A multi-position seat configured to maximize usability thereof through various changes in the positions of a seat back and a seat cushion may include a height assembly configured to move a base frame mounted on a vehicle body, a slide assembly configured to move a seat cushion frame, which is positioned above the base frame and is connected to the base frame via a link mechanism, upwards and downwards by sliding action of the link mechanism in a forward and backward direction, a tilt assembly configured to move a rear end portion of the seat cushion frame upwards and downwards, and a seat back frame hingedly coupled to a rear end portion of the base frame to be reclined.

A seat position adjusting device for a vehicle may integrate a seatback reclining mechanism and a mechanism for realizing a comfort relaxation posture into one simplified mechanism. The seat position adjusting device includes: a seatback frame and a seat cushion frame connected to each other at a predetermined seating angle; a fixed rail mounted on a bottom surface of a rear end portion of the seat cushion frame to be inclined upward and forward; a moving rail mounted to the fixed rail to be movable forward and backward; a pair of support frames mounted on a floor panel; a front link hinge-coupled between a bottom surface of a front end portion of the seat cushion frame and a front end portion of an associated one of the support frames; and one or more support links hinge-coupled between the moving rail and the associated one of the support frames.

A moving and locking device for a vehicle seat includes: a lower frame mounted on a bottom surface of a seat cushion; a plurality of wheels disposed underneath the lower frame in such a manner that the plurality of wheels roll on a floor panel; and a vacuum adsorption device disposed inside the lower frame and configured to be adsorbed on the floor panel by vacuum force. The vehicle seat is configured to be moved to the desired position through the rolling motion of the plurality of wheels, and configured to be locked at the desired position through vacuum adsorption of the vacuum adsorption device on the floor panel.

A conveyance seat includes: a seat back; a seat cushion which includes a pair of cushion side frames extending in a front to back direction of the seat; a slide rail which slides the seat back and the seat cushion in the front to back direction of the seat; a connecting member connecting the seat cushion and the slide rail; and a first rotation portion which-rotatably connects the connecting member to the slide rail, the seat cushion is movable from a first height position to a second height position below the first height position in an up and down direction of the seat, and when the seat cushion moves to the second height position, the first rotation portion is disposed at the same height position as the slide rail in a side view of the conveyance seat to suppress an increase in size of the seat.

A vehicle seat having a drive device for driving a adjustment kinematics of the vehicle seat may have an adjustment arm, and a tensioning device. The drive device may have a pinion which can be rotated about a pinion rotation axis and which is in toothed engagement with a tooth segment of the adjustment arm. The tensioning device pretensions the adjustment arm so that the tooth segment is pretensioned in the direction of the pinion. The tensioning device has at least one sliding element which is in abutment with the adjustment arm. During an actuation of the height adjustment kinematics, the at least one sliding element slides along the adjustment arm. The sliding element is resiliently pretensioned by a resilient element.

A lifter device includes: a pinion gear; a rotation control device including: a rotation shaft rotating in synchronization with the pinion gear; a support member supporting the rotation shaft; a rotation drive mechanism configured to rotate the rotation shaft; and a lock mechanism configured to lock rotation of the rotation shaft when an operation handle is in an operation-released state and including: a first tooth; and a second tooth configured to selectively mesh with the first tooth to lock relative rotation of the rotation shaft and the support member; and a speed increasing mechanism provided closer to the rotation shaft than a meshing portion of the first tooth and the second tooth in a rotation transmission path, configured to transmit the rotation of the rotation shaft to one of the first tooth and the second tooth, and configured to speed up the transmitted rotation of the rotation shaft.

A conveyance seat includes: a seat back; a seat cushion which includes a pair of cushion side frames extending in a front to back direction of the seat; a slide rail which slides the seat back and the seat cushion in the front to back direction of the seat; a connecting member connecting the seat cushion and the slide rail; and a first rotation portion which-rotatably connects the connecting member to the slide rail, the seat cushion is movable from a first height position to a second height position below the first height position in an up and down direction of the seat, and when the seat cushion moves to the second height position, the first rotation portion is disposed at the same height position as the slide rail in a side view of the conveyance seat to suppress an increase in size of the seat.

Various vehicle seat improvements are enabled herein. For instance, a kinematic seat for a vehicle comprises a seat base connected to the vehicle. A first side member is affixed to a base at a first side of the base. A second side member is affixed to the base at a second side of the base, opposite the first side of the base. A slider is slidably received in the base. A seat back assembly is rotatably coupled to the first side member and rotatably coupled to the second side member. A linkage is rotatably coupled to the seat back assembly and rotatably coupled to the slider, whereby sliding of the slider rotates the seat back assembly. A first lower seat lifting mechanism comprises a lifting bracket, wherein the lifting bracket is rotatably coupled to the first side member at a first end of the lifting bracket, and wherein the lifting bracket is slidably received in a channel of the first side member at a second end of the lifting bracket. A second lower seat lifting mechanism comprises a bracket rotatably coupled to the base and a link arm rotatably coupled to the bracket and rotatably coupled to the slider.

A vehicle seat comprises: a seat base; a first side member is affixed to a base at a first side of the base; a second side member is affixed to the base at a second side of the base, opposite the first side of the base; a slider slidably received in the base; a seat back assembly is rotatably coupled to the first side member and rotatably coupled to the second side member; a linkage rotatably coupled to the seat back assembly and rotatably coupled to the slider; a first lower seat lifting mechanism comprising a lifting bracket, wherein the lifting bracket is rotatably coupled to the first side member at a first end of the lifting bracket; and a second lower seat lifting mechanism comprising a bracket rotatably coupled to the base and a link arm rotatably coupled to the bracket and rotatably coupled to the slider.

A seat support assembly has a lower member with a first channel extending in a front-back direction of the seat support assembly and an upper member positioned above the lower member and having a second channel extending in the front-back direction. A first linkage has a lower end pivotably coupled to the lower member and translatable in the front-back direction by way of the first channel and an upper end pivotably coupled to the upper member. A second linkage has a lower end pivotably coupled to the lower member and an upper end pivotably coupled to the upper member and translatable in the front-back direction by way of the second channel. The first and second channels are offset from one another in the front-back direction.