JPS62208610A - Rotary transformer - Google Patents
Rotary transformerInfo
- Publication number
- JPS62208610A JPS62208610A JP61051150A JP5115086A JPS62208610A JP S62208610 A JPS62208610 A JP S62208610A JP 61051150 A JP61051150 A JP 61051150A JP 5115086 A JP5115086 A JP 5115086A JP S62208610 A JPS62208610 A JP S62208610A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic film
- winding groove
- magnetic
- thickness
- coil
- 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.)
- Pending
Links
- 238000004804 winding Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims description 26
- 239000003973 paint Substances 0.000 claims description 5
- 238000007747 plating Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 abstract 4
- 229910000859 α-Fe Inorganic materials 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910000889 permalloy Inorganic materials 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 229910000702 sendust Inorganic materials 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、回転磁気ヘッドを有する磁気記録再生装置に
用いられ回転ヘッド部と固定部との信号伝達を行う回転
トランスに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a rotary transformer used in a magnetic recording/reproducing device having a rotating magnetic head and transmitting signals between a rotating head section and a fixed section.
従来の技術 従来の技術について、図面を用いて説明する。Conventional technology A conventional technique will be explained using drawings.
第３図は従来の技術における平面形の回転トランスの断
面図である。回転側環状コア１３ａ （以下Ｒコア）と
、固定側環状コア１３ｂ（以下Ｓコア）は、高周波損失
の少ないフェライトを焼結して作られ、両面に研磨仕上
げ施されている。Ｒコア１３ａとＳコア１３ｂのそれぞ
れの対向面側には環状に巻線溝１７ａ、１７ｂが形成さ
れており、回転側巻線溝１７ａには１〜数ターン程度巻
かれた回転側コイル１５ａ （以下Ｒコイル）がはめ込
まれ、同様に固定側巻線溝１７ｂには固定側コイル１５
ｂ（以下Ｓコイル）がＲコイル１５ａのターン数に対し
所定の昇圧比に応じたターン数だけ巻かれはめ込まれて
いる。FIG. 3 is a sectional view of a conventional planar rotary transformer. The rotating side annular core 13a (hereinafter referred to as R core) and the stationary side annular core 13b (hereinafter referred to as S core) are made by sintering ferrite with low high frequency loss, and are polished on both sides. Annular winding grooves 17a and 17b are formed on opposing surfaces of the R core 13a and S core 13b, respectively, and a rotating coil 15a (15a) is wound around one to several turns in the rotating coil groove 17a. Similarly, the fixed side coil 15 is fitted into the fixed side winding groove 17b.
b (hereinafter referred to as S coil) is wound and fitted in a number of turns corresponding to a predetermined boost ratio with respect to the number of turns of R coil 15a.
さて、Ｒコア１３ａとＳコア１３ｂは数１０μｍの微少
隙間をもって対向しており、点線の様な磁路１９を形成
する。そしてＲコイル１５ａに電流が流れると相互誘導
作用によりＳコイル１５ｂに電流が誘起されて信号が伝
送される。Now, the R core 13a and the S core 13b face each other with a minute gap of several tens of micrometers, forming a magnetic path 19 as shown by a dotted line. When a current flows through the R coil 15a, a current is induced in the S coil 15b due to mutual induction, and a signal is transmitted.
Ｓコイル１５ｂからＲコイル１５ａに信号が伝送される
場合も同様である。（例えば、坂１）稔。The same applies when a signal is transmitted from the S coil 15b to the R coil 15a. (For example, Saka 1) Minoru.
田中 孝「回転トランス」、ナショナル・テクニカル・
レボ−）Ｖｏ １．１ Ｂ、阻４．１９７２゜Ｐ３５９
〜Ｐ３６９）
発明が解決しようとする問題点
回転トランスを利用している回転ヘッド式の磁気記録再
生装置は近年小型、軽量、低コスト化が進められており
、その為、あらゆる構成部品について小型、軽量、低コ
スト化の可能性が追求されている。Takashi Tanaka "Rotating transformer", National Technical
Rev-) Vo 1.1 B, Inhibition 4.1972゜P359
~P369) Problems to be solved by the invention In recent years, rotating head type magnetic recording and reproducing devices using rotary transformers have been made smaller, lighter, and lower in cost. The possibility of reducing weight and cost is being pursued.
従って回転トランスも、例外ではなく形状の小型、薄形
化が進められている。しかし、その製造方法がフェライ
トの焼結であり、肉厚でＩＨ程度とするのが限度であっ
た。更に焼結後の研磨仕上げにより、精度を出さなけれ
ばならず、コストアップの要因となっていた。Therefore, rotary transformers are no exception; their shapes are becoming smaller and thinner. However, the manufacturing method used was sintering of ferrite, and the wall thickness was limited to IH. Furthermore, precision must be achieved through polishing after sintering, which is a factor in increasing costs.
問題点を解決するための手段
本発明は上記問題点を解決する為、巻線溝を有する基材
と、その基材の少くとも巻線溝を有する側の表面を被う
様に形成した磁性膜と、巻線溝にはめ込んだコイルとよ
り成る回転トランスとしたものである。Means for Solving the Problems In order to solve the above problems, the present invention provides a base material having a winding groove, and a magnetic material formed to cover at least the surface of the base material on the side having the winding groove. It is a rotating transformer consisting of a membrane and a coil fitted into a winding groove.
作用
本発明は、軽量で精度の出し易い基材上に形成した磁性
膜により、回転トランスの磁路を形成せしめる為、高精
度で低コスト化を図る事が出来る。Function: In the present invention, the magnetic path of the rotary transformer is formed by a magnetic film formed on a lightweight and easily accurate base material, so that high precision and low cost can be achieved.
実施例
以下、本発明の一実施例を添付図面にもとづいて説明す
る。Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.
第１図は、本発明の一実施例における回転トランスの断
面図であって回転側基材１ａと固定側基材１ｂとの対向
面側は、それぞれ回転側磁性膜３ａの厚みｔ２、固定側
磁性１１３ｂの厚みｔ５を見込んで、回転側巻線溝７ａ
及び固定側製綿溝７ｂの所要寸法より太き目の寸法の環
状の溝が形成されている（以下、「回転側」を１Ｒ側」
。FIG. 1 is a sectional view of a rotary transformer according to an embodiment of the present invention, in which the opposing surfaces of a rotating side base material 1a and a stationary side base material 1b have a thickness t2 of a rotating side magnetic film 3a, and a thickness t2 of a rotating side magnetic film 3a, and a thickness t2 of a rotating side magnetic film 3a, and a thickness of the fixed side Considering the thickness t5 of the magnetic layer 113b, the rotation side winding groove 7a is
And an annular groove with dimensions thicker than the required dimensions of the fixed-side cotton-making groove 7b is formed (hereinafter, the "rotating side" is referred to as the 1R side).
.
「固定側」を「Ｓ側」と略記する。）基材の材質は、金
属、樹脂等を問わず、特に樹脂であれば、射出成形法が
使用出来て低コストかつ比重がフェライトより小さい為
、回転トランスの軽量化を図る事が出来る。又、基材は
、回転トランスを使用する装置の構成部品の一部を用い
ても良い。そして前記Ｒ側、Ｓ側基材の少くとも溝を形
成した側を被う様に、厚みがＲ側はｔＲ，、Ｓ側はｔＳ
となる様に、Ｒ側磁性膜３ａ、Ｓ側磁性膜３ｂを形成す
る。厚みｔＲ９ｔＳは、磁性膜の透磁率によるが、磁気
記録に用いるセンダストやパーマロイ。The "fixed side" is abbreviated as "S side." ) The material of the base material can be metal, resin, etc., but especially if it is resin, injection molding can be used, the cost is low, and the specific gravity is smaller than ferrite, so it is possible to reduce the weight of the rotary transformer. Further, the base material may be a part of a component of a device using a rotary transformer. Then, the thickness is tR on the R side and tS on the S side so as to cover at least the grooved side of the R side and S side base materials.
The R side magnetic film 3a and the S side magnetic film 3b are formed so that. The thickness tR9tS depends on the magnetic permeability of the magnetic film, such as Sendust or Permalloy used for magnetic recording.
フェライト塗料等であって、かつ数Ｍ）ｌｚ程度迄の信
号伝送であれば、１０μｍ〜数１０μｍ程度で充分であ
る。次いでＲ側巻線溝７ａには、所定のターン数に巻か
れたＲ側コイル５ａがはめ込まれ、Ｓ側巻線ｍ１ｂには
Ｒ側に対して所定の昇圧比となる様なターン数に巻かれ
たＳ側コイル５ｂがはめ込まれる。Ｒ側とＳ側は数１０
μｍ程度の微少隙間を設けて対向させている。For ferrite paint, etc., and for signal transmission up to several M)lz, a thickness of about 10 μm to several tens of μm is sufficient. Next, the R-side coil 5a wound with a predetermined number of turns is fitted into the R-side winding groove 7a, and the S-side winding m1b is wound with a number of turns such that a predetermined step-up ratio with respect to the R side is achieved. The S-side coil 5b that has been turned is fitted. R side and S side are number 10
They are opposed to each other with a minute gap of about μm.
さて、本実施例において、Ｒ側からＳ側に信号伝送する
場合を考える。Ｒ側コイル５ａに電流が流れると発生し
た磁束は磁性膜に沿って、点線の様な磁路９を通ってＳ
側コイル５ａに電流が誘起され、信号が伝送される。Now, in this embodiment, let us consider a case where a signal is transmitted from the R side to the S side. When a current flows through the R side coil 5a, the generated magnetic flux passes along the magnetic film and passes through the magnetic path 9 shown by the dotted line to the S
A current is induced in the side coil 5a, and a signal is transmitted.
本発明によれば、磁性膜の厚みが薄り、基材表面に沿い
易く、従って基材に精度の出し易い材料を選べば、微少
隙間を従来より小さく出来、伝送効率を上げる事が出来
、逆に言えば、従来と同一の伝送効率では、より小型化
する事が出来る。According to the present invention, by selecting a material that reduces the thickness of the magnetic film, easily follows the surface of the base material, and therefore facilitates precision for the base material, the minute gap can be made smaller than before, and the transmission efficiency can be increased. Conversely, with the same transmission efficiency as before, it is possible to make the device more compact.
また磁性膜の材料としては前述の如く誘磁率の高いセン
ダストやパーマロイなどでも厚さを薄く出来る為うず電
流損が少なくて済むので使う事が出来る。これは伝送効
率の向上をもたらす上記の様な材料を用いて磁性膜を基
材上に形成する方法としてメッキや磁性塗料の塗布など
の方法があげられるが、センダストやパーマロイなどの
基材上へのメッキにより磁性膜を形成する方法は小型。Furthermore, as the material for the magnetic film, sendust or permalloy having a high dielectric constant as described above can be used because the thickness can be made thin and eddy current loss can be reduced. This is a method of forming a magnetic film on a base material using the above-mentioned materials that improves transmission efficiency, such as plating or applying magnetic paint. The method of forming a magnetic film by plating is small.
軽量化に大きな効果が得られる。A great effect can be achieved in weight reduction.
フェライト等の磁性粉を塗料にした磁性塗料を基材に塗
布する方法は簡単、安価に出来、膜厚の調整範囲も広く
取れ、回転トランスの設計の自由度がより大きくなる。The method of applying a magnetic paint made of magnetic powder such as ferrite to a base material is simple and inexpensive, allows for a wide adjustment range of film thickness, and provides greater freedom in designing the rotary transformer.
第２図は本発明の他の実施例における回転ｌ・ランスの
断面図であり、磁性膜として、巻線溝を機械加工した磁
性板を用いた事を特徴としている。FIG. 2 is a sectional view of a rotary lance according to another embodiment of the present invention, which is characterized in that a magnetic plate with machined winding grooves is used as the magnetic film.
機械加工として、プレスや切削が考えられるが、本実施
ではプレスとした。磁性板の材料はパーマロイやセンダ
ストの薄板を用い、それに巻線溝をプレスにより形成し
たＲ側、Ｓ側それぞれの磁性板、すなわち回転側磁性板
１１ａを回転側基材１ａに、固定側磁性板１１ｂを固定
側基材１ｂに装着している。Pressing and cutting can be considered as machining, but in this implementation, pressing was used. The material of the magnetic plate is a thin plate of permalloy or sendust, and winding grooves are formed thereon by pressing.The magnetic plates are for the R side and the S side, that is, the rotating side magnetic plate 11a is used as the rotating side base material 1a, and the stationary side magnetic plate is used as the rotating side base material 1a. 11b is attached to the fixed base material 1b.
磁性膜をプレス加工により巻線溝を形成した磁性板とす
る事により、基材の洗浄等が不要となり、より一層の低
コスト化を図る事が出来る。By forming the magnetic film into a magnetic plate with winding grooves formed by press working, cleaning of the base material, etc. is not necessary, and further cost reduction can be achieved.
なお、以」二連べてきた実施例では回転側と固定側の双
方を本発明の構成としているが、一方を本発明の構成、
他方を従来の構成としても良い事は言うまでもない。In the following two embodiments, both the rotating side and the stationary side are configured according to the present invention, but one side is configured according to the present invention.
It goes without saying that the other may have a conventional configuration.
更に、以上述べてきた実施例においては、平面形の回転
トランスについて説明してきたが、円筒形の回転トラン
スの場合も同様に構成する事が出来る。Further, in the embodiments described above, a planar rotary transformer has been described, but a cylindrical rotary transformer can be similarly configured.
発明の効果
以上述べてきたように、巻線溝を有する基材上に少くと
も巻線溝を有する側の表面を被うように磁性膜を形成し
、巻線溝にコイルをはめ込んだ構成とする事により、小
型、薄形、軽量化と低コスト化が出来、更に磁性膜の材
料の選択が自由に出来、かつ磁性膜の形成法が、メッキ
磁性塗料の塗布、磁性板の機械加工が考えられ、回転ト
ランスの設計の自由度が増すと言う効果も得られる。Effects of the Invention As described above, a magnetic film is formed on a base material having a winding groove so as to cover at least the surface of the side having the winding groove, and a coil is fitted into the winding groove. By doing so, it is possible to reduce the size, thinness, weight, and cost. Furthermore, the material for the magnetic film can be freely selected, and the method for forming the magnetic film can be changed from applying plating magnetic paint to machining the magnetic plate. This also has the effect of increasing the degree of freedom in designing the rotary transformer.
第１図は本発明の一実施例の回転トランスの断面図、第
２図は本発明の他の実施例の回転トランスの断面図、第
３図は従来の回転トランスの断面図である。
１・・・・・・基材、３・・・・・・磁性膜、５・・・
・・・コイル、７・・・・・・巻線溝、１１・・・・・
・磁性板。FIG. 1 is a cross-sectional view of a rotary transformer according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a rotary transformer according to another embodiment of the present invention, and FIG. 3 is a cross-sectional view of a conventional rotary transformer. 1... Base material, 3... Magnetic film, 5...
... Coil, 7 ... Winding groove, 11 ...
・Magnetic plate.
Claims (4)
も前記巻線溝を有する側の表面を被う様に形成された磁
性膜と、前記巻線溝にはめ込まれたコイルとより成る回
転トランス。(1) A base material having an annular winding groove, a magnetic film formed to cover at least the surface of the base material on the side having the winding groove, and a coil fitted in the winding groove. A rotating transformer consisting of
ことを特徴とする特許請求の範囲第（１）項記載の回転
トランス。(2) The rotary transformer according to claim (1), wherein the magnetic film is a magnetic film formed by plating.
膜であることを特徴とする特許請求の範囲第（１）項記
載の回転トランス。(3) The rotary transformer according to claim (1), wherein the magnetic film is a magnetic film formed by applying magnetic paint.
徴とする特許請求の範囲第（１）項記載の回転トランス
。(4) The rotary transformer according to claim (1), wherein the magnetic film is a machined magnetic plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61051150A JPS62208610A (en) | 1986-03-07 | 1986-03-07 | Rotary transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61051150A JPS62208610A (en) | 1986-03-07 | 1986-03-07 | Rotary transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62208610A true JPS62208610A (en) | 1987-09-12 |
Family
ID=12878785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61051150A Pending JPS62208610A (en) | 1986-03-07 | 1986-03-07 | Rotary transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62208610A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02248010A (en) * | 1989-03-20 | 1990-10-03 | Sharp Corp | Rotary transformer |
| US6101084A (en) * | 1997-02-12 | 2000-08-08 | Rakov; Mikhail A. | Capacitive rotary coupling |
| WO2004088682A1 (en) * | 2003-03-31 | 2004-10-14 | Council Of Scientific And Industrial Research | A device useful for signal transfer from static surface to rotating surface and viceversa |
-
1986
- 1986-03-07 JP JP61051150A patent/JPS62208610A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02248010A (en) * | 1989-03-20 | 1990-10-03 | Sharp Corp | Rotary transformer |
| US6101084A (en) * | 1997-02-12 | 2000-08-08 | Rakov; Mikhail A. | Capacitive rotary coupling |
| WO2004088682A1 (en) * | 2003-03-31 | 2004-10-14 | Council Of Scientific And Industrial Research | A device useful for signal transfer from static surface to rotating surface and viceversa |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5237476A (en) | Thin film tape head assembly | |
| JPH0326444B2 (en) | ||
| JPS62208610A (en) | Rotary transformer | |
| US3984874A (en) | High density magnetic recording and reproducing system | |
| US3564521A (en) | Miniature magnetic head | |
| JPS62291011A (en) | Rotary transformer | |
| JPS59149013A (en) | Manufacture of rotary transformer | |
| US5764453A (en) | Method of manufacturing a thin-film magnetic head, and magnetic head manufactured by means of said method | |
| US5587859A (en) | Recording and/or reproducing apparatus having rotary transformer | |
| JPS60216516A (en) | Forming method of winding for rotary transformer | |
| JPH04344310A (en) | Thin film magnetic circuit substrate and magnetic head using the same | |
| US20020039263A1 (en) | Magnetic head , and method of manufacturing same | |
| JPS623412A (en) | Lapping device | |
| JPH0110904Y2 (en) | ||
| JP3011846B2 (en) | Magnetic head | |
| JPH0370104A (en) | Rotary transformer and manufacture thereof | |
| JPS633409A (en) | Rotary transformer | |
| JP3002254B2 (en) | VTR magnetic head | |
| JPS6372104A (en) | Rotary transformer | |
| JPH09213549A (en) | Cylindrical rotary transformer | |
| JPH03211805A (en) | Rotary transformer | |
| JPS59121621A (en) | Rotary magnetic head device | |
| JPH01116901A (en) | Rotary magnetic head device | |
| JPH04143908A (en) | Production of lamination type magnetic head | |
| JPS62250610A (en) | Rotary transformer |