Patent ID: 6054850
Filing Date: 2000-04-25
Classification: G01D

Abstract:
A magnetic sensor unit comprising:a main sensor unit having(a) an intermediate part in the form of a short rectangular prism, the outer surface of said intermediate part forming a holder receptor, a receiving structure being provided on a part of said holder receptor, said receiving structure having an exterior specific shape that corresponds to a specific type of a magnetic sensor to insure that the proper magnetic sensor is inserted into the proper receiving structure, said exterior specific shape of the receiving structure being substantially rectangular where an edge portion of said rectangular receiving structure is cut off at an angle,(b) a step-shaped seating formed on one end face of said intermediate part,(c) a long plate shaped main part disposed at a right angle on the principal surface of said seating, said main part including,(i) a sensor element disposed on the end of said main part, for detecting the approaching motion of a magnetic member,(ii) a permanent magnet disposed adjacent to said sensor element for generating a magnetic field applied to said sensor element, and(iii) an electronic component electrically connected to said sensor element, and(d) a connector extending from said intermediate part, said connector including a terminal for transmitting an output signal of said sensor element to the outside; anda case having(a) a sleeve in the form of a cylinder with a closed end and an open end, said sleeve having sealing means formed on the open end, said sealing means serving to create a sealed space inside said sleeve in cooperation with said seating, said sealed space serving as a space in which said main part is placed, and(b) a holder for holding said holder receptor, said holder including a fitting structure having a wall structure conforming to said exterior specific shape extending from the open end of said sleeve, and a separation stopper for preventing said main part from moving off from said sleeve wherein the combination of said receiving structure having an exterior specific shape combined with a fitting structure having a wall structure conforming to said exterior specific shape extending from the open end of said sleeve dictates the combination of said receiving structure with said specific type of magnetic sensor.