JPS63114412U

JPS63114412U -

Info

Publication number: JPS63114412U
Application number: JP735187U
Authority: JP
Priority date: 1987-01-21
Filing date: 1987-01-21
Publication date: 1988-07-23

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案に係る光ピツクアツプの対物
レンズ駆動装置の第１実施例を示す平面図、第２
図は第１図に示した装置の一部を省略して示した
斜視図、第３図は第１図に示した装置の可動部を
示す分解斜視図、第４図はこの考案に係る光ピツ
クアツプの対物レンズ駆動装置の第２実施例を示
す第３図と同様な分解斜視図、第５図は従来の対
物レンズ駆動装置を示す平面図、第６図は第５図
に示した装置の可動部の平面図、第７図は第６図
に示した装置のコイルを示す斜視図である。５０……基台、５１……永久磁石、６０……弾
性体、７０，８０……可動部、７２，８３……フ
オーカシングコイル、７３，８７……トラツキン
グコイル、７４，８１……第１部材、７４ａ，８
４……ボビン部、７５，８２……第２部材。 FIG. 1 is a plan view showing a first embodiment of an objective lens driving device for an optical pickup according to this invention;
The figure is a perspective view of the device shown in FIG. 1 with some parts omitted, FIG. 3 is an exploded perspective view showing the movable parts of the device shown in FIG. FIG. 5 is an exploded perspective view similar to FIG. 3 showing a second embodiment of a pickup objective lens driving device, FIG. 5 is a plan view showing a conventional objective lens driving device, and FIG. FIG. 7 is a plan view of the movable part and a perspective view showing the coil of the device shown in FIG. 6. 50... Base, 51... Permanent magnet, 60... Elastic body, 70, 80... Moving part, 72, 83... Focusing coil, 73, 87... Tracking coil, 74, 81... First member, 74a, 8
4... Bobbin section, 75, 82... Second member.

Claims

【実用新案登録請求の範囲】 (1) １個の永久磁石による閉磁気回路を有する
基台と、対物レンズを保持すると共に、弾性体を
介して前記基台に支持された可動部とを有する光
ピツクアツプの対物レンズ駆動装置において、前記可動部は、フオーカシングコイルを直接巻
き付けるボビン部が設けられた第１部材に第２部
材を接合することによつて形成され、前記対物レ
ンズを保持する部位が、該対物レンズの光軸方向
に沿つて前記フオーカシングコイルを挟む両側で
前記ボビン部と連続する構成とされたことを特徴
とする光ピツクアツプの対物レンズ駆動装置。 (2) 前記第２部材は、前記対物レンズを保持す
ると共に、該対物レンズの光軸方向に沿つて前記
フオーカシングコイルを挟む両側で前記ボビン部
に接合されることを特徴とする実用新案登録請求
の範囲第１項に記載の光ピツクアツプの対物レン
ズ駆動装置。 (3) 前記第１部材には、前記対物レンズの光軸
方向に沿つて前記フオーカシングコイルを挟む一
側から対物レンズを保持するホルダー部が延設さ
れ、前記第２部材は、前記対物レンズの光軸方向
に沿つて前記フオーカシングコイルを挟む他側と
前記ホルダー部とに接合されることを特徴とする
実用新案登録請求の範囲第１項に記載の光ピツク
アツプの対物レンズ駆動装置。[Claims for Utility Model Registration] (1) A base having a closed magnetic circuit formed by one permanent magnet, and a movable part that holds an objective lens and is supported by the base via an elastic body. In the objective lens driving device for an optical pickup, the movable part is formed by joining a second member to a first member provided with a bobbin part around which a focusing coil is directly wound, and the movable part holds the objective lens. An objective lens driving device for an optical pickup, characterized in that a portion is continuous with the bobbin portion on both sides of the focusing coil along the optical axis direction of the objective lens. (2) The utility model characterized in that the second member holds the objective lens and is joined to the bobbin portion on both sides sandwiching the focusing coil along the optical axis direction of the objective lens. An objective lens driving device for an optical pickup according to claim 1. (3) The first member has a holder portion extending from one side sandwiching the focusing coil along the optical axis direction of the objective lens, and the second member holds the objective lens. The objective lens driving device for an optical pickup according to claim 1, wherein the objective lens driving device for an optical pickup according to claim 1 is joined to the other side sandwiching the focusing coil along the optical axis direction of the lens and the holder portion. .