Proposed is a folding seat that is capable of being folding to various positions by controlling a lever and the folding seat is capable of improving utilization of space around the folding seat. According to an embodiment of the present disclosure, the folding seat includes: a seat frame; a seat back frame cross-arranged in back of the seat frame, the seat back frame having a first side rotatably coupled to the seat frame; and a locking portion coupled at a first side thereof to the seat back frame and rotatably coupled at a second side thereof to the seat frame at a position between the seat frame and the seat back frame, wherein the locking portion is configured to be inserted into a rear portion of the seat frame or to be separated from the seat frame according to an operation thereof.

A rotary recline mechanism for allowing reclining movement of a first part relative to a second part, the mechanism comprising: a first gear mechanism comprising first and second gear rings having first and second sets of teeth that engage to lock the first and second parts relative to each other and disengage on operation of an actuator to allow relative movement of the first and second parts by application of a force on one of the parts in a first direction, and a second override gear mechanism to allow relative movement of the first and second parts by application of a force in a second direction while the first and second sets of teeth are engaged.

Provided are a seat state switching mechanism which can achieve switching between a walk-in state and a reclining state even with a small number of components, and a seat including the seat state switching mechanism. A seat state switching mechanism is a mechanism which can switch a state of a seatback between a walk-in state and a reclining state, the seat state switching mechanism including: a movable bracket tiltable together with the seatback; a locking member for locking the movable bracket at a predetermined walk-in locking position: and an input member, a first biasing member, and a second biasing member, each composing a releaser, for switching the state of the seatback to the reclining state by releasing a biased state of the locking member in receipt of a reclining operation force.

Proposed is a folding seat that is capable of being folding to various positions by controlling a lever and the folding seat is capable of improving utilization of space around the folding seat. According to an embodiment of the present disclosure, the folding seat includes: a seat frame; a seat back frame cross-arranged in back of the seat frame, the seat back frame having a first side rotatably coupled to the seat frame; and a locking portion coupled at a first side thereof to the seat back frame and rotatably coupled at a second side thereof to the seat frame at a position between the seat frame and the seat back frame, wherein the locking portion is configured to be inserted into a rear portion of the seat frame or to be separated from the seat frame according to an operation thereof.

A vehicular locking device includes a bore having first and second ends. A gas generating device is proximate the first end. A piston is movable along an interior of the bore. The vehicular locking device includes first and second plates. The second plate includes an aperture. Activation of the gas generating device accelerates the piston through the aperture and the second plate preventing displacement of the second plate.

A vehicle seat for use with a vehicle having a locking mechanism includes a seat bottom mountable on the vehicle so that a position of the seat bottom may be fixed by the locking mechanism, a seat back pivotally attached to the seat bottom and movable between first and second positions, and a release mechanism configured to release the locking mechanism. The release mechanism includes a release lever connectable to the locking mechanism, and a release bracket engageable with the release lever. One of the release lever and the release bracket includes a cam to cause the release lever to release the locking mechanism when the seat back is pivoted from the first position toward the second position. The cam includes a dwell surface that enables the locking mechanism to remain released until the seat back reaches the second position, or a position proximate the second position.

A vehicle seat for use with a vehicle having a locking mechanism includes a seat bottom mountable on the vehicle so that a position of the seat bottom may be fixed by the locking mechanism, a seat back pivotally attached to the seat bottom and movable between first and second positions, and a release mechanism configured to release the locking mechanism. The release mechanism includes a release lever connectable to the locking mechanism, and a release bracket engageable with the release lever. One of the release lever and the release bracket includes a cam to cause the release lever to release the locking mechanism when the seat back is pivoted from the first position toward the second position. The cam includes a dwell surface that enables the locking mechanism to remain released until the seat back reaches the second position, or a position proximate the second position.

A vehicular locking device includes a bore having first and second ends. A gas generating device is proximate the first end. A piston is movable along an interior of the bore. The vehicular locking device includes first and second plates. The second plate includes an aperture. Activation of the gas generating device accelerates the piston through the aperture and the second plate preventing displacement of the second plate.

A lock device is provided with: a latch unit having a slit which allows a striker to enter and exit and configured to engage with and to be disengaged from the striker; and a support member for supporting a spring member outside the latch unit in such a manner that the spring member extends in the width direction of the slit. The spring member is elastically deformed when in contact with the striker having entered the slit, and as a result, the spring member applies pressing force to the striker, the pressing force acting in the direction in which the striker exits the slit.

A vehicle seat includes a hinge cover that is disposed at aside portion of a seat cushion and has an opening through which a recliner shaft of a recliner provided between the seat cushion and a seat back passes, and a reclining lever that is disposed at an outer side in a seat width direction with respect to the hinge cover and is rotatable about the recliner shaft to unlock the recliner. A part of an edge portion of the opening of the hinge cover is provided with a facing portion that protrudes further toward the recliner shaft side than another portion of the edge portion and faces the recliner shaft in proximity.