Patent ID: 8211562

Claim:
A battery pack to be connected to electronic equipment, the battery pack comprising: a plastic-made, elongated outer casing having peripheral walls interconnected to define a battery storage portion, the outer casing comprising a mounting protrusion to be attached to a casing of the electronic equipment and project therefrom in the attached state; an inner casing incorporated inside the battery storage portion of the outer casing at the mounting protrusion; and at least one battery accommodated in the battery storage portion inside the outer casing, wherein the mounting protrusion is a double structure comprised of the outer casing and the inner casing, and the battery is accommodated inside the double structure, and the battery accommodated inside the double structure is located outside the electronic equipment when the mounting protrusion is in the attached state, wherein the inner casing has an anti-shock rib formed integrally at an end of the inner casing, wherein the inner casing has an integrally formed side wall disposed inside the outer casing, and the anti-shock rib is connected to the side wall, and wherein the inner casing has a plurality of the anti-shock ribs, and the outermost one of the anti-shock ribs is made thicker relative to an innermost one of the anti-shock ribs which is closest to the battery.