A folding wheelchair

Abstract

The utility model discloses a folding wheelchair relates to mobile auxiliary equipment field, it includes seat frame, seat frame connecting piece, back frame, front wheel frame, rear wheel frame, first connecting frame, transmission connecting piece and locking module, back frame, front wheel frame and rear wheel frame are along the axis A rotation setting, front wheel frame is connected with the front wheel group for being used to contact with ground, and rear wheel frame is connected with the rear wheel group for being used to contact with ground, seat frame sets up above front wheel frame, seat frame connecting piece one end is rotatively connected with seat frame, and the other end is rotatively connected with back frame, first connecting frame is rotatively connected with front wheel frame, the back end of transmission connecting piece is rotatively connected with rear wheel frame, the front end of transmission connecting piece is rotatively connected with seat frame and is rotatively connected with first connecting frame, and locking module is used for the relative displacement of constraint rear wheel frame and back frame. This wheelchair passes through the rotation linkage of multiple components, and after unlocking, only needs to operate back frame to drive seat frame, rear wheel frame synchronous folding, and the front wheel group is fixed as fulcrum, and folding is efficient and convenient, and improves the use experience.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair technology, and in particular to a folding wheelchair. Background Technology

[0002] Wheelchairs are essential mobility aids for people with mobility impairments, the elderly, and post-operative rehabilitation patients. Their ease of use and storage flexibility directly impact users' travel experience and quality of life. With the accelerating aging of the population and the development of the rehabilitation medicine field, the market's functional demands for wheelchairs are becoming increasingly diversified. They not only require stable support and mobility but also greater convenience during transportation and storage. Folding functionality has become one of the core design elements of wheelchair products.

[0003] In existing technologies, wheelchairs are typically constructed based on a modular design concept to achieve clear functional division and convenient assembly. Their core components generally include a seat frame module, backrest module, wheel frame module, and armrest module. These modules work together to ensure the wheelchair's proper functioning. The seat frame module, as the core load-bearing structure, supports the user's weight, and its structural stability directly determines the wheelchair's safety performance. The backrest module connects to the seat frame module, providing back support and improving riding comfort. The wheel frame module typically includes drive wheels, swivel wheels, and corresponding connecting frames, and is crucial for enabling wheelchair mobility. Some wheel frame modules also integrate braking mechanisms for safety. The armrest modules are symmetrically positioned on both sides of the seat frame module, providing hand support and facilitating user movements such as standing and turning.

[0004] To meet users' space requirements during travel and storage, most existing wheelchairs are designed with folding functionality. However, current folding technologies have significant limitations and struggle to meet users' actual needs for efficient operation. Specifically, existing wheelchair folding designs mostly adopt a "modular independent folding" model, meaning that each core module, such as the seat frame, backrest, wheel frame, and armrests, can only fold independently, lacking an effective linkage folding mechanism between modules.

[0005] This non-linked folding method brings many problems: On the one hand, it increases the complexity of operation for users. For core users who are already physically challenged, repeated independent operations are not only physically exhausting, but may also lead to operational errors due to the cumbersome operation steps, reducing the safety of folding operation. On the other hand, it significantly affects the efficiency of folding operation. In scenarios where wheelchairs need to be temporarily stored during travel (such as when traveling by car or entering a narrow space), the lengthy folding process will cause great inconvenience to users and may even delay their trip. Utility Model Content

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a folding wheelchair.

[0007] A folding wheelchair designed for this purpose includes a seat frame, a seat frame connector, a back frame, a front wheel frame, a rear wheel frame, a first connecting frame, a transmission connector, and a locking module. The back frame, front wheel frame, and rear wheel frame are rotatably arranged along axis A; The front wheel frame is connected to a front wheel assembly for contact with the ground, and the rear wheel frame is connected to a rear wheel assembly for contact with the ground. The seat frame is positioned above the front wheel frame; one end of the seat frame connector is rotatably connected to the seat frame, and the other end is rotatably connected to the back frame. The first connecting frame is rotatably connected to the front wheel frame; The rear end of the transmission connector is rotatably connected to the rear wheel frame; the front end of the transmission connector is rotatably connected to the seat frame and also rotatably connected to the first connecting frame. The locking module is used to constrain the relative displacement between the rear wheel frame and the back frame.

[0008] Preferably, the locking module includes a locking fastener rotatably mounted on the rear wheel frame, and the locking fastener is provided with a locking groove; The back frame is provided with a locking frame extending to the rear, and the locking frame is provided with a locking pin; When the locking fastener rotates relative to the rear wheel frame, the locking pin can be engaged into or disengaged from the locking slot.

[0009] Preferably, the transmission connector is provided with a first connector, the first connecting frame is provided with a second connector, and the first connector and the second connector are rotatably connected.

[0010] Preferably, the back frame is rotatably connected to an armrest element, the armrest element is rotatably connected to a support rod, and the end of the support rod away from the armrest element is rotatably connected to the seat frame.

[0011] Preferably, there are two transmission connectors, spaced apart on the left and right.

[0012] Preferably, a foot pedal is provided on the front side of the front wheel frame, the foot pedal is rotatably connected to the front wheel frame, and the front wheel frame is connected to a limiting element for supporting and limiting the foot pedal.

[0013] Preferably, a backrest top frame is provided above the back frame, and the backrest top frame is rotatably connected to the back frame.

[0014] Compared with the prior art, this utility model overcomes the shortcomings of independently folding wheelchair modules in the prior art. Through the ingenious layout and rotational coordination of core components such as the seat frame connector, the first connecting frame, and the transmission connector, this folding wheelchair establishes a highly efficient multi-module linkage folding mechanism. Its beneficial effects are mainly reflected in the following aspects: First, it achieves synchronous and coordinated folding of the back frame, front wheel frame, rear wheel frame, and seat frame, eliminating the need for individual operation of each module. After the locking module is unlocked, the rotation of the back frame around axis A can drive the seat frame to move synchronously through the seat frame connector. The displacement of the seat frame can then transmit the force to the rear wheel frame through the transmission connector. Simultaneously, with the rotational constraints of the first connecting frame and the front wheel frame, the front wheel frame and rear wheel frame can complete the folding action synchronously with the operation of the back frame, changing the existing "step-by-step folding" operation mode of wheelchairs and greatly simplifying the folding process.

[0015] Secondly, it significantly reduces the difficulty and physical exertion of operation. Core users can complete the overall folding process simply through the back frame, eliminating the need to repeatedly unlock and fold individual modules. This effectively avoids operational errors caused by cumbersome steps and improves the safety and convenience of the folding process. Furthermore, the linked folding mechanism ensures coordinated displacement of each module during folding, avoiding module interference issues that may occur when folding independently. The overall structure is more compact after folding, greatly optimizing space utilization. It is particularly suitable for high-frequency travel scenarios such as riding in vehicles and storage in confined spaces, solving the core pain points of low folding efficiency and inconvenient storage of existing wheelchairs. Attached Figure Description

[0016] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model; Figure 2 This is the second three-dimensional structural schematic diagram of the present invention; Figure 3 A 3D structural diagram showing the locking module in unlocked mode; Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is one of the diagrams showing a wheelchair in its folded state. Figure 6 This is the second illustration of a wheelchair in its folded state. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] See Figures 1-6A folding wheelchair includes a seat frame 10, a seat frame connector 110, a back frame 20, a front wheel frame 30, a rear wheel frame 40, a first connecting frame 50, a transmission connector 60, and a locking module 80. The back frame 20, the front wheel frame 30, and the rear wheel frame 40 are rotatably arranged along axis A. The front wheel frame 30 is connected to a front wheel assembly 310 for contact with the ground, and the rear wheel frame 40 is connected to a rear wheel assembly 410 for contact with the ground. The seat frame 10 is disposed above the front wheel frame 30. One end of the seat frame connector 110 is rotatably connected to the seat frame 10, and the other end is rotatably connected to the back frame 20. The first connecting frame 50 is rotatably connected to the front wheel frame 30. The rear end of the transmission connector 60 is rotatably connected to the rear wheel frame 40. The front end of the transmission connector 60 is rotatably connected to the seat frame 10 and also rotatably connected to the first connecting frame 50. The locking module 80 is used to constrain the relative displacement between the rear wheel frame 40 and the back frame 20.

[0019] The working principle of this folding wheelchair revolves around the core design of "linkage transmission," which achieves efficient switching between unfolded support and folded storage through the rotation and coordination of various components. Specifically, it consists of two parts: unfolded use mode and folded storage mode. Firstly, the principle in the unfolded use state. At this time, the locking module 80 is in a locked state, providing a stable support foundation for the entire wheelchair structure by constraining the relative displacement of the rear wheel frame 40 and the back frame 20. The back frame 20, front wheel frame 30, and rear wheel frame 40 all maintain a fixed angle unfolded posture along axis A. The seat frame 10 above the front wheel frame 30 forms a stable triangular support structure with the back frame 20 through the seat frame connector 110, ensuring that the seat frame 10 has sufficient load-bearing strength to support the user's weight. Simultaneously, the front end of the transmission connector 60 is rotate-locked to the seat frame 10 and the first connecting frame 50, while the rear end is stably connected to the rear wheel frame 40. Combined with the rotational constraint relationship between the first connecting frame 50 and the front wheel frame 30, the front wheel frame 30 and the rear wheel frame 40 smoothly contact the ground through the front wheel assembly 310 and the rear wheel assembly 410 respectively, forming a four-point support structure to ensure the stability of the user while riding and the smoothness of movement.

[0020] Secondly, the principle in the folded storage state. When folding is required, the locking module 80 is first unlocked, releasing its displacement constraint on the rear wheel frame 40 and the back frame 20. At this time, the linkage transmission mechanism of each component is officially activated. Throughout the folding process, the front wheel assembly 310, as the fulcrum, remains in contact with the ground, and the front wheel assembly 310 and the front wheel frame 30 remain relatively fixed. The user flips the back frame 20 forward, and the back frame 20 rotates around axis A. Its rotation is transmitted to the seat frame 10 through the seat frame connector 110, which is rotatably connected to it at one end. This causes the seat frame 10 to move forward and downward synchronously based on the front wheel frame 30. The displacement of the seat frame 10 directly acts on the transmission connector 60, which is rotatably connected to it at the front end. This causes the transmission connector 60 to rotate around the connection point with the seat frame 10, thereby pulling the rear wheel frame 40 connected to the rear end to fold inward around axis A, achieving synchronous forward movement of the rear wheel assembly 410. Simultaneously, during rotation, the transmission connector 60 drives the first connecting frame 50 to move through its rotational connection with the first connecting frame 50. Since the front wheel frame 30 remains stationary, the movement of the first connecting frame 50 further assists in the force transmission between the seat frame 10 and the transmission connector 60, ensuring the smooth and efficient folding action of the rear wheel frame 40. Throughout the process, the single operation of the back frame 20 is achieved through the sequential transmission of the seat frame connector 110, the transmission connector 60, and the first connecting frame 50. With the stable support of the front wheel assembly 310, the seat frame 10 and the rear wheel frame 40 are synchronously driven to complete the folding action, ultimately realizing the overall folding of the wheelchair.

[0021] See Figure 4 The locking module 80 includes a locking fastener 820 rotatably mounted on the rear wheel frame 40, the locking fastener 820 having a locking groove 840; the back frame 20 has a locking bracket 810 extending rearward, the locking bracket 810 having a locking pin 830; when the locking fastener 820 rotates relative to the rear wheel frame 40, the locking pin 830 can engage with or disengage from the locking groove 840. The core function of the locking module 80 is to reliably switch and securely lock the wheelchair between unfolded and folded states. When the wheelchair is unfolded, the locking fastener 820 on the rear wheel frame 40 is rotated, causing the locking pin 830 on the locking frame 810 of the back frame 20 to engage in the locking groove 840 of the locking fastener 820. The engagement of the locking pin and the locking groove constrains the relative displacement between the rear wheel frame 40 and the back frame 20, providing stable support for the entire wheelchair structure and ensuring passenger safety. When the wheelchair needs to be folded, the locking fastener 820 is rotated in the opposite direction, causing the locking pin 830 to disengage from the locking groove 840, releasing the displacement constraint between the two and providing the preconditions for the coordinated folding action of each module. The operation is simple and efficient.

[0022] In this utility model, the locking module 80 can also use bolts or locking pins to lock the rear wheel frame 40 and the back frame 20.

[0023] In this utility model, the transmission connector 60 is provided with a first connector 610, the first connecting frame 50 is provided with a second connector 510, and the first connector 610 and the second connector 510 are rotatably connected.

[0024] In this utility model, the back frame 20 is rotatably connected to the armrest element 70, the armrest element 70 is rotatably connected to the support rod 710, and the end of the support rod 710 away from the armrest element 70 is rotatably connected to the seat frame 10.

[0025] In this utility model, there are two transmission connectors 60, which are spaced apart on the left and right.

[0026] In this invention, a foot pedal 90 is provided on the front side of the front wheel frame 30, and the foot pedal 90 is rotatably connected to the front wheel frame 30. The front wheel frame 30 is connected to a limiting element 910 for supporting and limiting the foot pedal 90. The limiting element 910 is a C-shaped pipe clamp. When the foot pedal 90 is flipped to the use state, part of the foot pedal 90 is inserted into the C-shaped pipe clamp.

[0027] In this invention, a backrest top frame 200 is provided above the back frame 20, and the backrest top frame 200 is rotatably connected to the back frame 20. The backrest top frame 200 is used to increase the height of the back frame so that it can serve as a grip when the wheelchair is pushed. The rotatable connection between the backrest top frame 200 and the back frame 20 can be secured by a locking pin, and the specific structure can adopt existing technology. Alternatively, both the backrest top frame 200 and the back frame 20 are provided with pin holes, and a spring pin is provided in one of the pin holes. Under the action of a spring, the spring pin can move between a first position and a second position. When the spring releases its stored force and pushes the spring pin to the first position, it elastically inserts into both pin holes. If it is necessary to unlock and drive the backrest top frame 200 to rotate relative to the back frame 20, the spring pin needs to be manually pressed to move it to the second position, that is, disengage it from one of the pin holes.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A folding wheelchair, characterized in that: It includes a seat frame (10), a seat frame connector (110), a back frame (20), a front wheel frame (30), a rear wheel frame (40), a first connecting frame (50), a transmission connector (60), and a locking module (80). The back frame (20), front wheel frame (30) and rear wheel frame (40) are rotatably arranged along axis A; The front wheel frame (30) is connected to a front wheel assembly (310) for contact with the ground, and the rear wheel frame (40) is connected to a rear wheel assembly (410) for contact with the ground. The seat frame (10) is positioned above the front wheel frame (30); one end of the seat frame connector (110) is rotatably connected to the seat frame (10), and the other end is rotatably connected to the back frame (20); The first connecting frame (50) is rotatably connected to the front wheel frame (30); The rear end of the transmission connector (60) is rotatably connected to the rear wheel frame (40); the front end of the transmission connector (60) is rotatably connected to the seat frame (10) and rotatably connected to the first connecting frame (50); The locking module (80) is used to constrain the relative displacement between the rear wheel frame (40) and the back frame (20).

2. A folding wheelchair according to claim 1, characterized in that: The locking module (80) includes a locking fastener (820) rotatably mounted on the rear wheel frame (40), and the locking fastener (820) is provided with a locking groove (840). The back frame (20) is provided with a locking frame (810) extending to the rear, and the locking frame (810) is provided with a locking pin (830). When the locking fastener (820) rotates relative to the rear wheel frame (40), the locking pin (830) can be engaged into or disengaged from the locking slot (840).

3. A folding wheelchair according to claim 1, characterized in that: The transmission connector (60) is provided with a first connector (610), and the first connecting frame (50) is provided with a second connector (510). The first connector (610) and the second connector (510) are rotatably connected.

4. A folding wheelchair according to claim 1, characterized in that: The back frame (20) is rotatably connected to an armrest element (70), the armrest element (70) is rotatably connected to a support rod (710), and the end of the support rod (710) away from the armrest element (70) is rotatably connected to the seat frame (10).

5. A folding wheelchair according to claim 1, characterized in that: The transmission connector (60) is provided in two parts, spaced apart on the left and right.

6. A folding wheelchair according to claim 1, characterized in that: A foot pedal (90) is provided on the front side of the front wheel frame (30), the foot pedal (90) is rotatably connected to the front wheel frame (30), and the front wheel frame (30) is connected to a limiting element (910) for supporting and limiting the foot pedal (90).

7. A folding wheelchair according to claim 1, characterized in that: A backrest top frame (200) is provided above the back frame (20), and the backrest top frame (200) is rotatably connected to the back frame (20).

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