Patent ID: 6469269
Filing Date: 2002-10-22
Classification: H01H

Abstract:
A two-stage self-locking switch for electric band tools comprising:a trigger base structure; a switch seat; an auto-return switch arranged in said switch seat; a trigger-controlling structure pivoted to said switch seat, said trigger-controlling structure being provided with at least an arresting part and an elastic slice, and said trigger-controlling structure being connected to a rear part of said switch seat so as to secure said elastic slice to said switch seat; and a trigger structure being pivoted to said switch seat and comprising a triggering switch having a top provided with a resisting plate, two ends of said triggering switch being arranged with a switch plate and an elastic slice of said trigger structure respectively, said elastic slice of said trigger structure contacting said trigger base structure; wherein when no external force is applied to said trigger structure, said arresting part sets against said resisting plate, making said trigger switch unable to be pressed; and when said tigger-controlling structure is pressed, said arresting part is moved away from said resisting plate, making said trigger switch able to be pressed.