Connecting assembly, rear supporting frame and folding wheelchair

Abstract

The utility model provides a connecting assembly, a rear supporting frame and a folding wheelchair, relates to the technical field of medical instruments, and aims at solving the technical problems that after a folding wheelchair is folded, the overall size is large, the weight is large, and a user cannot carry and store the folding wheelchair conveniently. The connecting assembly comprises a first connecting piece and a second connecting piece. The first connecting piece comprises a first body and an inserting part, the inserting part is arranged at one end of the first body, and the first body is provided with a first positioning part; the second connecting piece comprises a second body and a second positioning part, the second body is provided with a mounting cavity and an insertion port communicated with the mounting cavity, and the second positioning part is close to the insertion port; the first positioning part is clamped to the second positioning part, and the first positioning part and the second positioning part rotate relatively; when the first connecting piece is rotated, the inserting part can be inserted into the mounting cavity. According to the folding wheelchair, the overall size and weight of the folding wheelchair can be reduced after the folding wheelchair is folded, and a user can conveniently carry and store the folding wheelchair.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and more specifically to a connecting assembly, a rear support frame and a folding wheelchair. Background Art

[0002] Folding wheelchairs are a means of transportation for special groups of people, such as the disabled, the elderly and the weak, as well as patients undergoing medical clinical rehabilitation. They are widely used because they can be folded, are easy to carry and take up little space.

[0003] The existing folding wheelchair includes a front support frame, a backrest frame, a rear support frame, a support connecting rod, a seat frame and a seat connecting rod, wherein the front support frame, the backrest frame, the rear support frame and the support connecting rod are hinged together to form a first link mechanism that can be folded and deformed to realize the folding of the front support frame, the backrest frame and the rear support frame. The front support frame, the seat connecting rod, the seat frame and the backrest frame form a second link mechanism that can be folded and deformed. When the first link mechanism is actuated, the second connecting mechanism can follow, thereby realizing that the seat frame can be folded along during the folding and unfolding process of the folding wheelchair.

[0004] However, the above-mentioned foldable wheelchair is relatively large in size and heavy in weight after being folded, and is inconvenient for users to carry and store. Utility Model Content

[0005] The purpose of the present application is to provide a connecting assembly, a rear support frame and a folding wheelchair, which can disassemble and assemble at least part of the folding wheelchair to reduce the overall volume and weight of the folding wheelchair after folding, so as to facilitate the user to carry and store it.

[0006] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0007] A first aspect of an embodiment of the present application provides a connection component, including a first connection member and a second connection member; the first connection member includes a first body and a plug-in portion, wherein the plug-in portion is arranged at one end of the first body, and the first body is provided with a first positioning portion; the second connection member includes a second body and a second positioning portion, the second body has an installation cavity and a plug-in interface connected thereto, and the second positioning portion is arranged close to the plug-in interface; the first positioning portion is snapped onto the second positioning portion, and the two rotate relative to each other; the first connection member is rotated, and the plug-in portion can be inserted into the installation cavity.

[0008] In an optional embodiment, the first positioning portion is disposed on one side of the plug-in portion, and the first positioning portion is located on a rotation path of the first connecting member.

[0009] In an optional embodiment, the first positioning portion is configured as an arc-shaped slot; and the second positioning portion is configured as a card axis disposed on the plug interface.

[0010] In an optional embodiment, the plug-in portion includes a plug-in end; along the insertion direction of the first connecting member, the plug-in end is located at the end of the plug-in portion; along the extension direction of the rotation axis of the first connecting member, at least one of the two side surfaces of the plug-in end has a first guide slope, and the width of the plug-in end in the extension direction of the rotation axis gradually decreases along the insertion direction.

[0011] In an optional embodiment, a limiting end surface is provided at the transition between the plug-in portion and the first body; the limiting end surface is configured to abut against an end surface of the plug interface when the plug-in portion is inserted into the installation cavity.

[0012] In an optional embodiment, a portion of the plug-in portion close to the limiting end face has a second guiding bevel; the second guiding bevel is configured so that when the plug-in portion is inserted into the mounting cavity, the limiting end face abuts against a front edge of the plug-in interface; and the front edge of the plug-in interface is arranged relative to the second positioning portion.

[0013] In an optional embodiment, the connecting component also includes a locking piece, which is used to lock the plug-in part and the second body; the plug-in part is provided with a first through hole passing through it; the second body is provided with a first plug-in hole connected to the installation cavity, and the plug-in part is inserted into the installation cavity; the locking piece is inserted into the first plug-in hole and the first through hole.

[0014] In an optional embodiment, the connecting assembly further includes a guide sleeve; the guide sleeve is embedded in the first through hole, and the locking member is inserted in the guide sleeve.

[0015] In an optional embodiment, the connecting assembly also includes a shock-absorbing spacer; the shock-absorbing spacer is embedded in the installation cavity and fits with part of the inner wall of the installation cavity; the plug-in portion is inserted in the shock-absorbing spacer, and the shock-absorbing spacer is provided with a second plug-in hole coaxial with the first plug-in hole.

[0016] In an optional embodiment, the locking member is configured as a lock spring pin.

[0017] In an optional embodiment, the first body is provided with a plurality of first snap-on connectors, which are arranged opposite to the plug-in portion; the second body is provided with a plurality of second snap-on connectors, which are arranged opposite to the plug-in port.

[0018] The second aspect of an embodiment of the present application provides a rear support frame, comprising the connecting assembly described in the first aspect and at least two parts; the connecting assembly comprises a first connecting member and a second connecting member, and of the two adjacent parts, one part is connected to the first connecting member, and the other part is connected to the second connecting member.

[0019] A third aspect of an embodiment of the present application provides a folding wheelchair, comprising a rear wheel group and two rear support frames as described in the second aspect; along a first direction, the two rear support frames are symmetrically arranged on both sides of the folding wheelchair, and along a second direction, the rear support frame is arranged on the rear side of the folding wheelchair; the rear wheel group comprises two rear wheels, and each rear support frame is respectively connected to one of the rear wheels.

[0020] Compared with the related art, the connection assembly, rear support frame and folding wheelchair provided in the embodiments of the present application have the following advantages:

[0021] The connection assembly provided in the embodiment of the present application includes a pluggable first connection member and a second connection member, and further divides the rear support frame into at least two parts, one of which is connected to the first connection member and the other is connected to the second connection member, so that the rear support frame can be disassembled and then assembled together using the connection assembly. Furthermore, the first connection member and the second connection member can be positioned by the first positioning portion and the second positioning portion to quickly achieve plug-in connection.

[0022] In the related art, the rear support is usually configured as an integrated structure, and the above-mentioned foldable wheelchair has a large overall volume and weight after being folded, which is inconvenient for users to carry and store. However, in the embodiment of the present application, it can be divided into several parts based on the connecting components, and assembled together through the connecting components to reduce the overall volume and weight of the foldable wheelchair after being folded, so as to facilitate users to carry and store.

[0023] In addition to the technical problems solved by the embodiments of the present disclosure described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the connecting assembly, rear support frame and folding wheelchair provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a foldable wheelchair in an unfolded state provided in an embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of the mechanism of the foldable wheelchair in the embodiment of the present application in the unfolded state;

[0026] Figure 3 This is a structural schematic diagram of a foldable wheelchair in a folded state according to an embodiment of the present application;

[0027] Figure 4 A schematic diagram of the mechanism of the foldable wheelchair provided in an embodiment of the present application in a folded state;

[0028] Figure 5 A schematic diagram of the arrangement of the connection assembly provided in an embodiment of the present application on the rear support frame;

[0029] Figure 6 A schematic diagram of the structure of the connection assembly provided in an embodiment of the present application;

[0030] Figure 7 An exploded schematic diagram of a connection assembly provided in an embodiment of the present application;

[0031] Figure 8 An isometric view of a first connecting member provided in an embodiment of the present application;

[0032] Fig. 9 A side view of a first connecting member provided in an embodiment of the present application Figure 1 ;

[0033] Fig.10 A side view of a first connecting member provided in an embodiment of the present application Figure 2 ;

[0034] Fig.11 A schematic diagram of the structure of a second connecting member provided in an embodiment of the present application;

[0035] Fig.12 Schematic diagram of the process of inserting the first connector and the second connector provided in the embodiment of the present application Figure 1 ;

[0036] Fig.13 Schematic diagram of the process of inserting the first connector and the second connector provided in the embodiment of the present application Figure 1 .

[0037] Description of reference numerals:

[0038] 10-Front support frame;

[0039] 20-backrest support;

[0040] 30- rear support frame;

[0041] 31-Part 1; 32-Part 2;

[0042] 40-bracket connecting rod;

[0043] 50-seat link;

[0044] 60-seat support;

[0045] 70-connection components;

[0046] 71- first connecting member;

[0047] 711-First ontology;

[0048] 7111-first positioning portion; 7112-limiting end surface;

[0049] 712-plug-in part;

[0050] 7121 - first guiding slope; 7122 - second guiding slope; 7123 - first through hole;

[0051] 713-first snap connector;

[0052] 72- second connecting member;

[0053] 721-Second body;

[0054] 7211-installation cavity; 7212-plug interface; 7213-second positioning portion; 7214-first plug hole;

[0055] 722-second snap connector;

[0056] 73-locking member;

[0057] 74-guide sleeve;

[0058] 75- shock-absorbing spacer;

[0059] 751-second plug-in hole;

[0060] 100-Folding wheelchair. DETAILED DESCRIPTION

[0061] As described in the background art, after the folding wheelchair is folded, its overall volume and weight are large, which is not convenient for users to carry and store. The inventors have found that the reason for this problem is that the rear support is usually configured as an integrated structure, and the rear support frame is connected to the rear wheels, which has a large volume and weight, resulting in the overall volume and weight of the folding wheelchair being large after folding, which is not convenient for users to carry and store.

[0062] In response to the above technical problems, an embodiment of the present application provides a folding wheelchair, which disassembles a frame, a backrest bracket, etc. into several parts, and then quickly connects the parts through a connecting assembly to reduce the overall volume and weight of the folding wheelchair after folding, so as to facilitate users to carry and store it.

[0063] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0064] To facilitate the description of the embodiments of the present application, the coordinate system shown in the accompanying drawings is first described, wherein the X-axis direction is a first direction, which may be the left or right direction of the folding wheelchair; the Y-axis direction is a second direction, which may be the front or rear direction of the folding wheelchair; and the Z-axis direction is a third direction, which is the height direction of the folding wheelchair.

[0065] like Figures 1 to 4 As shown, the folding wheelchair 100 provided in the embodiment of the present application includes a backrest bracket 20 and a frame, wherein the frame includes a front support frame 10, a rear support frame 30, a support connecting rod 40, a seat support 60 and a seat connecting rod 50, etc. The front support frame 10, the backrest bracket 20, the rear support frame 30 and the support connecting rod 40 are hinged together to form a first connecting rod mechanism that can be folded and deformed.

[0066] The front support frame 10, the backrest support 20, the seat support 60, and the seat connecting rod 50 are hinged together to form a second connecting rod mechanism that can be folded and deformed, and the second connecting rod mechanism is linked with the first connecting rod mechanism to realize that the seat support 60 is folded or unfolded when the folding wheelchair 100 is unfolded or folded.

[0067] Specifically, in the embodiment of the present application, the front support frame 10 is used to install the front wheel set, also called the front wheel bracket, and the rear support frame 30 is used to install the rear wheel set, also called the rear wheel bracket. The backrest bracket 20 includes a first mounting portion and a second mounting portion, and the first mounting portion is used to install the backrest cushion of the folding wheelchair 100, and the second mounting portion is used to connect with the front support frame 10, the seat bracket 60, and the rear support frame 30.

[0068] One end of the front support frame 10 away from the front wheel group and one end of the rear support frame 30 away from the rear wheel group can be rotatably connected to the second mounting portion of the backrest bracket 20 respectively, and can rotate relative to the backrest bracket 20, that is, the front support frame 10 and the rear support frame 30 are both hinged on the backrest bracket 20, and can rotate relative to the backrest bracket 20 respectively.

[0069] A support link 40 is provided between the rear support frame 30 and the front support frame 10, and the two ends of the support link 40 are respectively hinged to the rear support frame 30 and the front support frame 10, that is, the front support frame 10, the backrest support 20, the rear support frame 30, and the support link 40 are rotatably connected to each other and form pivot points a, b, c, and d to form a foldable and deformable first link mechanism to achieve the folding of the front support frame 10, the rear support frame 30, and the backrest support 20 of the folding wheelchair 100. When the folding wheelchair 100 is in the unfolded state, the backrest support 20 and the rear support frame 30 limit and support each other, thereby forming a stable triangular structure of pivot points a, c, and d.

[0070] The above-mentioned seat connecting rod 50 is used to connect the seat bracket 60 and the front support frame 10, wherein one end of the seat connecting rod 50 is hinged to the seat bracket 60, and the other end of the seat connecting rod 50 is hinged to the front support frame 10, that is, the front support frame 10, the seat connecting rod 50, the seat bracket 60, and the backrest bracket 20 are hinged to each other and form a pivot point e, f, g, a to form a second connecting rod mechanism that can be folded and deformed, so as to realize the follow-up folding of the seat bracket 60 during the folding and unfolding process of the folding wheelchair 100.

[0071] It should be noted that the folding wheelchair 100 in the embodiment of the present application includes two front support frames 10 and two rear support frames 30. Along the first direction, the two front support frames 10 are symmetrically arranged on the left and right sides of the folding wheelchair 100, and along the second direction, the front support frames 10 are arranged on the front side of the folding wheelchair 100. The front wheel group may include two front wheels, and each front support frame 10 is connected to one front wheel.

[0072] Correspondingly, along the first direction, the two rear support frames 30 are symmetrically arranged on the left and right sides of the folding wheelchair 100, and along the second direction, the rear support frame 30 is arranged on the rear side of the folding wheelchair 100. The rear wheel group may include two rear wheels, and each rear support frame 30 is connected to a rear wheel.

[0073] Since the rear support frame 30 is relatively large in size and weight, and the rear support frame 30 is also connected to the rear wheels, the entire folding wheelchair 100 is relatively large in size and weight after being folded, which is inconvenient for the user to carry and store.

[0074] To this end, the embodiment of the present application can divide the rear support frame 30 into at least two parts, and the two adjacent parts are connected together by a connecting assembly 70. The connecting assembly 70 includes a first connecting member 71 and a second connecting member 72. In the two adjacent parts, the first connecting member 71 is connected to one part, and the second connecting member 72 is connected to the other part.

[0075] like Figures 5 to 7As shown, the rear support frame 30 is disposed between the frame and the rear wheel, wherein one end of the rear support frame 30 is rotatably connected to the seat bracket 60, and the other end of the rear support frame 30 is rotatably connected to the rear wheel. For example, the rear support frame 30 includes a first portion 31 and a second portion 32, wherein one end of the first portion 31 is rotatably connected to the frame, and the other end of the first portion 31 is connected to the first connecting member 71; one end of the second portion 32 is rotatably connected to the rear wheel, and the other end of the second portion 32 is connected to the second connecting member 72.

[0076] Furthermore, the first connecting member 71 is inserted into the second connecting member 72 and fixed; that is, the first part 31 and the second part 32 of the rear support frame 30 are detachably connected together through the connecting assembly 70. Figure 8 As shown, the first connecting member 71 includes a first body 711 and a plug-in portion 712 , wherein one end of the first body 711 is used to connect with the first portion 31 .

[0077] For example, the first connector 71 is inserted into the first portion 31 and fixed by snapping. One end of the first body 711 is provided with a plurality of first snap connectors 713 and is connected to the first portion 31 by the first snap connectors 713 .

[0078] The plug-in portion 712 is disposed at the other end of the first body 711, and the plug-in portion 712 is disposed opposite to the first buckle connector 713, and the plug-in portion 712 can be plugged into the second connector 72. The first body 711 is also provided with a first positioning portion 7111, and the first positioning portion 7111 is disposed close to the plug-in portion 712, so that when the plug-in portion 712 is plugged into the second connector 72, the plug-in portion 712 can be positioned.

[0079] like Fig.11 As shown, the second connector 72 provided in the embodiment of the present application includes a second body 721 and a second positioning portion 7213, wherein the second body 721 is used to connect with the plug-in portion 712, one end of the second body 721 has a mounting cavity 7211 and a plug-in port 7212 communicating therewith, and the plug-in portion 712 is inserted into the mounting cavity 7211. A plurality of second snap connectors 722 are disposed at the other end of the second body 721, and the second snap connectors 722 are disposed opposite to the plug-in port 7212, and the second body 721 is connected to the second portion 32 of the rear support frame 30 through the second snap connectors 722.

[0080] The second body 721 is also provided with a second positioning portion 7213 near the plug interface 7212, and the second positioning portion 7213 is provided in cooperation with the first positioning portion 7111, and the first positioning portion 7111 and the second positioning portion 7213 are engaged and rotated relative to each other. By rotating the first connector 71, the plug-in portion 712 can be inserted into the installation cavity 7211 through the plug interface 7212.

[0081] like Fig.12 and Fig.13 As shown, when the plug-in portion 712 is plugged into the installation cavity 7211 , a locking member 73 may be inserted between the plug-in portion 712 and the second body 721 to connect the plug-in portion 712 and the second body 721 together to prevent the first connector 71 and the second connector 72 from falling out.

[0082] For example, the extension direction of the rotation axis L of the first connecting member 71 and the second connecting member 72 is consistent with the first direction, and the first connecting member 71 rotates forward and backward along the second direction; the insertion direction of the locking member 73 is consistent with the first direction; the locking member 73 can be a locking spring pin or a connecting bolt, etc., and the embodiments of the present application are not limited to this.

[0083] The connection assembly 70 provided in the embodiment of the present application is provided with a pluggable first connection member 71 and a second connection member 72, which are further locked by a locking member 73, so that the separated parts of the rear support frame 30 can be assembled together. Furthermore, the first connection member 71 and the second connection member 72 can be positioned by the first positioning portion 7111 and the second positioning portion 7213 to quickly achieve plug-in connection.

[0084] In the related art, the rear support member is usually configured as an integrated structure, and the above-mentioned folding wheelchair has a large overall volume and weight after being folded, which is inconvenient for users to carry and store. However, in the embodiment of the present application, the rear support frame 30 can be divided into several parts based on the connecting assembly 70, and assembled together through the connecting assembly 70, so as to reduce the overall volume and weight of the folding wheelchair 100 after being folded, so as to facilitate users to carry and store.

[0085] It should be noted that the connecting component 70 provided in the embodiment of the present application can be applied not only to the rear support frame 30, but also to the backrest bracket 20 as needed, that is, the backrest bracket 20 is split into several parts based on the connecting component 70, and the several parts of the backrest bracket 20 are assembled together through the connecting component 70. Such a configuration can reduce the overall volume and weight of the folding wheelchair 100 after folding, so as to facilitate the user to carry and store it.

[0086] Continue reading Figure 8 In the embodiment of the present application, the first positioning portion 7111 is disposed on one side of the plug-in portion 712, and the first positioning portion 7111 is located on the rotation path of the first connecting member 71. For example, the first positioning portion 7111 is configured as an arc-shaped slot, which extends along the first direction and runs through the entire first body 711, with one side of the arc-shaped slot extending to the left side of the first body 711, and the other side of the arc-shaped slot extending to the right side of the first body 711.

[0087] Continue reading Fig.11 and Fig.12 , the second positioning portion 7213 is configured as a card shaft disposed at the plug interface 7212, and the card shaft extends along the first direction. The plug interface 7212 includes a front edge and a rear edge disposed opposite to each other along the second direction, and the card shaft is installed at the rear edge of the plug interface 7212. When the plug-in portion 712 is inserted into the plug interface 7212, the card shaft is located at the rear side of the plug-in portion 712 along the second direction. For example, when the first connector 71 and the second connector 72 are inserted, the arc-shaped card groove is connected to the card shaft, and the first connector 71 is rotated so that the first connector 71 rotates relative to the second connector 72, and the plug-in portion 712 can be inserted into the installation cavity 7211.

[0088] like Fig. 9 and Fig.10 As shown, in the embodiment of the present application, the plug-in portion 712 includes a plug-in end. Along the plug-in direction of the first connecting member 71, the plug-in end is located at the end of the plug-in portion 712, that is, the plug-in end is located at the front end of the plug-in portion 712. During plug-in, the front end of the plug-in portion 712 enters the installation cavity 7211 before the first body 711.

[0089] Furthermore, along the extension direction of the rotation axis L of the first connecting member 71, the plug-in end includes two side surfaces that are arranged opposite to each other, at least one of the two side surfaces has a first guiding slope 7121, and the width of the plug-in end in the extension direction of the rotation axis L gradually decreases along the insertion direction.

[0090] Exemplarily, along the extension direction of the rotation axis L of the first connecting member 71, the plug-in end includes a first side surface and a second side surface that are oppositely arranged, and one of the first side surface and / or the second side surface is provided with a first guide slope 7121, and the first guide slope 7121 gradually inclines toward the middle along the plug-in direction, so that the width (thickness) of the plug-in end in the extension direction of the rotation axis L gradually decreases along the plug-in direction.

[0091] With such arrangement, when there is misalignment between the plug-in end and the plug-in port 7212 along the extending direction of the rotation axis L, the first guiding inclined surface 7121 can be used to guide the plug-in end so that the plug-in end can be quickly inserted into the installation cavity 7211 .

[0092] Furthermore, one end of the plug-in portion 712 away from the plug-in end is connected to the first body 711, and a limiting end surface 7112 is provided at the transition between the first body 711 and the plug-in portion 712, and the limiting end surface 7112 can be arranged around the plug-in portion 712. When the plug-in portion 712 is inserted into the installation cavity 7211 and installed in place, the limiting end surface 7112 abuts against the end surface of the plug interface 7212 to limit the plug-in portion 712.

[0093] On the basis of the above-mentioned embodiment, the plug-in portion 712 in the embodiment of the present application is further provided with a second guide bevel 7122, which is located at the portion of the plug-in portion 712 close to the limiting end surface 7112, and along the extension direction of the rotation axis L, the second guide bevel 7122 is located between the above-mentioned first side surface and the second side surface.

[0094] When the plug-in portion 712 is inserted, the second guide slope 7122 is opposite to the front edge of the plug-in interface 7212. During the insertion process, the second guide slope 7122 can abut against the front edge of the plug-in interface 7212. In this way, under the action of the insertion force of the plug-in portion 712, the second guide slope 7122 guides the plug-in end of the plug-in portion 712 to gradually enter the plug-in interface 7212, and the plug-in end can be completely inserted into the installation cavity 7211. In this state, the limiting end surface 7112 abuts against the end surface of the plug-in interface 7212, and the transition of the limiting end surface 7112 fits against the side wall of the plug-in interface 7212.

[0095] When the plug-in portion 712 is completely inserted into the installation cavity 7211 of the second body 721, a locking member 73 needs to be inserted between the plug-in portion 712 and the second body 721 to lock the first connecting member 71 and the second connecting member 72 to prevent the first connecting member 71 and the second connecting member 72 from detaching.

[0096] Exemplarily, the plug-in portion 712 is provided with a first through hole 7123 passing therethrough, and an extension direction of the first through hole 7123 is consistent with an extension direction of the rotation axis L of the first connecting member 71 . In other words, the extension direction of the first through hole 7123 is the same as an extension direction of the clamping shaft.

[0097] Correspondingly, the second body 721 is provided with a first plug-in hole 7214, which is connected to the installation cavity 7211, and the first plug-in hole 7214 is configured so that when the plug-in part 712 is inserted into place, the axis of the first plug-in hole 7214 coincides with the axis of the first through hole 7123, and the locking piece 73 can be inserted into the first plug-in hole 7214 and the first through hole 7123 to achieve locking of the second body 721 and the plug-in part 712.

[0098] Continue reading Figure 6 and Figure 7 The connection assembly 70 provided in the embodiment of the present application further includes a guide sleeve 74, which can be a copper sleeve. The guide sleeve 74 is embedded in the first through hole 7123, and the locking member 73 can be inserted in the guide sleeve 74. This arrangement can prevent the locking member 73 from causing wear to the first body 711, reduce the insertion clearance of the locking member 73, thereby reducing shaking, and making the connection between the first connecting member 71 and the second connecting member 72 more reliable.

[0099] Furthermore, the connection assembly 70 of the embodiment of the present application further includes a shock-absorbing spacer 75 , which can be a nylon spacer. The shock-absorbing spacer 75 is embedded in the installation cavity 7211 , and the side wall of the shock-absorbing spacer 75 can fit with part of the inner wall of the installation cavity 7211 .

[0100] It is understandable that the installation cavity 7211 of the second body 721 and the plug-in port 7212 connected to the installation cavity 7211 can be integrated in the shock-absorbing spacer 75, that is, the shock-absorbing spacer 75 cooperates with the plug-in portion 712, and the plug-in portion 712 can be inserted in the shock-absorbing spacer 75.

[0101] Furthermore, the side wall of the shock-absorbing spacer 75 is provided with a second plug hole 751 that matches the first plug hole 7214. The second plug hole 751 is coaxial with the first plug hole 7214, that is, when the plug-in portion 712 is installed in the shock-absorbing spacer 75, the locking member 73 can pass through the first plug hole 7214 and the second plug hole 751, and be inserted into the guide sleeve 74, thereby realizing the detachable installation of the first connecting member 71 and the second connecting member 72. In this way, the shock-absorbing spacer 75 is arranged in the installation cavity 7211 of the second body 721, which can effectively absorb vibration, reduce the matching gap between the plug-in portion 712 and the installation cavity 7211, thereby reducing shaking and noise, and improving user experience.

[0102] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0103] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0104] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0105] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A connection assembly, characterized in that: comprising a first connecting member and a second connecting member; The first connecting member includes a first body and a plug-in portion, wherein the plug-in portion is arranged at one end of the first body, and the first body is provided with a first positioning portion; The second connecting member includes a second body and a second positioning portion, the second body has a mounting cavity and an insertion port communicating therewith, and the second positioning portion is disposed close to the insertion port; The first positioning portion is clamped to the second positioning portion, and the two are relatively rotated; the first connecting member is rotated, and the plug-in portion can be inserted into the installation cavity.

2. The connection assembly according to claim 1, characterized in that: The first positioning portion is arranged at one side of the plug-in portion, and the first positioning portion is located on a rotation path of the first connecting member.

3. The connection assembly according to claim 2, characterized in that: The first positioning portion is configured as an arc-shaped slot; The second positioning portion is configured as a card axis disposed on the plug interface.

4. The connection assembly according to claim 1, characterized in that: The plug-in portion includes a plug-in end; Along the insertion direction of the first connector, the plug-in end is located at the end of the plug-in portion; Along the extension direction of the rotation axis of the first connecting member, at least one of the two side surfaces of the plug-in end has a first guiding slope, and the width of the plug-in end in the extension direction of the rotation axis gradually decreases along the insertion direction.

5. The connection assembly according to claim 4, characterized in that: A limited end surface is provided at the transition between the plug-in portion and the first body; The limiting end surface is configured such that when the plug-in portion is inserted into the installation cavity, the limiting end surface abuts against an end surface of the plug-in port.

6. The connection assembly according to claim 5, characterized in that: The portion of the plug-in portion close to the limiting end surface has a second guiding inclined surface; The second guiding inclined surface is configured so that when the plug-in portion is inserted into the installation cavity, the limiting end surface abuts against the front edge of the plug-in port; The front edge of the plug port is arranged opposite to the second positioning portion.

7. The connection assembly according to any one of claims 1 to 6, characterized in that: The connecting assembly further comprises a locking member, and the locking member is used to lock the plug-in portion and the second body; The plug-in portion is provided with a first through hole penetrating therethrough; the second body is provided with a first plug-in hole communicating with the installation cavity, and the plug-in portion is inserted into the installation cavity; The locking member is inserted into the first inserting hole and the first through hole.

8. The connection assembly according to claim 7, characterized in that: The connecting assembly also includes a guide sleeve; The guide sleeve is embedded in the first through hole, and the locking piece is inserted in the guide sleeve.

9. The connection assembly according to claim 7, characterized in that: The connecting assembly also includes a shock-absorbing spacer; The shock-absorbing spacer is embedded in the installation cavity and fits with part of the inner wall of the installation cavity; The plug-in portion is inserted into the shock-absorbing spacer, and the shock-absorbing spacer is provided with a second plug-in hole coaxial with the first plug-in hole.

10. The connection assembly according to claim 7, characterized in that: The locking element is configured as a lock spring pin.

11. The connection assembly according to claim 1, characterized in that The first body is provided with a plurality of first buckle connectors, and the first buckle connectors are arranged opposite to the plug-in portion; The second body is provided with a plurality of second snap-on connectors, and the second snap-on connectors are arranged opposite to the plug-in port.

12. A rear support frame, characterized in that: A connection assembly comprising any one of claims 1 to 11 and at least two parts; The connecting assembly includes a first connecting member and a second connecting member. Among the two adjacent parts, one part is connected to the first connecting member, and the other part is connected to the second connecting member.

13. A folding wheelchair, characterized in that: It comprises a rear wheel set and two rear support frames as claimed in claim 12; Along the first direction, the two rear support frames are symmetrically arranged on both sides of the folding wheelchair, and along the second direction, the rear support frame is arranged on the rear side of the folding wheelchair; The rear wheel group includes two rear wheels, and each rear support frame is connected to one of the rear wheels respectively.

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