A wheelchair walker

Abstract

The wheelchair walker provided by the present invention includes a seat frame, a push rod, a front frame, a rear frame, and a seat arranged on the seat frame, the seat frame includes a seat rod, a seat crossbeam, and a reinforcing rod; the bottom of the push rod is connected to the bottom of the seat frame, the upper end of the front frame is connected to the bottom of the seat frame, and the lower end is connected to the front wheel assembly, the upper end of the rear frame is connected to the rear end of the seat rod, and the lower end is connected to the rear wheel assembly; the seat includes a seat plate and a backrest plate connected to the seat plate, by making the seat plate rotatably connected to the seat frame, making the rotation axis of the seat plate perpendicular to the plane where the seat frame is located and passing through the geometric center of the seat plate, making the distance between the rotation axis of the seat plate and the push rod greater than the rotation radius of the seat plate, the wheelchair working state and the walker working state can be conveniently switched by rotating the seat plate relative to the seat frame, the conversion is convenient, the user does not need to move around the wheelchair walker, and the safety is good.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a wheelchair walker. Background Art

[0002] As we all know, wheelchairs and walkers are commonly used medical devices for patients with mobility impairments. The former is used for patients to move around, and the latter is used for patients to exercise for rehabilitation. Therefore, most wheelchairs and walkers on the market are two different types of products. Patients need to prepare both wheelchairs and walkers during the rehabilitation process, which has a great impact on rehabilitation costs.

[0003] To address this problem, medical devices that combine the functions of a wheelchair and a walker have appeared on the market. For example, Chinese patent CN114681222A discloses a wheelchair walker. However, the seat of this solution cannot be rotated, and the backrest is always located behind the seat. The armrests, which serve as a walker, are connected to the rear surface of the backrest. When used as a walker, the backrest easily blocks the user's movement. When resting, the user needs to go around to the front to sit, which makes it easy to fall during the process, and the safety is poor. Some wheelchair walkers also have the armrests located in front of the seat. The conversion between the wheelchair and walker states is achieved by disassembling the armrests, seat and other components. The steps are cumbersome and require both hands to operate, making it difficult for the user to complete the operation alone. The user lacks humanized design and is not convenient for consumers to use. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a wheelchair walker that is easy to convert and has good safety.

[0005] To achieve the above object, the technical solution adopted by the present invention is that the wheelchair walker comprises:

[0006] A seat support, comprising a seat post, a seat crossbeam, and a reinforcing rod, wherein the seat post extends in a front-to-back direction and is spaced apart from each other left and right, the seat crossbeam is connected to a front end of the seat post, and the reinforcing rod is connected to a middle portion of the seat post;

[0007] A push rod extending obliquely from the front lower portion to the rear upper portion, the bottom of the push rod being connected to a push rod cross beam, the push rod cross beam being connected to the bottom of the seat support and being located between the seat cross beam and the reinforcing rod, the top of the push rod being connected to an armrest extending obliquely forward and upward;

[0008] A front bracket, the front bracket extending obliquely from the front lower portion to the rear upper portion, the upper end of the front bracket being connected to a front support beam, the front support beam being connected to the bottom of the seat bracket and being located in front of the push rod beam, and the lower end of the front bracket being connected to a front wheel assembly;

[0009] A rear bracket, the rear bracket extending obliquely from the rear lower portion toward the front upper portion, the upper end of the rear bracket being connected to the rear end of the seat post, and the lower end of the rear bracket being connected to a rear wheel assembly;

[0010] a seat, the seat being arranged on the seat support;

[0011] The seat includes a seat plate extending in the front-to-back direction, and a backrest plate connected to the seat plate. The seat plate is rotatably connected to the seat bracket. The rotation axis of the seat plate is perpendicular to the plane where the seat bracket is located and passes through the geometric center of the seat plate. The distance between the rotation axis of the seat plate and the push rod is greater than the rotation radius of the seat plate. The seat plate switches the wheelchair walker between the wheelchair working state and the walker working state by rotating relative to the seat bracket. The wheelchair walker also includes a seat locking mechanism for locking the relative position of the seat plate and the seat bracket.

[0012] Preferably, the rotation axis of the seat plate also passes through the center of gravity of the wheelchair walker.

[0013] Preferably, the backrest board is rotatably connected to the seat board. When the seat board rotates relative to the seat bracket, the backrest board fits into the seat board through rotation. The seat also includes a backrest board locking mechanism for limiting the relative position of the backrest board and the seat board.

[0014] Preferably, the seat locking mechanism includes a toggle plate and a locking protrusion, one end of the toggle plate is rotatably connected to the lower surface of the seat plate, and the other end extends outward and downward to form a free end, the locking protrusion is connected to the lower surface of the toggle plate and away from the free end, the rotation axis of the toggle plate and the extension direction of the locking protrusion are parallel and perpendicular to the rotation axis of the seat plate, and the toggle plate has a locking working position and an unlocking working position. When the toggle plate is in the locked working position, the free end is away from the seat plate, the locking protrusion is inserted into the plane where the seat bracket is located and presses against the seat cross beam or the reinforcing rod, and the relative position of the seat plate and the seat bracket remains locked. When the toggle plate is in the unlocked working position, the free end is close to the seat plate, the locking protrusion is separated from the plane where the seat bracket is located, and the seat plate and the seat bracket can rotate relative to each other.

[0015] Further preferably, the seat locking mechanism also includes a first elastic member, the two ends of which are respectively pressed against the lower surface of the seat plate and the upper surface of the toggle plate, and the first elastic member has a tendency to drive the toggle plate to change to the locking working position.

[0016] Further preferably, the lower surface of the seat plate and / or the upper surface of the toggle plate is provided with an anti-slip baffle or an anti-slip groove for preventing the elastic member from detaching.

[0017] Further preferably, the seat bracket also includes a cover plate, the rear end of the cover plate is placed on the upper part of the reinforcing rod, the front end of the cover plate is connected to the rear surface of the seat crossbeam, and the cover plate is provided with a locking groove matching the locking protrusion, and the locking groove includes a front locking groove opened at the front end of the cover plate and a rear locking groove opened at the rear end of the cover plate.

[0018] Preferably, the wheelchair walker further comprises an L-shaped seat block, an L-shaped push rod block, an arc-shaped front support block and a straight-line connecting block, the horizontal section of the seat block is connected between the seat cross beam and the reinforcing rod, the vertical section of the seat block is connected to the rear end of the horizontal section and extends downward, the middle part of the vertical section of the push rod block is connected to the push rod cross beam, the horizontal section of the push rod block extends forward, the middle part of the front support block is connected to the front support cross beam, the opening of the front support block faces downward and rearward, and the connecting block extends in the front-to-back direction.

[0019] Further preferably, the middle part of the horizontal section of the seat block is rotatably connected to the rear end of the front support block via a first rotating shaft, the lower end of the front support block is rotatably connected to the front end of the connecting block via a second rotating shaft, the rear end of the connecting block is rotatably connected to the front end of the horizontal section of the push rod block via a third rotating shaft, and the middle part of the push rod block is rotatably connected to the lower end of the vertical section of the seat block via a fourth rotating shaft, so that the seat block, the push rod block, the front support block and the connecting block form a four-bar linkage, which can drive the wheelchair walker to switch between an unfolded state and a folded state when the four-bar linkage moves.

[0020] Further preferably, the wheelchair walker also includes a frame locking mechanism for locking the four-bar linkage, the frame locking mechanism includes a locking pin and a locking slot, the locking pin and the locking slot are respectively arranged on two adjacent components of the four-bar linkage, when the frame locking mechanism is locked, the locking pin is inserted into the locking slot, the relative positions of the components in the four-bar linkage remain locked, and the wheelchair walker remains in the expanded state.

[0021] Further preferably, the locking groove is opened on the upper end surface of the vertical section of the push rod block, the locking groove passes through the two side surfaces of the vertical section of the push rod block and extends downward, the rear end portion of the horizontal section of the seat block is provided with a waist-shaped groove extending in the up and down directions, the locking pin is vertically inserted into the waist-shaped groove and can be moved up and down, and when the locking pin moves downward to the extreme position, the locking pin is inserted into the locking groove.

[0022] Further preferably, the frame locking mechanism also includes a driving unit for driving the locking pin to move up and down, the driving unit including an unlocking block movably arranged between the seat crossbeam and the reinforcing rod, and an unlocking groove arranged at the rear end of the unlocking block for passing the locking pin, the unlocking groove extending obliquely from the rear lower part to the front upper part, when the unlocking block moves forward to the extreme position, the bottom of the unlocking groove is aligned with the bottom of the waist-shaped groove and the bottom of the locking groove, and when the unlocking block moves backward to the extreme position, the top of the unlocking groove is aligned with the top of the waist-shaped groove and is located above the locking groove.

[0023] Further preferably, the unlocking block is further provided with a horizontal groove for passing the first rotating shaft, the horizontal groove is located in front of the unlocking groove, and the groove length of the horizontal groove is equal to the distance the unlocking block moves forward and backward.

[0024] Further preferably, the front end portion of the unlocking block is connected to a guide rod portion extending forward, the front end of the guide rod portion passes through the seat cross beam to form an unlocking button protruding outward, and the rear end portion of the guide rod portion is provided with a card slot extending along the front and rear directions, the card slot is connected to the horizontal slot, and a second elastic member is provided in the card slot, and the front and rear ends of the second elastic member respectively press against the front side wall of the card slot and the outer circumferential surface of the first rotating shaft, and the second elastic member has a tendency to drive the unlocking block to move forward to the extreme position.

[0025] Further preferably, the push rod block is provided with guide slopes extending obliquely downward on both sides of the lock slot, so that the lock pin can be guided into the lock slot through the guide slopes when the wheelchair walker is changed from a folded state to an unfolded state.

[0026] Further preferably, the seat block, the push rod block and the front support block each have two blocks and are spaced apart in the front-to-back direction, the seat block is located on the outside of the push rod block and the front support block, and the connecting block is located on the inside of the push rod block and the front support block.

[0027] Further preferably, the waist-shaped groove passes through the two side surfaces of the horizontal section of the seat block, the unlocking groove and the horizontal groove pass through the two side surfaces of the unlocking block, the locking pin passes through the unlocking block and the horizontal sections of the seat block on both sides, the first rotating shaft passes through the unlocking block, and the two ends of the first rotating shaft are connected to the horizontal sections of the seat block on both sides.

[0028] Further preferably, the wheelchair walker also includes a footrest assembly, which includes a footrest bracket rotatably connected to the inner side of the front bracket, and a foot pedal arranged on the footrest bracket, and the footrest assembly has a folded working position and an unfolded working position. When the footrest assembly is in the folded working position, the footrest assembly, the front bracket and the front support beam are located in the same plane. When the footrest assembly is in the unfolded working position, the footrest assembly is unfolded flatly and located in front and above the front wheel assembly.

[0029] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0030] 1. The wheelchair walker can be easily switched between the wheelchair working state and the walker working state by rotating the seat plate relative to the seat bracket, and the conversion is convenient.

[0031] 2. When used as a walker, the backrest can be rotated to the front of the seat plate. The backrest will not block the user's movement. When a rest is needed, the user only needs to turn around to sit, without having to move around the wheelchair walker, which is safer.

[0032] 3. When used as a walker, it allows the user to be as close to the center of gravity of the wheelchair walker as possible, avoiding the front of the wheelchair walker from tilting up, which is safer.

[0033] 4. When used as a wheelchair, it is no different from a normal wheelchair, and the user has good stability and a high-end feeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a three-dimensional schematic diagram of a preferred embodiment of the present invention in a wheelchair working state.

[0035] Figure 2 It is a three-dimensional schematic diagram of a preferred embodiment of the present invention in a walking aid working state.

[0036] Figure 3 yes Figure 1 Schematic diagram of the left side.

[0037] Figure 4 、 Figure 5 yes Figure 2 The left view of Figure 4 The footrest assembly is in the folded working position. Figure 5 The footrest assembly is in the extended working position. Figure 5 A partial section was also performed.

[0038] Figure 6 yes Figure 3 The three-dimensional assembly exploded view hides the seat, seat locking mechanism and cover.

[0039] Figure 7 yes Figure 5 Schematic diagram with the seat and seat locking mechanism hidden.

[0040] Figure 8 yes Figure 4 The left side view of the vehicle when it is transformed into the folded state hides the seat and the seat locking mechanism.

[0041] Figure 9 yes Figure 7 A local enlarged schematic diagram of point A in the middle.

[0042] Figure 10 yes Figure 5 A partial enlarged schematic diagram of the middle seat and seat locking mechanism.

[0043] Wherein: 10. Seat bracket; 11. Seat rod; 12. Seat crossbeam; 13. Reinforcement rod; 14. Cover plate; 141. Front locking slot; 142. Rear locking slot; 20. Push rod; 21. Push rod crossbeam; 22. Armrest; 30. Front bracket; 31. Front support crossbeam; 32. Front wheel assembly; 40. Rear bracket; 41. Rear wheel assembly; 50. Seat; 51. Seat board; 511. Anti-slip baffle; 52. Backrest board; 61. Toggle plate; 611. Free end; 612. Anti-slip slot; 62. Locking protrusion; 63. First elastic member; 71. Seat block; 711. Horizontal section. 712. Vertical section; 713. Waist-shaped groove; 72. Push rod block; 721. Vertical section; 722. Horizontal section; 723. Guide slope; 73. Front support block; 74. Connecting block; 75. First rotating axis; 76. Second rotating axis; 77. Third rotating axis; 78. Fourth rotating axis; 79. Four-bar linkage; 81. Lock pin; 82. Lock slot; 831. Unlocking block; 832. Unlocking slot; 833. Horizontal slot; 834. Guide rod; 835. Unlocking button; 836. Slot; 837. Second elastic member; 90. Pedal assembly; 91. Pedal bracket; 92. Pedal. DETAILED DESCRIPTION

[0044] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0045] The front-back direction, the up-down direction and the left-right direction described in the present invention Figure 3 The left and right, up and down, inside and outside directions.

[0046] like Figures 1 to 10As shown, the wheelchair walker provided by the present invention includes: a seat bracket 10, a push rod 20, a front bracket 30, a rear bracket 40, and a seat 50, wherein the seat bracket 10 includes a seat rod 11, a seat crossbeam 12, and a reinforcing rod 13. The seat rod 11 extends in the front-to-back direction and is spaced apart from each other on the left and right sides. The seat crossbeam 12 and the reinforcing rod 13 extend in the left-to-right direction. The seat crossbeam 12 is connected to the front end of the seat rod 11, and the reinforcing rod 13 is connected to the middle of the seat rod 11. The push rod 20 extends obliquely from the front lower portion to the rear upper portion and is spaced apart from each other on the left and right sides. The bottom of the push rod 20 is connected to a push rod 13. The crossbeam 21 and the push rod crossbeam 21 are connected to the bottom of the seat bracket 10 and are located between the seat crossbeam 12 and the reinforcing rod 13. The top of the push rod 20 is connected to the armrest 22 extending forward and upward; the front bracket 30 extends from the front lower to the rear upper and is arranged at intervals on the left and right. The upper end of the front bracket 30 is connected to the front support crossbeam 31, which extends in the left and right directions. The front support crossbeam 31 is connected to the bottom of the seat bracket 10 and is located in front of the push rod crossbeam 21. The lower end of the front bracket 30 is connected to the front wheel assembly 32; the rear bracket 40 is tilted from the rear lower to the front upper The upper end of the rear bracket 40 is connected to the rear end of the seat rod 11. Furthermore, the rear bracket 40, the seat rod 11, and the seat cross beam 12 are integrally bent and formed. The lower end of the rear bracket 40 is connected to the rear wheel assembly 41. The seat 50 is provided on the seat bracket 10. The seat 50 includes a seat plate 51 extending in the front-to-back direction, and a backrest plate 52 connected to the seat plate 51. The seat plate 51 is rotatably connected to the seat bracket 10. The rotation axis of the seat plate 51 is perpendicular to the plane where the seat bracket 10 is located and passes through the geometric center of the seat plate 51. The distance between the rotation axis of 51 and the push rod 20 is greater than the rotation radius of the seat plate 51 by 3-5 cm. The seat plate 51 switches the wheelchair walker between the wheelchair working state and the walker working state by rotating relative to the seat bracket 10. When the wheelchair walker is in the wheelchair working state, the backrest plate 52 is located directly behind the seat plate 51. When the wheelchair walker is in the walker working state, the backrest plate 52 is located directly in front of the seat plate 51. The wheelchair walker also includes a seat locking mechanism for locking the relative positions of the seat plate 51 and the seat bracket 10.

[0047] The benefits of this setting are:

[0048] 1. The wheelchair walker can be easily switched between the wheelchair working state and the walker working state by rotating the seat plate relative to the seat bracket, and the conversion is convenient.

[0049] 2. When used as a walker, the backrest can be rotated to the front of the seat plate. The backrest will not block the user's movement. When a rest is needed, the user only needs to turn around to sit, without having to move around the wheelchair walker, which is safer.

[0050] 3. When used as a walker, it allows the user to be as close to the center of gravity of the wheelchair walker as possible, avoiding the front of the wheelchair walker from tilting up, which is safer.

[0051] 4. When used as a wheelchair, it is no different from a normal wheelchair, and the user has good stability and a high-end feeling.

[0052] To further enhance stability and safety during use, in this embodiment, the rotation axis of the seat plate 51 also passes through the center of gravity of the wheelchair walker.

[0053] To facilitate the rotation of the seat plate 51 relative to the seat bracket 10 and avoid interference between the backrest plate 52 and the push rod 20 during rotation, in this embodiment, the backrest plate 52 is rotatably connected to the seat plate, and the rotation axis of the backrest plate 52 is parallel to the horizontal plane and perpendicular to the rotation axis of the seat plate 51. When the seat plate 51 rotates relative to the seat bracket 10, the backrest plate 52 rotates and fits with the seat plate 51 so that its edge is located inside the seat plate 51, avoiding interference with the push rod 20. The seat 50 also includes a backrest plate locking mechanism for limiting the relative position of the backrest plate 52 and the seat plate.

[0054] When the toggle plate 61 is in the locked position, the free end 611 is away from the seat plate 51, the locking protrusion 62 is inserted into the plane where the seat bracket 10 is located and presses against the seat crossbeam 12 or the reinforcing rod 13, and the seat plate 51 and the seat bracket are locked. The relative position of 10 remains locked. When the toggle plate 61 is in the unlocked working position, the free end 611 is close to the seat plate 51, and the locking protrusion 62 is separated from the plane where the seat bracket 10 is located, and the seat plate 51 and the seat bracket 10 can rotate relative to each other; further, the seat locking mechanism also includes a first elastic member 63, which is a compression spring. The two ends of the first elastic member 63 are respectively pressed against the lower surface of the seat plate 51 and the upper surface of the toggle plate 61, and the first elastic member 63 has a tendency to drive the toggle plate 61 to change to the locked working position; at the same time, the seat bracket 10 also includes a cover plate 14, the rear end of the cover plate 14 is placed on the upper part of the reinforcing rod 13, the front end of the cover plate 14 is connected to the rear surface of the seat cross beam 12, and a locking groove matching the locking protrusion 62 is provided on the cover plate 14, and the locking groove includes a front locking groove 141 provided at the front end of the cover plate 14 and a rear locking groove 142 provided at the rear end of the cover plate 14.

[0055] The advantage of this arrangement is that when rotating the seat plate 51, you only need to pull the free end 611 upward with one hand to disengage the locking protrusion 62 from the front locking groove 141 / rear locking groove 142, and then you can drive the seat plate 51 to rotate by swinging the free end 611. When the seat plate 51 is rotated to a certain angle (greater than or equal to 15 degrees), due to the obstruction of the cover plate 14, the locking protrusion 62 will not be able to be pressed into the plane where the seat bracket 10 is located. At this time, you can continue to rotate the seat plate 51 to the opposite side by rotating it with one hand. When it is rotated into place, the locking protrusion 62 will automatically be pressed into the rear locking groove 142 / front locking groove 141 under the action of the first elastic member 63 to complete the locking.

[0056] In order to prevent the first elastic member 63 from detaching, the lower surface of the seat plate 51 is further provided with an anti-detachment baffle 511, which is annular and covers the upper end of the first elastic member 63, and the upper surface of the toggle plate 61 is provided with an anti-detachment groove 612, which is used to accommodate the lower end of the first elastic member 63.

[0057] In order to facilitate storage and reduce occupied space, the wheelchair walker also has a folding function. Specifically, the wheelchair walker also includes an L-shaped seat block 71, an L-shaped push rod block 72, an arc-shaped front support block 73 and a straight-line connecting block 74. The above shapes are the projection shapes of each component in the left and right directions. The seat block 71 has a horizontal section 711 and a vertical section 712. The horizontal section 711 of the seat block 71 is welded between the seat cross beam 12 and the reinforcing rod 13. The vertical section 712 of the seat block 71 is connected to the rear end of the horizontal section 711 and extends downward. The push rod block 72 has a vertical section 721 and a horizontal section 722. The middle part of the vertical section 721 of the push rod block 72 is connected to the push rod cross beam 21 (welded and fixed after clamping). The horizontal section of the push rod block 72 extends forward. The middle part of the front support block 73 is connected to the front support The cross beam 31 is connected (welded and fixed after clamping), the opening of the front support block 73 faces downward and rearward, and the connecting block 74 extends in the front and rear directions; the middle part of the horizontal section 711 of the seat block 71 is rotatably connected to the rear end of the front support block 73 by a first rotating shaft 75, the lower end of the front support block 73 is rotatably connected to the front end of the connecting block 74 by a second rotating shaft 76, the rear end of the connecting block 74 is rotatably connected to the front end of the horizontal section 722 of the push rod block 72 by a third rotating shaft 77, and the middle part of the push rod block 72 is rotatably connected to the lower end of the vertical section 712 of the seat block 71 by a fourth rotating shaft 78, so that the seat block 71, the push rod block 72, the front support block 73 and the connecting block 74 form a four-bar linkage 79. When the four-bar linkage 79 moves, it can drive the wheelchair walker to transform between the unfolded state and the folded state.

[0058] In order to ensure the stability of the wheelchair walker in the unfolded state, the wheelchair walker further includes a frame locking mechanism for locking the four-bar linkage 79. The frame locking mechanism includes a locking pin 81 and a locking slot 82. The locking pin 81 and the locking slot 82 are respectively arranged on two adjacent components of the four-bar linkage 79. When the frame locking mechanism is locked, the locking pin 81 is inserted into the locking slot 82, and the relative positions of the components in the four-bar linkage 79 remain locked, and the wheelchair walker remains in the unfolded state. When the frame locking mechanism is unlocked, the locking pin 81 disengages from the locking slot 82, and the components in the four-bar linkage 79 can rotate relative to each other, so that the wheelchair walker is transformed into the folded state.

[0059] Specifically, the locking groove 82 is opened on the upper end surface of the vertical section 721 of the push rod block 72. The locking groove 82 passes through the two side surfaces of the vertical section 721 of the push rod block 72 and extends downward. The rear end portion of the horizontal section 711 of the seat block 71 is provided with a waist-shaped groove 713 extending in the up and down directions. The locking pin 81 is vertically inserted into the waist-shaped groove 713 and can be moved up and down. When the locking pin 81 moves downward to the extreme position, the locking pin 81 is inserted into the locking groove 82.

[0060] To further enhance the stability of the wheelchair walker in the unfolded state, when the locking pin 81 is inserted into the locking slot 82 , the axis of the second rotation axis 76 , the axis of the third rotation axis 77 and the axis of the fourth rotation axis 78 are located in the same plane.

[0061] In order to facilitate unlocking and enhance the high-end feel of the wheelchair walker, in this embodiment, the frame locking mechanism also includes a driving unit for driving the locking pin 81 to move up and down, the driving unit including an unlocking block 831 movably arranged between the seat cross beam 12 and the reinforcing rod 13, and an unlocking groove 832 arranged at the rear end of the unlocking block 831 for passing the locking pin 81, the unlocking groove 832 extends obliquely from the rear lower part to the front upper part (the inclination angle is 45 degrees), when the unlocking block 831 moves forward to the extreme position, the bottom of the unlocking groove 832 is aligned with the bottom of the waist-shaped groove 713 and the bottom of the locking groove 82, when the unlocking block 831 moves backward to the extreme position, the top of the unlocking groove 832 is aligned with the top of the waist-shaped groove 713 and is located above the locking groove 82, therefore, when the unlocking block 831 moves forward and backward, the locking pin 81 can be driven to move up and down in the waist-shaped groove 713 through the unlocking groove 832.

[0062] The first rotation axis 75 is a kind of rotation axis 75 of the embodiment of the present invention, and the first rotation axis 75 is a kind of rotation axis 75 of the embodiment of the present invention, which is a kind of rotation axis 75 of the present invention.

[0063] To facilitate resetting, in this embodiment, a slot 836 extending along the front-to-back direction is provided at the rear end of the guide rod portion 834, and the slot 836 is connected to the horizontal slot 833. A second elastic member 837 is provided in the slot 836, and the second elastic member 837 is also a compression spring. The front and rear ends of the second elastic member 837 respectively press against the front side wall of the slot 836 and the outer circumferential surface of the first rotating shaft 75, and the second elastic member 837 has a tendency to drive the unlocking block 831 to move forward to the extreme position. That is to say, the first rotating shaft 75 also has the function of supporting the second elastic member 837.

[0064] Furthermore, the parts of the push rod block 72 located on both sides of the lock slot 82 are provided with guide slopes 723 extending obliquely downward. When the wheelchair walker is changed from the folded state to the unfolded state, the lock pin 81 can be guided into the lock slot 82 through the guide slopes 723. That is, when the four-bar linkage 79 is rotated into place, the lock pin 81 can be automatically guided into the lock slot 82, achieving the technical effect of automatic locking.

[0065] In order to make the structure of the four-bar linkage 79 more compact and improve the strength of the four-bar linkage 79, in this embodiment, the seat block 71, the push rod block 72, and the front support block 73 each have two blocks and are spaced apart in the front-to-back direction. The seat block 71 is located on the outside of the push rod block 72 and the front support block 73, and the connecting block 74 is located on the inside of the push rod block 72 and the front support block 73. Furthermore, the waist-shaped groove 713 passes through the two side surfaces of the horizontal section 711 of the seat block 71, the unlocking groove 832 and the horizontal groove 833 pass through the two side surfaces of the unlocking block 831, the locking pin 81 passes through the unlocking block 831 and the horizontal sections 711 of the seat blocks 71 on both sides, the first rotating shaft 75 passes through the unlocking block 831, and the two ends of the first rotating shaft 75 are connected to the horizontal sections 711 of the seat blocks 71 on both sides.

[0066] To facilitate stepping while riding, in this embodiment, the wheelchair walker further includes a footrest assembly 90, which includes a footrest bracket 91 rotatably connected to the inner side of the front bracket 30, and a footrest 92 provided on the footrest bracket 91. The footrest assembly 90 has a folded working position and an unfolded working position. When the footrest assembly 90 is in the folded working position, the footrest assembly 90 is located in the same plane as the front bracket 30 and the front supporting crossbeam 31. When the footrest assembly 90 is in the unfolded working position, the footrest assembly 90 is unfolded flatly and located in front and above the front wheel assembly 32.

[0067] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wheelchair walker, comprising: A seat support comprising a seat post, a seat crossbeam, and a reinforcing rod, wherein the seat post extends in a front-to-rear direction and is spaced apart from each other, the seat crossbeam is connected to the front end of the seat post, and the reinforcing rod is connected to the middle of the seat post; A push rod extending obliquely from the front lower portion to the rear upper portion, the bottom of which is connected to a push rod crossbeam connected to the bottom of the seat bracket and located between the seat crossbeam and the reinforcing rod, and the top of which is connected to an armrest extending obliquely forward and upward; A front bracket extending obliquely from the front lower portion to the rear upper portion, the upper end of which is connected to a front support beam connected to the bottom of the seat bracket and located in front of the push rod beam, and the lower end of which is connected to the front wheel assembly; A rear bracket extending obliquely from the rear lower portion to the front upper portion, with an upper end portion connected to the rear end portion of the seat post and a lower end portion connected to the rear wheel assembly; a seat disposed on a seat support; Its characteristics are: The seat includes a seat plate extending in a front-to-rear direction and rotatably connected to a seat frame, and a backrest plate connected to the seat plate. The rotation axis of the seat plate is perpendicular to the plane on which the seat frame is located and passes through the geometric center of the seat plate. The distance between the rotation axis and the push rod is greater than the rotation radius of the seat plate. The seat plate rotates relative to the seat frame to switch the wheelchair walker between a wheelchair operating state and a walker operating state. The wheelchair walker also includes a seat locking mechanism for locking the relative position of the seat plate and the seat bracket, which includes a toggle plate with one end rotatably connected to the lower surface of the seat plate and the other end extending outward and downward to form a free end, and a locking protrusion connected to the lower surface of the toggle plate and away from the free end, the rotation axis of the toggle plate and the extension direction of the locking protrusion are parallel and perpendicular to the rotation axis of the seat plate; the toggle plate has a locking working position and an unlocking working position, when it is in the locking working position, the free end is away from the seat plate, the locking protrusion is inserted into the plane where the seat bracket is located and presses against the seat crossbeam or reinforcing rod, so that the relative position of the seat plate and the seat bracket remains locked, and when it is in the unlocking working position, the free end is close to the seat plate, the locking protrusion is separated from the plane where the seat bracket is located, so that the seat plate and the seat bracket can rotate relative to each other.

2. The wheelchair walker according to claim 1, characterized in that: The rotation axis of the seat plate also passes through the center of gravity of the wheelchair walker.

3. The wheelchair walker according to claim 1, characterized in that: The backrest board is rotatably connected to the seat board. When the seat board rotates relative to the seat bracket, the backrest board fits into the seat board through rotation. The seat also includes a backrest board locking mechanism for limiting the relative position of the backrest board and the seat board.

4. The wheelchair walker according to claim 1, characterized in that: The seat locking mechanism also includes a first elastic member, the two ends of which are respectively pressed against the lower surface of the seat plate and the upper surface of the toggle plate, and the first elastic member has a tendency to drive the toggle plate to change to the locking working position.

5. The wheelchair walker according to claim 4, characterized in that: The lower surface of the seat plate and / or the upper surface of the toggle plate are provided with an anti-slip baffle or an anti-slip groove for preventing the elastic member from escaping.

6. The wheelchair walker according to claim 1, characterized in that: The seat bracket also includes a cover plate, which is placed on the upper part of the reinforcing rod. The front end of the cover plate is connected to the rear surface of the seat crossbeam. The cover plate is provided with a locking groove that matches the locking protrusion. The locking groove includes a front locking groove opened at the front end of the cover plate and a rear locking groove opened at the rear end of the cover plate.

7. The wheelchair walker according to claim 1, characterized in that: The wheelchair walker also includes an L-shaped seat block, an L-shaped push rod block, an arc-shaped front support block and a straight-line connecting block. The horizontal section of the seat block is connected between the seat crossbeam and the reinforcing rod, the vertical section of the seat block is connected to the rear end of the horizontal section and extends downward, the middle part of the vertical section of the push rod block is connected to the push rod crossbeam, the horizontal section of the push rod block extends forward, the middle part of the front support block is connected to the front support crossbeam, the opening of the front support block faces downward and rearward, and the connecting block extends in the front-to-back direction.

8. The wheelchair walker according to claim 7, characterized in that: The middle part of the horizontal section of the seat block is rotatably connected to the rear end of the front support block via a first rotating shaft, the lower end of the front support block is rotatably connected to the front end of the connecting block via a second rotating shaft, the rear end of the connecting block is rotatably connected to the front end of the horizontal section of the push rod block via a third rotating shaft, and the middle part of the push rod block is rotatably connected to the lower end of the vertical section of the seat block via a fourth rotating shaft, so that the seat block, the push rod block, the front support block and the connecting block form a four-bar linkage, which can drive the wheelchair walker to transform between an unfolded state and a folded state when the four-bar linkage moves.

9. The wheelchair walker according to claim 8, characterized in that: The wheelchair walker also includes a frame locking mechanism for locking the four-bar linkage. The frame locking mechanism includes a locking pin and a locking slot. The locking pin and the locking slot are respectively arranged on two adjacent components of the four-bar linkage. When the frame locking mechanism is locked, the locking pin is inserted into the locking slot, the relative positions of the components in the four-bar linkage remain locked, and the wheelchair walker remains in the deployed state.

10. The wheelchair walker according to claim 9, characterized in that: The locking groove is opened on the upper end surface of the vertical section of the push rod block, and the locking groove passes through the two side surfaces of the vertical section of the push rod block and extends downward. The rear end of the horizontal section of the seat block is provided with a waist-shaped groove extending in the up and down directions. The locking pin is vertically inserted into the waist-shaped groove and can be moved up and down. When the locking pin moves downward to the extreme position, the locking pin is inserted into the locking groove.

11. The wheelchair walker according to claim 10, characterized in that: The frame locking mechanism also includes a driving unit for driving the locking pin to move up and down, and the driving unit includes an unlocking block movably arranged between the seat crossbeam and the reinforcing rod, and an unlocking groove arranged at the rear end of the unlocking block for passing the locking pin, the unlocking groove extending obliquely from the rear lower part to the front upper part, when the unlocking block moves forward to the extreme position, the bottom of the unlocking groove is aligned with the bottom of the waist-shaped groove and the bottom of the locking groove, and when the unlocking block moves backward to the extreme position, the top of the unlocking groove is aligned with the top of the waist-shaped groove and is located above the locking groove.

12. The wheelchair walker according to claim 11, characterized in that: The unlocking block is further provided with a horizontal groove for passing the first rotating shaft. The horizontal groove is located in front of the unlocking groove. The length of the horizontal groove is equal to the distance the unlocking block moves forward and backward.

13. The wheelchair walker according to claim 12, characterized in that: The front end portion of the unlocking block is connected to a guide rod portion extending forward, the front end of the guide rod portion passes through the seat cross beam to form an unlocking button protruding outward, the rear end portion of the guide rod portion is provided with a card slot extending along the front-to-back direction, the card slot is connected to the horizontal slot, and a second elastic member is provided in the card slot, the front and rear ends of the second elastic member respectively press against the front side wall of the card slot and the outer circumferential surface of the first rotating shaft, and the second elastic member has a tendency to drive the unlocking block to move forward to the extreme position.

14. The wheelchair walker according to claim 13, characterized in that: The push rod block is provided with guide slopes extending obliquely downward on both sides of the lock slot. When the wheelchair walker is transformed from a folded state to an unfolded state, the lock pin can be guided into the lock slot through the guide slopes.

15. The wheelchair walker according to claim 13, characterized in that: The seat block, the push rod block and the front support block each have two blocks and are spaced apart in the front-to-back direction. The seat block is located outside the push rod block and the front support block, and the connecting block is located inside the push rod block and the front support block.

16. The wheelchair walker according to claim 15, characterized in that: The waist-shaped groove passes through the two side surfaces of the horizontal section of the seat block, the unlocking groove and the horizontal groove pass through the two side surfaces of the unlocking block, the locking pin passes through the unlocking block and the horizontal sections of the seat block on both sides, the first rotating shaft passes through the unlocking block, and the two ends of the first rotating shaft are connected to the horizontal sections of the seat block on both sides.

17. The wheelchair walker according to any one of claims 1 to 16, characterized in that: The wheelchair walker also includes a footrest assembly, which includes a footrest bracket rotatably connected to the inner side of the front bracket, and a foot pedal arranged on the footrest bracket. The footrest assembly has a folded working position and an unfolded working position. When the footrest assembly is in the folded working position, the footrest assembly, the front bracket and the front crossbeam are located in the same plane. When the footrest assembly is in the unfolded working position, the footrest assembly is unfolded flatly and located in front and above the front wheel assembly.

Images