CN209659605U - Mini-sound device - Google Patents
Mini-sound device Download PDFInfo
- Publication number
- CN209659605U CN209659605U CN201920553499.7U CN201920553499U CN209659605U CN 209659605 U CN209659605 U CN 209659605U CN 201920553499 U CN201920553499 U CN 201920553499U CN 209659605 U CN209659605 U CN 209659605U
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- Prior art keywords
- magnet steel
- magnetic
- voice coil
- pole core
- mini
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Abstract
The utility model provides a kind of mini-sound device, including vibrational system and magnetic circuit system, vibrational system includes the voice coil of sound film and driving sound film vibration sounding, the magnetic circuit system includes main magnet steel and the secondary magnet steel around the setting of the periphery of main magnet steel, main magnet steel and secondary magnet steel interval are arranged to form magnetic gap, voice coil is inserted in magnetic gap, main magnet steel and secondary magnet steel vertically magnetize and contrary, magnetic circuit system further includes the side magnet steel and consequent pole core being stacked above secondary magnet steel respectively, consequent pole core be located between magnet steel and voice coil and while magnet steel abutted against with consequent pole core；Side magnet steel laterally magnetizes, and the magnetic pole on the magnet steel of side close to consequent pole core side is identical close to the magnetic pole of consequent pole core side as on secondary magnet steel, and the resigning portion that promising sound film vibration is stepped down is arranged close to voice coil side for side magnet steel.The mini-sound device of the utility model has biggish oscillation space, while can guarantee the BL value met the requirements.
Description
[technical field]
The utility model relates to electroacoustic switch technology fields, particularly, are related to a kind of mini-sound device.
[background technique]
In recent years, Information technology is grown rapidly, and the popularity rate of audio frequency apparatus is higher and higher, requirement of the people to audio frequency apparatus
It is not limited only to the broadcasting of video/audio, more the reliability of audio frequency apparatus is proposed more to require, the especially arrival in 3G epoch,
Technology of Mobile Multimedia also develops therewith, and many audio frequency apparatuses have a variety of amusement functions, such as video playing, digital vedio recording, trip
Play, GPS navigation etc. require that the electronic component in audio frequency apparatus is more and more accurate and compact.In audio frequency apparatus, miniature hair
Acoustic device is a kind of common electronic component, is mainly used for the broadcasting of audio signal, and structure design directly affects audio and broadcasts
Put quality.
The mini-sound device of the relevant technologies generally includes vibrational system and magnetic circuit system.With main magnet steel and secondary magnet steel
Magnetic circuit system in (such as tool there are three or the magnetic circuit system of five magnet steel in), secondary magnet steel and main magnet steel are all using vertically filling
Magnetic, and vertically height is identical with main magnet steel for secondary magnet steel.When being arranged using this kind, the magnetic circuit of magnetic circuit system is inefficient.
To guarantee that BL (magnetic force) value of the magnetic circuit system meets condition, the mini-sound device of the relevant technologies has vertical upper length longer
Voice coil, will lead in the case where identical size, the oscillation space of this kind of mini-sound device is smaller.
Therefore, it is necessary to provide the novel mini-sound device of one kind to overcome drawbacks described above.
[utility model content]
Minitype acoustic generator high-efficient the purpose of this utility model is to provide a kind of magnetic circuit and with larger vibration space
Part.
The technical solution of the utility model is as follows: a kind of mini-sound device, including vibrational system and magnetic circuit system are provided,
The vibrational system includes sound film and the voice coil for driving the sound film vibration sounding, and the magnetic circuit system includes main magnet steel and surround
The secondary magnet steel of the periphery setting of the main magnet steel, the main magnet steel and the secondary magnet steel interval are arranged to form magnetic gap, the sound
Circle is inserted in the magnetic gap, and the main magnet steel and the secondary magnet steel vertically magnetize and contrary；The magnetic circuit system is also
Including the side magnet steel and consequent pole core being stacked above the secondary magnet steel respectively；The consequent pole core is located at the side magnet steel and the sound
Between circle and the side magnet steel is abutted against with the consequent pole core；The side magnet steel laterally magnetizes, close to described on the side magnet steel
The magnetic pole of consequent pole core side is identical close to the magnetic pole of consequent pole core side as on the secondary magnet steel；The consequent pole core includes folded sets
Main part above the secondary magnet steel and the protrusion extended from the main part towards sound film direction, the side magnet steel lean on
The resigning portion that the promising sound film vibration is stepped down is arranged in the nearly voice coil side, and the protrusion is bonded the resigning portion and extends；
Along direction of vibration, the shortest distance of the protrusion close to the voice coil side to the sound film is more than or equal to the side magnet steel and leans on
The nearly voice coil side to the sound film the shortest distance.
Preferably, the main part is connect in obtuse angle with the protrusion.
Preferably, the resigning portion is along the inclined-plane that direction of vibration tilts down.
Preferably, the protrusion is set as being bonded the parallelogram prism that the resigning portion extends.
Preferably, the magnetic circuit system further includes the main pole core being stacked above the main magnet steel.
Preferably, the magnetic circuit system further includes the magnetic bowl positioned at bottom, and the main magnet steel is set among the magnetic bowl
Position, the pair magnet steel are set to magnetic bowl edge position.
Preferably, the consequent pole core is provided around the ring structure of the voice coil, further includes connecting the main part
Interconnecting piece and groove positioned at the main part far from the voice coil side, the side magnet steel be placed in the groove.
The utility model has the beneficial effects that: the side magnet steel that (1) is laterally magnetized by setting, and side magnet steel can be with magnetic circuit
Other magnet steel in system form complete magnetic loop, enhance the magnetic field strength of the magnetic gap where voice coil, improve magnetic circuit effect
Rate simultaneously improves the BL value of magnetic circuit system, and the mini-sound device under identical input voltage is made to have higher sound sensitive
Degree；
(2) be arranged in while magnet steel close to voice coil side consequent pole core with while magnet steel abut against, effective support edge magnet steel, and
Consequent pole core includes the protrusion that main body extends towards sound film direction, and the resigning portion that protrusion is bonded side magnet steel extends, further
The glue area for increasing consequent pole core Yu side magnet steel, effectively prevents mini-sound device in drop test, secondary magnet steel and
Side magnet steel is impacted and is separated；
(3) the side magnet steel laterally to magnetize can make the magnetic field strength of entire oscillation space become larger, and voice coil can be realized vertically
Shorter length；And the resigning portion that promising sound film vibration is stepped down is arranged close to voice coil side for side magnet steel, while along direction of vibration, institute
It states the shortest distance of the protrusion close to the voice coil side to the sound film and is more than or equal to the side magnet steel close to the voice coil one
Side to the sound film the shortest distance, it is ensured that when shaking under sound film, either side magnet steel or protrusion will not with sound film
It interferes.Therefore, compared to conventional mini-sound device, the mini-sound device of the utility model has biggish vibration empty
Between, while can guarantee the BL value met the requirements.
[Detailed description of the invention]
Fig. 1 is the stereogram exploded view of the mini-sound device of the utility model；
Fig. 2 is the three-dimensional assembly diagram of the mini-sound device in Fig. 1；
Fig. 3 is cross-sectional view of the mini-sound device in Fig. 2 along line A-A；
Fig. 4 is the cross-sectional view along line A-A of another embodiment of mini-sound device in Fig. 2；
Fig. 5 is the part magnetic line of force schematic diagram of the mini-sound device in Fig. 3；
Fig. 6 is the structural schematic diagram of the side magnet steel of the utility model；
Fig. 7 is the structural schematic diagram of the consequent pole core of the utility model；
Fig. 8 is the consequent pole core of the utility model and the assembling schematic diagram of side magnet steel.
[specific embodiment]
The utility model is described in further detail with embodiment with reference to the accompanying drawing.
Fig. 1-8 shows the mini-sound device of the utility model.As shown in Figs. 1-2, this kind of mini-sound device be substantially
Include above frame 1, be fixed on the vibrational system 2 of the frame 1 and be partially housed in the magnetic circuit system 3 of the frame 1, the vibration
Dynamic system 2 includes sound film 21 and the voice coil 22 for driving 21 vibration sounding of sound film, and the magnetic circuit system 3 includes main 31 He of magnet steel
The secondary magnet steel 32 being arranged around the periphery of the main magnet steel 31, the main magnet steel 31 form magnetic with the secondary interval of magnet steel 32 setting
Gap 33, the voice coil 22 are inserted in the magnetic gap 33, the main magnet steel 31 and secondary magnet steel 32 vertically magnetizes and side
To opposite；Refer to that the direction of vibration (i.e. Z-direction in Fig. 3) along vibrational system 2 magnetizes it should be noted that vertically magnetizing, in this reality
It applies in example, the magnetizing direction of the main magnet steel 31 is -Z direction, and the magnetizing direction of the pair magnet steel 32 is +Z direction.
The magnetic circuit system 3 further includes the side magnet steel 34 and consequent pole core 35 for being stacked at 32 top of secondary magnet steel respectively；Institute
It states consequent pole core 35 and is located at the magnet steel 34 between magnet steel 34 and the voice coil 22 and while described and abutted against with the consequent pole core 35；
In the present embodiment, the side magnet steel 34 and consequent pole core 35 is placed side by side and glued connection between the two, the consequent pole core
35 provide support for the side magnet steel 34；Further, the consequent pole core 35 includes the master for being stacked at 32 top of secondary magnet steel
Body portion 351 and the protrusion 354 extended from the main part 351 towards 21 direction of sound film, the protrusion 354 are bonded described
Side magnet steel 34 extends, and increases the glue area of the consequent pole core 35 and side magnet steel 34, effectively prevents mini-sound device from existing
Side magnet steel described in falling process 34 falls off because of impact and the secondary magnet steel 32.In other alternative-embodiments, the magnetic circuit
System 3 further includes the main pole core 36 for being stacked at 31 top of main magnet steel, and the consequent pole core 35 and the main pole core 36 are by magnetic conduction
Material is made, and plays the role of magnetic conduction.
The side magnet steel 34 laterally magnetizes, it should be noted that laterally magnetizes and refers to along perpendicular to the vibrational system 2
Direction of vibration (i.e. X to) in Fig. 3 magnetize.Magnetic pole and the pair on the side magnet steel 34 close to 35 side of consequent pole core
Magnetic pole on magnet steel 32 close to 35 side of consequent pole core is identical.In the present embodiment, as shown in figure 3, the side magnet steel 34
Magnetizing direction is directed toward the geometric center of the voice coil 22, i.e., the magnetic pole of close 35 side of consequent pole core is on the described side magnet steel 34
The pole N close to the magnetic pole of 35 side of consequent pole core is also the pole N on the pair magnet steel 32.In other alternative-embodiments, as schemed
Shown in 4, the magnetizing direction of the side magnet steel 34 backwards to the voice coil 22 geometric center, i.e., close to described on the described side magnet steel 34
The magnetic pole of 35 side of consequent pole core is the pole S, and the magnetizing direction for corresponding to the main magnet steel 31 at this time is +Z direction, the pair magnet steel 32
Magnetizing direction be -Z direction, i.e., the magnetic pole on the described main magnet steel 31 close to 36 side of main pole core is the pole N, the pair magnet steel
Magnetic pole on 32 close to 35 side of consequent pole core is the pole S.
In the present embodiment, as shown in fig. 6, the promising sound film is arranged close to 22 side of voice coil in the side magnet steel 34
The resigning portion 341 that 21 vibrations are stepped down, along direction of vibration, the protrusion 354 is close to 22 side of voice coil to the sound film 21
The shortest distance be h1, the shortest distance of the side magnet steel 34 close to 22 side of voice coil to the sound film 21 is h2, preferably
, h1≥h2.When sound film 21 is lower to shake, due to the presence of resigning portion 341, side magnet steel 34 will not be interfered with sound film 21, together
When, the shortest distance of protrusion 354 to sound film 21 is more than or equal to the shortest distance that side magnet steel 34 arrives sound film 21, it is ensured that protrusion
354 will not interfere with sound film 21, so that mini-sound device is while the BL value for guaranteeing to meet the requirements with larger
Oscillation space.The protrusion 354 is bonded the resigning portion 341 and extends, and increases the consequent pole core 35 and side magnet steel 34
Glue area effectively prevents mini-sound device side magnet steel 34 described in falling process de- because of impact and the secondary magnet steel 32
It falls.Preferably, the main part 351 is connect in obtuse angle with the protrusion 354.
In the present embodiment, as shown in figure 3, the resigning portion 341 is set as along the downward (i.e.-Z in Fig. 3 of direction of vibration
Direction) inclination and towards the inclined-plane of the sound film 21, and protrusion 354 is then set as being bonded the resigning portion 341 and extend in parallel
Parallelogram prism；In other optional embodiments, resigning portion 341 is set as along in 21 direction of sound film
Concave surface recessed and towards the sound film 21, and protrusion 354 is then set as being bonded the curved rib that the resigning portion 341 extends in parallel
Column.
In the present embodiment, the magnetic circuit system 3 further includes the magnetic bowl 37 positioned at bottom, and the main magnet steel 31 is set to institute
37 middle position of magnetic bowl is stated, the pair magnet steel 32 is set to 37 marginal position of magnetic bowl, at this point, due to being provided with magnetic bowl 37,
The magnetic line of force that can be generated to the secondary magnet steel 32 with the main magnet steel 31 carries out magnetic conduction, makes the complete magnetic loop of product formation, by
This can guarantee required BL value.
In another optional embodiment, as shown in fig. 7, the consequent pole core 35 is provided around the annular of the voice coil 22
Structure further includes connecting the interconnecting piece 352 of the main part 351 and being located at the main part 351 far from the voice coil side
Groove 353, the side magnet steel is placed in the groove 353.The vibrational system 2 further includes flexible circuit board 23 and lower sound
Film 24, the flexible circuit board 23 are fixedly connected with the interconnecting piece 352, and the lower sound film 24 is oppositely arranged with the sound film 21
And it is fixed on 23 lower section of flexible circuit board.
Fig. 5 shows the part magnetic line of force of the mini-sound device with pole orientation shown in Fig. 3.As shown in figure 5, this
It is provided with the side magnet steel 34 laterally to magnetize in embodiment, can produce the magnetic line of force for being essentially perpendicular to voice coil 22；Cooperation is vertical
The magnetic line of force that the main magnet steel 31 and secondary magnet steel 32 to magnetize generates, thus can form a complete magnetic loop, make 22 place of voice coil
The magnetic field strength of magnetic gap 33 greatly improve, and then BL value can be greatly promoted.Therefore, compared to conventional mini-sound device,
Voice coil 22 in the present embodiment can vertically realize shorter length, while can guarantee the BL value met the requirements.At this point, in phase
Under same size, the mini-sound device in the present embodiment will have bigger oscillation space, and can realize higher sound spirit
Sensitivity.
Above-described is only the embodiments of the present invention, it should be noted here that for the ordinary skill of this field
For personnel, without departing from the concept of the present invention, improvement can also be made, but these belong to it is practical
Novel protection scope.
Claims (7)
1. a kind of mini-sound device, including vibrational system and magnetic circuit system, the vibrational system includes described in sound film and driving
The voice coil of sound film vibration sounding, the magnetic circuit system include the secondary magnet steel of the periphery setting of main magnet steel and the circular main magnet steel,
The main magnet steel and the secondary magnet steel interval are arranged to form magnetic gap, and the voice coil is inserted in the magnetic gap, the main magnetic
Steel and the secondary magnet steel vertically magnetize and contrary, which is characterized in that the magnetic circuit system further include be stacked at respectively it is described
Side magnet steel and consequent pole core above secondary magnet steel, the consequent pole core are located at the magnet steel between magnet steel and the voice coil and while described
It is abutted against with the consequent pole core；The side magnet steel laterally magnetizes, on the side magnet steel close to consequent pole core side magnetic pole with
Magnetic pole on the pair magnet steel close to consequent pole core side is identical；
The consequent pole core includes the main part being stacked above the secondary magnet steel and prolongs from the main part towards sound film direction
The protrusion stretched, the resigning portion that the promising sound film vibration is stepped down is arranged close to the voice coil side for the side magnet steel, described convex
Portion is bonded the resigning portion and extends out；Along direction of vibration, the protrusion is most short close to the voice coil side to the sound film
Distance is more than or equal to the side magnet steel close to the voice coil side to the shortest distance of the sound film.
2. mini-sound device according to claim 1, which is characterized in that the main part and the protrusion are in obtuse angle
Connection.
3. mini-sound device according to claim 1, which is characterized in that the resigning portion is to dip down along direction of vibration
Oblique inclined-plane.
4. mini-sound device according to claim 3, which is characterized in that the protrusion is set as being bonded the resigning
The parallelogram prism that portion extends in parallel.
5. mini-sound device according to claim 1, which is characterized in that the magnetic circuit system further include be stacked at it is described
Main pole core above main magnet steel.
6. mini-sound device according to claim 1, which is characterized in that the magnetic circuit system further includes being located at bottom
Magnetic bowl, the main magnet steel are set to magnetic bowl middle position, and the pair magnet steel is set to magnetic bowl edge position.
7. mini-sound device according to claim 1, which is characterized in that the consequent pole core is provided around the voice coil
Ring structure, further include connecting the interconnecting piece of the main part and positioned at the main part far from the recessed of the voice coil side
Slot, the side magnet steel are placed in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920553499.7U CN209659605U (en) | 2019-04-22 | 2019-04-22 | Mini-sound device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920553499.7U CN209659605U (en) | 2019-04-22 | 2019-04-22 | Mini-sound device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209659605U true CN209659605U (en) | 2019-11-19 |
Family
ID=68529522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920553499.7U Expired - Fee Related CN209659605U (en) | 2019-04-22 | 2019-04-22 | Mini-sound device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209659605U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111935607A (en) * | 2020-09-03 | 2020-11-13 | 精拓丽音科技（北京）有限公司 | Electroacoustic conversion device and electronic equipment |
| CN113660589A (en) * | 2021-08-31 | 2021-11-16 | 歌尔股份有限公司 | Sound production device for electronic device and electronic device |
-
2019
- 2019-04-22 CN CN201920553499.7U patent/CN209659605U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111935607A (en) * | 2020-09-03 | 2020-11-13 | 精拓丽音科技（北京）有限公司 | Electroacoustic conversion device and electronic equipment |
| CN113660589A (en) * | 2021-08-31 | 2021-11-16 | 歌尔股份有限公司 | Sound production device for electronic device and electronic device |
| CN113660589B (en) * | 2021-08-31 | 2024-03-12 | 歌尔股份有限公司 | Sounding device for electronic device and electronic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191119 |