Displacement detection device and lens barrel

Details Displacement detection device and lens barrel Displacement detection device and lens barrel

2006-09-26

2006-09-26

Perkey, W. B. (Department: 2851)

Photography

Having variable focal length of camera objective

Power zoom

C396S133000, C324S207210, C324S207250, C341S015000

Reexamination Certificate

active

07113697

ABSTRACT:
A displacement detection device which detects a displacement of a movable member which is provided so as to be displaceable with respect to a fixed member, comprises: a scale that is provided as a unit with the movable member; a displacement detection section that detects a displacement of the scale; a support member that supports the displacement detection section in a state in which the displacement detection section is able to shift in a direction which is substantially perpendicular to a contact plane where the displacement detection section contacts with the scale at a contact position between the displacement detection section and the scale and in which shifting in a direction other than the direction substantially perpendicular to the contact plane is restricted; and a pressure application member that applies a pressure to the displacement detection section towards the scale.

REFERENCES:
patent: 5146071 (1992-09-01), Ookubo et al.
patent: 5859733 (1999-01-01), Miyano et al.
patent: 6263163 (2001-07-01), Sasaki et al.
patent: A 2-236120 (1990-09-01), None
patent: U 4-127506 (1992-11-01), None
patent: A 7-128566 (1995-05-01), None
patent: A 7-324946 (1995-12-01), None
patent: A 2000-205808 (2000-07-01), None
patent: A 2001-330470 (2001-11-01), None

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