Abstract: A vehicle seat includes a back frame including: a back frame body that is formed by bending a pipe into a rectangular form such that both ends of the pipe are located at one of four corner portions of the rectangular form; and a pair of side frames that are joined, respectively, to a first corner portion which is one of the corner portions of the back frame body and at which the both ends of the pipe are located and a second corner portion that is another of the corner portions of the back frame body and is laterally next to the first corner portion. One of the ends of the pipe is butt-welded to one of the side frames.

Abstract: A pivoting mechanism with gross and fine adjustment with a housing, an elongate shaft pivotally retained by the housing, resiliently deformable members retained by the housing, cam members coupled to the shaft wherein the cam members are disposed to deform the resiliently deformable members when the cam members are pivoted, and a locking slide bar for selectively causing the cam members to pivot with the shaft to produce gross adjustments in pivoting resistance. First and second ends of the shaft can act as an output interface for outputting the pivoting resistance exhibited by the shaft to a seat back structure, a seat bottom structure, or some other structure. A threaded rod rotated by a handle can adjust an initial deformation of the first resiliently deformable member for fine pivoting resistance adjustment.

Abstract: A chair comprising a basic structure, a seat, a backrest, and at least one joint made of plastic material, which connects the backrest to the basic structure, wherein the joint has a first connection portion fixed to or integral with respect to the backrest, and a second connection portion connected to the basic structure, wherein said second connection portion comprises a first and a second arm, which are elongated in a longitudinal direction and are set at a distance from one another in a vertical direction, wherein the first arm has a front portion fixed to the basic structure and is deformable between a resting position corresponding to the resting position of the backrest and a deformed position corresponding to the position where the backrest is tilted backwards, wherein the second arm has a front portion, which is mobile in a longitudinal direction with respect to the basic structure between a first position corresponding to the resting position of the first arm, and a second position corresponding to

Abstract: A fitting (10) for a vehicle seat, in particular for a motor vehicle seat, includes a first fitting part (11) on which a ring gear (17) is formed, a second fitting part (12) on which a gear (16) is formed, the gear meshing with the ring gear (17). The two fitting parts (11, 12) are in a transmission connection with each other. A rotatably supported rotating eccentric (27) drives a relative rolling motion of the gear (16) and of the ring gear (17) and is driven by a carrier forming a driver (21). A bearing (28) for the eccentric (27) is arranged on the edge (12b) of a receptacle (12a) of one of the two fitting parts (11, 12), wherein the edge (12b) of the receptacle (12a) is partially extended along the circumference of the edge by means of individual axial projections (12c).

Abstract: An article of furniture includes a base, a seat frame supported by the base, and a back frame attached to the seat frame. The back frame includes an upper portion and a lower portion. The upper portion is connected to the lower portion by at least one first elastomeric member such that the upper portion is moveable relative to the lower portion. The upper portion is moveable from an upright position to at least one reclined position. In some embodiments of the article of furniture, the at least one first elastomeric member is a strap composed of a polymeric material, such as, for example, a thermoplastic polyester elastomer or a polymeric material containing at least one elastomer. In some embodiments, the article of furniture may be designed as a chair, a lounge chair, or an office chair.

Abstract: An upper portion of the back is pivotable relative to the lower portion between a neutral position and an extended position, with the upper portion being pivotable relative to the lower portion independent of the tilt position of the back. In one aspect, an adjustment mechanism is coupled between lower and upper back support members and pivots the upper support member between at least first and second support positions.

Abstract: A seating structure includes a central spine and an upper back structure having a pair of arms extending upwardly and outwardly from the central spine. The upper back structure is pivotally connected to the central spine about a first horizontal axis. A back support structure is pivotally connected to the spine about a second horizontal axis and is pivotally connected to the ends of each of the arms about a third horizontal axis.

Abstract: A tattoo chair, comprises a backrest (1), a seat (2), a brace (3) for supporting the said seat (2), and a base (4) for allowing the chair to stand stably, the lower end of the said backrest (1) is rotatablely attached to the inner side of the said seat (2); a supporting fixed plate (5) is provided under the bottom surface of the said seat (2); at least one fixed gear rack (10) is mounted from top to bottom on the rear surface of the said backrest (1); a supporting rod (50) is provided on the said supporting fixed plate (5); one end of the said supporting rod (50) is rotatablely attached to the said supporting fixed plate (5), and the other end is put into one of grooves of the said gear rack (10) on the rear surface of the said backrest (1).

Abstract: A locking device for an adjustment fitting of a vehicle seat includes a locking cam rotatable about a first rotational axis and a locking pawl rotatable about a second rotational axis. The locking device is settable into a locking position and a release position. The locking cam comprises one piece having a first locking region and a first safety region. The locking pawl has a second locking region and a second safety region. The first and second locking regions contact one another in the locking position of the device, and the first and second safety regions lie opposite one another or contact one another in the locking position.

Abstract: A rear seat of a vehicle which allows controlled reclining of the seat as well as folding the seatback to a stowed position.

Abstract: A locking device for an adjustment fitting of a vehicle seat has a locking cam rotatable about a first axis, and an actuation element rotatable about a further axis. The locking device has a locking position and a release position. The actuation element has a toothing system and the locking cam has a mating toothing system. The toothing systems have respective opening flanks, at least one of which is flattened to bring about an initially increased opening transmission ratio in comparison to a further course of the toothing systems.

Abstract: The backrest, with a contoured neck and headrest, can be adjusted up and down, and back and forth so that the neck and headrest will fit exactly in the back of the neck and under the head for anyone whether the person is 5 feet tall or 6 feet 5 inches tall. This enables the person to completely relax while watching TV without having to hold his head up. (See illustration #2), and place a beverage on the armrest beverage platform without it tipping over.

Abstract: A vehicle seat is formed by mounting cushion materials on a seat frame having a seat back frame and a seat cushion frame and covering the cushion materials with skin materials. At least one of the seat back frame and the seat cushion frame is provided with a first frame receiving a load of a passenger, and a second frame spaced from the first frame to face the first frame, and peripheral portions of the first frame and peripheral portions of the second frame are at least partially overlapped with each other to form overlapping portions, and fixed and jointed at a position away from the side where the load of the passenger is received.

Abstract: A seat assembly is provided and may include a support member having a first surface, a second surface, and an aperture disposed between the first surface and the second surface. The first surface may be substantially coplanar with the second surface and a recliner mechanism may be received between the first surface and the second surface and may at least partially overlap the aperture.

Abstract: A seat belt-integrated vehicle seat is provided with an improved seat frame rigidity, without a size precision decrease of the entire seat frame. The vehicle seat with a seat belt includes a seat back frame having at least a pair of side frames, and an upper frame for coupling a pair of the side frames on the upper side, a shoulder anchor portion provided in an upper part of the side frame, the shoulder anchor portion into which a shoulder belt portion of the seat belt is inserted, and a reclining device provided in a lower part of the side frame, in which the side frame has a closed section structure portion having a hollow closed section, and an extension portion integrally formed by downwardly extending a surface of the closed section structure portion and positioned on the outer side, and the reclining device is attached to the extension portion.

Abstract: A seat assembly having a seat bottom and a seat back. The seat back includes first and second side members and a cross member. The cross member has an extended portion that extends from the first side member. A bushing is disposed on the extended portion and is received by a hole in the seat bottom to support pivotal movement of the seat back.

Abstract: An internal gear member and an external gear member of a reclining device are axially inserted into a cylindrical interior of a retainer member in order, so that the internal gear member that is inserted first faces a first bottom surface that is formed in an insertion direction side end periphery of the retainer member, and that the external gear member that is inserted later contacts a second bottom surface that is positioned closer to a reception side relative to the first bottom surface. A reception side end periphery of the retainer member is bent radially inwardly, so that the external gear member is integrated with the retainer member. A rear outer surface corresponding to a rear side surface of the first bottom surface of the retainer member has a radial width that corresponds to at least the sum of a radial width of the first bottom surface and a radial width of the second bottom surface.

Abstract: A vehicle seat is provided, particularly for a center seat in a row of seats. The seat includes a back part swivel connected to a seat part so that the back part and seat part swivel away from each other in a seating position and swivel toward one another in a first stowage position. The seat back may be altered in its longitudinal extent between the first stowage position and a second stowage position such that the seat back has a seat length and a shorter stowage length. The seat further includes a traveling mechanism which automatically moves the back part longitudinally from the seat length to the shorter stowage length when the back part is folded into the first stowage position.

Abstract: A vehicle seat frame assembly 10 includes a seat bottom frame 14 and a seat back frame 12 pivotally mounted relative to the seat bottom frame 14. A headrest assembly 47 has a headrest 76 and is movable between an extended position and a retracted position relative to the seat back frame 12. The headrest assembly 47 is pivotally connected to the one of the seat bottom frame 14 and a portion of the vehicle, and slidingly connected to the seat back frame 12.

Abstract: A surgeon chair system includes a support structure and multiple adjustable components connected thereto that support a seated human body while leaning forward to perform a task. The surgeon chair system may include an adjustable support structure, an adjustable seat, an adjustable chest rest, at least one adjustable arm rest, an adjustable back rest, an adjustable head rest, and an adjustable foot rest, with a controller for adjusting one or more of the adjustable components.

Abstract: Attachment mechanisms are provided that may be riveted on one end and welded on another flanged end. The flanges may allow the rivets to be welded to a frame or other part without additional support plates. In certain embodiments, the rivets may simplify manufacturing and packaging as well as reduce the weight of the attachment mechanism. The attachment mechanisms may promote load distribution, allow for the use of thinner materials, facilitate attachment to heat treated materials, allow for attachment of parts that are difficult to access, reduce fixturing, and improve manufacturing efficiency, among other things.

Abstract: A combination pivoting armrest and seatback assembly incorporated into a vehicle including a base secured to the vehicle and exhibiting an extending edge profile. A sector is pivotally secured to the base, with a first cam pivotally secured to the sector and contacting a first edge location of the base when the sector is in an upright position. A second cam is also pivotally secured to the sector in inter-engaging fashion with the first cam such that, upon the first cam being rotated out of contact with the base and the sector rotating to a forward dump position, the second cam subsequently contacts a second edge location of the base.

Abstract: An adjustment device for chairs, comprising a main body (2), which can be engaged onto a supporting shank (3) of a chair; a prop element (6) mounted above the main body (2), which can be associated to a seat for a user; a backrest (10) mounted onto the main body (2), which can be associated to a back (11) for a user; and articulation means (14) for movably engaging the backrest (10) and the prop element (6) to the main body (2), the articulation means (14) comprise at least one lever (17) pivoting around the main body (2) in a first mounting site and having at least two lever portions (17a, 17b) hinged to the prop element (6) in a second mounting site and to the backrest (10) in a third mounting site, respectively, so as to obtain a given movement relation between the backrest (10) and the prop element (6).

Abstract: A seat frame reinforcement structure has a reinforcing member that is provided between both side frames that constitute a framework of a seatback of a vehicle seat, is connected to the side frames, and extends in the width direction of the vehicle seat. The reinforcing member includes a rod that is larger in diameter than each of operation pins that pass through center portions of reclining mechanisms, bushings that are connected to respective end portions of the rod, and a guide member that is connected integrally to the side frame so as to surround the outer periphery of a portion of the operation pin, which is exposed due to a clearance formed between an end portion of one of the bushings and the side frame. Due to the provision of the guide member, the diameter of the reinforcing member is maintained large even in a region where there is the clearance.

Abstract: A molded plastic seat back assembly for a vehicle including at least two polymeric vertical support members including a top portion, a center portion, and a lower portion, wherein at least a portion of the polymeric vertical support members have a alternating wall section portion including a front wall section, a connective middle wall section and a back wall section; at least one cross-seat member connectively disposed between the polymeric vertical support members; at least one recliner bracket connectively disposed to the lower portion of the polymeric vertical support members for anchoring the molded plastic seat back assembly to a seat back recliner assembly; and at least one strap reinforcement member.

Abstract: A universal reclining armrest system for use with an articulated examination chair. The system includes an armrest adapter having a universal aperture for receiving a post portion of an armrest assembly. The armrest adapter further includes a splined peg for coupling to a pivoting mechanism of an articulated chair. The pivoting mechanism enables the chair to move throughout an operable range of motion while maintaining a fixed rotational position of an attached armrest adapter. The armrest assembly further includes an adjustable joint to provide 360° of rotational adjustment to the armrest relative to the fixed position of the armrest adapter.

Abstract: An aircraft seat includes a seat bottom frame, a seat translation and rotation mechanism attached to the seat bottom frame allowing translation and rotational movement of the seat bottom frame. An armrest is removably attached to the side of the seat bottom frame, and can be set to different positions relative to the seat bottom. The armrest has a seat control mounted to an outside of the armrest, and an input transfer mechanism disposed inside the armrest. The input transfer mechanism has an end engaged to the seat control, and a receiver end. The input transfer mechanism is cable-less. A couple shaft is engaged with the receiver end and engaged with the seat translation and rotation mechanism. When the seat control is actuated, the input transfer mechanism causes the seat translation and rotation mechanism to allow the seat bottom frame to at least one of translate and rotate.

Abstract: A vehicle seat includes an operating member that is provided for a seat back. The operating member is operated to release locking of a seat cushion to a floor and to release rotation-sopped state of a reclining device. By operating the operating member, a first link rotatably provided for the seat back is operated in one rotation direction to thereby turn a second link rotatably provided for a base frame so that locking of the seat cushion to the floor is released. When the seat back is tilted forward, the first link is moved together with the seat back in a direction to be separated from the second link, that is, in a direction opposite to a direction in which the first link turns the second link.

Abstract: A vehicle seat has a backrest that includes a user support surface and a structural part. The user support surface is configured to be adjusted at least partially relative to the structural part to a first position corresponding to a use position and to a second position corresponding to a stowage position. First and second partial surfaces of the backrest may be separately displaceable.

Abstract: An electronic switch for controlling a motor. The switch includes at least one deflectable resistor including a substrate having a first configuration. The substrate being bendable to a second configuration relative to the first configuration. A layer of conductive material is disposed on a surface of the substrate, wherein the layer of conductive material having a resistance that changes predictably when an electrical signal is applied thereto. The change of resistance of the layer of conductive material reflects an amount of deflection between the first configuration and the second configuration and for various configurations in between. A motor assembly is coupled to the at least one deflectable resistor. The deflectable resistor, when positioned in the first configuration turns off the motor assembly. Also, the deflectable resistor when bent towards the second configuration and away from the first configuration turns on the motor assembly.

Abstract: A chair or seat comprising seat back (11) and seat bottom (10) is provided with one or more self inflatable devices (12) inserted therein. Each inflatable device comprises a flexible, open celled foam filled bladder connected to a control valve (13), and optionally, a bleed valve (27). Control and bleed valves can either be incorporated into the seat back or seat bottom or they can be provided in a remote panel (30) for operating the degree of inflation of the self inflatable devices. The control valves and bleed valves may be manually valves, or they may be electric valves incorporating solenoids. Electric valves can be used in combination with vehicle's electrical and central locking systems to provide for the automatic reinflation and preservation of personal settings.

Abstract: A tilt control mechanism for an office chair includes a spring assembly therein which controls the tilt tension on the back assembly. The tilt control mechanism includes a control plate mounted to the control shaft on which the uprights are mounted, wherein the control plate rotates in combination with the uprights. This control plate is located within the control body and cooperates with a front stop assembly and a back stop assembly to vary the limits of forward and rearward tilting of the seat and back assemblies. Also, the tilt control mechanism includes a pneumatic actuator assembly having fixed and rotatable cam blocks. The rotatable cam block rotates relative to the fixed block such that the rotatable cam block is driven downwardly to depress the control valve of the pneumatic cylinder and thereby vary the height of the seat assembly.

Abstract: A vehicle seat (10) includes an 2 improved seat frame member (14) used as a seat back, a recliner mechanism connection (16) and a vehicle seat track actuator mechanism (18). The seat back frame member (14) includes a side frame member (30) having a side frame structural member (32) preferably made from a relatively high strength steel and a stiffening insert member (42) to provide strength and rigidity to the recliner mechanism connection (16) and to reduce the overall mass of the vehicle seat frame member and thereby the vehicle seat (10). The seat frame member (14) further includes a recliner mechanism (34) welded to the side frame structural member (32) preferably utilizing a shaped laser weld pattern (40). The vehicle seat track actuator mechanism (18) includes a bar (56), first and second pivot pins (62, 64) and connectors (70).

Abstract: A recliner assembly includes a seat portion, an arm, and a backrest portion having an arm support. The backrest portion is connected to the seat portion at a first pivot, wherein the backrest portion is pivotable relative to the seat portion between a forward position and a backward position. At least one linkage member is provided, and it has a first and a second end. The first end is pivotably connected to the seat portion at a second pivot, and the second end carries a cross pin for slidable engagement in a path formed in the arm support. The arm includes a pin at one end. The arm pin has at least one perpendicular dowel, and the arm is connected to the arm support at the second end to define an area of rotation so that upon simultaneous rotation of the back portion and the straddle floating bar about their respective pivots the arm experiences vertical displacement, but substantially no angular displacement when the backrest is moved between the forward and the backward positions.

Abstract: A seat assembly for a vehicle includes a seat bottom and a seatback. The seatback includes a seatback frame and is selectively rotatable relative to the seat bottom from an upright position to a forward position. A seatbelt assembly includes a retractor coupled to the seatback frame and a belt selectively extendable from and retractable to the retractor. A first end of the belt is disposed in the retractor. A guide is coupled to the seatback frame and defines an orifice with the belt slideably extending through the orifice. The retractor and the guide are fixed relative to the seatback frame and the second end of the belt is fixed to the seatback frame. The retractor, the guide, and both ends of the belt rotate from the upright position to the forward position in response to a force exerted on the seatback frame during rapid deceleration of the seat assembly.

Abstract: An arrangement for a vehicle seat includes an inner element (11c, 11d), an outer element (9, 16a), which has an opening (16b) having an edge (9c, 16c) and receives the inner element (11c, 11d), and a weld seam (20) which connects the outer element (9, 16a) to the inner element (11c, 11d). The edge (16c) of the opening of the outer element (9, 16a) is interspaced from the inner element (11c, 11d) over the largest part of its circumference and defines a radial gap (G) having a defined maximum width, the weld seam (20) being introduced into the gap (G).

Abstract: Various embodiments of the present invention provide seating devices having an armrest with a triangular cross-section that twists along its length to provide a support surface with increased comfort to the occupant, in addition to making the chair strong and durable. The seating device of the present invention may also be stackable.

Abstract: A vehicle seat, such as a rear bench seat, includes a seat part, a backrest part and a fitting part. The backrest part and the fitting part are pivotable relative to the vehicle body about a first rotational axis. The first rotational axis is disposed below the seat part or behind the backrest part.

Abstract: In the case of a transmission device (5) for a vehicle seat (1), in particular a motor vehicle seat, with at least one hub (7, 27, 27?, 27?) and a shaft (10) which interact in a form-fitting manner in order to transmit a torque, wherein the shaft (10) has a profile with m teeth (12) and the hub (7, 27, 27?, 27?) has a profile with a central opening with n receptacles (15, 15?), and wherein each receptacle (15, 15?) is designed for interaction with a tooth (12), the hub (7, 27, 27?, 27?) has n=2m receptacles (15, 15?) or n=2m?1 receptacles (15, 15?).

Abstract: Angle adjustable backrest made of a lightweight, durable, adjustable, backrest for ultralight manual wheelchairs. Light-weight material can include composites for a rigid backrest for promotion of healthier and functional interface. Angle adjustment can be any desired range such as a range from ?5 degree to 55 degrees (i.e. 85 degrees to 145 degree with respect to horizontal with the seat). No tools are necessary for any of the angle adjustments. The backrest has a horizontal adjustment (fore-aft) that can be any desired range such as 1 inch. The height selection depends on the length of the wheelchair frame tubes. The present invention improves the ease and simplicity of adjusting the backrest by or for the user, as well as enhances the aesthetic appearance and adds features necessary for achieving commercial readiness. The present invention can be retro fit onto a wide range for ultralight wheelchairs.

Abstract: A wheelchair accessible recliner is disclosed. In a particular embodiment, the recliner includes a backrest disposed at the rear portion of the recliner and configured to support a torso and back area of a user. A front base member serves to act as a wheel chock to secure rear wheels of the wheelchair within the recliner so that the user can tilt back in his or her wheelchair to stretch and relax. The backrest is adjustable and supported by a back strut. The back strut may be adjusted manually to adjust the angle of the backrest or can be adjusted by an actuator. Armrests are disposed on each side of the recliner and configured to support arms of the user when the wheelchair is positioned within the recliner.

Abstract: A chair, includes a seat structure and a backrest structure arranged pivotally to the seat structure. An armrest is arranged pivotally to the backrest structure through a pivotal connection, and a link mechanism is journalled to the structures of the seat and the backrest, respectively, the link mechanism actuating and controlling the armrest to maintain its pivotal orientation in any pivotal position of the backrest relative to the seat. The armrest is adjustable in the length direction of the backrest through the pivotal connection which is arranged displaceable on the backrest structure, and the pivotal orientation of the armrest is controlled via a sliding engagement between a lever arm, adjoining the armrest at an angle thereto, and an actuator link included in the link mechanism and displaceable thereby with respect to the backrest so as to extend substantially in the length direction of the backrest in all its positions of displacement.

Abstract: A hunting chair with a hunting blind attachment that encircles the chair is disclosed, as well as an attachable camouflage roof covering, all of which may be folded and disassembled in such a way that it fits into a self-contained pack that may be carried on a hunter's back. The chair includes an adjustable, pivoting backrest, a pivoting gun rest with telescoping legs for height adjustment, folding legs, a pouch to contain the disassembled elements, and shoulder straps for carrying the apparatus. In its disassembled state, the roof poles, roof fabric, and blind fabric are packed into a pouch on the back side of the backrest, and the chair is folded into a carrying position. Detachable shoulder straps may be attached to the underside of the seat section, so that the entire chair and blind combination may be carried on a hunter's back into the field.

Abstract: A headrest for an automobile seat has a headrest body and an attachment member to be attached to a back of the seat to allow the headrest body to be moved up and down with respect to the seat back in a standing posture, while allowing the headrest body to be rotated about a pivot shaft to move a lower end of the headrest body in a frontward-rearward direction of the automobile. The headrest body has an expanded rear portion thereof to expand rearwardly and configured so that a distance between the surface of the expanded portion and the pivot shaft gradually decreases toward an upper edge of the expanded portion. The expanded portion is opposed to an upper surface of the seat back in the standing posture and contacts the upper surface when the attachment member is moved down.

Abstract: A portable folding seat including a back support, a seat portion and a pair of laterally-spaced mounting assemblies extending between and operatively connecting the back support to the seat portion so as to allow reciprocal rotational movement of the back support with respect to the seat portion between a carrying mode wherein the back support is positioned over and adjacent to the seat portion and a storage mode wherein the back support is positioned adjacent to and coplanar with the seat portion and from a storage mode to a seating mode wherein the back support is disposed at an angular orientation with respect to the seat portion and the mounting assemblies support the back support in selectively variable angles of rearward inclination in the seating mode.

Abstract: In a vehicle seat that includes a seat cushion, a seatback that is rotatably attached to the seat cushion, and a spring that urges the seatback to a raised upright position from a reclined position in which the seatback is tilted back behind the seat cushion, the spring is spiral shaped, with a center-side end portion that is arranged near the rotational center of the seatback hooked on a seatback-connected member and an outside end portion that is positioned on the outer peripheral side of the spring hooked on a seat cushion-connected member. A shield member that covers the spring is attached to the seat cushion.

Abstract: The present embodiments provide an integrated patient room having multiple features designed to enhance the safety, satisfaction and/or outcomes for a patient and/or caregiver. In one embodiment, the integrated patient room comprises at least one bed and at least one chair. The bed and the chair can each assume a wide range of positions, and can be pre-programmed into preferred positions. Further, the bed, chair, and/or other components in the patient room may be automatically synchronized with one another to facilitate transfer of a patient. A touch screen monitor with an intuitive graphical user interface may be employed as a communication portal. The functions of the bed, chair and/or other components in the room may be accessed and/or controlled through the communication portal.

Abstract: A vehicle seat includes a seat part and a partitioned back rest. The back rest has a first segment and a second segment. The segments are each equipped with an inclination adjuster. The adjusters include means for limiting the inclination of one segment relative to the other.

Abstract: The present invention relates to an actuating device (1) having a drive part (2) moving an output part (5) from an initial position into a final position, wherein the output part (5), or the drive part (2), has a first region (9) and a second region (10), and the drive part (2), or the output part (5), interacts with the two regions (9, 10) such that the position of the output part (5) is changed during an interaction with the first region (9), and an interaction with the second region (10) prevents a return movement of the output part (5) into the initial position. The present invention further relates to a vehicle seat comprising the actuating device (1) according to the invention.

Abstract: A seat for amusement apparatus, unusually suitable for allowing the user to adopt a new position on the apparatus, comprising a support and means for immobilising the user on the support. The immobilising means comprise at least one support in front of the user and opposing means suitable for acting on the user's back. The opposing means comprises an arm which can move between a lowered position in which the user can sit down on the support and a raised position in which one end of the arm abuts against the user's back.