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Diaphragm device of lens

An aperture and lens technology, applied in apertures, optics, optical components, etc., to improve convenience and comfort, ensure operation, and eliminate undesirable conditions

Active Publication Date: 2013-07-03
COSINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if only the tactile feeling can be eliminated without changing the operability (operating feeling), the user's convenience and comfort can be further improved, but the existing lenses cannot meet the above requirements.

Method used

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  • Diaphragm device of lens
  • Diaphragm device of lens
  • Diaphragm device of lens

Examples

Experimental program
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Embodiment Construction

[0034] Next, best embodiments according to the present invention will be listed and described in detail based on the drawings. In addition, the drawings do not limit the present invention, but are for facilitating understanding of the present invention. Also, in order to avoid ambiguity of the invention, detailed descriptions of well-known parts are omitted.

[0035] First, in order to facilitate the understanding of the aperture device 1 according to the present embodiment, a general configuration of the lens L including the aperture device 1 is referred to figure 1 Be explained.

[0036] figure 1The lens L shown in , for example, is a replacement lens that can be used in a digital camera such as a single-lens reflex camera. Also, the assumed digital camera has a video camera function in addition to the single-lens reflex camera function.

[0037] In the lens L, reference numeral 2 denotes a lens barrel. The lens barrel 2 includes a fixed cylindrical portion 2c including...

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PUM

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Abstract

Diaphragm device of a lens includes a click mechanism with a locking portion disposed in one of a stationary tube and a diaphragm setting ring, the locking portion having an elastically supported locking element, and an entrapment body disposed on the other of the stationary tube and the diaphragm setting ring. The entrapment body having an entrapment surface wherein a plurality of entrapment portions are formed for catching the locking element pressed against the entrapment surface at one of a plurality of aperture numbers when the diaphragm setting ring is turned. A mode select mechanism for switching between a click mode wherein the locking element is pressed against the entrapment surface and a non-click mode wherein a click function is deactivated with the locking element and the entrapment surface separated from each other by altering the position of at least one of the locking portion and the entrapment body.

Description

technical field [0001] The present invention relates to an aperture device of a lens. The aperture device of the lens has a click mechanism capable of click-engaging an aperture adjustment ring at a position corresponding to a predetermined aperture value (with a click sound). Background technique [0002] Conventionally, there are known iris devices for lenses such as the aperture ring disclosed in Patent Document 1 and the click-stop device disclosed in Patent Document 2: the aperture device of the lens has an aperture ring and a click mechanism (mechanism with a click sound). ), the aperture adjustment ring can adjust the aperture by being mounted in the fixed cylinder in a manner that can be rotated relative to the fixed cylinder of the lens barrel, and the click mechanism enables the aperture adjustment ring to be in contact with multiple Tap the position corresponding to each aperture value to engage. [0003] The aperture adjusting ring described in Patent Document 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B9/07
CPCG02B5/005G03B9/02
Inventor 黑岩洋平佐藤和广
Owner COSINA CO LTD
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