CN209659604U - Mini-sound device - Google Patents
Mini-sound device Download PDFInfo
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- CN209659604U CN209659604U CN201920553497.8U CN201920553497U CN209659604U CN 209659604 U CN209659604 U CN 209659604U CN 201920553497 U CN201920553497 U CN 201920553497U CN 209659604 U CN209659604 U CN 209659604U
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- magnet steel
- magnetic
- pole core
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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, 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, consequent pole core includes the protrusion for being stacked at main part above secondary magnet steel and main body and extending towards sound film direction, and protrusion is bonded side magnet steel and extends.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 being stacked at main part above the secondary magnet steel and from the main part towards the sound film side
To the protrusion of extension, the protrusion is bonded the side magnet steel and extends.
Preferably, the main part is at right angles connect with the protrusion.
Preferably, the sound film includes middle part, around the ring portion of the middle part and from the ring portion to extension
Stretch and surround the fixed part in the ring portion, the ring portion include the inward flange being connect with the middle part and with the fixation
The outer edge of portion's connection, distance of the side magnet steel close to the voice coil side to the inward flange are more than or equal to the inward flange
To the half of the outer edge distance.
Preferably, along direction of vibration, the protrusion is greater than close to the shortest distance of the voice coil side to the sound film
Equal to the side magnet steel close to the voice coil side to the shortest distance of the sound film.
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.
Preferably, the fixed part is connect with the side magnet steel.
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 protrusion is bonded side magnet steel and extends, and further increases pair
The glue area of pole piece and side magnet steel, effectively prevent mini-sound device in drop test secondary magnet steel and side magnet steel by
It impacts and separates；
(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 distance of the side magnet steel close to the side of voice coil to sound film ring portion inward flange is no more than sound film ring portion width
Half, meanwhile, the shortest distance of protrusion to sound film is more than or equal to side magnet steel to the shortest distance of sound film, it is ensured that when sound film
When lower vibration, either side magnet steel or protrusion will not be interfered with sound film.Therefore, compared to conventional minitype acoustic generator
Part, the mini-sound device of the utility model has biggish oscillation space, 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 sound film 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 Figure 1, this kind of mini-sound device is generally
Including frame 1, it is fixed on the vibrational system 2 of the frame 1 and is partially housed in the magnetic circuit system 3 of the frame 1, the vibration
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 magnet steel 31 and ring
The secondary magnet steel 32 being arranged around the periphery of the main magnet steel 31, the main magnet steel 31 and the secondary interval of magnet steel 32 setting are formed between magnetic
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 direction
On the contrary；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 implementation
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.Preferably, the main part 351 and the protrusion
Portion 354 at right angles connects.
In other alternative-embodiments, the magnetic circuit system 3 further includes the main pole for being stacked at 31 top of main magnet steel
Core 36, the consequent pole core 35 and the main pole core 36 are made of permeability magnetic material, play 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.
Further, as shown in fig. 6, in another preferred embodiment, the sound film 21 includes middle part 211, encloses
The fixation in the ring portion 212 is extended outwardly and surrounded around the ring portion 212 of the middle part 211 and from the ring portion 212
Portion 213, the fixed part 213 are connect with the side magnet steel 34, and the ring portion 212 includes connecting with the middle part 211
The inward flange 212a and outer edge 212b being connect with the fixed part 213, as shown in figure 3, the side magnet steel 34 is close to the sound
The distance for enclosing 22 sides to the inward flange 212a is d1, the inward flange 212a to the outer edge 212b distance is d2, preferably
, d1≥d2/2.Along direction of vibration, the protrusion 354 is close to the shortest distance of 22 side of voice coil to the sound film 21
h1, the shortest distance of the side magnet steel 34 close to 22 side of voice coil to the sound film 21 is h2, it is preferred that h1≥h2.Bian Ci
Steel 34 is no more than the position of 21 ring portion width half of sound film close to the side of voice coil 22, when sound film 21 is lower to shake, side magnet steel 34
It will not be interfered with sound film 21, meanwhile, the shortest distance of protrusion 354 to sound film 21 is more than or equal to side magnet steel 34 and arrives sound film 21
The shortest distance, it is ensured that protrusion 354 will not be interfered with sound film 21 so that mini-sound device guarantee meet want
There is biggish oscillation space while the BL value asked.
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 Figure 7-8, the consequent pole core 35 is provided around the ring of the voice coil 22
Shape 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 22
The groove 353 of side, the side magnet steel 34 are placed in the groove 353.The vibrational system 2 further includes flexible circuit board 23
With lower sound film 24, the flexible circuit board 23 is fixedly connected with the interconnecting piece 352, the lower sound film 24 and 21 phase of sound film
To being arranged and be fixed on 23 lower section of the 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 (8)
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 protrusion are bonded the side magnet steel and extend.
2. mini-sound device according to claim 1, which is characterized in that the main part and the protrusion are rectangular
Connection.
3. mini-sound device according to claim 1, which is characterized in that the sound film includes middle part, around described
The ring portion of middle part and the fixed part that the ring portion is extended outwardly and surrounded from the ring portion, the ring portion include with
The inward flange of middle part connection and the outer edge being connect with the fixed part, the side magnet steel close to the voice coil side extremely
The distance of the inward flange is more than or equal to the half of the inward flange to the outer edge distance.
4. mini-sound device according to claim 1, which is characterized in that along direction of vibration, the protrusion is close to institute
The shortest distance for stating voice coil side to the sound film is more than or equal to the side magnet steel close to the voice coil side to the sound film
The shortest distance.
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.
8. mini-sound device according to claim 3, which is characterized in that the fixed part is connect with the side magnet steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920553497.8U CN209659604U (en) | 2019-04-22 | 2019-04-22 | Mini-sound device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920553497.8U CN209659604U (en) | 2019-04-22 | 2019-04-22 | Mini-sound device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209659604U true CN209659604U (en) | 2019-11-19 |
Family
ID=68529518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920553497.8U Expired - Fee Related CN209659604U (en) | 2019-04-22 | 2019-04-22 | Mini-sound device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209659604U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117098050A (en) * | 2023-10-19 | 2023-11-21 | 瑞声光电科技(常州)有限公司 | Sound producing device and handwriting pen |
-
2019
- 2019-04-22 CN CN201920553497.8U patent/CN209659604U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117098050A (en) * | 2023-10-19 | 2023-11-21 | 瑞声光电科技(常州)有限公司 | Sound producing device and handwriting pen |
| CN117098050B (en) * | 2023-10-19 | 2024-02-20 | 瑞声光电科技(常州)有限公司 | Sound producing device and handwriting pen |
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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 |
Granted publication date: 20191119 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |