Patent ID: 7243944

Claim:
An activating device for an occupant protection device comprising: a first deceleration detecting means for detecting a first deceleration which is the deceleration in a front/rear direction of a vehicle; an activation judging means for judging the activation of the occupant protection device by comparing the first deceleration with a predetermined first threshold value; a second deceleration detecting means for detecting a second deceleration which is the deceleration in the front/rear direction of the vehicle, the second deceleration detecting means being arranged further forward in the vehicle than the first deceleration detecting means; a collision condition detecting means for detecting a collision condition of the vehicle by using the second deceleration; and a first threshold value setting means for setting the first threshold value of the activation judging means for judging the activation of the occupant protection device based on the condition detected by the collision condition detecting means, wherein said collision condition detecting means includes a collision condition detecting map for detecting a vehicle collision condition by comparing the second deceleration with a predetermined second threshold value which is set on said map beforehand such that the second threshold value changes so as to form a predetermined pattern, and wherein the collision condition detecting map is formed by the second deceleration and a second deceleration integration value, wherein the collision condition detecting means judges the possibility of collision if the second deceleration integration value exceeds the second threshold value.