Base fuze for a spinning projectile

A base fuze for a spinning projectile, comprising a fuze housing provided with bore means, a detonator cap, means for mounting said detonator cap in said bore means, a firing pin for piercing said detonator cap, a hammer sleeve with which there is attached said firing pin, centrifugal locking means for holding the hammer sleeve in a rest position spaced from the detonator cap, a self-destruction spring for displacing the hammer sleeve together with the firing pin towards the detonator cap, an inertia body for increasing the response sensitivity of the fuze, said inertia body being located behind said hammer sleeve, said inertia body having a front end face defining a front contact surface, said hammer sleeve having a rear end face defining a rear contact surface, said front contact surface and said rear contact surface confronting one another, said inertia body bearing with its front contact surface directly against the rear contact surface of said hammer sleeve upon impact of the projectile in order to increase the mass of the hammer sleeve during piercing of the detonator cap by the firing pin owing to the inertia of the inertia body.