Method for manufacturing an electroacoustical transducer comprising a membrane configuration

• US 6,799,361 B2
• Filed: 02/08/2002
• Issued: 10/05/2004
• Est. Priority Date: 02/13/2001
• Status: Expired due to Term

• Current Assignee: Sound Solutions International Company, Ltd. (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Frasl, Ewald
• Primary Examiner(s): Tugbang, A. Dexter
• Assistant Examiner(s): Kim, Paul D
• Application Number:
  US10/071,371
• Publication Number:
  US 20020110257A1
• Time in Patent Office: 970 Days
• Field of Search: 295/94, 296/021, 296/091, 381/396, 381/398, 181/171, 181/172, 264/320, 264/544
• US Class Current: 29/594
• CPC Class Codes: H04R 31/00 Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor manufacture of microstructural arrangements of deformable or non-deformable structures in general B81C1/00182
• CPC Class Codes: H04R 31/003 for diaphragms or their outer suspension
• CPC Class Codes: H04R 31/006 Interconnection of transducer parts of diaphragm and outer suspension by moulding H04R31/003
• CPC Class Codes: Y10T 29/49002 Electrical device making
• CPC Class Codes: Y10T 29/49005 Acoustic transducer
• CPC Class Codes: Y10T 29/49007 Indicating transducer
• CPC Class Codes: Y10T 29/4902 Electromagnet, transformer or inductor
• CPC Class Codes: Y10T 29/4908 Acoustic transducer
• CPC Class Codes: Y10T 29/49805 Shaping by direct application of fluent pressure

Abstract

In an electroacoustic transducer (21) with a stationary transducer part (23) and with a membrane configuration (17) comprising a membrane (15) and a handling ring (1) for the membrane (15) connected with the membrane (15), the membrane configuration (17) is connected with the stationary transducer part (23) via the handling ring (1), and the handling ring (1) and membrane (15) are connected together via an interlocking connection.

Claims

1. A method of manufacturing an electroacoustic transducer, by which method a membrane configuration is produced, which membrane configuration consists of a membrane and a handling ring for the membrane connected to the membrane, and which membrane configuration is manufactured by a deep-drawing method in which a piece of foil for the manufacture of the membrane is shaped in a deep-drawing mold and is partly molded into the membrane therein and in addition is connected to the handling ring inserted into the deep-drawing mold, whereupon the handling ring and the molded piece of foil connected thereto are removed from the deep-drawing mold, and subsequently any portion of surplus foil is separated, and the membrane configuration is obtained as a result,

wherein in the deep-drawing process the handling ring is first introduced into the deep-drawing mold and is brought to rest with a first axial limiting ring surface on an annular axial limiting mold surface of the deep-drawing mold, whereupon the piece of foil is shaped in the deep-drawing mold such that an interlocking connection is created between the handling ring and a foil portion of the piece of foil, which foil portion forms part of the membrane configuration, during molding of the piece of foil.

2. The method as claimed in claim 1, wherein the foil portion of the piece of foil forming part of the membrane configuration is brought into contact with the handling ring in the area of an inner radial limiting ring surface of the handling ring, in the area of a second axial limiting ring surface of the handling ring opposite to the first axial limiting ring surface of the handling ring, and also in the area of the first axial limiting ring surface of the handling ring during molding of the piece of foil in the deep-drawing mold.

3. The method as claimed in claim 1, wherein the handling ring inserted into the deep-drawing mold is axially positioned by means of the annular axial limiting mold surface of the deep-drawing mold, of which axial limiting mold surface a diameter of the radial inner limiting edge is greater than a diameter of the inner radial limiting ring surface of the handling ring.

4. The method as claimed in claim 1, wherein the handling ring introduced into the deep-drawing mold is radially positioned by means of a radial limiting mold surface of the deep-drawing mold cooperating with an outer radial limiting ring surface of the handling ring.