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Lens barrel

A lens barrel and lens technology, which is applied in the direction of instruments, installation, optics, etc., can solve problems such as lens eccentricity and distance changes between lenses, and achieve the effect of miniaturization and impact resistance

Active Publication Date: 2021-04-13
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As long as the total reaction force (F1+F2) is within the allowable range, the influence is small, but if the impact force is too large, such as falling from a high position, there is a metal cam follower that first receives the impact force There is concern that the deformation of the mounting part, etc., exceeds the elastic region and reaches the plastic region
If the mounting part of the metal cam follower is plastically deformed, the contact position between the cam follower and the cam groove changes, and there is a possibility that the distance between the lenses exceeds the allowable value and the lens is eccentric.
On the other hand, if it is desired to increase the rigidity of the mounting part of the cam follower in order to overcome the above-mentioned impact force, it will cause further enlargement of the lens barrel, which is not preferable.
Such a problem is especially likely to cause problems when the lens barrel is retracted into the camera body and the digital camera is dropped by mistake.

Method used

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Embodiment Construction

[0034] Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external view of a digital camera as an example of an imaging device including a lens barrel according to this embodiment. FIG. 1( a ) is a front view of the digital camera 1 , and FIG. 1( b ) is a rear view.

[0035] As shown in FIG. 1( a ), a digital camera 1 is composed of an imaging unit 2 having a lens barrel and an imaging element, and a camera body unit 3 .

[0036] The imaging unit 2 is composed of a lens barrel capable of zooming and a solid-state imaging element such as a CCD, and can convert the subject image formed through the lens barrel into an image signal by the solid-state imaging element.

[0037] The camera body 3 has an LCD display 6 composed of an LCD (Liquid Crystal Display), an EVF (Electronic View Finder: Electronic Viewfinder) 7, and an external device for connecting the digital camera 1 to a personal computer (not shown). The connect...

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Abstract

The present invention provides a lens barrel capable of ensuring the displacement of the lens with high precision while achieving miniaturization and ensuring impact resistance. When not shooting, instead of the pin (160) being in contact with the cam groove (132), and the pin (180) being in contact with the cam groove (134), the pin (150) is not in contact with the cam groove (131), and the pin (180) is in contact with the cam groove (131). (170) is not in contact with the cam groove (133), thus in the case of mistakenly causing the digital camera (1) to drop, the impact force is firstly contacted by the pin (160) and the cam groove (132), and the pin (180) Absorb with cam groove (134). As a result, collision contact between the pin (150) and the cam groove (131) or collision contact between the pin (170) and the cam groove (133) is suppressed, and high-precision zoom lens driving can be ensured even after being dropped.

Description

technical field [0001] The present invention relates to a lens barrel capable of realizing displacement in the optical axis direction of a lens. Background technique [0002] In a lens barrel installed in a digital camera capable of zooming and shooting, a cam follower provided on a moving frame holding a zoom lens is engaged with a cam groove formed on a cam barrel, and the moving frame and the cam barrel are relatively rotated, Accordingly, the optical axis direction displacement of the zoom lens is performed with high precision. [0003] However, for example, when a user accidentally touches a digital camera or the like placed on the edge of a table, it may be dropped to the floor or the like. At this time, due to the strong load generated by the inertia of the moving frame when it is hit by the fall, the cam follower will be pressed by the side of the cam groove under the action of this load and plastic deformation will occur. There are concerns about fluctuations in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/04
CPCG02B7/04
Inventor 本目成男
Owner KONICA MINOLTA INC