JPH0543446Y2 - - Google Patents
Info
- Publication number
- JPH0543446Y2 JPH0543446Y2 JP1987147101U JP14710187U JPH0543446Y2 JP H0543446 Y2 JPH0543446 Y2 JP H0543446Y2 JP 1987147101 U JP1987147101 U JP 1987147101U JP 14710187 U JP14710187 U JP 14710187U JP H0543446 Y2 JPH0543446 Y2 JP H0543446Y2
- Authority
- JP
- Japan
- Prior art keywords
- base plate
- coil
- plastic material
- plate
- outer case
- 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 - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 15
- 238000004804 winding Methods 0.000 claims description 6
- 238000005476 soldering Methods 0.000 description 13
- 229910000679 solder Inorganic materials 0.000 description 8
- 239000002904 solvent Substances 0.000 description 6
- 238000003466 welding Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
Landscapes
- Coils Or Transformers For Communication (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は、通信機器、制御機器用のハイブリツ
ドIC用として用いられる表面実装型コイル部品
の改良に関するものである。[Detailed Description of the Invention] Industrial Application Field The present invention relates to improvements in surface-mounted coil components used for hybrid ICs for communication equipment and control equipment.
従来の技術
一般に、トランスを表面実装型コイル部品とし
て例示すると、それは第４図で示すようにボビン
１の巻軸部と一体成形された端子台２に外部端子
３，３……を突出装着し、このボビン１の巻軸部
に巻装されるコイル４の端末を外部端子３，３…
…の軸線上に絡げ止めると共に、コア５をボビン
１に組み付けることにより構成されている。2. Description of the Related Art In general, when a transformer is exemplified as a surface-mounted coil component, it has external terminals 3, 3, . , the ends of the coil 4 wound around the winding shaft of the bobbin 1 are connected to external terminals 3, 3...
It is constructed by assembling the core 5 to the bobbin 1 while binding it on the axis of the bobbin 1.
そのトランスは何らの部材で被覆することなく
裸のままであると、回路組立工程中でウエーブソ
ルダリング或いはリフローソルダリング等を行う
時の耐半田性や耐溶剤性に劣り、また、実装後の
耐湿性等からも信頼性に欠ける。 If the transformer is left bare without being covered with any material, it will have poor solder resistance and solvent resistance when wave soldering or reflow soldering is performed during the circuit assembly process, and it will also have poor solder resistance and solvent resistance after mounting. It also lacks reliability due to moisture resistance, etc.
このため、従来、耐熱性を有する絶縁性のプラ
スチツク材料でプリント基板に半田付け固定され
る外部端子の軸端部を除く全体をモールド成形す
ることが提案されている（実公昭54−7320号）。 For this reason, it has been proposed to mold the entire external terminal except for the shaft end, which is soldered and fixed to the printed circuit board, using heat-resistant insulating plastic material (Utility Model Publication No. 54-7320). .
然し、この表面実装型のコイル部品をプラスチ
ツク材料でモールド成形するときにはプラスチツ
ク材料の硬化に伴う応力や温度変化による膨張、
収縮に伴う応力で磁気的特性を変化させてしまう
事態が生ずる。 However, when molding this surface-mounted coil component with plastic material, stress due to hardening of the plastic material and expansion due to temperature changes,
A situation arises in which the magnetic properties change due to the stress associated with contraction.
それが開磁路の低インピーダンスなコイル部品
であると、多少の特性劣化は許容できるものの、
閉磁路を形成するコイル部品にあつては上述した
応力の作用でコアが離間され或いは破壊されるこ
とにより磁気的特性を著しく劣化する事態が生ず
るところからプラスチツク材料によるモールド成
形を全く適用することができない。 If it is a low impedance coil component with an open magnetic path, some deterioration in characteristics can be tolerated, but
For coil parts that form a closed magnetic circuit, molding using plastic materials cannot be applied at all, since the cores may be separated or destroyed by the stress described above, resulting in significant deterioration of magnetic properties. Can not.
従つて、低インピーダンスな開磁路を形成する
コイル部品以外は依然として裸のまま実装し、ま
た、他の部品を自動装着した後に手半田で処理す
ることが行われている。然し、これでは実装に極
めて手間が掛るばかりでなく、上述した如く実装
後の耐湿性、その他の信頼性に欠けるところから
好ましくない。 Therefore, components other than the coil components that form a low-impedance open magnetic path are still mounted bare, and other components are automatically attached and then soldered manually. However, this is not preferable because it not only takes a lot of time to mount, but also lacks moisture resistance and other reliability after mounting as described above.
本考案が解決しようとする課題
本考案は、磁気的特性等を損なうことなく、耐
半田性、耐溶剤性、耐湿性等を保て信頼性が高く
しかも簡単に組立可能な表面実装型のコイル部品
を提供することを目的とする。Problems to be solved by the present invention The present invention is a surface-mounted coil that maintains solder resistance, solvent resistance, moisture resistance, etc. without impairing magnetic properties, is highly reliable, and is easy to assemble. The purpose is to provide parts.
課題を解決するための手段
本考案に係る表面実装型のコイル部品において
は、コイルをボビンの巻軸部に巻装し、そのコイ
ルの端末をボビンの端子台に装着された導出端子
の軸線上に絡げ止め、更に、コアを該ボビンに組
み付けてなるコイル組立体を外装ケースの内部に
気密に封止するべく、
耐熱性を有する絶縁性のプラスチツク材料で形
成されたベース板と、このベース板と同材質のプ
ラスツチク材料で形成されたキヤツプ状のカバー
部と、内軸端側を板面上に露出位置し且つ外軸端
側を板底面から側方に折曲位置させてベース板に
埋込み装着された表面実装用の外部端子とを有す
る外装ケースを備え、
上記コイル組立体の導出端子を外装ケースのベ
ース板に埋込み装着された外部端子の内軸端上に
重合固定させて、当該コイル組立体をベース板の
板面上に取付け固定すると共に、このベース板の
板面上に固定装着されるカバー部の空間内に収容
位置させて外装ケースで気密に封止することによ
り構成されている。Means for Solving the Problems In the surface-mounted coil component according to the present invention, the coil is wound around the winding shaft of the bobbin, and the end of the coil is placed on the axis of the lead-out terminal attached to the terminal block of the bobbin. A base plate made of a heat-resistant insulating plastic material and a base plate made of a heat-resistant insulating plastic material are used to prevent the core from being tied to the bobbin and to hermetically seal the coil assembly formed by assembling the core to the bobbin inside the outer case. A cap-shaped cover part made of the same plastic material as the plate is attached to the base plate with the inner shaft end side exposed on the plate surface and the outer shaft end side bent sideways from the bottom surface of the plate. an outer case having an external terminal for surface mounting embedded in the base plate of the outer case; The coil assembly is installed and fixed on the plate surface of the base plate, and is housed in the space of the cover part fixedly attached on the plate surface of the base plate, and is hermetically sealed with an exterior case. ing.
作 用
この表面実装型のコイル部品では、予め一つの
部品形態に構成されたコイル組立体の導出端子と
は別に、外装ケースにも表面実装用の外部端子を
備えて、コイル組立体の導出端子を外装ケースの
外部端子に重合固定することによりコイル組立体
をベース板の板面上に取付け固定するから、その
組立時にはコイルの端末を外部端子に絡げ付ける
等の手間が掛らない。また、このコイル組立体を
密封するカバー部はベース板の板面上に固定装着
することにより外装ケースとして形成するもので
あるから、外装ケースを含む全体を一つの部品完
成体として容易に組み立てることができる。Function In this surface mount type coil component, in addition to the lead-out terminal of the coil assembly which is configured in advance in the form of one component, the outer case is also provided with an external terminal for surface mounting, and the lead-out terminal of the coil assembly is provided with an external terminal for surface mounting. The coil assembly is mounted and fixed on the plate surface of the base plate by overlapping and fixing it to the external terminal of the exterior case, so there is no need for the effort of tying the end of the coil to the external terminal during assembly. In addition, since the cover part that seals this coil assembly is fixedly mounted on the plate surface of the base plate to form an exterior case, the entire body including the exterior case can be easily assembled as one complete component. I can do it.
そのコイル組立体は外装ケースの空間内に収容
位置されているから、自動実装の際にウエーブソ
ルダリングやリフローソルダリングを適用しても
半田溶液や溶剤に直接触れることがなく、溶融半
田からの熱がコイル組立体に伝搬するのも遮断で
きることにより熱的損壊が生ずるのを妨げる。ま
た、このコイル組立体は外装ケースで気密に封止
されているから、実装後でも湿気に晒されるのを
妨げることにより極めて信頼性の高い表面実装型
コイル部品として構成することができる。 Since the coil assembly is housed within the space of the outer case, it does not come into direct contact with solder solution or solvent even when wave soldering or reflow soldering is applied during automatic mounting, and it is free from molten solder. Heat can also be blocked from propagating to the coil assembly, thereby preventing thermal damage from occurring. Further, since this coil assembly is hermetically sealed with an outer case, it is prevented from being exposed to moisture even after mounting, and can be constructed as an extremely reliable surface-mounted coil component.
実施例
以下、第１〜３図を参照して説明すれば、次の
通りである。Embodiments The following description will be made with reference to FIGS. 1 to 3.
第１図で示す表面実装型のコイル部品は、第４
図で示すと同様な構造を有するコイル組立体１０
を一部品として備えることにより構成されてい
る。このコイル組立体１０はボビン１００の巻軸
部１００ａと一体成形され端子台１００ｂに導出
端子１０１，１０１……を突出装着し、その導出
端子１０１，１０１……の軸線上にボビン１００
の巻軸部１００ａに巻装されたコイル１０２の端
末を絡げ止めると共に、コア１０３をボビン１０
０に組み付けて構成されている。また、この表面
実装型のコイル部品は外部端子１１，１１……が
埋込み装着されたベース板１２ａを底部とする外
装ケース１２の空間内にコイル組立体１０を収容
位置することにより組み立てられている。 The surface-mounted coil component shown in Figure 1 has a fourth
Coil assembly 10 having a similar structure as shown in the figures
It is constructed by having as one part. This coil assembly 10 is integrally molded with the winding shaft portion 100a of the bobbin 100, and the lead-out terminals 101, 101... are attached to the terminal block 100b so as to protrude, and the bobbin 100 is mounted on the axis of the lead-out terminals 101, 101...
At the same time, the end of the coil 102 wound around the winding shaft portion 100a of
It is assembled into 0. Furthermore, this surface-mounted coil component is assembled by housing the coil assembly 10 in a space of an exterior case 12 whose bottom is a base plate 12a in which external terminals 11, 11, . . . are embedded. .
その外装ケース１２は、耐熱性を有する絶縁性
のプラスチツク材料でなるベース板１２ａをター
ミナルベースとして形成されている。そのベース
板１２ａの成形時には、第２図で示すように内外
の各軸端１１ａ，１１ａ……，１１ｂ，１１ｂ…
…を板面上に露出させて外部端子１１，１１……
を一体的に埋込み装着するようにされている。そ
の外部端子１１は軸内端側１１ａ，１１ａ……を
後述するようにコイル組立体１０の導出端子１０
１，１０１……と重合固定できるようベース板１
２ａの板内面上に折り曲げ、また、軸外端側１１
ｂ，１１ｂ……を表面実装用のフラツト端子とし
て形成するよう板外面から側方に折り曲げること
により埋込み装着されている。このベース板１２
ａを含む外装ケース１２はベース板１２ａと一体
に立上げ成形された略方形の枠縁部１２ｂと、ベ
ース板１２ａと同材質のプラスチツク材料で形成
されたキヤツプ状のカバー部１２ｃとからなる。 The exterior case 12 is formed using a base plate 12a made of a heat-resistant and insulating plastic material as a terminal base. When forming the base plate 12a, each of the inner and outer shaft ends 11a, 11a..., 11b, 11b...
External terminals 11, 11... are exposed on the board surface.
It is designed to be integrally embedded and installed. The external terminal 11 is connected to the lead-out terminal 10 of the coil assembly 10 as described later on the shaft inner end side 11a, 11a...
Base plate 1 so that it can be fixed by overlapping with 1,101...
2a on the inner surface of the plate, and also the shaft outer end side 11
b, 11b, . . . are embedded and mounted by bending them laterally from the outer surface of the plate to form flat terminals for surface mounting. This base plate 12
The exterior case 12 including the base plate 12a includes a substantially rectangular frame edge portion 12b that is upright formed integrally with the base plate 12a, and a cap-shaped cover portion 12c made of the same plastic material as the base plate 12a.
その外装ケース１２に対してコイル組立体１０
を組み付けるには、ベース板１２ａの板面に露出
する外部端子１１，１１……の内軸端１１ａ，１
１ａ……とコイル組立体１０の導出端子１０１，
１０１……を重合させて半田付け固定する。その
半田付け固定を行うにはクリーム半田を外部端子
１１，１１……の内軸端１１ａ，１１ａ……に付
着し、コイル組立体１０の導出端子１０１，１０
１……を外部端子１１，１１……の内軸端１１
ａ，１１ａ……と重ね合せ、コイル組立体１０を
ベース板１２上に載置してからリフローソルダリ
ングを適用すればよい。この後に、第３図で示す
如く外装ケース１２のカバー部１２ｃを枠縁部１
２ｂに嵌め合わせて互いを気密に接合することに
より、コイル組立体１０を外装ケース１２の空間
内に収容するよう外装ケース１２を組み立てる。
このカバー部１２の接合にあたつては枠縁部１２
ｂ、カバー部１２ｃのフランジ部間に加熱溶着で
きるフイルム状の接着剤を介装し或いは超音波溶
着。高周波溶着を適用でき、その接合個所はコイ
ル組立体１０をベース板１２ａに搭載する時の半
田付け処理に支障とならない程度に高位な位置に
設定すれば、外部端子１１，１１……のプリント
基板に対する自動半田付け処理の影響を受け難く
できるところから好ましい。 The coil assembly 10 is attached to the outer case 12.
To assemble the inner shaft ends 11a, 1 of the external terminals 11, 11... exposed on the plate surface of the base plate 12a.
1a... and the lead-out terminal 101 of the coil assembly 10,
101... are polymerized and fixed by soldering. To fix it by soldering, cream solder is applied to the inner shaft ends 11a, 11a, . . . of the external terminals 11, 11, .
1... to the inner shaft end 11 of the external terminals 11, 11...
a, 11a, . . . and place the coil assembly 10 on the base plate 12, and then apply reflow soldering. After this, as shown in FIG. 3, the cover part 12c of the outer case 12 is
The outer case 12 is assembled so that the coil assembly 10 is accommodated in the space of the outer case 12 by fitting the coil assembly 10 into the outer case 2b and joining them together airtightly.
When joining this cover part 12, the frame edge 12
b. Interposition of a film-like adhesive that can be heat-welded between the flange parts of the cover part 12c or ultrasonic welding. High frequency welding can be applied, and if the welding point is set at a high enough position that it will not interfere with the soldering process when mounting the coil assembly 10 on the base plate 12a, the printed circuit board of the external terminals 11, 11... This is preferable because it is less susceptible to the effects of automatic soldering processing.
このように構成する表面実装型のコイル部品は
プリント基板Ｐの板面上に載置し、プリント基板
Ｐの導電パターンと外装ケース１２のベース板１
２ａから側方に突出された外部端子１１，１１…
…の外軸端１１ｂ，１１ｂ……を半田付けするこ
とにより自動実装することができる。その自動実
装時にはウエーブソルダリングやリフローソルダ
リングを適用し、他の部品と共に半田付け処理す
ることができる。この半田付けに伴つて、溶融半
田からの熱が外装ケース１２に作用しても、その
熱を耐熱性のプラスチツク材料で形成された外装
ケースで遮断できるから、外装ケース１２の空間
内に収容されたコイル組立体１０に波及するのを
防ぐことができる。また、これと同様に溶剤や湿
気等がコイル組立体１０に作用するのも防止でき
る。 The surface-mounted coil component configured in this way is placed on the board surface of the printed circuit board P, and is connected to the conductive pattern of the printed circuit board P and the base plate 1 of the exterior case 12.
External terminals 11, 11... projecting laterally from 2a.
It can be automatically mounted by soldering the outer shaft ends 11b, 11b, . . . . When automatically mounting it, wave soldering or reflow soldering can be applied, and it can be soldered together with other parts. Even if heat from the molten solder acts on the outer case 12 during this soldering, the heat can be blocked by the outer case made of a heat-resistant plastic material, so that the heat is not contained within the space of the outer case 12. This can prevent the damage from spreading to the coil assembly 10. Similarly, it is also possible to prevent solvents, moisture, etc. from acting on the coil assembly 10.
なお、上述した実施例はコア１０３としてEI，
EE型等を組み付けることにより閉磁路を形成す
るコイル部品を構成する場合に基づいて説明した
が、それ以外に開磁路のコイル部品を構成するに
も適用してもよい。また、コイル組立体１０とし
てはトロイダル型のものを組み付けて構成するこ
とができる。 Note that in the embodiment described above, the core 103 is EI,
Although the description has been made based on the case where a coil component forming a closed magnetic path is constructed by assembling EE type etc., the present invention may also be applied to constructing a coil component having an open magnetic circuit. Further, the coil assembly 10 can be constructed by assembling a toroidal type.
考案の効果
以上の如く、本考案に係る表面実装型のコイル
部品に依れば、コイル組立体を外装ケースの内部
に容易に組付け固定できて表面実装型に構成でき
るばかりでなく、閉磁路を有するコイル部品の磁
気的特性を損なわずに耐半田性を付与できること
により自動実装を適用でき、また、耐溶剤性と共
に耐湿性等も付与できることから、極めて信頼性
の高いコイル部品として構成することができる。Effects of the invention As described above, according to the surface mount type coil component according to the present invention, the coil assembly can be easily assembled and fixed inside the outer case, and can be configured as a surface mount type, as well as a closed magnetic circuit. It is possible to apply solder resistance without impairing the magnetic properties of the coil component, making it possible to apply automatic mounting, and it can also be configured as an extremely reliable coil component, as it can provide moisture resistance as well as solvent resistance. I can do it.
第１図は本考案に係る表面実装型コイル部品を
示す断面図、第２図は同コイル部品の外装ケース
を構成するベース板を示す斜視図、第３図は同コ
イル部品の外観を示す斜視図、第４図は一般例に
係る表面実装部品を示す説明図である。
１０……コイル組立体、１００……ボビン、１
００ａ……巻軸部、１００ｂ……端子台、１０
１，１０１……導出端子、１０２……コイル、１
０３……コア、１１，１１……外部端子、１１
ａ，１１ａ…………外部端子の内軸端、１１ｂ，
１１ｂ…………外部端子の外軸端、１２……外装
ケース、１２ａ……ベース板、１２ｂ……枠縁
部、１２ｃ……カバー部。
Fig. 1 is a cross-sectional view showing a surface-mounted coil component according to the present invention, Fig. 2 is a perspective view showing a base plate constituting the outer case of the coil part, and Fig. 3 is a perspective view showing the external appearance of the coil part. FIG. 4 is an explanatory diagram showing a surface mount component according to a general example. 10...Coil assembly, 100...Bobbin, 1
00a... Winding shaft portion, 100b... Terminal block, 10
1,101...Leading terminal, 102...Coil, 1
03... Core, 11, 11... External terminal, 11
a, 11a……Inner shaft end of external terminal, 11b,
11b...Outer shaft end of external terminal, 12...Exterior case, 12a...Base plate, 12b...Frame edge, 12c...Cover part.
Claims (1)
ルの端末をボビンの端子台に装着された導出端
子の軸線上に絡げ止め、更に、コアを該ボビン
に組み付けてなるコイル組立体を外装ケースの
内部に気密に封止する表面実装型のコイル部品
において、 耐熱性を有する絶縁性のプラスチツク材料で
形成されたベース板と、このベース板と同材質
のプラスチツク材料で形成されたキヤツプ状の
カバー部と、内軸端側を板面上に露出位置し且
つ外軸端側を板底面から側方に折曲位置させて
ベース板に埋込み装着された表面実装用の外部
端子とを有する外装ケースを備え、 上記コイル組立体の導出端子を外装ケースの
ベース板に埋込み装着された外部端子の内軸端
上に重合固定させて、当該コイル組立体をベー
ス板の板面上に取付け固定すると共に、このベ
ース板の板面上に固定装着されるカバー部の空
間内に収容位置させて外装ケースで気密に封止
したことを特徴とする表面実装型コイル部品。 (2) 上記カバー部は、ベース板と同材質のプラス
チツク材料から一体に立上げ成形された枠縁部
に固定装着されているところの実用新案登録請
求の範囲第１項記載の表面実装型コイル部品。[Claims for Utility Model Registration] (1) A coil is wound around the winding shaft of a bobbin, the end of the coil is tied onto the axis of a lead-out terminal attached to the terminal block of the bobbin, and the core is A surface-mounted coil component that hermetically seals a coil assembly assembled to the bobbin inside an outer case includes a base plate made of a heat-resistant and insulating plastic material, and a base plate made of a heat-resistant insulating plastic material. The cap-shaped cover part is made of a plastic material, and the inner shaft end side is exposed on the plate surface, and the outer shaft end side is bent sideways from the bottom surface of the plate, and is embedded in the base plate. an outer case having an external terminal for surface mounting; the lead-out terminal of the coil assembly is superimposed and fixed onto the inner shaft end of the external terminal embedded in the base plate of the outer case; is mounted and fixed on the plate surface of the base plate, and is housed in a space of a cover section fixedly attached on the plate surface of the base plate, and is hermetically sealed with an exterior case. type coil parts. (2) The surface-mounted coil according to claim 1, wherein the cover portion is fixedly attached to the edge of the frame that is integrally formed from the same plastic material as the base plate. parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987147101U JPH0543446Y2 (en) | 1987-09-25 | 1987-09-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987147101U JPH0543446Y2 (en) | 1987-09-25 | 1987-09-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6452211U JPS6452211U (en) | 1989-03-31 |
| JPH0543446Y2 true JPH0543446Y2 (en) | 1993-11-02 |
Family
ID=31417198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987147101U Expired - Lifetime JPH0543446Y2 (en) | 1987-09-25 | 1987-09-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0543446Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0723934Y2 (en) * | 1989-03-13 | 1995-05-31 | ティーディーケイ株式会社 | Inductance element |
| DE3910750C3 (en) * | 1989-04-03 | 2002-11-07 | Norbert Weiner | Connection device for an electronic component |
| JPH0748432B2 (en) * | 1990-02-14 | 1995-05-24 | 松下電器産業株式会社 | Trance |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5517459U (en) * | 1978-07-20 | 1980-02-04 | ||
| JPS5527214U (en) * | 1978-08-05 | 1980-02-21 | ||
| JPS5544342U (en) * | 1978-09-12 | 1980-03-22 |
-
1987
- 1987-09-25 JP JP1987147101U patent/JPH0543446Y2/ja not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5517459U (en) * | 1978-07-20 | 1980-02-04 | ||
| JPS5527214U (en) * | 1978-08-05 | 1980-02-21 | ||
| JPS5544342U (en) * | 1978-09-12 | 1980-03-22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6452211U (en) | 1989-03-31 |
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