WO2013108058A1

WO2013108058A1 - Self-adjusting chair

Info

Publication number: WO2013108058A1
Application number: PCT/IB2012/000075
Authority: WO
Inventors: Simone PETRONIO
Original assignee: Petronio Simone
Priority date: 2012-01-19
Filing date: 2012-01-19
Publication date: 2013-07-25
Also published as: TW201330802A

Abstract

Self-adjusting chair (10) comprising a plurality of supports (1, 2, 3sx, 3dx, 4sx, 4dx, 5sx, 5dx, 6sx, 6dx) for articular fixed points of the human body, the supports being fixed to the ground through at least one respective rod (1C, 2C, 3sxC, 3sxCC, 3dxC, 3dxCC, 4sxC, 4dxC, 5sxC, 5sxCQ, 5dxC, 5dxCC, 6sxC, 6sxCC, 6dxC, 6dxCC) having an end (7) coupled to the support and an opposite ground end (8) coupled to the ground end (8) of the rod of another support, such ground end being associated to pedestals (91-94) having a common longitudinal axis (X) along which the pedestals can be approached to each other, for foldingly closing the self-adjusting chair, or spaced during use, for arranging the supports in a configuration for adapted to receive the articular fixed points, such supports being separately reclinable on said at least one respective rod due to the weight exerted on the supports by the human body during the use.

Description

TITLE: Self-adjusting chair.

Field of application

The present invention relates to a self-adjusting chair. In particular, the invention refers to a self-adjusting chair with a plurality of ergonomic supports intended to support the human body in a substantially supine or seated position, such supports only interesting preset portions of the body, preferably articular fixed portions. In particular the invention relates to a self-adjusting chair for the postural re-balance of the user.

Prior art Self-adjustable chairs for domestic or therapeutic use, comprising a height-wise adjustable seating, two armrests, also adjustable height-wise, and a backrest, are known. The inclination of the backrest is self-adjustable based on the movement of the user on the chair, substantially retracting at a right angle with respect to the seat, if the user seats in a composed manner with his/her back straight, or reclining backwards if the user weighs on the backrest, assuming a more relaxed posture on the seat. Some of the self-adjustable chairs are also provided with a support for the feet or feet-rest and/or a head-rest, also adjustable height-wise. The seat is ground-fixed through a pedestal fixed with respect thereto or provided with rotatable wheels. The height-wise adjustment is useful due to the fact that it allows adapting the chair to persons of different stature; actually, varying the distance between the seating and the ground or the feet-rest, it is possible to vary the stretching of the legs, just like varying the height of the two armrests allows varying the stretching of the upper limbs, or varying the headrest allows differently receiving the nape or cervix.

The above-indicated self-adjustable chairs however reveal some drawbacks which do not allow for an optimal comfort to the users affected by some pathologies, lesions or muscular or articular trauma and in particular they do not allow for a cure or an improvement of lesions and trauma, thus preventing the use of the chair for therapeutic or treatment purposes, also in a domestic environment and in an entirely autonomous manner. In particular, in known self-adjustable chairs, the seating and the backrest are supports which support almost the entire part of the body intended to receive; for example, during use, the entire back of the user is substantially in contact with the backrest and the ischial area entirely rests on the seating. The coupling thus made between the parts of the chair and the human body, during use, hinders an effective relaxing of the articulations and of the muscles which are compressed against the chair, hindering the stretching of the aching parts, for example as a result of sports, postural or stress-related trauma.

Furthermore, the known self-adjustable chairs are not suitable for relieving, or solving problems of people with muscular or articular asymmetries, also in such case caused by sports accidents or congenital diversities.

The technical problem subject of the present invention is to provide a self- adjusting chair which offers a better comfort and a considerable general relaxation on all users, including people affected by muscular or articular disorders, temporary or long-lasting, and structured to receive the human body so as to stretch the muscular bundles without intervening on the aching point, following the position desired by the user and self-adjusting to the weight thereof or to the body specificities thereof such as postural traumatic and congenital asymmetries, facilitating a re-balance of the posture and overcoming the drawbacks revealed by the known chairs up to date. Brief description of the drawings

Figure 1 represents, in a perspective view, the self-adjusting chair, in an open operating phase, according to the present invention. Figure 2 represents, in a top view, the self-adjusting chair of figure 1.

Figure 3 represents, in a front view, the self-adjusting chair of figure 1.

Figure 4 represents, in a side view, the chair of the present invention, in closed phase. Figure 5 represents, in a front view, the chair of figure 4.

Figure 6 represents, in a perspective view, the chair of figure 5. Summary of the invention

The solution idea subject of the present invention is to ground-fix a plurality of supports for articular fixed points of the human body through at least one respective rod on which the support is separately inclinabile, due to the weight exerted during the use by the corresponding articular fixed point.

A ground end of the rod opposite to that for fixing the support is coupled to the ground end of a rod of another support, and both rods are abutted on pedestals having a common longitudinal axis along which they can be approached to each other, for closing the chair in a bellow-like or packet manner, approaching the rods, or diverged, arranging the supports in a configuration adapted to receive the articular fixed points, at a predefined distance, selected depending on the height of the person or the structural or body characteristics thereof.

Central supports along the longitudinal axis are adapted to receive the dorsal and cervical area, and opposite lateral supports with respect to the longitudinal axis, are adapted to receive a left and right ischial area, for sitting, a left hand or left wrist and a right hand or right wrist, a left popliteus and a right popliteus, a heel and/or left and right posterior tibia.

The supports have a considerably small surface with respect to the known chairs, so as to leave a large surface of the human body hanging on allowing a natural relaxation, due to gravity. According to an aspect of the invention, one or more pairs of rods are coupled through a ratchet system. For example, the ratchet system is mounted on one of the two rods of the pair comprising a toothed wheel integrally fixed to a pin and rotatable in a seat of the rod, and two different spouts coplanar with the toothed wheel and alternatively in contact therewith. Each spout is angularly movable from an end stop position, in which it interferes with the teeth of the toothed wheel, preventing the rotation thereof in one direction, to a rest position, in which it is not in contact with the wheel.

An inversion lever coplanar to the spouts is actuatable for displacing a spout from the end stop position to the rest position and the other spout from the rest position to the end stop position, allowing for an opposite angular movement of the rod. Another rod of the pair comprises a lock with shape-coupling on the pin, being integral thereto.

Further characteristics and advantages of the present invention will be evident from an embodiment thereof provided for exemplifying and non limiting purposes, with reference to the attached figures.

Detailed description

With reference to the attached drawings, a self-adjusting chair according to the present invention, comprising a plurality of supports 1 , 2, 3sx, 3dx, 4sx, 4dx, 5sx, 5dx, 6sx, 6dx adapted to support some parts of the human body in a substantially supine position is schematically represented and entirely indicated with reference number 10.

Such supports are adjustable height-wise from the ground and in mutual distance so as to support the aforementioned parts of the human body, however leaving most of the surface of the body, i.e. almost the entire back, waist, neck and nape, thighs and or calf, the forearms and/or the biceps suspended in midair, between two or several supports. In particular, the parts of the human body intended to be rested on the supports of the chair are indicated hereinafter as articular fixed points and preferably comprise joints. The supports are fixed to the ground through at least one respective rod 1 C, 2C, 3sxC, 3sxCC, 3dxC, 3dxCC, 4sxC, 4dxC, 5sxC, 5sxCC, 5dxC, 5dxCC, 6sxC, 6sxCC, 6dxC, 6dxCC having an end 7 facing towards the support provided with a hinge and an opposite ground end 8 provided with a means for coupling to the rod of another support and fixed to a pedestal 91 -94 common between the two rods. In particular, a plurality of pedestals 91-94 of the self- adjusting chair has a common longitudinal axis X along which they can be approached, for closing the chair in a foldable manner, and spaceable, for the use of the chair, allowing the user to be positioned substantially supine, with the body supported by the supports alone, in the articular fixed points. The supports are self-adjustable on the end 7 of the rod, substantially rotating by a predefined angle, due to the weight exerted during the use by said human body on the supports, and in particular following the natural position of the body in case of muscular or skeleton asymmetries or muscular or articular trauma. The angle of each support is thus determined by the body specificity, in terms of muscular, articular and skeleton system of the user, as well as the temporary or permanent pathologies thereof, with respect to a rest position in which each support is substantially parallel to the ground, with the pedestals spaced from each other to receive the user. For example, with reference to the view of figure 1 , two separate supports 3sx and 3dx are provided for the person's seating; each support is coupled to two different rods: the support 3sx is coupled to one end 7 of the rod 3sxC which has an opposite ground end 8 coupled to the ground end 8 of the rod 5sxCC of another support 5sx, which is advanced towards the person's feet with respect to the support 3sx; the support 3sx is also coupled to the end 7 of another rod 3sxCC which has an opposite ground end 8 coupled to the ground end 8 of the rod 2C of another support 2 which is receded backwards towards the person's head. Similarly, the support 3dx is coupled to an end 7 of the rod 3dxC which has an opposite ground end 8 coupled to the ground end 8 of the rod 5dxCC of another support 5dx, which is extended towards the person's feet with respect to the support 3dx, and it is also coupled to the end 7 of another rod 3dxCC which has an opposite ground end 8 coupled to the ground end 8 of the rod 2C of the head support 2.

The rods 3sxC, 3sxCC, 3dxC, 3dxCC are hinged in pairs on the end 7 associated to the supports: the rod 3sxC with the rod 3sxCC and the rod 3dxC, 3dxCC. Furthermore, the advanced rods 3sxC and 3dxC abut against the pedestal 93 which is closest to the person's feet, at the ground ends 8, while the retracted rods 3sxCC and 3dxCC abut against the pedestal 94 which is closest to the person's head. The pairs of rods 3sxC, 3sxCC and 3dxC, 3dxCC can be separately opened from a closed packet position, in which the two rods of the pair are substantially superimposed, to a predefined angle a of use. In an embodiment of the invention, the ground ends 8 of the two pairs 3sxC-3dxC and, 3sxCC-3dxCC of rods are constrained through the relative pedestal 93-94 to an equivalent angular inclination, which allows for a symmetric positioning of the supports 3sx, 3dx abutting against the opposite ends 7 of the rods 3sxC-3dxC and, 3sxCC- 3dxCC.

In an embodiment, the means for coupling the ground ends 8 of the rods are provided by means of a teeth joint with several manual lock gripping positions. Each gripping point corresponds to a different angle (α, β, γ) of the rods and to a different spacing (Y, Z, W) of the pedestals, for example at a different angle of the rods 3sxC-5sxCC and 3dxC-5dxCC and at a different distance of the pedestals 93, 94. A manual spring button or a threaded knob allows securing the engagement of the teeth joint, when the chair is positioned for the use or folding closed, and free the engagement of the joint for the opening and closure manoeuvre.

In an embodiment, the ground ends 8 comprise a ratchet-like system for fixing the rods. For example, the fixing system comprises a toothed wheel integral with the ground end 8 of a first rod and a spout or tooth integral with the ground end 8 of a second rod, the first and the second rod being coupled so that the tooth is coplanar to the toothed wheel and allows for the movement of the rod in only one rotation direction, for diverging the rods. The movement in the opposite direction is hindered by the interference of the spout with the teeth of the toothed wheel, guaranteeing to keep a predefined opening angle between the rods, during use. When closing, the tooth is decoupled from the toothed wheel, for example it is displaced on a plane different from the plane of the toothed wheel, displacing one of the two rods perpendicularly to the plane; such decoupling allows approaching the rods, closing the self-adjusting chair in a folding manner.

In other words, according to the present invention, it is provided for that the moveable part of a ratchet system is cast on the end of a rod intended to be coupled with another rod while the fixed part of the ratchet system is cast on the end of the other rod. In this alternative embodiment it is possible to avoid using bolts or teeth couplings. Preferably, the ratchet fixing system is also associated to the ends 7 of the rods.

Advantageously, the ratchet fixing system allows supporting a large weight on the corresponding support.

Figures 7a and 7b represent a sectional view and a front view of a rod 3sx which comprises a ratchet system, according to another aspect of the present invention. The rod 3sx comprises a toothed wheel 99 integrally fixed to a pin 101 , for example a square-shaped pin, and it is rotatable together with the pin 101 in a seat 104 of the rod 3sx. Two different spouts or teeth 100a, 100b, coplanar with the toothed wheel 99, are alternatively in contact therewith. Each spout 100a, 100b is angularly movable from an end stop position, in which it interferes with the teeth of the toothed wheel, to a rest position, in which it is not in contact with the wheel. For example, in figure 7a, the spout 100b is in the rest position and the spout 00a is in the end stop position.

The spout may be kept in pressing contact with the wheel, in the end stop position, through elastic means. The spout 100a in the end position, with the tip 100ap inserted between the teeth of the wheel, prevents the rotation in a direction of the toothed wheel 99 (in figure 7a, the clockwise rotation); the rotation in the opposite direction is instead allowed by a slight angular movement of the spout, towards the rest position, during which the elastic means maintain the spout in contact with the toothed wheel.

An inversion lever - schematically represented in figure 7b, coplanar to the two spouts 100a and 100b and with respect to which the spouts are opposite - is actuatable for displacing a spout, for example the spout 100a of figure 7a, from the end stop position to the rest position, and the other spout, i.e. the spout 100b, from the rest position to the end stop position, thus allowing an opposite angular movement of the rods. It is also provided for that, in a central position, represented in figure 7b, the inversion lever serves as a lock.

A second rod, for example the rod 5sx, can be coupled to the rod 3sx through the pin 101 ; for example, the rod 5sx may have a square-shaped section adapted to receive the pin, together with which it is rotatable.

Preferably, at least the part of the pedestal intended to contact the floor is made of rubber or plastic or covered with such materials, to avoid damaging the floor.

According to another embodiment, the rods 3sxC-3dxC and 3sxCC-3dxCC are freely and manually openable from the folding closing position to the predefined angle, and vice versa. Starting from the predefined angle, elastic means, which contrast the further opening of the rods, due to the weight of the body on the support, however allowing a height-wise self-adjustment of the support and thus a self-spacing of the pedestals, come into tension. What has been described above with reference to the supports 3sx and 3dx and to the relative rods 3sxC-3dxC and, 3sxCC-3dxCC can be applied to a plurality of supports of the self-adjusting chair which are arranged along the longitudinal axis X or astride with respect thereto. More in particular, the self-adjusting chair comprises central supports 1 , 2 aligned to the longitudinal axis X, preferably at least one dorsal support 2 and a cervical support 1 , and lateral supports 3sx, 3dx, 4sx, 4dx, 5sx, 5dx, 6sx, 6dx from opposite sides of the longitudinal axis X. The lateral supports comprising left supports 3sx, 4sx, 5sx, 6sx and right supports 3dx, 4dx, 5dx, 6dx, preferably a support 3sx for a left ischial area, substantially sitting area, and a support 3dx for a right ischial area, for sitting, a support 4sx for a palm of the left hand or left wrist and a support 4dx for a palm of the right hand or right wrist, a support 5sx for a left popliteus and a support 5dx for a right popliteus, a support 6sx for a heel and/or left posterior tibia and a support 7dx for a heel and/or right posterior tibia.

Preferably, the distance of each of the lateral supports with respect to the longitudinal axis X can be adjusted in such a manner to adapt the chair to people having a sturdier build or with a heavier bone structure, moving the supports away from the longitudinal axis X, or nearing the supports for the slimmer people. For example, a tubular, as schematically represented in the top view of figure 2, with reference to the supports 4sx and 4dx, may be provided mounted on the axis of the hinges of the end 7 of the rods, on such tubular the support 4sx and 4dx being slidable for adjustment. Advantageously, the adjustment of the lateral supports intended to receive two corresponding right and left articular fixed points, for example the supports of the right and left popliteus, may be adjusted at different heights, allowing adapting the chair to a person with a contracture on one of the poplitei which should be stretched differently with respect to the healthy popliteus. According to an aspect of the present invention, only some of the supports 3sx, 3dx, 5sx, 5dx, 6sx, 6dx are fixed to the ground through two respective rods 3sxC, 3sxCC, 3dxC, 3dxCC, 5sxC, 5sxCC, 5dxC, 5dxCC, 6sxC, 6sxCC, 6dxC, 6dxCC, hinged to each other at an end 7 opposite to the ground end 8, in which a first rod 3sxC, 3dxC, 5sxC, 5dxC, 6sxC, 6dxC fixes the support 3sx, 3dx, 5sx, 5dx, 6sx, 6dx to a first pedestal or advanced pedestal 91 -93 and a second rod 3sxCC, 3dxCC, 5sxCC, 5dxCC, 6sxCC, 6dxCC fixes the support 3sx, 3dx, 5sx, 5dx, 6sx, 6dx to a second pedestal or receded pedestal 92-94 at the ground ends 8. Preferably, the supports fixed to two respective rods are the supports of the left and right ischial area, the support of the left and right popliteus and the support of the heel and/or left and right posterior tibia. Obviously, several supports may be fixed to one or more rods.

Other supports, preferably the support 1 of the cervix and the support 2 of the latissimus dorsi muscle are fixed to the end 7 of only one rod C and 2C, having an opposite ground end 8 abutting with the ground ends 8 of the rods 3sxCC and 3dxCC of the supports 3sx and 3dx of the ischial area.

The articulated structure of rods of the self-adjusting chair described above may be subjected to various modifications. For example, in an embodiment of the present invention, also the rod 2C is provided with two opposite articulated ends: the end 7 allows for the rotation and adjustment of the support 2 and the ground end 8 is articulated with respect to the rod 1 C so as to be adjusted at a suitable distance from the rod 1 , like in figure 1 , for receiving the dorsal area, or approached thereto, substantially aligned, for the folding closure. In other words, even though figure 4 represents an embodiment of the chair in which, in the folding closure, the rod 1 C is angularly spaced from the rod 2C, embodiment variants are provided in which the latter is articulated, to be aligned to the rod 1 C when closed. Analogously, it is provided for that the pedestals 91- 94 are rotatable, thus being entirely aligned to the respective rods in the folding closure of the chair. Such configuration of the pedestals and rods further reduce the overall dimensions of the self-adjusting chair.

All supports 1 , 2, 3sx, 3dx, 4sx, 4dx, 5sx, 5dx, 6sx, 6dx are advantageously rotatable on the end 7 or on the adjustment tubular associated thereto and they are anatomically shaped for accommodating the articular fixed point intended to receive them. Thus, after the user diverges - at will or according to the physical configuration thereof or the needs thereof for treating the rods of the adjustable chair thus configuring the supports at a preferred height from the ground and mutual distance - he/or she may climb on the chair, first positioning the ischial area on the respective supports 3sx and 3dx and subsequently the popliteus, heels, latissus dorsi muscle and cervix on the other supports. Obviously, the user may climb on the self-adjusting chair by performing a series of different movements, i.e. supporting the various areas of the body in another sequence with respect to the one indicated above. While resting each of said parts of the body or articular fixed points, each of the supports adjusts itself depending on the weight to be supported and the distribution of such weight on the surface of the support. It was also observed that the patient tends to weigh less on the articular fixed points corresponding to areas of muscular contracture or to support only one less aching part of the articular fixed point, in such case the respective support adjusts itself, inclining so as to avoid stresses on the aching part of the body. Should the pain reduce following a gradual relaxation of the muscular structure, the user is lead to exploit the entire point of support, leaving more weight to weigh thereon, causing a rotational adaptation of the support on the rod or on the tubular, as well as a rotation on the respective rods or tubulars of the other supports, which compensate the modified distribution of the patient's weight on the self-adjusting chair.

Figure 4 represents a side view of the self-adjusting chair, folding closed. All pedestals are approached and the rods of a support are substantially aligned and approached to the aligned rods of the other supports. Also the individual support rods of the cervical support and of the dorsal support are approached to the other rods. The pedestals are preferably shaped to form a Δ or a boomerang of increasing size starting from the pedestal 91 of the support 6sx to the pedestal 94 of the support 1 , with the vertex of the Δ or boomerang facing towards the support of the heels; such structuring of pedestals allows distributing most weight of the trunk of the bigger body on the pedestal 94 and inserting the vertex of a Δ or boomerang-shaped pedestal within another pedestal, in the folding closure, reducing the overall dimension of the self- adjusting chair. As clear from figure 4 as well as from figure 5 or 6, the supports are oriented differently with respect to the rest positions thereof with the chair open for the use, given that they are rotated together with the respective rods. From such folding closed configuration, the self-adjusting chair can be opened below-like, by spacing the pedestals and the supports.

In a preferred embodiment of the invention, the supports are associated to a frequency treatment device, even more preferably a bone conduction device, and they are covered with rubber or other material adapted to isolate the frequencies applied by a device on a support by the other supports, also allowing a differentiated frequency treatment of the various articular fixed points and an advantageous propagation of such treatment to the areas corresponding to the articular fixed points.

Furthermore, it is provided for that the pedestals, the supports and the rods be covered with a titanium dioxide (Ti0₂)- based nanostructured material.

Titanium dioxide has advantageous characteristics for the field of application in question. In particular, in presence of UV rays, for example in presence of daylight, neon lights, it exerts an antiviral and antibacterial action. In case of application of UV rays titanium dioxide guarantees a considerable resistance to the corrosive action of chemical products for domestic use and it is substantially invulnerable to cosmetic agents. The supports and the rods covered with Ti02 are not vulnerable to humidity or vapour and they are biocompatible and non- allergic, also at direct or prolonged contact with the human skin they are intended to support. Furthermore, the intensity and the brightness of the covering colour is guaranteed over an unlimited period of time.

According to another aspect of the present invention, it is also provided for that the adjustable chair comprises one or more pedestals or supports or rods that are covered with a material other than the covering materials of the other pedestals, supports or rods; such different material is adapted to differently transmit the applied frequency treatment from the associated device, with respect to the other materials. Similarly, the supports may be made of different materials to facilitate a better and diversified frequency propagation. According to an aspect of the present invention, the self-adjusting chair is made of stainless steel. Each support is isolated through coverings made of rubber part of the hinges. The width of the chair measures about 400 mm, the maximum height with the chair folding closed is of about 800 mm.

The self-adjusting chair of the present invention weighs about 2 kg and it can be entirely folded on itself, thus becoming advantageously portable and storable in a small storeroom after use.

Some advantages of the present invention are described below. Advantageously, the self-adjusting chair is suitable for everyone, including people with evident asymmetries of the upper or lower limbs. Bone conduction frequency treatment devices can be usefully and simply applied to one or more of the supports, allowing for a differentiated treatment of the body parts associated to the articular fixed point supported by the support, isolating the frequencies from the other supports, and thus preventing from influencing the treatment or the stillness of the body associated to other articular fixed points. Advantageously, the self-adjusting chair maintains most of the human body suspended, but excluding the articular fixed points, eliminating compressions, skeletal-muscular alterations that occur in the known chairs or seats such as "chaise longue", sofas, deck-chairs, chairs and armchairs. The applicant observed that the self-adjusting chair of the present invention facilitates the natural extension of the cervical portion through the self-adjustment of the cervical support, as well as an ideal distribution of the venous, arterial and lymphatic circulation, cardiac and respiratory frequency drop, attained through a greater alveolar use, as well as relaxation of the musculotendinous tension. Advantageously, the supports of the chair only support the articular fixed points, allowing the body parts remaining suspended to weigh freely downwards in absence of constraints and resistance, thus attaining a progressive and advantageous extension and de-tensioning of the musculotendinous structure. The applicant also observed that a further advantage in the use of the chair when preparing a correction treatment such as a specialised massage, fisiokinesitherapy, chiropractic, frequency treatments, supplementary therapies in general, helping the neuromuscular system to be corrected from long-term postural diversions. Advantageously, the self-adjusting chair has a passive therapeutic function, supporting the patient only on the supports and using the gravity of the body thereof to facilitate the relaxation of the muscular, teendinous and articular structure, and it also has the active therapeutic function, efficiently stimulating the system during relaxation and in absence of compressive contractions. Advantageously, the self-adjusting chair eliminates or considerably reduces - right from the first sessions - possible perceptions of discomfort for the user such as short-term sharp pangs, discomfort and sense of tension, derived from manifest or latent conditions of postural situations or from stress of upper level or depending on excessive weight ill-managed by the nervous system. The continuation and consolidation of a muscular relaxation situation are maintained by the continuous use of the chair.

Obviously, the chair can be used combined with other therapies or for household self management. Regarding this, the arrangement of the supports allows attaining a non-declivous rest and a better digestion. The chair avoids gastroesophageal reflux, allowing the diaphragm to be free, even in case of laxity or in presence of "chronic" stomach swelling.

Claims

1. Self-adjusting chair (10) characterised in that it comprises a plurality of supports (1 , 2, 3sx, 3dx, 4sx, 4dx, 5sx, 5dx, 6sx, 6dx) for articular fixed points of the human body, said supports being fixed to the ground through at least one respective rod (1 C, 2C, 3sxC, 3sxCC, 3dxC, 3dxCC, 4sxC, 4dxC, 5sxC, 5sxCC, 5dxC, 5dxCC, 6sxC, 6sxCC, 6dxC, 6dxCC) having an end (7) coupled to the support and an opposite ground end (8) coupled to the ground end (8) of a rod of another support, said ground ends being associated to pedestals (91-94) having a common longitudinal axis (X) along which the pedestals can be approached to each other, for foldingly closing the chair, approaching the rods, or can be distanced, during use, diverging the rods for arranging the supports in a configuration adapted to receive the articular fixed points, such supports being separately reclinable on said end (7) of the rod, due to the weight exerted during the use by said human body on the supports. 2. Self-adjusting chair (10) according to claim 1 , characterised in that said supports comprise central supports (1 ,

2) aligned to said longitudinal axis, preferably comprising a dorsal (2) and a cervical (1) support, lateral supports (3sx, 3dx, 4sx, 4dx, 5sx, 5dx, 6sx, 6dx) arranged on opposite sides of said longitudinal axis (X), said lateral supports comprising left supports (3sx, 4sx, 5sx, 6sx) and right supports (3dx, 4dx, 5dx, 6dx), preferably a support (3sx) for a left ischial area, and a support (3dx) for a right ischial area, substantially a sitting area, a support (4sx) for a palm of the left hand or left wrist and a support (4dx) for a palm of the right hand or right wrist, a support (5sx) for a left popliteus and a support (5dx) for a right popliteus, a support (6sx) for a heel and/or left posterior tibia and a support (7dx) for a heel and/or right posterior tibia.

3. Self-adjusting chair (10) according to claim 1 or 2, characterised in that some of said supports (3sx, 3dx, 5sx, 5dx, 6sx, 6dx) are fixed to the ground through two respective rods (3sxC, 3sxCC, 3dxC, 3dxCC, 5sxC, 5sxCC, 5dxC, 5dxCC, 6sxC, 6sxCC, 6dxC, 6dxCC), hinged to each other at and end (7) opposite to the ground end (8), a first rod (3sxC, 3dxC, 5sxC, 5dxC, 6sxC, 6dxC) fixes the support (3sx, 3dx, 5sx, 5dx, 6sx, 6dx) to a first pedestal or advanced pedestal (91-93) and a second rod (3sxCC, 3dxCC, 5sxCC, 5dxCC, 6sxCC, 6dxCC) fixes the support (3sx, 3dx, 5sx, 5dx, 6sx, 6dx) to a second pedestal or receded pedestal (92-94) at the ground ends (8), said supports fixed to two respective rods being preferably the supports of the left and right ischial area, the support of the left and right popliteus and the support of the heel and/or left and right posterior tibia.

4. Self-adjusting chair (10) according to claims 1-3, characterised in that the coupled ground ends (8) of the rods are associated to a teeth joint with several manual lock gripping positions, each gripping position corresponding to a different angle (α, β, γ, ...) of the coupled rods and to a different spacing (Y, Z, W) of the pedestal associated thereto with respect to the other pedestals of the adjustable chair.

5. Self-adjusting chair (10) according to claim 4, characterised in that it comprises a manual spring button or a threaded knob which locks an engagement of the teeth joint, when the chair is positioned for use or folding closed, and unlocks said engagement for the chair opening and closing manoeuvre.

6. Self-adjusting chair (10) according to claims 1-3, characterised in that the rods are freely and manually openable from the folding closed position to a predefined angle, and vice versa, and elastic means of said rods are arranged to be tensioned from the predefined angle, under the action of the weight of the body on the support during use, to hinder a further opening of the rods allowing a height-wise self-adjustment of the support and an autonomous setting of the distance of the pedestals.

7. Self-adjusting chair (10) according to claims 1-3, characterised in that the ends (7, 8) of one or more pairs of rods are coupled through a ratchet system.

8. Self-adjusting chair (10) according to claim 7, characterised in that a rod of said pair comprises a toothed wheel (99) integrally fixed to a pin (101) and rotatable in a seat (104) of the rod, and two different spouts (100a, 100b) coplanar with the toothed wheel (99) and alternatively in contact therewith, each spout being angularly movable from an end stop position, in which it interferes with the teeth of the toothed wheel (99), preventing the rotation thereof in only one direction, to a rest position, in which it is not in contact with the wheel.

9. Self-adjusting chair (10) according to claim 8, characterised in that it comprises an inversion lever coplanar to the spouts (100a, 100b) and actuatable for moving a spout from the end stop position to the rest position and the other spout from the rest position to the end stop position, allowing an opposite angular movement of the rod.

10. Self-adjusting chair (10) according to claim 8, characterised in that another rod of said pair comprises a block shape-coupled with said pin (101).

1 1 . Self-adjusting chair (10) according to any one of the preceding claims, characterised in that at least one part of the pedestal intended to contact the floor is made of rubber or plastic or covered with rubber or plastic.

12. Self-adjusting chair (10) according to any one of the preceding claims, characterised in that said supports (1 , 2, 3sx, 3dx, 4sx, 4dx, 5sx, 5dx, 6sx, 6dx) are rotatable on the end (7) associated thereto and they are anatomically shaped for accommodating the articular fixed point intended to receive.

13. Self-adjusting chair (10) according to any one of the preceding claims, characterised in that each of said lateral right supports is differently adjustable by the respective left lateral support, for following postural asymmetries of the human body.

14. Self-adjusting chair (10) according to any one of the preceding claims, characterised in that said supports are associated to a bone conduction frequency treatment device and they are covered with rubber or other material adapted to isolate the frequencies applied by a device on a support by the other supports, allowing a differentiated frequency treatment of the articular fixed points.

15. Self-adjusting chair (10) according to any one of the preceding claims, characterised in that the pedestals, one or more of the supports and the rods are covered with titanium dioxide (TiO₂)-based nanostructured material.

16. Self-adjusting chair (10) according to any one of the preceding claims, characterised in that one or more of said pedestals or supports or rods are covered with or made of a material other than the covering materials or the materials the other pedestals, supports or rods are made of, said different material being adapted to differently transmit the applied frequency treatment with respect to the other materials.