Tuner module for radio receiver

Abstract

The present invention is applied to a tuner module comprising a circuit as a constituent component for tuning at the time of radio signal reception and a metal case made of aluminum and receiving the circuit. The circuit includes at least one IC component. In the metal case, a heat conductive sheet is attached between the at least one IC component and the metal case so as to be in contact with them. Furthermore, a heat radiating sheet is attached to an outer surface of the metal case.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram showing the structure of a satellite digital radio receiver as one example of a conventional digital radio receiver;

FIG. 2 is a perspective view showing a schematic structure of a tuner module in an automobile digital radio receiver to be applied with this invention;

FIGS. 3A and 3B are diagrams as seen from the top and bottom sides of a printed wiring board mounted with circuit components constituting the tuner module shown in FIG. 2; and

FIG. 4 is a perspective view showing a schematic structure of the tuner module shown in FIG. 2, in the state where this invention is applied thereto.

Claims

1. A tuner module comprising a circuit as a constituent component for tuning at the time of radio signal reception and a metal case made of aluminum and receiving said circuit, said circuit including at least one IC component, wherein, in said metal case, a heat conductive sheet is attached between said at least one IC component and said metal case so as to be in contact with them, anda heat radiating sheet is attached to an outer surface of said metal case.

2. A tuner module according to claim 1, wherein said heat radiating sheet is attached to the outer surface of said metal case in a region including a bonding region of said heat conductive sheet.

3. A tuner module according to claim 1, wherein said constituent component comprises a printed wiring board and a first and a second IC component mounted on both sides of said printed wiring board, respectively, said first and second IC components including said at least one IC component, and wherein, in said metal case, a first heat conductive sheet is attached between said first IC component and said metal case so as to be in contact with them and a second heat conductive sheet is attached between said second IC component and said metal case so as to be in contact with them.

4. A tuner module according to claim 3, wherein a first and a second heat radiating sheet are respectively attached to the outer surfaces of said metal case in regions including bonding regions of said first and second heat conductive sheets.

5. A tuner module according to claim 1, wherein said heat conductive sheet is made of silicone rubber.

6. A tuner module according to claim 1, wherein said metal case comprises aluminum-diecast upper and lower cases.

7. An automobile digital radio receiver incorporating the tuner module according to claim 1.