Displacement detection device and lens barrel
US7113697B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 6, 2002 |
| Grant date | Sep 26, 2006 |
| Priority date | — |
| Expiry date | Mar 1, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/245
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.