公开(公告)号：US11698142B2

公开(公告)日：2023-07-11

申请号：US17672579

申请日：2022-02-15

Applicant: CKD CORPORATION

Inventor： Shinji Itoh ,  Shotaro Hatanaka ,  Yasunari Azuma ,  Yasunari Ishihara

IPC: F16K31/06 ,  F16K27/06

CPC classification number: F16K27/065 ,  F16K31/0644

Abstract: A solenoid unit of an electromagnetic valve includes a coil, a bobbin, a fixed iron core, a movable iron core, an urging spring, a magnetic frame, and a molded plastic part. The magnetic frame includes a frame end wall, two frame arms, and an internal thread hole, to which the fixed iron core is threaded. A tubular projection protrudes from an end face of the frame end wall that is on a side opposite to the bobbin. The projection forms part of the internal thread hole. The molded plastic part includes a molded end wall, which covers the frame end wall, and a molded peripheral wall. The molded end wall includes a connecting hole that is continuous with the internal thread hole. The connecting hole includes a groove in an inner circumferential surface. The groove extends along an outer circumferential surface of the projection.