Patent ID: 6041128
Filing Date: 2000-03-21
Classification: H01M,H04R

Abstract:
A battery receiving chamber that blocks an opening of a battery compartment, which is formed in a case, for attaching and detaching a battery by using a battery cover formed separately from the case, said battery receiving chamber comprising:first convex parts that are located in an internal side face of said battery compartment and have inclined surfaces which increase in height toward the rotational direction in which a battery cover is detached from said battery compartment;second convex parts that are located in said battery cover, corresponding to the first convex parts and have inclined surfaces which increase in height toward the rotational direction in which said battery cover is detached from said battery compartment; andwaterproof means, which is inserted between said case and said battery cover, for preventing external moisture from entering through a gap between said case and said battery cover into said battery compartment;wherein said battery cover is gradually raised from said case by sliding of said inclined surfaces of said second convex parts on said inclined surfaces of said first convex parts toward a higher place of said inclined surfaces of said first convex parts to thereby rotationally detach said battery cover from said battery compartment of said case.