Focal-plane shutter and imaging device
AssigneeNidec Copal Corporation
InventorsKenta Kawakami, Ushio Uemura
Life of this patent
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Abstract
Provides a focal-plane shutter comprising: a base plate that has an opening portion for exposure; a blade group for opening and closing the opening portion; an arm that is linked to a blade group; and a driving mechanism portion, linked to the arm, for driving the blade group through the arm, wherein: the blade group and the arm are linked through a coupling plated with a metal crystallized structure with crystallization degree of no less than 99%. This focal-plane shutter can improve the wear durability of a coupling for linking a blade group and an arm. This can prevent the production of wear debris, and prevent the coupling from becoming brittle through wear, even given repeated operations.
Claims8
A focal-plane shutter comprising:
- a base plate that has an opening portion for exposure;
- a blade group opening and closing the opening portion;
- an arm that is linked to a blade group;
- and
- a driving mechanism portion, linked to the arm, driving the blade group through the arm, wherein:
- the blade group and the arm are linked through a coupling plated with a metal crystallized structure with crystallization degree of no less than 99%.
Dependencies are inferred from the claim text.