JPH0421244B2 - - Google Patents
Info
- Publication number
- JPH0421244B2 JPH0421244B2 JP58218619A JP21861983A JPH0421244B2 JP H0421244 B2 JPH0421244 B2 JP H0421244B2 JP 58218619 A JP58218619 A JP 58218619A JP 21861983 A JP21861983 A JP 21861983A JP H0421244 B2 JPH0421244 B2 JP H0421244B2
- Authority
- JP
- Japan
- Prior art keywords
- sliding surface
- molding material
- head
- case body
- 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 - Lifetime
Links
- 239000012778 molding material Substances 0.000 claims description 11
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 7
- 239000004917 carbon fiber Substances 0.000 claims description 7
- 239000002216 antistatic agent Substances 0.000 claims description 6
- 239000011256 inorganic filler Substances 0.000 claims description 6
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000000470 constituent Substances 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- -1 polybutylene terephthalate Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 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
- 238000005452 bending Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/10—Structure or manufacture of housings or shields for heads
Description
【発明の詳細な説明】
＜産業上の利用分野＞
本発明は、Ｖ・Ｔ・Ｒ等の音声信号用消去ヘツ
ドにおいて、消去ヘツドを構成するケース本体と
テープ摺接面とを一体成形してなる成形材料に帯
電防止剤である炭素繊維を添加してなる磁気ヘツ
ドに関するものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention is an erasing head for audio signals such as V/T/R, in which the case body and tape sliding surface constituting the erasing head are integrally molded. This invention relates to a magnetic head made by adding carbon fiber, which is an antistatic agent, to a molding material.
＜従来技術＞
従来、磁気ヘツドは第１図に示すように、コイ
ル、フロントコア、バツクコアからなるヘツド部
１を組込むケース本体２に、裏面側から挿入され
るよう嵌合部２ａが形成され、ヘツド部１のフロ
ントコア１ａの先端がケース本体２のテープ摺接
面２ｂに正確に位置決めされるように、ケース本
体２のテープ摺接面２ｂ側にセラミツク或いは無
機質フイラー入り成形材料からなるフロントブロ
ツク３が一体的に埋設されており、ヘツド部１を
組込んで内部モールドを施した後、テープ摺接面
２ｂを所定の円弧状に研磨加工して、第２図に示
すような磁気ヘツドが製造されていた。<Prior Art> Conventionally, as shown in FIG. 1, in a magnetic head, a fitting part 2a is formed in a case body 2 into which a head part 1 consisting of a coil, a front core, and a back core is incorporated, so as to be inserted from the back side. In order to ensure that the tip of the front core 1a of the head portion 1 is accurately positioned on the tape sliding surface 2b of the case body 2, a front block made of ceramic or a molding material containing an inorganic filler is provided on the tape sliding surface 2b side of the case body 2. 3 is integrally buried, and after incorporating the head part 1 and applying an internal mold, the tape sliding surface 2b is polished into a predetermined arc shape to form a magnetic head as shown in Fig. 2. It was manufactured.
しかしながら、上記フロントブロツク３の成形
材料には、帯電防止対策として帯電防止剤等が添
加されていないので、かなり絶縁性が高いもので
あり、磁気テープと、テープ摺接面との摩擦によ
り、静電気が発生して、テープ走行を劣化させ、
雑音の原因になつていた。特に、上記フロントブ
ロツク３の成形材料は、絶縁性が高いほど帯電量
が大きく、しかも面積抵抗値〔Ω／cm2〕も大きく
なるものであり、一定値以上の帯電量に到達する
と放電して雑音を増大させる等の欠点があつた。 However, since the molding material of the front block 3 does not contain any antistatic agent or the like as an antistatic measure, it has fairly high insulating properties, and static electricity is generated due to friction between the magnetic tape and the tape sliding surface. occurs, deteriorating tape running,
It was causing noise. In particular, the higher the insulating properties of the molding material for the front block 3, the greater the amount of charge, and the greater the sheet resistance value [Ω/cm 2 ], and when the amount of charge reaches a certain value or more, it will discharge. There were drawbacks such as increased noise.
＜問題点を解決するための手段＞
本発明は上述した従来の欠点を解決するために
なされたものであり、磁気ヘツドのテープ摺接面
における静電気の帯電防止対策として消去ヘツド
を構成するケース本体と、テープ摺接面とを一体
成形してなる成形材料に、静電気を防止する帯電
防止剤としてプラスチツクおよび無機質フイラー
100に対し炭素繊維８〜15重量比を添加すると共
に上記成形材料の面積抵抗を1010〔Ω／cm2〕以下
とした磁気ヘツドを提供するものである。<Means for Solving the Problems> The present invention has been made to solve the above-mentioned conventional drawbacks, and is a case body constituting an erasing head as a measure to prevent static electricity on the tape sliding surface of the magnetic head. Plastic and inorganic filler are added to the molding material made by integrally molding the tape and the tape sliding surface as an antistatic agent to prevent static electricity.
The object of the present invention is to provide a magnetic head in which carbon fiber is added in a weight ratio of 8 to 15 to 100, and the sheet resistance of the molding material is set to 10 10 [Ω/cm 2 ] or less.
＜発明の実施例＞
以下、本発明による実施例を第３図に基づいて
詳細に説明する。図において、１０はテープ摺接
面と一体に成形されたケース本体、１１はヘツド
部のフロントコア、１２はギヤツプ、１３はモー
ルド樹脂、１４は端子である。<Embodiments of the Invention> Hereinafter, embodiments of the present invention will be described in detail based on FIG. 3. In the figure, 10 is a case body molded integrally with the tape sliding surface, 11 is a front core of a head portion, 12 is a gap, 13 is a molded resin, and 14 is a terminal.
上記テープ摺接面と一体に成形されるケース本
体１０の基本構成材料は、プラスチツクス（例え
ばナイロン、ポリフエニレンサルフアイド、ポリ
ブチレンテレフタレート等）、無機質フイラー
（例えばアルミナ、炭酸カルシウム、石英ガラス
等）の他に炭素繊維の帯電防止剤が適量添加して
おりテープ走行時の摩擦による静電気が防止され
ている。 The basic constituent materials of the case body 10, which is molded integrally with the tape sliding surface, are plastics (for example, nylon, polyphenylene sulfide, polybutylene terephthalate, etc.), inorganic fillers (for example, alumina, calcium carbonate, quartz glass, etc.). ), an appropriate amount of carbon fiber antistatic agent is added to prevent static electricity caused by friction when the tape runs.
ここで、上記基本構成材料は、プラスチツク
ス、無機質フイラー、炭素繊維の重量比が、一実
施例として35：65：８として、しかも面積抵抗値
1010〔Ω／cm2〕以下としたものである。 Here, the above basic constituent materials have a weight ratio of plastic, inorganic filler, and carbon fiber of 35:65:8 as an example, and a sheet resistance value of 35:65:8.
10 10 [Ω/cm 2 ] or less.
また、炭素繊維は、従来のガラス繊維と同等、
又はそれ以上の材料の抗折強度及び引張り強度を
有し、なお、かつ導電性である特性があるので、
ガラス繊維に代わつて使用される添加物である。 In addition, carbon fiber is equivalent to conventional glass fiber,
It has the bending strength and tensile strength of the material or more, and has the property of being electrically conductive.
It is an additive used in place of glass fiber.
尚、本発明による磁気ヘツドのケース本体と、
ヘツド部のテープ摺接面とを一体成形する基本構
成材料の他に、カーボンブラツクの一種で、通常
のカーボンブラツクより極めて導電性の良いケツ
チエンブラツクを添加することも可能であり、耐
摩耗性を充分に保証することができる。 Furthermore, the case body of the magnetic head according to the present invention,
In addition to the basic constituent material that is integrally molded with the tape sliding surface of the head part, it is also possible to add ketchen black, which is a type of carbon black and has much better conductivity than normal carbon black, resulting in wear resistance. can be fully guaranteed.
また、本発明による基本構成材料の面積抵抗値
は、各種の実験結果に基づいて1010〔Ω／cm2〕以
下とするのが望ましい。 Further, the sheet resistance value of the basic constituent material according to the present invention is desirably 10 10 [Ω/cm 2 ] or less based on various experimental results.
＜作用効果＞
以上詳細に説明したように、本発明による磁気
ヘツドでは、消去ヘツドを構成するケース本体と
ヘツド部のテープ摺接面とを一体成形する成形材
料を、プラスチツクス、無機質フイラーの他に炭
素繊維の帯電防止剤を添加すると共に、上記成形
材料の面積抵抗値を1010〔Ω／cm2〕以下にしたも
のであり、テープ摺接面の帯電量が少なく、テー
プ走行を極めて円滑にするので雑音の発生を防止
することができるので、消去ヘツドとしての性能
を向上させることができる等の効果を奏する。<Operations and Effects> As described in detail above, in the magnetic head according to the present invention, the molding material for integrally molding the case body constituting the erasing head and the tape sliding surface of the head portion may be plastic, inorganic filler, or other material. In addition to adding a carbon fiber antistatic agent to the molding material, the sheet resistance value of the above molding material is set to 10 10 [Ω/cm 2 ] or less, so the amount of charge on the tape sliding surface is small, and the tape runs extremely smoothly. Since the generation of noise can be prevented, the performance as an erasing head can be improved.
第１図ないし第２図は、従来の実施例を示す磁
気ヘツドの分解構成図、及び組立て完成後の斜視
図、第３図は本発明による磁気ヘツドの斜視図で
ある。
１０……ケース本体、１１……ヘツド部、１２
……ギヤツプ、１３……モールド樹脂。
1 and 2 are exploded structural views of a magnetic head showing a conventional embodiment and a perspective view after assembly is completed, and FIG. 3 is a perspective view of a magnetic head according to the present invention. 10...Case body, 11...Head part, 12
...Gap, 13...Mold resin.
Claims (1)
上記消去ヘツドを構成するケース本体と、テープ
摺接面とを一体成形してなる成形材料に、静電気
を防止する帯電防止剤としてプラスチツクおよび
無機質フイラー100に対し炭素繊維８〜15重量比
を添加すると共に上記成形材料の面積抵抗を1010
〔Ω／cm2〕以下としたことを特徴とする磁気ヘツ
ド。[Claims] 1. In an erasing head with a molded product as a sliding surface,
To the molding material formed by integrally molding the case body constituting the erase head and the tape sliding surface, a weight ratio of 8 to 15 carbon fibers to 100 parts of plastic and inorganic filler is added as an antistatic agent to prevent static electricity. The area resistance of the above molding material is 10 10
A magnetic head characterized by having an ohm/cm 2 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21861983A JPS60111305A (en) | 1983-11-22 | 1983-11-22 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21861983A JPS60111305A (en) | 1983-11-22 | 1983-11-22 | Magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60111305A JPS60111305A (en) | 1985-06-17 |
| JPH0421244B2 true JPH0421244B2 (en) | 1992-04-09 |
Family
ID=16722788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21861983A Granted JPS60111305A (en) | 1983-11-22 | 1983-11-22 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60111305A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0770021B2 (en) * | 1987-07-30 | 1995-07-31 | 日機装株式会社 | Magnetic head |
| AT392549B (en) * | 1989-06-14 | 1991-04-25 | Philips Nv | MAGNETIC TAPE WITH A MAGNETIC HEAD |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5451515U (en) * | 1977-09-16 | 1979-04-10 |
-
1983
- 1983-11-22 JP JP21861983A patent/JPS60111305A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60111305A (en) | 1985-06-17 |
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