Patent ID: 7242973

Claim:
A mobile electronic apparatus comprising: a main body having a battery chamber recessed generally in a rectangular shape in a lower portion of a back side of a casing, as opposed to a surface side having an operation unit and a display unit; a battery pack adapted to be removably contained in the battery chamber formed at a back face of the casing of the main body; and a collision avoiding unit including: protrusions into the battery chamber from the main body having generally sector-shaped and concavely curved ascent/descent portions formed into substantially concavely arcuate faces oriented toward the loading direction of the battery pack and suitably sector-shaped and convexly curved push-up portions formed into substantially convexly arcuate faces oriented toward the unloading direction of the battery pack, on inner wall faces formed on the two sides along the loading direction of the battery pack so as to form the battery chamber and near a corner portion intersecting an abutting wall face perpendicular to the inner wall faces for forming the battery chamber, wherein said protrusions into the battery chamber from the main body are disposed higher than and corresponding to a connecting terminal disposed in the battery chamber; and riding portions which are protruded from the battery pack generally in a sector shape and are formed on a back face of the battery pack confronting the ascent/descent portions and the push-up portions on the two widthwise sides of the battery pack and ascending/descending while sliding on the sector-shaped faces of the push-up portions so as to ride over the connecting terminal disposed in the battery chamber, wherein the riding portions of the battery pack are formed into substantially convexly arcuate faces oriented toward the unloading direction of the battery pack.