JPH06333252A - Optical pickup - Google Patents

Optical pickup

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Publication number
JPH06333252A
JPH06333252A JP12006693A JP12006693A JPH06333252A JP H06333252 A JPH06333252 A JP H06333252A JP 12006693 A JP12006693 A JP 12006693A JP 12006693 A JP12006693 A JP 12006693A JP H06333252 A JPH06333252 A JP H06333252A
Authority
JP
Japan
Prior art keywords
track
recording medium
coil
optical recording
focus
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
Application number
JP12006693A
Other languages
Japanese (ja)
Inventor
Mitsuru Watanabe
満 渡辺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP12006693A priority Critical patent/JPH06333252A/en
Publication of JPH06333252A publication Critical patent/JPH06333252A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To simplify the assembling and to miniaturize a magnetic circuit by superposing no focusing force generation side on a tracking force generation side of a focus coil and a track coil with a bobbin shape. CONSTITUTION:The one ends of four of supporting members 22 with elasticity are stuck to a fixed part 21. The magnetic flux B nearly parallel to a recording surface D of an optical recording medium is generated by a magnet 26 and the magnetic circuits 23, 24. A beam out-goes from an objective lens 28 to the recording surface D. When a current flows through the focus coil 29 by a control circuit, since the focusing force generation side is intersected orthogonally with the magnetic flux B, the thrust approaching/separating to/from the optical recording medium is generated, and the focusing of an optical pickup is performed. On the other hand, when the current flows through the track coil 30 by the control circuit, since the tracking force generation sides 30a, 30b are intersected orthogonally with the magnetic flux B, the thrust in the direction of traversing a track on the recording surface D is generated, and the tracking of the optical pickup is performed.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、弾性を有し、一端部が
ベース側に固着された支持部材と、光記録媒体の記録面
と略平行な磁束を発生する磁気回路と、前記光記録媒体
の記録面に対してビームを出射する対物レンズを有し、
前記支持部材の他端部が固着されたボビンと、前記光記
録媒体の記録面と略平行に巻回され、前記ボビンに設け
られ、前記磁気回路の磁束に直交し、前記光記録媒体に
接近/離反する推力を発生するフォーカス力発生辺を有
するフォーカスコイルと、前記光磁気記録媒体の記録面
と略垂直な方向に巻回され、前記ボビンに設けられ、前
記磁気回路の磁束に直交し、前記光記録媒体のトラック
を横切る方向の推力を発生するトラック力発生辺を有す
るトラックコイルとを具備する光ピックアップに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support member having elasticity, one end of which is fixed to a base side, a magnetic circuit for generating a magnetic flux substantially parallel to a recording surface of an optical recording medium, and the above optical recording. It has an objective lens that emits a beam to the recording surface of the medium,
A bobbin, to which the other end of the support member is fixed, is wound substantially parallel to the recording surface of the optical recording medium, is provided on the bobbin, is orthogonal to the magnetic flux of the magnetic circuit, and approaches the optical recording medium. / A focus coil having a focus force generation side that generates thrust to be separated from each other, wound in a direction substantially perpendicular to the recording surface of the magneto-optical recording medium, provided on the bobbin, and orthogonal to the magnetic flux of the magnetic circuit, An optical pickup comprising: a track coil having a track force generating side that generates a thrust force in a direction traversing a track of the optical recording medium.

【０００２】[0002]

【従来の技術】先ず、図６から図８を用いて第１の従来
例を説明する。図６は第１の従来例の光ピックアップの
斜視図、図７は図６における側面図、図８は図６におけ
る平面図である。2. Description of the Related Art First, a first conventional example will be described with reference to FIGS. 6 is a perspective view of the optical pickup of the first conventional example, FIG. 7 is a side view of FIG. 6, and FIG. 8 is a plan view of FIG.

【０００３】これらの図において、１は装置側に設けら
れた固定部である。この固定部１には、４本の弾性を有
する支持部材２の一端部が固着されている。３,４は光
記録媒体の記録面 D (図７参照) と略平行な磁束 B を
発生する磁気回路である。これら磁気回路３,４は、外
ヨーク５ａ,内ヨーク５ｂを有する略 U字形のヨーク５
と、このヨーク５の外ヨーク５ａの内壁面に設けられた
磁石６とで構成されている。In these drawings, reference numeral 1 is a fixed portion provided on the apparatus side. One end portion of four elastic supporting members 2 is fixed to the fixing portion 1. Magnetic circuits 3 and 4 generate a magnetic flux B substantially parallel to the recording surface D of the optical recording medium (see FIG. 7). These magnetic circuits 3 and 4 have a substantially U-shaped yoke 5 having an outer yoke 5a and an inner yoke 5b.
And a magnet 6 provided on the inner wall surface of the outer yoke 5a of the yoke 5.

【０００４】７は光記録媒体の記録面 D に対してビー
ムを出射する対物レンズ８を有し、支持部材２の他端部
が固着されたボビンである。９は光記録媒体の記録面 D
と略平行に巻回され、ボビン７に設けられ、磁気回路
３,４の磁束 B に直交し、光記録媒体に接近/離反する
推力を発生するフォーカス力発生辺９ａ,９ｂを有する
フォーカスコイルである。A bobbin 7 has an objective lens 8 for emitting a beam to a recording surface D of the optical recording medium, and the other end of the supporting member 2 is fixed to the bobbin. 9 is the recording surface D of the optical recording medium
A focus coil which is wound substantially in parallel with, is provided on the bobbin 7, is orthogonal to the magnetic flux B of the magnetic circuits 3 and 4, and has the focus force generating sides 9a and 9b that generate thrust force that moves toward and away from the optical recording medium. is there.

【０００５】１０は光磁気記録媒体の記録面 D と略垂
直な方向に巻回され、フォーカスコイル９のフォーカス
力発生辺９ａ,９ｂ (ボビン７) にそれぞれ２つ設けら
れ、磁気回路の磁束 B に直交し、光記録媒体のトラッ
クを横切る方向の推力を発生するトラック力発生辺１０
ａ,１０ｂを有するトラックコイルである。Numeral 10 is wound in a direction substantially perpendicular to the recording surface D of the magneto-optical recording medium, two focusing force generating sides 9a and 9b (bobbin 7) of the focusing coil 9 are provided, and a magnetic flux B of the magnetic circuit is formed. A track force generating side 10 that generates a thrust force in a direction orthogonal to the track of the optical recording medium.
It is a track coil having a and 10b.

【０００６】次に、上記構成の作動を説明する。図示し
ない制御回路がフォーカスコイル９に電流を流すと、フ
ォーカス力発生辺９ａ,９ｂは磁気回路３,４の磁束 B
に直交しているので、これらフォーカス力発生辺９ａ,
９ｂには、光記録媒体に接近/離反する推力 (F) を発生
し、光ピックアップのフォーカシングが行われる。Next, the operation of the above configuration will be described. When a control circuit (not shown) supplies a current to the focus coil 9, the focus force generating sides 9a and 9b cause the magnetic flux B of the magnetic circuits 3 and 4 to flow.
Since they are orthogonal to the focus force generation side 9a,
At 9b, a thrust (F) that moves toward and away from the optical recording medium is generated, and focusing of the optical pickup is performed.

【０００７】又、図示しない制御回路がトラックコイル
コイル１０に電流を流すと、トラック力発生辺１０ａ,
１０ｂは磁気回路３,４の磁束 B に直交しているので、
これらトラック力発生辺１０ａ,１０ｂには、光記録媒
体の記録面 D のトラックを横切る方向推力 (T) を発生
し、光ピックアップのトラッキングが行われる。When a control circuit (not shown) applies a current to the track coil coil 10, the track force generating side 10a,
Since 10b is orthogonal to the magnetic flux B of the magnetic circuits 3 and 4,
On these track force generating sides 10a and 10b, a thrust force (T) in a direction crossing the track of the recording surface D of the optical recording medium is generated, and tracking of the optical pickup is performed.

【０００８】次に、図９から図１１を用いて第２の従来
例を説明する。図９は第２の従来例の光ピックアップの
斜視図、図１０は図９における側面図、図１１は図９に
おける平面図である。Next, a second conventional example will be described with reference to FIGS. 9 to 11. 9 is a perspective view of a second conventional optical pickup, FIG. 10 is a side view of FIG. 9, and FIG. 11 is a plan view of FIG.

【０００９】これらの図において、１１は装置側に設け
られた固定部である。この固定部１１には、４本の弾性
を有する支持部材１２の一端部が固着されている。１
３,１４は光記録媒体の記録面 D (図１０参照) と略平
行な磁束 B を発生する磁気回路である。これら磁気回
路１３,１４は、外ヨーク１５ａ,内ヨーク１５ｂを有す
る略 U 字形のヨーク１５と、このヨーク１５の外ヨー
ク１５ａの内壁面に設けられた磁石１６とで構成されて
いる。In these figures, reference numeral 11 is a fixing portion provided on the apparatus side. One end of each of four elastic supporting members 12 is fixed to the fixing portion 11. 1
Magnetic circuits 3 and 14 generate a magnetic flux B substantially parallel to the recording surface D (see FIG. 10) of the optical recording medium. These magnetic circuits 13 and 14 are composed of a substantially U-shaped yoke 15 having an outer yoke 15a and an inner yoke 15b, and a magnet 16 provided on the inner wall surface of the outer yoke 15a of the yoke 15.

【００１０】１７は光記録媒体の記録面 D に対してビ
ームを出射する対物レンズ１８を有し、支持部材１２の
他端部が固着されたボビンである。１９は光記録媒体の
記録面 D と略平行に巻回され、ボビン１７に設けら
れ、磁気回路１３,１４の磁束 B に直交し、光記録媒体
に接近/離反する推力を発生するフォーカス力発生辺１
９ａ,１９ｂを有するフォーカスコイルである。Reference numeral 17 is a bobbin having an objective lens 18 for emitting a beam to the recording surface D of the optical recording medium, and the other end of the supporting member 12 being fixed. Reference numeral 19 is a winding force which is wound substantially parallel to the recording surface D of the optical recording medium, is provided on the bobbin 17, is orthogonal to the magnetic flux B of the magnetic circuits 13 and 14, and generates a thrust force that moves toward and away from the optical recording medium. Side 1
It is a focus coil having 9a and 19b.

【００１１】２０は光磁気記録媒体の記録面 D と略垂
直な方向に巻回され、フォーカスコイル１９のフォーカ
ス力発生辺９ａ,９ｂ (ボビン７) を巻回するように２
つ設けられ、磁気回路の磁束 B に直交し、光記録媒体
のトラックを横切る方向の推力を発生するトラック力発
生辺２０ａ,２０ｂを有するトラックコイルである。The reference numeral 20 is wound in a direction substantially perpendicular to the recording surface D of the magneto-optical recording medium, and the focus force generating sides 9a and 9b (bobbin 7) of the focus coil 19 are wound in a direction 2
The track coil is provided with two track force generating sides 20a and 20b which are orthogonal to the magnetic flux B of the magnetic circuit and generate thrust in the direction transverse to the track of the optical recording medium.

【００１２】次に、上記構成の作動を説明する。図示し
ない制御回路がフォーカスコイル１９に電流を流すと、
フォーカス力発生辺１９ａ,１９ｂは磁気回路１３,１４
の磁束 B に直交しているので、これらフォーカス力発
生辺１９ａ,１９ｂには、光記録媒体に接近/離反する推
力 (F) を発生し、光ピックアップのフォーカシングが
行われる。Next, the operation of the above configuration will be described. When a control circuit (not shown) supplies a current to the focus coil 19,
The focus force generating sides 19a and 19b are magnetic circuits 13 and 14, respectively.
Since the magnetic flux B is orthogonal to the magnetic flux B, a thrust force (F) for approaching / separating from the optical recording medium is generated on the focus force generating sides 19a, 19b, and focusing of the optical pickup is performed.

【００１３】又、図示しない制御回路がトラックコイル
コイル２０に電流を流すと、トラック力発生辺２０ａ,
２０ｂは磁気回路１３,１４の磁束 B に直交しているの
で、これらトラック力発生辺２０ａ,２０ｂには、光記
録媒体の記録面 D のトラックを横切る方向推力 (T) を
発生し、光ピックアップのトラッキングが行われる。When a control circuit (not shown) supplies a current to the track coil coil 20, the track force generating side 20a,
Since 20b is orthogonal to the magnetic flux B of the magnetic circuits 13 and 14, the track force generating sides 20a and 20b generate a thrust force (T) across the track of the recording surface D of the optical recording medium, and the optical pickup Is tracked.

【００１４】[0014]

【発明が解決しようとする課題】しかし、図６から図８
に示した第１の従来の光ピックアップにおいては、薄い
四角のトラックコイル１０を精度よくフォーカスコイル
９に重ねて接着しなければならず、組み立ての作業性が
悪い。However, FIG. 6 to FIG.
In the first conventional optical pickup shown in (1), the thin square track coil 10 must be accurately overlapped and adhered to the focus coil 9, and the workability of assembly is poor.

【００１５】又、図９から図１１に示した第２の従来の
光ピックアップにおいては、トラックコイル２０の個数
は２個であり、トラックコイル１０が４個必要な第１の
従来の光ピックアップに較べて少なくてすむが、ボビン
１７にフォーカスコイル１９を取付けた後で、トラック
コイル２０を取付けなければならないので、作業性が悪
い。In the second conventional optical pickup shown in FIGS. 9 to 11, the number of track coils 20 is two, and the first conventional optical pickup requires four track coils 10. Although the number is smaller than that of the conventional one, the workability is poor because the track coil 20 must be attached after the focus coil 19 is attached to the bobbin 17.

【００１６】更に、第１及び第２の従来の光ピックアッ
プにおいては、フォーカス発生辺にトラックコイルが重
なるので、磁気回路の磁気ギャップが大きくなり、所定
の磁束を得るには、磁気回路を大きくしなければなら
ず、装置の小型化,低コスト化を疎外する。Furthermore, in the first and second conventional optical pickups, since the track coil overlaps the focus generation side, the magnetic gap of the magnetic circuit becomes large, and the magnetic circuit must be made large to obtain a predetermined magnetic flux. It is necessary to exclude the miniaturization and cost reduction of the device.

【００１７】本発明は、上記問題点に鑑みてなされたも
ので、その目的は、組み立てが簡単で、磁気回路を小型
化可能な光ピックアップを提供することにある。The present invention has been made in view of the above problems, and an object of the present invention is to provide an optical pickup which is easy to assemble and is capable of miniaturizing a magnetic circuit.

【００１８】[0018]

【課題を解決するための手段】上記課題を解決する請求
項１記載の発明は、弾性を有し、一端部がベース側に固
着された支持部材と、光記録媒体の記録面と略平行な磁
束を発生する磁気回路と、前記光記録媒体の記録面に対
してビームを出射する対物レンズを有し、前記支持部材
の他端部が固着されたボビンと、前記光記録媒体の記録
面と略平行に巻回され、前記ボビンに設けられ、前記磁
気回路の磁束に直交し、前記光記録媒体に接近/離反す
る推力を発生するフォーカス力発生辺を有するフォーカ
スコイルと、前記光磁気記録媒体の記録面と略垂直な方
向に巻回され、前記ボビンに設けられ、前記磁気回路の
磁束に直交し、前記光記録媒体のトラックを横切る方向
の推力を発生するトラック力発生辺を有するトラックコ
イルとを具備する光ピックアップにおいて、前記フォー
カスコイルのフォーカス力発生辺と、前記トラックコイ
ルのトラック力発生辺とが重ならないように配設したも
のである。According to a first aspect of the present invention for solving the above-mentioned problems, a supporting member having elasticity and having one end fixed to a base side is substantially parallel to a recording surface of an optical recording medium. A bobbin having a magnetic circuit that generates a magnetic flux, an objective lens that emits a beam toward the recording surface of the optical recording medium, and the other end of the supporting member is fixed, and a recording surface of the optical recording medium. A focus coil that is wound substantially in parallel, is provided on the bobbin, is orthogonal to the magnetic flux of the magnetic circuit, and has a focus force generation side that generates a thrust force that moves toward and away from the optical recording medium; and the magneto-optical recording medium. Track coil, which is wound in a direction substantially perpendicular to the recording surface of the optical disk, is provided on the bobbin, is orthogonal to the magnetic flux of the magnetic circuit, and has a track force generating side for generating a thrust in a direction crossing the track of the optical recording medium. Light with In the pickup, the focus force generating side of the focus coil and the track force generating side of the track coil are arranged so as not to overlap with each other.

【００１９】請求項２記載の発明は、請求項１記載の発
明のフォーカスコイル,トラックコイルはボビン巻であ
るものである。According to a second aspect of the invention, the focus coil and the track coil of the first aspect of the invention are bobbin windings.

【００２０】[0020]

【作用】請求項１記載の発明の光ピックアップにおい
て、磁気回路の磁気ギャップに配設されるフォーカスコ
イルのフォーカス力発生辺と、トラックコイルのトラッ
ク力発生辺とが重ならないようにしたことにより、磁気
ギャップを小さくすることができ、磁気回路を小型化で
きる。According to the optical pickup of the first aspect of the present invention, the focus force generating side of the focus coil disposed in the magnetic gap of the magnetic circuit and the track force generating side of the track coil are prevented from overlapping each other. The magnetic gap can be reduced, and the magnetic circuit can be downsized.

【００２１】請求項２記載の発明の光ピックアップにお
いて、フォーカスコイル,トラックコイルはボビン巻に
したことにより、組み立てが簡単になる。In the optical pickup of the second aspect of the invention, the focus coil and the track coil are bobbin wound, so that the assembly is simplified.

【００２２】[0022]

【実施例】次に図面を用いて本発明の一実施例を説明す
る。図１は本発明の一実施例の光ピックアップの斜視
図、図２は図１における側面図、図３は図１における平
面図、図４は図１におけるボビンを説明する図で (a)
は平面図、 (b) は正面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to the drawings. 1 is a perspective view of an optical pickup according to an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a plan view of FIG. 1, and FIG. 4 is a view for explaining a bobbin in FIG.
Is a plan view and (b) is a front view.

【００２３】これらの図において、２１は装置側に設け
られた固定部である。この固定部２１には、４本の弾性
を有する支持部材２２の一端部が固着されている。２
３,２４は光記録媒体の記録面 D (図２参照) と略平行
な磁束 B を発生する磁気回路である。これら磁気回路
２３,２４は、外ヨーク２５ａ,内ヨーク２５ｂを有する
略 U 字形のヨーク２５と、このヨーク２５の外ヨーク
２５ａの内壁面に設けられた磁石２６とで構成されてい
る。In these figures, reference numeral 21 is a fixing portion provided on the apparatus side. One end of each of four elastic support members 22 is fixed to the fixed portion 21. Two
Magnetic circuits 3 and 24 generate a magnetic flux B substantially parallel to the recording surface D (see FIG. 2) of the optical recording medium. These magnetic circuits 23, 24 are composed of a substantially U-shaped yoke 25 having an outer yoke 25a and an inner yoke 25b, and a magnet 26 provided on the inner wall surface of the outer yoke 25a of the yoke 25.

【００２４】２７は光記録媒体の記録面 D に対してビ
ームを出射する対物レンズ２８を有し、支持部材１２の
他端部が固着されたボビンである。このボビン２７の両
サイドの上面及び下面には、図４に示すように、前後方
向に延出するトラックコイル保持部２７ａが形成され、
更にこれらトラックコイル保持部２７ａの内側には、そ
れぞれフォーカスコイル保持溝２７ｂが形成されてい
る。Reference numeral 27 is a bobbin having an objective lens 28 for emitting a beam to the recording surface D of the optical recording medium, and the other end of the supporting member 12 being fixed. As shown in FIG. 4, track coil holding portions 27a extending in the front-rear direction are formed on the upper and lower surfaces of both sides of the bobbin 27,
Further, inside the track coil holding portions 27a, focus coil holding grooves 27b are formed.

【００２５】２９は光記録媒体の記録面 D と略平行に
巻回され、ボビン２７のフォーカスコイル保持溝２７ｂ
にそれぞれ設けられ、磁気回路２３,２４の磁束 B に直
交し、光記録媒体に接近/離反する推力を発生するフォ
ーカス力発生辺２９ａ,２９ｂを有するフォーカスコイ
ルである。29 is wound substantially parallel to the recording surface D of the optical recording medium, and has a focus coil holding groove 27b of the bobbin 27.
Are focus coils which are provided in the respective magnetic circuits 23 and 24 and which are orthogonal to the magnetic flux B of the magnetic circuits 23 and 24, and have the focus force generating sides 29a and 29b which generate thrust forces that move toward and away from the optical recording medium.

【００２６】３０は光磁気記録媒体の記録面 D と略垂
直な方向に巻回され、ボビン２７のトラックコイル保持
部２７ａにそれぞれ設けられ、磁気回路の磁束 B に直
交し、光記録媒体のトラックを横切る方向の推力を発生
するトラック力発生辺３０ａ,３０ｂを有するトラック
コイルである。Numerals 30 are wound in a direction substantially perpendicular to the recording surface D of the magneto-optical recording medium, respectively provided in the track coil holding portions 27a of the bobbin 27, orthogonal to the magnetic flux B of the magnetic circuit, and track of the optical recording medium. It is a track coil having track force generation sides 30a and 30b that generate thrust in a direction traversing.

【００２７】次に、上記構成の作動を説明する。図示し
ない制御回路がフォーカスコイル２９に電流を流すと、
フォーカス力発生辺２９ａ,２９ｂは磁気回路２３,２４
の磁束 B に直交しているので、これらフォーカス力発
生辺２９ａ,２９ｂには、光記録媒体に接近/離反する推
力 (F) を発生し、光ピックアップのフォーカシングが
行われる。Next, the operation of the above configuration will be described. When a control circuit (not shown) supplies a current to the focus coil 29,
Focusing force generating sides 29a and 29b are magnetic circuits 23 and 24.
Since the magnetic flux B is orthogonal to the magnetic flux B, a thrust force (F) for approaching / separating from the optical recording medium is generated on the focus force generating sides 29a, 29b, and focusing of the optical pickup is performed.

【００２８】又、図示しない制御回路がトラックコイル
コイル３０に電流を流すと、トラック力発生辺３０ａ,
３０ｂは磁気回路１３,１４の磁束 B に直交しているの
で、これらトラック力発生辺３０ａ,３０ｂには、光記
録媒体の記録面 D のトラックを横切る方向推力 (T) を
発生し、光ピックアップのトラッキングが行われる。When a control circuit (not shown) supplies a current to the track coil coil 30, the track force generating side 30a,
Since 30b is orthogonal to the magnetic flux B of the magnetic circuits 13 and 14, a direction thrust (T) across the tracks on the recording surface D of the optical recording medium is generated on these track force generating sides 30a and 30b, and the optical pickup Is tracked.

【００２９】上記構成によれば、先にボビン状にしたフ
ォーカスコイル２９,トラックコイル３０を直接ボビン
２７のフォーカスコイル保持溝２７ｂ,トラックコイル
２７ａに取付けることができる。よって、組み立て作業
性が良好である。According to the above construction, the bobbin-shaped focus coil 29 and the track coil 30 can be directly attached to the focus coil holding groove 27b and the track coil 27a of the bobbin 27. Therefore, the assembling workability is good.

【００３０】又、フォーカスコイル２９のフォーカス力
発生辺２９ａ,２９ｂと、トラックコイル３０のトラッ
ク力発生辺３０ａ,３０ｂが重なる部分が無いので、磁
気回路２３,２４の磁気ギャップを狭くすることでき、
磁気回路の小型化,高性能化が可能となる。Further, since there is no portion where the focus force generating sides 29a and 29b of the focus coil 29 and the track force generating sides 30a and 30b of the track coil 30 overlap, the magnetic gap of the magnetic circuits 23 and 24 can be narrowed.
The magnetic circuit can be downsized and its performance can be improved.

【００３１】尚、本発明は、上記実施例に限定するもの
ではない。例えば、図５に示すように、フォーカスコイ
ル５０のフォーカス力発生辺５０ａ,５０ｂの以外の辺
と、トラックコイル５１のトラック力発生辺５１ａ,５
１ｂ以外の辺とは重なるように構成しても、かまわな
い。The present invention is not limited to the above embodiment. For example, as shown in FIG. 5, the sides of the focus coil 50 other than the focus force generating sides 50 a and 50 b and the track force generating sides 51 a and 5 a of the track coil 51.
It does not matter if it is configured so as to overlap the sides other than 1b.

【００３２】[0032]

【発明の効果】以上述べたように本発明によれば、ボビ
ン状のフォーカスコイル及びトラックコイルのフォーカ
ス力発生辺とトラック力発生辺を重ならないようにした
ことにより、組み立てが簡単で、磁気回路を小型化可能
な光ピックアップを実現することができる。As described above, according to the present invention, the focus force generating side and the track force generating side of the bobbin-shaped focus coil and the track coil are prevented from overlapping with each other, so that the assembly is easy and the magnetic circuit is easy. It is possible to realize an optical pickup that can be miniaturized.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の一実施例の光ピックアップの斜視図で
ある。FIG. 1 is a perspective view of an optical pickup according to an embodiment of the present invention.

【図２】図１における側面図である。FIG. 2 is a side view of FIG.

【図３】図１における平面図である。FIG. 3 is a plan view of FIG.

【図４】図１におけるボビンを説明する図で (a) は平
面図、 (b) は正面図である。4 (a) is a plan view and FIG. 4 (b) is a front view for explaining the bobbin in FIG.

【図５】他の実施例を説明する図である。FIG. 5 is a diagram illustrating another embodiment.

【図６】第１の従来例の光ピックアップの斜視図であ
る。FIG. 6 is a perspective view of an optical pickup of a first conventional example.

【図７】図６における側面図である。FIG. 7 is a side view of FIG.

【図８】図６における平面図である。FIG. 8 is a plan view of FIG.

【図９】第２の従来例の光ピックアップの斜視図であ
る。FIG. 9 is a perspective view of an optical pickup of a second conventional example.

【図１０】図９における側面図である。FIG. 10 is a side view of FIG.

【図１１】図９における平面図である。FIG. 11 is a plan view of FIG. 9.

【符号の説明】[Explanation of symbols]

２１ 固定部 ２２ 支持部材 ２３,２４ 磁気回路 ２５ ヨーク ２６ 磁石 ２７ ボビン ２８ 対物レンズ ２９ フォーカスコイル ２９ａ,２９ｂ フォーカス力発生辺 ３０ トラックコイル ３０ａ,３０ｂ トラック力発生辺 21 Fixed Part 22 Support Member 23, 24 Magnetic Circuit 25 Yoke 26 Magnet 27 Bobbin 28 Objective Lens 29 Focus Coil 29a, 29b Focus Force Generation Side 30 Track Coil 30a, 30b Track Force Generation Side

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 弾性を有し、一端部がベース側に固着さ
れた支持部材（２２）と、光記録媒体の記録面と略平行
な磁束を発生する磁気回路（２３,２４）と、前記光記
録媒体の記録面に対してビームを出射する対物レンズ
（２８）を有し、前記支持部材（２２）の他端部が固着
されたボビン（２７）と、前記光記録媒体の記録面と略
平行に巻回され、前記ボビン（２７）に設けられ、前記
磁気回路（２３,２４）の磁束に直交し、前記光記録媒
体に接近/離反する推力を発生するフォーカス力発生辺
（２９ａ,２９ｂ）を有するフォーカスコイル（２９）
と、 前記光磁気記録媒体の記録面と略垂直な方向に巻回さ
れ、前記ボビン（２７）に設けられ、前記磁気回路（２
３,２４）の磁束に直交し、前記光記録媒体のトラック
を横切る方向の推力を発生するトラック力発生辺（３０
ａ,３０ｂ）を有するトラックコイル（３０）とを具備
する光ピックアップにおいて、 前記フォーカスコイル（２９）のフォーカス力発生辺
（２９ａ,２９ｂ）と、前記トラックコイル（３０）の
トラック力発生辺（３０ａ,３０ｂ）とが重ならないよ
うに配設したことを特徴とする光ピックアップ。1. A support member (22) having elasticity and having one end fixed to a base side, a magnetic circuit (23, 24) for generating a magnetic flux substantially parallel to a recording surface of an optical recording medium, A bobbin (27) having an objective lens (28) that emits a beam toward the recording surface of the optical recording medium, and the other end of the supporting member (22) being fixed to the recording surface of the optical recording medium. A focus force generating side (29a, 29a, which is wound substantially in parallel, is provided on the bobbin (27), is orthogonal to the magnetic flux of the magnetic circuit (23, 24), and generates a thrust force that moves toward and away from the optical recording medium. Focus coil (29) with 29b)
And the magnetic circuit (2), which is wound in a direction substantially perpendicular to the recording surface of the magneto-optical recording medium and is provided on the bobbin (27).
3, 24) which is perpendicular to the magnetic flux of (3, 24) and generates a thrust force in a direction crossing the tracks of the optical recording medium.
an optical pickup comprising a track coil (30) having a, 30b), wherein a focus force generating side (29a, 29b) of the focus coil (29) and a track force generating side (30a) of the track coil (30). , 30b) so as not to overlap with each other. 【請求項２】 前記フォーカスコイル（２９）,トラッ
クコイル（３０）はボビン巻であることを特徴とする請
求項１記載の光ピックアップ。2. The optical pickup according to claim 1, wherein the focus coil (29) and the track coil (30) are bobbin windings.
JP12006693A 1993-05-21 1993-05-21 Optical pickup Pending JPH06333252A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12006693A JPH06333252A (en) 1993-05-21 1993-05-21 Optical pickup

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12006693A JPH06333252A (en) 1993-05-21 1993-05-21 Optical pickup

Publications (1)

Publication Number Publication Date
JPH06333252A true JPH06333252A (en) 1994-12-02

Family

ID=14777049

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12006693A Pending JPH06333252A (en) 1993-05-21 1993-05-21 Optical pickup

Country Status (1)

Country Link
JP (1) JPH06333252A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7684289B2 (en) 2003-02-19 2010-03-23 Fujitsu Ten Limited Actuator for optical pickup, optical pickup, and apparatus for reading or recording information

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7684289B2 (en) 2003-02-19 2010-03-23 Fujitsu Ten Limited Actuator for optical pickup, optical pickup, and apparatus for reading or recording information

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