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AssigneesFujinon Corporation, FUJIFILM Corporation
InventorsYoshihiro Ito, Yoji Naka, Takehiko Senba, Haruo Onozuka, Mitsuo Manabe
Estimating the term…
A stepping motor comprises first to third coil portions and first to second rotors. The first rotor has a cylindrical shape and a circumferential surface thereof is magnetically-polarized so as to alternately arrange south poles and north poles. The first rotor is disposed inside the first and second coil portions, and is rotated by magnetic fields generated at a time when the first and second coil portions are energized. The second rotor has a disk shape and a surface thereof is magnetically polarized so as to alternately arrange south poles and north poles. The second rotor is disposed such that edge areas of both surfaces thereof are interposed between the second and third coil portions. The second rotor is rotated by magnetic fields generated at a time when the second and third coil portions are energized.
A stepping motor comprising:
A lens device comprising a stepping motor for driving at least one of a movable lens and a light-amount variable member, which changes a size of an aperture for opening an optical path of said movable lens, said stepping motor including:
An imaging device comprising a lens device, which includes a stepping motor for driving at least one of a movable lens and a light-amount variable member, and a solid-state image sensor disposed behind said lens device, said light-amount variable member changing a size of an aperture for opening an optical path of said movable lens, said stepping motor comprising:
A lens device comprising a stepping motor for driving a first movable lens and a second movable lens, said stepping motor including:
An imaging device comprising a lens device, which includes a stepping motor for driving a first movable lens and a second movable lens, and a solid-state image sensor disposed behind said lens device, said stepping motor comprising:
A lens device comprising a stepping motor for driving a movable lens and a light-amount variable member, which changes a size of an aperture for opening an optical path of said movable lens, said stepping motor including:
An imaging device comprising a lens device, which includes a stepping motor for driving a movable lens and a light-amount variable member, and a solid-state image sensor disposed behind said lens device, said light-amount variable member changing a size of an aperture for opening an optical path of said movable lens, said stepping motor comprising:
A lens device comprising a stepping motor for driving a first movable lens, a second movable lens, a third movable lens and a light-amount variable member, which changes a size of an aperture for opening an optical path of said first, second and third movable lenses, said stepping motor comprising:
An imaging device comprising a lens device, which includes a stepping motor for driving a first movable lens, a second movable lens, a third movable lens and a light-amount variable member, and a solid-state image sensor disposed behind said lens device, said light-amount variable member changing a size of an aperture for opening an optical path of said first, second and third movable lenses, said stepping motor comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
With stationary armatures and rotating magnets: with magnets rotating within the armatures
Stator cores with salient poles: having an annular coil, e.g. of the claw-pole type
Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits: magnetic cores, or permanent magnets…
Dynamo-electric machines
About 3 months of term left · ends 2 Feb 2027 (estimated)
Field of the Invention
The present invention relates to a hollow stepping motor in which a hollow rotor is rotated by magnetic fields generated in a fixed barrel, and further relates to a lens device and an imaging device using this stepping motor.
Description of the Related Art
The above objects and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments of the invention when read in conjunction with the accompanying drawings, in which:
FIG. 1 is a front perspective view of a camera-equipped cell-phone;
FIG. 2 is a rear perspective view of the camera-equipped cell phone;
With respect to the first embodiment of the present invention, a camera-equipped cell-phone loaded with a lens device is described below. In FIG. 1, the front of the camera-equipped cell-phone 10 is provided with an operating portion 16 for performing various operations, and a liquid-crystal display panel (LCD) 18 for displaying various images. Moreover, a speaker 20 and a microphone 22 to be used at a time of a phone call are also provided. In FIG. 2, the rear of the camera-equipped cell-phone 10 is provided with a battery 24 for supplying an electric power. The battery 24 is detachably attached. In addition, a lens device 31 constituting an electronic camera 30 (see FIG. 8) is also provided. A taking lens 32 incorporated in the lens device 31 is exposed at the rear of the camera-equipped cell-phone 10.
The camera-equipped cell-phone 10 has a phone-call mode for making a call by using the speaker 20 and the microphone 22, and a camera mode for capturing a subject light, which is obtained through the taking lens 32, in an embedded memory 34 (see FIG. 8) as digital image data. The respective modes are switched by handling the operating portion 16. Further, by handling the operating portion 16, it is possible to input telephone numbers under the phone-call mode and to perform various operations of shutter release and so forth under the camera mode. The LCD 18 shows the images, which are stored in the embedded memory 34, and various information pictures of a menu picture and so forth. Additionally, the LCD 18 shows a so-called through image under the camera mode for the purpose of framing.
As shown in FIG. 3, the lens device 31 comprises a front cover 38 and a rear cover 40 so as to interpose a fixed barrel 36 between them. The taking lens 32 is exposed through an opening of the front cover 38. The taking lens 32 is contained in a movable barrel 42 and refracts the subject light entering along an optical axis 51 to form an image on a light-receiving surface of a CCD 48 built in the rear cover 40.