CN213553032U

CN213553032U - Safety wheelchair

Info

Publication number: CN213553032U
Application number: CN202021804843.4U
Authority: CN
Inventors: 朱剑; 尹祎
Original assignee: CHANGSHU PINGFANG WHEELCHAIR CO LTD
Current assignee: CHANGSHU PINGFANG WHEELCHAIR CO LTD
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-06-29
Anticipated expiration: 2030-08-26

Abstract

A safety wheelchair, which comprises a seat frame, a back frame, a foot rest bracket, a pair of folding operating mechanisms and a pair of rear wheel frames, the chair comprises a chair seat frame, a pair of shock absorption mechanisms and a foot support mechanism, wherein the rear end of the chair seat frame is bent upwards in an arc state and hinged with a chair back frame, the shape of the chair back frame is Jiong-shaped, two sides of the lower part of the chair back frame are supported and connected by chair back frame supporting pipes, the rear end of the foot support bracket is tilted upwards and hinged with the chair back frame, the side part of the front end of the foot support bracket is hinged with a front wheel seat, a pair of folding operation mechanisms are arranged on the rear supporting pipes of the chair seat frame, one end of a pair of rear wheel carriers is folded upwards in an arc state and hinged with the chair seat frame, the other end of the pair of rear wheel carriers is provided with rear wheels, the pair of shock absorption mechanisms are hinged between the lower part of the chair back frame and one end of the rear wheel carriers, the foot support mechanism is hinged. The safety is ensured; ensuring the comfort of the sitting person; the pair of rear wheel frames has ideal supporting and controlling functions and small volume in a storage state.

Description

Safety wheelchair

Technical Field

The utility model belongs to the technical field of daily life articles for use, concretely relates to safe wheelchair car.

Background

The wheelchair is a tool for riding instead of walk for special people such as disabled people, elderly people, people with diseases and people who tend to get well, and technical information related to wheelchairs is not disclosed in the published chinese patent documents, such as CN2745544Y (multifunctional electric wheelchair), CN201379725Y (obstacle-avoiding electric wheelchair), CN101589979B (a multifunctional electric wheelchair), CN201684098U (electric wheelchair), CN102764185B (electric wheelchair), CN202682214U (electric wheelchair), CN103202748A (electric wheelchair capable of preventing backward tilting), CN103767838B (electric wheelchair), CN103735374B (electric wheelchair with body capable of being connected and separated with electric mechanism), CN107468438A (folding electric wheelchair), CN102688124B (linked electric wheelchair with lying type) and CN209220733U (chair back angle adjusting device of folding electric wheelchair), CN201150606Y (a shock-absorbing wheelchair), CN201542842U (a shock-absorbing wheelchair), CN208388877U (CN 6335) and foldable wheelchair (CN 206198180U), and so on.

As is known, when a person with disabled lower limbs or a person whose consciousness tends to be lost is sitting on a wheelchair, an example is not clear in which feet slide from foot rests (also referred to as "foot rests" and the same applies hereinafter) of the wheelchair and are dragged and scraped off a floor during driving of the wheelchair. Since the wheelchair vehicles of the related art (including electric and non-electric vehicles) including the above-mentioned patent do not have a function of temporarily binding the feet of the seated person to secure the feet, the feet of the seated person are usually bound to the footrest by an attendant or the seated person himself/herself using a binding string that is separately carried, and the binding of the feet by the attendant or the seated person himself/herself is released before returning to and getting off the wheelchair. It is known that the above operation is very troublesome, which takes a long time, and the binding effect is difficult to ensure. Especially, the time spent on binding and unbinding the split type foot supports (such as CN201379725Y, CN102688124B and the like) is long and tedious. In addition, the above-mentioned safety risk is also created if the bandage is abnormally loosened and not discovered in time.

In view of the above problems in the prior art, it is necessary to compensate, and the technical solutions described below are made in this context.

SUMMERY OF THE UTILITY MODEL

The task of the utility model is to provide a help prescribe a limit to on the foot holds in the palm reliably with the both feet of the person of taking a seat and can avoid the landing and produce with the terrace and drag the safe wheelchair car of wiping.

The task of the utility model is accomplished in this way, a safe wheelchair comprises a seat frame, a back frame, a foot rest support, a pair of folding operation mechanisms, a pair of rear wheel frames, a pair of shock absorbing mechanisms and a foot rest mechanism, the rear end of the seat frame is bent upwards in a circular arc state and hinged with the back frame, the shape of the back frame is generally Jiong-shaped and is supported and connected by a back frame supporting tube between the two sides of the lower part, the rear end of the foot rest support is tilted upwards and is hinged with the back frame, the front end side part of the foot rest support is hinged with the front wheel seat at the front end of the seat frame and is fixed with a foot rest support reinforcing tube between the two sides of the front end of the foot rest support, a pair of folding operation mechanisms are arranged on the back supporting tube of the seat frame and are positioned at the two ends of the back supporting tube of the seat frame, a pair of rear wheel frames corresponds to the two sides of the seat frame and one end of the pair of the rear wheel frames is folded upwards in a circular arc state and is hinged with the seat, and one end of the pair of rear wheel frames far away from the chair seat frame is respectively provided with a rear wheel, a wheel hub of the rear wheel is provided with a motor for driving the rear wheel, the pair of shock absorbing mechanisms are respectively hinged between the lower part of the chair back frame and one end of the pair of rear wheel frames far away from the chair seat frame in a state of respectively corresponding to the front parts of two sides of the chair back frame and are matched with or disengaged from the pair of folding operation mechanisms, the foot rest mechanism is hinged with the front end of the foot rest bracket, the upper end of the front wheel seat is hinged with the front end of the chair seat frame, and the lower end of the front wheel seat is rotatably provided with a front wheel.

In a specific embodiment of the present invention, the foot supporting mechanism includes a foot bracket, a foot supporting plate and a pair of foot bracket hinge rods, one end of each of the pair of foot bracket hinge rods is hinged to the front end of the foot bracket through a first foot bracket hinge rod joint i, the other end of each of the pair of foot bracket hinge rods is fixed with a second foot bracket hinge rod joint ii, two ends of the foot bracket are respectively folded upwards to form a foot bracket longitudinal arm, a foot bracket longitudinal arm hinge joint is fixed at the end of the foot bracket longitudinal arm, the foot bracket longitudinal arm hinge joint is hinged to the second foot bracket hinge rod joint ii, and the foot supporting plate is fixed on the upward side of the bottom of the foot bracket; the foot binding mechanism is sleeved on the foot bracket and corresponds to the upper part of the foot supporting plate.

In another specific embodiment of the present invention, the foot binding mechanism includes a binding belt ring and a binding belt, the binding belt ring is fixed to one end of the binding belt, and the other end of the binding belt passes through one end of the foot support, the binding belt ring and the other end of the foot support in sequence and then corresponds to the upper portion of the foot support plate, and forms a mutual overlapping hook-and-loop connection or a relationship of releasing the hook-and-loop connection.

In a further specific embodiment of the present invention, the foot bracket is shaped like a square, the arm of one end of the square is a first lead arm i, and the arm of the other end of the square is a second lead arm ii, one end of the foot support plate is formed with a first lead groove i at a position corresponding to the first lead arm i, and the other end of the foot support plate is formed with a second lead groove ii at a position corresponding to the second lead arm ii, the other end of the restraining strip sequentially passes through the first lead arm i and the second lead arm ii to correspond to the upper side of the foot support plate in the length direction and corresponds to the first lead groove i at the first lead arm i, and the position of the second lead arm ii corresponds to the second lead groove ii.

In another specific embodiment of the present invention, a first adhesive strip i and a second adhesive strip ii are fixed to the binding band, the first adhesive strip i and the second adhesive strip ii correspond to each other and when the first adhesive strip i is a male adhesive strip, the second adhesive strip ii is a female adhesive strip, and when the first adhesive strip i is a female adhesive strip, the second adhesive strip ii is a male adhesive strip.

In still another embodiment of the present invention, the pair of shock absorbing mechanisms each comprises a shock absorbing upper connecting seat, a shock absorbing lower connecting seat, a shock absorbing rod and a shock absorbing spring, the shock absorbing upper connecting seat is fixed to the lower portion of the back frame, the shock absorbing lower connecting seat is fixed to the end of the rear wheel frame remote from the seat frame, an upper shock absorbing connecting head is connected to the upper end of the shock absorbing rod, a lower shock absorbing connecting head is connected to the lower end of the shock absorbing rod, the upper shock absorbing connecting head is hinged to the upper shock absorbing connecting seat of the shock absorbing rod through an upper connecting head hinge screw shaft at a position corresponding to the upper connecting seat of the shock absorbing rod, and the upper connecting head hinge screw shaft is engaged with or disengaged from the folding operation mechanism at one end of the pair of folding operation mechanisms, the lower shock absorbing connecting head is hinged to the lower connecting seat of the shock absorbing rod through a lower hinge connecting head screw shaft, the shock, the upper end of the shock-absorbing spring is supported on a spring force adjusting nut arranged on an upper connecting head of the shock-absorbing rod, while the lower end is supported on a supporting disc which is supported on a lower connecting seat of the shock-absorbing rod; and a chair seat frame rear supporting pipe cushion block is arranged on the chair seat frame rear supporting pipe of the chair seat frame.

In a more specific embodiment of the present invention, a shock absorbing pad embedding cavity is formed on the upper portion of the connecting seat of the shock absorbing rod facing to one end of the backrest frame, and one end of the shock absorbing rod, which is far away from the chair back frame, of the connecting seat is provided with a pair of upper connecting seat hinge lugs, the hinged lugs of the upper connecting seats are respectively provided with an upper connecting head hinged screw shaft hole at the corresponding position, the upper end of the upper connector of the shock-absorbing rod corresponds to the space between the hinge lugs of the pair of upper connecting seats and is provided with an upper connector screw shaft abdicating hole, the upper connector hinged screw shaft passes through the upper connector hinged screw shaft hole and the upper connector screw shaft abdication hole and is limited by a screw shaft limiting nut which is screwed on the upper connector hinged screw shaft, the upper connector is hinged with one end of the screw shaft extending out of the screw shaft limiting nut and is matched with or disengaged from the pair of folding operating mechanisms; a shock-absorbing cushion block is embedded in a position corresponding to the shock-absorbing cushion block embedding cavity, the upper part of the shock-absorbing cushion block extends out of the shock-absorbing cushion block embedding cavity, and the lower part of the shock-absorbing cushion block is fixed by a shock-absorbing cushion block fixing screw; the position of the cushion block of the rear supporting tube of the chair seat frame corresponds to the position of the shock-absorbing cushion block and is contacted with the shock-absorbing cushion block or is released from the contact with the shock-absorbing cushion block; the outer wall of the shock-absorbing rod upper connector is provided with shock-absorbing rod upper connector external threads, and the spring force adjusting nut is in threaded fit with the shock-absorbing rod upper connector external threads.

In yet another specific embodiment of the present invention, the pair of folding operation mechanisms each include a pivotal lock plate seat, a pivotal lock plate, a return spring and a pivotal lock plate anti-turnover stopper pin, the pivotal lock plate seat is fixed to the seat frame rear support tube, the middle portion of the pivotal lock plate is pivotally mounted on the pivotal lock plate seat through the pivotal lock plate shaft at a position corresponding to the pivotal lock plate chamber of the pivotal lock plate seat, one end of the pivotal lock plate extends below the pivotal lock plate chamber and constitutes an upper connector hinge screw shaft acting chamber at a position corresponding to an end of the upper connector hinge screw shaft extending outside the screw shaft limiting nut, the end of the upper connector hinge screw shaft extending outside the screw shaft limiting nut is engaged with or disengaged from the upper connector hinge screw shaft acting chamber, one end of the return spring is hung on the first return spring shaft i, the other end of the return spring is hung on a second return spring shaft II, the first return spring shaft I is fixed on the pivoting lock plate seat, the second return spring shaft II is fixed at the other end of the pivoting lock plate, the pivoting lock plate anti-overturning stop pin is fixed on the pivoting lock plate seat at a position corresponding to the pivoting lock plate, and the middle part of the pivoting lock plate anti-overturning stop pin corresponds to the pivoting lock plate cavity; a wheelchair folding manual operating lever is connected between the pivoting lock plates of the pair of folding operating mechanisms.

In a more specific embodiment of the present invention, a seat frame hinge seat is fixed on each of two sides of the seat back frame, and a seat frame hinge joint is formed at the rear end of the seat frame and is hinged to the seat frame hinge seat through a seat frame hinge joint pin; a foot rest support hinged seat is respectively fixed at the two sides of the chair back frame and at the position below the chair seat frame hinged seat, a foot rest support hinged joint is formed at the rear end of the two sides of the foot rest support, the foot rest support hinged joint is hinged with the foot rest support hinged seat through a foot rest support hinged joint pin shaft, a front wheel seat connecting arm is fixed at the front end of the foot rest support, the front wheel seat connecting arm is hinged with the middle part of the front wheel seat through a front wheel seat connecting arm hinged shaft, and the upper end of the front wheel seat is hinged with the chair seat frame hinged joint seat fixed at the front end of the chair seat frame through a front wheel seat hinged joint; a rear wheel frame supporting tube is fixed between the front ends of the pair of rear wheel frames, and one ends of the pair of rear wheel frames facing the seat frame are respectively hinged with the seat frame through rear wheel frame hinging seats; a chair seat frame front supporting pipe is fixed between the front parts of the two sides of the chair seat frame.

In yet another specific embodiment of the present invention, a handrail frame is hinged to both sides of the rear end of the seat frame, a handrail frame is hinged to a position corresponding to the handrail frame, and a handrail is hinged to the upper portion of the handrail frame and faces the one end of the back frame and is connected to the back frame through a handrail connecting seat.

The technical scheme provided by the utility model the technical effect lie in: the foot support mechanism is provided with a foot binding mechanism, so that the feet of the rider can be reliably limited on the foot support mechanism, and the safety is ensured. In addition, the pair of shock absorbing mechanisms can play a good shock absorbing role, so that the comfort of a user can be fully ensured; the pair of shock absorbing mechanisms are respectively arranged between the lower end corresponding to the two sides of the chair back frame and one end of the pair of rear wheel frames far away from the chair seat frame, and can be matched with the pair of folding operating mechanisms to lock and unlock, so that the pair of rear wheel frames can play an ideal supporting and controlling role in a use state, and the pair of rear wheel frames and the rear wheels can be attached to the two sides of the vehicle body in a non-use folding state to reduce the volume in a storage state.

Drawings

Fig. 1 is a schematic view of an embodiment of the present invention.

Fig. 2 is an enlarged view of a portion a of fig. 1.

Figure 3 is a schematic view of the foot restraint mechanism shown in figures 1 and 2 in a use configuration.

FIG. 4 is a detailed structural view of the pair of suspension mechanisms shown in FIG. 1.

Fig. 5 is a schematic view of the utility model in a folded state when being stored.

Detailed Description

In order to make the technical essence and advantages of the present invention more clear, the applicant below describes in detail the embodiments, but the description of the embodiments is not a limitation of the present invention, and any equivalent changes made according to the inventive concept, which are only formal and not essential, should be considered as the technical scope of the present invention.

In the following description, all the directional concepts related to up, down, left, right, front and rear are based on the position state (the state of the traveling direction of the wheelchair) of fig. 1, and thus it cannot be understood as a particular limitation to the technical solution provided by the present invention.

Referring to fig. 1, there are shown a seat frame 1, a back frame 2, a leg rest bracket 3, a pair of folding operation mechanisms 4, a pair of rear wheel frames 5, a pair of shock absorbing mechanisms 6 and a leg rest mechanism 7, the rear end of the seat frame 1 is bent upward in an arc state and hinged to both sides of the back frame 2, the back frame 2 is substantially Jiong-shaped and is supported and connected between both sides of the lower portion by a back frame support pipe 23, the rear end of the leg rest bracket 3 is raised upward and hinged to both sides of the back frame 2 as well, the front end side portion of the leg rest bracket 3 is hinged to front wheel seats 15 on both sides of the front end of the seat frame 1 and a leg rest bracket reinforcing pipe 33 is fixed between both sides of the front end of the leg rest bracket 3, the pair of folding operation mechanisms 4 is provided on the seat frame support pipe 11 of the rear seat frame 1 and located at both ends of the seat frame support pipe 11, the pair of rear wheel frames 5 correspond to both sides of the seat frame 1 and one end of the pair of the rear wheel frames 5 facing the seat frame 1 is in an arc state The pair of shock absorbing mechanisms 6 are respectively hinged between the lower part of the seat back frame 2 and one end of the pair of rear wheel frames 5 away from the seat frame 1 and engaged with or disengaged from the pair of folding operation mechanisms 4 in a state of corresponding to the front sides of both sides of the seat back frame 2, the footrest mechanism 7 is hinged to the front end of the footrest bracket 3, the upper end of the front wheel seat 15 is hinged to the front end of the seat frame 1, and the lower end is rotatably provided with a front wheel 151.

It is fully understood that the wheelchair of the present invention is a power wheelchair according to the motor 511 for driving the rear wheel 51 shown in the drawings, and thus although the battery and the controller are not shown in the drawings, the functions of the battery and the controller and the arrangement position on the wheelchair are well known, for example, the patent documents mentioned in the above background of the invention by the applicant, and the applicant will not be explained again.

As the technical scheme provided by the utility model: the foot support mechanism 7 is provided with a foot binding mechanism 8.

Referring to fig. 2 in conjunction with fig. 1, the preferred, but not absolutely limited, structure of the aforementioned footrest mechanism 7 is as follows: the foot support comprises a foot bracket 71, a foot supporting plate 72 and a pair of foot bracket hinge rods 73, wherein one end of each of the pair of foot bracket hinge rods 73, namely the upper end shown in figure 1, is hinged with the front end of the foot bracket 3 through a foot bracket hinge rod first hinge joint I731 (shown in figure 1), the other end of each of the pair of foot bracket hinge rods 73, namely the lower end shown in figure 1, is fixedly provided with a foot bracket hinge rod second hinge joint II 732 (shown in figures 1 and 2), two ends of the foot bracket 71 are respectively upwards folded and unfolded with a foot bracket longitudinal arm 711, a foot bracket longitudinal arm hinge joint 7111 is fixed at the tail end of the foot bracket longitudinal arm 711, the foot bracket longitudinal arm hinge joint 7111 is hinged with the foot bracket hinge rod second hinge joint II 732, and the foot supporting plate 72 is preferably fixed on the upward side of the bottom of the foot bracket 71 in a welding manner; the foot binding mechanism 8 is sleeved on the foot bracket 71 and corresponds to the upper part of the foot supporting plate 72.

The foot binding mechanism 8 includes a binding belt ring 81 and a binding belt 82, the binding belt ring 81 is fixed to one end of the binding belt 82, and the other end of the binding belt 82 passes through one end of the foot bracket 71, the binding belt ring 81 and the other end of the foot bracket 71 in sequence, corresponds to the upper side of the foot support plate 72, and forms a relationship of overlapping hook and loop connection or releasing hook and loop connection (to be described later).

With particular attention to fig. 2 and 3 and with continued reference to fig. 1, the foot bracket 71 is rectangular parallelepiped, the arm at one end of the square is configured as a first leasing arm I712, while the arm at the other end of the square is configured as a second leasing arm II 713, a strap first relief groove i 721 is formed at one end of the aforementioned foot plate 72 and at a position corresponding to the first harness arm i 712, and a second restraining-strap receding groove (II) 722 is formed at the other end of the foot supporting plate 72 and at a position corresponding to the second restraining-strap arm (II) 713, the other end (also called free end) of the restraining strap 82 passes through the first and second restraining arms (I712) and (II) 713 in sequence and corresponds to the upper side of the length direction of the foot supporting plate 72 and the position of the restraining strap 82 at the first restraining-strap arm (I712) corresponds to the first restraining-strap receding groove (I721), and the second harness arm ii 713 corresponds to the aforementioned restraining-strap second abdicating groove ii 722.

As shown in fig. 2 and 3, a first sticky buckle strip i 821 and a second sticky buckle strip ii 822 are fixed on the binding band 82, the first sticky buckle strip i 821 and the second sticky buckle strip ii 822 correspond to each other, when the first sticky buckle strip i 821 is a male sticky buckle strip, the second sticky buckle strip ii 822 is a female sticky buckle strip, and when the first sticky buckle strip i 821 is a female sticky buckle strip, the second sticky buckle strip ii 822 is a male sticky buckle strip.

According to the schematic representation of fig. 1 to 3 and in combination with the common general knowledge: when the feet of the rider step on the foot supporting plate 72, the restraining belt 82 corresponds to the upper parts of the feet, the feet can be restrained between the foot supporting plate 72 and the restraining belt 52 only by reasonably collecting and placing the restraining belt 82, and after the restraining belt 82 is tightened to a reasonable degree, the second sticky buckle strip II 822 on the restraining belt 82 is adhered to the first sticky buckle strip I821. The first sticker i 821 and the second sticker ii 822 are also referred to as magic tapes.

In order to embody the utility model discloses the effect of moving away to avoid possible earthquakes and the like that mentions in the above technical effect fence, the utility model provides a technical scheme's specific embodiment as follows:

referring to FIG. 4 in combination with FIG. 1, each of the pair of shock absorbing mechanisms 6 includes a shock absorbing rod upper connecting seat 61, a shock absorbing rod lower connecting seat 62, a shock absorbing rod 63 and a shock absorbing spring 64, the shock absorbing rod upper connecting seat 61 is fixed to the lower portion of the backrest frame 2 by welding, the shock absorbing rod lower connecting seat 62 is fixed to the end of the rear wheel frame 5 away from the seat frame 1 by welding, a shock absorbing rod upper connecting head 631 is fixedly connected to the upper end of the shock absorbing rod 63, a shock absorbing rod lower connecting head 632 is fixedly connected to the lower end of the shock absorbing rod 63, the shock absorbing rod upper connecting head 631 is hinged to the shock absorbing rod upper connecting seat 61 by an upper connecting head hinge screw shaft 6311 at a position corresponding to the shock absorbing rod upper connecting seat 61, and the upper connecting head hinge screw shaft 6311 is engaged with or disengaged from the folding operation mechanism 4 toward one end of the pair of folding operation mechanisms 4, i., the shock rod lower connection head 632 is hinged to the shock rod lower connection base 62 by a lower connection head hinge screw shaft 6321, a shock spring 64 is fitted over the shock rod 63, the upper end of the shock spring 64 is supported by a spring force adjusting nut 6312 provided on the shock rod upper connection head 631, and the lower end is supported by a support plate 633 supported by the shock rod lower connection base 62. As shown in fig. 4, the support plate 633 is located above the shock rod lower connector 632.

As shown in fig. 4, a cushion block embedding cavity 611 is formed at an upper portion of one end of the connecting seat 61 facing the back frame 2 on the cushion rod, and a pair of upper connecting seat hinge lugs 612 are formed at an end of the connecting seat 61 away from the back frame 2 on the cushion rod, an upper connector hinge screw shaft hole 6121 is formed at each of the pair of upper connecting seat hinge lugs 612 and at positions corresponding to each other, an upper connector hinge screw shaft receding hole 6313 is formed at an upper end of the upper connecting seat hinge lug corresponding to between the pair of upper connecting seat hinge lugs 612, the upper connector hinge screw shaft 6311 passes through the upper connector hinge screw shaft hole 6121 and the upper connector screw shaft receding hole 6313 and is defined by a screw shaft defining nut 63111 screwed on the upper connector hinge screw shaft 6311, wherein an end of the upper connector hinge screw shaft 6311 extending out of the screw shaft defining nut 63111 is engaged with or disengaged from the pair of folding operation mechanisms 4, i.e., locked or unlocked; a shock absorbing cushion block 6111 is embedded in the position corresponding to the shock absorbing cushion block embedding cavity 611, the upper part of the shock absorbing cushion block 6111 extends out of the shock absorbing cushion block embedding cavity 611, and the lower part is fixed by a shock absorbing cushion block fixing screw 61111; a seat frame rear support tube pad 111 is provided on the seat frame rear support tube 11 of the seat frame 1 at a position corresponding to the cushion block 6111, and the seat frame rear support tube pad 111 is brought into contact with or released from the cushion block 6111. Specifically, the wheelchair is in the unfolded use state shown in fig. 1, the seat frame rear support tube pad 111 is in contact with the cushion pad 6111, whereas in the folded state, that is, in the state shown in fig. 5, it is separated.

Referring also to FIG. 4, a shock rod upper connector external thread 6314 is formed on the outer wall of the shock rod upper connector 631, and the spring force adjusting nut 6312 is threadedly engaged with the shock rod upper connector external thread 6314. When the spring force adjustment nut 6312 is screwed down along the shock rod upper connector external thread 6314, the degree of compression of the shock rod spring 64 (i.e., shock spring) is increased, and vice versa, so that the desired shock absorbing effect is obtained by the adjustment.

Continuing with fig. 4 and in conjunction with fig. 1, each of the pair of folding operators 4 includes a pivot latch plate holder 41, a pivot latch plate 42, a return spring 43 and a pivot latch plate anti-roll-over stopper pin 44, the pivot latch plate holder 41 being preferably fixed to the seat frame rear support tube 11 by welding, the middle portion of the pivot latch plate 42 being pivotally mounted on the pivot latch plate holder 41 by a pivot latch plate shaft 421 at a position corresponding to the pivot latch plate cavity 411 of the pivot latch plate holder 41, one end of the pivot latch plate 42 extending below the pivot latch plate cavity 411 and constituting an upper-connector hinge screw shaft acting cavity 422 at a position corresponding to the end of the upper-connector hinge screw shaft 6311 extending outside the screw shaft defining nut 63111, the end of the upper-connector hinge screw shaft 6311 extending outside the screw shaft defining nut 63111 being engaged with or disengaged from the upper-connector hinge screw shaft acting cavity 422, namely, locking or unlocking, one end of the return spring 43 is hung on a first return spring shaft i 431, the other end of the return spring 43 is hung on a second return spring shaft ii 432, the first return spring shaft i 431 is fixed on the pivoting latch plate holder 41, the second return spring shaft ii 432 is fixed on the other end of the pivoting latch plate 42, the pivoting latch plate anti-roll bar pin 44 is fixed on the pivoting latch plate holder 41 at a position corresponding to the pivoting latch plate 42, and the middle part of the pivoting latch plate anti-roll bar pin 44 also corresponds to the pivoting latch plate cavity 411; a wheelchair folding manual operation lever 45 is connected between the aforementioned pivot lock plates 42 of the pair of folding operation mechanisms 4. As can be seen from the foregoing description, the two pivoting latch plates 42 share a single wheelchair folding manual lever 45; the angle of rotation of the pivot lock plate 42 is limited due to the provision of the pivot plate anti-roll bar pin 44.

Please refer to fig. 1, a seat frame hinge seat 21 is fixed at the lower part of each of the two sides of the seat back frame 2, a seat frame hinge 12 is formed at the rear end of each of the two sides of the seat 1, and the seat frame hinge 12 is hinged with the seat frame hinge seat 21 through a seat frame hinge pin 121; a foot rest support hinge seat 22 is fixed on each of both sides of the back frame 2 and below the seat frame hinge seat 21, a foot rest support hinge joint 31 is formed at the rear end of each of both sides of the foot rest support 3, the foot rest support hinge joint 31 is hinged to the foot rest support hinge seat 22 through a foot rest support hinge joint pin 311, a front wheel seat connecting arm 32 is fixed at each of the front ends of the foot rest supports 3, the front wheel seat connecting arm 32 is hinged to the middle of the front wheel seat 15 through a front wheel seat connecting arm hinge joint 321, and the upper end of the front wheel seat 15 is hinged to the seat frame hinge joint seat 16 at the bent portion of the front end of the seat frame 1 through a front wheel seat hinge joint 152.

A rear wheel frame support tube 52 is fixed between the front ends of the pair of rear wheel frames 5, and one ends of the pair of rear wheel frames 5 facing the seat frame 1 are respectively hinged with the seat frame 1 through a rear wheel frame hinge seat 53; a seat frame front support pipe 13 (herein, front is referred to as a direction of travel of the wheelchair) is fixed between both side front portions of the seat frame 1.

As shown in fig. 1, a handrail frame hinge seat 14 is respectively provided at both rear portions, i.e., both rear ends, of the seat frame 1, a handrail frame 141 is hinged at a position corresponding to the handrail frame hinge seat 14, a handrail 1411 is hinged at an upper portion of the handrail frame 141, and one end of the handrail 1411 facing the seat back frame 2 is connected to the seat back frame 2 through a handrail connecting seat 14111.

In the usage state shown in fig. 1, the pair of shock absorbing mechanisms 6 has a good shock absorbing effect on the rear portion of the seat frame 2, and the pair of shock absorbing mechanisms 6 has an ideal support and control effect on the pair of rear wheel frames 5, respectively, so that when the road surface is uneven, the pair of shock absorbing mechanisms 6 has a good buffering and shock absorbing effect, and the comfort of the passengers is ensured.

Referring to fig. 5, fig. 5 shows the wheelchair in a folded state, when the utility model is changed from the use state shown in fig. 1 to a storage state of non-use or non-use, the wheelchair folding manual operation lever 45 of the structural system of the folding operation mechanism 4 is lifted upwards by the user or an attendant, the wheelchair folding manual operation lever 45 drives the pivoting lock plate 42 to rotate clockwise by an angle against the reaction force of the return spring 43, at this time, the upper connector hinge screw shaft action chamber 422 is disengaged from the upper connector hinge screw shaft 6311, that is, the upper connector hinge screw shaft 6311 is disengaged from the upper connector hinge screw shaft action cavity 422, so as to achieve the aforementioned unlocking, in the unlocked state, the seat frame 1, the back frame 2, the footrest brackets 3, the pair of rear wheel frames 5, and the pair of foldable shock absorbing mechanisms 6 can be folded as shown in fig. 5. In the folded state, due to the foldability of the pair of suspension mechanisms 6 and the foldability (folding/unfolding) of the pair of front wheel seats 15, the rear wheels 51 and the front wheels 72 can be brought into close contact with each other in the vehicle body direction, that is, inward, and the volume can be significantly reduced for easy storage. When the wheelchair is to be brought back from the state of fig. 5 to the state shown in fig. 1, the reverse process is performed, and the pivot lock plate 42 is rotated in the reverse direction (counterclockwise) by an angle against the reverse direction by the restoring force of the return spring 43, the upper joint hinge screw shaft 6311 is brought into engagement with the upper joint hinge screw shaft action chamber 422, that is, into the locked state, and the wheelchair assumes the seatable state shown in fig. 1. Furthermore, it can be determined without any doubt, according to the expert knowledge: a seat cushion is arranged on the seat frame 1, and a back cushion is arranged on the seat back frame 2.

To sum up, the technical solution provided by the present invention remedies the defects in the prior art, successfully completes the invention task, and faithfully embodies the technical effects mentioned in the above technical effect column by the applicant.

Claims

1. A safety wheelchair comprises a seat frame (1), a seat back frame (2), a foot support bracket (3), a pair of folding operation mechanisms (4), a pair of rear wheel frames (5), a pair of shock absorbing mechanisms (6) and a foot support mechanism (7), wherein the rear end of the seat frame (1) is bent upwards in a circular arc state and hinged with the seat back frame (2), the shape of the seat back frame (2) is generally Jiong-shaped, the two sides of the lower part of the seat back frame are supported and connected by a seat back frame supporting tube (23), the rear end of the foot support bracket (3) is upwards tilted and also hinged with the seat back frame (2), the side part of the front end of the foot support bracket (3) is hinged with a front wheel seat (15) at the front end of the seat frame (1), a foot support bracket reinforcing tube (33) is fixed between the two sides of the front end of the foot support bracket (3), the pair of folding operation mechanisms (4) is arranged on the rear supporting tube (11) of the seat back frame (1) and positioned on the two sides of the seat back supporting tube (11) of the seat frame (11) A pair of rear wheel frames (5) corresponding to both sides of the seat frame (1) and having one ends of the rear wheel frames (5) facing the seat frame (1) folded upward in an arc state and hinged to the seat frame (1), and one ends of the rear wheel frames (5) remote from the seat frame (1) each being provided with a rear wheel (51) and being provided with a motor (511) for driving the rear wheel (51) on a hub of the rear wheel (51), a pair of damper mechanisms (6) hinged between a lower portion of the seat frame (2) and one ends of the rear wheel frames (5) remote from the seat frame (1) and being engaged with or disengaged from the pair of folding operation mechanisms (4) in a state corresponding to both sides front of the seat frame (2), a footrest mechanism (7) hinged to a front end of the footrest bracket (3), an upper end of the front wheel seat (15) being hinged to a front end of the seat frame (1), and a front wheel (151) is rotatably arranged at the lower end, characterized in that a foot binding mechanism (8) is arranged on the foot supporting mechanism (7).

2. The safety wheelchair as claimed in claim 1, wherein the foot rest mechanism (7) comprises a foot rest (71), a foot rest plate (72) and a pair of foot rest hinge rods (73), one end of each of the pair of foot rest hinge rods (73) is hinged to the front end of the foot rest support (3) through a first foot rest hinge rod joint I (731), the other end of each of the pair of foot bracket hinged rods (73) is respectively fixed with a second hinged joint II (732) of the foot bracket hinged rod, two ends of each foot bracket (71) are respectively upwards folded and unfolded with a foot bracket longitudinal arm (711), a foot bracket longitudinal arm hinge joint (7111) is fixed at the tail end of the foot bracket longitudinal arm (711), the foot bracket longitudinal arm hinge joint (7111) is hinged with a second hinge joint (732) of the foot bracket hinge rod, and the foot supporting plate (72) is fixed on one side of the bottom of the foot bracket (71) facing upwards; the foot binding mechanism (8) is sleeved on the foot bracket (71) and corresponds to the upper part of the foot supporting plate (72).

3. The safety wheelchair as claimed in claim 2, wherein the foot restraint mechanism (8) comprises a restraint strap loop (81) and a strap (82), the restraint strap loop (81) is fixed to one end of the strap (82), and the other end of the strap (82) is arranged above the foot support plate (72) after passing through one end of the foot support (71), the restraint strap loop (81) and the other end of the foot support (71) in sequence and forms a relationship of overlapping hook and loop connection or releasing hook and loop connection.

4. The safety wheelchair as claimed in claim 3, wherein the foot bracket (71) is shaped like a Chinese character 'kou', one end of which is formed as a first harness arm I (712), and the other end of which is formed as a second harness arm II (713), a first strap relief groove I (721) is formed at one end of the foot plate (72) at a position corresponding to the first harness arm I (712), and a second strap relief groove II (722) is formed at the other end of the foot plate (72) at a position corresponding to the second harness arm II (713), the other end of the restraining strap (82) passes through the first harness arm I (712) and the second harness arm II (713) in sequence to correspond to a lengthwise upper side of the foot plate (72) and the restraining strap (82) corresponds to the first strap relief groove I (721) at a position of the first harness arm (712), and corresponds to the restraining belt second abdicating groove ii (722) at the position of the second harness arm ii (713).

5. A safety wheelchair as claimed in claim 3 or 4, wherein a first sticker I (821) and a second sticker II (822) are fixed to the restraining band (82), the first sticker I (821) and the second sticker II (822) correspond to each other and the second sticker II (822) is a female sticker when the first sticker I (821) is a male sticker and the second sticker II (822) is a male sticker when the first sticker I (821) is a female sticker.

6. The safety wheelchair as claimed in claim 1, wherein the pair of suspension mechanisms (6) each comprise an upper suspension rod connecting seat (61), a lower suspension rod connecting seat (62), a suspension rod (63) and a suspension spring (64), the upper suspension rod connecting seat (61) is fixed to the lower portion of the seat back frame (2), the lower suspension rod connecting seat (62) is fixed to the end of the rear wheel frame (5) away from the seat frame (1), an upper suspension rod connecting seat (631) is connected to the upper end of the suspension rod (63), a lower suspension rod connecting seat (632) is connected to the lower end of the suspension rod (63), the upper suspension rod connecting seat (631) is hinged to the upper suspension rod connecting seat (61) through an upper connecting seat hinge screw shaft (6311) at a position corresponding to the upper suspension rod connecting seat (61) and the upper suspension rod connecting seat (61), and the upper connecting seat hinge screw shaft (6311) faces the end of the pair of folding mechanisms (4) and the folding mechanisms (4) or the folding mechanisms (4) respectively The lower connection head (632) of the shock absorbing rod is hinged with the lower connection seat (62) of the shock absorbing rod through a lower connection head hinged screw shaft (6321), a shock absorbing spring (64) is sleeved on the shock absorbing rod (63), the upper end of the shock absorbing spring (64) is supported on a spring force adjusting nut (6312) arranged on the upper connection head (631) of the shock absorbing rod, the lower end is supported on a support disc (633), and the support disc (633) is supported on the lower connection seat (62) of the shock absorbing rod; a seat frame rear supporting tube cushion block (111) is arranged on a seat frame rear supporting tube (11) of the seat frame (1).

7. The safety wheelchair as claimed in claim 6, wherein the upper portion of the end of the seat back frame (2) of the connecting base (61) facing the shock-absorbing rod is formed with a shock-absorbing pad embedding cavity (611), and the end of the seat back frame (2) away from the connecting base (61) on the shock-absorbing rod is formed with a pair of upper connecting base hinge lugs (612), an upper connecting base hinge screw shaft hole (6121) is respectively opened on the pair of upper connecting base hinge lugs (612) and at the position corresponding to each other, the upper end of the upper connecting base (631) on the shock-absorbing rod corresponds to the space between the pair of upper connecting base hinge lugs (612) and is opened with an upper connecting base screw shaft abdicating hole (6313), the upper connecting base hinge screw shaft (6311) passes through the upper connecting base hinge screw shaft hole (6121) and the upper connecting base screw shaft abdicating hole (6313) and is defined by a screw shaft limiting nut (63111) screwed on the upper connecting base hinge screw shaft (6311), wherein one end of the upper connector hinge screw shaft (6311) extending out of the screw shaft limiting nut (63111) is engaged with or disengaged from the pair of folding operation mechanisms (4); a shock-absorbing cushion block (6111) is embedded at the position corresponding to the shock-absorbing cushion block embedding cavity (611), the upper part of the shock-absorbing cushion block (6111) extends out of the shock-absorbing cushion block embedding cavity (611), and the lower part is fixed by a shock-absorbing cushion block fixing screw (61111); the position of the cushion block (111) of the rear supporting tube of the chair seat frame corresponds to the shock-absorbing cushion block (6111) and is contacted with or released from the shock-absorbing cushion block (6111); the outer wall of the shock-absorbing rod upper connector (631) is provided with a shock-absorbing rod upper connector external thread (6314), and the spring force adjusting nut (6312) is in threaded fit with the shock-absorbing rod upper connector external thread (6314).

8. A safety wheelchair in accordance with claim 6, characterised in that the folding operating mechanisms (4) each comprise a pivoting latch plate holder (41), a pivoting latch plate (42), a return spring (43) and a pivoting latch plate anti-roll bar (44), the pivoting latch plate holder (41) being fixed to the seat frame rear support tube (11), the middle part of the pivoting latch plate (42) being pivoted to the pivoting latch plate holder (41) by means of a pivoting latch plate shaft (421) at a position corresponding to the pivoting latch plate cavity (411) of the pivoting latch plate holder (41), one end of the pivoting latch plate (42) extending below the pivoting latch plate cavity (411) and forming an upper connector hinge screw action cavity (422) at a position corresponding to the end of the upper connector hinge screw shaft (6311) extending beyond the screw shaft limiting nut (63111), the upper hinge screw shaft (6311) extending beyond the screw shaft limiting nut (63111) and the screw action cavity of the connector hinge screw (422), the upper hinge screw shaft (6311) extending beyond the screw shaft limiting nut (63111) and the screw action cavity The lever shaft action cavity (422) is matched or disengaged, one end of a return spring (43) is hung on a first return spring shaft I (431), the other end of the return spring (43) is hung on a second return spring shaft II (432), the first return spring shaft I (431) is fixed on the pivoting lock plate seat (41), the second return spring shaft II (432) is fixed on the other end of the pivoting lock plate (42), a pivoting lock plate anti-overturning stop pin (44) is fixed on the pivoting lock plate seat (41) at a position corresponding to the pivoting lock plate (42), and the middle part of the pivoting lock plate anti-overturning stop pin (44) is also corresponding to the pivoting lock plate cavity (411); a wheelchair folding manual operation lever (45) is connected between the pivoting latch plates (42) of a pair of folding operation mechanisms (4).

9. The safety wheelchair as claimed in claim 1, wherein a seat frame hinge seat (21) is fixed to each side of the seat back frame (2), a seat frame hinge joint (12) is formed at the rear end of the seat base (1), and the seat frame hinge joint (12) is hinged to the seat frame hinge seat (21) by a seat frame hinge joint pin (121); a foot support hinged seat (22) is respectively fixed at the two sides of the chair back frame (2) and at the position below the chair seat frame hinged seat (21), a foot support hinged joint (31) is formed at the rear end of the two sides of the foot support (3), the foot support hinged joint (31) is hinged with the foot support hinged seat (22) through a foot support hinged joint pin shaft (311), a front wheel seat connecting arm (32) is fixed at the front end of the foot support (3), the front wheel seat connecting arm (32) is hinged with the middle part of the front wheel seat (15) through a front wheel seat connecting arm hinged shaft (321), and the upper end of the front wheel seat (15) is hinged with a chair seat frame hinged joint seat (16) fixed at the front end of the chair seat frame (1) through a front wheel seat hinged joint (152); a rear wheel frame supporting pipe (52) is fixed between the front ends of the pair of rear wheel frames (5), and one ends of the pair of rear wheel frames (5) facing the chair seat frame (1) are respectively hinged with the chair seat frame (1) through rear wheel frame hinging seats (53); a chair seat frame front supporting pipe (13) is fixed between the front parts of the two sides of the chair seat frame (1).

10. A safety wheelchair as claimed in claim 1, characterized in that a handrail frame hinge seat (14) is fixed to each side of the rear end of the seat frame (1), a handrail frame (141) is hinged to a position corresponding to the handrail frame hinge seat (14), a handrail (1411) is hinged to the upper portion of the handrail frame (141), and one end of the handrail (1411) facing the seat back frame (2) is connected to the seat back frame (2) through a handrail connecting seat (14111).