Patent ID: 8302322

Claim:
A detector for a measuring device comprising: a rod-shaped stylus comprising a contact at a tip thereof, the contact configured to contact a measured object; a holder configured to hold a proximal end of the stylus; a body configured to support the holder rotatably about a predetermined rotational axis; and a sensor that detects a rotational displacement of the holder, wherein: the detector detects a displacement of the tip of the stylus in an axial direction of the stylus based on the rotational displacement of the holder, the holder comprises: an abutting member comprising a groove on which the proximal end of the stylus abuts; and a biasing member positioned to face the abutting member in a direction perpendicular to an axis of the stylus and the rotational axis, and biases the proximal end of the stylus against the groove, the abutting member further comprises an extender positioned adjacent to the groove in an extending direction of the groove and on a same side of the rotational axis as the groove, the extender further extending toward the biasing member, the stylus comprises a proximal tapered portion at the proximal end of the stylus, the tapered portion extending toward a proximalmost end of the stylus, and contact of the proximal tapered portion of the stylus and the extender converts a force applied to the tip of the stylus in the axial direction of the stylus into the rotational displacement of the holder, which is to be detected by the sensor.