A lifter device includes: an output shaft; a support member supporting the output shaft; an input member coupled to an operation handle; a feed portion transmitting forward and reverse rotation of the input member to the output shaft; a lock portion locking the rotation of the output shaft; and a friction generating portion applying a frictional force to the rotation of the output shaft. A rotating cam of the friction generating portion is a switching structure of switching to: a friction-suppression state when the operation handle is in a neutral position and when the operation handle is turned from the neutral position in a direction of raising the seat; and a friction-on state when the operation handle is turned from the neutral position in a direction of lowering the seat.

A stopper is provided with a rotation shaft-side protrusion provided both on an outer circumferential surface of an outer circumferential surface part of a rotation shaft and on an end surface of a ratchet, and protrudes from each of the surfaces, an engagement member slidably supported on the outer circumferential surface, and engages with the rotation shaft-side protrusion in a rotation direction of the rotation shaft, and a support member-side protrusion provided to engage with the engagement member in the rotation direction such that a sliding surface part of a support member is formed concentric with the outer circumferential surface and a portion of the sliding surface part protrudes toward the outer circumferential surface part, wherein the sliding surface part faces the outer circumferential surface part so that the engagement member is slidably interposed between the support member and the outer circumferential surface.

An adjustment assembly or mechanism that permits adjustment of the height and angle of tilt of a vehicle seat includes front and rear latch gears with multiple cogs corresponding to discrete angular positions of the latch gears and consequently discrete heights of the front and rear of the adjustment assembly. The front latch gears pivot about a fixed pivot axis while the rear latch gears pivot about a sliding pivot axis to accommodate tilt angles for the seat. Torsion springs bias the four latch gears to a maximum rotation or pivot position in which the respective ends of the seat are at their highest vertical position. A spindle engages the cogs of the latch gears to hold the latch gears in a particular discrete angular position. Separate front and rear manual actuation levers at the front of the seat can be lifted to release a respective front and rear spindle from a particular cog and allow the driver to adjust the seat position. The independent front and rear adjustment mechanisms allow the driver to place the seat in a wide range of heights and tilt angles, including forward and rearward tilt angles.

A clutch unit that is used for a vehicle seat includes: a housing, which accommodates at least one of a input-side clutch and a output-side clutch, a first engaging portion, which is rotatable integrally with an output shaft member, and a lock member, which is able to be shifted between a locked state, in which the rotation of the output shaft member relative to the housing is suppressed by the lock member being locked to the first engaging portion, and an unlocked state, in which the rotation of the output shaft member relative to the housing is allowed by releasing the engaging with the first engaging portion, wherein when the lock member is shifted from the locked state to the unlocked state, the lock member is elastically deformed to release the engagement of the lock member and the first engaging portion.

An adjustment assembly or mechanism that permits adjustment of the height and angle of tilt of a vehicle seat includes front and rear latch gears with multiple cogs corresponding to discrete angular positions of the latch gears and consequently discrete heights of the front and rear of the adjustment assembly. The front latch gears pivot about a fixed pivot axis while the rear latch gears pivot about a sliding pivot axis to accommodate tilt angles for the seat. Torsion springs bias the four latch gears to a maximum rotation or pivot position in which the respective ends of the seat are at their highest vertical position. A spindle engages the cogs of the latch gears to hold the latch gears in a particular discrete angular position. Separate front and rear manual actuation levers at the front of the seat can be lifted to release a respective front and rear spindle from a particular cog and allow the driver to adjust the seat position. The independent front and rear adjustment mechanisms allow the driver to place the seat in a wide range of heights and tilt angles, including forward and rearward tilt angles.

A seat adjuster, includes a brake acting between fixed and adjustable parts so the adjustable part is blockable in positions on the fixed part and releasable by a release element, an adjustment element acting on the release element, selectively adjusting the adjustable part in two opposite directions, and a locking element automatically engaging and interlockingly locking the adjustable part to the fixed part when the adjustment element is not actuated and automatically disengaging when the adjustment element is actuated, disengagement of the locking element and adjustment of the adjustable part being effected by moving the adjustment element out of neutral position, the locking element having a toothed segment for meshing with a toothed ring coupled to the adjustable part so the locking element is movable in the radial direction of the toothed ring between locking and release positions, in which the locking element meshes with or moves away from the toothed ring.

Disclosed is a pumping device for a seat of a vehicle, the device including: a cam mechanism rotating along with a lever; a clutch mechanism receiving power from the cam mechanism; a housing accommodating the cam mechanism and the clutch mechanism therein; a brake mechanism accommodated in the housing to receive power from the clutch mechanism, and configured such that boss portions protrude along an outer circumferential surface thereof, outer end sides of the boss portions face an inner circumferential surface of the housing, and a pressing portion protruding from the clutch mechanism is disposed between a boss portion and a neighboring boss portion; and a brake roller provided at opposite sides of each of the boss portions of the brake mechanism to be disposed between the boss portion and the pressing portion.

Disclosed is a seat pumping device for a vehicle. The seat pumping device includes: a housing having a through hole formed therein; a clutch cam positioned on an inside of the housing and coupled such that a coupling protrusion protruding outwardly of the housing through the through hole is turnable relative to the housing; a lever bracket positioned on an outside of an upper surface of the housing so as to face the clutch cam with the housing interposed therebetween, the lever bracket being coupled to the coupling protrusion of the clutch cam to be turned integrally with the clutch cam; and a supporting portion protruding from one of the upper surface of the housing and a lower surface of the lever bracket toward a remaining one, the upper surface of the housing and the lower surface of the lever bracket facing each other, the supporting portion supporting the lever bracket and the housing so as to be spaced apart from each other at a regular interval.

A vehicle seat (1) has an adjusting device (40) for adjusting a relative position between a first component (24) and a second component (30) of the vehicle seat (1). The adjusting device (40) has a locking device (50) for locking the adjusting device (40) by a friction fit between a brake ring (60) and at least one brake element (70) of the adjusting device (40). The brake ring (60) is directly connected to the first component (24) or directly connected to the second component (30).

Disclosed is a seat pumping device for a vehicle. The seat pumping device includes: a housing; a return spring guide which is fixedly coupled to the housing and has an embedded return spring; a clutch cam which is rotatably accommodated in the housing; and a lever bracket which is partially accommodated in the return spring guide and coupled to the clutch cam so as to be rotated integrally with the clutch cam, in which the lever bracket is maintained spaced apart from the return spring guide by a separation support means, thereby improving operating characteristics of a lever handle.