EP3831353A1 - Ensemble de dossier et fauteuil roulant associé - Google Patents

Ensemble de dossier et fauteuil roulant associé Download PDF

Info

Publication number: EP3831353A1
Authority: EP; European Patent Office
Prior art keywords: handle; backrest; cable; tubes; cable guide
Prior art date: 2019-12-04
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.): Granted

Application number

EP19213638.0A

Other languages

German (de)

English (en)

Other versions

EP3831353B1 (fr

Inventor

Michael Knopf

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.)

Sunrise Medical GmbH and Co KG

Original Assignee

Sunrise Medical GmbH and Co KG

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.)

2019-12-04

Filing date

2019-12-04

Publication date

2021-06-09

2019-12-04 Application filed by Sunrise Medical GmbH and Co KG filed Critical Sunrise Medical GmbH and Co KG

2019-12-04 Priority to EP19213638.0A priority Critical patent/EP3831353B1/fr

2021-06-09 Publication of EP3831353A1 publication Critical patent/EP3831353A1/fr

2022-04-27 Application granted granted Critical

2022-04-27 Publication of EP3831353B1 publication Critical patent/EP3831353B1/fr

Status Active legal-status Critical Current

2039-12-04 Anticipated expiration legal-status Critical

Images

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
- A61G5/1067—Arrangements for adjusting the seat adjusting the backrest relative to the seat portion

Definitions

the present invention relates to a backrest assembly for a chair and a wheelchair with such a backrest assembly.
the invention relates to a backrest assembly of a seat of a chair, in particular a wheelchair, comprising: a backrest for supporting the back of a person; two hollow backrest tubes connecting the backrest to the seat, in particular seat frame tubes, on each side of the seat; at least two joints for allowing a movement of the backrest tubes between at least a first end position and a second end position relative to the seat; two locking means for locking and/or unlocking the joints; and at least one hollow handle tube carrying a handle, which is arranged in the middle between the backrest tubes and is mechanically connected to the locking means via cables running substantially inside the hollow tubes.
a chair typically comprises a frame that supports a seat having a seating surface and a backrest, and a plurality of legs.
a wheelchair is a type of chair for allowing the locomotion of a person while this person uses the chair.
the legs of the chair are typically configured as wheels, with a standard type comprising four wheels, wherein two wheels are typically configured as drive wheels.
a chair, in particular a wheelchair often incorporates folding functions that allow the overall size of the chair frame to be reduced in order to store or transport the unoccupied chair.
US 7,100,988 B1 refers to a child's highchair for receiving a child in a seated orientation.
Said chair includes a supporting frame, a seat supported by the frame, and a back connected to the frame wherein the back is movable between a substantially vertical orientation and a rearwardly tilted or reclining orientation.
a release mechanism is integrated into the highchair and includes a release handle, a pair of cable arrangements and securing pins that are movable between a locked position and a released position by manipulation of the release mechanism. With the securing pins in a locked position, the back is fixed in position in a substantially vertical orientation. With the securing pins retracted, the back is able to be moved manually to a reclining position so as to enlarge the included angle between the back and the seat, making it easier to place a child in the highchair.
the object of the present invention to further develop the known backrest assemblies to overcome the drawbacks of the prior art.
the backrest assembly is to be provided with an easy and safe one-handed mechanism to unlock and fold or unfold the backrest with a single grip.
the handle is providing a twist lock, with the twist lock having only one idle position in which the locking means is locked and being adapted to unlock the locking means upon rotation of the handle, and is suited to move the backrest tubes via the joints by pushing or pulling after unlocking, wherein the handle is adapted to be rotated by a user only in one direction, preferably forwards, towards the front of the chair, for unlocking the locking means in any one of the end positions, and the handle is adapted to automatically re-lock after unlocking the locking means and releasing the grip, such that rotating and pushing or pulling of the handle can be achieved by gripping the handle by one hand of an user, without releasing the respective grip of the handle.
each cable comprises a torsion cable, in particular steel torsion cable, and/or each cable is connected to one locking means via an elastic element, in particular in form of a compression spring, being suited to be compressed or expanded within a predetermined range, in particular determined via at least one spring stop, and/or each cable is guided by a cable guide arranged within the handle, and/or each cable is mounted under tension via a cable clamp, preferably by tightening at least one set screw, and/or the two cables guided from the two hollow backrest tubes, preferably via two handle tubes, into the handle are connected to each other via a connection rod.
an elastic element in particular in form of a compression spring
each cable is redirected or deflected inside the handle, preferably up to 90°, via its respective cable guide upon rotation of the handle, preferably up to 30°, against the spring force of the respective elastic element for unlocking the locking means and automatically returned into its idle state upon release of the handle due to the release of the spring force such that the handle automatically returns into its idle position.
each cable guide comprises a cable guide top and a cable guide bottom, and/or each cable guide provides a cable deflection slope, with preferably the slope being provided by a recess and/or a projection, in particular a cable guide recess provided by the cable guide bottom and a cable guide projection provided by cable guide top, and/or the connecting rod is attached between the two cable guides.
the handle comprises a handle top and a handle bottom, and/or the handle has a non-circular cross section, preferably a flattened or oval cross-section, and/or the handle comprises a label, preferably attached to the handle top and the handle bottomand/or facing rearwards, away from the two hollow backrest tubes and the seat and/or for displaying a message, and/or the handle comprises at least one stop element defining the idle position of the handle, with preferably each stop element comprising a projection of the inner wall of the handle bottom and/or the handle top.
Embodiments of the invention can be characterized in that first connecting means, preferably in form of first screws, connecting the connecting rod and the cable guide to the hollow handle tubes, with preferably at least one first screw attaching one end of the connecting rod to one cable guide as well as to one hollow handle tube and at least one other first screw attaching the other, opposite end of the connecting rod to the other cable guide as well as the other hollow handle tube, and/or with preferably at least one first screw entering into one hollow handle tube and passing through the cable guide bottom, the connection rod and the cable guide top to exit the hollow handle tube.
first connecting means preferably in form of first screws, connecting the connecting rod and the cable guide to the hollow handle tubes, with preferably at least one first screw attaching one end of the connecting rod to one cable guide as well as to one hollow handle tube and at least one other first screw attaching the other, opposite end of the connecting rod to the other cable guide as well as the other hollow handle tube, and/or with preferably at least one first screw entering into one hollow handle tube and passing through the cable guide bottom, the connection rod
each first screw provides a stop element cooperating with one stop element of the handle to secure the idle position of the handle.
second connecting means preferably in form of at least one second screw, connecting the handle bottom to the handle top, with preferably two second screws being arranged in the middle of the handle and/or on both sides of the connecting rod, in particular in a region with reduced diameter of the connecting rod.
the handle can only be turned up to 30°, starting from its idle position, and/or the handle can only be turned forwards, starting from its idle position.
the handle is adapted to move an additional device, in particular a seating surface of the chair, a seating frame of the chair, at least one leg, at least one rest and/or at least one wheel of the chair.
At least an actuator in particular comprising a battery, a motor, an electric actuator, preferably an electric motor, a hydraulic actuator, preferably a hydraulic motor, a pneumatic actuator, preferably a pneumatic motor, a thermal actuator, a shape memory alloy, preferably a thermal and/or magnetic shape memory alloy, a mechanical actuator and/or a valve for actuating and/or controlling the movement of the backrest and/or the device.
the accessibility of the handle for unlocking depends on the installation height and can be adapted to the individual needs.
the handle has a hand friendly contour by being non-circular in cross-section, in particular being oval in cross-section.
This oval character can be achieved e.g. by adding a label to the handle with the additional benefit that the label can be used to transport messages like an advertising message or a personalizes message selected by the user of the chair.
the hand-friendly oval contour of the handle results in sufficient installation space inside the handle for guiding and attaching the cables and additional means like stop members and the like.
the connection from the handle to an unlocking part is achieved by the cables, which are preferably in form of steel cables and can be deflected inside the handle by 90° via cable guides. For determining the direction of rotation and avoiding a backlash screws acting as clamping nipples and stop members are used.
inventions provide at least two second joints which allow the movement of the backrest tubes between the second end position and a third end position along a second direction, wherein preferably the first and second direction are substantially different.
Each first and/or second joint can be configured to be adjustable, in particular to adjust the first, second and/or third end position(s), with each joint preferably comprising a plurality of connecting means, preferably in form of holes for at least one transverse screw, and/or stop means.
Each locking means can comprise a wedge and/or can provide an, in particular inclined, guiding plane, with preferably at last one transverse screw being guided along the guiding plane during locking and/or unlocking of the locking means.
a trigger and a locking device can be provided, in particular comprising the elastic means, for locking and/or unlocking the handle.
the trigger can be designed as or can comprise at least one of a hull, a lever, a knob, a button, a latch, a strap, a clamp, a key, a switch and/or a sensor, preferably a force sensor, a tactile sensor, an optical sensor, a sound sensor and/or a fingerprint sensor, and/or is engineered to be effected by at least partly sliding, rotating, squeezing, pushing, pulling and/or touching.
the handle can comprise a sensor, preferably a force sensor, a tactile sensor, an optical sensor, a sound sensor and/or a fingerprint sensor.
the handle backrest tube(s) and/or the handle can comprise an indicator device in addition to the label or in form of the label, for conveying information to the user, wherein preferably the indicator device comprises a display device with at least one light source for emitting light, in particular a LCD, a sound device with at least one loudspeaker for emitting sound, and/or a tactile device for generating a tactile perception.
the indicator device comprises a display device with at least one light source for emitting light, in particular a LCD, a sound device with at least one loudspeaker for emitting sound, and/or a tactile device for generating a tactile perception.
the invention also provides a wheelchair comprising a backrest assembly according to the invention.
FIG. 1 provides an exploded view of a backrest assembly 1 of an embodiment of the invention, with figure 2 providing another exploded view to better show a twist lock 1.1 of the backrest assembly 1.
Said twist lock 1.1 comprises a connecting rod 1.2 connected at opposite ends with backrest tubes 1.13 as well as cable guides each having a cable guide top 1.6 and a cable guide bottom 1.7.
the connecting rod 1.2 has attachment holes 1.21 to be aligned with attachment holes 1.22 of the backrest tubes 1.13 and respective holes extending through the cable guides such that one screw 1.8 can be passed through all three elements, along a screw connection path 1.81 shown in figure 4b , at each end of the connecting rod 1.2.
the cable guides guide pull cables 1.3, with one pull cable 1.2 coming from the left backrest tube 1.13 and the other pull cable 1.3 from the right backrest tube 1.13, and each pull cable 1.3 being held under tension with the help of a cable clamp 1.4 via a set screw 1.5.
the cable clamps 4 are mounted within the twist lock 1.1 between a center handle top 1.9 and a center handle bottom 1.10, at fixed locations, see figure 3 .
the connecting rod 1.2 attached between the two cable guides 1.6, 1.7, which guide the two pull cables 1.3 to the two cable clamps 1.4, is housed between the center handle top 1.9 and the center handle bottom 1.10, which are attached to each other via cap screws 1.12.
a label 1.11 can be attached to the two handle halves 1.9, 1.10 for conveying information for example by carrying an advertisement print, a display device with at least one light source for emitting light, in particular a LCD, a sound device with at least one loudspeaker for emitting sound, and/or a tactile device for generating a tactile perception.
the backrest assembly 1 comprises said two transverse backrest tubes 1.13 connected to the twist lock 1.1 and each one of the two transverse backrest tubes 1.13 guides one pull cable 1.3 from the twist lock 1.1 into a backrest tube 1.14.
the backrest tubes 1.14 are substantially perpendicular to the backrest tubes 1.13 and can be tilted relative to seat frame tubes 1.15, for example from a substantially vertical first position as shown in figure 1 into an inclined second position, via joints comprising a back bracket 4.1 on each side the backrest assembly 1. For enabling such a tilting, or rather a folding and un-folding of the backrest assembly 1 relative to the seat frame tubes 1.15, each pull cable 1.3.
a locking means comprising a back latch 2.3, with a spring 2.2 and a spring stop 2.1 being arranged between the back latch 2.3 and a transverse screw 5.3 carrying rivets 6.2 and secured via a nut 6.3 to the respective backrest tube 1.14.
the transverse screw 5.3, 6.1 not only serves as abutment member for the spring stop 2.1, but also for attachment of the respective back bracket 4.1 such that the backrest tube 1.14 extends into the respective back bracket 4.1 between the two rivets 6.2 and the back latch 2.3 can telescope out of the backrest tube 1.14.
Each back bracket 4.1 is not only attached to one backrest tube 1.14 but also to one seat frame tube 1.15 via cap screws 4.4 with caps 4.2, 4.3.
a further back lock plate 5.1 is not only attached to one backrest tube 1.14 but also to one seat frame tube 1.15 via cap screws 4.4 with caps 4.2, 4.3.
Each back latch 2.3 has an inclined surface due to is wedge shape at its free end which is locked by the transversely extending respective screw 4.5, 5.2 in an idle position of the twist lock 1.1 and can be unlocked by rotating the twist lock 1.1 forwards, i.e. into the plane of figure 1 and towards the backrest tubes 1.14 as well as the seat frame tubes 1.15, to slide along the respective screw 4.5, 5.2 against the force of the respective spring 2.2 being compressed against the spring stop 2.1.
each pull cable 1.3 is mounted under tension via the respective cable clamp 1.4.
each pull cable 1.3 passes its respective cable guide or rather is forced to run within a recess 1.71 provided by the cable guide bottom 1.7 and along a projection 1.6.1 provided by the cable guide top 1.6, see figures 4a to 4c .
rotating the twist lock 1.1 results in rotating the connecting rod 1.2 together with the two cable guides 1.6, 1.7 such that the pull cables 1.3 are redirected or rather deflected inside the handle 1.9, 1.10.
Figure 5a shows the twist lock 1.1 in its idle position with the stop screw 1.8 securing the two cable guide halves 1.6, 1.7 together within the backrest tube 1.13 and resting against a projection 1.101 provided on the inner wall of the handle bottom 1.10.
the stop screw 1.8 disengages from the projection 1.101 as shown in figure 5b , and as soon as said grip is released, the stop screw 1.8 will automatically be rotated back against the projection 1.101 defining the idle position.
twist lock 1.1 will always be in its idle position when the backrest assembly 1 is locked, either in the first or the second position, and can only be rotated in one direction for disengaging the stop screw 1.8 and the projection 1.101 as well as unlocking the back brackets 4.1 for allowing a change of position, either from the first position into the second position or vice versa.
the handle 1.9, 1.10 providing a grip of the twist lock 1.1, has a hand friendly contour by being non-circular in cross-section, in particular being oval in cross-section.
This oval character can be seen in figures 5a and 5b , with both the handle bottom 1.10 and the handle top 1.9 having an u-shaped, flattened cross-section. This shape is made even more ergonomically by the label 1.11 against which the palm of the hand can be applied for gripping the handle 1.9, 1.10.
twist lock handle of the invention is described with respect to unlocking and folding/unfolding a backrest assembly in particular of a wheelchair, but can also be used for moving other parts relative to each other.

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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 For Special Purposes, Such As Reclining Chairs (AREA)

EP19213638.0A 2019-12-04 2019-12-04 Ensemble de dossier et fauteuil roulant associé Active EP3831353B1 (fr)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
EP19213638.0A EP3831353B1 (fr)	2019-12-04	2019-12-04	Ensemble de dossier et fauteuil roulant associé

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
EP19213638.0A EP3831353B1 (fr)	2019-12-04	2019-12-04	Ensemble de dossier et fauteuil roulant associé

Publications (2)

Publication Number	Publication Date
EP3831353A1 true EP3831353A1 (fr)	2021-06-09
EP3831353B1 EP3831353B1 (fr)	2022-04-27

Family

ID=68771570

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP19213638.0A Active EP3831353B1 (fr)	2019-12-04	2019-12-04	Ensemble de dossier et fauteuil roulant associé

Country Status (1)

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EP (1)	EP3831353B1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1319381A2 (fr) *	2001-12-14	2003-06-18	Herbert Brustmann	Chaise mobile à roulettes pour le transport des malades
FR2845893A1 (fr) *	2002-10-21	2004-04-23	Invacare Poirier Sa	Fauteuil roulant comportant un dossier inclinable
US7100988B1 (en)	2004-06-03	2006-09-05	Hyslop William J	Child's highchair with a reclining back
EP3578151A1 (fr) *	2018-06-05	2019-12-11	Sunrise Medical GmbH	Ensemble de dossier et fauteuil roulant correspondant

2019
- 2019-12-04 EP EP19213638.0A patent/EP3831353B1/fr active Active

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1319381A2 (fr) *	2001-12-14	2003-06-18	Herbert Brustmann	Chaise mobile à roulettes pour le transport des malades
FR2845893A1 (fr) *	2002-10-21	2004-04-23	Invacare Poirier Sa	Fauteuil roulant comportant un dossier inclinable
US7100988B1 (en)	2004-06-03	2006-09-05	Hyslop William J	Child's highchair with a reclining back
EP3578151A1 (fr) *	2018-06-05	2019-12-11	Sunrise Medical GmbH	Ensemble de dossier et fauteuil roulant correspondant

Also Published As

Publication number	Publication date
EP3831353B1 (fr)	2022-04-27

Publication	Publication Date	Title
TWI279203B (en)	2007-04-21	Chair with adjustable armrests and backrest
US5195803A (en)	1993-03-23	Reclining seat back assembly for a wheelchair
CN101835407A (zh)	2010-09-15	可调节扶手及其使用方法
CN102258291B (zh)	2013-10-16	具多向使用状态的婴儿承载装置及其操作方法
JP2016529074A (ja)	2016-09-23	折り畳み車いす用の折り畳み機構、車いす用の背もたれ支柱、および車いす
EP3578151B1 (fr)	2022-02-16	Ensemble de dossier et fauteuil roulant correspondant
JP2016529074A5 (fr)	2017-10-12
JP6667019B2 (ja)	2020-03-18	車いすのレッグレストのための装着デバイス
KR101586958B1 (ko)	2016-01-20	분리가능한 리클라이닝 카시트
US4968051A (en)	1990-11-06	Trigger activated device for adjusting the inclination of a back frame of a wheelchair
EP3831353A1 (fr)	2021-06-09	Ensemble de dossier et fauteuil roulant associé
EP2915458B1 (fr)	2016-07-20	Cadre pour support d'enfant
US6676581B1 (en)	2004-01-13	Stretching device for furniture
GB2507834A (en)	2014-05-14	A foldable high chair with a backrest reclining mechanism
US6575531B1 (en)	2003-06-10	Reclining chair with adjustment telescopic tube
JP2015163241A (ja)	2015-09-10	椅子
JP2002119347A (ja)	2002-04-23	椅子
CN115768309A (zh)	2023-03-07	头部支撑组件和头部支撑单元
JP5108412B2 (ja)	2012-12-26	車椅子の座部の長さ調節部材
JP2021036952A (ja)	2021-03-11	椅子
GB2480724A (en)	2011-11-30	A stroller with a head protecting structure
EP1097862B1 (fr)	2005-06-01	Siège inclinable pour bicyclettes
JP6307042B2 (ja)	2018-04-04	椅子
CN222074849U (zh)	2024-11-29	一种配合人体工程学的底盘结构
WO2022139669A1 (fr)	2022-06-30	Dispositif d'assise pour assister un individu dans un meuble d'assise, et meuble d'assise utilisant un tel dispositif d'assise

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