Patent ID: 7923647

Claim:
A portable device for performing wireless communication with a predetermined communication subject, the portable device comprising: a circuit board on which an electronic component used to perform wireless communication is mounted; and a case for accommodating the circuit board, the case including: a first case part having a board compartment for accommodating the circuit board; a second case part for covering the circuit board when accommodated in the board compartment of the first case part, wherein the first case part and the second case part are joined with each other and unitized in a superimposed state˜ the first case part is formed from a synthetic resin that transmits laser light; the second case part is formed from a synthetic resin that absorbs laser light; the first case part and the second case part each include a joined portion, wherein the joined portion of the first case part and the joined portion of the second case part are laser welded to each other in the superimposed state, with the joined portion of the first case part transmitting laser light therethrough and the joined portion of the second case part absorbing laser light; the first case part has a first side including the board compartment and a second side opposite the first side, and the second case part entirely covers the first side of the first case part, the case further including: a cover entirely covering the second side of the first case part, in which the second case part and the cover are each formed from a synthetic resin having light resistance to ultraviolet light.