A folding small-sized scooter

Abstract

The utility model provides a kind of folding small-sized scooter, two groups of connecting rod group mechanism with interval preset interval are connected between the bottom of its seat plate and frame, connecting rod group mechanism all includes parallel distribution's first connecting rod, the both respective two ends are rotatably connected with seat plate and frame, and the storage or unfolding of vehicle body is carried out by the synchronous rotation of two connecting rods;Second connecting rod is rotatably connected with third connecting rod near its connecting position with seat plate, another end of third connecting rod is rotatably connected with fourth connecting rod, the middle portion of fourth connecting rod is rotatably connected with the end of seat plate, another end of fourth connecting rod is fixedly connected with the end of chair back with preset angle, to drive the unfolding or folding of chair back relative to seat plate by the rotating action of second connecting rod, the folding and unfolding action of seat and frame is completed once, the folding of seat plate and chair back is completed once, the folding storage structure of common design is complex and inconvenient to operate, and the problem that it is difficult to complete complete folding storage conveniently is solved.

Description

Technical Field

[0001] This utility model relates to the field of medical and rehabilitation equipment technology, and more specifically, to a foldable small mobility scooter. Background Technology

[0002] With the continuous increase in the aging population in China and the growing demand for diversified mobility among people with disabilities, wheelchairs, or various types of human-powered or electric mobility scooters, have gradually become an indispensable tool for transportation and rehabilitation in the market. The main structural components of common mobility scooters on the market include: a frame, an electric drive assembly, and a seating assembly. The electric drive assembly typically includes a battery, motor, transmission mechanism, and wheelset. The seating assembly mainly consists of seats of various structures and designs. Commonly used frames include fixed and folding types, with folding designs being the primary choice for everyday home use due to their excellent folding and storage capabilities, making them convenient for transportation and easy to use.

[0003] The folding and storage performance of commuter vehicles with folding frames is mainly achieved through the coordinated action of various mechanisms in the frame and seat. Current folding designs generally have the following drawbacks: the folding and unfolding operations are complicated; or when the folding operation is relatively simple, the structural design may involve many parts and complicated assembly.

[0004] In summary, existing folding mobility scooter designs suffer from complex structures and numerous technical problems related to folding, which restricts operation and makes them inconvenient. Utility Model Content

[0005] The technical problem to be solved by this utility model is that existing folding mobility scooters have complex structures and many limitations in operation due to folding.

[0006] To address the aforementioned problems, this utility model provides a foldable small mobility scooter, comprising a frame, an electric drive assembly, and a seat assembly. The seat assembly includes a rotatable backrest and a seat plate. Two sets of linkage mechanisms with a predetermined spacing are connected between the bottom of the seat plate and the frame. Each linkage mechanism includes a first link and a second link distributed in parallel. The two ends of each of the first and second links are rotatably connected to the seat plate and the frame, respectively. Rotation of the first and second links adjusts the distance between the seat plate and the frame for folding or unfolding the scooter. A third link is rotatably connected to the second link near its connection point with the seat plate. A fourth link is rotatably connected to the other end of the third link. The middle of the fourth link is rotatably connected to the end of the seat plate, and the other end of the fourth link is fixedly connected to the end of the backrest at a predetermined angle. Rotation of the second link drives the backrest to unfold or fold relative to the seat plate.

[0007] This utility model of a folding mobility scooter, based on common basic designs, provides a novel docking design between the seat and the frame. The seat back and seat plate are rotatably connected, and through a linkage mechanism, the rotation of the seat back relative to the seat plate is linked to the linkage between the seat plate and the frame. This allows the seat back to simultaneously move towards the seat plate as the seat folds towards the frame. When the distance between the seat plate and the frame reaches its minimum, the seat back also rests against the top surface of the seat plate. Specifically, the seat plate and the frame are connected by two sets of identical linkages. Each set consists of two parallel connecting rods. This design ensures stable support by keeping the two connecting rods vertical when the seat is open. Furthermore, the parallel support rods can be easily rotated around their axis to adjust the distance between the seat and the frame. In summary, this novel folding mobility scooter allows for convenient folding and storage of the seat, folding the seat tightly against the frame and backrest in one operation. This effectively solves the problem of complex folding and storage designs and inconvenient operation in common folding mobility scooter designs, making it difficult to easily and completely fold and store the scooter.

[0008] As a preferred embodiment, upper hinge platforms are provided on both sides of the bottom surface of the seat plate at positions corresponding to the linkage mechanism, the end of the second link is rotatably connected to the upper hinge platform, and the end of the first link is rotatably connected to the upper hinge platform at a predetermined distance; lower hinge platforms are provided on both sides of the top surface of the frame at positions corresponding to the linkage mechanism, and the other ends of the first link and the second link are rotatably connected to the lower hinge platforms.

[0009] This design further optimizes the connection and cooperation between the seat plate and the frame and the linkage assembly in the above design. A protruding hinge platform structure is set at the position connecting the two linkages. The hinge platform is preferably integrally connected and fixed with the seat plate or frame. The hinge platform provides a structurally robust hinge position, ensuring the strength of the rotating structure and ensuring that the relative position between the linkages is suitable for the height adjustment of the seat plate.

[0010] As a preferred embodiment, the upper hinge platform is provided with a locking and limiting mechanism for locking the angle of the linkage mechanism. The locking and limiting mechanism includes a limiting elongated hole located on the upper hinge platform and a columnar positioning pin. The positioning pin can slide through the limiting elongated hole. The end of the first connecting rod is provided with a positioning slot. The shape of the slot is adapted to the outer contour shape of the positioning pin. The positioning pin is engaged with the positioning slot to fix the angle of the first connecting rod relative to the seat plate.

[0011] This design provides an optimal locking and limiting mechanism to ensure accurate fixation of the angular position of the linkage assembly after it is unfolded, thus ensuring the stable and secure position of the seat and guaranteeing the usability of the scooter. Specifically, a limiting elongated hole is provided on the upper hinge platform corresponding to the end of the first linkage. A positioning pin passes vertically through the limiting elongated hole and can slide along the length of the hole. A positioning slot with a suitable depth is provided at the end of the first linkage. When the first linkage is fully unfolded, the positioning slot and the limiting elongated hole are aligned, allowing the positioning pin in the limiting elongated hole to sink into the positioning slot. In this state, the positioning pin fixes the position of the first linkage, preventing it from rotating and thus fixing the seat height. When folding is required, the positioning pin is moved to disengage from the positioning slot, releasing the position lock on the first linkage. This design is convenient to use and provides stable positioning.

[0012] As a preferred embodiment, a tension spring is connected to the positioning pin, which pulls the positioning pin into the positioning slot and locks it in place; the positioning pins of the two sets of linkage mechanisms are integrally formed to form a rod-shaped positioning rod, which is perpendicular to the first link. A crossbar is connected between the first links of the two sets of linkage mechanisms, and the crossbar is parallel to the positioning rod and spaced at a preset distance.

[0013] To ensure the positioning pin automatically enters the positioning slot when it aligns with the limiting hole, a tension spring is connected to the positioning pin, causing it to naturally tend to move into the positioning slot under the action of the spring force. Furthermore, to simplify the locking and limiting of the basic design of the double linkage mechanism, the positioning pins of the two linkage mechanisms are connected into one rod, and another parallel crossbar is set near the positioning rod. The structure of the crossbar can assist in the use of the positioning rod. Simply pull the positioning rod away from the crossbar to disengage the positioning pin from the positioning slot. This design is simple and easy to operate.

[0014] As a preferred embodiment, the outer contour of the first connecting rod on the side above the positioning slot is arc-shaped, which guides the positioning pin to slide into the positioning slot. This design is adapted to the design of the aforementioned tension spring and positioning rod, and optimizes the structure near the positioning slot location at the end of the first connecting rod. The outer edge contour of the end of the first connecting rod on the upper side of the positioning slot is arc-shaped. After the positioning pin is dislodged from the positioning slot, the positioning pin will press against the side edge of the top of the first connecting rod under the elastic force of the tension spring. The arc-shaped side edge of the first connecting rod can reduce the friction between it and the positioning pin, making it easier to guide the positioning pin into the positioning slot.

[0015] As a preferred embodiment, the second link has a fixed adapter plate at its end where it connects to the seat plate. The adapter plate has two pin joints spaced at predetermined intervals, used for rotatable connection with the upper hinge platform and the third link, respectively. This design optimizes the connection structure between the second link, the third link, and the seat plate, by specifically providing an adapter plate integrally connected to the end of the second link. This structure ensures sufficient spacing between the end of the second link and the two connection points of the seat plate and the third link, suitable for the requirement that the second link drives the chair back to rotate and fold.

[0016] As a preferred embodiment, an armrest is provided on each side of the seat, and a seat support beam is provided at the bottom of the seat. The base of the armrest is rotatably connected to the end of the support beam via an armrest adapter mechanism. This design optimizes the seat by providing a seat support beam at the bottom of the seat to increase its strength, and by connecting rotatable armrests at both ends of the support beam to improve the user experience and facilitate getting on and off the seat from the side.

[0017] As a preferred embodiment, a limiting plate is fixedly connected to the end of the seat support beam, and a limiting sleeve is integrally connected and fixed to the base of the handrail component. A rotation limiting groove is provided on the inner peripheral wall of the limiting sleeve, and the limiting plate is rotatably disposed in the rotation limiting groove. The limiting sleeve is rotatably connected to the center of the limiting plate through a pin, and the relative rotation angle range between the two is limited by the cooperation between the limiting plate and the rotation limiting groove.

[0018] This design provides a connection and fit method for a rotatable handrail structure. A fixed limiting plate is set at the end of the seat support beam, and a limiting sleeve is set at the end of the handrail. A rotation limiting groove is set on one end face of the limiting sleeve. The shape of the groove matches the shape of the limiting plate. The shape of the groove reserves rotation space for the limiting plate, so that the handrail is blocked and limited after rotating to the preset limit position. It is suitable for the two position states of the handrail being folded or unfolded.

[0019] As a preferred embodiment, the limiting plate is provided with an arc-shaped groove centered on the pin shaft, and both ends of the arc-shaped groove are connected to positioning holes with an outer diameter larger than the width of the arc-shaped groove; one side of the limiting sleeve is provided with an elastic pin at the position corresponding to the arc-shaped groove, the elastic pin passes through the arc-shaped groove, and the end of the elastic pin facing the limiting plate is provided with a radially enlarged end structure, the outer diameter of the end structure matching the diameter of the positioning hole.

[0020] This design is a further structural optimization based on the above technical solution, setting up a convenient handrail component positioning structure. Specifically, it is achieved through the cooperation of an arc-shaped sliding groove and an elastic pin. The arc-shaped sliding groove is designed with a narrow middle and radially enlarged positioning holes at both ends. The corresponding elastic pin adopts a structure with a narrow middle and enlarged ends. The radial dimension of the middle part of the elastic pin is adapted to the groove width of the arc-shaped sliding groove, and the radial dimension of the end of the elastic pin is matched with the diameter of the positioning hole. The concave and convex cooperation of the two can fix the position of the elastic pin at the position of the positioning hole, and the handrail component positions corresponding to the two positioning holes are the two position poles. Attached Figure Description

[0021] Figure 1 A schematic diagram of the overall structure of a foldable small mobility scooter provided by this utility model; Figure 2 for Figure 1 A partial structural diagram of the frame of a medium-sized folding mobility scooter; Figure 3 for Figure 1 A structural diagram of the frame of a mid-sized folding mini mobility scooter from another angle; Figure 4 for Figure 1 A partially enlarged structural diagram of the frame of a medium-sized folding mobility scooter.

[0022] in, Figures 1-4 middle: 1. Frame; 2. Seat assembly; 2-1. Seat back; 2-2. Seat plate; 2-3. Seat support beam; 3. Linkage mechanism; 3-1. First link; 3-2. Second link; 3-3. Third link; 3-4. Fourth link; 3-5. Adapter plate; 3-6. Upper hinge platform; 3-7. Lower hinge platform; 4. Armrest assembly; 4-1. Positioning pin; 4-2. Positioning slot; 4-3. Limiting elongated hole; 4-4. Positioning rod; 4-5. Tension spring; 4-6. Crossbar; 5. Armrest adapter mechanism; 5-1. Limiting sleeve; 5-2. Limiting plate; 5-3. Elastic pin; 5-4. Arc-shaped slide groove; 5-5. Positioning hole. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] Before providing a detailed explanation of the working principle of this utility model, further clarification is needed regarding its description: In this description, terms such as "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a welded connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] refer to Figures 1-4 The following examples illustrate this. Figure 1 A schematic diagram of the overall structure of a foldable small mobility scooter provided by this utility model; Figure 2 for Figure 1 A partial structural diagram of the frame of a medium-sized folding mobility scooter; Figure 3 for Figure 1 A structural diagram of the frame of a mid-sized folding mini mobility scooter from another angle; Figure 4 for Figure 1 A partially enlarged structural diagram of the frame of a medium-sized folding mobility scooter.

[0027] This utility model provides a foldable small mobility scooter, including a frame 1, an electric drive assembly, and a seat assembly 2. The seat assembly 2 includes a relatively rotatable backrest 2-1 and a seat 2-2. Two sets of linkage mechanisms 3 with a predetermined spacing are connected between the bottom of the seat 2-2 and the frame 1. Each linkage mechanism 3 includes a first link 3-1 and a second link 3-2 distributed in parallel. The two ends of each of the first link 3-1 and the second link 3-2 are rotatably connected to the seat 2-2 and the frame 1, respectively. The rotation of 2 adjusts the distance between the seat plate 2-2 and the frame 1 for folding or unfolding the vehicle body; the second link 3-2 is rotatably connected to the third link 3-3 near its connection position with the seat plate 2-2, and the other end of the third link 3-3 is rotatably connected to the fourth link 3-4. The middle part of the fourth link 3-4 is rotatably connected to the end of the seat plate 2-2, and the other end of the fourth link 3-4 is fixedly connected to the end of the backrest 2-1 at a preset angle, so that the rotation of the second link 3-2 drives the backrest 2-1 to unfold or fold relative to the seat plate 2-2.

[0028] This utility model of a folding mobility scooter, based on common basic designs, provides a novel docking design between the seat and the frame 1. The backrest 2-1 and the seat 2-2 are rotatably connected. Through a linkage mechanism, the rotation of the backrest 2-1 relative to the seat 2-2 is linked to the linkage between the seat 2-2 and the frame 1. This allows the backrest 2-1 to simultaneously move towards the seat 2-2 during the folding process as the seat 2-1 folds towards the frame 1. When the distance between the seat 2-2 and the frame 1 reaches its minimum, the backrest 2-1 also presses against the top surface of the seat 2-2. Specifically, the seat 2-2 and the frame 1... The seat and frame 1 are connected by two sets of identical connecting rods, each consisting of two parallel rods. This design ensures stable support by keeping the two rods vertical when the seat is open. The parallel support rods can also be easily rotated around an axis to adjust the distance between the seat plate 2-2 and the frame 1. In summary, this new type of folding mobility scooter can easily fold and store the seat, completing the folding of the seat plate 2-2 against the frame 1 and the backrest 2-1 in one go. This effectively solves the problem that common folding mobility scooter designs have complex folding and storage structures and are inconvenient to operate, making it difficult to easily and completely fold and store the scooter.

[0029] In the technical solution provided in this embodiment, upper hinge platforms 3-6 are provided on both sides of the bottom surface of the seat plate 2-2 at positions corresponding to the linkage mechanism 3, the end of the second link 3-2 is rotatably connected to the upper hinge platform 3-6, and the end of the first link 3-1 is rotatably connected to the upper hinge platform 3-6 at a preset distance; lower hinge platforms 3-7 are provided on both sides of the top surface of the frame 1 at positions corresponding to the linkage mechanism 3, and the other ends of the first link 3-1 and the second link 3-2 are rotatably connected to the lower hinge platform 3-7.

[0030] This design further optimizes the connection and cooperation between the seat plate 2-2 and the frame 1 and the linkage group in the above design. A protruding hinge platform structure is set at the position connecting the two linkages. The hinge platform is preferably integrally connected and fixed with the seat plate 2-2 or the frame 1. The hinge platform provides a structurally strong hinge position, ensuring the strength of the rotating structure and ensuring that the relative position between the linkages is suitable for the height adjustment of the seat plate 2-2.

[0031] In the technical solution provided in this embodiment, the upper hinge platform 3-6 is provided with a locking and limiting mechanism for locking the angle of the linkage mechanism 3. The locking and limiting mechanism includes a limiting elongated hole 4-3 located on the upper hinge platform 3-6 and a columnar positioning pin 4-1. The positioning pin 4-1 can slide through the limiting elongated hole 4-3. The end of the first link 3-1 is provided with a positioning slot 4-2. The shape of the slot 4-2 is adapted to the outer contour shape of the positioning pin 4-1. The positioning pin 4-1 is inserted into the positioning slot 4-2 to fix the angle of the first link 3-1 relative to the seat plate 2-2.

[0032] This design provides a preferred locking and limiting mechanism to ensure that the angular position of the linkage assembly can be accurately fixed after the linkage assembly is unfolded, making the seat position stable and secure after unfolding, thus ensuring the usability of the mobility scooter. Specifically, a limiting elongated hole 4-3 is set on the upper hinge platform 3-6 at the position corresponding to the end of the first linkage 3-1. A positioning pin 4-1 is vertically inserted into the limiting elongated hole 4-3 and can slide along the length of the elongated hole. A positioning slot 4-2 with a suitable depth for positioning is set at the end of the first linkage 3-1. When the first linkage 3-1 is fully unfolded, the positioning slot 4-2 is aligned with the limiting elongated hole 4-3, so that the positioning pin 4-1 in the limiting elongated hole 4-3 can sink into the positioning slot 4-2. In this state, the positioning pin 4-1 fixes the position of the first linkage 3-1, preventing it from rotating and thus fixing the seat height. When folding is required, the positioning pin 4-1 is moved to disengage from the positioning slot 4-2, thereby releasing the position lock of the first linkage 3-1. It is convenient to use and provides stable positioning.

[0033] In the technical solution provided in this embodiment, a tension spring 4-5 is connected to the positioning pin 4-1. The tension spring 4-5 pulls the positioning pin 4-1 into the positioning slot 4-2 and locks it in place. The positioning pins 4-1 of the two sets of linkage mechanisms 3 are integrally formed to form a rod-shaped positioning rod 4-4. The positioning rod 4-4 is perpendicular to the first link 3-1. A crossbar 4-6 is connected between the first link 3-1 of the two sets of linkage mechanisms 3. The crossbar 4-6 and the positioning rod 4-4 are parallel to each other and spaced apart by a preset distance.

[0034] To ensure that the positioning pin 4-1 automatically enters the positioning slot 4-2 when the positioning slot 4-2 is aligned with the limiting elongated hole 4-3, a tension spring 4-5 is connected to the positioning pin 4-1, causing the positioning pin 4-1 to naturally tend to move inward into the positioning slot 4-2 under the action of the elastic force. In order to simplify the locking and limiting of the basic design of the double linkage mechanism 3, the positioning pins 4-1 of the two linkage mechanisms 3 are connected into one rod, and another parallel crossbar 4-6 is set near the positioning rod 4-4. The structure of the crossbar 4-6 can assist the use of the positioning rod 4-4. Simply pull the positioning rod 4-4 away from the crossbar 4-6 to make the positioning pin 4-1 disengage from the positioning slot 4-2. This design is simple and easy to operate.

[0035] In the technical solution provided in this embodiment, the outer contour of the first connecting rod 3-1 on the side above the positioning slot 4-2 is arc-shaped, which is used to guide the positioning pin 4-1 to slide into the positioning slot 4-2. This design is adapted to the design of the above-mentioned tension spring 4-5 and positioning rod 4-4, and optimizes the structure of the end of the first connecting rod 3-1, which is located near the positioning slot 4-2. The outer edge contour of the end of the first connecting rod 3-1 on the upper side of the positioning slot 4-2 is arc-shaped. After the positioning pin 4-1 is dislodged from the positioning slot 4-2, the positioning pin 4-1 will press against the side edge of the top of the first connecting rod 3-1 under the elastic force of the tension spring 4-5. The arc-shaped side edge of the first connecting rod 3-1 can reduce the friction between it and the positioning pin 4-1, which facilitates guiding the positioning pin 4-1 into the positioning slot 4-2.

[0036] In the technical solution provided in this embodiment, a transition plate 3-5 is fixedly connected to the end of the second link 3-2 that connects to the seat plate 2-2. Two pin joints are distributed at a predetermined distance on the transition plate 3-5, which are used for rotatable connection with the upper hinge platform 3-6 and the third link 3-3, respectively. This design optimizes the connection structure between the second link 3-2, the third link 3-3, and the seat plate 2-2. A transition plate 3-5 is specifically designed to be integrally connected to the end of the second link 3-2. This structure ensures sufficient spacing between the end of the second link 3-2 and the two connection points of the seat plate 2-2 and the third link 3-3, meeting the requirement that the second link 3-2 drives the chair back 2-1 to rotate and fold.

[0037] In the technical solution provided in this embodiment, an armrest 4 is provided on each side of the seat plate 2-2, and a seat support beam 2-3 is provided at the bottom of the seat plate 2-2. The base of the armrest 4 and the end of the support beam are rotatably connected through an armrest adapter mechanism 5. This design optimizes the seat. The seat support beam 2-3 at the bottom of the seat plate 2-2 increases the strength of the seat, and the rotatable armrest 4 is connected to both ends of the seat support beam 2-3, improving the user experience of the seat and making it easier to get on and off from the side of the seat.

[0038] In the technical solution provided in this embodiment, the end of the seat support beam 2-3 is fixedly connected to a limiting plate 5-2, and the base of the handrail component 4 is integrally connected to a limiting sleeve 5-1. The inner peripheral wall of the limiting sleeve 5-1 is provided with a rotation limiting groove, and the limiting plate 5-2 is rotatably disposed in the rotation limiting groove. The limiting sleeve 5-1 is rotatably connected to the center of the limiting plate 5-2 through a pin, and the relative rotation angle range between the two is limited by the cooperation between the limiting plate 5-2 and the rotation limiting groove.

[0039] This design provides a connection and engagement method for a rotatable handrail component 4. A fixed limiting plate 5-2 is set at the end of the seat support beam 2-3, and a limiting sleeve 5-1 is set at the end of the handrail component 4. A rotation limiting groove is set on one end face of the limiting sleeve 5-1. The shape of the groove matches the shape of the limiting plate 5-2. The shape of the groove reserves rotation space for the limiting plate 5-2, so that the handrail component 4 is blocked and limited after rotating to the preset limit position, which is suitable for the two position states of the handrail component 4 being folded or unfolded.

[0040] In the technical solution provided in this embodiment, the limiting plate 5-2 is provided with an arc-shaped slide groove 5-4 centered on the pin shaft. Both ends of the arc-shaped slide groove 5-4 are connected to positioning holes 5-5 with an outer diameter larger than the width of the arc-shaped slide groove 5-4. On one side of the limiting sleeve 5-1, an elastic pin 5-3 is provided at the position corresponding to the arc-shaped slide groove 5-4. The elastic pin 5-3 passes through the arc-shaped slide groove 5-4. The elastic pin 5-3 has a radially enlarged end structure at the end facing the limiting plate 5-2. The outer diameter of the end structure matches the diameter of the positioning hole 5-5.

[0041] This design is a further structural optimization based on the above technical solution, setting a convenient position fixing structure for the handrail component 4. Specifically, it is achieved through the cooperation of an arc-shaped sliding groove and an elastic pin 5-3. The arc-shaped sliding groove 5-4 is designed with a narrow middle and radially enlarged positioning holes 5-5 at both ends. The corresponding elastic pin 5-3 adopts a structure with a narrow middle and enlarged ends. The radial dimension of the middle part of the elastic pin 5-3 is adapted to the groove width of the arc-shaped sliding groove 5-4, and the radial dimension of the end of the elastic pin 5-3 is matched with the diameter of the positioning hole 5-5. The concave and convex cooperation of the two can fix the position of the elastic pin 5-3 in the position of the positioning hole 5-5, and the positions of the handrail component 4 corresponding to the two positioning holes 5-5 are the two position poles.

[0042] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A folding miniature mobility scooter, comprising a frame (1), an electric drive assembly, and a seat assembly (2), said seat assembly (2) comprising a backrest (2-1) and a seat plate (2-2) that can rotate relative to each other, characterized in that, The bottom of the seat plate (2-2) is connected to the frame (1) by two sets of linkage mechanisms (3) with a preset distance between them. Each linkage mechanism (3) includes a first link (3-1) and a second link (3-2) distributed in parallel. The two ends of the first link (3-1) and the second link (3-2) are respectively rotatably connected to the seat plate (2-2) and the frame (1). The distance between the seat plate (2-2) and the frame (1) can be adjusted by rotating the first link (3-1) and the second link (3-2) to store or unfold the vehicle body. The second link (3-2) is rotatably connected to a third link (3-3) near its connection position with the seat plate (2-2). The other end of the third link (3-3) is rotatably connected to a fourth link (3-4). The middle part of the fourth link (3-4) is rotatably connected to the end of the seat plate (2-2). The other end of the fourth link (3-4) is fixedly connected to the end of the backrest (2-1) at a preset angle. The rotation of the second link (3-2) drives the backrest (2-1) to unfold or fold relative to the seat plate (2-2).

2. The folding mini mobility scooter according to claim 1, characterized in that, On both sides of the bottom surface of the seat plate (2-2), upper hinge platforms (3-6) are provided at positions corresponding to the linkage mechanism (3). The end of the second link (3-2) is rotatably connected to the upper hinge platform (3-6), and the end of the first link (3-1) is rotatably connected to the upper hinge platform (3-6) at a predetermined distance. On both sides of the top surface of the frame (1), lower hinge platforms (3-7) are provided at positions corresponding to the linkage mechanism (3). The other ends of the first link (3-1) and the second link (3-2) are rotatably connected to the lower hinge platform (3-7).

3. The folding mini mobility scooter according to claim 2, characterized in that, The upper hinge platform (3-6) is provided with a locking and limiting mechanism for locking the angle of the connecting rod assembly (3). The locking and limiting mechanism includes a limiting elongated hole (4-3) and a columnar positioning pin (4-1) located on the upper hinge platform (3-6). The positioning pin (4-1) can slide through the limiting elongated hole (4-3). The end of the first connecting rod (3-1) is provided with a positioning slot (4-2). The shape of the slot (4-2) is adapted to the outer contour shape of the positioning pin (4-1). The positioning pin (4-1) is inserted into the positioning slot (4-2) to fix the angle of the first connecting rod (3-1) relative to the seat plate (2-2).

4. The folding mini mobility scooter according to claim 3, characterized in that, A tension spring (4-5) is connected to the positioning pin (4-1). The tension spring (4-5) pulls the positioning pin (4-1) into the positioning slot (4-2) and locks it in place. The positioning pins (4-1) of the two sets of linkage mechanisms (3) are integrally formed to form a rod-shaped positioning rod (4-4). The positioning rod (4-4) is perpendicular to the first link (3-1). A crossbar (4-6) is connected between the first link (3-1) of the two sets of linkage mechanisms (3). The crossbar (4-6) is parallel to the positioning rod (4-4) and is spaced at a preset distance.

5. The folding mini mobility scooter according to claim 3, characterized in that, The outer contour of the first connecting rod (3-1) on the side above the positioning slot (4-2) is arc-shaped, which is used to guide the positioning pin (4-1) to slide into the positioning slot (4-2).

6. The folding mini mobility scooter according to claim 2, characterized in that, The second connecting rod (3-2) has a fixed adapter plate (3-5) at the end where it connects to the seat plate (2-2). The adapter plate (3-5) has two pin contacts distributed at a preset distance, which are used to rotatably connect with the upper hinge platform (3-6) and the third connecting rod (3-3), respectively.

7. The folding mini mobility scooter according to any one of claims 1-6, characterized in that, Each side of the seat plate (2-2) is provided with an armrest (4), and the bottom of the seat plate (2-2) is provided with a seat support beam (2-3). The base of the armrest (4) and the end of the support beam are rotatably connected through an armrest transfer mechanism (5).

8. The folding mini mobility scooter according to claim 7, characterized in that, The end of the seat support beam (2-3) is fixedly connected to a limiting plate (5-2), and the base of the handrail (4) is integrally connected to a limiting sleeve (5-1). The inner circumferential wall of the limiting sleeve (5-1) is provided with a rotation limiting groove. The limiting plate (5-2) is rotatably disposed in the rotation limiting groove. The limiting sleeve (5-1) is rotatably connected to the center of the limiting plate (5-2) by a pin. The relative rotation angle range between the limiting plate (5-2) and the rotation limiting groove is limited by the cooperation between the limiting plate (5-2) and the rotation limiting groove.

9. The folding mini mobility scooter according to claim 8, characterized in that, The limiting plate (5-2) is provided with an arc-shaped groove (5-4) centered on the pin. Both ends of the arc-shaped groove (5-4) are connected to positioning holes (5-5) with an outer diameter larger than the width of the arc-shaped groove (5-4). On one side of the limiting sleeve (5-1), an elastic pin (5-3) is provided at a position corresponding to the arc-shaped groove (5-4). The elastic pin (5-3) passes through the arc-shaped groove (5-4). The elastic pin (5-3) has a radially enlarged end structure at one end facing the limiting plate (5-2). The outer diameter of the end structure matches the diameter of the positioning hole (5-5).

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