Patent ID: 7762605

Claim:
A locking device, comprising: a locking mechanism provided on one of two members to be engaged with each other; and a striker provided on the other of the two members, wherein the locking mechanism comprises a base plate, a hook, a pawl, a cam, a locking spring, a thrust spring and a canceling plate, wherein the base plate has a recess that is capable of receiving the striker, wherein the hook is rotatably attached to the base plate via a shaft, further wherein the hook, when rotated, is capable of forming a locked condition in which the striker is held between the hook and the recess of the base plate or an unlocked condition in which the hook is spaced away from the striker, wherein the pawl is rotatably attached to the base plate via a shaft, further wherein the pawl is capable of rotating to a position in which the pawl can engage the hook and maintaining the hook in the locked condition, wherein the cam is rotatably supported via the shaft of the pawl and is coaxially rotatable with the pawl, further wherein the cam is capable of further pressing the hook in the locked condition toward a locking direction, wherein the locking spring is provided between the pawl and the canceling plate, further wherein the locking spring is capable of biasing the hook and the pawl such that the hook and the pawl are stabilized in the locked condition or the unlocked condition, wherein the thrust spring is provided between the cam and the base plate and is capable of biasing the cam in a direction to press the hook, and wherein the canceling plate is rotatably supported via the shaft of the hook and is coaxially rotatable with the hook, further wherein the canceling plate has a movable range in which the canceling plate can rotate relative to the hook and has a contacting portion that is capable of contacting the striker within the movable range when the hook is in the locked condition.