CN101867857A - Thin type speaker magnetic circuit - Google Patents
Thin type speaker magnetic circuit Download PDFInfo
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- CN101867857A CN101867857A CN201010216907A CN201010216907A CN101867857A CN 101867857 A CN101867857 A CN 101867857A CN 201010216907 A CN201010216907 A CN 201010216907A CN 201010216907 A CN201010216907 A CN 201010216907A CN 101867857 A CN101867857 A CN 101867857A
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- magnetic
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- magnetic yoke
- type conductive
- basin frame
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Abstract
The invention relates to a thin type speaker magnetic circuit. According to the technical scheme provided by the invention, the thin type speaker magnetic circuit comprises a basin frame, a U-shaped magnetic yoke, a magnet and a magnetic pole core, wherein the magnet and the magnetic core are arranged inside the U-shaped magnetic yoke, the lower surface of the magnet is tightly combined with the inner surface of the bottom of the U-shaped magnetic yoke, the upper surface of the magnet is tightly combined with the magnetic pole core, and a certain magnetic gap is reserved between the outer walls of the magnet and the magnetic pole core and the inner wall of the U-shaped magnetic yoke. The thin type speaker magnetic circuit is characterized in that a center hole is arranged on the center of the bottom of the basin frame, the U-shaped magnetic yoke is arranged in the center hole, and the bottom surface of the U-shaped magnetic yoke and the bottom surface of the basin frame are positioned on the same plane. The invention has skillful and reasonable structure and effectively reduces the total height of the speaker magnetic circuit without reducing the magnetic flux and the BL value, and overlarge heat energy cannot be caused by cutting magnetic lines of force by a voice coil in an alternating magnetic field so as to ensure the acoustic performance and the reliability of the speaker product.
Description
Technical field
The invention belongs to the electroacoustic techniques field, relate to a kind of magnetic circuit structure for loudspeaker, specifically a kind of thin type speaker magnetic circuit.
Background technology
In the prior art, be applied to the loud speaker of panel TVs such as LCD, PDP, its magnetic structure generally is U type conductive magnetic yoke to be arranged on basin frame bottom and to lower convexity, the thickness of this magnetic structure is higher, is not suitable for novel ultra-thin panel TV and uses.Also have U type conductive magnetic yoke is directly removed, form open magnetic circuit, though this open magnetic structure has solved the thickness problem of higher, it is big to have occurred distortion again, and the defective that leakage field is serious badly influences the quality of product.
Therefore, need a kind of thin type speaker magnetic circuit structure of design, by changing the mutual alignment of U type conductive magnetic yoke and basin frame, reduced the overall height of magnetic circuit of loudspeaker, do not reduce simultaneously magnetic flux and BL value, can not guarantee the acoustic performance and the reliability of speaker product because of voice coil loudspeaker voice coil cutting magnetic line in alternating magnetic field causes excessive heat energy yet.
Summary of the invention
The objective of the invention is at above shortcomings in the prior art, provide a kind of structure ingenious rationally, the thin type speaker magnetic circuit of high magnetic flux and high BL value, this magnetic circuit of loudspeaker has effectively reduced the overall height of magnetic circuit of loudspeaker, do not reduce simultaneously magnetic flux and BL value, can not guarantee the acoustic performance and the reliability of speaker product because of voice coil loudspeaker voice coil cutting magnetic line in alternating magnetic field causes excessive heat energy yet.
According to technical scheme provided by the invention, described thin type speaker magnetic circuit comprises basin frame, U type conductive magnetic yoke, magnet and magnetic pole core, magnet and magnetic pole core are installed in the U type conductive magnetic yoke, magnet lower surface and U type conductive magnetic yoke bottom interior surface are combined closely, the magnet upper surface magnetic pole core of combining closely leaves certain magnetic gap between the inwall of the outer wall of magnet and magnetic pole core and U type conductive magnetic yoke; It is characterized in that: described basin frame bottom centre offers mesopore, and U type conductive magnetic yoke is installed in the mesopore, and U type conductive magnetic yoke bottom surface and basin frame bottom surface are in same plane.
As a further improvement on the present invention, described U type conductive magnetic yoke bottom outer rim is provided with stopper slot to the inboard, and the geomery of stopper slot is corresponding identical with the mesopore of basin frame, and the height of stopper slot is identical with the thickness of basin frame bottom.
As a further improvement on the present invention, the mesopore of described U type conductive magnetic yoke and basin frame bottom adopts interference fit to combine closely.
As a further improvement on the present invention, the inner surface bottom centre of described U type conductive magnetic yoke is provided with the boss that raises up, and magnet is combined closely at the top of boss.
As a further improvement on the present invention, between described magnet and the U type conductive magnetic yoke, all adopt the adhesive gummed fixing between magnet and the magnetic pole core.
The present invention compared with prior art, advantage is:
(1), structure is ingenious rationally, by changing the mutual alignment of U type conductive magnetic yoke and basin frame, U type conductive magnetic yoke is arranged in the mesopore of basin frame bottom, make U type conductive magnetic yoke bottom surface and basin frame bottom surface be in same plane simultaneously, reduced the whole height of magnetic structure effectively, and guarantee that magnetic flux and BL value can not reduce, and have strengthened the reliability of loud speaker greatly.
(2), the stopper slot of U type conductive magnetic yoke bottom outer rim setting improved U type conductive magnetic yoke and the steadiness that the mesopore of basin frame combines, and guaranteed that the integral thickness of magnetic circuit structure for loudspeaker is reasonable.
(3), the boss that is provided with on the U type conductive magnetic yoke increased the bottom level of U type conductive magnetic yoke, reduced the thickness of magnet, saved cost under the prerequisite that keeps magnetic flux density.
Description of drawings
Fig. 1 is the structural representation of the preferred embodiment of the present invention.
Fig. 2 is the stereochemical structure decomposing schematic representation of Fig. 1.
Fig. 3 is the perspective view of U-shaped conductive magnetic yoke among Fig. 1.
Description of reference numerals: 1-basin frame, 1a-mesopore, 2-U type conductive magnetic yoke, 2a-stopper slot, 2b-boss, 3-magnet, 4-magnetic pole core.
Embodiment
Below in conjunction with concrete drawings and Examples the present invention is further described.
As shown in the figure, the thin type speaker magnetic circuit among the embodiment mainly is made up of basin frame 1, U type conductive magnetic yoke 2, magnet 3 and magnetic pole core 4.
As Fig. 1～shown in Figure 3, described basin frame 1 bottom centre offers mesopore 1a, U type conductive magnetic yoke 2 is installed in the mesopore 1a, and U type conductive magnetic yoke 2 adopts interference fit to combine closely with the mesopore 1a of basin frame 1 bottom, and U type conductive magnetic yoke 2 bottom surfaces and basin frame 1 bottom surface are in same plane.Described magnet 3 and magnetic pole core 4 are installed in the U type conductive magnetic yoke 2, magnet 3 lower surfaces and U type conductive magnetic yoke 2 bottom interior surfaces are combined closely, the magnet 3 upper surfaces magnetic pole core 4 of combining closely is between described magnet 3 and the U type conductive magnetic yoke 2, all adopt the adhesive gummed fixing between magnet 3 and the magnetic pole core 4; Leave certain magnetic gap between the inwall of the outer wall of described magnet 3 and magnetic pole core 4 and U type conductive magnetic yoke 2.
As Fig. 1, shown in Figure 3, the section of described U type conductive magnetic yoke 2 is the U type, its bottom is airtight, U type conductive magnetic yoke 2 bottom outer rims are provided with stopper slot 2a to the inboard, the mesopore 1a edge of the geomery of stopper slot 2a and basin frame 1 matches, thereby has improved the steadiness that U type conductive magnetic yoke 2 combines with the mesopore 1a of basin frame 1; The height of described stopper slot 2a is identical with the thickness of basin frame 1 bottom, thereby makes U type conductive magnetic yoke 2 bottom surfaces and basin frame 1 bottom surface be in same plane, has guaranteed that the integral thickness of magnetic circuit structure for loudspeaker is reasonable.
As Fig. 1～shown in Figure 3, the inner surface bottom centre of described U type conductive magnetic yoke 2 is provided with the boss 2b that raises up, and magnet 3 is combined closely at the top of boss 2b.Because magnet 3 price comparison height, the present invention has increased the bottom level of U type conductive magnetic yoke 2 by boss 2b is set, and has reduced the thickness of magnet, has saved cost under the prerequisite that keeps magnetic flux density.
Claims (5)
1. thin type speaker magnetic circuit, comprise basin frame (1), U type conductive magnetic yoke (2), magnet (3) and magnetic pole core (4), magnet (3) and magnetic pole core (4) are installed in the U type conductive magnetic yoke (2), magnet (3) lower surface and U type conductive magnetic yoke (2) bottom interior surface are combined closely, magnet (3) the upper surface magnetic pole core (4) of combining closely leaves certain magnetic gap between the outer wall of magnet (3) and magnetic pole core (4) and the inwall of U type conductive magnetic yoke (2); It is characterized in that: described basin frame (1) bottom centre offers mesopore (1a), and U type conductive magnetic yoke (2) is installed in the mesopore (1a), and U type conductive magnetic yoke (2) bottom surface and basin frame (1) bottom surface are in same plane.
2. thin type speaker magnetic circuit as claimed in claim 1, its feature also is: described U type conductive magnetic yoke (2) bottom outer rim is provided with stopper slot (2a) to the inboard, the geomery of stopper slot (2a) is corresponding identical with the mesopore (1a) of basin frame (1), and the height of stopper slot (2a) is identical with the thickness of basin frame (1) bottom.
3. thin type speaker magnetic circuit as claimed in claim 1, its feature also is: described U type conductive magnetic yoke (2) adopts interference fit to combine closely with the mesopore (1a) of basin frame (1) bottom.
4. thin type speaker magnetic circuit as claimed in claim 1, its feature also is: the inner surface bottom centre of described U type conductive magnetic yoke (2) is provided with the boss (2b) that raises up, and magnet (3) is combined closely at the top of boss (2b).
5. thin type speaker magnetic circuit as claimed in claim 1, its feature also is: between described magnet (3) and the U type conductive magnetic yoke (2), all adopt the adhesive gummed fixing between magnet (3) and the magnetic pole core (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010216907A CN101867857A (en) | 2010-06-24 | 2010-06-24 | Thin type speaker magnetic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010216907A CN101867857A (en) | 2010-06-24 | 2010-06-24 | Thin type speaker magnetic circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101867857A true CN101867857A (en) | 2010-10-20 |
Family
ID=42959371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010216907A Pending CN101867857A (en) | 2010-06-24 | 2010-06-24 | Thin type speaker magnetic circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101867857A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104053097A (en) * | 2014-06-25 | 2014-09-17 | 梧州恒声电子科技有限公司 | Improved speaker frame made of ultra-thin roll material |
| CN104270702A (en) * | 2014-09-17 | 2015-01-07 | 苏州瀚墨材料技术有限公司 | Supporting assisting system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201216016Y (en) * | 2008-07-02 | 2009-04-01 | 无锡杰夫电声有限公司 | Loudspeaker having reverse magnetic circuit structure |
| JP2009159740A (en) * | 2007-12-27 | 2009-07-16 | Yaskawa Electric Corp | Linear motor and table feeding apparatus with the same |
| CN201312378Y (en) * | 2008-08-22 | 2009-09-16 | 富祐鸿科技股份有限公司 | Thin trumpet heat radiator |
| CN201750539U (en) * | 2010-06-24 | 2011-02-16 | 无锡杰夫电声有限公司 | Magnetic circuit of thin type speaker |
-
2010
- 2010-06-24 CN CN201010216907A patent/CN101867857A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009159740A (en) * | 2007-12-27 | 2009-07-16 | Yaskawa Electric Corp | Linear motor and table feeding apparatus with the same |
| CN201216016Y (en) * | 2008-07-02 | 2009-04-01 | 无锡杰夫电声有限公司 | Loudspeaker having reverse magnetic circuit structure |
| CN201312378Y (en) * | 2008-08-22 | 2009-09-16 | 富祐鸿科技股份有限公司 | Thin trumpet heat radiator |
| CN201750539U (en) * | 2010-06-24 | 2011-02-16 | 无锡杰夫电声有限公司 | Magnetic circuit of thin type speaker |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104053097A (en) * | 2014-06-25 | 2014-09-17 | 梧州恒声电子科技有限公司 | Improved speaker frame made of ultra-thin roll material |
| CN104270702A (en) * | 2014-09-17 | 2015-01-07 | 苏州瀚墨材料技术有限公司 | Supporting assisting system |
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| PB01 | Publication | ||
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Application publication date: 20101020 |