US Patent 9463716 Vehicle slide rail device

A vehicle slide rail device in which a rear portion of the front locking section and a front portion of the rear locking section each contact inner surfaces of corresponding lock grooves; and a forward/rearward distance between a front surface of the front locking section and a front surface of a corresponding said forward/rearward movement restriction groove, and a forward/rearward distance between a rear surface of the rear locking section and a rear surface of a corresponding said forward/rearward movement restriction groove, are narrower than a forward/rearward distance between a rear surface of the front locking section and a rear surface of a corresponding said forward/rearward movement restriction groove, and a forward/rearward distance between a front surface of the rear locking section and a front surface of a corresponding said forward/rearward movement restriction groove.