Abstract: A seat sliding device for vehicles includes lower and upper rails and a locking member for locking or unlocking the upper rail relative to the lower rail. The upper rail is equipped at a lower end of its downward side wall portion with a lower inward corner portion formed of a raised wall portion and a bottom wall portion. The locking member has an axial portion that is placed on and biased against the lower inward corner portion of the upper rail such that the locking member is swingable about an axis of the axial portion to lock or unlock the upper rail relative to the lower rail. This seat sliding device makes it possible to reduce the number of parts and improve operation stability of the locking member.

Abstract: A seat sliding device for vehicles includes lower and upper rails and a locking member for locking or unlocking the upper rail relative to the lower rail. The upper rail is equipped at a lower end of its downward side wall portion with a lower inward corner portion formed of a raised wall portion and a bottom wall portion. The locking member has an axial portion that is placed on and biased against the lower inward corner portion of the upper rail such that the locking member is swingable about an axis of the axial portion to lock or unlock the upper rail relative to the lower rail. This seat sliding device makes it possible to reduce the number of parts and improve operation stability of the locking member.

Abstract: A release lever includes: a release pressing portion pressing a portion around a lock portion of a plate spring to release an engagement of the lock portion with a locked portion; an operation portion located in a front side of the release lever and operated by a lock release operation of an operation handle; and a swing fulcrum portion provided between the release pressing portion and the operation portion. The plate spring integrally includes: a base including the swing fulcrum portion and fixed to an upper rail; a rear biasing portion located behind the base in a vehicle front-rear direction and biasing the lock portion in a lock direction; and a front biasing portion located in front of the base in the vehicle front-rear direction and biasing the operation handle upward. The front biasing portion has a biasing force smaller than that of the rear biasing portion.

Abstract: A seat sliding device for vehicles includes lower and upper rails and a locking member for locking or unlocking the upper rail relative to the lower rail. The upper rail is equipped at a lower end of its downward side wall portion with a lower inward corner portion formed of a raised wall portion and a bottom wall portion. The locking member has an axial portion that is placed on and biased against the lower inward corner portion of the upper rail such that the locking member is swingable about an axis of the axial portion to lock or unlock the upper rail relative to the lower rail. This seat sliding device makes it possible to reduce the number of parts and improve operation stability of the locking member.

Abstract: A release lever includes: a release pressing portion pressing a portion around a lock portion of a plate spring to release an engagement of the lock portion with a locked portion; an operation portion located in a front side of the release lever and operated by a lock release operation of an operation handle; and a swing fulcrum portion provided between the release pressing portion and the operation portion. The plate spring integrally includes: a base including the swing fulcrum portion and fixed to an upper rail; a rear biasing portion located behind the base in a vehicle front-rear direction and biasing the lock portion in a lock direction; and a front biasing portion located in front of the base in the vehicle front-rear direction and biasing the operation handle upward. The front biasing portion has a biasing force smaller than that of the rear biasing portion.