Dc adaptor and electronic apparatus using the same

Abstract

The present invention provides a DC adapter that can be housed in a battery housing portion of an electronic apparatus selectively with a primary and secondary battery. The DC adapter (3) is connected to an AC/DC converter (35) and is inserted into a battery housing portion (20) of an electronic apparatus (1) so as to supply the electronic apparatus with a DC power, wherein a substantially cylindrical adapter main body (31) has an insertion limiting portion (41) which is guided by an insertion guide portion (57) of the battery housing portion when the DC adapter is inserted into the battery housing portion with the proper polarity, and comes into contact with the insertion end side wall (58) of the battery housing portion when the DC adapter is inserted into the battery housing portion with the reversed polarity so as to limit the insertion of the DC adapter, and the insertion limiting portion being formed by projecting a part of the outer circumference of the cylindrical main body in a rectangular manner along the longitudinal direction of the main body and having two sides (41a) (41b) each of which extends from a part of the outer circumference of the DC adapter, wherein the center angle of the circular arc obtained by connecting the proximal ends of the two sides on the outer circumference of the DC adapter is less than 90°.

Dependencies are inferred from the claim text.