Seat capable of lifting and prolonging pedal and used for riding instead of walk

Abstract

The invention relates to the field of seats for riding instead of walking, in particular to a seat for riding instead of walking capable of lifting and prolonging a pedal, which comprises a seat frame, a leg lifting frame rotationally connected to the front end of the seat frame, a leg cushion pedal device connected to the leg lifting frame in a sliding manner, and a leg lifting driving assembly mounted in the seat frame and used for driving the leg lifting frame to ascend or descend, the transmission assembly is arranged among the leg lifting frame, the seat frame and the leg cushion pedal device, the transmission assembly enables the leg cushion pedal device to extend when the leg lifting frame ascends and to retract when the leg lifting frame descends, the leg cushion pedal device further comprises a first transmission wheel, a second transmission wheel and other parts, and the leg cushion pedal device comprises a telescopic frame, a leg cushion leg blocking part, a pedal part and the like. And all the parts have corresponding connection and arrangement modes. According to the multifunctional chair, the functions of lifting the leg lifting frame of the chair and prolonging the leg cushion pedal device can be achieved, the requirements of different users can be met, and the use comfort and convenience are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of scooters, in particular to a scooter seat capable of lifting and extending the pedal. BACKGROUND

[0002] As a convenient means of transportation, scooters have been widely used in modern society. With the increasing demand for comfort and functionality of travel, the design of scooter seats has also attracted more and more attention. A comfortable seat can effectively reduce the fatigue of the driver and improve the travel experience, especially for people who need to use the scooter for a long time. The comfort and functionality of the seat are particularly important. At the same time, a reasonable seat design can also improve the overall performance and safety of the scooter, so the research and improvement of the scooter seat have important practical significance.

[0003] In traditional scooter seat design, in order to meet the needs of different users, especially in terms of leg support and comfort, some conventional technical means are usually adopted. One common way is to design a fixed-angle leg support structure, which can provide support for the driver's legs to some extent, but lacks flexibility and cannot be adjusted according to the physical condition and usage habits of different users. Another way is to use a simple adjustable leg support device to change the angle and position of the leg support by manual adjustment, but this adjustment method is more cumbersome to operate and has limited adjustment range. In addition, some seats use more complex mechanical structures to achieve leg support adjustment, but these structures are often large in size and take up more space, affecting the overall layout and convenience of the scooter.

[0004] However, these existing scooter seat adjustment methods have obvious defects. The traditional fixed-angle leg support structure cannot meet the individual needs of different users, and its support effect is not good for some users who need more comfortable leg support. Although the manually adjustable leg support device has some flexibility, it is inconvenient to operate and has low adjustment accuracy. The complex mechanical structure has improved the adjustment function, but the size and space occupation limit its application on the scooter, making it impossible to provide a flexible and convenient leg support adjustment solution that does not take up too much space. SUMMARY

[0005] In order to solve the problem of large space occupation and insufficient flexibility of the leg support device in the prior art, the present application provides a scooter seat capable of lifting and extending the pedal.

[0006] The scooter seat provided by the present application adopts the following technical solution: A seat for walking with a pedal that can be lifted and extended, comprising: a seat frame; a leg lifting frame rotatably connected to the front end of the seat frame; a leg pad pedal device slidably connected to the leg lifting frame; a leg lifting driving assembly installed in the seat frame and used to drive the leg lifting frame to rise or fall; a transmission assembly arranged between the leg lifting frame, the seat frame and the leg pad pedal device, wherein the transmission assembly is used to release the leg pad pedal device to be slidably extended when the leg lifting frame rises, and actively drive the leg pad pedal device to be shortened when the leg lifting frame falls.

[0007] By adopting the above technical scheme, the lifting / falling action of the leg lifting frame and the extending / shortening action of the leg pad pedal device are linked by the unique transmission assembly. When the user needs to lift the leg to obtain a more comfortable posture, the position of the transmission assembly changes, and the user can drive the leg pad pedal device to extend forward according to the own demand, so as to adapt to the demand for the support length after the leg is stretched, so that the user can adjust the extension position of the leg pad pedal device according to the own leg length. Conversely, when the leg is lowered, the pedal is automatically retracted. The integrated linkage design realizes the synchronous self-adaptive adjustment of the leg support angle and length, without the need for the user to perform secondary manual operation, greatly improving the operation convenience and the riding comfort, and providing a more humanized and ergonomic leg support experience.

[0008] Optionally, the transmission assembly comprises: a guide rail installed in the seat frame; a transmission shaft slidably connected in the guide rail; a first connecting rod having one end fixedly connected to the transmission shaft; a second connecting rod having one end hingedly connected to the first connecting rod away from the transmission shaft, and the other end fixedly connected to the leg lifting frame; a connecting piece having one end fixedly connected to the first connecting rod and the other end fixedly connected to the leg pad pedal device around the transmission shaft.

[0009] By adopting the above technical scheme, a specific and reliable mechanical transmission structure is provided. The structure uses the geometric motion relationship of the simple connecting rod mechanism (the first connecting rod and the second connecting rod) to accurately convert the rotary motion of the leg lifting frame into the linear reciprocating motion of the transmission shaft along the guide rail, and then transmits the linear motion to the leg pad pedal device through the connecting piece, so as to realize the linkage. The scheme has clear structure, small space occupation, reliable transmission and lower cost, and ensures the stable realization of the linkage effect.

[0010] Optionally, the transmission assembly further comprises a first transmission wheel and a second transmission wheel, the first transmission wheel is located at the front end of the seat frame, the second transmission wheel is located at the top of the leg lifting frame, and one end of the connecting member passes through the transmission shaft, then passes through the first transmission wheel and the second transmission wheel respectively, and is connected to the leg pad pedal device from top to bottom.

[0011] By adopting the above technical scheme, the first and second transmission wheels are added to optimize the path of the connecting member (such as a rope or a belt). This not only changes the direction of force transmission, ensures that the connecting member can smoothly and efficiently apply pulling force or pushing force to the leg pad pedal device, but also effectively reduces the friction and wear of the connecting member during movement, making the entire linkage process smoother, labor-saving, and prolonging the service life of the transmission assembly.

[0012] Optionally, the guide rail is a " " type guide rail with an opening on one side, the guide rail is provided as at least two, and the " " type openings of the two guide rails are oppositely arranged, and the part of the connecting member at the bottom of the seat frame is located between the openings of the two " " type guide rails.

[0013] By adopting the above technical scheme, the specific guide rail structure and layout are adopted, which on the one hand provides stable and precise linear guidance for the transmission shaft to prevent it from deflecting or shaking during sliding, and on the other hand, a protected channel is formed between the two guide rails for accommodating the connecting member, which can effectively prevent the connecting member from interfering, winding or being accidentally damaged with other components, and improve the safety and reliability of the entire mechanism operation.

[0014] Optionally, the transmission assembly is arranged at the center bottom of the seat frame after passing through the top of the leg lifting frame.

[0015] By adopting the above technical scheme, the transmission assembly is arranged at the center bottom of the seat frame, which can make the force transmission more balanced and symmetrical, avoid the distortion of the seat frame or the leg lifting frame caused by eccentric force, ensure the stability and consistency of the lifting and stretching action, and improve the overall stability of the structure.

[0016] Optionally, the leg lifting driving assembly comprises a telescopic member and a driving link, one end of the telescopic member is hinged to the seat frame, the other end is hinged to the driving link, and the other end of the driving link is fixedly connected to the leg lifting frame.

[0017] By adopting the above technical scheme, a mature and reliable electric driving mode is provided. The telescopic member (such as an electric push rod) cooperates with the driving link to provide stable and easy-to-control driving force, accurately control the lifting angle and speed of the leg lifting frame, and has simple structure, easy installation and maintenance.

[0018] Optionally, the leg pad pedal device comprises: The telescopic frame is slidingly connected to the leg-lifting frame; The leg pad leg blocking component is fixed to the top of the telescopic frame; The pedal component is fixed to the bottom of the telescopic frame.

[0019] By adopting the above technical scheme, the structure of the leg pad and pedal device is specified, and it is clear that it includes a leg pad part for supporting the lower leg and a pedal part for supporting the foot, both of which are fixed on a telescopic frame. This design can provide comprehensive and continuous support for the user's entire lower leg to the sole of the foot, and the comfort and support effect are better than single pedal or leg pad.

[0020] Optionally, a damping sliding rail is arranged between the telescopic frame and the leg-lifting frame.

[0021] By adopting the above technical scheme, by arranging a damping sliding rail at the sliding connection, the telescopic frame can move more smoothly and controllably during extension and retraction, effectively buffering the impact during start and stop and the vibration during operation, avoiding the harsh jerk feeling, and greatly improving the delicacy and seniority of user experience.

[0022] Optionally, a length adjusting frame is arranged between the telescopic frame and the pedal component, the length adjusting frame is provided with a plurality of mounting holes along the length direction, and a pedal mounting assembly is arranged on the pedal component and detachably connected with the length adjusting frame through the mounting holes.

[0023] By adopting the above technical scheme, a manual fine adjustment mechanism is added on the basis of automatic telescoping. The user can individually preset the initial position of the pedal component according to the specific length of his / her leg. This design takes into account the convenience of automation and the adaptability of individualization, and can meet the precise needs of users of different heights and leg lengths, making the product more universal and ergonomic.

[0024] Optionally, a control module is further included, the control module is electrically connected with the leg-lifting driving assembly, the control module is installed at the bottom of the rear of the seat frame, and the leg-lifting driving assembly is installed at the bottom of the side of the seat frame.

[0025] By adopting the above technical scheme, the electric control system and component layout are reasonably planned. The control module and the driving assembly are arranged at the bottom of the seat, which does not affect the appearance and seating space of the seat, and also facilitates the hiding of wire harness, realizing mechatronics; at the same time, the specific installation position also considers the weight distribution and maintenance convenience, which is a more complete and engineered product design.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The core innovation is to bind the lifting of the leg lifting frame and the extension action of the leg pad footrest device through a transmission assembly, realizing the synchronous adaptive adjustment of the support angle and the support length, greatly improving the convenience, comfort and ergonomic rationality of use.

[0027] 2. A reliable and smooth mechanical transmission scheme is provided: by setting up a transmission assembly composed of guide rails, transmission shafts, connecting rods and transmission wheels, etc., and carrying out centralized layout and path optimization, a mechanical implementation mode with stable structure, smooth transmission and long service life is provided, ensuring the stability and reliability of the linkage function.

[0028] 3. Personalized comfort experience is enhanced: by setting up a damping sliding rail to make the extension process smoother, and adding a pedal component with adjustable length, the product not only has better running quality, but also can accurately match the use needs of users of different body sizes, realizing high personalized customization on the basis of automation, significantly improving the comfort and satisfaction of riding. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a side view of the overall structure of the embodiment of the present application.

[0030] Figure 2 is a bottom view of the overall structure of the embodiment of the present application.

[0031] Figure 3 is another view of the overall structure of the embodiment of the present application.

[0032] Figure 4 is a structure diagram of the leg pad footrest device in the extended state (the connecting piece is hidden).

[0033] BRIEF DESCRIPTION OF DRAWINGS: 10, seat frame; 11, ear plate; 20, leg lifting frame; 30, leg pad footrest device; 31, extension frame; 32, leg pad leg blocking component; 321, waist-shaped hole plate; 33, pedal component; 34, length adjusting frame; 341, mounting hole; 35, footrest mounting assembly; 40, leg lifting driving assembly; 41, extension piece; 42, driving connecting rod; 50, transmission assembly; 51, guide rail; 52, transmission shaft; 53, first connecting rod; 54, second connecting rod; 55, connecting piece; 56, first transmission wheel; 57, second transmission wheel; 60, control module. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings Figures 1-4The technical solutions in the embodiments of the present application are described in further detail. The described embodiments are only possible technical implementations of the present application, but the present application is not limited to this, and other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present application are also within the protection scope of the present application.

[0035] In the embodiments of the present application, the "front end of the seat frame" refers to the side of the seat frame close to the human leg, "releasing the leg pad pedal device to be slidably extended" refers to the leg pad pedal device moving away from the seat frame, and "actively driving the leg pad pedal device to be shortened when the leg lifting frame is lowered" refers to the leg pad pedal device moving close to the seat frame.

[0036] The present application mainly adopts a seat with a pedal that can be lifted and extended, which improves the flexibility and comfort of the scooter seat leg support. The present application is described in further detail as follows.

[0037] The scooter seat provided by the embodiments of the present application can lift and extend the pedal, which is described with reference to Figure 1 and Figure 2 , including a seat frame 10, a leg lifting frame 20, a leg pad pedal device 30, a leg lifting driving assembly 40, and a transmission assembly 50. The leg lifting frame 20 is rotationally connected to the front end of the seat frame 10, the leg pad pedal device 30 is dampingly and slidably connected to the leg lifting frame 20, the leg lifting driving assembly 40 is installed in the seat frame 10 and used to drive the leg lifting frame 20 to rise or fall, and the transmission assembly 50 is arranged between the leg lifting frame 20, the seat frame 10, and the leg pad pedal device 30. The transmission assembly 50 is used to release the leg pad pedal device 30 to be slidably extended when the leg lifting frame 20 rises, and actively drive the leg pad pedal device 30 to be shortened when the leg lifting frame 20 falls. The height and length of the pedal can be flexibly adjusted according to the user's needs, and the riding comfort is improved. This is because the lifting and extension actions of the pedal are related and controllable, and can adapt to the physical conditions and use habits of different users.

[0038] Specifically, the seat frame 10 is the basic support structure of the entire seat, which is generally made of high-strength metal materials such as stainless steel or aluminum alloy to ensure that it can bear the weight of the human body and the force generated by various actions. The shape and size of the seat frame 10 are optimized according to the overall design of the scooter and the ergonomics principle to provide a comfortable riding experience.

[0039] In the embodiments of the present application, the "front end of the seat frame" refers to the side of the seat frame close to the human leg, "releasing the leg pad pedal device to be slidably extended" refers to the leg pad pedal device moving away from the seat frame, and "actively driving the leg pad pedal device to be shortened when the leg lifting frame is lowered" refers to the leg pad pedal device moving close to the seat frame.

[0040] In this embodiment, the leg-lifting frame 20 is in T-shape, and is hinged to the ear plate 11 at both ends, which ensures balance and reduces volume. In other embodiments, the leg-lifting frame 20 can also be in other shapes. The leg-lifting frame 20 can be made of metal pipe or plate. In some alternative designs, the leg-lifting frame 20 can also be made of high-strength plastic material to reduce the overall weight.

[0041] With reference to Figure 2 and Figure 3 , the transmission assembly 50 includes a guide rail 51, a transmission shaft 52, a first connecting rod 53, a second connecting rod 54, and a connecting member 55. The guide rail 51 is installed at the bottom center of the seat frame 10, the transmission shaft 52 is slidably connected to the guide rail 51 at both ends, the first connecting rod 53 is fixedly connected to the transmission shaft 52 at one end, the second connecting rod 54 is hinged to the first connecting rod 53 at the end away from the transmission shaft 52, and the second connecting rod 54 is fixedly connected to the leg-lifting frame 20 at the other end. The fixed point of the second connecting rod 54 and the leg-lifting frame 20 is located below the hinge point of the leg-lifting frame 20 and the ear plate 11.

[0042] Preferably, the guide rail 51 is a “” type guide rail 51 with an opening on one side. The guide rail 51 is provided in at least two pieces, and the “” type openings of the two guide rails 51 are oppositely arranged. Such a design can provide a stable sliding track for the transmission shaft 52. Bearings can be provided at both ends of the transmission shaft 52, and the bearings are slidably connected to the guide rail 51. Optionally, the guide rail 51 can be made of metal material, and the surface thereof is subjected to quenching treatment to improve hardness and wear resistance. The transmission shaft 52 is generally a cylindrical metal rod, and the surface thereof is smooth to reduce friction with the guide rail 51. The second connecting rod 54 can be a part of the leg-lifting frame 20, and is welded to the leg-lifting frame 20.

[0043] With reference to Figure 1 and Figure 2 , one end of the connecting member 55 is fixedly connected to the first connecting rod 53, and the other end passes around the transmission shaft 52 and is fixedly connected to the leg cushion pedal device 30. Optionally, the end of the connecting member 55 can be detachably connected to the first connecting rod 53 or the leg cushion pedal device 30 through a fixing plate, and the fixing plate and the first connecting rod 53 or the leg cushion pedal device 30 jointly clamp the end of the connecting member 55.

[0044] In some optimized designs, the walking seat further includes a first transmission wheel 56 and a second transmission wheel 57. The first transmission wheel 56 is located at the front end of the seat frame 10, and the second transmission wheel 57 is located at the top of the leg-lifting frame 20. After passing around the transmission shaft 52, the connecting member 55 passes around the first transmission wheel 56 and the second transmission wheel 57, respectively, and is connected to the leg cushion pedal device 30 from top to bottom. Such a design can change the transmission direction of the connecting member 55, make the transmission more smooth, and also increase the stability of the transmission. Optionally, the connecting member 55 can be an elastic band, such as a high-strength nylon elastic band, which has good elasticity and wear resistance. The connecting member 55 can also be a steel wire rope.

[0045] Referring to Figure 2 and Figure 3 In a preferred embodiment, the transmission assembly 50 is arranged at the center bottom of the seat frame 10, and the connecting member 55 is arranged between the openings of the two "U" shaped rails 51 at the bottom of the seat frame 10. A protected channel is formed between the two rails 51 for accommodating the connecting member 55, which can effectively prevent the connecting member 55 from interfering with other components, winding or being accidentally damaged, thereby improving the safety and reliability of the entire mechanism.

[0046] Referring to Figure 2 and Figure 4 When the leg lifting function is used, the leg lifting drive assembly 40 is extended to push the leg lifting frame 20 to rise upward around its rotation point. This action is transmitted through the second connecting rod 54 and the first connecting rod 53 to drive the transmission shaft 52 to slide in the rail 51 towards the front end of the seat frame. Since one end of the connecting member 55 is connected to the first connecting rod 53 and passes around the transmission shaft 52, the forward movement of the transmission shaft 52 releases the tension of the connecting member 55, generating an effective length. At this time, the user can easily push the leg pad footrest device 30 along the leg lifting frame 20 to the desired length by applying force to the leg, so as to obtain comfortable support, thereby the user can adjust the extension position of the leg pad footrest device 30 according to the length of the leg.

[0047] It should be noted that when the user adjusts the position of the leg pad footrest device 30 according to the length of the leg, the leg pad footrest device 30 is not in the final stable state, but there is a certain friction force between the leg pad footrest device 30 and the leg lifting frame 20, so that the leg pad footrest device 30 is in a balanced state, which can meet the support requirements of the leg. The final stable state refers to the state that the connecting member 55 is in the longest state at this moment, and the leg pad footrest device 30 is pulled tight by the connecting member 55.

[0048] Conversely, when the leg pad footrest device 30 is to be lowered back to the default state, the leg lifting drive assembly 40 is retracted to pull the leg lifting frame 20 downward, which pushes the first connecting rod 53 and the second connecting rod 54 to slide backward, and the first connecting rod 53 pulls one end of the connecting member 55 to retract backward, and the other end drives the telescopic frame 31 to move backward, so that the leg pad footrest device 30 returns to the initial state.

[0049] Referring to Figure 1Specifically, the leg pad pedal device 30 comprises a telescopic frame 31, a leg pad leg blocking component 32 and a pedal component 33. The telescopic frame 31 is slidingly connected to the leg lifting frame 20, and the telescopic frame 31 and the leg lifting frame 20 have a certain friction force therebetween, so that the leg pad pedal device 30 can be kept stable after being adjusted to a certain position. Preferably, a damping sliding rail is arranged between the telescopic frame 31 and the leg lifting frame 20, which can provide a certain resistance to make the sliding of the telescopic frame 31 more stable, avoiding sudden sliding or shaking. For example, a ball bearing sliding rail or a hydraulic damping sliding rail with appropriate damping coefficient can be selected.

[0050] Preferably, the back of the leg pad leg blocking component 32 is provided with a waist-shaped hole plate 321, and the leg pad leg blocking component 32 is detachably connected to the top of the telescopic frame 31 through the waist-shaped hole plate 321. The position of the leg pad leg blocking component 32 can be manually adjusted through the waist-shaped hole plate 321. The front of the leg pad leg blocking component 32 is used to support and block the leg, and is usually made of soft material such as sponge or rubber, and is wrapped with a layer of comfortable cloth to improve the comfort of the leg. The pedal component 33 is fixed to the bottom of the telescopic frame 31, and is used to place the feet of the user. The pedal component 33 can be made of anti-skid material to increase safety.

[0051] Referring to Figure 1 Preferably, a length adjusting frame 34 is arranged between the telescopic frame 31 and the pedal component 33, and a plurality of mounting holes 341 are formed in the length adjusting frame 34 along the length direction thereof. A pedal mounting assembly 35 is arranged on the pedal component 33 and detachably connected to the length adjusting frame 34 through the mounting holes 341. The length adjusting frame 34 can be made of metal, and is used to further adjust the length of the pedal component 33 to meet the needs of different users. The pedal mounting assembly 35 can be a bolt and a nut, and by selecting different mounting holes 341, the relative position between the pedal component 33 and the telescopic frame 31 can be changed, so as to realize length adjustment.

[0052] Referring to Figure 1 The leg lifting driving assembly 40 comprises a telescopic member 41 and a driving link 42. One end of the telescopic member 41 is hingedly connected to the seat frame 10, and the other end is hingedly connected to the driving link 42. The other end of the driving link 42 is fixedly connected to the leg lifting frame 20. The driving link 42 can be pre-welded to the leg lifting frame 20, and is part of the leg lifting frame 20. The telescopic member 41 can be an electric push rod or a hydraulic push rod. The electric push rod has the advantages of convenient control and high precision, while the hydraulic push rod can provide larger thrust. The driving link 42 is generally made of metal rod, and its length and shape are designed according to the stroke of the telescopic member 41 and the movement requirements of the leg lifting frame 20. Through the telescopic action of the telescopic member 41, the driving link 42 is driven to move, so as to realize the rising or falling of the leg lifting frame 20.

[0053] Preferably, a control module 60 is further included, which is electrically connected with the leg lifting driving assembly 40, and is installed at the bottom rear of the seat frame 10, and the leg lifting driving assembly 40 is installed at the bottom side of the seat frame 10. The control module 60 can be an electronic control unit, which can realize precise control of the leg lifting driving assembly 40 through programming. Users can conveniently control the rising and falling of the leg lifting frame 20 and the extension and shortening of the pedal by operating the buttons or switches on the control module 60.

[0054] The implementation principle of the embodiment is that the design of the seat fully considers the leg support needs of users when riding the scooter, and through the cooperative work of the leg lifting driving assembly 40 and the transmission assembly 50, the pedal lifting and extension functions are realized. Compared with the traditional scooter seat, the design has higher flexibility and comfort, and can be adjusted according to the physical conditions and use habits of different users. At the same time, the mechanical structure adopted is relatively simple, low in cost, and small in size, which does not occupy too much space, and improves the overall use performance and safety of the scooter. After the length adjustment frame 34 is added, the length adjustment of the pedal is more flexible and diverse. Users can adjust the length of the pedal according to their leg length and use habits, which further improves the comfort and applicability of the seat. To some extent, this design makes up for the shortcomings of the traditional seat in length adjustment, and provides users with more personalized choices.

[0055] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A mobility seat with adjustable and extendable pedals, characterized in that, Comprising: A seat frame (10); A leg-lifting frame (20), rotatably connected to the front end of the seat frame (10); A leg pad and footrest device (30), damping and slidably connected to the leg-lifting frame (20); A leg-lifting drive assembly (40), installed inside the seat frame (10) and used to drive the leg-lifting frame (20) to rise or fall; A transmission assembly (50), arranged between the leg-lifting frame (20), the seat frame (10) and the leg pad and footrest device (30). Among them, the transmission assembly (50) is used to release the leg pad and footrest device (30) when the leg-lifting frame (20) rises, so that it can slide and extend; and when the leg-lifting frame (20) falls, it actively drives the leg pad and footrest device (30) to shorten.

2. A mobility seat with a liftable and extendable pedal as described in claim 1, characterized in that, The transmission assembly (50) includes: A guide rail (51), installed inside the seat frame (10); A transmission shaft (52), slidably connected inside the guide rail (51); A first connecting rod (53), one end fixedly connected to the transmission shaft (52); A second connecting rod (54), the end of the first connecting rod (53) far from the transmission shaft (52) is hinged to the second connecting rod (54), and the other end of the second connecting rod (54) is fixedly connected to the leg-lifting frame (20); A connecting member (55), one end fixedly connected to the first connecting rod (53), and the other end bypasses the transmission shaft (52) and is fixedly connected to the leg pad and footrest device (30).

3. A mobility seat with a liftable and extendable pedal as described in claim 2, characterized in that: It further includes a first transmission wheel (56) and a second transmission wheel (57). The first transmission wheel (56) is located at the front end of the seat frame (10), the second transmission wheel (57) is located at the top of the leg-lifting frame (20), and one end of the connecting member (55) bypasses the transmission shaft (52) and then bypasses the first transmission wheel (56) and the second transmission wheel (57) respectively and is connected to the leg pad and footrest device (30) from top to bottom.

4. A mobility seat with a liftable and extendable pedal as described in claim 2, characterized in that: The guide rail (51) is a "C"-shaped guide rail (51) with an opening on one side. At least two guide rails (51) are provided, and the "C"-shaped openings of the two guide rails (51) are arranged opposite to each other. The part of the connecting member (55) at the bottom of the seat frame (10) is located between the openings of the two "C"-shaped guide rails (51).

5. A mobility seat with a liftable and extendable pedal according to claim 2, characterized in that: The transmission assembly (50) is arranged at the center bottom of the seat frame (10) after bypassing the top of the leg-lifting frame (20).

6. A mobility seat with a liftable and extendable pedal according to claim 1, characterized in that: The leg-lifting drive assembly (40) includes a telescopic member (41) and a drive connecting rod (42). One end of the telescopic member (41) is hinged to the seat frame (10), the other end is hinged to the drive connecting rod (42), and the other end of the drive connecting rod (42) is fixedly connected to the leg-lifting frame (20).

7. A mobility seat with a liftable and extendable pedal according to claim 1, characterized in that, The leg pad and footrest device (30) includes: A telescopic frame (31), slidably connected to the leg-lifting frame (20); A leg pad and leg-blocking member (32), fixed to the top of the telescopic frame (31); A pedal member (33), fixed to the bottom of the telescopic frame (31).

8. A mobility seat with a liftable and extendable pedal according to claim 7, characterized in that: A damping slide rail is arranged between the telescopic frame (31) and the leg-lifting frame (20).

9. A mobility seat with a liftable and extendable pedal according to claim 7, characterized in that, A length adjustment frame (34) is provided between the telescopic frame (31) and the pedal component (33). The length adjustment frame (34) has multiple mounting holes (341) along its length direction. A foot pedal mounting assembly (35) is provided on the pedal component (33). The foot pedal mounting assembly (35) is detachably connected to the length adjustment frame (34) through the mounting holes (341).

10. A mobility seat with a liftable and extendable pedal according to claim 1, characterized in that: It also includes a control module (60), which is electrically connected to the leg lift drive assembly (40). The control module (60) is installed at the rear bottom of the seat frame (10), and the leg lift drive assembly (40) is installed at the side bottom of the seat frame (10).

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