Lever-type detector, stylus, and automatic stylus exchanger

摘要

A lever-type detector, a stylus, and an automatic stylus exchanger allow styluses of different types to be exchanged automatically and reduce the burden of exchanging the styluses of different types for the lever-type detector. An approximately U-shaped notch is formed in a seating plate provided for a stylus body. In order to attach a stylus to a stylus holder, the longitudinal direction of the stylus body is set in a direction orthogonal to the central axis of a shaft body of the stylus holder, and the seating plate is moved in the direction orthogonal to the central axis of the shaft body. Then, the notch guides the shaft body to the center of gravity of the whole stylus on the seating plate. With the shaft body guided to the center of gravity by the notch, a flat swinging member holds the seating plate detachably.

主权项

1. A lever-type detector comprising:
a stylus having a contact part that comes into contact with a workpiece; a stylus holder that supports the stylus swingably; displacement detection means for detecting a swinging displacement of the stylus in order to measure a surface property of the workpiece; the stylus comprising a stylus body having the contact part at a tip end and a seating that is disposed in a base end of the stylus body and is detachable from the stylus holder; the stylus holder comprising (i) a shaft body that serves as the center of swinging of the stylus, and (ii) a swinging member supported by the shaft body; the seating containing the position of the center of gravity of the whole stylus separated from the stylus holder and having a notch for guiding the shaft body to the center of gravity of the stylus when the stylus is attached; and the shaft body configured to be guided to the center of gravity through the notch, the seating being detachably held by the swinging member, and the stylus becoming swingable about the shaft body.