Patent ID: 7421909
Filing Date: 2008-09-09
Classification: G01D,G01P

Abstract:
1. A method for producing a rotation detector for vehicular use, the rotation detector having a sensor body, a resin molding, a magnet for magnetizing a rotating rotor in a shape of a disk, at least two sensors for generating an output signal upon sensing change in magnetism caused by rotation of the rotor, an IC for processing the output signal from the at least two sensors, an IC lead wire for transferring a pulse signal from the IC, and a wiring covered by a sheath and having a core wire in electrical connection to the IC lead wire, wherein the sensor body is formed by the resin molding that covers the IC, the IC lead wire and a connection portion between the IC lead wire and the core wire, wherein the resin molding includes a resin base, a first resin part and a second resin part, and wherein the wiring extends substantially perpendicularly relative to an axis of the sensor body, the method comprising: providing a case-shape housing having a bottom and a side wall including a sensor side position mark to house the IC by referring to the sensor side position mark so that the sensor side position mark is arranged in a predetermined positional relationship with an arrangement of the at least two sensors; forming the first resin part of the resin molding, wherein the first resin part in combination with the ease-shape housing covers the IC, the IC lead wire and the core wire so that the wiring extends in line with an axis of the sensor body; providing a mold that is capable of changing an arrangement angle of the mold side position mark around the axis of the sensor body in a hollow space for forming the sensor body that includes the mold side position mark, wherein the first resin part is positioned by aligning the sensor side position mark with the mold side position mark in the hollow space after the arrangement angle of the mold side position mark around the axis of the sensor body is determined; bending the wiring substantially perpendicularly to the sensor body; and forming the second resin part of the resin molding by pouring resin into the hollow space defined by the mold, wherein the second resin part includes an outer periphery of the sensor body and a bent portion that fixes the wiring extending from the sensor body.