Importance

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Abstract

A process for producing a pulse generator which includes a stay, a coil assembly, a core surrounded by the coil assembly, and a magnet clamped between a base end of the core and the stay, all of which are coupled to one another by a synthetic resin. In a producing process, the insert assembly including the core connected at its base end to the stay through the magnet is inserted into a resin mold having a reference receiving portion into which the substantially entire core is fitted and which receives at least one of the tip and base ends of the core. A molten synthetic resin is poured into the resin mold to form a case of the synthetic resin, which includes a positioning projection on an outer surface thereof at a location spaced at a constant distance from at least one of the tip and base ends of the core. Then, in a condition in which the coil assembly has been inserted into an accommodating recess provided in the case, the synthetic resin is filled into between an inner surface of the accommodating recess and the coil assembly. Thus, a gap between the tip end of the core and a pulse rotor is always constant, and the inclination of a core and the breakage of a coil are prevented.

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First Claim