Patent ID: 8310227

Claim:
An electronic measuring wheel having: a casing being composed of a lower half-casing with a mounting recess and an upper half-casing, and having: a power supply mounted in the casing; a seven-segment display mounted in the casing and electrically connected to the power supply and having: a mounting frame mounted in the mounting recess of the lower half-casing to hold the power supply inside and having a top side and a sidewall; a panel board mounted on the top side of the mounting frame near the window of the upper half-casing, electrically connected to the power supply; and multiple seven segments; and a sensor mounted on the sidewall of the mounting frame of the seven-segment display in the casing and electrically connected to the power supply and the board panel of the seven-segment display; wherein the upper half-casing is detachably connected to the lower half-casing and has: a top surface; a window formed through the top surface of the upper half-casing and communicating with the mounting recess of the lower half-casing; and a mounting tube formed on and protruding from the top surface of the upper half-casing; a distance wheel rotatably connected to the casing and having: a center; a distance wheel axle mounted on and protruding from the center of the distance wheel and having an inner end mounted in the casing between the half-casings; and an induction ring mounted around the inner end of the distance wheel axle near the sensor; and an operating shaft connected to the casing and having a mounting end mounted in the mounting tube of the upper half-casing.