BRIEF DESCRIPTION OF THE DRAWINGS
The present invention is now described in more detail with reference to the appended drawings, in which;
FIG. 1 shows a first embodiment of the present invention with a rubber band-supported coil,
FIG. 2 shows a second embodiment of the present invention with a rubber band-support receiver and faceplate and
FIG. 3 shows third embodiment of the present invention having two housing parts.