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
  • A61G5/1056—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
  • A61G5/1056—Arrangements for adjusting the seat
  • A61G5/1075—Arrangements for adjusting the seat tilting the whole seat backwards

Definitions

• the object of the invention is the lift used primary in wheelchairs for adjusting the positioning of the seat, and simultaneously for changing the positioning of the person sitting in the wheelchair.
• a lift designated for changing the positioning of a seat in a wheelchair where the horizontal frame of the seat consists of a lower and upper part.
• the lower part is rigidly connected with the wheelchair, while the upper part is mobile, making the upright-downright movements.
• the movement of the upper frame is possible due to the operation of arms of the scissor jack connecting both frames.
• the drive of the scissor jack is ensured by an electric actuator, deposited with one end rotationally in the lower frame, and with the second end deposited in one pair of the arms.
• the upper frame While slipping the piston out, the upper frame lifts, while slipping the piston in - the reverse movement is made. Both frames are constantly parallel to each other; the scope of the upright movement is adjustable by slipping the piston out. After slipping the piston in, the frames create a compact flat block. The upper surface of the block is a soft proper seat which is fixed to the upper frame.
• lift preferably for changing the positioning of the seat in a wheelchair has the upper frame of the lift consists of a horizontal stable part, in which a tilt plate is deposited, to which the proper seat is fixed.
• the tilt plate of the upper frame of the lift is deposited with one end rotationally and slidably in the guide in the stable part of the upper frame, whereas the tilt arms are deposited rotationally in the upper frame, deposited with the second end rotationally in the tilt plate.
• the actuator is deposited in the stable part of the upper frame, interacting with the tilt system on the tilt arms.
• the tilt system is the lever permanently fixed to the axis, to which cams with slits are also fixed, where the bolt deposited in the tilt arms is deposited in the slits, whereas the drive of the tilt system is an actuator, deposited with one end rotationally in the stable part of the upper frame and with the second end rotationally deposited in the lever.
• the lifting system is the lever permanently fixes to the axis, to which the cams with slits are permanently fixed. In the slits there is the bolt is deposited in the arms of the scissor jack.
• the drive of the lift system is the actuator, deposited with one end rotationally in the lower frame, and with the second end rotationally deposited in the lift.
• the lift after the assembly has a form of a thin flat block, it is characterized by a high universality and enables the person sitting in the seat a possibility of performing a higher number of operations while compared to the well-known solutions.
• a disabled person may adjust the height of the seat and may be positioned in the position declined to the vertical, i.e. to carry out a treatment, to put sb. on a drip or to increase the comfort of the person during rest.
• the change of the adjustment of the seat, and simultaneously, changing the positioning of the person on the wheelchair prevents the formation of decubitus ulcers, as thanks to the tilting of the seat it is possible to change the direction of the centre of gravity on the disabled person, without the necessity of making any movement by the person - the seat may be titled even by 50°, hence the person may be titled from the seating position to the semi-lying position.
• the lift is a thin block thanks to which the person sitting in the wheelchair has an easy access to the table; the legs may be easily located (put under) under the table top.
• the wheelchair may be used even by heavily ill person, weighting up to 200 kg - it is possible due to a cam construction of the lift and tilt system, thanks to which it is possible to obtain a beneficial low values of the forces acting on the lift systems.
• the lift is very static even when the seat is lifted high, as due to the change of the tilt angle it is easy to adjust the positioning of the centre of gravity of the patient-wheelchair system.
• the elaborated lift may have also other industrial applications, i.e. in transport or production course.
• the object of the invention is show in the execution example on the picture, where the lift with the lifted upper frame and tilted plate was shown from the side view.
• the upper frame I consists of a horizontal stable part 2 and tilt plate 3.
• the tilt plate 3 is rotationally and slidably deposited with bolts 8 in the guides 4 of the stable part 2.
• the second support of the tilt plate 3 is the tilt arms 5 which are connected with the tilt plate 3 rotationally with the use of the bolts 6.
• the tilt arms 5 are deposited with the lower end in the bolt 7, fixed in the stable part 2 of the upper frame 1.
• the tilt system constitutes an actuator 9, deposited with one end rotationally in the stable part 2, and with the second end rotationally fixed with the lever 10.
• the lever 10 is permanently deposited on the axis IT, where also the cam 12 is seated. In the cam 12 there is a slit 13, where the bolt 14 seated in arms 5 is displaced.
• the basis of the lift is the lower frame 16, where the arms ⁇ 7 and 18 of the scissor jack mechanism are rotationally fixed.
• the arms 7 and 1_8 are rotationally fixed in the lower frame 16 as well as in the upper frame 1 - they combine both frames.
• the drive of the scissor jack mechanism is an actuator 19, rotationally deposited on the bolt 20 in the lower frame 16 and with the other end rotationally deposited in the lift 24 on the bolt 25.
• the lift 24 is permanently deposited on the axis 21, fixed rotationally on the bolt 21 in the lower part 16.
• Cams 22 of the lift system are permanently seated on the axis 21.
• the cams 22 have slits 23, where the bolt 26 is deposited, which is permanently seated in the driver arm 18.
• the operation of the lift is the following: when folded, the upper frame I lies on the lower frame 16 - the lift is a flat block of 80mm. While sitting on the wheelchair, the person may adjust the height according to preferences - for that purpose, the person activates the actuator 19, which by pressing against the lift 24 with the use of bolt 25 causes its turn around the axis 21, thus causing the turn of the cams 22 and movement of the bolt 26, positioned in the slit 23 of the cam 22. The movement of the bolt 26 in the slit 23 of the cam 22 causes the movement of the arms 17 and 18, hence also the lifting of the upper frame ]_.
• the stable part 2 of the upper frame I is during lifting constantly parallel to the lower frame 16. For the tilt of the seat from the level, the tilt system 9 is activated.
• the line movement of the actuator 9 causes the rotational movement of the lever 10 of the tilt system and simultaneously the rotational movement of the cams 12 of the tilt system.
• the bolt 14, deposited in the arms 5 is dislocated in the slit 13 in the cams 12 and causes the tilting of the tilt plate 3. Simultaneously, the lower end of the tilt plate 3 slides on the bolts 8 in the guide 4 located in the stable part 2 of the upper frame 1.
• the lift and tilt system act independently from one another, they may be switched on simultaneously or separately one from the other.
• the lift-cam lifting system and the same tilt system cause that the actuator 19 activates the lift mechanism at little force and similarly the actuator 9 activates the tilt mechanism also at a little force.

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)
• Seats For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=47430022

Family Applications (1)

Country Status (2)

Cited By (13)

Citations (4)

• 2011
  • 2011-11-05 PL PL397089A patent/PL397089A1/pl unknown
• 2012
  • 2012-10-26 WO PCT/PL2012/000118 patent/WO2013066198A1/en active Application Filing

Patent Citations (4)

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