Lens barrel

A technology of lens barrel and lens barrel, which is applied in the direction of installation, aperture, optics, etc., can solve the problems of bad influence of focusing or zooming, fixed pins, incorrect rotation angle of the operating ring, etc., achieves low miniaturization and improves assembly Effect

Active Publication Date: 2006-11-01
FUJI PHOTO OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the conventional lens barrel, when the pin for restricting rotation is screwed into the operation ring, there is a danger that the pin will be fixed in an inclined state.
If the pin is fixed obliquely, the operating angle of the operating ring will not be correct, which will cause a problem of bad influence on focusing or zooming.
[0006] In addition, the conventional lens barrel needs pins or grooves for restricting rotation, so there are problems such as increasing the size of the lens barrel and increasing the cost of the lens barrel.

Method used

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Embodiment Construction

[0027] Hereinafter, preferred embodiments of the lens barrel according to the present invention will be described with reference to the drawings.

[0028] figure 1 It is a side cross-sectional view showing the structure of a lens barrel 10 mainly mounted on a monitoring camera. The lens barrel 10 shown in the same figure is mainly composed of: a substantially cylindrical lens barrel body 12 (also called a fixed barrel); The base end is connected to the camera 18 , and the diaphragm device 16 is inserted into the lens barrel main body 12 from the peripheral surface side to be attached.

[0029] The barrel main body 12 is composed of a large-diameter portion 12A on the distal side and a small-diameter portion 12B on the proximal side, and the large-diameter portion 12A and the small-diameter portion 12B are integrally molded with resin. The focus ring 20 is rotatably supported on the outer peripheral surface of the large-diameter portion 12A, and the zoom ring 30 is rotatably ...

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Abstract

A lens barrel is provided and includes a barrel main body; lens frames supported by the barrel main body so as to be movable in the direction of an optical axis; a focus ring and a zoom ring which are rotatably supported by the barrel main body and move the lens frames in the direction of the optical axis; and a diaphragm device attached to the barrel main body. The focus ring and the zoom ring come into contact with a rotation regulatory section of the diaphragm device, whereby rotation of the focus ring and rotation of the zoom ring are regulated.

Description

technical field [0001] The invention relates to a lens barrel, in particular to a lens barrel installed in a monitoring camera. Background technique [0002] On the lens barrel of a surveillance camera that manually performs focusing operations or zooming operations, an operation ring such as a focus ring or a zoom ring is rotatably provided on the outer periphery of the lens barrel body. By rotating the operation ring, focusing or zooming is performed. Zooming (for example, refer to Patent Document 1). [0003] A lens barrel having such an operation ring is provided with rotation limiting means for limiting the rotation range of the operation ring. The rotation restricting means is composed of, for example, a rotation restricting pin protruding from the operation ring and a groove of the lens barrel body in which the pin is engaged, and the rotation range of the operation ring is restricted by the pin contacting the end of the groove. Usually, the rotation limiting pin is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/02G03B9/02H04N7/18
CPCG02B7/10G03B11/00G03B17/44
Inventor 西本直树
Owner FUJI PHOTO OPTICAL CO LTD
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