Shock detecting device

摘要

An impact sensing apparatus includes a housing having a wall portion which is parallel with the applied direction of an outside shock and a hole which is formed in the wall portion, a weight disposed in the housing and moved by an outside shock which is more than a predetermined value, an output member rotatably disposed in the housing and rotated in response to the movement of the weight and an urging member interposed between the housing and the output member for urging the output member so as to project from the hole. According to this improved impact sensing apparatus, it is possible to lengthen the stroke of the rotational motion of the output member and therefore it is possible to effectively utilize the urging force of the urging member as a kinetic energy of the output member. Thus, it is possible to improve the reliability for igniting the ignition element such as a primer due to a striking operation of the output member.