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Lens barrel

A technology of lens barrel and lens barrel, which is applied in installation, optics, instruments, etc., can solve problems such as damage, high manufacturing cost, and reduced operability, and achieve the effect of improving optical characteristics and reducing costs

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

[0004] However, the holder ring of the lens device requires high-precision processing of the part connected to the lens barrel body, so there is a problem that the metal mold for resin molding is expensive and the manufacturing cost is high.
For this reason, there is a problem that the cost of the lens barrel is significantly increased by preparing various types of mount rings.
[0017] However, in Patent Document 5, since the connecting member is screwed to the lens barrel with a strong fastening force, there is a problem that the lens barrel body of the lens barrel is deformed.
Then, since the deformation occurs in the lens barrel main body, the sliding resistance between the operating ring and the lens barrel main body such as focusing and zooming becomes large, and operability deteriorates.
[0018] In addition, in Patent Document 5, when the connecting member is screwed to the lens barrel with a strong fastening force, there is a problem that the threads of the female thread on the side of the lens barrel body are damaged and the lens barrel body needs to be replaced.

Method used

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Experimental program
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no. 1 approach

[0050] figure 1 It is a side cross-sectional view mainly showing the structure of the lens barrel 10 attached to the surveillance camera. The lens barrel 10 described in the figure is generally composed of the following components, namely: a substantially cylindrical barrel body 12 (also referred to as a fixed barrel); mounted on the base end of the lens barrel body 12 and A connecting member 14 (also referred to as a lens holder) connected to the camera 18; an aperture device 16 inserted into the lens barrel body 12 from the peripheral surface side.

[0051] The barrel main body 12 is composed of a large diameter portion 12A on the distal end side and a small diameter portion 12B on the proximal end side, and the large diameter portion 12A and the small diameter portion 12B are integrally formed by 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 supported on the outer peripheral...

no. 2 approach

[0096] Figure 6 It is a side view showing the structure of the lens barrel 10 of the second embodiment of the present invention (the same components as those of the lens barrel of the first embodiment are given the same reference numerals).

[0097] Figure 6 The connecting member 14 shown is a member for connecting the lens barrel main body 12 and the camera 18, and is formed in a substantially cylindrical shape. A concave groove 70 is formed around the outer peripheral surface of the connecting member 14, and the bayonet of the camera 18 is engaged and connected to the concave groove 70. In addition, the method of connecting the camera 18 and the connecting member 14 is not particularly limited, and the camera 18 may be screwed to the connecting member 14. In addition, as the camera 18, a built-in type in which a CCD and a substrate are exposed can be used. At this time, a recess is formed in the coupling member 14, and the camera 18 is screwed in a state where the CCD of the...

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PUM

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Abstract

A lens barrel is provided and includes: a lens barrel main body; and a connecting member attached to the barrel main body and connected to a camera. The connecting member includes an optical filter unit, divided at a position of the optical filter unit and is constituted by a barrel side member and a camera side member.

Description

Technical field [0001] The present invention relates to a lens barrel, in particular to a lens barrel installed in a surveillance camera. Background technique [0002] The lens device of the monitoring camera is attached to the monitoring camera by fastening a bracket ring provided at the rear end portion of the lens barrel body in the optical axis direction to the monitoring camera body (see Patent Document 1). As for the holder ring of the lens device, it is necessary to prepare various shapes according to the shape and position of the CCD on the camera side, and the heat dissipation characteristics of the CCD. Therefore, in the past, a plurality of bracket rings with different shapes were prepared and selected and installed according to the specifications of the camera. [0003] [Patent Document 1] JP 2003-255210 A [0004] However, the holder ring of the lens device requires high-precision processing of the part connected to the lens barrel body. Therefore, the metal mold for...

Claims

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Application Information

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IPC IPC(8): G02B7/02H04N7/18
Inventor 西本直树
Owner FUJI PHOTO OPTICAL CO LTD