JPH02152023A - Optical pickup device - Google Patents

Optical pickup device

Info

Publication number
JPH02152023A
JPH02152023A JP30455088A JP30455088A JPH02152023A JP H02152023 A JPH02152023 A JP H02152023A JP 30455088 A JP30455088 A JP 30455088A JP 30455088 A JP30455088 A JP 30455088A JP H02152023 A JPH02152023 A JP H02152023A
Authority
JP
Japan
Prior art keywords
coil
coil holder
tracking
holder
optical pickup
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
JP30455088A
Other languages
Japanese (ja)
Inventor
Yasushi Nawata
縄田 康
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP30455088A priority Critical patent/JPH02152023A/en
Publication of JPH02152023A publication Critical patent/JPH02152023A/en
Pending legal-status Critical Current

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  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To prevent loosening of a coil due to supply of an overcurrent by forming one or both fitting parts of the coil on a coil holder and forming a clipping part, which press-fits the coil to the coil holder, in the end part of the fitting part as one body. CONSTITUTION:Almost all of the outside peripheral surface of a tracking coil 2 is covered with a clipping part 3a formed in the end part of a fitting part 3 of a coil holder 1 as one body. Thus, the tracking coil 2 is held between the innermost peripheral part and the outermost peripheral part and is fixed, and therefore, loosening of the coil is prevented though the adhesive strength to the coil holder 1 is reduced by heating due to flow of the overcurrent to the tracking coil or a shock or the like occurs by the collision between the coil holder 1 and a stopper.

Description

【発明の詳細な説明】 〔産業上の利用分舒〕 この発明は、光ピックアップ装置の対物レンズ駆動コイ
ル、特にそのコイルホルダーに関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to an objective lens drive coil for an optical pickup device, and particularly to a coil holder thereof.

〔従来の技術〕[Conventional technology]

第3図に従来のトラッキングコイル接着部の平面図を示
す。図において、1はコイルホルダー2はディスク平面
に平行な方向にコイルホルダーを駆動させるためのコイ
ル(以下、トラッキングコイルと記す)、3はトラッキ
ングコイル2を取り付け、接着するための前記コイルホ
ルダー1に一体成形された嵌合部で、トラッキングコイ
ル2は嵌合部3の先端部に沿って挿入し、トラッキング
コイル2と嵌合部3との受は面に接着剤を塗布し、接着
固定される。
FIG. 3 shows a plan view of a conventional tracking coil bonding section. In the figure, 1 is a coil holder 2 for driving the coil holder in a direction parallel to the disk plane (hereinafter referred to as a tracking coil), and 3 is a coil holder 1 for attaching and bonding the tracking coil 2. The tracking coil 2 is inserted along the tip of the fitting part 3 in an integrally molded fitting part, and adhesive is applied to the surface of the receiver between the tracking coil 2 and the fitting part 3, and the tracking coil 2 and the fitting part 3 are fixed with adhesive. .

第4図に従来のトラッキング駆動部の平面図を示す。4
はマグネット、5はシャフト、6は対物レンズ、7は回
転方向のストッパー、8は軸受である。軸受8はシャフ
ト5と摺動して回転方向及び上下方向に動くことができ
る。コイルホルダー1が回転方向に動く時に回転角度に
制限を行うのがストッパー7である。トラッキングコイ
ル2には第4図に示す方向に電流を流している。
FIG. 4 shows a plan view of a conventional tracking drive section. 4
is a magnet, 5 is a shaft, 6 is an objective lens, 7 is a stopper in the rotational direction, and 8 is a bearing. The bearing 8 slides on the shaft 5 and can move in the rotational direction and in the vertical direction. The stopper 7 limits the rotation angle when the coil holder 1 moves in the rotational direction. A current is passed through the tracking coil 2 in the direction shown in FIG.

次に動作について説明する。Next, the operation will be explained.

第4図に示すように、マグネット4による磁界内にある
トラッキングコイル2に電流を流すと、フレミングの左
手の法則からコイルホルダー1はシャフト5を中心とし
時計方向に力Fを受け、回転をする。
As shown in Fig. 4, when a current is applied to the tracking coil 2 which is within the magnetic field of the magnet 4, the coil holder 1 receives a force F in a clockwise direction around the shaft 5 and rotates according to Fleming's left hand rule. .

一方、トラッキングコイル2に流れろ電流の向きを逆に
すると、力Fは反時計方向に働き、コイルホルダー1は
逆回転となる。
On the other hand, when the direction of the current flowing through the tracking coil 2 is reversed, the force F acts counterclockwise, causing the coil holder 1 to rotate in the opposite direction.

また、トラッキングコイル2への通電電流を変化させる
ことにより、力Fを変化でき、コイルホルダー1の回転
角を調整できる。
Further, by changing the current applied to the tracking coil 2, the force F can be changed, and the rotation angle of the coil holder 1 can be adjusted.

以上のように、トラッキングコイル2への通電電流の大
きさ、向きによって対物レンズ6のトラッキング方向の
動作をコントロールでき、CDのトラッキング追従を実
現させろ。
As described above, the operation of the objective lens 6 in the tracking direction can be controlled by the magnitude and direction of the current applied to the tracking coil 2, thereby realizing tracking of the CD.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上記のような従来の光ピックアップ装置では、トラッキ
ングコイル2に過電流が流れると、トラッキングコイル
2の発熱によるコイルホルダー1との接着力の低下及び
力Fによりコイルホルダー1がストッパー7に急激に衝
突する際の衝撃、この2点によって、第5図に示すよう
にトラッキングコイル2がバラクるという不具合を生じ
ることがあった。
In the conventional optical pickup device as described above, when an overcurrent flows through the tracking coil 2, the adhesive force between the tracking coil 2 and the coil holder 1 decreases due to heat generation, and the coil holder 1 suddenly collides with the stopper 7 due to the force F. Due to these two points, the tracking coil 2 may become loose as shown in FIG. 5.

この発明は上記のような課題を解決するためになされた
もので、トラッキングコイル2に過電流が流れても、バ
ラクない光ピックアップ装置を得ることを目的とする。
The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain an optical pickup device that does not become unstable even when an overcurrent flows through the tracking coil 2.

〔課題を解決するための手段〕[Means to solve the problem]

この発明に係る光ピックアップ装置は、コイルホルダー
の嵌合部の端部に、コイルを該コイルホルダーに圧着す
る挾持部を一体形成したものである。
In the optical pickup device according to the present invention, a clamping portion for crimping the coil to the coil holder is integrally formed at the end of the fitting portion of the coil holder.

〔作用〕[Effect]

乙の発明における嵌合部の挾持部はコイルを外力より保
持し、コイルのバラクを防止する。
The holding portion of the fitting portion in the invention of Part B holds the coil against external force and prevents the coil from becoming loose.

〔実施例〕〔Example〕

す下、この発明の一実施例を図について説明する。 An embodiment of the present invention will now be described with reference to the drawings.

第1図はこの発明による光ピックアップ装置のトラッキ
ング駆動部を示す平面図で、図において、3aは嵌合部
3の端部に一体形成したトラッキングコイル2のバラク
防止用の挾持部であり、機械的なカシメによる圧着ある
いは熱的圧着手段によって形成される。第2図は挾持部
3aを形成する前の嵌合部3の状態を示したものである
FIG. 1 is a plan view showing the tracking drive section of the optical pickup device according to the present invention. In the figure, 3a is a clamping section for preventing the tracking coil 2 from coming loose, which is integrally formed at the end of the fitting section 3. It is formed by crimping by mechanical crimping or thermal crimping. FIG. 2 shows the state of the fitting part 3 before forming the clamping part 3a.

次に動作について説明する。Next, the operation will be explained.

第1図のようにコイルホルダー1の挾持部3aにてトラ
ッキングコイル2の外周のほぼ全面を覆ってしまうこと
で、トラッキングコイル2は最内周部と最外周部の両方
向より保持され、固定されろことになる。この状態では
、トラッキングコイル2に過電流が流れ、トラッキング
コイル2の発熱によるコイルホルダー1に対する接着力
の低下及びコイルホルダー1とストッパー7との衝突に
よる衝撃等が生じても、バラクることはない。
As shown in Figure 1, by covering almost the entire outer circumference of the tracking coil 2 with the clamping part 3a of the coil holder 1, the tracking coil 2 is held and fixed from both the innermost and outermost circumferences. It's going to be a long time ago. In this state, even if an overcurrent flows through the tracking coil 2, the adhesive force to the coil holder 1 decreases due to the heat generated by the tracking coil 2, or a shock occurs due to a collision between the coil holder 1 and the stopper 7, it will not break. .

なお、この実施例では、トラッキングコイルについて説
明したが、フォーカスコイルについても同様のことが行
える。
In this embodiment, the tracking coil has been described, but the same can be done for the focus coil.

〔発明の効果〕〔Effect of the invention〕

以上のように、この発明によれば、光ピックアップ装置
において、コイルホルダーに形成した嵌合部の端部に、
コイルの外周部を圧着する挾持部を一体成形することで
コイルの固定が強化され、コイルへ過電流が通電されて
も、コイルのバラクがなく、安定した装置を得ることが
できるという効果がある。
As described above, according to the present invention, in the optical pickup device, at the end of the fitting part formed on the coil holder,
By integrally molding the clamping part that crimps the outer circumference of the coil, the fixation of the coil is strengthened, and even if an overcurrent is applied to the coil, there is no looseness in the coil, making it possible to obtain a stable device. .

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明の一実施例を示す光ピックアップ装置
のトラッキング駆動部の平面図、第2図は挾持部を形成
する前の嵌合部の状態を示した平面図、第3図は従来の
コイル接着部の平面図、第4図は従来のトラッキング駆
動部の平面図、第5図はそのコイルがバラクな状態を示
す平面図である。 1はコイルホルダー、2はトラッキングコイル、3は嵌
合部、3aは挾持部である。 なお、各図中同一符号は同−又は相当部分を示す。 代理人 大 岩 増 雄(外2名) 第1閃 1 コ僧しホルr 2 トラ、午、ブコづ1し 3 社合婦 3α 扶乃19 、:J−2図 ブイ・3図 書(自発) 事件の表示 特願昭63−304550 号 補正をする者 事件との関係  特許出願人 住 所    東京都千代田区丸の内二丁目2番3号名
 称  (601)三菱電機株式会社代表者志岐守哉 代  理 住所 東京都千代田区丸の内二丁目2番3号 三菱電機株式会社内 (7375)弁理士大岩増雄 (連絡先03(213)3421特許部)゛(・5図
FIG. 1 is a plan view of a tracking drive section of an optical pickup device showing an embodiment of the present invention, FIG. 2 is a plan view showing a state of a fitting section before forming a clamping section, and FIG. 3 is a plan view of a conventional optical pickup device. FIG. 4 is a plan view of a conventional tracking drive section, and FIG. 5 is a plan view showing the coil in a loose state. 1 is a coil holder, 2 is a tracking coil, 3 is a fitting part, and 3a is a clamping part. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Masuo Oiwa (2 others) 1st Sen 1 Kososhihoru r 2 Tora, Horse, Bukozu 1shi 3 Social Worker 3α Funo 19 ,: J-2 figure buoy, 3 books (spontaneous) Indication of the case Patent application No. 1983-304550 Person making the amendment Relationship to the case Patent applicant Address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Osamu Shiki Moriyayo, Representative of Mitsubishi Electric Corporation Address Mitsubishi Electric Corporation, 2-2-3 Marunouchi, Chiyoda-ku, Tokyo (7375) Masuo Oiwa, Patent Attorney (Contact: 03 (213) 3421 Patent Department) (Figure 5)

Claims (1)

【特許請求の範囲】[Claims] ディスク上に集光するための対物レンズを有するコイル
ホルダーと、このコイルホルダーに該コイルホルダーを
ディスク平面に平行な方向に駆動させるためのコイルと
ディスク平面に直角な方向に駆動させるためのコイルを
接着固定した光ピックアップ装置において、前記コイル
ホルダーに前記コイルのいずれか一方または両方を嵌合
させる嵌合部を一体成形し、この嵌合部の端部に前記コ
イルをコイルホルダーに圧着する挾持部を一体形成した
ことを特徴とする光ピックアップ装置。
A coil holder having an objective lens for focusing light onto a disk, a coil for driving the coil holder in a direction parallel to the disk plane, and a coil for driving the coil holder in a direction perpendicular to the disk plane. In the adhesively fixed optical pickup device, a fitting portion for fitting one or both of the coils into the coil holder is integrally molded, and a clamping portion for crimping the coil to the coil holder at an end of the fitting portion. An optical pickup device characterized by integrally forming.
JP30455088A 1988-12-01 1988-12-01 Optical pickup device Pending JPH02152023A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30455088A JPH02152023A (en) 1988-12-01 1988-12-01 Optical pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30455088A JPH02152023A (en) 1988-12-01 1988-12-01 Optical pickup device

Publications (1)

Publication Number Publication Date
JPH02152023A true JPH02152023A (en) 1990-06-12

Family

ID=17934343

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30455088A Pending JPH02152023A (en) 1988-12-01 1988-12-01 Optical pickup device

Country Status (1)

Country Link
JP (1) JPH02152023A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030064494A (en) * 2002-01-28 2003-08-02 삼성전기주식회사 Optical Pick-up Actuator
KR100486272B1 (en) * 2002-10-15 2005-04-29 삼성전자주식회사 An optical pickup actuator and an optical disk drive using the same
KR100510539B1 (en) * 2003-08-05 2005-08-26 삼성전자주식회사 Magnet having depressed pattern and Optical pickup actuator comprising the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030064494A (en) * 2002-01-28 2003-08-02 삼성전기주식회사 Optical Pick-up Actuator
KR100486272B1 (en) * 2002-10-15 2005-04-29 삼성전자주식회사 An optical pickup actuator and an optical disk drive using the same
KR100510539B1 (en) * 2003-08-05 2005-08-26 삼성전자주식회사 Magnet having depressed pattern and Optical pickup actuator comprising the same

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