The subject of the present invention is a rehabilitation apparatus designed for shaping the human body figure in the sitting position, including rehabilitation exercises and prophylactic treatment of human bone and skeletal system.

From the protective description of the utility model No PL 66963 Yl, a therapeutic chair consisting of a seat based on a column provided with a base is known. The seat consists of a central part, to the sides of which there adjoin triangular, side parts. The external apexes of the side part are backed up by springs resting on a support mounted to the column so that the seats move in time against the central part. The protective description does not reveal detailed information on the connection of the side parts to the central part.

On the other hand, from the application description KR 20160112475 A there is known a chair for human posture correction. The chair consists of a base to which there is centrally mounted a column to which a seat with a backrest is mounted. The seat consists of the first base to which there is slidingly mounted along the central axis the second base on which there is rigidly mounted the third base provided on its sides with articulated units with horizontal axes parallel to the first axis, the external side of the first load- carrying plate being mounted to the first couple of the articulated joint units and the external side of the second load-carrying plate being mounted to the second couple of the articulated units. The second base can be slidingly moved forward by a person sitting on the seat and it returns under the influence of an extension spring. The first load-carrying plate and the second load-carrying plate form the top working area of the seat, there being a gap between them. After sliding the first plate forward, it is possible to raise its rear part, that is, from the backrest side, upwards. The articulated units are equipped with flexible modules so that the load-carrying plates in an unloaded state lie approximately within one plane but, on the other hand, when sat on, the internal edges of the load -carrying plates are lowered against the external edges so that the load-carrying plates form an obtuse angle. The load-carrying plates slide together along the first axis.

The essence of the rehabilitation apparatus containing a seat consisting of two load-carrying plates slidingly mounted along the central horizontal seat axis consists in that on the first base there is slidingly set, along the central axis, the first vertical unit to which there is mounted from the top the first load- carrying plate and the second vertical unit to which there is mounted from the top the second load-carrying plate, the first base being set on a side guide bar with its axis being perpendicular to the central axis whereas the first vertical unit contains a vertical guide bar, on the top of which there is set a vertical slider and the first load-carrying plate mounted to it, the side guide bar being additionally connected to the first base by means of the side slide unit whereas the first base is connected to the first vertical unit by means of the first slide unit and is connected to the second vertical unit by means of the second slide unit and the second base is connected to the first load-carrying plate by means of the vertical slide unit. To increase the stability of the apparatus, the first guide bar is connected by means of the third base to the second guide bar on which the first base also rests.

In a special case, the vertical guide bar and the vertical slide unit form one compact unit.

On the other hand, the first base preferably consists of two parts, the first part and the second part interconnected with a rod.

In another variant, the mounted vertical unit of the second base consists of the first vertical guide bar with the first vertical guide and the second vertical guide bar with the second vertical guide, the first load-carrying plate being mounted to both guides by means of a support. On the other hand, between the vertical guide bars there is a vertical slide unit mounted between the second base and the support.

The first load-carrying plate is preferably connected to the vertical slider by means of the support.

In the third variant, between the load-carrying plate and the support there is preferably a cylindrical cam with a vertical axis of rotation, driven by a rotational unit.

On the other hand, in the fourth variant the first base consists of two parts, the lower part and the second part lying over it and a cylindrical cam set between them and having a vertical axis of rotation.

The cylindrical cam preferably consists of a fixed disc against which the movable disc leans and is pendulously connected to it in the axis of rotation of the movable disc. The movable disc is rotated against the fixed disc preferably by means of the rotational unit. The object of the invention is presented in embodiments on the schematic drawing where:

• fig. 1 presents a front view of the seat according to the first variant,

• fig. 2 presents a side view of the seat,

• fig. 3 presents a top view of the seat,

· fig. 4 presents a front view of the seat according to the second variant,

• fig. 5 presents a side view of the seat,

• fig. 6 presents a front view of the seat according to the third variant,

• fig. 7 presents a front view of the seat according to the forth variant.

Figures 1 - 3 present the seat according to the first embodiment variant.

Figure 1 presents a front view of the seat. The seat consists of a side guide bar (1) on which there are based side guides (2, 3) to which the first base (4) is mounted. On the first base (4) there are mounted two front guides (7a, 7b) on which there are set two identical vertical units (5a, 5 b) to which load- carrying plates (6a, 6b) of the seat are mounted from the top. The first vertical unit (5a) consists of a first front guide (8a) on which a vertical guide is mounted (9). On the vertical guide bar (9) there is set a vertical guide (10) with a first load-carrying plate (6a) mounted to it by means of a support (11). The side guide bar (1), the first front guide bar (7a) and the vertical guide bar (9) are rectilinear, the first front guide bar (7a) track being parallel to the central axis and being perpendicular to the side guide bar (1) track. The central axis is meant to be the axis along which a person moves while sitting down and getting up from the seat. The central axis also lies within the central plane of the seat symmetry. The first base (4) is additionally connected to the side guide bar (1) by means of a side slide unit (12) so that the first base (4) along with the load- carrying plates (6a, 6b) mounted to it can be moved aside against the central axis.

Figure 2 presents a side view of the seat. On the side guide bar (1) there is set the first side guide (2) to which, in turn, the first base (4) is mounted. On the first base (4) there is mounted the first front guide bar (7a) on which there is set the first vertical unit (5a) to which the first load-carrying plates (6a) of the seat is mounted from the top. The vertical unit (5a) consists of longitudinal guides (8a, 8b), set on the first longitudinal guide bar (7a), to which there is mounted the second base (14) to which the vertical guide bar (9) is mounted. On the vertical guide bar (9) there is set a vertical guide (10) with a first load- carrying plate (6a) mounted to it by means of a support (11). Furthermore, between the first front guide bar (7a) and the second base (14) there is mounted the first front slide unit (15a) and between the second base (14) and the support (11) there is mounted the vertical slide unit (16).

Figure 3 presents a top view of the seat without the load-carrying plates (6a, 6b). On the side guide bar (1) there are set side guides (2) to which, in turn, the first base (4) is mounted. Front guide bars (7a, 7b) are mounted to the first base (4), the first vertical unit (5a) being slidingly set on the first front guide bar (7a) and the second vertical unit (5b) being slidingly set on the second front guide bar (7b). The vertical unit (5a) consists of the second base (14), provided from the bottom with front guides (8a, 8b), over which a support (11) is located. The side guide bar (1) is additionally connected to the first base (4) by means of the side slide unit (12). On the other hand, the first base (14) is connected to the first vertical unit (5a) by means of the first longitudinal slide unit (15a) and to the second vertical unit (5b) by means of the second longitudinal slide unit (15b).

The rectilinear guide bar is considered to be every apparatus which will enable a guide set on it to over along a straight line. The slide unit is considered to be every apparatus which will enable a controlled movement of a guide on a guide bar in both directions. It can be a servomotor, a rotary engine with a transmission, a propeller, a hydraulic or pneumatic actuator or a linear motor. The slide unit and the guide bar can form a single compact unit, for example, taking the form of a power screw with a nut set in the guide bar or two telescopically interconnected tubes with an actuator coaxially provided on them.

To use the seat for preventive or rehabilitation purposes, a given person sits on the seat so that the left part of the pelvis rests on the first load-carrying plate (6a) and the right part on the second load-carrying plate (6b). Then the slide units (12, l5a, 15b, 16) are turned on so that the load-carrying plates (6a, 6b) perform, according to an algorithm pre-set by the control unit, complex movements which consist of side movements and front movements and, moreover, each of the load-carrying plates (6a, 6b) performs vertical movements independently from each other. The purpose of these movements is to cause, by force, an effect of relocation of the centre of gravity of the sitting person’s body, corresponding to its movements during a free walk on a flat surface, and thus, to exercise muscles and stimulate blood circulation at rest. The walking effect reflected by a sitting person causes preferable reactions of the musculoskeletal system, producing positive effects in prophylactic therapy and rehabilitation of pain disorders and spinal discopathy.

When the seat works in the prophylactic mode, the stroke, speed and frequency of particular movements is small and practically not perceptible for a sitting person in order not to disturb this person’s regular work while sitting but only to gently enforce regular correction of posture.

In case of the operation of the seat in the rehabilitation mode, changes should be adapted to the state of health and program of rehabilitation of a specific patient.

The seat can be provided with a column or legs mounted directly or indirectly to the side guide bar (1) and serve as a standard chair or armchair or be equipped with a backrest or be a standalone device, especially the one intended for rehabilitation. Figures 4 and 5 present the seat according to the second variant.

Figure 4 presents a front view of the seat. The seat consists of a third base (20) provided with the first side guide bar (2 la) on which there is set the first base (22) and then the first vertical unit (23a) and the second vertical unit (23b), the second unit (23b) having the same structure as the first vertical unit (23a). The first base (22) consists of two parts, the first part (22a) and the second part (22b) interconnected with a rod (24). The first couple of front guide bars (25a) is mounted to the first part and the second couple of front guide bars (25b) is mounted to the second part (22b). The first vertical unit (23a) is connected to the third base (20) by means of the side slide unit (26) so that the first vertical unit (23a) and the second vertical unit (23b) can be slid by means of along the first side guide bar (2 la).

The first vertical unit (23a) consists of front guides (27a, 27b) set on the first couple of longitudinal guide bars (25a) and mounted to the second base (28), provided with the first vertical guide bar (29a) along with the first vertical guide (30) set on it to which the first load-carrying plate (32 a) is mounted by means of the first support (3 la). The second load-carrying plate (32b) is mounted to the second vertical unit (23b).

Figure 5 presents a side view of the seat shown on Figure 4. To the third base (20), there are mounted two side guide bars (2 la, 2 lb) on which there is slidingly set the first part (22a) of the second base (22) provided with the first couple of front guide bars (25a). The first vertical unit (23a) is slidingly set on the first couple of front guide bars (25 a) and consists of front guides (27a) mounted to the second base (28). The second base (28) is additionally connected to the first part (22a) by means of the first front slide unit (34). To the second base (28) there is mounted the first vertical guide bar (29a) with the first vertical guide (30a) and the second vertical guide bar (29b) with the second vertical guide (30b), the first load-carrying plate (32a) being mounted to the guides (30a, 30b) by means of the support (31). On the other hand, between the vertical guide bars (29a, 29b) there is the vertical slide unit (35) mounted between the second base (28) and the support (31). The second vertical unit (23b) is connected to the second base (28) by means of the second front slide unit.

Figure 6 presents a front view of the seat according to the third variant. This variant differs from the first variant in that the between the first load- carrying plate (6a) and the support (11) there is the first cylindrical cam (37a) with a vertical rotation axis, driven by a rotational unit (38a). Respectively, the second cylindrical cam (37b) driven by the second rotational unit (38b) is situated under the second load-carrying surface (6b). Both load-carrying surfaces (6a, 6b) are protected against rotation so that they have a capability to deflect from the level by a certain angle.

Figure 7 presents a front view of the seat according to the forth variant. The seat consists of a third base (40) provided with the first side guide bar (4 la) and a second side guide bar, invisible on the figure, on which there is set the first base (42) and then on it the first vertical unit (43a) and the second vertical unit (43b), the second vertical unit (43b) having the same structure as the first vertical unit (43a), and it having the same structure as the first vertical unit (23a) in the seat according to the second variant. The first base (42) consists of two parts, the lower part (44) and the second part (45) lying over it and a cylindrical cam (46) set between them. The cylindrical cam (46) consists of a fixed disc (46a), against the forehead of which there leans the forehead of the movable disc (46b). The movable disc (46b) is pendulously connected to the fixed disc (46a) in the axis of rotation of the movable disc (46b). The fixed disc (46a) of the cylindrical cam (46) is mounted to the lower part (44) whereas the movable disc (46b) adjoins the upper part (45) so that during the rotation of the movable disc (46b) the upper part (45) of the first base (42) deflects from the level in various directions and so do the load-carrying plates (47a, 47b) with it. The movable disc (46b) is rotated against the fixed disc (46a) by means of a rotational unit not shown on the figure and can be tilted aside. There are two couples of front guide bars (48a, 48b) mounted to the upper part (45) of the first base (44), the first vertical unit (43a) being set on the first couple of the front guide bars (48a) and the second vertical unit (48b) being set on the second couple of the front guide bars (48b). Each vertical unit (43a, 43b) is slid along the couples of the front guide bars (48a, 48b) by means of a separate, not shown front slide unit, as is the case in the first variant. In the lower part (44) there are mounted pins (49) which pass through the holes made in the upper part (45), in result of which the upper part (45) does not rotate during the rotation of the movable element (46a) of the cylindrical cam (46) but only tilts aside.

In a special case, the role of the cylindrical cam (46) can be taken by the rehabilitation device known from the application description No PL 42097 Al .