CN2178974Y - New magnetic circuit structure moving coil type loudspeaker - Google Patents
New magnetic circuit structure moving coil type loudspeaker Download PDFInfo
- Publication number
- CN2178974Y CN2178974Y CN 92242321 CN92242321U CN2178974Y CN 2178974 Y CN2178974 Y CN 2178974Y CN 92242321 CN92242321 CN 92242321 CN 92242321 U CN92242321 U CN 92242321U CN 2178974 Y CN2178974 Y CN 2178974Y
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- CN
- China
- Prior art keywords
- magnetic
- magnetic circuit
- magnet
- loudspeaker
- circuit structure
- 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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- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The utility model discloses a moving coil type loudspeaker with a novel magnetic circuit structure, relating to the magnetic circuit structure design of the loudspeaker manufacture. Under the condition that the external shape of a loudspeaker is substantially not changed, a T-shaped or a U-shaped iron which is used for magnetism conduction is eliminated. The technical characteristic is that a loading magnet is in a shape of a cake, a special magnetizing mode is used to make the center of one face of the loading magnet and one circle of the external circle of the loading magnet have respectively two poles, the magnetic circuit of the loading magnet is in an inner magnetism mode, the volume of the loading magnet is not limited, and therefore, a method of adding the effective magnetic field by adding the volume of the loading magnet can be adopted so as to enhance maximally the electroacoustic conversion efficiency of the loudspeaker.
Description
The present invention is the invention of the utility model of magnetic Circuit Design in the coil-moving speaker manufacturing.Modern electro-acoustic conversion device adopts moving-coil type mostly.Thereby its basic principle is coil magnetic field force induced effect drive vibrating membrane in magnetic field of energising to be made audio frequency vibration and sounds.Advantages such as it is little that it has the distortion factor, and frequency response is good.But at electro-acoustic conversion efficiency, (being the sensitivity of loud speaker) improves and magnetic field is set, exist the contradiction in the design always, that is: certain in the damping of the vibrating diaphragm of sounding, under the certain situation of coil turn, effective magnetic field intensity is stronger, and the suffered magnetic field force of the electric current of the coil that then flows is healed big, makes system sensitivity higher.And the intensity of effective magnetic field is subjected to the restriction of magnetic material and magnetic Circuit Design.Present coil-moving speaker has two kinds of magnetic Circuit Design: " external magnetic type " and " internal magnetization ".External magnetic circuit design sees among figure " 1 " figure that 1 is the tubular magnet; The 2nd, " washer " shape magnetic conduction iron covering plate; The 3rd, "T"-shaped magnetic conduction iron.The magnetic line of force must be by 6 slits of said system composition; 4 slits and 5 slits.The long magnetic resistance of magnetic circuit is big and quite a few magnetic flux is arranged, and forms effective magnetic field at 6 places without the magnetic circuit of setting, walked other by way of, and become leakage field.From energy point of view, this is a kind of waste.And leakage field can influence other electronic system work in a lot of occasions, is harmful to.Internal magnetization magnetic circuit design is exactly in order to reduce the influence of leakage field to other system to greatest extent, and its design sees among figure (2) figure/the 1st, cylindrical magnet; The/2nd, " U " shape magnetic conduction iron, (or claiming a jar shape magnetic conduction iron); The/3rd, the magnetic conduction cover plate.These form again/6 slits; / 4 slits and/5 slits.Comparing advantage with the external magnetic type system has: do not have leakage field, energy dissipation few; Magnetic flux can concentrate on/place, 6 slits formation effective magnetic field preferably.But because the sectional area of cylindrical magnet can not be limit its volume in the dust like this greater than the area of voice coil loudspeaker voice coil, improve its effective magnetic field intensity thereby limited, magnetic circuit is also longer in addition.For making internal magnetic loudspeaker that enough sensitivity be arranged, must adopt the magnet that carries of high energy product, so just make its cost improve a lot (existing internal magnetic loudspeaker price 3-4 is doubly to external magnetic type bore outer-magnet speakers).
The purpose of this utility model is that a kind of new coil-moving speaker magnet shape and magnetic Circuit Design will be provided, and it has the advantage of internal magnetization and external magnetic type design concurrently and does not have its shortcoming.
The purpose of this utility model is achieved in that and makes whole year magnet be " cake " shape.Use the special mode of magnetizing one of to make that center and outer ring are respectively two magnetic poles on the face.See figure (3).21 is to carry magnet among the figure; The 22nd, washer shape magnetic conduction iron covering plate; The 23rd, the magnetic cover plate of adjusting, these form 26 slits, 24 slits and 25 slits again.Its feature is that two magnetic poles of magnet are placed on the face, thereby has saved " T " iron or " U " shape iron (i.e. jar iron) of magnetic conduction.System compares with external magnetic type, does not have leakage field and magnetic circuit short, and magnetic resistance is corresponding little, and magnetic flux can concentrate on place, A slit preferably and form effective magnetic field.Compare with traditional internal magnetization magnetic circuit; The volume that carries magnet is not subjected to the long-pending restriction of coil section, can adopt low-grade year bigger magnet of volume.
Because the magnetic Circuit Design that this invention proposes is the low-grade magnet that " internal magnetization " adopts the external magnetic type designing institute to use again, do not have "T"-shaped or " U " shape magnetic conduction iron, owing to there is not the restriction of volume, obtain higher electro-acoustic conversion efficiency (sensitivity) and carry magnet volume as long as increase, therefore, can use more low-grade year magnet.
Claims (2)
1, a kind of loud speaker of new magnetic structure.This magnetic circuit structure for loudspeaker does not contain "T"-shaped iron or " U " shape iron that magnetic conduction is used, and it is characterized in that carrying the cylindrical pie of magnet, uses the special mode of magnetizing to make and carries on face of magnet, and center and outer garden one circle are respectively two magnetic poles.
2,, only it is characterized in that whole magnetic circuit magnetic leakage free is " internal magnetization " magnetic structure with washer shape and the circular iron covering plate Distribution of Magnetic Field of adjusting according to the loud speaker of the described a kind of new magnetic structure of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92242321 CN2178974Y (en) | 1992-11-25 | 1992-11-25 | New magnetic circuit structure moving coil type loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92242321 CN2178974Y (en) | 1992-11-25 | 1992-11-25 | New magnetic circuit structure moving coil type loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2178974Y true CN2178974Y (en) | 1994-10-05 |
Family
ID=33782152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92242321 Expired - Fee Related CN2178974Y (en) | 1992-11-25 | 1992-11-25 | New magnetic circuit structure moving coil type loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2178974Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998047312A1 (en) * | 1997-04-14 | 1998-10-22 | Fan Zhang | Loudspeaker and method of manufacturing the same |
| CN106375918A (en) * | 2016-10-31 | 2017-02-01 | 维沃移动通信有限公司 | Magnetic circuit system, loudspeaker and mobile terminal |
-
1992
- 1992-11-25 CN CN 92242321 patent/CN2178974Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998047312A1 (en) * | 1997-04-14 | 1998-10-22 | Fan Zhang | Loudspeaker and method of manufacturing the same |
| CN106375918A (en) * | 2016-10-31 | 2017-02-01 | 维沃移动通信有限公司 | Magnetic circuit system, loudspeaker and mobile terminal |
| CN106375918B (en) * | 2016-10-31 | 2019-05-17 | 维沃移动通信有限公司 | A kind of magnetic circuit system, loudspeaker and mobile terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |