JP2595378Y2 - Mounting fixture and multi-stage crystal filter using the same - Google Patents

Mounting fixture and multi-stage crystal filter using the same

Info

Publication number
JP2595378Y2
JP2595378Y2 JP1992027150U JP2715092U JP2595378Y2 JP 2595378 Y2 JP2595378 Y2 JP 2595378Y2 JP 1992027150 U JP1992027150 U JP 1992027150U JP 2715092 U JP2715092 U JP 2715092U JP 2595378 Y2 JP2595378 Y2 JP 2595378Y2
Authority
JP
Japan
Prior art keywords
base
metal
mounting
mounting fixture
holding portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP1992027150U
Other languages
Japanese (ja)
Other versions
JPH0580028U (en
Inventor
宏晶 石井
浩 藤井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nihon Dempa Kogyo Co Ltd
Original Assignee
Nihon Dempa Kogyo Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nihon Dempa Kogyo Co Ltd filed Critical Nihon Dempa Kogyo Co Ltd
Priority to JP1992027150U priority Critical patent/JP2595378Y2/en
Publication of JPH0580028U publication Critical patent/JPH0580028U/en
Application granted granted Critical
Publication of JP2595378Y2 publication Critical patent/JP2595378Y2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Description

【考案の詳細な説明】[Detailed description of the invention]

【0001】[0001]

【産業上の利用分野】本考案は多段型水晶フィルタ(多
段型フィルタとする)を利用分野とし、特に複数固の水
晶振動子を固定して表面実装用とする実装用固定具に関
する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a field of use of a multistage crystal filter (hereinafter referred to as a "multistage filter"), and more particularly to a mounting fixture for fixing a plurality of solid crystal resonators for surface mounting.

【0002】[0002]

【考案の背景】水晶フィルタ「通称MCF(Monolithic
Crystal Filter)」は、圧電材としての水晶片に生ず
る二つの振動モードの音響的結合を利用して形成され、
通信機器等にフィルタ素子として有用されている。これ
らのものでは、その伝送特性(帯域特性)の特に減衰傾
度を高めるために、縦続接続して多段型にすることが行
われている。そして、実装用固定具により一体的にし、
さらに表面実装用としたものがある。
[Background of the invention] Quartz filter "commonly known as MCF (Monolithic
Crystal Filter) is formed using the acoustic coupling of the two vibration modes that occur in the crystal piece as a piezoelectric material.
It is useful as a filter element in communication equipment and the like. In these devices, in order to increase particularly the transmission characteristics (band characteristics) of the attenuation gradient, a cascade connection is performed to form a multistage type. And it is integrated by the mounting fixture,
There is also one for surface mounting.

【0003】[0003]

【従来技術】第4図乃至第7図はこのような実装用固定
具を用いた多段型フィルタの一従来例を説明する図であ
る。水晶フィルタ1は金属ベース2とカバー3とを抵抗
溶接してなる金属容器4内に水晶片5を密閉封入してな
る。水晶片5は例えばATカットとし、他主面に入出力
電極6、7を、他主面に共通電極8を形成する。そし
て、これらに接続するリード線9、10、11を、サポ
ータ12、13及びワイヤ14を経由して、金属ベース
2から導出する「第4図の断面図」。多段型フィルタ
は、このような水晶フィルタ1(ab)を、例えば同調
回路15を介在させ、従属接続して形成される「第5図
の模式回路図」。実装用固定具16は、例えば金属平板
からなり、両端側の外部抑止部17a、17bと中央に
切り起こして設けた内部抑止部18a、18bとからな
る「第6図(a)」。そして、内外抑止部17、18に
より、各水晶フィルタ1(ab)の金属カバー3の側周
面を保持し、一体的にする「第6図(b)」。さらに、
リード線9、10、11を折曲加工し、回路基板に形成
された導電路に電気的に接続して表面実装する(未図
示)。
2. Description of the Related Art FIGS. 4 to 7 are views for explaining a conventional example of a multistage filter using such a mounting fixture. The crystal filter 1 is formed by hermetically sealing a crystal piece 5 in a metal container 4 formed by resistance welding the metal base 2 and the cover 3. The crystal blank 5 is, for example, an AT cut, and the input / output electrodes 6 and 7 are formed on the other main surface and the common electrode 8 is formed on the other main surface. Then, the lead wires 9, 10, and 11 connected thereto are led out of the metal base 2 via the supporters 12, 13 and the wires 14 (a sectional view in FIG. 4). The multi-stage filter is formed by cascade-connecting such a crystal filter 1 (ab) with, for example, a tuning circuit 15 interposed therebetween (see the “schematic circuit diagram of FIG. 5”). The mounting fixture 16 is made of, for example, a metal flat plate, and includes external restraining portions 17a and 17b at both ends and internal restraining portions 18a and 18b cut and raised at the center (FIG. 6A). Then, the inner and outer restraining portions 17 and 18 hold the peripheral surface of the metal cover 3 of each crystal filter 1 (ab) so as to be integrated, as shown in FIG. 6 (b). further,
The lead wires 9, 10, and 11 are bent and electrically connected to conductive paths formed on a circuit board for surface mounting (not shown).

【0004】[0004]

【従来技術の問題点】しかしながら、上記構成の多段型
フィルタでは、例えばリード線9、10、11を金属平
板とは反対側に折曲して(第7図)、図示しない回路基
板に真空吸着により自動装着する場合、次の問題があっ
た。すなわち、実装用固定具16の中央部分に切り起こ
しによる空隙19を有する。したがって、空激19の周
辺である端部で吸着せざるを得ない。しかし、端部では
重心がズレたり、またその面積が小さいため充分に吸着
せず、その結果自動装着を困難としていた。
However, in the multi-stage filter having the above-mentioned structure, for example, the lead wires 9, 10, and 11 are bent to the opposite side to the metal flat plate (FIG. 7), and are vacuum-adsorbed to a circuit board (not shown). In the case of automatic mounting, there is the following problem. That is, the mounting fixture 16 has a cut-and-raised gap 19 in the center. Therefore, it is inevitable to adsorb at the end, which is the periphery of the aeronautical strut 19. However, at the end, the center of gravity is displaced and the area is small, so that it is not sufficiently sucked, and as a result, automatic mounting is difficult.

【0005】[0005]

【考案の目的】本考案は、回路基板への自動装着に適し
た表面実装用の多段型フィルタを提供することを目的と
する。
SUMMARY OF THE INVENTION It is an object of the present invention to provide a multi-stage surface mount filter suitable for automatic mounting on a circuit board.

【0006】[0006]

【解決手段】本考案は、平板状の基部と、該基部の両端
側から延出して前記金属容器の側周に沿った形状の外側
保持部と、前記基部の上辺と下辺の所定位置から板面に
対して垂直方向に延出して先端側を幅広とした内側保持
部とから実装用固定具を形成したことを解決手段とす
る。以下、本考案の一実施例を説明する。
The present invention provides a flat base, an outer holding portion extending from both ends of the base and extending along the side circumference of the metal container, and a plate from a predetermined position on an upper side and a lower side of the base. A solution is to form a mounting fixture from an inner holding portion that extends in a direction perpendicular to the surface and has a wider front end side. Hereinafter, an embodiment of the present invention will be described.

【0007】[0007]

【実施例】第1図は本考案の一実施例を説明する図で、
同図(a)は実装用固定具の図、同図(b)はこれを用
いた多段型フィルタの図である。なお、前従来例図と同
一部分には同番合を付与してその説明は簡略する。実装
用固定具20は、平板状の金属板からなり、基部平板2
1と、外側保持部22と、内側保持腕23とからなる。
基部平板21は、前述した水晶フィルタ1の約2個分の
平面面積を有する。外側保持部22は、基部平板21の
両端側から延出して、金属容器の略円弧状とした側周に
沿った形状とする。内側保持腕23は、基部平板21の
上下辺の略中央からから板面に対して垂直方向に延出
し、先端部の両側を金属容器の側周に沿って幅広に形成
される。多段型フィルタは、このような実装用固定具2
0を用いて一体化される。すなわち、各水晶フィルタ1
(ab)を、実装用固定具20の開放面側から、外側保
持部22と内側保持腕23との間に、それぞれ外側保持
部22の弾性を利用して嵌挿する。なお、各リード線
9、10、11は開放面側に折曲されて、表面実装用と
する。
FIG. 1 is a diagram for explaining an embodiment of the present invention.
FIG. 1A is a diagram of a mounting fixture, and FIG. 2B is a diagram of a multi-stage filter using the same. The same parts as those in the prior art are given the same reference numerals, and the description is simplified. The mounting fixture 20 is made of a flat metal plate.
1, an outer holding part 22 and an inner holding arm 23.
The base plate 21 has a plane area of about two of the quartz filters 1 described above. The outer holding portions 22 extend from both ends of the base plate 21 and have a shape along a substantially arc-shaped side circumference of the metal container. The inner holding arm 23 extends from substantially the center of the upper and lower sides of the base plate 21 in a direction perpendicular to the plate surface, and is formed wide on both sides of the tip along the side circumference of the metal container. The multi-stage filter has such a mounting fixture 2.
0 is integrated. That is, each crystal filter 1
(Ab) is inserted between the outer holding portion 22 and the inner holding arm 23 from the open surface side of the mounting fixture 20 by utilizing the elasticity of the outer holding portion 22, respectively. Note that each of the lead wires 9, 10, and 11 is bent toward the open surface and is used for surface mounting.

【0008】このような構成であれば、各水晶フィルタ
は外側保持部22と内側保持腕23により挟持されて、
その離脱を防止し一体的に保持できる。そして、基部平
板21は、従来例のように空隙を存することがないの
で、中央部での真空吸着を可能にする。したがって、バ
ランスをくずすことなく、充分な吸着面積を確保でき
て、回路基板に対する自動装着を容易にする。
With such a configuration, each crystal filter is sandwiched between the outer holding portion 22 and the inner holding arm 23,
The detachment can be prevented and can be held integrally. Since the base plate 21 does not have a gap as in the conventional example, vacuum suction can be performed at the central portion. Accordingly, a sufficient suction area can be secured without breaking the balance, and automatic mounting on the circuit board is facilitated.

【0008】[0008]

【他の事項】上記実施例では、内側保持腕23は端に上
下辺から延出するとしたが、例えば金属平板の厚みを考
慮して、切込み24を設けた上で延出してもよい「第3
図(a)」。この場合、上下辺の両側に対称に形成し、
方向性を無視できるようにした方が便利である。また、
内側保持腕23の先端を折曲して表面実装用の端子部2
5を形成してもよい「第3図(b)」。さらには、水晶
フィルタの入出力間の電気的結合を防止する遮蔽板を切
り起こしにより設けてもよい(未図示)。そして、水晶
フィルタを2個とした多段接続としたが、例えば内側保
持腕23を所定位置に複数形成し(未図示)、3個以上
の水晶フィルタを多段接続してもよいものである。
[Other Matters] In the above embodiment, the inner holding arm 23 extends from the upper and lower sides at the end. However, for example, in consideration of the thickness of the metal flat plate, the inner holding arm 23 may be provided with a notch 24 to extend. 3
Figure (a) ". In this case, it is formed symmetrically on both sides of the upper and lower sides,
It is more convenient to be able to ignore the direction. Also,
The tip of the inner holding arm 23 is bent to form a terminal 2 for surface mounting.
5 (FIG. 3B). Further, a shield plate for preventing electrical coupling between the input and output of the crystal filter may be provided by cutting and raising (not shown). In addition, although the multistage connection with two crystal filters is employed, for example, a plurality of inner holding arms 23 may be formed at predetermined positions (not shown), and three or more crystal filters may be connected in multistage.

【0009】[0009]

【考案の効果】本考案は、平板状の基部と、該基部の両
端側から延出して前記金属容器の側周に沿った形状の外
側保持部と、前記基部の上辺と下辺の所定位置から板面
に対して垂直方向に延出して先端側を幅広とした内側保
持部とから実装用固定具を形成したので、回路基板への
自動装着に適した表面実装用の多段型フィルタを提供で
きる。
According to the present invention, there is provided a flat base, an outer holding portion extending from both ends of the base and extending along the side circumference of the metal container, and a predetermined position on the upper side and the lower side of the base. Since the mounting fixture is formed from the inner holding portion extending in the direction perpendicular to the board surface and having a wide distal end, a multistage filter for surface mounting suitable for automatic mounting on a circuit board can be provided. .

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

【第1図】本考案の一実施例を説明する実装用固定具の
図である。
FIG. 1 is a view of a mounting fixture for explaining an embodiment of the present invention.

【第2図】本考案の一実施例を説明する実装用固定具を
用いた多段型フィルタの図である。
FIG. 2 is a view of a multi-stage filter using a mounting fixture for explaining an embodiment of the present invention.

【第3図】同図(ab)ともに本考案の他の実施例を説
明する実装用固定具の図である。
FIG. 3 (ab) is a view of a mounting fixture for explaining another embodiment of the present invention.

【第4図】従来例を説明する水晶フィルタの断面図であ
る。
FIG. 4 is a cross-sectional view of a quartz filter for explaining a conventional example.

【第5図】従来例を説明する水晶フィルタの回路図であ
る。
FIG. 5 is a circuit diagram of a crystal filter for explaining a conventional example.

【第6図】同図(a)は従来例を説明する実装用固定具
の図、同図(b)はこれを用いた多段型フィルタの図で
ある。
FIG. 6 (a) is a diagram of a mounting fixture for explaining a conventional example, and FIG. 6 (b) is a diagram of a multi-stage filter using the same.

【第7図】従来例を説明する表面実装用とした多段型フ
ィルタの図である。
FIG. 7 is a diagram of a multi-stage filter for surface mounting explaining a conventional example.

【符号の説明】[Explanation of symbols]

1 水晶フィルタ、2 金属ベース、3 金属カバー、
4 金属ケース、5水晶片、6 入力電極、7 出力電
極、8 共通電極、9、10、11 リード線、12、
13 サポータ、14 ワイヤ、15 同調回路、1
6、20 実装用固定具、17 外部抑止部、18 内
部抑止部、21 基部平板、22 外側保持部、23
内側保持腕、24 切込み、25 端子部.
1 crystal filter, 2 metal base, 3 metal cover,
4 Metal case, 5 crystal pieces, 6 input electrodes, 7 output electrodes, 8 common electrodes, 9, 10, 11 lead wires, 12,
13 supporters, 14 wires, 15 tuning circuits, 1
6, 20 mounting fixture, 17 external restraining portion, 18 internal restraining portion, 21 base plate, 22 outer holding portion, 23
Inside holding arm, 24 notches, 25 terminals.

Claims (2)

(57)【実用新案登録請求の範囲】(57) [Scope of request for utility model registration] 【請求項1】リード線の導出した金属ベースとカバーと
からなる金属容器内に水晶片を封入して形成される水晶
フィルタの複数個をその幅方向に並設し、前記複数個の
水晶フィルタを回路基板上に表面実装するための実装用
固定具において、前記複数の金属容器の上面を覆う平板
状の基部と、前記基部の両端部から前記複数の金属容器
の両端側の外周側に沿って前記回路基板と対向する面と
なる前記金属容器の下面方向に延出する外側保持部と、
前記基部の上辺と下辺の所定位置から該基部の板面に対
して垂直方向に前記複数の金属容器の内周側に沿って延
出する先端側を幅広とした内側保持部とからなる実装用
固定具。
1. A plurality of quartz filters formed by enclosing quartz pieces in a metal container comprising a metal base from which lead wires are led and a cover, and formed in parallel with each other in the width direction thereof. A mounting base for surface-mounting the plurality of metal containers on a circuit board, a flat base covering the upper surfaces of the plurality of metal containers, and extending from both ends of the base along the outer peripheral sides of both ends of the plurality of metal containers. An outer holding portion extending in the direction of the lower surface of the metal container, which is a surface facing the circuit board,
For mounting, comprising a wide inner end portion extending from a predetermined position on the upper side and lower side of the base along the inner peripheral side of the plurality of metal containers in a direction perpendicular to the plate surface of the base. Fixture.
【請求項2】請求項1における前記実装用固定具の平板
状の基部が請求項1における前記複数の金属容器の上面
を覆い、請求項1における前記外側保持部と前記内側保
持部とにより前記金属容器の外側周と内側周とを挟持し
てなる多段型水晶フィルタ。
2. A cover the upper surface of the plurality of metal containers tabular base portion of the mounting fixture of claim 1 in claim 1, wherein the said outer holding portion of claim 1 and wherein the inner holding portion A multi-stage crystal filter sandwiching the outer and inner circumferences of a metal container.
JP1992027150U 1992-03-31 1992-03-31 Mounting fixture and multi-stage crystal filter using the same Expired - Fee Related JP2595378Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1992027150U JP2595378Y2 (en) 1992-03-31 1992-03-31 Mounting fixture and multi-stage crystal filter using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1992027150U JP2595378Y2 (en) 1992-03-31 1992-03-31 Mounting fixture and multi-stage crystal filter using the same

Publications (2)

Publication Number Publication Date
JPH0580028U JPH0580028U (en) 1993-10-29
JP2595378Y2 true JP2595378Y2 (en) 1999-05-31

Family

ID=12213024

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1992027150U Expired - Fee Related JP2595378Y2 (en) 1992-03-31 1992-03-31 Mounting fixture and multi-stage crystal filter using the same

Country Status (1)

Country Link
JP (1) JP2595378Y2 (en)

Also Published As

Publication number Publication date
JPH0580028U (en) 1993-10-29

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