公开(公告)号：US20040081442A1

公开(公告)日：2004-04-29

申请号：US10684411

申请日：2003-10-15

Applicant: PENTAX Corporation

Inventor： Hiroaki Suzuki

IPC: G03B003/00

CPC classification number: G02B7/04 ,  G02B7/08 ,  G03B3/00

Abstract: A switching mechanism of a lens barrel includes a stationary barrel having a stop groove; a lens holding ring, a distance adjustment ring and an AF/MF switching ring, each positioned concentrically with the stationary barrel. The AF/MF switching ring is prevented from rotating relative to the stationary barrel by engagement of the engaging member with the stop groove while a driving force is transferred from a power source to the distance adjustment ring to move the lens holding ring along the optical axis when the AF/MF switching ring is in the AF position. Rotation of the AF/MF switching ring is transferred to the distance adjustment ring to move the lens holding ring along the optical axis while the driving force is prevented from being transferred from the power source to the distance adjustment ring when the AF/MF switching ring is in the MF position.

公开(公告)号：US20030210478A1

公开(公告)日：2003-11-13

申请号：US10428756

申请日：2003-05-05

Applicant: PENTAX Corporation

Inventor： Hiroaki Suzuki

IPC: G02B007/02

CPC classification number: G02B7/10 ,  G02B7/102

Abstract: A zoom lens barrel includes a linear guide ring which is positioned about an optical axis and includes a linear guide slot; a cam ring which is coaxially positioned around the linear guide ring and includes a cam groove; and a movable lens frame which supports a lens group and includes a cam follower which passes through the linear guide slot and engages in the cam groove. The cam ring is provided with a large ring portion, a small ring portion having a smaller diameter than the large ring portion, and a radial flange portion positioned therebetween. The cam groove is formed on both the small ring portion and the radial flange portion so that one end of the cam groove constitutes an open end at the radial flange potion, whereby the cam follower can be inserted into the cam groove through the open end.

Abstract translation: 变焦镜头镜筒包括线性导向环，所述线性导向环围绕光轴定位并且包括线性导向槽; 凸轮环，其同轴地定位在所述线性导向环周围并且包括凸轮槽; 以及可移动透镜框架，其支撑透镜组并且包括通过直线引导槽并接合在凸轮槽中的凸轮从动件。 凸轮环设置有大的环部，具有比大环部小的直径的小环部分和位于它们之间的径向凸缘部分。 凸轮槽形成在小环部分和径向凸缘部分上，使得凸轮槽的一端构成径向凸缘部分的开口端，由此凸轮从动件可以通过开口端插入到凸轮槽中。