A brake device comprises a brake mechanism which comprises an output shaft having a drive gear secured thereto, a brake housing having a cylindrical braking surface therein and coaxially putting therein the output shaft, two pairs of clamp members movably and abreast installed in the brake housing in such a manner that paired two clamp members of each pair put therebetween an enlarged operation part of the output shaft and two springs that bias the two clamp member of each pair to pivot away from each other, in which each of the clamp members has an outer clamp surface that is slidably contactable with the cylindrical braking surface and includes larger and smaller clamp surface areas that are spaced from each other by a recess.

A seat assembly forming a substantially horizontal plane for an exposed surface of each of a lower seat cushion and a seatback cushion of a seatback comprises a lifter mechanism for a rearward edge of the lower seat cushion. The lifter mechanism comprises a bracket pivotable about a transverse bar fixedly mounted to a frame assembly for a lower seat assembly, the bracket comprising a forward lever and a rearward lever; and a link pinned at a first end to the seatback and pinned at a second end to the rearward lever by a slot. The rearward edge of the lower seat cushion is initially raised by the forward lever upon the seatback pivoting to a predetermined reclined position and the rearward edge of the lower seat cushion is raised to the substantially horizontal plane upon the seatback pivoting to a fully reclined position.

A seat assembly forming a substantially horizontal plane for an exposed surface of each of a lower seat cushion and a seatback cushion of a seatback comprises a lifter mechanism for a rearward edge of the lower seat cushion. The lifter mechanism comprises a bracket pivotable about a transverse bar fixedly mounted to a frame assembly for a lower seat assembly, the bracket comprising a forward lever and a rearward lever; and a link pinned at a first end to the seatback and pinned at a second end to the rearward lever by a slot. The rearward edge of the lower seat cushion is initially raised by the forward lever upon the seatback pivoting to a predetermined reclined position and the rearward edge of the lower seat cushion is raised to the substantially horizontal plane upon the seatback pivoting to a fully reclined position.

A seat lifter structure which can maintain the engagement of the gear of the sector and the pinion of the brake unit and prevent a fall down of the seat back to a front side, even when a large force to a front side is exerted with respect to the seat back is provided. It raises or lowers a cushion seat (ST1) by raising or lowering a side frame (2) built into the cushion seat (ST1) with respect to a fixing member (61). It is equipped with a brake unit (8) having a pinion (8b) and attached to the side frame (2); a sector (7) supported to be rotatable with respect to the fixing member (61) by a first support portion (7b1), supported to be rotatable with respect to the side frame (2) via a second support portion (7k2), having a gear portion (7a) to be engaged with the pinion (8b) and provided in parallel and facing with respect to the side frame (2); and a spacer (10) having a first surface (10kb) facing with the side frame (2) and a second surface (10ka) facing with the sector (7), which is installed between the side frame (2) and the sector (7).

A vehicle control system includes a driving controller that switches between autonomous driving an manual driving of a vehicle, a seat whose form is changed between a form during autonomous driving and a form during manual driving that are different from each other, and a seat controller that controls motion of the seat when a form of the seat is changed. If the seat is in a form during autonomous driving, the driving controller does not switch autonomous driving to manual driving when controlling the vehicle.

A device for adjusting a seat of a vehicle is capable of implementing functions including adjusting a position of the seat back and forth, a height of the seat up and down, and tilting or the like by using a plurality of actuators having pistons. The functions of adjusting the position of the seat back and forth, the height of the seat up and down, and tilting or the like are carried out by providing connections between a floor panel and a seat cushion frame through a plurality of actuators and a single link, and selectively moving a piston of each actuator back and forth.

A vehicle seat includes a seating portion and a seat shell coupled to the seat portion to swivel. The seat shell is coupled to the seating portion by a fastener.

Provided is a conveyance seat including a pelvis support member of which a state or the like is adjusted. The conveyance seat includes the pelvis support member configured to support a portion of an occupant's body where a pelvis is positioned and lumbar supports configured to move the pelvis support member. The pelvis support member includes a seat back side support portion positioned behind a back portion of the occupant, a seat cushion side support portion positioned below buttocks of the occupant, and a connection portion that connects the seat back side support portion and the seat cushion side support portion. The lumbar supports are configured to move the pelvis support member so that a position of at least one of the seat back side support portion, the seat cushion side support portion, and the connection portion is changed with respect to the portion where the pelvis is positioned.

Disclosed is a seat adjustment apparatus for a mobility vehicle, in which a seat cushion slides in a forward/rearward direction while moving upward or downward when the seat cushion is tilted, thereby allowing an occupant to take a stable posture. In one aspect, the seat apparatus comprises 1) a fixing bracket fixed to a floor surface; 2) a setting bracket disposed above the fixing bracket and connected to a back frame so that the back frame is rotatable; 3) a guide unit disposed at a front end of the fixing bracket and a front end of the setting bracket; 4) a guide part disposed at a rear end of the fixing bracket and a rear end of the setting bracket; and 5) a drive unit connected to the guide unit.

Disclosed is one example of a vehicle seat that can inhibit a large displacement of a cushion frame along a seat-width axis. The vehicle seat includes a cushion frame; a bracket coupled to a vehicle body; a lifter link that couples the cushion frame to the bracket and supports the cushion frame; and a first restrictor included in the bracket. The bracket is configured to couple the cushion frame to the vehicle body. The lifter link is pivotable along a front-rear axis of the seat with an upper end of the lifter link being pivotably coupled to the cushion frame and a lower end of the lifter link being pivotably coupled to the bracket. The first restrictor restricts a displacement of the lifter link along the seat-width axis in response to an abutment of the first restrictor against a first abutting portion included in the lifter link.