JP3691354B2 - Disc recording or reproducing apparatus having a pickup tilt adjusting mechanism and method for positioning the adjusting mechanism - Google Patents

Disc recording or reproducing apparatus having a pickup tilt adjusting mechanism and method for positioning the adjusting mechanism Download PDF

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Publication number
JP3691354B2
JP3691354B2 JP2000170239A JP2000170239A JP3691354B2 JP 3691354 B2 JP3691354 B2 JP 3691354B2 JP 2000170239 A JP2000170239 A JP 2000170239A JP 2000170239 A JP2000170239 A JP 2000170239A JP 3691354 B2 JP3691354 B2 JP 3691354B2
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chassis
bracket
screw
guide shaft
pickup
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JP2001351250A (en
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光彦 前田
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Sanyo Electric Co Ltd
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Sanyo Electric Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、ディスクの信号面に対してピックアップを傾ける傾き調整機構を具えたディスク記録又は再生装置に関する。
【0002】
【従来の技術】
図7は、従来のディスク記録又は再生装置の斜視図である。シャーシ(1)上には、周知の如くディスク(7)が載置されるターンテーブル(13)と、該ターンテーブル(13)に接近離間可能に設けられたピックアップ(2)を具える。ピックアップ(2)は上面に対物レンズ(22)を具え、シャーシ(1)上の2本のガイド軸(4)(4)に移動を案内される。各ガイド軸(4)の両端部は、シャーシ(1)上のブラケット(9)(9)に嵌まる。
シャーシ(1)上の側部には、モータ(M)が設けられ、該モータ(M)は歯車機構(21)を介して、ピックアップ(2)の側部に設けられたラック(20)に連繋する。モータ(M)に通電すると、歯車機構(21)の各ギアが回転し、ピックアップ(2)が移動する。
【0003】
図8は、ディスク(7)の裏面図である。ディスク(7)の信号面には、円周方向に沿って複数のピット(73)(73)が凹設され、該ピット(73)にレーザー光を当てたときと、ピット(73)以外の箇所にレーザー光を当てたときとでは反射光の強さが異なる。これにより、0と1からなるデジタル信号を再生する。
近年、ディスク(7)には信号が高密度記録されるものがある。該ディスクでは図8に示すディスク半径方向のピット(73)(73)の間隔Hが狭い。
この為、レーザー光の光軸がディスク(7)の信号面に対して僅かに傾いた場合、誤った位置のピット(73)を照射し、信号を正しく再生できない虞れがある。
そこで、シャーシ(1)上にピックアップ(2)の傾きを調整する機構を設け、ディスク記録又は再生装置を製造する工程に於いて、ピックアップ(2)の傾きを微調整し、高密度記録されたディスクをスムーズに再生することが提案されている。
【0004】
図9は、調整機構(5)の側面断面図である。シャーシ(1)にはガイド軸(4)の一端部が嵌まる凹部(90)が設けられたブラケット(9)が載置され、該ブラケット(9)はシャーシ(1)に螺合する止めビス(30)により取り付けられる。
凹部(90)内には、ガイド軸(4)を上向きに付勢する圧縮バネ(50)が設けられ、ブラケット(9)には、圧縮バネ(50)に抗してガイド軸(4)を押し込む調整ネジ(6)が螺合している。調整ネジ(6)を回すと、ガイド軸(4)の端部が昇降するから、ガイド軸(4)は、ピックアップ(2)の移動方向を含みシャーシ(1)に直交する面内にて傾く。これにより、ピックアップ(2)の傾きを微調整できる。
【0005】
【発明が解決しようとする課題】
従来にあっては、ブラケット(9)をシャーシ(1)にビス(30)止めする際に、ブラケット(9)がシャーシ(1)に平行な面内、即ち水平面内にて振れ移動する虞れがある。これでは、ピックアップ(2)の傾きは正確に調整できても、ガイド軸(4)が水平面内にて振れ移動する虞れがあり、ピックアップ(2)がディスク中心に向かって正確に移動できない。
また、ガイド軸(4)は凹部(90)に嵌まっており、凹部(90)とガイド軸(4)との間には側方に僅かな隙間がある。従って、調整ネジ(6)がガイド軸(4)を正確に下方に押し込まないと、ガイド軸(4)が該隙間内にて振れ移動する虞れがある。本発明の目的は、ピックアップの傾き調整機構をシャーシ上に正確に位置決めし、且つガイド軸がシャーシに略平行な面内にて不用意に振れ移動することを防ぐことにある。
【0006】
【課題を解決する為の手段】
ピックアップ(2)の移動方向を含みシャーシ(1)上面に直交した面内にてガイド軸(4)の傾き角度を変える調整機構(5)は、シャーシ(1)上にてブラケット(9)の位置を定める第1の位置決め機構(3)と、シャーシ(1)面に略平行な面内にて調整ネジ(6)の位置を定め、調整ネジ(6)の進行方向をガイド軸(4)の中心Cに正確に向ける第2の位置決め機構(8)を具え、
第1の位置決め機構 ( ) は、ブラケット ( ) に設けられた舌片 (91) をシャーシ ( ) に開設された透孔 (10) に嵌めて構成され、ブラケット ( ) は舌片 (91) を透孔 (10) のビス (30) 回転側の端縁 (11) に当接させて位置決めされ、
第2の位置決め機構 ( ) は、調整ネジ ( ) が螺合しブラケット ( ) にビス (85) 止めされる受け板 (80) と、ブラケット ( ) 上の位置決め突起 (92) を具え、受け板 (80) はビス (85) 回転側の切欠き (81) を位置決め突起 (92) に当接させて位置決めされる。
【0007】
【作用及び効果】
第1の位置決め機構(3)によりブラケット(9)はシャーシ(1)上の正確な位置に取り付けられるから、ガイド軸(4)がシャーシ(1)に平行な面内にて振れ移動する虞れはない。
また、第2の位置決め機構(8)により、調整ネジ(6)はその進行方向がガイド軸(4)の中心Cを向く。これにより、ガイド軸(4)がシャーシ(1)に略平行な面内にて不用意に振れ移動することは防止される。
【0008】
【発明の実施の形態】
以下、本発明の一例を図を用いて詳述する。
図1は、ディスク記録又は再生装置の平面図である。本願にあっては、ガイド軸(4)の傾き調整機構(5)を位置決めする点に特徴がある。
従来と同様に、シャーシ(1)に開設された開口(14)の側方には、ディスク(7)を回転させるターンテーブル(13)が設けられ、ディスク(7)にビームを発射する対物レンズ(22)を具えたピックアップ(2)がターンテーブル(13)に接近離間可能に配備されている。
ピックアップ(2)は、両端部をブラケット(9)(9)に支持されたガイド軸(4)(4)に嵌まって、レンズ(22)とターンテーブル(13)の夫々の中心を結ぶ仮想線L上を本来移動する。
シャーシ(1)上にて開口(14)の側方には、モータ(17)が設けられ、該モータ(17)は中間ギア(15)を介してピックアップ(2)に連繋する。モータ(17)に通電すると、ピックアップ(2)が移動する。
シャーシ(1)の外周縁は上向きに折曲されて立壁(12)(12)を構成し、該立壁(12)がシャーシ(1)の外方に配備されるキャビネット(図示せず)に取り付けられる。
【0009】
図2は、ブラケット(9)を図1のA方向から見た側面断面図である。ブラケット(9)はシャーシ(1)の下方から螺合する止めビス(30)によりシャーシ(1)に取り付けられる。ブラケット(9)にはガイド軸(4)の端部が嵌まる凹部(90)が設けられ、該凹部(90)内にはガイド軸(4)の上向きに付勢する圧縮バネ(50)が配備されている。
ブラケット(9)の天面には、受け板(80)が被さり、該受け板(80)は板止めビス(85)によりブラケット(9)に取り付けられる。該受け板(80)には調整ネジ(6)が螺合し、該調整ネジ(6)の下端がガイド軸(4)の上端に接する。調整ネジ(6)の進行方向は、本来ガイド軸(4)の中心Cを通る。
【0010】
図3は、ブラケット(9)、ガイド軸(4)、受け板(80)の分解斜視図であり、シャーシ(1)を一部破断している。シャーシ(1)には、ブラケット(9)の一部が嵌まる透孔(10)が開設されており、ブラケット(9)からは透孔(10)に嵌まる舌片(91)が突出している。舌片(91)は上面がシャーシ(1)上面と同一面内に位置する、即ち、舌片(91)はガイド軸(4)よりも下方に配備される。舌片(91)は円弧状に形成されて、透孔(10)の端縁(11)に接することによりブラケット(9)のシャーシ(1)面に於ける水平位置が決定される。
【0011】
凹部(90)は、ガイド軸(4)が僅かに余裕を持って嵌まる幅に形成された案内部(93)と、圧縮バネ(50)が嵌まり案内部(93)よりも膨らんで形成された収納部(94)を連ねて設けている。ブラケット(9)の上面には、受け板(80)に嵌まる位置決め突起(92)(92a)が突出し、該位置決め突起(92)(92a)の側方には、板止めビス(85)が螺合するネジ孔(82)が設けられている。
受け板(80)には、位置決め突起(92)(92a)に嵌まる切欠き(81)(81)が開設され、受け板(80)上にて切欠き(81)(81)の両側には、調整ネジ(6)が螺合するビス孔(82)及び板止めビス(85)が通る貫通孔(83)が開設されている。
【0012】
ブラケットの取付け
(第1の位置決め機構)
ブラケット(9)をシャーシ(1)に取り付けるには、以下の手順にて行なう。
図4は、シャーシ(1)の裏面図である。先ず、シャーシ(1)を裏返して、ブラケット(9)をシャーシ(1)の下方から透孔(10)に挿入する。舌片(91)が透孔(10)に嵌まった状態にて、ブラケット(9)を治具(98)にて固定し、ブラケット(9)の水平面内に於ける回転を規制する。
止めビス(30)をシャーシ(1)を通って、ブラケット(9)に螺合させる。止めビス(30)は締め付けに伴って時計方向に回転するから、止めビス(30)の頭部がシャーシ(1)に接すると、シャーシ(1)が止めビス(30)の頭部との摩擦により、時計方向に回転する。透孔(10)の端縁(11)が舌片(91)に接し、これによりブラケット(9)はシャーシ(1)上にて位置決めされる。舌片(91)は円弧状に形成されているから、舌片(91)は必ず端縁(11)上の1点にて当接し、位置決めされる。即ち、ブラケット(9)の舌片(91)と端縁(11)とによって第1の位置決め機構(3)を構成する。ブラケット(9)を止めビス(30)にて締結するのと同時に、ブラケット(9)のシャーシ(1)上の位置が決定されるので、位置決めの手間が省ける。
【0013】
(第2の位置決め機構)
次に、図3に示すように、シャーシ(1)を上下反転し、圧縮バネ(50)及びガイド軸(4)が挿入されたブラケット(9)に受け板(80)を被せ、貫通孔(83)を通って板止めビス(85)をブラケット(9)のビス孔(82)に螺合させる。板止めビス(85)は締め付けに伴って時計方向に回転し、板止めビス(85)の頭部が受け板(80)に接すると、受け板(80)が板止めビス(85)の頭部との摩擦により、時計方向に回転する。
図5は、受け板(80)の平面図であるが、受け板(80)の時計方向側の切欠き(81)が位置決め突起(92)に接し、これにより受け板(80)はシャーシ(1)面に平行な面内にて位置決めされる。即ち、位置決め突起(92)と受け板(80)の切欠き(81)によって、第2の位置決め機構(8)を構成する。受け板(80)を板止めビス(85)によって締結するのと同時に、受け板(80)のシャーシ(1)に略平行な面内に於ける位置が決定されるので、位置決めの手間が省ける。
ブラケット(9)を取り付けた後に、調整ネジ(6)を回転させると、ガイド軸(4)はピックアップ(2)の移動方向を含みシャーシ(1)に直交する面内にて傾き調整される。
【0014】
図6は、図3をC−C線を含む面内にて破断した断面図である。受け板(80)をシャーシ(1)面に平行な面内にて位置決めすることにより、調整ネジ(6)の進行方向はガイド軸(4)の中心Cを向く。
仮に、受け板(80)がシャーシ(1)面に平行な面内にて正確に位置決めされないと、図6に一点鎖線で示すように、調整ネジ(6)の進行方向がガイド軸(4)の中心Cから外れる。前記の如く、凹部(90)の案内部(93)とガイド軸(4)との間には僅かな隙間があるが、調整ネジ(6)の進行方向がガイド軸(4)の中心Cからズレると、調整ネジ(6)はガイド軸(4)の偏心箇所を押すから、ガイド軸(4)が該隙間内で、ガイド軸(4)に沿う方向に直交して横振れする。
ピックアップ(2)はガイド軸(4)に沿って移動するから、これでは、ピックアップ(2)の移行路は、図1に示すようにディスク中心を向いた仮想線Lからズレる。従って、調整ネジ(6)の進行方向をガイド軸(4)の中心Cに正確に向け、ガイド軸(4)が案内部(93)内にてガイド軸(4)に沿う方向に直交して横振れすることを規制している。
【0015】
斯種装置は小型化が所望されており、特にディスク外周部側のブラケット(9)の近傍にはシャーシ(1)の立壁(12)が立設している。ブラケット(9)を位置決めするには、ブラケット(9)をガイド軸(4)に沿う方向に長くすればよいが、装置の小型化に反するので、上記の如く第1の位置決め機構(3)を設けている。これにより、装置の小型化を達成している。
また、第1の位置決め機構(3)を構成する舌片(91)の上面がシャーシ(1)上面と同一面内に位置することにより、舌片(91)はピックアップ(2)の移行路よりも下方に配備される。これにより、第1の位置決め機構(3)を設けても、装置全体が厚くならない。
本例にあっては、圧縮バネ(50)によりガイド軸(4)を上向きに付勢し、調整ネジ(6)にてガイド軸(4)を下向きに押すとしている。これに代えて、圧縮バネ(50)によりガイド軸(4)を下向きに付勢し、調整ネジ(6)をシャーシ(1)の下方から螺合させて、該調整ネジ(6)にてガイド軸(4)を上向きに押してもよい。
【0016】
上記実施例の説明は、本発明を説明するためのものであって、特許請求の範囲に記載の発明を限定し、或は範囲を減縮する様に解すべきではない。又、本発明の各部構成は上記実施例に限らず、特許請求の範囲に記載の技術的範囲内で種々の変形が可能であることは勿論である。
【図面の簡単な説明】
【図1】ディスク記録又は再生装置の平面図である。
【図2】ブラケットを図1のA方向から見た側面断面図である。
【図3】ブラケット、ガイド軸、受け板の分解斜視図である。
【図4】シャーシの裏面図である。
【図5】受け板の平面図である。
【図6】図3をC−C線を含む面内にて破断した断面図である。
【図7】従来のディスク記録又は再生装置の斜視図である。
【図8】ディスクの裏面図である。
【図9】調整機構の側面断面図である。
【符号の説明】
(1) シャーシ
(2) ピックアップ
(3) 第1の位置決め機構
(4) ガイド軸
(5) 調整機構
(6) 調整ネジ
(7) ディスク
(8) 第2の位置決め機構
(9) ブラケット
(10) 透孔
(11) 端縁
(80) 受け板
(92) 位置決め突起
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk recording or reproducing apparatus provided with a tilt adjusting mechanism for tilting a pickup with respect to a signal surface of a disk.
[0002]
[Prior art]
FIG. 7 is a perspective view of a conventional disk recording or reproducing apparatus. On the chassis (1), as is well known, a turntable (13) on which a disk (7) is placed and a pickup (2) provided so as to be close to and away from the turntable (13) are provided. The pickup (2) has an objective lens (22) on the upper surface and is guided to move by two guide shafts (4) and (4) on the chassis (1). Both end portions of each guide shaft (4) fit into brackets (9) and (9) on the chassis (1).
A motor (M) is provided on the side of the chassis (1), and the motor (M) is connected to a rack (20) provided on the side of the pickup (2) via a gear mechanism (21). Connect. When the motor (M) is energized, each gear of the gear mechanism (21) rotates and the pickup (2) moves.
[0003]
FIG. 8 is a rear view of the disk (7). A plurality of pits (73) and (73) are recessed along the circumferential direction on the signal surface of the disc (7), and when the laser beam is applied to the pit (73) and other than the pit (73) The intensity of the reflected light is different from when the laser beam is applied to the spot. As a result, a digital signal composed of 0 and 1 is reproduced.
In recent years, some discs (7) record signals at high density. In the disc, the interval H between the pits 73 and 73 in the disc radial direction shown in FIG. 8 is narrow.
For this reason, when the optical axis of the laser beam is slightly inclined with respect to the signal surface of the disk (7), there is a possibility that the pit (73) at the wrong position is irradiated and the signal cannot be reproduced correctly.
Therefore, a mechanism for adjusting the inclination of the pickup (2) is provided on the chassis (1), and the inclination of the pickup (2) is finely adjusted and recorded at a high density in the process of manufacturing the disk recording or reproducing apparatus. It has been proposed to play a disc smoothly.
[0004]
FIG. 9 is a side sectional view of the adjustment mechanism (5). A bracket (9) having a recess (90) in which one end of the guide shaft (4) is fitted is placed on the chassis (1), and the bracket (9) is screwed into the chassis (1). (30) is attached.
A compression spring (50) for urging the guide shaft (4) upward is provided in the recess (90), and the guide shaft (4) is mounted on the bracket (9) against the compression spring (50). The adjusting screw (6) to be pushed is screwed. When the adjusting screw (6) is turned, the end of the guide shaft (4) is raised and lowered, so that the guide shaft (4) is tilted in a plane perpendicular to the chassis (1) including the moving direction of the pickup (2). . Thereby, the inclination of the pickup (2) can be finely adjusted.
[0005]
[Problems to be solved by the invention]
Conventionally, when the bracket (9) is screwed (30) to the chassis (1), the bracket (9) may swing and move in a plane parallel to the chassis (1), that is, in a horizontal plane. There is. In this case, even if the inclination of the pickup (2) can be adjusted accurately, the guide shaft (4) may swing in the horizontal plane, and the pickup (2) cannot move accurately toward the center of the disk.
Further, the guide shaft (4) is fitted in the recess (90), and there is a slight gap on the side between the recess (90) and the guide shaft (4). Therefore, if the adjusting screw (6) does not accurately push the guide shaft (4) downward, the guide shaft (4) may swing and move in the gap. An object of the present invention is to accurately position a pickup tilt adjusting mechanism on a chassis and prevent a guide shaft from swinging and moving inadvertently in a plane substantially parallel to the chassis.
[0006]
[Means for solving the problems]
The adjusting mechanism (5) for changing the inclination angle of the guide shaft (4) in a plane perpendicular to the upper surface of the chassis (1) including the moving direction of the pickup (2) is provided on the chassis (1). The position of the adjusting screw (6) is determined in a first positioning mechanism (3) for determining the position and a plane substantially parallel to the surface of the chassis (1), and the traveling direction of the adjusting screw (6) is determined by the guide shaft (4) A second positioning mechanism (8) that is directed accurately to the center C of the
The first positioning mechanism (3) is constructed to fit tongue provided on the bracket (9) and (91) to the chassis (1) to be opened a hole (10), the bracket (9) is tongue (91) is positioned in contact with the end (11) of the through hole (10) on the screw (30) rotation side ,
The second positioning mechanism (8) is receiving plate adjustment screw (6) is bis (85) to the screwed bracket (9) is stopped and (80), the positioning projection on the bracket (9) (92) The receiving plate (80) is positioned by bringing the notch (81) on the rotating side of the screw (85 ) into contact with the positioning projection (92) .
[0007]
[Action and effect]
Since the bracket (9) is attached to the exact position on the chassis (1) by the first positioning mechanism (3), the guide shaft (4) may swing and move in a plane parallel to the chassis (1). There is no.
The second positioning mechanism (8) causes the adjustment screw (6) to travel in the direction C toward the center C of the guide shaft (4). As a result, the guide shaft (4) is prevented from inadvertently swinging and moving in a plane substantially parallel to the chassis (1).
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view of a disk recording or reproducing apparatus. The present application is characterized in that the tilt adjusting mechanism (5) of the guide shaft (4) is positioned.
As in the prior art, a turntable (13) for rotating the disk (7) is provided on the side of the opening (14) opened in the chassis (1), and an objective lens for emitting a beam to the disk (7). A pickup (2) having (22) is arranged on the turntable (13) so as to be able to approach and separate.
The pickup (2) is fitted to guide shafts (4) and (4) supported by brackets (9) and (9) at both ends, and the virtual connection between the centers of the lens (22) and the turntable (13) is made. Originally moves on the line L.
A motor (17) is provided on the side of the opening (14) on the chassis (1), and the motor (17) is connected to the pickup (2) via an intermediate gear (15). When the motor (17) is energized, the pickup (2) moves.
The outer peripheral edge of the chassis (1) is bent upward to form a standing wall (12) (12), and the standing wall (12) is attached to a cabinet (not shown) arranged outside the chassis (1). It is done.
[0009]
FIG. 2 is a side cross-sectional view of the bracket 9 as viewed from the direction A in FIG. The bracket (9) is attached to the chassis (1) by a retaining screw (30) screwed from below the chassis (1). The bracket (9) is provided with a recess (90) into which the end of the guide shaft (4) is fitted, and a compression spring (50) for biasing the guide shaft (4) upward is provided in the recess (90). Has been deployed.
The top surface of the bracket (9) is covered with a receiving plate (80), and the receiving plate (80) is attached to the bracket (9) with a plate fixing screw (85). An adjusting screw (6) is screwed onto the receiving plate (80), and the lower end of the adjusting screw (6) is in contact with the upper end of the guide shaft (4). The traveling direction of the adjusting screw (6) originally passes through the center C of the guide shaft (4).
[0010]
FIG. 3 is an exploded perspective view of the bracket (9), the guide shaft (4), and the receiving plate (80), with the chassis (1) partially broken. The chassis (1) has a through hole (10) into which a part of the bracket (9) is fitted, and a tongue piece (91) fitted into the through hole (10) protrudes from the bracket (9). Yes. The upper surface of the tongue piece (91) is flush with the upper surface of the chassis (1), that is, the tongue piece (91) is arranged below the guide shaft (4). The tongue piece (91) is formed in an arc shape, and the horizontal position of the bracket (9) on the surface of the chassis (1) is determined by contacting the end edge (11) of the through hole (10).
[0011]
The recess (90) is formed by a guide portion (93) formed to have a width that allows the guide shaft (4) to be fitted with a slight margin, and a compression spring (50) that is fitted and swelled from the guide portion (93). The storage section (94) is provided in a row. On the upper surface of the bracket (9), positioning protrusions (92) and (92a) that fit into the receiving plate (80) protrude, and on the side of the positioning protrusions (92) and (92a), plate fixing screws (85) are provided. A screw hole (82) to be screwed is provided.
The receiving plate (80) has notches (81) and (81) that fit into the positioning protrusions (92) and (92a), and is formed on both sides of the notches (81) and (81) on the receiving plate (80). Are provided with a screw hole (82) into which the adjusting screw (6) is screwed and a through hole (83) through which the plate fixing screw (85) passes.
[0012]
Bracket installation
(First positioning mechanism)
To attach the bracket (9) to the chassis (1), the following procedure is used.
FIG. 4 is a rear view of the chassis (1). First, the chassis (1) is turned over and the bracket (9) is inserted into the through hole (10) from below the chassis (1). With the tongue piece (91) fitted in the through hole (10), the bracket (9) is fixed by the jig (98), and the rotation of the bracket (9) in the horizontal plane is restricted.
The retaining screw (30) is screwed into the bracket (9) through the chassis (1). Since the set screw (30) rotates clockwise as it is tightened, if the head of the set screw (30) contacts the chassis (1), the chassis (1) will rub against the head of the set screw (30). To rotate clockwise. The end edge (11) of the through hole (10) contacts the tongue piece (91), whereby the bracket (9) is positioned on the chassis (1). Since the tongue piece (91) is formed in an arc shape, the tongue piece (91) always comes into contact with one point on the edge (11) and is positioned. That is, the first positioning mechanism (3) is constituted by the tongue piece (91) and the end edge (11) of the bracket (9). Since the position of the bracket (9) on the chassis (1) is determined at the same time when the bracket (9) is fastened by the set screw (30), the labor of positioning can be saved.
[0013]
(Second positioning mechanism)
Next, as shown in FIG. 3, the chassis (1) is turned upside down and the receiving plate (80) is put on the bracket (9) into which the compression spring (50) and the guide shaft (4) are inserted, and the through hole ( 83) Screw the plate fixing screw (85) into the screw hole (82) of the bracket (9). The plate-retaining screw (85) rotates clockwise as it is tightened.When the head of the plate-retaining screw (85) comes into contact with the receiving plate (80), the receiving plate (80) is moved to the head of the plate-retaining screw (85) Rotates clockwise due to friction with the part.
FIG. 5 is a plan view of the backing plate (80). A notch (81) in the clockwise direction of the backing plate (80) is in contact with the positioning projection (92), so that the backing plate (80) is a chassis ( 1) Positioning is performed in a plane parallel to the surface. That is, the second positioning mechanism (8) is constituted by the positioning protrusion (92) and the notch (81) of the receiving plate (80). At the same time that the backing plate (80) is fastened by the plate fixing screw (85), the position of the backing plate (80) in a plane substantially parallel to the chassis (1) is determined, so that the time and effort of positioning can be saved. .
When the adjusting screw (6) is rotated after the bracket (9) is attached, the guide shaft (4) is tilt-adjusted in a plane perpendicular to the chassis (1) including the moving direction of the pickup (2).
[0014]
6 is a cross-sectional view of FIG. 3 taken along the plane including the line CC. By positioning the backing plate (80) in a plane parallel to the surface of the chassis (1), the advancing direction of the adjusting screw (6) faces the center C of the guide shaft (4).
If the backing plate (80) is not accurately positioned in a plane parallel to the surface of the chassis (1), the direction of travel of the adjusting screw (6) is as shown by a one-dot chain line in FIG. Deviate from the center C. As described above, there is a slight gap between the guide portion (93) of the recess (90) and the guide shaft (4), but the traveling direction of the adjusting screw (6) is from the center C of the guide shaft (4). When shifted, the adjusting screw (6) pushes the eccentric portion of the guide shaft (4), so that the guide shaft (4) swings in the gap perpendicular to the direction along the guide shaft (4).
Since the pickup (2) moves along the guide shaft (4), the transition path of the pickup (2) deviates from the virtual line L facing the center of the disk as shown in FIG. Accordingly, the traveling direction of the adjusting screw (6) is accurately directed to the center C of the guide shaft (4), and the guide shaft (4) is orthogonal to the direction along the guide shaft (4) in the guide portion (93). Regulates sideways swinging.
[0015]
Such a device is desired to be miniaturized, and in particular, an upright wall (12) of the chassis (1) is erected in the vicinity of the bracket (9) on the disk outer peripheral side. In order to position the bracket (9), the bracket (9) may be elongated in the direction along the guide shaft (4). However, this is contrary to the downsizing of the apparatus, so that the first positioning mechanism (3) is installed as described above. Provided. This achieves miniaturization of the device.
Further, since the upper surface of the tongue piece (91) constituting the first positioning mechanism (3) is located in the same plane as the upper surface of the chassis (1), the tongue piece (91) is moved from the transition path of the pickup (2). Is also deployed below. Thereby, even if the first positioning mechanism (3) is provided, the entire apparatus does not become thick.
In this example, the guide shaft (4) is urged upward by the compression spring (50), and the guide shaft (4) is pushed downward by the adjustment screw (6). Instead, the guide shaft (4) is urged downward by the compression spring (50), the adjustment screw (6) is screwed from below the chassis (1), and the guide is guided by the adjustment screw (6). The shaft (4) may be pushed upward.
[0016]
The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. In addition, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.
[Brief description of the drawings]
FIG. 1 is a plan view of a disc recording or reproducing apparatus.
FIG. 2 is a side cross-sectional view of the bracket as viewed from the direction A in FIG.
FIG. 3 is an exploded perspective view of a bracket, a guide shaft, and a receiving plate.
FIG. 4 is a rear view of the chassis.
FIG. 5 is a plan view of a receiving plate.
6 is a cross-sectional view of FIG. 3 taken along the plane including the line CC.
FIG. 7 is a perspective view of a conventional disk recording or reproducing device.
FIG. 8 is a rear view of the disc.
FIG. 9 is a side sectional view of the adjustment mechanism.
[Explanation of symbols]
(1) Chassis
(2) Pickup
(3) First positioning mechanism
(4) Guide shaft
(5) Adjustment mechanism
(6) Adjustment screw
(7) Disc
(8) Second positioning mechanism
(9) Bracket
(10) Through hole
(11) Edge
(80) Back plate
(92) Positioning protrusion

Claims (3)

シャーシ(1)上にディスク(7)中心に対して接近離間可能に設けられたピックアップ(2)と、該ピックアップ(2)の移動方向に延びピックアップ(2)が嵌まるガイド軸(4)と、ピックアップ(2)の移動方向を含みシャーシ(1)上面に直交した面内にてガイド軸(4)の傾き角度を変える調整機構(5)を設け、該調整機構(5)はガイド軸(4)の端部を保持し、シャーシ ( ) にビス (30) 止めされるブラケット(9)と、該ガイド軸(4)を上向き又は下向きに付勢するバネ体と、バネ体に抗してガイド軸(4)を押し込む調整ネジ(6)を具えたディスク記録又は再生装置に於いて、
調整機構(5)はシャーシ(1)上にてブラケット(9)の位置を定める第1の位置決め機構(3)と、シャーシ(1)面に略平行な面内にて調整ネジ(6)の位置を定め、調整ネジ(6)の進行方向をガイド軸(4)の中心Cに正確に向ける第2の位置決め機構(8)を具え、
第1の位置決め機構 ( ) は、ブラケット ( ) に設けられた舌片 (91) をシャーシ ( ) に開設された透孔 (10) に嵌めて構成され、ブラケット ( ) は舌片 (91) を透孔 (10) のビス (30) 回転側の端縁 (11) に当接させて位置決めされ、
第2の位置決め機構 ( ) は、調整ネジ ( ) が螺合しブラケット ( ) にビス (85) 止めされる受け板 (80) と、ブラケット ( ) 上の位置決め突起 (92) を具え、受け板 (80) はビス (85) 回転側の切欠き (81) を位置決め突起 (92) に当接させて位置決めされることを特徴とするディスク記録又は再生装置。
A pickup (2) provided on the chassis (1) so as to be close to and away from the center of the disk (7), and a guide shaft (4) extending in the moving direction of the pickup (2) and receiving the pickup (2). And an adjustment mechanism (5) for changing the inclination angle of the guide shaft (4) in a plane orthogonal to the upper surface of the chassis (1) including the moving direction of the pickup (2). 4) A bracket (9) that holds the end of 4) and is fixed to the chassis ( 1 ) with a screw (30) , a spring body that biases the guide shaft (4) upward or downward, and a spring body. In a disk recording or reproducing apparatus having an adjusting screw (6) for pushing the guide shaft (4)
The adjustment mechanism (5) includes a first positioning mechanism (3) for determining the position of the bracket (9) on the chassis (1) and an adjustment screw (6) in a plane substantially parallel to the surface of the chassis (1). A second positioning mechanism (8) for determining the position and directing the direction of travel of the adjusting screw (6) to the center C of the guide shaft (4);
The first positioning mechanism (3) is constructed to fit tongue provided on the bracket (9) and (91) to the chassis (1) to be opened a hole (10), the bracket (9) is tongue (91) is positioned by contacting the end (11) of the through hole (10) on the screw (30) rotation side of the through hole (10) ,
The second positioning mechanism (8) is receiving plate adjustment screw (6) is bis (85) to the screwed bracket (9) is stopped and (80), the positioning projection on the bracket (9) (92) The disk recording or reproducing device , wherein the receiving plate (80) is positioned by bringing a notch (81) on the rotating side of the screw (85 ) into contact with the positioning projection (92) .
第1の位置決め機構(3)を構成する舌片 (91) は、シャーシ ( ) と同一面内に位置する請求項1に記載のディスク記録又は再生装置。The disc recording or reproducing device according to claim 1, wherein the tongue piece (91) constituting the first positioning mechanism (3) is located in the same plane as the chassis ( 1 ) . シャーシ(1)上にディスク(7)中心に対して接近離間可能に設けられたピックアップ(2)と、該ピックアップ(2)の移動方向に延びピックアップ(2)が嵌まるガイド軸(4)と、ピックアップ(2)の移動方向を含みシャーシ(1)上面に直交した面内にてガイド軸(4)の傾き角度を変える調整機構(5)を設け、該調整機構(5)はガイド軸(4)の端部を保持し、シャーシ(1)にビス(30)止めされるブラケット(9)と、該ガイド軸(4)を上向き又は下向きに付勢するバネ体と、バネ体に抗してガイド軸(4)を押し込む調整ネジ(6)を具え、ブラケット(9)はシャーシ(1)に開設された透孔(10)に嵌まる舌片(91)を有し、ブラケット(9)上には調整ネジ(6)が螺合する受け板(80)がビス(85)止めされたディスク記録又は再生装置の調整機構(5)を位置決めする方法であって、
舌片(91)を透孔(10)に嵌める工程と、
ビス(30)をシャーシ(1)を通ってブラケット(9)に螺合させ、舌片(91)を透孔(10)のビス(30)回転側の端縁(11)に当接させる工程と、
ブラケット(9)に受け板(80)を被せる工程と、
ビス(30)を受け板(80)を通ってブラケット(9)に螺合させ、受け板(80)のビス(85)回転側の切欠き(81)を、ブラケット(9)上の位置決め突起(92)に当接させる工程を具えた調整機構(5)を位置決めする方法。
A pickup (2) provided on the chassis (1) so as to be close to and away from the center of the disk (7), and a guide shaft (4) extending in the moving direction of the pickup (2) and receiving the pickup (2). And an adjustment mechanism (5) for changing the inclination angle of the guide shaft (4) in a plane orthogonal to the upper surface of the chassis (1) including the moving direction of the pickup (2). 4) A bracket (9) that holds the end of 4) and is fixed to the chassis (1) with screws (30), a spring body that urges the guide shaft (4) upward or downward, and a spring body. The bracket (9) has a tongue piece (91) that fits into a through hole (10) provided in the chassis (1), and has an adjustment screw (6) for pushing the guide shaft (4). Above, there is a method for positioning the adjusting mechanism (5) of the disk recording or reproducing apparatus in which the receiving plate (80) to which the adjusting screw (6) is screwed is fixed with the screw (85),
Fitting the tongue piece (91) into the through hole (10);
The screw (30) is screwed into the bracket (9) through the chassis (1), and the tongue piece (91) is brought into contact with the end (11) of the through hole (10) on the screw (30) rotation side. When,
Covering the bracket (9) with the backing plate (80);
Screw (30) passes through the receiving plate (80) and is screwed into the bracket (9), and the notch (81) on the rotating side of the screw (85) of the receiving plate (80) is positioned on the positioning projection on the bracket (9). (92) A method of positioning the adjusting mechanism (5) including the step of contacting the same.
JP2000170239A 2000-06-07 2000-06-07 Disc recording or reproducing apparatus having a pickup tilt adjusting mechanism and method for positioning the adjusting mechanism Expired - Fee Related JP3691354B2 (en)

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