Patent ID: 7213881

Claim:
A locking device of a detachable vehicle seat, the locking device comprising: a leg frame coupled to an underside of a vehicle seat, wherein said leg frame comprises opposing front and rear ends; front and rear end locking parts, which respectively comprise a front main bracket and a rear main bracket, where each of said front and rear locking parts is configured to be connected to one or more strikers, wherein said front and rear end locking parts are installed at said front end and said rear end of said leg frame, respectively, and wherein the front end locking part is selectively locked/unlocked to at least one striker of said one or more strikers by means of a plurality of lock plates; and a spring member that provides an elastic recovery force to pivot the leg frame about a rotational axis of the front end locking part in a folded state when the rear end locking part is unlocked and the front end locking part is fixedly locked to at least one striker of the one or more strikers; wherein said rear end locking part comprises: a main bracket installed at a rear end of the leg frame in such a manner that it is rotatable in both forward and backward directions, is foldable in the forward direction and has a recess into which a striker of the one or more strikers is fitted; a lock plate which is rotated in said main bracket and locked with the striker by a pushing force being generated as soon as said striker is fitted into one side of the recess of the main bracket, as said striker is fitted into the recess; a cam which is rotatably coupled to said main bracket, and is caught by an engaging step of said lock plate, and limits the rotation of said lock plate in the locking state; another spring member which is installed between said lock plate and said cam and provides a pulling force for holding a front end of said cam to stay on the engaging step of the lock plate; a release lever of which one end is fixedly installed at a rotation center of the cam, wherein said release lever rotates said cam so that the front end of said cam is escaped from the engaging step by rotating it when said lock plate is to be unlocked; and a state-indicating part which is operated in cooperation with the rotation of said lock plate and indicates a locking/unlocking state via an indication hole of said leg frame installed at an outside of said leg frame.