CN101562768B - Minitype acoustic generator - Google Patents
Minitype acoustic generator Download PDFInfo
- Publication number
- CN101562768B CN101562768B CN 200910107474 CN200910107474A CN101562768B CN 101562768 B CN101562768 B CN 101562768B CN 200910107474 CN200910107474 CN 200910107474 CN 200910107474 A CN200910107474 A CN 200910107474A CN 101562768 B CN101562768 B CN 101562768B
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- pole piece
- magnet steel
- groove
- acoustic generator
- minitype acoustic
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Abstract
The invention provides a minitype acoustic generator, mainly comprising a base, a magnetic bowl embedded in the base, an alnico arranged in the magnetic bowl, a pole piece attached on the alnico, a coil arranged in the magnetic clearance formed by the magnetic bowl and the alnico, a vibration film connected with one end of the coil, and an upper cover; the upper cover and the base form a containing chamber commonly; the pole piece comprises a pole piece top surface and a pole piece side wall extending from the top surface of the pole piece; the alnico comprises an alnico top surface and an alnico side wall extending from the top surface of the alnico; and the side wall of the pole piece is provided with a first through trough and the position of the side wall of the alnico corresponding tothe first through trough is provided with a second through trough. The minitype acoustic generator improves the frequency response characteristic.
Description
Technical field
The present invention relates to a kind of minitype acoustic generator, relate in particular to a kind of minitype acoustic generator that is applied on the portable consumer electronic products such as mobile phone.
Background technology
Mini-sound device is widely used in the portable electronic equipments such as mobile phone, notebook computer, hearing aids.Along with fast development, the people of these portable electronic equipments are more and more stronger to its Functional Requirement, the mini-sound device that is applied thereon is corresponding rapidly development also.
The minitype acoustic generator of dependency structure mainly comprises such as bowl-shape pedestal, joins with pedestal and be provided with the loam cake in hole, and pedestal and loam cake form a cavity volume.Be provided with in this cavity volume and be contained in the pedestal and link to each other with pole piece, with the vibrating diaphragm of loam cake adjacency, with vibrating diaphragm with permanent magnet that pedestal forms magnetic gap and be suspended in voice coil loudspeaker voice coil in the described magnetic gap, be provided with the circuit board that realization links to each other with external circuit in the pedestal outside, the passing the hole that pedestal is provided with into and out of line and link to each other with circuit board of voice coil loudspeaker voice coil.When circuit board passed into the alternation tone currents, when passing into alternating current in the coil, voice coil loudspeaker voice coil can be because the effect in magnetic field produces motion in magnetic gap, variation along with electric current, this motion also can change thereupon, thereby drives the vibrating diaphragm up-down vibration, causes the generation of sound.
But for the improving product performance, the distance between pole piece and the voice coil loudspeaker voice coil is more and more less, and along with the increase of magnetic circuit area, vibrating diaphragm ball top area is also increasing, and can't provide enough leakages by the gap between pole piece and the voice coil loudspeaker voice coil, affects the intermediate frequency characteristics of product.
Thereby, be necessary to study a kind of Microspeaker with new construction.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of minitype acoustic generator that can improve Frequency Response.
For solving the problems of the technologies described above, technical scheme provided by the invention is:
A kind of minitype acoustic generator, it mainly comprises pedestal, be embedded in the magnetic bowl in the pedestal, be contained in the magnet steel in the magnetic bowl, post the pole piece on magnet steel, be arranged in the coil of the magnetic gap of magnetic bowl and magnet steel formation, be connected in the vibrating diaphragm of coil one end, and loam cake, this loam cake and pedestal form host cavity jointly, described pole piece comprises pole piece end face and the pole piece sidewall that extends of this pole piece end face certainly, magnet steel comprises magnet steel end face and the magnet steel sidewall that extends of this magnet steel end face certainly, offer the first groove at the pole piece sidewall, the position corresponding with this first groove at the magnet steel sidewall offers the second groove, and the first groove and the second groove can consist of leakage.
Preferably, be provided with the first through hole at the pole piece end face, the orthographic projection of this first through hole is at least partially in the described magnetic gap.
Preferably, described the first groove is two, and the second groove is two.
Preferably, described the first through hole is two.
Preferably, described pole piece is shaped as circle, track type or square.
Preferably, described magnet steel is shaped as the circle corresponding with pole piece, track type or square.
Beneficial effect of the present invention is: offer the first groove at the pole piece sidewall, magnet steel sidewall relevant position offers the second groove, so that form large space between pole piece and the voice coil loudspeaker voice coil, provides preferably leakage, thereby has improved the Frequency Response of minitype acoustic generator.
In a preferred embodiment of the invention, owing to offer the first through hole on the pole piece, the orthographic projection of this first through hole has been avoided perforate on magnet steel like this when leakage is provided in magnetic gap, reduced cost.
Description of drawings
Fig. 1 is the three-dimensional exploded view of an embodiment of minitype acoustic generator provided by the invention;
Fig. 2 is another embodiment perspective exploded view of minitype acoustic generator provided by the invention;
Fig. 3 is the enlarged drawing of A part among Fig. 2.
Embodiment
The invention will be further described below in conjunction with drawings and embodiments.
Referring to Fig. 1 and Fig. 2, minitype acoustic generator 1 of the present invention is mainly used on the portable consumer electronic products such as mobile phone, in order to the prompting of sounding.
In general, minitype acoustic generator mainly comprises such as bowl-shape pedestal, joins with pedestal and be provided with the loam cake in hole, and pedestal and loam cake form a cavity volume.Be provided with in this cavity volume and be contained in the pedestal and link to each other with pole piece, with the vibrating diaphragm of loam cake adjacency, with vibrating diaphragm with permanent magnet that pedestal forms magnetic gap and be suspended in voice coil loudspeaker voice coil in the described magnetic gap, be provided with the circuit board that realization links to each other with external circuit in the pedestal outside, the passing the hole that pedestal is provided with into and out of line and link to each other with circuit board of voice coil loudspeaker voice coil.When circuit board passed into the alternation tone currents, voice coil loudspeaker voice coil was subject to the motive force of alternation in magnetic gap, produced alternate motion, thereby drove the vibrating diaphragm vibration, sounded.
Please refer to the drawing 1 is depicted as the three-dimensional exploded view of the minitype acoustic generator 1 of one embodiment of the invention, this Microspeaker 1 comprises pedestal 11, be embedded in magnetic bowl 12 in the pedestal 11, be contained in magnet steel 13 in the magnetic bowl 12, post the vibrating diaphragm 16 that pole piece 14, part on magnet steel 13 is contained in coil 15 in the magnetic gap that magnetic bowl 12 and magnet steel 13 form, is connected in coil 15 1 ends, and forms host cavities and said elements is held wherein loam cake (not shown) with pedestal 11 is common.When passing into alternating current in the coil 15, the coil 15 that is in the magnetic gap can be because the effect in magnetic field produces motion, and along with the variation of electric current, this motion also can change thereupon, thereby drives vibrating diaphragm 16 up-down vibration, causes the generation of sound.
The first groove 141 can be 1,2 or more; What the second groove 131 was corresponding with the first groove can be 1,2 or more.
Referring to Fig. 3, be the three-dimensional exploded view of the minitype acoustic generator 2 of another embodiment provided by the invention.The structure of the structure of this minitype acoustic generator 2 and minitype acoustic generator 1 is basic identical, difference is: pole piece 24 comprises pole piece end face 243 and the pole piece sidewall 244 that extends of this pole piece end face 243 certainly, magnet steel 23 comprises magnet steel end face 233 and the magnet steel sidewall 234 that extends of this magnet steel end face 233 certainly, be provided with the first through hole 242 at pole piece end face 243, the orthographic projection of this first through hole 242 drops in the magnetic gap in whole or in part.That is to say that after pole piece 24 was fitted with magnet steel 23, the periphery of pole piece 24 was greater than the periphery of magnet steel 23, and the first through hole 242 just is arranged on the periphery of pole piece 24 greater than the outer peripheral portion of magnet steel 23.
The first through hole 242 can be one, also can be two, and is perhaps more.
Certainly, also above-mentioned two embodiment can be combined, that is: the pole piece sidewall had both been offered the first groove, was provided with the second groove at the magnet steel correspondence position, and the pole piece sidewall also is provided with through hole, and the orthographic projection of this through hole is in magnetic gap.
In above-mentioned all embodiment, the shape of pole piece can be circular, track type or square, and what magnet steel was corresponding is circular, track type or square.
Above-described only is embodiments of the present invention, should be pointed out that for the person of ordinary skill of the art at this, under the prerequisite that does not break away from the invention design, can also make improvement, but these all belongs to protection scope of the present invention.
Claims (6)
1. minitype acoustic generator, it mainly comprises pedestal, be embedded in the magnetic bowl in the pedestal, be contained in the magnet steel in the magnetic bowl, post the pole piece on magnet steel, be arranged in the coil of the magnetic gap of magnetic bowl and magnet steel formation, be connected in the vibrating diaphragm of coil one end, and loam cake, this loam cake and pedestal form host cavity jointly, it is characterized in that: described pole piece comprises pole piece end face and the pole piece sidewall that extends of this pole piece end face certainly, magnet steel comprises magnet steel end face and the magnet steel sidewall that extends of this magnet steel end face certainly, offer the first groove at the pole piece sidewall, the position corresponding with this first groove at the magnet steel sidewall offers the second groove, and the first groove and the second groove can consist of leakage.
2. minitype acoustic generator according to claim 1, it is characterized in that: be provided with the first through hole at the pole piece end face, the orthographic projection of this first through hole is at least partially in the described magnetic gap.
3. minitype acoustic generator according to claim 1, it is characterized in that: described the first groove is two, the second groove is two.
4. minitype acoustic generator according to claim 2, it is characterized in that: described the first through hole is two.
5. minitype acoustic generator according to claim 1 is characterized in that: described pole piece be shaped as circle, track type or square.
6. minitype acoustic generator according to claim 5 is characterized in that: described magnet steel be shaped as the circle corresponding with pole piece, track type or square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910107474 CN101562768B (en) | 2009-05-22 | 2009-05-22 | Minitype acoustic generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910107474 CN101562768B (en) | 2009-05-22 | 2009-05-22 | Minitype acoustic generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101562768A CN101562768A (en) | 2009-10-21 |
| CN101562768B true CN101562768B (en) | 2013-04-10 |
Family
ID=41221352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910107474 Expired - Fee Related CN101562768B (en) | 2009-05-22 | 2009-05-22 | Minitype acoustic generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101562768B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211019207U (en) * | 2019-12-04 | 2020-07-14 | 瑞声科技(新加坡)有限公司 | Sound production device |
| CN111327998A (en) * | 2020-02-25 | 2020-06-23 | 瑞声科技(新加坡)有限公司 | Sound production device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1273016A (en) * | 1998-06-18 | 2000-11-08 | 松下电器产业株式会社 | Loundspeaker |
| CN1668140A (en) * | 2004-03-11 | 2005-09-14 | 星电株式会社 | Speaker |
| CN2857391Y (en) * | 2005-11-12 | 2007-01-10 | 常州美欧电子有限公司 | Magnetic circuit system and moving-coil electroacoustic transducer adopting the same |
| KR100781085B1 (en) * | 2006-08-03 | 2007-11-30 | 주식회사 한국토프톤 | A slim speaker is damper |
-
2009
- 2009-05-22 CN CN 200910107474 patent/CN101562768B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1273016A (en) * | 1998-06-18 | 2000-11-08 | 松下电器产业株式会社 | Loundspeaker |
| CN1668140A (en) * | 2004-03-11 | 2005-09-14 | 星电株式会社 | Speaker |
| CN2857391Y (en) * | 2005-11-12 | 2007-01-10 | 常州美欧电子有限公司 | Magnetic circuit system and moving-coil electroacoustic transducer adopting the same |
| KR100781085B1 (en) * | 2006-08-03 | 2007-11-30 | 주식회사 한국토프톤 | A slim speaker is damper |
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| Publication number | Publication date |
|---|---|
| CN101562768A (en) | 2009-10-21 |
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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 | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: AAC Optoelectronic (Changzhou) Co., Ltd. Assignor: Rui sound technology (Shenzhen) Co., Ltd.|Rui acoustic technology (Changzhou) Co., Ltd. Contract record no.: 2011990000444 Denomination of invention: Manufacturing method of minitype acoustical generator License type: Exclusive License Open date: 20091021 Record date: 20110609 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170526 Address after: Singapore Ang Mo Kio 65 Street No. 10 techpoint Building 1 floor, No. 8 Co-patentee after: AAC Acoustic Technologies (Changzhou) Co., Ltd. Patentee after: AAC Technologies (Singapore) Co., Ltd. Address before: 518057 Nanshan District province high tech Industrial Park, Shenzhen, North West New Road, No. 18 Co-patentee before: AAC Acoustic Technologies (Changzhou) Co., Ltd. Patentee before: AAC Acoustic Technologies (Shenzhen) Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20210522 |
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| CF01 | Termination of patent right due to non-payment of annual fee |