Patent ID: 8015716
Filing Date: 2011-09-13
Classification: B24B,G01B

Abstract:
1. An eyeglass frame shape measuring apparatus for measuring a shape of a rim of an eyeglass frame, comprising: a tracing stylus configured to be inserted into and move along a groove of the rim to detect a position of the rim in a moving radius direction of the tracing stylus and in a vertical direction perpendicular to the moving radius direction; a tracing stylus shaft including an upper part to which the tracing stylus is attached; a holding unit configured to hold the tracing stylus shaft to be movable in the vertical direction; a vertical direction moving unit configured to move the holding unit in the vertical direction; and a moving radius direction moving unit configured to move the holding unit in the moving radius direction; a vertical position detection unit configured to detect a position of the tracing stylus in the vertical direction, the vertical position detection unit including at least a first detection unit configured to detect a position of the holding unit in the vertical direction and a second detection unit configured to detect a position of the tracing stylus in the vertical direction relative to the holding unit; and a controller configured to obtain a position of the holding unit in the vertical direction at a next measurement based on a detecting result of the vertical position detection unit obtained after start a measurement, and control the vertical direction moving unit based on the obtained position.