| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a highly effective magnet surface by providing a magnet armature with a section extending in a magnet coil to an area of the maximum magnetic flux, cooperating this section with a valve seat of a through hole, and limited by the flange-like edge arranged outside the magnet coil and extending into a ring shape. SOLUTION: An armature 20 is provided with a V-shaped cross section having an edge 21 extending into a flange shape and a section 22 with a bottom 23 extending in a magnet coil 13 to a position of the maximum magnetic flux density. During no-current feeding to the magnet coil 13, the armature 20 is pushed toward a projection 37 of a valve connecting member 33 by the force of a spring so that a valve ball 19 seals a hole 38 relative to a pump P to form a through connection between a consuming vessel A and a return guide vessel T. During the feeding to the magnet coil 13, the armature 20 is attracted by the magnet core 15, and the valve ball 19 is mounted on the valve seat 18 to close a hole 17 communicated with the return guide vessel T. By this constitution, a through-connection between the pump P and a consuming vessel A can be formed.</p> |
