CN113558884B - Wheelchair with chair back and armrests acting cooperatively and working method thereof - Google Patents
Wheelchair with chair back and armrests acting cooperatively and working method thereof Download PDFInfo
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- CN113558884B CN113558884B CN202110819902.8A CN202110819902A CN113558884B CN 113558884 B CN113558884 B CN 113558884B CN 202110819902 A CN202110819902 A CN 202110819902A CN 113558884 B CN113558884 B CN 113558884B
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- armrest
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 230000009471 action Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 description 7
- 230000000875 corresponding effect Effects 0.000 description 4
- 241000190070 Sarracenia purpurea Species 0.000 description 2
- 210000001217 buttock Anatomy 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000002414 leg Anatomy 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002079 cooperative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/10—Parts, details or accessories
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/10—Parts, details or accessories
- A61G5/1056—Arrangements for adjusting the seat
- A61G5/1067—Arrangements for adjusting the seat adjusting the backrest relative to the seat portion
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/10—Parts, details or accessories
- A61G5/12—Rests specially adapted therefor, e.g. for the head or the feet
- A61G5/125—Rests specially adapted therefor, e.g. for the head or the feet for arms
Abstract
The invention relates to a wheelchair with a chair back and armrests which act cooperatively and a working method thereof, which comprises a vehicle body frame and is characterized in that: the vehicle body frame is provided with a connecting bracket, the connecting bracket is provided with a backrest assembly, the backrest assembly is rotationally connected with the connecting bracket through a rotating assembly, and a rotating disc on the rotating assembly is connected with a rotating pair of the armrest assembly so that the rotating pair synchronously rotates when the rotating disc rotates; the swing pair is characterized in that a hinge shaft is connected to the rotating pair in a rotating mode, an armrest is connected to the first side portion of the hinge shaft in a limiting rotating mode, a first connecting rod with adjustable length is further connected to the vehicle body frame in a hinged mode, the free end of the first connecting rod is hinged to a swing arm arranged on the second side portion of the hinge shaft, and the first connecting rod and the swing arm form a connecting rod crank mechanism to enable the first connecting rod to drive the hinge shaft and the armrest to swing reversely. The wheelchair with the chair back and the armrests in cooperation can achieve optimal use comfort.
Description
Technical field:
the invention relates to a wheelchair with a chair back and armrests which act cooperatively and a working method thereof.
The background technology is as follows:
with the progress and development of society, more and more disabled people want to return to society to perform normal study, work and life; the electric wheelchair is suitable for the aged and the weak with disabled lower limbs and inconvenient walking, and has the characteristics of large moving range, multiple applicable people, powerful functions and the like compared with a manual wheelchair, a nursing bed and the like.
However, most of the existing electric wheelchairs only have a simple sitting and leaning function or can only manually adjust the angle of the backrest, so that a user cannot independently adjust the sitting posture of the user. In addition, in the prior art, the position of the armrest is not reasonably adjusted in the process of putting the chair back of the electric wheelchair, or the position of the armrest is not changed, or the position of the armrest is the same as the swinging angle of the chair back, so that people can use the electric wheelchair uncomfortable.
The invention comprises the following steps:
the invention aims to provide a wheelchair with a chair back and armrests which can realize optimal use comfort and a working method thereof.
The technical scheme of the invention is as follows: the utility model provides a wheelchair of back of chair and handrail collaborative action, includes car body frame, its characterized in that: the vehicle body frame is provided with a connecting bracket, the connecting bracket is provided with a backrest assembly, the backrest assembly is rotationally connected with the connecting bracket through a rotating assembly, and a rotating disc on the rotating assembly is connected with a rotating pair of the armrest assembly so that the rotating pair synchronously rotates when the rotating disc rotates; the swing pair is characterized in that a hinge shaft is connected to the rotating pair in a rotating mode, an armrest is connected to the first side portion of the hinge shaft in a limiting rotating mode, a first connecting rod with adjustable length is further connected to the vehicle body frame in a hinged mode, the free end of the first connecting rod is hinged to a swing arm arranged on the second side portion of the hinge shaft, and the first connecting rod and the swing arm form a connecting rod crank mechanism to enable the first connecting rod to drive the hinge shaft and the armrest to swing reversely.
Further, the rotating assembly comprises a rotating shaft erected on the connecting support, a driving motor for driving the rotating shaft to rotate is arranged on the side part of the rotating shaft, a fixed disc capable of rotating relatively and a core disc of the rotating disc are arranged at two ends of the rotating shaft, and the rotating disc of the core disc and the rotating shaft are sleeved to form an integral rotation; the fixed disk of the core disk is fixedly connected with two side wing plates of the connecting support, the rotating disk of the core disk is fixedly connected with the limiting plate, the backrest assembly is fixedly connected with the limiting plate, and the driving motor is fixedly connected to the limiting plate.
Further, a plurality of first protruding blocks are arranged on one surface of the fixed disc, which is opposite to the two wing plates of the connecting support, a plurality of first grooves corresponding to the first protruding blocks are arranged on the connecting support, a plurality of second protruding blocks are arranged on one surface of the rotating disc, which is opposite to the limiting plate, a plurality of second grooves corresponding to the second protruding blocks are arranged on the limiting plate, the rotating shaft is fixedly connected with the central hole of the rotating disc, and the rotating shaft is in hollow sleeve with the central holes of the fixed disc and the wing plates.
Further, the armrest is connected with a positioning ring, and a plurality of notches for limiting are arranged on the positioning ring.
Further, a limit ring is fixedly sleeved on the hinge shaft, and a stop block matched with the notch is arranged on the limit ring.
Further, the positioning ring comprises a disc body, a central round hole arranged on the disc body and a plurality of perforations uniformly distributed on the disc body, wherein the central round hole is sleeved on a bearing positioned on a hinge shaft, and the perforations are in locking connection with the armrests through bolts; the notch is arranged on the periphery of the positioning ring and comprises three independent semicircular groove notches and a long groove with a circumferential angle of 90-150 degrees.
Further, the side portion of the limiting plate is connected with the first end of the flange shaft, the second end of the flange shaft is connected with the end plate, the end plate is connected with the cover body, the revolute pair comprises the flange shaft, the end plate and the cover body, a guide groove is formed in the cover body, a sliding wheel is arranged in the guide groove in a sliding mode, an elastic piece for pushing the sliding wheel is arranged in the cover body, and the notch is limited in cooperation with the sliding wheel.
Further, the backrest cushion is arranged on the backrest assembly in a sliding manner, a linkage driving device is arranged between the backrest cushion and the connecting support, when the backrest assembly rotates, the backrest cushion slides up and down along with the angle change of the backrest assembly, the backrest assembly comprises a support strip fixed on a limiting plate, an L-shaped adapter plate is arranged on the support strip, sliding rails are arranged on the adapter plate, sliding chain links are arranged in the sliding rails, a mounting plate is erected between the sliding chain links, and the backrest cushion is arranged on the front side of the mounting plate.
Furthermore, a cover shell is also erected between the two adapter plates, the cover shell and the mounting plate form an adjusting bin, and a backrest cushion positioning assembly is also arranged in the adjusting bin; the backrest cushion positioning assembly comprises a rack arranged at the rear side of the mounting plate, a rotating knob is arranged on the housing, an adjusting gear is arranged at one end, close to the backrest cushion, of the rotating knob, and the adjusting gear is meshed with the rack; the housing is provided with a fixed ring, a bearing is arranged in the fixed ring, and the rotary knob is fixedly connected with the inner ring of the bearing; the linkage driving device comprises a rotating handle, the rotating handle is fixedly connected with one end of the rotating handle, which is far away from the backrest cushion, the tail end of the rotating handle is hinged with a universal joint ball head connecting rod, and the other end of the universal joint ball head connecting rod is hinged with a connecting bracket; the universal joint ball head connecting rod comprises two connecting rod ball heads and a connecting rod, wherein one connecting rod ball head is connected with the connecting rod through an orthodontic thread, the other connecting rod ball head is connected with the connecting rod through a counter thread, and anti-slip lines are arranged on the outer surface of the connecting rod.
The invention relates to a working method of a wheelchair with a chair back and armrests which cooperatively act, which is characterized by comprising the following steps: when the angle of the backrest assembly is adjusted, the rotating disk on the rotating assembly drives the revolute pair, the armrest assembly and the armrest to rotate along with the revolute pair, and when the armrest is rotated to a certain angle, the armrest is driven by the first connecting rod and the swing arm to not swing along with the backrest assembly any more, but the hinge shaft and the armrest swing reversely.
If the wheelchair is not provided with the structures such as the first connecting rod, the swing arm and the like, the armrest can continuously swing along with the chair back, namely, after the chair back swings from the vertical position to the horizontal position, the armrest swings from the horizontal position to vertically upwards, and the wheelchair is very inconvenient and uncomfortable for a lying person to use, and can enable articles (such as water of a water cup and the like) placed on the armrest to overflow and fall easily; because of the arrangement of the first connecting rod and the swing arm with adjustable length, the first connecting rod and the swing arm form a connecting rod crank mechanism, when the chair back and the armrest rotate to a certain angle, the armrest is driven by the first connecting rod and the swing arm, so that the armrest does not swing along with the backrest assembly any more, but the hinge shaft and the armrest swing reversely, and the optimal use comfort of a user is realized.
Description of the drawings:
FIG. 1 is a schematic perspective view of a first view of the present invention;
FIG. 2 is a schematic perspective view of a second view of the present invention;
FIG. 3 is a schematic view of a third perspective view of a three-dimensional part structure of the present invention;
FIG. 4 is a schematic view of the partial construction of FIG. 2;
FIG. 5 is a schematic view of the partial construction of FIG. 1;
FIG. 6 is a schematic cross-sectional view of the plane of the axis of the overaxle and the hinge axle;
FIG. 7 is a schematic perspective view of a core plate;
FIG. 8 is a schematic perspective view of a connecting bracket;
FIG. 9 is a schematic perspective view of a limiting plate;
FIG. 10 is a front view of the retainer ring;
fig. 11 is a schematic perspective view of a left-view configuration (upper and lower side sitting state) of the embodiment of the present invention;
FIG. 12 is a schematic perspective view of a left-hand configuration (sitting position) of an embodiment of the invention;
fig. 13 is a schematic perspective view of a left-view configuration (prone position state) of the embodiment of the present invention;
fig. 14 is a schematic perspective view of a left-view configuration (lying state) of the embodiment of the present invention.
The specific embodiment is as follows:
in order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.
The wheelchair with the cooperative action of the chair back and the armrests comprises a vehicle body frame 1, wherein a connecting bracket 2 is arranged on the vehicle body frame, a backrest assembly 3 is arranged on the connecting bracket 2, the backrest assembly 3 is rotationally connected with the connecting bracket 2 through a rotating assembly 4, and a rotating disc 5 on the rotating assembly 4 is connected with a rotating pair 7 of an armrests assembly 6 so that the rotating pair 7 synchronously rotates when the rotating disc 5 rotates.
The rotating assembly 4 comprises a rotating shaft 12 erected on a connecting support, a driving motor 13 for driving the rotating shaft to rotate is arranged on the side part of the rotating shaft 12, a fixed disc 15 capable of rotating relatively and a core disc 16 of the rotating disc 5 are arranged at two ends of the rotating shaft 12, and the resistance of the fixed disc 15 and the rotating disc 5 to rotate relatively is large, so that the back of a user leans against a chair back, the rotating disc of the core disc and the rotating shaft are in sleeve joint to form integral rotation, the rotating disc is driven to rotate relative to the fixed disc under the action of the driving motor driving action rotating shaft, the core disc 16 is commercially available on the market and is usually applied to an automobile seat, and the core disc can automatically lock a safety function from a motion stop position to any position point when the core disc is capable of moving.
The fixed disk 15 of the core disk is fixedly connected with wing plates 17 on two sides of the connecting bracket 2, the rotating disk 5 of the core disk is fixedly connected with a limiting plate 18, the backrest assembly 3 is fixedly connected with the limiting plate 18, and the driving motor is fixedly connected to the limiting plate 18.
The driving motor comprises a motor and a turning speed-changing gear driven by an output shaft of the motor, the turning speed-changing gear is meshed with a driving sleeve on the periphery of a rotating shaft to rotate, the section of the rotating shaft is matched with an inner hole of the rotating sleeve through a key slot (for enabling a driving effect to be better, the rotating shaft is a spline shaft), the rotating shaft is rotated, and the driving motor and the rotating shaft can be purchased in the market.
The revolute pair 7 is rotatably connected with a hinge shaft 8, the revolute pair 7 comprises a flange shaft 33, an end plate 35 and a cover 34, one side part of the end plate is fixedly connected with the end part of the flange shaft, and the hinge shaft 8 is rotatably hinged to the other side part of the end plate.
The handrail 9 is connected to the limiting rotation on the first side portion of the hinge shaft 8, the limiting rotation of the handrail 9 is that the handrail 9 is hinged to the hinge shaft in a rotating mode, the handrail is not limited by any angle, a certain rotation angle is limited, the limiting rotation angle can be limited by a limiting nail, a limiting protruding pin and the like, and the follow-up description adopts a specific structure to limit.
The automobile body frame 1 is also hinged with a first connecting rod 10 with adjustable length, the free end of the first connecting rod 10 is hinged with a swing arm 11 arranged on the second side part of the hinge shaft 8, the first connecting rod 10 and the swing arm 11 form a connecting rod crank mechanism, so that the first connecting rod drives the hinge shaft and the armrests to swing reversely, the back, the buttocks and the legs are most comfortable to use when the back is inclined from the vertical position to the lying position, and the first connecting rod also plays a role of swinging the swing arms along with rotation, so that the armrests are most comfortable to use when the back is swung to the flat position, but are limited by the first connecting rod and the swing arms, the swing process of the armrests is firstly from the horizontal position (the first connecting rod can be adjusted between 10 degrees and 50 degrees), then falls to the horizontal position, the first connecting rod is repeatedly applicable to the user, the chair is inclined to the vertical position by 20 degrees to 45 degrees, the back, the buttocks and the legs are most comfortable to use when the back is inclined to 15 degrees to 36 degrees to the back, and the arms and the back are most comfortable to use (as shown in the figure 13), and the first connecting rod is not easy to use, and the first connecting rod is easy to raise the quality to the armrests through the first connecting rod, and the first connecting rod is easy to use and the additional to improve the quality of the wheelchair if the arm is more comfortable to use.
Further, in order to achieve good fixation, a plurality of first protruding blocks 19 are arranged on the opposite side of the fixing disc 15 to the two wing plates 17 of the connecting support, a plurality of first grooves 20 corresponding to the first protruding blocks 19 are arranged on the connecting support, a plurality of second protruding blocks 21 are arranged on the opposite side of the rotating disc to the limiting plate, a plurality of second grooves 22 corresponding to the second protruding blocks are arranged on the limiting plate, and the second protruding blocks 21 are welded and fixed with the first grooves 20 through the first protruding blocks 19, so that the power of the rotating shaft can be well transmitted to the chair back, the rotating shaft is fixedly connected with the central holes of the rotating disc, and the rotating shaft is sleeved with the central holes of the fixing disc and the wing plates.
Further, in order to realize the preferred limit rotation of the armrest 9, a positioning ring 23 is connected to the armrest, and a plurality of notches 24 for limiting are arranged on the positioning ring; a limit ring 25 is sleeved and fixed on the hinge shaft (namely, the limit ring 25 and the hinge shaft can synchronously rotate), and a stop block 26 matched with the notch is arranged on the limit ring 25; the positioning ring 23 comprises a disc body, a central round hole 27 arranged on the disc body and a plurality of perforations 28 uniformly distributed on the disc body, wherein the central round hole is sleeved on a bearing 29 positioned on the hinge shaft, and the perforations are in locking connection with the handrail through bolts, so that the handrail can synchronously rotate with the positioning ring; the notch is arranged on the periphery of the positioning ring, the notch comprises three independent semicircular notch 31 and a long groove 32 with a circumferential angle of 90-150 degrees, the limiting ring 25 and the stop block 26 thereof are matched with the long groove 32, and the matching with the first connecting rod and the swing arm is realized to drive the handrail to realize the action (lifting a certain angle and then leveling).
Further, the side portion of the limiting plate is connected to the first end of the flange shaft 33, the second end of the flange shaft is connected to the end plate 35, the end plate is connected to the cover 34, the revolute pair 7 includes the flange shaft 33, the end plate 35 and the cover 34, a guide groove 36 is provided in the cover, a sliding wheel 37 is slidably provided in the guide groove, an elastic member (the elastic member may be a spring or an elastic rubber block) for pushing the sliding wheel is provided in the cover, the notch 24 is limited by matching with the sliding wheel 37, an adjusting bolt for pushing the elastic member is provided at the bottom of the cover, and the notch 24 is limited by matching with the sliding wheel 37 through the jacking effect of the elastic member on the sliding wheel 37, so that the armrest can be positioned in the first position.
If the wheelchair is not provided with the structures such as the first connecting rod, the swing arm and the like, the armrest can continuously swing along with the chair back, namely, after the chair back swings from the vertical position to the horizontal position, the armrest swings from the horizontal position to vertically upwards, and the wheelchair is very inconvenient and uncomfortable for a lying person to use, and can enable articles (such as water of a water cup and the like) placed on the armrest to overflow and fall easily; because of the arrangement of the first connecting rod and the swing arm with adjustable length, the first connecting rod and the swing arm form a connecting rod crank mechanism, when the chair back and the armrest rotate to a certain angle, the armrest is driven by the first connecting rod and the swing arm, so that the armrest does not swing along with the backrest assembly any more, but the hinge shaft and the armrest swing reversely, and the optimal use comfort of a user is realized.
When in a sitting posture state, the left handrail and the right handrail can be simultaneously opened to be pulled upwards and turned over to be aligned with the backrest when the vehicle gets on or off from the side, so that the vehicle gets on or off conveniently and has a safer sense of position.
When the device works, in the process of sitting to lying, the driving motor rotates the backrest backwards to lie, the rotating shaft is driven by the driving motor to rotate, the rotating shaft drives the rotating disc with the core disc connected with the two ends and the limiting plate to rotate, the limiting plate fixes the backrest assembly, and the backrest assembly and the limiting plate are connected with the revolute pair to realize synchronous rotation of the revolute pair; the back is rotated backward by the driving motor to lie down at ordinary times, a first connecting rod (a universal joint ball head connecting rod) is fixedly arranged on the vehicle body frame, the other end of the first connecting rod is hinged with the swing arm, the back is laid down in a lying process, the first connecting rod and the swing arm drive the armrest to act, and the armrest is cooperatively produced in two aspects.
In this embodiment, a linkage driving device is arranged between a backrest cushion and a connecting bracket on the backrest assembly 3, when the backrest assembly rotates, the backrest cushion moves up and down along with the angle change of the backrest assembly, the backrest assembly comprises a bracket strip 39 fixed on a limiting plate 18, two limiting plates are respectively provided with a bracket strip, the two bracket strips are correspondingly arranged, the bracket strips are provided with an L-shaped adapter plate, the adapter plates 40 are respectively provided with a sliding rail 41, sliding links 42 are arranged in the sliding rails, the sliding links freely slide in the sliding rails, a mounting plate 43 is arranged between the sliding links, a housing 44 is arranged between the two adapter plates, the housing and the mounting plate form an adjusting bin, and the backrest cushion positioning assembly is also arranged in the adjusting bin; the back cushion is disposed at the front side of the mounting plate, and by this structure, the back cushion can slide up and down on the slide rail, that is, the back cushion slides up and down relative to the cover case 44 connected to the limiting plate.
In this embodiment, the back cushion positioning assembly includes a rack 45 disposed at the rear side of the mounting plate 43, the rack is vertically disposed, a rotary knob (rotary rod body) is disposed on the housing, the rotary knob is rotationally connected with the housing, an adjusting gear 47 is disposed on a side of the rotary knob, which is close to the back cushion, and the adjusting gear is meshed with the rack, and the position of the mounting plate is adjusted by adjusting the meshing position of the gear and the rack, so that the position of the back cushion is adjusted.
In this embodiment, in order to realize the rotational connection between the rotation knob and the housing, a fixing ring 48 is fixedly arranged on the housing, a bearing is arranged in the fixing ring, and the rotation knob is fixedly connected with the inner ring of the bearing, that is, the rotation knob can rotate relative to the housing.
In this embodiment, the linkage driving device includes a rotating handle 49, the rotating handle 49 is fixedly connected with one end of the rotating handle far away from the backrest cushion, the rotating handle can drive the rotating handle to rotate through rotation, and then the adjusting gear 47 is rotated, and further lifting of the rack is achieved, so that position adjustment of the backrest cushion is achieved, the tail end of the rotating handle 49 is hinged with a universal joint ball head connecting rod 50, and the other end of the universal joint ball head connecting rod is hinged with the connecting bracket 2.
In this embodiment, in the process of moving the seat back from the upright position to the lying position, the backrest cushion moves toward the seat cushion, and as the user with inconvenient movement has little strength on the back or sore on the back, the backrest cushion moves toward the seat cushion through the reclining process of the seat back, thereby reducing the friction between the back of the user and the seat back.
In this embodiment, universal joint ball head connecting rod includes two connecting rod bulb and a connecting rod, and one of them connecting rod bulb passes through positive tooth threaded connection with the connecting rod, and another connecting rod bulb passes through reverse tooth threaded connection with the connecting rod, can set up locknut for avoiding becoming flexible, the surface of connecting rod is provided with anti-skidding line, when needs adjust the wheelchair to when adapting to different users, can realize the initial adjustment to the back pad position through rotating the connecting rod, after once adjusting, need not adjust once more, first connecting rod structure also like this universal joint ball head connecting rod.
When the chair back angle adjustment mechanism works, when the chair back angle adjustment mechanism needs to adjust the chair back angle, the driving motor drives the rotating shaft to rotate, and the rotating shaft drives the limiting plate and the bracket strip to rotate, so that the mounting plate, the housing and the backrest cushion rotate together; because the angle and the position of the housing are changed, the distance between the rotating handle and the connecting bracket is also changed, and because of the action of the universal joint ball head connecting rod, the rotating handle starts to rotate, so that the rotating knob rotates, and further the adjusting gear rotates, the lifting of the rack is realized, the position of the backrest cushion is adjusted, and the waist and the back are all leaned against the backrest cushion in the whole conversion process of a user without additional adjustment.
The above description is only of the preferred embodiments of the present invention, and it is therefore apparent to those skilled in the art that, according to the teachings of the present invention, the wheelchair and its working method, which are designed to cooperate with the back and the armrests of different forms, do not require any inventive effort, and all equivalent changes, modifications, substitutions and alterations herein will be made without departing from the spirit and scope of the invention.
Claims (5)
1. The utility model provides a wheelchair of back of chair and handrail collaborative action, includes car body frame, its characterized in that: the vehicle body frame is provided with a connecting bracket, the connecting bracket is provided with a backrest assembly, the backrest assembly is rotationally connected with the connecting bracket through a rotating assembly, and a rotating disc on the rotating assembly is connected with a rotating pair of the armrest assembly so that the rotating pair synchronously rotates when the rotating disc rotates; the hinge assembly comprises a revolute pair, a first side part of the revolute pair is rotatably connected with a hinge shaft, a first side part of the hinge shaft is limited and rotatably connected with a handrail, a first connecting rod with adjustable length is also hinged on the vehicle body frame, the free end of the first connecting rod is hinged with a swing arm arranged on a second side part of the hinge shaft, and the first connecting rod and the swing arm form a connecting rod crank mechanism so that the first connecting rod drives the hinge shaft and the handrail to swing reversely; the rotating assembly comprises a rotating shaft erected on the connecting support, a driving motor for driving the rotating shaft to rotate is arranged on the side part of the rotating shaft, a fixed disc capable of rotating relatively and a core disc of the rotating disc are arranged at two ends of the rotating shaft, and the rotating disc of the core disc and the rotating shaft are sleeved to form an integral rotation; the fixed disc of the core disc is fixedly connected with wing plates at two sides of the connecting bracket, the rotating disc of the core disc is fixedly connected with the limiting plate, the backrest assembly is fixedly connected with the limiting plate, and the driving motor is fixedly connected to the limiting plate; the handrail is connected with a positioning ring, and a plurality of notches for limiting are formed in the positioning ring; a limit ring is fixedly sleeved on the hinge shaft, and a stop block matched with the notch is arranged on the limit ring; the positioning ring comprises a disc body, a central round hole arranged on the disc body and a plurality of perforations uniformly distributed on the disc body, the central round hole is sleeved on a bearing positioned on the hinge shaft, and the perforations are in locking connection with the armrests through bolts; the notch is arranged on the periphery of the positioning ring and comprises three independent semicircular groove openings and a long groove with a circumferential angle of 90-150 degrees; the limiting plate lateral part is connected with the first end of the flange shaft, the second end of the flange shaft is connected with the end plate, the end plate is connected with the cover body, the revolute pair comprises the flange shaft, the end plate and the cover body, a guide groove is arranged in the cover body, a sliding wheel is arranged in the guide groove in a sliding mode, an elastic piece for pushing the sliding wheel is arranged in the cover body, and the notch is limited by being matched with the sliding wheel.
2. The wheelchair of claim 1 wherein the chair back cooperates with the armrests: the fixed disk is provided with a plurality of first lugs on the opposite one side of fixed disk and linking bridge both wings board, be provided with a plurality of first recesses that correspond with first lug on the linking bridge, be provided with a plurality of second lugs on the opposite one side of rotating disk and limiting plate, be provided with a plurality of second recesses that correspond with the second lug on the limiting plate, the pivot links firmly with the centre bore of rotating disk, the pivot is empty with the centre bore cover of fixed disk and pterygoid lamina.
3. The wheelchair of claim 1 wherein the chair back cooperates with the armrests: the back assembly is provided with a back cushion in a sliding manner, a linkage driving device is arranged between the back cushion and the connecting support, when the back assembly rotates, the back cushion slides up and down along with the angle change of the back assembly, the back assembly comprises a support strip fixed on a limiting plate, an L-shaped adapter plate is arranged on the support strip, sliding rails are arranged on the adapter plate, sliding chain links are arranged in the sliding rails, a mounting plate is arranged between the sliding chain links, and the back cushion is arranged on the front side of the mounting plate.
4. A wheelchair in which the back of the chair cooperates with armrests as claimed in claim 3, wherein: a housing is also erected between the two adapter plates, the housing and the mounting plate form an adjusting bin, and a backrest cushion positioning assembly is also arranged in the adjusting bin; the backrest cushion positioning assembly comprises a rack arranged at the rear side of the mounting plate, a rotating button is arranged on the housing, an adjusting gear is arranged at one end, close to the backrest cushion, of the rotating button, and the adjusting gear is meshed with the rack; the shell is provided with a fixed ring, a bearing is arranged in the fixed ring, and the rotating button is fixedly connected with the inner ring of the bearing; the linkage driving device comprises a rotating handle, the rotating handle is fixedly connected with one end of the rotating button, which is far away from the backrest cushion, the tail end of the rotating handle is hinged with a universal joint ball head connecting rod, and the other end of the universal joint ball head connecting rod is hinged with a connecting bracket; the universal joint ball head connecting rod comprises two connecting rod ball heads and a connecting rod, wherein one connecting rod ball head is connected with the connecting rod through an orthodontic thread, the other connecting rod ball head is connected with the connecting rod through a counter thread, and anti-slip lines are arranged on the outer surface of the connecting rod.
5. A method of operating a wheelchair in which a seat back and armrests cooperate as claimed in any one of claims 1 to 4, wherein: when the angle of the backrest assembly is adjusted, the rotating disk on the rotating assembly drives the revolute pair, the armrest assembly and the armrest to rotate along with the revolute pair, and when the armrest is rotated to a certain angle, the armrest is driven by the first connecting rod and the swing arm to not swing along with the backrest assembly any more, but the hinge shaft and the armrest swing reversely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110819902.8A CN113558884B (en) | 2021-07-20 | 2021-07-20 | Wheelchair with chair back and armrests acting cooperatively and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110819902.8A CN113558884B (en) | 2021-07-20 | 2021-07-20 | Wheelchair with chair back and armrests acting cooperatively and working method thereof |
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| Publication Number | Publication Date |
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| CN113558884A CN113558884A (en) | 2021-10-29 |
| CN113558884B true CN113558884B (en) | 2023-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110819902.8A Active CN113558884B (en) | 2021-07-20 | 2021-07-20 | Wheelchair with chair back and armrests acting cooperatively and working method thereof |
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| US6425635B1 (en) * | 1999-11-01 | 2002-07-30 | Invacare Corporation | Weight-shifting reclining and tilting wheelchair seat |
| EP3603597A1 (en) * | 2018-07-31 | 2020-02-05 | Meyra GmbH | Electric wheelchair with alignment function |
| CN210903721U (en) * | 2019-07-25 | 2020-07-03 | 洪辉 | Wheel chair |
| CN112168519A (en) * | 2020-11-20 | 2021-01-05 | 河南奕恒医疗器械有限公司 | Multi-shaft driving self-adaptive wheelchair |
| CN212788916U (en) * | 2020-06-04 | 2021-03-26 | 深圳市湘聚实业有限公司 | Wheelchair bed |
| CN213666232U (en) * | 2020-11-20 | 2021-07-13 | 河南奕恒医疗器械有限公司 | Wheelchair self-adaptive combined adjusting backrest armrest system |
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2021
- 2021-07-20 CN CN202110819902.8A patent/CN113558884B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6425635B1 (en) * | 1999-11-01 | 2002-07-30 | Invacare Corporation | Weight-shifting reclining and tilting wheelchair seat |
| EP3603597A1 (en) * | 2018-07-31 | 2020-02-05 | Meyra GmbH | Electric wheelchair with alignment function |
| CN210903721U (en) * | 2019-07-25 | 2020-07-03 | 洪辉 | Wheel chair |
| CN212788916U (en) * | 2020-06-04 | 2021-03-26 | 深圳市湘聚实业有限公司 | Wheelchair bed |
| CN112168519A (en) * | 2020-11-20 | 2021-01-05 | 河南奕恒医疗器械有限公司 | Multi-shaft driving self-adaptive wheelchair |
| CN213666232U (en) * | 2020-11-20 | 2021-07-13 | 河南奕恒医疗器械有限公司 | Wheelchair self-adaptive combined adjusting backrest armrest system |
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|---|---|
| CN113558884A (en) | 2021-10-29 |
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