CN115461026B - Folding wheelchair - Google Patents
Folding wheelchair Download PDFInfo
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- CN115461026B CN115461026B CN202280002598.0A CN202280002598A CN115461026B CN 115461026 B CN115461026 B CN 115461026B CN 202280002598 A CN202280002598 A CN 202280002598A CN 115461026 B CN115461026 B CN 115461026B
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- limiting
- support frame
- folding wheelchair
- backrest
- armrest
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
- A61G5/0808—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction
- A61G5/085—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding up and down, e.g. reducing or expanding the overall height of the wheelchair
- A61G5/0858—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding up and down, e.g. reducing or expanding the overall height of the wheelchair comprising a scissor-type frame, e.g. having pivoting cross bars for enabling folding
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Carriages For Children, Sleds, And Other Hand-Operated Vehicles (AREA)
- Invalid Beds And Related Equipment (AREA)
Abstract
本申请提供一种折叠轮椅，涉及医疗器械技术领域，用于解决现有的折叠轮椅折叠、展开过程中，扶手无法联动，导致折叠、展开过程复杂的技术问题，该折叠轮椅包括前支撑架、靠背支架以及扶手；扶手、前支撑架相对靠背支架可转动，扶手设置有第一限位部和第二限位部；靠背支架设置有第一限位结构，前支撑架配置有第二限位结构；第一限位结构配置为对折叠轮椅进行折叠时，其能够与第二限位部抵接并联动；以及对折叠轮椅进行展开时，其能够与第一限位部抵接并联动。本申请提供的折叠轮椅进行折叠、展开时，扶手与靠背支架能够联动，无需对扶手进行预先折叠或者展开，从而简化折叠过程，提升用户体验。
The present application provides a folding wheelchair, which relates to the field of medical device technology and is used to solve the technical problem that the armrests cannot be linked during the folding and unfolding process of the existing folding wheelchair, resulting in a complicated folding and unfolding process. The folding wheelchair includes a front support frame, a backrest frame and an armrest; the armrest and the front support frame are rotatable relative to the backrest frame, and the armrest is provided with a first limiting portion and a second limiting portion; the backrest frame is provided with a first limiting structure, and the front support frame is provided with a second limiting structure; the first limiting structure is configured to abut and link with the second limiting portion when the folding wheelchair is folded; and to abut and link with the first limiting portion when the folding wheelchair is unfolded. When the folding wheelchair provided by the present application is folded and unfolded, the armrests and the backrest frame can be linked, and there is no need to fold or unfold the armrests in advance, thereby simplifying the folding process and improving the user experience.
Description
Technical Field
The application relates to the technical field of medical equipment, in particular to a folding wheelchair.
Background
The folding wheelchair is a riding-instead tool for special people such as disabled people, elderly people, medical clinical rehabilitation patients and the like, and is widely applied because of being foldable, portable and small in occupied space.
The existing folding wheelchair comprises a backrest bracket and two armrests, wherein the two armrests are respectively hinged to two sides of the backrest bracket, and the armrests can rotate relative to the backrest bracket. When a user takes the folding wheelchair, the armrests can be lifted upwards, so that the user can take the wheelchair conveniently.
However, in the folding and unfolding process of the folding wheelchair, the armrests cannot be linked, and the armrests need to be folded or unfolded in advance, so that the folding and unfolding processes are complex, and the user experience is affected.
Disclosure of Invention
The application aims to provide a folding wheelchair, when the folding wheelchair is folded, armrests are linked with a backrest bracket, and the armrests do not need to be folded in advance, so that the folding process of the whole folding wheelchair can be simplified, and the user experience is improved.
In order to achieve the above object, the embodiment of the present application provides the following technical solutions:
The folding wheelchair comprises a front support frame, a backrest support frame and armrests, wherein the armrests and the front support frame can rotate relative to the backrest support frame, the armrests are provided with a first limiting part and a second limiting part, the backrest support frame is provided with a first limiting structure, the front support frame is provided with a second limiting structure, the first limiting structure can be abutted and linked with the second limiting part when the folding wheelchair is folded, the first limiting structure can be abutted and linked with the first limiting part when the folding wheelchair is unfolded, the first limiting structure is abutted with the first limiting part when the folding wheelchair is in an unfolded state, and the second limiting structure is limited between the second limiting structure and the first limiting structure and is abutted with the second limiting structure respectively when the folding wheelchair is in a folded state.
In one possible implementation manner, the armrest is provided with a first limiting protrusion and a second limiting protrusion at intervals to form the first limiting portion and the second limiting portion, and the first limiting protrusion and the second limiting protrusion are located on one side, facing the backrest bracket, of the armrest and can be abutted against the first limiting structure.
In one possible implementation, the armrest and the front support bracket are connected to the backrest bracket in a common rotation manner, and the rotation axis of the armrest, the rotation axis of the front support bracket and the rotation axis of the backrest bracket are positioned on the same straight line.
In one possible implementation manner, the first limiting protrusion and the second limiting protrusion are circumferentially spaced along the rotation axis of the armrest, the first limiting structure comprises a third limiting protrusion, the third limiting protrusion is located between the first limiting protrusion and the second limiting protrusion, the third limiting protrusion is configured to abut against the first limiting protrusion when the folding wheelchair is in an unfolded state, and abut against the second limiting protrusion when the folding wheelchair is in a folded state.
In one possible implementation manner, the armrest is L-shaped and comprises a bearing handle and a mounting handle, wherein the bearing handle is configured to provide support for a user, and the mounting handle is used for rotationally connecting the armrest to the backrest bracket;
and a third limiting block is arranged at the position, close to the rotation connection position, of the backrest bracket so as to form a third limiting protrusion.
In one possible implementation, the armrest is rotatably coupled to the front support bracket and defines a first axis of rotation, the front support bracket is rotatably coupled to the back support bracket and defines a second axis of rotation, and the second axis of rotation is non-collinear with the first axis of rotation.
In one possible implementation manner, the front support frame is fixedly provided with a rotating shaft block, the handrail is provided with a first rotating shaft hole matched with the rotating shaft block, the handrail is sleeved on the rotating shaft block through the first rotating shaft hole and rotates relative to the front support frame, the rotating shaft block is provided with an eccentric second rotating shaft hole, the backrest support frame is provided with a rotating shaft matched with the second rotating shaft hole, and the front support frame is sleeved on the rotating shaft through the second rotating shaft hole and rotates relative to the backrest support frame.
In one possible implementation manner, the first limiting structure comprises a fourth limiting protrusion and a fifth limiting protrusion which are arranged at intervals, the fourth limiting protrusion is configured to be abutted with the first limiting protrusion when the folding wheelchair is in an unfolding state, and the fifth limiting protrusion is configured to be abutted with the second limiting protrusion when the folding wheelchair is in a folding state.
In one possible implementation, the fourth limit projection or the first limit projection is provided with rounded structures facing each other, and the fifth limit projection or the second limit projection is provided with arcuate surfaces facing each other.
In one possible implementation manner, the fourth limiting protrusion is a fourth limiting block arranged on the backrest bracket, a round corner structure is arranged at an edge of the fourth limiting block, which faces the first limiting protrusion, the fifth limiting protrusion is a cylinder arranged on the backrest bracket, and the cylinder can slide on a limiting surface of the second limiting protrusion when being abutted with the second limiting protrusion.
In one possible implementation manner, the second limiting structure is a limiting surface of the front support frame, which is arranged towards the backrest support frame, and the limiting surface is configured to be abutted with the second limiting protrusion when the folding wheelchair is in a folded state.
In one possible implementation manner, the folding wheelchair further comprises a rear support frame, a support connecting rod, a seat support and a seat connecting rod, wherein the rear support frame is hinged to the backrest support, the support connecting rod is arranged between the rear support frame and the front support frame, two ends of the support connecting rod are respectively hinged to the rear support frame and the front support frame, the seat connecting rod is arranged between the seat support and the front support frame, one end of the seat connecting rod is hinged to the seat support, and the other end of the seat connecting rod is connected with the front support frame.
In one possible implementation manner, the backrest bracket and the rear supporting frame are provided with locking structures, the limiting structures comprise a first locking surface and a second locking surface, the backrest bracket is provided with a recess to form the first locking surface, one end, close to the backrest bracket, of the rear supporting frame is provided with a protrusion to form the second locking surface, the protrusion can be accommodated in the recess, and the first locking surface is abutted with the second locking surface.
In one possible implementation manner, the folding wheelchair further comprises a lock hook mechanism, the lock hook mechanism comprises a linkage rod and at least one lock hook, the lock hook is arranged at the end part of the linkage rod, the lock hook is rotatably connected to the backrest bracket, a torsion spring is arranged between the lock hook and the backrest bracket and used for providing locking force for the lock hook, the rear support frame is provided with a fixing pin matched with the lock hook, the lock hook is provided with a limiting groove matched with the fixing pin, and the lock hook is clamped to the fixing pin through the limiting groove.
In one possible implementation manner, the latch hook mechanism comprises two latch hooks, the two latch hooks are symmetrically arranged at two ends of the linkage rod, the latch hooks are provided with a spanner, the backrest bracket is provided with a positioning protrusion, and when the spanner is in abutting connection with the positioning protrusion, a limiting groove of the latch hook is clamped to the fixing pin.
In one possible implementation, the folding wheelchair further comprises a front wheel and a rear wheel, wherein the front wheel is mounted at one end of the front support frame far away from the backrest support frame, and the rear wheel is mounted at one end of the rear support frame far away from the backrest support frame.
Compared with the related art, the folding wheelchair provided by the embodiment of the application has the following advantages:
The folding wheelchair provided by the embodiment of the application comprises a front support frame and an armrest, wherein the front support frame and the armrest rotate relative to a backrest support respectively, the armrest is provided with a first limiting part and a second limiting part, the backrest support is provided with a first limiting structure for being abutted with the first limiting part and the second limiting part, the backrest support is abutted with the second limiting part through the first limiting structure in the folding process of the folding wheelchair so as to enable the backrest support and the first limiting part to be linked, and the backrest support is abutted with the first limiting part through the first limiting structure in the unfolding process of the folding wheelchair so as to achieve the linkage of the backrest support and the first limiting part.
Furthermore, when the folding wheelchair is in a folded state, the second limiting part can be limited between the first limiting structure and the second limiting structure, so that the armrests are limited between the backrest bracket and the front supporting frame, the armrests can be prevented from shaking, and the stability of the folding wheelchair in the folded state is improved.
Compared with the related technical scheme that the armrests cannot participate in linkage in the folding and unfolding processes of the folding wheelchair, and the armrests need to be folded in advance, so that the folding and unfolding processes are complex, the folding wheelchair provided by the embodiment of the application has the advantages that when being folded and unfolded, the armrests and the backrest support can be linked, and the armrests do not need to be folded or unfolded in advance, so that the folding process is simplified, and the user experience is improved.
In addition to the technical problems, technical features constituting the technical solutions, and beneficial effects caused by the technical features of the technical solutions described above in the embodiments of the present disclosure, other technical problems that can be solved by the folding wheelchair provided in the embodiments of the present disclosure, other technical features included in the technical solutions, and beneficial effects caused by the technical features will be described in further detail in the detailed description of the present disclosure.
Drawings
FIG. 1 is a schematic view of the overall structure of a folding wheelchair according to an embodiment of the present application;
FIG. 2 is a schematic view of a folding wheelchair according to an embodiment of the present application;
FIG. 3 is a schematic view of a folding wheelchair according to an embodiment of the present application;
FIG. 4 is an exploded view of a folding wheelchair according to an embodiment of the present application;
FIG. 5 is a schematic diagram of the mechanism of the folding wheelchair according to the embodiment of the present application;
fig. 6 is a schematic diagram of an arrangement of first and second limit protrusions of a handrail according to an embodiment of the present application;
fig. 7 is a schematic view of a first limiting structure provided in the backrest bracket according to an embodiment of the present application;
FIG. 8 is an enlarged schematic view of FIG. 7 at A;
Fig. 9 to 12 are schematic views illustrating a folding wheelchair according to an embodiment of the present application during folding and unfolding;
FIG. 13 is a schematic view of a connection between a armrest, a backrest support, and a front wheel support according to another embodiment of the present application;
Fig. 14 to 17 are schematic views illustrating a folding and unfolding process of a folding wheelchair according to another embodiment of the present application;
fig. 18 is a schematic layout view of a latch hook mechanism and a latch structure according to an embodiment of the present application;
Fig. 19 is a schematic diagram illustrating connection between a link lever and a latch hook in a latch hook mechanism according to an embodiment of the present application;
FIG. 20 is an enlarged view of the angle B in FIG. 18;
fig. 21 is another enlarged view of fig. 18 at B.
Reference numerals:
10-a front support frame;
11-front wheel, 12-second limit structure, 13-rotating shaft block, 131-second rotating shaft hole;
20-a backrest support;
21-a first locking surface, 22-a third limiting protrusion, 23-a fourth limiting protrusion, 24-a fifth limiting protrusion and 25-a rotating shaft;
30-a rear supporting frame;
31-rear wheel, 32-second locking surface, 33-fixing pin;
40-bracket connecting rod;
50-seat links;
60-a seat support;
70-armrests, 71-bearing handles, 72-mounting handles, 73-first limit protrusions, 74-second limit protrusions, 75-first rotating shaft holes and 76-locking gaskets;
80-pedaling;
90-latch hook mechanism;
91-linkage rod, 92-latch hook, 921-spanner, 922-limit groove and 93-torsion spring.
Detailed Description
As described in the background art, the folding wheelchair of the related art has a problem that the folding and unfolding processes are complicated, which affects the user experience, and the inventor has found that the problem arises because the existing folding wheelchair includes a backrest frame and two armrests, wherein the two armrests are hinged to two sides of the backrest frame, respectively, and the armrests are rotatable relative to the backrest frame. When a user takes the folding wheelchair, the armrests can be lifted upwards, so that the user can take the wheelchair conveniently. However, in the folding and unfolding process of the folding wheelchair, the armrests cannot be linked, and the armrests need to be folded in advance.
In view of the above technical problems, an embodiment of the present application provides a folding wheelchair, including a front support frame and an armrest that rotate relative to a backrest support respectively, where the armrest has a first limit portion and a second limit portion, the backrest support is provided with a first limit structure that is used to abut against the first limit portion and the second limit portion, and in a folding process of the folding wheelchair (rotating the backrest support), the backrest support abuts against the second limit portion through the first limit structure, so that the two are linked. On the contrary, when the folding wheelchair is in the unfolding process, the backrest bracket is abutted with the first limiting part through the first limiting mechanism, and the backrest bracket and the first limiting part are linked.
By means of the arrangement, when the folding wheelchair provided by the embodiment of the application is folded and unfolded, the armrests and the backrest bracket can be linked, and the armrests do not need to be folded or unfolded in advance, so that the folding and unfolding processes are simplified, and the user experience is improved.
In order to make the above objects, features and advantages of the embodiments of the present application more comprehensible, the technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
As shown in fig. 1 to 5, the folding wheelchair provided by the embodiment of the application comprises a front support frame 10, a backrest support 20, armrests 70, front wheels 11, rear wheels 31, a rear support frame 30, support links 40, a seat support 60, a seat link 50 and pedals 80, wherein the front support frame 10, the backrest support 20, the rear support frame 30 and the support links 40 are hinged together to form a foldable and deformable first link mechanism.
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 which can be folded and deformed, and the second connecting rod mechanism is linked with the first connecting rod mechanism so as to realize the follow-up folding or unfolding of the seat support 60 in the whole folding wheelchair unfolding or folding process.
Specifically, the front support frame 10 is used for mounting a front wheel 11, also referred to as a front wheel bracket, and a pedal 80 is also mounted at the front end of the front support frame 10 to provide foot support for a user. The rear support bracket 30 is used for mounting a rear wheel 31, also referred to as a rear wheel bracket. The backrest bracket 20 comprises a first mounting portion and a second mounting portion, the first mounting portion is used for mounting a backrest cushion of the folding wheelchair, the second mounting portion is used for being connected with the front support frame 10, the seat bracket 60 and the rear support frame 30, one end of the front support frame 10 far away from the front wheel 11, one end of the rear support frame 30 far away from the rear wheel 31 can be respectively and rotatably connected to the second mounting portion of the backrest bracket 20, and the backrest bracket 20 can be rotated relatively.
A support connecting rod 40 is arranged between the rear support frame 30 and the front support frame 10, and two ends of the support connecting rod 40 are respectively hinged with the rear support frame 30 and the front support frame 10, namely, the front support frame 10, the backrest support 20, the rear support frame 30 and the support connecting rod 40 are mutually connected in a rotating way to form a rotating shaft point a, b, c, d so as to form a first connecting rod mechanism capable of being folded and deformed, so that the front support frame 10, the rear support frame 30 and the backrest support 20 of the folding wheelchair are folded. When the folding wheelchair is in an unfolding state, the backrest bracket 20 and the rear support bracket 30 are in limit support with each other, so that a stable triangle structure with rotating shaft points a, c and d is formed.
The seat connecting rod 50 is used for connecting the seat support 60 and the front support frame 10, wherein one end of the seat connecting rod 50 is hinged with the seat support 60, and the other end of the seat connecting rod 50 is hinged with the front support frame 10, namely, the front support frame 10, the seat connecting rod 50, the seat support 60 and the backrest support 20 are mutually hinged and form a rotating shaft point e, f, g, a, so as to form a foldable and deformable second connecting rod mechanism, and realize follow-up folding of the seat support 60 in the folding and unfolding processes of the folding wheelchair.
The folding wheelchair provided by the embodiment of the application further comprises armrests 70 arranged at two sides of the backrest bracket 20, and the armrests 70 can rotate relative to the backrest bracket 20. For example, the armrest 70 may be rotatably coupled to the back bracket 20, or the armrest 70 may be rotatably coupled to the front support bracket 10 and the front support bracket 10 may be rotatably coupled to the back bracket 20. The armrests 70 may be lifted upward by a user to facilitate a user's seating while the wheelchair is folded up and down, and the armrests 70 may provide support for the user to enhance the use experience while the user is seated in the wheelchair.
Further, the armrest 70 is provided with a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion are both located on an inner side surface of the armrest 70 facing the backrest bracket 20, the backrest bracket 20 is provided with a first limiting structure, the first limiting structure can be abutted with the first limiting portion and the second limiting portion, it should be noted that the first limiting portion and the second limiting portion can be limiting protrusions or other limiting members formed on the armrest 70 respectively, and the first limiting structure at least comprises one limiting protrusion formed on the backrest bracket 20.
Illustratively, the back rest bracket 20 may be provided with one or two limit projections. For example, the armrest 70 is provided with two spacing protrusions, the backrest bracket 20 is provided with one spacing protrusion, and the spacing protrusion on the backrest bracket 20 may be located between the two spacing protrusions of the armrest and on a rotational path formed by the two spacing protrusions of the armrest 70.
Or the armrest 70 is provided with two spacing protrusions arranged at intervals, the backrest bracket 20 is also provided with two spacing protrusions, the spacing protrusions on the backrest bracket 20 are not positioned on a rotating path formed by the two spacing protrusions of the armrest, and only the spacing protrusions on the armrest 70 are matched with the spacing protrusions on the backrest bracket 20, so that the armrest 70 can be linked with the backrest bracket 20 in the folding and unfolding processes of the folding wheelchair.
Referring to fig. 9 to 12, when the back support 20 is rotated counterclockwise to fold the folding wheelchair, that is, in the process of converting the unfolded state of the folding wheelchair from fig. 9 to the folded state of fig. 12, the first limiting structure of the back support 20 (the first limiting structure includes a limiting protrusion in the embodiment shown in this drawing) is gradually separated from the first limiting portion, as shown in fig. 10. When the backrest bracket 20 rotates to a certain angle, the first limiting structure can abut against the second limiting part and drive the armrest 70 to rotate together, that is, during the folding process of the folding wheelchair, the armrest 70 can be linked with the backrest bracket 20, as shown in fig. 11.
The front support frame 10 is provided with a second limiting structure 12, and the second limiting structure 12 is configured such that it can abut against the second limiting portion when the folding wheelchair is in a folded state. When the first limiting structure of the backrest bracket 20 abuts against the second limiting structure, the backrest bracket 20 continues to rotate anticlockwise, so that the second limiting structure is limited between the first limiting structure and the second limiting structure 12, thereby limiting the armrest 70 and preventing the armrest 70 from shaking, so as to improve the stability of the folding wheelchair in a folded state, as shown in fig. 12.
On the contrary, when the folding wheelchair is unfolded, the first limiting structure can be abutted with the first limiting part and drive the armrest 70 to link.
Specifically, when the folding wheelchair is unfolded, that is, a process of the folding wheelchair transitioning from the folded state shown in fig. 12 to the unfolded state shown in fig. 9. The first previous support frame 10 and the backrest support frame 20 rotate reversely (rotate clockwise), and the second limiting structure 12 of the front support frame 10 is gradually far away from the first limiting structure of the backrest support frame 20, and in this process, due to the action of the gravity or the assembly damping of the armrest 70, the armrest 70 does not rotate clockwise against the gravity, and at this time, the second limiting part of the armrest 70 keeps fitting with the second limiting structure 12 of the front support frame 10.
Along with the rotation of the backrest support 20 continued clockwise, the first limiting structure can be abutted with the first limiting part, so that linkage between the armrest 70 and the backrest support 20 is realized, the armrest 70 is driven to rotate clockwise, and when the backrest support 20 rotates in place, the backrest support 20 and the rear support 30 are in limiting support with each other, so that a stable triangular structure with rotating shaft points a, c and d is formed.
At the same time, the armrest 70 is also unfolded in place, and the first limiting portion is held in abutment with the first limiting structure, so that the armrest 70 can be prevented from rotating counterclockwise, that is, the armrest 70 is prevented from being folded by an external force, thereby improving the supporting reliability of the armrest 70. It should be noted that, the armrest 70 may continue to rotate clockwise, so that the armrest 70 may be folded upwards, which is convenient for a user to lift the armrest 70 upwards when folding the wheelchair up and down.
Compared with the related technical scheme that the armrests 70 cannot participate in linkage in the folding and unfolding processes of the folding wheelchair, and the armrests 70 need to be folded in advance, so that the folding process is complex, the folding wheelchair provided by the embodiment of the application has the advantages that the armrests 70 and the backrest support 20 can be linked, and the armrests 70 do not need to be folded or unfolded in advance, so that the folding process is simplified, and the user experience is improved.
Furthermore, when the folding wheelchair is in a folded state, the second limiting portion can be limited between the first limiting structure and the second limiting structure 12, so that the armrest 70 is limited between the backrest bracket 20 and the front support frame 10, shaking of the armrest 70 can be avoided, and stability of the folding wheelchair in a folded state is improved.
As shown in fig. 6, on the basis of the above embodiment, the armrest 70 may be provided with a first limiting protrusion 73 and a second limiting protrusion 74 at intervals, where the first limiting protrusion 73 and the second limiting protrusion 74 may protrude from a portion of the armrest 70 facing the backrest bracket 20 toward the backrest bracket 20 to form a first limiting portion and a second limiting portion, that is, the first limiting protrusion 73 and the second limiting protrusion 74 and the armrest 70 are in an integral structure. Further, the second limit protrusion 74 can abut with the first limit structure when the folding wheelchair is in the folded state, and the first limit protrusion 73 can abut with the first limit structure when the folding wheelchair is in the unfolded state.
The armrest 70 and the front support frame 10 in the embodiment of the present application can rotate relative to the backrest frame 20, and according to the rotational connection scheme between the three, the structure of the first limit structure of the backrest frame 20 and the matching scheme of the first limit structure and the first limit protrusion 73 and the second limit protrusion 74 of the armrest 70 can be described.
In one embodiment, the armrest 70 and the front support frame 10 are coaxially rotatably connected to the backrest frame 20, for example, the armrest 70 and the front support frame 10 are rotatably connected together on a rotation axis and rotatably connected to the backrest frame 20 via the rotation axis, that is, the rotation axis of the armrest 70, the rotation axis of the front support frame 10 and the rotation axis of the backrest frame 20 are all on the same line.
On the basis that the armrest 70 and the front support frame 10 are connected to the backrest bracket 20 in a co-rotation manner, the first limiting protrusion 73 and the second limiting protrusion 74 in the armrest 70 according to the embodiment of the present application may be circumferentially and alternately arranged along the rotation axis of the armrest 70. For example, the armrest 70 is provided with a rotation shaft hole, and is coupled to the rotation shaft through the rotation shaft hole, and the first and second stopper protrusions 73 and 74 may be spaced around the circumference of the rotation shaft hole.
As shown in fig. 7 and 8, the first limiting structure in the embodiment of the present application includes a third limiting protrusion 22, and the third limiting protrusion 22 is disposed between the first limiting protrusion 73 and the second limiting protrusion 74 and is located on a rotation path formed by the first limiting protrusion 73 and the second limiting protrusion 74. When the folding wheelchair is folded, the backrest bracket 20 rotates anticlockwise, the third limiting protrusion 22 can be abutted with the second limiting protrusion 74 so as to enable the armrest 70 to be linked with the backrest bracket 20, whereas when the folding wheelchair is unfolded, the third limiting protrusion 22 can be abutted with the first limiting protrusion 73 so as to enable the armrest 70 to be linked with the backrest bracket 20.
Further, when the folding wheelchair is in a folded state, the third limiting protrusion 22 abuts against one side of the second limiting protrusion 74, and the other side of the second limiting protrusion 74 abuts against the second limiting structure 12. For example, the second limiting structure 12 may be a limiting surface of the front support frame 10 disposed toward the backrest frame 20, and the limiting surface is configured such that when the folding wheelchair is in the folded state, the limiting surface of the front support frame 10 abuts against the second limiting protrusion 74, so that the armrest 70 is limited between the front support frame 10 and the backrest frame 20.
Illustratively, the armrest 70 may be generally L-shaped in configuration and include a carrying handle 71 and a mounting handle 72, wherein the carrying handle 71 is adapted to provide support to a user and the mounting handle 72 is adapted to rotatably couple the armrest 70 to the back support 20, the armrest 70 having a rotational axis located at an end of the mounting handle 72 remote from the carrying handle 71.
The position of the installation handle 72 close to the rotating shaft hole is provided with a first limiting block and a second limiting block respectively, the first limiting block and the second limiting block are arranged at intervals along the circumferential direction of the rotating shaft hole and form a first limiting protrusion 73 and a second limiting protrusion 74, namely the installation handle 72 is provided with a first limiting block and a second limiting block respectively close to the rotating joint to form the first limiting protrusion 73 and the second limiting protrusion 74 respectively.
It should be noted that the first and second stoppers may be manufactured separately from the armrest 70, and the first and second stoppers are connected to the mounting handle 72 of the armrest 70 to form the first and second limiting protrusions 73 and 74. Of course, the first stopper and the second stopper may be formed integrally with the armrest 70, and the present embodiment is not limited thereto, and preferably the first stopper and the second stopper may be mounted to the mounting handle 72 of the armrest 70, respectively.
Correspondingly, a third limiting block is arranged on the backrest bracket 20 near the rotating connection position, and a third limiting protrusion 22 is formed. When the armrest 70 is rotatably connected to the backrest bracket 20, the third stopper is located between the first stopper and the second stopper, and the third stopper has a stopper surface respectively matched with the first stopper and the second stopper.
When the armrest 70 and the front support frame 10 are rotatably connected to the backrest frame 20, and the rotation axes of the armrest and the front support frame are collinear, the folding and unfolding process of the folding wheelchair is described as follows:
When the folding wheelchair is folded, that is, the folding wheelchair is switched from the unfolded state shown in fig. 9 to the folded state shown in fig. 12. As shown in fig. 9 and 10, the backrest bracket 20 is rotated counterclockwise, the front support bracket 10 follows the movement, the third stopper of the backrest bracket 20 is gradually separated from the first stopper, the armrest 70 is in a free state at this time, if the assembly damping of the armrest 70 is small, the armrest 70 can be rotated counterclockwise by gravity, and if the assembly damping of the armrest 70 is large, the front support bracket 10 is followed to move together.
As shown in fig. 11, when the backrest bracket 20 is rotated to a certain angle, the third limiting block of the backrest bracket 20 can abut against the second limiting block and drive the armrest 70 to rotate together, that is, the armrest 70 can be linked with the backrest bracket 20 in the folding process of the folding wheelchair. As shown in fig. 12, when the folding wheelchair is in a folded state, one side of the second limiting block abuts against the third limiting block, and the other side of the second limiting block abuts against the limiting surface of the front support frame 10, so as to limit the armrest 70 between the front support frame 10 and the backrest support 20, thereby completing the limiting of the armrest 70 and preventing the armrest 70 from shaking, so as to improve the stability of the folding wheelchair in a folded state.
Conversely, when the folding wheelchair is unfolded, the folding wheelchair is switched from the unfolded state shown in fig. 12 to the folded state shown in fig. 9. Firstly, after the backrest bracket 20 rotates clockwise by a certain angle, the front support frame 10 rotates clockwise along with the backrest bracket 20, and the limiting surface of the front support frame 10 is gradually far away from the third limiting block of the backrest bracket 20, in the process, as the armrest 70 has a counter-clockwise rotating acting force under the action of gravity or assembly damping, the armrest 70 cannot rotate clockwise against the gravity, and at the moment, the second limiting block of the armrest 70 keeps attached to the limiting surface of the front support frame 10.
Along with the clockwise continuous rotation of the backrest bracket 20, the third limiting block of the backrest bracket 20 can be abutted with the first limiting block, so that linkage of the armrest 70 and the backrest bracket 20 is realized, the armrest 70 is driven to rotate clockwise, when the backrest bracket 20 rotates in place, the armrest 70 is unfolded in place, the first limiting block is abutted with the third limiting block, the armrest 70 can be prevented from rotating anticlockwise, namely, the armrest 70 is prevented from being folded due to external force, and therefore the supporting reliability of the armrest 70 is improved.
In another embodiment, the armrest 70 is rotatably coupled to the front support bracket 10 and defines a first axis of rotation, the front support bracket 10 is rotatably coupled to the back support bracket 20 and defines a second axis of rotation, and the second axis of rotation is non-collinear with the first axis of rotation.
As shown in fig. 13, the front support frame 10 is fixedly provided with a rotation shaft block 13, the armrest 70 is provided with a first rotation shaft hole 75 matched with the rotation shaft block 13, the first rotation shaft hole 75 is positioned on the mounting handle 72 of the armrest 70, the armrest 70 is sleeved on the rotation shaft block 13 through the first rotation shaft hole 75 and locked through a locking spacer 76, and the armrest 70 is prevented from falling off from the rotation shaft block 13, so that the armrest 70 is rotatably connected to the front support frame 10.
The rotation shaft block 13 is provided with an eccentric second rotation shaft hole 131, the backrest bracket 20 is provided with a rotation shaft 25 matched with the second rotation shaft hole 131, and the front support frame 10 is sleeved on the rotation shaft 25 through the second rotation shaft hole 131, so that the front support frame 10 rotates relative to the backrest bracket 20. The range of the eccentricity between the rotation shaft 25 and the rotation shaft block 13 may be greater than 0mm and 20mm or less, and the shaft diameter of the rotation shaft block 13 is greater than the shaft diameter of the rotation shaft 25 in order to avoid interference between the rotation shaft 25 and the rotation shaft block 13.
In this embodiment, the first limiting structure includes a fourth limiting protrusion 23 and a fifth limiting protrusion 24 that are disposed at intervals, and the fourth limiting protrusion 23 and the fifth limiting protrusion 24 can abut against the first limiting protrusion 73 and the second limiting protrusion 74 of the armrest 70 when the folding wheelchair is in a folded and unfolded state.
Specifically, as shown in fig. 14, the fourth limit projection 23 is configured such that the fourth limit projection 23 abuts against the first limit projection 73 when the folding wheelchair is in the unfolded state, and the fifth limit projection 24 is configured such that the fifth limit projection 24 abuts against the second limit projection 74 when the folding wheelchair is in the folded state, as shown in fig. 16. And, when the folding wheelchair is in the folding process, the fifth limit projection 24 can abut with the second limit projection 74 to cause the armrest 70 to be interlocked with the back support 20 as shown in fig. 15, or when the folding wheelchair is in the unfolding state, the fourth limit projection 23 can abut with the first limit projection 73 to cause the armrest 70 to be interlocked with the back support 20 as shown in fig. 17.
Further, since the first rotation axis and the second rotation axis are not collinear, a relative sliding occurs between the stopper of the back support 20 and the stopper of the armrest 70 during the linkage of the back support 20 and the armrest 70. In order to avoid the jamming phenomenon during the linkage process of the backrest bracket 20 and the armrest 70, the fourth limiting protrusion 23 or the first limiting protrusion 73 are provided with rounded structures facing each other, so that the two may slide relatively when they are in the abutting state. Correspondingly, the fifth limiting projection 24 or the second limiting projection 74 are provided with arc-shaped surfaces facing each other so as to enable the fifth limiting projection or the second limiting projection to relatively slide when in an abutting state.
For example, the fourth limiting protrusion 23 may be a fourth limiting block disposed on the backrest bracket 20, where the fourth limiting block is used for abutting against the first limiting block, and the fourth limiting block and the first limiting block respectively have a plurality of limiting surfaces, and an edge is disposed between adjacent limiting surfaces. The edge of the fourth limiting block, which faces the first limiting block, is provided with a round corner structure, so that the fourth limiting block is abutted with the first limiting block and slides relatively. For example, in the unfolding process of the folding wheelchair, the edge of the lower edge of the fourth limiting block contacts with the limiting surface of the first limiting block, and makes the edge slide along the limiting surface of the first limiting block until the limiting surface where the edge is located is attached to the limiting surface of the first limiting block, so that the linkage between the armrest 70 and the backrest bracket 20 is realized.
Likewise, the fifth limiting protrusion 24 may be a cylinder disposed on the backrest bracket 20, and the cylinder is used for abutting against the second limiting block. The second limiting block comprises a plurality of limiting surfaces, the adjacent limiting surfaces are provided with edges, and when the cylinder is in butt joint with the limiting surface of the second limiting block, line contact is formed between the two limiting surfaces, so that the fifth limiting block can be in butt joint with the second limiting block and can slide relatively. For example, during the folding process, as the backrest bracket 20 rotates counterclockwise, the cylinder starts to contact with the second limiting block, and the backrest bracket 20 continues to rotate, the cylinder slides on the limiting surface of the second limiting block, until the armrest 70 is in the folded state, the cylinder still keeps abutting with the second limiting block, and can make the second limiting block abut with the limiting surface of the front support frame 10.
It should be noted that, in the scheme that the rotation axes formed by the armrest 70, the front support frame 10 and the backrest frame 20 are not collinear, the unfolding and folding process of the folding wheelchair is similar to the coaxial connection scheme of the armrest 70, the front support frame 10 and the backrest frame 20, and will not be repeated here.
As shown in fig. 18, 20 and 21, and referring to fig. 5, in the folding wheelchair provided by the embodiment of the present application, the backrest support 20 and the rear support 30 have locking structures, and when the folding wheelchair is in an unfolded state, the backrest support 20 and the rear support 30 are limited and supported by the locking structures, so as to form a stable triangle structure with rotation axis points a, c and d.
Specifically, the locking structure is formed between the backrest bracket 20 and the rear support bracket 30, and the locking structure includes a first locking surface 21 and a second locking surface 32, wherein a recess is formed at a position of the backrest bracket 20 close to the rear support bracket 30 to form the first locking surface 21, i.e. a surface forming the recess forms the first locking surface 21. The rear support bracket 30 has a projection at an end thereof adjacent to the back bracket 20, the projection being disposed in engagement with the recess, the projection having a second locking surface 32 in engagement with the first locking surface 21. In the unfolding process of the folding wheelchair, when the backrest bracket 20 rotates in place, the protrusion can be embedded into the recess, and the first locking surface 21 and the second locking surface 32 are abutted and attached, so that the limit support of the backrest bracket 20 and the rear support bracket 30 is completed, and the backrest bracket 20 and the rear support bracket 30 are prevented from rotating around the rotation shaft point b in opposite directions.
As shown in fig. 18 to 21, in order to improve stability of the unfolded state of the folding wheelchair, the folding wheelchair provided in the embodiment of the present application further includes a latch hook mechanism 90, the latch hook mechanism 90 includes a link lever 91 and at least one latch hook 92, the link lever 91 penetrates under the seat support 60, and the latch hook 92 is fixed to an end portion of the link lever 91, and the latch hook 92 is rotatably connected to the backrest support 20.
The rear supporting frame 30 is provided with a fixing pin 33 matched with the locking hook 92, the locking hook 92 is provided with a limiting groove 922 matched with the fixing pin 33, the limiting groove 922 can be clamped with the fixing pin 33, a torsion spring 93 is further arranged between the rear supporting frame 30 and the locking hook 92, and the torsion spring 93 is used for providing locking force for the locking hook 92 so as to enable the locking hook 92 to be kept on the backrest bracket 20.
When the folding wheelchair is unfolded in place, the back of the lock hook 92 is firstly contacted with the fixed pin 33, and under the thrust action of the rear support frame 30, the lock hook 92 can rotate clockwise against the locking force of the torsion spring 93, so that the fixed pin 33 can be clamped into the limit groove 922, at the moment, the lock hook 92 rotates anticlockwise under the action of the torsion spring 93 and resets, the bottom of the lock hook 92 is abutted with the limit bulge of the backrest support 20, so that the rotatable lock hook 92 is realized, the limit groove 922 is clamped with the fixed pin 33, further, the restraint on the backrest support 20 and the rear support frame 30 is realized, and the backrest support 20 and the rear support frame 30 are prevented from being separated from each other around the axial point b. Meanwhile, the back support and the rear support frame 30 are limited and supported through the locking structure, so that the back support frame 20 and the rear support frame 30 are prevented from rotating around the shaft point b in opposite directions, the back support frame 20 and the rear support frame 30 are completely restrained, and the first connecting rod mechanism group forms a stable trilateral structure with the shaft points a, c and d.
Illustratively, the latch hook mechanism 90 provided in the embodiment of the present application includes a first latch hook and a second latch hook, where the first latch hook and the second latch hook are symmetrically disposed at two ends of the linkage rod 91, and the first latch hook and the second latch hook are symmetrical members, and the specific structure of the first latch hook is described by taking the first latch hook as an example.
The first latch hook includes a wrench 921 for applying pressure to the first latch hook to make it rotate relative to the back bracket 20 against the torsion force of the torsion spring 93. For example, the pressing wrench 921 is pressed down, and the first latch hook is rotated clockwise, so that the first latch hook is separated from the fixing pin 33, thereby releasing the restriction between the rear support frame 30 and the back support frame 20 to fold the folding wheelchair.
The position that back support 20 is close to first latch hook is provided with the location arch, and the location arch can with the bottom butt of spanner 921, and torsional spring 93 provides outside holding power for first latch hook to make first latch hook have anticlockwise rotation, when the bottom and the location arch butt of spanner 921, first latch hook rotation is put in place this moment, and the spacing groove 922 and the fixed pin 33 joint of first latch hook, in order to accomplish the locking to back support 20 and rear wheel 31 support.
It should be noted that, the first latch hook and the second latch hook can rotate synchronously, when the user operates the wrench 921 of any latch hook 92, the locking and unlocking of the backrest bracket 20 and the rear support bracket 30 can be completed, so that the user experience can be improved.
In this specification, each embodiment or implementation is described in a progressive manner, and each embodiment focuses on a difference from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
Generally, terms should be understood at least in part by use in the context. 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, at least in part depending on the context. Similarly, terms such as "a" or "an" may also be understood to convey a singular usage or a plural usage, depending at least in part on the context.
It should be readily understood that "on," "above," and "above" in this disclosure should be interpreted in the broadest sense so that "on" means not only "directly on something," but also includes the meaning of "on something" with intermediate features or layers therebetween, and "on" or "above" includes the meaning of not only "on something" or "above," but also "above" and may include the meaning of "on something" or "above" with no intermediate features or layers therebetween (i.e., directly on something).
It should be noted that the above embodiments are merely for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.
Claims (16)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2022/107604 WO2024020719A1 (en) | 2022-07-25 | 2022-07-25 | Foldable wheelchair |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115461026A CN115461026A (en) | 2022-12-09 |
| CN115461026B true CN115461026B (en) | 2025-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280002598.0A Active CN115461026B (en) | 2022-07-25 | 2022-07-25 | Folding wheelchair |
Country Status (2)
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|---|---|
| CN (1) | CN115461026B (en) |
| WO (1) | WO2024020719A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115461026B (en) * | 2022-07-25 | 2025-06-27 | 上海邦邦机器人有限公司 | Folding wheelchair |
| CN116999258A (en) * | 2023-07-25 | 2023-11-07 | 中山小神童创新科技有限公司 | a wheelchair |
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| CN110179602A (en) * | 2019-05-10 | 2019-08-30 | 南京康尼智能技术有限公司 | Folding wheel chair |
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| CN114537571A (en) * | 2022-04-14 | 2022-05-27 | 广东银狐医疗科技股份有限公司 | Backrest and armrest linkage folding seat and scooter |
| WO2024020719A1 (en) * | 2022-07-25 | 2024-02-01 | 上海邦邦机器人有限公司 | Foldable wheelchair |
| WO2024020742A1 (en) * | 2022-07-25 | 2024-02-01 | 上海邦邦机器人有限公司 | Foldable wheelchair |
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| JP3981548B2 (en) * | 2001-11-26 | 2007-09-26 | 啓 荒木 | Folding car |
| KR200267038Y1 (en) * | 2001-12-13 | 2002-03-06 | 한일이화주식회사 | Foldable Armrest and Vehicular Seat Apparatus Having The Same |
| US7311361B2 (en) * | 2006-01-26 | 2007-12-25 | Yu-Ching Hung | Apparatus for simultaneously folding seat back and armrest |
| US8523218B2 (en) * | 2010-08-09 | 2013-09-03 | Europe Brands S.A.R.L. | Stroller with articulating structure |
| JP6202769B1 (en) * | 2016-10-18 | 2017-09-27 | ウチヱ株式会社 | Folding nursing wheelchair |
| CN107361935B (en) * | 2017-06-26 | 2023-07-14 | 江苏正辰智能科技有限公司 | A foldable portable wheelchair |
| CN208989415U (en) * | 2017-08-18 | 2019-06-18 | 康动健康管理（深圳）有限公司 | Folding and self-locking structure and folding and self-locking frame and fully collapsible invalid's chair |
| CN209172728U (en) * | 2018-09-29 | 2019-07-30 | 浙江爱司米电气有限公司 | An a kind of key folding power-driven wheelchair |
| CN209203807U (en) * | 2018-11-14 | 2019-08-06 | 江苏君悦智能轮椅科技有限公司 | A kind of foldable wheelchair |
| CN211633968U (en) * | 2019-12-31 | 2020-10-09 | 北京三角洲机器人科技有限公司 | Armrest structure and wheelchair |
| US20210212871A1 (en) * | 2020-01-15 | 2021-07-15 | Michele Marie Klein | Folding electric wheelchair |
| CN214343004U (en) * | 2020-09-30 | 2021-10-08 | 深圳市智维健康科技有限公司 | Folding wheelchair |
| CN112245138B (en) * | 2020-10-19 | 2023-03-24 | 上海邦邦机器人有限公司 | Linkage device, seat and wheelchair |
| CN112690962B (en) * | 2021-01-22 | 2024-09-03 | 浙江爱司米电气有限公司 | Foldable electric wheelchair |
| CN113230049B (en) * | 2021-03-29 | 2023-03-21 | 浙江英洛华康复器材有限公司 | Folding wheelchair |
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| CN215994537U (en) * | 2021-08-19 | 2022-03-11 | 佛山市南海德洋创展康复器材有限公司 | Portable folding wheelchair |
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2022
- 2022-07-25 CN CN202280002598.0A patent/CN115461026B/en active Active
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| CN110179602A (en) * | 2019-05-10 | 2019-08-30 | 南京康尼智能技术有限公司 | Folding wheel chair |
| CN212290154U (en) * | 2020-06-09 | 2021-01-05 | 北京三角洲机器人科技有限公司 | Walk-substituting vehicle |
| CN114537571A (en) * | 2022-04-14 | 2022-05-27 | 广东银狐医疗科技股份有限公司 | Backrest and armrest linkage folding seat and scooter |
| WO2024020719A1 (en) * | 2022-07-25 | 2024-02-01 | 上海邦邦机器人有限公司 | Foldable wheelchair |
| WO2024020742A1 (en) * | 2022-07-25 | 2024-02-01 | 上海邦邦机器人有限公司 | Foldable wheelchair |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115461026A (en) | 2022-12-09 |
| WO2024020719A1 (en) | 2024-02-01 |
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