Speaker device, and method and device for producing the same

• US 6,899,794 B1
• Filed: 10/06/2000
• Issued: 05/31/2005
• Est. Priority Date: 10/06/2000
• Status: Expired due to Fees

• Current Assignee: Foster Electric Company Limited, Fuji CONE Seisakusho Company Limited, Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation), Morito Company Limited
• Original Assignee: Foster Electric Company Limited, Fuji CONE Seisakusho Company Limited, Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation), Morito Company Limited
• Inventors: Sugimoto, Yukio, Mori, Seiji, Yamada, Teruho, Kawahara, Masahiko, Iwasaki, Toshikazu
• Primary Examiner(s): Chin, Peter
• Application Number:
  US10/148,237
• Time in Patent Office: 1,698 Days
• Field of Search: 162/219, 162/221, 162/222, 162/227, 162/228, 162/231, 162/382, 162/383, 162/387, 162/388, 162/389, 162/390, 162/409, 162/411, 425/84, 425/85, 264/86, 264/87
• US Class Current: 162/219
• CPC Class Codes: D21J 7/00 Manufacture of hollow articles from fibre suspensions or papier-mâché by deposition of fibres in or on a wire-net mould
• CPC Class Codes: H04R 1/02 Casings; Cabinets ; Supports therefor; Mountings therein H04R1/28 takes precedence ; attachments for microphones H04R1/08; mounting of transducers in earpieces H04R1/1075
• CPC Class Codes: H04R 2201/34 Directing or guiding sound by means of a phase plug
• CPC Class Codes: H04R 2400/11 Aspects regarding the frame of loudspeaker transducers
• CPC Class Codes: H04R 2499/13 Acoustic transducers and sound field adaptation in vehicles
• 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 9/06 Loudspeakers

Abstract

A liquefied paper material is used as raw materials. A paper frame member 1 supporting a vibrating plate is paper-skimmed and formed. On paper-skimming and forming, a central hole for use in voice coils, air-release hole 1a releasing air pressure in a rear of the vibrating plate to outside due to vibration of the vibrating plate. A loudspeaker system is manufactured using the paper frame member 1.

Claims

1. A method of manufacturing a paper frame member for a loudspeaker system, comprising the steps of:

bringing an auxiliary mold having a masking pattern into contact with a portion of a forming surface in a frame-forming mold for paper-skimming and forming a frame member of a loudspeaker system;

supplying liquefied paper material, having a water content, for adhering to a section of the forming surface of the frame-forming mold corresponding to the masking pattern;

removing water from the liquefied paper material adhered to the forming surface of the frame-forming mold; and

heating and drying the paper material to form a paper frame member.

2. A method of manufacturing a loudspeaker system according to claim 1, further comprising the step of mixing thermoplastic resin fibers into the liquefied paper material prior to the step of supplying.

3. A method of manufacturing a loudspeaker system according to claim 1, further comprising foaming the liquefied paper material which is made from foaming paper materials.

4. A method of manufacturing a loudspeaker system according to claim 1, wherein the supplying step comprising the steps of:

lifting a first accommodation means for accommodating the liquefied paper material, and

feeding the liquefied paper material into a second accommodation means connected to the first accommodation means through a communication pipe to immerse the auxiliary mold and the frame-forming mold in the second accommodation means;

wherein the removing step comprises the steps of;

lowering the first accommodation means so that the liquefied paper material reaches a position lower than an adhering face defined by the liquefied paper material and the frame-forming mold; and

removing water from the liquefied paper material adhered to the frame-forming mold.

5. An apparatus of manufacturing a paper frame member for a loudspeaker system, comprising:

a frame-forming mold for paper-skimming and forming a frame member of a loudspeaker system;

an auxiliary mold having a masking pattern;

a first controlling means for bringing the auxiliary mold into contact with a forming surface of the frame-forming mold;

a second controlling means for controlling an adhesion of liquefied paper material having a water content to a section in the forming surface of the frame-forming mold corresponding to the masking pattern;

a third controlling means for removing water from the liquefied paper material adhered to the forming surface of the frame-forming mold; and

a fourth controlling means for heating and drying the paper material to form a paper frame member.

6. An apparatus of manufacturing a loudspeaker system according to claim 5, wherein the frame-forming mold and the auxiliary mold each have shape which are adequate for paper-skimming, and the frame member and a damper section, which brakes vibration of a vibrating plate in a loudspeaker system, may be formed in one piece.

7. An apparatus of manufacturing a loudspeaker system according to claim 5, further comprising:

a first accommodation means for accommodating liquefied paper material;

a second accommodation means for accommodating a frame-forming mold and an auxiliary mold;

a communication pipe for connecting the first accommodation means to the second accommodation means; and

an up-and-down controlling means for raising or lowering the first accommodation means.

8. A method of manufacturing a paper frame member for a loudspeaker system, comprising:

contacting a first mold having a masking pattern with a second mold, the second mold including a frame-forming mold;

supplying a paper fluid to adhere to the frame-forming mold on portions corresponding to the masking pattern;

removing water from and drying said paper fluid to form a frame member for a loudspeaker system from said frame-forming mold.

9. The method of claim 8, wherein said contacting includes contacting said first mold with the second mold using a lifting device and a controller, and said supplying includes supplying the paper fluid using a first bath containing said paper fluid being raised relative to a second bath containing said first and second molds to supply said paper fluid to the second bath.

10. The method of claim 8, wherein said removing includes compressing said frame-forming mold between two molds to remove the water, and said drying includes compressing said frame-forming mold between two heated molds to dry the paper fluid.

11. An apparatus for manufacturing a frame member for a loudspeaker system, comprising:

at least one or more controllers for;

contacting a first mold having a masking pattern with a second mold, the second mold including a frame-forming mold;

supplying a paper fluid to adhere to the frame-forming mold on portions corresponding to the masking pattern;

removing water from and drying said paper fluid to form a frame member for a loudspeaker system from said frame-forming mold.

12. The apparatus of claim 11, wherein said frame member being formed to include thermoplastic resin fibers.

13. The apparatus of claim 11, wherein said frame member and a damper section for reducing vibration of a vibrating plate in the loudspeaker system being formed from one mold.