JPH07210891A - Optical disk provided with brush - Google Patents

Optical disk provided with brush

Info

Publication number
JPH07210891A
JPH07210891A JP6017800A JP1780094A JPH07210891A JP H07210891 A JPH07210891 A JP H07210891A JP 6017800 A JP6017800 A JP 6017800A JP 1780094 A JP1780094 A JP 1780094A JP H07210891 A JPH07210891 A JP H07210891A
Authority
JP
Japan
Prior art keywords
brush
objective lens
optical pickup
optical disk
optical
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
JP6017800A
Other languages
Japanese (ja)
Inventor
Hisao Ishiwatari
久夫 石渡
Kenichi Moriya
賢一 森屋
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP6017800A priority Critical patent/JPH07210891A/en
Publication of JPH07210891A publication Critical patent/JPH07210891A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/121Protecting the head, e.g. against dust or impact with the record carrier

Abstract

PURPOSE:To provide an optical disk provided with a brush in contact with an objective lens, capable of surely cleaning the lens and suppressing the increase of rotational load. CONSTITUTION:In an optical disk provided with a brush 6, the brush 6 for cleaning the objective lens 5 of an optical pickup 4 in a contact therewith is provided on a lead-in part 3 provided with the TOC signal of a disk main body 2. The brush 6 is made of an elastic material and the elasticity at the base part 6a of the brush 6 is set less than that of a tip part 6b.

Description

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

【0001】[0001]

【産業上の利用分野】この発明は、光ピックアップの対
物レンズを清掃することができるブラシを備える光ディ
スクに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc having a brush capable of cleaning an objective lens of an optical pickup.

【0002】[0002]

【従来の技術】光ディスクを用いたデジタルオーディオ
システムとしてコンパクトディスクがあり、このコンパ
クトディスクに記憶情報がピットといわれる突起の有無
で記憶される。このコンパクトディスクに刻まれたピッ
トの有無を検出する再生装置として光ピックアップがあ
り、光ピックアップは光源からの光を対物レンズを介し
てコンパクトディスクの信号面に焦点を合わせ、この信
号面で反射された光を光検出器で検出してピットの有無
を検出する。
2. Description of the Related Art There is a compact disc as a digital audio system using an optical disc, and stored information is stored in this compact disc by the presence or absence of protrusions called pits. There is an optical pickup as a reproducing device that detects the presence or absence of pits engraved on this compact disc.The optical pickup focuses light from a light source through an objective lens onto the signal surface of the compact disc and reflects it on this signal surface. The detected light is detected by a photodetector to detect the presence or absence of pits.

【0003】この光ピックアップの対物レンズにはゴミ
が付着し易く、ゴミが付着すると正確なピットの有無を
検出することができないため、例えばディスク本体に、
光ピックアップの対物レンズに接触して清掃するブラシ
を設けたものがある。
Dust easily adheres to the objective lens of this optical pickup, and if the dust adheres, the presence or absence of pits cannot be accurately detected.
There is a brush provided with a brush that comes into contact with the objective lens of the optical pickup to clean it.

【0004】[0004]

【発明が解決しようとする課題】このようにブラシを備
える光ディスクは、ディスク本体の回転によってブラシ
が対物レンズに接触して自動的に清掃するようになって
おり、例えばブラシを繊維によって形成すると復元力が
小さく対物レンズに接触しなくなり、清掃が充分でな
く、ゴミの付着による検出エラーが生じる虞がある。
The optical disk provided with the brush as described above is designed so that the brush comes into contact with the objective lens and is automatically cleaned by the rotation of the disk body. For example, when the brush is made of fibers, it is restored. The force is so small that it does not come into contact with the objective lens, cleaning is not sufficient, and detection errors may occur due to the adhesion of dust.

【0005】このため、例えばブラシを弾性体等で形成
すると、対物レンズへの圧接力が大きくなるが、光ディ
スクの回転負荷が大きくなって回転ムラが生じるため、
駆動装置を大型化する必要がある等の問題が生じる。
Therefore, for example, when the brush is formed of an elastic body or the like, the pressure contact force to the objective lens increases, but the rotational load of the optical disk increases and uneven rotation occurs.
There arises a problem that it is necessary to upsize the driving device.

【0006】この発明は、かかる点に鑑みてなされたも
ので、対物レンズに接触して確実に清掃することがで
き、しかも回転負荷の増加を抑えることができるブラシ
を備える光ディスクを提供することを目的としている。
The present invention has been made in view of the above circumstances, and provides an optical disk provided with a brush which can be reliably cleaned by contacting an objective lens and which can suppress an increase in rotational load. Has an aim.

【0007】[0007]

【課題を解決するための手段】前記課題を解決するため
に、請求項1記載のブラシを備える光ディスクの発明
は、ディスク本体のTOC信号が設けられるリードイン
部に、光ピックアップの対物レンズに接触して清掃する
ブラシを設け、このブラシを弾性体で形成すると共に、
ブラシの根もと部の弾性力を先端部より弱く設定したこ
とを特徴としている。
In order to solve the above-mentioned problems, the invention of an optical disk having a brush according to claim 1 is such that a lead-in portion of the disk body provided with a TOC signal is brought into contact with an objective lens of an optical pickup. A cleaning brush is provided, and this brush is made of an elastic material,
It is characterized in that the elastic force at the root of the brush is set weaker than at the tip.

【0008】[0008]

【作用】請求項1記載の発明では、ディスク本体のブラ
シを弾性体で形成しており、ブラシに復元力があるため
光ピックアップの対物レンズに接触して確実に清掃する
ことができる。また、ブラシは、その根もと部の弾性力
を先端部より弱く設定してあり、ディスク本体の回転負
荷の増加を抑えることができる。
According to the first aspect of the invention, the brush of the disk body is formed of an elastic body, and since the brush has a restoring force, the brush can contact the objective lens of the optical pickup for reliable cleaning. Further, the elastic force of the root portion of the brush is set to be weaker than that of the tip portion, and it is possible to suppress an increase in the rotational load of the disc body.

【0009】[0009]

【実施例】以下、この発明の光ディスクの実施例を図面
に基づいて説明する。図1は光ディスクの平面図、図2
は図1のII−II線に沿う断面図、図3は図2のIII−III
線に沿う断面図、図4は光ピックアップの対物レンズの
清掃状態を示す図である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the optical disk of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of an optical disc, FIG.
2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is III-III in FIG.
FIG. 4 is a cross-sectional view taken along the line, and FIG. 4 is a view showing a cleaning state of the objective lens of the optical pickup.

【0010】光ディスクを用いたデジタルオーディオシ
ステムとしてコンパクトディスク1があり、このコンパ
クトディスク1に記憶情報がピットといわれる突起の有
無で記憶される。コンパクトディスク1では、ディスク
本体2のTOC信号が設けられるリードイン部3に、光
ピックアップ4の対物レンズ5に接触して清掃するブラ
シ6を設けている。
There is a compact disc 1 as a digital audio system using an optical disc, and stored information is stored in the compact disc 1 by the presence or absence of protrusions called pits. In the compact disc 1, the lead-in portion 3 of the disc body 2 provided with the TOC signal is provided with a brush 6 that comes into contact with the objective lens 5 of the optical pickup 4 for cleaning.

【0011】このブラシ6は、例えばウレタンフォーム
又はポリエチレンフォーム等の弾性体で形成され、ディ
スク本体2の半径方向のラインに沿って形成された取付
溝7に接着剤によって設けられている。ブラシ6の幅L
は、例えば5mm程度、厚さDは1mm程度、高さHは
3.5mmに設定されている。ブラシ6の根もと部6a
には窓部8が形成されており、この窓部8によって先端
部6bより弾性力を弱く設定している。
The brush 6 is made of an elastic material such as urethane foam or polyethylene foam, and is provided with an adhesive in a mounting groove 7 formed along a radial line of the disk body 2. Width L of brush 6
Is set to about 5 mm, the thickness D is set to about 1 mm, and the height H is set to 3.5 mm. Base part 6a of brush 6
A window portion 8 is formed in this, and this window portion 8 sets the elastic force to be weaker than that of the tip portion 6b.

【0012】このコンパクトディスク1をプレーヤーに
装着すると、すぐに自動的に数秒間回転してTOC信号
を読み取り、例えばトータル曲数と合計演奏時間を表示
し、演奏スタンバイになる。
When the compact disc 1 is mounted on the player, it is automatically rotated for a few seconds to read the TOC signal, and for example, the total number of pieces of music and the total playing time are displayed, and the player enters the performance standby mode.

【0013】このコンパクトディスク1に刻まれたピッ
トの有無を検出する再生装置として図4に示す光ピック
アップ4があり、光ピックアップ4はレーザーダイオー
ド9からのレーザビームを対物レンズ5を介してコンパ
クトディスク1の信号面に焦点を合わせ、この信号面で
反射されたレーザビームをフォトダイオード10で検出
してピットの有無を検出する。
There is an optical pickup 4 shown in FIG. 4 as a reproducing apparatus for detecting the presence or absence of pits engraved on the compact disc 1. The optical pickup 4 uses a laser beam from a laser diode 9 through an objective lens 5 to produce a compact disc. Focusing on the signal surface of No. 1, the laser beam reflected by this signal surface is detected by the photodiode 10 to detect the presence or absence of pits.

【0014】この光ピックアップ4の対物レンズ5には
ゴミが付着し易く、ゴミが付着すると正確なピットの有
無を検出することができないため、ディスク本体2に設
けたブラシ6の先端部6bが光ピックアップ4の対物レ
ンズ5に接触して清掃する。
Since dust is likely to adhere to the objective lens 5 of the optical pickup 4 and the presence or absence of pits cannot be accurately detected when the dust adheres, the tip 6b of the brush 6 provided on the disk body 2 is exposed to light. The objective lens 5 of the pickup 4 is contacted and cleaned.

【0015】このように、ディスク本体2のTOC信号
が設けられるリードイン部3にブラシ6を設け、このブ
ラシ6を弾性体で形成しており、ブラシ6に復元力があ
るため、ディスク本体2の回転によってブラシ6の先端
部6bが光ピックアップ4の対物レンズ5に接触して確
実に清掃することができる。また、ブラシ6は、その根
もと部6aの弾性力を先端部6aより弱く設定してあ
り、ディスク本体2の回転負荷の増加を抑えることがで
きる。
As described above, since the brush 6 is provided in the lead-in portion 3 of the disk body 2 where the TOC signal is provided and the brush 6 is made of an elastic body, and the brush 6 has a restoring force, the disk body 2 is provided. By the rotation of, the tip portion 6b of the brush 6 comes into contact with the objective lens 5 of the optical pickup 4 and can be surely cleaned. Further, the brush 6 is set such that the elastic force of the root portion 6a thereof is set to be weaker than that of the tip portion 6a, so that an increase in the rotational load of the disc body 2 can be suppressed.

【0016】図5は弾性ブラシの他の実施例の正面図で
ある。この実施例のブラシ6は、その先端部6bを凸の
円弧状にして光ピックアップ4の対物レンズ5と確実に
接触して清掃できるようにしている。
FIG. 5 is a front view of another embodiment of the elastic brush. In the brush 6 of this embodiment, the tip portion 6b is formed in a convex arc shape so that the brush 6 can surely come into contact with the objective lens 5 of the optical pickup 4 for cleaning.

【0017】図6は弾性ブラシの他の実施例の正面図で
ある。この実施例のブラシ6は、その根もと部6aに切
欠11を形成して、根もと部6aの弾性力を先端部6a
より弱く設定してあり、さらにその先端部6bを凹の円
弧状にして光ピックアップ4の対物レンズ5とケース1
2との間のゴミまで確実に接触して清掃できるようにし
ている。
FIG. 6 is a front view of another embodiment of the elastic brush. In the brush 6 of this embodiment, the notch 11 is formed in the root portion 6a so that the elastic force of the root portion 6a is applied to the tip portion 6a.
It is set to be weaker, and the tip portion 6b is formed into a concave arc shape and the objective lens 5 of the optical pickup 4 and the case 1
The dust between the two can be contacted and cleaned surely.

【0018】図7は弾性ブラシの他の実施例の正面図で
ある。この実施例のブラシ6は、その根もと部6aの幅
を狭くして、根もと部6aの弾性力を先端部6aより弱
く設定してあり、これによりディスク本体2への取付が
容易である。
FIG. 7 is a front view of another embodiment of the elastic brush. In the brush 6 of this embodiment, the width of the root portion 6a is narrowed so that the elastic force of the root portion 6a is set to be weaker than that of the tip portion 6a, which facilitates attachment to the disc body 2. Is.

【0019】[0019]

【発明の効果】前記したように、請求項1記載の発明
は、ディスク本体のブラシを弾性体で形成したから、ブ
ラシに復元力があるため光ピックアップの対物レンズに
接触して確実に清掃することができる。また、ブラシ
は、その根もと部の弾性力を先端部より弱く設定したか
ら、ディスク本体の回転負荷の増加を抑えることができ
る。
As described above, according to the first aspect of the invention, since the brush of the disk body is formed of the elastic body, the brush has a restoring force, so that the brush comes into contact with the objective lens of the optical pickup to surely clean it. be able to. Further, since the elastic force of the root portion of the brush is set to be weaker than that of the tip portion, it is possible to suppress an increase in the rotational load of the disk body.

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

【図1】光ディスクの平面図である。FIG. 1 is a plan view of an optical disc.

【図2】図1のII−II線に沿う断面図である。FIG. 2 is a sectional view taken along line II-II in FIG.

【図3】図2のIII−III線に沿う断面図である。FIG. 3 is a sectional view taken along the line III-III in FIG.

【図4】光ピックアップの対物レンズの清掃状態を示す
図である。
FIG. 4 is a diagram showing a cleaning state of an objective lens of an optical pickup.

【図5】ブラシの他の実施例の正面図である。FIG. 5 is a front view of another embodiment of the brush.

【図6】ブラシの他の実施例の正面図である。FIG. 6 is a front view of another embodiment of the brush.

【図7】ブラシの他の実施例の正面図である。FIG. 7 is a front view of another embodiment of the brush.

【符号の説明】[Explanation of symbols]

2 ディスク本体 3 リードイン部 4 光ピックアップ 5 対物レンズ 6 ブラシ 6a ブラシ6の根もと部 6b ブラシ6の先端部 2 disk body 3 lead-in section 4 optical pickup 5 objective lens 6 brush 6a root of brush 6 6b tip of brush 6

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 ディスク本体のTOC信号が設けられる
リードイン部に、光ピックアップの対物レンズに接触し
て清掃するブラシを設け、このブラシを弾性体で形成す
ると共に、ブラシの根もと部の弾性力を先端部より弱く
設定したことを特徴とするブラシを備える光ディスク。
1. A brush for contacting and cleaning an objective lens of an optical pickup is provided at a lead-in portion of a disk body where a TOC signal is provided, and the brush is formed of an elastic body and at the base of the brush. An optical disk provided with a brush characterized in that the elastic force is set to be weaker than that of the tip.
JP6017800A 1994-01-18 1994-01-18 Optical disk provided with brush Pending JPH07210891A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6017800A JPH07210891A (en) 1994-01-18 1994-01-18 Optical disk provided with brush

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6017800A JPH07210891A (en) 1994-01-18 1994-01-18 Optical disk provided with brush

Publications (1)

Publication Number Publication Date
JPH07210891A true JPH07210891A (en) 1995-08-11

Family

ID=11953798

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6017800A Pending JPH07210891A (en) 1994-01-18 1994-01-18 Optical disk provided with brush

Country Status (1)

Country Link
JP (1) JPH07210891A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009110116A1 (en) * 2008-03-07 2009-09-11 任天堂株式会社 Lens cleaner

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009110116A1 (en) * 2008-03-07 2009-09-11 任天堂株式会社 Lens cleaner
JP5208197B2 (en) * 2008-03-07 2013-06-12 任天堂株式会社 Lens cleaner
US8910338B2 (en) 2008-03-07 2014-12-16 Nintendo Co., Ltd. Lens cleaner

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