EP2893912B1 - Hospital chair with hinged foot support - Google Patents
Hospital chair with hinged foot support Download PDFInfo
- Publication number
- EP2893912B1 EP2893912B1 EP15150409.9A EP15150409A EP2893912B1 EP 2893912 B1 EP2893912 B1 EP 2893912B1 EP 15150409 A EP15150409 A EP 15150409A EP 2893912 B1 EP2893912 B1 EP 2893912B1
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- EP
- European Patent Office
- Prior art keywords
- footrest
- lever
- cam
- rolling
- chassis
- 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.)
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Classifications
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- 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
- A61G5/1005—Wheelchairs having brakes
- A61G5/101—Wheelchairs having brakes of the parking brake type, e.g. holding the wheelchair
-
- 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
- A61G5/1005—Wheelchairs having brakes
- A61G5/1013—Wheelchairs having brakes engaging the wheel
- A61G5/1018—Wheelchairs having brakes engaging the wheel on the running surface
-
- 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
- A61G5/1005—Wheelchairs having brakes
- A61G5/1037—Wheelchairs having brakes manipulated by assisting person
-
- 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
- A61G5/121—Rests specially adapted therefor, e.g. for the head or the feet for head or neck
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- 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
- A61G5/125—Rests specially adapted therefor, e.g. for the head or the feet for arms
-
- 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
-
- 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
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- 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
- A61G5/107—Arrangements for adjusting the seat positioning the whole seat forward or rearward
Definitions
- the invention relates to the field of armchairs, and more particularly the chairs for moving people in a medical environment.
- This type of chair is particularly used in hospitals or retirement homes to allow the transfer of patients by caregivers.
- a medical chair In a hospital environment, a medical chair must allow easy movement of patients while being both robust and easy to maintain.
- TRAVIS TRAVIS
- FR 2692454 LECOUVIOUR
- the furniture intended for retirement homes must also fulfill the same medical functions, without neglecting the aesthetic aspect. In fact, residents of retirement homes are looking for a living space closer to that of everyday life. As a result, the furniture manufacturers have created a range of furniture that is visually close to the usual furniture, while including medical features.
- the patent GB 2,473,423 (VERNACARE) and presents a wheelchair equipped with a footrest integral with the seat of the chair, the footrest being movable between a low position and a high position by being actuable at the initiative of the patient, and more particularly by the patient's sitting or raising movements: when the patient sits on the chair, his weight raises the footrest by a return mechanism; conversely, when the patient gets up, the footrest is released, and can resume its low position.
- This chair is also equipped with a wheel locking system, which can however be operated by the caregiver.
- the footrest does not facilitate the movement of the patient. Indeed, it is only in the low position that the footrest allows the patient to get up. However, to place the footrest in the low position, the patient must release the seat of its weight, this that he can do only by the strength of his arms. But the elderly, who represent the majority of patients, usually have no strength in the arms. So that they can not get up alone from this chair and must therefore be assisted by caregivers who are then exposed to lumbago, tendinitis and other hernias.
- a first goal is to provide a chair that contributes to the autonomy of patients.
- a second goal is to make it simpler and safer to use chairs for caregivers.
- a third objective is, more particularly, to provide a chair facilitating the work of the caregiver for the exit and entry of a patient in the chair.
- a fourth objective is to propose a chair that is simple to manufacture and maintain.
- a fifth objective is to offer a chair that is robust.
- a sixth goal is to provide a chair that is lightweight to allow easy movement of patients.
- the footrest finds, by simple gravity, its low position which allows the patient to get up without necessarily having to use the arms.
- the footrest in rolling position, the footrest remains in its upper position because the weight of the patient's legs exerted on the footrest is too low to produce on the axis of the cam a couple to dislodge from the stop to the brake finger.
- FIG. 1 On the figure 1 is represented a wheelchair 1 designed to facilitate, in a medical environment (including hospital, retirement home or even home), the transfer of patients with reduced mobility, typically elderly people whose legs are no longer strong enough to allow them to walk over distances greater than a few meters.
- a medical environment including hospital, retirement home or even home
- This chair 1 comprises, in the first place, a frame 2 provided with a pair of longitudinal members 3 and a central cross member 4 connecting the longitudinal members 3.
- the chair 1 comprises, in the second place, a seat 5 intended to accommodate a patient and provided for this purpose with a seat 6 and a backrest 7, as well as, where appropriate (as in the illustrated example), armrests 8 and a headrest 9.
- the seat 5 is mounted on the frame 2, for example by means of a jack 10 secured to the cross member 4, in which is housed a rod 11 of the jack secured to the seat 6.
- the seat 6 can be adjustable in height and / or depth (that is to say longitudinally); the armrests 8 can be adjustable in height and / or width; the headrest 9 can be adjustable in height and / or inclination.
- the chair 1 comprises, thirdly, wheels 12, 13 mounted on the frame 2. As can be seen in particular on the Figures 1 to 4 , the chair 1 comprises, in the example shown, four wheels 12, 13, namely two front wheels 12 and two rear wheels 13 . Each wheel 12, 13 is mounted at the end of a spar 3.
- Each wheel 12, 13 comprises a rim 14 rotatably mounted on an axis 15 integral with a yoke 16 itself rotatably mounted about a vertical axis relative to a liner 17 formed at the end of the spar 3.
- Each wheel 12, 13 furthermore has a rolling band 18 , preferably rubberized, which surrounds the rim 14.
- the wheels 12, 13 together define a rolling plane 19 which, when the chair is placed on a floor devoid of asperities, is coincident with it.
- the chair 1 preferably comprises a handlebar 20 mounted behind the backrest 7 to allow the seizure and movement of the chair 1 by a caregiver, in the manner of a carriage.
- the chair 1 comprises, fourthly, at least one brake 21 designed to lock at least one of the wheels 12, 13.
- the chair is equipped with two brakes 21, associated with the rear wheels 13 .
- Each brake 21 comprises a slider 22 at a lower end of which is fixed a shoe 23 having a complementary surface of the tread 18 .
- the brake 21 further comprises a finger 24 secured to the slide 22, at an upper end thereof. As illustrated on figures 5 and 7 this finger 24 preferably has a conical shape, rounded at its end.
- the brake 21 is displaceable in translation relative to the chassis 2 (and more precisely with respect to the sleeve 17) between a rolling position ( figure 5 ) in which the shoe 23 is spaced apart from the tread band 18 , and a braking position in which the shoe 23 is applied against the tread 18 ( figure 7 ), Which, in normal use conditions (soil nonslip a reasonable patient weight), blocked by friction the chair 1 in position.
- An additional mechanism may be optionally provided for, in the braking position, further block the rotation of the wheel about its vertical axis.
- the chair 1 comprises, fifthly, a mechanism 25 for actuating the brake 21.
- This mechanism 25 comprises a return spring 26 , preferably a compression spring, which urges the brake 21 towards its rolling position.
- the spring 26 is interposed between a shoulder 27 formed inside the liner 17, and an enlarged upper portion 28 of the slider 22.
- the mechanism 25 for actuating the brake 21 also comprises a cam 29 cooperating with the finger 24 to move the brake 21.
- This cam 29 is rotatably mounted relative to the frame 2 (and more precisely with respect to the sleeve 17) around of a horizontal axis, between a rolling position in which the cam 29 leaves (via the finger 24) the brake 21 occupy its braking position, and a braking position in which the cam 29 places (via the finger 24) the brake 21 in its rolling position.
- the cam 29 is provided with a detent 30 adapted to receive the finger 24.
- This notch 30 is, in the illustrated example, formed by an indentation hollowed radially in a periphery 31 (moreover substantially circular ) of the cam 29.
- the cam 29 comprises a second notch 32, adjacent the first notch 30 and separated therefrom by a tooth 33 projecting, and a ramp 34 which connects the second notch 32 to the circular periphery 31 of the cam 29.
- the cam 29 comprises, at its center, a hole 35 with a hexagonal contour.
- the chair 1 comprises, sixth, a control lever 36 , rotatably mounted relative to the frame 2, designed to drive the cam 29 in rotation and thus actuate or release the brake (s).
- this lever 36 is rotatably mounted on the sleeves 17 around a horizontal articulation axis 37 .
- the lever 36 is made integral in rotation with the (or each) cam 29 by means of a pin 38 of hexagonal section threaded into the central hole 35, complementary to the cam 29.
- the hinge axis 37 is not necessarily unitary: it is here formed by two coaxial hinges 37 carried by each of the folders 17.
- the lever 29 comprises a pair of pedals 39, 40 which extend away from each other from the articulation axis 37 of the lever 36, namely a pedal 39 of the upper control. the braking position, and a lower pedal 40 for controlling the rolling position.
- the upper pedal 39 is here formed of two non-contiguous L-shaped sections 41 .
- the lower pedal 40 it is advantageously monobloc, and comprises a transverse bar 42 which connects to the joints by two bent end sections 43 .
- the cam 29 In the rolling position, the cam 29 is oriented angularly so that the first catch 30 opens downwards, the finger 24 being housed therein ( figure 5 ) under the action of the return spring 26 which urges the finger 24 towards the axis of the cam 29.
- the tooth 33 opposes the rotation of the cam 29 by exerting on the flank of the finger 24 an essentially tangential force.
- the spring 26 is calibrated, and the cam 29 dimensioned, so that the threshold value of the engine torque is greater than or equal to 5 Nm. According to a preferred embodiment, this threshold value is between 5 Nm and 30 Nm. It is possible , but disadvised, to exceed this last value, because the lever arm (in other words, the length of the upper pedal 39 , measured from the axis 37 of articulation of the lever 36) necessary to manipulate the cam 29 is then relatively important, and further exposes the cam 29 to a risk of rupture. This question is addressed again below.
- the chair 1 comprises, seventh, a footrest 44 mounted on the frame 2, intended to accommodate the feet of the patient and to raise them in relation to the ground during taxiing, while allowing the patient to rest on the ground when he has to get up (with or without help).
- This footrest 44 is independent of the seat 6, to which it is connected by any mechanism.
- the footrest 44 is mobile against the chassis 2, however, between a low position ( figure 4 ) in which the footrest 44 extends in the vicinity of the rolling plane 19 , and a high position spaced from the low position.
- the chair 1 comprises, in the eighth place, a mechanism 45 for actuating the footrest 44 to allow the movement thereof from its lower position to its upper position, and vice versa.
- This actuating mechanism 45 comprises at least one lifting arm 46 connected to the footrest 44 and articulated relative to the chassis 2.
- the mechanism 45 for actuating the footrest comprises a pair of superimposed lifting arms 46, 47 , namely an upper arm 46 and a lower arm 47 , articulated mounted, of on the one hand, with respect to the chassis 2 (for example by means of bolts 48 forming a rear articulation) by a rear end and, on the other hand, with respect to the footrest 44 by a front end.
- each arm 46, 47 is hinged at its rear end to the cross member 4, and extends between the longitudinal members 3 on the side of the front wheels 12 .
- the joint on the foot rest 44 is effected via a yoke 49 in which is received and secured (e.g. by bolts 50 forming a front coupling) the front ends of arms 46, 47 of lifting .
- the arms 46, 47 are of equal length and thus form a deformable parallelogram that moves the footrest 44 while maintaining its attitude constant.
- the mechanism 45 for actuating the footrest 44 further comprises a rod 51 coupled to the lever 36 by a rear end and carrying, at a front end, a follower 52 of cam resting against one of the arms 46, 47 of lifting.
- the mechanism 45 for actuating the footrest 44 comprises, for balancing the forces, a pair of identical rods 51 which extend parallel between the longitudinal members 3.
- each rod 51 is coupled to the lever 36 by being articulated on the lower pedal 40 , for example on a lug 53 projecting therefrom.
- the joint is for example made by means of bolts 54.
- the rods 51 are connected by a shaft 55 carrying a roller (e.g., bearing) 52 which forms the follower cam.
- This roller 52 is in rolling contact with a support plate 56 provided on the upper lifting arm 46 .
- each bead wire 51 is provided with an oblong window 57 which cooperates with a guide pin 58 secured to the frame 2.
- this guide pin 58 is coaxial with the articulation of the lower guide arm 47 on the frame 2.
- This pin 58 is for example formed by the body of a bolt 48 for fixing the lower arm 47 on the frame 2.
- the lever 36 places, via the (the) rod (s) 51, the footrest 44 in its upper position. More precisely, the exercise of a thrust (arrow F4, figure 4 ) On the lower pedal 40 causes rotation of the lever 36 and moving the rod 51 forwardly (arrow F5, figure 4 ), the latter being guided by the sliding of the pin 58 in the window 57.
- the (the) rod (s) 51 then exerts a thrust, via the roller 52, on the support plate 56 and constrained by therefore, the upper arm 46 of lifting to pivot about its hinge 48 back, which jointly drives the rotation of the lower arm 47 and the raising of the leg support 44 towards its raised position (arrow F6, figure 4 ).
- the angular limit stop of the lever 36 (determining the high position of the footrest 44) is formed by the oblong window 57 , at a rear end of which is applied the guide pin 58 .
- the brake 21 releases the rear wheels 13 . In this way, it is possible for the caregiver to freely move the chair 1, the feet of the patient being raised by the footrest 44 and thus forming no obstacle to driving.
- the lever 36 In contrast, in the braking position, the lever 36 allows the footrest 44 to occupy its low position. Indeed, the thrust (arrow F1, figure 6 ) exerted on the upper pedal 39 causes the reverse rotation of the lever 36 and the movement of the rod (s) 51 towards the rear (arrow -F5, figure 6 ). Under the effect of the own weight of the footrest 44 and the arms 46, 47 lifting, to which is added, when the feet of a patient are resting on the footrest 44, the weight thereof, the arms 46, 47 rotate in the opposite direction and the footrest 44 lowers (arrow -F6, figure 6 ) as the roller 52 retracts backward until the footrest 44 reaches its low position.
- the angular limit stop of the lever 36 The angular limit stop of the lever 36
- the architecture of the actuating mechanism of the footrest is such that in rolling position the combined weight of the footrest 44, arms 46, 47 and feet of the patient is insufficient to tilt the lever 36 to its position braking, the torque generated on the articulation axis 37 of the lever 36 being insufficient to dislodge the finger 24 of the notch 30 of the cam 29.
- the formula above allows to deduce the value of the torque C, about 3 Nm. This calculation however does not take account of the friction, in particular between the pin 58 and the edge of the window 47. Indeed, the pin opposes the movement of the rod 51 towards the rear a friction resisting force substantially proportional to the the force F (the coefficient of proportionality depending on the materials chosen for the pin 58 and the bead 51) and directed forward, in the axis of the bead wire 51.
- F the coefficient of proportionality depending on the materials chosen for the pin 58 and the bead 51
- This effort considerably reduces, in practice, the torque C applied to the axis 37 of articulation of the lever.
- the value of the torque C is much lower than the threshold value (greater than 5 Nm) of the engine torque to maneuver the cam 29 which, consequently, remains in rolling position as long as no sufficient thrust is exerted on the upper pedal 39 .
- L4 denotes the length of the upper pedal 39 , measured from the articulation axis 37 of the lever, and C 'the torque generated on the axis 37 of articulation of the lever by a force, noted F', exerted along the arrow F1 on the upper pedal 39 , for placing the brake 21 in the braking position.
- This torque is largely sufficient to maneuver the cam 29, when the threshold value of the engine torque is less than 15 Nm.
- the torque C' generated is 30 Nm, making it possible to maneuver the cam 29 in all cases (we have seen that 30 Nm is the maximum recommended threshold value).
- the parameters A1, A2, L1 and L2 in particular, possible to vary the torque C.
- this torque reaches the threshold value to operate the cam 29 and thus move the brake 21 in the braking position without action on the lever 36, it will be ensured, preferably, that in driving position the angle A1 does not exceed 20 °, while being advantageously greater than or equal to 10 °.
- a value of about 15 ° represents a good compromise.
- the angle A2 is preferably less than 15 °.
- a value of about 10 ° (as in the example proposed above) also represents a good compromise.
- the chair 1 which has just been described offers a number of advantages.
- the footrest 44 being independent of the seat 6, it does not force the patient to use the arms to get up. In other words, since the carer has actuated the brake 21, the footrest 44 passing in the low position allows the patient to rise while leaning on the ground. This results in a contribution to the autonomy of patients.
- independent is meant here that the structure and operation of the footrest are not related to the seat, the actuation of the footrest does not depend on the seat. There is thus no functional and structural link between what is above the frame (and in particular the entire structure of the seat, backrest, armrests, headrest that can be made according to different design ), and the structure of the chassis itself.
- the mechanisms 25, 45 for operating the brakes 21 and the footrest 44 are relatively simple to manufacture and require few maintenance operations.
- these mechanisms 25, 45 are compact and lightweight, which lighten the chair 1 and facilitates its use, particularly its movement and handling during (rare) maintenance operations.
- the up and down movement of the footrest does not result from the patient sitting or standing up, but is caused by the caregiver. As soon as the carer actuated the brake, the footrest moved to the lower position, without the patient having to lift the seat to the strength of the arms.
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Description
L'invention concerne le domaine des fauteuils, et plus particulièrement les fauteuils permettant le déplacement de personnes en milieu médical.The invention relates to the field of armchairs, and more particularly the chairs for moving people in a medical environment.
Ce type de fauteuil est notamment utilisé dans les hôpitaux ou les maisons de retraite pour permettre le transfert des patients par des aides soignants.This type of chair is particularly used in hospitals or retirement homes to allow the transfer of patients by caregivers.
Il existe différents types de fauteuils selon les besoins.There are different types of chairs depending on the needs.
En milieu hospitalier, un fauteuil médicalisé doit ainsi permettre le déplacement aisé des patients tout en étant à la fois robuste et simple d'entretien. A titre d'illustration, on pourra se référer, par exemple, aux brevets
Le mobilier destiné aux maisons de retraites doit également remplir les mêmes fonctions médicales, sans toutefois négliger l'aspect esthétique. En effet, les résidents des maisons de retraite recherchent un espace de vie plus proche de celui de la vie courante. Aussi les fabricants de mobilier ont-ils créé une gamme de mobilier proche visuellement du mobilier usuel, tout en incluant des fonctionnalités médicales.The furniture intended for retirement homes must also fulfill the same medical functions, without neglecting the aesthetic aspect. In fact, residents of retirement homes are looking for a living space closer to that of everyday life. As a result, the furniture manufacturers have created a range of furniture that is visually close to the usual furniture, while including medical features.
Le brevet
Ce fauteuil n'apparaît fonctionnel qu'en théorie. Dans la pratique cependant, le repose-pied ne facilite nullement le mouvement de relevée du patient. En effet, ce n'est qu'en position basse que le repose-pied permet au patient de se relever. Or, pour placer le repose-pied en position basse, le patient doit libérer l'assise de son poids, ce qu'il ne peut faire qu'à la force de ses bras. Or les personnes âgées, qui représentent la majorité des patients visés, n'ont généralement plus de force dans les bras. De sorte qu'ils ne peuvent se relever seuls de ce fauteuil et doivent par conséquent être assistés des aides soignants qui sont dès lors exposés aux lumbagos, tendinites et autres hernies.This chair appears functional only in theory. In practice, however, the footrest does not facilitate the movement of the patient. Indeed, it is only in the low position that the footrest allows the patient to get up. However, to place the footrest in the low position, the patient must release the seat of its weight, this that he can do only by the strength of his arms. But the elderly, who represent the majority of patients, usually have no strength in the arms. So that they can not get up alone from this chair and must therefore be assisted by caregivers who are then exposed to lumbago, tendinitis and other hernias.
Un premier objectif est de proposer un fauteuil qui contribue à l'autonomie des patients.A first goal is to provide a chair that contributes to the autonomy of patients.
Un deuxième objectif est de rendre plus simple et plus sûre d'utilisation des fauteuils pour les aides soignants.A second goal is to make it simpler and safer to use chairs for caregivers.
Un troisième objectif est, plus particulièrement, de proposer un fauteuil facilitant le travail de l'aide soignant pour la sortie et l'entrée d'un patient dans le fauteuil.A third objective is, more particularly, to provide a chair facilitating the work of the caregiver for the exit and entry of a patient in the chair.
Un quatrième objectif est de proposer un fauteuil qui soit simple de fabrication et de maintenance.A fourth objective is to propose a chair that is simple to manufacture and maintain.
Un cinquième objectif est de proposer un fauteuil qui soit robuste.A fifth objective is to offer a chair that is robust.
Un sixième objectif est de proposer un fauteuil qui soit léger pour permettre un déplacement aisé des patients.A sixth goal is to provide a chair that is lightweight to allow easy movement of patients.
A cet effet, il est proposé un fauteuil roulant selon la revendication 1, comprenant :
- un châssis, une assise montée sur le châssis et des roues montées sur le châssis, ces roues ayant chacune une bande de roulement et définissant ensemble un plan de roulage,
- au moins un frein muni d'un patin et d'un doigt formant suiveur de came, ce frein étant déplaçable en translation par rapport au châssis entre une position de freinage dans laquelle le patin est appliqué contre la bande de roulement d'une roue, et une position de roulage dans laquelle le patin est écarté de la bande de roulement,
- un mécanisme d'actionnement du frein, qui comprend :
- ∘ une came coopérant avec le doigt, cette came étant montée en rotation par rapport au châssis entre une position de roulage dans laquelle, via le doigt, la came laisse le frein occuper sa position de roulage, et une position de freinage dans laquelle, via le doigt, la came place le frein dans sa position de freinage, cette came étant munie d'un cran d'arrêt dans lequel, en position de roulage, le doigt du frein est logé ;
- ∘ un ressort de rappel qui sollicite le frein vers sa position de roulage ;
- un repose-pied monté sur le châssis, ce repose-pied étant indépendant de l'assise et mobile par rapport au châssis entre une position basse dans laquelle le repose-pied s'étend au voisinage du plan de roulage, et une position haute écartée de la position basse,
- un mécanisme d'actionnement du repose-pied, qui comprend un bras de levage relié au repose-pied et monté articulé par rapport au châssis, et une tringle portant, à une extrémité avant, un suiveur de came en appui contre le bras de levage ;
- un levier de commande monté en rotation par rapport au châssis, ce levier étant solidaire en rotation de la came et couplé à la tringle par une extrémité arrière de celle-ci, ce levier étant mobile entre :
- ∘ une position de freinage dans laquelle le levier place la came en position de freinage et dans laquelle le levier permet au repose-pied d'occuper sa position basse,
- ∘ une position de roulage dans laquelle le levier place la came en position de roulage et dans laquelle, via la tringle, le levier place le repose-pied dans sa position haute.
- a chassis, a seat mounted on the chassis and wheels mounted on the chassis, these wheels each having a tread and together defining a rolling plane,
- at least one brake provided with a shoe and a follower pin, this brake being displaceable in translation relative to the chassis between a braking position in which the shoe is applied against the tread of a wheel, and a rolling position in which the pad is moved away from the tread,
- a brake actuation mechanism, which comprises:
- A cam cooperating with the finger, this cam being rotatably mounted relative to the chassis between a rolling position in which, via the finger, the cam allows the brake to occupy its rolling position, and a braking position in which, via the finger, the cam places the brake in its braking position, this cam being provided with a detent in which, in the rolling position, the brake finger is housed;
- A return spring which urges the brake towards its rolling position;
- a footrest mounted on the frame, this footrest being independent of the seat and movable relative to the frame between a low position in which the footrest extends in the vicinity of the rolling plane, and a high position spaced apart from the low position,
- a footrest actuating mechanism, which includes a lift arm connected to the footrest and hinged to the frame, and a rod carrying at a front end a cam follower bearing against the lift arm ;
- a control lever rotatably mounted relative to the frame, this lever being integral in rotation with the cam and coupled to the rod by a rear end thereof, this lever being movable between:
- A braking position in which the lever places the cam in the braking position and in which the lever allows the footrest to occupy its low position,
- ∘ a rolling position in which the lever places the cam in rolling position and in which, via the rod, the lever places the footrest in its high position.
De la sorte, en position de freinage, le repose-pied retrouve, par simple gravité, sa position basse qui permet au patient de se relever sans nécessairement devoir s'aider des bras. De plus, en position de roulage, le repose-pied demeure dans sa position haute car le poids des jambes du patient qui s'exerce sur le repose-pied est trop faible pour produire sur l'axe de la came un couple permettant de déloger du cran d'arrêt le doigt du frein.In this way, in the braking position, the footrest finds, by simple gravity, its low position which allows the patient to get up without necessarily having to use the arms. In addition, in rolling position, the footrest remains in its upper position because the weight of the patient's legs exerted on the footrest is too low to produce on the axis of the cam a couple to dislodge from the stop to the brake finger.
Diverses caractéristiques supplémentaires peuvent être prévues, seules ou en combinaison :
- en position de roulage, le bras de levage forme avec le plan de roulage un angle compris entre 10 et 20°, et de préférence de 15° environ ;
- en position de roulage, la tringle forme avec le bras de levage un angle compris entre 5 et 15°, et de préférence de 10° environ ;
- le bras de levage comprend une plaque d'appui, et le suiveur de came porté par la tringle se présente sous forme d'un galet en contact roulant avec la plaque d'appui ;
- le mécanisme d'actionnement du repose-pied comprend une paire de bras de levage superposés, à savoir un bras supérieur et un bras inférieur, montés articulés, d'une part, par rapport au châssis par une extrémité arrière et, d'autre part, par rapport au repose-pied par une extrémité avant pour former un parallélogramme déformable ;
- la tringle est pourvue d'une fenêtre oblongue qui coopère avec un pion de guidage solidaire du châssis ;
- le pion de guidage est coaxial avec l'articulation du bras inférieur de levage ;
- le levier comprend une paire de pédales qui s'étendent à l'opposé l'une de l'autre à partir d'un axe d'articulation du levier, à savoir une pédale supérieure de commande de la position de freinage, et une pédale inférieure de commande de la position de roulage, la tringle du mécanisme d'actionnement du repose-pied étant couplée au levier en étant articulée sur la pédale inférieure.
- in rolling position, the lifting arm forms with the rolling plane an angle of between 10 and 20 °, and preferably about 15 °;
- in the rolling position, the rod forms with the lifting arm an angle of between 5 and 15 °, and preferably about 10 °;
- the lift arm comprises a support plate, and the cam follower carried by the rod is in the form of a roller in rolling contact with the support plate;
- the actuating mechanism of the footrest comprises a pair of superposed lifting arms, namely an upper arm and a lower arm, mounted articulated on the one hand, with respect to the chassis by a rear end and on the other hand , relative to the footrest by a front end to form a deformable parallelogram;
- the rod is provided with an oblong window which cooperates with a guiding pin integral with the frame;
- the guide pin is coaxial with the articulation of the lower lifting arm;
- the lever comprises a pair of pedals which extend away from each other from an articulation axis of the lever, namely a top pedal for controlling the braking position, and a pedal lower control of the rolling position, the rod of the actuating mechanism of the footrest being coupled to the lever being hinged to the lower pedal.
D'autres objets et avantages de l'invention apparaîtront à la lumière de la description d'un mode de réalisation, faite ci-après en référence aux dessins annexés dans lesquels :
- la
figure 1 est une vue en perspective, de dessus et par l'avant, d'un fauteuil muni d'un repose-pied articulé ; - la
figure 2 est une vue partielle en perspective de dessous du fauteuil de lafigure 1 avec, en médaillon, un détail à échelle agrandie du mécanisme d'actionnement du repose-pied ; - la
figure 3 est une vue en partielle en perspective, de dessus et par l'arrière, du fauteuil des figures précédentes ; - la
figure 4 est une vue partielle en coupe du fauteuil des figures précédentes, illustrant la position de roulage ; - la
figure 5 est une vue de détail en coupe illustrant le frein et son mécanisme d'actionnement en position de roulage, avec, en médaillon, un détail à échelle agrandie centré sur la came ; - la
figure 6 est une vue similaire à lafigure 4 , illustrant la position de freinage ; - la
figure 7 est une vue similaire à lafigure 5 , en position de freinage.
- the
figure 1 is a perspective view, from above and from the front, of a chair with an articulated footrest; - the
figure 2 is a partial perspective view from below of the armchair of thefigure 1 with, in medallion, an enlarged detail of the mechanism of actuation of the footrest; - the
figure 3 is a partial perspective view, from above and from the rear, of the chair of the preceding figures; - the
figure 4 is a partial sectional view of the chair of the preceding figures, illustrating the rolling position; - the
figure 5 is a sectional detail view illustrating the brake and its actuating mechanism in the rolling position, with, inset, an enlarged detail centered on the cam; - the
figure 6 is a view similar to thefigure 4 , illustrating the braking position; - the
figure 7 is a view similar to thefigure 5 , in the braking position.
Sur la
Ce fauteuil 1 comprend, en premier lieu, un châssis 2 pourvu d'une paire de longerons 3 et d'une traverse 4 centrale reliant les longerons 3. This
Le fauteuil 1 comprend, en deuxième lieu, un siège 5 destiné à accueillir un patient et pourvu à cet effet d'une assise 6 et d'un dossier 7, ainsi que, le cas échéant (comme dans l'exemple illustré), d'accoudoirs 8 et d'un appuie-tête 9. Le siège 5 est monté sur le châssis 2, par exemple par l'intermédiaire d'un vérin 10 solidaire de la traverse 4, dans lequel est logée une tige 11 de vérin solidaire de l'assise 6. The
Divers réglages peuvent être prévus : l'assise 6 peut être réglable en hauteur et/ou en profondeur (c'est-à -dire longitudinalement) ; les accoudoirs 8 peuvent être réglables en hauteur et/ou en largeur ; l'appuie-tête 9 peut être réglable en hauteur et/ou en inclinaison.Various adjustments can be provided: the seat 6 can be adjustable in height and / or depth (that is to say longitudinally); the
Le fauteuil 1 comprend, en troisième lieu, des roues 12, 13 montées sur le châssis 2. Comme on peut le voir notamment sur les
Chaque roue 12, 13 comprend une jante 14 montée en rotation sur un axe 15 solidaire d'une chape 16 elle-même montée en rotation autour d'un axe vertical par rapport à une chemise 17 formée à l'extrémité du longeron 3. Each
Chaque roue 12, 13 possède en outre une bande 18 de roulement, de préférence caoutchoutée, qui entoure la jante 14. Each
Les roues 12, 13 définissent ensemble un plan 19 de roulage qui, lorsque le fauteuil est posé sur un sol dépourvu d'aspérités, est confondu avec celui-ci.The
Le fauteuil 1 comprend de préférence un guidon 20 monté derrière le dossier 7 pour permettre la saisie et le déplacement du fauteuil 1 par un aide-soignant, à la manière d'un chariot.The
Le fauteuil 1 comprend, en quatrième lieu, au moins un frein 21 conçu pour bloquer au moins l'une des roues 12, 13. Dans l'exemple illustré, le fauteuil est équipé de deux freins 21, associés aux roues 13 arrière.The
Chaque frein 21 comprend un coulisseau 22 à une extrémité inférieure duquel est fixé un patin 23 ayant une surface complémentaire de la bande 18 de roulement. Le frein 21 comprend par ailleurs un doigt 24 solidaire du coulisseau 22, à une extrémité supérieure de celui-ci. Comme illustré sur les
Le fauteuil 1 comprend, en cinquième lieu, un mécanisme 25 d'actionnement du frein 21. Ce mécanisme 25 comprend un ressort 26 de rappel, de préférence un ressort de compression, qui sollicite le frein 21 vers sa position de roulage. Dans l'exemple illustré, le ressort 26 est interposé entre un épaulement 27 formé à l'intérieur de la chemise 17, et une partie 28 supérieure élargie du coulisseau 22. The
Le mécanisme 25 d'actionnement du frein 21 comprend par ailleurs une came 29 coopérant avec le doigt 24 pour déplacer le frein 21. Cette came 29 est montée en rotation par rapport au châssis 2 (et plus précisément par rapport à la chemise 17) autour d'un axe horizontal, entre une position de roulage dans laquelle la came 29 laisse (via le doigt 24) le frein 21 occuper sa position de freinage, et une position de freinage dans laquelle la came 29 place (via le doigt 24) le frein 21 dans sa position de roulage.The mechanism 25 for actuating the
Comme on le voit bien dans les médaillons de détail des
Comme on le voit aussi dans les médaillons de détail des
Le fauteuil 1 comprend, en sixième lieu, un levier 36 de commande, monté en rotation par rapport au châssis 2, conçu pour entraîner la came 29 en rotation et ainsi actionner ou libérer le(s) frein(s).The
Plus précisément, ce levier 36 est monté en rotation sur les chemises 17 autour d'un axe 37 horizontal d'articulation. Le levier 36 est rendu solidaire en rotation de la (ou chaque) came 29 au moyen d'une broche 38 à section hexagonale enfilée dans le trou 35 central, complémentaire, de la came 29. Comme on le voit sur l'exemple illustré sur la
Le levier 36 est mobile entre :
- ∘ une position de freinage dans laquelle le levier 36 place la came 29 en position de freinage,
- ∘ une position de roulage dans laquelle le levier 36 place la came 29 en position de roulage.
- A braking position in which the
lever 36 places thecam 29 in the braking position, - ∘ a rolling position in which the
lever 36 places thecam 29 in rolling position.
Selon un mode de réalisation illustré sur la
En position de roulage, la came 29 est orientée angulairement de telle sorte que le premier cran 30 s'ouvre vers le bas, le doigt 24 y étant logé (
La dent 33 s'oppose à la rotation de la came 29 en exerçant sur le flanc du doigt 24 un effort essentiellement tangentiel. Pour déloger le doigt 24 du cran 30, il est nécessaire d'imprimer à la came 29 (par poussée sur la pédale 39 supérieure, comme suggéré par la flèche F1 sur la
Le ressort 26 est taré, et la came 29 dimensionnée, pour que la valeur seuil du couple moteur soit supérieure ou égale à 5 Nm. Selon un mode préféré de réalisation, cette valeur seuil est comprise entre 5 Nm et 30 Nm. Il est possible, mais déconseillé, de dépasser cette dernière valeur, car le bras de levier (en d'autres termes, la longueur de la pédale 39 supérieure, mesurée à partir de l'axe 37 d'articulation du levier 36) nécessaire pour manoeuvrer la came 29 est alors relativement important, et on expose en outre la came 29 à un risque de rupture. On aborde à nouveau cette question ci-après.The
Le fauteuil 1 comprend, en septième lieu, un repose-pied 44 monté sur le châssis 2, destiné à accueillir les pieds du patient et à les surélever par rapport au sol lors du roulage, tout en permettant au patient de prendre appui sur le sol lorsqu'il doit se relever (avec ou sans aide).The
Ce repose-pied 44 est indépendant de l'assise 6, auquel il n'est relié par aucun mécanisme. Le repose-pied 44 est en revanche mobile par rapport au châssis 2, entre une position basse (
Le fauteuil 1 comprend, en huitième lieu, un mécanisme 45 d'actionnement du repose-pied 44 pour permettre le déplacement de celui-ci de sa position basse à sa position haute, et réciproquement.The
Ce mécanisme 45 d'actionnement comprend au moins un bras 46 de levage relié au repose-pied 44 et monté articulé par rapport au châssis 2. This
Selon un mode de réalisation préféré illustré sur les figures, le mécanisme 45 d'actionnement du repose-pied comprend une paire de bras 46, 47 de levage superposés, à savoir un bras 46 supérieur et un bras 47 inférieur, montés articulés, d'une part, par rapport au châssis 2 (par exemple au moyen de boulons 48 formant une articulation arrière) par une extrémité arrière et, d'autre part, par rapport au repose-pied 44 par une extrémité avant.According to a preferred embodiment illustrated in the figures, the
Comme illustré sur la
Le mécanisme 45 d'actionnement du repose-pied 44 comprend en outre une tringle 51 couplée au levier 36 par une extrémité arrière et portant, à une extrémité avant, un suiveur 52 de came en appui contre l'un des bras 46, 47 de levage.The
Selon un mode préféré de réalisation illustré sur les figures, le mécanisme 45 d'actionnement du repose-pied 44 comprend, pour l'équilibrage des efforts, une paire de tringles 51 identiques qui s'étendent parallèlement, entre les longerons 3. According to a preferred embodiment illustrated in the figures, the
Plus précisément, et comme cela est visible sur la
A leur extrémité avant, les tringles 51 sont reliées par un arbre 55 portant un galet (par exemple un roulement) qui forme le suiveur 52 de came. Ce galet 52 est en contact roulant avec une plaque 56 d'appui prévue sur le bras 46 supérieur de levage.At their front end, the
Comme on le voit dans le médaillon de détail de la
La manoeuvre du repose-pied 44 est commandée par le levier 36. En position de roulage, le levier 36 place, via la (les) tringle(s) 51, le repose-pied 44 dans sa position haute. Plus précisément, l'exercice d'une poussée (flèche F4,
A contrario, en position de freinage, le levier 36 permet au repose-pied 44 d'occuper sa position basse. En effet, la poussée (flèche F1,
(déterminant la position basse du repose-pied 44) est réalisée par la fenêtre 57 oblongue, à une extrémité avant de laquelle vient s'appliquer le pion 58 de guidage. Nous avons vu que, dans cette position de freinage, le frein 21 bloque les roues 13 arrière. De la sorte, le fauteuil 1 est à l'arrêt et les pieds du patient sont en appui sur le sol par l'intermédiaire du repose-pied 44, ce qui permet au patient de se relever (avec ou sans aide).(Determining the low position of the footrest 44) is performed by the
L'architecture du mécanisme d'actionnement du repose-pied est telle qu'en position de roulage le poids combiné du repose-pied 44, des bras 46, 47 et des pieds du patient est insuffisant pour faire basculer le levier 36 vers sa position de freinage, le couple généré sur l'axe 37 d'articulation du levier 36 étant insuffisant pour déloger le doigt 24 du cran 30 de la came 29. The architecture of the actuating mechanism of the footrest is such that in rolling position the combined weight of the
On note, en référence à la
- L1 la longueur des
46, 47 de levage, mesurée entre les axes 48, 50 d'articulation ;bras - L2 l'entraxe entre le galet 52
et l'articulation 48 arrière dubras 46 supérieur, en position de roulage ; - L3 la distance de l'articulation 54 arrière de la tringle 51 à l'axe 37 d'articulation du levier 36 ;
- A1 l'angle des
46, 47 de levage avec lebras plan 19 de roulage, en position de roulage ; - A2 l'angle du
bras 46 supérieur de levage avec la tringle 51, en position de roulage ; - A3 l'angle entre la tringle 51 et le segment (en trait mixte sur la
figure 4 )joignant l'articulation 54 de la tringle 51 Ã l'axe 37 d'articulation du levier 36 ; - F l'effort qui s'exerce sur l'articulation 50 avant du
bras 46 supérieur, par les poids combinés des 46, 47, du repose-pied 44 et des pieds du patient ;bras - C le couple qui s'exerce sur l'axe 37 d'articulation du levier 36, résultant de l'effort F.
- L1 the length of the
46, 47 lifting, measured between thearms 48, 50 of articulation;axes - L2 the distance between the
roller 52 and therear articulation 48 of theupper arm 46 , in rolling position; - L3 the distance from the
hinge 54 rear of therod 51 to theaxis 37 of articulation of thelever 36; - A1 the angle of the
46, 47 lifting with thearms plane 19 of rolling, rolling position; - A2 the angle of the
upper lifting arm 46 with therod 51, in rolling position; - A3 the angle between the
rod 51 and the segment (in dashed line on thefigure 4 ) joining thearticulation 54 of therod 51 to theaxis 37 of articulation of thelever 36 ; - The force exerted on the
front articulation 50 of theupper arm 46 by the combined weights of the 46, 47, thearms footrest 44 and the feet of the patient; - C the torque exerted on the
articulation axis 37 of thelever 36, resulting from the effort F.
Il est aisé de démontrer que le couple C se calcule à l'aide de la formule suivante :
On fournit ci-après un exemple de valeurs pour les paramètres précités :
La formule ci-dessus permet de déduire la valeur du couple C, soit 3 Nm environ. Ce calcul ne tient cependant pas compte des frottements, en particulier entre le pion 58 et le bord de la fenêtre 47. En effet, le pion oppose au mouvement de la tringle 51 vers l'arrière un effort résistant de frottement sensiblement proportionnel à l'effort F (le coefficient de proportionnalité dépendant des matériaux choisis pour le pion 58 et la tringle 51) et dirigé vers l'avant, dans l'axe de la tringle 51. Cet effort réduit considérablement, dans la pratique, le couple C appliqué sur l'axe 37 d'articulation du levier. Quoi qu'il en soit, la valeur du couple C est très inférieure à la valeur seuil (supérieure à 5 Nm) du couple moteur permettant de manoeuvrer la came 29 qui, en conséquence, demeure en position de roulage tant qu'aucune poussée suffisante n'est exercée sur la pédale 39 supérieure.The formula above allows to deduce the value of the torque C, about 3 Nm. This calculation however does not take account of the friction, in particular between the
Dès lors qu'une telle poussée est exercée (au pied par l'aide-soignant), comme suggéré par la flèche F1 sur la
On note L4 la longueur de la pédale 39 supérieure, mesurée à partir de l'axe 37 d'articulation du levier, et C' le couple généré sur l'axe 37 d'articulation du levier par un effort, noté F', exercé suivant la flèche F1 sur la pédale 39 supérieure, destiné à placer le frein 21 en position de freinage. Le couple C' se calcule à l'aide de la formule suivante :
Ainsi, pour un effort F' de 150 N (soit environ 15 kg) et une longueur L4 de 125 mm, le couple C' généré est de 18,75 Nm.Thus, for a force F generated '150 N (about 15 kg) and a length L4 of 125 mm, the torque C' of 18.75 Nm.
Ce couple suffit largement à manoeuvrer la came 29, lorsque la valeur seuil du couple moteur est inférieure à 15 Nm.This torque is largely sufficient to maneuver the
En maintenant la longueur L4, et en exerçant un effort F' de 240 Nm (soit environ 25 kg), le couple C' généré est de 30 Nm, permettant de manoeuvrer la came 29 dans tous les cas (nous avons vu que 30 Nm est la valeur seuil maximale conseillée).By maintaining the length L4, and exerting a force F 'of 240 Nm (or about 25 kg), the torque C' generated is 30 Nm, making it possible to maneuver the
On notera que les valeurs numériques fournies ci-dessus le sont uniquement à titre d'exemple mais ne sont cependant ni impératives, ni limitatives.It should be noted that the numerical values provided above are only exemplary but are however neither imperative nor limiting.
D'une manière générale, on comprend que les paramètres A1, A2 L1 et L2 notamment, permettent de faire varier le couple C. Pour éviter que ce couple n'atteigne la valeur seuil permettant de manoeuvrer la came 29 et ainsi de déplacer le frein 21 en position de freinage sans action sur le levier 36, on veillera, de préférence, à ce qu'en position de roulage l'angle A1 ne dépasse pas 20°, tout en étant avantageusement supérieur ou égal à 10°. Une valeur de 15° environ (comme dans l'exemple proposé ci-dessus) représente un bon compromis.In general, it is understood that the parameters A1, A2, L1 and L2 in particular, possible to vary the torque C. To prevent this torque reaches the threshold value to operate the
De même, l'angle A2 est de préférence inférieur à 15°. Une valeur de 10° environ (comme dans l'exemple proposé ci-dessus) représente également un bon compromis.Likewise, the angle A2 is preferably less than 15 °. A value of about 10 ° (as in the example proposed above) also represents a good compromise.
Le fauteuil 1 qui vient d'être décrit offre un certain nombre d'avantages.The
Premièrement, le repose-pied 44 étant indépendant de l'assise 6, il n'oblige pas le patient à s'aider des bras pour se relever. En d'autres termes, dès lors que l'aide-soignant a actionné le frein 21, le repose-pied 44 passant en position basse permet au patient de se relever en prenant appui sur le sol. Il en résulte une contribution à l'autonomie des patients. Par « indépendant » est signifié ici que la structure et le fonctionnement du repose-pied ne sont pas liés à l'assise, l'actionnement du repose-pied ne dépendant pas de l'assise. Il n'existe ainsi aucun lien fonctionnel et structurel entre ce qui est au dessus du châssis (et notamment l'ensemble de la structure de l'assise, du dossier, des accoudoirs, de l'appui tête qui peuvent être réalisés selon différents design), et la structure du châssis lui-même.First, the
Deuxièmement, de manière subsidiaire, cette autonomie accrue des patients rend l'utilisation du fauteuil 1 plus sûre et ergonomique pour les aides-soignants, qui ne sont pas systématiquement contraints d'aider les patients à se relever.Secondly, in the alternative, this increased patient autonomy makes the use of the
Troisièmement, lorsque l'aide-soignant aide le patient à se relever ou à s'installer, il peut compter sur un appui ferme des pieds de celui-ci au sol, le repose-pied 44 étant en position basse. Le travail de l'aide-soignant s'en trouve ainsi facilité.Third, when the caregiver helps the patient to get up or settle down, he can count on a firm support of the feet of the latter on the ground, the
Quatrièmement, les mécanismes 25, 45 d'actionnement des freins 21 et du repose-pied 44 sont de fabrication relativement simple, et ne nécessitent que peu d'opérations de maintenance.Fourthly, the
Cinquièmement, de manière subsidiaire, ces mécanismes 25, 45 sont robustes et garantissent une bonne longévité du fauteuil 1. Fifth, in a subsidiary manner, these
Sixièmement, ces mécanismes 25, 45 sont compacts et légers, ce qui allège le fauteuil 1 et facilite son utilisation, en particulier son déplacement et sa manipulation lors des (rares) opérations de maintenance.Sixth, these
Le mouvement de montée et descente du repose-pied ne résulte pas de ce que le patient s'assoit ou se lève, mais est provoqué par l'aide-soignant. Dès que l'aide-soignant a actionné le frein, le repose-pied est passé en position basse, sans que le patient ait du, pour ce faire, se lever du siège à la force des bras.The up and down movement of the footrest does not result from the patient sitting or standing up, but is caused by the caregiver. As soon as the carer actuated the brake, the footrest moved to the lower position, without the patient having to lift the seat to the strength of the arms.
Claims (10)
- Wheelchair (1) comprising:- a chassis (2), a seating part (6) mounted on the chassis (2) and front wheels (12) and rear wheels (13) which are mounted on the chassis (2), these wheels (12, 13) each having a tyre (18) and together defining a rolling plane (19),- at least one brake (21) equipped with a brake shoe (23) and with a finger (24) forming a cam follower, this brake (14) being associated with a rear wheel (13) and translationally moveable with respect to the chassis (2) between a rolling position in which the shoe (23) is away from the tyre (18) of the wheel and a braking position in which the brake shoe (23) is pressed against the tyre (18),- a mechanism (25) for operating the brake (21), which comprises:o a cam (29) collaborating with the finger (24), this cam (29) being mounted with the ability to rotate with respect to the chassis (2) between a rolling position in which, via the finger (24), the cam (29) allows the brake (21) to occupy its rolling position, and a braking position in which, via the finger (24), the cam (29) places the brake (21) in its braking position,o a return spring (26) which urges the brake (21) towards its rolling position;- a footrest (44) mounted on the chassis (2), able to move with respect to the latter between a down position in which the footrest (44) extends in the vicinity of the rolling plane (19) and an up position separated from the down position,- a mechanism (45) for actuating the footrest (44), which comprises a lifting arm (46) connected to the footrest (44) and mounted articulated with respect to the chassis (2), and a link rod (51) which, at a front end, bears a cam follower (52) bearing against the lifting arm (46);- an operating lever (36) mounted to rotate with respect to the chassis (2), this lever (36) rotating as one with the cam (29) and being coupled to the link rod (51) via a rear end of the latter, this lever (36) being able to move between:the footrest (44) being independent of the seating part (6) and its operation not being connected with the seating part, actuation of the footrest not being dependent on the seating part,∘ a braking position in which the lever (36) places the cam (26) in the braking position and in which the lever (36) allows the footrest (44) to occupy its down position,∘ a rolling position in which the lever (36) places the cam (29) in the rolling position and in which, via the link rod (51), the lever (36) places the footrest (44) in its up position,
the cam (29) being provided with a stop notch (30) in which, in the rolling position, the finger (24) of the brake (21) is housed. - Wheelchair (1) according to Claim 1, characterized in that, in the rolling position, the lifting arm (46) forms, with the rolling plane (19), an angle (A1) of between 10 and 20°.
- Wheelchair (1) according to Claim 2, characterized in that, in the rolling position, the lifting arm (46) forms, with the rolling plane (19), an angle (A1) of around 15°.
- Wheelchair (1) according to one of the preceding claims, characterized in that, in the rolling position, the link rod (51) forms with the lifting arm (46) an angle (A2) smaller than 15°.
- Wheelchair (1) according to Claim 4, characterized in that the link rod (51) forms, with the lifting arm (46), an angle (A2) of around 10°.
- Wheelchair (1) according to one of the preceding claims, characterized in that the lifting arm (46) comprises a pressure plate (56), and in that the cam follower (52) borne by the link rod (51) takes the form of a roller in rolling contact with the pressure plate (56).
- Wheelchair (1) according to one of the preceding claims, characterized in that the mechanism (45) for actuating the footrest (44) comprises a pair of superposed lifting arms (46, 47), namely an upper arm (46) and a lower arm (47) which are mounted articulated, on the one hand, with respect to the chassis (2) via a rear end and, on the other hand, with respect to the footrest (44) via a front end so as to form a deformable parallelogram.
- Wheelchair (1) according to one of the preceding claims, characterized in that the link rod (51) is provided with an oblong aperture (57) which collaborates with a guide pin (58) secured to the chassis (2).
- Wheelchair (1) according to Claims 7 and 8 considered in combination, characterized in that the guide pin (58) is coaxial with the articulation (48) of the lower lifting arm (46) to the chassis (2).
- Wheelchair (1) according to one of the preceding claims, characterized in that the lever (36) includes a pair of pedals which extend one away from the other from an axis (37) of articulation of the lever (36), namely an upper pedal (39) for controlling the braking position, and a lower pedal (40) for controlling the rolling position, the link rod (51) of the mechanism (44) for actuating the footrest being coupled to the lever (36) by being articulated to the lower pedal (40).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL15150409T PL2893912T3 (en) | 2014-01-10 | 2015-01-08 | Hospital chair with hinged foot support |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1450181A FR3016286B1 (en) | 2014-01-10 | 2014-01-10 | MEDICALIZED ARMCHAIR WITH ARTICULATED FOOTREST |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2893912A1 EP2893912A1 (en) | 2015-07-15 |
EP2893912B1 true EP2893912B1 (en) | 2016-11-02 |
Family
ID=50290128
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15150409.9A Active EP2893912B1 (en) | 2014-01-10 | 2015-01-08 | Hospital chair with hinged foot support |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2893912B1 (en) |
DK (1) | DK2893912T3 (en) |
ES (1) | ES2608663T3 (en) |
FR (1) | FR3016286B1 (en) |
PL (1) | PL2893912T3 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6931000B2 (en) * | 2016-03-31 | 2021-09-01 | ベ ユ,ヨン | Wheelchair foot support and safety devices |
CN112869964B (en) * | 2021-01-04 | 2023-04-14 | éƒå³° | A bit auxiliary chair for medical treatment paediatrics |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202012100345U1 (en) * | 2012-02-02 | 2012-03-06 | Sunny Castors Co., Ltd. | Drag reel |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2522729A (en) | 1946-07-15 | 1950-09-19 | Abbey Rents | Collapsible wheel chair |
FR2692454B1 (en) * | 1992-06-23 | 1995-12-22 | Lecouviour Ets | ARMCHAIR FOR PERSONS WITH REDUCED MOBILITY. |
GB2473423A (en) * | 2009-08-06 | 2011-03-16 | Vernacare Ltd | A portering chair with a foot rest displaced by pressure on a seat |
US20120292877A1 (en) * | 2011-05-17 | 2012-11-22 | Johansson Paul J | Mobile rocking patient chair and method of use |
-
2014
- 2014-01-10 FR FR1450181A patent/FR3016286B1/en active Active
-
2015
- 2015-01-08 PL PL15150409T patent/PL2893912T3/en unknown
- 2015-01-08 ES ES15150409.9T patent/ES2608663T3/en active Active
- 2015-01-08 DK DK15150409.9T patent/DK2893912T3/en active
- 2015-01-08 EP EP15150409.9A patent/EP2893912B1/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202012100345U1 (en) * | 2012-02-02 | 2012-03-06 | Sunny Castors Co., Ltd. | Drag reel |
Also Published As
Publication number | Publication date |
---|---|
DK2893912T3 (en) | 2017-01-23 |
PL2893912T3 (en) | 2017-06-30 |
FR3016286B1 (en) | 2016-02-05 |
EP2893912A1 (en) | 2015-07-15 |
ES2608663T3 (en) | 2017-04-12 |
FR3016286A1 (en) | 2015-07-17 |
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