公开(公告)号：US20030081948A1

公开(公告)日：2003-05-01

申请号：US10283282

申请日：2002-10-30

Applicant: PENTAX Corporation

Inventor： Hiroshi Nomura ,  Takamitsu Sasaki ,  Kazunori Ishizuka

IPC: G03B017/00

CPC classification number: G02B7/08

Abstract: A lens barrel includes an optical system having front and rear lens groups; a front lens frame which supports the front lens group; a rear lens frame which supports the rear lens group; a lens frame drive mechanism for driving the front and rear lens frames, and allows the rear lens frame to rotate relative to the front lens frame or move together in the optical axis direction while preventing relative rotation therebetween; a shutter unit having a shutter and a flexible printed wiring board, the shutter unit being relatively rotatable to, and movable together with, the rear lens frame in the optical axis direction; and a shutter unit guide mechanism for linearly guiding the shutter unit in the optical axis direction without rotating the shutter unit regardless of whether the rear lens frame rotates relative to the front lens frame.

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：US20030081325A1

公开(公告)日：2003-05-01

申请号：US10283040

申请日：2002-10-30

Applicant: PENTAX CORPORATION

Inventor： Hiroshi Nomura ,  Takamitsu Sasaki ,  Kazunori Ishizuka

IPC: G02B015/14

CPC classification number: G02B7/10

Abstract: A lens barrel includes a ring member having a cam groove formed on an inner peripheral surface thereof; a lens support ring positioned in the ring member and supported thereby to be rotatable with respect to the ring member, the lens support ring having a first cam follower which is engaged in the cam groove of the ring member; a biasing ring coupled to the lens support ring to be movable in an optical axis direction and to be non-rotatable with respect to the lens support ring, the biasing ring having a second cam follower which is engaged in the cam groove of the ring member; and a biasing device for biasing the lens support ring and the biasing ring in opposite directions to press the first and second cam followers against opposite guide surfaces of the cam groove.

Abstract translation: 镜筒包括：环形构件，其具有形成在其内周表面上的凸轮槽; 透镜支撑环，其定位在所述环形构件中并且由所述透镜支撑环相对于所述环构件可旋转，所述透镜支撑环具有接合在所述环构件的所述凸轮槽中的第一凸轮从动件; 偏置环，其耦合到所述透镜支撑环，以在光轴方向上可移动并且相对于所述透镜支撑环不可旋转，所述偏置环具有第二凸轮从动件，所述第二凸轮从动件接合在所述环构件的所述凸轮槽中 ; 以及用于沿相反方向偏置透镜支撑环和偏置环以将第一和第二凸轮从动件抵靠在凸轮槽的相对的引导表面上的偏置装置。

公开(公告)号：US20030081328A1

公开(公告)日：2003-05-01

申请号：US10283244

申请日：2002-10-30

Applicant: PENTAX CORPORATION

Inventor： Hiroshi Nomura ,  Takamitsu Sasaki ,  Kazunori Ishizuka

IPC: G02B015/14

CPC classification number: G02B7/102

Abstract: A lens barrel includes cam ring which is rotated about an optical axis to move a lens group in the optical axis direction, and a rotational ring which transfers a rotational motion to the cam ring. The rotational ring includes a rotation-transmission arm extending in the optical axis direction. The cam ring includes a bottomed engaging recess which is formed on an outer peripheral surface of the cam ring. The rotation-transmission arm is slidably inserted to be movable in the optical axis direction. The rotation-transmission arm and the engaging recess include a guide groove which extends parallel to the optical axis and a guide projection which is engaged in the guide groove, respectively or vice versa, the rotational ring transferring rotational motion thereof to the cam ring via engagement of the guide groove with the guide projection.

Abstract translation: 镜筒包括围绕光轴旋转以使透镜组沿光轴方向移动的凸轮环和将旋转运动传递到凸轮环的旋转环。 旋转环包括沿光轴方向延伸的旋转传递臂。 凸轮环包括形成在凸轮环的外周表面上的有底接合凹部。 旋转传递臂可滑动地插入以在光轴方向上移动。 旋转传递臂和接合凹部包括平行于光轴延伸的引导槽和分别与导向槽接合的引导突起，反之亦然，旋转环通过接合将其旋转运动传递到凸轮环 的导向槽与引导突起。

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：US20030156832A1

公开(公告)日：2003-08-21

申请号：US10368342

申请日：2003-02-20

Applicant: PENTAX Corporation

Inventor： Hiroshi Nomura ,  Takamitsu Sasaki

IPC: G03B017/00

CPC classification number: G03B17/00

Abstract: A retractable lens system includes a plurality of optical elements. All of the plurality of optical elements are positioned on a common optical axis when the retractable lens is in use. A removable element of the plurality of optical elements is moved to a removed position outside of the common optical axis, and the removable element and at least one element of the remaining elements of the plurality of optical elements are moved rearward, respectively, when the retractable lens system is in a retracted position.

Abstract translation: 可伸缩透镜系统包括多个光学元件。 当可伸缩透镜在使用中时，所有多个光学元件都位于共同的光轴上。 多个光学元件的可移除元件被移动到公共光轴外部的去除位置，并且可拆卸元件和多个光学元件的剩余元件的至少一个元件分别向后移动，当可伸缩 透镜系统处于缩回位置。

公开(公告)号：US20030081329A1

公开(公告)日：2003-05-01

申请号：US10283315

申请日：2002-10-30

Applicant: Pentax Corporation

Inventor： Hiroshi Nomura ,  Takamitsu Sasaki ,  Kazunori Ishizuka

IPC: G02B015/14

CPC classification number: G02B7/102

Abstract: A lens barrel includes a cam ring which is rotated about an optical axis to move a lens group in the optical axis direction via a cam groove formed on the cam ring, and a rotational ring which transfers a rotational motion to the cam ring. The rotational ring includes a rotation-transmission arm extending in the optical axis direction. The cam ring includes an engaging recess formed on an outer peripheral surface of the cam ring, and in which the rotation-transmission arm is slidably inserted to be movable in the optical axis direction, and an outer flange formed on an outer peripheral surface of the cam ring to form a slot penetrating therethrough in the optical axis direction between the outer flange and a bottom radial surface of the engaging recess so that the rotation-transmission arm is slidably fitted in the engaging recess through the slot.

Abstract translation: 镜筒包括：凸轮环，其绕光轴旋转以通过形成在凸轮环上的凸轮槽沿光轴方向移动透镜组;以及旋转环，其将旋转运动传递到凸轮环。 旋转环包括沿光轴方向延伸的旋转传递臂。 所述凸轮环包括形成在所述凸轮环的外周面上的接合凹部，并且所述旋转传递臂可滑动地插入以能够在光轴方向上移动;以及外凸缘，其形成在所述凸轮环的外周面上 凸轮环形成在所述外凸缘和所述接合凹部的底部径向表面之间沿光轴方向穿过其中的狭槽，使得所述旋转传递臂通过所述狭槽可滑动地装配在所述接合凹部中。

公开(公告)号：US20030081327A1

公开(公告)日：2003-05-01

申请号：US10283230

申请日：2002-10-30

Applicant: PENTAX Corporation

Inventor： Hiroshi Nomura ,  Takamitsu Sasaki ,  Kazunori Ishizuka

IPC: G02B015/14

CPC classification number: G02B7/021 ,  G02B7/04

Abstract: A lens barrel includes front and rear lens group frames, and a cam ring having a cam groove including a front-lens-group accommodation portion, a rear-lens-group-accommodation portion having a straight connecting portion connected to the front-lens-group accommodation portion, and an end portion. The front lens group frame is linearly guided and the rear lens group frame is relatively rotatably supportable and linearly guidably supportable. Rotation of the rear lens group frame is allowed when first and second followers are positioned in the front and rear-lens-group accommodation portions. When the cam ring is rotated from the accommodation portions, upon the rear lens group frame being switched from the relatively rotatable state to the linearly guidable state, the second follower rotates together with the cam ring while the second follower is positioned in the rear-lens-group accommodation portion or in the vicinity of the straight connecting portion.

Abstract translation: 透镜镜筒包括前透镜组框架和后透镜组框架，以及具有凸轮槽的凸轮环，凸轮槽包括前透镜组容纳部分，后透镜组容纳部分，其具有连接到前透镜组容纳部分的直连接部分， 组合部分和端部。 前透镜组框架被线性引导，后透镜组框架相对可旋转地支撑并且线性地可引导地支撑。 当第一和第二从动件位于前透镜组容纳部和后透镜组容纳部中时，允许后透镜组框的旋转。 当凸轮环从容纳部分旋转时，在后透镜组框架从相对可旋转状态切换到线性引导状态时，第二从动件与凸轮环一起旋转，而第二从动件位于后透镜 - 群容纳部分或直线连接部分附近。