Wheelchair frame hinge folding device

Abstract

The utility model discloses a wheelchair frame hinge folding device which comprises a left rear frame, a left frame hinge connecting device, a left front frame and a left locking and unlocking device. The left locking and unlocking device comprises a left fixed connecting part, a left first hinge shaft, a left second hinge shaft, a left overturning locking and unlocking part, a left lock catch part and a left hook part; the left fixed connecting part is fixedly connected to the rear part of the left front frame; the left fixed connecting part is movably connected with the front end of the left overturning locking and unlocking part by vertically penetrating through a left first hinge shaft; the rear section of the leftward turning locking and unlocking component is a handle section; the middle part of the left overturning locking and unlocking part is movably connected with the front end of the left lock catch part by vertically penetrating through a left second hinge shaft; a left locking hook is arranged at the tail part of the left lock catch part; the front part of the left rear frame is fixedly connected with a left hook component; the left locking and unlocking device is reasonable in structural arrangement, simple in structure, easy to lock and unlock, easy to produce and assemble, and firm and stable in locking.

Description

Technical Field

[0001] This utility model relates to a frame device for a folding wheelchair, and more particularly to a wheelchair frame hinge folding device. Background Technology

[0002] The locking and unlocking mechanisms of existing similar folding wheelchair frames have complex structures, poor fit, are inconvenient to operate, have low assembly efficiency, and low production costs. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a wheelchair frame hinged folding device with reasonable structural design, simple structure, easy locking and unlocking operation, easy production, easy assembly, and firm and stable locking.

[0004] The solution to the above technical problem is as follows:

[0005] A wheelchair frame articulation and folding device includes a left rear frame, a left frame articulation connection device, a left front frame, and a left locking and unlocking device. The front part of the left rear frame is connected to the left frame articulation connection device, and the left frame articulation connection device is connected to the rear part of the left front frame. The left front frame can be folded outwards from the left rear frame via the left frame articulation connection device. The left locking and unlocking device is connected between the front part of the left rear frame and the rear part of the left front frame.

[0006] The left locking and unlocking device includes a left fixed connecting component, a left first hinge shaft, a left second hinge shaft, a left flip locking and unlocking component, a left latch component, and a left hook component;

[0007] The left fixed connection component is fixedly connected to the rear of the left front frame;

[0008] The front end of the left fixed connecting component and the left flip-locking unlocking component are movably connected by a vertically penetrating left first hinge axis; the rear section of the left flip-locking unlocking component is a means;

[0009] The middle part of the left flip-locking and unlocking component is movably connected to the front end of the left latch component through a vertical left second hinge axis; the tail of the left latch component is provided with a left locking hook;

[0010] The left hook component is fixedly connected to the front of the left rear frame;

[0011] The left-flip locking and unlocking component is used to lock and unlock the left latch component; when the left locking hook of the left latch component is engaged with the left hook component, it is locked; when the left locking hook of the left latch component is disengaged from the left hook component, it is unlocked.

[0012] The advantages of this utility model of a wheelchair frame hinged folding device are as follows: the left locking and unlocking device of this product has a reasonable structure, simple structure, easy locking and unlocking operation, easy production, easy assembly, low production cost, and strong and stable locking. Attached Figure Description

[0013] Figure 1 , Figure 2 This is a perspective view of the wheelchair's left side frame in its unfolded state.

[0014] Figure 3 , Figure 4 This is a perspective view of the left side frame of the wheelchair of this utility model in a folded state;

[0015] Figure 5 , Figure 6 This is an exploded view of the left side frame of the wheelchair, the left frame hinge connection device, and the left locking and unlocking device of the present utility model.

[0016] Figure 7 , Figure 8 This is an exploded view of the left frame hinge connection device of this utility model product;

[0017] Figure 9 , Figure 10 This is an exploded view of the left locking and unlocking device of this utility model product;

[0018] Figure 11 , Figure 12 This is a perspective view of the right side frame of the wheelchair of this utility model in its unfolded state;

[0019] Figure 13 , Figure 14 This is a perspective view of the right side frame of the wheelchair of this utility model in a folded state;

[0020] Figure 15 , Figure 16 This is an exploded view of the right side frame of the wheelchair, the right frame hinge connection device, and the right locking and unlocking device of the present utility model.

[0021] Figure 17 , Figure 18 This is an exploded view of the right frame hinge connection device of this utility model product;

[0022] Figure 19 , Figure 20 This is an exploded view of the right locking and unlocking device of this utility model product;

[0023] Figure 21 This is a perspective view of the wheelchair frame of this utility model.

[0024] Figure 22 , Figure 23 , Figure 24This is a perspective view of the wheelchair of this utility model in its unfolded state;

[0025] Figure 25 This is a perspective view of the wheelchair of this utility model in its folded state.

[0026] Left rear frame 1A, left rear frame rear vertical bar 1A1, left rear frame upper horizontal bar 1A2, left rear frame lower horizontal bar 1A3, left rear frame front vertical bar 1A4, left frame hinge connection device 1B, first upper left hinge connector 1BA, second upper left hinge connector 1BB, first upper left hinge shaft 1BC, first lower left hinge connector 1BD, second lower left hinge connector 1BE, first lower left hinge shaft 1BF, first upper left hinge interface 1BG, first upper left shaft hole 1BH, upper left hinge protrusion 1BI, second upper left shaft hole 1BJ, first lower left hinge interface 1BK, first lower left shaft hole 1BL, lower left hinge protrusion Component 1BM, second lower left axle hole 1BN, left front frame 1C, left front frame rear vertical bar 1C1, left front frame upper crossbar 1C2, left front frame lower crossbar 1C3, left front frame front vertical bar 1C4, left locking and unlocking device 1D, left fixed connecting component 41, left fixed connecting protrusion 411, left protrusion axle hole 412, left first hinge shaft 42, left second hinge shaft 43, left flip locking and unlocking component 44, left U-shaped fork 441, left upper support lug 442, left lower support lug 443, left first support lug hole 444, left second support lug hole 445, left latch component 45, left first latch axle hole 450, left locking hook 451, left hook component 46. Right rear frame 2A, right rear frame rear vertical bar 2A1, right rear frame upper crossbar 2A2, right rear frame lower crossbar 2A3, right rear frame front vertical bar 2A4, right frame hinge connection device 2B, first upper right hinge connector 2BA, second upper right hinge connector 2BB, first upper right hinge shaft 2BC, first lower right hinge connector 2BD, second lower right hinge connector 2BE, first lower right hinge shaft 2BF, first upper right hinge interface 2BG, first upper right shaft hole 2BH, upper right hinge protrusion 2BI, second upper right shaft hole 2BJ, first lower right hinge interface 2BK, first lower right shaft hole 2BL, lower right hinge protrusion Component 2BM, second lower right shaft hole 2BN, right front frame 2C, right front frame rear vertical bar 2C1, right front frame upper crossbar 2C2, right front frame lower crossbar 2C3, right front frame front vertical bar 2C4, right locking and unlocking device 2D, right fixed connection component 51, right fixed connection protrusion 511, right protrusion shaft hole 512, right first hinge shaft 52, right second hinge shaft 53, right flip locking and unlocking component 54, right U-shaped fork 541, right upper support lug 542, right lower support lug 543, right first support lug hole 544, right second support lug hole 545, right latch component 55, right first latch shaft hole 550, right locking hook 551, right hook component 56. Detailed Implementation

[0027] like Figures 1 to 25 As shown:

[0028] A wheelchair frame articulation and folding device includes a left rear frame 1A, a left frame articulation connection device 1B, a left front frame 1C, and a left locking and unlocking device 1D. A left rear caster is fixedly installed at the rear bottom of the left rear frame 1A; a left front caster is fixedly installed at the front bottom of the left front frame 1C; the left rear frame 1A and the left front frame 1C constitute the left side frame of the wheelchair; the front part of the left rear frame 1A is connected to the left frame articulation connection device 1B, and the left frame articulation connection device 1B is connected to the rear part of the left front frame 1C. The left front frame 1C can be folded outwards from the left rear frame 1A via the left frame articulation connection device 1B, thereby compressing the length of the left side frame of the wheelchair and reducing packaging space; the left rear frame 1A is entirely... The design of the left frame hinge connection device 1B is intended to allow the left side frame of the wheelchair to be folded and rotated in sections, with a circumferential folding motion. A left locking and unlocking device 1D is connected between the front part of the left rear frame 1A and the rear part of the left front frame 1C. When folding is required, the left locking and unlocking device 1D is opened, allowing the left front frame 1C to be folded and rotated relative to the outside of the left rear frame 1A, also in a horizontal circumferential folding motion, so that the left front frame 1C and the left rear frame 1A are stacked together after being folded. When the left side frame of the wheelchair needs to be unfolded and fixed for use, the folded left front frame 1C is unfolded and opened, so that the left front frame 1C and the left rear frame 1A are aligned on the same axis, and then the left locking and unlocking device 1D is locked and fixed.

[0029] The main technical improvement of this product is that the left locking and unlocking device 1D includes a left fixed connecting component 41, a left first hinge shaft 42, a left second hinge shaft 43, a left flip locking and unlocking component 44, a left latch component 45, and a left hook component 46; the left fixed connecting component 41, the left first hinge shaft 42, the left second hinge shaft 43, the left flip locking and unlocking component 44, the left latch component 45, and the left hook component 46 are made of metal, such as aluminum, iron, or steel.

[0030] The left fixed connection component 41 is fixedly connected to the rear of the left front frame 1C by screws or welding, preferably fixedly connected to the inner rear wall of the left front frame 1C, without protruding outwards, which is better for use;

[0031] The front end of the left fixed connecting component 41 and the left flip locking and unlocking component 44 are movably connected by a vertically penetrating left first hinge shaft 42, which is a screw or bolt assembly; the rear section of the left flip locking and unlocking component 44 is a handle for human hand gripping.

[0032] The middle part of the left flip-locking and unlocking component 44 and the front end of the left latch component 45 are movably connected by a vertically penetrating left second hinge shaft 43, which is a screw or bolt assembly; the tail of the left latch component 45 is provided with a left locking hook 451; the left latch component 45 is arc-shaped.

[0033] The front part of the left rear frame 1A is fixedly connected to the left hook component 46 by screws or welding. It is preferred to fix it to the inner front wall of the left rear frame 1A without protruding outwards, which is better for use.

[0034] The left-flipping locking and unlocking component 44 is used to lock and unlock the left latch component 45; when the left locking hook 451 of the left latch component 45 is hooked onto the left hook component 46, it is locked; when the left locking hook 451 of the left latch component 45 is disengaged from the left hook component 46, it is unlocked.

[0035] Locking process: First, flip the left flip-lock unlocking component 44 from front to back. The left flip-lock unlocking component 44 and the left latch component 45 are in the unlocked and loose state. Then, flip open the folded left front frame 1C so that the left front frame 1C and the left rear frame 1A are aligned on the same axis. Then, use your hand to engage the left locking hook 451 of the left latch component 45 with the left hook component 46 for pre-tightening. Then, hold the handle of the rear section of the left flip-lock unlocking component 44 firmly and flip the left flip-lock unlocking component 44 from back to front. Pull the left latch component 45 back a little. After the left flip-lock unlocking component 44 is flipped flat and in place, it is fixed and does not move. The left flip-lock unlocking component 44 is tightened and does not move, so that the left locking hook 451 and the left hook component 46 can engage and lock firmly and stably. The left front frame 1C can no longer be opened.

[0036] Unlocking process:

[0037] With the device in the locked state, hold the handle at the rear of the left flip-lock unlocking part 44 and flip it from front to back. The left flip-lock unlocking part 44 will unlock first, and the left locking part 45 will unlock simultaneously. Then, flip the left locking part 45 outward by hand, and the left locking hook 451 will disengage from the left hook part 46. At this time, the left front frame 1C can be flipped and folded relative to the outside of the left rear frame 1A.

[0038] The aforementioned left locking and unlocking device has a reasonable 1D structure, simple structure, easy locking and unlocking operation, easy production, easy assembly, and a firm and stable locking mechanism.

[0039] Further, in the preferred technical solution: the front section of the left-flipping locking and unlocking component 44 is provided with an axial left U-shaped fork 441, which causes the front section of the left-flipping locking and unlocking component 44 to form a left upper support ear 442 and a left lower support ear 443; the front ends of the left upper support ear 442 and the left lower support ear 443 are vertically provided with a left first support ear hole 444, and the roots of the left upper support ear 442 and the left lower support ear 443 are vertically provided with a left second support ear hole 445; the left fixed connecting component 41 integrally extends a left fixed connecting protrusion 411, which is part of the left fixed connecting component 41. The left fixed connecting protrusion 411 has a vertically formed left protrusion shaft hole 412. The left fixed connecting protrusion 411 is inserted into the front end of the left U-shaped fork 441, which fits perfectly. The left first support ear hole 444 and the left protrusion shaft hole 412 jointly pass through the left first hinge shaft 42, so that the left flip-lock unlocking component 44 and the left fixed connecting protrusion 411 form a movable connection. This also makes it possible to form a movable connection between the left flip-lock unlocking component 44 and the left fixed connecting protrusion 411. This is to set a suitable movable connection structure between the left flip-lock unlocking component 44 and the left fixed connecting protrusion 411, which has good flexibility, reasonable design, easy flipping and movement, easy operation, and is not easy to loosen.

[0040] The front end of the left locking component 45 is vertically provided with a left first locking shaft hole 450; the front end of the left locking component 45 is inserted into the root of the left U-shaped fork 441, which fits perfectly. The left second support ear hole 445 and the left first locking shaft hole 450 jointly pass through the left second hinge shaft 43, so that the left flip-locking unlocking component 44 and the left locking component 45 form a movable connection; this is to set a suitable movable connection structure between the left flip-locking unlocking component 44 and the left locking component 45, which has good flexibility, reasonable design, easy flipping and movement, easy operation, and is not easy to loosen;

[0041] Further, in the preferred technical solution: the left rear frame 1A includes a left rear frame rear vertical bar 1A1, a left rear frame upper horizontal bar 1A2, a left rear frame lower horizontal bar 1A3, and a left rear frame front vertical bar 1A4. The rear ends of the left rear frame upper horizontal bar 1A2 and the left rear frame lower horizontal bar 1A3 are welded and fixedly connected to the left rear frame rear vertical bar 1A1. The left rear frame upper horizontal bar 1A2 and the front part of the left rear frame lower horizontal bar 1A3 are welded and fixedly connected to the left rear frame front vertical bar 1A4. The left rear frame 1A is made of aluminum and is lightweight. The aforementioned left rear frame 1A is a frame structure with good sturdiness. A suitable left rear frame 1A structure is provided.

[0042] The left front frame 1C includes a left front frame rear vertical bar 1C1, a left front frame upper horizontal bar 1C2, a left front frame lower horizontal bar 1C3, and a left front frame front vertical bar 1C4. The left front frame upper horizontal bar 1C2 is integrally formed by bending and extending the top of the left front frame front vertical bar 1C4. The front end of the left front frame lower horizontal bar 1C3 is welded and fixedly connected to the left front frame front vertical bar 1C4. The left front frame rear vertical bar 1C1 is welded and fixedly connected between the left front frame upper horizontal bar 1C2 and the left front frame lower horizontal bar 1C3. The left front frame 1C is made of aluminum and is lightweight. The left front frame 1C is a frame structure with good sturdiness.

[0043] The left hook component 46 is welded or fixed to the inner wall of the middle section of the left rear frame front vertical rod 1A4; the left fixed connection component 41 is welded or fixed to the inner wall of the middle section of the left front frame rear vertical rod 1C1; the left hook component 46 and the left fixed connection component 41 are set at the same height.

[0044] The left frame hinge connection device 1B is connected between the upper crossbar 1A2 of the left rear frame and the upper crossbar 1C2 of the left front frame, and between the lower crossbar 1A3 of the left rear frame and the lower crossbar 1C3 of the left front frame.

[0045] Further, in the preferred technical solution: the left rear frame 1A is made of flat aluminum tubing; the left rear frame rear vertical bar 1A1, left rear frame upper horizontal bar 1A2, left rear frame lower horizontal bar 1A3, and left rear frame front vertical bar 1A4 are made of flat aluminum tubing; the left front frame 1C is made of flat aluminum tubing; the left front frame rear vertical bar 1C1, left front frame upper horizontal bar 1C2, left front frame lower horizontal bar 1C3, and left front frame front vertical bar 1C4 are made of flat aluminum tubing;

[0046] The left frame articulation connection device 1B includes a first upper left articulation connector 1BA, a second upper left articulation connector 1BB, a first upper left articulation shaft 1BC, a first lower left articulation connector 1BD, a second lower left articulation connector 1BE, and a first lower left articulation shaft 1BF.

[0047] The first upper left hinge connector 1BA extends outward with two supporting ears, and a first upper left hinge interface 1BG is formed between the two supporting ears. The two supporting ears are vertically provided with a first upper left shaft hole 1BH.

[0048] The second upper left hinge connector 1BB extends outward to form an upper left hinge protrusion 1BI. The upper left hinge protrusion 1BI has a vertically formed second upper left shaft hole 1BJ, which fits perfectly into the first upper left hinge interface 1BG. The first upper left shaft hole 1BH and the second common upper left shaft hole are vertically connected to the first upper left hinge shaft 1BC, forming a movable hinge connection between the first upper left hinge connector 1BA and the second upper left hinge connector 1BB. The connector of the first upper left hinge connector 1BA is inserted into the cross-sectional tube hole of the corresponding left rear frame upper crossbar 1A2 and is welded or fixed horizontally with screws to prevent detachment. The connector of the second upper left hinge connector 1BB is inserted into the cross-sectional tube hole of the corresponding left front frame upper crossbar 1C2 and is welded or fixed horizontally with screws to prevent detachment.

[0049] The first lower left hinge connector 1BD extends outward with two lugs, and a first lower left hinge interface 1BK is formed between the two lugs. The two lugs are vertically provided with a first lower left shaft hole 1BL.

[0050] The second lower left hinge connector 1BE extends outward to form a lower left hinge protrusion 1BM. The lower left hinge protrusion 1BM has a vertically formed second lower left shaft hole 1BN, which is perfectly suited for insertion into the first lower left hinge interface 1BK. The first lower left shaft hole 1BL and the second common lower left shaft hole are vertically connected to the first lower left hinge shaft 1BF, forming a movable hinge connection between the first lower left hinge connector 1BD and the second lower left hinge connector 1BE. The connector of the first lower left hinge connector 1BD is inserted into the cross-sectional tube hole of the corresponding lower crossbar 1A3 of the left rear frame and is welded or fixed horizontally with screws to prevent detachment. The connector of the second lower left hinge connector 1BE is inserted into the cross-sectional tube hole of the corresponding lower crossbar 1C3 of the left front frame and is welded or fixed horizontally with screws to prevent detachment.

[0051] The left front frame 1C is based on the first upper left hinge shaft 1BC and the first lower left hinge shaft 1BF. The left front frame 1C, the second upper left hinge connector 1BB, and the second lower left hinge connector 1BE are simultaneously flipped and folded outward relative to the left rear frame 1A.

[0052] Further, in a preferred technical solution: a wheelchair frame articulated folding device further includes a right rear frame 2A, a right frame articulation connection device 2B, a right front frame 2C, and a right locking / unlocking device 2D; a right rear caster is fixedly installed at the rear bottom of the right rear frame 2A; a right front caster is fixedly installed at the front bottom of the right front frame 2C; the right rear frame 2A and the right front frame 2C constitute the right side frame of the wheelchair; the front part of the right rear frame 2A is connected to the right frame articulation connection device 2B, and the right frame articulation connection device 2B is connected to the rear part of the right front frame 2C; the right front frame 2C can be folded outwards from the right rear frame 2A via the right frame articulation connection device 2B, thereby compressing the length of the right side frame of the wheelchair and reducing packaging space; the right rear frame... The frame 2A is flat overall. The purpose of the right frame hinge connection device 2B is to allow the right side frame of the wheelchair to be folded and flipped in sections, and to fold in a circumferential manner. A right locking and unlocking device 2D is connected between the front part of the right rear frame 2A and the rear part of the right front frame 2C. When folding is required, the right locking and unlocking device 2D is opened, allowing the right front frame 2C to be flipped and folded relative to the outside of the right rear frame 2A. This is also a horizontal circumferential flip, so that the right front frame 2C and the right rear frame 2A are stacked together after flipping. When the right side frame of the wheelchair needs to be unfolded and fixed for use, the folded right front frame 2C is flipped open, so that the right front frame 2C and the right rear frame 2A are aligned on the same axis. Then, the right locking and unlocking device 2D is locked and fixed.

[0053] The main technical improvement of this product is that the right locking and unlocking device 2D includes a right fixed connecting component 51, a right first hinge shaft 52, a right second hinge shaft 53, a right flip locking and unlocking component 54, a right latch component 55, and a right hook component 56; the right fixed connecting component 51, the right first hinge shaft 52, the right second hinge shaft 53, the right flip locking and unlocking component 54, the right latch component 55, and the right hook component 56 are made of metal, such as aluminum, iron, or steel.

[0054] The right fixed connection component 51 is fixedly connected to the rear of the right front frame 2C by screws or welding. It is preferred to be fixedly connected to the inner rear wall of the right front frame 2C, without protruding outwards, which is better for use.

[0055] The front end of the right fixed connection component 51 and the right flip-lock unlock component 54 are movably connected by a vertically penetrating right first hinge shaft 52, which is a screw or bolt assembly; the rear end of the right flip-lock unlock component 54 is a handle for human hand gripping.

[0056] The middle part of the right flip-locking and unlocking component 54 and the front end of the right latch component 55 are movably connected by a vertically penetrating right second hinge shaft 53, which is a screw or bolt assembly; the tail of the right latch component 55 is provided with a right locking hook 551; the right latch component 55 is arc-shaped.

[0057] The front part of the right rear frame 2A is fixedly connected to the right hook component 56 by screws or welding. It is preferred to fix it to the inner front wall of the right rear frame 2A without protruding outwards, which is better for use.

[0058] The right-flip locking and unlocking component 54 is used to lock and unlock the right latch component 55; when the right locking hook 551 of the right latch component 55 is hooked onto the right hook component 56, it is locked; when the right locking hook 551 of the right latch component 55 is disengaged from the right hook component 56, it is unlocked.

[0059] Locking process: First, flip the right-flip locking and unlocking component 54 from front to back. The right-flip locking and unlocking component 54 and the right-locking component 55 are in the unlocked and loose state. Then, flip the folded right front frame 2C open so that the right front frame 2C and the right rear frame 2A are aligned on the same axis. Then, use your hand to engage the right locking hook 551 of the right-locking component 55 with the right hook component 56 for pre-tightening. Then, hold the handle of the rear section of the right-flip locking and unlocking component 54 firmly and flip the right-flip locking and unlocking component 54 from back to front. Pull the right-locking component 55 back a little. After the right-flip locking and unlocking component 54 is flipped flat and in place, it is fixed and does not move. The right-flip locking and unlocking component 54 is tightened and does not move, so that the right locking hook 551 and the right hook component 56 can engage and lock firmly and stably. The right front frame 2C can no longer be opened.

[0060] Unlocking process:

[0061] With the device in the locked position, hold the handle at the rear of the right-flip locking and unlocking part 54 and flip it from front to back. The right-flip locking and unlocking part 54 will unlock first, and the right locking part 55 will unlock simultaneously. Then, flip the right locking part 55 outward by hand, and the right locking hook 551 will disengage from the right hook part 56. At this time, the right front frame 2C can be flipped and folded relative to the outside of the right rear frame 2A.

[0062] The aforementioned right-side locking and unlocking device has a reasonable 2D structure, simple structure, easy locking and unlocking operations, is easy to manufacture and assemble, and has a firm and stable locking mechanism.

[0063] Further, in the preferred technical solution: the front section of the right flip-locking unlocking component 54 has an axial right U-shaped fork 541, which forms a right upper support ear 542 and a right lower support ear 543 on the front section of the right flip-locking unlocking component 54; the front ends of the right upper support ear 542 and the right lower support ear 543 are vertically formed with a right first support ear hole 544, and the roots of the right upper support ear 542 and the right lower support ear 543 are vertically formed with a right second support ear hole 545; the right fixed connecting component 51 integrally extends a right fixed connecting protrusion 511, which is part of the right fixed connecting component 51. The right fixed connecting protrusion 511 has a vertically formed right protrusion shaft hole 512. The right fixed connecting protrusion 511 is inserted into the front end of the right U-shaped fork 541, which fits perfectly. The right first support ear hole 544 and the right protrusion shaft hole 512 jointly pass through the right first hinge shaft 52, so that the right flip-lock unlocking component 54 and the right fixed connecting protrusion 511 form a movable connection. This also makes it possible to form a movable connection between the right flip-lock unlocking component 54 and the right fixed connecting component 511. This is to set a suitable movable connection structure between the right flip-lock unlocking component 54 and the right fixed connecting protrusion 511, which has good flexibility, reasonable design, easy flipping and movement, easy operation, and is not easy to loosen.

[0064] The front end of the right latch component 55 is vertically provided with a right first latch shaft hole 550; the front end of the right latch component 55 is inserted into the root of the right U-shaped fork 541, which fits perfectly. The right second support ear hole 545 and the right first latch shaft hole 550 jointly pass through the right second hinge shaft 53, so that the right flip-lock unlocking component 54 and the right latch component 55 form a movable connection; this is to set a suitable movable connection structure between the right flip-lock unlocking component 54 and the right latch component 55, which has good flexibility, reasonable design, easy flipping and movement, easy operation, and is not easy to loosen;

[0065] Further, in the preferred technical solution: the right rear frame 2A includes a right rear frame rear vertical bar 2A1, a right rear frame upper horizontal bar 2A2, a right rear frame lower horizontal bar 2A3, and a right rear frame front vertical bar 2A4. The rear ends of the right rear frame upper horizontal bar 2A2 and the right rear frame lower horizontal bar 2A3 are welded and fixedly connected to the right rear frame rear vertical bar 2A1. The front part of the right rear frame upper horizontal bar 2A2 and the right rear frame lower horizontal bar 2A3 are welded and fixedly connected to the right rear frame front vertical bar 2A4. The right rear frame 2A is made of aluminum, which is lightweight. The above-mentioned right rear frame 2A is a frame structure with good sturdiness. A suitable right rear frame 2A structure is provided.

[0066] The right front frame 2C includes a right front frame rear vertical bar 2C1, a right front frame upper horizontal bar 2C2, a right front frame lower horizontal bar 2C3, and a right front frame front vertical bar 2C4. The right front frame upper horizontal bar 2C2 is integrally formed by bending and extending the top of the right front frame front vertical bar 2C4. The front end of the right front frame lower horizontal bar 2C3 is welded and fixedly connected to the right front frame front vertical bar 2C4. The right front frame rear vertical bar 2C1 is welded and fixedly connected between the rear of the right front frame upper horizontal bar 2C2 and the right front frame lower horizontal bar 2C3. The right front frame 2C is made of aluminum and is lightweight. The above-mentioned right front frame 2C is a frame structure with good sturdiness.

[0067] The right hook component 56 is welded or fixed to the inner wall of the middle section of the front vertical bar 2A4 of the right rear frame; the right fixed connection component 51 is welded or fixed to the inner wall of the middle section of the rear vertical bar 2C1 of the right front frame; the right hook component 56 and the right fixed connection component 51 are set at the same height.

[0068] The right rear frame upper crossbar 2A2 and the right front frame upper crossbar 2C2, and the right rear frame lower crossbar 2A3 and the right front frame lower crossbar 2C3 are connected together by the right frame hinge connection device 2B.

[0069] Further, in the preferred technical solution: the right rear frame 2A is made of flat aluminum tubing; the right rear frame rear vertical bar 2A1, right rear frame upper horizontal bar 2A2, right rear frame lower horizontal bar 2A3, and right rear frame front vertical bar 2A4 are made of flat aluminum tubing; the right front frame 2C is made of flat aluminum tubing; the right front frame rear vertical bar 2C1, right front frame upper horizontal bar 2C2, right front frame lower horizontal bar 2C3, and right front frame front vertical bar 2C4 are made of flat aluminum tubing;

[0070] The right frame articulation connection device 2B includes a first upper right articulation connector 2BA, a second upper right articulation connector 2BB, a first upper right articulation shaft 2BC, a first lower right articulation connector 2BD, a second lower right articulation connector 2BE, and a first lower right articulation shaft 2BF.

[0071] The first upper right hinge connector 2BA extends outward with two lugs, and a first upper right hinge interface 2BG is formed between the two lugs. The two lugs are vertically provided with a first upper right shaft hole 2BH.

[0072] The second upper right hinge connector 2BB extends outward to form an upper right hinge protrusion 2BI. The upper right hinge protrusion 2BI has a vertically formed second upper right shaft hole 2BJ, which fits perfectly into the first upper right hinge interface 2BG. The first upper right shaft hole 2BH and the second common upper right shaft hole are vertically connected to the first upper right hinge shaft 2BC, forming a movable hinge connection between the first upper right hinge connector 2BA and the second upper right hinge connector 2BB. The connector of the first upper right hinge connector 2BA is inserted into the cross-sectional tube hole of the corresponding right rear frame upper crossbar 2A2 and is welded or fixed horizontally with screws to prevent detachment. The connector of the second upper right hinge connector 2BB is inserted into the cross-sectional tube hole of the corresponding right front frame upper crossbar 2C2 and is welded or fixed horizontally with screws to prevent detachment.

[0073] The first lower right hinge connector 2BD extends outward with two lugs, and a first lower right hinge interface 2BK is formed between the two lugs. The two lugs are vertically provided with a first lower right shaft hole 2BL.

[0074] The second lower right hinge connector 2BE extends outward to form a lower right hinge protrusion 2BM. The lower right hinge protrusion 2BM has a vertically formed second lower right shaft hole 2BN, which fits perfectly into the first lower right hinge interface 2BK. The first lower right shaft hole 2BL and the second common lower right shaft hole are vertically connected to the first lower right hinge shaft 2BF, forming a movable hinge connection between the first lower right hinge connector 2BD and the second lower right hinge connector 2BE. The connector of the first lower right hinge connector 2BD is inserted into the cross-sectional tube hole of the corresponding lower crossbar 2A3 of the right rear frame and is welded or fixed with screws to prevent detachment. The connector of the second lower right hinge connector 2BE is inserted into the cross-sectional tube hole of the corresponding lower crossbar 2C3 of the right front frame and is welded or fixed with screws to prevent detachment.

[0075] The right front frame 2C is based on the first upper right hinge shaft 2BC and the first lower right hinge shaft 2BF. The right front frame 2C, the second upper right hinge connector 2BB, and the second lower right hinge connector 2BE are simultaneously flipped and folded outward relative to the right rear frame 2A.

[0076] The main technical improvement of this product is that an X-shaped hinge frame is hinged between the lower crossbar 1A3 of the left rear frame and the lower crossbar 2A3 of the right rear frame, so that the left rear frame 1A and the right rear frame 2A can be folded and unfolded, and the width of the wheelchair frame can be adjusted and compressed to reduce the packaging volume.

Claims

1. A wheelchair frame hinged folding device, comprising a left rear frame, a left frame hinged connection device, a left front frame, and a left locking / unlocking device; the front part of the left rear frame is connected to the left frame hinged connection device, the left frame hinged connection device is connected to the rear part of the left front frame, and the left front frame can be folded outwards towards the left rear frame via the left frame hinged connection device; a left locking / unlocking device is connected between the front part of the left rear frame and the rear part of the left front frame; characterized in that: The left locking and unlocking device includes a left fixed connecting component, a left first hinge shaft, a left second hinge shaft, a left flip locking and unlocking component, a left latch component, and a left hook component; The left fixed connection component is fixedly connected to the rear of the left front frame; The front end of the left fixed connecting component and the left flip-locking unlocking component are movably connected by a vertically penetrating left first hinge axis; the rear section of the left flip-locking unlocking component is a means; The middle part of the left flip-locking and unlocking component and the front end of the left latch component are movably connected by a vertically penetrating left second hinge shaft; the tail of the left latch component is provided with a left locking hook; The left hook component is fixedly connected to the front of the left rear frame; The left-flip locking and unlocking component is used to lock and unlock the left latch component; when the left locking hook of the left latch component is engaged with the left hook component, it is locked; when the left locking hook of the left latch component is disengaged from the left hook component, it is unlocked.

2. The wheelchair frame hinged folding device according to claim 1, characterized in that: The left-flip locking and unlocking component has an axial left U-shaped fork at its front middle section. The left U-shaped fork forms a left upper support lug and a left lower support lug at the top and bottom of the front middle section of the left-flip locking and unlocking component. The front ends of the left upper support lug and the left lower support lug are vertically formed with a left first support lug hole, and the roots of the left upper support lug and the left lower support lug are vertically formed with a left second support lug hole. The left fixed connecting component extends integrally with a left fixed connecting protrusion. The left fixed connecting protrusion is vertically formed with a left protrusion shaft hole. The left fixed connecting protrusion is inserted into the front end of the left U-shaped fork. The left first support lug hole and the left protrusion shaft hole are vertically passed through the left first hinge shaft, so that the left-flip locking and unlocking component and the left fixed connecting protrusion form a movable connection. The front end of the left locking component has a vertically opened left first locking shaft hole; the front end of the left locking component is inserted into the root of the left U-shaped fork, and the left second support hole and the left first locking shaft hole jointly pass through the left second hinge shaft, so that the left flip locking and unlocking component and the left locking component form a movable connection.

3. A wheelchair frame hinged folding device according to claim 1 or 2, characterized in that: The left rear frame includes a left rear frame rear vertical bar, a left rear frame upper horizontal bar, a left rear frame lower horizontal bar, and a left rear frame front vertical bar. The rear ends of the left rear frame upper horizontal bar and the left rear frame lower horizontal bar are fixedly connected to the left rear frame rear vertical bar, and the left rear frame front vertical bar is fixedly connected between the front part of the left rear frame upper horizontal bar and the left rear frame lower horizontal bar. The left front frame includes a left front frame rear vertical bar, a left front frame upper horizontal bar, a left front frame lower horizontal bar, and a left front frame front vertical bar. The left front frame upper horizontal bar is integrally formed by bending and extending the top of the left front frame front vertical bar. The front end of the left front frame lower horizontal bar is fixedly connected to the left front frame front vertical bar. The left front frame rear vertical bar is fixedly connected between the rear of the left front frame upper horizontal bar and the left front frame lower horizontal bar. The left rear frame front vertical bar is fixedly connected to the left hook component; the left fixed connection component is fixedly connected to the left front frame rear vertical bar; The left rear frame upper crossbar and the left front frame upper crossbar, and the left rear frame lower crossbar and the left front frame lower crossbar are connected together by the left frame hinge connection device.

4. The wheelchair frame hinged folding device according to claim 1, characterized in that: It also includes a right rear frame, a right frame articulation connection device, a right front frame, and a right locking and unlocking device; the front part of the right rear frame is connected to the right frame articulation connection device, the right frame articulation connection device is connected to the rear part of the right front frame, and the right front frame can be flipped and folded to the outside of the right rear frame through the right frame articulation connection device. A right-side locking and unlocking device is connected between the front part of the right rear frame and the rear part of the right front frame.

5. The wheelchair frame hinged folding device according to claim 4, characterized in that: The right locking and unlocking device includes a right fixed connecting component, a right first hinge shaft, a right second hinge shaft, a right flip locking and unlocking component, a right latch component, and a right hook component; The right fixed connection component is fixedly connected to the rear of the right front frame; The front end of the right fixed connection component and the right flip-lock unlock component are movably connected by a vertically penetrating right first hinge axis; The rear section of the right-flipping locking / unlocking mechanism is the means; The middle part of the right flip-locking and unlocking component and the front end of the right latch component are movably connected by a vertically penetrating right second hinge shaft; the tail of the right latch component is provided with a right locking hook; The right hook component is fixedly connected to the front of the right rear frame; The right-flip locking and unlocking mechanism is used to lock and unlock the right latch component; When the right locking hook of the right latch component is engaged with the right hook component, it is locked; when the right locking hook of the right latch component is disengaged from the right hook component, it is unlocked.

6. The wheelchair frame hinged folding device according to claim 5, characterized in that: The right flip-lock unlocking component has an axial right U-shaped fork at its front middle section. The right U-shaped fork forms a right upper support lug and a right lower support lug at the front middle middle section of the right flip-lock unlocking component. The front ends of the right upper support lug and the right lower support lug are vertically formed with a right first support lug hole, and the roots of the right upper support lug and the right lower support lug are vertically formed with a right second support lug hole. The right fixed connection component integrally extends with a right fixed connection protrusion, which is vertically formed with a right protrusion shaft hole. The right fixed connection protrusion is inserted into the front end of the right U-shaped fork, and the right first support lug hole and the right protrusion shaft hole are vertically formed by passing through the right first hinge shaft to form a movable connection. The front end of the right locking component is vertically provided with a right first locking shaft hole; the front end of the right locking component is inserted into the root of the right U-shaped fork, and the right second support ear hole and the right first locking shaft hole together vertically pass through the right second hinge shaft to form a movable connection.

7. A wheelchair frame hinged folding device according to claim 5 or 6, characterized in that: The right rear frame includes a right rear frame rear vertical bar, a right rear frame upper horizontal bar, a right rear frame lower horizontal bar, and a right rear frame front vertical bar. The rear ends of the right rear frame upper horizontal bar and the right rear frame lower horizontal bar are fixedly connected to the right rear frame rear vertical bar, and the right rear frame front vertical bar is fixedly connected between the front parts of the right rear frame upper horizontal bar and the right rear frame lower horizontal bar. The right front frame includes a right front frame rear vertical bar, a right front frame upper horizontal bar, a right front frame lower horizontal bar, and a right front frame front vertical bar. The right front frame upper horizontal bar is integrally formed by bending and extending the top of the right front frame front vertical bar. The front end of the right front frame lower horizontal bar is fixedly connected to the right front frame front vertical bar. The right front frame rear vertical bar is fixedly connected between the rear of the right front frame upper horizontal bar and the right front frame lower horizontal bar. The right rear frame front vertical bar is fixedly connected to the right hook component; the right fixed connection component is fixedly connected to the right front frame rear vertical bar; The right rear frame upper crossbar and the right front frame upper crossbar, and the right rear frame lower crossbar and the right front frame lower crossbar are connected together by a right frame hinge connection device.

8. A wheelchair frame hinged folding device according to claim 5 or 6, characterized in that: The right rear frame is made of flat aluminum tubing; the right front frame is made of flat aluminum tubing.

9. A wheelchair frame hinged folding device according to claim 1 or 2, characterized in that: The left rear frame is made of flat aluminum tubing; the left front frame is made of flat aluminum tubing.

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