Patent ID: 6093897
Filing Date: 2000-07-25
Classification: G01P,H01H

Abstract:
A collision detection device for a moving body comprising:a weight which is pivoted at a position eccentric from a barycenter thereof and adapted to swing in a certain direction in response to an acceleration acting thereon; andcontacts exerting a bias force on said weight and having their conduction state varied by swing motion of said weight, thereby indicating an incident of collision of said moving body,wherein said weight includes:an eccentric section which has a swing axis eccentric from the barycenter and defines an eccentric mass moment and a portion of a moment of inertia of said weight; andan inertial section symmetrical with respect to a barycenter of said inertial section, which swings together with said eccentric section and defines a portion of the moment of inertia of said weight about a swing shaft thereof, but contributes no eccentric mass moment to said weight,wherein said inertial section and eccentric section of said weight are separate parts, with said inertial section being fixed to the swing shaft which swings together with said eccentric section.