CN110859711A - Wheelchair for helping old people to stand - Google Patents
Wheelchair for helping old people to stand Download PDFInfo
- Publication number
- CN110859711A CN110859711A CN201911162739.1A CN201911162739A CN110859711A CN 110859711 A CN110859711 A CN 110859711A CN 201911162739 A CN201911162739 A CN 201911162739A CN 110859711 A CN110859711 A CN 110859711A
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- chair frame
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- supporting
- hinged
- top plate
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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
-
- 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
- A61G5/128—Rests specially adapted therefor, e.g. for the head or the feet for feet
-
- 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
- A61G5/14—Standing-up or sitting-down aids
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Special Chairs (AREA)
Abstract
The invention relates to an assistant standing wheelchair for the aged, which comprises a chair frame, assistant supporting mechanisms and pedal assistant mechanisms, wherein the assistant supporting mechanisms and the pedal assistant mechanisms are arranged on the left side and the right side of the chair frame, the assistant supporting mechanisms are arranged at the positions of armrests on the two sides of the chair frame and are positioned at the inner sides of corresponding guide rails, the assistant supporting mechanisms comprise a bottom plate, an upper supporting arm, a lower supporting arm, a top plate, a driving block and a double-head screw motor, the pedal assistant mechanisms are arranged at the positions where legs on the two sides of the front end of the chair frame are placed, the assistant supporting mechanisms comprise a swinging rod, a pedal plate, a leg guard plate and an electric push rod, when the aged sit on a supporting seat plate, when the aged want to stand and leave the wheelchair, the motor is started by the hand-held top plate, the motor rotates to enable the two driving blocks to contract towards the middle to enable the top plate to rise, the top plate, convenient, practical, safe and reliable.
Description
Technical Field
The invention relates to the technical field of wheelchairs, in particular to an auxiliary standing wheelchair for the old.
Background
According to statistics, due to various traffic accidents, natural disasters, accidents and various diseases, thousands of people lose walking ability every year, more than three hundred and ten thousand hemiplegic patients exist in China, the aging degree of the society is continuously improved, and many elderly people who are old need to use wheelchairs, so that the number of the elderly and disabled people who use wheelchairs is very large, and under the normal condition, the elderly and disabled people need to accompany with a family and a caregiver to complete daily living, or people with better conditions need to move by means of the wheelchairs. However, for the elderly who take wheelchairs, the elderly are in a sitting posture for a long time, and the elderly are easy to suffer from leg muscle atrophy due to lack of standing and walking exercises for a long time, and are not good for the health of the elderly, so that the wheelchair is used as a tool for riding instead of walk for the old with inconvenient actions, and the old needs to get up to get rid of the wheelchair to perform proper physical activities in due time, meanwhile, when the old needs to have a rest, go to the toilet and other necessary physiological activities, the old needs to get up and leave the wheelchair, because the old people have inconvenient hands and feet and weak legs, the old people are difficult to get up and leave the wheelchair independently and have certain safety risk, the old people usually need to get up and stand to leave the wheelchair with the assistance of other people, however, the old people cannot always have people at all times, and the old people need to be assisted by others and are inconvenient finally, so that the old people need to start with the wheelchair, and a wheelchair which can assist the old people to get up and stand by the structure of the wheelchair is urgently needed.
Disclosure of Invention
In order to solve the problems, the invention provides an auxiliary standing wheelchair for the old.
The specific contents are as follows: help the supplementary wheelchair of standing of old age, this wheelchair include the chair frame, install supplementary supporting mechanism and pedal complementary unit in the chair frame left and right sides, characterized by:
the chair frame is a frame in the form of a chair formed by connecting a plurality of metal rods end to end, the front end of the bottom of the chair frame is provided with bilateral universal front wheels, the rear end of the bottom of the chair frame is provided with bilateral driving rear wheels, the positions of handrails at two sides of the chair frame are provided with bilateral guide rails, the guide rails are two arc-shaped strips arranged in parallel, the opposite surfaces of the two arc-shaped strips are provided with clamping grooves, and the upper ends of the guide rails are gradually bent downwards from bottom to top after the front ends and the lower ends are arranged;
the auxiliary supporting mechanism is arranged at the positions of armrests at the two sides of the chair frame and is positioned at the inner side of the corresponding guide rail, the mechanism comprises a bottom plate, an upper supporting arm, a lower supporting arm, a top plate, driving blocks and a double-head screw motor, the bottom plate is hinged on a support on the chair frame, symmetrical lower supporting arms are hinged on the bottom plate and positioned at the front side and the rear side of the support, the upper ends of two lower limbs are respectively hinged with the lower ends of the two driving blocks, the upper ends of the two driving blocks are respectively hinged with the upper supporting arm, the upper ends of the two upper supporting arms are respectively hinged on the top plate, wherein the bottom plate, the two lower supporting arms, the driving blocks, the two upper supporting arms and the top plate form an octagon which is symmetrical up and down and front and rear, two screw shafts of the double-head screw motor are respectively connected with the two driving blocks to form screw rod nut transmission, a driving roller is fixed on the outer side surface of the double-head screw motor through a revolute pair, the driving roller is clamped in a clamping groove between two arc-shaped strips of the guide rail, a supporting seat plate is further mounted on the chair frame, two sides of the front end of the supporting seat plate are coaxially hinged on the chair frame, linkage pull rods are symmetrically hinged on two sides of the rear end of the supporting seat plate, and the upper end of each linkage pull rod is hinged with a top plate on the corresponding side;
the pedal auxiliary mechanism is arranged at the positions where legs at two sides of the front end of the chair frame are placed and comprises a swinging rod, a pedal plate, a leg guard plate and an electric push rod, the upper end of the swinging rod is hinged on a fixed cantilever horizontally extending out of the front end of the chair frame, the pedal plate extending towards the inner side is fixed at the lowest end of the swinging rod, the cross section of the leg guard plate is L-shaped, one long edge of the leg guard plate is sleeved on the swinging rod through a revolute pair and freely rotates around the swinging rod, a gear sleeved on the swinging rod is fixed at the upper end of the leg guard plate, a rack with teeth on the side surface and correspondingly matched with the gear is fixed on the chair frame, the outer end of the rack is an upward-raised arc shape, the arc shape is consistent with the swinging radian of the gear along with the swinging rod, the rack and the gear are meshed to form gear-rack transmission, one end of the electric push rod is hinged on the chair frame, the swing rod and the electric push rod swing in the same vertical plane.
Preferably, all articulated arm backup pad on the roof of supplementary supporting mechanism, the middle part and the roof of arm backup pad are articulated, the lower surface at arm backup pad both ends all is fixed with balance spring, balance spring's lower extreme all is fixed at the upper surface of roof.
Preferably, the hinge shaft of the arm supporting plate and the top plate and the hinge shaft of the linkage pull rod and the top plate are coaxial.
Preferably, the lowest swinging point of the swinging rod and the lowest point of the rim of the universal wheel are on the same horizontal plane.
Preferably, the two ends of the top plate and the two ends of the bottom plate of the auxiliary supporting mechanism are provided with fixing belt installing ports.
Preferably, a pushing handle extending horizontally backwards is arranged at the upper part of the rear end of the chair frame.
The invention has the beneficial technical effects that: the invention relates to an assistant standing wheelchair for old people, which is characterized in that firstly, an old person sits on a support seat plate, when the old person wants to stand up and leave the wheelchair, a motor is started by a hand-held top plate, the motor rotates to enable two driving blocks to contract towards the middle to enable the top plate to rise, the rear end of the support seat plate is driven to lift upwards through a linkage pull rod while the top plate rises, meanwhile, the whole assistant support mechanism is gradually inclined forwards under the guide of a guide rail, so that the assistant support mechanism is assisted and conforms to the natural change of the old person from a sitting posture to a standing posture, the old person is further helped to stand up and leave the wheelchair easily, the assistant standing wheelchair is convenient, practical, safe and reliable, moreover, an oscillating rod on a pedal assistant mechanism is driven by an electric push rod to adjust the angle to adapt to the placement of the feet of the old person, when the old person needs to stand up and leave the wheelchair, the electric push, the wheelchair can help the old to stand up and stand on the wheelchair in a comfortable and natural auxiliary mode, and is safe and convenient.
Drawings
FIG. 1 is a perspective view of a wheelchair for assisting the aged to stand;
FIG. 2 is a cross-sectional view of an assisted-standing wheelchair for aiding old people;
FIG. 3 is a perspective view of the chair frame;
FIG. 4 is a first perspective view of the auxiliary supporting mechanism;
FIG. 5 is a schematic perspective view of an auxiliary supporting mechanism;
FIG. 6 is a perspective view of the step assist mechanism;
FIG. 7 is a schematic cross-sectional view of the guide rail;
in the figure: 11. the chair comprises a chair frame 12, a driving rear wheel 13, a universal front wheel 14, a guide rail 141, a clamping groove 15, a rack 16, a fixed cantilever 17, a support seat 18, a pushing handle 21, a supporting seat plate 22, a linkage pull rod 31, a bottom plate 31, a lower support arm 32, a driving block 33, a driving block 34, an upper support arm 35, a top plate 36, an arm support plate 37, a balance spring 38, a double-head-out screw motor 39, a driving roller 39, a fixed belt mounting opening 40, a swing rod 41, a pedal 42, a pedal 43, a leg protection plate 44, a gear 45 and an electric push rod.
Detailed Description
In the first embodiment, referring to fig. 1-7, an assistant standing wheelchair for old people comprises a chair frame, assistant supporting mechanisms and pedal assistant mechanisms, wherein the assistant supporting mechanisms and the pedal assistant mechanisms are arranged on the left side and the right side of the chair frame;
the chair frame is a frame in the form of a chair formed by connecting a plurality of metal rods end to end, bilateral universal front wheels are installed at the front end of the bottom of the chair frame, bilateral driving rear wheels are installed at the rear end of the bottom of the chair frame, bilateral guide rails are arranged at the positions of armrests on two sides of the chair frame, the guide rails are two arc-shaped strips arranged in parallel, clamping grooves are formed in the opposite surfaces of the two arc-shaped strips, the upper ends of the guide rails are bent downwards at the front and the lower ends from bottom to top, and the specific profile radian of the arc-shaped strips is set according to actual conditions and requirements;
the auxiliary supporting mechanism is arranged at the positions of armrests at the two sides of the chair frame and is positioned at the inner side of the corresponding guide rail, the mechanism comprises a bottom plate, an upper supporting arm, a lower supporting arm, a top plate, driving blocks and a double-head screw motor, the bottom plate is hinged on a support on the chair frame, symmetrical lower supporting arms are hinged on the bottom plate and positioned at the front side and the rear side of the support, the upper ends of two lower limbs are respectively hinged with the lower ends of the two driving blocks, the upper ends of the two driving blocks are respectively hinged with the upper supporting arm, the upper ends of the two upper supporting arms are respectively hinged on the top plate, wherein the bottom plate, the two lower supporting arms, the driving blocks, the two upper supporting arms and the top plate form an octagon which is symmetrical up and down and front and rear, two screw shafts of the double-head screw motor are respectively connected with the two driving blocks to form screw rod nut transmission, a driving roller is fixed on the outer side surface of the double-head screw motor through a revolute pair, the driving roller is clamped in a clamping groove between two arc-shaped strips of the guide rail, a supporting seat plate is further mounted on the chair frame, two sides of the front end of the supporting seat plate are coaxially hinged on the chair frame, linkage pull rods are symmetrically hinged on two sides of the rear end of the supporting seat plate, and the upper end of each linkage pull rod is hinged with a top plate on the corresponding side; the double-head-out screw motor drives the driving block with opposite threads to contract inwards or expand outwards, so that the top plate is lifted through the upper support arm and the lower support arm, meanwhile, the whole auxiliary supporting mechanism is guided by the guide rail through the driving roller, and is lifted while inclining forwards around the support and driving the support base plate to incline forwards, so that the process that a person stands up and naturally inclines forwards is matched.
The pedal auxiliary mechanism is arranged at the positions where legs at two sides of the front end of the chair frame are placed and comprises a swinging rod, a pedal plate, a leg guard plate and an electric push rod, the upper end of the swinging rod is hinged on a fixed cantilever horizontally extending out of the front end of the chair frame, the pedal plate extending towards the inner side is fixed at the lowest end of the swinging rod, the cross section of the leg guard plate is L-shaped, one long edge of the leg guard plate is sleeved on the swinging rod through a revolute pair and freely rotates around the swinging rod, a gear sleeved on the swinging rod is fixed at the upper end of the leg guard plate, a rack with teeth on the side surface and correspondingly matched with the gear is fixed on the chair frame, the outer end of the rack is an upward-raised arc shape, the arc shape is consistent with the swinging radian of the gear along with the swinging rod, the rack and the gear are meshed to form gear-rack transmission, one end of the electric push rod is hinged on the chair frame, the swing rod and the electric push rod swing in the same vertical plane.
The roof of auxiliary stay mechanism on all articulated have an arm backup pad, the middle part and the roof of arm backup pad are articulated, the lower surface at arm backup pad both ends all is fixed with balance spring, balance spring's lower extreme all is fixed at the upper surface of roof, the arm backup pad is used for the support of old man's arm to put, increases the comfort level through balance spring.
The articulated shaft of arm backup pad and roof and the articulated shaft coaxial of linkage pull rod and roof.
The lowest swinging point of the swinging rod and the lowest point of the rim of the universal wheel are on the same horizontal plane, the lower end of the swinging rod is just supported on the ground when swinging to the lowest point, and the old can stand up safely and stably.
And fixing belt mounting ports are respectively arranged at the two ends of the top plate and the two ends of the bottom plate of the auxiliary supporting mechanism. The fixing belt is convenient to arrange when necessary. The upper part of the rear end of the chair frame is provided with a pushing handle which extends backwards horizontally and is used for pushing the wheelchair.
The use process and the principle of the invention are as follows:
firstly, the old people sit on the support seat plate, when the old people think to stand up and leave the wheelchair, the old people holds the arm support plate and starts the screw motor, the screw motor rotates to enable the two driving blocks to contract towards the middle to enable the top plate to ascend, the rear end of the support seat plate is driven to ascend through the linkage pull rod while the top plate ascends, meanwhile, the whole auxiliary support mechanism gradually inclines forwards under the guide of the guide rail, so that the natural transition from sitting posture to standing posture of the old people is assisted and complied, the old people are further helped to stand up and leave the wheelchair easily, the wheelchair is convenient, practical, safe and reliable, moreover, the swing rod on the pedal auxiliary mechanism is driven by the electric push rod to adjust the angle to adapt to the placement of the feet of the old people, when the old people need to stand up and leave the wheelchair, the electric push rod drives the swing rod to swing downwards and contact with the ground, in the, the wheelchair can help the old to stand up and stand on the wheelchair in a comfortable and natural auxiliary mode, and is safe and convenient.
Claims (6)
1. Help the supplementary wheelchair of standing of old age, this wheelchair include the chair frame, install supplementary supporting mechanism and pedal complementary unit in the chair frame left and right sides, characterized by:
the chair frame is a frame in the form of a chair formed by connecting a plurality of metal rods end to end, the front end of the bottom of the chair frame is provided with bilateral universal front wheels, the rear end of the bottom of the chair frame is provided with bilateral driving rear wheels, the positions of handrails at two sides of the chair frame are provided with bilateral guide rails, the guide rails are two arc-shaped strips arranged in parallel, the opposite surfaces of the two arc-shaped strips are provided with clamping grooves, and the upper ends of the guide rails are gradually bent downwards from bottom to top after the front ends and the lower ends are arranged;
the auxiliary supporting mechanism is arranged at the positions of armrests at the two sides of the chair frame and is positioned at the inner side of the corresponding guide rail, the mechanism comprises a bottom plate, an upper supporting arm, a lower supporting arm, a top plate, driving blocks and a double-head screw motor, the bottom plate is hinged on a support on the chair frame, symmetrical lower supporting arms are hinged on the bottom plate and positioned at the front side and the rear side of the support, the upper ends of two lower limbs are respectively hinged with the lower ends of the two driving blocks, the upper ends of the two driving blocks are respectively hinged with the upper supporting arm, the upper ends of the two upper supporting arms are respectively hinged on the top plate, wherein the bottom plate, the two lower supporting arms, the driving blocks, the two upper supporting arms and the top plate form an octagon which is symmetrical up and down and front and rear, two screw shafts of the double-head screw motor are respectively connected with the two driving blocks to form screw rod nut transmission, a driving roller is fixed on the outer side surface of the double-head screw motor through a revolute pair, the driving roller is clamped in a clamping groove between two arc-shaped strips of the guide rail, a supporting seat plate is further mounted on the chair frame, two sides of the front end of the supporting seat plate are coaxially hinged on the chair frame, linkage pull rods are symmetrically hinged on two sides of the rear end of the supporting seat plate, and the upper end of each linkage pull rod is hinged with a top plate on the corresponding side;
the pedal auxiliary mechanism is arranged at the positions where legs at two sides of the front end of the chair frame are placed and comprises a swinging rod, a pedal plate, a leg guard plate and an electric push rod, the upper end of the swinging rod is hinged on a fixed cantilever horizontally extending out of the front end of the chair frame, the pedal plate extending towards the inner side is fixed at the lowest end of the swinging rod, the cross section of the leg guard plate is L-shaped, one long edge of the leg guard plate is sleeved on the swinging rod through a revolute pair and freely rotates around the swinging rod, a gear sleeved on the swinging rod is fixed at the upper end of the leg guard plate, a rack with teeth on the side surface and correspondingly matched with the gear is fixed on the chair frame, the outer end of the rack is an upward-raised arc shape, the arc shape is consistent with the swinging radian of the gear along with the swinging rod, the rack and the gear are meshed to form gear-rack transmission, one end of the electric push rod is hinged on the chair frame, the swing rod and the electric push rod swing in the same vertical plane.
2. The assisted-standing wheelchair as claimed in claim 1, wherein: the top plate of the auxiliary supporting mechanism is hinged with an arm supporting plate, the middle of the arm supporting plate is hinged with the top plate, the lower surfaces of two ends of the arm supporting plate are fixed with balance springs, and the lower ends of the balance springs are fixed on the upper surface of the top plate.
3. The assisted-standing wheelchair as claimed in claim 2, wherein: the articulated shaft of arm backup pad and roof and the articulated shaft coaxial of linkage pull rod and roof.
4. The assisted-standing wheelchair as claimed in claim 1, wherein: the lowest swinging point of the swinging rod and the lowest point of the rim of the universal wheel are on the same horizontal plane.
5. The assisted-standing wheelchair as claimed in claim 1, wherein: and fixing belt mounting ports are respectively arranged at the two ends of the top plate and the two ends of the bottom plate of the auxiliary supporting mechanism.
6. The assisted-standing wheelchair as claimed in claim 1, wherein: the upper part of the rear end of the chair frame is provided with a pushing handle which extends backwards horizontally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911162739.1A CN110859711B (en) | 2019-11-25 | 2019-11-25 | Wheelchair for helping old people to stand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911162739.1A CN110859711B (en) | 2019-11-25 | 2019-11-25 | Wheelchair for helping old people to stand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110859711A true CN110859711A (en) | 2020-03-06 |
| CN110859711B CN110859711B (en) | 2021-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911162739.1A Active CN110859711B (en) | 2019-11-25 | 2019-11-25 | Wheelchair for helping old people to stand |
Country Status (1)
| Country | Link |
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| CN (1) | CN110859711B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111407536A (en) * | 2020-04-02 | 2020-07-14 | 浙江大学 | Parkinson's disease patient activity auxiliary device |
| CN111557806A (en) * | 2020-05-20 | 2020-08-21 | 中山市浩雅生物科技有限公司 | Orthopedic surgery is with nursing frame |
| CN111888109A (en) * | 2020-08-12 | 2020-11-06 | 南通大学 | Wheelchair for assisting old people in getting up and sitting down to go to toilet |
| CN111888113A (en) * | 2020-08-04 | 2020-11-06 | 哈尔滨工业大学 | Gravity center adaptation auxiliary chair |
| CN112245129A (en) * | 2020-10-19 | 2021-01-22 | 广东甲子科技有限公司 | Lightweight leg rehabilitation device |
| CN112370255A (en) * | 2020-11-12 | 2021-02-19 | 安徽医科大学第一附属医院 | Wheel chair |
| CN112891153A (en) * | 2021-01-25 | 2021-06-04 | 武汉理工大学 | Indoor standing-assisting device for old people |
| CN113101080A (en) * | 2021-04-12 | 2021-07-13 | 张丽萍 | Ware of rising is used in nursing after surgery suitable for old patient |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111407536A (en) * | 2020-04-02 | 2020-07-14 | 浙江大学 | Parkinson's disease patient activity auxiliary device |
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| CN111557806A (en) * | 2020-05-20 | 2020-08-21 | 中山市浩雅生物科技有限公司 | Orthopedic surgery is with nursing frame |
| CN111888113A (en) * | 2020-08-04 | 2020-11-06 | 哈尔滨工业大学 | Gravity center adaptation auxiliary chair |
| CN111888113B (en) * | 2020-08-04 | 2021-09-03 | 哈尔滨工业大学 | Gravity center adaptation auxiliary chair |
| CN111888109A (en) * | 2020-08-12 | 2020-11-06 | 南通大学 | Wheelchair for assisting old people in getting up and sitting down to go to toilet |
| CN111888109B (en) * | 2020-08-12 | 2022-08-23 | 南通大学 | Wheelchair for assisting old people in getting up and sitting down to go to toilet |
| CN112245129A (en) * | 2020-10-19 | 2021-01-22 | 广东甲子科技有限公司 | Lightweight leg rehabilitation device |
| CN112245129B (en) * | 2020-10-19 | 2022-11-22 | 广东甲子科技有限公司 | Lightweight leg rehabilitation device |
| CN112370255A (en) * | 2020-11-12 | 2021-02-19 | 安徽医科大学第一附属医院 | Wheel chair |
| CN112891153A (en) * | 2021-01-25 | 2021-06-04 | 武汉理工大学 | Indoor standing-assisting device for old people |
| CN113101080A (en) * | 2021-04-12 | 2021-07-13 | 张丽萍 | Ware of rising is used in nursing after surgery suitable for old patient |
| CN113101080B (en) * | 2021-04-12 | 2022-04-19 | 张丽萍 | Ware of rising is used in nursing after surgery suitable for old patient |
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| Publication number | Publication date |
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| CN110859711B (en) | 2021-06-22 |
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