Unlock instant, AI-driven research and patent intelligence for your innovation.

Micro loudspeaker

A technology for micro-speakers and shells, which is applied to sensors, electrical components, etc., and can solve problems such as difficulty in handling, irregular bonding of vibrating pieces, and difficulty in realizing automation of voice coil fixing manufacturing processes, etc.

Inactive Publication Date: 2004-12-01
CITIZEN ELECTRONICS CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the vibrating plate 6 is made of a plastic film with poor rigidity, it is difficult to hold and it is difficult to automate the voice coil fixing manufacturing process.
[0007] Moreover, since the end 9 of the voice coil is interposed between the housing 1 and the shield 7, the vibrating piece 6 floats slightly, which causes irregular bonding of the vibrating piece

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Micro loudspeaker
  • Micro loudspeaker
  • Micro loudspeaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] see figure 1 with 2 , the casing 12 made of plastic is divided into an upper casing 12a and a lower casing 12b, and the two casings 12a and 12b are bonded to each other with an adhesive. The microspeaker of the present invention comprises a yoke 13 made of magnetic material and embedded in the lower housing 12b by an insert molding method, a permanent magnet 14 fixed to the yoke 13 and a top plate bonded to the magnet 14 15.

[0017] The lower side of the upper case 12a is fixed with a vibrating plate 17 at its periphery. A voice coil 16 fixed on the lower side of the vibrating plate 17 is inserted in the magnetic gap between the top plate 15 and the yoke 13 . The upper case 12a is fixed with a protective plate 18 made of metal. A plurality of sound emitting holes are formed on the lower case 12 b and the protective plate 18 .

[0018] A pair of end portions 20 of voice coil 16 are bonded to the lower side of diaphragm 17 . Each end portion 20 extends outward fro...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A case comprises an upper case and a lower case. A vibrating plate is secured to the upper case, a voice coil is secured to an underside of the vibrating plate. Each end portion of the voice coil is engaged in a groove formed in the upper case.

Description

technical field [0001] The present invention relates to a microspeaker for use in portable communication devices such as portable telephones and the like. Background technique [0002] See denoting a conventional microspeaker Figure 4 with 5 The yoke 2 made of magnetic material is embedded in the housing 1 made of plastic by insert molding. The permanent magnet 3 is fixed on the yoke 2 , the top plate 4 made of magnetic material is bonded to the magnet 3 to form a magnetic circuit, and a magnetic gap is formed between the top plate 4 and the yoke 2 . [0003] The vibrating piece 6 is fixed to the case 1 at its periphery. The voice coil 5 fixed to the lower side of the vibrating plate 6 is inserted in the magnetic gap. A shield 7 made of metal is fixed to the housing 1 so as to sandwich the vibrating piece 6 therebetween. A plurality of sound emitting holes are formed in the casing 1 and the protective cover 7 . [0004] Such as Figure 4 As shown, a pair of end portion...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04R31/00H04R9/02H04R9/04H04R9/06
CPCH04R9/06H04R9/045H04R31/006H04R2499/11H04R9/02
Inventor 宫本一美太田良纯小林孝
Owner CITIZEN ELECTRONICS CO LTD