Deceleration impact detector for use in automotive vehicle
AssigneeDenso Corporation
InventorMasahiko Imoto
Life of this patent
Estimating the term…
Abstract
A deceleration impact detector for detecting a vehicle collision or the like is composed of a rotor having an eccentric gravity center, a spring biasing the rotor to its initial position, a cam connected to rotor, and a pair of contacts consisting of a movable contact and a stationary contact. The rotor rotates together with the cam when a deceleration exceeding a predetermined level is imposed on the rotor. The pair of contacts are closed by the cam thereby to generate an electrical signal to inflate an air-bag. The movable contact is made of a resilient leaf spring, while the stationary contact is made of a plate having a high rigidity, so that resonant vibrations of the stationary contact otherwise caused by a high deceleration impact are avoided.
Claims5
A deceleration impact detector, comprising:
- a rotor supported by a rotor shaft, the rotor having a gravity center eccentric relative to the rotor shaft;
- a cam rotating together with the rotor around the rotor shaft;
- a biasing member for biasing the rotor toward an initial position of the rotor;
- and
- a contact member having a single pair of contacts adapted to be closed by being pushed by the cam when the rotor rotates by a predetermined rotational angle from the initial position, wherein the contact member is composed of a movable contact made of a resilient leaf spring and a stationary contact having a high rigidity, and the movable contact is portioned apart from the cam by a predetermined distance when the rotor is at its initial position.
Dependencies are inferred from the claim text.