EP4604808A1 - Dispositif de maintien et de confort - Google Patents
Dispositif de maintien et de confortInfo
- Publication number
- EP4604808A1 EP4604808A1 EP23750649.8A EP23750649A EP4604808A1 EP 4604808 A1 EP4604808 A1 EP 4604808A1 EP 23750649 A EP23750649 A EP 23750649A EP 4604808 A1 EP4604808 A1 EP 4604808A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- support
- pads
- person
- comfort
- comfort according
- 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.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/02—Seat parts
- A47C7/029—Seat parts of non-adjustable shape adapted to a user contour or ergonomic seating positions
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/02—Seat parts
- A47C7/021—Detachable or loose seat cushions
Definitions
- TITLE SUPPORT AND COMFORT DEVICE
- the invention relates more particularly not only to such a holding device capable of being placed on any kind of pre-existing support, either for support in a standing position (floor of any type) or for sitting (chair, stool, armchair, automobile seat). , mattresses, etc.) whatever the rheological characteristics (hard, flexible, deformable or not, etc.) or geometric (flat, inclined, etc.) without degrading its effectiveness, but also the addition of Such a device is fixed to supports, in particular existing seats (chair, stool, armchair, automobile seat, mattress, etc.), or integrated into the design and manufacture of a new support.
- Adopting good posture is the central element of comfort.
- the term “posture” refers to the arrangement adopted by the different body segments in the face of gravity: a posture can be balanced or unbalanced.
- Good posture is a balanced position provided that joint-muscular tensions are kept to a minimum. Whether sitting, standing or lying down, gravity affects the active and passive structures of the body in one way or another. Good posture distributes the forces constantly in action and relieves the muscles and joints.
- posture is constructed and changes throughout life in the face of external and internal constraints. The body must constantly adapt to maintain a certain balance in space (stature, balance, stability, symmetry).
- sensory sensors In response to internal and external requests, transmitted by sensory sensors - mainly the millions of proprioceptive sensors located at the level of muscle fibers, tendons and joints, as well as the eyes and the inner ear - the brain in turn orders to correct or take this or that posture. If the information received is not processed correctly, the chosen posture will be inadequate and the body will implement a certain number of compensatory strategies which can give the illusion that everything is working correctly.
- Natural movements of comfort the person must be able to constantly perform natural movements without hindrance or discomfort such as turning or tilting the head, raising the arm to grab a glass, the telephone, scratching, moving one leg forward, etc. All of these movements of more or less impactful intensity - which we call natural comfort movements - contribute to modifying the conditions of the so-called gravity balance.
- Micro-movements of stress when the pelvis is subjected to a macro-movement inscribed in the inverted cone, it generates pressure and shear on the soft parts - for example the glutes in a seated position - driven by the kinematics of movement, but stuck on the support seat. Also releasing the articulo-muscular tensions of the soft tissues is essential to release in return the permanent demand of the proprioceptive system on the brain and the associated fatigue and stress, but also to naturally stimulate the inhibition of pain.
- a more elaborate version is based on the combination of this type of seat cushion with a lumbar support cushion.
- bedsores which generally are wounds occurring in weakened people following compression of the tissues in areas where the underlying bones are flush. This compression causes a process of reduction or cessation of blood flow in the capillary vessels called ischemia. Tissue hypoxia then occurs within one to two hours and the pressure sore sets in, first in the form of redness (persistent erythema, stage 1) which will progress to the appearance of more or less deep wounds, which can become purulent, and lead to tissue necrosis.
- the existing devices are intended to relieve/reduce the pressure exerted on the body in the targeted locations and there are to date numerous devices proposed for the prevention of pressure sores of the sacrum (which cover the area of the intergluteal crease, the coccyx and the sacrum itself). All are cushion or mattress type supports. and according to the opinions established in France by the National Commission for the Evaluation of Medical Devices and Health Technologies, a distinction should be made between static supports called “low tech” according to Anglo-Saxon terminology, and dynamic supports called “high tech”.
- Additional “high-tech” seating devices are intended to help with treatment once a pressure sore has occurred or for people at high risk of developing pressure sores.
- These are “dynamic”, motorized supports, which rely on the motorization of an alternating inflation/deflation cycle of modules constituting the support.
- the problem posed is then to provide answers to the shortcomings, gaps or weaknesses of the above existing solutions, which ignore the demands on the soft parts in shearing and compression, for people who may have or suffer from pain when they are standing or sitting. or at risk of bedsores in this last position, by offering a complementary support device, to be placed on a support or to be integrated into an existing or new support, and aiming on the one hand to provide comfort by allowing these people - on the basis of the natural profile of postural balance - to maintain posture and comfort when standing or sitting and on the other hand to relieve their back and lumbar pain and their perineal pain in the broad sense (including the areas from the pubis to the sacrum), and moreover to prevent bedsores in this region of the pelvis when sitting.
- a support and comfort device allowing any person, who may have discomfort or pain problems when sitting or standing, to remain comfortably on any support on which she wants to place the lower part of her body corresponding to her sitting position (in this case her pelvis) or standing (in this case her soles), and comprising:
- the base of the device which is at least partially rigid and which rests on said support
- the first rigid part rests vertically on the support and is free to tilt relative to it in all directions around a vertical axis, like an inverted pendulum, and, thus accompanying the macro-movements of the body segments mobilized when the person adopts the sitting or standing position, this first rigid part is capable of achieving gravitational balance following these macromovements
- the second part integral with the third part is made up of articulated pads which, independently of each other, support each of the soft parts constituting the body segments and, thus accompanying the micro-movements of postural regulation, they are able to allow a release of joint-muscular tensions and each of these three parts constituting the device is free to move independently of each other and accompanies, in a coordinated and permanent manner, the micro-movements of solicitation and postural regulation of the soft parts and the macro-movements of postural balance of the person.
- the solution of the invention is based on permanent accompaniment and support of all the movements explained previously - positional macromovements, natural comfort movements, regulation micro-movements and solicitation micro-movements, - and this support allows each movement is independent of each other, while all the movements are accomplished in a coordinated manner in order to avoid joint-muscular tension beyond a threshold of discomfort or pain, then that there is to date no device which combines these different permanent actions to support these movements in the field of the invention.
- the production of devices according to the invention combine, by combining them in a permanent and coordinated manner, the macromovements of postural balance and the micromovements of postural regulation, while ensuring at the same time permanent support and even distribution of pressure on the soft tissues, regardless of the posture adopted by the person when seated.
- the device of the invention represents a radical innovation in the field of the postural chain by making possible a dynamic postural balance, unlike the static bases of the state of the art which weaken muscular tone; by design, the device of the invention is a dynamic seat which allows active positions - therefore freedom of movement - around balance, stimulating the natural adoption of an erect posture.
- Such a support and comfort device is thus a device to support dynamic postural balance for any person in a sitting or standing position because it combines permanently and independently: a first part which accompanies the macro -movements, of the inverted pendulum type, for the pelvis in a seated position, for the lower limbs in a standing position, or for the legs when the feet rest on a footrest, a second part, secured to the first by ball joint shock absorbers, which permanently and uniformly supports each of the soft parts to completely independently support micro-movements and avoid tensioning of muscle fibers and tendons, seat of the proprioceptive system, brain of the postural chain.
- the first part called the base of the device, is constituted, in a preferred embodiment (and with reference to the prior art constituted, with regard to a device for maintaining and comfort in a seated position, patent EP2381817 from the company Backjoy Orthopedics), by a fully rigid hollow part whose lower surface of curved and convex shape is rounded in all directions, including the sagittal and lateral planes,
- any part forming the second part of the device of the invention, made of more or less hard rigid material and whose upper face, supporting in the case of the seated position the buttocks and thighs of the person sitting on it, has a shape adapted to the pelvis and the thighs, preferably slightly curved, and on the other hand by "shock absorber-ball joint” any device or material made, with an upper face receiving a pad and a lower face pressing on the rigid part, a person skilled in the art being capable of producing such a device or material with his technical knowledge alone, and which allows on the one hand to collapse on itself when it is subjected to a vertical force such as the weight of a person and whose upper face can tilt, relative to its lower face, by rotation in all directions: by way of example (as represented in the figures attached as preferred embodiments) these ball joint shock absorbers can each be constituted by at least one block of high resilience foam, by an elastomer block or by at least one spring,
- the “shock absorber-ball joint/pad” assembly can be made in one piece, as is done for the studs as used in stud bases.
- the “shock absorber-ball joint/pad” assembly is intended to support the natural comfort movements and the regulation micro-movements defined previously.
- the second part of this device consists of at least four pads independent of each other, at least two of which each support one thigh of the person and at least two others each support the soft parts (right buttocks and left buttocks) anchored on the pelvis and each resting on at least one ball joint shock absorber.
- At least the second part, for a support and comfort seating device according to the invention comprises a recess whose location and shape correspond at least to the surface of the zone at risk of occurrence of pain - such pelviperineal pain - or damage, such as bedsores, of the person in a sitting position, when this area is put under pressure.
- the device according to the invention can also comprise, whether for the sitting or standing position, a fourth part arranged above the second part and made of flexible contact material supporting the lower part of the person's body, corresponding in its position,
- the result is a new device, in particular for the sitting position, which responds to the problem posed and allows, according to the characteristics above and those described below in the description of the figures: to increase seating comfort and in particular: to optimize the load-bearing surface of the body's load - a load which represents around 2/3 of the body's weight) and distribute the pressure and reduce the areas of pressure peaks, or even eliminate them; to maintain the bust in a good so-called “erect" position - alignment of ears / shoulders / hips - while allowing support for the movements (previously called “macro") of tilting of the pelvis, micro-movements regulating gravity balance, as well as the micro-movements of request and the person's natural movements such as turning or tilting the head, raising an arm, scratching, moving a leg forward, etc.; and the present invention thus has micro and macro support systems that can act in concert and independently of each other whereas the devices of the prior art only respond to macro mobility.
- the present invention satisfies the prevention of painful positions and the alleviation of the feeling of pain, as well as the prevention of pathological degradation such as bedsores and this list is not exhaustive of comfort and prevention situations. that can be satisfied by this seating device.
- the device in particular for the comfort sitting position allows any person having pain when sitting to maintain posture and sitting comfort by the combination of several functionalities: adaptation to the natural balance profile specific to each individual, by adding wedges under the base at the front or rear, facilitation by design of a thigh-spine inclination preferably between 90 and 100°, reach as the prior art gravity balance following macromovements (flexion of the bust and swinging of the pelvis on the seat so as to facilitate the alignment of the spine on the pelvis supporting the regulation of gravity balance for maintaining good posture, which allows the person to make natural movements while maintaining comfort and to carry out the necessary regulatory micro-movements without muscular tension - in other words allowing a cone of deviation around the gravitational balance without creating tension articulo-muscular which is completely innovative: the seating device according to the invention thus broadens the field of good posture configurations admissible by the seat;
- the use of the device according to the invention in a seated position can integrate the management of localized pain occurring in the area going from the sacrum to the pubis by taking into account several complementary functionalities: . elimination of contact - and therefore pressure, friction, shearing - in areas at risk of pain or damage;
- the longitudinal axis L (and along which the longitudinal cuts are made) is oriented from the back to the front of the device, i.e. from the pelvis towards the thighs of the person sitting on it
- the lateral axis or transverse T (and according to which the cross sections are made) is oriented from the right towards the left for the person seated on the device and the vertical axis V is oriented from below to the top of the device on which the person sits, and, in such a mark following the direction of the vertical axis V, the lower surfaces thus are those situated below, and that which is called superior is situated above.
- FIG. 10 schematically represents a longitudinal sectional view along X,X' of Figure 8 of the first embodiment of the device according to the invention
- FIG. 11a represents a top view of the first embodiment of the device according to the invention shown in Figures 1 and 8, but here equipped with slides in an arc of a circle centered on the joint of the hips making it possible to accompany the natural spacing thighs ;
- FIG. 12 schematically represents an elevation and front view of an example of a seat, here a stool on casters, integrating an embodiment of a seating device according to the invention.
- the articulation system of said seat base 8 can thus include a three- or four-legged mechanism (or more) of which the three or four at least constituent elements 8i, which we called fingers above, form at their lower end (or rest on) the rigid part 8' forming a common base fixed on the support 6 which is an element of the seat frame integrating the device according to the invention.
- each finger 8i is articulated in rotation relative to the common base 8', while their upper distal ends each support a “shock absorber-ball joint / pad” assembly, each element or finger 8i being limited in its possible rotation under the effect of the weight transmitted by the “shock absorber-ball joint / pad” assembly, for example by a return spring: to achieve the rotation of these elements or fingers 8i:
- the height of the shock absorber-ball joints 5i must be calculated accordingly but also the projection S8 of the surface of the first part 8 on that Su defined by the periphery (because this is valid even when the second part is made up of several independent pads as in the embodiments shown in Figures 6 to 8) of the second part 1 1, and perpendicular to it, is located inside the periphery of the surface S1 1 of the second part 1 1, as shown in Figure 2, 5, 10 and 1 1 b.
- the second part 1 1 of the device 1 is made up of two independent pads 10i supporting
- one pad I O3 supports the right foot and the other I O2 the left foot of the person, each pad relying on at least one 5i ball joint shock absorber.
- the second part 1 1 of the seating device 1 consists of at least three pads 10i independent of each other, two of them 102 , 10s at least each supporting a thigh 3i of the person and at least one other 10i and/or 104 his pelvis 9, and each resting on at least one shock absorber-ball joint 5i.
- the second part 1 1 of the seating device 1 consists of at least four pads 10i independent of each other, two of which at least each support one thigh 3 of the person and at least two others support each of the soft parts (right buttocks and left buttocks) anchored on the pelvis 9, and each resting on at least one shock absorber-ball joint 5i.
- the length of the pads receiving the pelvis 9 is greater than that of the pads receiving the thighs 3.
- the two pads 10i each supporting a thigh 3 can each perform a lateral rotation and their angle of separation in rotation is between 0 and 40° relative to the sagittal plane, these 10i pads can thus accompany the natural spacing of the thighs: for this two 13i rails are integrated into the base of the seat 8 (and on each side of it corresponding to pads 102, I O3 supporting the thighs), and each following an arc of a circle having:
- the comfort seating device 1 also comprises a fourth part 7 arranged above the second part 1 1 and made of flexible contact material, supporting, for a device seat, the pelvis 9 and the thighs 3 of the person, and, for a balance board or a foot rest, the soles of the latter's feet, and this fourth part 7 can be made up of as many independent elements than the second part 1 1, each of these elements being arranged above the pads 10 which constitute the second part 1 1 and having at least the same surface dimensions as the latter
- the device according to the invention can consist of a shell with a spherical base 8 or any other device - structure in rigid hoops or made up of blade spring, board bridged on springs, board mounted on silent block, etc. - which rests on any 6 plane support, which in this case is generally the ground, making it possible to accompany the general postural movement of an inverted pendulum, inscribed in an inverted cone of more or less large diameter.
- a shock absorber ball joint represented, in Figures 2 and 3 in one embodiment, by springs 5i and 52 but can - as described previously for the achievements "seat cushions" - made from a block of high-density foam, an elastomer, a silent block joint - ... intended to accommodate the soles of the feet and to finely accompany the movements of these two body segments, which makes it easier to work muscles without inducing damaging or painful tensions, and allowing longer use of the balance board.
- the I O2 and I O3 pads must adapt to the natural spacing of the feet, which generally corresponds to the width of the shoulders (on average 35 to 50 cm for women and 40 to 55 cm for men) and taking into account the average width of the feet (8 to 10 cm for women and 9 to 11 cm for men) and their length (22 to 26 cm for women and 24 to 28 cm for men ) these pads could preferably be sized with a width of 20 cm and a length of 35 cm and the ball joint shock absorbers 5i of these pads 10i supporting the soles of the feet are fixed at their lower part on self-locking guides 20 inserted and sliding in at least a rail 19 secured to the first part 8 and arranged transversely: these guides 20 are thus able to adjust, by movement N'N along the rail 19, to the spacing of the person's feet: the rail 19, forming a width adjustment rule, can allow a distance between internal edges of the pads I O2 and I O3 of the order of 10 cm in the minimum spacing position and 35 cm in the maximum spacing position
- the inventive device also aims to adapt the seating conditions to the different "natural" postural balance profiles of each person because as already explained previously, the erect position of the human being and bipedal walking are possible thanks to a spinopelvic balance which responds to a coherence between parameters specific to the pelvis and others to the spine, and each individual has its own spinopelvic anatomical characteristics which are the result of all the postures adopted during childhood, and fixed at the end of growth and the most important anatomical parameter to evaluate spinopelvic stability is the pelvic incidence which reflects the base on which the vertebral column rests. However, the variability of pelvic incidence in the human population is 53° ⁇ 10°. This then defines 3 types of distinct natural balance profiles as already indicated previously: .
- Postural regulation is then done around the natural balance profile of each type of profile and to reproduce this natural postural balance in a seated position, it is necessary to be able to maintain the initial tilting of the pelvis linked to each of the natural profiles, in order to then be able to regulate postural balance around this reference position.
- wedges 21 for adjusting the tilting of the base of the seat in order to force it either in retroversion (inclined towards the rear), or in anteversion (leaning forward). And we do not have a wedge to leave the seat free in a neutral position (i.e. horizontal in balance).
Landscapes
- Orthopedics, Nursing, And Contraception (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2210704A FR3140745B1 (fr) | 2022-10-17 | 2022-10-17 | Dispositif d’assise de confort |
| PCT/FR2023/051034 WO2024084137A1 (fr) | 2022-10-17 | 2023-07-05 | Dispositif de maintien et de confort |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4604808A1 true EP4604808A1 (fr) | 2025-08-27 |
Family
ID=85122503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23750649.8A Pending EP4604808A1 (fr) | 2022-10-17 | 2023-07-05 | Dispositif de maintien et de confort |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4604808A1 (fr) |
| FR (1) | FR3140745B1 (fr) |
| WO (1) | WO2024084137A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12256847B1 (en) * | 2024-08-29 | 2025-03-25 | Guangzhou Likegao Import & Export Co., Ltd | Seat cushion |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US621139A (en) * | 1899-03-14 | Bicycle-saddle | ||
| DE19915003A1 (de) * | 1999-04-01 | 2000-10-05 | Michael Stips | Sitzvorrichtung und Verfahren zu ihrer Steuerung |
| US7607738B2 (en) | 2005-09-15 | 2009-10-27 | Matthew Wayne Gregory | Contoured seat and method |
| JP5502901B2 (ja) | 2009-01-23 | 2014-05-28 | バックジョイ・オーソティックス・リミテッド・ライアビリティ・カンパニー | 動的に姿勢を矯正するための方法と器具 |
| WO2013103188A1 (fr) * | 2012-01-02 | 2013-07-11 | Cho Young Hyeg | Dispositif de siège adapté à un utilisateur |
| WO2016053321A1 (fr) | 2014-09-30 | 2016-04-07 | Backjoy Orthotics, Llc | Appareil et système permettant de corriger de façon dynamique la posture |
| WO2019191657A1 (fr) | 2018-03-30 | 2019-10-03 | Backjoy Orthotics, Llc | Siège ergonomique |
-
2022
- 2022-10-17 FR FR2210704A patent/FR3140745B1/fr active Active
-
2023
- 2023-07-05 WO PCT/FR2023/051034 patent/WO2024084137A1/fr not_active Ceased
- 2023-07-05 EP EP23750649.8A patent/EP4604808A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3140745B1 (fr) | 2024-11-29 |
| WO2024084137A1 (fr) | 2024-04-25 |
| FR3140745A1 (fr) | 2024-04-19 |
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