JPH0810493B2 - Optical pickup device - Google Patents
Optical pickup deviceInfo
- Publication number
- JPH0810493B2 JPH0810493B2 JP10262588A JP10262588A JPH0810493B2 JP H0810493 B2 JPH0810493 B2 JP H0810493B2 JP 10262588 A JP10262588 A JP 10262588A JP 10262588 A JP10262588 A JP 10262588A JP H0810493 B2 JPH0810493 B2 JP H0810493B2
- Authority
- JP
- Japan
- Prior art keywords
- pickup device
- absorbing member
- optical pickup
- deformation absorbing
- optical unit
- 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
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Head (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は光ピックアップ装置の改良に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an improvement of an optical pickup device.
［従来の技術］ 第３図は従来の光ピックアップ装置の斜視図、第４図
はその一部断面図で、図中１は光検知器、２は該検知器
を装着する鋼製の検知器プレート、３はディスクへレー
ザ光を照射し反射光を光検知器１に集光する機能を有す
る亜鉛製の光学ユニット、４はプレート２を光学ユニッ
ト３に固着するための固定ねじ、５はベース、６は対物
レンズをディスクの面捩れ偏心などに追従して移動させ
るための装置のカバー、７は接着剤、８は垂直抗力、９
はその反作用力、10は剪断力、11は摩擦力、12は接着剤
による固定力、13は接触面である。[Prior Art] FIG. 3 is a perspective view of a conventional optical pickup device, and FIG. 4 is a partial sectional view thereof, in which 1 is a photodetector and 2 is a steel detector to which the detector is attached. A plate 3 is an optical unit made of zinc having a function of irradiating a disk with laser light and condensing reflected light on the photodetector 1, 4 is a fixing screw for fixing the plate 2 to the optical unit 3, and 5 is a base. , 6 is a cover of an apparatus for moving the objective lens following the surface twist eccentricity of the disk, 7 is an adhesive, 8 is a vertical drag force, 9
Is its reaction force, 10 is a shearing force, 11 is a frictional force, 12 is a fixing force by an adhesive, and 13 is a contact surface.
図にみるように、鋼製の検知器プレート２は光学ユニ
ット３に２個の固定ねじ４により締着されており、その
結果プレート２と光学ユニット３の接触面13には垂直抗
力８とその抗力８の反作用力９が作用している。なお接
着剤７はねじ４による締着を補強するためのものであ
る。As shown in the figure, the steel detector plate 2 is fastened to the optical unit 3 by two fixing screws 4, so that the contact surface 13 between the plate 2 and the optical unit 3 has a normal force 8 and The reaction force 9 of the drag force 8 acts. The adhesive 7 is for reinforcing the fastening by the screw 4.
ところで上記のように構成されている光ピックアップ
装置に温度変化が作用すると、鋼製の検知器プレート２
と亜鉛製の光学ユニット３とではその熱膨張係数が相違
するため、両者の接触面13に大きな剪断力10が発生す
る。このとき、垂直抗力８による摩擦力11と接着剤７に
よる固定力12とが、剪断力10に釣り合うように作用する
ため、プレート２と光学ユニット３との間にはずれは発
生しない。By the way, when a temperature change acts on the optical pickup device configured as described above, the steel detector plate 2
Since the coefficient of thermal expansion is different between the optical unit 3 made of zinc and the optical unit 3 made of zinc, a large shearing force 10 is generated on the contact surface 13 between them. At this time, the frictional force 11 due to the vertical reaction force 8 and the fixing force 12 due to the adhesive 7 act so as to balance the shearing force 10, so that no deviation occurs between the plate 2 and the optical unit 3.
［発明が解決しようとする課題］ ところで上記光ピックアップ装置において、接着剤７
を欠くと、プレート２と光学ユニット３との固定力は摩
擦力だけとなり、剪断力10の方がずっと大きくなるた
め、プレート２と光学ユニット３とは大きくずれること
となり、光ピックアップ装置の性能劣化を招く。そのた
め検知器プレート２と光学ユニット３との固定には接着
剤７の使用は不可欠であるが、接着効果にばらつきがあ
ると、温度変化によりプレート２と光学ユニット３との
間に熱膨張によるずれを生じ、光ピックアップ装置の性
能が安定しないという問題点を抱えていた。[Problems to be Solved by the Invention] In the above optical pickup device, the adhesive 7 is used.
If the gap is omitted, the fixing force between the plate 2 and the optical unit 3 is only frictional force, and the shearing force 10 is much larger, so that the plate 2 and the optical unit 3 are largely displaced, and the performance of the optical pickup device deteriorates. Invite. Therefore, the use of the adhesive 7 is indispensable for fixing the detector plate 2 and the optical unit 3, but if there is a variation in the bonding effect, the plate 2 and the optical unit 3 are displaced due to thermal expansion due to temperature changes. And the performance of the optical pickup device is not stable.
本発明は従来装置の上記課題を解決するためになされ
たもので、接着剤を必要とせず、温度変化による性能劣
化を起こさない光ピックアップ装置を提供しようとする
ものである。The present invention has been made to solve the above problems of the conventional device, and an object thereof is to provide an optical pickup device that does not require an adhesive and does not cause performance deterioration due to temperature change.
［課題を解決するための手段］ 本発明の第１の発明に係る光ピックアップ装置は、光
ディスクの信号を電気信号に変換する光ピックアップ装
置において、光ディスクへ光を照射し反射光を光検知器
に集光するなどの機能を有する光学ユニットと、光検知
器を装着する検知器プレートとを、温度変化に基づく光
学ユニットと検知器プレートとの間のずれを吸収する変
形吸収部材を介して固着したものである。[Means for Solving the Problems] An optical pickup device according to a first aspect of the present invention is an optical pickup device for converting a signal of an optical disc into an electrical signal, and irradiates the optical disc with light and uses reflected light as a photodetector. An optical unit having a function of condensing light and a detector plate on which a photodetector is mounted are fixed to each other via a deformation absorbing member that absorbs a shift between the optical unit and the detector plate due to a temperature change. It is a thing.
本発明の第２の発明に係る光ピックアップ装置は、第
１の発明において、変形吸収部材を、その表面の摩擦係
数が大である材料によって形成したものである。An optical pickup device according to a second invention of the present invention is the optical pickup device according to the first invention, wherein the deformation absorbing member is formed of a material having a large friction coefficient on the surface thereof.
本発明の第３の発明に係る光ピックアップ装置は、第
１の発明において、変形吸収部材を、縦弾性係数の小さ
い材料によって形成したものである。An optical pickup device according to a third invention of the present invention is the optical pickup device according to the first invention, wherein the deformation absorbing member is formed of a material having a small longitudinal elastic coefficient.
本発明の第４の発明に係る光ピックアップ装置は、第
１の発明において、変形吸収部材を、検知器プレートと
光学ユニットとの中間の熱膨張係数を有する材料によっ
て形成したものである。An optical pickup device according to a fourth aspect of the present invention is the optical pickup device according to the first aspect, wherein the deformation absorbing member is formed of a material having a thermal expansion coefficient intermediate between those of the detector plate and the optical unit.
本発明の第５の発明に係る光ピックアップ装置は、第
１の発明において、変形吸収部材を、検知器プレートと
光学ユニットとの中間の熱膨張係数を有するとともに、
縦弾性係数が小さい材料によって形成したものである。An optical pickup device according to a fifth aspect of the present invention is the optical pickup device according to the first aspect, wherein the deformation absorbing member has a thermal expansion coefficient intermediate between the detector plate and the optical unit,
It is made of a material having a small longitudinal elastic modulus.
［作用］ 本発明の第１の発明においては、変形吸収部材が、温
度変化に基づく光学ユニットと検知器プレートとの間の
ずれを吸収する。[Operation] In the first aspect of the present invention, the deformation absorbing member absorbs a shift between the optical unit and the detector plate due to a temperature change.
第２の発明においては、表面の摩擦係数が大きい変形
吸収部材が部品間の固定力を大きくし、温度変化に基づ
く光学ユニットと検知器プレートとの間のずれを吸収す
る。In the second aspect, the deformation absorbing member having a large surface friction coefficient increases the fixing force between the components and absorbs the displacement between the optical unit and the detector plate due to the temperature change.
第３の発明においては、縦弾性係数の小さい変形吸収
部材が、温度変化に基づく光学ユニットと検知器プレー
トとの伸びの差を吸収する。In the third invention, the deformation absorbing member having a small longitudinal elastic coefficient absorbs a difference in elongation between the optical unit and the detector plate due to a temperature change.
第４の発明においては、検知器プレートと光学ユニッ
トとの中間の熱膨脹係数を有する変形吸収部材が、部品
間の熱膨脹の差を小さくし、温度変化に基づく光学ユニ
ットと検知器プレートとの間のずれを吸収する。In the fourth invention, the deformation absorbing member having a thermal expansion coefficient intermediate between the detector plate and the optical unit reduces the difference in thermal expansion between the parts, and the deformation absorbing member between the optical unit and the detector plate based on the temperature change. Absorb the gap.
第５の発明においては、検知器プレートと光学ユニッ
トとの中間の熱膨脹係数を有するとともに縦弾性係数が
小さい変形吸収部材が、部品間の熱膨脹の差を小さくす
るとともに伸びの差を吸収して、温度変化に基づく光学
ユニットと検知器プレートとの間のずれを吸収する。In the fifth invention, the deformation absorbing member having a thermal expansion coefficient intermediate between the detector plate and the optical unit and having a small longitudinal elastic coefficient reduces the difference in thermal expansion between the parts and absorbs the difference in elongation, It absorbs the misalignment between the optical unit and the detector plate due to temperature changes.
［発明の実施例］ 第１図は本発明の一実施例を示す光ピックアップ装置
の斜視図、第２図はその一部断面図で、図中１〜６の従
来装置と同一または相当部品、8a、8bは垂直抗力、9a、
9bはその反作用力、10a、10bは剪断力、12a、12bは固定
力、13a、13bは部品の接触面、14はゴムによって形成し
た変形吸収部材である。[Embodiment of the Invention] FIG. 1 is a perspective view of an optical pickup device showing an embodiment of the present invention, and FIG. 2 is a partial sectional view thereof, which are the same as or equivalent to the conventional devices 1 to 6 in the figure. 8a and 8b are normal forces, 9a and
9b is its reaction force, 10a and 10b are shearing forces, 12a and 12b are fixing forces, 13a and 13b are contact surfaces of parts, and 14 is a deformation absorbing member formed of rubber.
図にみるように、検知器プレート２と光学ユニット３
との間に、変形吸収部材14を介装して固定ねじ４で締着
する。その結果検知器プレート２と変形吸収部材14の接
触面13a及び変形吸収部材13と光学ユニット３との接触
面13bには、垂直方向に垂直抗力8a、8b及びその反作用
力9a、9bが作用することとなる。As shown in the figure, the detector plate 2 and the optical unit 3
And the deformation absorbing member 14 is interposed between them and the fixing screw 4. As a result, on the contact surface 13a between the detector plate 2 and the deformation absorbing member 14 and the contact surface 13b between the deformation absorbing member 13 and the optical unit 3, the vertical reaction forces 8a and 8b and their reaction forces 9a and 9b act in the vertical direction. It will be.
この光ピックアップ装置に温度変化が作用すると、鋼
製の検知器プレート２と変形吸収部材14との接触面13a
及び変形吸収部材14と光学ユニット３との接触面13bに
は部品相互がずれようとする剪断力10a、10bが作用する
が、ゴム製の変形吸収部材14と各部品との接触面13a及
び13bにおける摩擦係数が大きいため、熱膨脹係数の差
による剪断力10a、10bより固定力12a、12bの方が大きく
なり接着剤を使用しなくても部品相互のずれは発生しな
い。When a temperature change acts on this optical pickup device, the contact surface 13a between the steel detector plate 2 and the deformation absorbing member 14
The contact surfaces 13b between the deformation absorbing member 14 and the optical unit 3 are subjected to shearing forces 10a and 10b that tend to shift the parts from each other. Since the coefficient of friction is large, the fixing forces 12a and 12b are larger than the shearing forces 10a and 10b due to the difference in the coefficient of thermal expansion, so that the components do not shift from each other without using an adhesive.
上述したように、熱膨脹係数の差の大きい鋼製の検知
器プレート２と亜鉛製の光学ユニット３との組み合わせ
でも、その間に摩擦係数の大きいゴム製の変形吸収部材
14を介装させることにより、部品間の固定力を大きくし
て部品のずれを防止することができる。その結果接着剤
を不要とし、光ピックアップ装置の品質の安定が得られ
るのである。As described above, even if the detector plate 2 made of steel having a large difference in thermal expansion coefficient and the optical unit 3 made of zinc are combined, the deformation absorbing member made of rubber having a large friction coefficient between them.
By interposing 14, the fixing force between the components can be increased and the displacement of the components can be prevented. As a result, no adhesive is required, and the quality of the optical pickup device can be stabilized.
なお本実施例では摩擦係数の大きい部材としてゴム製
の部材を利用しているが、バリや面粗しなどによって形
状による変形吸収部材の摩擦係数の増大を図ってもよ
い。In this embodiment, a rubber member is used as a member having a large friction coefficient, but it is also possible to increase the friction coefficient of the deformation absorbing member due to the shape by burr or surface roughening.
また上記変形吸収部材14を縦弾性係数の小さい例えば
アルミニウムによって形成し、プレート２と光学ユニッ
ト３との熱膨脹係数の差より起こる伸びの差を吸収させ
てもよい。Further, the deformation absorbing member 14 may be formed of, for example, aluminum having a small longitudinal elastic coefficient to absorb the difference in elongation caused by the difference in thermal expansion coefficient between the plate 2 and the optical unit 3.
さらに上記変形吸収部材14を熱膨脹係数が鋼と亜鉛の
中間にある材料によって形成し、部品間の熱膨脹の差を
小さくしてずれを吸収するようにしてもよい。Further, the deformation absorbing member 14 may be formed of a material having a coefficient of thermal expansion between steel and zinc so as to reduce the difference in thermal expansion between the parts and absorb the deviation.
さらにまた上記変形吸収部材14を熱膨脹係数が鋼と亜
鉛の中間にありかつ縦弾性係数の小さい材料によって形
成し、部品相互間の熱膨脹の差を小さくするとともに、
部品の伸びを吸収するようにしてもよい。Furthermore, the deformation absorbing member 14 is formed of a material having a coefficient of thermal expansion between steel and zinc and a small coefficient of longitudinal elasticity to reduce the difference in thermal expansion between the parts, and
You may make it absorb the elongation of components.
なお上記変形吸収部材14の使用は１個に限定するもの
でなく、複数個を重ねて使用してもよい。The use of the deformation absorbing member 14 is not limited to one, and a plurality of deformation absorbing members 14 may be used in a stacked manner.
［発明の効果］ 本発明は以上説明したとおり、光ディスクへ光を照射
し反射光を光検知器に集光するなどの機能を有する光学
ユニットと、光検知器を装着する検知器プレートとを、
温度変化に基づく光学ユニットと検知器プレートとの間
のずれを吸収する変形吸収部材を介して固着したから、
温度変化による部品間のずれが変形吸収部材により吸収
される。その結果接着剤の使用が不要となる。従って、
接着剤の接着ばらつきにより光ピックアップの品質が不
安定になるのを防止し、接着剤による光学部品の汚れを
なくすという優れた効果を上げることができる。[Effects of the Invention] As described above, the present invention includes an optical unit having a function of irradiating an optical disc with light and collecting reflected light on a photodetector, and a detector plate on which the photodetector is mounted.
Since it is fixed through the deformation absorbing member that absorbs the deviation between the optical unit and the detector plate due to the temperature change,
The deformation absorbing member absorbs the deviation between the components due to the temperature change. As a result, the use of an adhesive is unnecessary. Therefore,
It is possible to prevent the quality of the optical pickup from becoming unstable due to variations in adhesion of the adhesive, and it is possible to obtain an excellent effect of eliminating stains on the optical component due to the adhesive.
第１図は本発明の一実施例を示す光ピックアップ装置の
斜視図、第２図はその一部断面図、第３図は従来の光ピ
ックアップ装置の斜視図、第４図はその一部断面図であ
る。 図中は検知器プレート、３は光学ユニット、14は変形吸
収部材である。 なお図中同一符号は同一または相当部品を示すものであ
る。FIG. 1 is a perspective view of an optical pickup device showing an embodiment of the present invention, FIG. 2 is a partial sectional view thereof, FIG. 3 is a perspective view of a conventional optical pickup device, and FIG. 4 is a partial sectional view thereof. It is a figure. In the figure, a detector plate, 3 is an optical unit, and 14 is a deformation absorbing member. The same reference numerals in the drawings indicate the same or corresponding parts.
Claims (5)
ピックアップ装置において、 光ディスクへ光を照射し反射光を光検知器に集光するな
どの機能を有する光学ユニットと、上記光検知器を装着
する検知器プレートとを、温度変化に基づく上記光学ユ
ニットと検知器プレートとの間のずれを吸収する変形吸
収部材を介して固着したことを特徴とする光ピックアッ
プ装置。1. An optical pickup device for converting a signal of an optical disk into an electric signal, wherein an optical unit having a function of irradiating the optical disk with light and condensing reflected light on a photodetector, and mounting the photodetector. The optical pickup device is characterized in that the detector plate is fixed to the detector plate via a deformation absorbing member that absorbs a shift between the optical unit and the detector plate due to a temperature change.
が大である材料によって形成したことを特徴とする請求
項（１）記載の光ピックアップ装置。2. The optical pickup device according to claim 1, wherein the deformation absorbing member is formed of a material having a large friction coefficient on its surface.
材料によって形成したことを特徴とする請求項（１）記
載の光ピックアップ装置。3. The optical pickup device according to claim 1, wherein the deformation absorbing member is formed of a material having a small longitudinal elastic coefficient.
学ユニットとの中間の熱膨脹係数を有する材料によって
形成したことを特徴とする請求項（１）記載の光ピック
アップ装置。4. The optical pickup device according to claim 1, wherein the deformation absorbing member is formed of a material having a coefficient of thermal expansion intermediate between the detector plate and the optical unit.
学ユニットとの中間の熱膨脹係数を有するとともに、縦
弾性係数が小さい材料によって形成したことを特徴とす
る請求項（１）記載の光ピックアップ装置。5. The optical pickup according to claim 1, wherein the deformation absorbing member is formed of a material having a thermal expansion coefficient intermediate between the detector plate and the optical unit and a small longitudinal elastic coefficient. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10262588A JPH0810493B2 (en) | 1988-04-27 | 1988-04-27 | Optical pickup device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10262588A JPH0810493B2 (en) | 1988-04-27 | 1988-04-27 | Optical pickup device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01276439A JPH01276439A (en) | 1989-11-07 |
| JPH0810493B2 true JPH0810493B2 (en) | 1996-01-31 |
Family
ID=14332423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10262588A Expired - Lifetime JPH0810493B2 (en) | 1988-04-27 | 1988-04-27 | Optical pickup device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0810493B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008257831A (en) * | 2007-04-09 | 2008-10-23 | Sanyo Electric Co Ltd | Optical pickup device |
-
1988
- 1988-04-27 JP JP10262588A patent/JPH0810493B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01276439A (en) | 1989-11-07 |
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