Patent ID: 8869601

Claim:
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.