The present disclosure provides a pumping device of a vehicle seat and its operation mechanism. The pumping device includes: a housing encasing a pumping mechanism; a spring guide which has a ring shape formed with a cavity and is seated on a top surface of the housing, a coil spring being inserted in the spring guide; and a lever bracket which has a protruding portion formed on a central portion, an operating lever being coupled to a flange, and a locking protrusion protruding from the flange and locked to the coil spring through the guide slit of the spring guide. In particular, the protruding portion is connected to a cam of the pumping mechanism in a state of being inserted into the cavity of the spring guide.

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

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 present invention provides a seat pumping device for a vehicle, the seat pumping device including: a clutch device which is rotated clockwise or counterclockwise by receiving external manipulation force, and has one or more manipulation flanges that are disposed at a predetermined interval in a circumferential direction and protrude in an axial direction; and a brake device which has one or more manipulation grooves in which the manipulation flanges are accommodated to come into contact with the manipulation grooves clockwise or counterclockwise so that the brake device is rotated clockwise or counterclockwise by receiving the external manipulation force from the clutch device, and performs a brake function such that the brake device is not rotated clockwise and counterclockwise by external force that is not through the clutch device.

A rotation control apparatus includes an engagement lever configured to restrict a rotation of a pinion gear by engaging with a ratchet wheel and a drive lever driving and rotating the pinion gear in a direction where a seat moves upward by integrally rotating with an operation member in a state where the drive lever engages with the ratchet wheel based on a rotation operation of an operation handle in a first direction. The engagement lever disengages from the ratchet wheel by the rotation of the pinion gear in a case where the seat moves upward. The rotation control apparatus further includes an engagement lever control piece and a drive lever control piece which cause the engagement lever and the drive lever respectively to disengage from the ratchet wheel based on the rotation operation of the operation handle in a second direction.

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.

A variable height support with a platform and a base supporting the platform and reconfigurable to selectively change a height of a support surface on the platform relative to a subjacent surface. A control assembly is operable to selectively: a) maintain the support surface at a selected height; and b) release the platform to allow the base to be reconfigured to change the height of the support surface. The control assembly has a ratchet subassembly that, with the control assembly in a first state, allows the base to be reconfigured by exerting a continuous upward force upon the platform that causes the platform to elevate and be blocked within a range at a plurality of different vertical locations against downward movement. The control assembly further has an actuator that is repositionable to change the control assembly into a second state wherein the platform can be lowered over the range.

The present disclosure provides a pumping device of a vehicle seat and its operation mechanism. The pumping device includes: a housing encasing a pumping mechanism; a spring guide which has a ring shape formed with a cavity and is seated on a top surface of the housing, a coil spring being inserted in the spring guide; and a lever bracket which has a protruding portion formed on a central portion, an operating lever being coupled to a flange, and a locking protrusion protruding from the flange and locked to the coil spring through the guide slit of the spring guide. In particular, the protruding portion is connected to a cam of the pumping mechanism in a state of being inserted into the cavity of the spring guide

A clutch unit includes a lever-side clutch section provided on an input side, for controlling rotational torque to be input through lever operation, and a brake-side clutch section provided on an output side, for transmitting the rotational torque from the lever-side clutch section to the output side, and interrupting rotational torque to be reversely input from the output side. The brake-side clutch section has a two-layer structure, in which two one-way clutches are arranged side by side in an axial direction. The first one-way clutch interrupts rotational torque in a forward direction, which is reversely input from the output side, through meshing of serrated projection and depression portions, whereas the second one-way clutch interrupts rotational torque in a backward direction, which is reversely input from the output side, through meshing of serrated projection and depression portions arranged in an opposite direction.