JPH0749672Y2 - Optical disc player - Google Patents
Optical disc playerInfo
- Publication number
- JPH0749672Y2 JPH0749672Y2 JP1988105038U JP10503888U JPH0749672Y2 JP H0749672 Y2 JPH0749672 Y2 JP H0749672Y2 JP 1988105038 U JP1988105038 U JP 1988105038U JP 10503888 U JP10503888 U JP 10503888U JP H0749672 Y2 JPH0749672 Y2 JP H0749672Y2
- Authority
- JP
- Japan
- Prior art keywords
- disc
- objective lens
- collar
- laser beam
- turntable
- 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 - Lifetime
Links
- 230000003287 optical effect Effects 0.000 title claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000013459 approach Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
Description
【考案の詳細な説明】 (イ)産業上の利用分野 本考案は光ディスクのターンテーブル装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an optical disk turntable device.
(ロ)従来の技術 近年、単一のターンテーブル装置にてビデオディスク、
コンパクトディスク、及びビデオ情報付コンパクトディ
スク等、数種のディスクを装着し得るターンテーブル装
置が開発されている(例えばパイオニア株式会社製CLD-
99S)。斯かるターンテーブル装置の構成図を第4図に
示す。(B) Conventional technology In recent years, a video disk,
A turntable device capable of mounting several types of discs such as a compact disc and a compact disc with video information has been developed (for example, CLD- manufactured by Pioneer Corporation.
99S). A block diagram of such a turntable device is shown in FIG.
(1)はスピンドルモータ、(2)はスピンドルモータ
(1)の駆動軸、(3)はこの駆動軸(2)に枢着され
た円柱状の回転部材、(4)は前記駆動軸(2)にピン
(5)により抜止めされて摺動自在に装着された調心部
材、(6)はコンパクトディスク及びビデオ付コンパク
トディスク等、第1のディスク(D1)の中心孔(7)と
係合する第1の係合部、(8)はビデオディスク等、第
2のディスク(図示せず)と係合する第2の係合部、
(9)は調心部材(4)を上方に付勢するバネ、(10)
は回転部材(3)の上面に固着され、且つ周縁に鍔部
(11)を有するディスク支持部材、(12)は鍔部上面に
貼着されたパッド、(13)はディスク上面を押圧してデ
ィスクを前記鍔部(11)上のパッド(12)に圧接するク
ランパ、(14)はディスク面に記録された情報をレーザ
光(15)により光学的に読取るピックアップ、(16)は
前記レーザ光(15)をディスク上に収束させる対物レン
ズである。(1) is a spindle motor, (2) is a drive shaft of the spindle motor (1), (3) is a cylindrical rotating member pivotally attached to the drive shaft (2), and (4) is the drive shaft (2). (6) is the center hole (7) of the first disc (D 1 ) such as a compact disc and a compact disc with a video. A first engaging portion for engaging, (8) a second engaging portion for engaging with a second disc (not shown) such as a video disc,
(9) is a spring that biases the aligning member (4) upward, (10)
Is a disk support member fixed to the upper surface of the rotating member (3) and having a flange (11) on the periphery, (12) is a pad adhered to the upper surface of the flange, and (13) is the disk upper surface pressed. The disc is pressed against the pad (12) on the flange (11), the clamper (14) is a pickup for optically reading the information recorded on the disc surface with a laser beam (15), and (16) is the laser beam. This is an objective lens that focuses (15) on the disc.
ところで、ビデオディスクでは、その中心孔の直径が35
mmであり、従って上記構成において第2の係合部(8)
の径はおおよそ36〜37mm必要となる。更にこの第2の係
合部(8)の外周にディスク載置用の鍔部(11)が必要
であるが、この鍔部(11)の幅は、満足にディスクを載
置しようとすると少なくとも5mm程度必要となり、従っ
て鍔部(11)周縁の径はおおよそ47〜48mm程度となる。
これに対し、コンパクトディスクでは情報がディスク中
心から25mmの所から記録されており、従ってターンテー
ブル装置にコンパクトディスクを装着した場合、鍔部
(11)の周端からわずか数mmのところに情報の記録領域
が位置することになる。此様に鍔部(11)端部と情報の
記録領域とが接近すると、第5図に示す様にレーザ光
(15)の一部が鍔部(11)によって遮光され、良好な読
取動作を達成されないばかりか、フォーカスサーボ及び
トラッキングサーボ動作にも支障をきたす惧れがある。By the way, in a video disc, the diameter of its center hole is 35
mm, and thus the second engagement part (8) in the above configuration
Approximately 36-37mm diameter is required. Further, a disc mounting collar (11) is required on the outer periphery of the second engaging portion (8), and the width of this collar (11) is at least sufficient to mount the disc. About 5 mm is required, and therefore the diameter of the periphery of the collar (11) is about 47 to 48 mm.
On the other hand, in the compact disc, the information is recorded from 25 mm from the center of the disc. Therefore, when the compact disc is mounted on the turntable device, the information is recorded only a few mm from the peripheral edge of the collar (11). The recording area will be located. When the end of the collar (11) and the information recording area approach each other, a part of the laser beam (15) is blocked by the collar (11) as shown in FIG. 5, and a good reading operation is performed. Not only will it not be achieved, but there is also the danger that it will interfere with the focus servo and tracking servo operations.
また、ディスクには射出成形時にリング状の突起(17)
が形成されるが、斯かるリング状の突起(17)が、上記
構成において鍔部(11)のパッド(12)上に位置するた
め、ディスク(D1)はこの突起(17)の高さ分だけ持ち
上げられた形となり、これによりディスク(D1)とピッ
クアップ(14)との距離が増大する。斯様にディスク
(D1)とピックアップ(14)との距離が増大すると、フ
ォーカス制御のため対物レンズ(16)がディスク(D1)
に接近するため、レーザ光(15)のより広がった部分が
鍔部(11)の端縁に位置し、このためレーザ光(15)が
鍔部(11)によって遮光される可能性が大きくなる。In addition, the disk has a ring-shaped protrusion (17) during injection molding.
However, since the ring-shaped protrusion (17) is located on the pad (12) of the collar portion (11) in the above structure, the disc (D 1 ) has the height of this protrusion (17). The shape is lifted by an amount, which increases the distance between the disc (D 1 ) and the pickup (14). When the distance between the disc (D 1 ) and the pickup (14) thus increases, the objective lens (16) moves the disc (D 1 ) for focus control.
Since the laser beam (15) is closer to, the wider part of the laser beam (15) is located at the edge of the collar part (11), which increases the possibility that the laser beam (15) is blocked by the collar part (11). .
(ハ)考案が解決しようとする課題 本考案は、コンパクトディスク等が装着された場合にも
ピックアップからのレーザ光を遮光することのない様な
ターンテーブル装置を提供せんとするものである。(C) Problem to be Solved by the Invention The present invention is to provide a turntable device that does not block the laser light from the pickup even when a compact disc or the like is mounted.
(ニ)課題を解決するための手段 上記課題に鑑み本考案は、鍔部の下面周縁部に切欠部を
設けたことを第1の特徴とする。(D) Means for Solving the Problems In view of the above problems, the present invention has a first feature that a notch is provided in the peripheral edge of the lower surface of the collar.
また、ディスク成形時にディスク表面に生じる突起が間
入する逃げ部を鍔部に形成したことを第2の特徴とす
る。A second feature is that the collar portion is formed with an escape portion into which a protrusion generated on the surface of the disc at the time of molding the disc is inserted.
(ホ)作用 上記第1の構成に依れば、鍔部の切欠部をもレーザ光が
通過し得るので、更に鍔部端縁に接近したディスク部分
へも、遮光されることなくレーザ光を収束させることが
できる。(E) Action According to the first configuration, the laser light can pass through the notch portion of the collar portion, so that the laser light is not shielded even to the disk portion closer to the edge of the collar portion. Can be converged.
また第2の構成に依れば、ディスク面の位置を突起の分
だけ下降せしめることができ、以って鍔部側方でのレー
ザ光の収束径をより小さくすることができるので、この
径の減小分だけ鍔部端部とレーザ光との間に隙間を生じ
させ得る。Further, according to the second configuration, the position of the disk surface can be lowered by the amount of the protrusion, and thus the converged diameter of the laser light on the side of the collar portion can be made smaller. It is possible to create a gap between the end of the collar portion and the laser light by the reduction of
(ヘ)実施例 以下、本考案の一実施例につき図面を用いて説明する。
尚、従来例で用いた第4図と同一部分には同一符号を付
し説明を省略する。(F) Embodiment One embodiment of the present invention will be described below with reference to the drawings.
The same parts as those in FIG. 4 used in the conventional example are designated by the same reference numerals and the description thereof will be omitted.
第1図はターンテーブル装置の分解斜視図である。図示
の如く、支持部材(10)は3つの螺子(18)(18)(1
8)により回転部材(3)上面に螺着される。尚、この
時、支持部材(10)中央部の開口(19)が回転部材
(3)上面の段部(20)に係合することにより、支持部
材(10)はモータ軸(2)に対し調心される。また支持
部材(10)の凹部(21)にはボス(22)……が植立され
ており、互いに対向するボス(22)(22)間に調心部材
(6)の橋部(23)を挟挿することにより、調心部材
(6)が上下方向に案内される。調心部材(6)は斯か
る状態にて更にその中央孔(24)がモータ軸(2)に嵌
挿され、然る後モータ軸(2)に形成された溝(25)に
ピン(5)を嵌合させることにより、抜け止めされる。
更に、支持部材(10)には鍔部(11)の内周部に段部
(26)が形成されていると共に下面周縁部には傾斜部
(27)が形成されている。尚、上記構成において、支持
部材(10)は打ち抜き加工により形成されており、この
ため品質が安定すると共にコストの低減が図れる。FIG. 1 is an exploded perspective view of the turntable device. As shown, the support member (10) has three screws (18) (18) (1
It is screwed onto the upper surface of the rotating member (3) by 8). At this time, the opening (19) in the central portion of the support member (10) engages with the step (20) on the upper surface of the rotating member (3), so that the support member (10) with respect to the motor shaft (2). Be aligned. Further, bosses (22) are planted in the recesses (21) of the support member (10), and the bridge portion (23) of the aligning member (6) is provided between the bosses (22) (22) facing each other. The centering member (6) is guided in the up-and-down direction by sandwiching. In such a state, the centering member (6) further has the central hole (24) fitted into the motor shaft (2), and then the pin (5) is inserted into the groove (25) formed in the motor shaft (2). ) Is fitted to prevent it from coming off.
Further, the support member (10) has a stepped portion (26) formed on the inner peripheral portion of the flange portion (11) and an inclined portion (27) formed on the peripheral edge portion of the lower surface. In the above structure, the support member (10) is formed by punching, so that the quality is stable and the cost can be reduced.
第2図は斯かるピックアップ装置にコンパクトディスク
(ディスク(D1))を装着した際の要部断面図である。
図示の如く、レーザ光(15)の遮光は傾斜部(27)を形
成することにより退避することができ、更にディスク
(D1)面の突起(17)が段部(26)にはまり込むことに
より、ディスク(D1)はパッド(12)上に圧着される。
これにより、ディスク(D1)は突起(17)の高さ分だけ
ピックアップ(14)に接近し、レーザ光(15)の収束点
がPからP′に変更されるため、図示の如く鍔部(11)
とレーザ光(15)との間に隙間が生じる。従ってレーザ
光(15)の遮光の退避がより確実になされる。FIG. 2 is a sectional view of an essential part when a compact disc (disc (D 1 )) is mounted on such a pickup device.
As shown in the figure, the shielding of the laser light (15) can be retracted by forming an inclined portion (27), and the projection (17) on the disc (D 1 ) surface should be fitted into the stepped portion (26). The disc (D 1 ) is thereby crimped onto the pad (12).
As a result, the disc (D 1 ) approaches the pickup (14) by the height of the protrusion (17), and the convergence point of the laser light (15) is changed from P to P ′. (11)
And a laser beam (15) form a gap. Therefore, the shielding of the laser beam (15) is more reliably retracted.
第3図に本考案の他の実施例を示す。同図(a)は鍔部
(11)の幅をやや大きめにし、段部(26′)をディスク
(D1)の突起(17)に応じて中央部よりに形成した例で
ある。斯かる構成によれば、ディスクの鍔部(11)に対
する圧接面積が大きいため、ディスクの装着状態が良好
となる。また同図(b)は段部(26)の代わりに傾斜部
(28)を設けた例、同図(c)は上記(b)図の傾斜部
(27)(28)をR部(27′)(28′)とした例である。
更に同図(d)は鍔部(11)の上・下面に夫々段部(2
9)(30)を配し、上面の段部(29)をパッド(12′)
にて覆う構成としたものである。斯かる構成において、
ディスク(D1)が装着された場合には、ディスク(D1)
の突起(18)がパッド(12′)を押圧して撓ませるた
め、ディスク(D1)はパッド(12′)に面接触して圧接
される。尚、斯かる(b)図〜(d)図に示す構成にお
いても、第1図に示す実施例と同様の効果が得られる。FIG. 3 shows another embodiment of the present invention. FIG (a) is a slightly larger width of the flange (11), is an example of forming closer to the center portion in accordance with a projection (17) of the stepped portion (26 ') disk (D 1). According to such a configuration, since the pressure contact area of the disc with respect to the flange portion (11) is large, the disc can be mounted well. Further, FIG. 7B shows an example in which an inclined portion 28 is provided instead of the step portion 26, and FIG. 8C shows the inclined portion 27, 28 in FIG. ′) (28 ′)
Further, FIG. 3 (d) shows steps (2) on the top and bottom of the collar (11), respectively.
9) (30) are arranged, and the step (29) on the upper surface is pad (12 ')
It is configured to be covered with. In such a configuration,
If the disc (D 1 ) is installed, the disc (D 1 )
'To deflect by pressing the disk (D 1) is a pad (12 projections (18) of the pad (12)' is pressed in surface contact with). It should be noted that the same effects as those of the embodiment shown in FIG. 1 can be obtained with the configurations shown in FIGS.
(ト)考案の効果 以上、本考案に依れば、ターンテーブル装置のディスク
載置用の鍔部の側近位置にディスクの情報記録領域が位
置しても、当該位置の読取に際してピックアップからの
レーザ光が鍔部によって遮光されることはなく、以って
良好なディスクの再生動作を実現することができる。(G) Effect of the Invention As described above, according to the present invention, even if the information recording area of the disk is located near the side of the disk mounting brim of the turntable device, the laser from the pickup is read at that position. Light is not blocked by the collar portion, and thus a good disc reproducing operation can be realized.
第1図は本考案の一実施例を示す分解斜視図、第2図は
同実施例を示す要部側断面図、第3図(a)(b)
(c)(d)は他の実施例を示す要部側断面図、第4図
は従来例を示す側断面図、第5図は同じく従来例を示す
要部側断面図である。 (6)及び(8)は第1及び第2の係合部(係合部)、
(11)は鍔部、(17)は突起、(26)(26′)及び(2
9)、(28)、(28′)は夫々逃げ部となる段部、傾斜
部、R部、(27)(27′)及び(30)は切欠部となる傾
斜部、R部、及び段部である。FIG. 1 is an exploded perspective view showing an embodiment of the present invention, FIG. 2 is a side sectional view of an essential part showing the embodiment, and FIGS. 3 (a) and 3 (b).
(C) and (d) are cross-sectional views of the main part of another embodiment, FIG. 4 is a cross-sectional view of the conventional example, and FIG. 5 is a cross-sectional view of the main part of the conventional example. (6) and (8) are first and second engaging portions (engaging portions),
(11) is a collar part, (17) is a protrusion, (26) (26 ') and (2
9), (28) and (28 ') are stepped portions which are relief portions, inclined portions and R portions respectively, and (27), (27') and (30) are inclined portions which are cutout portions, R portions and stepped portions. It is a department.
Claims (1)
係合部の外側に配設されたディスク載置用の鍔部とを有
するターンテーブルと、 対物レンズを有し、該対物レンズを経たレーザ光を該鍔
部上に載置されたディスクに照射して信号の読み取りを
為し、前記ターンテーブルに接近した時に前記対物レン
ズの一部が前記鍔部の下側に位置するピックアップを備
えた光ディスクプレーヤにおいて、 前記ピックアップが前記ターンテーブルに接近して前記
対物レンズの一部が前記鍔部の下側に位置した時に、前
記対物レンズから前記ディスクに照射されるレーザ光の
通過を許容するように、前記鍔部の下面周縁部に切欠部
を設けたことを特徴とする光ディスクプレーヤ。1. A turntable having an engaging portion that engages with a center hole of a disc, and a flange for placing the disc disposed outside the engaging portion; and an objective lens, A laser beam passing through the objective lens is irradiated onto a disc mounted on the collar portion to read a signal, and when the turntable is approached, a part of the objective lens is positioned below the collar portion. In the optical disc player equipped with a pickup, the laser beam emitted from the objective lens to the disc when the pickup approaches the turntable and a part of the objective lens is located below the collar portion. An optical disk player, characterized in that a notch is provided in a peripheral portion of a lower surface of the flange so as to allow passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988105038U JPH0749672Y2 (en) | 1988-08-09 | 1988-08-09 | Optical disc player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988105038U JPH0749672Y2 (en) | 1988-08-09 | 1988-08-09 | Optical disc player |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0230188U JPH0230188U (en) | 1990-02-26 |
| JPH0749672Y2 true JPH0749672Y2 (en) | 1995-11-13 |
Family
ID=31337298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988105038U Expired - Lifetime JPH0749672Y2 (en) | 1988-08-09 | 1988-08-09 | Optical disc player |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0749672Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6224466A (en) * | 1985-07-23 | 1987-02-02 | Pioneer Electronic Corp | Disc player |
| JPH0624024Y2 (en) * | 1987-02-25 | 1994-06-22 | パイオニア株式会社 | Information recording disk clamping device |
-
1988
- 1988-08-09 JP JP1988105038U patent/JPH0749672Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0230188U (en) | 1990-02-26 |
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