Contact breaker points opening and closing feature null

摘要

PURPOSE:To make it possible to obtain a small, cheap and reliable breaker which is used for the purpose that doesn't need frequent opening and closing by utilizing almost all of spring force as contact pressure without causing escaping force at the engaging part of an opening/closing mechanism. CONSTITUTION:In the condition where the engagement between an engaging part 16 and an insulation lever 17 is released, force to press against a fixed contact 19 is not applied to a movable contact 18 and the contact opens by the energizing force of a spring plate 20 and the insulation lever 17 also slides downward following it. A engaging piece 17 released from engagement is pushed away upward along with an axis 14 until a spring 12 becomes free length and stops there. When the contact is closed again, if the axis 14 is pushed down with a reset button, etc., to a position where the engaging part 16 and the insulation lever 17 engage with each other resisting the spring 12 force, the engaging piece 15 engages with the insulation lever 17 by a spring 23. Hereby, the mechanism can be made small, simple and cheap and reliability in mechanism operation can also be elevated.