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Lens barrel and imaging device




Title: Lens barrel and imaging device.
Abstract: The lens barrel includes a first supporting frame, an optical element, a second supporting frame, and a guide shaft. The first supporting frame has a first base portion and a first seat portion that projects in a first direction from the first base portion. The second supporting frame supports the optical element and has a first bearing portion. The guide shaft is coupled to the first seat portion and inserted into the first bearing portion. The first seat portion is disposed within the circumference of the guide shaft when viewed in the first direction. ...


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USPTO Applicaton #: #20120307383
Inventors: Atsushi Hasegawa, Tetsuya Uno


The Patent Description & Claims data below is from USPTO Patent Application 20120307383, Lens barrel and imaging device.

CROSS-REFERENCE TO RELATED APPLICATIONS

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This application is a divisional application of U.S. patent application Ser. No. 12/835,748, filed on Jul. 14, 2010. The entire disclosure of U.S. patent application Ser. No. 12/835,748 is hereby incorporated herein by reference.

BACKGROUND

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1. Technical Field

The technology disclosed herein relates to an imaging device and a lens barrel used with the imaging device.

2.Background Information

Imaging devices that make use of a CCD (charge coupled device) sensor, a CMOS (complementary metal-oxide semiconductor) sensor, or another such imaging sensor have become extremely popular in recent years. Examples of such imaging devices include digital still cameras and digital video cameras. These imaging devices are generally equipped with a lens barrel for forming an optical image of a subject on an imaging element. The type of lens barrel generally used is a telescoping lens barrel, which is usually stored inside the camera body when not being used to form an optical image of the subject.

SUMMARY

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One aspect of the technology disclosed herein is a lens barrel that comprises a first supporting frame, a second supporting frame, and a guide shaft. The first supporting frame includes a first base portion and a first seat portion that projects from the first base portion in a first direction. The second supporting frame is configured to support an optical element and includes a first bearing portion. The guide shaft is coupled to the first seat portion and inserted into the first bearing portion. When viewed in the first direction, the first seat portion is disposed within the outer circumference of the guide shaft.

BRIEF DESCRIPTION OF DRAWINGS

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Referring now to the attached drawings which form a part of this original disclosure:

FIG. 1 is an oblique view of a digital camera;

FIG. 2 is a cross section of a lens barrel (wide angle end);

FIG. 3 is a cross section of a lens barrel (telephoto end);

FIG. 4 is a cross section of a lens barrel (when retracted);

FIG. 5 is an exploded oblique view of a master flange and a third lens group unit;

FIG. 6 is a cross section of a master flange and a third lens group unit;

FIG. 7 is a cross section of a guide shaft and its surroundings;

FIG. 8 is a cross section along the VIII-VIII line in FIG. 7;

FIG. 9 is a cross section along the IX-IX line in FIG. 7;

FIG. 10 is a cross section of a guide shaft and its surroundings (another embodiment); and

FIG. 11 is a cross section of a guide shaft and its surroundings (another embodiment).

DETAILED DESCRIPTION

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OF EMBODIMENTS

Selected embodiments will now be explained with reference to the drawings. It will be apparent to those skilled in the art from this disclosure that the following descriptions of the embodiments are provided for illustration only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents.

The phrase “within the range of the outer shape of the guide shaft” means “within the outline of the guide shaft when viewed in the first direction”. The phrase “the first base portion is disposed within the range of the outer shape of the guide shaft” encompasses that the outer shape of the first base portion coincides with the outer shape of the guide shaft.

Configuration of Digital Camera

As shown in FIG. 1, a lens barrel 100 (an example of a lens barrel) is mounted on a digital camera 1 (an example of an imaging device). Examples of imaging devices include digital still camera and digital video cameras that make use of an imaging element. Examples of imaging elements include CCD image sensors and CMOS image sensors.

Overall Configuration of Lens Barrel

The overall configuration of the lens barrel 100 will be described. As shown in FIGS. 2 to 4, the lens barrel 100 comprises an optical system O, a fixed lens barrel 110 (an example of a first supporting frame), a moving lens barrel 120 disposed inside the fixed lens barrel 110, and a CCD unit 260 (an example of an imaging element).

The optical system O has a first lens group 140a, a second lens group 140b, and a third lens group 140c. The optical system O also an optical axis L defined by these lens groups. A direction parallel to the optical axis L will hereinafter also be called the optical axis direction. The optical axis direction is an example of a first direction.




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stats Patent Info
Application #
US 20120307383 A1
Publish Date
12/06/2012
Document #
File Date
12/31/1969
USPTO Class
Other USPTO Classes
International Class
/
Drawings
0




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20121206|20120307383|lens barrel and imaging device|The lens barrel includes a first supporting frame, an optical element, a second supporting frame, and a guide shaft. The first supporting frame has a first base portion and a first seat portion that projects in a first direction from the first base portion. The second supporting frame supports the |Panasonic-Corporation
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