CN102300143A - Thin type speaker - Google Patents
Thin type speaker Download PDFInfo
- Publication number
- CN102300143A CN102300143A CN2010102104577A CN201010210457A CN102300143A CN 102300143 A CN102300143 A CN 102300143A CN 2010102104577 A CN2010102104577 A CN 2010102104577A CN 201010210457 A CN201010210457 A CN 201010210457A CN 102300143 A CN102300143 A CN 102300143A
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- CN
- China
- Prior art keywords
- voice coil
- vibrating diaphragm
- magnetic circuit
- vibration film
- conduction sheet
- Prior art date
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Abstract
The invention relates to a speaker, in particular to a thin type moving-coil speaker which has a small occupied space and is suitable for various electronic appliances and automobiles. The thin type speaker comprises a vibration film, a frame, a magnetic circuit system, a voice coil and a support, wherein the vibration film has a flat plate structure, is provided with high-density micro pores inside, can be formed by performing injection molding, and is suitable for large-scale production; the vibration film is fixed on the frame through a peripheral edge; the magnetic circuit system comprises two permanent magnets and a magnet conduction sheet; the magnet conduction sheet is clamped between the two permanent magnets; the diameter of the voice coil is approximate to the node circle of the vibration film; the size of the voice coil is defined 50-80 percent of the diameter of the vibration film; the voice coil is wound on the cylindrical support; and one end of the voice coil is fixed on the surface of the vibration film, and the other end of the voice coil is suspended in a gap of a magnetic circuit and is opposite to the magnetic conduction sheet.
Description
Affiliated technical field
The present invention relates to a kind of loud speaker, especially a kind of take up an area of the space few, be suitable for the slim coil-moving speaker that all kinds of electronic apparatuss and automobile are used.
Background technology
Traditional moving-coil speaker comprises tapered basin with certain depth and thick and heavy magnetic patch, and it is big that these elements take up an area of spaces, is difficult to put in the electric equipment products (for example, TV, computer) of slimming day by day go.In addition, along with reduction of discharging, environmental protection requirement, automobile industry also has demand widely to thin speaker.
Directly reduce the height of conical diaphragm in the conventional loudspeakers and the size of magnet and can reduce its integral thickness, but the result who does like this is: the tonequality of loud speaker, especially bass effect and fidelity, variation thereupon.Novel loudspeaker design is needed in the market demands of, high-fidelity slim in order to satisfy badly.
Summary of the invention
In order to overcome the shortcoming of existing loud speaker, the invention provides a kind of slim, high-fidelity, Hz-KHz is wide, electro-acoustic conversion efficiency is high loud speaker.
The technical solution adopted in the present invention is: a kind of thin speaker comprises vibrating diaphragm, framework, magnetic circuit system, voice coil loudspeaker voice coil and support; Described vibrating diaphragm has circular slab construction, but inside contains the injection mo(u)lding of high density micropore, is suitable for producing in enormous quantities; Further, vibrating diaphragm is fixed on the framework by peripheral ring.Described magnetic circuit system comprises two permanent magnets and a magnetic conduction sheet; Described magnetic conduction sheet is clipped in the middle of two permanent magnets.Described voice coil loudspeaker voice coil, the node circle of its diameter and vibrating diaphragm is close; Further, its size definition is the 50%-80% of diaphragm diameter; Voice coil loudspeaker voice coil is wrapped in cylinder and supports, and an end is fixed to the vibrating diaphragm surface, and the other end is suspended in the magnetic circuit gap, and is relative with magnetic conduction sheet.
Loud speaker of the present invention, its overall dimensions is thin, distortion is little, bass effect good, output acoustic pressure height.
Description of drawings
Fig. 1 is a dynamic planar loudspeakers schematic diagram of the present invention, the 11st, and vibrating diaphragm, the 12nd, vibrating diaphragm ring, the 13rd, framework, the 14th, magnetic circuit system.
Fig. 2 is a dynamic planar loudspeakers profile of the present invention, the 21st, and last magnet, the 22nd, magnetic conduction sheet, the 23rd, lower magnet, the 24th, voice coil loudspeaker voice coil, the 25th, centring disk.
Fig. 3 is a dynamic planar loudspeakers vibrating diaphragm schematic diagram of the present invention, the 31st, and the high density micropore.
Fig. 4 is the vibration-mode analysis result, the 41st, and the node circle.
Fig. 5 is a dynamic planar loudspeakers magnetic circuit system schematic diagram of the present invention.
Embodiment
As shown in Figure 1, a kind of thin speaker comprises vibrating diaphragm 11, vibrating diaphragm ring 12, framework 13 (the framework surface contains through hole) and inner magnetic circuit system 14.
Shown in the profile of Fig. 2, magnetic circuit system 14 comprises magnet 21, middle magnetic conduction sheet 22, lower magnet 23.In addition, thin speaker comprises a voice coil loudspeaker voice coil 24, and the one end is fixed to vibrating diaphragm 11 surfaces, and the other end connects the outer surface of location near magnetic conduction disk 22 by centring disk 25.
Conventional loudspeakers, vibrating diaphragm is shaped as taper, and such design can improve the rigidity of structure of vibrating diaphragm.The material of vibrating diaphragm selects the sort of low-density paper stock usually.High rigidity, low-density help to improve the resonance frequency of vibrating diaphragm mechanical structure.On general, the vibrating diaphragm fundamental frequency of loud speaker will surpass people's ear range of audibility (20 hertz-20 kilo hertzs), so just can avoid the sound-reducing distortion.Vibrating diaphragm 11 of the present invention is circular slab construction, and like this, on the geometry, the thickness of loud speaker is thinned.To a planar structure, its rigidity trends towards dying down.If adopt traditional paper stock vibrating diaphragm, when speaker operation, will produce a lot of mechanical resonances.Resonance brings the sound distortion, influences its reduction effect.
As shown in Figure 3, the circular slab construction of vibrating diaphragm tool of the present invention, high density micropore 31 is contained in its inside.Material is a matrix with the thermoplastic material, is preferably polypropylene (Polypropylene is called for short PP).By special micropore foaming forming technique, can make the closed porosity of the middle different size that gathers of vibrating diaphragm.The microporous foam formation process can be sketched and be: at first be supercritical fluid (carbon dioxide or nitrogen) to be dissolved into form single-phase solution in the hot melt adhesive; Inject the lower mold cavity of temperature and pressure then, thereby form a large amount of nuclei of bubbles because temperature and pressure reduces the unsteadiness of trigger molecule in goods, these nuclei of bubbles are grown up gradually and are generated small cavity.By the vibrating diaphragm that micropore foaming forming technique is made, density is lowered, but its rigidity has improved on the contrary.Therefore, disclosed thin speaker sound-reducing is good, distorted signals is little.
For the planar rondure vibrating diaphragm, by vibration-mode analysis, the present inventor finds, on the position of diaphragm diameter 50%-80%, has node cycle 41, as shown in Figure 4.So-called node referred in when resonance, and those present the less even geometric point of ' static ' of amplitude.In this invention, voice coil loudspeaker voice coil one end directly adheres on the node circle of vibrating diaphragm.That is to say that the diameter of voice coil loudspeaker voice coil is close with the node of vibrating diaphragm circle; Further, its size definition is the 50%-80% of diaphragm diameter.According to Theory of Vibration, when energized position is node, structure will can not produce resonance.Avoid mesomerism, make that the distortion factor of loud speaker is improved greatly.
Magnetic circuit system of the present invention has avoided using traditional thick and heavy huge magnetic patch.As shown in Figure 5, magnetic circuit system comprises magnet 21, middle magnetic conduction disk 22, lower magnet 23.Two magnet polarity are relative, magnetic field superposition, and its intensity improves, and electromagnetic force strengthens, and the result is: the electro-acoustic conversion efficiency height of loud speaker, output is boosted strong.
Disclosed loud speaker is suitable for all kinds of slim electric equipment productss and automobile audio is used.
Claims (4)
1. a thin speaker comprises vibrating diaphragm, framework, chinaware system, voice coil loudspeaker voice coil and support; Vibrating diaphragm is fixed on the framework by peripheral ring, and magnetic circuit system is directly connected on the framework, and voice coil loudspeaker voice coil is wrapped in cylinder and supports, and an end is fixed to the vibrating diaphragm surface, and the other end is suspended in the magnetic circuit gap, and is relative with magnetic conduction sheet.
2. thin speaker as claimed in claim 1 is characterized in that: but described vibrating diaphragm has circular slab construction, inside contains the injection mo(u)lding of high density micropore.
3. thin speaker as claimed in claim 1 is characterized in that: described magnetic circuit system comprises two permanent magnets and a magnetic conduction sheet; Described magnetic conduction sheet is clipped in the middle of two permanent magnets.
4. thin speaker as claimed in claim 1 is characterized in that: described voice coil loudspeaker voice coil, and the node circle of its diameter and vibrating diaphragm is close; Further, its size definition is the 50%-80% of diaphragm diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102104577A CN102300143A (en) | 2010-06-28 | 2010-06-28 | Thin type speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102104577A CN102300143A (en) | 2010-06-28 | 2010-06-28 | Thin type speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102300143A true CN102300143A (en) | 2011-12-28 |
Family
ID=45360249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102104577A Pending CN102300143A (en) | 2010-06-28 | 2010-06-28 | Thin type speaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102300143A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105187995A (en) * | 2014-06-19 | 2015-12-23 | 斯贝克电子（嘉善）有限公司 | Planar voice membrane loudspeaker |
| CN106101959A (en) * | 2016-07-18 | 2016-11-09 | 瑞声科技(新加坡)有限公司 | Speaker |
| CN109511061A (en) * | 2018-12-27 | 2019-03-22 | 歌尔股份有限公司 | Mini-sound device and electronic product |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101039531A (en) * | 2006-03-15 | 2007-09-19 | 美蓓亚株式会社 | Speaker |
| CN101346011A (en) * | 2008-07-02 | 2009-01-14 | 无锡杰夫电声有限公司 | Thin type loudspeaker with reversing magnetic structure |
-
2010
- 2010-06-28 CN CN2010102104577A patent/CN102300143A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101039531A (en) * | 2006-03-15 | 2007-09-19 | 美蓓亚株式会社 | Speaker |
| CN101346011A (en) * | 2008-07-02 | 2009-01-14 | 无锡杰夫电声有限公司 | Thin type loudspeaker with reversing magnetic structure |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105187995A (en) * | 2014-06-19 | 2015-12-23 | 斯贝克电子（嘉善）有限公司 | Planar voice membrane loudspeaker |
| CN105187995B (en) * | 2014-06-19 | 2018-10-16 | 斯贝克电子（嘉善）有限公司 | A kind of plane sound-membrane loudspeaker |
| CN106101959A (en) * | 2016-07-18 | 2016-11-09 | 瑞声科技(新加坡)有限公司 | Speaker |
| CN106101959B (en) * | 2016-07-18 | 2019-04-26 | 瑞声科技(新加坡)有限公司 | Loudspeaker |
| CN109511061A (en) * | 2018-12-27 | 2019-03-22 | 歌尔股份有限公司 | Mini-sound device and electronic product |
| CN109511061B (en) * | 2018-12-27 | 2024-04-05 | 歌尔股份有限公司 | Miniature sound generating device and electronic product |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111228 |