Patent ID: 7224953

Claim:
A receiving device comprising: a circuit board provided with an amplifier that amplifies a high frequency input signal, a filter that passes only an intended signal after tuning the high frequency input signal amplified by said amplifier, and a direct conversion unit in which the high frequency input signal from said filter is mixed with a local frequency signal having the same frequency to obtain a base band signal that is a differential signal, having a land of the reference potential around a hole that is used for a shield case and that is provided around said filter; a shield case that is formed of a metal plate and that surrounds said amplifier, filter and direct conversion unit, having a frame that surrounds said filter and a projection that is formed on said frame and that is inserted into the hole formed on said circuit board, in which said projection is connected to said land of the reference potential by soldering; and a metal shield cover that covers at least the frame surrounding said filter and that has a dropped-lid shape to come close to said filter; wherein said shield cover has a dropped-lid shaped portion that is bent to form the dropped-lid shape and a frame that is formed by bending said dropped-lid shaped portion; and wherein said dropped-lid shaped portion has a main surface portion that covers said filter, a first surface-contact portion formed between the main surface portion and said frame to be in surface contact with said frame, and a second surface-contact portion formed opposing to the first surface contact portion to be in surface contact with said frame.