JPH0142813Y2 - - Google Patents
Info
- Publication number
- JPH0142813Y2 JPH0142813Y2 JP1302280U JP1302280U JPH0142813Y2 JP H0142813 Y2 JPH0142813 Y2 JP H0142813Y2 JP 1302280 U JP1302280 U JP 1302280U JP 1302280 U JP1302280 U JP 1302280U JP H0142813 Y2 JPH0142813 Y2 JP H0142813Y2
- Authority
- JP
- Japan
- Prior art keywords
- head
- front core
- core
- sliding surface
- tape
- 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
Links
- 239000003822 epoxy resin Substances 0.000 claims description 9
- 229920000647 polyepoxide Polymers 0.000 claims description 9
- 229910052573 porcelain Inorganic materials 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 229910000859 α-Fe Inorganic materials 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Magnetic Heads (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案は、V.T.Rあるいはテープレコ−ダ等
に使用される磁気記録・再生装置の磁気ヘツドに
関するものである。[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to a magnetic head of a magnetic recording/reproducing device used in a VTR, tape recorder, or the like.
（従来の技術）
従来、磁気記録・再生装置の消去ヘツド１は、
第１図ないし第２図に示す如く、ヘツド部２を本
体３の嵌合部３ａに挿入して接着固定した後、バ
ツクモ−ルドを施し、かつテープ摺接面３ｂを所
定の円孤状に研摩加工してなるものが一般的であ
る。すなわち、上記の例えば消去ヘツド１のヘツ
ド部２は、コイル２ａにフロントコア２ｂ及びバ
ツクコア２ｃを接着固定すると共に、テープ摺接
面３ｂの上部に位置するフロントコア２ｂの反ヘ
ツド本体挿入側の周縁部に設けたガラス２ｄを介
し、ノンマグフエライト２ｅなどで成形されたブ
ロツクを固着して一体的に構成したものであり、
このヘツド部２を本体３の嵌合部３ａにテープ摺
接面３ｂ方向より挿入して接着剤を用いて固着し
た後、テープ摺接面３ｂを円孤状に研摩加工して
消去ヘツド１を製造していたものである。(Prior Art) Conventionally, the erasing head 1 of a magnetic recording/reproducing device is
As shown in Figures 1 and 2, after the head part 2 is inserted into the fitting part 3a of the main body 3 and fixed with adhesive, back molding is applied and the tape sliding surface 3b is shaped into a predetermined circular arc shape. It is generally made by polishing. That is, for example, the head portion 2 of the erasing head 1 described above has a front core 2b and a back core 2c fixed to the coil 2a by adhesive, and the peripheral edge of the front core 2b located above the tape sliding surface 3b on the side opposite to the head main body insertion side. It is constructed integrally by fixing blocks formed of non-magnetic ferrite 2e etc. through glass 2d provided in the part.
This head part 2 is inserted into the fitting part 3a of the main body 3 from the direction of the tape sliding surface 3b and fixed using an adhesive, and then the tape sliding surface 3b is polished into a circular arc shape to form the erasing head 1. It was manufactured.
（考案が解決しようとする課題）
かかる従来の磁気ヘツドでは、テープ摺接面３
ｂの上部に位置するフロントコア２ｂの反ヘツド
本体挿入側の周縁部にガラス２ｄを取り付けるた
め、フロントコア２ｂとノンマグフエライト２ｅ
間にガラス２ｄを接着させる工程が必要になる。
従つて、この磁気ヘツドでは、作業工程が複雑に
なるだけでなく、接着固定作業による位置ずれ等
によつて製品のバラツキが生じ、コストパーフオ
マンスが低くなつていた。(Problem to be solved by the invention) In such a conventional magnetic head, the tape sliding surface 3
In order to attach the glass 2d to the peripheral edge of the front core 2b on the side opposite to the head main body insertion side located at the upper part of the front core 2b, the front core 2b and the non-mag ferrite 2e are
A step of adhering the glass 2d between them is required.
Therefore, with this magnetic head, not only the work process becomes complicated, but also the product becomes inconsistent due to positional deviations caused by the adhesive fixing work, resulting in low cost performance.
また、一体化したヘツド部２を挿入する本体３
の嵌合部３ａを加工するとき、研削液が内部に残
留しており、ヘツド部２を挿入したときフロント
コア２ｂに固着したブロツクに研削液が浸みこん
で絶縁不良をひき起し易いなどの欠点があつた。
また、ヘツド部２を本体３の嵌合部３ａに挿入し
て固着しても、嵌合部３ａ内の隙間にバツクモー
ルドを施す必要があり、作業工数が多かつた。 Also, a main body 3 into which the integrated head portion 2 is inserted
When machining the fitting part 3a of the front core 2b, the grinding fluid may remain inside, and when the head part 2 is inserted, the grinding fluid may seep into the block fixed to the front core 2b and cause insulation defects. There were flaws.
Further, even if the head portion 2 is inserted into the fitting portion 3a of the main body 3 and fixed, it is necessary to perform back molding in the gap within the fitting portion 3a, which requires a large number of man-hours.
さらに、消去ヘツド１のヘツド部２を形成して
いるブロツクがポリアセタール等の熱可塑性樹脂
の場合は、熱衝撃性や耐摩耗性に乏しく、テープ
走行中に摩耗して、安定したテープの走行が維持
できなくなる等の欠点があり、消去ヘツド１の寿
命も短かいものであつた。 Furthermore, if the block forming the head portion 2 of the erasing head 1 is made of thermoplastic resin such as polyacetal, it has poor thermal shock resistance and abrasion resistance, and will wear out during tape running, making it difficult to run the tape stably. There were drawbacks such as an inability to maintain the erase head 1, and the life of the erase head 1 was also short.
また、上記ブロツクにノンマグフエライト２ｅ
を使用した場合は、加工性が容易でなく、砥石研
磨の切れ味も悪く、ブロツク成形後の研磨加工で
クラツクが生じることもあつた。さらに近年、原
材料の値上り等により安定して材料を供給するこ
とができないなど、生産能力の問題点もあり、高
価にならざるを得なかつた。 In addition, non-mag ferrite 2e is added to the above block.
When using a block, the workability was not easy, the sharpness of grinding with a whetstone was poor, and cracks sometimes occurred during the polishing process after block molding. Furthermore, in recent years, there have been problems with production capacity, such as the inability to stably supply materials due to rising raw material prices, etc., and they have had to become expensive.
この考案は上述した事情に鑑みてなされたもの
であり、部品点数の削減、製造工程の簡略化を計
ると共に、フエライト系材料の代替材料により加
工性を向上し、製品バラツキの少ない安価な消去
ヘツド等の製品を量産可能にすることを目的とし
た磁気ヘツドを提供するものである。 This idea was made in view of the above-mentioned circumstances, and aims to reduce the number of parts and simplify the manufacturing process, as well as improve workability by using an alternative material to ferrite materials, and create an inexpensive erasing head with less product variation. The present invention provides a magnetic head for the purpose of mass-producing products such as the following.
（課題を解決するための手段）
上記課題を解決するための手段として本考案
は、音響装置の記録再生をするヘツド部がコイ
ル、フロントコア及びバツクコアから成る磁気ヘ
ツドにおいて、前記ヘツド部のフロントコアを挿
入する嵌合部を設けたヘツド本体と、このヘツド
本体に前記ヘツド部のフロントコアを案内するた
めに設けた案内溝と、この案内溝に前記フロント
コアを挿入する前記ヘツド本体のテープ摺接面窓
部に充填する樹脂は耐摩耗性磁器粉末とエポキシ
樹脂とを混合した複合材料より構成されることを
特徴とするものである。(Means for Solving the Problems) As a means for solving the above problems, the present invention provides a magnetic head in which a recording/reproducing head section of an audio device is composed of a coil, a front core, and a back core. a head body provided with a fitting portion into which the head is inserted; a guide groove provided in the head body to guide the front core of the head; and a tape slider of the head body into which the front core is inserted. The resin filled in the contact window is made of a composite material made of a mixture of wear-resistant porcelain powder and epoxy resin.
（作用）
コイル、フロントコアおよびバツクコアから成
るヘツド部のフロントコアをヘツド本体の嵌合部
の案内溝に挿入することにより、ヘツド部のフロ
ントコアがテープ摺接面に対して正確に位置決め
されるので、位置ズレによるバラツキが生じない
ようになり、信頼性の高い磁気ヘツドが提供され
る。(Function) By inserting the front core of the head section, which consists of a coil, front core, and back core, into the guide groove of the fitting section of the head body, the front core of the head section is accurately positioned with respect to the tape sliding surface. Therefore, variations due to positional deviations do not occur, and a highly reliable magnetic head is provided.
また、案内溝にフロントコアを挿入するヘツド
本体のテープ摺接面窓部に充填する樹脂は、耐摩
耗性磁器粉末とエポキシ樹脂とを混合した複合材
料からなるので、走行テープを時経的に走行使用
してもヘツド本体が摩耗により損傷し、磁気ヘツ
ドの品質を劣化させないようにすると共に、走行
テープそのものが熱衝撃により損傷を受けないよ
うにすることにより、信頼性の高い磁気ヘツドが
提供される。 In addition, the resin filled in the window on the tape sliding surface of the head body where the front core is inserted into the guide groove is made of a composite material that is a mixture of wear-resistant porcelain powder and epoxy resin. A highly reliable magnetic head is provided by preventing the head body from being damaged by wear and deterioration of the quality of the magnetic head during running, and by preventing the running tape itself from being damaged by thermal shock. be done.
（実施例）
以下、この考案による実施例を第３図ないし第
４図に示した消去ヘツドの例に基づいて具体的に
説明する。図において従来例と対応する個所及び
部品は同一符号を付して説明する。(Embodiment) Hereinafter, an embodiment of this invention will be explained in detail based on the example of the erasing head shown in FIGS. 3 and 4. In the drawings, parts and parts corresponding to those of the conventional example will be described with the same reference numerals.
消去ヘツド１を構成するヘツド部２は、コイル
２ａにフロントコア２ｂ及びバツクコア２ｃを接
着固定したものである。また、ヘツド部２を挿入
する消去ヘツド１の本体３は、ヘツド部３ｃ、ヘ
ツド部２が嵌合される嵌合部３ａから主に構成さ
れる。そして、このヘツド部２は堀体３の嵌合部
３ａに挿入され、テープ摺接面３ｂには耐摩耗性
磁器粉末とエポキシ樹脂とを混合した複合材料か
らなる樹脂４を充填した後、表面を所定の円孤状
に研磨してテープ摺接面３ｂを形成するものであ
る。 The head section 2 constituting the erasing head 1 has a front core 2b and a back core 2c fixed to a coil 2a by adhesive. The main body 3 of the erasing head 1 into which the head section 2 is inserted is mainly composed of a head section 3c and a fitting section 3a into which the head section 2 is fitted. This head part 2 is inserted into the fitting part 3a of the moat body 3, and the tape sliding contact surface 3b is filled with resin 4 made of a composite material made of a mixture of wear-resistant porcelain powder and epoxy resin. is polished into a predetermined arc shape to form the tape sliding surface 3b.
従つて上記ヘツド部２は従来例と異なり、フロ
ントコア２ｂを挾着しているガラス２ｄ及びフエ
ライト２ｅが不要となり、部品点数及び作業工
程、殊に接着工程が大巾に削減された簡単な構造
になる。ここで上記消去ヘツド１のテープ摺接面
３ｂに充填される樹脂４は、主にガラスの原材料
であるSiO2を主成分とするケイ砂、木節粘土と
称する粘土を混合した耐摩耗性磁器粉末及びエポ
キシ樹脂の結合材から構成される。そして、適宜
添加物を適量混合してもよい。 Therefore, unlike the conventional example, the head section 2 has a simple structure in which the glass 2d and ferrite 2e that clamp the front core 2b are not required, and the number of parts and work processes, especially the bonding process, are greatly reduced. become. Here, the resin 4 filled into the tape sliding surface 3b of the erasing head 1 is made of wear-resistant porcelain mixed with silica sand whose main component is SiO 2 , which is a raw material for glass, and clay called Kibushi clay. Consists of a powder and epoxy resin binder. Then, appropriate amounts of additives may be mixed as appropriate.
樹脂に混合する添加物の総量は、エポキシ樹脂
の場合に混合固化したときの強度が大きい方が望
ましいが、各エポキシ樹脂に混合する限度量、以
下になるようにする。 In the case of epoxy resins, it is desirable that the total amount of additives mixed with the resin has a high strength when mixed and solidified, but the total amount of additives mixed into each epoxy resin should be below the limit amount.
また、上記耐摩耗性磁器粉末のケイ砂の組成と
しては、例えば、ケイ砂が鋳型用ケイ砂として知
られている第２種から第５種までのどれでもよ
く、SiO2が80％以上べ、FeO3が３％以下のもの
である。 The composition of the silica sand of the wear-resistant porcelain powder may be, for example, any type 2 to type 5 silica sand known as silica sand for molding, and it may contain 80% or more of SiO 2 . , FeO 3 is 3% or less.
また、土質粘土としては、例えば、SiO2が43.7
％〜50.3％，Al2O3が33％〜37％，Fe2O3が0.19〜
1.34，TiO2が0.09〜1.9％のものがある。 In addition, as soil clay, for example, SiO 2 is 43.7
%~50.3% , Al2O3 33%~37%, Fe2O3 0.19 ~
1.34, some contain 0.09 to 1.9% TiO2 .
なお上記添加物にはマグネシウム、カルシウ
ム、亜鉛、マンガン、コバルト、リン、ニツケル
等が好適である。 In addition, magnesium, calcium, zinc, manganese, cobalt, phosphorus, nickel, etc. are suitable for the above-mentioned additives.
なお、上記構成において、ヘツド部２を挿入す
る本体３の嵌合部３ａには、ヘツド部２のフロン
トコア２ｂがテープ摺接面３ｂに対して正確に位
置決めされるよう案内溝３ｃが形成されており、
しかもこの嵌合部３ａの案内溝３ｃの入口部は面
取り３ｄが施されている。 In the above structure, a guide groove 3c is formed in the fitting part 3a of the main body 3 into which the head part 2 is inserted so that the front core 2b of the head part 2 is accurately positioned with respect to the tape sliding surface 3b. and
Furthermore, the entrance portion of the guide groove 3c of this fitting portion 3a is chamfered 3d.
（考案の効果）
上記のように本考案によれば、ヘツド部のフロ
ントコアがテープ摺接面に対して正確に位置決め
されるので、位置決め精度を高めることにより、
信頼性の高い磁気ヘツドが提供できる。(Effects of the invention) As described above, according to the invention, the front core of the head part is accurately positioned with respect to the tape sliding surface, so by increasing the positioning accuracy,
A highly reliable magnetic head can be provided.
また、ヘツド本体のテープ摺接面窓部に充填す
る樹脂は耐摩耗性磁器粉末とエポキシ樹脂とを混
合材料からなるので、走行テープを時経的に走行
使用してもヘツド本体が摩耗により損傷し磁気ヘ
ツドの品質を劣化させないようにすることができ
る。 In addition, the resin filled in the window on the tape sliding surface of the head body is made of a mixture of wear-resistant porcelain powder and epoxy resin, so even if the running tape is used over time, the head body may be damaged by wear. However, it is possible to prevent the quality of the magnetic head from deteriorating.
さらに、本考案では、ヘツド部を含むテープ摺
接面の熱衝撃性、耐摩耗性を一段と向上させるこ
とができると共に、走行テ−を損傷しないように
することができるので、消去ヘツドだけでなく、
安価で量産可能な磁気記録・再生装置の磁気ヘツ
ドを提供することができる。 Furthermore, with the present invention, it is possible to further improve the thermal shock resistance and abrasion resistance of the tape sliding surface including the head part, and it is possible to prevent damage to the running tape, so it is not only effective for erasing heads. ,
It is possible to provide a magnetic head for a magnetic recording/reproducing device that can be mass-produced at low cost.
第１図は従来の消去ヘツドの実施例を示す組立
前の縦断面図、第２図は従来の消去ヘツドを示す
正面斜視図、第３図はこの考案による一実施例を
示す消去ヘツドの組立前の縦断面図、第４図はこ
の考案による消去ヘツドの正面斜視図である。
１……消去ヘツド、２……ヘツド部、２ａ……
コイル、２ｂ……フロントコア、２ｃ……バツク
コア、３……ヘツド本体、３ａ……嵌合部、３ｂ
……テープ摺接面、３ｃ……案内溝、４……磁器
エポキシ樹脂部。
FIG. 1 is a vertical cross-sectional view of an embodiment of a conventional erasing head before assembly, FIG. 2 is a front perspective view of a conventional erasing head, and FIG. 3 is an assembly of an erasing head showing an embodiment of this invention. The previous longitudinal sectional view, FIG. 4, is a front perspective view of the erasing head according to this invention. 1... Erasing head, 2... Head portion, 2a...
Coil, 2b...front core, 2c...back core, 3...head body, 3a...fitting part, 3b
... Tape sliding contact surface, 3c ... Guide groove, 4 ... Porcelain epoxy resin part.
Claims (1)
フロントコア及びバツクコアから成る磁気ヘツド
において、前記ヘツド部のフロントコアを挿入す
る嵌合部を設けたヘツド本体と、このヘツド本体
に前記ヘツド部のフロントコアを案内するために
設けた案内溝と、この案内溝に前記フロントコア
を挿入する前記ヘツド本体のテープ摺接面窓部に
充填する樹脂が耐摩耗性磁器粉末とエポキシ樹脂
とを混合した複合材料から構成されることを特徴
とする磁気ヘツド。 The head part of the audio device that records and plays is a coil,
A magnetic head comprising a front core and a back core, a head body provided with a fitting portion into which the front core of the head portion is inserted, a guide groove provided in the head body for guiding the front core of the head portion; A magnetic head characterized in that the resin filled in the window portion of the tape sliding surface of the head main body into which the front core is inserted into the guide groove is made of a composite material made of a mixture of wear-resistant porcelain powder and epoxy resin. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1302280U JPH0142813Y2 (en) | 1980-02-05 | 1980-02-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1302280U JPH0142813Y2 (en) | 1980-02-05 | 1980-02-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56115725U JPS56115725U (en) | 1981-09-04 |
| JPH0142813Y2 true JPH0142813Y2 (en) | 1989-12-13 |
Family
ID=29609569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1302280U Expired JPH0142813Y2 (en) | 1980-02-05 | 1980-02-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0142813Y2 (en) |
-
1980
- 1980-02-05 JP JP1302280U patent/JPH0142813Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56115725U (en) | 1981-09-04 |
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