JPH0664683B2 - Rotating magnetic head recorder - Google Patents
Rotating magnetic head recorderInfo
- Publication number
- JPH0664683B2 JPH0664683B2 JP2801286A JP2801286A JPH0664683B2 JP H0664683 B2 JPH0664683 B2 JP H0664683B2 JP 2801286 A JP2801286 A JP 2801286A JP 2801286 A JP2801286 A JP 2801286A JP H0664683 B2 JPH0664683 B2 JP H0664683B2
- Authority
- JP
- Japan
- Prior art keywords
- outer core
- motor
- rotary transformer
- rotary
- motor rotor
- 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 - Fee Related
Links
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、回転ヘッドを使用して磁気記録再生を行なう
回転磁気ヘッド記録装置に関するもので、特に映像、音
響機器などに使用して有効なものである。Description: TECHNICAL FIELD The present invention relates to a rotary magnetic head recording device that performs magnetic recording and reproduction using a rotary head, and is particularly effective when used for video and audio equipment. It is a thing.
（従来の技術） 近年、回転磁気ヘッド記録装置の性能向上が重要視され
ている。(Prior Art) In recent years, performance improvement of a rotary magnetic head recording device has been emphasized.
以下、図面を参照しながら、従来の回転磁気ヘッド記録
装置の一例について説明する。An example of a conventional rotary magnetic head recording device will be described below with reference to the drawings.
第２図は、従来の回転磁気ヘッド記録装置の構成断面図
を示すもので、第２図において、1aは端面を複数極に着
磁されたマグネットで、強磁性体で作られたマグネット
ケース1bと接着固定され、モータロータ１を構成する。
2aは、マグネット1aの着磁面に対向して形成された複数
個のコイルで、強磁性体で作られたステータ板2b上に接
着固定され、モータステータ２を構成する。モータステ
ータ２は下シリンダ４の内側端面に固定される。モータ
ロータ１とモータステータ２とでモータを構成する。３
は、筒型周対向型のロータリトランス対で、内周面に複
数のコイル溝を切つて、おのおのにコイルを埋め込んだ
外側コア3aと、外周面に複数のコイル溝を切って、おの
おのにコイルを埋め込んだ内側コア3bより構成される。
内側コア3bは、下シリンダ４の内側端面に固定される。
外側コア3aはその外周面をモータロータ１と固定され
る。モータロータ１は、下シリンダ４に組み込んだ軸受
５に支持されたシャフト６とディスク７を介して固定さ
れ、自由回転する。８は上シリンダで、端面の外周に近
い部分に磁気ヘッド９を固定し、ディスクに固定され、
シヤフト６や外側コア3aと共に回転する。FIG. 2 is a sectional view showing the structure of a conventional rotary magnetic head recording apparatus. In FIG. 2, 1a is a magnet whose end faces are magnetized to have a plurality of poles, and a magnet case 1b made of a ferromagnetic material. Are bonded and fixed to form the motor rotor 1.
Reference numeral 2a denotes a plurality of coils formed so as to face the magnetized surface of the magnet 1a. The coils 2a are bonded and fixed on a stator plate 2b made of a ferromagnetic material to form the motor stator 2. The motor stator 2 is fixed to the inner end surface of the lower cylinder 4. The motor rotor 1 and the motor stator 2 constitute a motor. Three
Is a pair of cylindrical peripherally opposed rotary transformers, each having an outer core 3a with a coil embedded in each of the inner peripheral surfaces and a plurality of coil grooves embedded in the inner peripheral surface, and a plurality of coil grooves in the outer peripheral surface each having a coil It is composed of an inner core 3b in which is embedded.
The inner core 3b is fixed to the inner end surface of the lower cylinder 4.
The outer peripheral surface of the outer core 3a is fixed to the motor rotor 1. The motor rotor 1 is fixed via a shaft 6 supported by a bearing 5 incorporated in the lower cylinder 4 and a disk 7, and is freely rotated. An upper cylinder 8 has a magnetic head 9 fixed to a portion near the outer periphery of the end face and fixed to the disk.
It rotates together with the shaft 6 and the outer core 3a.
以上のように構成された従来の回転磁気ヘッド記録装置
について、以下その動作について説明する。The operation of the conventional rotary magnetic head recording device configured as described above will be described below.
まず、モータにより、モータロータ１、ロータリトラン
ス対３の外側コア3aが回転する。上シリンダ８上に設置
された磁気ヘッド９が磁気テープ（図略）上の磁気情報
を検出し、ロータリトランス対３の外側コア3aに信号を
送る。この信号はロータリトランス対３で電磁変換さ
れ、外側コア3a、内側コア3b間で磁気伝達され、内側コ
ア3bで再度電磁変換されて、電気信号としてロータリト
ランス対３の内側コア3bより出力される。First, the motor rotates the motor rotor 1 and the outer core 3a of the rotary transformer pair 3. A magnetic head 9 installed on the upper cylinder 8 detects magnetic information on a magnetic tape (not shown) and sends a signal to the outer core 3a of the rotary transformer pair 3. This signal is electromagnetically converted in the rotary transformer pair 3, magnetically transmitted between the outer core 3a and the inner core 3b, electromagnetically converted again in the inner core 3b, and output from the inner core 3b of the rotary transformer pair 3 as an electric signal. .
（発明が解決しようとする問題点） しかしながら上記のような構成では、回転する外側コア
3aの下端面が、ステータ板2bより上部にあり、又その上
端面もロータと近接しているため、モータで発生する交
番磁界の漏洩磁束10が、ロータリトランス対３の外側コ
ア3aと内側コア3bの間に漏れ込む。ロータリトランス対
３のコイル溝のピッチは、チャンネル間漏洩の制約があ
り、小さくすることが出来ない。そのため、外側コア3a
の最上部と最下部コイル溝3c,3dと端面までの長さは大
きくとれず、最上部と最下部のコイル溝3c,3dでの磁気
伝達にモータの漏れ磁束が入り、雑音が増え、Ｓ／Ｎが
悪くなるという欠点を有していた。(Problems to be Solved by the Invention) However, in the above configuration, the rotating outer core
Since the lower end surface of 3a is above the stator plate 2b and the upper end surface thereof is also close to the rotor, the leakage magnetic flux 10 of the alternating magnetic field generated by the motor is generated by the outer core 3a and the inner core of the rotary transformer pair 3. Leak between 3b. The pitch of the coil grooves of the rotary transformer pair 3 cannot be reduced because there is a restriction of leakage between channels. Therefore, the outer core 3a
The length between the uppermost and lowermost coil grooves 3c and 3d and the end surface cannot be set large, and the magnetic flux leaks into the magnetic transmission between the uppermost and lowermost coil grooves 3c and 3d, increasing noise and It has a defect that / N becomes worse.
本発明は上記問題点に鑑み、モータからロータリトラン
ス対３に漏れ込む漏洩磁束10を少なくし、ロータリトラ
ンス対３での磁気伝達の外部雑音を減らし、Ｓ／Ｎを向
上するようにした回転磁気ヘッド記録装置を提供するも
のである。In view of the above problems, the present invention reduces the leakage magnetic flux 10 leaking from the motor to the rotary transformer pair 3, reduces external noise of magnetic transmission in the rotary transformer pair 3, and improves the S / N ratio. A head recording device is provided.
（問題点を解決するための手段） 上記問題点を解決するために本発明の回転磁気ヘッド記
録装置は、最上部と最下部のコイル溝とそれぞれの端面
までの長さを、ロータリトランス対のコイル溝ピッチに
対し、十分長く設定し、かつモータステータのステータ
板をロータリトランス外側コアの下端面より上部に設定
し、モータロータのマグネットケースを外側コアの上端
面より下部に設定するという構成を備えたものである。(Means for Solving the Problems) In order to solve the above problems, the rotary magnetic head recording apparatus of the present invention is configured such that the uppermost and lowermost coil grooves and the lengths to the respective end surfaces are set to the rotary transformer pair. The coil groove pitch is set sufficiently long, the stator plate of the motor stator is set above the lower end surface of the rotary transformer outer core, and the magnet case of the motor rotor is set below the upper end surface of the outer core. It is a thing.
（作用） 本発明は上記した構成によって、ロータリトランス対の
外側コアが、モータとロータリトランス対の磁気伝達部
の間のシールド材となり、モータで発生される交番磁界
が、ロータリトランス対に入らず、雑音を減らし、Ｓ／
Ｎが向上できる。(Operation) According to the present invention, the outer core of the rotary transformer pair serves as a shield material between the motor and the magnetic transmission portion of the rotary transformer pair, and the alternating magnetic field generated by the motor does not enter the rotary transformer pair. , Reduce noise, S /
N can be improved.
（実施例） 以下、本発明の実施例の回転磁気ヘッド記録装置につい
て、図面を参照しながら説明する。第１図は本発明の実
施例の回転磁気ヘッド記録装置の構成断面図を示すもの
でである。第１図において、３はロータリトランス対
で、外側コア3aと内側コア3bにより構成されている。外
側コア3aはその最上部と最下部コイル溝3c,3dと、上下
両端面までの長さが、コイル溝ピッチに比して十分長く
設定されている。１はモータロータで、複数極着磁され
たマグネット1aと、強磁性体製のマグネットケース1bよ
り構成され、マグネットケース1bが外側コア3aの上部端
面より下部の位置に設定され、固定されている。２はモ
ータステータで、複数個のコイル2aと強磁性体のステー
タ板2bより構成され、ステータ板2bを、外側コア3aの下
部端面より上部の位置になるよう、下シリンダ４内側端
面に構成される。その他の構成は、従来例と同様の構成
である。(Embodiment) A rotary magnetic head recording apparatus according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the configuration of a rotary magnetic head recording apparatus according to an embodiment of the present invention. In FIG. 1, 3 is a rotary transformer pair, which is composed of an outer core 3a and an inner core 3b. The outer core 3a has its uppermost and lowermost coil grooves 3c and 3d and the lengths to the upper and lower end surfaces set sufficiently longer than the coil groove pitch. A motor rotor 1 is composed of a magnet 1a magnetized with a plurality of poles and a magnet case 1b made of a ferromagnetic material. The magnet case 1b is set and fixed at a position lower than the upper end surface of the outer core 3a. A motor stator 2 is composed of a plurality of coils 2a and a ferromagnetic stator plate 2b. The stator plate 2b is formed on the inner end surface of the lower cylinder 4 so as to be located above the lower end surface of the outer core 3a. It Other configurations are similar to those of the conventional example.
以上のように構成された回転磁気ヘッド記録装置につい
て、以下、第１図を用いてその動作を説明する。The operation of the rotary magnetic head recording device configured as described above will be described below with reference to FIG.
第１図において、モータを構成しているモータロータ１
とモータステータ２の間の磁束は一部、漏洩磁束10のよ
うにロータリトランス対３の外側コア3aを流れる。しか
し、この漏洩磁束10は、ロータリトランス対３の外側と
内側コア3a,3b間の磁気伝達に影響を与えないため、雑
音は少なく、Ｓ／Ｎも悪くならない。又、モータを構成
しているモータロータ１や、モータステータ２と外側コ
ア3aの上下両端面と高さ的に離れており、かつ、外側コ
ア3aの両端面と最上部と最下部のコイル溝3c,,3dまでの
長さが、コイル溝ピッチに比して、大きいため、外側と
内側コア3a,3b間のギャップにモータからの直接入り込
む漏洩磁束による雑音は少ない。In FIG. 1, a motor rotor 1 constituting a motor
A part of the magnetic flux between the motor stator 2 and the motor stator 2 flows like the leakage magnetic flux 10 through the outer core 3a of the rotary transformer pair 3. However, since the leakage magnetic flux 10 does not affect the magnetic transfer between the outer side and the inner side cores 3a and 3b of the rotary transformer pair 3, noise is small and the S / N is not deteriorated. Further, the motor rotor 1 constituting the motor and the motor stator 2 are vertically separated from the upper and lower end surfaces of the outer core 3a, and both end surfaces of the outer core 3a and the uppermost and lowermost coil grooves 3c. , 3d is longer than the coil groove pitch, so that there is little noise due to the leakage magnetic flux directly entering the gap between the outer and inner cores 3a, 3b from the motor.
以上のように、ロータリトランス対３の外側コア3aの最
上部と最下部のコイル溝3c,3dと、それぞれの上下両端
面までの長さを、コイル溝ピッチに対し、十分長く設定
し、かつ、モータステータ２のステータ板2bを外側コア
下端面より上部に設定し、モータロータ１のマグネット
ケース1bを外側コア3aの上端面より下部に設定すること
により、外側コア3aが、モータとロータリトランス対３
間のシールドを行ない、モータの交番磁界によるロータ
リトランス対３への雑音が減少できる。As described above, the uppermost and lowermost coil grooves 3c and 3d of the outer core 3a of the rotary transformer pair 3 and their respective lengths to the upper and lower end surfaces are set sufficiently long with respect to the coil groove pitch, and By setting the stator plate 2b of the motor stator 2 above the lower end surface of the outer core, and setting the magnet case 1b of the motor rotor 1 below the upper end surface of the outer core 3a, the outer core 3a can be connected to the motor and the rotary transformer pair. Three
By shielding between them, noise to the rotary transformer pair 3 due to the alternating magnetic field of the motor can be reduced.
（発明の効果） 以上のように本発明によれば、モータの交番磁界による
雑音が少なく、Ｓ／Ｎが良いといったすぐれた効果を得
ることが出来る。(Effects of the Invention) As described above, according to the present invention, it is possible to obtain excellent effects that there is little noise due to the alternating magnetic field of the motor and that the S / N is good.
【図面の簡単な説明】 第１図は本発明の実施例の構成断面図、第２図は従来の
回転磁気ヘッド記録装置の構成断面図である。 １……モータロータ、1a……マグネット、1b……マグネ
ットケース、２……モータステータ、2a……コイル、2b
……ステータ板、３……ロータリトランス対、3a……外
側コア、3b……内側コア、3c……最上部コイル溝、3d…
…最下部コイル溝、４……下シリンダ、10……漏洩磁
束。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of the structure of an embodiment of the present invention, and FIG. 2 is a sectional view of the structure of a conventional rotary magnetic head recording apparatus. 1 ... Motor rotor, 1a ... Magnet, 1b ... Magnet case, 2 ... Motor stator, 2a ... Coil, 2b
...... Stator plate, 3 ... Rotary transformer pair, 3a ... Outer core, 3b ... Inner core, 3c ... Top coil groove, 3d ...
… Bottom coil groove, 4 …… Lower cylinder, 10 …… Leakage magnetic flux.
Claims (1)
トを包み込む形で成形されたマグネットケースによって
構成されたモータロータと、 前記モータロータと対向する複数個のコイルと、コイル
を支持固定する強磁性体のステータ板によって構成され
たモータステータと、 前記モータステータを保持する下シリンダと、 前記モータロータと前記下シリンダに、ロータ側とステ
ータ側が各々保持される筒型周対向のロータリトランス
対より成り、 前記ロータリトランス対の外側コアをロータ側として、
前記モータロータに保持され、 前記ロータリトランス外側コアの最上部と最下部のコイ
ル溝と、それぞれの端面までの長さを、 前記ロータリトランス対のコイル溝ピッチに対し、 十分長く設定し、 かつ、前記モータステータのステータ板を前記ロータリ
トランス外側コアの下端面より上部に設定し、前記モー
タロータのマグネットケースを前記ロータリトランス外
側コアの上端部より下部に設定したこと を特徴とする回転磁気ヘッド記録装置。1. A motor rotor composed of a magnet magnetized into a plurality of poles and a magnet case formed so as to enclose the magnet, a plurality of coils facing the motor rotor, and a ferromagnetic body for supporting and fixing the coils. And a lower cylinder that holds the motor stator, and a pair of rotary transformers that are cylindrically opposed to each other and that have a rotor side and a stator side respectively held by the motor rotor and the lower cylinder. With the outer core of the rotary transformer pair on the rotor side,
The uppermost and lowermost coil grooves of the outer core of the rotary transformer, which are held by the motor rotor, and the lengths to the respective end surfaces are set sufficiently long with respect to the coil groove pitch of the rotary transformer pair, and A rotary magnetic head recording apparatus, wherein a stator plate of a motor stator is set above a lower end surface of the rotary transformer outer core, and a magnet case of the motor rotor is set below an upper end portion of the rotary transformer outer core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2801286A JPH0664683B2 (en) | 1986-02-13 | 1986-02-13 | Rotating magnetic head recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2801286A JPH0664683B2 (en) | 1986-02-13 | 1986-02-13 | Rotating magnetic head recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62188001A JPS62188001A (en) | 1987-08-17 |
| JPH0664683B2 true JPH0664683B2 (en) | 1994-08-22 |
Family
ID=12236863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2801286A Expired - Fee Related JPH0664683B2 (en) | 1986-02-13 | 1986-02-13 | Rotating magnetic head recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0664683B2 (en) |
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-
1986
- 1986-02-13 JP JP2801286A patent/JPH0664683B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62188001A (en) | 1987-08-17 |
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| JPH0646225Y2 (en) | Brushless motor | |
| JPH0320887Y2 (en) | ||
| KR0183593B1 (en) | One chip type double head structure of the head drum assembly | |
| JPS5934485U (en) | magnetic motor | |
| JPH0342661Y2 (en) | ||
| JPS6044470U (en) | rotating electric machine | |
| JPH0320888Y2 (en) | ||
| JPH0734636B2 (en) | Motor | |
| JPS5914320U (en) | Core for rotary transformer | |
| JPS6132776U (en) | Small rotating magnetic field type motor | |
| JPS5942628A (en) | Tape guide drum device | |
| JPS62141675A (en) | Spindle motor | |
| JPS5978887U (en) | External rotor type electric motor | |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |