A foldable wheelchair

Abstract

The utility model provides a kind of foldable wheelchair, solve the problem of existing technology foldable wheelchair armrest folding step cumbersome.A kind of foldable wheelchair, including wheelchair body, left handrail, right handrail and connecting rod.Connecting rod is made of left pole and right pole, and is rotatably connected by connecting piece, and two ends are rotatably connected in left and right handrails.Left and right handrails are respectively provided with locking assembly, including fixed seat, rotating seat, locking column, elastic member and handle.When folding is needed, pull handle to make locking column exit locking hole, after unlocking, left pole and right pole can be folded around connecting piece;At the same time, left and right handrails can be downwardly rotated and attached to seat body by folding mechanism, and the overall volume is significantly reduced.The rotatable setting of left pole, right pole hinged connection connecting piece, combined with the locking and unlocking state switching of first and second locking assemblies on left and right handrails, realizes the quick folding function of connecting rod, convenient operation, small storage volume and stable structure.

Description

Technical Field

[0001] This utility model belongs to the field of daily necessities technology, specifically relating to a foldable wheelchair. Background Technology

[0002] As an important means of transportation for people with mobility impairments, the portability of wheelchairs directly affects the user experience. To improve the convenience of transportation and storage, foldable wheelchairs have become the mainstream in the market. Traditional folding wheelchairs are usually folded up by folding the seat frame or removing the armrests. Most wheelchair armrests need to be unlocked separately and manually rotated to fold, which is cumbersome. Moreover, most wheelchairs require separate operation of the left and right armrests during the folding process, making it difficult to achieve simultaneous control. In addition, the structure is loose after folding, and it still occupies a lot of space. Utility Model Content

[0003] This invention provides a foldable wheelchair, aiming to solve the problem of cumbersome folding steps for the armrests of existing foldable wheelchairs.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides a foldable wheelchair, including a wheelchair body, on which a left armrest and a right armrest are provided, and the left armrest and the right armrest are connected by a connecting rod.

[0006] The connecting rod includes a left rod and a right rod, the left rod and the right rod are rotatably connected by a connector; the end of the left rod away from the right rod is rotatably connected to the left handrail, and the end of the right rod away from the left rod is rotatably connected to the right handrail; the left handrail is provided with a first locking component for locking the left rod, and the right handrail is provided with a second locking component for locking the right rod;

[0007] Both the first locking assembly and the second locking assembly include a locked state and an unlocked state. When both the first locking assembly and the second locking assembly are in the locked state, the left rod is parallel to or coaxial with the right rod, causing the connecting rod to unfold. When both the first locking assembly and the second locking assembly are in the unlocked state, the left rod and the right rod are connected by the connector, allowing the connecting rod to be foldable.

[0008] In a preferred embodiment, the connector includes a first hinge seat and a second hinge seat, the first hinge seat and the second hinge seat are rotatably connected by a pivot, the left rod is fixed to the first hinge seat, and the right rod is fixed to the second hinge seat.

[0009] Based on the above scheme, the first hinge seat and the second hinge seat are rotatably connected by a pivot. The left rod is fixed to the first hinge seat and the right rod is fixed to the second hinge seat, so that the two rods remain coaxial and stable when locked and fold around the pivot when unlocked. This ensures the rigidity and load-bearing capacity in the unfolded state, and also achieves smooth and wobbly movement when folding. The overall structure is simple and compact and easy to assemble.

[0010] In a preferred embodiment, the left rod has a limiting groove at the end near the connector, and the right rod has a protrusion at the end near the connector.

[0011] When the connecting rod is extended, the protrusion engages within the limiting groove;

[0012] When the connecting rod is folded in half, the protrusion disengages from the limiting groove and is located on the adjacent side of the rotating shaft.

[0013] Based on the above solution, the limiting groove and the protrusion engage when unfolded, preventing the left and right rods from rotating relative to each other, so that the connecting rod is instantly rigidly locked, which significantly improves the load-bearing stability and reduces the force on the locking component; when folded, the protrusion automatically disengages with the displacement of the adjacent side of the pivot, without adding any extra operation steps, ensuring smooth folding and compact structure, and taking into account both unfolding safety and folding convenience.

[0014] In a preferred embodiment, the first locking assembly includes a left fixed seat disposed on the left armrest, a left rotating seat rotatably connected to the left fixed seat, and a left rod fixed to the side wall of the left rotating seat. The first locking assembly also includes a left locking pin slidably disposed on the left fixed seat. The left rotating seat is provided with a left locking hole that cooperates with the left locking pin. When the left locking pin is inserted into the left locking hole, the left rotating seat is locked to the left fixed seat. When the left locking pin is disengaged from the left locking hole, the left rotating seat is released from the fixed seat.

[0015] The second locking assembly includes a right fixed seat disposed on the right armrest, a right rotating seat rotatably connected to the right fixed seat, and the right rod fixed to the side wall of the right rotating seat. The first locking assembly also includes a right locking pin slidably disposed on the right fixed seat. The right rotating seat is provided with a right locking hole that cooperates with the right locking pin. When the right locking pin is inserted into the right locking hole, the right rotating seat is locked onto the right fixed seat. When the right locking pin is disengaged from the right locking hole, the right rotating seat is released from locking with the right fixed seat.

[0016] Based on the above scheme, the left and right rotating seats are fixed to the left and right rods respectively and rotatably connected to the corresponding fixed seats. The left and right locking pins can be slidably inserted into the corresponding locking holes to lock, and pulled out to unlock. When unfolded, the connecting rod and the handrail form an integral force-bearing frame, eliminating swaying and ensuring reliable load-bearing. After unlocking, the rotating seats flip and fold synchronously with the rod body. The operation is completed in one step and does not require disassembly.

[0017] In a preferred embodiment, the left fixed seat is provided with a left rotating shaft, the left rotating seat is provided with a shaft hole that mates with the left rotating shaft, the right fixed seat is provided with a right rotating shaft, and the right rotating seat is provided with a right shaft hole that mates with the right rotating shaft.

[0018] In a preferred embodiment, the first locking assembly further includes a left elastic element disposed on the left fixed seat to push the left locking pin so that the left locking pin engages with the left locking hole; the first locking assembly further includes a left handle disposed on the left rotating seat to overcome the elastic force of the left elastic element to push the left locking pin so that the left locking pin disengages from the left locking hole.

[0019] The second locking assembly further includes a right elastic element disposed on the right fixed seat to push the right locking pin so that the right locking pin engages with the right locking hole. The second locking assembly also includes a right handle disposed on the right rotating seat to overcome the elastic force of the right elastic element and push the right locking pin to disengage the right locking pin from the right locking hole.

[0020] In a preferred embodiment, the left handle is engaged with the left rotating base, and the right handle is engaged with the right rotating base.

[0021] Based on the above solution, the left and right elastic elements provide continuous axial thrust, so that the locking pin always has an automatic locking tendency, ensuring zero risk of the locking hole coming out under accidental vibration; simply press down on the left and right handles set on the rotating seat with one finger to easily overcome the elastic force and make the locking pin quickly disengage from the locking hole.

[0022] In a preferred embodiment, the left handle includes a left pressing part, the left pressing part is provided with a left driving part that contacts the left locking pin and pushes the left locking pin to disengage from the left locking hole, the left pressing part is also provided with a left hook that engages with the left rotating seat, and the left rotating seat is provided with a left limiting ring that cooperates with the left hook;

[0023] The right handle includes a right pressing part, which is provided with a right driving part that contacts the right locking pin and pushes the right locking pin to disengage from the right locking hole. The right pressing part is also provided with a right hook that engages with the right rotating seat. The right rotating seat is provided with right and left limiting rings that cooperate with the right hook.

[0024] Based on the above scheme, the contact between the left and right drive parts and the locking pin ensures that when a single finger is pressed down, the locking pin can be pushed out of the locking hole in time, easily releasing the locking pin from the connecting rod. The interlocking of the hook and the limit ring ensures that the handle will not disengage from the rotating seat when not in operation.

[0025] In a preferred embodiment, the left elastic element is a left spring, the left fixed seat is provided with a left hole, the left spring is located in the left hole, the left locking pin is slidably connected to the left hole, and the sliding direction of the left locking pin is parallel to the rotation axis of the connecting member and the rotation axis of the left rod.

[0026] The right elastic element is a right spring, and the right fixed seat is provided with a right spring. The right spring is located in the right hole. The right locking pin is slidably connected to the right hole. The sliding direction of the right locking pin is parallel to the rotation axis of the connecting member and the rotation axis of the right rod.

[0027] Based on the above scheme, the left and right springs are coaxially placed in the left and right holes respectively, and push the corresponding locking pins to slide in a direction parallel to the connecting shaft and the rod shaft, so that the locking force and unlocking force are always transmitted axially, avoiding off-center loading and jamming, ensuring that the locking pins and locking holes are aligned, and improving the smoothness of locking and unlocking.

[0028] In a preferred embodiment, a left connecting block is provided on the left rotating seat, the left connecting block is disposed on the side wall of the left rotating seat, a portion of the left rotating seat extends into the left rod, and the left rod is fixed to the left connecting block by screws;

[0029] A right connecting block is provided on the right rotating seat. The right connecting block is located on the side wall of the right rotating seat. A part of the right rotating seat extends into the right rod. The right rod is fixed to the right connecting block by screws.

[0030] Based on the above solution, the left connecting block and the right connecting block are respectively embedded and screwed into the corresponding rods, so that the rods and the rotating seat form a sleeve structure, avoiding the risk of pinching hands. At the same time, the screws are subjected to axial force, which facilitates assembly and positioning, disassembly and maintenance, and ensures durability and reliability.

[0031] The beneficial effects of this utility model are as follows:

[0032] This invention provides a foldable wheelchair. Through the rotatable hinged connector of the left and right rods, combined with the locking and unlocking switching of independent first and second locking components on the left and right armrests, a rapid folding function is achieved. When the first and second locking components are unlocked simultaneously, the left and right rods can rotate inward around the connector as an axis, significantly reducing the width of the wheelchair. When both locking components are locked, the left and right rods are forced to maintain a parallel extension, ensuring the rigid support of the connecting rods. This retains the stability of traditional fixed connecting rods while allowing folding without disassembling the armrests, improving storage efficiency and portability, and offering simple and reliable operation. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a structural schematic diagram of the foldable wheelchair in this utility model.

[0035] Figure 2 This is the first sectional view of the structure of the left armrest in this utility model.

[0036] Figure 3 This is a second sectional view of the structure of the left armrest in this utility model.

[0037] Figure 4 This is a schematic diagram of the structure of the left rotating seat in this utility model.

[0038] Figure 5 This is an exploded view of the structure of the left handrail in this utility model.

[0039] Figure 6 This is a schematic diagram of the first folding structure of the foldable wheelchair in this utility model.

[0040] Figure 7 yes Figure 6 Enlarged view of point A.

[0041] Figure 8 This is a schematic diagram of the second folding structure of the foldable wheelchair in this utility model.

[0042] Explanation of the labels in the diagram:

[0043] 1-Wheelchair body; 2-Left armrest; 3-Right armrest; 4-Connecting rod; 41-Left rod; 42-Right rod; 5-Connector; 51-First hinge seat; 52-Second hinge seat; 6-Limiting groove; 7-Protrusion; 8-First locking assembly; 81-Left fixing seat; 82-Left rotating seat; 83-Left locking post; 84-Left locking hole; 9-Left rotating shaft; 10-Left shaft hole; 11-Left elastic element; 12-Left handle; 121-Left drive post; 122-Left pressing part; 13-Left hook; 14-Left limiting ring; 15-Left hole body; 16-Left connecting block; 17-Folding mechanism. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0045] See Figures 1-8 This embodiment provides a foldable wheelchair, including a wheelchair body 1, on which a left armrest 2 and a right armrest 3 are provided. The left armrest 2 and the right armrest 3 are connected by a connecting rod 4.

[0046] The connecting rod 4 includes a left rod 41 and a right rod 42, the left rod 41 and the right rod 42 are rotatably connected by a connector 5; the end of the left rod 41 away from the right rod 42 is rotatably connected to the left handrail 2, and the end of the right rod 42 away from the left rod 41 is rotatably connected to the right handrail 3; the left handrail 2 is provided with a first locking component 8 for locking the left rod 41, and the right handrail 3 is provided with a second locking component for locking the right rod 42;

[0047] Both the first locking assembly 8 and the second locking assembly include a locked state and an unlocked state. When both the first locking assembly 8 and the second locking assembly are in the locked state, the left rod 41 and the right rod 42 are parallel or coaxial, causing the connecting rod 4 to unfold. When both the first locking assembly 8 and the second locking assembly are in the unlocked state, the left rod 41 and the right rod 42 are connected by the connector 5, allowing the connecting rod 4 to be foldable.

[0048] Among them, see Figures 6-7 The connecting member 5 includes a first hinge seat 51 and a second hinge seat 52. The first hinge seat 51 and the second hinge seat 52 are rotatably connected by a rotating shaft. The left rod 41 is fixed to the first hinge seat 51, and the right rod 42 is fixed to the second hinge seat 52.

[0049] Specifically, the first hinge seat 51 and the second hinge seat 52 are rotatably connected by the same pivot shaft, and the first hinge seat 51 and the left rod 41 are integrally formed, while the second hinge seat 52 and the right rod 42 are integrally formed.

[0050] In addition, the left rod 41 is provided with a limiting groove 6 at one end near the connector 5, and the right rod 42 is provided with a protrusion 7 at one end near the connector 5;

[0051] When the connecting rod 4 is unfolded, the protrusion 7 is engaged in the limiting groove 6;

[0052] When the connecting rod 4 is folded in half, the protrusion 7 disengages from the limiting groove 6, and the protrusion 7 is located on the adjacent side of the rotating shaft.

[0053] Specifically, the limiting groove 6 is located in the middle region of the first hinge seat 51. The limiting groove 6 is a groove. The protrusion 7 is located in the middle region of the second hinge seat 52 and is configured to cooperate with the limiting groove 6. When the connecting rod 4 is folded, the protrusion 7 disengages upward from the limiting groove 6 until the left rod 41 and the right rod 42 are in contact. At this point, the protrusion 7 is located on the leading side of the pivot. When the left rod 41 and the right rod 42 are extended or coaxial, the protrusion 7 and the limiting groove 6 rotate downward simultaneously, causing the protrusion 7 to re-embed into the limiting groove 6, so that the connecting rod 4 is fully extended.

[0054] See Figure 2 and Figure 3 To lock the connecting rod 4 and prevent it from folding in use, based on any of the above solutions, the first locking assembly 8 includes a left fixed seat 81 disposed on the left armrest 2, a left rotating seat 82 rotatably connected to the left fixed seat 81, and the left rod 41 fixed to the side wall of the left rotating seat 82. The first locking assembly 8 also includes a left locking pin 83 slidably disposed on the left fixed seat 81. The left rotating seat 82 is provided with a left locking hole 84 that cooperates with the left locking pin 83. When the left locking pin 83 is inserted into the left locking hole 84, the left rotating seat 82 is locked to the left fixed seat 81. When the left locking pin 83 is disengaged from the left locking hole 84, the left rotating seat 82 is released from the fixed seat.

[0055] The second locking assembly includes a right fixed seat disposed on the right handrail 3, a right rotating seat rotatably connected to the right fixed seat, and the right rod 42 fixed to the side wall of the right rotating seat. The first locking assembly 8 also includes a right locking pin slidably disposed on the right fixed seat. The right rotating seat is provided with a right locking hole that cooperates with the right locking pin. When the right locking pin is inserted into the right locking hole, the right rotating seat is locked onto the right fixed seat. When the right locking pin is disengaged from the right locking hole, the right rotating seat is released from locking with the right fixed seat.

[0056] Specifically, the left fixed seat 81 is fixed to the left armrest 2, and the front end is provided with a left rotating shaft 9; the left rotating seat 82 is fitted with the left rotating shaft 9 through a shaft hole to form a rotating connection, the left connecting block 16 extending from the side wall of the left rotating seat 82 is inserted into the left rod 41 and locked with screws, the left fixed seat 81 is provided with a left hole 15 along the axial direction of the left rotating shaft 9, the left spring and the left locking pin 83 are coaxially placed in the hole, the spring pushes the locking pin towards the left rotating seat 82, the left rotating seat 82 has a left locking hole 84 at the corresponding position; when the locking pin is inserted into the locking hole, the rotating seat and the fixed seat are rigidly locked, and the left rod 41 remains unfolded; the left rotating seat 82 is provided with a left handle 12 on the outside, when pressed, it overcomes the spring force to push the locking pin out of the left locking hole 84, the rotating seat can rotate around the left rotating shaft 9 so that the left rod 41 is in a foldable state. The right fixed seat, right rotating shaft, right rotating seat, right connecting block, right locking pin, right spring, right locking hole and right handle are symmetrically arranged. The working principle is exactly the same as that on the left. The entire connecting rod 4 can be unfolded and folded by locking or unlocking on both sides at the same time.

[0057] Among them, see Figure 3 and Figure 4 The left fixed seat 81 is provided with a left rotating shaft 9, the left rotating seat 82 is provided with a shaft hole that mates with the left rotating shaft 9, the right fixed seat is provided with a right rotating shaft, and the right rotating seat is provided with a right shaft hole that mates with the right rotating shaft.

[0058] The first locking assembly 8 further includes a left elastic member 11 disposed on the left fixed seat 81, which pushes the left locking pin 83 to engage with the left locking hole 84. The first locking assembly 8 also includes a left handle 12 disposed on the left rotating seat 82, which overcomes the elastic force of the left elastic member 11 to push the left locking pin 83 to disengage the left locking pin 83 from the left locking hole 84.

[0059] The second locking assembly further includes a right elastic element disposed on the right fixed seat to push the right locking pin so that the right locking pin engages with the right locking hole. The second locking assembly also includes a right handle disposed on the right rotating seat to overcome the elastic force of the right elastic element and push the right locking pin to disengage the right locking pin from the right locking hole.

[0060] The left handle 12 is engaged with the left rotating base 82, and the right handle is engaged with the right rotating base.

[0061] Specifically, the left fixed seat 81 and the left rotating seat 82 are rotatably connected via the left rotating shaft 9 and the left shaft hole 10, and the right fixed seat and the right rotating seat are rotatably connected via the right rotating shaft and the right shaft hole; the left fixed seat 81 has an internal axial hole in which the left elastic element 11 and the left locking pin 83 are placed in sequence, and the left elastic element 11 pushes the left locking pin 83 toward the left rotating seat 82; the left rotating seat 82 has a left locking hole 84 at the corresponding position, and the pin end is inserted into the hole to achieve rigid locking, and the left rod 41 remains extended;

[0062] The left handle 12 is fixed to the outside of the left rotating seat 82 by a snap-fit ​​structure. Pressing the left handle 12 overcomes the elastic force of the left elastic element 11 and pushes the left locking pin 83 out of the left locking hole 84, releasing the lock so that the left rotating seat 82 can be flipped and folded around the left rotating axis 9. The right fixed seat, right elastic element, right locking pin, right locking hole and right handle are arranged in a completely symmetrical manner. Pressing the right handle unlocks the entire connecting rod 4, realizing the unfolding and locking or folding and releasing of the entire connecting rod 4.

[0063] The left handle 12 includes a left pressing part 122, which is provided with a left driving part that contacts the left locking pin 83 and pushes the left locking pin 83 to disengage from the left locking hole 84. The left pressing part 122 is also provided with a left hook 13 that engages with the left rotating seat 82. The left rotating seat 82 is provided with a left limiting ring 14 that cooperates with the left hook 13.

[0064] The right handle includes a right pressing part, which is provided with a right driving part that contacts the right locking pin and pushes the right locking pin to disengage from the right locking hole. The right pressing part is also provided with a right hook that engages with the right rotating seat. The right rotating seat is provided with right and left limiting rings 14 that cooperate with the right hook.

[0065] Specifically, the left driving part is a left driving post 121 extending towards the left locking post 83, the left pressing part 122 is a pressing piece installed on the end face of the left rotating seat 82, the pressing piece extends towards the left fixed seat 81 with a left hook 13, the left rotating seat 82 is provided with a left limiting ring 14 for engaging the left hook 13 to prevent the limiting hook from disengaging from the left rotating seat 82, the left limiting ring 14 and the end face of the left fixed seat 81 near the left rotating seat 82 have a gap for the left handle 12 to slide, there are two left hooks 13, the left limiting ring 14 is provided on the inner side wall of the left rotating seat 82, and the left hooks 13 extend toward the inner side wall of the left rotating seat 82;

[0066] The right drive unit is a right drive column extending towards the right locking column. The right pressing unit is a pressing piece installed on the end face of the right rotating seat. The pressing piece extends towards the right fixed seat with a right hook. The right rotating seat is provided with a right limiting ring for engaging the right hook to prevent the limiting hook from disengaging from the right rotating seat. There is a gap between the right limiting ring and the end face of the right fixed seat near the right rotating seat for the right handle to slide. There are two right hooks. The right limiting ring is located on the inner side wall of the right rotating seat, and the right hooks extend towards the inner side wall of the right rotating seat.

[0067] In addition, the left elastic element 11 is a left spring, the left fixed seat 81 is provided with a left hole 15, the left spring is located in the left hole 15, the left locking pin 83 is slidably connected in the left hole 15, and the sliding direction of the left locking pin 83 is parallel to the rotation axis of the connecting member 5 and the rotation axis of the left rod 41.

[0068] The right elastic element is a right spring, and the right fixed seat is provided with a right spring. The right spring is located in the right hole. The right locking pin is slidably connected to the right hole. The sliding direction of the right locking pin is parallel to the axis of rotation of the connecting member 5 and the axis of rotation of the right rod 42.

[0069] Specifically, the left fixed seat 81 is provided with a left hole body 15, and the left spring is coaxially placed at the bottom of the hole and pushes the left locking pin 83, which can slide in the hole. The front end of the pin is aligned with the left locking hole 84 on the left rotating seat 82. The right fixed seat is symmetrically provided with a right hole body, a right spring and a right locking pin. Under normal conditions, the spring pushes the locking pin into the corresponding locking hole, the rotating seat is axially locked and the rod remains unfolded. When the handle is pressed, its drive part pushes the locking pin axially to compress the spring and exit the locking hole. The rotating seat and the rod can then be flipped and folded around the coaxial left rotating axis 9 / right rotating axis. After releasing the handle, the spring returns to its original position and locks again.

[0070] See Figure 4 A left connecting block 16 is provided on the left rotating seat 82. The left connecting block 16 is provided on the side wall of the left rotating seat 82. A part of the left rotating seat 82 extends into the left rod 41. The left rod 41 is fixed to the left connecting block 16 by screws.

[0071] A right connecting block is provided on the right rotating seat. The right connecting block is located on the side wall of the right rotating seat. A part of the right rotating seat extends into the right rod 42. The right rod 42 is fixed to the right connecting block by screws.

[0072] Specifically, the left connecting block 16 is a left connecting post extending from the left rotating seat 82 toward the connecting rod 4. The left connecting post is inserted into the left rod 41 and fixed to the left rod 41 by screws perpendicular to the axis of the connecting post. The right connecting block is a right connecting post extending from the right rotating seat toward the connecting rod 4. The right connecting post is inserted into the right rod 42 and fixed to the right rod 42 by screws perpendicular to the axis of the connecting post.

[0073] Additionally, see Figures 7-8 Both the left armrest 2 and the right armrest 3 are provided with a folding mechanism 17 between themselves and the wheelchair body 1, which allows the armrests to be rotated downwards and folded, thus reducing the size of the wheelchair after folding. Furthermore, the bottom of the wheelchair body 1 is provided with a scissor-type folding frame that brings the left and right sides of the wheelchair body 1 closer together. In this invention, the connecting rod 4 is folded in half, and the armrests are folded together for the first fold of the wheelchair. The armrests are then rotated downwards along the folding mechanism 17 for a second fold.

[0074] The following explanation, based on the working principle, further illustrates this utility model:

[0075] When folding, first press the left and right handles to compress the locking pins and release the locking springs from the locking holes, thus unlocking the wheelchair. The drive unit of the left handle 12 pushes the left locking pin 83, and the drive unit of the right handle pushes the right locking pin, causing the left rotating seat 82 to rotate counterclockwise and the right rotating seat to rotate clockwise. The left and right rods 42 rotate accordingly, the protrusion 7 disengages from the limiting groove 6, and the left and right rods 42 fold at the connecting piece 5. At the same time, the left and right rods 42 rotate inward to fit together. The left and right armrests 3 rotate downward with the help of the folding mechanism 17 to fit together with the seat. Finally, fold the scissor-type folding frame to bring the left and right sides of the wheelchair closer together, completing the overall folding.

[0076] This utility model is not limited to the above-mentioned optional embodiments. Under the premise of non-contradiction, the various solutions can be combined arbitrarily. Anyone can derive other forms of products under the guidance of this utility model. However, no matter what changes are made in their shape or structure, all technical solutions that fall within the scope of the claims of this utility model are within the protection scope of this utility model.

Claims

1. A foldable wheelchair, characterized in that, The wheelchair includes a main body, on which a left armrest and a right armrest are provided, and the left armrest and the right armrest are connected by a connecting rod. The connecting rod includes a left rod and a right rod, the left rod and the right rod are rotatably connected by a connector; the end of the left rod away from the right rod is rotatably connected to the left handrail, and the end of the right rod away from the left rod is rotatably connected to the right handrail; the left handrail is provided with a first locking component for locking the left rod, and the right handrail is provided with a second locking component for locking the right rod; Both the first locking assembly and the second locking assembly include a locked state and an unlocked state. When both the first locking assembly and the second locking assembly are in the locked state, the left rod is parallel to or coaxial with the right rod, causing the connecting rod to unfold. When both the first locking assembly and the second locking assembly are in the unlocked state, the left rod and the right rod are connected by the connector, allowing the connecting rod to be foldable.

2. A foldable wheelchair according to claim 1, characterized in that, The connector includes a first hinge seat and a second hinge seat, which are rotatably connected by a pivot. The left rod is fixed to the first hinge seat, and the right rod is fixed to the second hinge seat.

3. A foldable wheelchair according to claim 2, characterized in that, The left rod has a limiting groove at one end near the connector, and the right rod has a protrusion at one end near the connector; When the connecting rod is extended, the protrusion engages within the limiting groove; When the connecting rod is folded in half, the protrusion disengages from the limiting groove and is located on the adjacent side of the rotating shaft.

4. A foldable wheelchair according to claim 2, characterized in that, The first locking assembly includes a left fixed seat disposed on the left armrest, a left rotating seat rotatably connected to the left fixed seat, and a left rod fixed to the side wall of the left rotating seat. The first locking assembly also includes a left locking pin slidably disposed on the left fixed seat. The left rotating seat is provided with a left locking hole that cooperates with the left locking pin. When the left locking pin is inserted into the left locking hole, the left rotating seat is locked onto the left fixed seat. When the left locking pin is disengaged from the left locking hole, the left rotating seat is released from the fixed seat. The second locking assembly includes a right fixed seat disposed on the right armrest, a right rotating seat rotatably connected to the right fixed seat, and the right rod fixed to the side wall of the right rotating seat. The first locking assembly also includes a right locking pin slidably disposed on the right fixed seat. The right rotating seat is provided with a right locking hole that cooperates with the right locking pin. When the right locking pin is inserted into the right locking hole, the right rotating seat is locked onto the right fixed seat. When the right locking pin is disengaged from the right locking hole, the right rotating seat is released from locking with the right fixed seat.

5. A foldable wheelchair according to claim 4, characterized in that, The left fixed seat is provided with a left rotating shaft, and the left rotating seat is provided with a left shaft hole that mates with the left rotating shaft. The right fixed seat is provided with a right rotating shaft, and the right rotating seat is provided with a right shaft hole that mates with the right rotating shaft.

6. A foldable wheelchair according to claim 4, characterized in that, The first locking assembly further includes a left elastic element disposed on the left fixed seat to push the left locking pin so that the left locking pin engages with the left locking hole. The first locking assembly also includes a left handle disposed on the left rotating seat to overcome the elastic force of the left elastic element and push the left locking pin to disengage the left locking pin from the left locking hole. The second locking assembly further includes a right elastic element disposed on the right fixed seat to push the right locking pin so that the right locking pin engages with the right locking hole. The second locking assembly also includes a right handle disposed on the right rotating seat to overcome the elastic force of the right elastic element and push the right locking pin to disengage the right locking pin from the right locking hole.

7. A foldable wheelchair according to claim 6, characterized in that, The left handle is engaged with the left rotating base, and the right handle is engaged with the right rotating base.

8. A foldable wheelchair according to claim 6, characterized in that, The left handle includes a left pressing part, which is provided with a left driving part that contacts the left locking pin and pushes the left locking pin to disengage from the left locking hole. The left pressing part is also provided with a left hook that engages with the left rotating seat. The left rotating seat is provided with a left limiting ring that cooperates with the left hook. The right handle includes a right pressing part, which is provided with a right driving part that contacts the right locking pin and pushes the right locking pin to disengage from the right locking hole. The right pressing part is also provided with a right hook that engages with the right rotating seat. The right rotating seat is provided with right and left limiting rings that cooperate with the right hook.

9. A foldable wheelchair according to claim 6, characterized in that, The left elastic element is a left spring. The left fixed seat is provided with a left hole. The left spring is located in the left hole. The left locking pin is slidably connected to the left hole. The sliding direction of the left locking pin is parallel to the rotation axis of the connecting member and the rotation axis of the left rod. The right elastic element is a right spring, and the right fixed seat is provided with a right spring. The right spring is located in the right hole. The right locking pin is slidably connected to the right hole. The sliding direction of the right locking pin is parallel to the rotation axis of the connecting member and the rotation axis of the right rod.

10. A foldable wheelchair according to claim 6, characterized in that, A left connecting block is provided on the left rotating seat. The left connecting block is located on the side wall of the left rotating seat. A portion of the left rotating seat extends into the left rod. The left rod is fixed to the left connecting block by screws. A right connecting block is provided on the right rotating seat. The right connecting block is located on the side wall of the right rotating seat. A part of the right rotating seat extends into the right rod. The right rod is fixed to the right connecting block by screws.

Images