EP3097898B1 - Fauteuil médicalisé équipé d'un système d'aide aux patients à s'asseoir et se relever - Google Patents

Fauteuil médicalisé équipé d'un système d'aide aux patients à s'asseoir et se relever Download PDF

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Publication number
EP3097898B1
EP3097898B1 EP16165866.1A EP16165866A EP3097898B1 EP 3097898 B1 EP3097898 B1 EP 3097898B1 EP 16165866 A EP16165866 A EP 16165866A EP 3097898 B1 EP3097898 B1 EP 3097898B1
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EP
European Patent Office
Prior art keywords
axis
seat
chair
axes
inter
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.)
Active
Application number
EP16165866.1A
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German (de)
English (en)
French (fr)
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EP3097898A1 (fr
Inventor
David Le Roux
Julien Billaud
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.)
Winncare France SAS
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Winncare France SAS
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Priority to PL16165866T priority Critical patent/PL3097898T3/pl
Publication of EP3097898A1 publication Critical patent/EP3097898A1/fr
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Publication of EP3097898B1 publication Critical patent/EP3097898B1/fr
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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
    • A61G5/14—Standing-up or sitting-down aids

Definitions

  • the invention relates to the field of medical chairs, and more particularly chairs equipped with mobile seats to help people with mobility and / or reduced muscle strength (hereinafter referred to as "patients") to sit down and to get up.
  • patients people with mobility and / or reduced muscle strength
  • Sitting and standing are complex movements involving the joints of the ankle, knee and hip, calf muscles (anterior tibia), thighs (quadriceps), glutes and back (lumbar) , and further assume a proper functioning of the inner ear, organ of the balance of the human body.
  • patients can use the arm resting on the armrests that usually equip the medical chairs, but it requires some strength. Patients may also be assisted by carers, but these are then exposed to various musculoskeletal disorders (including low back pain) due to the combination of: discomfort posture, repetition of handling operations; patient weight.
  • a first objective is therefore to provide a medical chair more secure for patients.
  • a second goal is to provide a medical chair for patients who have lost the habit of sitting and getting up without help (and especially patients with MPRH) to find this habit.
  • a third objective is to provide a reliable and relatively lightweight medical chair, allowing easy movement.
  • FIG. 1 On the figure 1 is represented a medical chair 1 for elderly people or suffering from bone lesions or musculoskeletal disorders or balance disorders (hereinafter simply referred to as "patients").
  • This chair 1 is intended not only to enable them to adopt a sitting position, but also to facilitate their movement for caregivers.
  • the chair 1 comprises a frame 2 formed of tubular metal elements (in particular steel or aluminum alloy).
  • This frame 2 includes a carriage 3 provided with wheels 4 enabling the chair 1 to be moved, a base 5 mounted on the carriage 3 , a mast 6 that is adjustably fixed (in particular at an inclination) on the base 5 , and, as illustrated, tubes 7 which extend laterally from the base 5 to allow the adjustable mounting of armrests 8.
  • the carriage 3 comprises for example a main beam 9 and a pair of longitudinal members 10 at the ends of which are fixed the wheels 4.
  • the chair 1 comprises a backrest 11 mounted on the mast 6 , and, optionally, a headrest 12 mounted at an upper end of the mast 6 , surmounting the backrest 11.
  • the chair 1 is preferably equipped with a handlebar 13 formed by a transverse bar fixed to the upper end of the mast 6 , to facilitate the movement and operation of the chair 1 by a caregiver.
  • the term "back” defines a location on the side of the file 11 ; the term “before” defines, conversely, an opposite location.
  • the term “bottom” defines a location on the side of the wheels 4 ; the term “high” defines, conversely, an opposite location.
  • back In general, the terms “back”, “front”, “down” and “up” are used in the context of normal positioning and use of the chair 1 , as is customary with the usual in daily life. The same is true of the terms “vertical” and “horizontal”, assuming that the chair 1 rests on a horizontal floor.
  • the chair 1 comprises a seat 14 movable relative to the base 5 between a low position ( figures 1 , 2 , 5 , 6 ) in which the seat 14 extends in the vicinity of the base 5 to allow a patient 15 to be comfortably seated in the chair 1 , as illustrated on the figure 2 , and a high position ( figures 3 , 4 , 7, 8 , 9 , 10 ) in which the seat 14 is spaced from the base 5 to help the patient 15 to rise up by pushing behind his thighs or, conversely, to sit by cushioning and accompanying its movement.
  • a low position figures 1 , 2 , 5 , 6
  • a high position figures 3 , 4 , 7, 8 , 9 , 10
  • the base 5 can be fixed immovably on the carriage 3 , or, as in the example shown, in an adjustable manner at least in height and, optionally, in rotation, by means of a jack 16 provided with a locking mechanism actuable by means of a lever 17 projecting from the patient's reach 15.
  • the base 5 is, in the illustrated example, in the form of a metal part comprising a horizontal plate 18 and lateral flanges 19 folded at right angles to the plate 18 horizontal.
  • the base 5 (and thus the seat 14 and armrests) is (are) blocked (s) in rotation while the patient 15 sits or stands up, so as to secure it.
  • at least one of the tubes 7 is provided with a stand 20 which abuts against the cross-member 9.
  • the chair 1 is equipped with a footrest 21 movable in height between a low position (illustrated in the figures) in which the footrest 21 extends in the vicinity of the ground to allow the patient 15 to take support when seated and up, and a high position in which the footrest 21 is spaced from the ground to keep the feet of the patient away from the ground, which prevents them from rubbing against it during the chair movements 1.
  • the chair 1 is provided with a mechanism 22 for actuating the footrest 21 , including a lever 23 for foot control and a linkage 24 for coupling the lever 23 to the footrest 21 , the tilting of the control lever 23 placing the footrest 21 in its upper position or, conversely, in its low position.
  • the actuating mechanism 22 simultaneously controls the locking of at least two of the wheels 4 (eg the rear wheels) in the lower position of the footrest 21 , so as to prevent the chair 1 from escaping when the patient 15 gets up or sits.
  • the seat 14 is in two parts: it comprises a half-seat 14A front for supporting the thighs of the patient 15 , and a half-seat 14B back to support its pelvis.
  • the half-seats 14A , 14B are mutually articulated about a common axis A, located in the vicinity of a rear edge of the half-seat 14A front and a front edge of the rear half-seat 14B .
  • the front half-seat 14A comprises a metal front plate 25 provided with flanges 26 ; likewise, the rear half-seat 14B comprises a metal rear plate 27 provided with flanges 28.
  • the axis A is, in the illustrated example, formed by a pair of bolts 29 through which the plates 25 , 27 are rotatably mounted relative to each other.
  • the seat 14 comprises a flexible cushion 30 having a front portion 30A mounted on the front plate 25 via a front plate 31A slidably mounted thereon, and a rear portion 30B mounted on the rear plate 27 by the intermediate a rear plate 31B slidably mounted thereon and hinged relative to the plate 31A before around a hinge 32.
  • the cushion 30 is preferably made of a foam, e.g. a viscoelastic foam (commonly referred to as memory foam).
  • the trays 31A , 31B may be made of plastic, wood or, advantageously, a material derived from wood (typically agglomerated, medium, laminate).
  • the chair 1 further comprises a mechanism 33 for articulating the seat 14 , designed to be able to adopt a folded configuration placing the seat 14 in its low position ( figures 5 , 6 ), and an expanded configuration placing the seat 14 in its high position ( Figures 7, 8 , 9 ).
  • This mechanism 33 comprises, in the first place, a lower frame 34 rotatably mounted relative to the base 5 about an axis B and with respect to the half-seat 14A before around an axis C situated in the vicinity of a front edge of it.
  • the axis B is formed by a pair of bolts 35 by which the lower frame 34 is rotatably mounted on the flanges 19 of the base 5.
  • the lower frame 34 could be formed of a pair of parallel rods interconnected by a spacer.
  • the lower frame 34 is, however, in the form of a one-piece metal part comprising a rectangular plate 36 provided with a notch 37 whose function will appear hereinafter), and lateral edges 38 folded at right angles to the plate 36.
  • the axis C is formed by a tube 39 integrated in the lower card (for example being welded to the plate at a front edge thereof) and rotatably mounted between two fixed bearings 40 (e.g. by screwing) to the half-seat 14A before, on both sides laterally thereof.
  • the mechanism 33 of articulation comprises, secondly, an upper frame 41 rotatably mounted on the one hand with respect to the lower frame 34 about an axis D located between the axes B and C, and on the other hand by relative to the half-seat 14B rear about an axis E located in the vicinity of a rear edge thereof.
  • the upper frame 41 could be formed of a pair of parallel rods interconnected by a spacer.
  • the upper frame 41 is however in the form of a one-piece metal part comprising a rectangular plate 42 provided with a central slot 43 (whose function will appear hereinafter), and lateral edges 44 folded to the square relative to at plate 42.
  • the axis D is formed by a pair of coaxial bolts 45 by which the upper frame 41 is rotatably mounted on the lateral edges of the lower frame 34 .
  • the axis D extends in the plane formed by the axes B and C (in other words, the axes B, C and D are coplanar).
  • the axis E is formed by a pair of coaxial bolts 46 by which the upper frame 41 is rotatably mounted relative to the rear half-seat 14B , and more specifically on lugs 47 formed projecting from the plate 27 back.
  • the articulation mechanism 33 comprises, thirdly, a coupling arm 48 rotatably mounted on the one hand with respect to the base 5 about an axis F, and on the other hand with respect to the half front seat 14A about an axis G spaced from the axis C and located on the side thereof opposite the front plate 25 .
  • the coupling arm 48 could be in the form of a single central rod (that is to say extending in a longitudinal plane of symmetry of the chair 1 ). However, in the illustrated example, the coupling arm 48 comprises a pair of rods 49 arranged laterally. on either side of the base 5 , made integral with each other by means of a spacer 50 (here in the form of a transverse bar).
  • the axis F of rotation of the coupling arm 48 is offset relative to the axis B of rotation of the lower frame 34 , both forwards and downwards, the arm 48 being itself shifted forward relative to the entire lower frame 34 .
  • the axis F is for example formed by a pair of bolts 51 through which each rod 49 is rotatably mounted relative to a flange 19 of the base 5.
  • the arm 48 is rotatably coupled to the half-seat 14A before via a lug 52 projecting from the front plate 25 , which it is secured (eg by welding).
  • the tab 52 is horn-shaped and the axis G of rotation of the arm 48 relative to the half-seat 14A is attached to one end of the tab opposite to it .
  • the axis G is formed by a pair of coaxial bolts 53 .
  • the axes A, B, C, D, E, F and G are mutually parallel and extend transversely, that is to say perpendicular to a general plane of symmetry of the chair 1.
  • the tab 52 which carries the axis G, is integral with the front plate 25 , the AC side of the upper quadrilateral ACDE and the CG side of the lower BCGF quadrilateral are rigidly secured. Since, furthermore, the axes B and F are fixed and the axis D is integral with the lower frame 34 (that is to say on the BC side of the lower BCGF quadrilateral), the deformations of the BCGF and ACDE quadrilaterals are linked, each configuration of the lower quadrilateral BCGF corresponding a single configuration of the upper quadrilateral ACDE, and vice versa.
  • the articulation mechanism 33 is however not free, otherwise gravity would keep it in its folded configuration.
  • the chair 1 comprises a resilient return member 54 which urges the articulation mechanism 33 towards its deployed configuration, so that that in the absence of any resisting force opposing the deformation of the body 54 of return, the deployed configuration is the one occupied by default mechanism 33 articulation.
  • the return member 54 is interposed between the lower frame 34 and the upper frame 41 which it tends to move away from one another.
  • the return member 54 is for example a gas spring, and in this case comprises a cylinder body 55 which, in the illustrated example, is fixed to the lower frame 34 (and more specifically to a yoke 56 secured to it). ci) being hinged to it, and a rod 57 slidably mounted relative to the body 55 and fixed on the upper frame 41 through the notch 37 and the slot 43 , being hinged to the frame higher 41.
  • the notch 37 and the slot 43 provide an angular clearance for the rod 57 to allow pivoting that accompanies the tilting of the upper frame 41 relative to the lower frame 34 during the deployment (or, conversely, the folding) of the mechanism 33 hinge.
  • the articulation mechanism 33 may be provided with an adjustable stop 58 for adjusting the deployed configuration of the mechanism 33 (and thus the high position of the seat 14 ).
  • this stop 58 may be in the form of a knob screwed into the bar 50 bracing the connecting rods 49 of the coupling arm 48 .
  • the stop 58 has a mushroom grip 59 and a rod 60 at the end of which is mounted a hemispherical shoe 61 . In deployed configuration, the plate 36 of the lower frame 34 abuts against the shoe 61 , which blocks in position the articulation mechanism 33 .
  • the movable seat 14 (with its articulation mechanism 33) can accompany and assist the actions of the patient 15 of sitting for the standing posture, and conversely to get up from the sitting posture.
  • the patient 15 presents himself back to the chair 1 , and, his feet on the footrest 21 lowered, slightly bends the legs. It can use the arms coming to grip the armrests 8 (whose height is preferably adjustable), as illustrated on the figure 4 , which solicits, albeit moderately, the extensor muscles of the elbow (especially the triceps brachii).
  • the back of the thighs (hamstrings) coming to rest on the half-seat 14A before, and the pelvis (and buttocks) on the back half-seat 14B the patient 15 can then let go to s' sit down by relaxing his muscles without fear of shock coccyx, the spring 54 damping its movement.
  • the spring 54 is, for this purpose, chosen to slow down (and thus dampen, but not annoy) the folding movement of the articulation mechanism 33 , and this for a panel of patients having varied weights between a minimum value (eg from 35 to 40 kg) and a maximum value (eg of the order of 80 to 90 kg). It is conceivable to choose a gas spring 54 adjustable force to adapt to the weight of the patient 15. Alternatively, it is conceivable to provide several models of chairs 1 each adapted to a limited range of weight and covering a wide range of weight, and that one selects according to the weight of the patient.
  • a carer can unlock the wheels 4 and raise the footrest 21 to freely move the chair 1 (with the patient) by means of the handlebar 13.
  • the patient 15 to initiate the movement of getting up, begins by leaning the bust forward, which moves its center of gravity forward and transfers part of its weight on his feet by reducing the resistance effort opposed to the deployment of the articulation mechanism 33 under the spring return effect 54.
  • the patient can use his arms by gripping the armrests 8 and leaning against it, which further reduces the weight carried by the seat 14 , to the point where the spring 54 can freely stretch by deploying the articulation mechanism 33 , which pushes the patient both upward (by the half-seat 14B rear) and forward (by the half-seat 14A before) and further lighten the weight carried by the seat 14.
  • the patient 15 thus assisted can then easily reach the posture illustrated on the figure 4 where, although his legs are still slightly bent, the effort needs to make the patient 15 to fully extend is modest.
  • the articulation mechanism 33 is not only designed to provide the patient 15 a thrust force allowing it to rise; it is designed to perform an ergonomic accompaniment movement, that is to say closer to the kinematics of the human body from sitting posture to standing posture, and vice versa.
  • the axes A, B, C, D, E, F and G are positioned (that is to say that the lower frame 34 , the upper frame 41 , the half-seat 14A before, the half rear seat 14B and coupling arm 48 are sized) such that the lower BCGF quadrilateral is convex in the folded configuration of the mechanism 33 , and concave by the axis G in the deployed configuration of the mechanism 33.
  • a quadrilateral is said to be convex when its diagonals are included in the perimeter defined by the quadrilateral, and concave when one of the diagonals is located outside this perimeter.
  • that the lower quadrilateral BCGF is concave by the axis G means that the angle between the segments GF and GC, measured on the inside of the quadrilateral BCGF, is greater than 180 °.
  • the back half-seat 14B accompanies the vertical translational movement of the pelvis (and buttocks) of the patient 15 , ie when he initiates the movement of standing up from the sitting posture, or when he finish the movement of sitting down.
  • the half-seat 14A before it is animated by a combined movement of vertical translation and rotation of low angular amplitude which accompanies both the ascent (in the case of the transition to standing posture) or the descent (in the case of transition to sitting posture) of the knee joint and rotation of the thighs around it.
  • the axis C is animated, during the translative T phase, a large amplitude upward movement of rotation, centered on the axis B (arrow F3 on the figure 6 ).
  • the complete seat 14 (half-seat 14A front and back half-seat 14B ) accompanies the rotation movement secured to the pelvis and the thighs of the patient 15 around the knee joint, which remains at substantially constant height.
  • the axis C is animated, during the rotary phase R, with a low amplitude rotational movement downwards, centered on the axis B (arrow F4 on the figure 9 ), which frees the knee joint and allows the patient 15 to complete without hindrance the extension of his legs to get up.
  • Two, three or four conditions a) to e) can be jointly satisfied.
  • all conditions a), b), c), d) and e) are jointly satisfied.
  • BF x denotes the distance between the vertical planes passing through the axes B and F, and BF z the distance between the horizontal planes passing through these same axes.
  • the articulation mechanism 33 of the chair 1 described above allows, thanks to the decomposition of the movement in two phases, namely an essentially translative phase followed (or preceded, depending on whether the patient sits or stands) d a phase essentially rotating, which makes it suitable for the kinematics of the human body.
  • the result is improved safety for the patient 15 suffering from PMWS whose symptoms rhyroidpulsion, of oppositional and stasobasophobie hypertension can thus be effectively combated.
  • This locking system acts for example on a shutter valve of a decompression vent of the spring 54, which blocks the rod 57 in position, regardless of this position.
  • the locking system is for example actuated on the handlebar 13 by means of a handle 62 manually operable and connected to the spring 54 by a cable 63 , in the manner of a bicycle brake.
  • the articulation mechanism 33 certainly adds weight to a chair that would be lacking, but this weight can remain contained, insofar as the parts that constitute it are relatively few and light enough. In total, the chair can remain relatively light. In addition, if the axes A, B, C, D, E, F and G are sufficiently greased, the mechanism 33 provides the chair 1 a high reliability, and therefore a long life.

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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)
  • Rehabilitation Tools (AREA)
EP16165866.1A 2015-05-28 2016-04-18 Fauteuil médicalisé équipé d'un système d'aide aux patients à s'asseoir et se relever Active EP3097898B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16165866T PL3097898T3 (pl) 2015-05-28 2016-04-18 Fotel medyczny wyposażony w system wspomagający pacjentów przy siadaniu i wstawaniu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1554816A FR3036615B1 (fr) 2015-05-28 2015-05-28 Fauteuil medicalise equipe d’un systeme d’aide aux patients a s’asseoir et se relever

Publications (2)

Publication Number Publication Date
EP3097898A1 EP3097898A1 (fr) 2016-11-30
EP3097898B1 true EP3097898B1 (fr) 2018-03-21

Family

ID=53524893

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16165866.1A Active EP3097898B1 (fr) 2015-05-28 2016-04-18 Fauteuil médicalisé équipé d'un système d'aide aux patients à s'asseoir et se relever

Country Status (5)

Country Link
EP (1) EP3097898B1 (pl)
DK (1) DK3097898T3 (pl)
ES (1) ES2672935T3 (pl)
FR (1) FR3036615B1 (pl)
PL (1) PL3097898T3 (pl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113599172A (zh) * 2021-08-10 2021-11-05 中国人民解放军总医院第八医学中心 一体化胸腔抽液椅

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1406420A (en) * 1971-11-03 1975-09-17 Lywood B W Seat lifting mechanism
US5984411A (en) * 1995-09-11 1999-11-16 Galumbeck; Michael H. Elevator chair
US7090297B2 (en) 2004-10-13 2006-08-15 La-Z-Boy Incorporated Heavy lift chair
US9492339B2 (en) * 2011-07-07 2016-11-15 Develop, Llc Chair, frame and lifting garment useful for patients
JP5666670B2 (ja) * 2013-04-09 2015-02-12 株式会社馬場家具 補助機構付きチェアー

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
FR3036615A1 (fr) 2016-12-02
DK3097898T3 (en) 2018-06-25
PL3097898T3 (pl) 2018-10-31
FR3036615B1 (fr) 2017-06-09
ES2672935T3 (es) 2018-06-18
EP3097898A1 (fr) 2016-11-30

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