| 摘要 |
An upper rail is slidably engaged with a lower rail in a manner to define an elongate enclosed space therebetween. A lock plate is placed in the elongate enclosed space and secured to the lower rail. A latch lever includes a pawl portion and an input arm and is placed in the elongate enclosed space. The latch lever is pivotally connected to the upper rail to pivot between a lock position where the pawl portion is engaged with a part of the lock plate to establish a locked engagement between the lower and upper rails and an unlock position where the pawl portion is released from the lock plate to cancel the locked engagement. The latch lever is pivoted in a direction from the lock position to the unlock position when the input arm is applied with an external force. A spring member is placed in the elongate enclosed space to bias the latch lever to pivot toward the lock position, An opening is formed in the upper rail for having a given part of the input arm projected outward therethrough.
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