CN204669563U - Magnetic screen loud speaker - Google Patents
Magnetic screen loud speaker Download PDFInfo
- Publication number
- CN204669563U CN204669563U CN201520409309.6U CN201520409309U CN204669563U CN 204669563 U CN204669563 U CN 204669563U CN 201520409309 U CN201520409309 U CN 201520409309U CN 204669563 U CN204669563 U CN 204669563U
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- CN
- China
- Prior art keywords
- magnetic
- voice unit
- magnetic screen
- loud speaker
- ferromagnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a kind of magnetic screen loud speaker, comprises alto units, voice unit, and alto units connects magnetization, demagnetization head, and it is characterized in that, voice unit is positioned at magnetic screen frock.When filling demagnetization, the magnetic line of force forms magnetic loop in magnetic screen frock, thus serves magnetic screening action to voice unit, when defective products is reprocessed, only moves back alto units and magnetizes.
Description
Technical field
The utility model relates to a kind of magnetic screen loud speaker, belongs to loudspeaker techniques field.
Background technology
Magnetic is named again magnetization, exactly sensing equidirectional is forced in the direction of magnetic domain mixed and disorderly in the object of ferrimagnet.The object be magnetized is put in strong external magnetic field and goes.Make it the magnetic flux density that reaches capacity, then remove external magnetic field, also have remanent magnetism in magnet, this process magnetizes exactly or magnetizes.
Demagnetization is exactly that the object presenting magnetized state is eliminated remanent magnetism, workpiece is placed in alternating magnetic field, produces magnetic hysteresis loop, when the amplitude of alternating magnetic field is successively decreased gradually, the track of magnetic hysteresis loop is also more and more less, and when magnetic field intensity reduces to zero, the remanent magnetism Br in workpiece is close to zero.During demagnetization, the change of the direction in electric current and magnetic field and size must " commutating decays carries out simultaneously ".
Middle and high sound unit consubstantiality parallel arranged is had in the structure of loud speaker, when defective products is reprocessed, because voice unit is through verified pieces O.K., badly be present in alto units, so just there is no need to remove voice unit, and voice unit is in the solid and welding with middle pitch joint portion glue, certainly will cause damage if remove.If do not removed, the magnetic circuit of middle and high sound is the magnet steel of unlike material, and magnetic saturation intensity is different, cannot magnetization, demagnetization simultaneously.Complete and reprocess and must take measures.
Utility model content
The purpose of this utility model is to provide a kind of magnetic screen loud speaker, by installing magnetic screen frock additional at voice unit, like this when defective products is reprocessed, due to magnetic screening action, demagnetizes to voice unit with regard to not needing.
For achieving the above object, the utility model is realized by following technical proposals.A kind of magnetic screen loud speaker, comprises alto units, voice unit, and alto units connects magnetization, demagnetization head, and it is characterized in that, voice unit is positioned at magnetic screen frock.
Described magnetic screen frock is by ferromagnet upper module and ferromagnet lower module, and ferromagnet lower module offers the groove holding voice unit, and ferromagnet upper module covers on groove.
The utility model utilizes magnetic screen principle to shield voice unit.Because ferromagnetic substance is according to the difference of material, its permeability is 10 in air
3-10
5doubly, so when filling demagnetization, the path that the magnetic line of force is walked is the ferromagnetic material of magnetic resistance little (permeability is high), ferromagnetic material is added around voice unit, the magnetic line of force will form magnetic loop along ferromagnetic material, serves magnetic screening action to voice unit, only to alto units move back magnetize just passable.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model;
Fig. 2 and Fig. 3 is magnetic screen principle schematic.
1. alto units 2. voice unit 3. magnetization, demagnetization, 4. magnetic screen frock 41. ferromagnet upper module 42. ferromagnet lower module 5. magnetic line of force in figure.
Embodiment
As shown in Figure 1, this magnetic screen loud speaker, comprises alto units 1, voice unit 2, and alto units 1 connects magnetization, demagnetization 3, and voice unit 2 is positioned at magnetic screen frock 4.Described magnetic screen frock 4 is by ferromagnet upper module 41 and ferromagnet lower module 42, ferromagnet lower module 42 offers the groove holding voice unit, ferromagnet upper module 42 covers on groove, thus makes voice unit 2 be surrounded by ferromagnetic substance and produce magnetic screening effect.
As shown in Figures 2 and 3, when filling demagnetization, the path that the magnetic line of force 5 is walked is the ferromagnetic material of magnetic resistance little (permeability is high), magnetic screen frock 4 is added around voice unit, the magnetic line of force 5 will form magnetic loop along magnetic screen frock 4, magnetic screening action is served to voice unit 2, so do not need to move back voice unit again to magnetize.
Claims (2)
1. a magnetic screen loud speaker, comprises alto units, voice unit, and alto units connects magnetization, demagnetization head, and it is characterized in that, voice unit is positioned at magnetic screen frock.
2. magnetic screen loud speaker according to claim 1, is characterized in that, described magnetic screen frock is by ferromagnet upper module and ferromagnet lower module, and ferromagnet lower module offers the groove holding voice unit, and ferromagnet upper module covers on groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520409309.6U CN204669563U (en) | 2015-06-15 | 2015-06-15 | Magnetic screen loud speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520409309.6U CN204669563U (en) | 2015-06-15 | 2015-06-15 | Magnetic screen loud speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204669563U true CN204669563U (en) | 2015-09-23 |
Family
ID=54139900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520409309.6U Expired - Fee Related CN204669563U (en) | 2015-06-15 | 2015-06-15 | Magnetic screen loud speaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204669563U (en) |
-
2015
- 2015-06-15 CN CN201520409309.6U patent/CN204669563U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20150923 Termination date: 20170615 |