Method for manufacturing an electroacoustical transducer comprising a membrane configuration

• US 20020110257A1
• Filed: 02/08/2002
• Published: 08/15/2002
• Est. Priority Date: 02/13/2001
• Status: Active Grant

• 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
• Granted Patent: US 6,799,361 B2
• Time in Patent Office: Days
• US Class Current: 381/398
• 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 (21), by which method a membrane configuration (17) is produced, which membrane configuration (17) consists of a membrane (15) and a handling ring (1) for the membrane (15) connected to the membrane (15), and which membrane configuration (17) is manufactured by a deep-drawing method in which a piece of foil for the manufacture of the membrane (15) is shaped in a deep-drawing mold (3) and is partly molded into the membrane (15) therein and in addition is connected to the handling ring (1) inserted into the deep-drawing mold (3), whereupon the handling ring (1) and the molded piece of foil connected thereto are removed from the deep-drawing mold (3), and subsequently any portion of surplus foil (20) is separated, and the membrane configuration (17) is obtained as a result,

wherein in the deep-drawing process the handling ring (1) is first introduced into the deep-drawing mold (3) and is brought to rest with a first axial limiting ring surface (6) on an annular axial limiting mold surface (11) of the deep-drawing mold (3), whereupon the piece of foil is shaped in the deep-drawing mold (3) such that an interlocking connection is created between the handling ring (1) and a foil portion (16) of the piece of foil, which foil portion (16) forms part of the membrane configuration (17), during molding of the piece of foil.

2. A method as claimed in claim 1, wherein the foil portion (16) of the piece of foil forming part of the membrane configuration (17) is brought into contact with the handling ring (1) in the area of an inner radial limiting ring surface (8) of the handling ring (1), in the area of the second axial limiting ring surface (7) of the handling ring (1) opposite to the first axial limiting ring surface (6) of the handling ring (1), and also in the area of the first axial limiting ring surface (6) of the handling ring (1) during molding of the piece of foil in the deep-drawing mold (3).

3. A method as claimed in claim 1, wherein the handling ring (1) inserted into the deep-drawing mold (3) is axially positioned by means of an annular axial limiting mold surface (11) of the deep-drawing mold (3), of which axial limiting mold surface (11) the diameter (D1) of the radial inner limiting edge (12) is greater than the diameter (D2) of the inner radial limiting ring surface (8) of the handling ring (1).

4. A method as claimed in claim 1, wherein the handling ring (1) introduced into the deep-drawing mold (3) is radially positioned by means of a radial limiting mold surface (13) of the deep-drawing mold (3) cooperating with an outer radial limiting ring surface (9) of the handling ring (1).

5. 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 to the membrane (15),

wherein the membrane configuration (17) is attached to the stationary transducer part (23) by means of the handling ring (1), and

wherein the handling ring (1) and the membrane (15) are joined together by means of an interlocking connection.

6. An electroacoustic transducer (21) as claimed in claim 5, wherein the interlocking connection between the membrane (15) and the handling ring (1) is obtained in that the membrane (15) is kept in contact with the handling ring (1) in the area of an inner radial limiting ring surface (8) of the handling ring (1), in the area of a first axial limiting ring surface (6) of the handling ring (1), and in the area of a second axial limiting ring surface (7) of the handling ring (1) opposite the first axial limiting ring surface (6) of the handling ring (1).

7. A membrane configuration (17) for an electroacoustic transducer (21), which membrane configuration (17) comprises a membrane (15) and a handling ring (1) for the membrane (15) connected to the membrane (15), wherein the handling ring (1) and the membrane (15) are joined together by means of an interlocking connection.

8. A membrane configuration (17) as claimed in claim 7, wherein the interlocking connection between the membrane (15) and the handling ring (1) is obtained in that the membrane (15) is kept in contact with the handling ring (1) in the area of an inner radial limiting ring surface (8) of the handling ring (1), in the area of a first axial limiting ring surface (6) of the handling ring (1), and in the area of a second axial limiting ring surface (7) of the handling ring (1) opposite the first axial limiting ring surface (6) of the handling ring (1).