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Motor and light modulator

A technology for light adjustment, electric motors, used in electromechanical devices, electric components, synchronous motors with stationary armatures and rotating magnets, etc.

Inactive Publication Date: 2006-09-20
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, among the motors proposed in JP-A-7-213041 and JP-2000-50601, etc., such as Figure 11 As shown, the magnetic fluxes generated in the respective coils are not necessarily all effectively directed toward the magnet 304, but also toward the direction of the overflow from the magnet.

Method used

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  • Motor and light modulator
  • Motor and light modulator
  • Motor and light modulator

Examples

Experimental program
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Embodiment Construction

[0030] The invention will be described below on the basis of the illustrated embodiments.

[0031] figure 1 ~ FIGS. 5A to 5C are diagrams showing a shutter driving device in one embodiment of the light quantity adjusting device of the present invention. figure 1 is an exploded perspective view of the shutter drive mechanism, figure 2 is an axial sectional view of the shutter drive in its assembled state, image 3 It is a sectional view of the one-way clutch mentioned later, Figure 4 5A to 5C are plan views showing the relationship between the clutch member 14 and the output member 13 to be described later, and are diagrams for explaining the rotational operation of the magnet of the shutter driving device.

[0032] in from figure 1 To Fig. 5A to 5C, 1 is the magnet as rotor, makes the shape (annular shape) of hollow disk, takes the center of the circle as axis, remains rotatable, simultaneously, at least with respect to the vertical plane 1a of rotating shaft (namely ...

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Abstract

The present invention aims at providing a motor having short axial length and large torque. For an object concerned, a motor according to the present invention has the structure of comprising an approximately disk-shaped rotor that is dividedly magnetized so that at least one plane may become a plurality of polarities in a rotational direction, a coil that has an inner circumferential surface facing an outer circumferential surface of the rotor, or an outer circumferential surface facing an inner circumferential surface of the rotor, a first magnetic pole portion that extends in a radial direction of the rotor and is magnetized by the coil while facing a surface of the rotor, and a second magnetic pole portion that is magnetized by the rotor.

Description

technical field [0001] The present invention relates to a motor and a light quantity adjusting device, particularly a motor with a reduced length in the direction of the rotating shaft of a rotor, and a light quantity adjusting device using the motor as a driving source for a blade member of a shutter or aperture value adjusting mechanism. Background technique [0002] The operation related to the exposure of a digital camera is generally performed as follows. [0003] First, power is turned on before shooting, the imaging element is in an active state, the shutter blade is kept at the open position, and the beam of light in the field of view to be photographed is in the state of reaching the imaging element. The imaging element receiving the light beam of the field of view to be photographed performs photoelectric conversion, repeatedly stores, discharges and transfers charges, and the image monitor displays the image of the field of view to be photographed according to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27H02K1/12H02K21/14H02K29/00G02B7/04G03B9/02G03B7/10G03B9/04G03B9/08G03B9/10G03B9/26H02K7/116H02K21/24H02K33/16
CPCG03B7/10H02K7/116H02K21/145H02K21/24H02K2201/12H02K29/00
Inventor 青岛力
Owner CANON KK