CN201533401U - Magnetic circuit system and miniature acoustic generator using same - Google Patents
Magnetic circuit system and miniature acoustic generator using same Download PDFInfo
- Publication number
- CN201533401U CN201533401U CN2009202050476U CN200920205047U CN201533401U CN 201533401 U CN201533401 U CN 201533401U CN 2009202050476 U CN2009202050476 U CN 2009202050476U CN 200920205047 U CN200920205047 U CN 200920205047U CN 201533401 U CN201533401 U CN 201533401U
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- magnet steel
- lower plate
- magnetic circuit
- circuit system
- axis direction
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Abstract
The utility model provides a miniature acoustic generator and a magnetic circuit system applied therein, wherein the magnetic circuit system consists of a lower clamp plate, and a central magnetic steel fixed on the lower clamp plate, wherein the central magnetic steel comprises a first side wall in the long axis direction and a second side wall in the short axis direction; the lower clamp plate is provided with a peripheral magnetic steel relative to the first side wall and spacing a certain distance; the lower clamp plate is provided with a long side along the long axis direction and a short side along the short axis direction; and the lower clamp plate is provided with a barrier wall only at the short side, and the barrier wall extends out from the lower clamp plate and is vertical to the lower clamp plate. Compared with the prior art, the barrier wall provided by the utility model can avoid the problem of magnetic field leakage of the central magnetic steel generated in the short axis direction, and also can play the roles of conducting magnetism and improving the magnetic field intensity.
Description
[technical field]
The utility model relates to the magnetic circuit system of a kind of minitype acoustic generator and use thereof.
[background technology]
Minitype acoustic generator is widely used on 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 also corresponding development apace of the mini-sound device that is applied thereon.
The minitype acoustic generator of dependency structure comprises as depicted in figs. 1 and 2: vibrational system, magnetic circuit system and accommodate vibrational system and the basin frame 10 of magnetic circuit system and loam cake 11.The vibrational system involving vibrations is to sound and by the vibrating diaphragm 12 of basin frame 10 supporting, the voice coil loudspeaker voice coil 13 that drives vibrating diaphragm 12 vibrations and be attached thereto.Magnetic circuit system comprises lower plate 14, all is fixed in three bar shaped magnet steel on the lower plate and be positioned at 17, three the bar shaped magnet steel of pole piece that are used for magnetic conduction on three bar shaped magnet steel and comprise center magnet steel 15, is positioned at center magnet steel long axis direction Z
1Two peripheral magnet steel 16 of both sides.Because lower plate 14 is a slab construction, causes the short-axis direction Z of center magnet steel
2Both sides be opening-wide state, thereby make the both sides of center magnet steel short-axis direction of the magnetic circuit system of this structure have serious leakage magnetic field problem, influenced the sensitivity of whole minitype acoustic generator product.
Thereby, be necessary to study a kind of new magnetic circuit system structure to avoid above-mentioned problem.
[utility model content]
The technical problem that the utility model need solve provides a kind of leakage magnetic field of avoiding, highly sensitive minitype acoustic generator and magnetic circuit system wherein.
According to the above-mentioned technical problem that needs solution, designed a kind of magnetic circuit system, comprise lower plate, be fixed in the center magnet steel on the lower plate, described center magnet steel comprises the first side wall on the long axis direction and second sidewall on the short-axis direction, on lower plate, be provided with peripheral magnet steel relative with the first side wall and that keep at a certain distance away, lower plate is provided with along the long limit of long axis direction and along the minor face of short-axis direction, and lower plate only extends on lower plate and perpendicular to the retaining wall of lower plate being provided with on the minor face.
Further improve as the utility model, described peripheral magnet steel is provided with the fool proof inclination angle away from the outside of center magnet steel.
Further improve as the utility model, be respectively equipped with the pole piece that is used for magnetic conduction on center magnet steel and peripheral magnet steel, the shape of each pole piece is identical with corresponding with it magnet steel shape.
Further improve as the utility model, the top periphery that is positioned at the pole piece on the magnet steel of center is provided with the short slot on this top of continued circling.
According to the above-mentioned technical problem that needs solution, the utility model has also designed a kind of minitype acoustic generator that uses above-mentioned magnetic circuit system, the involving vibrations system, magnetic circuit system, accommodate the basin frame and the loam cake of magnetic circuit system and vibrational system, described vibrational system comprises vibrating diaphragm that links to each other with the basin frame and the voice coil loudspeaker voice coil that links to each other with vibrating diaphragm, described magnetic circuit system comprises lower plate, be fixed in the center magnet steel on the lower plate, described center magnet steel comprises the first side wall on the long axis direction, with second sidewall on the short-axis direction, on lower plate, be provided with peripheral magnet steel relative with the first side wall and that keep at a certain distance away, on lower plate, extend and the retaining wall relative also being provided with on the lower plate with second sidewall.
Compared with prior art, the retaining wall that the utility model is provided with can avoid the center magnet steel to produce the problem of leakage magnetic field on short-axis direction, and, retaining wall also can play the effect of magnetic conduction, to improve the magnetic field intensity of center magnet steel on short-axis direction, thereby, the sensitivity that has improved whole minitype acoustic generator product.
[description of drawings]
Fig. 1 is the cross-sectional schematic of relevant minitype acoustic generator;
Fig. 2 is the schematic perspective view of the magnetic circuit system in the relevant minitype acoustic generator;
Fig. 3 is the schematic perspective view of the utility model minitype acoustic generator;
Fig. 4 is the cross-sectional schematic of B-B direction among Fig. 3;
Fig. 5 is the three-dimensional exploded view before Fig. 3 assembles.
[embodiment]
The utility model is described in further detail below in conjunction with drawings and embodiments.
To shown in Figure 4, minitype acoustic generator 2 of the present utility model comprises magnetic circuit system, vibrational system and accommodates and support the basin frame 20 and the loam cake 21 of magnetic circuit system and vibrational system as Fig. 3.Loam cake 21 is formed receiving space to accommodate vibrational system and magnetic circuit system with basin frame 20.
Vibrational system comprises vibrating diaphragm 22 and voice coil loudspeaker voice coil 23, the edge of vibrating diaphragm 22 links to each other with loam cake 21 edges, and be fixed on the basin frame 20, vibrating diaphragm 22 comprises astrosphere top portion 220 and around astrosphere top portion and the soft ring part 221 that is attached thereto, and voice coil loudspeaker voice coil 23 is connected on astrosphere top portion and the position that soft ring partly links to each other.The shape of voice coil loudspeaker voice coil can be circle, rectangle like or runway shape.Vibrating diaphragm also can be circle, rectangle like or runway shape.
As shown in Figure 5, magnetic circuit system comprises lower plate 24, all is fixed in three magnet steel on the lower plate, also is provided with the pole piece of form fit with it on three magnet steel.Three magnet steel comprise between center magnet steel 25 and 26, three magnet steel of two peripheral magnet steel and are formed with magnetic gap 27.This center magnet steel 25 comprises long axis direction Z
3On the first side wall 252 and short-axis direction Z
4On second sidewall 253.Two peripheral magnet steel 26 are relative with the first side wall 252 of center magnet steel respectively and keep at a certain distance away, that is, two peripheral magnet steel lay respectively at the both sides of center magnet steel long axis direction.Lower plate 24 is provided with along long axis direction Z
3 Long limit 241 and along short-axis direction Z
4Minor face 242.This lower plate only is provided with on minor face 242 and extends on lower plate and perpendicular to the retaining wall 240 of lower plate, and retaining wall 240 and center magnet steel second sidewall 253 is relative and keep at a certain distance away.Promptly, retaining wall 240 on the lower plate 24 is positioned at the both sides of center magnet steel short-axis direction, can avoid center magnet steel both sides on short-axis direction that the problem of leakage magnetic field takes place like this, and retaining wall 240 can also play the effect of magnetic conduction, add the magnetic field intensity of strong center magnet steel on short-axis direction, thereby improved the sensitivity of minitype acoustic generator product.
As shown in Figure 4, the part of voice coil loudspeaker voice coil 23 is suspended in the magnetic gap 27, the soft ring 221 of the vibrating diaphragm 22 that links to each other with voice coil loudspeaker voice coil is closer from peripheral magnetic circuit 26, for preventing that vibrating diaphragm from colliding the pole piece 260 on the peripheral magnet steel when vibrating, so the height of peripheral magnet steel of the present utility model is lower than the height of center magnet steel, more excellent is, for the ball top portion 220 that prevents vibrating diaphragm 22 collides center magnet steel 25 superior pole pieces 250, so the end periphery of the pole piece 250 on the magnet steel of center is provided with the short slot 251 of its end of continued circling.The magnetic circuit system of this structural design is that the space has been got out of the way in the vibrating diaphragm vibration, when vibrating diaphragm vibrates, can not collide magnetic circuit system, thereby not having bad sound takes place, improved the pure tone effect of product, and the height that need not increase product solves the problem that vibrating diaphragm collides magnetic circuit system, can make the product size microminiaturization.
Be provided with fool proof inclination angle 261 at two peripheral magnet steel 26 away from the outside of center magnet steel, to prevent to assemble the wrong direction of peripheral magnet steel fashionable dress.
Above-described only is execution mode of the present utility model; 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 utility model creation design; can also make improvement, but these all belong to protection range of the present utility model.
Claims (5)
1. magnetic circuit system, comprise lower plate, be fixed in the center magnet steel on the lower plate, described center magnet steel comprises the first side wall on the long axis direction and second sidewall on the short-axis direction, on lower plate, be provided with peripheral magnet steel relative with the first side wall and that keep at a certain distance away, it is characterized in that: lower plate is provided with along the long limit of long axis direction and along the minor face of short-axis direction, and lower plate only extends on lower plate and perpendicular to the retaining wall of lower plate being provided with on the minor face.
2. magnetic circuit system according to claim 1 is characterized in that: described peripheral magnet steel is provided with the fool proof inclination angle away from the outside of center magnet steel.
3. magnetic circuit system according to claim 1 is characterized in that: be respectively equipped with the pole piece that is used for magnetic conduction on center magnet steel and peripheral magnet steel, the shape of each pole piece is identical with corresponding with it magnet steel shape.
4. magnetic circuit system according to claim 3 is characterized in that: the top periphery that is positioned at the pole piece on the magnet steel of center is provided with the short slot on this top of continued circling.
5. minitype acoustic generator that uses magnetic circuit system as claimed in claim 1, the involving vibrations system, magnetic circuit system, accommodate the basin frame and the loam cake of magnetic circuit system and vibrational system, described vibrational system comprises vibrating diaphragm that links to each other with the basin frame and the voice coil loudspeaker voice coil that links to each other with vibrating diaphragm, described magnetic circuit system comprises lower plate, be fixed in the center magnet steel on the lower plate, described center magnet steel comprises the first side wall on the long axis direction, with second sidewall on the short-axis direction, on lower plate, be provided with peripheral magnet steel relative with the first side wall and that keep at a certain distance away, it is characterized in that: on lower plate, extend and the retaining wall relative also being provided with on the lower plate with second sidewall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202050476U CN201533401U (en) | 2009-09-21 | 2009-09-21 | Magnetic circuit system and miniature acoustic generator using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202050476U CN201533401U (en) | 2009-09-21 | 2009-09-21 | Magnetic circuit system and miniature acoustic generator using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201533401U true CN201533401U (en) | 2010-07-21 |
Family
ID=42528799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202050476U Expired - Lifetime CN201533401U (en) | 2009-09-21 | 2009-09-21 | Magnetic circuit system and miniature acoustic generator using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201533401U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102056059A (en) * | 2011-01-05 | 2011-05-11 | 瑞声声学科技(深圳)有限公司 | Multifunctional acoustic generator |
| CN114143680A (en) * | 2020-12-24 | 2022-03-04 | 东莞顺合丰电业有限公司 | Double-sided loudspeaker |
-
2009
- 2009-09-21 CN CN2009202050476U patent/CN201533401U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102056059A (en) * | 2011-01-05 | 2011-05-11 | 瑞声声学科技(深圳)有限公司 | Multifunctional acoustic generator |
| CN114143680A (en) * | 2020-12-24 | 2022-03-04 | 东莞顺合丰电业有限公司 | Double-sided loudspeaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100721 |