Patent ID: 7123120

Claim:
A solenoid comprising: a molded coil composed of a coil of a plural number of turns having a hole at its center; and a solenoid main body having a case covering the outer periphery of the molded coil, a movable plunger inserted into the hole at the center of the molded coil, and a center post arranged in a direction in which the plunger is moved and attracted by a magnetic force generated by the coil, wherein there is provided a snap ring for integrating the molded coil and the solenoid main body into one, wherein the snap ring is mounted between a groove formed in an outer peripheral surface of the molded coil and a groove formed in an inner peripheral surface of the case, wherein an outer diameter of the molded coil as measured at least on the outer side of a position where the snap ring is mounted is substantially the same as an inner diameter of the case, wherein a peripheral section of the bottom of a groove formed in the outer peripheral surface of the molded coil and around which the snap ring is wrapped is noncircular, and wherein a wall portion is provided which protrudes from the bottom of the groove formed in the outer peripheral surface of the molded coil and around which the snap ring is wrapped and which constitutes a stopping between end portions of the snap ring.