Wheelchair framework and wheelchair

Abstract

The invention provides a wheelchair framework and a wheelchair. The wheelchair framework comprises a backrest rod, a seat rod, a front supporting rod and a rear supporting rod. The first end of the seat rod is hinged to the backrest rod, the second end of the seat rod is hinged to the first end of the front supporting rod, the second end of the front supporting rod is used for being connected with a front wheel, the first end of the rear supporting rod is hinged to the first end of the backrest rod, and the second end of the rear supporting rod is used for being connected with a rear wheel. When the wheelchair framework is converted from the unfolding state to the folding state, the backrest rod is folded towards the second end of the seat rod around the hinge point of the backrest rod and the seat rod; the rear supporting rod and the rear wheel are folded towards the second end of the seat rod around the hinge point of the rear supporting rod and the backrest rod; the front supporting rod and the front wheel are folded towards the first end of the seat rod around the hinge point of the front supporting rod and the seat rod. According to the wheelchair, the first end of the rear supporting rod is hinged to the first end of the backrest rod, so that the length of the rear supporting rod is shortened, and compared with the scheme in the related technology, the size of the folded wheelchair can be further reduced.

Description

Technical Field

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

[0002] A wheelchair is a chair with wheels that can help replace walking. It is an important means of transportation for special groups of people (such as the injured, the sick, and the disabled) to recover at home, to transport around, to see a doctor, and to go out for activities. Wheelchairs not only meet the transportation needs of special groups of people, allowing them to exercise and participate in social activities with the help of wheelchairs, but also make it easier for family members to move and take care of special groups of people.

[0003] Although wheelchairs provide convenience for users to carry out medium and long-distance activities, they take up a lot of space when stored. In order to solve the above problem, a foldable wheelchair is provided in the related art. After folding, the volume of the wheelchair is reduced, thereby solving the problem of large storage space occupation and making it convenient for users or caregivers to carry and transport the wheelchair.

[0004] However, due to the structure of the wheelchair frame, the wheelchair in the related art is still relatively large after being folded. Summary of the invention

[0005] In order to overcome the above-mentioned defects in the related art, the purpose of the present application is to provide a wheelchair frame and a wheelchair, which can further reduce the volume of the wheelchair after folding.

[0006] On the one hand, the present application provides a wheelchair frame, comprising a backrest rod, a seat rod, a front support rod and a rear support rod; the first end of the seat rod is hinged to the backrest rod, the second end of the seat rod is hinged to the first end of the front support rod, the second end of the front support rod is used to connect to the front wheel, the first end of the rear support rod is hinged to the first end of the backrest rod, and the second end of the rear support rod is used to connect to the rear wheel;

[0007] The wheelchair frame has a relative unfolded state and a folded state. In the unfolded state, the seat rod is horizontally arranged, the backrest rod, the front support rod and the rear support rod are all inclined to the seat rod, and the backrest rod and the front support rod and the rear support rod are respectively located on both sides of the seat rod; when the wheelchair frame is converted from the unfolded state to the folded state, the backrest rod is folded toward the second end of the seat rod around the hinge point between the backrest rod and the seat rod; the rear support rod and the rear wheel are folded toward the second end of the seat rod around the hinge point between the rear support rod and the backrest rod; the front support rod and the front wheel are folded toward the first end of the seat rod around the hinge point between the front support rod and the seat rod.

[0008] In a possible implementation, the backrest rod includes a backrest rod body and a backrest rod connecting section;

[0009] The seat rod comprises a seat rod main body and a seat rod connecting section. In the unfolded state, the seat rod connecting section is located at a first end of the seat rod main body and is arranged away from the rear support rod. One end of the seat rod connecting section away from the seat rod main body is hinged to the middle part of the backrest rod main body.

[0010] The front support rod comprises a front support rod body and a front support rod connecting section. In the unfolded state, the front support rod connecting section is located at the first end of the front support rod body and is arranged toward one side of the seat rod. The front support rod is hinged to the second end of the seat rod body through the front support rod connecting section.

[0011] The first end of the rear support rod is hinged to the backrest rod connecting section.

[0012] In a possible implementation, the rear support rod comprises a rear support rod body and a rear support rod connecting section, in the unfolded state, the backrest rod connecting section is located at the first end of the backrest rod body and is arranged toward one side of the seat rod, the rear support rod connecting section is located at the first end of the rear support rod body and is arranged toward one side of the seat rod, and one end of the rear support rod connecting section away from the rear support rod body is hinged to one end of the backrest rod connecting section away from the backrest rod body;

[0013] When the wheelchair frame is converted from the unfolded state to the folded state, the backrest rod is folded toward the second end of the seat rod around the hinge point of the backrest rod body and the seat rod connecting section, so that the first end of the backrest rod body drives the backrest rod connecting section and the rear support rod connecting section to move toward the side away from the seat rod; the rear support rod body is folded toward the second end of the seat rod around the hinge point of the backrest rod connecting section and the rear support rod connecting section; the front support rod and the front wheel are folded toward the first end of the seat rod around the hinge point of the front support rod connecting section and the seat rod body.

[0014] In a possible implementation, the rear support rod comprises a rear support rod body and a rear support rod connecting section, in the unfolded state, the backrest rod connecting section is located at the first end of the backrest rod body and is arranged toward one side of the seat rod, the rear support rod connecting section is located at the first end of the rear support rod body and is arranged toward one side of the seat rod, and one end of the rear support rod connecting section away from the rear support rod body is hinged to one end of the backrest rod connecting section away from the backrest rod body;

[0015] It also includes a connecting rod, the rear support rod body is also provided with a protrusion, the first end of the connecting rod is hinged to the protrusion, and the second end of the connecting rod is hinged to the second end of the seat rod;

[0016] When the wheelchair frame is converted from the unfolded state to the folded state, the backrest rod is folded toward the second end of the seat rod around the hinge point of the backrest rod body and the seat rod connecting section, so that the first end of the backrest rod body drives the backrest rod connecting section and the rear support rod connecting section to move toward the side away from the seat rod, and at the same time, the rear support rod body is folded toward the second end of the seat rod around the hinge point of the protrusion and the connecting rod; the front support rod and the front wheel are folded toward the first end of the seat rod around the hinge point of the front support rod connecting section and the seat rod body.

[0017] In a possible implementation, in the unfolded state, the first end of the backrest rod connecting section is fixedly connected to the first end of the seat rod body, and the second end of the backrest rod connecting section is hinged to the first end of the rear support rod;

[0018] It also includes a main support rod, a first end of the main support rod is hinged to the first end of the backrest rod body, and a second end of the main support rod is hinged to the middle part of the front support rod body;

[0019] When the wheelchair frame is converted from the unfolded state to the folded state, the backrest rod is folded toward the second end of the seat rod around the hinge point of the backrest rod body and the seat rod connecting section, so that the first end of the backrest rod body drives the main support rod and the front support rod body to move toward the rear support rod side, and at the same time, the front support rod body is folded toward the first end of the seat rod around the hinge point of the front support rod body and the main support rod; the rear support rod and the rear wheel are folded toward the second end of the seat rod around the hinge point of the rear support rod and the backrest rod connecting section.

[0020] In a possible implementation, the rear support rod comprises a rear support rod body and a rear support rod connecting section, in the unfolded state, the backrest rod connecting section is located at the first end of the backrest rod body and is arranged toward one side of the seat rod, the rear support rod connecting section is located at the first end of the rear support rod body and is arranged toward one side of the seat rod, and one end of the rear support rod connecting section away from the rear support rod body is hinged to one end of the backrest rod connecting section away from the backrest rod body;

[0021] It also includes a connecting rod and a main support rod, the rear support rod body is also provided with a protrusion, the first end of the connecting rod is hinged to the protrusion, and the second end of the connecting rod is hinged to the second end of the seat rod; the first end of the main support rod is hinged to the first end of the backrest rod body, and the second end of the main support rod is hinged to the middle part of the front support rod body;

[0022] When the wheelchair frame is converted from the unfolded state to the folded state, the backrest rod is folded toward the second end of the seat rod around the hinge point of the backrest rod body and the seat rod connecting section, so that the first end of the backrest rod body drives the backrest rod connecting section, the rear support rod connecting section, the main support rod and the front support rod body to move toward the side away from the seat rod, and at the same time, the rear support rod body is folded toward the second end of the seat rod around the hinge point between the protrusion and the connecting rod, and the front support rod body is folded toward the first end of the seat rod around the hinge point between the front support rod body and the main support rod.

[0023] In a possible implementation, in the folded state, the length of the backrest rod, the length of the seat rod, the length of the front support rod and the front wheel, and the length of the rear support rod and the rear wheel are all equal.

[0024] In a possible implementation, the backrest rod, seat rod, front support rod, rear support rod, connecting rod and main support rod are each provided with two, and the two backrest rods, seat rod, front support rod, rear support rod, connecting rod and main support rod are respectively located on the left and right sides of the wheelchair frame.

[0025] In one possible implementation, the two rear support rods and the seat rod connecting section are both located between the two backrest rods, the two connecting rods are located between the two seat rods, the two backrest rods are located between the first ends of the two main support rods, and the second ends of the two main support rods are located between the two front support rods.

[0026] In a possible implementation, a foot pedal is further provided between the two front support rods, and the foot pedal is hingedly connected to the two main support rods;

[0027] A connecting rod assembly is provided on the left and right sides of the foot pedal, and the two connecting rod assemblies are respectively hinged to the two main support rods; the connecting rod assembly includes a first connecting rod and a second connecting rod, the first end of the first connecting rod is hinged to the middle part of the main support rod, the second end of the first connecting rod is hinged to the first end of the second connecting rod, and the second end of the second connecting rod is hinged to the front support rod body and the foot pedal.

[0028] On the other hand, the present application provides a wheelchair comprising any wheelchair frame as described above.

[0029] The present application provides a wheelchair frame and a wheelchair, wherein the wheelchair frame comprises a backrest rod, a seat rod, a front support rod and a rear support rod; the first end of the seat rod is hinged to the backrest rod, the second end of the seat rod is hinged to the first end of the front support rod, the second end of the front support rod is used to connect the front wheel, the first end of the rear support rod is hinged to the first end of the backrest rod, and the second end of the rear support rod is used to connect the rear wheel; the wheelchair frame has a relative unfolded state and a folded state, in which the seat rod is horizontally arranged, the backrest rod, the front support rod and the rear support rod are all inclined to the seat rod, and the backrest rod and the front support rod and the rear support rod are respectively located on both sides of the seat rod; when the wheelchair frame is converted from the unfolded state to the folded state, the backrest rod folds toward the second end of the seat rod around the hinge point between the backrest rod and the seat rod; the rear support rod and the rear wheel fold toward the second end of the seat rod around the hinge point between the rear support rod and the backrest rod; the front support rod and the front wheel fold toward the first end of the seat rod around the hinge point between the front support rod and the seat rod. When the wheelchair of the present application is folded, the front support rod and the front wheel are folded toward the first end of the seat rod, the rear support rod and the rear wheel are folded toward the second end of the seat rod, and the backrest rod is folded toward the second end of the seat rod; after folding, the backrest rod, the seat rod, the front support rod and the rear support rod are substantially parallel. Since the first end of the rear support rod is hinged to the first end of the backrest rod in the present application, the length of the rear support rod is shortened. Compared with the solutions in the related art, the present application can further reduce the volume of the wheelchair after folding. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 It is a structural schematic diagram of a wheelchair frame in the related art;

[0032] Figure 2(a)-Figure 2(d) A schematic diagram of the structure of a wheelchair frame in different states provided by an embodiment of the present application;

[0033] Figure 3(a)-Figure 3(e) A schematic diagram of the structure of a wheelchair frame in different states provided by another embodiment of the present application;

[0034] Figure 4(a)-Figure 4(d) A schematic diagram of the structure of a wheelchair frame in different states provided by yet another embodiment of the present application;

[0035] Figure 5(a)-Figure 5(d) A schematic diagram of the structure of a wheelchair frame in different states provided by another embodiment of the present application;

[0036] Figure 6(a)-Figure 6(d)A schematic structural diagram of a wheelchair frame in different states provided in yet another embodiment of the present application.

[0037] Reference numerals:

[0038] 1- Backrest rod;

[0039] 2- Seat rod;

[0040] 3-Front support bar;

[0041] 4-Rear support bar;

[0042] 5-Transfer rod;

[0043] 6-Front wheel;

[0044] 7-Rear wheel;

[0045] 100-backrest rod; 110-backrest rod body; 120-backrest rod connecting section;

[0046] 200-seat rod; 210-seat rod body; 220-seat rod connecting section;

[0047] 300-front support rod; 310-front support rod body; 320-front support rod connecting section;

[0048] 400-rear support rod; 410-rear support rod body; 420-rear support rod connecting section; 430-protrusion;

[0049] 500-front wheel;

[0050] 600-rear wheel;

[0051] 700-connecting rod;

[0052] 800-main support rod;

[0053] 900-foot pedal; 910-first connecting rod; 920-second connecting rod;

[0054] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0056] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0057] As described in the background art, the wheelchair in the related art is limited by the structure of the wheelchair frame and its volume is still large after folding. Figure 1 For a schematic diagram of the structure of a wheelchair frame in the related art, please refer to Figure 1 . In the related art, the wheelchair frame includes a backrest rod 1, a seat rod 2, a front support rod 3, a rear support rod 4 and a transfer rod 5. Among them, the first end of the seat rod 2 is hinged to the middle part of the backrest rod 1; the first end of the front support rod 3 is hinged to the second end of the seat rod 2, and the second end of the front support rod 3 is connected to the front wheel 6; the rear support rod 4 is tilted, the first end of the rear support rod 4 is hinged to the second end of the seat rod 2, and the second end of the rear support rod 4 is connected to the rear wheel 7; the second end of the seat rod 2 is connected to the middle part of the rear support rod 4 through the transfer rod 5. When folding, along the direction of the arrow in the figure, first fold the front wheel 6 and the front support rod 3 toward the rear support rod 4, and store the front wheel 6 and the front support rod 3; then fold the transfer rod 5 around the hinge point with the rear support rod 4 toward the rear support rod 4, lower the backrest rod 1 and the seat rod 2 as a whole, and store the seat rod 2; finally, fold the backrest rod 1 toward the seat rod 2, store the backrest rod 1, and complete the entire folding process.

[0058] The applicant has discovered through research that the seat rod 2, front support rod 3 and rear support rod 4 in the wheelchair frame of the related technology can roughly form a triangle, with the rear support rod 4 being the longest side of the triangle. Also, because all components are folded based on the rear support rod 4, and the length of the rear support rod 4 is relatively long, the volume of the wheelchair is still relatively large after folding.

[0059] In view of this, the embodiment of the present application aims to provide a wheelchair frame and a wheelchair, wherein the first end of the seat rod is hinged to the backrest rod, the second end of the seat rod is hinged to the first end of the front support rod, the second end of the front support rod is used to connect the front wheel, the first end of the rear support rod is hinged to the first end of the backrest rod, and the second end of the rear support rod is used to connect the rear wheel. When the wheelchair is folded, the backrest rod is folded around the hinge point between the backrest rod and the seat rod toward the second end of the seat rod; the rear support rod and the rear wheel are folded around the hinge point between the rear support rod and the backrest rod toward the second end of the seat rod; the front support rod and the front wheel are folded around the hinge point between the front support rod and the seat rod toward the first end of the seat rod; after folding, the backrest rod, the seat rod, the front support rod and the rear support rod are substantially parallel. Since the first end of the rear support rod is hinged to the first end of the backrest rod, the length of the rear support rod is shortened. Compared with the solutions in the related art, the embodiment of the present application can further reduce the volume of the wheelchair after folding.

[0060] The contents of the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can understand the contents of the present application in more detail. It should be noted that in the present embodiment, the first direction X, the second direction Y and the third direction Z are three different directions that are perpendicular to each other in a three-dimensional space, wherein the second direction Y can be, for example, the height direction (vertical direction) when the wheelchair is in use, and the third direction Z can be, for example, the width direction when the wheelchair is in use.

[0061] Figure 2(a)-Figure 2(d) This is a schematic diagram of the structure of a wheelchair frame in different states provided by an embodiment of the present application.

[0062] Please refer to Figure 2(a)-Figure 2(d) The present embodiment provides a wheelchair frame, comprising a backrest rod 100, a seat rod 200, a front support rod 300 and a rear support rod 400. The first end of the seat rod 200 is hinged to the backrest rod 100, the second end of the seat rod 200 is hinged to the first end of the front support rod 300, the second end of the front support rod 300 is used to connect the front wheel 500, the first end of the rear support rod 400 is hinged to the first end of the backrest rod 100, and the second end of the rear support rod 400 is used to connect the rear wheel 600.

[0063] In this embodiment, the specific hinged structure between the above-mentioned rods can be set as needed, and this embodiment does not limit this. Since the rods are hingedly connected, the wheelchair frame of this embodiment can be folded, so that the wheelchair frame has a relative unfolded state and a folded state.

[0064] As shown in FIG. 2( a ), in the unfolded state, the seat rod 200 is arranged substantially horizontally (along the first direction X), the backrest rod 100, the front support rod 300 and the rear support rod 400 are all inclined to the seat rod 200, and the backrest rod 100 and the front support rod 300 and the rear support rod 400 are respectively located on both sides of the seat rod 200 along the second direction Y. At this time, the hinge point a between the backrest rod 100 and the seat rod 200, the hinge point b between the front support rod 300 and the seat rod 200, and the hinge point d between the rear support rod 400 and the backrest rod 100 are all in a locked state under the action of the locking mechanism, and the user can push the backrest rod 100 or move the front wheel 500 and the rear wheel 600 along the first direction X through the driving device installed on the wheelchair frame, thereby realizing forward or backward movement.

[0065] When the wheelchair frame is converted from the unfolded state to the folded state, folding can be achieved in three steps. In an optional embodiment, the first step is as shown in FIG. 2(b), the locking mechanism can be unlocked so that all hinge points are in the unlocked state, and the backrest rod 100 is folded around the hinge point a between the backrest rod 100 and the seat rod 200 toward the second end of the seat rod 200, so that the backrest rod 100 is stored. The second step is as shown in FIG. 2(c), the front support rod 300 and the front wheel 500 can be folded around the hinge point b between the front support rod 300 and the seat rod 200 toward the first end of the seat rod 200, so that the front support rod 300 and the front wheel 500 are stored. The third step is as shown in FIG. 2(d), the rear support rod 400 and the rear wheel 600 can be folded around the hinge point d between the rear support rod 400 and the backrest rod 100 toward the second end of the seat rod 200, so that the rear support rod 400 and the rear wheel 600 are stored.

[0066] It should be noted that the above-mentioned embodiment is an optional embodiment and does not limit the order of folding the wheelchair frame; in other possible embodiments, the wheelchair frame can first fold the front support rod 300 and the front wheel 500, then fold the rear support rod 400 and the rear wheel 600, and finally fold the backrest rod 100; or, the rear support rod 400 and the rear wheel 600 can be folded first, then the backrest rod 100, and finally the front support rod 300 and the front wheel 500 can be folded; the specific folding order can be selected according to user needs.

[0067] It can be seen from the above description that when the wheelchair of the present embodiment is folded, the front support rod 300 and the front wheel 500 are folded toward the first end of the seat rod 200, the rear support rod 400 and the rear wheel 600 are folded toward the second end of the seat rod 200, and the backrest rod 100 is folded toward the second end of the seat rod 200. As can be seen from FIG. 2(d), after folding, the backrest rod 100, the seat rod 200, the front support rod 300 and the rear support rod 400 are substantially parallel and substantially rectangular, and their lengths are affected by the longest of the backrest rod 100, the seat rod 200, the front support rod 300 and the rear support rod 400 along the first direction X. In the folded state, the length of the backrest rod 100 along the first direction X, the length of the seat rod 200 along the first direction X, the length of the front support rod 300 and the front wheel 500 along the first direction X, and the length of the rear support rod 400 and the rear wheel 600 along the first direction X are substantially equal, for example, the error range can be within ±100 mm. Preferably, in the folded state, the length of the backrest rod 100 along the first direction X, the length of the seat rod 200 along the first direction X, the length of the front support rod 300 and the front wheel 500 along the first direction X, and the length of the rear support rod 400 and the rear wheel 600 along the first direction X are all equal, so that the volume of the wheelchair frame after folding is minimized, that is, the volume of the wheelchair after folding is minimized.

[0068] Since the first end of the rear support rod 400 is hinged to the first end of the backrest rod 100 in this embodiment, the length of the rear support rod 400 is shortened. Compared with the solutions in the related art, this embodiment can further reduce the volume of the wheelchair after folding.

[0069] Figure 3(a)-Figure 3(e) A schematic diagram of the structure of a wheelchair frame in different states provided by another embodiment of the present application; Figure 4(a)-Figure 4(d) A schematic diagram of the structure of a wheelchair frame in different states provided by another embodiment of the present application; Figure 5(a)-Figure 5(d) A schematic diagram of the structure of a wheelchair frame in different states provided by yet another embodiment of the present application; Figure 6(a)-Figure 6(d) A schematic structural diagram of a wheelchair frame in different states provided in yet another embodiment of the present application.

[0070] Figure 3(a)-Figure 6(d) Four improved forms of wheelchair frames are shown to provide a variety of folding structures, further simplify the folding steps of the wheelchair frame, and facilitate user use.

[0071] The above four improved forms of wheelchair frames have many common structures. Specifically, the backrest rod 100 includes a backrest rod body 110 and a backrest rod connecting section 120. The backrest rod connecting section 120 is inclined to the backrest rod body 110, and the two generally form an "L" shape.

[0072] The seat rod 200 includes a seat rod body 210 and a seat rod connecting section 220. The seat rod connecting section 220 is arranged obliquely to the seat rod body 210, and the two generally form an "L" shape. In the unfolded state, the seat rod connecting section 220 is located at the first end of the seat rod body 210 and is arranged away from the rear support rod 400. The end of the seat rod connecting section 220 away from the seat rod body 210 is hinged to the middle part of the backrest rod body 110.

[0073] The front support bar 300 includes a front support bar body 310 and a front support bar connecting section 320. The front support bar connecting section 320 is arranged obliquely to the front support bar body 310. The structure of the front support bar body 310 can be arranged based on the installation requirements of the front wheel 500. In the unfolded state, the front support bar connecting section 320 is located at the first end of the front support bar body 310 and is arranged toward one side of the seat bar 200. The front support bar 300 is hinged to the second end of the seat bar body 210 through the front support bar connecting section 320.

[0074] The first end of the rear support rod 400 is hinged to the backrest rod connecting section 120 .

[0075] Please continue to refer to Figure 3(a)-Figure 3(e)In a possible implementation, the rear support rod 400 of this embodiment includes a rear support rod body 410 and a rear support rod connecting section 420. The rear support rod connecting section 420 is arranged obliquely to the rear support rod body 410, and the two generally form an "L" shape. In the unfolded state, the backrest rod connecting section 120 is located at the first end of the backrest rod body 110 and is arranged toward the side of the seat rod 200, and the rear support rod connecting section 420 is located at the first end of the rear support rod body 410 and is arranged toward the side of the seat rod 200. The end of the rear support rod connecting section 420 away from the rear support rod body 410 is hinged to the end of the backrest rod connecting section 120 away from the backrest rod body 110.

[0076] As shown in FIG. 3( a ), the shape of the wheelchair frame of the present embodiment in the unfolded state is basically the same as that of the above-mentioned embodiment, that is, the seat rod 200 is arranged substantially horizontally (along the first direction X), the backrest rod 100, the front support rod 300 and the rear support rod 400 are all inclined to the seat rod 200, and the backrest rod 100 and the front support rod 300 and the rear support rod 400 are respectively located on both sides of the seat rod 200 along the second direction Y. At this time, the hinge point a between the backrest rod body 110 and the seat rod connecting section 220, the hinge point b between the seat rod body 210 and the front support rod connecting section 320, and the hinge point d between the backrest rod connecting section 120 and the rear support rod connecting section 420 are all in a locked state under the action of the locking mechanism, and the user can push the backrest rod 100 or move the front wheel 500 and the rear wheel 600 along the first direction X through the driving device installed on the wheelchair frame, so as to realize forward or backward movement.

[0077] When the wheelchair frame of this embodiment is converted from the unfolded state to the folded state, the folding can be achieved in three steps. In an optional embodiment, the first step is as follows: Figure 3(a) and 3(b) As shown, the locking mechanism can be unlocked so that all hinge points are in the unlocked state, and the backrest rod 100 is folded toward the second end of the seat rod 200 around the hinge point a between the backrest rod body 110 and the seat rod connecting section 220, so that the first end of the backrest rod body 110 drives the backrest rod connecting section 120 and the rear support rod connecting section 420 to move along the first direction X toward the side away from the seat rod 200. The second step is as follows Figure 3(c) and 3(d) As shown in FIG. 3( d ), after the backrest rod 100 is folded into place, the rear support rod body 410 can be folded toward the second end of the seat rod 200 around the hinge point d between the backrest rod connecting section 120 and the rear support rod connecting section 420, so that the rear support rod 400 and the rear wheel 600 are stored together. In the third step, as shown in FIG. 3( d ), the front support rod 300 and the front wheel 500 can be folded toward the first end of the seat rod 200 around the hinge point b between the front support rod connecting section 320 and the seat rod body 210, so that the front support rod 300 and the front wheel 500 are stored, forming a structure as shown in FIG. 3( e ).

[0078] It should be noted that the above-mentioned embodiment is an optional embodiment and does not limit the order of folding the wheelchair frame; in other possible embodiments, the wheelchair frame can first fold the front support rod 300 and the front wheel 500, then fold the backrest rod 100, and finally fold the rear support rod 400 and the rear wheel 600.

[0079] Please continue to refer to Figure 4(a)-Figure 4(d) In a possible implementation, the rear support rod 400 of this embodiment includes a rear support rod body 410 and a rear support rod connecting section 420. The rear support rod connecting section 420 is arranged obliquely to the rear support rod body 410, and the two generally form an "L" shape. In the unfolded state, the backrest rod connecting section 120 is located at the first end of the backrest rod body 110 and is arranged toward the side of the seat rod 200, and the rear support rod connecting section 420 is located at the first end of the rear support rod body 410 and is arranged toward the side of the seat rod 200. The end of the rear support rod connecting section 420 away from the rear support rod body 410 is hinged to the end of the backrest rod connecting section 120 away from the backrest rod body 110.

[0080] The wheelchair frame of this embodiment further includes a connecting rod 700, and a protrusion 430 is further provided on the rear support rod body 410. The first end of the connecting rod 700 is hinged to the protrusion 430, and the second end of the connecting rod 700 is hinged to the second end of the seat rod 200. The specific hinge structure of the connecting rod 700, the protrusion 430 and the seat rod 200 can be set as required. The backrest rod 100, the seat rod 200, the connecting rod 700 and the rear support rod 400 of this embodiment form a four-bar linkage.

[0081] As shown in FIG. 4( a ), the shape of the wheelchair frame of the present embodiment in the unfolded state is basically the same as that of the above-mentioned embodiment, that is, the seat rod 200 is arranged substantially horizontally (along the first direction X), the backrest rod 100, the front support rod 300 and the rear support rod 400 are all inclined to the seat rod 200, and the backrest rod 100 and the front support rod 300 and the rear support rod 400 are respectively located on both sides of the seat rod 200 along the second direction Y. At this time, the hinge point a between the backrest rod body 110 and the seat rod connecting section 220, the hinge point b between the seat rod body 210 and the front support rod connecting section 320, the hinge point d between the backrest rod connecting section 120 and the rear support rod connecting section 420, and the hinge point f between the protrusion 430 and the connecting rod 700 are all in a locked state under the action of the locking mechanism, and the user can push the backrest rod 100 or move the front wheel 500 and the rear wheel 600 along the first direction X through the driving device installed on the wheelchair frame, so as to realize forward or backward movement.

[0082] When the wheelchair frame of this embodiment is converted from the unfolded state to the folded state, the folding can be achieved in two steps. In an optional embodiment, the first step is as shown in FIG. 4( b ), the locking mechanism can be unlocked, so that all hinge points are in the unlocked state, and the backrest rod 100 is folded toward the second end of the seat rod 200 around the hinge point a between the backrest rod body 110 and the seat rod connecting section 220, so that the first end of the backrest rod body 110 drives the backrest rod connecting section 120 and the rear support rod connecting section 420 to move along the first direction X toward the side away from the seat rod 200; based on the principle of the four-bar structure, while the backrest rod connecting section 120 and the rear support rod connecting section 420 rotate, the rear support rod body 410 is folded toward the second end of the seat rod 200 around the hinge point f between the protrusion 430 and the connecting rod 700, so that the backrest rod 100, the rear support rod 400 and the rear wheel 600 are stored together. In the second step, as shown in FIG. 4( c ), the front support rod 300 and the front wheel 500 can be folded toward the first end of the seat rod 200 around the hinge point b between the front support rod connecting section 320 and the seat rod body 210 , thereby storing the front support rod 300 and the front wheel 500 to form a structure as shown in FIG. 4( d ).

[0083] It should be noted that the above-mentioned embodiment is an optional embodiment and does not limit the order of folding the wheelchair frame; in other possible embodiments, the wheelchair frame can first fold the front support rod 300 and the front wheel 500, and then fold the backrest rod 100, the rear support rod 400 and the rear wheel 600.

[0084] The wheelchair frame of this embodiment can be folded in only two steps, thereby further simplifying the folding process of the wheelchair frame, improving the folding efficiency, and facilitating use by users.

[0085] Please continue to refer to Figure 5(a)-Figure 5(d) In another possible implementation, when the wheelchair frame of this embodiment is in the unfolded state, the first end of the backrest rod connecting section 120 is fixedly connected to the first end of the seat rod body 210, and the second end of the backrest rod connecting section 120 is hinged to the first end of the rear support rod 400.

[0086] The wheelchair frame also includes a main support rod 800, a first end of the main support rod 800 is hinged to a first end of the backrest rod body 110, a second end of the main support rod 800 is hinged to a middle portion of the front support rod body 310, and a specific hinge structure of the main support rod 800 and the backrest rod body 110 and the front support rod body 310 can be set as required. The backrest rod 100, the seat rod 200, the front support rod 300 and the main support rod 800 of this embodiment form a four-bar linkage.

[0087] As shown in Figure 5(a), the shape of the wheelchair frame of this embodiment in the unfolded state is basically consistent with the above-mentioned embodiment, that is, the seat rod 200 is arranged generally horizontally (along the first direction X), the backrest rod 100, the front support rod 300 and the rear support rod 400 are all inclined to the seat rod 200, and the backrest rod 100 and the front support rod 300 and the rear support rod 400 are respectively located on both sides of the seat rod 200 along the second direction Y. At this time, the hinge point a between the backrest rod body 110 and the seat rod connecting section 220, the hinge point b between the seat rod body 210 and the front support rod connecting section 320, the hinge point c between the front support rod body 310 and the main support rod 800, the hinge point d between the backrest rod connecting section 120 and the rear support rod 400, and the hinge point e between the backrest rod body 110 and the main support rod 800 are all in a locked state under the action of the locking mechanism. The user can push the backrest rod 100 or move the front wheel 500 and the rear wheel 600 along the first direction X through the driving device installed on the wheelchair frame, thereby achieving forward or backward movement.

[0088] When the wheelchair frame of this embodiment is converted from the unfolded state to the folded state, the folding can be achieved in two steps. In an optional embodiment, the first step is as shown in FIG. 5( b ), the locking mechanism can be unlocked, so that all hinge points are in the unlocked state, and the backrest rod 100 is folded toward the second end of the seat rod 200 around the hinge point a between the backrest rod body 110 and the seat rod connecting section 220, so that the first end of the backrest rod body 110 drives the main support rod 800 and the front support rod body 310 to move along the first direction X toward the side of the rear support rod 400; based on the principle of the four-bar structure, the movement of the main support rod 800 and the front support rod body 310 will simultaneously drive the front support rod body 310 to fold toward the first end of the seat rod 200 around the hinge point c between the front support rod body 310 and the main support rod 800, thereby storing the backrest rod 100, the front support rod 300 and the front wheel 500 together. In the second step, as shown in FIG5(c), the rear support rod 400 and the rear wheel 600 can be folded around the hinge point d between the rear support rod 400 and the backrest rod connecting section 120 toward the second end of the seat rod 200, so that the rear support rod 400 and the rear wheel 600 are stored to form a structure as shown in FIG5(d).

[0089] It should be noted that the above-mentioned embodiment is an optional embodiment and does not limit the order in which the wheelchair frame is folded; in other possible embodiments, the wheelchair frame can first fold the rear support rod 400 and the rear wheel 600, and then fold the backrest rod 100, the front support rod 300 and the front wheel 500.

[0090] The wheelchair frame of this embodiment can be folded in only two steps, thereby further simplifying the folding process of the wheelchair frame, improving the folding efficiency, and facilitating use by users.

[0091] Please continue to refer to Figure 6(a)-Figure 6(d)In another possible embodiment, the rear support rod 400 includes a rear support rod body 410 and a rear support rod connecting section 420. The rear support rod connecting section 420 is arranged obliquely to the rear support rod body 410, and the two generally form an "L" shape. In the unfolded state, the backrest rod connecting section 120 is located at the first end of the backrest rod body 110 and is arranged toward the side of the seat rod 200, and the rear support rod connecting section 420 is located at the first end of the rear support rod body 410 and is arranged toward the side of the seat rod 200. The end of the rear support rod connecting section 420 away from the rear support rod body 410 is hinged to the end of the backrest rod connecting section 120 away from the backrest rod body 110.

[0092] The wheelchair frame also includes a connecting rod 700 and a main support rod 800. A protrusion 430 is also provided on the rear support rod body 410. The first end of the connecting rod 700 is hinged to the protrusion 430, and the second end of the connecting rod 700 is hinged to the second end of the seat rod 200. The specific hinge structure of the connecting rod 700, the protrusion 430 and the seat rod 200 can be set as required. The first end of the main support rod 800 is hinged to the first end of the backrest rod body 110, and the second end of the main support rod 800 is hinged to the middle part of the front support rod body 310. The specific hinge structure of the main support rod 800, the backrest rod body 110 and the front support rod body 310 can be set as required. The backrest rod 100, the seat rod 200, the connecting rod 700 and the rear support rod 400 of this embodiment form a four-bar linkage; the backrest rod 100, the seat rod 200, the front support rod 300 and the main support rod 800 form another four-bar linkage.

[0093] As shown in FIG6(a), the shape of the wheelchair frame of this embodiment in the unfolded state is basically the same as that of the above-mentioned embodiment, that is, the seat rod 200 is arranged substantially horizontally (along the first direction X), the backrest rod 100, the front support rod 300 and the rear support rod 400 are all inclined to the seat rod 200, and the backrest rod 100 and the front support rod 300 and the rear support rod 400 are respectively located on both sides of the seat rod 200 along the second direction Y. In the unfolded state, each hinge is in a locked state under the action of the locking mechanism, and the user can push the backrest rod 100 or move the front wheel 500 and the rear wheel 600 along the first direction X through the driving device installed on the wheelchair frame, so as to realize forward or backward movement.

[0094] When the wheelchair frame of this embodiment is converted from the unfolded state to the folded state, it can be folded in just one step. Figure 6(b) and 6(c)As shown, the locking mechanism can be unlocked so that all hinge points are in the unlocked state, and the backrest rod 100 is folded toward the second end of the seat rod 200 around the hinge point between the backrest rod body 110 and the seat rod connecting section 220, so that the first end of the backrest rod body 110 drives the backrest rod connecting section 120, the rear support rod connecting section 420, the main support rod 800 and the front support rod body 310 to move along the first direction X toward the side away from the seat rod 200; based on the principle of the four-bar structure, the backrest rod connecting section 120, the rear support rod connecting section 420, the main support rod 800 and the front support rod body 310 are 20. The movement of the main support rod 800 and the front support rod body 310 will simultaneously drive the rear support rod body 410 to fold toward the second end of the seat rod 200 around the hinge point between the protrusion 430 and the connecting rod 700, and the front support rod body 310 to fold toward the first end of the seat rod 200 around the hinge point between the front support rod body 310 and the main support rod 800, so that the backrest rod 100, the front support rod 300 and the front wheel 500, and the rear support rod 400 and the rear wheel 600 can be stored together in one step, and finally present a state as shown in Figure 6 (d).

[0095] The wheelchair frame of this embodiment can be folded in one step, thereby further simplifying the folding process of the wheelchair frame, improving the folding efficiency, and facilitating the use of the user.

[0096] like Figure 2(d) , 3(e) , 4(d), 5(d), and 6(d), after folding, the front support rod 300 and the rear support rod 400 of this embodiment cross each other, so that the front support rod 300 and the front wheel 500 are close to the first end of the seat rod 200 in the first direction X, and the rear support rod 400 and the rear wheel 600 are close to the second end of the seat rod 200 in the first direction X. Preferably, in a plane perpendicular to the second direction Y, the front support rod 300, the front wheel 500, the rear support rod 400, and the rear wheel 600 are all located within the projection range of the seat rod 200, so as to ensure a smaller volume after folding.

[0097] After folding, in the first direction X, the distance L between the rear wheel 600 and the second end of the seat rod 200 is preferably within ±50 mm.

[0098] Furthermore, in the above embodiment, two backrest rods 100, seat rods 200, front support rods 300, rear support rods 400, connecting rods 700 and main support rods 800 are each provided. The two backrest rods 100, seat rods 200, front support rods 300, rear support rods 400, connecting rods 700 and main support rods 800 are respectively located on the left and right sides of the wheelchair frame, and correspond one to one along the third direction Z.

[0099] Optionally, the first end of the seat rod body 210 of the present embodiment can be fixedly connected to the seat rod connecting section 220 by fasteners such as screws, and the end of the seat rod connecting section 220 facing away from the seat rod body 210 is connected to the inner side of the backrest rod 100, that is, the two seat rod connecting sections 220 are located between the two backrest rods 100, which is beneficial to protect the hinge structure of the seat rod 200 and the backrest rod 100 from being easily damaged.

[0100] The two rear support rods 400 are also located between the two backrest rods 100 , which is helpful to protect the hinge structure between the rear support rods 400 and the backrest rods 100 from being damaged.

[0101] The end of the front support rod connecting section 320 facing away from the front support rod main body 310 can be provided with a mounting groove, and the two ends of the seat rod main body 210 are inserted into the mounting groove, and then the front support rod connecting section 320 and the seat rod main body 210 are hinged by using parts such as pins. The two front support rod main bodies 310 can be connected as a whole by a connecting rod, and both front support rod connecting sections 320 can be arranged on the connecting rod, which is beneficial to protect the hinge structure of the seat rod 200 and the front support rod 300 from being easily damaged.

[0102] The second ends of the two main support rods 800 are located between the two front support rods 300, so as to help protect the hinge structure between the main support rods 800 and the front support rods 300 from being easily damaged.

[0103] The connecting rod 700 is hinged to the pin connecting the front support rod connecting section 320 and the seat rod body 210, and the two connecting rods 700 are located between the two seat rods 200, which is beneficial to protect the hinge structure of the connecting rod 700 and the seat rod 200 from being easily damaged.

[0104] The two backrest rods 100 are located between the first ends of the two main support rods 800 , and the maximum width of the entire seat frame in the third direction Z is the distance between the two front support rod bodies 310 .

[0105] Furthermore, in order to facilitate the placement of the user's feet and improve the user's comfort when riding, this embodiment also provides a foot pedal 900 between the two front support rods 300, and the foot pedal 900 is hingedly connected to the two main support rods 800, so as to facilitate storage.

[0106] Specifically, the left and right sides of the footrest 900 are provided with connecting rod assemblies, and the two connecting rod assemblies are respectively hinged to the two main support rods 800. Optionally, the connecting rod assembly includes a first connecting rod 910 and a second connecting rod 920, the first end of the first connecting rod 910 is hinged to the middle of the main support rod 800, the second end of the first connecting rod 910 is hinged to the first end of the second connecting rod 920, and the second end of the second connecting rod 920 is hinged to the front support rod body 310 and the footrest 900. Please refer to Figures 6(a) and 6(b). When the wheelchair frame is folded and stored, the first end of the second connecting rod 920 and the second end of the first connecting rod 910 are folded and bent toward the inside of the wheelchair frame, so that the footrest 900 does not exceed the range of the front support rod 300 in the first direction X after being folded and stored, and the volume of the wheelchair frame after folding will not be increased due to the footrest 900.

[0107] This embodiment also provides a wheelchair, comprising the wheelchair frame of the above embodiment.

[0108] It is understandable that the wheelchair also includes structures such as a seat cushion and a backrest board configured on the wheelchair frame. Since the wheelchair frame of the above embodiment is adopted, the wheelchair of this embodiment has a smaller volume after folding, which is convenient for users to store and carry.

[0109] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0110] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0111] It should be noted that in the description of this application, the terms "first" and "second" are only used to facilitate the description of different components, and cannot be understood as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0112] The various embodiments or implementation methods in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0113] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A wheelchair frame, characterized in that: It comprises a backrest rod, a seat rod, a front support rod and a rear support rod; the first end of the seat rod is hinged to the backrest rod, the second end of the seat rod is hinged to the first end of the front support rod, the second end of the front support rod is used to connect the front wheel, the first end of the rear support rod is hinged to the first end of the backrest rod, and the second end of the rear support rod is used to connect the rear wheel; The wheelchair frame has a relative unfolded state and a folded state. In the unfolded state, the seat rod is horizontally arranged, the backrest rod, the front support rod and the rear support rod are all inclined to the seat rod, and the backrest rod and the front support rod and the rear support rod are respectively located on both sides of the seat rod; when the wheelchair frame is converted from the unfolded state to the folded state, the backrest rod is folded toward the second end of the seat rod around the hinge point between the backrest rod and the seat rod; the rear support rod and the rear wheel are folded toward the second end of the seat rod around the hinge point between the rear support rod and the backrest rod; the front support rod and the front wheel are folded toward the first end of the seat rod around the hinge point between the front support rod and the seat rod.

2. The wheelchair frame according to claim 1, characterized in that: The backrest rod comprises a backrest rod body and a backrest rod connecting section; The seat rod comprises a seat rod main body and a seat rod connecting section. In the unfolded state, the seat rod connecting section is located at a first end of the seat rod main body and is arranged away from the rear support rod. One end of the seat rod connecting section away from the seat rod main body is hinged to the middle part of the backrest rod main body. The front support rod comprises a front support rod body and a front support rod connecting section. In the unfolded state, the front support rod connecting section is located at the first end of the front support rod body and is arranged toward one side of the seat rod. The front support rod is hinged to the second end of the seat rod body through the front support rod connecting section. The first end of the rear support rod is hinged to the backrest rod connecting section.

3. The wheelchair frame according to claim 2, characterized in that: The rear support rod comprises a rear support rod body and a rear support rod connecting section. In the unfolded state, the backrest rod connecting section is located at the first end of the backrest rod body and is arranged toward one side of the seat rod. The rear support rod connecting section is located at the first end of the rear support rod body and is arranged toward one side of the seat rod. One end of the rear support rod connecting section facing away from the rear support rod body is hinged to one end of the backrest rod connecting section facing away from the backrest rod body. When the wheelchair frame is converted from the unfolded state to the folded state, the backrest rod is folded toward the second end of the seat rod around the hinge point of the backrest rod body and the seat rod connecting section, so that the first end of the backrest rod body drives the backrest rod connecting section and the rear support rod connecting section to move toward the side away from the seat rod; the rear support rod body is folded toward the second end of the seat rod around the hinge point of the backrest rod connecting section and the rear support rod connecting section; the front support rod and the front wheel are folded toward the first end of the seat rod around the hinge point of the front support rod connecting section and the seat rod body.

4. The wheelchair frame according to claim 2, characterized in that: The rear support rod comprises a rear support rod body and a rear support rod connecting section. In the unfolded state, the backrest rod connecting section is located at the first end of the backrest rod body and is arranged toward one side of the seat rod. The rear support rod connecting section is located at the first end of the rear support rod body and is arranged toward one side of the seat rod. One end of the rear support rod connecting section facing away from the rear support rod body is hinged to one end of the backrest rod connecting section facing away from the backrest rod body. It also includes a connecting rod, the rear support rod body is also provided with a protrusion, the first end of the connecting rod is hinged to the protrusion, and the second end of the connecting rod is hinged to the second end of the seat rod; When the wheelchair frame is converted from the unfolded state to the folded state, the backrest rod is folded toward the second end of the seat rod around the hinge point of the backrest rod body and the seat rod connecting section, so that the first end of the backrest rod body drives the backrest rod connecting section and the rear support rod connecting section to move toward the side away from the seat rod, and at the same time, the rear support rod body is folded toward the second end of the seat rod around the hinge point of the protrusion and the connecting rod; the front support rod and the front wheel are folded toward the first end of the seat rod around the hinge point of the front support rod connecting section and the seat rod body.

5. The wheelchair frame according to claim 2, characterized in that: In the unfolded state, the first end of the backrest rod connecting section is fixedly connected to the first end of the seat rod body, and the second end of the backrest rod connecting section is hinged to the first end of the rear support rod; It also includes a main support rod, a first end of the main support rod is hinged to the first end of the backrest rod body, and a second end of the main support rod is hinged to the middle part of the front support rod body; When the wheelchair frame is converted from the unfolded state to the folded state, the backrest rod is folded toward the second end of the seat rod around the hinge point of the backrest rod body and the seat rod connecting section, so that the first end of the backrest rod body drives the main support rod and the front support rod body to move toward the rear support rod side, and at the same time, the front support rod body is folded toward the first end of the seat rod around the hinge point of the front support rod body and the main support rod; the rear support rod and the rear wheel are folded toward the second end of the seat rod around the hinge point of the rear support rod and the backrest rod connecting section.

6. The wheelchair frame according to claim 2, characterized in that: The rear support rod comprises a rear support rod body and a rear support rod connecting section. In the unfolded state, the backrest rod connecting section is located at the first end of the backrest rod body and is arranged toward one side of the seat rod. The rear support rod connecting section is located at the first end of the rear support rod body and is arranged toward one side of the seat rod. One end of the rear support rod connecting section facing away from the rear support rod body is hinged to one end of the backrest rod connecting section facing away from the backrest rod body. It also includes a connecting rod and a main support rod, the rear support rod body is also provided with a protrusion, the first end of the connecting rod is hinged to the protrusion, and the second end of the connecting rod is hinged to the second end of the seat rod; the first end of the main support rod is hinged to the first end of the backrest rod body, and the second end of the main support rod is hinged to the middle part of the front support rod body; When the wheelchair frame is converted from the unfolded state to the folded state, the backrest rod is folded toward the second end of the seat rod around the hinge point of the backrest rod body and the seat rod connecting section, so that the first end of the backrest rod body drives the backrest rod connecting section, the rear support rod connecting section, the main support rod and the front support rod body to move toward the side away from the seat rod, and at the same time, the rear support rod body is folded toward the second end of the seat rod around the hinge point between the protrusion and the connecting rod, and the front support rod body is folded toward the first end of the seat rod around the hinge point between the front support rod body and the main support rod.

7. The wheelchair frame according to any one of claims 1 to 6, characterized in that: In the folded state, the length of the backrest rod, the length of the seat rod, the length of the front support rod and the front wheel, and the length of the rear support rod and the rear wheel are all equal.

8. The wheelchair frame according to claim 6, characterized in that: The backrest rod, seat rod, front support rod, rear support rod, connecting rod and main support rod are each provided with two, and the two backrest rods, seat rod, front support rod, rear support rod, connecting rod and main support rod are respectively located on the left and right sides of the wheelchair frame.

9. The wheelchair frame according to claim 8, characterized in that: The two rear support rods and the seat rod connecting section are both located between the two backrest rods, the two connecting rods are located between the two seat rods, the two backrest rods are located between the first ends of the two main support rods, and the second ends of the two main support rods are located between the two front support rods.

10. The wheelchair frame according to claim 9, characterized in that: A foot pedal is also provided between the two front support rods, and the foot pedal is hingedly connected to the two main support rods; A connecting rod assembly is provided on the left and right sides of the foot pedal, and the two connecting rod assemblies are respectively hinged to the two main support rods; the connecting rod assembly includes a first connecting rod and a second connecting rod, the first end of the first connecting rod is hinged to the middle part of the main support rod, the second end of the first connecting rod is hinged to the first end of the second connecting rod, and the second end of the second connecting rod is hinged to the front support rod body and the foot pedal.

11. A wheelchair, characterized in that: Comprising a wheelchair frame as described in any one of claims 1-10.

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