Lid opening and closing system

A lid opening and closing system comprising:

• a lid that is mounted to a recess formed in a vehicle to be opened and closed with respect to the recess;
• a locking unit that is disposed on the lid and that retains the lid in a locked state when the lid is closed;
• and
• a lock releasing unit that is disposed in the vehicle and that releases the locked state of the lid,
• wherein the locking unit includes:
• a lock pin that is urged to protrude from a peripheral edge of the lid, that is retreatable into the peripheral edge and that is engaged with an engagement hole provided on an inner circumference of the recess in the locked state,
• wherein the lock releasing unit includes:
• a push button that is pushable in a pushing direction that is a direction from a front to a rear of the lid;
• a pushing element that is moved to push the lock pin or a part that is linked therewith to retreat the lock pin toward the lid to release the locked state;
• and
• a link unit that links the push button and the pushing element so that the pushing element is moved in an opposite direction of the pushing direction when the push button is pushed, and
• wherein a slope is provided at least one of contacting surfaces of the lock pin and the pushing element.