According to one embodiment, a vehicle-seat slide device includes a rail to be fixed to a floor, the rail extending in a vehicle front-back direction; a slider slidably attached to the rail and fixed to a seat; a lock member being movable between a lock position at which the slider is locked to one of slide positions on the rail and a lock release position at which the slider is released from being locked to the rail; a support member fixed to the slider; and an operational member supported by the support member to be rotatable about a rotational center extending in a vehicle lateral direction. The operational member receives an input from an input member to rotate in a first rotational direction around the rotational center to thereby move the lock member from the lock position to the lock release position.

A releasing lever for a sliding device in one aspect of the present disclosure is used for the sliding device including a movable rail and a fixed rail. The releasing lever includes a first protrusion and a second protrusion. The first protrusion is formed in an intermediate portion of the releasing lever and protrudes in an abutting direction on a first end of the intermediate portion. The second protrusion is formed in a position offset from the first protrusion toward a second end of the intermediate portion, and protrudes in the abutting direction. The first protrusion and the second protrusion contact an inside wall surface of the movable rail at least when the releasing lever pivots.

A longitudinal adjuster (10) for a vehicle seat (1), has pairs of rails (12a, 12b) including a lower rail (14a) and an upper rail (14b) that are movable in a longitudinal direction (x) relative to one another and can be locked together by a locking device (16). An actuating device (18) has a transmission rod (22) arranged between the two locking devices. A hand grip (20), connected to the transmission rod, is provided for joint actuation of the two locking devices. The transmission rod is operatively connected to the two locking devices. A spring element (30), which applies a spring force to the actuating device toward a rest position or passive position, does not project beyond the locking device in the vertical direction (z). The spring element applies a torque to the transmission rod along the longitudinal extent thereof relative to the longitudinal direction (x).

Provided is a seat sliding device. The seat sliding device comprises a fixed-side rail, a movable-side rail, a lock portion, an elastically deforming portion, and a releasing member. The lock portion is displaceable between a restraint position and a release position. The elastically deforming portion comprises: a linear portion that is an elastically deformable portion extending in a direction approximately parallel to a longitudinal direction of the movable-side rail; and an engaging portion protruding from an extending-direction leading end portion of the linear portion in a direction approximately perpendicular to an extending direction of the linear portion. The releasing member comprises: a first engaged surface that is contactable with the engaging portion from one end side in the extending direction; and a second engaged surface that is contactable with the engaging portion from the other end side in the extending-direction.

A rail for a vehicle seat having first and second sliding rail members driven by a motorized drive mechanism. The rail further comprises a mechanical lock actuated by a relative movement between the motorized drive mechanism and the second rail member in the event of an accident.

A track adjuster includes a pair of tracks, a lockset configured to selectively restrict movement of the pair of tracks, a first lever configured to actuate an actuator of the lockset, a second lever configured to actuate the first lever, and a spring configured to apply a first biasing force to the first lever in a first rotational direction and apply a second biasing force to the first lever in a second rotational direction. The spring may be a torsion spring that may be wrapped at least partially around a cross member connecting the pair of tracks with a second pair of tracks.

A vehicle seat sliding device includes a lower rail, an upper rail, a lock lever, a spring, and an operation handle. A first through hole and a second through hole which are separated from each other in a longitudinal direction of the upper rail are formed in the upper rail. The lock lever further has a first engaging part which abuts on an inner wall surface of the first through hole and a second engaging part which abuts on an inner wall surface of the second through hole. At least while the lock lever is rotated by the operation handle, the first engaging part is engaged by the first through hole, and the second engaging part is engaged by the second through hole.

A seat sliding device includes a lower rail, an upper rail, a lever member, a lock member, a biasing member and an operation member. The upper rail includes a shaft member, and the lever member includes bearings engaging with the shaft member. Each of the left and right bearings has a surface in contact with the shaft member at one point in an up-down direction by being biased by the biasing member. In the pair of left and right bearings, a surface in contact with the shaft member in one bearing is formed as an arc-shaped surface with a radius slightly larger than an outer diameter of the shaft member, and a surface in contact with the shaft member in the other bearing is formed as a flat surface extending relative to the upper rail in the longitudinal direction.

Provided is a vehicle seat which is attached to a floor of a vehicle via a rail device and a coupling device with a high level of stiffness so as to minimize deformation of the rail device and the coupling device without substantially increasing the weight and the manufacturing cost of the seat. The vehicle seat is provided with an upper engagement portion secured to a member on a side of an upper rail of the rail device, and a lower engagement portion secured to a member on a side of a lower rail of the rail device and including a part opposing a corresponding part of the upper engagement portion from above defining a prescribed gap therebetween. The coupling device is provided laterally spaced from the rail device, and the upper engagement portion and the lower engagement portion are provided substantially directly above the coupling device.

A sliding device includes a fixed rail, a movable rail, a shutter to close an opening of the fixed rail, an engaging body including a pressed portion, an engaged portion, a resilient element, and a pressing portion provided to the movable rail or the shutter. The shutter is slidable relative to the fixed rail by receiving a force from the movable rail. The engaging body is provided to one of the shutter and the fixed rail, and the engaged portion is provided to the other. The engaging body is displaceable between an engaged position where it is engageable with the engaged portion and a disengaged position displaced from the engaged position. The resilient element produces a resilient force maintaining the engaging body in the engaged position. The pressing portion contacts with the pressed portion when the movable rail slides, thus displacing the engaging body to the disengaged position.