| 摘要 |
A normally closed electromagnetic valve has a cylindrical valve housing (22); a valve seat member (23); a fixed core (24); a movable core (26); a valve body (28); a return spring (29); and, a coil (30), one side of the valve housing being housed in a mounting hole (34) opened on one end of a substrate so as to be restricted in axial movement thereof toward the interior of the mounting hole, wherein a large diameter portion (34c) is provided in the axially middle portion of the valve housing (22), the cylindrical valve seat member (23) forms an annular chamber (45) with the inner surface of the large diameter portion (34c), the annular chamber (45) communicates to a valve chamber (25), and is fixed to and fitted in one end of the valve housing (22) and communicating holes (32) through which the annular chamber (45) is communicated to the exterior of the valve housing (22) are provided in the large diameter portion (34c). <IMAGE>
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