EP3251649B1 - Wheel chair - Google Patents

Wheel chair Download PDF

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Publication number
EP3251649B1
EP3251649B1 EP15880052.4A EP15880052A EP3251649B1 EP 3251649 B1 EP3251649 B1 EP 3251649B1 EP 15880052 A EP15880052 A EP 15880052A EP 3251649 B1 EP3251649 B1 EP 3251649B1
Authority
EP
European Patent Office
Prior art keywords
link
seat
wheelchair
interlock
brake
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15880052.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3251649A4 (en
EP3251649A1 (en
Inventor
Kei Ooyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
France Bed Co Ltd
Original Assignee
France Bed Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2015095408A external-priority patent/JP6263497B2/ja
Priority claimed from JP2015095407A external-priority patent/JP6263496B2/ja
Application filed by France Bed Co Ltd filed Critical France Bed Co Ltd
Priority claimed from PCT/JP2015/075470 external-priority patent/WO2016121158A1/ja
Publication of EP3251649A1 publication Critical patent/EP3251649A1/en
Publication of EP3251649A4 publication Critical patent/EP3251649A4/en
Application granted granted Critical
Publication of EP3251649B1 publication Critical patent/EP3251649B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • A61G5/02—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person
    • 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
    • A61G5/1005—Wheelchairs having brakes
    • A61G5/1008—Wheelchairs having brakes for gradually slowing down the wheelchair
    • 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
    • A61G5/1005—Wheelchairs having brakes
    • A61G5/101—Wheelchairs having brakes of the parking brake type, e.g. holding the wheelchair
    • 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
    • A61G5/1005—Wheelchairs having brakes
    • A61G5/1013—Wheelchairs having brakes engaging the wheel
    • A61G5/1018—Wheelchairs having brakes engaging the wheel on the running surface
    • 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
    • A61G5/1005—Wheelchairs having brakes
    • A61G5/1035—Wheelchairs having brakes manipulated by wheelchair user
    • 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
    • A61G5/1005—Wheelchairs having brakes
    • A61G5/1037—Wheelchairs having brakes manipulated by assisting person
    • 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
    • A61G5/1054—Large wheels, e.g. higher than the seat portion
    • 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
    • A61G5/1059—Arrangements for adjusting the seat adjusting the height of the seat
    • 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

Definitions

  • the present invention relates to a wheelchair having the function of assisting a sitting user in standing up.
  • the wheelchair comprises a body, and a seat in which the user sits is mounted on a top surface side of the body, such that the seat can rotate and rise with its front end functioning as a fulcrum.
  • a pedal provided at the lower part of the front or back of the body, the seat can be rotated, such that its back end side rises with its front end functioning as a fulcrum via a link mechanism.
  • the user sitting in the seat stands up, grasping an armrest provided in the wheelchair to stand up with his or her body steady.
  • the user can maintain a pose assumed when he or she stand, even if his or her legs, feet, and waist are unsteady. Therefore, the user can stand up with stability.
  • the wheelchair is provided with foot brakes comprising pedals. Therefore, if the user applies the brakes by stepping on the pedals when standing, the wheelchair is prevented from moving, and thus, the user can stand with stability, grasping the armrest.
  • the present invention provides a wheelchair which enables a user to stand up with stability by causing wheels to be automatically braked when the user stands up from a seat.
  • the present invention is a wheelchair comprising: a main body; a wheel rotatably provided in the main body; a seat disposed on a top surface side of the main body; a footrest provided on a front side of the main body; a seat link mechanism by which the seat is supported to be movable up and down between a raised position and a lowered position on the top surface side of the main body; and a brake mechanism which inhibits the wheel from rotating in interlock with the seat link mechanism, when the seat is raised from the lowered position to the raised position; a leg link mechanism which drives the footrest in a vertical direction between a lift-up position and a grounded position; and the seat link mechanism is configured to move in interlock with the leg link mechanism to drive the seat from the lowered position to the raised position when the footrest is lowered in a grounded direction.
  • the wheel when the user stands up and the seat rises, the wheel is automatically braked in interlock with the rising motion of the seat. Therefore, the user can be prevented from becoming unstable by a movement of the wheelchair made when the user stands up.
  • FIG. 1 to FIG. 9 show a first embodiment of the present invention.
  • FIG. 1 is a front view of a wheelchair 1
  • FIG. 2 is a side view thereof.
  • the wheelchair 1 comprises a body 2 as a main body.
  • the body 2 is structured by coupling a pair of side frames 3 formed in the shape of a rectangular frame in parallel to keep a predetermined distance therebetween by transverse pipes 4.
  • the body 2 may has the structure in which the pair of side frames 3 are coupled to be foldable in a width direction by links instead of the transverse pipes 4. That is, the body 2 may be foldable flat in the width direction.
  • Front wheels 6 are provided at the lower parts of pipes at the front ends of the pair of side frames 3, and rear wheels 7 are provided at intermediate parts of pipes at the back ends.
  • the front wheels 6 and the rear wheels 7 contact a floor F, which is a contact patch.
  • support arms 8 are attached to be horizontally rotatable.
  • the front wheels 6 are rotatably attached to the support arms 8. The wheelchair 1 can thereby change the direction of travel by means of the front wheels 6.
  • the pipes at the backs ends of the pair of side frames 3 extend upward, and their upper ends are bent backward. To the ends of bent portions of the pipes, grips 9 gripped when a helper drives the wheelchair 1 are attached.
  • brake levers are provided near the grips 9. If the helper grips the brake levers when operating the wheelchair 1, the rear wheels 7 can be braked.
  • a canvas 10 which is a cloth constituting the back as indicated by a chain line in FIG. 1 , for example, is stretched between a pair of pipes extending upward at the back ends of the pair of side frames 3 to be attachable and detachable.
  • a cushion body may be provided instead of the canvas 10.
  • the top surfaces of both the ends in the width direction of the body 2, that is, the upper ends of the pair of side frames 3, are provided with armrests 11 whose side shape is an L-shape, respectively.
  • ends of the armrests 11 are coupled to the upper ends of the pipes at the front ends of the side frames 3, and the other ends are coupled to intermediate parts of portions extending upward of the pipes at the back ends of the side frames 3.
  • the pipes at the front ends of the side frames 3 and the armrests 11 may be integrally formed of the same pipes.
  • a first link mechanism 12 which is a leg link mechanism, is provided on each front end side of the pair of side frames 3, that is, the front side of the body 2.
  • the first link mechanism 12 comprises a first link 13, one end of which is pivotally attached to an intermediate part in the height direction of the front ends of the side frames 3, and a second link 14 having the same length as the first link 13, one end of which is pivotally attached above the first link 13.
  • first link 13 and the second link 14 are pivotally attached to a pair of coupling members 15a attached to a fixed cylinder 21 of a height adjustment mechanism 17, which will be described later, to keep the same distance therebetween as that between the one end of the first link 13 and the one end of the second link 14. That is, the first link 13 and the second link 14 are coupled in parallel or substantially in parallel.
  • the height adjustment mechanism 17 comprises the fixed cylinder 21 coupled and fixed to the first and second links 13 and 14 as shown in FIG. 4 .
  • the lower end of the fixed cylinder 21 is open, and in the fixed cylinder 21, a movable cylinder 22 projecting from the lower end is inserted to be slidable.
  • the movable cylinder 22 is inserted a height adjustment shaft 24 which comprises a male screw portion 24a at a lower end onto which a locknut 23 is screwed.
  • a pressure member 25 whose bottom surface is formed as an inclined surface 25a is eccentrically coupled.
  • the upper end of the movable cylinder 22 is formed as an inclined surface 22a at an angle corresponding to that of the inclined surface 25a of the pressure member 25.
  • the movable cylinder 22 By sliding the movable cylinder 22 on the fixed cylinder 21 for a predetermined projection length with the locknut 23 loosened, and screwing the locknut 23 at that position, the movable cylinder 22 can be fixed to project for a predetermined length from the lower end of the fixed cylinder 21. That is, the height adjustment mechanism 17 has a function to set the vertical length dimension which is configured with the fixed cylinder 21 and the movable cylinder 22.
  • support shafts 27 are attached horizontally and forward in the back-and-forth direction of the body 2.
  • Receivers 29, which are provided at end portions of the footrests 18 in the width direction, are rotatably attached to the support shafts 27. The footrests 18 are thereby attached to rotate in the width direction of the body 2 as indicated by arrows r in FIG. 1 .
  • the footrests 18 can rotate between a horizontal state in which they are fallen inward in the width direction of the body 2 as shown in FIG. 1 , and a state in which they stand substantially vertical by being rotated outward in the width direction, and can be held in each of the states.
  • non-slip members 31 formed as plates of materials having a high coefficient of friction such as rubber or resin as non-slip means are stuck. If the user weights his or her feet placed on the footrests 18 when standing up as will be described later, the first link mechanism 12 is worked by the weight, and the pair of footrests 18 are lowered as shown in FIG. 5 .
  • the non-slip members 31 provided on the bottom surfaces of the lowered footrests 18 are pressed against the floor F. That is, the footrests 18 are vertically lowered in a horizontal state, and thus, the whole bottom surfaces where the non-slip members 31 are provided contact the floor F.
  • the wheelchair 1 is thereby prevented from slipping on the floor F when the user stands with the footrests 18 lowered. That is, when the user stands up from the wheelchair 1, the user's pose can be prevented from becoming unstable because of a slip of the wheelchair 1.
  • the height adjustment mechanism 17 is slantingly attached to the second links 14 and 15, such that its lower end is located a little more forward than when it is vertical. Therefore, the bottom surfaces of the footrests 18 are formed as inclined surfaces 18a, such that the whole bottom surfaces of the non-slip members 31 contact the floor F when the footrests 18 are lowered.
  • the bottom surfaces of the footrests 18 may be formed into a shape having a high coefficient of friction, for example, rough surfaces.
  • a rectangular seat 32 is provided to be movable up and down by means of a second link mechanism 33 as a seat link mechanism.
  • the second link mechanism 33 comprises a fourth link 34, one end of which is pivotally attached to the same portion as one end of the second link 14 of the first link mechanism 12.
  • the fourth link 34 rotates integrally with the second link 14.
  • the second link 14 and the fourth link 34 may not be separate but integrally formed in a state in which the fourth link 34 is bent from one end of the second link 14 at a predetermined angle, such that a boundary therebetween is pivotally attached to the pipes at the front ends of the side frames 3.
  • the other end of the fourth link 34 extends toward the back of the body 2, and is pivotally attached to a portion on the front end side of the seat 32, namely a side portion at the front end in the present embodiment.
  • a fifth link 35 To a side portion on the back end side of the seat 32, one end of a fifth link 35, the other end of which is pivotally attached to a higher position than one end of the fourth link 34 closer to the back end side than the fourth link 34 on the top surface of the body 2, is pivotally attached.
  • the fifth link 35 is set in the same length as the fourth link 34.
  • the fourth link 34 and the fifth link 35 rotate in the same direction.
  • the seat 32 is driven in a direction in which it is raised from the top surface of the body 2 while being inclined to become lower toward the front as shown in FIG. 5 , or in a direction in which it is lowered to be horizontal as shown in FIG. 7 from a raised state.
  • the first link mechanism 12 and the second link mechanism 33 can be worked by applying external force.
  • the weights of the seat 32 and the footrests 18 are set, such that in a state in which no load (i.e., external force) is added to the footrests 18 and the seat 32, the seat 32 is lowered to the lower limit by the second link mechanism 33 as shown in FIG. 2 , and the footrests 18 are lifted to the upper limit by the first link mechanism 12.
  • the footrests 18 can be displaced downward as shown in FIG. 5 .
  • Either of the fourth and fifth links 34 and 35 of the second link mechanism 33 may be urged by an urging means such as a gas spring or a spring in a direction in which the seat 32 is raised, which is a direction in which the fourth and fifth links 34 and 35 stand up.
  • an urging means such as a gas spring or a spring in a direction in which the seat 32 is raised, which is a direction in which the fourth and fifth links 34 and 35 stand up.
  • the seat 32 is lowered against urging force of the urging means, and the footrests 18 are lifted.
  • the seat 32 pushes the user's buttocks upward by urging force of the urging means.
  • the user is assisted in standing.
  • the rear wheels 7 can be prevented from rotating, that is, can be braked by brake mechanisms 41.
  • the brake mechanisms 41 each comprise a base member 42 in the shape of a flat plate drooping along the back-and-forth direction on one side at the upper part on the front end side of the body 2 as shown in FIG. 3 .
  • a guide long hole 43 is formed along the back-and-forth direction.
  • a slide link 44 is provided by engaging a guide pin 45 provided at its intermediate part in the longitudinal direction, such that it is slidable.
  • the guide pin 45 comprises a head having a greater diameter than the width of the guide long hole 43. The guide pin 45 is thereby prevented from coming out of the guide long hole 43.
  • an engagement pin 46 is provided at one end of the slide link 44. With the engagement pin 46, a tip portion of a rotation link 47 engages.
  • the tip portion (the other end) of the rotation link 47 is formed as a tapered surface 47a having a tapered shape.
  • an attachment member 48 is provided on the front end side of the base material 42 .
  • a proximal end (one end) of the rotation link 47 is pivotally attached by a support shaft 48a. That is, the rotation link 47 and the support shaft 48a are integrated, and the support shaft 48a is rotatably attached to the attachment member 48.
  • a proximal end (one end) of a brake link 49 is rotatably attached to an intermediate part of the attachment member 48.
  • a tip portion of the brake link 49 faces the outer peripheral surfaces of the rear wheels 7, and at its tip (the other end), a brake member 51 is provided.
  • first interlock link 52 is coupled integrally, that is, such that it rotates together with the support shaft 48a.
  • second interlock link 53 is pivotally attached to an intermediate part of the brake link 49. The other end of the first interlock link 52 and the other end of the second interlock link 53 are pivotally attached to each other.
  • the first interlock link 52 and the second interlock link 53 bend in a V-shape as shown in FIG. 3 when the seat 32 is located at a lowered position, and are substantially straight as shown in FIG. 6 when the seat 32 is located at a raised position.
  • one end of the fourth link 34 which couples the seat 32 to the body 2, is pivotally attached to a lower position of the body 2 than one end of the fifth link 35.
  • the fourth link 34 and the fifth link 35 are not in a parallel state.
  • the seat 32 is raised as shown in FIG. 5 and FIG. 6 , the seat 32 is inclined to become lower toward the front.
  • the fourth link 34 and the fifth link 35 may be formed in parallel, such that the seat 32 is raised in a horizontal state.
  • both the ends of the fourth link 34 and the fifth link 35 of the same length may be pivotally attached to the same height positions of the body 2 and the seat 32, respectively, such that they are parallel to each other.
  • the seat 32 can move up and down in a horizontal state when the fourth link 34 and the fifth link 35 are rotated.
  • one end of a first transmission link 54 is coupled, such that it rotates on the same fulcrum as that of the fifth link 35, and further, integrally with the support shaft 55.
  • first transmission link 54 To the other end of the first transmission link 54, one end of a second transmission link 56 is pivotally attached. The other end of the second transmission link 56 is pivotally attached to the other end of the slide link 44.
  • the first transmission link 54 and the second transmission link 56 thereby constitute a transmission means which transmits the movement (rotational movememt) of the fifth link 35 made when the seat 32 is raised and lowered to the slide link 44.
  • a base end of an operation lever 61 is coupled to rotate integrally with the rotation link 47.
  • the operation lever 61 can be thereby rotated between a state in which it stands substantially vertical as shown in FIG. 2 and FIG. 3 and a state in which it is inclined toward the front of the body 2 as shown in FIG. 5 and FIG. 6 .
  • the second link mechanism 33 moves in interlock with the working.
  • the fourth link 34 in a inclined state as shown in FIG. 3 rotates in a rising direction as shown in FIG. 6 in interlock with the rotating motion of the second link 14 of the first link mechanism 12, and the fifth link 35 moves in interlock with the rotating motion of the fourth link 34 via the seat 32.
  • the seat 32 is thereby raised while being inclined to become lower toward the front as shown in FIG. 5 and FIG. 6 .
  • the first transmission link 54 moves in interlock with the rotating motion.
  • the first transmission link 54 rotates counterclockwise as indicated by arrow a in FIG. 3 integrally with the fifth link 35 with the support shaft 55 functioning as a fulcrum.
  • the second transmission link 56 When the first transmission link 54 rotates, the second transmission link 56, one end of which is coupled to the first transmission link 54, moves in the rotation direction of the first transmission link 54, that is, a direction indicated by arrow b in FIG. 3 .
  • the slide link 44 coupled to the second transmission link 56 moves in interlock with the movement.
  • FIG. 6 shows a state in which the slide link 44 has slid.
  • the first interlock link 52 and the second interlock link 53 which have been bent in a V-shape as shown in FIG. 3 , thereby become substantially straight with the support shaft 48a as a starting point as shown in FIG. 6 .
  • the brake link 49 an intermediate part of which is pivotally attached to one end of the second interlock link 53, rotates counterclockwise with its proximal end pivotally attached to the attachment member 48 functioning as a fulcrum as indicated by arrow d in FIG. 6 .
  • the non-slip members 31 provided on the bottom surfaces of the footrests 18 are pressed against the floor F.
  • the brake link 49 is thereby pressed by the second interlock link 53, and rotates.
  • the brake member 51 provided at the tip of the brake link 49 is pressed against the outer peripheral surfaces of the rear wheels 7, and the brakes are applied.
  • the brakes can be applied by working the brake mechanisms 41 to prevent the wheelchair 1 from moving.
  • the operation lever 61 is rotated clockwise in a direction opposite to that indicated by arrow e in FIG. 8 .
  • the first interlock link 52 and the second interlock link 53 which have been substantially straight, are thereby bent in a V-shape, and thus, the brakes applied by the brake link 49 can be released.
  • the first link mechanism 12 and the second link mechanism 33 thereby work, and the slide link 44 slides in a direction indicated by arrow f in FIG. 8 .
  • rotation link 47 is rotated in advance counterclockwise, and the engagement pin 46 provided at one end of the slide link 44 and the tip portion of the rotation link 47 are separated.
  • the operation lever 61 which is inclined toward the front of the body 2, is rotated clockwise in a direction opposite to that indicated by arrow e in FIG. 8 , that is, in a rising direction.
  • the first interlock link 52 and the second interlock link 53 which have been straight, are thereby bent in a V-shape as shown in FIG. 3 , and the brake link 49 can be rotated in a direction in which the brake member 51 at its tip is separated from the rear wheels 7. Thus, the brakes on the rear wheels 7 are released.
  • the wheelchair 1 having the above-described structure, when the user places his or her feet on the footrests 18 and stands up while lowering the footrests 18, the seat 32 is raised in interlock with the rising motion of the footrests 18.
  • the brake mechanisms 14 work in interlock with the raising motion, and turning of the rear wheels 7 of the wheelchair 1 is prevented. That is, when the user stands up from the wheelchair 1, the rear wheels 7 are automatically braked.
  • the wheelchair 1 does not move, and thus, the user can maintain standing posture with stability.
  • the brake mechanisms 41 can be worked by operating the operation lever 61, even when the user is sitting in the seat 32. Thus, for example, if the user rests, sitting in the seat 32, the wheelchair 1 can be prevented from accidentally moving by operating the operation lever 61 and braking the wheelchair 1.
  • the operation lever 61 which is inclined toward the front of the body 2 as shown in FIG. 8 , is manually rotated into a substantially vertical state as shown in FIG. 3 .
  • the brake link 49 is thereby rotated, and the brakes on the rear wheels 7 can be released. That is, even if the user sits in the seat 32, the wheelchair 1 does not accidentally move unless the operation lever 61 is operated.
  • a height at which the seat 32 is raised can be changed by adjusting a length for which the movable cylinders 22 of the height adjustment mechanisms 17 project from the fixed cylinders 21.
  • a sliding distance of the slide link 44 increases.
  • the lower end of the rotation link 47 is formed as the tapered surface 47a.
  • the engagement pin 46 provided in the slide link 44 slides along the tapered surface 47a, and thus, the raising motion of the seat 32 is not inhibited. That is, the elevation height of the seat 32 can be increased in accordance with the length of the tapered surface 47a.
  • FIG. 10 and FIG. 11 show a wheelchair 1B according to a second embodiment of the present invention.
  • the present embodiment is a modification of the second link mechanism 33 of the first embodiment.
  • the same portions as those of the first embodiment are given the same symbols, and explanations thereof are omitted.
  • the second link mechanism 33 of the present embodiment is composed of one interlock link 63, one end of which is coupled and fixed to the bottom surface on the front end side of the seat 32 at a predetermined angle of inclination.
  • the other end of the interlock link 63 is integrally attached to one end of the second link 14 of the first link mechanism 12, which is pivotally attached to the upper part on the front end side of the body 2. That is, the interlock link 63 rotates integrally with the second link 14.
  • the interlock link 63 is formed separately from the second link 14; however, they may be integrated, that is, may be continuously and integrally formed in a state in which the second link 14 and the interlock link 63 are bent, such that a boundary at which they are bent is pivotally attached to a front end portion of the side frame 3.
  • a pressing arm 64 At a portion where the second link 14 and the interlock link 63 are pivotally attached to each other, a pressing arm 64, one end of which is coupled thereto, is provided to rotate integrally with the interlock link 63. The other end of the pressing arm 64 engages with an interlock pin 65 provided at the tip of the slide link 44.
  • the slide link 44 is formed longer than the slide link 44 of the first embodiment so that the other end of the pressing arm 64 engages with the interlock pin 65.
  • the engagement pin 46 which engages with a tip portion of the rotation link 47, is provided closer to the back end side than the interlock pin 65, and the guide pin 45, which engages with the guide long hole 43 formed in the base material 42, is provided closer to the back end side than the engagement pin 46.
  • the wheelchair 1B having the above-described structure, in a state in which the seat 32 is sunk and the footrests 18 are raised as shown in FIG. 10 , if the user sits in the seat 32 and stands with his or her feet placed on the footrests 18, the footrests 18 falls, and the seat 32 moves in interlock with the falling motion.
  • the seat 32 thereby rotates in a direction in which its back is raised with the front end side functioning as a fulcrum as shown in FIG. 11 . That is, the seat 32 is rotated and raised slantingly.
  • the pressing arm 64 rotates the one end of which in the backward direction with the other end functioning as a fulcrum, and the tip portion, which is the one end of the pressing arm 64, presses the interlock pin 65 provided at the tip portion of the slide link 44.
  • the seat 32 When the user sits in the seat 32, which is rotated and raised as shown in FIG. 11 , the seat 32 rotates in a flattened direction together with the interlock link 63 constituting the second link mechanism 33. At that time, the second link mechanism 33 moves in interlock with the rotating motion of the seat 32, and the footrests 18 are lifted up.
  • the brake link 49 does not move in interlock with the raising motion of the seat 32 and the lifting motion of the footrests 18, the rear wheels 7 remain in a braked state. That is, the brakes on the rear wheels 7 are not released simply by the user's sitting in the wheelchair 1B, which is braked. Therefore, even if the user sits in the wheelchair 1B, the wheelchair 1B does not move accidentally.
  • the brake link 49 can be thereby rotated in a direction in which the brake member 51 is separated from the rear wheels 7, and thus, the brakes on the rear wheels 7 can be released.
  • the wheelchair 1B can be prevented from accidentally moving by the user's sitting therein. Moreover, when the user stands up from the seat 32 after lowering the footrests 18 and raising the seat 32, the rear wheels 7 are automatically braked. Therefore, even if the user stands up while grasping the body 2, the body 2 does not accidentally move.
  • FIG. 12 to FIG. 14 show a third embodiment of the present invention.
  • a wheelchair 1C of the third embodiment is a modification of the wheelchair 1 of the first embodiment.
  • the same portions as those of the first embodiment are given the same symbols, and explanations thereof are omitted.
  • the footrests 18 are provided on the front end side of the body 2 to be movable up and down.
  • footrests 18A are provided on the front end side of the body 2 to be not movable up and down, but are fixedly provided on the body 2.
  • a pair of support members 71 (only one of which is shown in the figures) formed by bending pipe materials in a reverse L-shape is provided to project forward.
  • the footrests 18A are attached to the lower ends of the support members 71.
  • coupling pipes 72 are provided, and the coupling pipes 72 are inserted and fixed in the lower ends of the support members 71.
  • a height at which the footrests 18A are attached can be changed by adjusting a length for which the coupling pipes 72 are inserted in the support members 71.
  • the footrests 18A are used in a state in which they are flattened horizontal to the width direction of the body 2, and when not used, they are rotated outward in the width direction of the body 2, and can be held in a state in which they stand substantially vertical.
  • the seat 32 on the top surface side of the body 2 is provided to be movable up and down by means of the second link mechanism 33 as a seat link mechanism having the same structure as in the first embodiment.
  • the seat 32 can move up and down by means of the second link mechanism 33 between a raising state in which it is inclined to become lower toward the front as shown in FIG. 12 and a lowering state in which it is a horizontal state as shown in FIG. 13 .
  • An attachment piece 73 is provided at a portion on the bottom surface side of the seat 32 on the back end side of the side frames 3, and a spring 74 as an urging means is stretched between the attachment piece 73 and the first transmission link 54 of the second link mechanism 33.
  • the first transmission link 54 is elastically urged by the spring 74 counterclockwise as indicated by arrow m in FIG. 12 .
  • the urging means is not limited to the spring 74, and may be, for example, a gas spring. In short, it may be anything that can elastically urge the second link mechanism 33 in a direction in which the seat 32 is raised.
  • the first transmission link 54 When the first transmission link 54 is urged by the spring 74 in the direction indicated by arrow m, the first transmission link 54 is rotated by the urging force counterclockwise as indicated by arrow m with one end integrally coupled to the fifth link 35 functioning as a fulcrum as shown in FIG. 12 .
  • the fifth link 35 rotates and uprights counterclockwise as indicated by arrow n in the figure, that is, a upward direction, in interlock with the rotating motion.
  • the seat 32 is thereby raised and held, elastically in a raised state in which it is inclined to become lower toward the front by the urging force of the spring 74 as shown in FIG. 12 , that is, in the raised state in which the seat 32 can be lowered against the urging force of the spring 74.
  • the seat 32 in a state in which no external force such as the weight of the user is added to the seat 32, the seat 32 is elastically held at a position where it is raised by the urging force of the spring 74.
  • the first transmission link 54 When the first transmission link 54 is rotated by the spring 74 in the direction indicated by arrow m, the first transmission link 54 slides the slide link 44 from the state shown in FIG. 13 in a direction indicated by arrow p in FIG. 12 via the second transmission link 56.
  • the rotation link 47 is thereby rotated by the engagement pin 46 provided in the slide link 44 counterclockwise as indicated by arrow s in FIG. 12 .
  • the rotation link 47 rotates in the direction indicated by arrow s
  • the first interlock link 52 rotates in interlock with the rotation.
  • the first interlock link 52 and the second interlock link 53 which have been bent in a V-shape as shown in FIG. 13 , become substantially straight as shown in FIG. 12 .
  • the brake link 49 an intermediate part of which is pivotally attached to one end of the second interlock link 53, thereby rotates with its one end functioning as a fulcrum, and the brake member 51 provided at its tip portion, which is the other end, is pressed against the outer peripheral surfaces of the rear wheels 7. That is, the rear wheels 7 are braked.
  • the fourth link 34 and the fifth link 35 of the second link mechanism 33 are rotated in a rising direction by the urging force of the spring 74.
  • the seat 32 is thereby raised in a state in which it is inclined to become lower toward the front.
  • FIG. 13 shows a state in which the seat 32 is lowered.
  • the engagement pin 46 which is provided at a tip portion in a sliding direction of the slide link 44, does not engage with the rotation link 47, and thus, the rotation link 47 is not rotated in the sliding direction of the slide link 44.
  • the brake member 51 provided at the tip portion of the rotation link 47 is pressed against the outer peripheral surfaces of the rear wheels 7, and a state in which the rear wheels 7 are braked is maintained.
  • the operation lever 61 inclined toward the front of the body 2 as shown in FIG. 13 is rotated backward in a standing direction as shown in FIG. 14 .
  • the first interlock link 52 and the second interlock link 53 which have been substantially straight as shown in FIG. 13 , are thereby bent substantially in a V-shape as shown in FIG. 14 , and the brake link 49 is rotated in a direction in which the brake member 51 provided at its tip is separated from the rear wheels 7. That is, the brakes on the rear wheels 7 are released, and thus, the user can drive the wheelchair 1C.
  • the second link mechanism 33 by which the seat 32 is attached on the top surface side of the body 2 to be movable up and down, is urged by the spring 74, and the seat 32 is elastically held at the raised position by means of the urging force.
  • the brake member 51 provided at the brake link 49 is pressed against the rear wheels 7 to cause a braked state. Even if the user sits in the seat 32 and lowers the seat 32 in this state, the brakes on the rear wheels 7 are not released.
  • the rear wheels 7 are braked, and thus, the wheelchair 1C does not accidentally move. Accordingly, the user can sit in the seat 32 securely.
  • the wheelchair 1C does not move unless the user sits in the seat 32 and releases the brakes on the rear wheels 7. Also for this reason, the wheelchair 1C can be surely prevented from accidentally moving.
  • the second link mechanism 33 which is elastically urged upward by the spring 74, is worked and the rear wheels 7 can be automatically braked, even if the footrests 18 are not configured to move up and down by means of the first link mechanism 12 as in the first embodiment. Accordingly, the structure for braking the rear wheels 7 can also be more simplified than in the first embodiment.
  • the seat 32 Since the seat 32 is urged upward by the spring 74, the seat pushes the user's buttocks upward by restoring force of the spring 74 when the user sitting in the seat 32 stands up. Therefore, the user can also stand up from the seat with relative ease.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Handcart (AREA)
EP15880052.4A 2015-01-29 2015-09-08 Wheel chair Active EP3251649B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2015014960 2015-01-29
JP2015095408A JP6263497B2 (ja) 2015-05-08 2015-05-08 車椅子
JP2015095407A JP6263496B2 (ja) 2015-01-29 2015-05-08 椅子
PCT/JP2015/075470 WO2016121158A1 (ja) 2015-01-29 2015-09-08 車椅子

Publications (3)

Publication Number Publication Date
EP3251649A1 EP3251649A1 (en) 2017-12-06
EP3251649A4 EP3251649A4 (en) 2018-09-12
EP3251649B1 true EP3251649B1 (en) 2020-03-18

Family

ID=56937393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15880052.4A Active EP3251649B1 (en) 2015-01-29 2015-09-08 Wheel chair

Country Status (4)

Country Link
EP (1) EP3251649B1 (zh)
CN (1) CN106029033B (zh)
DE (1) DE112015000353T5 (zh)
HK (1) HK1224170A1 (zh)

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ES2736962A1 (es) * 2018-07-03 2020-01-09 Diaz Miguel Angel Vega Asiento compensado
CN109806079B (zh) * 2019-03-28 2020-09-15 吉林大学 一种智能医疗轮椅
CN111281687B (zh) * 2020-03-17 2024-05-10 德尼尔科环境技术(苏州)有限公司 一种多功能轮椅
BE1028309B1 (nl) * 2020-05-11 2021-12-17 Vincent Haelvoet Meubel
CN111557806A (zh) * 2020-05-20 2020-08-21 中山市浩雅生物科技有限公司 一种骨外科用护理架

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Publication number Priority date Publication date Assignee Title
EP0159562B1 (de) * 1984-04-06 1988-12-28 Levo AG Dottikon Aufrichtstuhl
JP2569070Y2 (ja) * 1991-06-05 1998-04-22 多比良株式会社 車椅子
US5513867A (en) * 1993-08-24 1996-05-07 University Of Utah Seat-lift wheelchair
GB9420166D0 (en) * 1994-10-06 1994-11-23 Pennington Richards Cyril M Wheelchair
JP2006204606A (ja) * 2005-01-28 2006-08-10 Ryobi Ltd 車椅子
JP2006320483A (ja) * 2005-05-18 2006-11-30 Ryobi Ltd 車椅子
JP2007020810A (ja) * 2005-07-14 2007-02-01 Aisan Ind Co Ltd 車いす用のフットレスト
DE102007044832A1 (de) * 2007-09-18 2009-04-02 Otto Bock Healthcare Ip Gmbh & Co. Kg Aufrichtrollstuhl
JP3155886U (ja) * 2009-03-11 2009-12-10 巧 三世川 車いす用半自動ブレーキ装置
JP5453360B2 (ja) * 2010-11-24 2014-03-26 フランスベッド株式会社 ブレーキ付き車椅子

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
EP3251649A4 (en) 2018-09-12
CN106029033B (zh) 2020-04-03
HK1224170A1 (zh) 2017-08-18
EP3251649A1 (en) 2017-12-06
DE112015000353T5 (de) 2016-10-06
CN106029033A (zh) 2016-10-12

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