Patent ID: 7681321

Claim:
An eyeglass frame shape measuring apparatus for measuring a three-dimensional shape of a rim of an eyeglass frame, the apparatus comprising: a frame holding unit which holds the frame in a desired position; a rotary base which is relatively rotated with respect to the held frame; a feeler holding unit which comprises a support shaft to which a feeler to be inserted into a groove of the rim at a time of measurement is attached, a first arm for holding the support shaft, an elastic body for urging the first arm so that the support shaft is urged outward with respect to a rotation center axis of the rotary base, and a first arm holding unit for holding the first arm so as to enable the support shaft to be inclined with respect to the rotation center axis, the feeler holding unit being provided on the rotary base; a detecting unit which detects movement of the first arm; and an arithmetic unit which obtains a three-dimensional movement position of the feeler to obtain the three-dimensional shape of the rim, on the basis of rotation of the rotary base and results of detection of the detecting unit.