Abstract: Locking apparatus wherein the locking of the form-fit structure of locking is divided into two movements with the two directions of being generally perpendicular to each other. In the first movement, the snap-in elements are pre-stressed whereby the final locking does not yet occur. It is only in the second movement in a direction approximately perpendicular to the first movement that the final locking occurs by the locking of the snap-in elements. This division of directions permits the keeping of the movement distance for connection as short as desired even in tight spatial circumstances.

Abstract: A mechanism for mounting a loudspeaker in a front panel includes a plurality of arms having lips affixed to the front panel. A plurality of fingers are affixed to the loudspeaker. The arms and fingers resiliently engage to enable the loudspeaker to be mounted on the panel using a linear motion.

Abstract: A frame for a loudspeaker unit used, for example, in a television receiver, has provisions for optionally fastening one type of loudspeaker to the frame by a positively-locking fastening arrangement or another type of loudspeaker by screw fastening. Specifically, the frame includes both a positively-locking click-stop arrangement for snap-in fastening, and also clip elements for holding the loudspeaker during a screwing operation.

Abstract: Loudspeaker unit including a frame (FIG. 2) serving as sound guide to which the loudspeaker chassis (FIG. 1) is releasably fastened. According to the invention, form-locking cooperating detent means (4-6, 29-31) are provided on the frame and on the loudspeaker chassis. The loudspeaker chassis can be inserted into the frame by means of a relative translatory movement and can be removed by a rotational movement. Thus it becomes possible to install the loudspeaker in the frame and remove the loudspeaker from the frame by means of automatic machinery.