US 8,769,803 B2Granted

Speaker manufacturing method

AssigneePanasonic Corporation

InventorsToshiyuki Koike, Shinsaku Sawa, Tadashi Akiyama

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Abstract

Provided is a method of manufacturing a loudspeaker including assembling a magnetic circuit and a frame. In the step of assembling the magnetic circuit and the frame, parallelism between a plate and a damper attachment portion of the frame is ensured by bringing an upper portion of the plate and the damper attachment portion of the frame into contact with a jig. In addition, perpendicularity between a magnetic gap and the damper attachment portion of the frame is ensured by bringing an outer circumferential side portion of the plate of the magnetic gap and an inner circumferential side portion of the yoke into contact with the jig. The magnetic circuit and the frame are assembled in such a state. With such a manufacturing method, it is possible to achieve a superior loudspeaker capable of reducing a gap defect while being downsized and having increased maximum input power.

Claims5

Dependent claims

A method of manufacturing a loudspeaker, the method comprising the steps of:

assembling a magnetic circuit having a yoke, a magnet, and a plate;
assembling the magnetic circuit and a frame;
assembling a voice coil and a damper;
inserting the voice coil into a magnetic gap of the magnetic circuit, and coupling the frame with the damper;
and
inserting and fixing the voice coil into and to a diaphragm, and assembling the frame and the diaphragm, wherein
in the step of assembling the magnetic circuit and the frame, the magnetic circuit and the frame are assembled, while parallelism between the plate and a damper attachment portion of the frame is ensured by bringing an upper portion of the plate and the damper attachment portion of the frame into contact with a jig, and while perpendicularity between the magnetic gap and the damper attachment portion of the frame is ensured by bringing an outer circumferential side portion of the plate of the magnetic gap and an inner circumferential side portion of the yoke into contact with the jig.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/581,134Filed 30 Mar 2011
Priority: JP 2010-07834530 Mar 2010
Published: US 2012/0317792 A120 Dec 2012
Granted: 8 Jul 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H04R 31/00
Apparatus or processes specially adapted for the manufacture of transducers or diaphragms
H04R 9/02
Transducers of moving-coil, moving-strip, or moving-wire type: details
H04R 31/006
Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor: interconnection of transducer parts
Y10T 29/49002
Method of mechanical manufacture: electrical device making

Family

US 2012/0317792 A1Pre-grant publication · published 20 Dec 2012
US 8,769,803 B2This patent

From the US filing history. Foreign family members aren’t listed.

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