A seat convertible to a bed. The seat includes a locking mechanism for fixably maintaining a head panel section of the bed in a generally horizontal orientation when the bed is in the deployed configuration and releasing the head panel section from the deployed configuration by a lifting motion. The locking mechanism is connected to the head panel section and a mid-swinging member. The mid-swinging member pivotally attaches to the head panel section and a stationary mounting arm. The stationary mounting arm is fixably attached to a seat frame.