ADJUSTABLE REPHASE DEVICE FOR COMPRESSION DRIVERS AND DIRECT EMISSION DOME-SHAPED LOUDSPEAKERS

Abstract

The invention concerns a rephasing device for compression drivers and dome-shaped, direct radiation loudspeakers that comprise a magnetic circuit with a vibrating diaphragm (11) having a dome-shaped part (11′), and a rephasing device (12) made of a non magnetic material, placed in the concavity of the dome-shaped part of said vibrating diaphragm. The rephasing device is supported axially, with respect to the diaphragm, in a movable form and provided with means of adjustment to supply precise adjustment and stability of the distance delineating the volume of a chamber between the diaphragm and rephasing device.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will, however, be described in detail from this point on in relation to a compression driver and referring to the attached drawings, in which:

FIGS. 1A and 1B show, respectively, a compression driver and a dome-shaped loudspeaker according to the state of the art described above;

FIG. 2A shows a classic magnetic circuit of a compression driver with a rephasing configuration that adapts to the diaphragm by means of a spacer 17 during assembly and is then glue fixed.

FIG. 3 shows a blow-up view of the of the crucial components of a loudspeaker according to the invention;

FIG. 4 shows a cross section view of the separate components shown in FIG. 3; and

FIG. 5 shows a cross-section of the assembled loudspeaker.

Claims

1. Rephasing device for compression drivers and dome-shaped, direct radiation loudspeakers that comprise a magnetic circuit with a vibrating diaphragm having a dome-shaped part, and with a rephasing device made of a non magnetic material, placed in the concavity of the dome-shaped part of said vibrating diaphragm, wherein the rephasing device is supported axially, with respect to the diaphragm, in a movable form and provided with means of adjustment to supply precise adjustment and stability of the distance delineating the volume of a chamber between the diaphragm and rephasing device.

2. Rephasing device according to claim 1, in which threaded bores are formed at right angles to the resting surface of the diaphragm and through adjusting screws in a rigid support and inserted in said threaded bores, said screws being tightened or loosened to move the rephasing device towards or away from the vibrating diaphragm.

3. Rephasing device according to claim 2, in which said threaded bores are provided in an equivalent number of legs protruding from the rephasing device in the opposite direction to the diaphragm, and in which, holes to receive the registration screws coinciding with said legs are provided in the diaphragm support.

4. Rephasing device according to claim 1, in which at least one rubber gasket, compressible into different sizes according to the variation in the position of the rephasing device with respect to the vibrating diaphragm, is positioned between the rephasing device and its face on said support.

5. Compression driver characterized in that it comprises an axially supported rephasing device which is equipped with means of adjustment to supply precise adjustment and stability of its distance from the diaphragm according to claim 1.

6. Dome-shaped loudspeaker (tweeter) characterized in that it comprises an axially supported rephasing device which is equipped with means of adjustment to supply precise adjustment and stability of its distance from the diaphragm according to claim 1.

7. Compression driver characterized in that it comprises an axially supported rephasing device which is equipped with means of adjustment to supply precise adjustment and stability of its distance from the diaphragm according to claim 2.

8. Compression driver characterized in that it comprises an axially supported rephasing device which is equipped with means of adjustment to supply precise adjustment and stability of its distance from the diaphragm according to claim 3.

9. Compression driver characterized in that it comprises an axially supported rephasing device which is equipped with means of adjustment to supply precise adjustment and stability of its distance from the diaphragm according to claim 4.

10. Dome-shaped loudspeaker (tweeter) characterized in that it comprises an axially supported rephasing device which is equipped with means of adjustment to supply precise adjustment and stability of its distance from the diaphragm according to claim 2.

11. Dome-shaped loudspeaker (tweeter) characterized in that it comprises an axially supported rephasing device which is equipped with means of adjustment to supply precise adjustment and stability of its distance from the diaphragm according to claim 3.

12. Dome-shaped loudspeaker (tweeter) characterized in that it comprises an axially supported rephasing device which is equipped with means of adjustment to supply precise adjustment and stability of its distance from the diaphragm according to claim 4.