Iris device

A technology of aperture and aperture blades, which is applied in the direction of aperture, optics, shutter, etc., can solve the problems of large installation space of the drive system and the inability to realize small layout, and achieve the effect of high reliability and impact resistance reliability

Active Publication Date: 2012-01-11
NIPPON SEIMITSU SOKKI KK +1
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  • Abstract
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Problems solved by technology

[0006] However, although the aperture control can be performed with high precision because the aperture blade resolution higher than that of the stepping motor can be obtained when the gear reduction mechanism is disposed between the stepping motor and the rotating member, when For the technology described in Patent Document 2, when the gear reduction mechanism is composed of a helical shaft and an arc gear, etc., due to the influence of the cooperation relationship of the gear mechanism part, the installation space of the drive system including the stepping motor will become larger, and a small layout cannot be realized. The problem

Method used

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Embodiment Construction

[0044] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0045] Figure 1 to Figure 14 It is explanatory drawing of the aperture device of 1st Embodiment of this invention, figure 1 It is an exploded perspective view showing the overall configuration of the diaphragm device, figure 2 It is a perspective view showing the configuration of the aperture substrate, which is a main part of the same aperture device, image 3 It is a perspective view showing the configuration of the same parts, that is, the rotating parts, Figure 4 It is a perspective view showing a state in which a rotating member is attached to an aperture blade driving mechanism attachment portion on an aperture substrate, Figure 5 is expressed in Figure 4 A perspective view of the state where the intermediate gear is mounted on the upper side of the rotating part, Figure 6 is expressed in Figure 5 A perspective view of the state where the motor mounti...

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Abstract

The invention provides an iris device, which can enable a gear reducing mechanism to be arranged between a stepping motor and a rotary component driving iris shutters, and realize minimization of layout of a driving system comprising the stepping motor. The iris is adjusted through two iris shutters which reciprocatingly slide on opposite direction on an iris substrate, wherein the iris comprisesa rotary component driven to rotate by the stepping motor; a pair of driving pins which are arranged protrudedly on the rotary component and clamp respectively to a long hole formed on each iris shutter in a free sliding manner, so as to drive the iris shutter; a reducing gear mechanism, arranged between the rotary component and a rotary shaft of the stepping motor, composed of a motor pinion arranged on the rotary shaft of the stepping motor and an inner gear which is integrated with the rotary component and meshed with the motor pinion directly or indirectly through a middle gear.

Description

technical field [0001] The present invention relates to an aperture device for optical equipment such as video cameras, still cameras, and surveillance cameras. Background technique [0002] Among such diaphragm devices, there are those in which two diaphragm blades are arranged to slide freely along a straight line on a diaphragm substrate having an opening forming an optical path, and these are driven by a driving pin protruding from a rotating member. The two aperture blades reciprocate and slide in opposite directions to adjust the aperture of the optical path. Also, Patent Document 1 discloses a diaphragm device equipped with a stepping motor as a drive source for rotating a rotating member, and Patent Document 2 discloses a diaphragm device in which a gear reduction mechanism is provided between the stepping motor and the rotating member. device. [0003] When the gear reduction mechanism is disposed between the stepping motor and the rotating member, a resolution of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B9/02
CPCG03B9/06G03B9/14G03B9/24G03B9/26
Inventor 郡直道户丸崇原泽大辅
Owner NIPPON SEIMITSU SOKKI KK
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