Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Hiroyasu Fujinaka

Tetsuya Uno

Atsushi Hasegawa

Shigeru Otsuka

Manabu Kobayashi

Mikio Umehara

Koji Kuyama

Shigeru Yoshida

Noriyoshi Sato

Toshiyuki Nakada

Yoshiaki Fukuda

Toshio Uehara

Kazuhito Itakura

Chiaki Yamamoto

Akio Konishi

Takumi Kuwahara

Koichiro Hirabayashi

Yukihiro Okada

Fumio Shinano

Kenichi Miyamori

Shizuka Yokote

Hiroyoshi Teshima

Makoto Umeda

Kazuo Shibukawa

Miyuki Furuya

Kumio Masuda

Kouji Kuyama

Itaru Enguchi

Hideaki Kawane

Ryo Miyazawa

Wataru Yamazaki

Hirotsugu Yabuta

Takashi Koike

A lens barrel () comprises a holding frame (); a guide pole (); a focusing lens unit () that is slidably guided by the guide pole () and moves in an axial direction; an actuator that moves the focusing lens unit () in the axial direction relative to the holding frame (); and leaf springs () that support the guide pole () so as to allow movement in the axial direction relative to the holding frame (), at an amplitude smaller than the stroke of the focusing lens unit ().

Lens barrel and imaging device comprising same

A lens drive unitcomprises permanent magnetsand, a yoke, and a coil. The yokehas center yoke portionsand, a back yoke portionand a connect yoke portion that magnetically joins the center yoke portionsandand the back yoke portion. The coilis wound so as to surround part of the center yoke portionsand. 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.

Lens drive unit and lens barrel comprising same

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.

Lens barrel

A focusing unit () comprises a linear motor driven in two phases, and comprises a two-phase coil () and a drive magnet () that is disposed along the drive direction at a position opposite the two-phase coil (). The winding width of the coils () in the portion opposite the drive magnet () is within an electrical angle range of 120&#xb0;&#xb1;7.7&#xb0;, the average width of the coil at the portion opposite the drive magnet () is within an electrical angle range of 144&#xb0;&#xb1;4.6&#xb0;, and the pitch between the two phases of coil () is an electrical angle of 90&#xb0;+180&#xb0;&#xd7;n (n is an integer of 0 or more).

Linear motor, and lens barrel and imaging device equipped with same

The lens barrel disclosed herein comprises cam pin (, and) fixed and supported by a lens holding frame (); a biasing pin () that is biased and supported near one cam pin () of the lens holding frame (); and a cam frame () that has cam grooves that engage with each of the cam pins (, and) and the biasing pin (). The cam groove () that engages with the biasing pin () engages with the biasing pin () on one side surface in the optical axis direction, and the cam groove () that engages with the cam pin () near the biasing pin () engages with the cam pin () on the side surface on the opposite side in the optical axis direction from the side surface that engages with the biasing pin ().

A lens barrelcomprises a holding frame, a guide polesupported by the holding frame, a focus lens unitthat moves along the guide pole, a first actuator (a yoke, a coil, and a driving magnet) that relatively moves the focus lens unitalong the guide polewith respect to the holding frame, and a second actuator (a gearand a stepping motor) that rotationally drives the guide polearound the axis.

Lens barrel and imaging device equipped with same

There is provided a lens barrel in which is mounted an actuator of a larger size than in a lens barrel of the same size, and with which a lens having a larger mass can be driven. A lens barrelcomprises a linear actuatorthat 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 unitthat holds a focus lensand is driven back and forth along the optical axis direction. The permanent magnetsare 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 yokethat magnetically couples the center yoke portionand the back yoke portion. The coilis wound around the center yoke portion, and its center is offset from the center of the two permanent magnetsto the outer peripheral side with respect to the optical axis center of the focus lens

A lens barrel includes a lens frame unit movable along an optical axis, a guide pole configured to guide the lens frame unit along the optical axis of the lens frame unit, a first lens frame holding one end of the guide pole, a guide cover held by the first lens frame, and a fastening member fastening the guide cover to the first lens frame. The guide cover includes a protruding part holding the other end of the guide pole, and protruding along the optical axis. The fastening member fastens the guide cover to the first lens frame through the protruding part.

Lens barrel and image-capturing device

A lens barrel includes at least one lens, the optical axis of the lens; the first frame (the fixed frame) having the first restricting portion () and having an approximately cylindrical shape about the optical axis; the second frame () having the cam groove () and having an approximately cylindrical shape about the optical axis; the third frame () having the guide portion () which restricts inclination thereof with respect to the first contact portion () and the optical axis and having an approximately cylindrical shape about the optical axis; the drive arm () having a cam follower (), the second restricting portion () and the second contact portion (), 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 () for guiding the guide in a movable manner in the optical axis direction; and the spring (). The first restricting portion engages with the second restricting portion. The cam engages with the cam groove (). 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.

Provided is an actuator that increases thrust while reducing mass of a magnetic field generating member including a magnet and a yoke, compared to conventional actuators. An actuator in the present disclosure includes a magnetic field generating member having a multipole-magnetized magnet and a yoke disposed on a first surface of the multipole-magnetized magnet, and a coil member provided in a position confronting a second surface of the multipole-magnetized magnet. The yoke is formed of a member narrower in width than the first surface of the multipole-magnetized magnet.

Actuator and lens barrel with actuator

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.

A lens barrel according to a first aspect of the present disclosure includes the lens frame which holds the lens, and the holding frame which holds the lens frame in a state where the lens frame is movable in a plane orthogonal to the optical axis. A biasing means which generates a force in the direction that the lens frame is lifted up against the gravity is provided to at least the holding frame out of the holding frame and the lens.

A lens barrel includes: a base frame having a first through-hole; an adhesion plate having a second through-hole; a lens frame disposed within the base frame; and an adhesively fixing portion fixing the lens frame to the base frame, wherein the adhesion plate is disposed in a vicinity of the first through-hole and movably held by the base frame, the lens frame includes a projection projecting radially relative to an optical axis of the lens barrel, the projection being engaged with the second through-hole and inserted in the first through-hole, the projection is movable within the first through-hole so as to change a position of the lens frame relative to the base frame, and the adhesively fixing portion is disposed in the first through-hole.

Growing community of inventors

Osaka, Japan

Hiroyasu Fujinaka