Diaphragm for electrodynamic transducer

• US 5,283,397 A
• Filed: 09/25/1992
• Issued: 02/01/1994
• Est. Priority Date: 09/25/1991
• Status: Expired due to Fees

• Current Assignee: Akustische V Kino-Geraete GmbH
• Original Assignee: Akustische V Kino-Geraete GmbH
• Inventors: Pavlovic, Dino
• Primary Examiner(s): Gellner, Michael L.
• Assistant Examiner(s): Dang, Khanh
• Application Number:
  US07/951,583
• Time in Patent Office: 494 Days
• Field of Search: 181/152, 181/154, 181/159, 181/163, 181/164, 181/165, 181/168, 181/169, 181/173
• US Class Current: 181/163
• CPC Class Codes: H04R 7/12 Non-planar diaphragms or cones

Abstract

A diaphragm with moving coil for electrodynamic transducers has in the center thereof a spherically-shaped portion and adjacent to the spherically-shaped portion a toroidally-shaped zone which may be provided with corrugations. An outwardly diverging, truncated cone-shaped collar is placed on the spherically-shaped portion. The collar may be of the same material as the diaphragm. The collar has a circular rim which is mechanically fixedly connected to the spherically-shaped portion. The circular rim of the collar has a smaller diameter than the moving coil.

Claims

1. In a diaphragm for electrodynamic transducers, the diaphragm having a center and an edge, the diaphragm including a spherically-shaped portion in the center thereof and toroidally-shaped portion adjacent the spherically-shaped portion extending to the edge of the diaphragm, a moving coil connected to the spherically shaped portion of the diaphragm, the improvement comprising an outwardly diverging, truncated cone-shaped collar mounted on the spherically-shaped portion, the truncated cone-shaped collar having a circular rim, the circular rim being mechanically fixedly connected to the spherically-shaped portion, wherein the moving coil and the circular rim each have a diameter, wherein the diameter of the circular rim of the collar is smaller than the diameter of the moving coil.

2. The diaphragm according to claim 1, wherein the toroidally-shaped zone is corrugated.

3. The diaphragm according to claim 1, wherein the truncated cone-shaped collar and the spherically-shaped portion and the toroidally-shaped portion of the diaphragm are of the same material.

4. The diaphragm according to claim 1, wherein the truncated cone-shaped collar and the spherically-shaped portion and the toroidally-shaped portion of the diaphragm are of different materials.

5. The diaphragm according to claim 4, wherein the material of the truncated cone-shaped collar is metal foil or paper

6. The diaphragm according to claim 1, wherein the circular rim of the truncated cone-shaped collar is mechanically fixedly connected to the spherically-shaped portion of the diaphragm by a glued connection or an ultrasonically welded connection.