To reduce rattling between a slide lever and a release lever and abnormal noise. A connecting end part (172) of a slide lever (17) has a tubular shape, and a front end part (161a) of a release lever (161) is inserted in the connecting end part (172) with a connection spring member (180) therebetween. The connection spring member (180) is formed of a worked wire material for springs and has a bent end (181a) located forward and wire parts (181) extending rearward from the bent end (181a). Protruding engagement parts (183) are formed in the wire parts (181). The wire parts (181) are placed inside the front end part (161a) of the release lever (161), and the protruding engagement parts (183) are made to protrude from engagement protrusion holes (161e) of the release lever (161) in advance, and then the tubular connecting end part (172) of the slide lever (17) is fitted on the outer side of the front end part (161a). The protruding engagement parts (183) of the connection spring member (180) engage with engagement holes (172b) of the slide lever, and at the same time, its front lock part (182) presses the inner surface of the connecting end part (172).

A sliding device that slidably supports a seat body of a vehicle seat is provided. The sliding device includes: a fixed rail; a movable rail; a locking member displaceable between a locking position and an unlocking position, a sliding movement of the movable rail being restricted in the locking position, and restriction of the sliding movement being released in the unlocking position; a retention spring configured to apply to the locking member a retaining force to retain the locking member in the locking position; a release lever configured to displace the locking member to the unlocking position; a return spring configured to apply to the release lever an elastic force to return the release lever to its initial position; and a restrictor configured to restrict a displacement of the release lever.

Provided is a slide device that can prevent rattling of a seat with a simple structure. A slide device includes a lock mechanism for fixing an upper rail to a lower rail. The lock mechanism includes a shaft attached to the upper rail, a lock tooth swingably supported by the shaft, and a wave washer that presses the lock tooth in an axial direction of the shaft. An outer circumferential face of the shaft has an outer tapered face slanted so that the shaft becomes thinner along a direction from a proximal end portion toward a distal end portion. An inner circumferential face of the shaft hole of the lock tooth has an inner tapered face having a slant angle that allows face-to-face contact with the outer tapered face. The wave washer presses the lock tooth in a direction in which the inner tapered face is pressed against the outer tapered face to make face-to-face contact.

Provided is a slide device that can prevent rattling of a seat with a simple structure. A slide device includes a lock mechanism for fixing an upper rail to a lower rail. The lock mechanism includes a shaft attached to the upper rail, a lock tooth swingably supported by the shaft, and a wave washer that presses the lock tooth in an axial direction of the shaft. An outer circumferential face of the shaft has an outer tapered face slanted so that the shaft becomes thinner along a direction from a proximal end portion toward a distal end portion. An inner circumferential face of the shaft hole of the lock tooth has an inner tapered face having a slant angle that allows face-to-face contact with the outer tapered face. The wave washer presses the lock tooth in a direction in which the inner tapered face is pressed against the outer tapered face to make face-to-face contact.

A latch assembly for a sliding seat includes a handle and a latch body fixed to the handle. The latch body is securable pivotally to one of an upper rail and a lower rail of the sliding seat. The latch body is pivotable via the handle between a locked position and an unlocked position. The latch body includes teeth openings arranged along a lengthwise dimension, where the teeth openings sequentially decrease in size. The assembly essentially eliminates problems associated with skip-locking and chucking in existing designs.

A vehicle seat slide apparatus includes: a lower rail; an upper rail movably mounted on the lower rail and configured to support a seat; an annular-shaped lock spring attached to the upper rail; and an unlocking member attached to the upper rail, wherein: the lock spring has a lock portion configured to engage the lower rail to restrict upper rail movement; the unlocking member is configured to release movement restriction of the upper rail by displacing the lock spring to release an engagement state between the lock spring and the lower rail, is disposed inside the lock spring in both longitudinal and width directions of the upper rail, and includes a rotating portion and a pressing portion; the rotating portion is made of one flat plate material, and is configured to rotate; and the pressing portion is configured to be connected to the rotating portion and press the lock spring.

The vehicle seat slide apparatus includes a lower rail, an upper rail, a locking spring having a locking portion that restricts movement of the upper rail by engaging with the lower rail, and an unlocking mechanism that releases movement restriction of the upper rail. One end side of the locking spring is movably attached to the upper rail, the other end side of the locking spring is fixed to the upper rail, and the locking portion is provided between the one end side and the other end side. The upper rail includes a during locking restricting portion that restricts movement of the one end side of the locking spring by contacting the one end side of the locking spring when the locking spring and the lower rail are in an engaged state.

An actuation mechanism for a longitudinal adjuster of a vehicle seat may have at least one actuation arm, a trigger lever, and a positioning element which is arranged on the trigger lever and which is pivotally mounted on a free lever end of the trigger lever.

The present invention relates to a sliding device (1) for a vehicle seat. The sliding device comprises a pair of parallel slideways (3a, 3b), each of which comprises a lower rail (5a, 5b), an upper rail (7a, 7b) slidably mounted to the lower rail and a latch (21a, 21b) for allowing/preventing a movement of the upper rail relative to the lower rail; a releasing member (29) is provided for driving said latches to a position in which the upper rails are free to move relative to the lower rails. According to the invention, each latch (21a, 21b) comprises a rear portion which is bent into a “U”-like shape and comprises a lower leg carrying latching elements (37a, 37b) configured to cooperate with corresponding latching elements (41a, 41b) provided in the lower rail and an upper leg configured to engage the releasing member (29). The design of the latches of the sliding device of the invention allows to improve the reliability of said sliding device.

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.