JP2526365Y2 - Photodiode support for optical pickup - Google Patents
Photodiode support for optical pickupInfo
- Publication number
- JP2526365Y2 JP2526365Y2 JP1988142262U JP14226288U JP2526365Y2 JP 2526365 Y2 JP2526365 Y2 JP 2526365Y2 JP 1988142262 U JP1988142262 U JP 1988142262U JP 14226288 U JP14226288 U JP 14226288U JP 2526365 Y2 JP2526365 Y2 JP 2526365Y2
- Authority
- JP
- Japan
- Prior art keywords
- photodiode
- adjusting screw
- support base
- optical pickup
- support
- 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 21
- 238000005452 bending Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Head (AREA)
Description
【考案の詳細な説明】 産業上の利用分野 本考案は光ピックアップのホトダイオード支持台に係
り、特にホトダイオードの位置調整機能を具備してなる
光ピックアップのホトダイオード支持台に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photodiode support for an optical pickup, and more particularly to a photodiode support for an optical pickup having a function of adjusting the position of the photodiode.
従来の技術 例えば光ディスク装置に組込まれる光ピックアップと
して実願昭63-59089に示される構造のものがある。この
種の光ピックアップでは、ホトダイオードを光ピックア
ップのケース体に取付けるのに、ホトダイオードを支持
台に固定した後に、この支持台をケース体に取付けるこ
とが行なわれている。また、ホトダイオードは光ピック
アップに内設される光学系とその光軸及び焦点等を高精
度に一致させる必要があることから、上記支持台にはホ
トダイオードの位置調整を行ない得るよう構成したもの
がある。2. Description of the Related Art For example, there is an optical pickup incorporated in an optical disk device having a structure shown in Japanese Utility Model Application No. 63-59089. In this type of optical pickup, in order to attach the photodiode to the case body of the optical pickup, the photodiode is fixed to a support, and then the support is attached to the case. In addition, since the photodiode needs to match the optical axis and the focal point, etc., of the optical system provided in the optical pickup with high accuracy, the support base is configured to be able to adjust the position of the photodiode. .
第３図に、ホトダイオードの位置調整を行ない得る従
来の支持台１を示す。同図において、２は、ホトダイオ
ード、３は支持台本体、４は調整ねじ、５は光ピックア
ップのケース体であり、支持台１は支持台本体３と調整
ねじ４とにより構成される。支持台本体３は１枚のバネ
材を折曲形成してなり、ホトダイオード２が取付けられ
る取付部3aとケース体５に固定される固定部3bとよりな
る。また、調整ねじ４は取付部3aに螺合しており、その
先端部は固定部3bと当接している。従って、調整ねじ４
を回動させることにより取付部3aと固定部3bの離間寸法
は変化（図中、Ｚ方向に変化）し、これによりホトダイ
オード２の位置調整を行ない得る構成とされていた。FIG. 3 shows a conventional support base 1 capable of adjusting the position of a photodiode. In the figure, 2 is a photodiode, 3 is a support base body, 4 is an adjustment screw, 5 is an optical pickup case body, and the support base 1 is composed of a support base body 3 and an adjustment screw 4. The support base body 3 is formed by bending a single spring material, and includes a mounting portion 3a to which the photodiode 2 is mounted and a fixing portion 3b to be fixed to the case body 5. Further, the adjusting screw 4 is screwed into the mounting portion 3a, and the tip end thereof is in contact with the fixing portion 3b. Therefore, adjusting screw 4
By rotating, the distance between the mounting portion 3a and the fixed portion 3b changes (changes in the Z direction in the figure), whereby the position of the photodiode 2 can be adjusted.
考案が解決しようとする課題 しかるに、上記従来の光ピックアップのホトダイオー
ド支持台１では、第４図及び第５図に示すように調整ね
じ４の先端が直接固定部3bと当接していたため、調整時
に調整ねじ４の回転トルクにより、また調整ねじ先端部
の偏心（調整ねじ４の先端は接触抵抗を小とするために
円錐形状とされている）により、第３図中矢印X,Y方向
に対する調整ずれを生じ、高精度の位置調整を行なうこ
とができないという課題があった。Problems to be Solved by the Invention However, in the photodiode support 1 of the above-described conventional optical pickup, the tip of the adjusting screw 4 directly contacts the fixing portion 3b as shown in FIGS. Due to the rotational torque of the adjusting screw 4 and the eccentricity of the tip of the adjusting screw (the tip of the adjusting screw 4 is formed in a conical shape in order to reduce the contact resistance), adjustment in the directions of arrows X and Y in FIG. There has been a problem that a displacement has occurred and a highly accurate position adjustment cannot be performed.
特に、第３図に示されるような支持台本体３を一枚の
バネ材を折曲形成し、かつ支持台本体３の折曲部位（第
３図に参照符号3cで示す），調整ねじ4,及びホトダイオ
ード２の配設位置を、折曲部位3cに近い側より調整ねじ
4,ホトダイオード２の順で配設した構成の支持台１で
は、各構成要素の配設がコンパクト化されており、支持
台１の小型化を図ることができる。また、調整ねじ４の
変位量に対してホトダイオード２は大きく変位するた
め、小型化された支持台１でも調整に必要なホトダイオ
ード２の変位量を確保することができる。In particular, the support base body 3 as shown in FIG. 3 is formed by bending a single spring material, and the bent portion of the support base body 3 (indicated by reference numeral 3c in FIG. 3), the adjusting screw 4 , And the arrangement position of the photodiode 2 from the side near the bent portion 3c with the adjusting screw
4. In the support base 1 having the configuration in which the photodiodes 2 are arranged in this order, the arrangement of each component is made compact, and the support base 1 can be made smaller. Further, since the photodiode 2 is largely displaced with respect to the amount of displacement of the adjusting screw 4, the amount of displacement of the photodiode 2 required for adjustment can be ensured even with the downsized support base 1.
しかるに、板バネとして機能する取付部3aは下方に向
け弾性力を付与しており、かつ各構成要素が上記のよう
に配設されていることにより力点及び作用点となる調整
ねじ４は支点となる折曲部位3cに近い位置に配設されて
いるため、調整ねじ４と固定部3bとの当接位置には大な
る力が作用することになる。これは、取付部3aに対し折
曲部位3cを支点とするてこの原理が作用するからであ
る。However, the mounting portion 3a functioning as a leaf spring imparts an elastic force downward, and the adjustment screw 4 serving as a power point and an action point by each component being disposed as described above serves as a fulcrum. Since it is disposed at a position close to the bent portion 3c, a large force acts on the contact position between the adjusting screw 4 and the fixing portion 3b. This is because the principle of leverage acts on the attachment portion 3a with the bent portion 3c as a fulcrum.
このように、調整ねじ４と固定部3bの当接部位に大な
る力が印加されるため、よって図３に示される構成の支
持台１では、上記した調整ねじ先端部の偏心に起因して
発生するX,Y方向の調整ずれの影響は大となる。As described above, since a large force is applied to the contact portion between the adjustment screw 4 and the fixing portion 3b, in the support base 1 having the configuration shown in FIG. 3, due to the eccentricity of the tip of the adjustment screw described above. The influence of the generated displacement in the X and Y directions is large.
本考案は上記の点に鑑みてなされたものであり、調整
時に調整ねじを回動しても調整ずれの生じない光ピック
アップのホトダイオード支持台を提供することを目的と
する。The present invention has been made in view of the above points, and an object of the present invention is to provide a photodiode support for an optical pickup in which an adjustment error does not occur even when an adjustment screw is rotated during adjustment.
課題を解決するための手段 上記課題を解決するために、本考案では、 バネ性を有する板状材をヘアピン状に折曲形成するこ
とにより、ホトダイオードが取付けられる取付部と、光
ピックアップのケース体に固定される固定部とが対向す
るように一体的に形成されてなる支持台本体と、 上記取付部に螺合すると共に先端部が上記固定部に当
接し、螺進度によりこの固定部と取付部との離間寸法を
調整することによりホトダイオードの位置調整を行なう
調整ねじとを具備し、 上記支持台本体の折曲部位，調整ねじ，及び光ピック
アップの配設位置を、折曲部位に近い側より調整ねじ，
ホトダイオードの順で配設すると共に、 上記調整ねじの先端に回動自在を構成でボールを配設
し、このボールを介して調整ねじが固定部と当接するよ
う構成したことを特徴とするものである。Means for Solving the Problems In order to solve the above problems, in the present invention, by forming a plate-like material having spring properties into a hairpin shape, a mounting portion to which a photodiode is mounted, and a case body of an optical pickup. A support base body integrally formed such that a fixing portion fixed to the mounting portion is opposed to the mounting portion, and a tip portion abuts on the fixing portion while being screwed to the mounting portion, and is attached to the fixing portion by a screwing degree. An adjusting screw for adjusting the position of the photodiode by adjusting a distance from the portion, the position of the bent portion of the support base body, the adjusting screw, and the arrangement position of the optical pickup being set closer to the bent portion. Adjustment screw,
In addition to the arrangement of the photodiodes, a ball is arranged so as to be rotatable at the tip of the adjusting screw, and the adjusting screw comes into contact with the fixed portion via the ball. is there.
作用 上記構成とされた光ピックアップのホトダイオード支
持台によれば、支持台本体の折曲部位，調整ねじ，及び
光ピックアップの配設位置を折曲部位に近い側より調整
ねじ，ホトダイオードの順で配設することにより、調整
ねじが固定部と当接する位置において大きな力が作用す
る構成であっても、調整ねじが回転自在の構成とされた
ボールを介して支持台本体の固定部と当接しているた
め、このボールはベアリングとして機能し、よって調整
ねじと固定部間の接触抵抗は極めて小さくなり、調整時
に調整ねじを回動してもその回転トルクの影響等は少な
くホトダイオードの位置ずれは生じず高精度の位置調整
を行うことができる。According to the photodiode support of the optical pickup having the above configuration, the bent portion of the support base, the adjusting screw, and the arrangement position of the optical pickup are arranged in the order of the adjusting screw and the photodiode from the side closer to the bent portion. With this arrangement, even when a large force is applied at a position where the adjustment screw comes into contact with the fixed portion, the adjustment screw comes into contact with the fixed portion of the support base body via the rotatable ball. Since the ball functions as a bearing, the contact resistance between the adjusting screw and the fixed part is extremely small, and even if the adjusting screw is rotated during adjustment, the influence of the rotating torque is small and the photodiode is displaced. High-precision position adjustment can be performed.
実施例 次に本考案の実施例について図面と共に説明する第１
図および第２図は本考案の一実施例である光ピックアッ
プのホトダイオード支持台６を示している。尚、第３図
乃至第５図において示した構成と同一構成については同
一符号を付してその説明を省略する。Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 2 and FIG. 2 show a photodiode support 6 of an optical pickup according to an embodiment of the present invention. The same components as those shown in FIGS. 3 to 5 are denoted by the same reference numerals, and description thereof will be omitted.
図２に示されるように、本考案に係る支持台６も、支
持台本体３を一枚のバネ材を折曲形成し、かつ支持台本
体３の折曲部位3c,本考案の要部となる調整ねじ7,及び
ホトダイオード２の配設位置を、折曲部位3cに近い側よ
り調整ねじ7,ホトダイオード２の順で配設した構成とさ
れている。よって、支持台６も各構成要素の配設がコン
パクト化されており、支持台１の小型化が図られてい
る。また、調整ねじ７の送り量に対してホトダイオード
２は大きく変位するため、小型化された支持台１でも調
整に必要なホドトダイオード２の変位量を確保すること
ができる。As shown in FIG. 2, the support base 6 according to the present invention also has the support main body 3 formed by bending a single spring material, and the bent portion 3 c of the support main body 3, the main part of the present invention and The arrangement position of the adjustment screw 7 and the photodiode 2 is arranged in the order of the adjustment screw 7 and the photodiode 2 from the side closer to the bent portion 3c. Therefore, the arrangement of the components of the support 6 is also made compact, and the size of the support 1 is reduced. Further, since the photodiode 2 is largely displaced with respect to the feed amount of the adjusting screw 7, the displacement of the photodiode 2 required for the adjustment can be secured even with the downsized support base 1.
続いて本考案の要部となる調整ねじ７に付いて説明す
る。Next, the adjusting screw 7 which is a main part of the present invention will be described.
各図に示すように、本考案に係る支持台６では、調整
ねじ７の先端部分にボール８を配設したことを特徴とす
る。このため、調整ねじ７の先端部にはボール８を配設
するための凹部7aが形成されている。この凹部7aは、そ
の内部でボール８が回動自在となるよう構成されてい
る。As shown in the drawings, the support base 6 according to the present invention is characterized in that a ball 8 is disposed at the tip of the adjustment screw 7. For this reason, a recess 7 a for disposing the ball 8 is formed at the tip of the adjusting screw 7. The recess 7a is configured so that the ball 8 can rotate inside thereof.
よって、調整ねじ７はボール８を介して固定部3bと当
接することになり、またボール８は回動自在の構成とな
っているため、調整ねじ８と固定部3bの接触抵抗は極め
て小さな値となる。よって、折曲部位3c,調整ねじ7,及
びホトダイオード２の配設位置を折曲部位3cに近い側よ
り調整ねじ7,ホトダイオード２の順で配設したことによ
り、調整ねじ７が固定部3bに当接する位置に大きな力が
印加される構造であっても、調整ねじ８を回動してもこ
れに起因してホトダイオード２がＸ方向,Y方向（第３図
参照）へ位置ずれすることはなくなり、ホトダイオード
２の位置決めを高精度に行なうことができる。また、従
来においては調整ねじに起因する位置ずれをなくすた
め、調整ねじの先端に偏心が生じないよう精密加工を行
なう必要があったが、この精密加工に比べて凹部7aの加
工精度は低くて良い（ボール８が回動可能に当接する精
度で足る）ため、調整ねじ７の加工性の向上を図ること
ができる。Therefore, the adjusting screw 7 comes into contact with the fixed portion 3b via the ball 8, and since the ball 8 is rotatable, the contact resistance between the adjusting screw 8 and the fixed portion 3b is extremely small. Becomes Therefore, the arrangement position of the bent portion 3c, the adjusting screw 7, and the photodiode 2 is arranged in the order of the adjusting screw 7, the photodiode 2 from the side closer to the bent portion 3c, so that the adjusting screw 7 is attached to the fixing portion 3b. Even if a large force is applied to the contact position, even if the adjusting screw 8 is rotated, the photodiode 2 will not be displaced in the X and Y directions (see FIG. 3) due to this. As a result, the positioning of the photodiode 2 can be performed with high accuracy. In addition, in the past, in order to eliminate the displacement caused by the adjustment screw, it was necessary to perform precision processing so as not to cause eccentricity at the tip of the adjustment screw, but the processing accuracy of the concave portion 7a is lower than this precision processing. Since it is good (the accuracy with which the ball 8 abuts rotatably is sufficient), the workability of the adjusting screw 7 can be improved.
尚、ホトダイオード２の取付時におけるX,Y方向に対
する位置決めは、支持台６を光ピックアップのケース体
５に固定（接着固定）する際に行なわれるため、本願に
係る調整ねじ７を用いた調整とは関係のないことを付記
しておく。The positioning in the X and Y directions at the time of mounting the photodiode 2 is performed when the support base 6 is fixed (adhesively fixed) to the case body 5 of the optical pickup. Note that is not relevant.
考案の効果 上述の如く、本考案によれば、調整ねじはボールを介
して支持台本体の固定部と当接し、かつボールは回動自
在の構成とされているためベアリングとして機能し、調
整ねじと固定部間の接触抵抗は極めて小となるため、調
整時に調整ねじを回動してもその回転トルクの影響等は
なくホトダイオードの位置ずれは生じず、高精度の位置
調整を行なうことができる等の特長を有する。Effect of the Invention As described above, according to the present invention, the adjusting screw contacts the fixed portion of the support base body via the ball, and the ball is rotatable so that it functions as a bearing. When the adjustment screw is turned during adjustment, the contact torque between the screw and the fixed portion is extremely small, so that there is no influence of the rotation torque or the like, and there is no displacement of the photodiode, so that the position can be adjusted with high accuracy. Features such as
第１図は本考案の一実施例になる支持台のボール近傍を
拡大して示す断面図、第２図は本考案の一実施例になる
支持台の側面図、第３図は従来の支持台の一例を示す斜
視図、第４図は従来の支持台の一例の側面図、第５図は
従来における調整ねじと固定部の当接位置を拡大して示
す図である。 ３……支持台本体、3a……取付部、3b……固定部、６…
…支持台、７……調整ねじ、7a……凹部、８……ボー
ル。FIG. 1 is an enlarged sectional view showing the vicinity of a ball of a support base according to one embodiment of the present invention, FIG. 2 is a side view of the support base according to one embodiment of the present invention, and FIG. FIG. 4 is a perspective view showing an example of the base, FIG. 4 is a side view of an example of the conventional support base, and FIG. 5 is an enlarged view showing a contact position between a conventional adjusting screw and a fixing portion. 3 ... support base body, 3a ... mounting part, 3b ... fixed part, 6 ...
... Supporting stand, 7 ... Adjustment screw, 7a ... Recess, 8 ... Ball.
フロントページの続き (72)考案者 小池 邦男 神奈川県厚木市愛甲968番地の１ 第２ コーポ落合107 (56)参考文献 特開 昭63−268130（ＪＰ，Ａ) 実開 昭63−130914（ＪＰ，Ｕ)Continuation of the front page (72) Inventor Kunio Koike No. 968 Aiko, Atsugi-shi, Kanagawa 1 Second Corp. Ochiai 107 (56) References JP-A-63-268130 (JP, A) Jpn. U)
Claims (1)
形成することにより、ホトダイオードが取付けられる取
付部と、光ピックアップのケース体に固定される固定部
とが対向するよう一体的に形成されてなる支持台本体
と、 該取付部に螺合すると共に先端部が該固定部に当接し、
螺進度により該固定部と該取付部との離間寸法を調整す
ることにより該ホトダイオードの位置調整を行なう調整
ねじとを具備し、 上記支持台本体の折曲部位，該調整ねじ，及び該ホトダ
イオードの配設位置を、該折曲部位に近い側より調整ね
じ，ホトダイオードの順で配設すると共に、 該調整ねじの先端に回動自在の構成でボールを配設し、
該ボールを介して該調整ねじが該固定部と当接するよう
構成してなる光ピックアップのホトダイオード支持台。1. A mounting member to which a photodiode is mounted and a fixing portion to be fixed to a case body of an optical pickup are integrally formed by bending a plate-like material having a spring property into a hairpin shape so as to face each other. A support base body formed, screwed into the mounting portion, and a distal end portion abutting on the fixing portion,
An adjusting screw for adjusting a position of the photodiode by adjusting a separation dimension between the fixing portion and the mounting portion according to a degree of screwing; a bent portion of the support base body, the adjusting screw, and an adjusting screw; Arrangement positions are arranged in the order of an adjusting screw and a photodiode from the side closer to the bent portion, and a ball is arranged at the tip of the adjusting screw so as to be rotatable,
A photodiode support for an optical pickup, wherein the adjustment screw is configured to abut the fixed portion via the ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988142262U JP2526365Y2 (en) | 1988-10-31 | 1988-10-31 | Photodiode support for optical pickup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988142262U JP2526365Y2 (en) | 1988-10-31 | 1988-10-31 | Photodiode support for optical pickup |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0265214U JPH0265214U (en) | 1990-05-16 |
| JP2526365Y2 true JP2526365Y2 (en) | 1997-02-19 |
Family
ID=31408064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988142262U Expired - Lifetime JP2526365Y2 (en) | 1988-10-31 | 1988-10-31 | Photodiode support for optical pickup |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2526365Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4425828B2 (en) * | 2005-06-10 | 2010-03-03 | 三菱電機株式会社 | Thermal overload relay |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63268130A (en) * | 1987-04-24 | 1988-11-04 | Mitsubishi Electric Corp | Photodetector adjusting mechanism |
-
1988
- 1988-10-31 JP JP1988142262U patent/JP2526365Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0265214U (en) | 1990-05-16 |
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