JPH03141012A - Tracking/driving device - Google Patents
Tracking/driving deviceInfo
- Publication number
- JPH03141012A JPH03141012A JP28140689A JP28140689A JPH03141012A JP H03141012 A JPH03141012 A JP H03141012A JP 28140689 A JP28140689 A JP 28140689A JP 28140689 A JP28140689 A JP 28140689A JP H03141012 A JPH03141012 A JP H03141012A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic head
- extension part
- photodetector
- light source
- head
- 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.)
- Granted
Links
- 239000011324 bead Substances 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野］
この発明はＶ ’Ｉ’ ｒ？などのテープに高密度で記
録両生するためのトラッキング駆動装置に関するもので
ある。。さらに詳しく述べると、磁気ヘッドと記録され
たトラックのずれを検出し、このずれ量に応じて正確に
情報を再生するために磁気ヘッドを駆動する装置２２に
関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to V 'I' r? This invention relates to a tracking drive device for high-density recording and recording on tapes such as tapes. . More specifically, the present invention relates to a device 22 that detects a deviation between a magnetic head and a recorded track and drives the magnetic head in order to accurately reproduce information according to the amount of deviation.
【従来の技術］
第５図は例えば特開昭６３−１７３２１９号公報に示さ
れた従来のトラッキング駆動装置の断面図である。図に
おいて、（１）は磁気ヘッド、 （２）は円筒形コイル
である制御用コイル、（３）はコイルボビン、 （４ａ
） 、 （４ｂ）は円形板バネであるジンバルばねであ
る。ジンバルばね（４ａ）は第６図に示すような形状で
、内周部をコイルボビン（３）の取付部（４ｃ）とし、
取付部（４ｃ）より一方向に延長部（４ｄ）を設け、先
端には磁気ヘッド（１）が接着固定されている。ジンバ
ルばね（４ｂ）の内周部もコイルボビン（３）の取付部
（４ｃ）とし、コイルボビン（３）と−体に可動なよう
同定されている。 （５）、（６）は厚み方向に着磁さ
れた円柱状の永久磁石、 ＋７）、（８１゜（９）、（
＋（＋１はヨークである。[Prior Art] FIG. 5 is a sectional view of a conventional tracking drive device disclosed in, for example, Japanese Unexamined Patent Publication No. 63-173219. In the figure, (1) is a magnetic head, (2) is a control coil which is a cylindrical coil, (3) is a coil bobbin, (4a
) and (4b) are gimbal springs that are circular leaf springs. The gimbal spring (4a) has a shape as shown in Fig. 6, with the inner circumference serving as the attachment part (4c) for the coil bobbin (3).
An extension part (4d) is provided in one direction from the attachment part (4c), and the magnetic head (1) is adhesively fixed to the tip. The inner peripheral portion of the gimbal spring (4b) also serves as a mounting portion (4c) for the coil bobbin (3), and is identified so as to be movable relative to the coil bobbin (3). (5), (6) are cylindrical permanent magnets magnetized in the thickness direction, +7), (81° (9), (
+(+1 is the yoke.
次に動作について説明する。Next, the operation will be explained.
不図示の公知の方法で磁気ヘッド＋１１ とテープ１−
に記録されたトラック間のずれを検出する。このトラッ
クずれの情報をもとに適当な電流なυ制御用コイル（２
）に印加する。制御用コイル（２）は永久磁石（５１，
（６）およびヨーク（７） 、 １８） 、 （９）
、 １１０） ！：より構成される磁気回路中に配；ｎ
されているので、電磁力により図の矢印Ａ ／Ｊ向に駆
動され、コイルボビン（３）と一体に１１■動であるジ
ンバルばね（４ａ）、ひいては磁気ヘット（１）も同方
向に駆動されトラックずれは解消される。The magnetic head +11 and the tape 1- are connected by a known method (not shown).
Detect discrepancies between tracks recorded on the track. Based on this track deviation information, an appropriate current υ control coil (2
). The control coil (2) is a permanent magnet (51,
(6) and yokes (7), 18), (9)
, 110)! : Arranged in a magnetic circuit consisting of ;n
Since it is driven by electromagnetic force in the direction of arrows A and J in the figure, the gimbal spring (4a), which is an 11-movement unit with the coil bobbin (3), and by extension the magnetic head (1) are also driven in the same direction to track the track. The discrepancy will be resolved.
従来のトラッキング駆動装置は以」二のように構成され
ているので、磁気ヘッド（１１の位置を知ることができ
ない。それゆえ、可動ヘッドにて記録を行う場合、ヘッ
ド高さを特定することができず、ヘッド間段差が生じた
り、位置を固定することができずトラックが曲がってし
まうなどという問題点があった。Since the conventional tracking drive device has the following configuration, the position of the magnetic head (11) cannot be known. Therefore, when recording with a movable head, it is impossible to specify the head height. However, there were problems such as unevenness between the heads and the track being curved because the position could not be fixed.
この９ＩＩＱは上記のような間８点を解消するため！−
なされたもので、ヘッド高さを調整でき、ヘッド間段差
をなくすことができると共に、記録時に電気的に位置を
固定できるトラッキング駆動装置を得ることを目的とす
る。This 9IIQ is to eliminate the 8 points mentioned above! −
The object of the present invention is to provide a tracking drive device which can adjust head height, eliminate steps between heads, and electrically fix the position during recording.
１課題を解決するための手段］
この発明によるトラッキング駆動装置７ｔは、円形数バ
ネの磁気ヘッドを支持するため設けられた延Ｌ（部と同
じ形状の延長部を反対側にも設けて反射面をＪｆａ成す
ると」（に、反射面の対向する位置に光源と光検知器を
設けたものである。1. Means for Solving Problems] A tracking drive device 7t according to the present invention has an extension L provided for supporting a magnetic head made of several circular springs. When Jfa is constructed, a light source and a photodetector are provided at opposing positions on the reflective surface.
１作用］
この発明におけるトラッキング駆動装置は、円形板バネ
に設けた磁石へ・ノドの反対側に反射面を設けて、発光
素ｒの光源を上記反射面を介して２分割光検知器に入射
するようにしたので、２分割光検知器に入射する光分布
により磁気ヘッドイ装置を検出できる。1 Effect] The tracking drive device according to the present invention is provided with a reflective surface on the opposite side of the magnet and throat provided on the circular plate spring, and makes the light source of the light emitting element r enter the two-split photodetector through the reflective surface. As a result, the magnetic head device can be detected based on the distribution of light incident on the two-split photodetector.
［発明の実施例］
以ド、この発明の一実施例を図面にもとづいて説明する
。第１図はこの発明の一実施例におけるトラッキング駆
動装置の要部斜視図、第２図は位１ｎ検出の原理説明図
、第３図および第４図はシンバルばわｎｌ動部の位置と
光検知器の出力の関係を示（−図である。なお図におい
て、第５図と同一・または相当ｉｔｓ分には同一符号を
付している。[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described based on the drawings. Fig. 1 is a perspective view of the main parts of a tracking drive device according to an embodiment of the present invention, Fig. 2 is an explanatory diagram of the principle of position 1n detection, and Figs. 3 and 4 show the position and light of the cymbal movement part The relationship between the outputs of the detectors is shown (-). In the figure, the same or corresponding parts as in FIG. 5 are given the same reference numerals.
図において、 １１０１）は円形板バネであるシンバ
ルばわで、内周部より磁気ヘッド（１）を支持するため
に設けられた延長部（１０１ｄｌと同じ形状の延長部（
ｌｏＩｃ）を１８０°対向する側にも設け、先端には反
射面である反射ミラー（＋０２）が固定されている。
（＋０３１は発光本Ｔなどの光源、 ＋１０４１は２分
割光検知器である。In the figure, reference numeral 1101) indicates a cymbal spring, which is a circular leaf spring, and has an extension part (101dl) with the same shape as the extension part (101dl) provided to support the magnetic head (1) from the inner circumference.
loIc) are also provided on 180° opposing sides, and a reflective mirror (+02), which is a reflective surface, is fixed at the tip.
(+031 is a light source such as a light emitting book T, +1041 is a two-split photodetector.
次に動作に−）いて説明する。Next, I will explain the operation.
第２図は第１図において一点、＄ｉ′ｌ線Ｂ −８に沿
った一部の断面図である。［、［：、ｒ）もしくは半導
体レーザなどの光源（＋０３）より出射した尤は反射ミ
ラー（＋０２１ により及射し、２分割光検知器（１０
４＞に入ｑ−ｔする。２分割光検知器（＋０４１１の光
強度分布は、第３図に示すようになる。第３図において
、横軸は上記−・点鎖線Ｂ ｌの位置である。光源（＋
０３１ は発散光源であり、光源（＋０３）より離れる
にしたがって光強度分布は広がりピーク強度が低下する
。このため（ｂ）に示したように、光源１１０３） と
反射ミラー（＋０２）間の距離が近い場合には、光強度
分布は光源（＋０３）近傍にかたよっており、光源１１
０３）に近い方の光検知器への入射光量が大きい。しか
し、距離が離れると（ａｌ に示したようにピーク強度
が低トし、かつなだらかな分布となるので、光源（１０
３）側の光検知器への入射光４：が低ドして、反対側の
光検知器への入射光量は増加する。このため、２分割光
検知器（＋０４）の差をとった出力は第４図に示すよう
になり、位置検出ができる。。FIG. 2 is a sectional view of a portion of FIG. 1 taken along the $i'l line B-8. The light emitted from a light source (+03) such as [, [:, r) or a semiconductor laser is reflected by a reflecting mirror (+021), and is detected by a two-split photodetector (10
4> Enter q-t. The light intensity distribution of the two-split photodetector (+0411 is as shown in FIG. 3. In FIG.
031 is a diverging light source, and the light intensity distribution widens and the peak intensity decreases as the distance from the light source (+03) increases. Therefore, as shown in (b), when the distance between the light source 1103) and the reflecting mirror (+02) is short, the light intensity distribution is biased near the light source (+03), and the light source 11
The amount of light incident on the photodetector closer to 03) is larger. However, as the distance increases (as shown in al), the peak intensity decreases and becomes a gentle distribution, so the light source (10
3) The amount of light 4: incident on the photodetector on the side decreases, and the amount of light incident on the photodetector on the opposite side increases. Therefore, the differential output of the two-split photodetector (+04) becomes as shown in FIG. 4, and the position can be detected. .
なお、１．記実施例では、光線を反射する手段として、
反射ミラーをジンバルばねに固定したが、これは反射テ
ープを接着してもよいし、シンバルばねの相当部にアル
ミ蒸着を施したものを使用してもよい。In addition, 1. In the embodiment described above, as a means for reflecting light rays,
Although the reflective mirror is fixed to the gimbal spring, a reflective tape may be attached thereto, or a cymbal spring with a corresponding portion coated with aluminum may be used.
また、上記実施例では光源として発散光を使用する場合
について説明したが、＝Ｆ行光を出射するような光源を
使用しても同様の効果を得ることができる。。Further, in the above embodiment, a case was explained in which a diverging light is used as a light source, but the same effect can be obtained even if a light source that emits =F line light is used. .
〔発明の効果］
以ｌ、のように、この発明によれば光学的手段を用いて
磁気ヘッドの位置を検出できるように構成したので、電
気的に可動部位１２＋′を１＾ｌ定する制御ができ、ｉ
ｉ動ヘッドによる記録時にトラック段差が牛したり、ト
ラシフ曲がりが牛しるという問題点が解消された。また
、アクチュエータに関してオブザーバを構成してアクチ
ュエータ可動部の速度を求めることができ、この情報を
もとに共振点で電気的ダンピングをかけることも■１能
になった。[Effects of the Invention] As described below, according to the present invention, since the position of the magnetic head can be detected using optical means, control for electrically determining the movable portion 12+' by 1^l is possible. can be done, i
Problems such as uneven track height and uneven track shift when recording with an i-motion head have been solved. In addition, it is now possible to configure an observer for the actuator to determine the speed of the actuator's moving parts, and to apply electrical damping at the resonance point based on this information.
第１図はこの発明の一実施例によるトラッキング駆動装
置の要部斜視図、第２図は第１図のＢ−１３にと）った
一部の断面図、第３図および第４図はシンバルばね１１
）動部の位置と光検知器の出力の関係を示す図、第５図
は従来のトラッキング駆動装置の断面図、第６図は従来
のトラッキング駆動装置ｎのジンバルばねの斜視図であ
る。
（１）・・・磁気ヘッド、 （２）−・・円筒形コイ
ル（制御用コイル） （３）−・・コイルボビン、
（４ｃ）・・・取付部、 （５）、（６）−・・永
久磁石、（７）〜（１ｏ）・・・ヨーク、ｆｌｏｌｌ−
ＩＩＩ形扱ハネ（シンハルハね） 、 （＋０２）・
・・及射面（反射ミラー’） （＋０３）−・・発
光素子（光源）、 （＋０４１−２分割光検知器。
なお、図中の同一符号は同一もしくは相当部分を示す６
、FIG. 1 is a perspective view of a main part of a tracking drive device according to an embodiment of the present invention, FIG. 2 is a partial cross-sectional view taken along line B-13 in FIG. 1, and FIGS. cymbal spring 11
5 is a sectional view of a conventional tracking drive device, and FIG. 6 is a perspective view of a gimbal spring of a conventional tracking drive device n. (1)...Magnetic head, (2)--Cylindrical coil (control coil) (3)--Coil bobbin,
(4c)...Mounting part, (5), (6)--Permanent magnet, (7)-(1o)...Yoke, flower-
Type III handle (Shinharu Hane), (+02)・
...Emission surface (reflection mirror') (+03) - ... Light emitting element (light source), (+041 - 2-split photodetector. The same reference numerals in the figures indicate the same or equivalent parts 6
,
Claims (1)
取付部に取り付けたコイルボビンに捲着する円筒形コイ
ルと、ヨークと永久磁石とからなり、かつこれらの間に
環状ギャップを有した磁気発生器とを具備し、上記円形
板バネの一方には、コイルボビン取付部と一体化した磁
気ヘッド取付部を設け、１対の円形板バネを平行に一定
の間隔をあけて配置し、上記円筒形コイルを上記磁気発
生器の環状ギャップに配置し、所定の電流を印加するこ
とにより磁気ヘッドを駆動するトラッキング駆動装置に
おいて、上記磁気ヘッドと反対側の取付部に反射面を設
け、上記反射面に対向する位置に発光素子と２分割光検
知器を備え、光検知器の出力より磁気ヘッドの位置を検
出することを特徴とするトラッキング駆動装置。A magnetic generator consisting of a pair of circular leaf springs having a coil bobbin attachment part, a cylindrical coil wound around the coil bobbin attached to the attachment part, a yoke and a permanent magnet, and having an annular gap between them. A magnetic head mounting portion integrated with a coil bobbin mounting portion is provided on one of the circular leaf springs, the pair of circular leaf springs are arranged parallel to each other at a constant interval, and the cylindrical coil is placed in the annular gap of the magnetic generator, and in a tracking drive device that drives a magnetic head by applying a predetermined current, a reflective surface is provided on the mounting part on the opposite side to the magnetic head, and the reflective surface is opposed to the reflective surface. A tracking drive device comprising a light emitting element and a two-split photodetector at a position where the magnetic head is positioned, and detecting the position of a magnetic head from the output of the photodetector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1281406A JPH0677298B2 (en) | 1989-10-26 | 1989-10-26 | Tracking drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1281406A JPH0677298B2 (en) | 1989-10-26 | 1989-10-26 | Tracking drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03141012A true JPH03141012A (en) | 1991-06-17 |
| JPH0677298B2 JPH0677298B2 (en) | 1994-09-28 |
Family
ID=17638707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1281406A Expired - Fee Related JPH0677298B2 (en) | 1989-10-26 | 1989-10-26 | Tracking drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0677298B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426419A (en) * | 2011-11-25 | 2012-04-25 | 中国科学院光电技术研究所 | Frequency response characteristic analyzing method of whole consisting of photoelectric tracking system and vibration isolating device |
-
1989
- 1989-10-26 JP JP1281406A patent/JPH0677298B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426419A (en) * | 2011-11-25 | 2012-04-25 | 中国科学院光电技术研究所 | Frequency response characteristic analyzing method of whole consisting of photoelectric tracking system and vibration isolating device |
| CN102426419B (en) * | 2011-11-25 | 2014-06-18 | 中国科学院光电技术研究所 | Frequency response characteristic analyzing method of whole consisting of photoelectric tracking system and vibration isolating device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0677298B2 (en) | 1994-09-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |