In a slide rail device for use in a vehicle , a lock spring support portion of an upper rail includes an upward-downward movement restriction support portion. The upward-downward movement restriction support portion includes an open holding portion which is open at a top thereof and holds a supported portion of a lock spring and an uplift prevention projection which is formed projecting into the open holding portion so as to overlap the supported portion of the lock spring, which is held by the open holding portion, in the upward and downward directions.

In a slide rail device for use in a vehicle, a lock control member comprises a pair of facing walls which face a pair of side walls of an upper rail and extend in upward and downward direction, and a pair of anti-rattle projections which project from the pair of facing walls toward the pair of side walls of the upper rail.

A track assembly includes a first track having a first inner surface, a first support coupled to the first inner surface, a second track having a second inner surface, and a second support coupled to the second inner surface. The second track is slidably coupled to the first track. The first support has a first free end that extends from the first inner surface at a downward sloping angle. The second support has a second free end that extends from the second inner surface at an upward sloping angle. The first support and the second support are positioned such that the second free end is disposed above the first free end.

A front upper support surface and a rear upper support surface facing an upper surface of a rear end of an operation handle are provided in a lock release lever with a gap between the front upper support surface and the rear upper support surface in the vehicle front-rear direction, and front lower support surfaces are provided below the front upper support surface. An upper rail is provided with a rear lower support surface, which is positioned below a rear upper support surface. A clearance is provided between the front lower support surface and a lower surface of a rear end of the operation handle, and a clearance is provided between the rear lower support surface and the lower surface of the rear end of the operation handle.

A seat slide device includes a pair of sliders each including a fixed rail, a movable rail slidably guided by the fixed rail, a bracket on the movable rail configured so that front and rear sides swing opposite to each other in a vertical direction with a longitudinal-intermediate part as a fulcrum, a support bracket supported on the bracket via a hinge and configured to rotate in only one direction from a predetermined orientation about an lateral-direction axis relative to the bracket, a movement-restricting portion configured to restrict sliding of the movable rail while a rear part of the bracket is raised and to release the restriction while the rear part of the bracket is lowered; and a towel bar connecting each support bracket. The hinge part prohibits a rotation of the support bracket while the towel bar is lifted and permits the rotation while the towel bar is lowered.

The present disclosure provides a seat rail locking device for a vehicle, which may apply a method of moving a lock pin in an upward direction to lock a seat rail by moving away from a conventional seat rail locking method of moving the lock pin in a directly downward direction to pass through a floor panel, thereby not causing the interference with the floor panel at all to flexibly apply a battery mounting structure to the floor panel, improving an assembling property as an operator may easily assemble a lock pin guide configured to guide the lock pin to move in upward and downward directions to a movable rail with only one-touch operation, and preventing the lock pin from being damaged or separated by mounting a cap at an upper end of the lock pin.

The present disclosure provides a seat rail locking device for a vehicle, which may apply a method of moving a lock pin in an upward direction to lock a seat rail by moving away from a conventional seat rail locking method of moving the lock pin in a directly downward direction to pass through a floor panel, thereby not causing the interference with the floor panel at all to flexibly apply a battery mounting structure to the floor panel, improving an assembling property as an operator may easily assemble a lock pin guide configured to guide the lock pin to move in upward and downward directions to a movable rail in only an insertion and rotation operation.

A seat slider device may include a lower rail attachable to a body of a vehicle; and an upper rail attachable to a lower portion of a seat and slidably engaging with the lower rail. The upper rail may include a lock pin movable along a short direction of the upper rail. The lower rail may include a plurality of first holes and a second hole. The first holes may be arranged along a longitudinal direction of the lower rail and configured to engage with the lock pin, and the second hole may be arranged with the first holes along the longitudinal direction of the lower rail. The second hole may be positioned at a position where the lock pin is incapable of engaging with the second hole or the second hole may have a size with which the lock pin is incapable of engaging.

A sliding device for a vehicle seat is provided. The sliding device includes a pair of parallel slideways, each of which comprises a lower rail, an upper rail slidably mounted to the lower rail and a latch for allowing/preventing a movement of the upper rail relative to the lower rail. A releasing member is provided for driving the latches to a position in which the upper rails are free to move relative to the lower rails. Each latch has a rear portion which is bent into a “U”-like shape and comprises a lower leg carrying latching elements configured to cooperate with corresponding latching elements provided in the lower rail and an upper leg configured to engage the releasing member. The design of the latches improves the reliability of the sliding device.

A seat sliding structure for a vehicle includes: a pair of left and right slide rails that include upper rails, which are attached to a lower portion of a vehicle seat, and lower rails, which support the upper rails such that the upper rails can slide in a vehicle longitudinal direction; rail guiding members that are fixed to a floor panel, and that support the lower rails such that the lower rails can slide in the vehicle longitudinal direction between a driving position at a vehicle front side and a relaxation position at a vehicle rear side; and a locking mechanism that locks movement of the slide rails at the relaxation position, and that releases a locked state when a frontal collision of the vehicle is detected or predicted.