CN114305894B - An adjustable wheelchair with Mecanum wheels for stable movement - Google Patents
An adjustable wheelchair with Mecanum wheels for stable movement Download PDFInfo
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- CN114305894B CN114305894B CN202111683394.1A CN202111683394A CN114305894B CN 114305894 B CN114305894 B CN 114305894B CN 202111683394 A CN202111683394 A CN 202111683394A CN 114305894 B CN114305894 B CN 114305894B
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- 238000005299 abrasion Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
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Abstract
The invention relates to an adjustable wheelchair based on stable movement of Mecanum wheels. The utility model provides an adjustable wheelchair based on Mecanum wheel stable movement, adjustable wheelchair includes base, cushion, back of the chair and handrail, and the base is used for connecting the wheel, and the cushion is connected to the base through the adjusting part that is used for supporting user's weight, and adjustable wheelchair is provided with adjusting part according to the mode that can adapt to different users and uses, and adjusting part is including being used for adjusting the high adjustable part of seat. The first adjustable member includes a first bracket and a second bracket disposed to cross each other, and is configured to be arc-shaped in such a manner that the height of the seat can be raised by changing the height of the first bracket near one end of the base and maintaining the seat level with the distance between the first bracket and the second bracket near one end of the seat cushion unchanged when the user sits on the wheelchair.
Description
Technical Field
The invention relates to the technical field of rehabilitation auxiliary equipment, in particular to an adjustable wheelchair with a Mecanum wheel capable of stably moving.
Background
According to the demographic data of recent years of China, the total population ratio of people over 65 years old in 2018 reaches 11.94%, the daily travel of the elderly people has great dependence on wheelchairs, and the old people and the groups losing the walking function cause the society to have larger and larger demand on wheelchairs due to traffic safety accidents, unexpected events, trouble of diseases and the like. And most of the people need to completely depend on the wheelchair to move in most of the time, so the comfort and scientificity of the wheelchair are very important. The height of the wheelchair can influence the sitting posture of a user, and the user can be in an abnormal working position such as the waist, the legs, the back and the neck of the user due to uncomfortable sitting posture for a long time, so that the joints of the user are easily damaged in daily activities. Because the group stature difference is larger, the cost of the wheelchair with the fixed size is higher and the universality is lower, most of the existing wheelchairs can be adjusted in height so as to adapt to safe use of users with different statures.
The existing wheelchair height adjusting method is mainly carried out through a screw rod, a hydraulic rod and a cross rod. For example, CN211067519U discloses a method for heightening a seat with a screw, the height adjusting structure of which comprises a cover body, a rocker, a rotating rod, a ratchet, a spring, a first conical gear, a second conical gear, a thread bush, a threaded rod, a supporting block and a telescopic rod, wherein the cover body is fastened at the lower end of the middle part of the frame body, the left side of the rocker is fixed with the rotating rod, the left side of the rotating rod penetrates through the cover body to be fixed with the ratchet, the ratchet is arranged at the right side of the lower end of the cover body, the spring is tightly wound at the lower end of the ratchet, the right side of the first conical gear is fixed with the rotating rod, the first conical gear is meshed with the right side of the second conical gear, the second conical gear is fastened at the middle part of the thread bush, the bottom of the thread bush is in rotating fit with the inner part of the cover body through a bearing, the bottom of the threaded rod is meshed with the thread bush, the bottom of the supporting block is fixed with the threaded rod and the telescopic rod respectively, and the middle part of the supporting block slides up and down at the upper end of the cover body. This structure adjusts the wheelchair to rise or fall by shaking the swivel lever, which is convenient but laborious, and the screw is easily slipped, thus the stability and safety are poor.
CN105853081B discloses a height-adjusting mechanism, which consists of a lower support inner plate, a lower support inner plate connecting plate B, an electric push rod a, a semicircular connecting plate B, a bottom sliding rod, a lower connecting rod support a, a guide rail sliding block a, a guide rail a, a lower support outer frame, a lower connecting rod a, a lower support inner plate connecting plate a and a lower connecting rod B, the other end of the lower connecting rod B of the height-adjusting mechanism is connected with the lower part of a bed backrest of the electric wheelchair bed body, the other end of the lower connecting rod a is connected with the lower part of a bed calf plate of the electric wheelchair bed body through a cam bearing, the electric wheelchair bed body consists of a lower connecting rod support B, a bed backrest, a guide rail sliding block B, a guide rail B, a bed backrest connecting plate a, a bed backrest connecting plate B, a bed backrest connecting plate C, a triangular handle, an electric push rod B, a bed seat plate connecting plate, a bed calf plate, a foot plate, an inverted door-shaped outer frame, a bed backrest deforming connecting rod, a bed calf plate long deforming connecting rod and a bed calf plate short deforming connecting rod, an inverted-door-shaped outer frame is sleeved on the outer walls of the lower leg plate and the foot plate, the upper end of the inverted-door-shaped outer frame extends to the upper part of the lower leg plate, the upper end of the inverted-door-shaped outer frame is respectively connected with one end of a backrest deformation connecting rod through a rotating pin shaft, the other end of each backrest deformation connecting rod is respectively connected with two side surfaces of the backrest through rotating pins, the outer side of each backrest deformation connecting rod is respectively connected with one end of a long deformation connecting rod of the lower leg plate through a rotating pin shaft, the other end of the long deformation connecting rod of the lower leg plate is connected with one end of a short deformation connecting rod of the lower leg plate through a rotating pin shaft, the other end of the short deformation connecting rod of the lower leg plate is connected with two side surfaces of the inverted-door-shaped outer frame through a rotating pin shaft, and the bed leg plate rotates along with the short deformation connecting rod of the lower leg plate of the bed. The angle of the lower connecting rod is changed by pushing the lower connecting rod through the electric push rod so as to realize the elevation or the reduction of the wheelchair, but the distance between the upper connecting rod and the lower connecting rod can be changed in the using process in such a way, so that the stress structure of the wheelchair is changed, the comfort of a user is reduced, and the stability of the wheelchair is possibly reduced.
The existing wheelchairs are mostly simple in structure, and the universal wheels capable of changing angles are mostly arranged at the front wheels, and the main weight of the wheelchairs is mostly concentrated on the rear wheels because the front wheels need to change the direction of the front wheels so as to avoid the front wheels from turning to lose the center of gravity of the wheelchairs. The arrangement mode makes the gravity center unstable easily and the balance is difficult to master under the condition of jolting. In addition, the existing height adjusting method can support the user to adjust the height while riding, and the mode has higher requirements on the strength of the screw threads and the strength of the electric push rod, so that the user is easy to fall down or frighten due to sudden reduction of the wheelchair caused by screw thread damage or sliding wire in the adjusting process due to overweight of the user, and the safety is limited.
Furthermore, since the inventors herein have studied numerous documents and patents, on the one hand, and have not set forth in detail all the details and content of the invention for the purpose of understanding the differences to those skilled in the art, on the other hand, the invention is by no means lacking in the features of the prior art, but rather the invention has all the features of the prior art, and the applicant retains the right of the prior art in the background of this invention.
Disclosure of Invention
In order to overcome the defects in the prior art, the adjustable wheelchair based on the stable movement of the Mecanum wheels at least comprises a base and a cushion, wherein the base is used for being connected with the wheels, the cushion is connected to the base through an adjusting component for supporting the weight of a user, and the adjusting component comprises an adjustable component I for adjusting the height of the seat. The first adjustable component comprises a first bracket and a second bracket which are arranged in a crossing way, and the first adjustable component is connected with the base through a movable component in a way of being capable of increasing the height of the seat by changing the height of one end of the first bracket close to the base and keeping the seat level and the distance between one ends of the first bracket and the second bracket close to the seat cushion unchanged. The first bracket and the second bracket are arranged in an arc shape toward the first direction in such a manner that the center of gravity offset position of the device is smaller than a first threshold value when rotated by a certain angle toward the first direction. Preferably, the first threshold is a gravity center position offset value generated when the straight rods arranged in the same direction rotate by the same angle towards the first direction.
According to a preferred embodiment, the base of the adjustable wheelchair comprises a frame, a first support bar and a second support bar. The first support rod comprises a first end and a second end, and the second support rod comprises a third end and a fourth end. The second end of the first support rod and the fourth end of the second support rod are rotatably connected with each other through a first bearing. The frame is symmetrically provided with a pair of first wheels and a pair of second wheels, and the second end of the first supporting rod and the first wheels are movably connected with the frame through second bearings. The third end of the first supporting rod is movably connected with the second wheel and the frame through a third bearing. The first support rod, the second support rod and one side of the frame form a triangle in a mode that the stability of the wheelchair can be guaranteed, and one side of the frame is a hypotenuse of the triangle.
According to a preferred embodiment, the first bracket includes a fifth end and a sixth end, and the fifth end of the first bracket is rotatably connected to a side surface of the seat cushion facing the ground. The sixth end of the first bracket is connected with the base through a movable component in a mode of changing the setting position. The second bracket comprises a seventh end and an eighth end, the seventh end is rotationally connected with one side surface of the cushion towards the ground after the second bracket is crossed with the first bracket, the eighth end of the second bracket is connected with the second end of the first supporting rod and the fourth end of the second supporting rod through a first bearing,
The first and second brackets intersect each other at a first connection point, the first section of the first bracket, the second section of the second bracket, and the third section of the seat cushion forming a triangle. The first section is a section from the fifth end of the first bracket to the first connecting point, the second section is a section from the seventh end of the second bracket to the first connecting point, and the third section is a section between the fifth end of the first bracket and the seventh end of the second bracket on the side surface of the seat cushion close to the ground.
According to a preferred embodiment, the first connecting points are provided with a fixing structure and a connecting rod, two ends of the connecting rod are respectively connected with two first connecting points arranged on two sides of the wheelchair, and the two opposite first connecting points are respectively matched with the fixing structure at two ends to be tightly connected.
According to a preferred embodiment, the movable assembly is arranged on the frame between the first wheel and the second wheel, and the sixth end of the first bracket is connected to the movable assembly. Under the condition that the second support rotates in the direction away from the ground by taking the first bearing as the center of a circle so that the linear distance between the seventh end of the second support and the ground is increased by S1, the connection point of the sixth end of the first support and the movable assembly is changed from being connected with the first working position of the movable assembly to being connected with the second working position of the movable assembly in a mode that the distance between the fifth end of the first support and the seventh end of the second support is kept unchanged.
According to a preferred embodiment, the structure of the mobile assembly adapted to the first support is arranged to have at least a first working position and a second working position.
According to a preferred embodiment, the adjustment assembly further comprises an adjustable second part for adjusting the height of the armrest. The second adjustable member includes a first lever, a second lever, a handle, and a locking member for maintaining a relative position between the first lever and the second lever. The first and second bars are provided in different sizes, the first and second bars are coaxially inserted into each other, and the locking member is sleeved outside the insertion point of the first and second bars and can maintain the connection of the first and second bars based on rotation in a first direction and can release the connection of the first and second bars based on rotation opposite to the first direction.
According to a preferred embodiment, the locking component comprises a lock seat with a plurality of elastic pieces at one end and a lock sleeve which is sleeved on the outer side of the lock seat and can rotate positively and negatively, at least one outwards protruding arc-shaped part is arranged on the surface of each elastic piece, inner grooves which are identical in number with the arc-shaped parts and are matched with each other in an anastomotic mode are formed in the inner side of the lock sleeve, when the lock sleeve rotates in a first direction, the arc-shaped parts enter the inner grooves, the extrusion force born by the elastic pieces disappears, the elastic pieces are separated from the inner rods, when the lock sleeve rotates in a second direction, the arc-shaped parts are separated from the inner grooves, the elastic pieces are extruded, and the first rods inserted into the lock sleeve are held tightly, so that the fixed connection of the first rods and the second rods is achieved.
According to a preferred embodiment, the handle is connected to the end of the first rod remote from the second rod by means of a rotational positioning assembly in such a way that it can be rotated to an angle with respect to the first rod and kept at that angle for at least t1 time. After the handle is rotated by a certain angle relative to the first lever, it can be positioned by the rotational positioning assembly so as to be maintained at that angle for at least t1 of time, so that the user can ride the wheelchair.
According to a preferred embodiment, the rotational positioning assembly comprises a stop assembly, a spring, a shaft connected to the handle through the center of the spring, and a stop tab connected to an end of the shaft remote from the handle. The limiting assembly comprises a limiting ring and a clamping block which is close to one end of the shaft and fixedly connected with the shaft. The spring one end with the fixture block butt, the other end with spacing piece butt, the stop collar keep away from the ninth end of handle with first pole is close to the one end of handle is connected, the stop collar is relative the tenth end of ninth end is provided with a plurality of towards the recess that is used for with the fixture block is connected and fixes the fixture block that the ninth end is sunken.
The seat has the beneficial technical effects that the height of the seat can be changed under the condition that the supporting stress structure of the seat cushion is not changed based on the first adjusting part, two triangular supporting structures exist in the adjusting process, the support is stable, and the first supporting rod and the second supporting rod are connected through the bearing and can rotate to a certain extent relative to each other when being extruded by high force, so that the cushion is buffered, the shaking of the seat cushion is reduced, and the use comfort is improved. Based on adjustable part two can carry out the rotation of certain angle with the handrail orientation side of wheelchair to enlarge the scope that the user sat on the wheelchair, convenient to use person sat on the wheelchair, and the caretaker of the patient of being convenient for lower part of the body weakness was embraced the wheelchair with the patient from the side, makes the use more convenient.
Drawings
FIG. 1 is a schematic diagram of the structure of a preferred embodiment of the present invention;
Fig. 2 is a schematic structural view of a preferred embodiment of the second adjustable component of the present invention.
List of reference numerals
10, A first supporting rod 11, a first end 12 and a second end
20, A second supporting rod 21, a third end 22 and a fourth end
30, A first bracket 31, a fifth end 32 and a sixth end
40 Second bracket 50 movable assembly 60 second rod
70 First rod 80 locking member 81 lock sleeve
82 Lock base 90, handle 100, rotary positioning assembly
110, A limiting ring 120, a clamping block 130 and a limiting sheet
140 Shaft
Detailed Description
The following detailed description refers to the accompanying drawings.
The Mecanum wheel is based on the principle of a central wheel having a plurality of wheel axles located at the periphery of the wheel, the angled peripheral wheel axles translating a portion of the wheel steering force above a wheel normal force. Depending on the direction and speed of the respective wheel, the final combination of these forces creates a resultant force vector in any desired direction, thereby ensuring that the platform is free to move in the final resultant force vector direction without changing the direction of the wheel itself. The Mecanum wheel is suitable for freely moving in multiple directions in a small space area, and the direction of the wheel shaft of the Mecanum wheel is not changed, so that the Mecanum wheel is stable in stress and stable in movement. Compared to a universal wheel that can freely change its own direction to accommodate movement in different directions, a pair of Mecanum wheels do not form contradictory angles with each other due to the change of its own direction, and can move in all directions in response to the direction of thrust without changing its own direction. Thus being very stable and safe when used as the front wheel of the wheelchair.
Example 1
The invention provides an adjustable wheelchair based on stable movement of Mecanum wheels. The adjustable wheelchair comprises a base, a cushion, a chair back and armrests. The base is used for connecting the wheels, and provides the supporting function of the force for the whole wheelchair. The seat cushion is connected to the base by an adjusting device to obtain a supporting force from the ground. The adjusting component is used for adjusting the height of the cushion, so that the wheelchair is suitable for users with different statures to sit and use, and the problems that the sitting posture of the user is not proper due to the fact that the height of the wheelchair is not proper and the joints of the user are damaged due to chronic abrasion in the use process are solved. The adjusting assembly comprises an adjustable component I for adjusting the height of the seat and an adjustable component II for adjusting the height of the armrests. Preferably, the first adjustable component includes a first bracket 30 and a second bracket 40, the first bracket 30 and the second bracket 40 being disposed across from each other. When a user sits on the wheelchair, the pair of adjustable components are respectively arranged at two sides close to the hand of the user. The first bracket 30 and the second bracket 40 of the first adjustable member are each provided in an arc shape having a certain curvature. Preferably, the curvature is 0.02-0.11. The adjustable member is capable of raising the height of the seat by changing the height of the end of the first bracket 30 near the base and maintaining the seat level with the distance between the ends of the first bracket 30 and the second bracket 40 near the seat cushion unchanged. Preferably, the first bracket 30 and the second bracket 40 are disposed in the same direction of bending. Preferably, the adjustable member includes a first rod 70 and a second rod 60 that are inserted into each other, and a sleeve 81 for fixing the relative positions of the first rod 70 and the second rod 60 is provided at the socket of the first rod 70 and the second rod 60. The first lever 70 and the second lever 60 can be adjusted to be different in height by adjusting the relative positions to each other. The lock sleeve 81 achieves maintaining the armrest at a fixed height by locking the relative position between the first lever 70 and the second lever 60. By such arrangement, the height of the seat cushion can be adjusted by adjusting the height of the first bracket 30 and the relative connection position between the first bracket 30 and the second bracket 40. And after the height is adjusted, the seat cushion is always kept horizontal and the distance between the connection point of the first bracket 30 and the seat cushion and the connection point of the second bracket 40 and the seat cushion is kept constant. Therefore, the structure and the stress structure of the wheelchair cushion are not affected, and a user does not need to adjust the sitting posture to adapt to the changed cushion stress structure when using the wheelchair cushion, so that the user can be always kept in the most comfortable and scientific sitting posture.
According to a preferred embodiment, the base of the adjustable wheelchair comprises a frame, a first support bar 10 and a second support bar 20. The first support bar 10 includes a first end 11 and a second end 12, and the second support bar 20 includes a third end 21 and a fourth end 22. The second end 12 of the first support bar 10 and the fourth end 22 of the second support bar 20 are rotatably connected to each other by a first bearing. The frame of the wheelchair is symmetrically provided with a pair of first wheels and a pair of second wheels, and the first end 11 of the first support bar 10 and the first wheels are movably connected with the frame through the second bearings. Preferably, the first wheel is a Mecanum wheel. Therefore, the first wheel does not need to change its own direction when turning, so the first support bar 10 can be kept at a fixed position of the wheelchair, and the support is stable. The third end 21 of the first support bar 10 is movably connected with the second wheel via a third bearing to the frame. By this arrangement, the first support bar 10, the second support bar 20 and one side of the frame form a triangle in such a way that the stability of the wheelchair can be ensured, and one side of the frame is a hypotenuse of the triangle. The triangular support has the characteristic of stability, and the effect of stabilizing the seat on the support frame is achieved. In addition, the first support rod 10 can rotate to a certain degree relative to the first bearing and the second bearing, and the second support rod 20 can rotate to a certain degree relative to the second bearing and the third bearing, so that after the cushion is connected through the adjustable component, the first support rod 10 and the second support rod 20 can play a role in buffering under the condition of needs. The required condition can be, for example, the condition that the rugged wheels on the road surface shake, and the shaking amplitude of the wheelchair cushion can be reduced, the comfort level of a user is improved, and the probability of the wheelchair losing the gravity center and tilting is reduced through the small-amplitude rotation of the adaptability of the first support rod 10 and the second support rod 20 relative to the bearings.
According to a preferred embodiment, the first bracket 30 includes a fifth end 31 and a sixth end 32, the fifth end 31 of the first bracket 30 is rotatably connected to a side surface of the seat cushion facing the ground, the sixth end 32 of the first bracket 30 is connected to the base through the movable assembly 50, and the installation position of the sixth end 32 of the first bracket 30 can be changed through the connection of the movable assembly 50, thereby changing the height of the first bracket 30 and thus the height of the seat. The first bracket 30 can be stably supported by the support of the movable assembly 50 so that the seat is maintained at this height. Preferably, the second bracket 40 includes a seventh end and an eighth end, and the seventh end is rotatably coupled to a side surface of the seat cushion facing the ground after the second bracket 40 crosses the first bracket 30. Preferably, the eighth end of the second bracket 40 is connected to the second end 12 of the first support bar 10 and the fourth end 22 of the second support bar 20 through a first bearing, thereby connecting the first adjusting part and the base of the wheelchair to each other to obtain a supporting force. Preferably, the first bracket 30 and the second bracket 40 intersect each other at a first connection point, and the first section of the first bracket 30, the second section of the second bracket 40 and the third section of the seat cushion constitute a triangle. Therefore, the wheelchair device has higher stability by utilizing the stability of the triangle. Preferably, the first section is a section from the fifth end 31 of the first bracket 30 to the first connection point, the second section is a section from the seventh end of the second bracket 40 to the first connection point, and the third section is a section between the fifth end 31 of the first bracket 30 and the seventh end of the second bracket 40 on a side surface of the seat cushion near the ground.
According to a preferred embodiment, the first connection points of the first bracket 30 and the second bracket 40 are provided with a fixing structure and a connecting rod, both ends of the connecting rod are respectively connected with two first connection points arranged at both sides of the wheelchair, and two opposite first connection points are respectively tightly connected with the fixing structure at both ends. Preferably, the engagement means of the fixing structure and the connecting rod may be, for example, a threaded engagement.
According to a preferred embodiment, the movable assembly 50 is disposed on the frame between the first wheel and the second wheel, and the sixth end 32 of the first bracket 30 is connected to the movable assembly 50. Preferably, in the case where the second bracket 40 rotates in a direction away from the ground around the first bearing such that the linear distance of the seventh end of the second bracket 40 from the ground increases by S1, the connection point of the sixth end 32 of the first bracket 30 to the movable assembly 50 is changed from the first working position of the movable assembly 50 to the second working position of the movable assembly 50. In this way, the fifth end 31 of the first bracket 30 and the seventh end of the second bracket 40 can be made to lie in the same horizontal plane with the distance between the fifth end 31 of the first bracket 30 and the seventh end of the second bracket 40 maintained unchanged. Preferably, S1 may be 2cm-4cm. Preferably, S1 is most preferably 3cm.
According to a preferred embodiment, the mobile assembly 50 is adapted to the structural arrangement of the first carriage 30 to have at least a first operating position and a second operating position. Wherein the wheelchair cushion remains at a minimum height when the first bracket 30 is coupled to the first operational position of the movable assembly 50. When the first bracket 30 is connected to the second working position of the movable assembly 50, the wheelchair is elevated S1 cm relative to the lowest position. Preferably, the movable assembly 50 also includes a third operating position. When the first bracket 30 is connected to the third operating position of the movable assembly 50, the wheelchair is raised 2S1 relative to the lowermost position. Preferably, the movable assembly 50 further includes a fourth operating position, and the wheelchair is elevated 3S1 relative to the lowermost position when the first bracket 30 is coupled to the fourth operating position of the movable assembly 50. Preferably, the wheelchair is at its highest elevation.
According to a preferred embodiment, the second adjustable member further comprises a first lever 70, a second lever 60, a handle 90 and a locking member 80 for maintaining the relative position between the first lever 70 and the second lever 60. Preferably, the first and second rods 70 and 60 are provided in different sizes, and the first and second rods 70 and 60 are coaxially inserted into each other. Preferably, the first rod 70 is smaller in size than the second rod 60, and the first rod 70 is inserted into the second rod 60. The locking member 80 is sleeved outside the plug-in point of the first and second levers 70 and 60 and is capable of maintaining the connection of the first and second levers 70 and 60 based on the rotation in the first direction and is capable of releasing the connection of the first and second levers 70 and 60 based on the rotation in the second direction opposite to the first direction.
According to a preferred embodiment, the locking member 80 includes a lock base 82 and a lock sleeve 81. One end of the lock base 82 is provided with a plurality of spring plates. One end of the lock base 82 opposite to the spring plate is fixedly connected with one end of the second rod 60 close to the handle 90. The lock sleeve 81 is coupled to the outside of the lock housing 82 and can control the tightness of the connection between the first lever 70 and the second lever 60 by rotating in the opposite directions. At least one convex arc-shaped part is arranged on the surface of the elastic sheet. The inner side of the lock sleeve 81 is provided with inner grooves which are identical in number with the arc-shaped parts and are matched with each other. When rotating in the first direction, the arc part enters the inner groove, the extrusion force received by the elastic sheet disappears, the elastic sheet is separated from the inner rod, and when rotating in the second direction, the arc part is separated from the inner groove, the elastic sheet is extruded, and the first rod 70 inserted into the inner groove is held tightly, so that the fixed connection of the first rod 70 and the second rod 60 is realized. Through the arrangement mode, the height of the handrail can be adjusted at any value in a certain range, the adjusting method is simple, and a user can adjust the handrail according to the needs.
According to a preferred embodiment, the handle 90 is coupled to the end of the first rod 70 remote from the second rod 60 by a rotational positioning assembly 100 in a manner that is rotatable through an angle relative to the first rod 70 and maintained at the angle for at least a time t 1. Preferably, the time t1 is the maximum time required for the user to sit on the wheelchair, and may be, for example, 5 minutes. By means of the arrangement mode, the armrests can be rotated to a fixed angle according to needs and kept at the angle, and when a user needs to get on or off the wheelchair, the armrests can be rotated to the outer side of the wheelchair, so that the user can sit on the wheelchair from the side. Preferably, the angle of rotation of the armrest may be 30 ° -90 °, most preferably 45 °. The arrangement mode is particularly suitable for the situation that the body of a user cannot exert force, and when the wheelchair is sat on from the side after the armrests are rotated, the caregivers can conveniently exert force to hold the user on the wheelchair.
According to a preferred embodiment, the rotational positioning assembly 100 includes a stop collar 110, a spring, a shaft 140, a latch 120, and a stop tab 130. The ninth end of the limiting ring 110 far away from the handle 90 is connected with one end of the first rod 70 near the handle 90, and a plurality of grooves which are sunken towards the ninth end and used for connecting with the clamping block 120 and fixing the clamping block 120 are formed in the tenth end of the limiting ring 110 opposite to the ninth end. The shaft 140 is connected to the handle 90 through the center of the spring. The stop tab 130 is attached to an end of the shaft 140 remote from the handle 90. The side surface of the first limiting piece contacts with the inner side wall of the limiting ring 110, and the first limiting piece can slide relative to the inner side wall of the limiting ring 110. The clamping block 120 is fixedly connected with the handle 90, and the clamping block 120 can be matched with the groove in shape, so that the clamping block 120 can be limited to move through the groove, and the handle 90 is further limited to move, so that the handle 90 is kept at a fixed angle. The limiting ring 110 is further provided with a second limiting piece, and the second limiting piece is disposed between the clamping block 120 and the first limiting piece. The two ends of the spring are respectively connected with the first limiting piece and the second limiting piece. The second limiting piece is provided with a hole in the middle for the shaft 140 to penetrate. Preferably, the size of the hole is larger than that of the shaft 140, so that the shaft 140 does not touch the second limit plate during the movement.
When the second adjustable component is in use, a user can drive the first limiting piece to slide towards the handle 90 relative to the inner wall of the limiting ring 110 by pulling the handle 90. The spring is then compressed and the latch 120 fixedly coupled to the handle 90 is also disengaged from the recess, at which time the user rotates by grasping the handle 90, changing the angle of the handle 90. When changed to an appropriate angle, the handle 90 is released, and the handle 90 can be restored downward based on the elastic potential energy of the spring and gravity, and the latch 120 is again coupled with the groove such that the angle of the handle 90 is fixed at the angle. When readjustment is needed, the same method is only needed to be used again.
It should be noted that the above-described embodiments are exemplary, and that a person skilled in the art, in light of the present disclosure, may devise various solutions that fall within the scope of the present disclosure and fall within the scope of the present disclosure. It should be understood by those skilled in the art that the present description and drawings are illustrative and not limiting to the claims. The scope of the invention is defined by the claims and their equivalents.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111683394.1A CN114305894B (en) | 2021-12-31 | 2021-12-31 | An adjustable wheelchair with Mecanum wheels for stable movement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111683394.1A CN114305894B (en) | 2021-12-31 | 2021-12-31 | An adjustable wheelchair with Mecanum wheels for stable movement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114305894A CN114305894A (en) | 2022-04-12 |
| CN114305894B true CN114305894B (en) | 2025-02-07 |
Family
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| CN114176922A (en) * | 2021-12-31 | 2022-03-15 | 合肥工业大学 | A wheelchair suitable for lightly handicapped people |
| CN216725001U (en) * | 2021-12-31 | 2022-06-14 | 合肥工业大学 | Anti-falling wheelchair |
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| AU2002363218A1 (en) * | 2001-10-26 | 2003-05-12 | Electric Mobility Corporation | Foldable personal mobility vehicle |
| NL2003506C2 (en) * | 2009-09-17 | 2011-03-21 | Bobergo B V | ROLLATOR WHEELCHAIR. |
| JP5654819B2 (en) * | 2010-09-27 | 2015-01-14 | 株式会社ミツバ | Differential casters and electric wheelchairs |
| TW201440749A (en) * | 2013-04-18 | 2014-11-01 | Bethesda Creativity Dev Co Ltd | Size-adjustable wheelchair |
| CN104800012B (en) * | 2015-04-23 | 2017-05-10 | 邯郸学院 | Electric wheelchair adjustment device based on computer instructions |
| KR20170124398A (en) * | 2016-05-02 | 2017-11-10 | 임윤택 | Bed chair |
| CN208031401U (en) * | 2017-09-04 | 2018-11-02 | 广东开放大学（广东理工职业学院） | A kind of lifting wheelchair with rotation function |
| CN209347456U (en) * | 2018-08-21 | 2019-09-06 | 深圳心诺智造医疗有限公司 | A kind of electric wheelchair |
| KR102186898B1 (en) * | 2018-10-01 | 2020-12-04 | 순천향대학교 산학협력단 | Wheel Chair Having Horizontal Maintenance Function |
| US10918544B2 (en) * | 2018-10-10 | 2021-02-16 | Muhammad Abdullah | Wheelchair lift apparatus |
| US11298280B2 (en) * | 2019-03-25 | 2022-04-12 | Ken MayField | Wheelchair incorporated with a lift apparatus |
| CN110013395B (en) * | 2019-04-16 | 2024-04-12 | 江苏福维健康科技有限公司 | Auxiliary standing wheelchair with changeable wheelbase of front and rear wheels |
| CN110251326A (en) * | 2019-07-09 | 2019-09-20 | 苏州凯道智能设备有限公司 | A foldable electric wheelchair |
| DE102020121375B4 (en) * | 2019-08-14 | 2023-07-06 | Adient Us Llc | Seat support structure for a vehicle seat |
| PL239788B1 (en) * | 2019-09-11 | 2022-01-10 | Reac Poland Spolka Z Ograniczona Odpowiedzialnoscia | Hoist, in particular for changing the position of a seat in a wheelchair |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114176922A (en) * | 2021-12-31 | 2022-03-15 | 合肥工业大学 | A wheelchair suitable for lightly handicapped people |
| CN216725001U (en) * | 2021-12-31 | 2022-06-14 | 合肥工业大学 | Anti-falling wheelchair |
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