Ergonomic micrometer with two adjustment modes

摘要

A micrometer provides a quick adjustment mode and a fine adjustment mode. A spline-like rotary coupling configuration constrains the micrometer thimble and a threaded element to move together with respect to rotation, but does not constrain the position of the threaded element relative to the thimble along the measurement axis. A gear in the micrometer frame includes gear teeth that mesh with the threaded element and roll thereon along the measurement direction. A locking arrangement, when unlocked, allows the meshed gear to be rotated by a user to drive the threaded element along the measuring axis in the quick adjustment mode. When locked, the locking arrangement prevents motion of the gear to provide the fine adjustment mode, wherein the user rotates the thimble to screw the threaded element through the meshed teeth of the gear, to adjust the spindle position.