JPS643326U

JPS643326U -

Info

Publication number: JPS643326U
Application number: JP9646687U
Authority: JP
Priority date: 1987-06-23
Filing date: 1987-06-23
Publication date: 1989-01-10

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示し、Ａは縦断側面
図、ＢはＡ図イ−イ線に沿う縦断正面図、Ｃは底
面図、Ｃは分解斜視図、第２図はこの種圧電フイ
ルタの等価回路図、第３図は従来例を示し、Ａは
縦断側面図、Ｂは部分断面底面図である。１，２……圧電共振子、３……入力端子板、４
……出力端子板、５……中間接続用端子板、６…
…接地用端子板、７……金属製ケース、８……絶
縁板。 Fig. 1 shows an embodiment of the present invention, A is a vertical side view, B is a longitudinal front view taken along line A--A in Fig. A, C is a bottom view, C is an exploded perspective view, and Fig. 2 is a piezoelectric FIG. 3 shows an equivalent circuit diagram of a conventional filter, in which A is a vertical side view and B is a partially sectional bottom view. 1, 2... Piezoelectric resonator, 3... Input terminal board, 4
...Output terminal board, 5...Terminal board for intermediate connection, 6...
...Grounding terminal board, 7...Metal case, 8...Insulating plate.

Claims

[Scope of utility model registration request]

In a case in which a plurality of piezoelectric resonators, an input/output terminal board, a grounding terminal board, an intermediate connection terminal board, and an insulating board are housed in tandem, the case is made of metal, and the inner surface thereof is A U-shaped insulating frame is fitted to prevent the piezoelectric element and the outer periphery of each terminal plate from electrically contacting the case, and the insulating plate is made of elastic rubber and is attached to one side of the metal case. 1. A piezoelectric ceramic filter, which is press-fitted between an inner surface and an input terminal plate, and has a grounding terminal plate in contact with the other inner surface of a metal case.