A power seat slide device capable of changing not only to an electric operation but also to an manual operation, and preventing half-lock in spite of a manually operable structure. For front-rear movement, a rack attached to a lower rail and a pinion meshed with the rack are used, and a driving force of a motor is transmitted to the pinion, which enables the use in an electric mode. As no slide screw is used, while the motor is not energized, rotating the pinion causes an output shaft of the motor to rotate, so that manual adjustment becomes possible.

A connecting element (3) for adjusting the height of a vehicle seat (1) includes an angular element (3.1) with a first leg (3.1.1) having a seat part side receiving opening (3.1.5) and an opposite rail side end receiving opening (3.1.4), and a second leg (3.1.2) angled relative to the first leg (3.1.1) and a tooth element (3.2). The seat part receiving opening (3.1.5) is situated in a connection area of the first leg (3.1.1) and of the second leg (3.1.2). The tooth element (3.2) has a first section (3.2.1) configured as a circular arc with toothing (V2) that is connected at an end side to the second leg (3.1.2) and a second section (3.2.2) that is angled from the first section (3.2.1) in the direction of the receiving opening (3.1.5) on the side of the seat part and is connected to the first leg (3.1.1) at the end side.

A pumping device is disclosed for a vehicle seat, including a clutch means for receiving rotational force from the outside and transferring power to a link means of a seat cushion. The clutch means includes a clutch block rotated by the rotational force transferred from the outside, a clutch drum which is provided with the clutch block in an inside space and transfers the power to the link means of the seat cushion while rotating by the rotational force transferred from the clutch block, and a plurality of fitting pieces interposed between an outer peripheral surface of the clutch block and an inner peripheral surface of the clutch drum and transferring the rotational force of the clutch block to the clutch drum. The clutch block has a protrusion portion protruding radially from the outer peripheral surface and thus stress concentration is not generated on the plurality of fitting pieces.

Realized is a vehicle seat capable of improving the rigidity of a cushion frame with respect to a load input to a seat back while suppressing an increase in weight and size of the cushion frame. In a vehicle seat including a height adjustment mechanism which is driven to adjust the height of a seat cushion and a brake mechanism which maintains the height of the seat cushion when the height adjustment mechanism is not driven, the brake mechanism is connected to a second connection portion different from a first connection portion connected to the seat back in the cushion frame, and reinforcement portions and which extend in a direction from the first connection portion toward the second connection portion are provided between the first connection portion and the second connection portion in the cushion frame.

A seat support mechanism including a lifter, and configured to perform a cushion frame suspension function no matter to what height a cushion frame is adjusted. Torsion bars extending in the width direction of a cushion frame and elastically supporting the cushion frame are supported by a link mechanism disposed between sliders and the cushion frame. Even if the attitude of the link mechanism is displaced when the lifter adjusts the height, the positions of the torsion bars are displaced so as to follow the displacement. The torsion bars elastically support the cushion frame no matter to what height the torsion bars are displaced. Thus, no matter to what height the cushion frame is adjusted, the torsion bars are able to support the cushion frame with predetermined elasticity and to exhibit predetermined vibration absorption characteristics.

A vehicle seat (1) having adjustment kinematics, in particular height-adjustment kinematics (6), with movable rockers (12, 14), in particular for adjusting the height of a seat frame of the vehicle seat (1) relative to a connectable vehicle structure, wherein at least one rocker (14) is mounted rotatably about an axis (A), in particular about an axis (A) of a transverse tube (16), and a toothed segment (18) which is connected to the at least one rocker (14) is provided, wherein the vehicle seat (1) has a drive (20) for moving the at least one rocker (14), and the drive (20) is mounted on a seat frame, in particular on a side part (100) of the seat frame, wherein a pinion (26) of the drive (20) meshes with the toothed segment (18), wherein, by aligning the position of the entire drive (20) relative to the side part (100) by means of a compensating body (200), the pinion (26) is positioned relative to the toothed segment (18) in a manner free from play.

A bracket for attaching an actuator is easily bonded to a side frame while avoiding interference with a shaft for driving a reclining mechanism. In a seat side frame which is provided at each of both ends of a seat back frame in the width direction, a reclining mechanism, and an actuator, the reclining mechanism is attached to a side wall of the side frame, and the actuator is fixed to an attachment bracket bonded to an inner surface of a portion to which the reclining mechanism is attached in the side wall in the width direction. An upper portion which is disposed above the attachment portion of the reclining mechanism and a lower portion which is disposed below the attachment portion thereof are connected to each other at the rear ends thereof and are separated from each other at the front ends thereof.

A deformation element for a motor vehicle seat, which element is intended to be arranged on a subassembly of a motor vehicle seat, having a base member, a deformation portion which is formed on the base member and on which the deformation element can be deformed and/or destroyed under the action of an external force, and a force introduction region by means of which a structural element of a motor vehicle seat can be brought into operational connection with the deformation portion so that a force acting on that structural element can be introduced via the force introduction region into the deformation portion. The deformation portion is formed by means of partial deformation of the material of the deformation element and at the transition of the deformation portion to the base member of the deformation element there is a weakening region which defines at least one tear line.

A clutch unit includes a lever-side clutch section configured to control transmission and interruption of rotational torque input by a rotation of an operation lever, and a brake-side clutch section configured to transmit the rotational torque from the lever-side clutch section to an output side and interrupt rotational torque that is reversely input from the output side. The lever-side clutch section includes a side plate to which the operation lever is fixed and an outer ring member that fits with the side plate. The brake-side clutch section includes a cover whose rotation is restricted. An angle regulating part configured to regulate a rotation angle of the operation lever is disposed radially inside of outer peripheral edges of the outer ring member and the cover and includes a claw of the outer ring member and a through hole of the cover.

A rotary plate provided to a lifter device is equipped with a wall which presses engaging ends of a pole toward the direction that brings said ends into abutment with a tooth surface of an inner tooth. A to-be-pressed surface of the pole has a shape that lies along a circular arc centered at an outline shape center point which is at a location shifted from a fluctuation center of the pole. The outline shape center point is on a normal line of the to-be-pressed surface at a contact point, and is situated on a side opposite to the direction in which the pole is fluctuated to be locked with respect to a straight line connecting between the contact point and the fluctuation center.