公开(公告)号：US20040156628A1

公开(公告)日：2004-08-12

申请号：US10775081

申请日：2004-02-11

Applicant: PENTAX Corporation

Inventor： Hitoshi Tanaka

IPC: G03B017/00

CPC classification number: G02B7/08

Abstract: A zoom lens barrel includes a linear guide ring; a moving frame having a male helicoid; a rotatable ring coupled to the linear guide ring; a female helicoid formed on the rotatable ring, and engaged with the male helicoid; a switching ring coupled to the rotatable ring; a switching member; and a switching-member moving groove including a first inclined section, a switching section, a second inclined section and an assembling section. The lead angle of the first inclined section is the same but has an opposite inclination to that of the female helicoid. The follower projection is inserted in the first inclined section. The switching section extends parallel to the optical axis. The second inclined section extends parallel to the first inclined section. The assembling section extends rearwards from a front end of the second inclined section to be parallel to the optical axis.

Abstract translation: 变焦镜筒包括线性导向环; 具有雄螺旋的移动框架; 联接到所述线性导向环的可旋转环; 在旋转环上形成一个雌性螺旋体，并与男性螺旋体接合; 联接到所述可旋转环的开关环; 开关元件; 以及包括第一倾斜部，切换部，第二倾斜部和组装部的切换部件移动槽。 第一倾斜部分的前角相同，但与雌性螺旋体的倾斜角相反。 从动突起插入第一倾斜部分。 切换部分平行于光轴延伸。 第二倾斜部分平行于第一倾斜部分延伸。 组装部分从第二倾斜部分的前端向后延伸以平行于光轴。

公开(公告)号：US20040114257A1

公开(公告)日：2004-06-17

申请号：US10731473

申请日：2003-12-10

Applicant: PENTAX Corporation

Inventor： Hitoshi Tanaka ,  Takamitsu Sasaki ,  Kunihiko Shimizu

IPC: G02B007/02

CPC classification number: G02B7/021 ,  G02B7/10

Abstract: A step-zoom lens includes two movable lens groups; a lens group support unit; and a cam ring having a cam groove. The cam groove includes a finite number of focal-length steps, so as to perform a focusing operation between infinite and closest photographing positions at each focal-length step. The cam groove includes a wide-angle mode section, a telephoto mode section, and a mode switching section. The closest photographing positions in two adjacent focal-length steps and the infinite photographing positions in two adjacent focal-length steps are adjacent to each other, respectively. One focal-length step of the infinite photographing position at a longest focal length in the wide-angle mode section is provided at one end of the mode switching section, and another focal-length step of the infinite photographing position at a shortest focal length in the telephoto mode section is provided at the other end.

Abstract translation: 步进变焦镜头包括两个可移动透镜组; 镜头组支持单元; 以及具有凸轮槽的凸轮环。 凸轮槽包括有限数量的焦距步长，以便在每个焦距步长处在无限和最近拍摄位置之间进行聚焦操作。 凸轮槽包括广角模式部分，长焦模式部分和模式切换部分。 两个相邻焦距步长中最接近的拍摄位置和两个相邻焦距步长中的无限拍摄位置分别相邻。 在模式切换部分的一端设置广角模式部分中最长焦距处的无限拍摄位置的一个焦距步长，并且在最短焦距处的无限拍摄位置的另一焦距步长 在另一端设置长焦模式部分。

公开(公告)号：US20040114253A1

公开(公告)日：2004-06-17

申请号：US10731475

申请日：2003-12-10

Applicant: PENTAX Corporation

Inventor： Hiroshi Nomura ,  Hitoshi Tanaka ,  Takamitsu Sasaki

IPC: G02B015/14

CPC classification number: G02B7/102 ,  G02B15/14

Abstract: A lens distance-varying mechanism for varying a distance between first and second lens groups includes a first lens frame; a second lens frame rotatable relative to the first lens frame; a relative-moving mechanism for moving the first and second lens frames to change a relative position therebetween on an optical axis when the second lens frame is positioned at each of forward and reverse rotation extremities thereof relative to the first lens frame; a differential linking ring which rotates together with the second lens frame; a differential ring which is rotated relative to the differential linking ring by a first angle of rotation greater than a second angle of rotation of the second lens frame relative to the first lens frame; and a biasing member, positioned between the differential ring and the differential linking ring, for absorbing a difference between the first and second angles of rotation.

Abstract translation: 用于改变第一和第二透镜组之间的距离的透镜变距机构包括第一透镜框架; 相对于所述第一透镜框架可旋转的第二透镜框架; 相对移动机构，用于当第二透镜框架位于相对于第一透镜框架的正向和反向旋转端部的每个位置时，使第一和第二透镜框架在光轴上移动以改变其相对位置; 与第二透镜框一起旋转的差动连接环; 差速器环相对于差速连接环旋转大于第二透镜框相对于第一透镜框的第二旋转角度的第一旋转角; 以及偏置构件，其位于所述差动环和所述差速连接环之间，用于吸收所述第一和第二旋转角度之间的差。

公开(公告)号：US20040114252A1

公开(公告)日：2004-06-17

申请号：US10731474

申请日：2003-12-10

Applicant: PENTAX Corporation

Inventor： Hitoshi Tanaka ,  Takamitsu Sasaki ,  Kunihiko Shimizu

IPC: G02B015/14

CPC classification number: G02B15/14 ,  G02B7/102

Abstract: A cam mechanism for a lens barrel includes an annular member which is linearly guided along an optical axis, and having a cam follower on an outer peripheral surface; a cam ring having a cam groove on an inner peripheral surface including a photographing section and an accommodation section, the cam follower being engaged in the cam groove; and a biasing device for biasing the annular member forward to normally press the cam follower against a front cam surface in the cam groove. A rear end portion of the cam groove is open at a rear end surface of the cam ring to serve as the accommodation section, and the cam follower is disengageable from the front cam surface in the cam groove against a biasing force of the biasing device when the cam follower is engaged in the accommodation section.

Abstract translation: 用于透镜镜筒的凸轮机构包括沿着光轴线性地引导并且在外周表面上具有凸轮从动件的环形构件; 凸轮环，其在包括拍摄部分和收纳部分的内周表面上具有凸轮槽，所述凸轮从动件接合在所述凸轮槽中; 以及偏置装置，用于向前偏压环形构件，以正常地将凸轮从动件抵靠在凸轮槽中的前凸轮表面。 所述凸轮槽的后端部在所述凸轮环的后端面开口，以作为所述收纳部，并且所述凸轮从动件能抵抗所述偏置装置的偏置力而与所述凸轮槽的前凸轮面脱离接合， 凸轮从动件接合在容纳部中。

公开(公告)号：US20040070849A1

公开(公告)日：2004-04-15

申请号：US10675993

申请日：2003-10-02

Applicant: PENTAX Corporation

Inventor： Hitoshi Tanaka

IPC: G02B007/02

CPC classification number: G02B7/10 ,  G02B7/20 ,  G02B7/22

Abstract: A light shielding structure of a lens barrel including an inner ring and an outer ring, wherein the inner ring includes a through cutout portion, the light shielding structure including an inner flange wall provided with the inner ring; a first annular groove formed on an inner surface of the inner flange wall; a second annular groove formed on an inner peripheral surface of the outer ring; and a light shield ring, wherein the light shield ring includes a cylindrical portion centered about the optical axis, and an outer flange portion which extends radially outwards from a rear end of the cylindrical portion so that the cylindrical portion and the outer flange portion and inserted into the first and second annular grooves, respectively.

Abstract translation: 1.一种透镜镜筒的遮光结构，包括内圈和外圈，其中所述内圈包括通孔切口部分，所述遮光结构包括设置有所述内圈的内凸缘; 形成在所述内凸缘壁的内表面上的第一环形槽; 形成在所述外圈的内周面上的第二环状槽; 以及遮光环，其中所述遮光环包括以光轴为中心的圆筒部分和从所述圆筒部分的后端径向向外延伸的外凸缘部分，使得所述圆筒部分和所述外凸缘部分插入 分别进入第一和第二环形槽。