EP2042145B1 - Adjustable legrest for a wheelchair - Google Patents
Adjustable legrest for a wheelchair Download PDFInfo
- Publication number
- EP2042145B1 EP2042145B1 EP07117160A EP07117160A EP2042145B1 EP 2042145 B1 EP2042145 B1 EP 2042145B1 EP 07117160 A EP07117160 A EP 07117160A EP 07117160 A EP07117160 A EP 07117160A EP 2042145 B1 EP2042145 B1 EP 2042145B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chip element
- legrest
- raise
- adjustable
- turn
- 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.)
- Not-in-force
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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
- A61G5/12—Rests specially adapted therefor, e.g. for the head or the feet
-
- 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 an adjustable legrest for a wheelchair, and more particularly to an adjustable legrest provided with a calfrest and a footrest. It also relates to a wheelchair comprising a pair of said adjustable legrests.
- Legrests for wheelchairs are designed to support the lower parts of a user's legs. They comprise a footrest and most often a calfrest for the comfort of the user. For the further comfort of the user, it may be useful to adjust the position of the legrest.
- Such adjustable legrests allowing different slope positions from the vertical to the horizontal are known.
- adjustable legrest with a tiltable mechanism provided at the upper top part of the legrest tube or frame, said tiltable mechanism comprising a release control device with locking pins cooperating with a lock chip provided with a series of holes corresponding to the different desired slope positions of the legrest (see US-A-5689999 ).
- said known devices have not revealed satisfactory.
- the aim of the present invention is therefore to provide an adjustable legrest for a wheelchair wherein the drawbacks of the known adjustable legrests are avoided, which is simple to manufacture and easy to be manipulated.
- the present invention is concerned with an adjustable legrest for a wheelchair as claimed in claim 1. Important features of the adjustable legrest according to the invention are defined in the dependant claims.
- the present invention also concerns a wheelchair comprising a pair of adjustable legrests as claimed in claim 10.
- Each of said legrests is mounted, through an adjustable tilt device 6, 6,' on a connecting device 7, 7' fixed on the front part of the seat frame 8 of the wheelchair.
- the legrest of the present invention is of the type illustrated in Figure 1 , comprising a frame or tube 3, a footrest 4 and a calfrest 5, and is preferably mounted on a connecting device 7 fixed on the front part of the seat frame 8 of the wheelchair through an adjustable tilt device 10 illustrated in Figures 2 to 9 and which will now be described in detail.
- each series of holes 21, 21' comprises eight holes, thus allowing eight differently slope oriented positions of the legrest.
- a number of holes smaller or greater than eight can be choosen, depending on the number of differently oriented positions one wish for the legrest.
- FIG. 2B Also visible in Figure 2B is a screw 40 for the assembly of the adjustable tilt device, thereby firstly locking the connecting device 7 with the lock chip element 20 by means of a first bolt 43 to be screwed on the middle part 41 of the screw 40 and secondly locking the release control device 50 by means of a second bolt 44 to be screwed on the end part 42 of the screw 40.
- the release control device 50 includes a turn chip element 60, a torsion spring 70, a raise chip element 90 provided with the two locking pins 30, 30', a compression spring 80 and a cover 51.
- the raise chip element 90 comprises a main central disc part 91 provided with a central hole 92 and two annular protruding parts 93, 94.
- the external annular part 93 bears two opposite radially extending lateral parts 95, 95' provided at their extremities with recesses 96, 96' intended to cooperate with corresponding grooves 31 provided in the locking pins 30, 30' for the fixation of said locking pins to the raise chip element 90.
- Each of said lateral parts 95, 95' is also provided at its base with a tilt angle surface 97, 97' intended to cooperate with corresponding tilt angle surfaces 67, 67' of the turn chip element 60.
- the external annular part 93 of the raise chip element is provided with four recesses 98, one of which is intended to receive one of the extremities 71 of the torsion spring 70, the other extremity 72 of the torsion spring being hold into a corresponding receiving part 61 (see Figure 5 ) provided at the surface of the turn chip element 60, the central part 73 of the torsion spring being lodged between the two annular parts 93 and 94 of the raise chip element.
- the whole is arranged so that, once mounted in the release control device, the torsion spring is preloaded.
- the raise chip element is further provided with a ring part 99 protruding within its central hole 92 and which is intended to receive one first extremity of a compression spring 80 as will be described below.
- the turn chip element comprises an external annular part 62 with a bottom part 63 in the form of a disc provided with a central hole 64 and a central annular part 65.
- the bottom disc part 63 is provided with two circular openings 66, 66' through which the locking pins 30, 30' can move, and with the two tilt angle gliding surfaces 67, 67' intended to cooperate with the corresponding tilt angle surfaces 97, 97' of the raise chip element 90.
- the outer diameter of the central annular part 65 is smaller than the diameter of the central hole 92 of the raise chip element, and substantially correspond to the internal diameter of the ring 99, so that the raise chip element 90 can be lodged within the turn chip element 60 by introduction of the central annular part 65 of the turn chip element within said hole 92 of the raise chip element, leaving a radial space 69 between them.
- the outer diameter of the annular part 65 of the turn chip element should be choosen to close fit the internal diameter of the ring 99 of the raise chip element. This will make sure that the raise chip element will always remain parallel to the lock chip element.
- the release control device 50 further comprises a compression spring 80 intended to be lodged within the turn chip element 60 around its central annular part 65, once the raise chip element is already lodge therein. Once assembled, a first extremity of the compression spring abuts against the ring 99 of the raise chip element, while its other extremity abuts on the snap locking parts 68, 68' of the central annular part 65 of the turn chip element.
- the user just turns the release control handle 52, which will thus turn the turn chip element 60.
- the tilt angle gliding surfaces 67, 67' provided on the internal bottom surface 63 of the turn chip element will act on the corresponding tilt angle surfaces 97, 97' of the raise chip element, which will raise and lift the two locking pins 30, 30'.
- the two locking pins 30, 30' will thus leave the holes 21, 21' of the lock chip element 20, allowing the legrest tube 3 to be pivoted.
- the torsion spring 30 will force the control release device 50 to its original position.
- the turn chip element 60 will follow the movement and the locking pins 30, 30' lock again into the holes 21, 21' of the lock chip element under the effect of the compression spring 80, thus securing the locking pins into the lock chip element.
- the end parts 32, 32' of the locking pins have a conical shape.
- the holes 21, 21' are oval-shaped, their radial diameter (radial being considered with respect to the center of the lock chip element) being slightly greater than the greater diameter of the end part 32, 32' of the locking pins.
- the manufacture of the release control device according to the present invention is economically cheap. Furthermore, the device is easy to mount and its design allows a great security of functioning when unlocking and locking the locking pins within the lock chip element. In particular, since the locking pins once mounted on the raise chip element are made one piece with the raise chip element and work as a one piece pair, one can be sure that upon locking of the device both locking pins will be engaged in the holes of the lock chip element.
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)
- Passenger Equipment (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
Description
- The present invention relates to an adjustable legrest for a wheelchair, and more particularly to an adjustable legrest provided with a calfrest and a footrest. It also relates to a wheelchair comprising a pair of said adjustable legrests.
- Legrests for wheelchairs are designed to support the lower parts of a user's legs. They comprise a footrest and most often a calfrest for the comfort of the user. For the further comfort of the user, it may be useful to adjust the position of the legrest. Such adjustable legrests, allowing different slope positions from the vertical to the horizontal are known. In particular one have already proposed adjustable legrest with a tiltable mechanism provided at the upper top part of the legrest tube or frame, said tiltable mechanism comprising a release control device with locking pins cooperating with a lock chip provided with a series of holes corresponding to the different desired slope positions of the legrest (see
US-A-5689999 ). However, said known devices have not revealed satisfactory. - The aim of the present invention is therefore to provide an adjustable legrest for a wheelchair wherein the drawbacks of the known adjustable legrests are avoided, which is simple to manufacture and easy to be manipulated.
- In this view the present invention is concerned with an adjustable legrest for a wheelchair as claimed in
claim 1. Important features of the adjustable legrest according to the invention are defined in the dependant claims. The present invention also concerns a wheelchair comprising a pair of adjustable legrests as claimed in claim 10. - Other features and advantages of the present invention will appear more clearly from the detailed description of embodiments of the invention which are presented solely by way of a non-restrictive example and illustrated by the attached drawings in which:
-
Figure 1 is a general view of a wheelchair of the Applicant provided with two adjustable legrests of the prior art; -
Figures 2A and 2B are respectively a three quarter perspective front view from the left and a corresponding exploded view of the upper part of a legrest of the invention; -
Figures 3A and 3B are respectively a three quarter perspective front view from the right side and a corresponding exploded view of the upper part of the legrest ofFigure 2 ; -
Figures 4A, 4B and 4C are respectively a plan view, a side view and a sectional view of the release control device of the tiltable mechanism of the legrest ofFigures 2 and3 ; -
Figure 5 is a three quarter rear view of the release control device ofFigure 4 ; -
Figure 6 is an exploded three quarter front view of the release control device ofFigure 4 ; -
Figure 7 is an exploded three quarter rear view of the release control device ofFigure 4 ; -
Figures 8A and 8B are respectively a side view and a perspective view, partially cut, of the release control device ofFigure 4 cooperating with the lock chip element in the locked position; and -
Figures 9A and 9B are respectively a side view and a perspective view, partially cut, of the release control device ofFigure 4 cooperating with the lock chip element in the unlocked position. - A
wheelchair 1 provided with a pair ofadjustable legrests 2, 2', each of which comprising a frame ortube 3, 3', afootrest 4, 4' and a calfrest 5, 5', is illustrated inFigure 1 . Each of said legrests is mounted, through an adjustable tilt device 6, 6,' on a connectingdevice 7, 7' fixed on the front part of theseat frame 8 of the wheelchair. - The legrest of the present invention is of the type illustrated in
Figure 1 , comprising a frame ortube 3, afootrest 4 and a calfrest 5, and is preferably mounted on a connectingdevice 7 fixed on the front part of theseat frame 8 of the wheelchair through an adjustable tilt device 10 illustrated inFigures 2 to 9 and which will now be described in detail. - One can see in
Figures 2A to 3B the adjustable tilt device 10 connected to theconnecting device 7 and to the upper part of the legrest tube orframe 3. Theconnecting device 7 is provided with connecting elements 9, 9' for its fixation to a corresponding connecting element of the front part of theseat frame 8 of the wheelchair. On the exploded view ofFigure 2B is visible alock chip element 20 provided with two series ofholes 21, 21' intended to receive respectively one of twolocking pins 30, 30' mounted in arelease control device 50 which will be described in detail later. In the embodiment represented each series ofholes 21, 21' comprises eight holes, thus allowing eight differently slope oriented positions of the legrest. Of course a number of holes smaller or greater than eight can be choosen, depending on the number of differently oriented positions one wish for the legrest. Also visible inFigure 2B is ascrew 40 for the assembly of the adjustable tilt device, thereby firstly locking the connectingdevice 7 with thelock chip element 20 by means of afirst bolt 43 to be screwed on themiddle part 41 of thescrew 40 and secondly locking therelease control device 50 by means of asecond bolt 44 to be screwed on the end part 42 of thescrew 40. - As illustrated in
Figures 4 to 7 , therelease control device 50 includes aturn chip element 60, atorsion spring 70, araise chip element 90 provided with the twolocking pins 30, 30', acompression spring 80 and acover 51. As can better be seen inFigures 5 to 7 , theraise chip element 90 comprises a maincentral disc part 91 provided with acentral hole 92 and twoannular protruding parts annular part 93 bears two opposite radially extendinglateral parts 95, 95' provided at their extremities withrecesses 96, 96' intended to cooperate withcorresponding grooves 31 provided in thelocking pins 30, 30' for the fixation of said locking pins to theraise chip element 90. Each of saidlateral parts 95, 95' is also provided at its base with atilt angle surface 97, 97' intended to cooperate with correspondingtilt angle surfaces 67, 67' of theturn chip element 60. The externalannular part 93 of the raise chip element is provided with fourrecesses 98, one of which is intended to receive one of theextremities 71 of thetorsion spring 70, theother extremity 72 of the torsion spring being hold into a corresponding receiving part 61 (seeFigure 5 ) provided at the surface of theturn chip element 60, thecentral part 73 of the torsion spring being lodged between the twoannular parts ring part 99 protruding within itscentral hole 92 and which is intended to receive one first extremity of acompression spring 80 as will be described below. - The turn chip element comprises an external
annular part 62 with abottom part 63 in the form of a disc provided with acentral hole 64 and a centralannular part 65. Thebottom disc part 63 is provided with twocircular openings 66, 66' through which thelocking pins 30, 30' can move, and with the two tiltangle gliding surfaces 67, 67' intended to cooperate with the correspondingtilt angle surfaces 97, 97' of theraise chip element 90. The outer diameter of the centralannular part 65 is smaller than the diameter of thecentral hole 92 of the raise chip element, and substantially correspond to the internal diameter of thering 99, so that theraise chip element 90 can be lodged within theturn chip element 60 by introduction of the centralannular part 65 of the turn chip element withinsaid hole 92 of the raise chip element, leaving aradial space 69 between them. In order to have the raise chip element hinged on the turn chip element, the outer diameter of theannular part 65 of the turn chip element should be choosen to close fit the internal diameter of thering 99 of the raise chip element. This will make sure that the raise chip element will always remain parallel to the lock chip element. - The
release control device 50 further comprises acompression spring 80 intended to be lodged within theturn chip element 60 around its centralannular part 65, once the raise chip element is already lodge therein. Once assembled, a first extremity of the compression spring abuts against thering 99 of the raise chip element, while its other extremity abuts on thesnap locking parts 68, 68' of the centralannular part 65 of the turn chip element. - To release the adjustable legrest, the user just turns the
release control handle 52, which will thus turn theturn chip element 60. When the turn chip element rotates, the tiltangle gliding surfaces 67, 67' provided on theinternal bottom surface 63 of the turn chip element will act on the correspondingtilt angle surfaces 97, 97' of the raise chip element, which will raise and lift the twolocking pins 30, 30'. The twolocking pins 30, 30' will thus leave theholes 21, 21' of thelock chip element 20, allowing thelegrest tube 3 to be pivoted. After adjusting the position of the legrest, when the user releases the release handle 52, thetorsion spring 30 will force thecontrol release device 50 to its original position. Theturn chip element 60 will follow the movement and thelocking pins 30, 30' lock again into theholes 21, 21' of the lock chip element under the effect of thecompression spring 80, thus securing the locking pins into the lock chip element. - In order to facilitate the introduction of the
locking pins 30, 30' into theholes 21, 21', theend parts 32, 32' of the locking pins have a conical shape. Further, theholes 21, 21' are oval-shaped, their radial diameter (radial being considered with respect to the center of the lock chip element) being slightly greater than the greater diameter of theend part 32, 32' of the locking pins. - With a view to the limited number of separate parts and their design, the manufacture of the release control device according to the present invention is economically cheap. Furthermore, the device is easy to mount and its design allows a great security of functioning when unlocking and locking the locking pins within the lock chip element. In particular, since the locking pins once mounted on the raise chip element are made one piece with the raise chip element and work as a one piece pair, one can be sure that upon locking of the device both locking pins will be engaged in the holes of the lock chip element. Another advantage resulting on the one part of the one piece realisation of the locking pins with the raising chip element and on the other part of the conical shape of the
end parts 32, 32' of the locking pins cooperating with the oval-shaped holes 21, 21', is the absence of any problem of fit tolerance, while the locking of the device is very solid. Further, the design of thetilt angle surfaces -
- 1 wheelchair
- 2, 2' legrest
- 3, 3' legrest frame or tube
- 4, 4' footrest
- 5, 5' calfrest
- 6, 6' adjustable tilt device (prior art)
- 7, 7' connecting device
- 8 seat frame
- 9, 9' connecting element
- 10 adjustable tilt device (invention)
- 20 lock chip element
- 21, 21' hole
- 30, 30' locking pin
- 31, 31' groove
- 32, 32' conical end
- 40 screw
- 41 middle part of locking screw
- 42 end part of locking screw
- 50 release control device
- 51 cover
- 52 handle
- 60 turn chip element
- 61 receiving part for torsion spring
- 62 annular part
- 63 bottom part
- 64 central hole
- 65 central annular part
- 66, 66' annular opening
- 67, 67' tilt angle surface
- 68, 68' snap locking part
- 69 radial space
- 70 torsion spring
- 71 extremity
- 72 other extremity
- 73 middle part
- 80 compression spring
- 90 raise chip element
- 91 main central disc part
- 92 central hole
- 93 external annular part
- 94 internal annular part
- 95, 95' lateral part
- 96, 96' recess
- 97, 97' tilt angle surface
- 98, 98' recess
- 99 ring part
Claims (10)
- An adjustable legrest for a wheelchair comprising a release control device (50) comprising at least two locking pins (30, 30') intended to cooperate with a lock chip element (20) provided with a series of holes (21, 21') corresponding to the different desired slope positions of the legrest, characterized in that said locking pins (30, 30') are mounted on a raise chip element (90) provided with at least one tilt angle surface (97, 97') designed to cooperate with at least one tilt angle gliding surface (67, 67') of a turn chip element (60).
- The adjustable legrest of claim 1, wherein said lock chip element (20) is mounted at the top end of the legrest tube (3).
- The adjustable legrest of claim 1 or 2, wherein the turn chip element (20) is made one part with a release control handle (52).
- The adjustable legrest of any one of the preceding claims, further comprising a torsion spring (70) cooperating with both the turn chip element (60) and the raise chip element (90), the whole being arranged to have the raise chip element always returned to its original position.
- The adjustable legrest of any one of the preceding claims, wherein the raise chip element comprises a main central part (91) provided with a central hole (92) and at least two opposite radially extending lateral parts (95, 95') provided with recesses (96, 96') arranged to receive corresponding groove parts (31, 31') of the locking pins (30, 30').
- The adjustable legrest of any one of the preceding claims, further comprising a compression spring (80) acting between the raise chip element (90) and the turn chip element (60) to secure that the locking pins (30, 30') lock into the lock chip element (20).
- The adjustable legrest of the preceding claim, wherein the turn chip element (60) comprises an internal annular part (65) around which is positioned the raise chip element through its central hole (92).
- The adjustable legrest of the preceding claim, wherein the internal annular part (65) of the turn chip element (60) is provided with at least two snap locking parts (68, 68') intended to block the expansion of the compression spring (80) on one of its extremities, while its other extremity abuts on a ring part (99) protruding within said hole (92) of the raise chip element.
- The adjustable legrest of any one of the preceding claims, wherein the raise chip element (90) comprises two annular protruding parts (93, 94) between which is lodged the middle part (73) of the torsion spring (70).
- A wheelchair comprising a pair of adjustable legrests as claimed in any one of the preceding claims.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PT07117160T PT2042145E (en) | 2007-09-25 | 2007-09-25 | Adjustable legrest for a wheelchair |
ES07117160T ES2351109T3 (en) | 2007-09-25 | 2007-09-25 | ADJUSTABLE LEG SUPPORT FOR WHEELCHAIR. |
DK07117160.7T DK2042145T3 (en) | 2007-09-25 | 2007-09-25 | Adjustable legrest for a wheelchair |
AT07117160T ATE475394T1 (en) | 2007-09-25 | 2007-09-25 | ADJUSTABLE LEG REST FOR A WHEELCHAIR |
EP07117160A EP2042145B1 (en) | 2007-09-25 | 2007-09-25 | Adjustable legrest for a wheelchair |
DE602007008101T DE602007008101D1 (en) | 2007-09-25 | 2007-09-25 | Adjustable legrest for a wheelchair |
NO20084073A NO337340B1 (en) | 2007-09-25 | 2008-09-24 | Adjustable footrest for a wheelchair |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07117160A EP2042145B1 (en) | 2007-09-25 | 2007-09-25 | Adjustable legrest for a wheelchair |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2042145A1 EP2042145A1 (en) | 2009-04-01 |
EP2042145B1 true EP2042145B1 (en) | 2010-07-28 |
Family
ID=39032273
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07117160A Not-in-force EP2042145B1 (en) | 2007-09-25 | 2007-09-25 | Adjustable legrest for a wheelchair |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP2042145B1 (en) |
AT (1) | ATE475394T1 (en) |
DE (1) | DE602007008101D1 (en) |
DK (1) | DK2042145T3 (en) |
ES (1) | ES2351109T3 (en) |
NO (1) | NO337340B1 (en) |
PT (1) | PT2042145E (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111956435B (en) * | 2020-08-26 | 2021-07-20 | 牛慧敏 | Portable nursing case of medical care |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2087549A5 (en) * | 1970-05-22 | 1971-12-31 | Cousin Cie Ets A & M Freres | |
US5689999A (en) * | 1995-08-18 | 1997-11-25 | Gunnell, Inc. | Adjustable rotary locking and unlocking apparatus |
-
2007
- 2007-09-25 EP EP07117160A patent/EP2042145B1/en not_active Not-in-force
- 2007-09-25 AT AT07117160T patent/ATE475394T1/en not_active IP Right Cessation
- 2007-09-25 DK DK07117160.7T patent/DK2042145T3/en active
- 2007-09-25 ES ES07117160T patent/ES2351109T3/en active Active
- 2007-09-25 PT PT07117160T patent/PT2042145E/en unknown
- 2007-09-25 DE DE602007008101T patent/DE602007008101D1/en active Active
-
2008
- 2008-09-24 NO NO20084073A patent/NO337340B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ES2351109T3 (en) | 2011-01-31 |
NO20084073L (en) | 2009-03-26 |
DE602007008101D1 (en) | 2010-09-09 |
EP2042145A1 (en) | 2009-04-01 |
NO337340B1 (en) | 2016-03-21 |
DK2042145T3 (en) | 2010-11-22 |
PT2042145E (en) | 2010-11-04 |
ATE475394T1 (en) | 2010-08-15 |
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