| 摘要 |
An armature chamber receives an armature and includes a first armature chamber, which is placed adjacent to one end surface of the armature and is communicated with a spring chamber, and a second armature chamber, which is placed adjacent to the other end surface of the armature, which is opposite from the one end surface of the armature. The armature includes a primary communication passage that communicates between the first armature chamber and the second armature chamber. An opening end of the primary communication passage, which opens on a side where the first armature chamber is located, is placed at a corresponding location of the armature, which is opposed to the spring chamber. |
