Patent ID: 8722257

Claim:
A metal air battery, comprising: an external case formed in a cylindrical shape, and having a cathode terminal at a first end thereof and an anode terminal hole at a second end thereof; an internal case formed in a cylindrical shape, coaxially received in the external case, and having at a first end thereof an anode terminal, the internal case being moveable in a coaxial direction within the external case and having air inflow holes formed in a cylindrical wall portion of the internal case to permit inflow of air therethrough; and elastic sealing means provided at a second end of the internal case, the elastic sealing means enabling the internal case to elastically move in the coaxial direction and thereby causing the anode terminal to elastically move into the anode terminal hole and allow the air to flow into the anode terminal hole and into the air inflow holes of the internal case as the anode terminal is elastically pressed when the battery is inserted into a battery compartment, the elastic sealing means further enabling sealing the anode terminal hole to block the air from flowing through the anode terminal hole and through the air inflow holes of the internal case as the anode terminal elastically restores its initial position when the battery is separated from the battery compartment.