| 摘要 |
PURPOSE:To unify a case of a T type filter by constituting it so that a base plate provided with receiving metallic fittings of a piezoelectric vibrator can move along a guide rail formed on a base. CONSTITUTION:A guide rail 11, a connecting terminal 9, and a ground connecting terminal 10 are provided in the longitudinal direction of a base 2, and receiving metallic fittings 12 are provided on the connecting terminal 9. A base plate to which a capacitor 8 and receiving metallic fittings 7 have been stuck is mounted between the base and the guide rail 11. In that case, the base plate 3 is moved in the direction as indicated with arrows A-B so as to conform with a length (l) of a piezoelectric vibrator 4, a ground pattern 7 and the ground terminal 10 are connected by a connecting line 13, and thereafter, the base plate 3 is stuck to the base 2. After all the works have been ended, a case 1 is stuck to the base. In this way, the case can be unified, and the cost can be reduced. |
