Explosion-protected sound transducer

摘要

Encapsulated sound transducer with plunger as connecting element between a diaphragm and an electromagnetic drive system; to achieve explosion protection, the drive system is encapsulated for explosion protection, excluding the diaphragm, the plunger penetrating through the encapsulation and leaving a gap which exhibits a gap width which is permissible for the explosion protection and is axially guided by at least one ball bearing or other bearing (Fig. 1). <IMAGE>