公开(公告)号：US20170235090A1

公开(公告)日：2017-08-17

申请号：US15584858

申请日：2017-05-02

Applicant: FUJIFILM Corporation

Inventor： Yukitaka TAKESHITA ,  Mitsuhiko OKA ,  Yuichi KAWANABE ,  Yi PAN ,  Shinji OTSUKA ,  Kazuyoshi AZEGAMI

IPC: G02B7/08 ,  G02B7/10 ,  H04N5/232 ,  G03B13/36 ,  G02B7/02 ,  H04N5/225

CPC classification number: G03B13/32 ,  G02B7/02 ,  G02B7/04 ,  G02B7/08 ,  G02B7/102 ,  G03B17/14 ,  H04N5/2254 ,  H04N5/23209 ,  H04N5/23212 ,  H04N5/23245 ,  H04N5/23296

Abstract: There is provided a lens barrel that can easily and reliably prevent an erroneous operation at the time of switching of a manual focus mode.A lens barrel body houses an imaging optical system including a focus lens. A focus operation ring rotates integrally with a first connection ring about an optical axis of the imaging optical system. A second connection ring is movable between an engagement position at which the second connection ring is engaged with the first connection ring and a cam ring and a disengagement position at which the second connection ring is not engaged with both of the first connection ring and the cam ring. A switching-operation ring is movable between a rotation-restriction position at which the switching-operation ring moves the second connection ring to the engagement position and a rotation-allowable position at which the switching-operation ring moves the second connection ring to the disengagement position.

公开(公告)号：US20190103798A1

公开(公告)日：2019-04-04

申请号：US16207213

申请日：2018-12-03

Applicant: FUJIFILM Corporation

Inventor： Yuichi KAWANABE

IPC: H02K41/035 ,  G02B7/09 ,  G03B13/36 ,  G03B5/00 ,  G02B27/64

Abstract: A yoke of a voice coil motor includes an outer yoke as a magnet holding portion and an inner yoke as a coil insertion portion. A magnet is fixed to the surface of the outer yoke facing the inner yoke. The inner yoke is inserted into a coil. Openings are provided toward both end positions of the outer yoke from a middle position of movement positions of the coil. The openings are formed to pass through the outer yoke. The outer yoke can be made lighter while a necessary thrust is ensured.

公开(公告)号：US20220121000A1

公开(公告)日：2022-04-21

申请号：US17564866

申请日：2021-12-29

Applicant: FUJIFILM Corporation

Inventor： Hiroyuki IWASAKI ,  Yuichi KAWANABE ,  Shinji OTSUKA

IPC: G02B7/09

Abstract: Provided is a lens barrel capable of improving stop accuracy. A roller support shaft (61) is attached to an outer peripheral portion of a cam cylinder (16). A torque applying roller (102) is rotatably supported by the roller support shaft (61). A biasing ring (104) is fitted to an outer peripheral portion of a second fixed cylinder (12B) and is held to be movable in an axial direction. The biasing ring (104) is biased by a biasing spring (106) and pressed to abut against the torque applying roller (102). In a case where the cam cylinder (16) is rotated, the torque applying roller (102) rolls along the biasing ring (104). A load torque is applied to the rotation of the cam cylinder (16) by frictional force generated between the torque applying roller (102) and the roller support shaft (61) due to the rotation of the torque applying roller (102).

公开(公告)号：US20200292780A1

公开(公告)日：2020-09-17

申请号：US16891236

申请日：2020-06-03

Applicant: FUJIFILM Corporation

Inventor： Takeya ABE ,  Kenji HOSHINO ,  Hideo KOBAYASHI ,  Yuichi KAWANABE

IPC: G02B7/04 ,  H02K41/035

Abstract: Provided are a lens barrel and an imaging device, with which it is possible to lock an optical member of which the movement in an optical axis direction is made free in a case where there is no electrification, particularly to hold the optical member in a locked state without use of electric power. A movable frame that holds a focus lens is driven in the optical axis direction by a linear motor. In a case where the movable frame is to be locked with the linear motor being not electrified, the movable frame (engagement portion) is caused to abut onto a restriction portion at an end portion of the movable range of the movable frame and a locking ring is caused to rotationally move to a locking position by an electric actuator. Accordingly, the movable frame is fixed by the restriction portion and a locking portion of the locking ring to become unable to move. The electric actuator includes a worm gear as a power transmission mechanism and it is possible to hold the locking ring at the locking position by means of an irreversible rotation function of the worm gear.

公开(公告)号：US20190265432A1

公开(公告)日：2019-08-29

申请号：US16408135

申请日：2019-05-09

Applicant: FUJIFILM Corporation

Inventor： Yuichi KAWANABE

IPC: G02B7/02 ,  G02B7/00 ,  H04N5/225

Abstract: A first rail 41 supports a first rolling body 45 so as to allow the first rolling body 45 to be rollable in a first direction parallel to an optical axis of a first focus lens. A second rail 42 supports a second rolling body 46 so as to allow the second rolling body 46 to be rollable in the first direction. The biasing mechanism 47 supports the first rolling body 45 so as to allow the first rolling body 45 to be movable in the first direction, and biases the first rolling body 45 toward the first rail 41. A third rail 43 is provided in parallel with the second rail 42. The third rail 43 supports a second rolling body 46 so as to allow the second rolling body 46 to be movable in the first direction.

公开(公告)号：US20170199347A1

公开(公告)日：2017-07-13

申请号：US15469580

申请日：2017-03-27

Applicant: FUJIFILM Corporation

Inventor： Yukitaka TAKESHITA ,  Mitsuhiko OKA ,  Yuichi KAWANABE ,  Yi PAN ,  Shinji OTSUKA ,  Kazuyoshi AZEGAMI

IPC: G02B7/04 ,  H04N5/232 ,  H04N5/225

CPC classification number: G02B7/04 ,  G03B3/10 ,  G03B13/34 ,  G03B2205/0046 ,  H04N5/2254 ,  H04N5/23209 ,  H04N5/23212 ,  H04N5/23245 ,  H04N5/23293

Abstract: An object of the invention is to provide a camera body of which a manual focus mode can be easily switched.A lens barrel includes an imaging optical system, a first operation ring, a second operation ring, and first and second sensors. The first sensor detects the rotation of the first operation ring and the rotation angle and the rotational direction of the first operation ring. The second sensor detects the angular position of the second operation ring. The imaging optical system includes a focus lens. A camera body includes a body control unit. The body control unit selectively executes a first manual focus mode in which the focus lens is moved according to the rotational direction and the rotation angle detected by the first sensor and a second manual focus mode in which the focus lens is moved according to the angular position detected by the second sensor.

公开(公告)号：US20190271825A1

公开(公告)日：2019-09-05

申请号：US16419618

申请日：2019-05-22

Applicant: FUJIFILM Corporation

Inventor： Yuichi KAWANABE

IPC: G02B7/02 ,  H04N5/225

Abstract: There are provided a lens guide device, a lens moving device, and an imaging apparatus that can accurately position a lens frame regardless of an attitude, such as an imaging direction. A first-rail supports a first-rolling-body so as to allow the first-rolling-body to be rollable in a first-direction parallel to an optical-axis of a first-focus-lens. A second-rail supports a second-rolling-body so as to allow the second-rolling-body to be rollable in the first-direction. A biasing-mechanism supports the first-rolling-body so as to allow the first-rolling-body to be movable in the first-direction, and biases the first-rolling-body toward the first-rail. A third-rail is provided in parallel with the second-rail. The third-rail supports the second-rolling-body so as to allow the second-rolling-body to be movable in the first-direction. Since the first-rail and the second-rail are moved and guided in a first direction by the first-rolling-body and the second-rolling-body, a lens frame is not inclined.

公开(公告)号：US20190103799A1

公开(公告)日：2019-04-04

申请号：US16207214

申请日：2018-12-03

Applicant: FUJIFILM Corporation

Inventor： Yuichi KAWANABE

IPC: H02K41/035 ,  G02B7/04 ,  G03B13/34 ,  G03B5/00 ,  G02B27/64

Abstract: A yoke of a voice coil motor includes an outer yoke as a magnet holding portion and an inner yoke as a coil insertion portion. A magnet is fixed to the surface of the outer yoke facing the inner yoke. The inner yoke is inserted into a coil. The coil is formed in a trapezoidal shape where an outer wire length as a wire length of an outer long side is shorter than an inner wire length as a wire length of an inner long side. Since the outer long side is made shorter than the inner long side, an opposite thrust caused by current flowing in the outer long side can be reduced. Accordingly, a reduction in the thrust of the coil is suppressed by as much as the reduced opposite thrust.