Supporting frame on wheelchair

Abstract

The utility model relates to the technical field of wheelchairs, which comprises a connecting seat, a supporting rod, a supporting part and a first locking part, a clamping part is arranged on the connecting seat, the supporting rod is rotatably and adjustably connected to the connecting seat, the first locking part is used for locking the rotation adjusting angle of the supporting rod, the supporting part is connected to the supporting rod, and the supporting part is used for supporting the lower limbs of a user. The clamping part is used for installing the connecting seat on a finished wheelchair, the supporting part is located on the front side of the finished wheelchair, the supporting frame is detachably installed on the wheelchair, when a user sits on the wheelchair, the supporting frame can be adjusted according to the needs of the user so that the injured part can be lifted, the blood circulation speed of the injured part can be increased, and vein blood backflow of the injured part can be promoted; and the recovery can be better carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelchairs, in particular to a supporting frame on a wheelchair. Background Art

[0002] Wheelchairs are a means of transportation for people with physical disabilities and limited mobility, allowing them to exercise and participate in social activities. Lower limb injuries often require elevation, as local soft tissue damage can affect blood circulation in the distal limb, exacerbating swelling and causing significant pain. If the swelling subsides too slowly, it can lead to venous thrombosis in the lower limb. Therefore, elevation is necessary to improve blood circulation, promote venous return in the distal limb, and aid recovery.

[0003] However, in the wheelchairs currently in use, the pedal brackets are usually fixed to the wheelchair frame. For example, the Chinese invention patent with application publication number CN103800146A discloses a wheelchair movable leg, which is installed on the wheelchair frame through a leg support tube and a leg support support tube. When people with lower limb injuries sit in the wheelchair, the patent cannot provide support when raising the injured lower limb. If the injured lower limb is placed on the wheelchair movable leg for a long time, it will cause discomfort to the injured part and even induce venous thrombosis, bringing inconvenience to the user. Utility Model Content

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a support frame for a wheelchair, which solves the technical problem that the wheelchair cannot provide support for lifting the injured lower limb when the user sits on the wheelchair.

[0005] In order to achieve the above purpose, the present invention is implemented through the following technical solutions:

[0006] A support frame for a wheelchair, used to be installed on a finished wheelchair, includes: a connecting seat, a support rod, a supporting portion, and a first locking component. The connecting seat is provided with a clamping portion. The support rod is rotatably and adjustably connected to the connecting seat. The first locking component is used to lock the rotation adjustment angle of the support rod. The supporting portion is connected to the support rod and is used to support the user's lower limbs. When in use, the clamping portion is used to install the connecting seat on the finished wheelchair. The supporting portion is located on the front side of the finished wheelchair.

[0007] Based on the above structure, the principle of the support frame on the wheelchair is: the connecting seat is detachably installed on the finished wheelchair through the clamping part, which is convenient for the user to modify the finished wheelchair without replacing the entire wheelchair. The first locking component is used to lock the rotation adjustment angle of the support rod. The user can freely adjust the rotation angle of the support rod according to the requirement of raising the lower limbs, and use the first locking component to lock the support rod. The support part is used to support the user's lower limbs.

[0008] Furthermore, in a support frame for a wheelchair in the present application, the support rod includes: a fixed rod, a telescopic rod, and a second locking component. The telescopic rod is movably connected to the fixed rod, and the telescopic rod can be telescopically adjusted along the extension direction of the fixed rod. The second locking component is used to lock the position of the telescopic rod on the fixed rod, and the support portion is connected to the telescopic rod. As a preferred embodiment of the present application, the telescopic rod in the support frame for a wheelchair in the present application can be telescopically adjusted along the extension direction of the fixed rod. The user limits the telescopic rod through the second locking component, so that the telescopic rod is locked at different positions on the fixed rod to accommodate the needs of users with different leg lengths.

[0009] Furthermore, in a support frame on a wheelchair in the present application, the first locking component is a threaded locking component, the first locking component is arranged at the rotational connection between the connecting seat and the support rod, and the first locking component axially connects the connecting seat and the support rod; when the first locking component locks the connecting seat and the support rod, the first locking component axially locks the connecting seat and the support rod, so that the connecting seat and the support rod are axially tightly fitted. As a preferred embodiment of the present application, the first locking component in a support frame on a wheelchair in the present application limits the support rod, so that the support rod is in a limited or rotatable adjustment state. When the user needs to adjust the support rod, the first locking component is released to separate the connecting seat and the support rod. After adjusting the support rod to a suitable angle, the first locking component is locked. When the connecting seat and the support rod are tightly fitted, the limiting of the support rod is completed.

[0010] Furthermore, in a wheelchair support frame according to the present application, the first locking component comprises a screw, a nut being threadedly connected to the front end of the screw, the screw passing through a connecting seat and a support rod, and the connecting seat and support rod being arranged between the screw head and the nut. As a preferred embodiment of the present application, the first locking component in the wheelchair support frame according to the present application uses the screw and nut to axially lock the connecting seat and support rod, limiting the position of the support rod. At the same time, the screw also serves as the axis of rotation for the support rod to rotate around the connecting seat.

[0011] Furthermore, in a support frame for a wheelchair in the present application, a group of teeth are respectively provided on the fitting surface between the connecting seat and the support rod, and a group of teeth are arranged in an array circumferentially around the rotating axis core of the connecting seat and the support rod, and when the connecting seat and the support rod are axially tightly fitted, the teeth on both sides engage with each other. As a preferred embodiment of the present application, in a support frame for a wheelchair in the present application, a group of teeth are respectively provided on the fitting surface between the connecting seat and the support rod, and when the first locking component axially locks the connecting seat and the support rod, and the connecting seat and the support rod are axially tightly fitted, the teeth on both sides engage with each other, and the support rod cannot rotate around the first locking component. When the first locking component is unlocked, the connecting seat is separated from the support rod, the teeth on both sides are separated from each other, and the support rod can rotate around the first locking component.

[0012] Furthermore, in a support frame for a wheelchair in the present application, a support surface is provided on the support portion, a first pivot is provided between the support portion and the support rod, and the support portion is rotatably and adjustably connected to the support rod around the first pivot, so that the support surface fits the user's lower limbs. As a preferred embodiment of the present application, the support surface in the support frame for a wheelchair in the present application is used to fit the user's lower limbs. During use, the user rotates and adjusts the support portion via the first pivot so that the support surface fits the user's lower limbs.

[0013] Furthermore, in a support frame for a wheelchair in the present application, a second pivot is provided between the first pivot and the support rod, the axis of the second pivot is perpendicular to the first pivot, and the first pivot is rotatably connected to the support rod around the second pivot. As a preferred embodiment of the present application, the second pivot in the support frame for a wheelchair in the present application is used to axially connect the first pivot and the support rod, the first pivot can rotate around the axis of the second pivot, and the rotation direction of the first pivot around the axis of the second pivot is perpendicular to the rotation direction of the support portion around the first pivot.

[0014] Furthermore, in a support frame for a wheelchair in the present application, a pair of locking screws are provided axially through the first pivot, a fastening plate is threadedly connected to the front end of the locking screw, the fastening plate is embedded in the support, the support is provided with a pair of cavities corresponding to the fastening plates, the cavities are provided with a pair of side walls for limiting the rotation of the fastening plates, the support is provided with a pair of arcuate grooves corresponding to the pair of locking screws, the arcuate grooves are concentric with the rotation axis of the first pivot, the pair of locking screws are provided with a pair of arcuate grooves, the pair of locking screws axially connect the support and the first pivot, and when the pair of locking screws lock the support and the first pivot, the pair of locking screws axially lock the support and the first pivot, so that the support and the first pivot are tightly fitted axially. As a preferred embodiment of the present application, the pair of locking screws and fastening plates in the support frame for a wheelchair in the present application limit the support, so that the support is in a limited or rotatable adjustment state. When the user needs to adjust the support part, the locking screw is loosened to separate the support part and the first pivot. After adjusting the support part to a suitable angle, the locking screw is locked. When the support part and the first pivot part are tightly fitted, the support part is limited. During the rotation adjustment process of the support part, the fastening plate in the cavity and the locking screw in the arc groove move accordingly with the support part. A pair of side walls are used to limit the rotation of the fastening plate in the cavity to prevent the fastening plate from rotating with the locking screw during tightening or loosening the locking screw.

[0015] Furthermore, in a wheelchair support frame of the present application, a circumferential limiting structure is provided on a pair of axially mating surfaces between the support portion and the first pivot shaft, the circumferential limiting structure comprising at least one set of limiting teeth and grooves corresponding to the limiting teeth, the limiting teeth and grooves being respectively provided on the pair of axially mating surfaces between the support portion and the first pivot shaft; the set of limiting teeth being arranged in an array along a predetermined arc direction, the arc direction being concentric with the rotation axis of the first pivot shaft. As a preferred embodiment of the present application, in a wheelchair support frame of the present application, when the pair of locking screws and the fastening plate lock the support portion and the first pivot shaft, and the support portion and the first pivot shaft are axially tightly mated, the limiting teeth and the grooves engage with each other, limiting the support portion so that the support portion cannot rotate about the first pivot shaft; when the locking screws and the fastening plate release the lock between the support portion and the first pivot shaft, the support portion and the first pivot shaft are separated, the limiting teeth and the grooves separate from each other, and the support portion can rotate about the first pivot shaft.

[0016] Furthermore, the support frame for a wheelchair in the present application further includes: a sling assembly, the sling assembly including: a sling mounting seat, a sling, the sling mounting seat being detachably mounted on the support rod, the blocking portion being provided with a through slot, one end of the sling passing through the through slot and connected to the supporting portion, and the other end of the sling being connected to the sling mounting seat. As a preferred embodiment of the present application, the sling in the support frame for a wheelchair in the present application, when the supporting portion is a foot pedal for supporting the user's feet, if the user's lower limbs need to be raised to a high height, the user's heels and calves are not supported, which can easily cause the feet to slip off the supporting portion, causing injury to the user. When the user raises his or her lower limbs, the sling is used to support the user's heels and calves.

[0017] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0018] The support frame on a wheelchair in the present application can be detachably installed on the wheelchair. After the user installs the connecting seat on the finished wheelchair through the clamping part, the user can sit in the wheelchair and adjust the support frame according to his or her own needs to raise the injured part, speed up the blood circulation speed of the injured part, promote venous blood return of the injured part, and better recover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A simplified diagram of the installation and use of a support frame on a wheelchair in an embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of a support frame on a wheelchair in an embodiment of the present application;

[0021] Figure 3 This is an exploded view of a first locking component corresponding to a support frame on a wheelchair in an embodiment of the present application;

[0022] Figure 4 A front view of a first pivot corresponding to a support frame on a wheelchair in an embodiment of the present application;

[0023] Figure 5 A rear view of a first pivot corresponding to a support frame on a wheelchair in an embodiment of the present application;

[0024] Figure 6 A side view of a supporting portion corresponding to a support frame on a wheelchair in an embodiment of the present application;

[0025] Figure 7 A bottom view of a supporting portion corresponding to a support frame on a wheelchair in an embodiment of the present application;

[0026] Figure 8 for Figure 7 Sectional view of the AA section.

[0027] In the figure: 1-connecting seat; 11-clamping part; 111-clamping seat; 112-clamping block; 113-clamping cavity; 2-support rod; 21-fixing rod; 22-telescopic rod; 221-second positioning hole; 23-second locking component; 24-first positioning hole; 3-supporting part; 30-receiving cavity; 31-supporting surface; 310-arc groove; 32-anti-slip protrusion; 33-blocking part; 331-through groove; 4-first locking component; 41-screw; 5-tooth portion; 6-first pivot; 61-second pivot; 62-locking screw; 63-fastening plate; 64-clamping plate; 65-notch; 71-limiting tooth portion; 72-notch; 8-sling assembly; 81-sling mounting seat; 82-sling; 83-connecting plate; 831-second notch. DETAILED DESCRIPTION Example

[0028] like Figure 1 、 2 As shown, a wheelchair support frame is used to be installed on a finished wheelchair, comprising: a connecting seat 1, a support rod 2, a support portion 3, and a first locking component 4. The connecting seat 1 is provided with a clamping portion 11. The support rod 2 is rotatably connected to the connecting seat 1. The first locking component 4 is used to lock the rotation adjustment angle of the support rod 2. The support portion 3 is connected to the support rod 2 and is used to support the user's lower limbs. During use, the clamping portion 11 is used to install the connecting seat 1 on the finished wheelchair, and the support portion 3 is located at the front of the finished wheelchair. The connecting seat 1 is detachably installed on the finished wheelchair via the clamping portion 11, making it easy for the user to modify the finished wheelchair without having to replace the entire wheelchair. The first locking component 4 is used to lock the rotation adjustment angle of the support rod 2. The user can freely adjust the rotation angle of the support rod 2 according to the required lower limb elevation and lock the support rod 2 using the first locking component 4. The support portion 3 is used to support the user's lower limbs.

[0029] In this embodiment, the number of the clamping parts 11 is 2, and the clamping parts 11 include: a clamping seat 111, a clamping block 112, the clamping seat 111 and the clamping block 112 are detachably connected, and a pair of clamping cavities 113 are provided between the clamping seat 111 and the clamping block 112, and the pair of clamping cavities 113 are respectively used to accommodate the connecting seat 1 and the finished wheelchair mounting column; specifically, the clamping seat 111 and the clamping block 112 are connected by two threaded fasteners, and the connecting seat 1 and the finished wheelchair are connected through the clamping part 11.

[0030] In this embodiment, the support rod 2 includes a fixed rod 21, a telescopic rod 22, and a second locking component 23. The telescopic rod 22 is movably connected to the fixed rod 21 and can be telescoped and adjusted along the extension direction of the fixed rod 21. The second locking component 23 is used to lock the position of the telescopic rod 22 on the fixed rod 21. The support portion 3 is connected to the telescopic rod 22. The telescopic rod 22 can be telescoped and adjusted along the extension direction of the fixed rod 21. The user can limit the position of the telescopic rod 22 using the second locking component 23, so that the telescopic rod 22 is locked at different positions on the fixed rod 21 to accommodate users with different leg lengths.

[0031] In this embodiment, the fixing rod 21 is provided with a first positioning hole 24 at one end near the telescopic rod 22, and the telescopic rod 22 is provided with a group of second positioning holes 221 along the axial direction. The second locking component 23 includes a pin and a nut, and the nut is screwed on the end of the pin. When the telescopic rod 22 moves to the point where the first positioning hole 24 coincides with the second positioning hole 221, the pin passes through the first positioning hole 24 and the second positioning hole 221 to limit the telescopic rod 22. The first positioning hole 24 and the second positioning hole 221 are located between the pin head and the nut of the pin. There are 9 second positioning holes 221, and the spacing between each second positioning hole 221 is 20 mm.

[0032] In this embodiment, the first locking component 4 is a threaded locking component. The first locking component 4 is arranged at the rotational connection between the connecting seat 1 and the support rod 2. The first locking component 4 axially connects the connecting seat 1 and the support rod 2. When the first locking component 4 locks the connecting seat 1 and the support rod 2, the first locking component 4 axially locks the connecting seat 1 and the support rod 2, so that the connecting seat 1 and the support rod 2 are tightly fitted axially. The first locking component 4 limits the support rod 2, so that the support rod 2 is in a limited or rotatable adjustment state. When the user needs to adjust the support rod 2, the first locking component 4 is loosened to separate the connecting seat 1 and the support rod 2. After adjusting the support rod 2 to a suitable angle, the first locking component 4 is locked. When the connecting seat 1 and the support rod 2 are tightly fitted, the limiting of the support rod 2 is completed.

[0033] In this embodiment, the first locking component 4 includes a screw 41, a nut being threadedly connected to the front end of the screw 41. The screw 41 passes through the connecting base 1 and the support rod 2, and the connecting base 1 and the support rod 2 are arranged between the screw head and the nut of the screw 41. The first locking component 4 uses the screw 41 and the nut to axially lock the connecting base 1 and the support rod 2, thereby limiting the position of the support rod 2. At the same time, the screw 41 also serves as the axis of rotation for the support rod 2 to rotate around the connecting base 1.

[0034] In other embodiments, the first locking component 4 can be in the form of a screw and two nuts, the two nuts are respectively screwed on the two ends of the screw, the connecting seat 1 and the support rod 2 are arranged between the two nuts, and the two nuts axially lock the connecting seat 1 and the support rod 2 to limit the support rod 2; or, the first locking component 4 can also be in the form of a single screw, the connecting seat 1 is provided with a screw hole corresponding to the screw, the first locking component 4 is screwed on the connecting seat 1 with the screw hole, the screw is passed through the support rod 2, and the support rod 2 is arranged between the connecting seat 1 and the screw head of the screw, and the first locking component 4 axially locks the connecting seat 1 and the support rod 2 to limit the support rod 2.

[0035] like Figure 3 As shown, in this embodiment, a group of teeth 5 is provided on the fitting surface between the connecting seat 1 and the support rod 2, and a group of teeth 5 is arranged in an array around the circumference of the rotating axis of the connecting seat 1 and the support rod 2. When the connecting seat 1 and the support rod 2 are tightly fitted axially, the teeth 5 on both sides engage with each other. A group of teeth 5 is provided on the fitting surface between the connecting seat 1 and the support rod 2. When the first locking component 4 axially locks the connecting seat 1 and the support rod 2, and the connecting seat 1 and the support rod 2 are tightly fitted axially, the teeth 5 on both sides engage with each other, and the support rod 2 cannot rotate around the first locking component 4. When the first locking component 4 is unlocked, the connecting seat 1 is separated from the support rod 2, the teeth 5 on both sides are separated from each other, and the support rod 2 can rotate around the first locking component 4.

[0036] In this embodiment, the support portion 3 is provided with a support surface 31. A first pivot 6 is provided between the support portion 3 and the support rod 2. The support portion 3 is rotatably and adjustably connected to the support rod 2 about the first pivot 6, so that the support surface 31 fits the user's lower limb. The support surface 31 is configured to fit the user's lower limb. During use, the user rotates and adjusts the support portion 3 via the first pivot 6 to fit the support surface 31 to the user's lower limb.

[0037] In this embodiment, the support portion 3 is a foot pedal for supporting the user's feet. The support portion 3 is provided with an anti-slip protrusion 32 for anti-slip. The support portion 3 is also provided with a stopper 33 on the side away from the telescopic rod 22. The stopper 33 is used to prevent the user's feet from sliding sideways from the support portion 3; in other embodiments, the support portion 3 can be a cylinder, and the user's lower limbs are placed on the side of the cylinder.

[0038] In this embodiment, a second pivot 61 is provided between the first pivot 6 and the support rod 2. The axis of the second pivot 61 is perpendicular to the first pivot 6. The first pivot 6 is rotatably connected to the support rod 2 about the second pivot 61. The second pivot 61 is used to axially connect the first pivot 6 and the support rod 2. The first pivot 6 can rotate about the axis of the second pivot 61. The rotation direction of the first pivot 6 about the axis of the second pivot 61 is perpendicular to the rotation direction of the support portion 3 about the first pivot 6.

[0039] In this embodiment, the second pivot 61 is a screw, and a nut is screwed on the end of the second pivot 61. A pair of clips 64 are provided on the first pivot 6. The second pivot 61 passes through the first pivot 6, a pair of clips 64, and the support rod 2, and the support rod 2 is located between the pair of clips 64; an open slot 65 is provided on one side of the first pivot 6, and the second pivot 61 passes through both sides of the slot 65. The end of the support rod 2 near the second pivot 61 is arranged in the slot 65, and the slot 65 is used to accommodate the end of the support rod 2.

[0040] like Figure 4 、 5 As shown in Figures 6, 7, and 8, in this embodiment, a pair of locking screws 62 are axially passed through the first pivot 6, and a fastening piece 63 is threadedly connected to the front end of the locking screw 62. The fastening piece 63 is buried in the support portion 3, and the support portion 3 is provided with a pair of cavities 30 corresponding to the fastening piece 63. A pair of side walls for limiting the rotation of the fastening piece 63 are provided in the cavity 30. Specifically, the distance between the pair of side walls (i.e., the width of the cavity) is less than the length of the fastening piece 63. 3 is provided with a pair of arcuate grooves 310 corresponding to the pair of locking screws 62. The arcuate grooves 310 are concentric with the rotation axis of the first pivot 6. The pair of locking screws 62 pass through the pair of arcuate grooves 310. The pair of locking screws 62 axially connect the support portion 3 and the first pivot 6. When the pair of locking screws 62 lock the support portion 3 and the first pivot 6, the pair of locking screws 62 axially lock the support portion 3 and the first pivot 6, so that the support portion 3 and the first pivot 6 are tightly axially fitted. The pair of locking screws 62 and the fastening piece 63 limit the support portion 3, so that the support portion 3 is in a limited or rotatable adjustment state. When the user needs to adjust the support part 3, loosen the locking screw 62 to separate the support part 3 and the first pivot 6. After adjusting the support part 3 to a suitable angle, lock the locking screw 62. When the support part 3 and the first pivot 6 are tightly fitted, the support part 3 is limited. During the rotation adjustment process of the support part 3, the fastening piece 63 in the cavity 30 and the locking screw 62 in the arc groove 310 move accordingly with the support part 3. A pair of side walls are used to limit the rotation of the fastening piece 63 in the cavity 30 to prevent the fastening piece 63 from rotating with the locking screw 62 during the process of tightening or loosening the locking screw 62.

[0041] In this embodiment, a circumferential limiting structure is provided on a pair of axial fitting surfaces between the support portion 3 and the first pivot 6, and the circumferential limiting structure includes at least one group of limiting teeth 71 and grooves 72 corresponding to the limiting teeth 71, and the limiting teeth 71 and the grooves 72 are respectively arranged on a pair of axial fitting surfaces between the support portion 3 and the first pivot 6; a group of the limiting teeth 71 are arranged in an array along a preset arc direction, and the arc direction is concentric with the rotation axis core of the first pivot 6. When a pair of the locking screws 62 and the fastening plate 63 lock the support part 3 and the first pivot 6, and the support part 3 and the first pivot 6 are axially tightly fitted, the limiting tooth portion 71 and the groove portion 72 engage with each other to limit the support part 3 so that the support part 3 cannot rotate around the first pivot 6. When the locking screws 62 and the fastening plate 63 release the lock on the support part 3 and the first pivot 6, the support part 3 is separated from the first pivot 6, the limiting tooth portion 71 and the groove portion 72 are separated from each other, and the support part 3 can rotate around the first pivot 6.

[0042] In this embodiment, the limiting teeth 71 are provided in pairs in two groups, each group having eight teeth. The arc groove 310 is provided within the setting range of the groove portion 72. The rotation angle of the support portion 3 can be adjusted by 6.5° per gear, with a total of five gears.

[0043] This embodiment further includes a sling assembly 8, which includes a sling mounting seat 81 and a sling 82. The sling mounting seat 81 is detachably mounted on the support rod 2. The blocking portion 33 is provided with a through slot 331. One end of the sling 82 passes through the through slot 331 and is connected to the support portion 3. The other end of the sling 82 is connected to the sling mounting seat 81. The sling 82 is used to support the support portion 3 as a footrest for supporting the user's feet. If the user's lower limbs need to be raised to a high height, the user's heels and calves are not supported, which can easily cause the feet to slip off the support portion 3, causing injury to the user. When the user raises his or her lower limbs, the sling 82 is used to support the user's heels and calves.

[0044] In this embodiment, a connecting plate 83 is provided at the connection between the sling 82 and the sling mounting seat 81. The connecting plate 83 is connected to the sling mounting seat 81 by screws. A second notch 831 is provided on the connecting plate 83. The surface of the sling 82 is provided with a Velcro surface and a Velcro hook surface. The two ends of the sling 82 pass through the second notch 831 and the through groove 331 respectively, and then the end of the sling 82 is folded in half to make the Velcro surface and the Velcro hook surface on the surface adhere to connect the supporting portion 3 and the connecting plate 83.

[0045] The above description of the technical principles of the present invention in conjunction with specific embodiments is intended solely to illustrate the principles of the present invention and is not to be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present invention without inventive effort, and such implementations will fall within the scope of protection of the present invention.

Claims

1. A wheelchair support frame, for installation on a finished wheelchair, characterized by: include: A connecting seat (1), a support rod (2), a supporting portion (3), and a first locking component (4); the connecting seat (1) is provided with a clamping portion (11); the support rod (2) is rotatably and adjustably connected to the connecting seat (1); the first locking component (4) is used to lock the rotation adjustment angle of the support rod (2); the supporting portion (3) is connected to the support rod (2); the supporting portion (3) is used to support the lower limbs of a user; when in use, the clamping portion (11) is used to install the connecting seat (1) on a finished wheelchair; the supporting portion (3) is located on the front side of the finished wheelchair.

2. The support frame for a wheelchair according to claim 1, characterized in that: The support rod (2) comprises: a fixed rod (21), a telescopic rod (22), and a second locking component (23); the telescopic rod (22) is movably connected to the fixed rod (21); the telescopic rod (22) can be telescopically adjusted along the extension direction of the fixed rod (21); the second locking component (23) is used to lock the position of the telescopic rod (22) on the fixed rod (21); and the support portion (3) is connected to the telescopic rod (22).

3. The support frame for a wheelchair according to claim 1, characterized in that: The first locking component (4) is a threaded locking component. The first locking component (4) is arranged at the rotational connection between the connecting seat (1) and the support rod (2). The first locking component (4) axially connects the connecting seat (1) and the support rod (2). When the first locking component (4) locks the connecting seat (1) and the support rod (2), the first locking component (4) axially locks the connecting seat (1) and the support rod (2), so that the connecting seat (1) and the support rod (2) are tightly fitted axially.

4. The support frame for a wheelchair according to claim 3, characterized in that: The first locking component (4) comprises a screw (41), the front end of the screw (41) being threadedly connected to a nut, the screw (41) passing through a connecting seat (1) and a support rod (2), and the connecting seat (1) and the support rod (2) being arranged between the screw head of the screw (41) and the nut.

5. The support frame for a wheelchair according to claim 3, characterized in that: A group of teeth (5) is provided on the mating surfaces between the connecting seat (1) and the support rod (2), and the group of teeth (5) is arranged in an array circumferentially around the rotating axis of the connecting seat (1) and the support rod (2). When the connecting seat (1) and the support rod (2) are tightly fitted axially, the teeth (5) on both sides mesh with each other.

6. The support frame for a wheelchair according to claim 2, characterized in that: A supporting surface (31) is provided on the supporting portion (3), a first pivot (6) is provided between the supporting portion (3) and the support rod (2), and the supporting portion (3) is rotatably and adjustably connected to the support rod (2) around the first pivot (6) so as to make the supporting surface (31) fit the lower limbs of the user.

7. The support frame for a wheelchair according to claim 6, characterized in that: A second pivot (61) is provided between the first pivot (6) and the support rod (2), the axis of the second pivot (61) being perpendicular to the first pivot (6), and the first pivot (6) being rotatably connected to the support rod (2) around the second pivot (61).

8. The support frame for a wheelchair according to claim 7, characterized in that: A pair of locking screws (62) are provided in the axial direction of the first pivot (6), and a fastening piece (63) is threadedly connected to the front end of the locking screw (62). The fastening piece (63) is embedded in the support portion (3). The support portion (3) is provided with a pair of cavities (30) corresponding to the fastening piece (63). A pair of side walls for limiting the rotation of the fastening piece (63) are provided in the cavity (30). The support portion (3) is provided with a pair of arc grooves (310) corresponding to the pair of locking screws (62). ), the arc groove (310) is concentric with the rotation axis of the first pivot (6), a pair of the locking screw members (62) are provided with a pair of arc grooves (310), and the pair of the locking screw members (62) axially connect the support portion (3) and the first pivot (6). When the pair of the locking screw members (62) lock the support portion (3) and the first pivot (6), the pair of the locking screw members (62) axially lock the support portion (3) and the first pivot (6), so that the support portion (3) and the first pivot (6) are axially tightly fitted.

9. The support frame for a wheelchair according to claim 8, characterized in that: A circumferential limiting structure is provided on a pair of axially fitting surfaces between the support portion (3) and the first pivot (6), and the circumferential limiting structure includes at least one group of limiting teeth (71) and grooves (72) corresponding to the limiting teeth (71), and the limiting teeth (71) and the grooves (72) are respectively arranged on a pair of axially fitting surfaces between the support portion (3) and the first pivot (6); a group of the limiting teeth (71) is arranged in an array along a preset arc direction, and the arc direction is concentric with the rotation axis core of the first pivot (6).

10. The support frame for a wheelchair according to claim 1, characterized in that: Also includes: A sling assembly (8), the sling assembly (8) comprising: a sling mounting seat (81), a sling (82), the sling mounting seat (81) being detachably mounted on the support rod (2), the blocking portion (33) being provided with a through slot (331), one end of the sling (82) passing through the through slot (331) and connected to the supporting portion (3), and the other end of the sling (82) being connected to the sling mounting seat (81).

Images