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公开(公告)号：US20210364889A1
公开(公告)日：2021-11-25
申请号：US17393673
申请日：2021-08-04
Inventor： Hiroyasu FUJINAKA
Abstract: A lens barrel includes a linear actuator that is disposed more to the outer peripheral side than the outer peripheral surface of a focus lens unit, and has two permanent magnets, a yoke unit, and a coil; and the focus lens unit that holds a focus lens and is driven back and forth along the optical axis direction. The permanent magnets are disposed substantially in parallel and spaced apart, with the same poles facing each other. The yoke unit includes a center yoke portion, a back yoke portion, and a yoke that magnetically couples the center yoke portion and the back yoke portion. The coil is wound around the center yoke portion, and its center is offset from the center of the two permanent magnets to the outer peripheral side with respect to the optical axis center of the focus lens.
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公开(公告)号：US20210333504A1
公开(公告)日：2021-10-28
申请号：US17229949
申请日：2021-04-14
Inventor： Hiroyasu FUJINAKA
Abstract: A lens drive unit 10 comprises permanent magnets 215a and 215b, a yoke 211, and a coil 210. The yoke 211 has center yoke portions 221a and 222a, a back yoke portion 231 and a connect yoke portion that magnetically joins the center yoke portions 221a and 222a and the back yoke portion 231. The coil 210 is wound so as to surround part of the center yoke portions 221a and 222a. The height of a surface of the center yoke portions facing the permanent magnets in an orthogonal direction to the optical axis direction is such that the height near the middle part in the optical axis direction is smaller than the height near the two ends in the optical axis direction.
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Patent Agency Ranking
公开(公告)号：US20210157089A1
公开(公告)日：2021-05-27
申请号：US17058252
申请日：2019-06-10
Inventor： Hiroyasu FUJINAKA
Abstract: A lens barrel (10) comprises a holding frame (51); a guide pole (53); a focusing lens unit (52) that is slidably guided by the guide pole (53) and moves in an axial direction; an actuator that moves the focusing lens unit (52) in the axial direction relative to the holding frame (51); and leaf springs (55) that support the guide pole (53) so as to allow movement in the axial direction relative to the holding frame (51), at an amplitude smaller than the stroke of the focusing lens unit (52).
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公开(公告)号：US20240272450A1
公开(公告)日：2024-08-15
申请号：US18405551
申请日：2024-01-05
Inventor： Hiroyasu FUJINAKA
Abstract: A lens unit 20 includes a second lens group L2, an aperture unit 22, a frame body 21a, and a coil 23. The aperture unit 22 is disposed along the optical axis AX direction of the second lens group L2 with respect to the second lens group L2. The second lens group L2 is attached to the frame body 21a. The coil 23 is attached to the frame body 21a, is disposed so as to sandwich the aperture unit 22 between the coil 23 and the second lens group L2 in the optical axis AX direction, and is included in a linear motor 30 that drives the second lens group L2 and the frame body 21a back and forth in the optical axis AX direction.
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公开(公告)号：US20170139180A1
公开(公告)日：2017-05-18
申请号：US15418959
申请日：2017-01-30
Inventor： Hiroyasu FUJINAKA , Toshiyuki NAKADA , Tetsuya UNO
CPC classification number: G02B7/10 , G02B7/102 , G02B15/16 , G02B27/646
Abstract: A lens barrel in which a lens can be moved in a direction parallel to an optical axis includes: a first frame having a cam follower and a cam follower base that holds the cam follower; and a second frame that has a cam groove engageable with the cam follower. The first frame and the second frame are moved relatively to each other along the optical axis. The cam follower base has a first end connected to the main body of the first frame via at least one thin portion, and a second end not connected to the main body. The thin portion is formed such that a thickness of the thin portion in a radial direction of the lens barrel is smaller than that of the cam follower base.
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公开(公告)号：US20160246032A1
公开(公告)日：2016-08-25
申请号：US15145191
申请日：2016-05-03
Inventor： Tetsuya UNO , Atsushi HASEGAWA , Manabu KOBAYASHI , Hiroyasu FUJINAKA
CPC classification number: G02B7/10 , G02B7/04 , G02B13/009 , G02B27/646 , G03B3/10 , G03B5/00 , G03B17/04 , G03B2205/0053 , H04N5/225 , H04N5/2254 , H04N5/23287
Abstract: A lens barrel includes at least one lens, the optical axis of the lens; the first frame (the fixed frame 900) having the first restricting portion (901, 902) and having an approximately cylindrical shape about the optical axis; the second frame (1000) having the cam groove (1036) and having an approximately cylindrical shape about the optical axis; the third frame (510) having the guide portion (511) which restricts inclination thereof with respect to the first contact portion (514) and the optical axis and having an approximately cylindrical shape about the optical axis; the drive arm (520) having a cam follower (523), the second restricting portion (524, 525) and the second contact portion (526), and having an approximately arcuate shape constituted of a portion of a circular cylinder about the optical axis or an approximately plate shape; the guide shaft (601) for guiding the guide in a movable manner in the optical axis direction; and the spring (603). The first restricting portion engages with the second restricting portion. The cam engages with the cam groove (1036). The drive arm moves approximately parallel to the optical axis due to the relative rotation of the second with respect to the first frame, the third is biased by the thus bringing the first contact portion and the second contact portion into contact with each other, and the third frame moves in the optical axis direction in an interlocking manner with the drive with the inclination of the guide being restricted by the guide.
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公开(公告)号：US20150124331A1
公开(公告)日：2015-05-07
申请号：US14597285
申请日：2015-01-15
Inventor： Hiroyasu FUJINAKA
CPC classification number: G02B7/10 , G02B7/022 , G02B7/102 , G02B27/646
Abstract: A lens barrel includes a cam frame, a zoom motor unit driving the cam frame to rotate, and a fifth group unit engaging with the cam frame through a fifth cam follower. The cam frame is provided with an internal gear engaging with the zoom motor unit, and a fifth cam groove engaging with the fifth cam follower. The fifth cam groove is continuous with a tooth space formed between two adjacent teeth of the internal gear. The fifth cam follower is smaller than the tooth space to pass through the tooth space.
Abstract translation: 镜筒包括凸轮框架，驱动凸轮框架旋转的变焦马达单元，以及通过第五凸轮从动件与凸轮框架接合的第五组单元。 凸轮框架设置有与变焦电动机单元接合的内齿轮，以及与第五凸轮从动件接合的第五凸轮槽。 第五凸轮槽与形成在内齿轮的两个相邻齿之间的齿间隔连续。 第五凸轮从动件小于通过齿空间的齿空间。
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