JPH0614504Y2 - Ceramic filter - Google Patents

Description

【考案の詳細な説明】 「産業上の利用分野」 本考案は、プリント配線基板に半田等の鑞着によって接
続される端子脚をそれぞれ突設した入，出力端子板を具
えたセラミックフイルタに関するものである。[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a ceramic filter having an input / output terminal plate in which terminal legs connected to a printed wiring board by brazing such as solder are projected. Is.

「従来技術」 この種のセラミックフイルタは、ケース内に直列共振子
と並列共振子を入，出力端子板を含む端子板及び必要に
応じて挿入される絶縁板とともに所望の濾波回路を構成
するように積層、整列してケース内に封入し、入，出力
端子板から該ケースの開口部にそれぞれ突出した細長い
端子脚を、通常は同じくケースの開口部端縁から突設し
た細長い接地端子脚とともに形成し、これら３者の端子
脚をプリント配線基板にサーフェイスマウント方式によ
って接続するようになっている。"Prior Art" This type of ceramic filter has a case in which a series resonator and a parallel resonator are put in a case, and a desired filtering circuit is configured with a terminal plate including an output terminal plate and an insulating plate inserted as necessary. The elongated terminal legs that are stacked, aligned, and enclosed in the case, and that project from the input and output terminal plates to the opening of the case, respectively, are usually used together with the elongated ground terminal legs that project from the edge of the opening of the case. They are formed and the terminal legs of these three are connected to the printed wiring board by the surface mount method.

「考案が解決しようとする問題点」 上記一対の入，出力端子脚は、上記ケースの開口部端縁
から好ましくは同一の寸法（高さ）に折曲げられた第１
の折曲部と、同じく開口部端縁から突設した接地端子脚
と同一平面上にあり、好ましくは該端縁からの突出寸法
をも同一とした第２の折曲部とからなるクランク状に形
成される。[Problems to be Solved by the Invention] The pair of input and output terminal legs are preferably bent to the same size (height) from the edge of the opening of the case.
And a second bent portion that is on the same plane as the ground terminal leg that also projects from the end edge of the opening and preferably has the same protruding dimension from the end edge. Is formed.

しかして、入，出力端子板はケース内において濾波回路
を構成する共振子、中間端子板を介して配される関係か
ら、これら端子板から引出される端子脚の折曲前の長さ
が必然的に異なるが、共振子が二素子型、三素子型のよ
うに少ない場合における両者の脚長差は１mm程度にすぎ
ないため、組付時において入力端子板と出力端子板を逆
に挿入することが往々にあり、最終工程において両者の
端子脚を上記の接地端子脚と対応するクランク状に折曲
げることができず、歩留りに難があった。However, since the input and output terminal plates are arranged via the resonator and the intermediate terminal plate that configure the filtering circuit in the case, the length before bending of the terminal legs pulled out from these terminal plates is inevitable. However, the leg length difference between them is only about 1 mm when there are few resonators such as two-element type and three-element type, so insert the input terminal plate and output terminal plate in reverse when assembling. However, in the final step, both terminal legs could not be bent into a crank shape corresponding to the above-mentioned ground terminal legs, and the yield was difficult.

「問題点を解決するための手段」 入力端子板と出力端子板を識別する切欠部をいずれの端
子板の端子脚に設ける。"Means for solving the problem" A cutout for identifying the input terminal plate and the output terminal plate is provided on the terminal leg of either terminal plate.

「実施例」 図面は大容量の共振子と小容量の共振子を用いて第３図
のＴ接続型濾波回路に接続したセラミックフイルタを本
考案の多素子型の代表例として示し、第１図において１
ａ，１ａ′はチタン酸ジルコン酸鉛系化合物等の圧電磁
器からなり両主表面に金属化電極面を銀焼付け等によっ
て形成し、分極された一対の小容量の直列共振子、１ｂ
は該直列共振子と同様に製作された大容量の並列共振子
でこれら直，並列の共振子の容量値は、図のように肉厚
によるか、同一の肉厚として図示しない金属化面の面積
によって制御する。２ａ〜２ｃ′はこれら共振子と、そ
の振動の節部においてそれぞれに設けた小突起によって
当接、電気的に導通する各端子板を示し、２ａは前段の
直列共振子１ａと接続する入力端子板、２ｂは該前段の
直列共振子１ａと、第１の中間端子板２ｃを介して出力
端子板２ａ′に接続する後段の直列共振子１ａ′を直列
に接続するとともに、並列共振子１ｂの前面をこれら前
後段の直列共振子１ａと１ａ′の間に接続する該前段の
直列共振子１ａと並列共振子１ｂの間に挿入された断面
コの字の連結端子板を示し、第２図に分解して斜視図で
示したように該連結端子板２ｂの中には上記第１の中間
端子板２ｃ、第２の直列共振子１ａ′、出力端子板２
ａ′及び該連結端子板２ｂと出力端子板２ａ′の間を絶
縁する絶縁板３が積層，挿入され、上記入力端子板２ａ
の前面には緩衝板を兼ねる絶縁板３ｂ、並列共振子１ｂ
の背面には第２の中間端子板２ｃ′を積層し、該第２の
端子板２ｃ′と内接、導通する金属のケース４内に収納
し、該金属ケースから突設した接地端子脚４１に対応し
て上記入力端子板２ａ，出力端子板２ａ′からそれぞれ
突設し、接続すべきプリント配線基板ｐの導電部ｃに対
応して折曲げられる入力端子脚２１ａ，出力端子脚２１
ａ′によって第３図のＴ接続型濾波回路を構成する。"Embodiment" The drawing shows a ceramic filter connected to the T-connection type filtering circuit of FIG. 3 using a large capacity resonator and a small capacity resonator as a typical example of the multi-element type of the present invention. At 1
a and 1a 'are composed of piezoelectric ceramics such as lead zirconate titanate compounds, and metalized electrode surfaces are formed on both main surfaces by silver baking etc., and a pair of polarized small capacity series resonators 1b.
Represents a large-capacity parallel resonator manufactured in the same manner as the series resonator, and the capacitance value of the direct and parallel resonators depends on the wall thickness as shown in the figure, or the metal wall of the metallized surface (not shown) has the same wall thickness. Control by area. Reference numerals 2a to 2c 'denote these resonators and respective terminal plates that are brought into contact with and electrically connected to each other by small protrusions provided at the nodes of vibration of the resonators. 2a denotes an input terminal connected to the preceding-stage series resonator 1a. The plates and 2b connect the preceding-stage series resonator 1a and the succeeding-stage series resonator 1a 'connected to the output terminal plate 2a' through the first intermediate terminal plate 2c in series, and connect the parallel resonator 1b with the parallel resonator 1b. 2 shows a connecting terminal plate having a U-shaped cross section inserted between the series resonator 1a of the preceding stage and the parallel resonator 1b whose front face is connected between the series resonators 1a and 1a 'of the preceding and following stages, and FIG. As shown in a perspective view by disassembling into the above, the first intermediate terminal plate 2c, the second series resonator 1a ', the output terminal plate 2 are included in the connecting terminal plate 2b.
a 'and an insulating plate 3 for insulating between the connecting terminal plate 2b and the output terminal plate 2a' are laminated and inserted, and the input terminal plate 2a
Insulating plate 3b also serving as a buffer plate, parallel resonator 1b on the front side of the
A second intermediate terminal plate 2c 'is laminated on the back surface of the housing, housed in a metal case 4 that is inscribed in and in contact with the second terminal plate 2c', and is grounded to a ground terminal leg 41 protruding from the metal case. Corresponding to the above, the input terminal plate 2a and the output terminal plate 2a 'respectively project from the input terminal plate 2a and the output terminal plate 2a', and are bent corresponding to the conductive portions c of the printed wiring board p to be connected.
The T-connection type filter circuit of FIG. 3 is constituted by a '.

なお、５は濾波回路を構成する上記の積層体を主表面と
直角の縁辺を絶縁、保護する絶縁枠であるが省略するこ
とができ、またケース１を絶縁材料で製作した場合は第
２の中間端子板２ｃ′を接地端子板としてこれから接地
端子脚に延設し、緩衝板を兼ねる絶縁板３ｂを省略する
ことができ、いずれの場合も第１の中間端子板２ｃは連
結端子板２ｂを折曲げて一体に製作してもよい。Reference numeral 5 is an insulating frame for insulating and protecting the edge of the above laminated body forming the filtering circuit at right angles to the main surface, but it can be omitted, and if the case 1 is made of an insulating material, it can be omitted. The intermediate terminal plate 2c 'can be used as a ground terminal plate and extended from this to the ground terminal leg, and the insulating plate 3b also serving as a buffer plate can be omitted. In either case, the first intermediate terminal plate 2c does not have the connecting terminal plate 2b. It may be bent and integrally manufactured.

次に、６は紙、プラスチックフイルム等からなり、上記
の入力端子脚２１ａと出力端子脚２１ａ′を折曲げる前
において挿通するとともにケース４の内壁面に密接し、
その外方に充填して内部の濾波回路要素を密封するとと
もに上記ケース４の開口端から突出する入力端子脚２１
ａ，出力端子脚２１ａ′及び接地端子脚４１の相互の絶
縁を保持するエポキシ樹脂等の絶縁封止部材７の内部へ
の侵入を防止する絶縁薄膜である。Next, 6 is made of paper, plastic film or the like, and is inserted through the input terminal leg 21a and the output terminal leg 21a 'before being bent and closely contacted with the inner wall surface of the case 4,
An input terminal leg 21 that is filled outside to seal the inside of the filtering circuit element and projects from the open end of the case 4.
a, an insulating thin film for preventing the intrusion of the insulating sealing member 7 such as an epoxy resin for holding the mutual insulation of the output terminal leg 21a 'and the ground terminal leg 41 into each other.

上記の絶縁封止部材７を充填、硬化した後、ケース４の
開口部から突出した入，出力端子の端子脚２１ａ，２１
ａ′を、該ケース開口部から突出した接地端子脚４１と
ともにプリント配線基板ｐの導電部ｃにロー着するよ
う、クランク状に折曲げることによって組付けが完了す
る。After the insulating sealing member 7 is filled and cured, the terminal legs 21a, 21 of the input / output terminals protruding from the opening of the case 4 are provided.
The assembly is completed by bending a'in a crank shape so as to be brazed to the conductive portion c of the printed wiring board p together with the ground terminal leg 41 protruding from the case opening.

この種の多素子型濾波回路は上記のＴ接続型に限らず、
逆のπ接続型、あるいは直，並列端子版を各１枚とした
Ｌ型、逆Ｌ型等があり、目的に応じて選択されるが、本
考案はそれら濾波回路中の入力端子板と出力端子板を確
実に識別して配列を誤まらせないよう、ケースに収納前
又は収納後において目視しうるこれら端子板の端子脚側
に、例えば図示のように入力端子２ａの入力端子脚２１
ａを突設した側の端縁に標識となる切欠部２２を設け
る。This kind of multi-element type filtering circuit is not limited to the above T connection type,
There are an inverted π-connection type, an L type with one direct and parallel terminal version, an inverse L type, etc., which can be selected according to the purpose, but the present invention is the input terminal board and output in those filtering circuits. In order to surely identify the terminal plates and prevent the arrangement from being mistaken, the input terminal legs 21 of the input terminal 2a are provided on the terminal leg side of these terminal plates which can be visually checked before or after being stored in the case, for example.
A notch 22 serving as a marker is provided at the end edge on the side where a is projected.

しかして、上記の端子脚側に設ける標識は図示の該端子
脚の基部となる端縁の一部をＶ字状に切欠したが、これ
に限らず端子脚の基部となる端縁と隣接する端縁との隅
角部の他、端子脚の先端又は付近を部分的に切欠しても
よい。Although the above-mentioned mark provided on the terminal leg side is notched in a V-shape at a part of the end edge serving as the base portion of the terminal leg shown in the drawing, the present invention is not limited to this, and is adjacent to the end edge serving as the base portion of the terminal leg. In addition to the corner portion with the edge, the tip or the vicinity of the terminal leg may be partially cut away.

「考案の効果」 上記の端子板を使用した本考案のセラミックフイルタ
は、入力端子板と出力端子板の識別が容易、確実となっ
て、量産性を高めるとともに歩留りを向上して製造原価
を引下げる効果がある。"Effect of the device" The ceramic filter of the present invention using the above-mentioned terminal board can easily and reliably distinguish the input terminal board from the output terminal board, improving the mass productivity and improving the yield to reduce the manufacturing cost. There is an effect.

【図面の簡単な説明】[Brief description of drawings]

第１図は本考案のセラミックフイルタの実施例を示す組
立図で、同図Ａは一部を切欠して示した正面図、同図Ｂ
は縦断面図、同図Ｃは下面図、第２図は同じく本考案の
構成部材の斜視図、また第３図は本考案の実施例に用い
たＴ接続型濾波回路図である。 １ａ，１ａ′……直列共振子、１ｂ……並列共振子、２
ａ……入力端子板、２ａ′……出力端子板、２１ａ……
入力端子脚、２１ａ′……出力端子脚、２２……標識、
４……ケース、６……絶縁薄膜、７……絶縁封止剤FIG. 1 is an assembly view showing an embodiment of a ceramic filter of the present invention, and FIG. 1A is a front view with a part cut away, and FIG.
Is a longitudinal sectional view, FIG. 2C is a bottom view, FIG. 2 is a perspective view of the constituent members of the present invention, and FIG. 3 is a T-connection type filtering circuit diagram used in an embodiment of the present invention. 1a, 1a '... series resonator, 1b ... parallel resonator, 2
a: input terminal board, 2a '... output terminal board, 21a ...
Input terminal leg, 21a '... Output terminal leg, 22 ... Mark,
4 ... Case, 6 ... Insulating thin film, 7 ... Insulating sealant

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭54−8438（ＪＰ，Ａ) 特開 昭58−89739（ＪＰ，Ａ) 実開 昭59−11454（ＪＰ，Ｕ) 実開 昭57−78122（ＪＰ，Ｕ) 実開 昭61−90317（ＪＰ，Ｕ) 実公 昭59−24181（ＪＰ，Ｙ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-54-8438 (JP, A) JP-A-58-89739 (JP, A) Actually open Sho-59-11454 (JP, U) Actual-open Sho-57- 78122 (JP, U) Actually open 61-90317 (JP, U) Actually open 59-24181 (JP, Y2)

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】直，並列の共振子１ａ，１ｂ及び、これら
共振子の振動節部と当接する小突起を有する端子板を具
えて整列、積層した多素子型濾波回路要素をケース４内
に収納し、該ケースの開口部から外方に突出する入力端
子板２ａ及び出力端子板２ａ′の端子脚２１ａ及び２１
ａ′を挿通する絶縁薄膜６及び該薄膜上の絶縁封止剤７
によって封塞するものにおいて、上記ケースの開口部か
ら多素子型濾波回路要素の入力端子板２ａと出力端子板
２ａ′を識別する、これら端子板のいずれか一方の端子
脚側に標識２２を設けたことを特徴とするセラミックフ
ィルタ。1. A case 4 is a multi-element type filtering circuit element, which is arranged and laminated, comprising a series of parallel and parallel resonators 1a, 1b and a terminal plate having small protrusions that come into contact with the vibration nodes of these resonators. The terminal legs 21a and 21 of the input terminal plate 2a and the output terminal plate 2a 'which are housed and project outward from the opening of the case.
Insulating thin film 6 for inserting a'and insulating sealant 7 on the thin film
In order to identify the input terminal plate 2a and the output terminal plate 2a 'of the multi-element type filtering circuit element from the opening of the case, a mark 22 is provided on one of the terminal legs of these terminal plates. Ceramic filter characterized by