Lens housing having aperture device

Details Lens housing having aperture device Lens housing having aperture device

2000-02-24

2001-11-27

Epps, Georgia (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S699000

Reexamination Certificate

active

06324019

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a lens housing having an aperture device; particularly, the invention relates to a structure thereof.
2. Description of the Related Art
Conventionally, a lens housing having a flare-cutting aperture member for an optical apparatus, such as a camera, has been proposed according to Japanese Unexamined Patent Publication No. 10-010396. In the lens housing, the aperture member is provided in front of a predetermined lens so as to move backward and forward. When a lens other than the predetermined lens is move toward the predetermined lens by the amount exceeding a predetermined amount, the aperture member is driven toward the predetermined lens.
In the described lens housing, however, since the aperture member is supported so as to move backward and forward, there must be provided a supporting rod and a lens frame that are dedicated for slidably supporting the aperture member. This complicates the configuration, thereby providing unavoidable disadvantages such as that costs and the occupied space are forced to increase.
SUMMARY OF THE INVENTION
In order to solve the problems described above, an object of the present invention is to provide a lens housing having an aperture device that allows reduction in the number of configuration components and in the occupied space, thereby providing advantages in cost reduction and miniaturization.
To these end, according to one aspect of the present invention, there is provided a lens housing including an aperture device, having axial guide members for driving an optical member straight, and an aperture member supported by the axial guide members. In this configuration, the optical member is driven axially according to the axial guide members.
According to another aspect of the present invention, there is provided a lens housing including an aperture device, an optical element, axial guide members [provided directly in] attached to the optical element for guiding the optical element [straight] axially, and an aperture member supported by the axial guide members. In this configuration, the optical element is driven axially according to the axial guide members.


REFERENCES:
patent: 5373397 (1994-12-01), Satoh et al.
patent: 5583595 (1996-12-01), Hara et al.
patent: 5933285 (1999-08-01), Sato et al.
patent: 6198578 (2001-03-01), Iwasa et al.
patent: 6204977 (2001-03-01), Iwasa
patent: 10-10396 (1998-01-01), None

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