| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly stable piezoelectric oscillator which prevents circuit parts on a printed circuit board from being deteriorated by heat, by means of heating a piezoelectric vibrator in a concentrated state by surrounding the piezoelectric vibrator mounted on the printed circuit board by a metal cap and by attaching a heat-generating part for heating to a metal cap periphery isolated from the printed circuit board. SOLUTION: The oscillator is provided with an upper printed circuit board 10 for mounting a piezoelectric vibrator which is arranged in parallel holding a prescribed distance to an upper face of a base printed circuit board 2, the piezoelectric vibrator 20 which is mounted on a lower face of the upper printed circuit board, the metal cap 30 which surrounds a space of the lower face of the upper printed circuit board including the piezoelectric vibrator, the heat-generating part 40 which is fixed to the lower face of the metal cap in a contactless state with the upper face of the base printed circuit board, an oscillating circuit part 50 which is mounted on the upper face of the upper printed circuit board, and a metal oscillator case 70 which surrounds the space on the base printed circuit board including each part. COPYRIGHT: (C)2008,JPO&INPIT
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