JPH0467439A - Objective lens driving device - Google Patents
Objective lens driving deviceInfo
- Publication number
- JPH0467439A JPH0467439A JP17889290A JP17889290A JPH0467439A JP H0467439 A JPH0467439 A JP H0467439A JP 17889290 A JP17889290 A JP 17889290A JP 17889290 A JP17889290 A JP 17889290A JP H0467439 A JPH0467439 A JP H0467439A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- driving coil
- drive coil
- free side
- objective lens
- 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.)
- Granted
Links
- 239000000853 adhesive Substances 0.000 claims abstract description 12
- 230000001070 adhesive effect Effects 0.000 claims abstract description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 230000002787 reinforcement Effects 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 241001070941 Castanea Species 0.000 description 1
- 235000014036 Castanea Nutrition 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、光ピツクアップに用いる対物レンズ駆動装
置、特にその駆動コイルの支持構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an objective lens drive device used for optical pickup, and particularly to a support structure for its drive coil.
［従来の技術］ 第４図は従来の対物レンズ駆動装置の平面図である。[Conventional technology] FIG. 4 is a plan view of a conventional objective lens driving device.
同図において、レンズホルダ（１）に保持された対物レ
ンズ（２）は、レンズホルダ（１）がシャフト（３）を
支点として変位するため、レンズホルダ（１）と一体に
変位する。レンズホルダ（１）には、バランサ（４）と
、駆動コイル（５）が支持されている。この駆動コイル
（５）の自由辺（５ｆ）は、ヨーク（６）とマグネット
（７）とからなる磁気回路中に配置されている。シャフ
ト（３）及びヨーク（６）は、アクチュエータペース（
８）に取り付けられている。In the figure, the objective lens (2) held by the lens holder (1) is displaced together with the lens holder (1) because the lens holder (1) is displaced using the shaft (3) as a fulcrum. A balancer (4) and a drive coil (5) are supported on the lens holder (1). The free side (5f) of this drive coil (5) is arranged in a magnetic circuit consisting of a yoke (6) and a magnet (7). The shaft (3) and yoke (6) are connected to the actuator pace (
8).
第５図は第４図のＡ−Ａ断面図、第６図は第４図のＣ−
Ｃ矢視側面図である。Figure 5 is a sectional view taken along line A-A in Figure 4, and Figure 6 is a cross-sectional view taken along line C-- in Figure 4.
It is a side view seen from arrow C.
両図から明らかなように、駆動コイル（５）の自由辺（
５ｆ）は、ヨーク（６）とマグネット（７）との間に形
成される空隙Ｇ内に挿入され、マグネット（７）との間
の小空隙ｇを保つよう配置される。その結果、駆動コイ
ル（５）の自由辺（５ｆ）はマグネット（７）による磁
束Ｂと直交する配置となる。ここで駆動コイル（５）の
自由辺（５ｆ）に紙面表側から裏側に向う電流Ｉを流す
と、フレミングの左手の法則による力Ｆ−Ｂ ｉｌが発
生し、自由辺（５ｆ）はこの力Ｆを第５図上方向に受け
る。これによりレンズホルダ（１）が上方向に動かされ
、対物レンズ（２）がフォーカス方向に移動されること
になる。As is clear from both figures, the free side of the drive coil (5) (
5f) is inserted into the gap G formed between the yoke (6) and the magnet (7), and is arranged so as to maintain a small gap G between it and the magnet (7). As a result, the free side (5f) of the drive coil (5) is arranged to be orthogonal to the magnetic flux B caused by the magnet (7). Here, when a current I flowing from the front side to the back side of the paper is applied to the free side (5f) of the drive coil (5), a force F-Bil is generated according to Fleming's left hand rule, and the free side (5f) is is received in the upward direction in Fig. 5. As a result, the lens holder (1) is moved upward, and the objective lens (2) is moved in the focus direction.
なお、ここで１は駆動コイル（５）の有効長である。ま
た、駆動コイル（５）に流す電流の方向を逆にすると、
レンズホルダ（１）ひいては対物レンズ（２）は逆に下
向きに移動する。Note that here, 1 is the effective length of the drive coil (5). Also, if the direction of the current flowing through the drive coil (5) is reversed,
On the contrary, the lens holder (1) and thus the objective lens (2) move downward.
［発明が解決しようとする課題］
このような動作において、駆動コイル（５）の自由辺（
５ｆ）に高域共振が加わった場合には、第７図に示され
るように大きな変形力（５ａ）が加わり、自由辺（５ｆ
）を大きく変形させてしまうことがあった。また、第８
図に示されるように、レンズホルダ（１）へ駆動コイル
（５）を接着固定する際に接着剤（１１）の一部の厚み
が厚くなる等により、マグネット（７）との空隙ｇか不
均一になってしまうことがあった。[Problem to be solved by the invention] In such an operation, the free side (
When high-frequency resonance is added to the free side (5f), a large deforming force (5a) is applied as shown in Figure 7, and the free side (5f)
) may be significantly deformed. Also, the 8th
As shown in the figure, when adhesively fixing the drive coil (5) to the lens holder (1), the thickness of a part of the adhesive (11) becomes thicker, so that the gap g with the magnet (7) may be increased. Sometimes it became uniform.
このように、従来の対物レンズ駆動装置においては、十
分な駆動力を得るために磁束を大きな値としかつ駆動コ
イルとマグネットとの間の空隙を小さく取る必要かあっ
た。このため駆動コイルの支持不良による動作不安定や
損傷をもたらすことがあり、また高域共振時に駆動コイ
ルか大きな変形をすることがあった。As described above, in the conventional objective lens driving device, in order to obtain sufficient driving force, it was necessary to increase the magnetic flux and keep the gap between the driving coil and the magnet small. This may result in unstable operation or damage due to insufficient support of the drive coil, and the drive coil may be significantly deformed during high-frequency resonance.
この発明は、かかる課題を解決するためになされたもの
で、駆動コイルのマグネット側への飛び出しを防止し、
かつ駆動コイルの高域共振特性を改善した対物レンズ駆
動装置を提供することを目的とする。This invention was made to solve this problem, and prevents the drive coil from protruding toward the magnet side.
It is also an object of the present invention to provide an objective lens drive device in which the high-frequency resonance characteristics of the drive coil are improved.
［課題を解決するための手段］
この発明に係る対物レンズ駆動装置は、レンズホルダの
駆動コイル支持部の近傍に設けられた複数の取付部と、
取付部間に張られて駆動コイル自由辺をレンズホルダ方
向に押止するワイヤと、ワイヤを駆動コイルの自由辺に
固定する接着補強層と、を有するものである。[Means for Solving the Problems] An objective lens drive device according to the present invention includes a plurality of mounting portions provided near a drive coil support portion of a lens holder;
It has a wire that is stretched between the mounting parts and presses the free side of the drive coil toward the lens holder, and an adhesive reinforcing layer that fixes the wire to the free side of the drive coil.
［作用］
この発明の対物レンズ駆動装置においては、駆動コイル
の自由辺がワイヤの引張力によって押止される。これに
より、駆動コイルのマグネット側への飛び出しが阻止さ
れる。[Operation] In the objective lens drive device of the present invention, the free side of the drive coil is held down by the tensile force of the wire. This prevents the drive coil from jumping out toward the magnet.
また、駆動コイル自由辺には、ワイヤが接着補強層によ
って固定される。これにより、駆動コイルの剛性が高め
られる。この結果、駆動コイルの自由辺の端部が自由端
でなくなるため、共振点が高域に上げられ、高域共振特
性が向上する。Further, a wire is fixed to the free side of the drive coil by an adhesive reinforcing layer. This increases the rigidity of the drive coil. As a result, the end of the free side of the drive coil is no longer a free end, so the resonance point is raised to a high frequency range, and the high frequency resonance characteristics are improved.
［実施例］
次に、図に示す実施例によってこの発明を更に詳細に説
明する。[Example] Next, the present invention will be explained in more detail with reference to an example shown in the drawings.
第１図（ａ）においては、レンズホルダ（１）に駆動コ
イル（５）を取り付けた状態が示されている。この発明
においては、特に、レンズホルダ（１）の駆動コイル自
由辺支持端（１ｂ）に取付部（９）が設けられ、駆動コ
イル（５）の自由辺（５ｆ）の外面に取付部（９）に取
り付けられたワイヤ（１０）が張られ、所定のテンショ
ンが加えられている。ワイヤ（１０）はテンションが加
えられることにより、レンズホルダ（１）のコイル取付
面（１ａ）に対して駆動コイル（５）を押。′１．ブク
。FIG. 1(a) shows a state in which a drive coil (5) is attached to a lens holder (1). In this invention, in particular, the mounting portion (9) is provided on the drive coil free side support end (1b) of the lens holder (1), and the mounting portion (9) is provided on the outer surface of the free side (5f) of the drive coil (5). ) is stretched and a predetermined tension is applied. When tension is applied to the wire (10), the drive coil (5) is pushed against the coil mounting surface (1a) of the lens holder (1). '1. Book.
第１図（ｂ）には、駆動コイル（５）の自由辺（５ｆ）
の側面が示されている。この図においては、ワイヤ（１
０）は、接着補強層（１２）によって、駆動コイル（５
）の自由辺（５ｆ）に接着固定されている。In Fig. 1(b), the free side (5f) of the drive coil (5)
side is shown. In this figure, the wire (1
0) is connected to the drive coil (5) by the adhesive reinforcing layer (12).
) is adhesively fixed to the free side (5f) of the
このように構成された本実施例の対物レンズ駆動装置に
よれば、駆動コイル（５）は、レンズホルダ（１）のコ
イル取付面（１ａ）に対して押えつけられ、更にワイヤ
（１０）が接着補強層（１２）によって固定されること
によって剛性が高められるため、第１図（ａ）に示す−
ｙ力方向の駆動コイル（５）の飛び出しが防止される。According to the objective lens drive device of this embodiment configured in this way, the drive coil (5) is pressed against the coil mounting surface (1a) of the lens holder (1), and the wire (10) is Since the rigidity is increased by being fixed by the adhesive reinforcing layer (12), as shown in FIG.
The drive coil (5) is prevented from popping out in the y-force direction.
また、この実施例によれば、駆動コイル（５）には、ワ
イヤ（１０）が接着補強層（１２）によって固着される
ので、剛性が格段に高まる。これにより、第３図に示す
ように、駆動コイル（５）の高域共振による変形量（５
ｂ）は十分小さくなり、レンズホルダ（１）の変形が十
分小さくなり、対物レンズ（２）への影響をなくすこと
かできる。Further, according to this embodiment, since the wire (10) is fixed to the drive coil (5) by the adhesive reinforcing layer (12), the rigidity is significantly increased. As a result, as shown in FIG. 3, the amount of deformation (5
b) becomes sufficiently small, the deformation of the lens holder (1) becomes sufficiently small, and the influence on the objective lens (2) can be eliminated.
上記の実施例においては、ワイヤ（１０）を左右の取付
部（９）間に一本ずつ張った例を示したか、これに限定
されるものではなく、他の張り方をしても良い。In the above embodiment, an example was shown in which one wire (10) was stretched between the left and right mounting portions (9), but the present invention is not limited to this, and other tension methods may be used.
例えば第２図（ａ）には、４個設けた取付部（９）に、
ワイヤ（１０）をＸ字状に交差させて張った例か示され
ている。For example, in Fig. 2(a), there are four mounting parts (9),
An example is shown in which the wires (10) are strung in an X-shape.
第２図（ｂ）には、４個の取付部（９）間に、ワイヤ（
１０）を２字状に張った例が示され、第２図（Ｃ）では
６個設けた取付部（９）に対してジグザク状にワイヤ（
１０）を張った例が示されている。In Fig. 2(b), there is a wire (
An example is shown in which wires (10) are strung in two-character shapes, and in FIG. 2(C), wires (
10) is shown.
また、第２図（ｄ）においては、四個設けた取付部（９
）の左右の取付部（９）間にそれぞれ二重にワイヤ（１
０）を張った例が示されている。In addition, in Fig. 2(d), four mounting parts (9
) between the left and right mounting parts (9) respectively.
0) is shown.
なお、ワイヤ（１０）の材質は、銅線、アルミ線、銅ク
ラツドアルミ線、リン青銅線、鋼線、またはビニル線な
ど、一定のテンションに耐えられるものであれば何でも
良い。Note that the wire (10) may be made of any material that can withstand a certain tension, such as copper wire, aluminum wire, copper-clad aluminum wire, phosphor bronze wire, steel wire, or vinyl wire.
［発明の効果コ
以上説明した通り、本発明によれば、対物レンズ駆動装
置の駆動コイルの自由辺をワイヤによって押止し、ワイ
ヤを接着補強層によって駆動コイルに固定する構造によ
り、駆動コイルの外側への飛び出し、ひいてはマグネッ
トとの接触を防ぐことができると共に、駆動コイルの高
域共振特性の向上するという効果が得られる。[Effects of the Invention] As explained above, according to the present invention, the free side of the drive coil of the objective lens drive device is held down by a wire, and the wire is fixed to the drive coil by an adhesive reinforcing layer. It is possible to prevent the coil from jumping out to the outside and from coming into contact with the magnet, and also to improve the high-frequency resonance characteristics of the drive coil.
第１図（ａ）はこの発明の一実施例による対物レンズ駆
動装置の駆動コイル部平面図、第１図（ｂ）は同じくこ
の発明の一実施例による駆動コイル部の側面図、第２図
（ａ）、第２図（ｂ）、第２図（ｃ） 、’４２図（ｄ
）はそれぞれこの発明によるワイヤの張り方の異なる実
施例を示す駆動コイル部側面図、第３図はこの発明によ
る駆動コイル部の高域共振特性の説明図、第４図は従来
の対物レンズ駆動装置の平面図、第５図は従来装置の駆
動コイル部縦断面図、第６図は従来装置の駆動コイル部
側面図、第７図は従来装置の駆動コイルの高域共振特性
の説明図、第８図は従来装置における駆動コイルの飛び
出しを示す説明図である。
図において、（１）はレンズホルダ、（２）は対物レン
ズ、（３）はシャフト、（４）はバランサ、（５）は駆
動コイル、（６）はヨーク、（７）はマグネット、（８
）はアクチュエータペース、（９）は取付部、（ユＯ）
はワイヤ、（１１）は接着剤、（１２）は接着補強層で
ある。
なお、各図中同一符号は同一または相当部分を示す。
ドレンス”ホルタ゛
１ｏ：コイル取付面
５：！Ａ区ｔカコイル
実す怪ｆクリの扁区ヂカコイノＵ打乎ｉ０第１図（０）
５ｆ自由乏
９：ワイヤ１ノ付邦FIG. 1(a) is a plan view of a drive coil portion of an objective lens drive device according to an embodiment of the present invention, FIG. 1(b) is a side view of the drive coil portion according to an embodiment of the present invention, and FIG. (a), Figure 2 (b), Figure 2 (c), Figure '42 (d
) are side views of the drive coil section showing different embodiments of the wire tensioning according to the present invention, FIG. 3 is an explanatory diagram of the high-frequency resonance characteristics of the drive coil section according to the present invention, and FIG. 4 is a diagram showing the conventional objective lens drive. A plan view of the device, FIG. 5 is a longitudinal sectional view of the drive coil portion of the conventional device, FIG. 6 is a side view of the drive coil portion of the conventional device, FIG. 7 is an explanatory diagram of the high-frequency resonance characteristics of the drive coil of the conventional device, FIG. 8 is an explanatory diagram showing the protrusion of a drive coil in a conventional device. In the figure, (1) is the lens holder, (2) is the objective lens, (3) is the shaft, (4) is the balancer, (5) is the drive coil, (6) is the yoke, (7) is the magnet, (8) is the
) is the actuator pace, (9) is the mounting part, (yuO)
is a wire, (11) is an adhesive, and (12) is an adhesive reinforcing layer. Note that the same reference numerals in each figure indicate the same or corresponding parts. Drain "holter" 1o: Coil mounting surface 5:! A section t Ka coil is real Kai f chestnut section Jika Koino U Uta i 0 Fig. 1 (0) 5f Freedom 9: Wire 1 connection
Claims (1)
と、自由辺が磁気回路中に存在するよう、レンズホルダ
に支持される駆動コイルと、レンズホルダの駆動コイル
支持部の近傍に設けられた複数の取付部と、取付部間に
張られて駆動コイルの自由辺をレンズホルダ方向に押止
するワイヤと、ワイヤを駆動コイルの自由辺に固定する
接着補強層とを備える対物レンズ駆動装置。an objective lens, a lens holder that holds the objective lens, a drive coil supported by the lens holder, and a plurality of An objective lens drive device comprising: a mounting portion; a wire stretched between the mounting portions to press the free side of the drive coil toward the lens holder; and an adhesive reinforcing layer that fixes the wire to the free side of the drive coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2178892A JPH0770081B2 (en) | 1990-07-06 | 1990-07-06 | Objective lens drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2178892A JPH0770081B2 (en) | 1990-07-06 | 1990-07-06 | Objective lens drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0467439A true JPH0467439A (en) | 1992-03-03 |
| JPH0770081B2 JPH0770081B2 (en) | 1995-07-31 |
Family
ID=16056521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2178892A Expired - Lifetime JPH0770081B2 (en) | 1990-07-06 | 1990-07-06 | Objective lens drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0770081B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06319294A (en) * | 1993-09-10 | 1994-11-15 | Nippon Parusumootaa Kk | Five-phase stepping motor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003059072A (en) | 2001-08-22 | 2003-02-28 | Funai Electric Co Ltd | Actuator of optical pickup device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5144081U (en) * | 1974-09-30 | 1976-04-01 | ||
| JPS5219201A (en) * | 1975-08-05 | 1977-02-14 | Agency Of Ind Science & Technol | Method of binding armature coils |
-
1990
- 1990-07-06 JP JP2178892A patent/JPH0770081B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5144081U (en) * | 1974-09-30 | 1976-04-01 | ||
| JPS5219201A (en) * | 1975-08-05 | 1977-02-14 | Agency Of Ind Science & Technol | Method of binding armature coils |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06319294A (en) * | 1993-09-10 | 1994-11-15 | Nippon Parusumootaa Kk | Five-phase stepping motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0770081B2 (en) | 1995-07-31 |
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