LENS DRIVING ACTUATOR AND PORTABLE TERMINAL

To improve the optical characteristics of a compact portable terminal such as a mobile telephone and a smartphone, while maintaining its thinness.SOLUTION: A lens driving actuator comprises: an upper cover that has an opening through which light passes; a lens barrel 1 that is arranged inside the upper cover and provided therein with a lens transmitting light; a fourth gear 14 that is provided on an outer peripheral part of the lens barrel and moves the lens barrel 1 along an optical axis direction of the lens; a driving source 3 that is provided at a position overlapping the fourth gear 14 in the optical axis direction and supplies a driving force to the fourth gear 14; and a sensor PI2 for detecting the position in the optical axis direction of the lens barrel 1. The sensor PI2 is provided at a position overlapping the driving source 3 in the optical axis direction and on the opposite side of a side where the driving source 3 is arranged with respect to a contact between the lens barrel 4 and the fourth gear 14.SELECTED DRAWING: Figure 7 【課題】携帯電話やスマートフォンなどの小型の携帯端末において、薄さを維持しつつ、光学特性を向上させることが求められている。【解決手段】光が通過する開口を有する上カバーと、上カバー内に配置され、内部に光を透過するレンズが設けられた鏡筒１と、前記鏡筒の外周部に設けられて、鏡筒１をレンズの光軸方向に沿って移動させる第４ギア１４と、光軸方向において第４ギア１４と重なる位置に設けられて、第４ギア１４に駆動力を供給する駆動源３と、鏡筒１の光軸方向における位置を検出するためのセンサＰＩ２と、を備え、センサＰＩ２は、光軸方向において、駆動源３と重なる位置、かつ、鏡筒４と第４ギア１４の接点に対して、駆動源３が配置されている側とは反対側に設けられていることを特徴とする。【選択図】図７