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

Definitions

• the present invention relates to a seat with an integrated verticalization device, in particular with an adjustment of the incidence of the backrest as a function of the morphology of the user.
• the first consequence is the high cost of the finished product and the second is the increase in unreliability, in addition to the inconvenience due to the bulk.
• the verticalization device comprises an armchair comprising a frame, a seat and a back, this seat and this back being hinged together around a transverse articulation axis, called the first axis, means for adjusting the inclination of the backrest relative to the frame, as well as means for tilting the seat forward, around a transverse axis, called the second axis, disposed at the front of this chair, between a low sitting position and a high standing position, and this device is characterized in that the means for adjusting the inclination of the backrest relative to the frame comprise at least one arm of which one of the ends is articulated relative to to this file around a transverse axis, called the third axis, and the other end of which comprises guide means relative to the frame, according to a given stroke profile.
• the guide means comprise at least one cam supported by the frame with a light of given profile, formed in this cam, as well as at least one roller carried by the arm and intended to cooperate with this light .
• An improvement provides for a stop for the travel of the roller in the light, with an adjustable position, so as to limit the inclination of the backrest in the low position of the seat.
• the invention also provides a simple arrangement allowing the mounting of this cam which is pivotable about a transverse articulation axis, called the fourth axis, and which comprises means for adjusting its inclination relative to the frame, around this third axis.
• These means for adjusting the inclination of the cam relative to the frame comprise a nut secured to the cam by an articulation and a screw mounted to freely rotate and fixed in translation relative to the frame, screwing into this nut.
• a particular embodiment is such that the third axis of articulation between the arm and the backrest is arranged, when the chair is in a seated position, below the seat, and the light has a crescent-shaped profile. open towards the front of the chair, so as to give this backrest a movement towards the front then towards the rear, with respect to the frame and the seat.
• the seat tilting means comprise a deformable parallelogram comprising a first link interposed between the seat and one of the ends of a second link, the other end of which is pivotally mounted relative to the frame, as well as a third link interposed between the seat and the second link to form the deformable parallelogram, the front end of the seat being fixed to guide bars, mounted free in vertical translation relative to the frame.
• the verticalization device comprises a single means of operation, interposed between the frame and the seat, designed to raise the seat and rotate it around the second axis.
• the device also includes armrests which are only integral with the seat.
• FIG. 1 is a schematic perspective view of the seat and of the backrest, with the materialization of the different axes of rotation,
• FIG. 2 is a view of the frame intended to receive the seat and the backrest shown in Figure 1
• - Figure 3 is a schematic view of the complete chair in the "seated" position
• FIG. 4 is a view identical to that of FIG. 3, in the "standing" position, and
• FIG. 5 is a detail view of the means for adjusting the inclination of the cams relative to the frame.
• FIG. 1 the seat 10, the backrest 12 is referenced and in FIG. 2, the frame 14.
• the seat 10 comprises a plate 16 shown diagrammatically in a rectangular shape, but which is generally cut and preformed for better user comfort.
• This plate is articulated on its rear part with the backrest 12, around a transverse axis of rotation 18, called the first axis.
• this plate At its front end, this plate is integral with bars 20, articulated around a transverse axis of rotation 22, called the second axis.
• the plate is also supported by two symmetrical deformable parallelograms, each comprising a rear link 24, an arm 26, at the rear end of which this rear link 24 is articulated, about an axis 28, a front link 30, articulated on the arm 26 upstream from its front end, this front end being articulated on the frame, around an axis 32.
• the rear links 24 are articulated relative to the plate about an axis 33.
• Means 34 are also provided for tilting the plate 16 from the seat forward, around the axis 22.
• tilting means 34 comprise a pair of L-shaped levers 36, each articulated at the point of intersection of the branches of the L, with respect to the frame around an axis 38.
• a spacer 40 is interposed between the short arms 5 of the L, near their free ends.
• the free ends of the long branches are mounted articulated with the free ends of two lifting links 42.
• the spacer 40 is equipped with a yoke provided for receiving the free end of the rod 46 of a jack, the body of which is articulated on the frame, as can be seen in FIGS. 3 and 4.
• the file 12 comprises a support element 47 extending by two extension arms 49, the ends of which are mounted articulated each with a tilting arm 50 forming part of the tilting means 52 of this file.
• Each tilting arm 50 carries at its free end a roller 54.
• the means for adjusting the inclination 52 of the backrest further comprise two cams 60, as shown in FIG. 2, which is a plate which includes a light 62, in the shape of a crescent, the opening of which is oriented towards the front.
• This cam 60 is articulated relative to the frame 14, around a transverse axis 64, called the fourth axis.
• Means for adjusting the inclination of this cam 60 around this fourth axis 64 are also provided.
• These adjustment means 66 shown in detail in FIG. 5, comprise a screw 68 mounted free to rotate by relative to the frame and locked in translation, as well as a nut 70, articulated relative to the cam and screwing on the screw 68.
• guide tubes 72 provided for slidingly receive the bars 20, yokes 74 and 76 provided to receive respectively the ends of the arms 26, the straight line passing through the holes of these yokes being coincident with the axis 32 and the levers 34, the right passing through the holes of these yokes being coincident with the axis 38.
• Figures 3 and 4 describe the operation of the device according to the invention and show the advantages listed in the preamble.
• the chair When the user is seated, the chair is in the position shown in Figure 3.
• the rod 46 of the jack 48 is in the extended position and the links 42 hold the seat down.
• the backrest 12 which is linked to the seat is inclined backwards, in the comfort position.
• This inclination is due to the fact that the rollers 54 have moved in the slots 62 until they come into abutment at the bottom of these slots or on an adjustable stop 78, schematically represented in FIG. 3.
• the lever 34 pivots around Tax 38 and the long arm lifts the link 42 which lifts the plate 16 from the seat.
• This plate 16 of the seat pivots around the second axis 22.
• the parallelogram ensures a guided movement of the plate as well as the bars 20, which slide in the guides 72. The plate 16 therefore tends to lift somewhat during pivoting .
• the backrest lifts and, as the length of the tilt adjustment arms 50 is fixed, the rollers roll in the slots 62 which guide these arms and force them backwards in the first part of the movement, which corresponds to one tilting the backrest forward so that the user is assisted by tilting the chest forward.
• the lights tend to recall the tilt adjustment arms forward, which corresponds to a return of the backrest to a position close to the vertical since, simultaneously, the seat s 'is moved regularly and that the seat-back articulation axis, that is to say the axis 18, is located more forward.
• the frame can be completed by accessories known in themselves such as a basin: in this case, the plate 16 of the seat 10 is provided with an opening allowing access to this basin.
• the basin as such is disposed on a suitable support which is not part of the present invention, because within the reach of ordinary skill in the art.
• the embodiment provides a jack of the electric type, this for obvious practical reasons: cleanliness, size, reliability, security by locking in position in the event of a breakdown and low noise emitted during operation.
• an electric actuator is generally connected to the general electricity supply network, but it can easily be supplied by an autonomous source such as a battery.

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)
• Chairs Characterized By Structure (AREA)
• Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Priority Applications (2)

Applications Claiming Priority (1)

Publications (1)

Family

ID=9487977

Family Applications (1)

Country Status (2)

Cited By (4)

Citations (5)

• 1996
  • 1996-02-01 WO PCT/FR1996/000171 patent/WO1997027832A1/fr not_active Application Discontinuation
  • 1996-02-01 EP EP96902324A patent/EP0818983A1/de not_active Withdrawn

Patent Citations (5)

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