Shutter-driving device combined with a diaphragm

Abstract

Provided is a shutter driving device in common use as a diaphragm in which thickness reduction and miniaturization are possible and a diaphragm operation and driving of an ND filter can be performed by one driving source. The shutter driving device in common use as the diaphragm is equipped with a base member 2 having a prescribed thickness, an aperture 2a having a prescribed aperture diameter formed through the base member and a plurality of optical adjusting members 9 which close the aperture 2a or adjust the amount of aperture by driving of a driving source 1. The base member 2 is so constituted that the ND filter 10 capable of adjusting the intensity of the light passing the aperture 2a can be supported by the same. The ND filter 10 is so constituted that its movement is locked in a non-shielding state of not shielding the aperture 2a while the optical adjusting members 9 open the aperture 2a and that in the non-shielding state the optical adjusting members 9 are unlocked in synchronization with the operation of closing the aperture 2a and attain the shielding state of shielding the aperture 2a.

Description

technical field [0001] The present invention relates to a kind of shutter driving device that doubles as an aperture, can double as an aperture in a digital movie camera (digital movie camera) or a digital still image camera (digital still camera) etc., and can adjust the intensity of light (light quantity) ). Background technique [0002] For example according to Figures 9 to 14 A shutter driving device that doubles as a diaphragm and has an ND filter that also functions as a diaphragm used in a conventional digital moving camera, digital still camera, etc. will be described. [0003] Conventional shutter drive devices that double as apertures, such as Figure 9 As shown, a filter base 52 having a circular opening 51 a is stacked under the shutter base 51 forming a circular opening 51 a, and is disposed between the filter base 52 and the shutter base 51. The first blade body 53 and the second blade body 54 . [0004] The first blade body 53 is formed with a triangular a...

AI Technical Summary

Problems solved by technology

[0020] However, the above-mentioned conventional shutter driving device that doubles as an aperture requires the first and second two driving sources 55, 60, so there is a risk of increasing power consumption and shortening the battery life.

In addition, since the first driving power supply 55 and the second driving power supply 56 are arranged above and below the shutter base plate 51, there is a portable digital moving image device in which the shutter device for a conventional camera is enlarged and a shutter driving device serving as an aperture is assembled. Difficult miniaturization problems such as still cameras and digital still cameras

[0021] In addition, since the first driving power supply 55 and the second driving power supply 56 are provided, there are problems that the number of parts increases, the assembly is complicated, and the cost is high.

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