Folding wheelchair with brake self-locking function

Abstract

The utility model provides a folding wheelchair with a brake self-locking function, which relates to the technical field of wheelchair equipment and comprises a seat cushion frame, a backrest frame and a folding component, one end of the seat cushion frame is hinged with the folding component, and the other end of the seat cushion frame is hinged with the backrest frame; handle seats are inserted into the two ends of the backrest frame, brake wrenches are rotationally connected to the handle seats, fixing columns are arranged on the handle seats, first concave positions are formed in the brake wrenches, and the fixing columns and the first concave positions are used correspondingly; when one end of the brake wrench rotates downwards, the other end of the brake wrench rotates in the opposite direction, the first concave position is clamped to the fixing column, and automatic rotation reset of the brake wrench is limited. The wheelchair has the advantages that the handle seat is matched with the brake wrench, the wheelchair has the braking function and the self-locking function at the same time by changing the rotating direction of the brake wrench, the two states are freely switched, the structure is simple, use is convenient, the wheelchair is folded up and down, the occupied area of the wheelchair is reduced, and the folding efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelchair equipment, in particular to a folding wheelchair with a brake self-locking function. Background Art

[0002] Folding wheelchairs are a means of transportation for special groups of people, such as the disabled, the elderly and the weak, and patients undergoing medical clinical rehabilitation. They are widely used because they can be folded, are easy to carry, and take up little space. In order to stop the wheels from rotating while moving, a brake system is generally installed between the wheels and the front of the vehicle, and a brake handle is installed near the front of the vehicle, so that the operator can use the brake handle to control the brake pads in the brake system to clamp the wheel rim to achieve the braking purpose.

[0003] In the prior art, the Chinese patent document (Announcement No.: CN211356337U, Patent Name: A Multifunctional Wheelchair Handle) discloses in the technical scheme: "a handle body, the right side of the handle body is sleeved with a brake bracket, the brake bracket includes: a brake handle located on the left side below the brake bracket and hinged thereto, a steel sleeve limit seat on the right side below; a brake mechanism located on the right side, the brake mechanism includes: brake grips on both sides, a brake base at the bottom and a spring located between the brake grips and the brake base, the brake grips are hinged to the brake base; the handle body and the brake mechanism are hinged together. The locking steel cable is connected to the wheelchair structure, the left end of the locking steel cable is connected to the brake handle, the right end of the locking steel cable is provided with a steel cable limiting cap, and the right side of the locking steel cable is limited by the steel cable limiting cap after passing through the inside of the brake clamp; a steel cable sheath is sleeved on the outside of the locking steel cable, and steel sleeves are provided at both ends of the steel cable sheath, the steel sleeve on the left side is embedded in the steel sleeve limiting seat, and the steel sleeve on the right side abuts against the side of the brake clamp. "By pressing the brake handle on the handle body, the brake clamp clamps the wheel hub of the wheelchair to brake, and when the brake handle stops being pressed, the brake clamp pops open to release the braking state.

[0004] Combined with the description and drawings of the patent document, the shortcoming of the wheelchair handle design is that when the user needs to brake, he usually needs to hold the brake handle tightly to keep the vehicle body in a braked state. This method is not only troublesome, but also laborious and inconvenient to use. Utility Model Content

[0005] The utility model overcomes the shortcomings of the prior art and provides a folding wheelchair with a brake self-locking function. The folding wheelchair has both the brake and self-locking functions, and does not require the brake wrench to be held tightly all the time. The folding wheelchair is easy to operate and has a simple structure.

[0006] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0007] A folding wheelchair with a brake self-locking function comprises a seat cushion frame, a backrest frame and a folding assembly, wherein one end of the seat cushion frame is hinged to the folding assembly, and the other end of the seat cushion frame is hinged to the backrest frame; handle seats are inserted at both ends of the backrest frame, a brake wrench is rotatably connected to the handle seat, the handle seat is provided with a fixing column, the brake wrench is provided with a first recess, and the fixing column and the first recess are used correspondingly; when one end of the brake wrench rotates downward, the other end of the brake wrench rotates in the opposite direction, so that the first recess is clamped on the fixing column, thereby limiting the brake wrench from rotating and resetting by itself.

[0008] Furthermore, the brake wrench includes a first rotating support angle, which extends to one end to form a handle position, and extends upward to the other end to form a second rotating support angle, and the second rotating support angle extends toward the handle position to form a sliding position, and the first recessed position is arranged on the sliding position.

[0009] Furthermore, the handle seat includes a handle position, which is bent downward to form a accommodating position, which extends downward to form a first mounting position, a second mounting position is arranged on the side of the accommodating position, a first reinforcing rib is arranged on the outer wall of the accommodating position, a first dark pattern is arranged on the outer wall of the handle position, a second supporting position is arranged in the accommodating position, a fixing column is arranged on the side of the second supporting position, a first supporting position is arranged below the fixing column, a second rotating support angle is rotatably arranged on the second supporting position, and a first rotating support angle is rotatably arranged on the first supporting position.

[0010] Furthermore, a placement hole and a second recess are provided above the first rotating support angle, and a first slot is provided between the placement hole and the second recess; a second slot is provided below the second support position, the second slot is connected to a third slot, and a limiting hole is provided below the third slot, and the first slot, the second slot, the third slot and the limiting hole are connected.

[0011] Furthermore, a seat cushion is arranged above the seat cushion frame, an armrest is arranged above the seat cushion, the armrest is hinged on the backrest frame, the backrest frame is provided with a backrest, the backrest frame includes a horizontal tube and a vertical tube, the first installation position is plugged into the vertical tube, and the second installation position is plugged into the horizontal tube.

[0012] Furthermore, the folding assembly includes a front frame, a rear frame, a connecting frame, a pedal frame and a locking frame. The front end of the seat cushion frame at the upper end of the front frame is hinged, the lower end of the front frame is hinged to the front end of the connecting frame, the front end of the connecting frame is hinged to the pedal frame, the rear end of the connecting frame is hinged to the lower end of the vertical pipe, the front end of the locking frame is hinged to the rear end of the connecting frame, the rear end of the locking frame is rotatably connected to the rear end of the rear frame, and the front end of the rear frame is hinged to the upper end of the front frame.

[0013] Furthermore, a fixing rod is provided at the lower end of the vertical tube, a fixing assembly is provided at the fixing rod, a locking frame is provided with a locking assembly, a fixing assembly is provided with a clamping column, a locking plate is provided for rotational connection of the locking assembly, and the locking plate is provided with a clamping position. When the locking plate is rotated upward, the clamping position is clamped on the clamping column to limit the rotation of the locking frame relative to the fixed rod.

[0014] Furthermore, the locking assembly includes a first mounting seat, a locking plate is rotatably connected to a mounting column, the mounting column is arranged on the first mounting seat, the first mounting seat is arranged on the locking frame, the fixing assembly includes a second mounting seat, the clamping column is arranged on the second mounting seat, the second mounting seat is arranged in the middle of the fixing rod, connecting plugs are arranged on both sides of the first mounting seat, the middle part of the connecting plug-in is surrounded to form a recess, and the shape of the fixing rod matches the shape of the recess.

[0015] Furthermore, the mounting column is sleeved with a torsion spring, one end of which is arranged on the locking plate, and the other end of the torsion spring is against the first mounting seat, a footrest is arranged above the clamping position, the footrest is provided with a second dark pattern, and a plurality of second reinforcing ribs are arranged at the junction of the footrest and the clamping position.

[0016] Furthermore, a front wheel is connected to the lower part of the front frame, a rear wheel is arranged at the rear end of the rear frame, a brake member is arranged on the rear wheel, and the brake member is rotatably connected to the rear frame.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The handle base and the brake wrench cooperate with each other. By changing the rotation direction of the brake wrench, the wheelchair has both braking and self-locking functions. There is no need to hold the brake wrench tightly all the time, and the two states can be switched freely. The structure is simple and easy to use. The wheelchair adopts an up and down folding method, which not only reduces the area occupied by the wheelchair, but also effectively improves the folding efficiency. When it is necessary to ride, the wheelchair in the unfolded state can be locked by cooperating with the locking component and the fixing component, effectively preventing the user from having poor stability when riding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the unfolding of the folding wheelchair of the embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of a folding wheelchair according to an embodiment of the utility model;

[0022] Figure 3 The handlebar and brake wrench of the utility model are schematic diagrams. Figure 1 ;

[0023] Figure 4 The handlebar and brake wrench of the utility model are schematic diagrams. Figure 2 ;

[0024] Figure 5 This is a cross-sectional view of the handlebar seat and brake wrench of the utility model embodiment Figure 1 ;

[0025] Figure 6 This is a cross-sectional view of the handlebar seat and brake wrench of the utility model embodiment Figure 2 ;

[0026] Figure 7 This is a cross-sectional view of the handlebar seat and brake wrench of the utility model embodiment Figure 3 ;

[0027] Figure 8 It is a partial schematic diagram of a folding wheelchair according to an embodiment of the utility model;

[0028] Fig. 9 It is a schematic diagram of a locking frame and a locking assembly of an embodiment of the utility model;

[0029] Fig.10 It is a partial schematic diagram of the locking assembly of an embodiment of the utility model.

[0030] In the figure: 1-handle seat, 101-fixed column, 102-accommodation position, 1021-second support position, 1022-first support position, 1023-second slot, 1024-third slot, 1025-limiting hole, 1026-first reinforcing rib, 103-first installation position, 104-second installation position, 105-handle position, 1051-first dark pattern, 2-brake wrench, 201-first rotation support angle, 202-handle position, 203-second rotation support angle, 204-sliding position, 2041-first concave position, 205-placing hole, 206-second concave position, 207-first slot, 3-seat cushion frame, 4-backrest frame, 40 1- horizontal tube, 402- vertical tube, 5- folding assembly, 501- front frame, 502- rear frame, 503- locking frame, 504- connecting frame, 505- footrest frame, 6- fixing assembly, 601- clamping column, 602- second mounting seat, 7- locking assembly, 701- first mounting seat, 702- locking plate, 7021- clamping position, 7022- footrest position, 7023- second reinforcement rib, 7024- second dark pattern, 703- connecting plug-in, 7031- recessed position, 704- mounting column, 705- torsion spring, 8- seat cushion, 9- armrest, 10- backrest, 11- front wheel, 12- rear wheel, 13- brake part, 14- fixing rod. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0032] like Figures 1 to 7 As shown, a folding wheelchair with a brake self-locking function comprises a seat cushion frame 3, a backrest frame 4 and a folding assembly 5, one end of the seat cushion frame 3 is hinged to the folding assembly 5, and the other end of the seat cushion frame 3 is hinged to the backrest frame 4; handle seats 1 are inserted at both ends of the backrest frame 4, and a brake wrench 2 is rotatably connected to the handle seat 1, the handle seat 1 is provided with a fixing column 101, and the brake wrench 2 is provided with a first recess 2041, and the fixing column 101 and the first recess 2041 are used correspondingly; when one end of the brake wrench 2 is rotated downward, the other end of the brake wrench 2 is rotated in the opposite direction, so that the first recess 2041 is clamped on the fixing column 101, limiting the brake wrench 2 from rotating and resetting by itself. When the user needs to park the car, the first recess 2041 cooperates with the fixing column 101 to make the brake wrench 2 in a self-locking state, and there is no need to hold the brake wrench 2 tightly all the time. The structure is simple and easy to use.

[0033] Specifically, the brake wrench 2 includes a first rotating support angle 201, which extends to one end to form a handle position 202, and the first rotating support angle 201 extends upward to the other end to form a second rotating support angle 203, and the second rotating support angle 203 extends toward the handle position 202 to form a sliding position 204, and the first recessed position 2041 is arranged on the sliding position 204, and the handle seat 1 includes a handle position 105, and the handle position 105 is bent downward to form an accommodating position 102, and the accommodating position 102 extends downward to form a first mounting position 103, and a second mounting position 104 is arranged on the side of the accommodating position 102, and a second support position 1021 is arranged in the accommodating position 102, and the fixed column 101 is arranged on the side of the second support position 1021, and the first support position 1022 is arranged below the fixed column 101, and the second rotating support angle 203 is rotatably arranged on the second support position 1021, and the first rotating support angle 201 is rotatably arranged on the first support position 1022.

[0034] The folding assembly 5 includes a front frame 501, a rear frame 502, a connecting frame 504, a pedal frame 505 and a locking frame 503. The front end of the seat cushion frame 3 is hinged at the upper end of the front frame 501, the lower end of the front frame 501 is hinged to the front end of the connecting frame 504, the front end of the connecting frame 504 is hinged to the pedal frame 505, the rear end of the connecting frame 504 is hinged to the lower end of the vertical pipe 402, the front end of the locking frame 503 is hinged to the rear end of the connecting frame 504, and the rear end of the locking frame 503 is hinged to the rear frame 50 2, the rear end of the rear frame 502 is rotatably connected, the front end of the rear frame 502 is hinged to the upper end of the front frame 501, a seat cushion 8 is arranged above the seat cushion frame 3, an armrest 9 is arranged above the seat cushion 8, the armrest 9 is hinged to the backrest frame 4, the backrest frame 4 is provided with a backrest 10, the backrest frame 4 includes a transverse tube 401 and a vertical tube 402, the first installation position 103 is plugged into the vertical tube 402, and the second installation position 104 is plugged into the transverse tube 401, so as to fix the handlebar seat 1 on the backrest frame 4.

[0035] A placement hole 205 and a second recess 206 are provided above the first rotating support angle 201, and a first slot 207 is provided between the placement hole 205 and the second recess 206; a second slot 1023 is provided below the second support position 1021, the second slot 1023 is connected to the third slot 1024, and a limiting hole 1025 is provided below the third slot 1024. The first slot 207, the second slot 1023, the third slot 1024 and the limiting hole 1025 are connected to each other, and the placement hole 205 is used to install the round head end of the brake line, and the line end of the brake line passes through the first slot 207, the second slot 1023, the third slot 1024 and the limiting hole 1025 in sequence to extend outward.

[0036] A front wheel 11 is connected to the bottom of the front frame 501, and a rear wheel 12 is provided at the rear end of the rear frame 502. A brake component 13 is provided on the rear wheel 12. The brake component 13 is rotatably connected to the rear frame 502, and the end of the brake line is connected to the brake component 13. The brake line is driven by the rotation of the brake wrench 2, so that the brake line drives the brake component 13 to rotate, so that the brake component 13 is pressed against the rear wheel 12 to achieve a braking operation.

[0037] like Figure 5 As shown, when only braking is needed, the handle position 202 is rotated upward, and the second rotating support angle 203 uses the second support position 1021 as a fulcrum to rotate the first rotating support angle 201 in the opposite direction, and the brake operation is achieved by pulling the brake line through the brake wrench 2, such as Figure 6 As shown, when parking is required, the handle 202 only needs to be turned downward, and the first rotating support angle 201 takes the first supporting position 1022 as a fulcrum, so that the second rotating support angle 203 rotates in the opposite direction around the inner wall of the accommodation position 102, so that the first concave position 2041 is clamped on the fixing column 101, and the brake wrench 2 pulls the brake line to realize the self-locking operation, as shown in FIG. Figure 7As shown, when it is necessary to contact the self-locking state, just rotate the handle position 202 upward, and the first rotating support angle 201 uses the first support position 1022 as a fulcrum to allow the second rotating support angle 203 to rotate in the opposite direction around the inner wall of the accommodating position 102, so that the first recessed position 2041 and the fixed column 101 are disengaged from the clamping state, and the second rotating support angle 203 is pressed against the second support position 1021 to achieve the reset of the brake wrench 2.

[0038] The outer wall of the accommodating position 102 is provided with a first reinforcing rib 1026, which effectively enhances the strength of the accommodating position 102 and makes the structure of the handle seat 1 more stable. The outer wall of the handle position 105 is provided with a first dark pattern 1051, which increases friction and prevents slipping when the user touches it.

[0039] like Figures 1 to 10 As shown, a fixing rod 14 is provided at the lower end of the vertical tube 402, and a fixing component 6 is provided at the fixing rod 14. A locking frame 503 is provided with a locking component 7. The fixing component 6 is provided with a clamping column 601. The locking component 7 is rotatably connected to a locking piece 702, and the locking piece 702 is provided with a clamping position 7021. When the locking piece 702 is rotated upward, the clamping position 7021 is clamped on the clamping column 601, and the rotation of the locking frame 503 relative to the fixing rod 14 is restricted. The wheelchair in the unfolded state can be locked, and the user can effectively prevent the poor stability when riding. When the wheelchair is not in use, the locking component 7 is unlocked from the fixing component 6, and then the seat cushion frame 3, the backrest frame 4 and the folding component 5 can be folded up by means of a hinged connection. The wheelchair adopts an up and down folding method, which not only reduces the area occupied by the wheelchair, but also effectively improves the folding efficiency.

[0040] The locking assembly 7 includes a first mounting seat 701, a locking piece 702 is rotatably connected to a mounting column 704, the mounting column 704 is arranged on the first mounting seat 701, the first mounting seat 701 is arranged on the locking frame 503, the fixing assembly 6 includes a second mounting seat 602, the clamping column 601 is arranged on the second mounting seat 602, the second mounting seat 602 is arranged in the middle of the fixing rod 14, connecting plug-ins 703 are arranged on both sides of the first mounting seat 701, the middle part of the connecting plug-in 703 is surrounded to form a recessed position 7031, and the shape of the fixing rod 14 matches the shape of the recessed position 7031.

[0041] Figure 1 The wheelchair is in the unfolded state. When the wheelchair is in the unfolded state, the engaging position 7021 is engaged with the engaging column 601, and the concave position 7031 is wrapped and connected with the fixing rod 14. This double fixing method makes the wheelchair structure more solid.

[0042] Figure 2The wheelchair is in the folded state. The folding process of the wheelchair is as follows: the locking piece 702 is rotated downward to disengage the engaging position 7021 from the engaging column 601. The locking frame 503 is rotated counterclockwise relative to the rear frame 502, and the backrest frame 4 is pressed toward the seat cushion frame 3, driving the fixing rod 14 to move upward, so that the recessed position 7031 is separated from the fixing rod 14. The locking frame 503 rotates through the connecting frame 504 to drive the front frame 501 to rotate clockwise and gradually fold. When the front frame 501 is completely in contact with the ground, the front frame 501 is folded under the rear frame 502, and the footrest frame 505 is rotated upward relative to the connecting frame 504, and the backrest 10 is fitted with the seat cushion 8, which is convenient for storage and achieves the effect of saving space.

[0043] like Fig.10 As shown, the mounting post 704 is sleeved with a torsion spring 705, one end of the torsion spring 705 is arranged on the locking piece 702, and the other end of the torsion spring 705 is against the first mounting seat 701. The torsion spring 705 makes the locking piece 702 elastic. In the absence of external force, the engaging position 7021 and the engaging post 601 remain in an engaged state. When the locking piece 702 is rotated downward to disengage the engaging position 7021 from the engaging post 601, when the applied force disappears, the torsion spring 705 drives the locking piece 702 to return to its original position, thereby not affecting the folding of the wheelchair.

[0044] A footrest 7022 is provided above the engaging position 7021, and the footrest 7022 is provided with a second dark pattern 7024. The second dark pattern 7024 serves to increase friction. The locking piece 702 can be rotated by stepping on the footrest 7022 without slipping. A plurality of second reinforcing ribs 7023 are provided at the junction of the footrest 7022 and the engaging position 7021. The second reinforcing ribs 7023 effectively enhance the strength of the locking piece 702 and extend the service life of the locking piece 702.

[0045] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A folding wheelchair with a brake self-locking function, characterized in that: The utility model comprises a seat cushion frame (3), a backrest frame (4) and a folding assembly (5), wherein one end of the seat cushion frame (3) is hinged to the folding assembly (5), and the other end of the seat cushion frame (3) is hinged to the backrest frame (4); handle seats (1) are inserted at both ends of the backrest frame (4); a brake wrench (2) is rotatably connected to the handle seat (1); a fixing column (101) is provided on the handle seat (1); and a first recess (2041) is provided on the brake wrench (2); the fixing column (101) and the first recess (2041) are used correspondingly; when one end of the brake wrench (2) rotates downward, the other end of the brake wrench (2) rotates in the opposite direction, so that the first recess (2041) is clamped on the fixing column (101), thereby limiting the brake wrench (2) from rotating and resetting by itself.

2. A folding wheelchair with a brake self-locking function according to claim 1, characterized in that: The brake wrench (2) comprises a first rotating support angle (201), the first rotating support angle (201) extends toward one end to form a handle position (202), the first rotating support angle (201) extends upward toward the other end to form a second rotating support angle (203), the second rotating support angle (203) extends toward the handle position (202) to form a sliding position (204), and the first recessed position (2041) is arranged on the sliding position (204).

3. A folding wheelchair with a brake self-locking function according to claim 2, characterized in that: The handle seat (1) comprises a handle position (105), the handle position (105) is bent downward to form a receiving position (102), the receiving position (102) extends downward to form a first installation position (103), a second installation position (104) is arranged on the side of the receiving position (102), a first reinforcing rib (1026) is arranged on the outer wall of the receiving position (102), a first dark pattern (1051) is arranged on the outer wall of the handle position (105), a second support position (1021) is arranged in the receiving position (102), a fixed column (101) is arranged on the side of the second support position (1021), a first support position (1022) is arranged below the fixed column (101), a second rotation support angle (203) is rotatably arranged on the second support position (1021), and a first rotation support angle (201) is rotatably arranged on the first support position (1022).

4. A folding wheelchair with a brake self-locking function according to claim 3, characterized in that: A placement hole (205) and a second recess (206) are provided above the first rotation support angle (201), and a first slot (207) is provided between the placement hole (205) and the second recess (206); a second slot (1023) is provided below the second support position (1021), the second slot (1023) is connected to a third slot (1024), a limiting hole (1025) is provided below the third slot (1024), and the first slot (207), the second slot (1023), the third slot (1024) and the limiting hole (1025) are connected.

5. The folding wheelchair with brake self-locking function according to claim 3, characterized in that: A seat cushion (8) is arranged above the seat cushion frame (3), an armrest (9) is arranged above the seat cushion (8), the armrest (9) is hinged on the backrest frame (4), the backrest frame (4) is provided with a backrest (10), the backrest frame (4) comprises a transverse tube (401) and a vertical tube (402), the first installation position (103) is plugged into the vertical tube (402), and the second installation position (104) is plugged into the transverse tube (401).

6. A folding wheelchair with a brake self-locking function according to claim 1, characterized in that: The folding assembly (5) comprises a front frame (501), a rear frame (502), a connecting frame (504), a pedal frame (505) and a locking frame (503); the front end of the seat cushion frame (3) at the upper end of the front frame (501) is hinged; the lower end of the front frame (501) is hinged to the front end of the connecting frame (504); the front end of the connecting frame (504) is hinged to the pedal frame (505); the rear end of the connecting frame (504) is hinged to the lower end of the vertical pipe (402); the front end of the locking frame (503) is hinged to the rear end of the connecting frame (504); the rear end of the locking frame (503) is rotatably connected to the rear end of the rear frame (502); and the front end of the rear frame (502) is hinged to the upper end of the front frame (501).

7. A folding wheelchair with a brake self-locking function according to claim 6, characterized in that: The lower end of the vertical tube (402) is provided with a fixing rod (14), the fixing rod (14) is provided with a fixing assembly (6), the locking frame (503) is provided with a locking assembly (7), the fixing assembly (6) is provided with a clamping column (601), the locking assembly (7) is rotatably connected with a locking piece (702), the locking piece (702) is provided with a clamping position (7021), when the locking piece (702) rotates upward, the clamping position (7021) is clamped on the clamping column (601), thereby limiting the rotation of the locking frame (503) relative to the fixing rod (14).

8. A folding wheelchair with a brake self-locking function according to claim 7, characterized in that: The locking assembly (7) comprises a first mounting seat (701), a locking piece (702) being rotatably connected to a mounting column (704), the mounting column (704) being arranged on the first mounting seat (701), the first mounting seat (701) being arranged on a locking frame (503), the fixing assembly (6) comprising a second mounting seat (602), the clamping column (601) being arranged on the second mounting seat (602), the second mounting seat (602) being arranged in the middle of a fixing rod (14), connecting plug-ins (703) being arranged on both sides of the first mounting seat (701), the middle of the connecting plug-in (703) being surrounded to form a recess (7031), and the shape of the fixing rod (14) matches the shape of the recess (7031).

9. A folding wheelchair with a brake self-locking function according to claim 8, characterized in that: The mounting column (704) is sleeved with a torsion spring (705), one end of the torsion spring (705) is arranged on the locking plate (702), and the other end of the torsion spring (705) is against the first mounting seat (701). A footrest position (7022) is arranged above the clamping position (7021), and the footrest position (7022) is provided with a second dark pattern (7024). A plurality of second reinforcing ribs (7023) are arranged at the junction of the footrest position (7022) and the clamping position (7021).

10. A folding wheelchair with a brake self-locking function according to claim 9, characterized in that: A front wheel (11) is connected to the lower part of the front frame (501), a rear wheel (12) is arranged at the rear end of the rear frame (502), a brake component (13) is arranged on the rear wheel (12), and the brake component (13) is rotatably connected to the rear frame (502).

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