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Aperture device

A diaphragm and diaphragm blade technology, applied in electromechanical devices, installation, aperture and other directions, can solve the problems of large thickness of diaphragm devices and shortened size of actuators, and achieve the effect of achieving structure, easy installation and stable support

Inactive Publication Date: 2011-12-07
NIPPON SEIMITSU SOKKI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the conventional aperture device described in the above-mentioned Patent Document 1, since the bobbin for winding the coil is used, and the shaft end of the rotor is supported by the bearing arranged in the bobbin, the actuation There is a limit to the shortening of the size in the direction of the rotor axis of the diaphragm, and as a result, there is a problem that the thickness of the diaphragm device as a whole is too large.

Method used

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Embodiment Construction

[0022] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0023] figure 1 is a side sectional view of the outline of the aperture device in the embodiment, figure 2 is a plan view showing the state of the diaphragm device before the actuator is installed, image 3 is a bottom view showing the state of the aperture device before the actuator is installed, Figure 4 is a top view of the portion of the aperture device that houses the actuator, Figure 5 is the composition diagram of the actuator, where (a) is a top view, (b) is a side sectional view, Figure 6 It is a structural diagram of the housing of the actuator, wherein (a) is a top view, (b) is a side sectional view, Figure 7 It is a bottom view of the actuator, wherein (a) is a diagram showing the state before the wiring board is mounted, and (b) is a diagram showing the state where the wiring board is mounted.

[0024] Such as Figure 1 ~ Figure 3 As shown, the d...

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Abstract

In the present invention, the reduction in thickness of the entire diaphragm device is achieved by shortening the dimension of the actuator in the rotor axis direction as much as possible. The aperture device has a base (11), aperture blades (30) arranged on the base (11), a rotary actuator (100) for driving the aperture blades, and the movement of the actuator is transmitted to the aperture. The transmission mechanism (120) of the blade. The actuator consists of: a bottomed cylindrical housing (110); two shaft ends (135, 134) are embedded in a bearing hole (19) formed on the base and a bearing hole (117) formed on the bottom wall of the housing. ) and rotatably supported in the housing in the rotor (130); the magnet (138) of the rotor induces a magnetic force to make the drive coil (140) that rotates the rotor. An avoidance hole (18) is provided to avoid interference between the base and the air-core coil so that the coil approaches the base side.

Description

technical field [0001] The present invention relates to an aperture device for optical devices such as video cameras, still cameras, and monitors. Background technique [0002] As such an aperture device, the device described in Patent Document 1 is known. [0003] This diaphragm device includes: a flat base (base plate) having an opening serving as an optical path, and diaphragm blades that are slidably provided on the base and can adjust the amount of light passing through the opening when being slidably driven. A rotary actuator (motor) installed on the base to drive the diaphragm blades to direct their own rotor axis towards the direction perpendicular to the base, and a transmission mechanism that transforms the rotation of the rotor into the sliding motion of the diaphragm blades, The actuator is composed of the above-mentioned rotor with magnets and a stator that imparts a rotational force to the rotor. The stator is formed by winding a coil around the outer circumfe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K33/18G02B7/00G03B9/02
CPCG03B9/02
Inventor 齐藤茂喜
Owner NIPPON SEIMITSU SOKKI KK