EP3050548A1 - Fauteuil élévateur inclinable - Google Patents

Fauteuil élévateur inclinable Download PDF

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Publication number
EP3050548A1
EP3050548A1 EP15153460.9A EP15153460A EP3050548A1 EP 3050548 A1 EP3050548 A1 EP 3050548A1 EP 15153460 A EP15153460 A EP 15153460A EP 3050548 A1 EP3050548 A1 EP 3050548A1
Authority
EP
European Patent Office
Prior art keywords
bar
seat
planar
base
lift chair
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.)
Withdrawn
Application number
EP15153460.9A
Other languages
German (de)
English (en)
Inventor
Cornelis Jacobus Vermeulen
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.)
Meubelfabriek De Toekomst BV
Original Assignee
Meubelfabriek De Toekomst BV
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
Application filed by Meubelfabriek De Toekomst BV filed Critical Meubelfabriek De Toekomst BV
Priority to EP15153460.9A priority Critical patent/EP3050548A1/fr
Publication of EP3050548A1 publication Critical patent/EP3050548A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/034—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest
    • A47C1/035—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movably coupled seat and back-rest, i.e. the seat and back-rest being movably coupled in such a way that the extension mechanism of the foot-rest is actuated at least by the relative movements of seat and backrest
    • A47C1/0355—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movably coupled seat and back-rest, i.e. the seat and back-rest being movably coupled in such a way that the extension mechanism of the foot-rest is actuated at least by the relative movements of seat and backrest actuated by linkages, e.g. lazy-tongs mechanisms
    • 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 invention relates to a reclining lift chair comprising:
  • Such reclining lift chairs are known and are typically usefull for elderly which have difficulty in standing up from a regular chair.
  • the reclining chairs also provide a comfortable sitting position and even a more or less lying position because of the backrest, which can be rotated backwards. Furthermore it is known to provide a leg support which can be rotated upwardly to support the lower legs when the chair is in reclined position.
  • the backrest typically maintains the same angle relative to the seat. This will provide an uncomfortable position for the person standing up out of the chair. It is known to electronically control the angle of the backrest of the chair, while moving toward the standing position, but this result in an additional actuator for controlling the backrest and additional sensors and electronics to synchronize the up and down movement of the seat with the angle of the backrest. This will provide a complex system and increase the costs of such a reclining lift chair.
  • leg support In some chair designs also a leg support needs to be controlled to be able to move the seat up and down. This requires the leg support first to be rotated outwardly, after which the seat can be moved up. However, this rotating of the leg support will hinder the person sitting in the chair and wanting to stand up.
  • the first control rod ensures that a link is present between the first linkage used for guiding the up and down movement of the chair with the second linkage used for controlling the angle between the backrest and the seat. So, when the seat moves up, the first control rod ensures that the angle of the backrest with the seat is also changed, As a result the angle will increase when the seat is moved up, in order to prevent the backrest from pushing the user out of the chair, as could occur in chairs according to the prior art.
  • a four bar linkage is constructed from four links connected in a loop by four one degree of freedom joints, typically a hinged joint.
  • the seventh bar of the second planar four bar linkage comprises a second linear actuator for changing the length of the seventh bar.
  • the leg support provides additional comfort for the user especially in a reclined position.
  • the planar, crossed four bar linkage ensures that even in fully retracted position of the leg support, the leg support will be rotated slightly outwardly when the seat is moved up, in order not to block the movement of the seat in the retracted position of the leg support.
  • the crossed four bar linkage which is linked by the second control rod, provides a smooth and even movement of the leg support, when the seat is moved up and down.
  • the second control rod comprises a third linear actuator for changing the length of the second control rod.
  • the angle between the seat and the leg support is easily controlled for example with a remote control operated by the user.
  • the base comprises a foot rotatable around a rotation axis, which is perpendicular to the hinge axes of at least the first planar four bar linkage.
  • the rotatable foot provides the possiblity of a swivel chair and allows more flexibility in the use of the chair.
  • a further preferred embodiment of the reclining lift chair according to the invention further comprises:
  • the brake lever is controlled to a braking position, when the seat is moved up, while the foot is free to rotate, when the chair is in the sitting position.
  • the path of the hinge point on the second bar of the third control rod during up and down movement of the seat comprises a dead center.
  • the brake lever With the dead center in the path the brake lever can be brought into a braking position, while the seat can move further up. The brake lever will stay in the braking position and will not prevent the chair from moving further in the upward direction.
  • the brake lever comprises a friction layer facing the foot.
  • the friction layer is typically somewhat flexible.
  • the brake lever comprises a ring enveloping the rotation axis of the foot and wherein the hinge axis of the brake lever intersects with the rotation axis.
  • the ring will be tilted around the rotation axis such that on opposite sides of the rotation axis, the ring will engage a friction force. This provides a firmer grip and is independent of any play in any hinge points of the brake lever.
  • Figures 1A and 1B show an embodiment 1 of a reclining lift chair according to the invention.
  • Figure 1A shows the chair 1 in a sitting position
  • figure 1B shows the chair 1 in a standing position.
  • the chair 1 has a seat 2, a backrest 3 and a leg support 4, all supported on a base 5.
  • the base 5 is provide with a foot 6, which is rotatably arranged to the base 5.
  • the angle ⁇ 1 in the sitting position increases to angle ⁇ 2 when the seat 2 is moved up towards the standing position as shown in figure 1B . Also the leg support 4 is tilted to provide space for the linkage system 7.
  • Figure 2 shows a schematic view of the chair of figures 1A and 1B and in particular the linkage system 7.
  • the linkage system 7 has a first planar four bar linkage with which the movement of the seat 2 relative to the base 5 and foot 6 is guided.
  • the first planar four bar linkage has connected in a loop by hinges a first bar 5, being the base 5, a second bar 8, a third bar 9, which is fixedly arranged to the seat 2, and a fourth bar 10. Because the effective length between the respective hinges of the base 5 is larger than the effective length of the third bar, the seat 2 will be tilted when the seat is moved up.
  • the linkage system 7 has furthermore a second planar four linkage having a fifth bar 11, which is fixedly connected to the seat 2, a sixth bar 12, which is fixedly connected to the backrest 3, a seventh bar 13 and an eigth bar 14. Furthermore, a first control rod 15 is arranged between the fourth bar 10 and the eigth bar 14. This control rod 15 ensures that the angle ⁇ 1 is increased to the angle ⁇ 2 when the seat 2 is moved up by the actuator 16, which is arranged between the seat 2 and the base 5.
  • the linkage system 7 has also a planar, crossed four bar linkage comprising a ninth bar 17, which is fixedly arranged to the leg support 4, a tenth bar 18, 19, an eleventh bar 20 and a twelfth bar 21.
  • the tenth 18,19 and twelfth bar 21 are crossed.
  • the tenth bar 18, 19 is in this embodiment provided by two bar parts, but could also be one bar.
  • the bar part 19 is fixedly arranged to the second bar 8.
  • a second control rod 22 is arranged between the base 5 and the eleventh bar 20.
  • Figures 3A and 3B show a first variant of the chair of figure 1 in two positions.
  • the base 5 is rotatable arranged with a foot 6 via axle 24.
  • a brake lever 25 is hingedly arranged with one end to the base 5.
  • the other end of the brake lever 25 is connected to a third control rod 26, which is in turn connected to the second bar 8.
  • Figure 3A shows the position, in which the chair 1 is in standing position.
  • the brake lever 25 is pushed down, such that the brake part 27 of the brake lever 25 is pushed against the axle 24 and rotation is blocked.
  • Figures 4A and 4B show a second variant of the chair 1 of figure 1 in two positions.
  • the brake lever 28 comprises a ring 29, which is arranged around the axle 24.
  • the hinge axis 30 of the brake lever 28 intersects with the rotation axis of the axle 24.
  • control rod 26 will push the brake lever 28 down, when the chair 1 is in standing position. This causes the ring 29 to tilt around the axle 24 and block rotation.
  • the ring 29 is moved to a concentric position relative to the axle 24 to release the axle 24 and allow rotation of the foot 6 relative to the base 5.
  • Figure 5 shows a third variant of the chair 1 of figure 1 .
  • the base 5 is provided with an additional rotation axis 40, with which the base 5 is connected to a second base part 41 to which the foot 6 is rotatably arranged.
  • This additional rotation axis 40 provides a so-called zero gravity reclining function, which allows the chair to tilt backwards as a whole, so seat 2, backrest 3 and leg support 4 together, without much effort of the user of the chair.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dentistry (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
EP15153460.9A 2015-02-02 2015-02-02 Fauteuil élévateur inclinable Withdrawn EP3050548A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15153460.9A EP3050548A1 (fr) 2015-02-02 2015-02-02 Fauteuil élévateur inclinable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15153460.9A EP3050548A1 (fr) 2015-02-02 2015-02-02 Fauteuil élévateur inclinable

Publications (1)

Publication Number Publication Date
EP3050548A1 true EP3050548A1 (fr) 2016-08-03

Family

ID=52446237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15153460.9A Withdrawn EP3050548A1 (fr) 2015-02-02 2015-02-02 Fauteuil élévateur inclinable

Country Status (1)

Country Link
EP (1) EP3050548A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107825412A (zh) * 2017-10-12 2018-03-23 广西大学 一种多构态仿生机器人机构
CN108125431A (zh) * 2017-12-18 2018-06-08 安吉小巨蛋家居有限公司 可折叠按摩椅
WO2023051024A1 (fr) * 2021-09-29 2023-04-06 广东佳居家具有限公司 Siège à fonction de levage électrique

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4007960A (en) * 1975-04-30 1977-02-15 Gaffney Edward J Reclining elevator chair
NL1037909C2 (nl) * 2010-04-22 2011-10-25 Simon Poot Stoel met instelbare zitting en rugleuning.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4007960A (en) * 1975-04-30 1977-02-15 Gaffney Edward J Reclining elevator chair
NL1037909C2 (nl) * 2010-04-22 2011-10-25 Simon Poot Stoel met instelbare zitting en rugleuning.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107825412A (zh) * 2017-10-12 2018-03-23 广西大学 一种多构态仿生机器人机构
CN108125431A (zh) * 2017-12-18 2018-06-08 安吉小巨蛋家居有限公司 可折叠按摩椅
WO2023051024A1 (fr) * 2021-09-29 2023-04-06 广东佳居家具有限公司 Siège à fonction de levage électrique

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