| 摘要 |
PURPOSE:To reduce noise generated from the interior of a printing head and minimize the abrasion of a core surface and an armature by allowing an flexible buffer member to jut slightly out of the core attraction surface and to be mounted on an armature side near a core attraction surface, avoiding the same. CONSTITUTION:An O ring 16 produced with an elastic body of highly oil resistant synthetic rubber such as acrylic rubber and nitrile rubber is mounted on a projecting part of a core 10 in such a manner that the O ring protrudes slightly by l from a core attraction surface 18 to an armature 1 side. The armature 1 is fixed to a spring 5. Since the magnetic attraction force of a permanent magnet 11 overcomes the sum of the elastic force of a spring 5 and that of the O ring 16, the spring 5 sags and the O ring is elastically transformed to be crushed. The armature 1 directly contacts the core attraction surface 18. |
