JPH0453664B2 - - Google Patents
Info
- Publication number
- JPH0453664B2 JPH0453664B2 JP60288316A JP28831685A JPH0453664B2 JP H0453664 B2 JPH0453664 B2 JP H0453664B2 JP 60288316 A JP60288316 A JP 60288316A JP 28831685 A JP28831685 A JP 28831685A JP H0453664 B2 JPH0453664 B2 JP H0453664B2
- Authority
- JP
- Japan
- Prior art keywords
- tape
- magnetic head
- vtr
- cylinder
- magnetic
- 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
- 238000000034 method Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
Landscapes
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Description
【発明の詳細な説明】
(イ) 産業上の利用分野
本考案はビデオ用の磁気ヘツドの製造方法に関
するものであり、より特定的には磁気ヘツドのテ
ープ当接面を好適に研摩して磁気ヘツドを製造す
る方法に関する。[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a method for manufacturing a magnetic head for video, and more specifically, the present invention relates to a method for manufacturing a magnetic head for a video. The present invention relates to a method of manufacturing a head.
(ロ) 従来の技術
斯種の研摩方法は一般に回転体に磁気ヘツドを
取り付けると共にラツピングテープを走行させて
磁気ヘツドの先端を研摩するという方法が採られ
る。このような方法は例えば特開昭55−101130号
や特開昭56−61025号にも示されている。今、第
４図を参照して簡単に説明すると、磁気ヘツド１
は０を中心とする回転体２の端部にヘツドベース
３と一体の状態で取り付けられ回転体２によつて
所定速度て回転する。一方、ラツピングテープ４
は供給リール（図示せず）から第１ガイドピン５
を通してガイドシリンダ６に巻き付き、ここで磁
気ヘツド１に当接して磁気ヘツドを研摩し、次の
第２ガイドピン７を通して巻取りリール（図示せ
ず）へ供給する。前記ガイドシリンダ６の径は研
摩された磁気ヘツドを実装するシリンダと同径に
作られたものである。そしてラツピングテープ４
は粒度が＃10000〜＃15000程度でテープ厚が15μ
ｍ〜20μｍのものが用いられる。このような条件
でラツピングした磁気ヘツドは実際のVTRに取
り付けた場合と同等のテープ当たりを有する磁気
ヘツドの厚み方向の曲率をもつたテープ摺動面を
形成することができる。(b) Prior Art This type of polishing method generally involves attaching a magnetic head to a rotating body and running a wrapping tape to polish the tip of the magnetic head. Such a method is also disclosed in, for example, Japanese Patent Application Laid-open Nos. 55-101130 and 56-61025. Now, to briefly explain with reference to FIG. 4, the magnetic head 1
is attached integrally with the head base 3 to the end of the rotating body 2 centered at 0, and is rotated by the rotating body 2 at a predetermined speed. On the other hand, wrapping tape 4
is the first guide pin 5 from the supply reel (not shown).
It is wound around the guide cylinder 6 through the guide pin 6, where it comes into contact with the magnetic head 1 to polish the magnetic head, and is then fed through the next second guide pin 7 to a take-up reel (not shown). The diameter of the guide cylinder 6 is made to be the same as that of the cylinder in which the polished magnetic head is mounted. And wrapping tape 4
The particle size is about #10000 to #15000 and the tape thickness is 15μ.
A material with a diameter of m to 20 μm is used. The magnetic head wrapped under these conditions can form a tape sliding surface with a curvature in the thickness direction of the magnetic head that has the same tape contact as when attached to an actual VTR.
(ハ) 発明が解決しようとする問題点
ところが実際は、このようにテープラツプされ
た磁気ヘツドは回転体２から取外してVTRのシ
リンダに取り付けられるが、その取り付け状態が
テープラツピング時と完全に同等でない限り良好
なテープ当りは望めない。即ち、上記の従来方法
ではVTRのシリンダ径と同等のシリンダ径で、
且つ磁気テープと同等の厚みであるラツピングテ
ープを用いるため磁気ヘツドのテープ摺動面の幅
方向のテープラツプされた部分の長さはVTRに
実装された時に磁気テープがテープ摺動面に接触
する長さと全く等しいので、VTRのシリンダに
取り付けられたときのバラツキをカバーすること
ができない。(C) Problems to be Solved by the Invention However, in reality, the tape-wrapped magnetic head is removed from the rotating body 2 and attached to the cylinder of the VTR, but the attached state is not completely the same as when tape-wrapped. Good tape contact cannot be expected. In other words, in the conventional method described above, the cylinder diameter is the same as that of a VTR,
In addition, since wrapping tape is used that has the same thickness as the magnetic tape, the length of the tape-wrapped portion in the width direction of the tape sliding surface of the magnetic head is such that the magnetic tape comes into contact with the tape sliding surface when mounted on a VTR. Since the length is exactly the same, it cannot cover the variation when attached to the VTR cylinder.
(ニ) 問題点を解決するための手段
そこで、本発明ではラツピングテープを巻き付
けるガイドシリンダの径が前記VTRのテープ案
内用ドラムシリンダの径よりも小さいシリンダを
用いると共に、回転磁気ヘツドの先端部の前記シ
リンダに対する突出量を前記VTRで実装する場
合の突出量と同等にし、且つ前記VTRで使用さ
れる磁気テープの厚みと同等の厚みを有するラツ
ピングテープを用いて前記磁気ヘツドのテープ当
接面をラツピングする。(d) Means for Solving the Problems Therefore, in the present invention, a guide cylinder around which the wrapping tape is wound is used whose diameter is smaller than the diameter of the tape guiding drum cylinder of the VTR, and the tip of the rotating magnetic head is Tape abutment of the magnetic head using a wrapping tape that has a protrusion amount from the cylinder equal to the protrusion amount when mounted on the VTR and has a thickness equivalent to the thickness of the magnetic tape used in the VTR. Wrap the surface.
(ホ) 作用
このような方法では、ラツピングテープが磁気
ヘツドの幅方向の隅部に近いところまで十分に当
接して研摩する。従つて、研摩後の磁気ヘツドを
VTRに実装したとき、その回転方向の取り付け
に多少のバラツキ誤差があつても、これを吸収す
るものである。(e) Effect: In this method, the wrapping tape sufficiently contacts and polishes the magnetic head close to the corners in the width direction. Therefore, the magnetic head after polishing should be
When mounted on a VTR, even if there is some variation in the installation in the rotational direction, this will be absorbed.
(ヘ) 実施例
第１図において、８はVTRの実際のシリンダ
であり、６′はラツピング装置におけるガイドシ
リンダを示す。このガイドシリンダ６′は例えば
第４図に示すように半管状の筒体であつてもよ
く、完全な円筒体であつてもよい。ただし、半管
状の筒体の形に形成した場合には回転体２に対す
る磁気ヘツド１の取り付けや取り外しが簡易にな
るという利点がある。第１図から分るように本発
明では実際のVTRのシリンダ径Ｒよりも、ラツ
ピング装置のガイドシリンダの径R′を小さくし
ている。尚、そのR′はＲの約80％程度が適当で
ある。このようなガイドシリンダ６′に対し磁気
ヘツド１の突出量は実際のシリンダ８に取り付け
た場合の突出量と同程度になるように設定する。
この突出量は50μｍである。この状態で第４図の
如くラツピングテープ４を走行させて研摩する
と、その研摩を受ける範囲は第２図および第３図
のl2となり、研摩部分が広くなる。これはラツピ
ングテープ４が第１図に示すように磁気ヘツドの
幅方向の隅部１ａに近いところまで十分に当接し
て磁気ヘツドを研摩するからである。尚、前記ラ
ツピングテープ４は例えば粒度が＃10000で、テ
ープ厚が20μｍである。このテープ厚はVTRで使
用する磁気テープ９と同等である。第２図におい
て、l1は磁気ヘツド１がVTRのテープ案内用ド
ラムシリンダ８に実装されたときに磁気テープ９
が接する範囲を示すが、この範囲は研摩された範
囲によも小さい。上述した条件で研摩し、VTR
に実装した場合について比較すれば
m1＝490μｍ〜550μｍ、m2＝600μｍ〜760μｍで
ある。(F) Embodiment In FIG. 1, 8 is an actual cylinder of a VTR, and 6' is a guide cylinder in a wrapping device. This guide cylinder 6' may be, for example, a semi-tubular cylinder as shown in FIG. 4, or may be a complete cylinder. However, when the magnetic head 1 is formed in the shape of a semi-tubular cylinder, there is an advantage that the magnetic head 1 can be easily attached to and removed from the rotary body 2. As can be seen from FIG. 1, in the present invention, the diameter R' of the guide cylinder of the wrapping device is made smaller than the cylinder diameter R of the actual VTR. Note that R' is suitably about 80% of R. The amount of protrusion of the magnetic head 1 from such a guide cylinder 6' is set to be approximately the same as the amount of protrusion when attached to the actual cylinder 8.
This protrusion amount is 50 μm. In this state, when the wrapping tape 4 is run and polished as shown in FIG. 4, the area to be polished becomes l2 in FIGS. 2 and 3, and the polished area becomes wider. This is because the wrapping tape 4 comes into sufficient contact close to the widthwise corner 1a of the magnetic head, as shown in FIG. 1, and polishes the magnetic head. The wrapping tape 4 has, for example, a particle size of #10000 and a tape thickness of 20 μm. This tape thickness is equivalent to the magnetic tape 9 used in VTRs. In FIG. 2, l 1 indicates the magnetic tape 9 when the magnetic head 1 is mounted on the tape guiding drum cylinder 8 of the VTR.
shows the area in contact, but this area is smaller than the polished area. Polished under the above conditions and VTR
Comparing the case where it is mounted, m 1 =490 μm to 550 μm, and m 2 = 600 μm to 760 μm.
(ト) 発明の効果
本発明によればVTRに磁気ヘツドが実装され
た場合に磁気テープが接する部分の範囲（ギヤツ
プＧから両側に例えば490μｍ〜550μｍ）に対し、
予め研摩された範囲（ギヤツプＧから両側に例え
ば600μｍ〜700μｍ）が広いので、VTRのシリン
ダへの取り付けのバラツキを十分にカバーするこ
とができるという効果がある。(G) Effects of the Invention According to the present invention, when a magnetic head is mounted on a VTR, the area where the magnetic tape contacts (for example, 490 μm to 550 μm on both sides from the gap G),
Since the pre-polished area is wide (for example, 600 μm to 700 μm on both sides from the gap G), it has the effect of being able to sufficiently cover variations in mounting the VTR to the cylinder.
第１図、第２図、および第３図は本発明の説明
図である。第４図は従来の一般的に行なわれてい
る磁気ヘツドの研摩工程を示す図である。
４……ラツピングテープ、６……ガイドシリン
ダ、８……テープ案内用ドラムシリンダ、９……
磁気テープ。
FIG. 1, FIG. 2, and FIG. 3 are explanatory diagrams of the present invention. FIG. 4 is a diagram showing a conventional polishing process of a magnetic head that is generally performed. 4... Wrapping tape, 6... Guide cylinder, 8... Tape guiding drum cylinder, 9...
Magnetic tape.
Claims (1)
気ヘツドのテープ当接面を研摩する工程を含む磁
気ヘツドの製造方法であつて、ラツピングテープ
を巻き付けるガイドシリンダの径が前記VTRの
テープ案内用ドラムシリンダの径よりも小さいシ
リンダを用いると共に、回転磁気ヘツドの先端部
の前記シリンダに対する突出量を前記VTRで実
装する場合の突出量と同等にし、且つ前記VTR
で使用される磁気テープの厚みと同等の厚みを有
するラツピングテープを用いて前記磁気ヘツドの
テープ当接面を該磁気ヘツドの幅方向の隅部に近
いところまでラツピングすることを特徴とする磁
気ヘツドの製造方法。1. A method for manufacturing a magnetic head for use in a helical scan type VTR, which includes the step of polishing the tape contacting surface of a magnetic head, wherein the diameter of the guide cylinder around which the wrapping tape is wound is the same as that of the tape guiding drum cylinder of the VTR. A cylinder having a diameter smaller than that of the VTR is used, and the amount of protrusion of the tip of the rotating magnetic head with respect to the cylinder is made equal to the amount of protrusion when mounted in the VTR, and
The tape contacting surface of the magnetic head is wrapped to a point close to the widthwise corner of the magnetic head using a wrapping tape having a thickness equivalent to that of the magnetic tape used in the magnetic tape. Head manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28831685A JPS62148152A (en) | 1985-12-20 | 1985-12-20 | Method for manufacturing magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28831685A JPS62148152A (en) | 1985-12-20 | 1985-12-20 | Method for manufacturing magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62148152A JPS62148152A (en) | 1987-07-02 |
| JPH0453664B2 true JPH0453664B2 (en) | 1992-08-27 |
Family
ID=17728598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28831685A Granted JPS62148152A (en) | 1985-12-20 | 1985-12-20 | Method for manufacturing magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62148152A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59172111A (en) * | 1983-03-18 | 1984-09-28 | Sanyo Electric Co Ltd | Chucking mechanism of rotary disk |
-
1985
- 1985-12-20 JP JP28831685A patent/JPS62148152A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59172111A (en) * | 1983-03-18 | 1984-09-28 | Sanyo Electric Co Ltd | Chucking mechanism of rotary disk |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62148152A (en) | 1987-07-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |