JPS62120427U - - Google Patents

Description

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

第１図〜第３図は本考案の一実施例を示すもの
で、第１図は分解斜面図、第２図は平面図、第３
図は磁気回路の説明図で、第４図〜第７図は他の
実施例を示すもので、第４図は分解斜面図、第５
図は平面図、第６図は磁気回路の説明図、第７図
は引張り力の説明図である。第８図と第９図、第
１０図と第１１図はそれぞれ異なつた従来の光学
式ピツクアツプのアクチユエータの分解斜面図と
平面図である。 ２１，３１…対物レンズ、２２，３２…ホルダ
、２３，３３…フオーカスコイル、２４，３４…
トラツキングコイル、２５，３５…ワイヤ、２６
，３６…固定部材、２７，３７…磁石、２８，３
８…固定ヨーク、２９，３９…可動ヨーク。 Figures 1 to 3 show an embodiment of the present invention. Figure 1 is an exploded slope view, Figure 2 is a plan view, and Figure 3 is a plan view.
The figure is an explanatory diagram of the magnetic circuit, and Figures 4 to 7 show other embodiments. Figure 4 is an exploded perspective view, and Figure 5 is an exploded perspective view.
The figure is a plan view, FIG. 6 is an explanatory diagram of the magnetic circuit, and FIG. 7 is an explanatory diagram of tensile force. FIGS. 8 and 9, and FIGS. 10 and 11 are exploded perspective views and plan views of different conventional optical pickup actuators, respectively. 21, 31... Objective lens, 22, 32... Holder, 23, 33... Focus coil, 24, 34...
Tracking coil, 25, 35...Wire, 26
, 36... Fixed member, 27, 37... Magnet, 28, 3
8... Fixed yoke, 29, 39... Movable yoke.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 対物レンズ等の光学系を備え、可撓部材により
固定部材に対して可動的に支持されるホルダに、
固定ヨークに対向して該ホルダの固定部材側に設
けられた可動ヨークと、固定ヨーク、可動ヨーク
の何れかに固定された磁石とで磁気回路を形成し
、少くともフオーカスコイル、トラツキングコイ
ルの何れかを固定ヨークに固定したことを特徴と
する光学式ピツクアツプのアクチユエータ。 A holder equipped with an optical system such as an objective lens and movably supported by a flexible member with respect to a fixed member,
A magnetic circuit is formed by a movable yoke provided on the fixed member side of the holder opposite to the fixed yoke, and a magnet fixed to either the fixed yoke or the movable yoke, and includes at least a focus coil and a tracking coil. An optical pick-up actuator, characterized in that either one of the above is fixed to a fixed yoke.