Ergonomic reclining wheelchair

Abstract

An ergonomic reclining wheelchair relates to the field of wheelchairs and comprises a frame, a first cushion, a second cushion, a backrest and a linkage mechanism. The first cushion is mounted on the frame, and the first cushion is connected with the second cushion; the second cushion is connected with the backrest through a linkage mechanism, and the linkage mechanism is connected with the frame; the linkage mechanism is used for driving the second seat cushion to rotate relative to the first seat cushion in the first rotating direction when driving the backrest to rotate in the first rotating direction, so that the second seat cushion descends relative to the first seat cushion while the angle between the second seat cushion and the backrest is increased; the linkage mechanism is further used for driving the second cushion to rotate relative to the first cushion in the second rotating direction when driving the backrest to rotate in the second rotating direction, so that the angle between the second cushion and the backrest is reduced, and meanwhile the second cushion ascends relative to the first cushion. The first rotation direction is opposite to the second rotation direction. Muscular soreness is not easy to cause after long-time sitting, and buttock muscles are not easy to extrude when the backrest is adjusted.

Description

Technical Field

[0001] The present invention relates to the field of wheelchairs, and in particular to an ergonomic reclining wheelchair. Background Art Wheelchairs are a means of transportation for patients with stroke, spinal cord injuries, and other chronic disabilities. They help them complete daily activities (such as going up and down stairs and shopping), while promoting circulation and preventing complications through regular movement. Wheelchairs allow users to independently participate in outdoor activities such as socializing and traveling, enhancing their self-confidence and dignity. For example, ergonomic reclining wheelchairs further expand their use cases. Long-term wheelchair use can prevent problems such as muscle atrophy and osteoporosis caused by prolonged sitting. Currently, there are various types and structures of wheelchairs on the market.

[0002] The inventors discovered during their research that the reclining wheelchairs in the prior art have at least the following disadvantages: The wheelchair will squeeze the hip muscles when the back is lying down and rising, causing muscle damage and reducing comfort. Summary of the Invention

[0003] The objectives of the present invention include, for example, providing an ergonomic reclining wheelchair that can alleviate the symptoms of muscle soreness caused by sitting for a long time, and can also reduce the pressure on the buttocks muscles during the user's adjustment process of sitting or lying down, avoid muscle damage, and improve comfort.

[0004] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides an ergonomic reclining wheelchair, comprising: A vehicle frame, a first seat cushion, a second seat cushion, a backrest, and a linkage mechanism; the first seat cushion is mounted on the vehicle frame, and the first seat cushion and the second seat cushion are connected; the second seat cushion and the backrest are connected via the linkage mechanism, and the linkage mechanism is connected to the vehicle frame; The linkage mechanism is used to drive the second seat cushion to rotate relative to the first seat cushion along the first rotation direction when driving the backrest to rotate along the first rotation direction, so that the angle between the second seat cushion and the backrest increases and the second seat cushion descends relative to the first seat cushion; the linkage mechanism is also used to drive the second seat cushion to rotate relative to the first cushion along the second rotation direction when driving the backrest to rotate along the second rotation direction, so that the angle between the second seat cushion and the backrest decreases and the second seat cushion ascends relative to the first cushion; The first rotation direction is opposite to the second rotation direction.

[0005] In an optional embodiment, the linkage mechanism includes a hand pushing handrail, a controllable gas spring, a support rod and a sliding member; one end of the hand pushing handrail is rotatably connected to the sliding member, and the sliding member is slidably connected to the vehicle frame in a preset direction; one end of the controllable gas spring is rotatably connected to the hand pushing handrail, and the other end is rotatably connected to the vehicle frame; one end of the support rod is rotatably connected to the vehicle frame, and the other end of the support rod is rotatably connected to the hand pushing handrail; the connection position of the support rod and the hand pushing handrail is located between the connection position of the controllable gas spring and the hand pushing handrail and the sliding member; The second seat cushion is mounted on the support rod; the backrest is mounted on the hand push armrest; and the preset direction is perpendicular to the extension direction of the rotation axis of the hand push armrest.

[0006] In an optional embodiment, the sliding member includes a mounting seat and two pulleys, and the two pulleys are both mounted on the mounting seat and arranged at intervals; the two pulleys cooperate to clamp the frame, and both pulleys can move on the frame along the preset direction.

[0007] In an optional embodiment, the frame includes a first rod, a second rod and a third rod connected in sequence, the first rod, the second rod and the third rod are all located on the bottom side of the first cushion, the first cushion is mounted on the first rod, and there is a distance between the second rod and the third rod and the first cushion; one end of the support rod is rotatably connected to the second rod; the sliding member is slidably connected to the third rod in the length direction of the third rod.

[0008] In an optional embodiment, the hand-push armrest includes a push rod and two connecting plates, the two connecting plates clamping the push rod and being fixedly connected to the push rod; one end of the support rod extends between the two connecting plates and is rotatably connected to the two connecting plates at the same time; the two connecting plates clamping the sliding member and being rotatably connected to the sliding member.

[0009] In an optional embodiment, the ergonomic reclining wheelchair further includes side armrests, which are transmission-connected to the frame via the linkage mechanism so as to adaptively rotate when the backrest rotates relative to the frame.

[0010] In an optional embodiment, the side guard armrest includes an armrest plate, a side guard member, and a linear telescopic assembly; the armrest plate is connected to the side guard member, one side of the side guard member is rotatably connected to the hand push armrest, the other side of the side guard member is connected to one end of the linear telescopic assembly, and the other end of the linear telescopic assembly is rotatably connected to the vehicle frame; The connection position between the side stopper and the hand push handrail is located above the connection position between the controllable gas spring and the hand push handrail.

[0011] In an optional embodiment, the linear telescopic assembly includes a sleeve, a slide rod and a mounting head, the sleeve is fixedly connected to the side stop, the slide rod is slidably connected to the sleeve, the mounting head is rotatably connected to the end of the slide rod, and the mounting head is detachably connected to the frame.

[0012] In an optional embodiment, the ergonomic reclining wheelchair further includes a leg support mechanism, which is installed on the front side of the frame.

[0013] In an optional embodiment, the ergonomic reclining wheelchair further includes a front wheel set, a rear wheel set and an anti-dumping support wheel, all of which are connected to the frame, and the rear wheel set is located between the front wheel set and the anti-dumping support wheel.

[0014] The beneficial effects of the embodiments of the present invention include, for example: In summary, the ergonomic reclining wheelchair provided in this embodiment utilizes a first seat cushion and a second seat cushion that cooperate, with the second seat cushion being transmission-connected to the backrest via a linkage mechanism. When the linkage mechanism adjusts the angle of the backrest, for example, when the linkage mechanism drives the backrest to rotate in a first rotational direction (clockwise in the figure), it simultaneously drives the second seat cushion to rotate relative to the first seat cushion in the first rotational direction, thereby increasing the angle between the second seat cushion and the backrest while lowering the second seat cushion relative to the first seat cushion. This creates a recessed area between the second seat cushion and the backrest that accommodates the user's buttocks, increasing the space for the buttocks, reducing pressure on the buttocks muscles from the backrest and the second seat cushion, and improving comfort. Furthermore, when the linkage mechanism drives the backrest to rotate in a second rotational direction (counterclockwise in the figure), i.e., when the backrest switches from a reclining position to a sitting position, the linkage mechanism simultaneously drives the second seat cushion to rotate relative to the first seat cushion in the second rotational direction, thereby decreasing the angle between the second seat cushion and the backrest while simultaneously raising the second seat cushion relative to the first seat cushion. The rising first seat cushion consequently lifts the buttocks, thereby reducing pressure on the buttocks from the backrest and the second seat cushion. In this way, when the user uses the ergonomic reclining wheelchair, by adjusting the angle of the backrest, a larger space can be provided for the buttocks, which can release and relax the buttocks muscles; and in the process of reducing the backrest angle, the buttocks can also be lifted by the second seat cushion to avoid squeezing the buttocks muscles when the angle is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 is an axonometric diagram of the ergonomic reclining wheelchair of this embodiment in a first state; Figure 2 is a side view schematic diagram of the ergonomic reclining wheelchair of this embodiment in a first state; Figure 3 This is a schematic diagram of the ergonomic reclining wheelchair of this embodiment in a first state with the first seat cushion, the second seat cushion and the backrest hidden; Figure 4 is an axonometric diagram of the second state of the ergonomic reclining wheelchair of this embodiment; Figure 5 is a side view schematic diagram of the second state of the ergonomic reclining wheelchair of this embodiment; Figure 6 is a schematic diagram of the frame of the ergonomic reclining wheelchair of this embodiment; Figure 7 is a schematic diagram of the side frame and linkage mechanism of the ergonomic reclining wheelchair of this embodiment; Figure 8 This is a schematic diagram of the cooperation between the push handle and the sliding member of this embodiment.

[0017] icon: 001 - First axis; 002 - Second axis; 003 - Third axis; 004 - Fourth axis; 005 - Fifth axis; 006 - Sixth axis; 007 - Seventh axis; 100 - Frame; 110 - Side frame; 111 - Front upright; 112 - Rear upright; 113 - Mounting block; 114 - Support block; 115 - Top rod; 116 - First rod; 117 - Second rod; 118 - Third rod; 119 - Bottom rod; 120 - Folding connecting rod; 200 - First seat cushion; 300 - Second seat cushion; 400 - Backrest; 500 - linkage mechanism; 510-hand push armrest; 511-push rod; 512-connecting plate; 520-controllable gas spring; 530-support rod; 540-sliding member; 541-mounting seat; 542-pulley; 550-operating handle; 560-brake handle; 600-side armrest; 610-armrest plate; 620-side block; 630-linear telescopic assembly; 631-sleeve; 632-sliding rod; 633-mounting head; 700-leg support mechanism; 800-front wheel group; 900-rear wheel group; 910-anti-dump support wheel. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0021] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0023] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0024] In the prior art, when adjusting the backrest 400 of the wheelchair, the angle between the backrest 400 and the seat cushion changes, which may squeeze the buttocks muscles, easily damaging the buttocks muscles and reducing the user comfort.

[0025] In view of this, the designer provides an ergonomic reclining wheelchair, which can reduce the pressure on the buttocks muscles when the backrest is adjusted to 400 degrees and improve comfort.

[0026] Please refer to Figures 1-8 , this embodiment provides an ergonomic reclining wheelchair, comprising: The vehicle frame 100, the first seat cushion 200, the second seat cushion 300, the backrest 400 and the linkage mechanism 500; the first seat cushion 200 is mounted on the vehicle frame 100, and the first seat cushion 200 and the second seat cushion 300 are connected; the second seat cushion 300 and the backrest 400 are connected via the linkage mechanism 500, and the linkage mechanism 500 is connected to the vehicle frame 100; The linkage mechanism 500 is used to drive the second seat cushion 300 to rotate relative to the first seat cushion 200 in the first rotational direction when driving the backrest 400 to rotate in the first rotational direction, so that the angle between the second seat cushion 300 and the backrest 400 increases and the second seat cushion 300 descends relative to the first seat cushion 200. The linkage mechanism 500 is also used to drive the second seat cushion 300 to rotate relative to the first seat cushion 200 in the second rotational direction when driving the backrest 400 to rotate in the second rotational direction, so that the angle between the second seat cushion 300 and the backrest 400 decreases and the second seat cushion 300 ascends relative to the first seat cushion 200. The first rotation direction is opposite to the second rotation direction.

[0027] As described above, the ergonomic reclining wheelchair provided in this embodiment is used as follows: The backrest 400 is initially in a sitting position, i.e. the angle between the backrest 400 and the second seat cushion 300 is the smallest. When the backrest 400 needs to be adjusted from the initial position to a lying position, i.e. the angle between the backrest 400 and the second seat cushion 300 is increased, a force is applied to the linkage mechanism 500, which drives the backrest 400 to rotate in the first rotation direction ( Figure 7 When the second seat cushion 300 is rotated in the first rotation direction relative to the first seat cushion 200 (clockwise), the second seat cushion 300 can be driven to rotate relative to the first seat cushion 200 in the first rotation direction, so that the angle between the second seat cushion 300 and the backrest 400 increases. At the same time, the second seat cushion 300 also descends relative to the first seat cushion 200, so that a concave portion that can accommodate the user's buttocks is formed between the second seat cushion 300 and the backrest 400, thereby increasing the space for supporting the buttocks, reducing the pressure of the backrest 400 and the second seat cushion 300 on the buttocks muscles, and improving comfort. At the same time, when the backrest 400 is driven in the second rotation direction ( Figure 7 When the backrest 400 is rotated in the counterclockwise direction, that is, when the backrest 400 is switched from a lying state to a sitting state, the linkage mechanism 500 can simultaneously drive the second seat cushion 300 to rotate relative to the first seat cushion 200 along the second rotation direction, so that the angle between the second seat cushion 300 and the backrest 400 is reduced and the second seat cushion 300 is raised relative to the first seat cushion 200. The rising of the first seat cushion 200 can lift the buttocks, thereby reducing the pressure of the backrest 400 and the second seat cushion 300 on the buttocks.

[0028] In this way, when the user uses the ergonomic reclining wheelchair, by adjusting the angle of the backrest 400, a larger space can be provided for the buttocks, and the buttocks muscles can be released and relaxed; and in the process of reducing the angle of the backrest 400, the buttocks can also be lifted by the second seat cushion 300 to avoid squeezing the buttocks muscles when the angle is reduced.

[0029] In this embodiment, unless otherwise specified, Figure 7 , the first rotation direction is clockwise, and the second rotation direction is counterclockwise.

[0030] The following embodiments provide detailed structures of the ergonomic reclining wheelchair of the present application: Please refer to Figures 1-8 The frame 100, the first seat cushion 200, the second seat cushion 300, the backrest 400, two linkage mechanisms 500, two side armrests 600, two leg support mechanisms 700, two front wheel assemblies 800, two rear wheel assemblies 900 and two anti-dumping support wheels 910. The first seat cushion 200 and the second seat cushion 300 are connected and can be an integrated structure. The first seat cushion 200, two linkage mechanisms 500, two side armrests 600, two leg support mechanisms 700, two front wheel assemblies 800, two rear wheel assemblies 900, and two anti-dump support wheels 910 are all mounted on the vehicle frame 100. The two linkage mechanisms 500, two side armrests 600, two leg support mechanisms 700, two front wheel assemblies 800, two rear wheel assemblies 900, and two anti-dump support wheels 910 are distributed on both sides of the width of the vehicle frame 100, with each rear wheel assemblies 900 being located between the corresponding front wheel assemblies 800 and anti-dump support wheels 910. The second seat cushion 300 is connected to the backrest 400 via the two linkage mechanisms 500. When the linkage mechanisms 500 move, the backrest 400 and the second seat cushion 300 can move relative to each other.

[0031] It should be understood that the structures of the two linkage mechanisms 500 can be set to be the same, the structures of the two leg support mechanisms 700 can be set to be the same, the structures of the two front wheel groups 800 can be set to be the same, the structures of the two rear wheel groups 900 can be set to be the same, and the structures of the two anti-dump support wheels 910 can be set to be the same. In this embodiment, in order to avoid repeated descriptions, the structure, connection relationship and movement relationship of a linkage mechanism 500, a leg support mechanism 700, a front wheel group 800, a rear wheel group 900 and an anti-dump support wheel 910 are described in detail as an example.

[0032] Please refer to Figure 1 、 Figure 6 and Figure 7In this embodiment, the vehicle frame 100 optionally includes two side frames 110 and a foldable connecting rod 120 connecting the two side frames 110. The foldable connecting rod 120 can drive the two side frames 110 toward or away from each other, thereby adjusting the shape of the vehicle frame 100. When the two side frames 110 are brought closer together, the volume can be reduced for easier storage. The two side frames 110 have the same structure. The two linkage mechanisms 500 are respectively connected to the two side frames 110, the two side guard rails 600 are respectively connected to the two side frames 110, the two leg support mechanisms 700 are respectively connected to the two side frames 110, the two front wheel assemblies 800 are respectively connected to the two side frames 110, the two rear wheel assemblies 900 are respectively connected to the two side frames 110, and the two anti-dump support wheels 910 are respectively connected to the two side frames 110.

[0033] Optionally, each side frame 110 includes a front upright 111, a rear upright 112, a mounting block 113, a support block 114, a top bar 115, a first bar 116, a second bar 117, a third bar 118, and a bottom bar 119. The ends of the front upright 111 are respectively connected to the first bar 116 and the front wheel assembly 800. The ends of the bottom bar 119 are respectively connected to the front upright 111 and the anti-dump support wheel 910. The ends of the rear upright 112 are respectively connected to the third bar 118 and the bottom bar 119, and the rear wheel assembly 900 can be mounted on the rear upright 112. The mounting block 113 and the support block 114 are mounted on the first bar 116, with the mounting block 113 located on the side of the support block 114 near the front wheel assembly 800. The top bar 115 is fixedly connected to both the mounting block 113 and the support block 114. The first rod 116, the second rod 117, and the third rod 118 are connected in sequence. The first rod 116 and the second rod 117 form an angle, and the second rod 117 and the third rod 118 form an angle. The first rod 116 and the second rod 117 transition smoothly, and the second rod 117 and the third rod 118 transition smoothly. When the wheelchair is in normal use, the frame 100 is supported by the front wheel set 800, the rear wheel set 900, and the anti-dump support wheels 910. The top rod 115 is located above the first rod 116, and the third rod 118 is located below the first rod 116. In this way, there is sufficient space above the third rod 118 for the second seat cushion 300 to descend.

[0034] Optionally, the top rods 115 of the two side frames 110 are connected by two folding connecting rods 120, which has high stability.

[0035] In addition, the first seat cushion 200 is connected to the top rods 115 of the two side frames 110 at the same time.

[0036] In this embodiment, optionally, the first seat cushion 200 and the second seat cushion 300 can be connected as one body, the first seat cushion 200 is fixed by two top rods 115, the second seat cushion 300 is located on the side of the first seat cushion 200 close to the backrest 400, and the second seat cushion 300 can rotate relative to the first seat cushion 200.

[0037] Please refer to Figure 7 and Figure 8 In this embodiment, the linkage mechanism 500 optionally includes a hand-pushing armrest 510, a controllable gas spring 520, a support rod 530, and a sliding member 540. One end of the hand-pushing armrest 510 is connected to the sliding member 540, and the sliding member 540 is slidably connected to the third rod 118 in a predetermined direction, which is consistent with the longitudinal direction of the third rod 118. One end of the controllable gas spring 520 is rotatably connected to the hand-pushing armrest 510, and the other end is rotatably connected to the bottom rod 119. One end of the support rod 530 is rotatably connected to the second rod 117, and the other end of the support rod 530 is rotatably connected to the hand-pushing armrest 510.

[0038] For example, the push handle 510 includes a push rod 511 and two connecting plates 512. The two connecting plates 512 clamp the push rod 511 and are fixedly connected to the push rod 511. One end of the support rod 530 extends between the two connecting plates 512 and is rotatably connected to the two connecting plates 512. The two connecting plates 512 clamp the sliding member 540 and are rotatably connected to the sliding member 540.

[0039] Furthermore, the sliding member 540 includes a mounting base 541 and two pulleys 542. The two pulleys 542 are mounted on the mounting base 541 and spaced apart. The two pulleys 542 cooperate to clamp the third rod 118 and can move along the third rod 118 in a predetermined direction. The pulleys 542 can rotate the third rod 118, thereby reducing friction and making the sliding motion smoother.

[0040] To facilitate description of the relative positional relationships of the various components, it is assumed that both connecting plates 512 are rotatably engaged with the mounting base 541 about a first axis 001, both connecting plates 512 are rotatably engaged with the controllable gas spring 520 about a second axis 002, one end of the support rod 530 is rotatably engaged with the second rod 117 about a third axis 003, and the other end of the support rod 530 is rotatably engaged with the two connecting plates 512 about a fourth axis 004; and the controllable gas spring 520 is rotatably engaged with the bottom rod 119 about a fifth axis 005. The first axis 001, the second axis 002, the third axis 003, the fourth axis 004, and the fifth axis 005 are parallel, with the fourth axis 004 located between the first axis 001 and the second axis 002. The preset direction is perpendicular to the first axis 001.

[0041] It should be understood that the controllable gas spring 520 utilizes existing technology and can be adjusted in length by telescoping. After adjustment, it can maintain the set length, thus supporting the backrest 400 at any angle. In some embodiments, the controllable gas spring 520 may also be referred to as a gas spring rod. For example, a gas spring model C16-08400 manufactured by Suspa can be used, with an operating force range of 160-180 Newtons. The controllable gas spring 520 is equipped with an operating handle 550 mounted on the push handle 510. When the operating handle 550 is pressed, the controllable gas spring 520 can be extended and retracted. Once the controllable gas spring 520 has adjusted its length, releasing the operating handle 550 locks the controllable gas spring 520 at its current length. It should be understood that a single operating handle 550 can simultaneously control both controllable gas springs 520. In this manner, a brake handle 560 for controlling the rear wheels 900 can be mounted on the other push handle 510.

[0042] It is worth noting that the second seat cushion 300 is connected to the two support rods 530 at the same time, and can be adaptively rotated down or up with the adjustment of the angles of the two support rods 530. The backrest 400 is connected to the two push armrests 510 at the same time.

[0043] Please refer to Figure 6-Figure 7 In this embodiment, the side armrest 600 optionally includes an armrest plate 610, a side stop 620, and a linear telescopic assembly 630. The armrest plate 610 is connected to the side stop 620. One side of the side stop 620 is rotatably connected to the push armrest 510 about the sixth axis 006. The other side of the side stop 620 is connected to one end of the linear telescopic assembly 630. The other end of the linear telescopic assembly 630 is rotatably connected to the mounting block 113 about the seventh axis 007. The first axis 001, the sixth axis 006, and the seventh axis 007 are parallel, and the seventh axis 007 is located above the second axis 002. With this design, when the backrest 400 is rotated to adjust its angle, the side armrest 600 can also rotate and adjust its position, making it convenient to use.

[0044] Optionally, the linear telescopic assembly 630 includes a sleeve 631, a slide rod 632, and a mounting head 633. The sleeve 631 is fixedly connected to the side stop 620. The slide rod 632 is inserted into and slidably connected to the sleeve 631. The mounting head 633 is rotatably connected to the end of the slide rod 632 about the seventh axis 007. The mounting head 633 is detachably connected to the mounting block 113. For example, the mounting head 633 can be connected to the mounting block 113 via a ball. When the mounting head 633 and the mounting block 113 are inserted, the ball engages both. To remove the mounting head 633, force is applied to the mounting head 633 to disengage the ball. By separating the mounting head 633 from the mounting block 113, the side armrest 600 can be rotated closer to the backrest 400, facilitating entry and exit from the side of the wheelchair and reducing the overall size of the wheelchair for easier storage.

[0045] In this embodiment, optionally, the leg support mechanism 700 is mounted on the front upright 111 . The height of the leg support mechanism 700 can be adjusted, and the leg support mechanism 700 can also be rotated and folded relative to the frame 100 .

[0046] The operation methods of the ergonomic reclining wheelchair provided in this embodiment include, for example: Please refer to Figure 2 and Figure 5 In the initial state, the backrest 400 is in a vertical position, and the angle between the backrest 400 and the second seat cushion 300 is minimal. When the user needs to lie flat, they press the operating handle 550 of the controllable gas spring 520 and apply downward force to rotate the two push armrests 510 together in the first rotational direction. The backrest 400 rotates in the first rotational direction. At the same time, the controllable gas spring 520 shortens, the slider 540 slides to the left, the linear telescopic assembly 630 lengthens, and the armrest plate 610 and side stopper 620 rotate in the first rotational direction. The rotation of the push armrest 510 drives the support rod 530 to rotate in the first rotational direction, and the angle between the support rod 530 and the backrest 400 increases. The support rod 530 drives the second seat cushion 300 to rotate downward, creating a space between the second seat cushion 300 and the backrest 400 to relax the user's buttocks muscles.

[0047] When the backrest 400 needs to be straightened, the operating handle 550 is pressed to adjust the length of the controllable gas spring 520. Then, force is applied to the two push armrests 510, causing them to rotate together in the second rotation direction. The support rod 530 rotates in the second rotation direction, driving the second seat cushion 300 to rotate and rise. The second seat cushion 300 always supports the buttocks, lifting them from the recessed position and preventing the leg muscles from being squeezed by the backrest 400 and the second seat cushion 300. At the same time, the controllable gas spring 520 lengthens, the slider 540 slides to the right, and the armrest plate 610 and side stopper 620 rotate and return in the second rotation direction.

[0048] The ergonomic reclining wheelchair provided in this embodiment is used when a user sits on the wheelchair. During the process of the backrest 400 tilting backward, the backrest 400 moves backward and the second cushion 300 rotates downward. A groove close to the human buttocks is formed between the second cushion 300 and the backrest 400, providing a sufficiently large space for the buttocks and making the user sit more comfortably. Conversely, when the backrest 400 is raised, the backrest 400 moves forward and the second cushion 300 rotates upward. The backrest 400 and the second cushion 300 cooperate to follow the shape of the buttocks to lift the buttocks and move them upward and forward without squeezing the buttocks.

[0049] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An ergonomic reclining wheelchair, characterized in that: include: A vehicle frame (100), a first seat cushion (200), a second seat cushion (300), a backrest (400), and a linkage mechanism (500); the first seat cushion (200) is mounted on the vehicle frame (100), and the first seat cushion (200) and the second seat cushion (300) are connected; the second seat cushion (300) and the backrest (400) are connected via the linkage mechanism (500), and the linkage mechanism (500) is connected to the vehicle frame (100); The linkage mechanism (500) is used to drive the second seat cushion (300) to rotate relative to the first seat cushion (200) along the first rotation direction when driving the backrest (400) to rotate along the first rotation direction, so that the angle between the second seat cushion (300) and the backrest (400) increases while the second seat cushion (300) descends relative to the first seat cushion (200); the linkage mechanism (500) is also used to drive the second seat cushion (300) to rotate relative to the first seat cushion (200) along the second rotation direction when driving the backrest (400) to rotate along the second rotation direction, so that the angle between the second seat cushion (300) and the backrest (400) decreases while the second seat cushion (300) ascends relative to the first seat cushion (200); The first rotation direction is opposite to the second rotation direction.

2. The ergonomic reclining wheelchair according to claim 1, characterized in that: The linkage mechanism (500) includes a hand-pushing armrest (510), a controllable gas spring (520), a support rod (530) and a sliding member (540); one end of the hand-pushing armrest (510) is rotatably connected to the sliding member (540), and the sliding member (540) is slidably connected to the vehicle frame (100) in a preset direction; one end of the controllable gas spring (520) is rotatably connected to the hand-pushing armrest (510), and the other end is rotatably connected to the vehicle frame (100); one end of the support rod (530) is rotatably connected to the vehicle frame (100), and the other end of the support rod (530) is rotatably connected to the hand-pushing armrest (510); a connection position of the support rod (530) and the hand-pushing armrest (510) is located between a connection position of the controllable gas spring (520) and the hand-pushing armrest (510) and the sliding member (540); The second seat cushion (300) is mounted on the support rod (530); the backrest (400) is mounted on the hand-pushing armrest (510); and the preset direction is perpendicular to the extension direction of the rotation axis of the hand-pushing armrest (510).

3. The ergonomic reclining wheelchair according to claim 2, characterized in that: The sliding member (540) comprises a mounting seat (541) and two pulleys (542), wherein the two pulleys (542) are both mounted on the mounting seat (541) and arranged at intervals; the two pulleys (542) cooperate to clamp the vehicle frame (100), and the two pulleys (542) are both capable of moving on the vehicle frame (100) along the preset direction.

4. The ergonomic reclining wheelchair according to claim 2, characterized in that: The frame (100) includes a first rod (116), a second rod (117) and a third rod (118) connected in sequence, the first rod (116), the second rod (117) and the third rod (118) are all located on the bottom side of the first cushion (200), the first cushion (200) is mounted on the first rod (116), and there is a distance between the second rod (117) and the third rod (118) and the first cushion (200); one end of the support rod (530) is rotatably connected to the second rod (117); the sliding member (540) is slidably connected to the third rod (118) in the length direction of the third rod (118).

5. The ergonomic reclining wheelchair according to claim 2, characterized in that: The hand-pushing handrail (510) includes a push rod (511) and two connecting plates (512), wherein the two connecting plates (512) clamp the push rod (511) and are both fixedly connected to the push rod (511); one end of the support rod (530) extends between the two connecting plates (512) and is rotatably connected to the two connecting plates (512); the two connecting plates (512) clamp the sliding member (540) and are both rotatably connected to the sliding member (540).

6. The ergonomic reclining wheelchair according to any one of claims 2 to 5, characterized in that: The ergonomic reclining wheelchair further includes a side armrest (600), which is transmission-connected to the vehicle frame (100) via the linkage mechanism (500) so as to adaptively rotate when the backrest (400) rotates relative to the vehicle frame (100).

7. The ergonomic reclining wheelchair according to claim 6, characterized in that: The side armrest (600) comprises an armrest plate (610), a side block (620) and a linear telescopic assembly (630); the armrest plate (610) is connected to the side block (620), one side of the side block (620) is rotatably connected to the hand push armrest (510), the other side of the side block (620) is connected to one end of the linear telescopic assembly (630), and the other end of the linear telescopic assembly (630) is rotatably connected to the vehicle frame (100); The connection position between the side stopper (620) and the hand push armrest (510) is located above the connection position between the controllable gas spring (520) and the hand push armrest (510).

8. The ergonomic reclining wheelchair according to claim 7, characterized in that: The linear telescopic assembly (630) includes a sleeve (631), a slide rod (632) and a mounting head (633), wherein the sleeve (631) is fixedly connected to the side stopper (620), the slide rod (632) is slidably connected to the sleeve (631), the mounting head (633) is rotatably connected to the end of the slide rod (632), and the mounting head (633) is detachably connected to the vehicle frame (100).

9. The ergonomic reclining wheelchair according to any one of claims 1 to 5, characterized in that: The ergonomic reclining wheelchair further comprises a leg support mechanism (700), and the leg support mechanism (700) is mounted on the front side of the frame (100).

10. The ergonomic reclining wheelchair according to any one of claims 1 to 5, characterized in that: The ergonomic reclining wheelchair further comprises a front wheel group (800), a rear wheel group (900), and an anti-dumping support wheel (910), all of which are connected to the frame (100); the rear wheel group (900) is located between the front wheel group (800) and the anti-dumping support wheel (910).

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