A wheelchair having a tiltable occupant-support assembly, a powered drive system for adjusting the degree of tilt, and a control system for varying the degree of tilt in a programmatic automated fashion. The wheelchair is programmed or programmable to vary the degree of tilt, and therefore the wheelchair's occupant, automatedly. The wheelchair may provide pre-set ranges of seating angles and durations of time at each angle of tilt. The wheelchair thereby allows for reliable off-loading of the occupant's weight from pressure points, to avoid pressure ulcers, and does so programmatically so as to reduce the burden on healthcare staff and professionals while also ensuring adherence with prescribed tilting schedules.

In one or more arrangements, as examples, a reclining chair is presented having a frame, a seat operably connected to the frame, a backrest operably connected to the frame, and a cartridge operably connected to the frame. In one or more arrangements, as examples, the backrest includes an upper axle and the cartridge having a link. In one or more arrangements, as examples, the cartridge is configured to connect to the upper axle of the backrest and wherein the link is configured to facilitate movement of the backrest between an upright position and a reclined position.

In one or more arrangements, as examples, a reclining chair is presented having a frame, a seat operably connected to the frame, a backrest operably connected to the frame, and a cartridge operably connected to the frame. In one or more arrangements, as examples, the backrest includes an upper axle and the cartridge having a link. In one or more arrangements, as examples, the cartridge is configured to connect to the upper axle of the backrest and wherein the link is configured to facilitate movement of the backrest between an upright position and a reclined position.

The collapsible lovemaking apparatus has an elongated housing having opposing ends. A floor, a top platform, opposing sidewalls, and a rigidly fixed end wall having a handle form the housing and define a hollow interior. A chair platform is slidably mounted on telescoping tubes attached to the floor, the platform being slidable out of the open housing end and supported at one end by wheels. An adjustable height pedestal chair is mounted on the platform, the chair back being rotatable 180 to define an end wall closing the open end of the housing. A second chair seat having a reclining chair back is mounted on a trolley on the top platform facing the adjustable height chair, the reclining back being collapsible to a flat position. The pedestal chair and the trolley-mounted chair seat may roll towards and away from each other to facilitate love making.

The collapsible lovemaking apparatus has an elongated housing having opposing ends. A floor, a top platform, opposing sidewalls, and a rigidly fixed end wall having a handle form the housing and define a hollow interior. A chair platform is slidably mounted on telescoping tubes attached to the floor, the platform being slidable out of the open housing end and supported at one end by wheels. An adjustable height pedestal chair is mounted on the platform, the chair back being rotatable 180 to define an end wall closing the open end of the housing. A second chair seat having a reclining chair back is mounted on a trolley on the top platform facing the adjustable height chair, the reclining back being collapsible to a flat position. The pedestal chair and the trolley-mounted chair seat may roll towards and away from each other to facilitate love making.

A structure in which two worm wheels are disposed across a worm provides an increase in locking reliability while maintaining stable operation during rotation. At the time of rotation, respective rotating fulcrums set at both end portions in an axial direction of a worm are supported by bearing parts. At the time of locking, a locking fulcrum set at an eccentric position on one end portion in the axial direction of the worm is supported by one bearing part, while on the other end portion in the axial direction, the rotating fulcrum is supported by the other bearing part as is. As a result, the angle of lead of the worm supported by the pair of bearing parts is changed between the time of rotation and the time of locking and becomes smaller at the time of locking than at the time of rotation, whereby an increase in locking reliability can be achieved.

A structure in which two worm wheels are disposed across a worm provides an increase in locking reliability while maintaining stable operation during rotation. At the time of rotation, respective rotating fulcrums set at both end portions in an axial direction of a worm are supported by bearing parts. At the time of locking, a locking fulcrum set at an eccentric position on one end portion in the axial direction of the worm is supported by one bearing part, while on the other end portion in the axial direction, the rotating fulcrum is supported by the other bearing part as is. As a result, the angle of lead of the worm supported by the pair of bearing parts is changed between the time of rotation and the time of locking and becomes smaller at the time of locking than at the time of rotation, whereby an increase in locking reliability can be achieved.

A chair having an adjustable backrest and control actuator disposed forward of the backrest hinge, for controlling the backrest angle. The chair has a backrest support hinged to the backrest away from the backrest/chair hinge, and coupled directly or indirectly to track runners which run along elongated support tracks. A positioner is controlled by the control actuator and coupled to the backrest support and track runners, limiting the extent to which the track runners may move along the support tracks and thus control the angle of the backrest.

A seat reclining device includes: a first gear member; a second gear member; paired wedge members arranged in an eccentric space; a biasing member which biases the paired wedge members in directions away from each other; and a drive member. The drive member includes a first drive protrusion which is arranged in a small-width portion of the eccentric space and a second drive protrusion which is arranged in a large-width portion of the eccentric space. When the drive member rotates the paired wedge members, counterforce acting on a shaft portion of the drive member against first pressing force generated by the first drive protrusion pressing one of the paired wedge members and second pressing force generated by the second drive protrusion pressing the other one of the paired wedge members pushes a boss portion of the first gear member in a direction toward the one wedge member.

A seat reclining device includes: a first gear member; a second gear member; paired wedge members arranged in an eccentric space; a biasing member which biases the paired wedge members in directions away from each other; and a drive member. The drive member includes a first drive protrusion which is arranged in a small-width portion of the eccentric space and a second drive protrusion which is arranged in a large-width portion of the eccentric space. When the drive member rotates the paired wedge members, counterforce acting on a shaft portion of the drive member against first pressing force generated by the first drive protrusion pressing one of the paired wedge members and second pressing force generated by the second drive protrusion pressing the other one of the paired wedge members pushes a boss portion of the first gear member in a direction toward the one wedge member.