Chair

Abstract

The invention relates to a chair for supporting a person in a standing position, in particular in a leaning position. The chair comprises: - an upper body section forming an upper body support surface that is adapted or adaptable to at least parts of the front or back of the torso of a person sitting on the chair, and - a lower body section forming a lower body support surface that is adapted or adaptable to at least parts of at least one front of the thigh of the person supported in a standing position, wherein the upper body section and the lower body section can be fixed in a position relative to each other such that the upper body support surface and the lower body support surface cause a hyperextension of the hip joint of the person supported in a standing position with a predetermined hyperextension angle.By shaping the hyperextension angle of the hip on the chair, a shortening of the anterior thigh and hip muscles can be counteracted by limiting the upper body contact surface and the lower body contact surface to an angle of less than 180° in the hyperextension direction, whereby a hip counter-support element adjustable in its position is provided, which is designed to be placed against the back of the person's hip, and which can be fixed in a position such that it prevents the person's hip from moving out of position.

Description

[0001] The present invention relates to a chair for accommodating a person. Furthermore, a pressure device for applying local or point pressure to one or more pressure points on the human body is described, which can be used on the chair.

[0002] Chairs are conventionally designed to support the human body in a seated position, with the back against a backrest and the backs of the thighs resting on a seat, the torso and thighs forming an angle of slightly more or less than 90°. Frequent sitting leads to a shortening of the muscles in the front and back of the thighs, the front of the hips, and the calves, resulting in damage to the spine, hips, and knee joints. Pressure sores can also develop on the back of the thighs and buttocks, along with other undesirable effects.

[0003] To at least reduce the strain on the spine, it is known to use chairs whose backrests are connected to the seat by a narrower connecting piece in such a way that a person sits astride the chair and leans their stomach or chest against the backrest. Since this is also not comfortable in the long run, chairs have been developed that specifically allow such a astride position, either as the sole sitting position or as an alternative. For example, US 454,100 discloses a chair with a seat, two sloping thigh recesses, a central column rising obliquely between the thigh recesses, and an elbow support in the form of a crossbar attached to the upper end of the central column.From US 3,220,771 a sun deck chair is known with a tubular frame to which a seat approximately in the shape of a bicycle saddle is attached, wherein a section consisting of two parallel tubes connected at the outer end in a U-shape and pointing obliquely upwards from the seat at an angle of approximately 45° carries an armrest that can be moved along the parallel tubes.

[0004] From US patent 4,832,407 and EP 0 163 437 A1, an office chair is known whose backrest has a narrow upper section and a wider lower section that extends laterally in the form of wings. Both shapes allow for a conventional sitting posture as well as a straddle position, in which the sternum rests against the top of the backrest. In both sitting positions, the forearms or elbows can rest on the wings of the backrest. US patent 4,832,407 provides a shin support that allows the knees to rest in the straddle position. In EP 0 163 437 A1, the seat surface is cross-saddle-shaped, meaning that the center edges are slightly raised and the corners are sloping.

[0005] US patents 5,295,728 and 3,754,787 disclose work chairs or standing chairs in which the user sits on a saddle in a near-standing, slightly bent-over position and supports themselves against a chest support. Both the saddle and chest support are height-adjustable. The forearms are completely free.

[0006] Massage chairs are known from US patents 4,662,361 and 5,971,485, which have a seat, a chest support, a forehead or face support, and a forearm support, the latter also including a shin support. Similar kneeling chairs with a seat and a knee / shin support are also known, in which the seat is angled relatively sharply and the body weight is completely supported and balanced by the seat and the knee / shin support.

[0007] US Patent 6,287,243 B1 exemplifies a variety of different training benches in which a seat and a backrest are arranged to pivot relative to each other, allowing a person to position themselves on their back or stomach to perform various strength exercises. The backrest is typically wide enough to provide stable support for the back or chest, yet narrow enough to allow free movement of the arms alongside it. In the aforementioned patent, the seat and backrest pivot in a coupled motion relative to each other; however, designs are also known in which the seat and backrest pivot independently of each other relative to a base frame.

[0008] From DE 20 2009 005 763 U1, a prone recliner or short-sleep recliner is known in which both the lying and sitting surfaces are ergonomically adapted to the prone sleeper position, wherein the lying surface is at least slightly curved upwards and slopes down towards the long sides and becomes at least slightly narrower below the shoulder support and at the lowest part, and the seat surface meets the lying surface at the same width and can become wider again towards its end, so that the arms and legs can hang down, the head is supported and only the instep or shin rests on the floor, in order to enable a person to assume a position completely unusual in everyday life for a short time.

[0009] All the aforementioned pieces of furniture, which can generally be called chairs, have in common that in every possible position, especially those perceived as particularly "ergonomic," the hip joint is more or less flexed. A particular problem for people who sit a lot on conventional chairs is that the muscles in the front of the thighs and hips often shorten, placing undue strain on the spine. Similar adverse effects can also be observed in other trunk and leg muscles, such as the abdominal muscles, back muscles, hamstrings, and calf muscles.

[0010] Scientific literature shows that muscle lengthening returns to its pre-stretch state 15 minutes after stretching exercises are completed (e.g., Esposito F. et al., Time course of stretching-induced changes in mechanomyogram and force characteristics. J. Electromyography and Kinesology 2011, Vol. 21, pp. 795-802). Clinical experience suggests that applying pressure to the muscle insertion at the bone improves and sustains extensibility. This is explained by receptor-mediated feedback via the basal ganglia, leading to a decrease in centrally mediated muscular counter-tension. This is due to the biomechanical principle that muscle insertions at the bone exert tensile stress on the bone even at rest, and that there are never neutral or positive compressive stresses. Furthermore, it is known that tissue becomes hyperelastic when pressure is applied to these cells.Another publication describes how cells become extensible through prolonged pressure (Latorre et al., Active superelasticity in three-dimensional epithelia of controlled shape. Nature 2018, Vol 563, pp. 203-208. https: / / doi.org / 10.1038 / s41586-018-0671-4).

[0011] Applying pressure in the aforementioned sense can significantly prolong the after-effect of the stretching. This effect is used, for example, in osteopressure. Currently, this is predominantly applied manually by a therapist, sometimes with the aid of tools such as pressure points, rods, ball-tipped rods, balls, acupressure pins, etc. A disadvantage of this therapy method is the high personnel cost and the requirement to visit a therapist or have one come to the patient, as self-treatment is difficult or even impossible. Similar considerations apply to other manual therapies such as acupressure and massage.

[0012] WO 2013 / 003369 A2 describes a support system with a frame for supporting a person in a leaning position. The frame has a base from which a column extends upwards. An upper body section is mounted on the column and is height-adjustable via a sliding mechanism. An armrest, a chest support, and a thigh / seat support are each pivotally mounted on the upper body section around their own individual swivel joint. A shin / knee support is attached to the lower part of the column via another swivel joint. The support system can be converted into a sitting position by using the thigh / seat support as a seat, the chest support as a knee rest, and the shin / knee support as a footrest.

[0013] One object of the invention is to create a chair for accommodating a person, for example in a prone position or in a seated position, which is improved compared to the prior art with regard to a more favorable body posture.

[0014] One object of the invention is to create a chair for accommodating a person, for example in a prone position or in a seated position, which counteracts a shortening of the hip and / or leg muscles and / or abdominal muscles, in particular the hip flexor muscles, with associated tendons, ligaments and fascia.

[0015] Another object of the invention is to create a chair for receiving a person, for example in a prone position or in a seated position, which enables specific stretching positions of the hip and / or leg muscles and / or abdominal muscles, in particular without having to interrupt other activities carried out on the chair.

[0016] Another object of the invention is to create a chair for accommodating a person, for example in a prone position or in a seated position, which is improved compared to the prior art with regard to the variability of the seating positions.

[0017] Another object of the invention is to create a chair for accommodating a person, for example in a prone position or in a seated position, which is improved compared to the prior art with regard to adaptability to different body dimensions and shapes.

[0018] Another object of the invention is to create a chair that is convertible between a normal sitting posture on a normal chair, in particular an office chair, and a stretched posture that counteracts a shortening of the hip and / or leg muscles, in particular the hip flexor muscles, with associated tendons, ligaments and fascia.

[0019] Another object of the invention is to expand and facilitate the applicability of a manual application in the sense of osteopressure, acupressure or massage.

[0020] Another object of the invention is to enable manual application in the sense of osteopressure, acupressure or massage in self-therapy, in particular without having to interrupt other activities.

[0021] The problem is solved, at least in part, by the features of claim 1. Advantageous further developments and preferred embodiments are the subject of the dependent claims.

[0022] A chair according to the invention for accompanies a person comprising an upper body section with an upper body contact surface that is adapted or adaptable to at least parts of the front or back of a person sitting on the chair, and a lower body section with a lower body contact surface that is adapted or adaptable to at least parts of at least one front of the person's thigh, wherein the upper body section and the lower body section are arranged or can be arranged and fixed in a position relative to each other such that the upper body contact surface and the lower body contact surface cause a hyperextension of the person's hip joint with a predetermined hyperextension angle.

[0023] The chair according to the invention is designed to accommodate a person in a standing position, in particular a leaning position, so that the hyperextension posture is effected on the person in a standing position, in particular a leaning position, on the chair.

[0024] The hyperextension posture is achieved by limiting the angle of the upper body contact surface and the lower body contact surface to less than 180° in the hyperextension direction.

[0025] Furthermore, an adjustable hip support element is provided, designed to rest against the back of the person's hip and fixable in a position that prevents the person's hip from shifting. The hip support element may also be removable. It can be positioned, or be positioned and fixed in a way that prevents the person's hip from shifting away from the cutting line. The hip support element may, for example, be designed as a pressure bar, pressure roller, buttock support, seat shell, or saddle-like structure.

[0026] As explained at the outset, people who spend a lot of time sitting on conventional chairs often experience a problem: the muscles in the front of the thighs and hips tend to shorten, and the resulting strain places undue stress on the spine. The chair according to the invention is designed so that the upper and lower body support surfaces create a hyperextension angle of the hip joint. For example, the upper and lower body support surfaces can be angled at less than 180° in the hyperextension direction. In other words, the lower body support surface is inclined relative to a straight extension of the upper body support surface by an hyperextension angle in the direction of the person lying on the chair. The hyperextension angle is adjustable in steps or continuously. It is preferably at least a few degrees.The hyperextension angle can be at least 3°, in particular at least 5°, and preferably at least 7° or at least 10°. The angle can also be adjustable up to 90° or more, so that extension can still be achieved even with increasing hip joint mobility. It is not unlikely, especially in women, that this angle will be reached over time. On the other hand, it is advantageous if the chair is adjustable to allow flexion at the hip joint, as a person may not be able to achieve hyperextension, at least initially. The actual hyperextension angle achieved or set can therefore be adapted to individual circumstances, such as natural flexibility, fitness level, and / or training goal.

[0027] A person sitting in this chair has their thighs angled slightly backward at the hip joint, thus counteracting the shortening of the anterior thigh and hip muscles. Regular use of the chair according to the invention therefore counteracts the negative effects of sitting in a conventional chair. The person's posture improves. Regular use of the chair thus contributes to the person's well-being.

[0028] Additionally, the chair can be designed in such a way that the hyperextension posture is caused by a person lying on their stomach or astride the chair.

[0029] Furthermore, the chair can be designed in such a way that the hyperextension posture is caused by a person sitting on the chair, preferably with their back leaning back.

[0030] Furthermore, the chair can be designed in such a way that the hyperextension posture is caused by a person kneeling on the chair.

[0031] The chair can be designed in such a way that several or all of the aforementioned postures are possible, and can in particular be converted to allow for changing the posture.

[0032] Preferably, the chair is designed such that the upper body support surface, which is adapted to the front of the upper body, is inclined at an angle of at least 30°, particularly at least 40°, and preferably at least 45°, to the horizontal. This allows a person to sit or lie on the chair, particularly in a prone or forward-leaning position, and still perform certain activities, such as office work. The steeper the upper body support surface and the more the posture transitions into a standing / leaning position, the easier it is to perform usual tasks in the familiar manner. Therefore, inclinations of the upper body support surface of at least 60°, and particularly at least 70°, to the horizontal can also be advantageous. A certain backward tilt of the upper body is also conceivable.In any case, and especially in positions where the upper body is leaning forward against the upper body support section, the arms are free for any usual activity. The upper body support section can be suitably shaped for this purpose, for example, by having corresponding cutouts through which the arms can extend forward. In a practical embodiment, the upper body section can have a chest support and an abdominal support, with the chest support extending, for example, to almost 90° or even beyond, and the abdominal support, for example, between 60° and 70° or more.

[0033] The steeper the angle of the upper body support surface, the greater the need for a support element to keep the person on the chair securely in place and prevent them from slipping. Such support elements can be positioned in various ways. For example, this could be a footplate to support the feet from below, a knee support to support a bent knee from below, a hip support to support the hips or buttocks from a low / rear angle, and / or a saddle to support the person's crotch. A footplate can also be adjustable to allow for flexion and / or extension of the ankle joint, thus enabling a stretch of the calf muscles as well.

[0034] The hip support also ensures that a person sitting on the chair has their hips fixed to the chair, thus reliably maintaining the intended hyperextension of the hip joint. In particular, the hip support can be designed to press the hips towards the upper body's contact surface.

[0035] For the purposes of this invention, a chair is any device for receiving or supporting a human body in a sitting, lying, kneeling, squatting, or semi-standing, slightly leaning forward, or other position, regardless of whether such a device would be referred to as a chair in general or technical usage, or could or would be described differently (e.g., as a seat, stool, kneeling bench, armchair, lounger, support, frame, etc.). For the purposes of this invention, a prone position is a position in which the front of the upper body faces a contact surface of the chair.For the purposes of the invention, an upper body section is a section with a contact surface designed for the complete or partial reception or contact of an upper body front or upper body back, and a lower body section is a section with a contact surface designed for the complete or partial reception or contact of a lower body front, in particular the front of the thighs. The respective contact surfaces can be flat or curved, can be shaped to conform to a standard body contour, or can be designed to adapt to different body contours. For the purposes of the invention, hyperextension of the hip joint is understood to mean a position deflected posteriorly beyond that of an upright standing position.

[0036] In embodiments, the lower body section can have two leg sections, the central joint comprising two individual joints, each of which allows a leg section of the lower body section to pivot relative to the upper body section about a transverse axis, and each of which is lockable, in particular positive locking, and preferably each of which allows rotation about a longitudinal axis of the leg section and / or allows the leg sections to pivot about a sagittal axis. The individual joints can, for example, be designed as ball joints. The central joint can have a master pivot joint which, when the individual joints are locked, allows the entire lower body section to pivot relative to the upper body section, or vice versa, about the transverse axis, and which is lockable, in particular positive locking.

[0037] The upper body section can include a chest support for supporting at least part of the person's rib cage and an abdominal support for supporting at least part of the person's abdomen, wherein the chest support and the abdominal support are rigidly connected to each other or pivotably connected about a transverse axis by means of an intermediate joint. A rocker arm can be provided between the central joint and the upper intermediate joint. The rocker arm can be telescopic. Furthermore, the chest support and the abdominal support can pivot together relative to the rocker arm.

[0038] The lower body section as a whole, or the leg sections individually, may have a thigh support and a lower leg support, which are rigidly connected to each other or pivotally connected about a transverse axis via an intermediate joint. The thigh support may be attached to the central joint. The lower body section as a whole, or the leg sections individually, may also have a foot support designed to support one of the person's feet. This foot support is rigidly connected to the lower leg support or pivotally connected about a transverse, sagittal, and / or longitudinal axis via an end joint. The distance of such a foot support from the intermediate joint may be adjustable. Furthermore, the foot support may have a toe stop designed to hyperextend the toes. The distance of such a toe stop from the end joint may be adjustable.Furthermore, the footrest may have a heel stop and / or an instep support.

[0039] The chair may be equipped with one of the following elements: a footrest, which is arranged or can be arranged in the area of ​​the lower leg support and / or in the area of ​​the thigh support, in particular near the lower intermediate joint of the lower body section and / or below the central joint; a foot roller is provided, which is designed and arranged or can be arranged for hooking a foot in an angled position of a knee behind the person's hip, wherein the foot roller is preferably adjustable in its position; a knee support, which is designed and arranged or can be arranged for supporting a knee on the lower body section, wherein the knee support is preferably adjustable in its position; a back support, which is designed and arranged or can be arranged for supporting a back, wherein the back support is preferably adjustable in its position; a leg rest.which is designed and arranged, or can be arranged, for the horizontal placement of a person's leg in front of the body in an area in front of the hip, wherein the leg rest is preferably pivotable and / or telescopic and further preferably has an extension that is pivotably, in particular foldably, and / or telescopically connected to the thigh rest.

[0040] It is also conceivable that the chair has a base designed to support the chair on a floor surface, wherein preferably the upper body section and the lower body section as a unit are pivotable relative to the base about a transverse axis by means of a base pivot joint, wherein the base pivot joint is lockable, in particular lockable by positive locking, wherein further preferably the base allows pivoting about a vertical axis.

[0041] Likewise, a head module can be provided which holds the head of a person seated on the chair in the physiological position and guides it during movement, wherein preferably two pads or other anatomically shaped parts encompass the mastoid on both sides and pull it backwards and upwards, and a forehead support is provided as a counter-support, wherein preferably the head module enables forward, backward and / or sideways movement of the head by means of a spring or hydraulic mechanism or similar, and in particular allows rotation that approximately corresponds to the axis of the dens axis via a rail sliding mechanism.

[0042] The lower body section as a whole, or two separately pivotable leg sections of the lower body section, can each individually have a thigh support with a thigh pad, which is formed above and ends above the kneecap of the person who is in a standing position in the chair.

[0043] The lower body section can have a footrest which supports one foot of a person lying prone on the chair, wherein the footrest is preferably articulated and adjustable and / or fixable in a position which causes the foot to be extended, wherein the footrest is preferably spring-loaded in at least one joint direction.

[0044] In various configurations, the chair may be convertible or adjustable into a seated position designed to accommodate a person in a seated position. It may be provided that, in this seated position, the lower body section serves at least partially as a seat surface and the upper body section serves at least partially as a backrest, in particular a back support.

[0045] The chair can be designed to accommodate a person in a seated position, with a seat surface divided into a first partial seat surface and a second partial seat surface, wherein the second partial seat surface is inclined or tiltable at an angle to the first partial seat surface such that, when a person sits with the back of one thigh on the first partial seat surface and the front of the thigh against the second partial seat surface, the first partial seat surface and the second partial seat surface cause a hyperextension of the person's hip joint with a predetermined hyperextension angle.

[0046] The chair can be designed, converted, or adjustable as one of: Office chair, reclining chair, armchair or lounger, kneeling chair, stool or bench, seat stool or frame, standing stool or frame, work chair or frame, treatment chair or couch, training chair or bench.

[0047] Furthermore, the chair in the seated position can meet the requirements for an office chair according to at least one industry or trade standard, wherein the at least one industry or trade standard includes in particular DIN EN 1335-1, DIN EN 1335-2 and / or DIN EN 1335-3, in the 2002 version and / or in the 2018 version, wherein the chair preferably comprises type C of this standard, alternatively type B or alternatively type A.

[0048] Further described, but not claimed independently, is a chair for accommodating a person, designed as a step stool, which is shaped with a saddle-roof-shaped seat in such a way that one can sit on it step by step, so that one sits on one half of the step stool with the underside of one thigh and on the other side with the top of the other thigh.

[0049] A pressure device for use on the human body is described, but not claimed independently. It is designed for attachment to, or in conjunction with, a chair and comprises one or more pressure units, each with at least one pressure head designed to exert local or point pressure at a predetermined pressure point on the body of a person seated on the chair. Examples of such pressure points are given in the detailed description below. Such a pressure device can expand or facilitate the applicability of manual applications such as osteopressure, acupressure, or massage, and enable self-therapy.By connecting such a pressure device to a chair described above, which causes the stretching of specific muscles or muscle groups, a particularly advantageous effect can be achieved in terms of the efficiency of the stretching effect achieved with such a chair. Since the positioning of the pressure elements relative to the body of a person sitting on the chair is predetermined by its attachment to or connection with the chair, the application is simple and safe. A person sitting on the chair can continue to perform other tasks. The position of the pressure elements can be particularly advantageous if it is adjustable. A control system can further facilitate and simplify the application, making it safer and more reliable.

[0050] Another embodiment of the invention relates to a chair, particularly as described above, which has such a pressure device attached to it or fixedly or detachably connected to it. The pressure device can have one or more pressure units, each with at least one pressure head designed to exert local or point pressure at a predetermined pressure point on the body of a person seated on the chair. At least one of the one or more pressure units can be adjustable in location and / or in pressure direction and / or in pressure intensity, and / or have an interchangeable printhead, and / or be designed to exert a delivery movement, vibration, pulsation, rotation, rolling or kneading or to impart electrical charges, magnetic or electromagnetic fields, heat or cold, and / or be adjustable in pressure intensity, preferably via a spring mechanism or a hydraulic, pneumatic or motor drive, and / or have a force sensor that outputs a signal corresponding to a force exerted by the pressure unit.

[0051] The printhead can have a base with which it is integrally formed, permanently attached, or replaceably connected, and which preferably has a round, oval, conical, or elongated shape. The printhead can also be rounded or pointed at an end closer to the user. The printhead can have a medium-hard to medium-firm material, preferably foamed polypropylene, hard plastic, soft plastic, or rubber, at least on its surface.

[0052] Several pressure units can be combined into a pressure module. A control unit can be provided for controlling at least one of the one or more pressure units, preferably by receiving and processing a signal received from a sensor of the pressure unit, corresponding to a force exerted by the pressure unit, and furthermore preferably based on a manually specified pressure value or one determined by an algorithm. A control unit for controlling at least one of the one or more pressure units and an emergency stop function, which can be activated by a person subjected to the pressure device, can also be provided.

[0053] A further described, but not independently claimed, attachment element for a chair is one that has a thigh support surface and can be attached to a chair in such a way that the thigh support surface is arranged laterally to a seat surface of the chair and is inclined or tiltable at an angle to the seat surface such that, when a person sits with the back of one thigh on the seat surface and the front of the thigh rests against the thigh support surface of the attachment element, the seat surface and the thigh support surface cause a hyperextension of the person's hip joint with a predetermined hyperextension angle.

[0054] Selected embodiments of the present invention are described in detail below with reference to the accompanying drawings. The drawings show: Figure 1 shows a chair (basic form) according to an embodiment of the present invention in a side view; Figure 2 shows the chair of Fig. 1 in a supervisory view along a line "II-II" in Fig. 1 without a base; Figure 3 the chair of Fig. 1 in a practical application; Figure 4 the chair of Fig. 1 in another practical application; Figure 5 the chair of Fig. 1 in another practical application; Figure 6 the chair of Fig. 1 in another practical application; Figure 7 the chair of Fig. 1 in another practical application; Figure 8 the chair of Fig. 1 in another practical application; Figures 9, 10, the chair of Fig. 1 in a different position and practical application; Figures 11, 12 the chair of Fig. 1 in a different position and practical application; Figure 13 a chair (variant 1) according to a further embodiment of the present invention with non-adjustable elements of a lower body part in a view accordingly Fig. 2 Figure 14 shows a chair with partially drawn pressure elements according to a further embodiment of the present invention in a view corresponding to Fig. 2 Figure 15: a cuff of the chair Fig. 14 in a cross-sectional view; Figure 16 a head module for attachment to the chair in a side view; Figure 17 the head module of Fig. 16 in a front view; Figure 18 a modified footrest of the chair from Fig. 1 Figure 19 shows a chair (variant 2) according to a further embodiment of the present invention in a side view in a first position; Figure 20 shows the chair of Fig. 19 in a second position; Figure 21 a chair of Fig. 19 According to a further embodiment of the present invention in a rear view with continuous abdominal support; Figure 22 a chair of Fig. 19 According to a further embodiment of the present invention in a rear view with a waisted abdominal support; Figure 23 the chair of Fig. 19 in a practical application in a normal sitting position; Figure 24 the chair of Fig. 19 in another practical application; Figure 25 a chair according to a further embodiment of the present invention in a front view in a position with rotations and spreading; Figure 26 a chair according to a further embodiment of the present invention in a front view in a position with rotations, spreading and torsions; Figure 27 a chair (variant 3) according to a further embodiment of the present invention in the form of a kneeling bench in a side view; Figure 28 a chair (variant 4) according to a further embodiment of the present invention in a side view with a thigh support / seat that folds down to the rear; Figure 29 the chair of Fig. 1 in another position or practical application; Figure 30 a chair (variant 5) according to a further embodiment of the present invention in the form of a saddle stool in a side view; Figure 31 a chair (variant 6) with a pivoting backrest and a downward-folding seat / thigh support according to a further embodiment of the present invention in a side view in a first position; Figure 32 the chair (variant 6) of Fig. 31 in a second position; Figure 33 the chair (variant 6) of Fig. 31 in a third position; Figures 34A - 34E an armrest for a chair according to a further embodiment of the present invention; Figure 35 a chair according to Fig. 1 with a variant of the base according to a further embodiment of the present invention; Figure 36 the chair according to Fig. 1 with a variant of the base and folded leg rest and headrest according to a further embodiment of the present invention; Figure 37 a folding mechanism for increasing the stability of a chair according to a further embodiment of the present invention; Figure 38 an example of a pressure element with a spring mechanism, which serves for length and pressure intensity adjustment and is foldable, according to a further embodiment of the present invention; Figure 39 a chair according to a further embodiment of the present invention in a side view as a stand variant; Figure 40 a chair according to a further embodiment of the present invention in a side view as a table-mounted variant; Figures 41A-41 a shoulder module for a chair according to a further embodiment of the present invention, which in various forms pushes the shoulder backward, thereby allowing free movement of the arm;Figures 42A-42C: a backrest for the chair according to a further embodiment of the invention, shown in side, front, and top views; Figures 43A, 43: legs of a chair according to a further embodiment of the present invention as an attachment variant to a normal chair / office chair in front and side views; Figure 44: a chair according to a further embodiment of the present invention as a chair attachment variant with anti-tip device; Figure 45: the chair made of; Fig. 14 with pressure elements shown in detail; Figure 46 a thoracic spine support with pressure elements; Figures 47A, 47 leg chair according to a further embodiment of the present invention as a step stool in side view and front view; Figure 47C a chair according to Fig. 47B with a split saddle surface; Figure 48A a human body from the front (ventral) with pressure points indicated; Figure 48B legs a human body from the back (dorsal) with pressure points indicated; Figure 48C pressure points on a left anterior superior iliac spine at the anterior pelvis; Figure 48D pressure points on the sternum and xiphoid; Figures 49 to 52 another embodiment of the chair in different perspective views, and Figures 53 to 56 an attachment with a crossbar of the in the Figuren 49 bis 52 The illustrated embodiment is shown in different views.

[0055] All drawings are to be understood schematically. Directional and positional terms are used according to standard anatomical terminology and, unless otherwise specified, refer to a body positioned prone on the chair. A longitudinal direction is generally understood to be a direction running along the extended spine or between the atlas and sacrum of the body positioned prone on the chair according to the invention. However, a longitudinal direction can also be understood, as a local directional indication, as a direction approximately passing through line II-II in Fig. 1 in the plane of the drawing. A transverse direction is understood to be a direction that runs through both hip joints or both shoulder joints of the body lying prone on the chair according to the invention and is perpendicular to the plane of the drawing. Fig. 1 The sagittal direction is understood to be a direction that runs perpendicular to the longitudinal and transverse directions, i.e., perpendicular to line II-II in the drawing plane. Fig. 1 or perpendicular to the drawing plane in Fig. 2 A sagittal plane is understood to be a plane that runs in a longitudinal sagittal direction and is parallel to or in the drawing plane. Fig. 1 A medial plane is a sagittal plane that runs exactly along the midline of the body. A frontal plane is understood to be a plane that runs in a longitudinal-transverse direction and is parallel to or in the plane of the drawing. Fig. 2 lies.

[0056] A chair according to an embodiment of the invention has an upper body section 1 and a lower body section 2 as well as a base 4 ( Fign. 1 und 2 The upper body section 1 and the lower body section 2 are designed to form respective contact surfaces that are at least partially adapted to the upper body of a person, at least in the area of ​​the front of the torso, and to the lower body, at least in the area of ​​the front of the thighs. The upper body section 1 and the lower body section 2 are connected to each other via a central joint 3. The assembly consisting of the upper body section 1 and the lower body section 2 is articulated to the base 4 via a base pivot joint 5.

[0057] The upper body section 1 has a chest support 6 and an abdominal support 7, which are connected to each other via an intermediate joint 8, referred to below, for the sake of distinction, as the upper intermediate joint 8. The chest support 6 has a sternal strut or sternal bearing 31 and two side wings 32. The chest support 6 can be one-piece or two-piece, or consist of or have several connected pressure pads. The sternal bearing / strut 31 is designed to rest against or bridge a sternum of the person lying prone on the chair and is comparatively narrow and / or set back in the axis to avoid uncomfortable pressure on the inner areas of the pectoralis major muscles or the breasts of females, and pressure points from clothing such as buttons or bra underwires.The side wings 32 extend slightly obliquely upwards from an upper region of the sternal support 31 to provide the broadest possible lateral support for the upper rib cage of the person below the clavicle. The side wings 32 are also designed to circumvent the breasts of a female person, i.e., to be positioned above them, and their width ends approximately in front of the person's acromioclavicular joint, so that shoulder movement remains unrestricted. The abdominal support 7 has a rib cup 33 and an abdominal section 34. The rib cup 33 is designed and shaped to cradle the lower rib cage of the person. The rib cup is thin so that a leg can be positioned behind it, but it can also be reinforced to attach an armrest.The abdominal region 34 extends downwards from a lower end of the rib cage 33 and is designed and shaped to fit against the abdomen of the person. The abdominal region 34 is narrower than the rib cage 33, so that the legs can also be moved in front of the body (cf. ). Fig. 3, 4 , 12 ). All parts can be multi-part.

[0058] A rocker arm 9 connects the upper intermediate joint 8 to the central joint 3 ( Fign. 1, 2 In this embodiment, the swing arm 9 is essentially rigid, but may possess a certain degree of inherent elasticity or a spring mechanism. This elasticity should be sufficiently stiff to provide adequate support for the upper body section 1 to hold the person. Depending on the person's size and weight, a different degree of elasticity may therefore be advantageous.

[0059] Optionally, the rocker arm 9 can be telescopically adjustable to accommodate different torso lengths, and the abdominal support can also be moved and fixed relative to the rocker arm. The upper intermediate joint 8 allows the chest support 6 and the abdominal support 7 to pivot relative to each other in the medial plane (i.e., around a transverse axis) to adapt to the individual contours of the chest and abdomen. It can also be tilted and rotated to stretch the lateral muscles, ligaments, and fascia and / or to assume favorable positions for activities performed on the chair. The upper intermediate joint 8 is lockable in this direction of movement, effectively fixing a set pivot position between the chest support 6 and the abdominal support 7. The upper intermediate joint 8 can also be omitted.

[0060] Optionally, the upper intermediate joint 8 can be designed such that the chest support 6 and the abdominal support 7 can pivot as a unit relative to the rocker arm 9 in one, two, or three axes to improve upper body mobility during activities performed by a single person. With regard to this type of movement, the upper intermediate joint 8 can be lockable or freely movable. To prevent extreme positions and accidents, a limit to the range of motion can be provided. Optionally, elastic and / or damping components can also be provided. For example, the upper intermediate joint 8 can have a rubber / plastic or spring element that allows limited elastic movement of the chest support 6 and / or the abdominal support 7 and / or both together, returning to a neutral position when unloaded.Alternatively, a spring-loaded lever mechanism can be provided for this purpose.

[0061] The breast support 6 can also be designed so that the side wings 32 follow the movement.

[0062] Due to the special design of the chest support 6 and the abdominal support 7, as well as their mobility relative to each other, the upper body section 1 can be variably adapted to the contour of the upper body of the person lying prone on the chair, allowing the person to assume a comfortable position. Muscles and breasts are not compressed, and shoulders and arms are freely movable.

[0063] Optionally, an armrest may be provided, which allows one or both arms to be comfortably placed in front of the upper body, but does not further restrict mobility (not shown in detail).

[0064] Such an armrest can be attached to the side wings 32 or laterally on both sides or on one side to the rib shell 33 (not shown in detail).

[0065] Optionally, the armrest can be folded down to the footrest (22, described in more detail below) via a mechanism. For this purpose, the armrest can be attached to or near the central joint 3 or to the thigh support.

[0066] The upper body section 1 and the lower body section 2 can be pivoted relative to each other at least in a sagittal plane (i.e., about a transverse axis) via the central joint 3. In principle, it may be sufficient if the lower body section 2 can be pivoted as a whole relative to the upper body section 1. In the present embodiment, the lower body section 2 has two separate leg sections 10, and accordingly, the central joint 3 has two separate individual joints 30, which are attached laterally to the rocker arm 9 and each assigned to a leg section 10, allowing the respective leg section 10 to be pivoted individually relative to the upper body section 1. In this embodiment, the rocker arm 9 extends beyond the central joint 3 further into the area of ​​the lower body section 2 and carries the base pivot joint 5 at its lower end for connection to the base 3. The base 4 is in Fig. 2 Cut away to improve the clarity of the drawing.

[0067] As an alternative to the connection of the central joint 3 to the swing arm 9 described above, a possibly reinforced central frame (not shown in detail) can also be provided, which supports the central joint 3 and / or the base pivot joint 5.

[0068] The position of the central joint 3, as well as the linkage of the base pivot joint 5, can be implemented in any conceivable way. As an alternative to the form described above, it would also be conceivable to position the central joint 30 opposite the representation in Fig. 2 to move upwards, as can be seen, for example, in the side views in Fign. 3-8 , 11, 12 The constructive design of the connection of swing arm 9, central joint 3 (with individual joints 30) and base pivot joint 4, insofar as provided, can also be implemented in any conceivable form.

[0069] Each individual joint 30 is designed to allow pivoting and / or rotation of the entire leg section relative to the upper body section 1. The individual joint 30 allows at least one pivoting motion in a sagittal plane (i.e., about a transverse axis) to define a flexion or extension angle of the person's hip joint. Optionally, the individual joint 30 can additionally allow pivoting motion in a frontal plane (i.e., about a sagittal axis) to define an abduction angle of the leg sections 10. Furthermore, torsion (i.e., rotation about a longitudinal axis of the respective leg section 10) can be provided to define an external or internal rotation of the leg sections 10. The respective degrees of freedom can be integrated by individual partial joints (e.g., hinges, axes, ball-and-socket joints) or implemented in series or as a combination joint (e.g., a ball and socket joint).This allows the central joint 3 to optionally enable up to three directions of movement (rotation directions) via the individual joints 30 (see also . Fign. 25, 26 ). The central joint 3 or each of its individual joints 30, possibly in partial joints, is designed to be lockable, i.e., fixed in a set position.

[0070] Optionally, the central joint 3 can have, in addition to the individual joints 30, an additional overall pivot joint (not shown) that allows the lower body section 2 to pivot as a unit with the leg sections 10 fixed in their respective pivot positions relative to the upper body section 1. In this case, it is advantageous if the overall pivot joint is arranged close to or in a line connecting the individual joints. Such an overall pivot joint can also optionally be designed for rotation about other axes in addition to pivoting about the horizontal axis, in order to allow, for example, torsion and / or lateral tilting in the lower spine. The overall pivot joint and the individual joints can have a common transverse pivot axis or different transverse pivot axes, at least with respect to one pivot direction of the overall pivot joint.

[0071] Each leg section 10 of the lower body section 2 has a thigh support 11 and a lower leg support 12. The thigh support 11 and the lower leg support 12 are connected to each other via an intermediate joint 13, which is referred to below as the lower intermediate joint 13. In variations described below, the leg sections 10 can be connected to each other, and the thigh support 11 and the lower leg support 12 can be connected to each other, or all parts can be fixedly connected to each other. Furthermore, each leg section 10 has a foot support 14, which is connected to the lower leg support 12 via an end joint 15. The foot support 14 can be pushed upwards by a spring or other device on the toe side. The foot support 14 can be tiltable, rotatable, and pivotable.

[0072] More precisely, the thigh support 11 comprises a thigh support 16 and a thigh pad 17. The thigh pad 17 may have a support plate with padding attached to it (not shown in detail) and is fixed to the thigh support 16, or in variations, possibly also slidably and lockably. The thigh support 16 is articulated to the rocker arm 9 of the upper body section 2 via the corresponding single joint 30. With the measures described above, the lower body section is adapted for contact with the front of the thigh. It should be noted that some of these measures can also be omitted.

[0073] The lower leg support 12 also includes a lower leg support 18 and a lower leg pad 19. The lower leg pad 19 may have a support plate with padding attached to it (not shown in detail) and is fixed to the lower leg support 16, or in variations, possibly also slidably and fixably. The lower leg support 16 is articulated to the thigh support 16 of the corresponding thigh section 11 via the lower intermediate joint 13.

[0074] In this embodiment, the lower intermediate joints 13 and the end joints 15 are purely pivot joints, allowing only pivoting about a transverse axis. The lower intermediate joints 13 and the end joints 15 are lockable. Optionally, the thigh limb 16 and / or the lower leg limb 18 are telescopically extendable. Furthermore, the intermediate joints 13 and / or the end joints 15 can optionally allow additional degrees of freedom.

[0075] A hip support element 20 is arranged at a distance from the central joint 3 via a bracket or other strut (not shown). The hip support element 20 serves to support the hip of a person lying prone on the chair at a predetermined distance from the central joint 3, thus preventing the hip from shifting away from the central joint 3. The hip support element 20 can be shaped like a shell or saddle to resemble the contour of a person's buttocks, or it can be designed as a simple roller or beam, or even more simply as a strap or band. The hip support element 20 can include a coccyx recess and pressure elements (su). The distance of the hip support element 20 from the central joint 3 is adjustable and lockable. Optionally, the longitudinal position of the hip support element 20 can also be adjusted and locked.In further optional variations, the hip support element 20 can also be designed to be removable. Furthermore, in other optional variations, the hip support element 20 can be reversed to serve as a headrest for a normal sitting position (see . Fig. 10 ). In the latter case, the hip support element 20 can advantageously have a padded back. The hip support element 20 can optionally also be designed to fold out from under a seat surface, or to pivot down from the side, or from the front or rear portion of the seat surface, or from under the abdominal section, or with a large lateral bracket from the head section. The hip support element 20 can be attached laterally (i.e., outside next to a leg section 10) or centrally (i.e., between the leg sections 10). If the upper body section 1 and the lower body section 2 each form support surfaces that hold an upper and lower body of a person in a prone position such that one of the person's hip joints is hyperextended, the hip support element 20 ensures that the person's hip joint is held in this hyperextended position (cf. Fign. 3, 4 , 5, 6 , 7 , 12This fact will become even clearer through the following description of specific applications.

[0076] A foot roller 22 is arranged via a bracket or other strut element (not shown) at a distance from the central joint 3, located behind the hip support element 20. The foot roller 22 allows a person lying prone on the chair to bend one or both legs and hook their foot behind their buttocks, and is optionally adjustable to accommodate increasing stretching (see Figure 2). Fign. 6 , 7 ). To support this position, especially when both legs are bent, a knee support 61 ( Fig. 6 ) is provided, on which a person's knee can rest. Optionally, the distance of the foot caster 22 from the central joint 3 is adjustable and lockable. Optionally, the longitudinal position of the foot caster 22 is also adjustable and lockable. The foot caster 22 can extend across the entire width of the chair, so that it can be used for either foot. Alternatively, two foot casters 22 can be provided, one for each side. The foot caster 22 can be attached laterally or centrally (i.e., between the leg sections 10). The foot caster 22 is optional and can also be omitted and / or made removable. In variations, the foot caster 22 can be swung out from an optional armrest by means of a swivel mechanism or created from it by means of a folding / swivel / sliding mechanism. Furthermore, in other optional variations, the foot caster 22 can be reversed to serve as a headrest for a normal sitting position (see ). Fig. 10 The foot roller 22 can optionally be designed to fold out from under a seat surface, or to be swung down from the side, from the front or rear part of the seat surface, from under the abdominal section, or with a large lateral bracket from the head section.

[0077] A back support 23 is arranged via a bracket or other strut element (not shown in detail) at a distance from the upper body section 1, above the hip support element 20 ( Fig. 1 The back support 23 serves to provide support for the back of a person lying prone on the chair (see below). Fig. 8 The distance of the back support 23 from the upper body section 1 is optionally adjustable and lockable. The longitudinal position of the back support 23 is also optionally adjustable and lockable. Furthermore, the back support 23 is optionally movable about a transverse axis. The angle of movement about the transverse axis can be limited and / or adjusted and lockable. The back support 23 can be attached laterally or centrally (i.e., extending from between the leg sections 10 and guided behind the hip support element 20). The back support 23 is optional and can also be omitted and / or designed to be removable.

[0078] A knee support 24 is attached to the lower leg support 18 above the lower leg pad 19, and a footrest 25 is attached to the thigh support 16 below the central joint 3 or below the leg rest 26 ( Fign. 1, 2 Each side of the chair can be equipped with a knee rest 24 and a footrest 25. The knee rest 24 serves to support one of the person's knees and is foldable (in Fign. 1, 2 (and in other figures, the knee rest 24 is shown folded into a non-functional position). The footrest 25 serves to rest one of the person's feet and allows them to stand unilaterally while maintaining the basic prone position (cf. Fig. 4 ) or bilaterally (cf. Fig. 8 ) to at least temporarily release the hyperextension of the hips and instead assume a flexed hip position with a more or less pronounced stretch of the gluteal and back muscles, especially the gluteal muscles. With both feet supported on the upper footrests 25, a squatting position is assumed, which can be effectively stabilized by the back support 23 described above (see above). Fig. 8 The knee rest 24 and the footrest 25 can each be height-adjustable and lockable. They are optional and can also be omitted and / or made removable.

[0079] A further variation in the application possibilities of the chair is achieved by a leg rest 26, which is attached above the upper footrest in the area of ​​the central joint 3 via a bracket or other strut part (not shown in detail) ( Fign. 1, 2 The leg rest 26 can be adjusted and locked in terms of tilt, rotation, and swivel. Optionally, the leg rest can also be telescopically adjustable and locked in its distance from the central joint 3. The leg rest 26 serves to elevate one of the person's legs with the knee bent and is generally positioned horizontally when in use (see figure). Fign. 3 , 12The leg rest 26 is usually designed to fold up against the upper body section 1. The leg rest 26 is optional and can also be omitted and / or be removable.

[0080] A shelf extension 27 is provided as an extension of the leg rest 26 and attached to it ( Fign. 1, 2 The leg rest can be attached to the leg rest 26 or hinged to it via a joint (not shown) so that it can be folded. It can optionally be telescopic and / or height-adjustable and / or swiveling and / or removable. One position of the leg rest extension 27 can be adjustable and fixed. The leg rest extension 27 serves to elevate one of the person's legs with the knee extended (see figure). Fig. 5 ). To fix the position of the leg, a hold-down device 51 can be provided, which offers support to the thigh above the knee to prevent it from moving away from the leg rest 26 ( Fig. 5 The distance between the hold-down device 51 and the leg rest 26 can be adjusted and fixed. The leg rest extension 27 is optional and can also be omitted and / or made removable. Likewise, the hold-down device 51 is optional and can also be omitted and / or made removable. Optionally, the foot caster 22 can be designed to function as a hold-down device 51 and / or be usable as such, or the hold-down device 51 can be designed to function as a foot caster 22 and / or be usable as such.

[0081] The chair's base 4 comprises a base frame 36, a sleeve 37, and a gas cylinder 38. The base frame 36 is designed for placement on a floor and is in the form of a pentagon, a plate, a frame, or another suitable shape. The base frame 36 supports the sleeve 37, in which the gas cylinder 38 is rigidly mounted. The gas cylinder 38 points vertically upwards and carries a piston 39 on a gas cushion. The piston 39 terminates in the base pivot joint 5. The piston 39 is rotatably mounted in the cylinder 38. The chair's height can also be adjusted via the piston 39 and the cylinder 38. The base pivot joint 5 and the central joint 3 can be attached to a common support (not shown in detail). The support can be a sheet metal part, a tube, or other frame or node.

[0082] The base 4 can also take on any other conceivable form. Further examples are given in the following. Fign. 35-37 The following are shown. Further below, embodiments are also described in which the chair according to the invention is designed as a screw-on version that can be mounted on another chair, a table, or another object, or with other base solutions. Instead of the five-pronged base shown, another multi-pronged variant, a frame, or a plate could be provided. The base 4 can have casters, as is common with office chairs. Such casters can optionally be lockable. The cylinder 38 can be released and locked via a lever mechanism, as is common practice with office chairs. A hydraulic or pneumatic drive for the cylinder 38 can also be provided. Furthermore, a motor drive can also be provided. This allows the base 4 to be extended and retracted without the person having to support themselves on the floor or the base frame 36.Another option involves stepless or continuous height adjustment of the entire base with a locking or stop mechanism. In a simple form, such an option can be implemented by a stand tube with radial detents distributed along its length and locking pins that can selectively engage in the detents and against which a sleeve tube, which carries the cylinder 38, can be supported. As a further option, the base pivot joint 5 can be designed as a parallel link arrangement. In this case, height adjustment of the base via the parallel link arrangement can be coupled with a pivoting of the thigh support 16. The chair according to the invention is also conceivable in the form of a fixed frame. Height adjustment is not necessarily required in every case. Furthermore, the base 4 can optionally be secured against slippage or locked in place (manually or automatically when the chair is unfolded into the prone position).

[0083] As already indicated above, the upper body section 1 and the lower body section 2 each form support surfaces that hold the upper and lower body of a person in a prone position in such a way that the person's hip joint is hyperextended. The hip support element 20 ensures that the person's hip joint is held in this hyperextended position. In this embodiment, the upper rib cage (i.e., the sternum and above it) rests against the chest support 6, the lower rib cage and abdomen rest against the abdominal support 7, one thigh rests against the thigh pad 17, and the buttocks rest against the hip support element 20, which is held at a distance such that the hip assumes precisely the desired hyperextension position (see Figure 20). Fign. 3, 4 , 5, 6 , 7 , 12This gently stretches the hip flexor muscles, tendons, ligaments, and fascia, thus counteracting the shortening of these tissues. The degree of stretch can be adjusted via the central joint 3 and, if necessary, increased gradually or continuously depending on flexibility. Lying prone on the convex abdominal support also stretches the back muscles. The chest support allows for further stretching of the abdominal muscles, relieving pressure on the upper back.

[0084] The chair according to this embodiment allows for a variety of positions. In the basic position, which is not specifically shown in the drawing, both thighs rest against the thigh pads 17, both lower legs rest against the lower leg pads 19, and both feet rest on the footrests 14. The lower leg support is not strictly necessary in a relatively upright position. However, the lower leg support prevents slippage when the angle of the lower leg support to the horizontal is already small.

[0085] In another practical application, one leg can be released from the hyperextended position and placed bent in front of the body on the leg rest 26 ( Fig. 3 In addition to the muscles described, the abductor and internal rotator muscles, along with their associated tendons, ligaments, and fascia, can also be stretched.

[0086] The stretch can be increased even further by increasing the overextension angle of the chair even more ( Fign. 11, 12 )

[0087] In another practical application, one leg can be released from the hyperextended position and placed in front of the body on footrest 25 ( Fig. 4 ). This can also stretch the hip and knee extensor muscles along with their associated tendons, ligaments and fascia.

[0088] In another practical application, a leg can be released from the hyperextended position and placed extended in front of the body on the leg rest 26 and the rest extension 27 ( Fig. 5 This also allows the hip extensor and knee flexor muscles, along with their associated tendons, ligaments, and fascia, to be stretched. The leg support 51 helps to keep the leg extended. The leg can also be placed on the leg rest 26 without the extension 27, with the knee bent and the lower leg hanging.

[0089] In another practical application, a foot can be taken from the footrest 14 and hooked behind the body into the foot roller 22 ( Fig. 7 ). In this process, the hip extensor muscles remain hyperextended, and the knee extensor muscles, along with their associated tendons, ligaments, and fascia, can also be stretched.

[0090] In another practical application, both legs can be released from the hyperextended position and placed in front of the body on the lower footrest 24 or (preferably) the upper footrest 25 ( Fig. 8 ). As with the one-legged variant (see below). Fig. 4 The hip and knee extensor muscles, along with their associated tendons, ligaments, and fascia, can also be stretched. Additionally, the back muscles can be gently stretched, relieving pressure on the lumbar spine. The back support 23 helps stabilize this position.

[0091] In another practical application, both feet can be taken from the footrest 14 and hooked into the foot roller 22 behind the body ( Fig. 6 The hip extensor muscles remain hyperextended, and the knee extensor muscles, along with their associated tendons, ligaments, and fascia, can also be stretched. Simultaneously, the feet can be relieved of pressure, and blood pooling in the feet can be prevented or reduced. Adjusting the position of the foot roller 22 (directional arrow 62) can help find a comfortable and / or particularly effective position. Knee supports 24, which are attached to the lower leg support 18 and are located in Fig. 6 Figures shown folded into the functional position can help to stabilize this position.

[0092] Due to the central joint 3 and the lower intermediate joint 13, the chair can also offer a seated position in another practical application ( Fign. 9, 10 In this process, both the central joint 3 and the intermediate joint 13 are brought into an approximately right-angled, opposite position, and the thigh support 11 is brought into an approximately horizontal position by means of the base pivot joint 5. The lower leg support 12 can be pivoted backwards under the thigh support 11 to allow legroom; for this purpose, the lower leg support 12 can be equipped with one or more joints. Switchable air cushions (not shown) in the chest support 6 and the abdominal support 7 can help to adapt the support surface to the contours of the person's back. It should be noted that in this illustrated position, the chair according to the invention can be dimensioned and designed in such a way that it meets the requirements for an office chair. The requirements for an office chair are defined in various industry or trade standards.Currently, for example, DIN EN 1335-1, DIN EN 1335-2 and / or DIN EN 1335-3, in the 2002 and / or 2018 versions, are applicable. The chair can preferably be designed according to type C of this standard, alternatively type B or alternatively type A.

[0093] In a further embodiment of the present invention according to Fig. 13 The chair, as before, has an upper body section 1 and a lower body section 2, which are connected to each other by a central joint 3, and is otherwise constructed in the same way as the one described below, with the exception of the deviations described below. Fign 1, 2 The chair shown. In contrast, the lower body section 2 is a single piece, i.e., it is not divided into two leg sections and also has no intermediate joints. Accordingly, the lower body section 2 has a single frame 131 to which two thigh pads 17 and two lower leg pads 19 are attached, as well as a single footrest 14 for both feet via a single end joint 15. The central joint 3 provides only a single pivot direction in the transverse direction. This embodiment is significantly simpler in construction than the previous one, is therefore less expensive to manufacture, and yet still performs the central function of controlled hip hyperextension in the prone position.

[0094] An optional addition, which is also an independent aspect of the invention, is realized by a pressure device that is located in Fig. 14 as an extension of the first embodiment according to Fig. 1 This is illustrated. The pressure device has pressure units 141 which are attached to selected points on the chair and which are designed and configured to exert pressure on the person's body at specific pressure points. The respective pressure units 141 can be attached to the chair individually, separately, or in groups (modules), or can be detachably or permanently connected to it.

[0095] As described at the beginning, the extensibility of a muscle can be improved by applying strong pressure to its origin or insertion for an extended period. The pressure units 141 are designed for this purpose. The pressure units 141 can be variably adjusted in location, direction, and intensity, and the pressure head can be interchangeable.

[0096] The pressure units 141 can be designed as follows, for example: round, oval, conical or elongated base (e.g. base 382, Fig. 38 ), which have a printhead (e.g. printhead 381) at the end closest to the body. Fig. 38 ) exhibits; the printhead can be predominantly round, but also pointed; the printhead can be formed as one piece with the base, permanently connected or interchangeably connected; The printhead can have a material with medium to medium-firm (not soft) properties, at least on its surface, e.g., (expanded) polypropylene like a fascia roller (BlackRoll). ® ) but also hard and soft plastics or rubber. Other suitable materials include particle foams made of expanded polypropylene (ePP), expanded thermoplastic polyurethane (eTPU), expanded polylactic acid (ePLA), expanded polyethylene (ePE), expanded polyethylene block amide (ePEBA), or polyethylene terephthalate (ePET). The hardness and elasticity can be adjusted by mixing these materials.

[0097] Fig. 38 Figure 1 shows an optional variant of a pressure element 140 with an adjustable spring mechanism 383 for pressure regulation and a folding mechanism 386. The print head 381 is slidably arranged on the base 382 of the pressure element 140. Optionally, a detent or similar feature can be provided to prevent the print head 381 from falling off the base 382. The spring mechanism has a support 384 attached to a base 382 of the pressure element 140. A spring 385 is supported between the print head 381 and the support 384. The preload of the spring 385 can optionally be adjusted by means of a thread 387 on the base 382. The folding mechanism 386 has an articulated lever arrangement and supports the base of the pressure element 140.

[0098] The location and direction of pressure of the pressure units 141 can be selected according to the pressure or pain points known from osteopressure and named below, which may include in particular: Hip / Pelvic / Lumbar Spine Region ∘ Insertion of the psoas muscle at the lesser trochanter bilaterally (a) ∘ Origin of the rectus femoris muscle at the anterior inferior iliac spine at the pelvis (symphysis pubis) bilaterally (b) ∘ Origin of the latissimus dorsi muscle at the sacrum (c) and at the iliac crest bilaterally (d) ∘ Origin of the iliocostalis muscle at the iliac crest bilaterally (e) and at the sacrum bilaterally (f) ∘ Origin of the longissimus thoracis muscle bilaterally (g) at the sacrum, at the spinous processes and transverse processes of the lower lumbar vertebrae bilaterally ∘ Origin of the piriformis muscle bilaterally at the sacrum (h) ∘ Insertions and origins of the multifidus muscle at the sacrum and at the transverse and spinous processes of the thoracic and lumbar vertebrae (i) • Origin of the gluteus maximus muscle at the sacrum (j) • Origins of the medius and minimus muscles at the inferior border of the iliac crest (several pressure points each) (k) • Origin of the tensor fasciae lata muscle bilaterally at the iliac crest and anterior superior iliac spine bilaterally (l) • Origins of the adductor brevis and minimus muscles at the pubic bone (m) • Origin of the sartorius muscle at the anterior superior iliac spine bilaterally(n) ∘ Origin of the internal oblique muscle at the iliac crest bilaterally. (o) ∘ Origin of the transverus abdominis muscle at the iliac crest bilaterally. (p) ∘ Insertion of the external oblique muscle at the iliac crest bilaterally. (q) ∘ Origin of the quadratus lumborum muscle at the iliac crest bilaterally. (r) Thoracic / neck region ∘ Insertion and origin of the rectus abdominis muscle at the xiphoid process (lower border of the sternum), at the pubic symphysis bilaterally, and at the 5th-7th cervical vertebrae. Rib (s) ∘ Origins of the sternocleidomastoid muscle on the medial clavicle bilaterally (t) and on the sternum bilaterally (u) ∘ Insertion of the levator scapulae muscle bilaterally on the scapula (v) ∘ Origin of the supraspinatus muscle bilaterally (w) ∘ Insertions of both scalene muscles bilaterally on the first and second ribs bilaterally (x) ∘ Insertions of the trapezius muscle on the acromion and clavicle bilaterally (y) Shoulder region ∘ Origin of the pectoralis major muscle bilaterally on the sternum and clavicle (z) ∘ Insertion of the pectoralis minor muscle bilaterally on the coracoid process bilaterally (aa) ∘ Origin of the short head of the biceps brachii muscle bilaterally on the coracoid process Coracoid muscle on both sides (bb) ∘ Origin of the deltoid muscle on the lateral clavicle on both sides and acromion on both sides.(cc) Posterior aspect of the knee bilaterally. ∘ Origin of both bellies of the gastrocnemius muscle bilaterally. (dd) ∘ Origin of the soleus muscle (ee) ∘ Insertion and origin of the biceps femoris muscle (ff) Anterior aspect of the leg / knee bilaterally. ∘ Origin of the tibialis anterior muscle bilaterally. (gg) ∘ Insertion and origin of the semimembranosus muscle bilaterally. (hh) ∘ Insertion and origin of the semitendinosis muscle bilaterally. (ii) ∘ Insertion of the gracilis muscle on the medial tibia (jj) ∘ Insertion and origin of the adductor magnus muscle (kk) ∘ Origin of the vastus intermedius muscle on the proximal tibia. Femur (ll) ∘ Origin of M. Vastus lateralis on the lat. Femur (mm) ∘ Origin of M. Vastus medialis on linea aspera (nn) .

[0099] The location of the pressure points az, aa-nn listed above is shown schematically in Figs. 48A - 48E, where Fig. 48A represents a front side of the human body Fig. 48B represents the back side of the human body Fig. 48C a pelvic area with the iliac crest of one side of the body Fig. 48D to show a lower area of ​​the sternum with xiphoid, symphysis and 5th-7th ribs of one half of the body, each as cut-out details.

[0100] Fig. 45 shows the chair according to the invention by Fig. 14 In an enlarged view, the pressure elements 141 are assigned to pressure points on the body by the corresponding letter in parentheses, according to the above list and illustration in Figs. 48A-48E, i.e., 141(a) is the pressure element for pressure point a, 141(b) for pressure point b, etc. Where a letter in parentheses is shown in the figure without a further reference number, the reference numeral 141 for a pressure element must always be read as well.

[0101] In addition to their use in osteopressure, the pressure units 141 can also be designed and positioned for use in acupressure or massage. When designed for acupressure, the pressure units can, for example, be positioned and positioned according to energy points traditionally used in Traditional Chinese Medicine (TCM) or acupressure points recognized in Western medicine. When designed for massage, the pressure units can be positioned and positioned according to suitable treatment areas corresponding to a desired massage method.

[0102] For example, 6 neck antennas 142 ( can be attached to the chest support. Fig. 14 , Fig. 45 ) which extend around a neck area and have several pressure units 141. Furthermore, an insert 143 can be recessed into a padding part (shown here for the chest support 6), in which one or more pressure units 141 are contained, wherein the pressure unit(s) 141 can be adjusted in height by means of a locking scale. A hip bar 144 can also be provided, which carries pressure units 141. Individual pressure units 141 can be attached directly to pads 17, 19, 20, 22, 23, 26, 27 or frame parts 9, 16, 18, 24, 25, or can be clamped to them, or be foldable, rotated, swiveled, or extendable from them.

[0103] A cuff 145 can be placed around a pad, e.g., 17 or 19, on any extremity contact surface, or on the leg rest 26, and can bear a pressure point 141. The cuff 145 can have a clamping element 151, which can be clamped, for example, to the thigh pad 17 or the frame 131, and has a holder 152 for a pressure unit 141 for exerting pressure on the inner thigh, as well as a counter-pressure flap 153 for contact with the side of the person's thigh opposite the pressure unit 141. Fig. 15 The pressure of the pressure unit 141 can be adjustable, in particular so that the distance between the counter-pressure tab 153 and the pressure unit 141 can be changed, or the counter-pressure tab 153 or the pressure unit 141 can be used individually. This can be achieved, for example, by changing the width of the cuff, by making the counter-pressure tab 153 or the bracket 152 elastic, or by moving the bracket 152. If the inherent rigidity of the cuff 145 is insufficient, a locking mechanism can be provided between the counter-pressure tab 153 and the bracket 152 to prevent movement.

[0104] For the posterior shoulder area, a thoracic spine / shoulder module 460 can be provided, which, for example, can be attached to the back support 23 ( Fig. 1 ) can be attached or integrated ( Fig. 46 In addition to pressure units 141, the BWS / shoulder module 460 has nodules 461 that rise in an area of ​​the thoracic spine and can, for example, exert a massage effect.

[0105] Fign. 47A - 47C Figure 1 shows a possible position of pressure elements 141 on the surface of a step stool 470. The step stool 470 has an approximately saddle-shaped seat surface such that one can sit on it in a step-like position, so that one sits on one half of the step stool with the underside of one thigh and on the other half with the upper side of the other thigh. The upper body is thus arranged at a right angle to a seated position as on a saddle, i.e., that the front surface of the upper body runs approximately parallel to the front edge of the step stool. This results in the hyperextension of the hip according to the invention, even without counter-support elements on the upper body.

[0106] The pressure elements are located above the insertion of the psoas muscle on the lesser trochanter (141(a)). The stool can be rigidly or pivotally designed at the top of the stool, and in the case of a split seat, the two halves can pivot relative to each other.

[0107] The pressure units 141 can operate completely passively and are simply arranged to exert pressure on a defined point of the person's body. It is preferable for each pressure unit 141 to act in a direction in which the person's body encounters a counter-support in the form of a part of the chair according to the invention or another pressure unit 141. Optionally, pressure units 141 can also be designed to be active, for example, by exerting a delivery movement, vibration, pulsation, rotation, rolling, or kneading, or by transmitting electrical charges, magnetic or electromagnetic fields, heat, or cold. A delivery movement can be helpful for adapting to individual body dimensions and / or for determining the applied pressure. Particularly when designed for acupressure treatment, the targeted heating or cooling of the pressure points can be utilized.

[0108] The pressure units 141 can optionally have adjustable pressure, for example, via an adjustable spring mechanism or motor. For this purpose, a force sensor can be provided on each pressure unit 141, the output signal of which is fed to a controller and / or control display. In a controller, the individual pressure units 141 can be controlled according to a manually specified pressure value or one determined by an algorithm, possibly taking into account predetermined threshold values. Furthermore, time control of the pressure application is also optionally possible. Additionally, the pressure units can be folded away or retracted individually or in modules to prevent them from exerting further pressure. In the case of a controller, an emergency stop function can also be provided.

[0109] A further optional addition to the chair according to the invention relates to a head module 160 ( Fign. 16, 17 The head module 160 comprises a frame 161, a forehead pad 162 at one end of the frame 161, and two neck pads 163 at the other end of the frame 161. Two neck pads 163 are attached to the lower part of the frame 161 via two side struts (previously known from older dental chairs). The neck pads 163 lie bilaterally against the skull in the mastoid region. When in use, the neck pads 163 support the skull from behind and exert a slight upward pressure, thereby gently stretching the posterior muscles of the cervical spine. The forehead pad 162 acts as a counter-support. This allows for significant relief of the neck muscles. A fastening 164 serves to attach the head module 160 to a part of the chair according to the invention. The head module 160 has a spring and extension mechanism 165 that allows movement of the head forward, backward, and sideways. In addition, the spring mechanism causes the neck to stretch.

[0110] This head module 160 represents a separate inventive concept that can be used independently of the chair described above, with and without the front end of the bar 161, which supports the forehead cushion. It primarily helps to counteract excessive strain on the neck.

[0111] The attachment 164 can also be configured with a pivot-sliding mechanism 166, which includes a part of the chair having a curved rail that slides along the bracket 160 and simultaneously rotates so that the axis of rotation of the head is approximately aligned with the dens axis and the cervical spine. The rail can be arranged with a separate support, wherein the bracket 160 is formed integrally with the support 164 and is guided along the rail.

[0112] The swivel-sliding mechanism can consist of one plane or, for better stability, of several planes.

[0113] As a further addition, massage devices can be incorporated into all or selected upholstery elements of the chair according to the invention. Furthermore, all or selected upholstery elements of the chair according to the invention can have a structure that exerts a passive massage effect.

[0114] A further optional addition concerns the footrest 14. In previous embodiments, the footrest 14 is designed as a simple plate which is adjustable for stretching the calf muscles. This adjustment can be further enhanced by a spring mechanism 185. The footrest can accommodate pressure mats available on the market from various manufacturers (e.g., Kybun® mat or aeris® muvmat, etc.). According to the addition, the footrest can have a heel stop or heel pad 181, an upwardly adjustable toe stop 182, and a hold-down device 183. Fig. 18 The hold-down device 183 can be designed in a simple version as a strap or band, or in a more complex version as a movable and lockable pressure element, optionally with padding. This allows for a foot position with the toes raised, which stretches the toe flexor muscles and their associated tendons, ligaments, and fascia. The foot support 14 can optionally be made telescopic by means of an adjustment mechanism 186 to accommodate different foot lengths.

[0115] In Fign. 19 bis 24 This is a simple variant (variant 2) of the chair according to the invention. Most of the optional functions are omitted. In its basic design, the chair is to be used like a normal office chair ( Fig. 23 ).

[0116] According to the invention, this variant also has the possibility of hyperextension of the hip ( Fig. 24 ).

[0117] Variant 2 comprises a chair with a seat 201 and a seat extension 202 that projects backward over a backrest 203. The seat halves 204 and 205 of the laterally divided seat 201 can each be individually adjusted downwards, folded down, and locked in place via the central joint 3; they can also be optionally spread apart. A further support element 207 for the lower leg can be folded out from the seat 201; this element can also be locked and spread apart. An additional pull-out or attachable / foldable extension 210 can be provided. Fig. 24 In the use according to the invention, the person sits astride the seat surface 201 or a seat surface half 204 left in a horizontal position, and the backrest 203 serves as an abdominal support 7. One thigh projects under the backrest 203 (abdominal support 7) and rests on the seat surface extension 202, which now serves as a leg rest 26. The other leg rests with the front of the thigh on the downwardly inclined seat surface half 204, which thus serves as a thigh support 11 and forms part of a lower body section with a lower body contact surface in accordance with the invention. This results in this leg being hyperextended posteriorly at the hip. The lower leg rests on the unfolded support element 207 with the optionally extended, attached, or unfolded extension 201. The support element 207 with the extension 210 thus serves as a lower leg support 12. The backrest 203, which serves as an abdominal support 7, can be extended continuously ( Fig. 21 ) or have recesses 206 designed for positioning the legs forward ( Fig. 22 Alternatively, this part can also be used as in the first embodiment ( Fign. 1, 2 ) be executed.

[0118] Fig. 25 und 26 show various optional possibilities for spreading, rotating and torsion of the chair according to the invention, e.g. Fig. 1 in different positions.

[0119] Fig. 27 shows a chair according to the invention in the form of a kneeling bench with hip support element 20 (variant 3), which also has the hyperextension of the hip according to the invention.

[0120] Fig. 28 Figure 4 shows a chair in which the seat can be lowered backwards on one side at a time. This allows one leg to be extended backwards at the hip and rest on the lowered section, even while sitting normally. The mechanism is otherwise identical to Figure 2. The central joint 3 is mounted on a frame (not shown in detail) and can also be designed to be spread apart and rotated.

[0121] Fig. 29 shows one possible application of the chair according to the invention, e.g., of Fig. 1 with pivoting central joint 3 and lower intermediate joint 13. This position can also allow unilateral hyperextension of the hip joint when used as an office chair.

[0122] Fig. 30 Figure 5 shows a chair according to the invention in the form of a saddle stool with abdominal support 7 and height adjustment and a thigh support 11, which enables the hyperextension of the hip according to the invention.

[0123] Fign. 31-33 They show one variant (variant 6) in which the backrest becomes a thigh support and the seat a pelvic support. A further variant of this ( Fig. 33 ) has a lower leg support that can be folded out once or multiple times.

[0124] Fign. 34A - 34E show one possible design of an armrest 341 which can be converted from a functional position as an armrest 342 via a folding / swivel mechanism 343 ( Fig. 34A ) into a function as a foot caster 22 (see also Fig. 1 ) is convertible.

[0125] Fig. 35 shows the chair in variant 1 after Fig. 1 in a further embodiment of the invention with a further frame option. The functionality largely corresponds to that described in Fign. 1-12 The base pivot joint is divided into a first base pivot joint 351, a second base pivot joint 352, and the central joint 3. The first base pivot joint 351 is attached to the piston 39 of the gas cylinder 38 of the base 4 and is connected to the second base pivot joint 352 via a first strut 353, which is pivotable relative to the piston 39 in the first base pivot joint 351. The second base pivot joint 352 is connected to the central joint 3 via a second strut 354, which is pivotable relative to the first strut 353 in the second base pivot joint 352. As described, the rocker arm 9 of the support 7 is articulated to the central joint 3. Furthermore, the thigh support 16 of the thigh support 11 is also articulated to the central joint 3. An auxiliary strut 357 can also be articulated or rigidly connected to the central joint 356, ending in a support joint 356.A telescopic rod 355 can extend between the support joint 356 and another joint 359 on the thigh support 16. This allows the inclination of the thigh support 11 to be adjusted without having to loosen the pivot joints 351, 352, or the central joint 3. An auxiliary swing arm 358 is supported by the central joint 3 and can optionally be pivotally connected to it. The footrest 25 and the leg rest 26 can be connected to the auxiliary swing arm 358 so that they can be folded horizontally for use and vertically when not in use. All joints can be released and locked as described. This frame option is shown in the figure without a lower leg section; however, such a section can, of course, be present, as can other described elements (optionally removable and shown as removed in the figure), such as a hip support element, foot roll, back support, knee rest, etc.

[0126] Fig. 36 shows the chair in variant 1 after Fig. 1 with a further frame option, the folded lower leg support 12 and folded leg rest 26 with footrest 25 and a headrest 361. The functionality largely corresponds to that in Fign. 1-12 or 35 shown.

[0127] Fig. 37 Figure 371 shows an optional folding mechanism 371, which is particularly advantageous to use on a chair according to the invention designed as an office chair and improves the stability of the chair according to the invention. Preferably, the chair is arranged such that the folding mechanism 371 unfolds automatically when the chair is in a prone position ( Fig. 1 The gas spring is adjusted (ua) and provides broad support on the floor. For this to work, the gas spring must be in its highest position in this example. Other variations are also possible. For instance, the struts of the base 4 could be extendable and optionally extend automatically when the chair is set to a prone position.

[0128] Fig. 39 Figure 1 shows a chair according to a further embodiment of the invention in the form of a stand variant, in which the upper body section 1 and the lower body section 2 are connected to each other as a rigid frame with a rigidly attached base 4 and which is also equipped with hip support element 20 and foot caster 22.

[0129] Fig. 40 shows a table-mounted version with a screw clamp 401.

[0130] Figures 41A to 41D show three variants of a shoulder module 410 in different views. The module is to be attached to the side wings 32 of the chest support 6, can be telescopic and, for example, mounted on a ball bearing to allow shoulder mobility within a range of motion for normal office work. The shoulder module can be designed to be foldable.

[0131] Fign. 42A bis 42C show the back support 23 of Fig. 1 In one variant, pressure elements 141 are shown in side, front, and top views. The pressure elements 141 are identified in the figure by the corresponding letter in parentheses, along with their associated pressure point on the body, as listed above and illustrated in Figures 48A-48E. For example, 141(d) is the pressure element for pressure point d, 141(i) for pressure point i, etc. Where a letter in parentheses is shown in the figure without a further reference number, the reference numeral 141 for a pressure element should always be implied. The back support 23 can be used with or without pressure elements 141. The pressure elements 141 exert pressure on the attachment points of the back muscles. Pressure on the back with pressure elements 141 can only be applied for a limited time, generally about 5 minutes per day. One variant is a back support without pressure elements.

[0132] Fig. 43A und 43B Figure 1 shows a chair element 430 according to the invention as an attachment variant in two views. The chair element 430 corresponds to the lower body section 2 of the first and third variants with a thigh support 11 (204) and a lower leg support 12 (207) and a lower intermediate joint 13. An extension 210 can optionally be provided on the lower leg support 12.

[0133] The chair element 430 has a screw clamp 431 arranged laterally on the thigh support, with which the chair element can be attached to a conventional chair, in particular to its chair leg, in order to cause hyperextension of the hip. The attachment can also be achieved in another way.

[0134] The chair element 430 represents an independent inventive concept.

[0135] Fig. 44 Figure 1 shows a modification of the chair according to the invention as a chair attachment variant, which is to be attached to another piece of seating furniture 440. For this purpose, the chair of this modification has a hook-in device 441. The attachment can also be achieved in other ways. To improve stability, an anti-tip device 442 is optionally provided, which can be mounted on the seating furniture. Instead of a piece of seating furniture, this variant can also be attached to other objects such as a railing, a balustrade, or a window frame. Thus, the invention can also be used, for example, in observation or surveillance situations with their often long periods of sitting or standing.

[0136] The thigh support or seat surface can also be divided transversely, i.e., in a direction parallel to the axes of the central joint 3, the base pivot joint 5, or the intermediate joint 13. Such a transverse division can be advantageous for storing the hip support element 20 when not in use.

[0137] The following is a further embodiment in which identical parts are marked with the same reference numerals and the above explanations apply equally, unless otherwise stated below ( Fig. 49 bis 56 ).

[0138] In this further embodiment, the base pivot joint 5 is implemented by a parallel link arrangement. Such a parallel link arrangement has already been explained above.

[0139] In this embodiment, the thigh support 11 (thigh support 16) as a whole and the lower leg supports 12 are pivotable laterally. It can also be extendable in the axial direction or axially pivotable at the lower intermediate joint 13. The lower intermediate joint is located under the front seat surface.

[0140] The hip support 20 and the foot roller 22 can be implemented in an attachment 490. Fig. 53 bis 56 The attachment 490 can be mounted on the left or right side. For this purpose, two swivel bearings 510 are provided, which are attached to the thigh beam 16, the central joint 5, or the joint 3. Optionally, one of the swivel bearings 510 can support the pivot shaft 530. In this case, the locking device 511 can engage in the detent groove 531 of the pivot shaft 530 and axially fix the pivot shaft 530. The locking device 511 can be designed as a locking screw, which also fixes the pivot position of the pivot beam 491. This can be achieved, for example, by a clamping action or a circumferential detent in the detent groove 531. Alternatively, the locking point 511 can be designed as a simple detent bolt; in this case, the pivot position of the pivot arm 491 is determined in another way, e.g., by a circumferential detent at the shaft end 533 or at the shaft seat 534 and a counter-detent in the rotary bearing 510.

[0141] Elements 491-494 form the hip support element 20. The telescopic pole 492 is slidably mounted in the swivel pole 491 and pre-tensioned away from the device by a spring element. The telescopic pole 492 can be moved towards the device against the spring force by means of the rotary knob 512. During this movement, the release lever 513 can engage incrementally with the ratchet ring 532 of the swivel pole shaft 530, thereby fixing the position of the telescopic pole 492. By actuating the release lever 513, the engagement is released, and the telescopic pole 492 can then move away from the device under spring action. This releases the pressure exerted by the hip support element 20, which would otherwise cause hip hyperextension, and allows the person to be freely released.

[0142] Elements 491, 495-497 form the foot caster 22. For safety reasons, the foot caster 22 can only be designed on one side: hooking the feet on both sides could pose a risk of accidents, which is avoided by the one-sided design. Further alternative configurations of the foot caster have already been explained above and can be applied here as well.

[0143] The pivot lever 495 is pivotally and slidably mounted on the pivot arm 491. For this purpose, two guide rails 436 and a detent track 540 can be provided on the pivot arm 491. A sliding bearing 437, which supports the pivot lever 495, can slide along the guide rails 436 on the pivot arm 491. A detent pin 538 can optionally engage in a detent of the detent track 540 and fix the slidable position of the pivot lever 495. The detent pin 538 also forms a pivot axis for the pivot lever 495 in the sliding bearing 437. To limit the pivoting movement of the pivot lever 495, a guide pin 561 can be guided in a mechanism 560. A free lever end 562 can be tapered and received in a correspondingly shaped lever end receptacle 514, which can also be attached to the pivot arm 491 or to the end of the slide rails 536.This also allows the pivot position of the swivel lever 495 to be fixed, which can be particularly advantageous in the seating configuration of the chair.

[0144] As an option, instead of the foot roller 22, only a strap or a loop or the like may be provided.

[0145] The substructure 500 for the thigh pad 17 is attached to the thigh support 16, to which the thigh pad support 501 and the pad 502 are attached. The thigh pad 17 is shown in the following for clarification. Fign. 49-52 omitted.

[0146] The hip support element 20 can be folded down so that the crossbeam 493 rests on the support 502, with the cushion 494 facing upwards. For adjustment of the hip support cushion 494, it can be mounted on a hip cushion support 522, which is coupled to the crossbeam 493 via a swivel bearing 523. The swivel position in the swivel bearing 523 can be fixed by means of a locking mechanism 524. The thigh cushion 17 (not shown here) extends only over the length of the thigh cushion support 501. The hip support cushion 494 and the thigh cushion 17 can thus together form a seat surface. The support 499 can be offset in height relative to the thigh cushion support 498 so that 17 and 493 form a single plane. This corresponds to the transverse division described above. This also allows for easy conversion of the chair into the seat configuration (see, for example, [reference]). Figs. 9, 10 , 19, 20 , 35, 36) possible. In the standing configuration shown, the shorter thigh pad 17 is advantageous because it then ends above the kneecap and does not impede the kneecap.

[0147] The upper intermediate joint 8 between the chest support 6 and the abdominal support 7 can pivot in at least two degrees of freedom: about the transverse axis and about the longitudinal axis of the arm 9. The abdominal support 7 can be slidable on the arm 9. The leg rest 26 can be slidable on the arm 9, which for this purpose can be extended downwards beyond the central joint 3, which connects the upper body section 1 and the lower body section 2.

[0148] In this embodiment, the lower leg pad 19 is divided into two parts per leg: an upper part and a lower part. The upper part is pivotable relative to the lower leg support 18, and the lower part is slidable. The lower leg support 18 can be telescopically adjustable in length or slidable relative to the thigh support 16 at the lower intermediate joint 13. The end joint 15 can have a bracket that is slidable on the lower leg support 18 and a pivot joint located distally on the bracket.

[0149] In principle, all the joints described above can be locked in place. Locking can be achieved, for example, by friction, by pressing corresponding friction surfaces together. Alternatively, locking can be achieved by pressing correspondingly structured surfaces together. Such surfaces can have features such as raised and recessed areas, like corresponding teeth or indentations, that interlock. Another option for positive locking is for a detent element to engage in recesses formed on both sides of the joint. A simple example of this is a socket with a through-hole and a perforated ring or disc segment running alongside the socket. Depending on the pivot position of the joint, the through-hole aligns with one of the holes in the ring or disc segment, allowing a pin to be inserted through them.Experts are familiar with various forms of such locking joints, for example from the field of office chairs, training equipment or treatment chairs / beds.

[0150] The invention is limited only by the appended claims, but not by any other details described in the exemplary embodiments. Details described in one exemplary embodiment may be used in other exemplary embodiments, even if they are not described in detail therein. Likewise, details may be omitted if they are not essential for realizing the features defined in the independent claims. For example, a central joint 3 may be omitted if only the upper body section 1 and the lower body section 2 are arranged in a position relative to each other in which their bearing surfaces provide the desired hyperextension of the hip joint to a person lying prone on them. Similarly, other joints, such as the intermediate joints 8, 13, the end joint 15, and the base pivot joint 5, may be replaced by a rigid connection.All described adjustment options are optional.

[0151] When using the chair according to the invention, it is advantageous to ensure that stretching postures, in particular hyperextension of the hip joint, remain within the non-pathological range, i.e., within the normal range of motion of the respective joint. This non-pathological hyperextension range of the hip joint naturally depends on the individual's level of fitness. While the neutral-zero method used in expert assessments typically specifies a maximum hyperextension of 15° for a normal range of motion, significantly higher values ​​can be achieved in a suitably trained individual, as can be observed in gymnasts and acrobats.

[0152] The chair according to the invention is a completely new concept and is capable of supporting a person's body in a prone position, counteracting shortening of the hip flexor muscles and associated tendons, ligaments, and fascia, and enabling further positions to achieve additional stretching and / or relief postures. The chair is suitable for use in both residential and work environments, such as offices, workshops, monitoring areas, vehicles, assembly lines, laboratories, and for medical, physiotherapeutic, or surgical procedures. It can be used by laypersons, treating physicians or therapists, and patients alike. It can be adjusted for standing, sitting, bent-over, squatting, kneeling, and lying positions.

[0153] By incorporating the pressure units 141 according to the invention with the corresponding modules, holders, etc., a considerable increase in the stretching effect and effective relaxation can be achieved, and additional therapeutic effects can be obtained.

[0154] The features included in the embodiments described above are largely optional and interchangeable. The invention is defined by the respective independent claims. Advantageous further developments and embodiments defined in the dependent claims may constitute further independent inventions. Each feature described above may, alone or in combination with other features, constitute an independent invention, both in expressly described and in combinations and subcombinations not specifically described.

[0155] For example, all or selected of the pressure units 141 may or may not be provided in all embodiments, variants and modifications of a chair according to the invention shown in the figures and described above.

[0156] Wherever a joint is described in one embodiment, variant or modification, this joint may also be omitted and may take any form described in another embodiment, variant or modification.

[0157] Furthermore, in all embodiments, variants or modifications, all features of embodiments, variants or modifications from which they are derived shall also be applied, even if not expressly described, unless such application is expressly excluded, modified or obviously not possible.

[0158] Furthermore, all additions or extensions, options or alternatives described in an embodiment, variant or modification can be applied individually or in any combination or sub-combination in the same or another embodiment, variant or modification, provided that it does not leave the realm of what is technically sensible or possible, and the objects thus obtained can in turn constitute independent inventions. List of reference symbols 1 upper body section 131 Frame 2 Lower body section 141 Pressure unit 3 Central joint 141(a) Pressure unit for pressure point a 4 Base 141(b) Pressure unit for pressure point b 5 Base swivel joint ... etc. 6 chest support 142 neck antenna 7 Abdominal support 143 Insert for xiphoid pressure element 8 (upper) intermediate joint 144 hip belt 9 Swing 145 cuff 10 Leg part 151 Clamping part 11 Thigh support 152 bracket 12 lower leg support 153 Counter-pressure tab 13 (lower) intermediate joint 160 Head module 14 footrest 161 Iron 15 End joint 162 Forehead padding 16 thighbone 163 neck pad 17 thigh pads 164 fastening 18 lower leg collateral ligament 165 Spring and pull-out mechanism 19 lower leg pads 166 Swivel-sliding mechanism 20 hip support element 181 Heel strike 22 foot caster 182 Toe stop 23 back support 183 Rist hold-down 24 Knee pad 185 spring mechanism 25 upper footrest 186 Adjustment mechanism 26 leg rest 201 Seat area 27 Edition expansion 202 Seat extension 30 Single joint 203 rest 31 Sternum support / strut 204,205 Seat halves 32 Side wing 206 recess 33 Ribbed shell 207 bearing element 34 Abdominal area 210 extension 36 base frame 341 armrest 37 cuff 342 armrest 38 Gas cylinder 343 Folding / swivel mechanism 39 Pistons 351 first base swivel joint 51 hold-down device 352 second base swivel joint 353 strut 510 pivot bearing 354 strut 511 Lock 355 telescopic pole 512 Rotary knob 356 Support joint 513 Release lever 357 Auxiliary strut 514 Lever end mounting 358 Auxiliary swing arm 519 Chair roll 359 joint 520 swivel bearing 361 headrest 521 Locking bolt 371 Folding mechanism 522 hip pad straps 381 printhead 523 pivot bearing 382 base 524 Lock 383 spring mechanism 530 Swivel shaft 384 abutment 531 Locking groove 385 Feather 532 Rastenkranz 386 Folding mechanism 533 Wave end 387 thread 534 Wave seat 401 Screw clamp 536 Slide rail 410 Shoulder module 537 Plain bearings 430 Chair element 538 Locking bolt 431 Screw clamp 540 Rest area 440 Seating furniture 560 facial expressions 441 Hooking device 561 sliding bolt 442 Tilt protection 460 BWS / Shoulder module 461 studs 470 Step stool 490 attachment 491 Swivel handle 492 telescopic pole 493 crossbeam 494 hip pressure pad 495 Swivel lever 496 crossbeam 497 Foot cushion 500 substructure 501 Thigh pad support 502 Edition 503 Height adjustment

Claims

1. A chair for receiving a person in a standing position, in particular a leaning position, comprising: - an upper body section forming an upper body support surface which is adapted or adaptable to at least parts of the front or back of the torso of a person sitting on the chair, and - a lower body section forming a lower body support surface which is adapted or adaptable to at least parts of at least one front of the thigh of the person received in a standing position, wherein the upper body section and the lower body section can be fixed in a position relative to each other such that the upper body support surface and the lower body support surface cause a hyperextension of the hip joint of the person received in a standing position with a predetermined hyperextension angle, by limiting the angle of the upper body support surface and the lower body support surface to less than 180° in the hyperextension direction.wherein a hip support element adjustable in its position is provided, which is designed to rest against the back of the person's hip, and which can be fixed in a position such that it prevents the person's hip from moving out of position.

2. Chair according to claim 1, characterized by that the overextension angle is at least a few degrees, such as at least 3° or at least 5° or at least 7° or at least 10°, wherein the overextension angle is preferably adjustable up to 90° or more.

3. Chair according to one of the preceding claims, characterized by that A support element is provided which is designed and arranged, or can be arranged and fixed, to support the person's body downwards, wherein the support element is preferably designed as a footrest, kneerest, knee / shinrest or buttocks support, or seat shell or saddle-like.

4. Chair according to one of the preceding claims, characterized by that the upper body section and the lower body section are connected to each other by a central joint, wherein the central joint allows the lower body section to pivot relative to the upper body section or vice versa about a transverse axis, and wherein the central joint is lockable, in particular lockable by positive locking.

5. Chair according to one of the preceding claims, characterized by thatthe lower body section has two leg parts, wherein the central joint has two individual joints, each individual joint enabling a pivoting of a leg part of the lower body section relative to the upper body section about a transverse axis, and wherein each individual joint is lockable, in particular lockable by positive locking, wherein preferably each individual joint of the central joint enables a rotation about a longitudinal axis of the leg part and / or the individual joints enable a pivoting of the leg parts about a sagittal axis.

6. Chair according to one of the preceding claims, characterized by thatThe upper body section has a chest support for supporting at least part of the person's rib cage and an abdominal support for supporting at least part of the person's abdomen, wherein the chest support and the abdominal support are rigidly connected to each other or pivotably connected about a transverse axis by means of an upper intermediate joint, wherein preferably a rocker arm is provided between the central joint and the upper intermediate joint, wherein the rocker arm is particularly preferably designed to be telescopic, wherein further preferably the chest support and the abdominal support are pivotable together relative to the rocker arm.

7. Chair according to one of the preceding claims, characterized by thatThe lower body section as a whole or two separately pivotable leg sections of the lower body section each have a thigh support and a lower leg support, which are rigidly connected to each other or pivotably connected about a transverse axis by means of a lower intermediate joint, wherein preferably the thigh support is attached to the central joint.

8. Chair according to claim 7, characterized by that the lower body section as a whole or the leg sections each have or have a footrest designed to support a person's foot and which is rigidly or pivotably connected to the lower leg support by means of an end joint about a transverse and / or a sagittal and / or a longitudinal axis, wherein the footrest is preferably adjustable in its distance from the intermediate joint.

9. Chair according to claim 8, characterized by thatthe footrest has a toe stop designed for hyperextended positioning of the toes of the body, wherein the toe stop is preferably adjustable in its distance to the end joint, wherein the footrest further preferably has a heel stop and / or an instep support.

10. Chair according to one of claims 7 to 9, characterized by thatat least one of the following elements is provided: a footrest, which is arranged or can be arranged in the area of ​​the lower leg support and / or in the area of ​​the thigh support, in particular near the lower intermediate joint of the lower body section and / or below the central joint; a foot roller, which is designed and arranged or can be arranged for hooking a foot in an angled position of a knee behind the person's hip, wherein the foot roller is preferably adjustable in its position; a knee support, which is designed and arranged or can be arranged for supporting a knee on the lower body section, wherein the knee support is preferably adjustable in its position; a back support, which is designed and arranged or can be arranged for supporting a back and is located above the hip support element, wherein the back support is preferably adjustable in its position; a leg rest.which is designed and arranged, or can be arranged, for the horizontal placement of a person's leg in front of the body in an area in front of the hip, wherein the leg rest is preferably pivotable and / or telescopic and further preferably has an extension that is pivotably, in particular foldably, and / or telescopically connected to the thigh rest.

11. Chair according to any of the preceding claims, characterized by thatA head module is provided which holds the head of a person seated on the chair in the physiological position and guides it during movement, wherein preferably two pads or other anatomically shaped parts encompass the mastoid on both sides and pull it backwards and upwards, and a forehead support is provided as a counter-bearing, wherein preferably the head module enables forward, backward and / or sideways movement of the head by means of a spring or hydraulic mechanism or similar, and in particular allows rotation that approximately corresponds to the axis of the dens axis via a rail sliding mechanism.

12. Chair according to one of the preceding claims, characterized by thatThe lower body section as a whole, or two separately pivotable leg sections of the lower body section, each have a thigh support with a thigh pad which is formed above and ends above the kneecap of the person who is in a standing position in the chair.

13. Chair according to any of the preceding claims, characterized by that the chair is convertible or adjustable into a sitting position designed to accommodate a person in a seated position, wherein preferably in the sitting position the lower body section serves as at least a partial seat surface and the upper body section serves at least a partial backrest, in particular a backrest.

14. Chair according to claim 13, comprising a seat divided into a first partial seat and a second partial seat, wherein the second partial seat is inclined or tiltable at an angle to the first partial seat such that, when a person sits with the posterior thigh of one leg on the first partial seat and the anterior thigh rests against the second partial seat, the first partial seat and the second partial seat cause a hyperextension of the person's hip joint with a predetermined hyperextension angle.

15. Chair according to any of the preceding claims, characterized by the fact thatThe chair has a pressure device for application to the human body, attached to it or permanently or detachably connected to it, wherein the pressure device has one or more pressure units, each with at least one pressure head designed to exert local or point pressure at a predetermined pressure point on the body of a person seated on the chair, wherein preferably at least one pressure unit of the one or more pressure units is adjustable in location and / or direction and / or pressure intensity and / or has a replaceable pressure head and / or is designed to exert a delivery movement, vibration, pulsation, rotation, rolling or kneading or to impart electrical charges, magnetic or electromagnetic fields, heat or cold, and / or is adjustable in pressure intensity, preferably via a spring mechanism or a hydraulic system.pneumatic or motor drive, and / or has a force sensor that outputs a signal corresponding to a force exerted by the pressure unit.

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