PROBLEM TO BE SOLVED: To prevent a malfunction owing to a staggering motion of an inertia ball in an acceleration switch in which the inertia ball 7 and a contact member 6 are provided in an airtight container and a contact is opened/closed through the motion of the inertia ball 7 contacting with and parting from movable contacts 6A of the contact member.
SOLUTION: In this acceleration switch 1, braking parts 9A of a braking member 9 are provided so as to be positioned between the movable contacts 6A and the braking member 9 is at the same electric potential as a housing 5 of the airtight container while the plurality of braking parts 9A provided elastically receive the motion of the inertia ball. While the inertia ball 7 is rolling, a position where the braking parts 9A and the inertia ball make contact with each other is positioned on the housing middle side of a position where the movable contacts 6A and the inertia ball make contact with each other. Because of this, the inertia ball is braked even in a positional relation not causing it to make contact with the movable contacts and its staggering motion is promptly converged, suppressing the occurrence of a signal leading to a malfunction of a determination device in keeping therewith.
COPYRIGHT: (C)2007,JPO&INPIT
