second frame component (or second rotating assembly) 20 rotatably connected to the first frame component 10, and a locking assembly 30 mounted on the first frame component 10 or the second frame component 20.

[0043] The first frame component 10 includes a first rotating disk (or first rotating member) 101, a first rotating arm 102 fixedly connected to the first rotating disk 101, and a first connecting arm 102a arranged at an end portion of the first rotating arm 102.

[0044] The second frame component 20 includes a second rotating disk 201, a second rotating arm 202 fixedly connected to the second rotating disk (or second rotating member) 201, and a second connecting arm 202a arranged at an end portion of the second rotating arm 202.

[0045] The first rotating disk 101 and the second rotating disk 201 are rotatably connected to each other through a rotating shaft, such as a pin shaft 40.

[0046] Further, the locking assembly 30 includes a locking pin 301 movably arranged in an inner cavity of the first rotating arm 102 or the second rotating arm 202; a fixing pin 302 that is fixedly connected to the first rotating arm 102 or the second rotating arm 202 and penetrates through the locking pin 301; a spring 303 that is sleeved on an outer side of the locking pin 301, where one end of the spring is connected to the fixing pin 302 and another end of the spring resists against the locking pin 301; a linkage pin 304 penetrating through the locking pin 301; and a sliding sleeve 305 that is sleeved on the first rotating arm 102 or the second rotating arm 202 and is fixedly connected to the linkage pin 304.

[0047] The sliding sleeve 305 is constructed as a triggering member which is mounted on the first rotating arm 102 or the second rotating arm 202. The locking pin 301 is constructed as a locking member. Under normal circumstances, the locking member is configured to limit rotation angles of the first rotating disk 101 and the second rotating disk 201.

[0048] After the triggering member is triggered, the locking member can be linked through the linkage pin 304 to deactivate the limitation imposed by the locking member on the first rotating disk 101 and the second rotating disk 201.

[0049] The locking pin 301 is provided with a locking limiting portion 306 which is close to the first rotating disk 101 and the second rotating disk 201 and can limit the rotation angles of the first rotating disk 101 and the second rotating disk 201.

[0050] Further, the locking pin 301 is provided with a guide slot 307. The fixing pin 302 penetrates through the guide slot 307. The first rotating arm 102 or the second rotating arm 202 is provided with a sliding chute 308. The linkage pin 304 is in sliding fit with the sliding chute 308. The guide slot 307 extends in a length direction of the locking pin 301. The sliding chute 308 extends in a length direction of the first rotating arm 102 or the second rotating arm 202.

[0051] Further, referring to FIG. 4 to FIG. 8, the first rotating disk 101 is provided with a first rotating contact surface 103, and the second rotating disk 201 is provided with a second rotating contact surface 203. The first rotating contact surface 103 and the second rotating contact surface 203 are opposite to each other. After the first rotating disk 101 and the second rotating disk 201 are rotatably connected through the pin shaft 40, the first rotating contact surface 103 and the second rotating contact surface 203 can rotate relative to each other around the pin shaft 40. The first rotating contact surface 103 is provided with a first limiting slot 104, i.e. a first constraint portion, corresponding to the locking limiting portion 306, and the second rotating contact surface 203 is provided with a second limiting slot 204, i.e. a second constraint portion, corresponding to the locking limiting portion 306. The first rotating disk 101 and the second rotating disk 201 has first positions and second positions that are opposite to each other. In the first positions, the first limiting sot 104 and the second limiting slot 204 are spatially coaxial to form a circumferentially closed limiting hole (or a constraint hole) 50. The locking limiting portion 306 extends into the limiting hole 50 under action of an elastic force of an elastic member (the spring 303) and forms circumferential interference with an inner wall of the limiting hole 50, to prevent relative rotation between the first rotating disk 101 and the second rotating disk 201 (as shown in FIG. 5).

[0052] In the second positions, the locking limiting portion 306 is detached from the limiting hole 50. The first rotating contact surface 103 and the second rotating contact surface 203 can rotate relative to each other around the pin shaft 40. When reset, the locking limiting portion 306 abuts against an outer circumferential surface of the first rotating disk 101 or the second rotating disk 201 (as shown in FIG. 8).

[0053] Specifically, when the first rotating arm 102 and the second rotating arm 202 are unfolded relative to each other, the first rotating disk 101 and the second rotating disk 201 are in the opposite first positions. The first limiting slot 104 and the second limiting slot 204 overlap to form the limiting hole 50, that is, an upper half slot and a lower half slot are aligned and matched to jointly enclose the limiting hole 50. It can be seen that the limiting hole 50 is enclosed jointly by a side wall of the first limiting slot 104 and a side wall of the second limiting slot 204. In this case, the first limiting slot 104 and the second limiting slot 204 are spatially coaxial with each other, and their central axes are collinear. Under the action of the elastic force of the spring 303, the locking limiting portion 306 of the locking pin 301 extends into the limiting hole 50 and forms the circumferential interference with the inner wall of the limiting hole 50, so that the first rotating contact surface 103 and the second rotating contact surface 203 cannot rotate relative to each other. A shape of the limiting hole 50 matches a shape of the locking limiting portion 306, and a diameter of the locking limiting portion 306 is less than an aperture of the limiting hole 50.

[0054] When the first rotating arm 102 and the second rotating arm 202 need to be retracted, the locking limiting portion 306 is pulled out from the limiting hole 50, and the first rotating contact surface 103 and the second rotating contact surface 203 rotate relative to each other around the pin shaft 40. The first limiting slot 104 and the second limiting slot 204 are staggered from each other. After the first rotating arm 102 and the second rotating arm 202 are collapsed relative to each other, the first rotating disk 101 and the second rotating disk 201 are in the opposite second positions. When the locking limiting portion 306 is reset under the action of the elastic force of the spring 303, an end portion of the locking limiting portion 306 resists against the outer circumferential surface of the first rotating disk 101 or the second rotating disk 201.

[0055] Further, when the locking assembly 30 is mounted on the first frame component 10, the locking pin 301 and the spring 303 are mounted in the inner cavity of the first rotating arm 102, and the sliding sleeve 305 sleeves the first rotating arm 102. After the first rotating arm 102 and the second rotating arm 202 are collapsed relative to each other, the first limiting slot 104 and the second limiting slot 204 are staggered from each other, and the locking limiting portion 306 resists against the outer circumferential surface of the second rotating disk 201 under the action of the elastic force of the spring 303.

[0056] When the locking assembly 30 is mounted on the second frame component 20, the locking pin 301 and the spring 303 are mounted in the inner cavity of the second rotating arm 202, and the sliding sleeve 305 sleeves the second rotating arm 102. After the first rotating arm 102 and the second rotating arm 202 are collapsed relative to each other, the first limiting slot 104 and the second limiting slot 204 are staggered from each other (as shown in FIG. 6), and the locking limiting portion 306 resists against the outer circumferential surface of the first rotating disk 101 under the action of the elastic force of the spring 303 (as shown in FIG. 8).

[0057] The following makes a detailed description to this embodiment in conjunction with a specific state and a collapsing process of the collapsing structure 100.

[0058] Referring to FIG. 9, in this embodiment, a triggering member (the sliding sleeve 305) is mounted in an end-portion holding region 60 of the first rotating arm 102 or the second rotating arm 202. Specifically, an example in which the triggering member (the sliding sleeve 305) is mounted in the end-portion holding region 60 of the second rotating arm 202 is used.

[0059] Specifically, the triggering member (the sliding sleeve 305) and a locking body (the locking pin 301) are arranged on an outer side of the same rotating arm (such as the second rotating arm 202) and are located in the end-portion holding region of the second rotating arm 202, thus forming a portion of a holding operating portion W, so that an outer surface of the triggering member (the sliding sleeve 305) at least partially forms a holding contact surface of the holding operating portion W.

[0060] When a user holds the holding operating portion W to rotate the first rotating arm 102 and the second rotating arm 202, the user can synchronously perform a triggering operation on the triggering member (the sliding sleeve 305) in an action of holding the second rotating arm 202 with a single hand, to drive the locking body (the locking pin 301) to deactivate the locking on the first rotating disk 101 and the second rotating disk 201.

[0061] When the collapsing structure 100 is in an unfolded state, the locking member (the locking pin 301) locks the first rotating disk 101 and the second rotating disk 201. When the collapsing structure 100 is in a collapsed state, a locking action performed by the locking member (the locking pin 301) on the first rotating disk 101 and the second rotating disk 201 is deactivated.

[0062] When the collapsing structure 100 switches from the unfolded state to the collapsed state, the holding regions 60 at one end of the first rotating arm 102 and one end of the second rotating arm 202 are respectively held in the hands of a user. After the triggering member (the sliding sleeve 305) is pulled back with the hand, the triggering member (the sliding sleeve 305) is linked to the locking member (the locking pin 301) through the linkage pin 304. The locking pin 301 slides relative to the fixing pin 302 through the guide slot 307. In this case, the locking limiting portion 306 is pulled out from the limiting hole 50, and the spring 303 is in a compressed state. The locking action performed by the locking member on the first rotating disk 101 and the second rotating disk 201 is deactivated, and the first rotating disk 101 and the second rotating disk 201 can rotate relative to each other around the pin shaft 40. The first rotating arm 102 and the second rotating arm 202 are rotated with the hands to approach each other until the first rotating arm 102 and the second rotating arm 202 are in contact with each other. During both the unfolding and collapsing of the entire collapsing structure 100, the user holds the end-portion holding regions 60 of the first rotating arm 102 and the second rotating arm 202 respectively with the hands. Throughout the entire operation process, the end portions of the first rotating arm 102 and the second rotating arm 202 are respectively held in the hands of the user, so that both the first rotating arm 102 and the second rotating arm 202 can be stressed, without the problem of non-uniform stress or non-smooth collapsing.

[0063] When the collapsing structure 100 is in the collapsed state, the first limiting slot 104 and the second limiting slot 204 are staggered from each other, and the limiting hole 50 is not formed at this time. When the locking limiting portion 306 is reset under the action of the elastic force of the spring 303, the locking limiting portion 306 cannot find the limiting hole 50, and its end portion can resist against the outer circumferential surface of the first rotating disk 101 or the second rotating disk 201. In a specific design, if the locking pin 301 is arranged in the first rotating arm 102, when the collapsing structure 100 is in the collapsed state, the end portion of the locking limiting portion 306 can resist against the outer circumferential surface of the second rotating disk 201. If the locking pin 301 is arranged in the second rotating arm 202, when the collapsing structure 100 is in the collapsed state, the end portion of the locking limiting portion 306 can resist against the outer circumferential surface of the first rotating disk 101.

[0064] When the collapsing structure 100 switches from the collapsed state to the unfolded state, the holding regions 60 at one end of the first rotating arm 102 and one end of the second rotating arm 202 are respectively held in the hands of the user, and the user pulls away the end portions of the first rotating arm 102 and the second rotating arm 202 towards two sides. In this case, the first rotating disk 101 and the second rotating disk 201 can rotate relative to each other around the pin shaft 40 until the first limiting slot 104 and the second limiting slot 204 overlap, that is, an upper half slot and a lower half slot are aligned and matched to jointly enclose the limiting hole 50. It can be seen that the limiting hole 50 is enclosed jointly by a side wall of the first limiting slot 104 and a side wall of the second limiting slot 204. In this case, the first limiting slot 104 and the second limiting slot 204 are spatially coaxial with each other, and their central axes are collinear. Under the action of the elastic force of the spring 303, the locking limiting portion 306 of the locking pin 301 automatically extends into the limiting hole 50 and forms the circumferential interference with the inner wall of the limiting hole 50, so that the first rotating contact surface 103 and the second rotating contact surface 203 cannot rotate relative to each other. The collapsing structure 100 can achieve an effect of locking after unfolding.Embodiment 2

[0065] Referring to FIG. 10 to FIG. 13, a difference between this embodiment of Embodiment 1 is as follows: In this embodiment, a structure of a locking assembly 40a is different from the structure of the locking assembly in Embodiment 1. In this embodiment, the locking assembly 40a includes a locking pin 401 movably arranged in an inner cavity of the first rotating arm 102 or the second rotating arm 202; a fixing pin 402 that is fixedly connected to the first rotating arm 102 or the second rotating arm 202 and penetrates through the locking pin 401; a spring 403 that is sleeved on an outer side of the locking pin 401, where one end of the spring is connected to the fixing pin 402 and another end of the spring resists against the locking pin 401; a trigger 405 hinged to the first rotating arm 102 or the second rotating arm 202 through a rotating pin 404; and a connecting buckle 406 for connecting the trigger 405 with the locking pin 401.

[0066] One end of the trigger 405 is hinged to the first rotating arm 102 or the second rotating arm 202 to form a hinged end 4051, and another end of the trigger 405 extends from the inner cavity of the first rotating arm 102 or the second rotating arm 202 to form a pressed end 4052. One end of the connecting buckle 406 is connected to a middle portion of the trigger 405, and another end of the connecting buckle 406 is connected to an end portion of the locking pin 401.

[0067] The trigger 405 is constructed as a triggering member which is mounted on the first rotating arm 102 or the second rotating arm 202. The locking pin 401 is constructed as a locking member. the connecting buckle 406 is configured as a connecting piece. Under normal circumstances, the locking member is configured to limit rotation angles of the first rotating disk 101 and the second rotating disk 201.

[0068] After the triggering member is triggered, the locking member can be linked through the connecting buckle 406 to deactivate the limitation imposed by the locking member on the first rotating disk 101 and the second rotating disk 201.

[0069] Referring to FIG. 14 and FIG. 15, the locking pin 401 is provided with a locking limiting portion 407 which is close to the first rotating disk 101 and the second rotating disk 201 and can limit the rotation angles of the first rotating disk 101 and the second rotating disk 201.

[0070] In addition, for ease of rotation of the trigger 405, when the locking assembly 40 is mounted on the first rotating arm 102, a mounting port 408 can be provided on the first rotating arm 102. When the locking assembly 40 is mounted on the second rotating arm 202, a mounting port 408 can be provided on the second rotating arm 202. The mounting port 408 is a space required for the rotation of the trigger 405.

[0071] Further, the locking pin 401 is provided with a guide slot 409. The fixing pin 402 penetrates through the guide slot 409. The guide slot 409 extends in a length direction of the locking pin 401.

[0072] Further, referring to FIG. 16 to FIG. 19, the first rotating disk 101 is provided with a first rotating contact surface 103, and the second rotating disk 201 is provided with a second rotating contact surface 203. The first rotating contact surface 103 and the second rotating contact surface 203 are opposite to each other. After the first rotating disk 101 and the second rotating disk 201 are rotatably connected through the pin shaft 40, the first rotating contact surface 103 and the second rotating contact surface 203 can rotate relative to each other around the pin shaft 40. The first rotating contact surface 103 is provided with a first limiting slot 104 corresponding to the locking limiting portion 407, and the second rotating contact surface 203 is provided with a second limiting slot 204 corresponding to the locking limiting portion 407.

[0073] When the first rotating arm 102 and the second rotating arm 202 are unfolded relative to each other, the first limiting slot 104 and the second limiting slot 204 are spatially coaxial to form a limiting hole 50. Under the action of the elastic force of the spring 403, the locking limiting portion 407 of the locking pin 401 extends into the limiting hole 50, so that the first rotating contact surface 103 and the second rotating contact surface 203 cannot rotate relative to each other. A shape of the limiting hole 50 matches a shape of the locking limiting portion 407, and a diameter of the locking limiting portion 407 is less than an aperture of the limiting hole 50.

[0074] When the first rotating arm 102 and the second rotating arm 202 are collapsed relative to each other, the pressed end 4052 of the trigger 405 is pulled with a handle, and the trigger 405 rotates around the rotating pin 404 used as a supporting point. During rotation, the trigger 405 drives the locking pin 401 to move backwards through the connecting buckle 406. The locking limiting portion 407 at the end portion of the locking pin 401 is pulled out from the limiting hole 50. In this case, limiting states of the first rotating disk 101 and the second rotating disk 201 are deactivated, and the first rotating contact surface 103 and the second rotating contact surface 203 can rotate relative to each other around the pin shaft 40. The first limiting slot 104 and the second limiting slot 204 are staggered from each other. When the locking limiting portion 407 is reset under the action of the elastic force of the spring 403, its end portion resists against the outer circumferential surface of the first rotating disk 101 or the second rotating disk 201.

[0075] Specifically, when the locking assembly 40 is mounted on the first frame component 10, after the first rotating arm 102 and the second rotating arm 202 are collapsed relative to each other, the first limiting slot 104 and the second limiting slot 204 are staggered from each other, and the locking limiting portion 407 resists against the outer circumferential surface of the second rotating disk 201 under the action of the elastic force of the spring 403.

[0076] When the locking assembly 40 is mounted on the second frame component 20, after the first rotating arm 102 and the second rotating arm 202 are collapsed relative to each other, the first limiting slot 104 and the second limiting slot 204 are staggered from each other, and the locking limiting portion 407 resists against the outer circumferential surface of the first rotating disk 101 under the action of the elastic force of the spring 403.

[0077] The following makes a detailed description to this embodiment in conjunction with a specific state and a collapsing process of the collapsing structure 100.

[0078] Referring to FIG. 19, in this embodiment, a triggering member (the trigger 405) is mounted in an end-portion holding region 60 of the first rotating arm 102 or the second rotating arm 202.

[0079] Specifically, the triggering member (the trigger 405) and a locking body (the locking pin 301) are arranged on an outer side of the same rotating arm (such as the second rotating arm 202) and are located in the end-portion holding region of the second rotating arm 202, thus forming a portion of a holding operating portion W, so that an outer surface of the triggering member (the trigger 405) at least partially forms a holding contact surface of the holding operating portion W.

[0080] When a user holds the holding operating portion W to rotate the first rotating arm 102 and the second rotating arm 202, the user can synchronously perform a triggering operation on the triggering member (the trigger 405) in an action of holding the second rotating arm 202 with a single hand, to drive the locking body (the locking pin 301) to deactivate the locking on the first rotating disk 101 and the second rotating disk 201.

[0081] When the collapsing structure 100 is in an unfolded state, the locking member (the locking pin 401) locks the first rotating disk 101 and the second rotating disk 201. When the collapsing structure 100 is in a collapsed state, a locking action performed by the locking member (the locking pin 401) on the first rotating disk 101 and the second rotating disk 201 is deactivated.

[0082] When the collapsing structure 100 switches from the unfolded state to the collapsed state, the holding regions 60 at one end of the first rotating arm 102 and one end of the second rotating arm 202 are respectively held in the hands of a user. After the triggering member (the trigger 405) is pulled with the hand, the triggering member (the trigger 405) is linked to the locking member (the locking pin 401) through the connecting buckle 406. The locking pin 401 slides relative to the fixing pin 402 through the guide slot 409. In this case, the locking limiting portion 407 is pulled out from the limiting hole 50, and the spring 403 is in a compressed state. The locking action performed by the locking member on the first rotating disk 101 and the second rotating disk 201 is deactivated, and the first rotating disk 101 and the second rotating disk 201 can rotate relative to each other around the pin shaft 40. The first rotating arm 102 and the second rotating arm 202 are rotated with the hands to approach each other until the first rotating arm 102 and the second rotating arm 202 are in contact with each other. During both the unfolding and collapsing of the entire collapsing structure 100, the user holds the end-portion holding regions 60 of the first rotating arm 102 and the second rotating arm 202 respectively with the hands. Throughout the entire operation process, the end portions of the first rotating arm 102 and the second rotating arm 202 are respectively held in the hands of the user, so that both the first rotating arm 102 and the second rotating arm 202 can be stressed, without the problem of non-uniform stress or non-smooth collapsing.

[0083] When the collapsing structure 100 is in the collapsed state, the first limiting slot 104 and the second limiting slot 204 are staggered from each other, and the limiting hole 50 is not formed at this time. When the locking limiting portion 407 is reset under the action of the elastic force of the spring 403, the locking limiting portion 407 cannot find the limiting hole 50, and its end portion can resist against the outer circumferential surface of the first rotating disk 101 or the second rotating disk 201. In a specific design, if the locking pin 401 is arranged in the first rotating arm 102, when the collapsing structure 100 is in the collapsed state, the end portion of the locking limiting portion 407 can resist against the outer circumferential surface of the second rotating disk 201. If the locking pin 401 is arranged in the second rotating arm 202, when the collapsing structure 100 is in the collapsed state, the end portion of the locking limiting portion 407 can resist against the outer circumferential surface of the first rotating disk 101.

[0084] When the collapsing structure 100 switches from the collapsed state to the unfolded state, the holding regions 60 at one end of the first rotating arm 102 and one end of the second rotating arm 202 are respectively held in the hands of the user, and the user pulls away the end portions of the first rotating arm 102 and the second rotating arm 202 towards two sides. In this case, the first rotating disk 101 and the second rotating disk 201 can rotate relative to each other around the pin shaft 40 until the first limiting slot 104 and the second limiting slot 204 are spatially coaxial to form the limiting hole 50. Under the action of the elastic force of the spring 403, the locking limiting portion 407 of the locking pin 401 automatically extends into the limiting hole 50, so that the first rotating contact surface 103 and the second rotating contact surface 203 cannot rotate relative to each other. The collapsing structure 100 can achieve an effect of locking after unfolding.Embodiment 3

[0085] Referring to FIG. 20 to FIG. 23, based on the same technical concept, this embodiment of the present disclosure provides a folding chair 200, including the rotary collapsing structure 100 of Embodiment 1 or Embodiment 2 described above; front legs 210, rear legs 220, two front seat rods 230, and two back rods 240 that are respectively plugged into the first connecting arm 102a and the second connecting arm 202a; a first tension cable 250, where one end of the first tension cable extends into the front legs 210 and is connected to the front legs, and another end of the first tension cable extends into the front seat rods 230 and is connected to the front seat rods; a second tension cable 260, where one end of the second tension cable extends into the rear legs 220 and is connected to the rear legs, and another end of the second tension cable extends into the back rods 240 and is connected to the back rods; and a chair seat 270, where four corners of the chair seat are respectively supported by the two front seat rods 230 and the two back rods 240.

[0086] It should be noted that the accompanying drawings of the folding chair 200 of this embodiment only show the rotary collapsing structure 100 in Embodiment 1. After the folding chair 200 uses the above collapsing structure 100, when the entire folding chair 200 is collapsed and unfolded, an end portion of each of the first rotating arm 102 and the second rotating arm 202 is held in a single hand of a user, so that the stress is uniform, and the collapsing is smooth.

[0087] In addition, in this embodiment, the front leg 210, the rear leg 220, the front seat rod 230, and the back rod 240 on the first rotating arm 102 are all connected to an easily unfolded structure 300. Similarly, the front leg 210, the rear leg 220, the front seat rod 230, and the back rod 240 on the second rotating arm 202 are all connected to the easily unfolded structure 300.

[0088] Referring to FIG. 24 to FIG. 27, the easily unfolded structure 300 includes a supporting rod 320 that is rotatably mounted on a mounting main body 310. The mounting main body 310 is provided with a plugging portion 3101. One end of the supporting rod 320 is a plug-in end 3201 which is suitable for being plugged into the plugging portion 3101.

[0089] It should be noted that in this embodiment, the mounting main body 310 is constructed as the first connecting arm 102a or the second connecting arm 202a in the above embodiment, and the supporting rod 320 is constructed as the front leg 210 or the rear leg 220 or the front seat rod 230 or the back rod 240.

[0090] Further, one of the plugging portion 3101 and the plug-in end 3201 is provided with a pivot 330, and the other one of the plugging portion 3101 and the plug-in end 3201 is provided with a guide slot 340 corresponding to the pivot 330. The pivot 330 is in sliding fit with the guide slot 340. A plugging direction of the supporting rod 320 relative to the plugging portion 3101 is consistent with an extension direction of the guide slot 340. When the plug-in end 3201 of the supporting rod 320 is pulled out from the plugging portion 3101, the supporting rod 320 can rotate relative to the mounting main body 310, thereby forming a folded and collapsed state. After being pulled out from the mounting main body 310, the supporting rod 320 switches to the folded and collapsed state, or in a process that the supporting rod 320 gradually rotates from the folded and collapsed state to the unfolded state, the pivot 330 and the guide slot 340 that are in sliding fit with each other always rotatably connect the supporting rod 320 to the mounting main body 310. In this process, the supporting rod 320 is not detached from the mounting main body 310. When the pivot 330 slides relative to the guide slot 340, it indicates that a distance between the plug-in end 3201 of the supporting rod 320 and the plugging portion 3101 of the mounting main body 310 has changed, so that the supporting rod 320 can be folded and collapsed or unfolded relative to the mounting main body 310, but a central axis of the plugging portion 3101 and a central axis of the plug-in end 3201 are in the same plane. When an angle is formed between the central axis of the plugging portion 3101 and the central axis of the plug-in end 3201, it indicates that the supporting rod 320 is in the folded state. When the central axis of the plugging portion 3101 and the central axis of the plug-in end 3201 are on the same straight line, it indicates that the supporting rod 320 is in the unfolded state. Since the central axis of the plugging portion 3101 and the central axis of the plug-in end 3201 are in the same plane, when the supporting rod 320 switches from the folded state to the unfolded state, the plug-in end 3201 can be automatically aligned with the plugging portion 3101, and the supporting rod 320 is unfolded smoothly.

[0091] In this embodiment, the pivot 330 is mounted on the plugging portion 3101, and the guide slot 340 is formed in the plug-in end 3201. One end of the guide slot 340 is the first limiting end 3401, and another end is a second limiting end 3402. The guide slot 340 has a first assembling position and a second assembling position relative to the pivot 330. When the supporting rod 320 is in a first assembling state (the unfolded state), the plug-in end 3201 is plugged into the plugging portion 3101, and the pivot 330 slides to the first assembling position. In this case, the pivot 330 slides to the first limiting end 3401.

[0092] When the pivot 330 slides to the second assembling position, the pivot 330 slides to the second limiting end 3402 at this time, and the plug-in end 3201 can rotate through the pivot 330 in a first direction relative to the plugging portion 3101, and the supporting rod 320 is in a second assembling state (the folded and collapsed state).

[0093] When the supporting rod 320 switches from the folded and collapsed state to the unfolded state, the plug-in end 3201 can rotate through the pivot 330 in a second direction relative to the plugging portion 3101. The pivot 330 provides mating guidance for the plug-in end 3201 to be plugged into the plugging portion 3101 along a sliding path of the guide slot 340.

[0094] The plugging portion 3101 is equipped with an avoidance port 3102. When the supporting rod 320 rotates from the unfolded state to the folded and collapsed state or from the folded and collapsed state to the unfolded state, the avoidance port 3102 provides a rotation avoidance space for the plug-in end 3201.

[0095] Specifically, there are two avoidance ports 3102 in the plugging portion 3101. The two avoidance ports 3102 are of asymmetric structures. A depth of the avoidance port 3102 on a side close to the mounting main body 310 is greater than a depth of the avoidance port on a side away from the mounting main body 310, to limit the first direction to be a direction of rotation towards the mounting main body 310 and limit the second direction to be a direction of rotation away from the mounting main body 310.

[0096] After the first direction is limited by the avoidance port 3102, when the supporting rod 320 rotates in the first direction and is in the second assembling state (folded retracted state), the supporting rod 320 tends to be in contact with a surface of the mounting main body 310, to form a bundle.

[0097] In addition, the deeper avoidance port 3102 on the side close to the mounting main body 310 provides a larger rotation avoidance space for the supporting rod 320, so that a folding angle of the supporting rod is large. On the contrary, if the supporting rod 320 rotates toward the side away from the mounting main body 310, the shallower avoidance port cannot provide a larger avoidance space, so that the folding angle of the supporting rod 320 is smaller. This can achieve a foolproof effect, and a user can intuitively understand that a rotary folding direction of the supporting rod 320 faces toward the mounting main body 310. Moreover, after being folded, the supporting rod 320 is in contact with the surface of the mounting main body 310, to form the bundle. When there are a plurality of supporting rods 320, the plurality of supporting rods 320 can be in contact with the surface of the mounting main body 310 after being folded, thereby reducing a volume of the entire collapsed structure and facilitating bundling and constraining.

[0098] When the pivot 330 slides to the first limiting end 3401 of the guide slot 340, the supporting rod 320 is in the first assembling state. In this case, the plug-in end 3201 of the supporting rod 320 extends into the plugging portion 3101, and the supporting rod 320 is locked relative to the plugging portion 3101. Specifically, in this state, the pivot 330 limits the supporting rod 320, and the supporting rod 320 cannot further extend into the plugging portion 3101 under a force. Meanwhile, the supporting rod 320 cannot rotate relative to the plugging portion 3101, thereby achieving a high-strength supporting effect after unfolding.

[0099] When the pivot 330 slides to the second limiting end 3402 of the guide slot 340, the supporting rod 320 is in the second assembling state. The plug-in end 3201 of the supporting rod 320 is pulled out from the plugging portion 3101, and the plug-in end 3201 can rotate within the avoidance space provided by the avoidance port 3102 by using the pivot 330 as a center. The supporting rod 320 can rotate relative to the mounting main body 310 until a circumferential surface of the supporting rod 320 is in contact with a bottom surface of the avoidance port 3102, and the supporting rod 320 is in the folded state relative to the mounting main body 310.

[0100] Further, in this embodiment, a distance L1 between a center of the pivot 330 and a bottom of the avoidance port 3102 is less than a length L2 of the guide slot 340. The advantage of this size design is that when the plug-in end 3201 of the supporting rod 320 is completely plugged into the plugging portion 3101, the pivot 330 is located at the first limiting end 3401 of the guide slot 340. When the plug-in end 3201 of the supporting rod 320 is completely pulled out from the plugging portion 3101, the pivot 330 is located at the second limiting end 3402 of the guide slot 340. When L2 is greater than L1, after the plug-in end 3201 of the supporting rod 320 is completely pulled out from the plugging portion 3101, the pivot 330 reaches the second limiting end 3402, and an end surface of the plug-in end 3201 completely leaves the plugging portion 3101 and enters the avoidance space. In this case, the end surface of the plug-in end 3201 can only be located within a space in which the avoidance port 3102 is located. In this case, the plug-in end 3201 can rotate within the space provided by the avoidance port 3102 by using the pivot 330 as a center.

[0101] Further, in this embodiment, there are two or more plugging portions 3101 on the mounting main body 310, and there are two or more supporting rods 320 plugged onto the mounting main body 310. It is convenient to plug a plurality of supporting rods 320 on the mounting main body 310.

[0102] An elastic member 350 is arranged between the supporting rods 320 and the mounting main body 310. The elastic member 350 is preferably a tension cable. One end of the elastic member 350 extends into and is connected to one supporting rod 320, and another end of the elastic member 350 extends into the mounting main body 310 and further into another supporting rod 320 and is connected to the supporting rod. The elastic member 350 is a first tension cable 250 or a second tension cable 260.

[0103] Specifically, a buckle cover 360 is generally mounted at an end portion of the supporting rod 320, and an end portion of the elastic member 350 extends into the supporting rod 320 and is connected to the buckle cover 360. An example in which two supporting rods 320 are mounted on the mounting main body 310 is used. After the elastic member 350 is mounted between the two supporting rods 320, two ends of the elastic member 350 respectively play a role in pulling the supporting rods 320. When the supporting rods 320 are not plugged on the mounting main body 310, the supporting rods 320 can be pulled by the elastic member 350. When the supporting rods 320 are plugged into the plugging portion 3101, the elastic member 350 remains in a natural or stretched state. When the supporting rods 320 are in a rotary folded state relative to the mounting main body 310, the elastic member 350 is in an elastically stretched state. When the supporting rods 320 switch from the folded state to the unfolded state, the plug-in ends 3201 of the supporting rods 320 can be automatically plugged into the plugging portion 3101 under an elastic tension of the elastic member 350. In this easily unfolded structure, due to the cooperation between the pivot 330 and the guide slot 340, and the structural design of the elastic member 350, when the supporting rods 320 are in the folded state, external constraints are deactivated, and the supporting rods 320 can achieve automatic alignment and automatic plugging with the plugging portion 3101.

[0104] In summary, a flexible elastic member 350 is configured between the supporting rods 320 and the frame component. The elastic member 350 is in a stretched energy storage state when the supporting rods 320 are folded.

[0105] When the external constraints are deactivated, a contraction force of the elastic member 350 drives the supporting rod 320 to rotate around the pivot 330, so that the central axis of the plug-in end 3201 and the central axis of the plugging portion 3101 are automatically aligned along the same axis. An axial force of the elastic member 350 drives the pivot 330 to slide from the second limiting end 3402 to the first limiting end 3401 along the guide slot 340, so that the plug-in end 3201 is plugged into the plugging portion 3101 in the plugging direction.

[0106] The following provides a detailed explanation on the present disclosure in conjunction with a specific usage state of the easily unfolded structure 300.

[0107] The easily unfolded structure 300 of the present disclosure includes a folded state and an unfolded state. In the folded state, the supporting rod 320 is folded relative to the mounting main body 310. In the unfolded state, the supporting rod 320 is plugged into the plugging portion 3101 of the mounting main body 310. It should be noted that when the supporting rod 320 is in the folded state relative to the mounting main body 310, the elastic member 350 is in the stretched state and can generate a pulling force on the supporting rod 320. Therefore, the mounting main body 310 can be provided with a restraint strap (not shown) to bundle and fix the supporting rod 320.

[0108] Specifically, in the process of switching of the easily unfolded structure 300 from the folded state to the unfolded state, the supporting rod 320 rotates around the mounting main body 310 connected to the supporting rod and rotates until the plug-in end 3201 is opposite to the plugging portion 3101. In this case, the elastic member 350 is in the stretched state. Under the elastic tension of the elastic member 350, the plug-in end 3201 of the supporting rod 320 is automatically plugged into the plugging portion 3101.

[0109] Further, when the easily unfolded structure 300 is in the folded state, the pivot 330 is located at the second limiting end 3402. When the easily unfolded structure 300 is in the unfolded state, the pivot 330 is located at the first limiting end 3401.

[0110] When the easily unfolded structure 300 switches from the folded state to the unfolded state, under the elastic tension of the elastic member 350, the supporting rod 320 rotates around the mounting main body 310 by using the pivot 330 as a center, until the plug-in end 3201 of the supporting rod 320 is opposite to the plugging portion 3101. Meanwhile, under the elastic tension of the elastic member 350, the plug-in end 3201 of the supporting rod 320 is plugged into the plugging portion 3101. In this process, the pivot 330 slides from the second limiting end 3402 to the first limiting end 3401 relative to the guide slot 340.

[0111] When the easily unfolded structure 300 switches from the unfolded state to the folded state, the pivot 330 slides from the first limiting end 3401 to the second limiting end 3402 relative to the guide slot 340. The supporting rod 320 rotates around the frame component 310 by using the pivot 330 as a center. The elastic member 350 remains in the stretched state, and the avoidance port 3102 provides the avoidance space required by rotation for the plug-in end 3201.

[0112] In summary, the easily unfolded structure 300 is applied to a connection position between the supporting rod 320 and the mounting main body 310. The plug-in end 3201 of the supporting rod 320 is rotatably connected to the plugging portion 3101 of the mounting main body 310 through the pivot 330. A guide slot 340 that is in sliding fit with the pivot 330 is formed in the plug-in end 3201 of the supporting rod 320 or the plugging portion 3101 of the mounting main body 310. Moreover, the plugging portion 3101 is provided with the avoidance port 3102. When the supporting rod 320 is pulled out of the plugging portion 3101 for a distance until the pivot 330 slides to the second limiting end 3401 of the guide slot 340, the supporting rod 320 rotates relative to the plugging portion 3101 by using the pivot 330 as a center and is in the folded state. The avoidance port 3102 provides an avoidance space required by the plug-in end 3201 to rotate out of the plugging portion 3101. The supporting rod 320 in the folded state and the plugging portion 3101 are in a state of being rotatably connected to each other, but not separated.

[0113] When the supporting rod 320 needs to be unfolded, the supporting rod 320 reversely rotates relative to the plugging portion 3101 by using the pivot 330 as a center. When the plug-in end 3201 of the supporting rod 320 is opposite to the plugging portion 3101, the plug-in end 3201 can be plugged into the plugging portion 3101. In this case, the pivot 330 slides to the first limiting end 3401 of the guide slot 340, and limits the supporting rod 320. Under a force, the supporting rod 320 cannot further extend into the plugging portion 3101. Meanwhile, the supporting rod 320 cannot rotate relative to the plugging portion 3101, thus achieving a high-strength supporting effect after unfolding. After the easily unfolded structure is used, in the process of switching of the supporting rod 320 from the folded state to the unfolded state, manual mating between the plug-in end 3201 of the supporting rod 320 and the plugging portion 3101 of the mounting main body 310 is not required. Through the cooperation between the pivot 330 and the guide slot 340, after the supporting rod 320 is unfolded, the plug-in end 3201 of the supporting rod can be automatically aligned with the plugging portion 3101, and it is convenient and efficient for assembling between the supporting rod 320 and the mounting main body 310.

[0114] In addition, the elastic member 350 is configured between the supporting rods 320 and the mounting main body 310. When the supporting rods 320 are in the folded state, the elastic member 350 is in the stretched state. When the supporting rods 320 switch from the folded state to the unfolded state, the plug-in ends 3201 of the supporting rods 320 can be automatically plugged into the plugging portion 3101 under an elastic tension of the elastic member 350. In this easily unfolded structure, due to the cooperation between the pivot 330 and the guide slot 340, and the structural design of the elastic member 350, when the supporting rods 320 are in the folded state, external constraints are deactivated, and the supporting rod 320 can achieve automatic alignment and automatic plugging with the plugging portion 3101.

[0115] In the collapsing process of the entire folding chair, the end portion of each of the first rotating arm 102 and the second rotating arm 202 is held in the single hand of the user, so that the stress is uniform and the collapsing is smooth. Moreover, the front legs 210, the rear legs 220, the front seat rods 230, and the back rods 240 are movably mounted on the first rotating arm 102 and the second rotating arm 202, so that it is convenient to fold them. When the rods are reset, the rods can be automatically aligned and plugged, making the operation convenient and fast.Embodiment 4

[0116] Referring to FIG. 28 to FIG. 29, based on the same technical concept, an embodiment of the present disclosure provides a folding chair 200 (a chair seat is not shown in this embodiment), including the rotary collapsing structure 100 in Embodiment 1 or Embodiment 2 described above. It should be noted that the accompanying drawings of the folding chair 200 of this embodiment only show the rotary collapsing structure 100 in Embodiment 1. After the folding chair 200 uses the above collapsing structure 100, an end portion of each of the first rotating arm 102 and the second rotating arm 202 is held in a single hand of a user during collapsing and unfolding of the entire folding chair 200, so that the stress is uniform, and the collapsing is smooth.

[0117] In addition, in this embodiment, the front leg 210, the rear leg 220, the front seat rod 230, and the back rod 240 on the first rotating arm 102 are all connected to an easily unfolded structure 300. Similarly, the front leg 210, the rear leg 220, the front seat rod 230, and the back rod 240 on the second rotating arm 202 are all connected to the easily unfolded structure 300.

[0118] Referring to FIG. 30 to FIG. 34, a difference between this embodiment and Embodiment 3 described above lies in the structural design of the easily unfolded structure 300 in this embodiment and the structural design of the easily unfolded structure in Embodiment 3. A design difference of the easily unfolded structure 300 in this embodiment is as follows: A plugging opening 3103 is formed in the plugging portion 3101. A supporting guide portion 3400 is arranged on a side surface of the plugging portion 3101, and a sliding guide portion 3202 corresponding to the supporting guide portion 3400 is arranged at the plug-in end 3201.

[0119] The supporting rod 320 has a first assembling state and a second assembling state relative to the mounting main body 310. When the supporting rod 320 switches from the second assembling state to the first assembling state, under action of a tension of the elastic member 350, the sliding guide portion 3202 slides along the supporting guide portion 3400, to guide the plug-in end 3201 to be aligned with and plugged into the plugging opening 3103.

[0120] Specifically, when the supporting rod 320 is in the first assembling state, the supporting rod 320 is in the unfolded state relative to the mounting main body 310. When the supporting rod 320 is in the second assembling state, the supporting rod 320 is in the folded and collapsed state relative to the mounting main body 310.

[0121] In addition, when the supporting rod 320 is in the folded and collapsed state relative to the mounting main body 310, the elastic member 350 is in the stretched state. Under a bundling constraint force, the supporting rod 320 remains in the folded and collapsed state. When the bundling constraint force disappears, the elastic member 350 drives the supporting rod 320 to flip. After the plug-in end 3201 is aligned with and plugged into the plugging opening 3103, the supporting rod 320 is in the unfolded state relative to the mounting main body 310.

[0122] Further, referring to FIG. 31, a guide slot 3104 is formed in the plugging portion 3101. One end of the guide slot 3104 is communicated to the plugging opening 3103. When the supporting rod 320 rotates relative to the plugging portion 3101, the elastic member 350 can be driven to enter or leave the guide slot 3104.

[0123] The supporting guide portion 3400 is arranged on the plugging portion 3101 and faces toward one side of the mounting main body 310. When the supporting rod switches from the unfolded state to the folded and collapsed state, the supporting rod 320 tends to be in contact with a surface of the mounting main body 310, to form a compact closed-up state. Since the guide slot 3104 is formed in the supporting guide portion 3400, the supporting rod 320 can drive the elastic member 350 to enter or leave the guide slot 3104 no matter the supporting rod 320 is unfolded or folded and collapsed, which can achieve a foolproof effect. A user can intuitively learn that a rotary folding direction of the supporting rod 320 is towards the mounting main body 310. Moreover, after being folded, the supporting rod 320 is in contact with the surface of the mounting main body 310 to form a bundle. In this embodiment, there are two or more plugging portions 3101 on the mounting main body 310, and there are two or more supporting rods 320 plugged on the mounting main body 310. When there are a plurality of supporting rods 320, the plurality of supporting rods 320 can be in contact with the surface of the mounting main body 310 after being folded. This can reduce the volume of the entire structure after folding and facilitate bundling constraining.

[0124] Further, the supporting guide portion 3400 includes a planar guide section 3400a and an arc-shaped guide section 3400b. The arc-shaped guide section 3400b is connected to the plugging opening 3103. A surface of the sliding guide portion 3202 is an arc-shaped surface. When the supporting rod 320 switches from the folded and collapsed state to the unfolded state, the elastic member 350 drives the plug-in end 3201 to sequentially pass through the planar guide section 3400a and the arc-shaped guide section 3400b. The plug-in end 3201 flips along a trajectory of the arc-shaped guide section 3400b and is plugged into the plugging opening 3103, thereby implementing automatic alignment and automatic plugging between the supporting rod 320 and the plugging portion 3101 of the mounting main body 310. It is convenient and efficient for assembling between each supporting rod 320 and the mounting main body 310.

[0125] Further, the elastic member 350 is preferably an elastic tension cable. One end of the elastic member 350 extends into and is connected to one supporting rod 320, and another end of the elastic member 350 extends into the mounting main body 310 and further into another supporting rod 320 and is connected to the supporting rod.

[0126] In this embodiment, referring to FIG. 32 and FIG. 33, the easily unfolded structure 300 includes a folded state and an unfolded state. When the plug-in end 3201 is plugged into the plugging portion 3101, the supporting rod 320 stops relative to the plugging portion 3101. In this case, the easily unfolded structure 300 is in the unfolded state.

[0127] When the plug-in end 3201 is pulled out from the plugging portion 3101, the supporting rod 320 can rotate relative to the plugging portion 3101. In this case, the easily unfolded structure 300 is in the folded state, and the elastic member 350 is in the stretched state.

[0128] Specifically, when the easily unfolded structure 300 switches from the unfolded state to the folded state, the plug-in end 3201 is pulled out from the plugging portion 3101, and then the supporting rod 320 is rotated. The supporting rod 320 is in the folded state, and the elastic member 350 is introduced into the guide slot 3104. Meanwhile, the elastic member 350 is in the stretched state.

[0129] When the easily unfolded structure 300 switches from the folded state to the unfolded state, under the action of the tension of the elastic member 350, the supporting rod 320 rotates toward the mounting main body 310. The sliding guide portion 3202 at the end portion of the supporting rod 320 slides relative to the supporting guide portion 3400 until the plug-in end 3201 of the supporting rod 320 is plugged into the plugging portion 3101, and the supporting rod 320 is completely in the unfolded state. Since the supporting guide portion 3400 includes the planar guide section 3400a and the arc-shaped guide section 3400b, the arc-shaped guide section 3400b is connected to the plugging opening 3103. In the unfolding process, the sliding guide portion 3202 at the end portion of the supporting rod 320 is sequentially in contact with the flat guide section 3400a and the arc-shaped guide section 3400b, and the arc-shaped guide section 3400b can smoothly and continuously introduce the sliding guide portion 3202 into the plugging opening 3103.

[0130] In order to ensure the stability and strength of supporting after the supporting rod 320 is unfolded, referring to FIG. 34, a limiting step 3105 is arranged on an inner wall of the plugging opening 3103. When the plug-in end 3201 of the supporting rod 320 is plugged into the plugging portion 3101, the limiting step 3105 limits a plugging stroke of the supporting rod 320. When the supporting rod 320 is subjected to a pressure or a supporting force, the supporting rod 320 limited by the limiting step 3105 cannot be further plugged into the plugging portion 3101. The supporting rod 320 can be stably supported at the plugging portion 3101, but can be pulled out.

[0131] In summary, the easily unfolded structure 300 is applied to a connection position between the supporting rod 320 and the mounting main body 310. Under normal circumferences, the plug-in end 3201 of the supporting rod 320 is plugged into the plugging portion 3101 of the mounting main body 310, and the supporting rod 320 stops relative to the plugging portion 3101. In this case, the easily unfolded structure 300 is in the unfolded state. When the easily unfolded structure 300 is folded, the plug-in end 3201 of the supporting rod 320 is pulled out from the plugging portion 3101, and the supporting rod 320 can rotate relative to the plugging portion 3101. The elastic member 350 is smoothly introduced into the guide slot 3104 from the plugging opening 3103 and is in the stretched state. When the easily unfolded structure 300 switches from the folded state to the unfolded state, the elastic member 350 is reset. Under the action of the tension of the elastic member 350, the sliding guide portion 3202 at the end portion of the supporting rod 320 is in contact with the supporting guide portion 3400 on the side surface of the mounting main body 310 and slides relative to the supporting guide portion 3400, until the plug-in end 3201 of the supporting rod 320 is plugged into the plugging opening 3103 of the plugging portion 3101, thereby implementing automatic resetting of the supporting rod 320. After the easily unfolded structure is used, the supporting rod 320 switches from the folded state to the unfolded state. Manual mating is not required between the plug-in end 3201 of the supporting rod 320 and the plugging portion 3101 of the mounting main body 310. Under the action of the tension of the elastic member 350, due to the sliding fit between the sliding guide portion 3202 and the supporting guide portion 3400, after the supporting rod 320 is unfolded, the plug-in end 3201 of the supporting rod 320 can be automatically aligned with the plugging portion 3101, and it is convenient and efficient for assembling between the supporting rod 320 and the mounting main body 310.

[0132] In addition, when the supporting rod 320 switches from the folded state to the unfolded state, the elastic member 350 is transferred and reset from the guide slot 3104 to the plugging opening 3103. The guide slot 3104 plays a role in resetting guidance on the elastic member 350, which ensures stability of the elastic member 350 in a tension direction. When the supporting rod 320 is mated with the plugging portion 3101, the mating of the supporting rod 320 is precise and stable.Embodiment 5

[0133] Referring to FIG. 35 and FIG. 36, based on the same technical concept, an embodiment of the present disclosure provides a storage box rack 400, including the rotary collapsing structure 100 of Embodiment 1 or Embodiment 2, supporting legs 410 respectively plugged onto the first rotating arm 102 and the second rotating arm 202, and supporting blocks 420 arranged on surfaces of the first rotating arm 102 and the second rotating arm 202. The supporting legs 410 are connected to the first rotating arm 102 and the second rotating arm 202 through the easily unfolded structure 300 shown in Embodiment 3.

[0134] During use of the storage box rack 400, a storage box 430 is placed on the supporting blocks 420, and surfaces of the supporting blocks 420 are friction surfaces 440. When the storage box 430 is placed, an anti-slip effect can be achieved.

[0135] The storage box rack 400 can be collapsed and unfolded during use. It should be noted that the accompanying drawings of the storage box rack 400 in this embodiment only show the rotary collapsing structure 100 in embodiment 1. Due to the design in which the first rotating arm 102 and the second rotating arm 202 uses the rotary collapsing structure 100, the end portion of each of the first rotating arm 102 and the second rotating arm 202 is held in a single hand of a user during collapsing and unfolding of the storage box rack 400, so that the stress is uniform and the collapsing is smooth. The supporting legs 410 can be folded and collapsed. When external constraints are deactivated, the supporting legs 410 can be automatically aligned with and automatically plugged into the first rotating arm 102 and the second rotating arm 202.Embodiment 6

[0136] Referring to FIG. 37 and FIG. 38, based on the same technical concept, an embodiment of the present disclosure provides a storage box rack 400, including the rotary collapsing structure 100 of Embodiment 1 or Embodiment 2, supporting legs 410 respectively plugged onto the first rotating arm 102 and the second rotating arm 202, and supporting blocks 420 arranged on surfaces of the first rotating arm 102 and the second rotating arm 202. The supporting legs 410 are connected to the first rotating arm 102 and the second rotating arm 202 through the easily unfolded structure 300 shown in Embodiment 4. The end portion of each of the first rotating arm 102 and the second rotating arm 202 is held in a single hand of a user during collapsing and unfolding of the storage box rack 400, so that the stress is uniform and the collapsing is smooth. The supporting legs 410 can be folded and collapsed. When external constraints are deactivated, the supporting legs 410 can be automatically aligned with and automatically plugged into the first rotating arm 102 and the second rotating arm 202.Embodiment 7

[0137] Referring to FIG. 39 and FIG. 40, based on the same technical concept, an embodiment of the present disclosure provides a table 500, including the rotary collapsing structure 100 in Embodiment 1 or Embodiment 2; a lower supporting leg 510 and an upper supporting rod 520 that are respectively plugged onto the first rotating arm 102 and the second rotating arm 202; a supporting assembly 530 connected to the upper supporting rod 520; and a table board unit 540 placed above the supporting assembly 530. It should be noted that the accompanying drawings of the table 500 in this embodiment only show the rotary collapsing structure 100 in Embodiment 1.

[0138] In this embodiment, the supporting assembly 530 includes: a plug 5301 suitable for being plugged to an end portion of the upper supporting rod 520; a lower buckle plate 5302 mounted at one end of the plug 5301; and a table board supporting rod 5303 in buckling connection with the lower buckle plate 5302.

[0139] Further, an upper buckle plate 550 is arranged at a bottom of the table board unit 540. During assembling of the table, the lower supporting leg 510 and the upper supporting rod 520 are respectively plugged into the first rotating arm 102 and the second rotating arm 202. The plug 5301 is plugged into the end portion of the upper supporting rod 520, and the table board supporting rod 5303 is in buckling connection to the lower buckle plate 5302 on the plug 5301. The table board supporting rod 5303 is supported at the bottom of the table board unit 540, and the upper buckle plate 550 at the bottom of the table board unit 540 is in buckling connection to the table board supporting rod 5303.

[0140] The table 500 is composed of the detachable table board unit 540, the supporting assembly 530, the collapsing structure 100, the lower supporting leg 510, and the upper supporting rod 520. The collapsing structure 100 serves as a main support for the table. The end portion of each of the first rotating arm 102 and the second rotating arm 202 is held in a single hand of a user during collapsing and unfolding of the collapsing structure 100, so that the stress is uniform and the collapsing is smooth.Embodiment 8

[0141] Referring to FIG. 41 to FIG. 50, based on the same technical concept, an embodiment of the present disclosure provides a table 600, including the rotary collapsing structure 100 of Embodiment 1 or Embodiment 2 described above, and a folding table board 700 laid at a top of the rotary collapsing structure 100. The accompanying drawings of this embodiment show the rotary collapsing structure 100 of Embodiment 1 (where the locking assembly 30 is not assembled).

[0142] Each of the first connecting arm 102a and the second connecting arm 202a of the rotary collapsing structure 100 is provided with an upper supporting arm 610 and a lower supporting arm 620. The upper supporting arm 610 and the lower supporting arm 620 are connected to the first connecting arm 102a and the second connecting arm 202a by using the easily unfolded structure 300 shown in Embodiment 3 or Embodiment 4. The accompanying drawings in this embodiment show the easily unfolded structure 300 in Embodiment 3. One end of each upper supporting arm 610 is connected to a linkage member 630. Unit beams 6201 and 6202 are slidably mounted on the linkage members 630, namely, the unit beams 6201 and 6202 can slide relative to the linkage members 630.

[0143] In addition, the linkage members 630 also maintains relative rotatable connection with the upper supporting arms 610.

[0144] Referring to the unfolded state shown in FIG. 41, the unit beams 6201 and 6202 are mutually nested to form supporting beams 6200. Two ends of the supporting beams 6200 are mounted on the linkage members 630 and are connected to the upper supporting arms 610 through the linkage members 630, so as to construct, at a top of the rotary collapsing structure 100 through the supporting beams 620, a supporting platform for supporting an external component.

[0145] During practical use, the external component can be a table top, or a storage box, or any other object that can be placed between two horizontal rods.

[0146] The unit beams 6201 and 6202 in the unfolded state shown in FIG. 41 can be separated when an external operating force is applied, and the separated unit beams 6201 and 6202 are shown in FIG. 42.

[0147] An external operating force for collapsing is continued to be applied, to drive the separated unit beams 6201 and 6202 to rotate and approach each other, specifically as shown in FIG.43. The two unit beams 6201 and 6202 that approach each other drive the linkage members 630, so that the linkage members 630 are driven to rotate relative to the upper supporting arms 610, thereby driving the rotary collapsing structure 100 to implement rotary collapsing. A diagram of a rotatably collapsed state is shown in FIG. 44.

[0148] In short, during collapsing, an external force causes the two nested unit beams 6201 and 6202 to slide away from each other along the linkage members 630 for separation, and then to approach each other. The two unit beams 6201 and 6202 that approach each other then drive the linkage members 630 to rotate relative to the upper supporting arms 610, thereby driving the rotary collapsing structure 100 to implement rotary collapsing.

[0149] The unit beams 6201 and 6202 in the rotatably collapsed state are located on back sides of the upper supporting arms 610, and respectively approach the upper supporting arms 610 corresponding to the unit beams, to form a compact collapsed form. Still further, a hinge arm 6302 of each linkage member 630 has an avoidance slot 6302a. A geometric shape of the avoidance slot 6302a (such as an arc-shaped groove and a U-shaped notch) matches each upper supporting arm 610, so that the upper supporting arm 610 in rotatably collapsed state is embedded into the avoidance slot 6302a, and the unit beams 6201 and 6202 respectively approach the upper supporting arms 610 corresponding to the unit beams and abut against the upper supporting arms 610, to form a more compact collapsed form. In this case, preferably, a central axis of each of the unit beam 6201 and the unit beam 6202 are parallel to a central axis of each upper supporting arm 610.

[0150] Further, the upper supporting arms 610 can be flipped and folded to a base portion of a main bracket.

[0151] In this case, as shown in FIG. 45, a unit beam 6201 and a unit beam 6202 that are close to and abut against the upper supporting arms 610 can be flipped and folded together with the upper supporting arms 610 to the base portion of the rotary collapsing structure 100.

[0152] In addition, the lower supporting arms 620 of the rotary collapsing structure 100 can also be flipped and folded to the base portion of the rotary collapsing structure 100.

[0153] In this case, as shown in FIG. 45, the lower supporting arms 620 are flipped and folded to the base portion of the rotary collapsing structure 100. Meanwhile, the unit beams 6201 and 6202 are flipped and folded to the base portion of the rotary collapsing structure 100 along with the upper supporting arms 610, to form a bundled folded state (as shown in FIG. 46). In this state, an external restraint strap, such as a restraint rope, can be used for bundling and fixing.

[0154] Continuing to refer to FIG. 41 to FIG. 45, a first elastic member 660 is further arranged inside each supporting beam 6200. One end of the first elastic member 660 is connected to one unit beam 6201 of the supporting beam 6200, and another end is connected to the other unit beam 6202. The first elastic member 660 is suitable for applying a mutual mating tension to the two unit beams 6201 and 6202 that are nested. When end portions of the two unit beams 6201 and 6202 are mated, the tension generated by the first elastic member 660 can quickly nest the two unit beams 6201 and 6202. In this embodiment, the first elastic member 660 can be implemented as an elastic rope.

[0155] In an unfolding process, when the end portions of the unit beams 6201 and 6202 are manually operated to approach each other, the first elastic member 660 provides a continuous mating tension, so that the two unit beams can be quickly nested and locked without fine adjustment, thus forming the supporting beam 6200 (as shown in FIG. 41). This greatly improves unfolding efficiency and avoids tedious operations of manual alignment and plugging. During collapsing, a user needs to apply an external operating force to counteract the tension of the first elastic member 660 to separate the unit beams 6201 and 6202 (such as the state in FIG. 42).

[0156] Further referring to FIG. 41, FIG. 42, and FIG. 47, each linkage member 630 includes a hinge arm 6302 and a sleeve 6301 fixedly connected to the hinge arm 6302. The hinge arm 6302 is movably connected to a corresponding upper supporting arm 610, for example, the hinge arm 6302 is movably hinged to the upper supporting arm 610, and the sleeve 6301 is slidably sleeved at peripheries of the unit beams 6201 and 6202.

[0157] In addition, limiting ends 670 are respectively fixedly mounted at the end portions of the unit beams 6201 and 6202. A limiting slot 6701 is formed in one of each limiting end 670 and each sleeve 6301, and a limiting protrusion 6304 matching the limiting slot 6701 is arranged on the other one. Specifically, the limiting slot 6701 is formed in the limiting end 670, and the limiting protrusion 6304 is arranged on the sleeve 6301. After the two unit beams 6201 and 6202 are mated to form the supporting beam 6200, the limiting ends 670 are close to the sleeves 6301. The unit beams 6201 and 6202 and the sleeves 6301 are in limiting fit through the limiting slots 6701 and the limiting protrusions 6304, and the assembled supporting beam 6200 is circumferentially limited by the sleeves 6301, without rotating within the sleeves 6301. When the two unit beams 6201 and 6202 are separated, the unit beams 6201 and 6202 slide within the sleeves 6301; the limiting ends 670 at the end portions of the unit beams 6201 and 6202 are away from the sleeves 6301; and the sleeves 6301 deactivate the circumferential limitation on the unit beams 6201 and 6202.

[0158] Further, each linkage member 630 further includes a connecting cap 6303. The connecting caps 6303 are rotatably connected to the upper supporting arms 610 and can rotate around the upper supporting arms 610. The hinge arms 6302 are kept being movably hinged to the connecting caps 6303, and the connecting caps 6303 provide an additional degree of freedom of rotation.

[0159] It can be understood that when the two unit beams 6201 and 6202 are operated to approach each other, it is difficult to achieve a "perfect" rotation force under a manually applied force. In actual operation, there may be a "skewed" or "offset" lateral force. The connecting caps 6303 can be sleeved on the upper supporting arms 610 in a freely rotatable manner. When an approaching action of the unit beams 6201 and 6202 carries the "skewed force" (a lateral component force), the connecting caps 6303 can rotate slightly along with this "skewed force" to make the entire collapsing action smoother.

[0160] In this way, the hinge arms 6302 provide a degree of freedom of swinging in a rotation direction of the unit beams 6201 and 6202, and the connecting caps 6303 provide a degree of freedom of 360° rotation around axes of the upper supporting arms 610, thus forming a universal motion mechanism.

[0161] It can be learned that the linkage members 630 are preferably maintained in universal movable connection with the upper supporting arms 610. Those skilled in the art should be aware that the universal motion mechanism is not limited to a combined structure of the hinge arms 6302 and the connecting caps 6303 illustrated in this embodiment, but can be replaced by another universal motion mechanism, such as replacing the connecting caps 6303 with spherical joint sockets and changing tail ends of the hinge arms 6302 to ball heads. Or, the hinge arms 6302 are connected to the connecting caps 6303 through cross shafts.

[0162] Further, for the rotary collapsing structure 100, continue to refer to FIG. 41. The base portion of the rotary collapsing structure 100 includes a first frame component 10 and a second frame component 20 rotatably connected to the first frame component 10. That is, the first frame component 10 and the second frame component 20 can rotate relative to each other. During collapsing, the two unit beams 6201 and 6202 that approach each other can drive the first frame component 10 and the second frame component 20 to be rotatably collapsed relative to each other.

[0163] Specifically, as shown in FIG. 43, two ends of each of the first frame component 10 and the second frame component 20 are connected and provided with the linkage members 630. The unit beams 6201 are connected to the linkage members 630 of the second frame component 20, and the unit beams 6202 are connected to the linkage members 630 of the first frame component 10. The collapsing direction of the unit beams 6201 and 6202 is the same as the collapsing direction of the first frame component 10 and the second frame component 20.

[0164] That is, one linkage member 630 is connected to each of the two ends of the first frame component, and each linkage member 630 is slidably provided with the unit beam 6202. One linkage member 630 is connected to each of the two ends of the second frame component 20, and each linkage member 630 is slidably provided with the unit beam 6201. A user applies an external force to make the separated unit beams 6201 and 6202 approach each other, and the approaching unit beams 6201 and 6202 drive the correspondingly connected linkage members 630.

[0165] The approaching action of the unit beams 6201 drive the linkage members 630 of the second frame component 20 to rotate and drive the second frame component 20 to rotate.

[0166] The approaching action of the unit beams 6202 drive the linkage members 630 of the first frame component 10 to rotate and drive the first frame component 10 to rotate.

[0167] In this way, the user only needs to complete one action of making the unit beams approach, to synchronously drive the collapsing of the entire main bracket.

[0168] When the rotary collapsing structure 100 is unfolded, a plurality of upper supporting arms 610 form a support at the bottom of the supporting platform, and a plurality of lower supporting arms 620 form a support on the ground.

[0169] Correspondingly, referring to FIG. 48 to FIG. 50, when the table 600 is unfolded, the rotary collapsing structure 100 is first unfolded based on the manner described in the above embodiment. Clamping slots 710 are formed in a bottom of the folding table board 700, and clamping blocks 6602 are arranged at tops of supporting heads 660a of the collapsing structure 100. After the collapsing structure 100 is unfolded, the unit beams 6201 and 6202 are nested to form the integrated rigid supporting beams 6200. The two ends of the supporting beams 6200 are connected to the upper supporting arms 610 through linkage members 630 to form the supporting platform at the top of the collapsing structure 100. When the folding table board 700 is laid at the tops of the supporting beams 6200, the clamping blocks 6602 at the end portions of the supporting beams 6200 are clamped with the clamping slots 710 in the bottom of the folding table board 700. The unfolded folding table board 700 can be stably supported by the collapsing structure 100 at the bottom.

[0170] It should be finally noted that: The foregoing embodiments are merely intended to describe the technical solutions of the present disclosure, but not for limiting the present disclosure. Although the present disclosure is described in detail with reference to the foregoing various embodiments, persons of ordinary skill in the art should understand that they may still make modifications to the technical solutions described in the foregoing embodiments or make equivalent replacements to partial or all technical features thereof. However, these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the various embodiments of the present disclosure.

Claims

1. A rotary collapsing structure, comprising: a first rotating member and the second rotating member which are rotatably connected to each other through a rotating shaft; a first constraint portion arranged on the first rotating member; a second constraint portion arranged on the second rotating member; and an elastically reset locking body, wherein in an unfolded state, the first constraint portion and the second constraint portion are spatially coaxial with each other to form a circumferentially closed constraint hole; the locking body is driven by an elastic force to be embedded into the constraint hole and forms circumferential interference with an inner wall of the constraint hole to prevent relative rotation between the first rotating member and the second rotating member; in a collapsed state, the locking body is detached from the constraint hole; the first rotating member and the second rotating member rotate relative to each other around the rotating shaft; and under the elastic force, the locking body abuts against an outer circumferential surface of the first rotating member or the second rotating member.

2. The rotary collapsing structure according to claim 1, wherein an embedding movement direction of the locking body is perpendicular to an axial direction of the rotating shaft.

3. The rotary collapsing structure according to claim 1, wherein in the collapsed state, the elastic force always imparts the locking body with a tendency of movement in a radial direction of the rotating shaft.

4. The rotary collapsing structure according to any one of claims 1 to 3, wherein in the collapsed state, the first constraint portion and the second constraint portion are staggered; during switching from the collapsed state to the unfolded state, the locking body is continuously crimped to the outer circumferential surface of the first rotating member or the second rotating member by the elastic force; when the first rotating member and the second rotating member rotate relative to each other to a predetermined angle, spatial positions of the first constraint portion and the second constraint portion are aligned, to automatically form the circumferentially closed constraint hole; and the locking body is driven by the elastic force to be embedded into the constraint hole and forms the circumferential interference with the inner wall of the constraint hole, to complete rotary locking.

5. The rotary collapsing structure according to any one of claims 1 to 3, wherein in the unfolded state, the first constraint portion and the second constraint portion are spatially coaxial; during switching from the unfolded state to the collapsed state, a radial external unlocking force is applied to the locking body, to counteract the elastic force and detach the locking body from the constraint hole; the first rotating member and the second rotating member obtain a degree of freedom of relative rotation around the rotating shaft; in a relative rotation process, the first constraint portion and the second constraint portion are spatially staggered, causing the external unlocking force on the constraint hole to disappear; after the external unlocking force is removed, the locking body is driven by the elastic force to abut against the outer circumferential surface of the first rotating member or the second rotating member, to maintain a non-interference state.

6. A rotary collapsing structure, comprising: a first rotating disk comprising a first rotating contact surface and a first limiting slot formed in the first rotating contact surface; a second rotating disk comprising a second rotating contact surface opposite to the first rotating contact surface and a second limiting slot formed in the second rotating contact surface; a pin shaft connecting the first rotating disk with the second rotating disk to implement relative rotation between the first rotating disk and the second rotating disk; a locking assembly comprising a locking pin, an elastic member, and a locking limiting portion arranged at an end portion of the locking pin, wherein the first rotating disk and the second rotating disk have first positions and second positions that are opposite to each other; in the first positions, the first limiting slot and the second limiting slot are spatially coaxial to form a circumferentially closed limiting hole, and under action of an elastic force of the elastic member, the locking limiting portion extends into the limiting hole and forms circumferential interference with an inner wall of the limiting hole to prevent relative rotation of the rotating disks; and in the second positions, the locking limiting portion is detached from the limiting hole, the first rotating contact surface and the second rotating contact surface rotate relative to each other around the pin shaft, and when reset, the locking limiting portion abuts against an outer circumferential surface of the first rotating disk or the second rotating disk.

7. The rotary collapsing structure according to claim 6, wherein the first rotating disk is fixedly connected to the first rotating arm; the second rotating disk is fixedly connected to the second rotating arm; and the first positions and the second positions are determined based on a relative position between the first rotating arm and the second rotating arm.

8. The rotary collapsing structure according to claim 6 or 7, wherein after the locking limiting portion is detached from the limiting hole, an end portion of the locking limiting portion continuously abuts against the outer circumferential surface of the first rotating disk or the second rotating disk under the action of the elastic force of the elastic member.

9. The rotary collapsing structure according to claim 8, wherein the locking pin and the elastic member of the locking assembly are mounted in an inner cavity of the first rotating arm; the locking pin is suitable for being actuated by a triggering member that is movably mounted on an outer side of the first rotating arm; or, the locking pin and the elastic member of the locking assembly are mounted in an inner cavity of the second rotating arm; and the locking pin is suitable for being actuated by a triggering member that is movably mounted on an outer side of the second rotating arm.

10. The rotary collapsing structure according to claim 9, wherein the triggering member is located in an end-portion holding region of the first rotating arm or the second rotating arm; and the triggering member is configured to be triggered when a user holds the end-portion holding region to rotate the first rotating arm or the second rotating arm.

11. The rotary collapsing structure according to claim 10, wherein the triggering member is a sliding sleeve; and The sliding sleeve sleeves the first rotating arm or the second rotating arm, and is connected to the locking pin through a linkage pin.

12. The rotary collapsing structure according to claim 10, wherein the triggering member is a trigger; and One end of the trigger is hinged to the first rotating arm or the second rotating arm through a rotating pin, and another end extends from the inner cavity of the first rotating arm or the second rotating arm and is connected to the locking pin through a connecting piece.

13. A folding chair, comprising: the rotary collapsing structure according to any one of claims 1 to 12; front legs, rear legs, two front seat rods, and two back rods that are respectively plugged into the first rotating arm and the second rotating arm; a first tension cable, wherein one end of the first tension cable extends into the front legs and is connected to the front legs, and another end of the first tension cable extends into the front seat rods and is connected to the front seat rods; a second tension cable, wherein one end of the second tension cable extends into the rear legs and is connected to the rear legs, and another end of the second tension cable extends into the back rods and is connected to the back rods; and a chair seat, wherein four corners of the chair seat are respectively supported by the two front seat rods and the two back rods.

14. A storage box rack, comprising: the rotary collapsing structure according to any one of claims 1 to 12; supporting legs respectively plugged onto the first rotating arm and the second rotating arm; and supporting blocks arranged on surfaces of the first rotating arm and the second rotating arm, wherein the supporting blocks are suitable for placing a storage box.

15. A table, comprising: the rotary collapsing structure according to any one of claims 1 to 12; a lower supporting leg and an upper supporting rod that are respectively plugged onto the first rotating arm and the second rotating arm; a supporting assembly connected to the upper supporting rod; and a table board unit placed above the supporting assembly.

16. The table according to claim 15, wherein the supporting assembly comprises: a plug suitable for being plugged to an end portion of the upper supporting rod; a lower buckle plate mounted on the plug; and a table board supporting rod in buckling connection with the lower buckle plate.

17. The table according to claim 16, wherein an upper buckle plate is arranged at a bottom of the table board unit; the table board supporting rod supports the bottom of the table board unit; and the upper buckle plate and the lower buckle plate are respectively in buckling connection with the table board supporting rod.

Images