US Patent 7766409 Lid opening and closing system

According to an aspect of the present invention, there is provided a lid system including: a lid mounted to a recess to be opened and closed; a locking unit that retains the lid in a locked state to keep the lid closed; and a lock releasing unit that releases the locked state to open the lid. The locking unit includes: a pin that is protruded from a peripheral edge of the lid to be engaged with a hole on the recess in the locked state and retreated to release the locked state. The lock releasing unit includes: a push button pushable in a pushing direction; and a pushing element moved to push the lock pin in an opposite direction of the pushing direction by being linked with the push button.