| 摘要 |
<p>A trigger device (21) is provided with a firing pin (22) made of a non-magnetic material and arranged movably toward a detonator (10), an inertia body (23) formed of a permanent magnet and arranged movably toward the detonator (10), and a cylindrical permanent magnet (24) having an inner diameter greater than an outer diameter of the inertia body (23). The firing pin (22) extends freely through the inertia body (23). When an acceleration acting on the inertia body (23) exceeds repulsion between the inertia body (23) and the cylindrical permanent magnet (24), the inertia body (23) is caused to move toward the detonator (10) through a cavity of the cylindrical permanent magnet (24) so that the firing pin (22) strikes and fires the detonator. An attracting disk (25) made of a magnetic material is arranged in close contact with a detonator-side magnetic pole surface of the cylindrical permanent magnet (24) so that attraction for the inertia body (23) is increased. <IMAGE></p> |
