CN2935687Y - Sandwich magnetic structure loudspeaker - Google Patents
Sandwich magnetic structure loudspeaker Download PDFInfo
- Publication number
- CN2935687Y CN2935687Y CN 200620016920 CN200620016920U CN2935687Y CN 2935687 Y CN2935687 Y CN 2935687Y CN 200620016920 CN200620016920 CN 200620016920 CN 200620016920 U CN200620016920 U CN 200620016920U CN 2935687 Y CN2935687 Y CN 2935687Y
- Authority
- CN
- China
- Prior art keywords
- magnet
- magnetic
- pole plate
- loud speaker
- voice coil
- 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 - Lifetime
Links
- 239000004020 conductor Substances 0.000 claims description 22
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 230000037250 Clearance Effects 0.000 abstract 1
- 230000035512 clearance Effects 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 3
- 210000002356 Skeleton Anatomy 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910000828 alnico Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910000529 magnetic ferrite Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Abstract
The utility model discloses a speaker with a core magnetic circuit structure; the invention includes an audio diaphragm, a folding ring, an audio ring, an audio loop, a magnetic conductive bowl, a first magnet, a second magnet, a pole plate and a basin frame. Wherein, the audio diaphragm is adhered onto the frame of the audio loop; the inner edge of the folding ring is also adhered onto the frame of the audio loop; the outer edge of the folding ring is adhered onto the basin frame. The basin frame is fixedly provided above the magnetic conductive bowl; the magnetic conductive bowl is an open bowl body with the flat bottom; the first magnet is fixedly provided at the bottom of the magnetic conductive bowl. The second magnet and the first magnet are respectively provided at the upper and lower sides of the pole plate and with opposite polarity. The audio loop is inserted into the magnetic clearance formed by the magnetic conductive bowl and the pole plate. The speaker with a core magnetic circuit structure of the utility model has the advantages of that the sensitivity is high; the distortion is low; the voice quality is good, etc.
Description
[technical field]
The utility model relates to a kind of loud speaker, particularly a kind of sandwich magnetic structure loud speaker.
[background technology]
The cardinal principle of loud speaker is that hot-wire coil moves in magnetic field, thereby drives the sound film motion that is bonded on the voice coil loudspeaker voice coil, sounds.Loud speaker is if will truly reduce sound source signal, and one of them necessary condition is exactly keep magnetic force BL constant, and BL is the product of magnetic gap intrinsic inductance and effective voice coil loudspeaker voice coil line length, and method commonly used is to use long voice coil and minor circle to keep BL constant.Yet when using long voice coil in traditional internal magnetic loudspeaker, magnetic field is often also asymmetric up and down for magnetic gap, so loud speaker is easy to generate distortion under the low frequency large amplitude, thereby influences tonequality.In addition, traditional internal magnetic loudspeaker adopts alnico magnet or ferrite magnetic steel as magnet more, so sensitivity is lower.If adopt the preferable ndfeb magnet of magnetic in traditional internal magnetic loudspeaker as magnet, because the common volume of ndfeb magnet is less, be arranged under the pole plate of loud speaker, therefore the magnetic flux density under the pole plate often will be higher than magnetic flux density on the pole plate, must cause the interior magnetic intensity of magnetic gap along voice coil loudspeaker voice coil height skewness, non-linear big, loud speaker distortion under the low frequency large amplitude is even more serious, thereby can't obtain desirable tonequality.
[utility model content]
Advantages such as technical problem to be solved in the utility model is the deficiency at above-mentioned traditional internal magnetic loudspeaker, and a kind of sandwich magnetic structure loud speaker is provided, and it has the element sensitivity height, and distorted characteristic is little, and tonequality is good.
For solving the problems of the technologies described above, the technical scheme that the utility model adopted is: a kind of sandwich magnetic structure loud speaker is provided, and it comprises sound film, ring, voice coil loudspeaker voice coil, magnetic conductor bowl, first magnet, second magnet, pole plate and basin frame.Wherein, described sound film is adhered on the speech coil framework, and described ring inner edge also is adhered on the speech coil framework, and the ring outer rim then is adhered on the basin frame.Described basin frame is fixedly installed in the magnetic conductor bowl top, and described magnetic conductor bowl is a uncovered flat bowl body, and described first magnet is fixedly arranged on the magnetic conductor bowl bottom.Described second magnet and first magnet are fixedly arranged on pole plate both sides up and down respectively, and polarity is opposite.Described voice coil loudspeaker voice coil inserts and is assemblied in the magnetic gap that forms between magnetic conductor bowl and pole plate.
More specifically, described pole plate, first magnet and second magnet are circle, and the coaxial setting of three.
More specifically, described first magnet and second magnet are ndfeb magnet.
More specifically, described first magnet and the second magnet equal diameters.
More specifically, the magnetic circuit height is 1: 1 about the described pole plate.
Compared with prior art, the utlity model has following beneficial effect:
1. improve the magnetic gap symmetry in magnetic field up and down, helped reducing the distortion of unit, improved tonequality.
2. improved the magnetic field intensity in the magnetic gap, the sensitivity that helps improving the unit.
The concrete structure of the sandwich magnetic structure loud speaker of the utility model will be provided in detail by the following drawings and embodiment.
[description of drawings]
Fig. 1 is the three-dimensional cutaway view of sandwich magnetic structure loud speaker first embodiment of the utility model.
Fig. 2 is the profile of sandwich magnetic structure loud speaker first embodiment of the utility model.
Fig. 3 is the magnetic gap intrinsic inductance comparison diagram of the sandwich magnetic structure loud speaker of the utility model and traditional internal magnetic loudspeaker.
Fig. 4 is the profile of sandwich magnetic structure loud speaker second embodiment of the utility model.
[embodiment]
Please consult Fig. 1 and Fig. 2 simultaneously, sandwich magnetic structure loud speaker first embodiment of the utility model comprises sound film 1, ring 2, voice coil loudspeaker voice coil 3, magnetic conductor bowl 4, circular first magnet 5, circular second magnet 6, circular pole plate 7 and basin frame 8.Wherein, sound film 1 is an arcs of recesses, and its outer rim is adhered on voice coil loudspeaker voice coil 3 skeletons, and ring 2 inner edges also are adhered on voice coil loudspeaker voice coil 3 skeletons, and ring 2 outer rims then are adhered on the basin frame 8, thereby makes sound film 1 and voice coil loudspeaker voice coil 3 installing and locating on basin frame 8.Basin frame 8 is fixedly installed in magnetic conductor bowl 4 tops, and described magnetic conductor bowl 4 is uncovered flat bowl bodies, and first magnet 5, second magnet 6 and pole plate 7 all are contained in the magnetic conductor bowl 4.First magnet, 5 lower surface bonds are in magnetic conductor bowl 4 bottoms, and second magnet 6 is fixed in first magnet, 5 upper surfaces in regular turn with pole plate 7.Second magnet 6 and first magnet 5 are divided into pole plate 7 upper and lower both sides, and coaxial with pole plate 7.First magnet 5 and second magnet, 6 equal diameters, polarity is opposite, and all can select the ndfeb magnet of excellent magnetic for use.Form magnetic gap 9 between pole plate 7 and the magnetic conductor bowl 4, pole plate about in the of 7 the magnetic field height be 1: 1.When basin frame 8 was installed on the magnetic conductor bowl 4, described voice coil loudspeaker voice coil 3 promptly inserted in the magnetic gap 9 that is assemblied in pole plate 7 and 4 formation of magnetic conductor bowl.
In the actual installation process, should be earlier that first magnet 5 is bonding with pole plate 7, and use positioning tool to make magnet 5 coaxial with pole plate 7.After the bonded adhesives for the treatment of 7 on first magnet 5 and pole plate solidifies, again that this first magnet 5 is bonding with magnetic conductor bowl 4 with pole plate 7 combinations, and use magnetic rule to guarantee that magnetic gap 9 is even.After treating the bonded adhesives curing of 4 of first magnet 5 and magnetic conductor bowls, again this part magnetic circuit is magnetized.Because first magnet 5 is opposite with second magnet, 6 polarity, therefore need second magnet 6 is magnetized separately earlier, again with its oppositely and pole plate 7 bonding, also need frock to assist in this operation, so that second magnet 6 is coaxial with pole plate 7, fix second magnet 6 simultaneously, it is unlikely to because polarity is ostracised mutually on the contrary.At last, the basin frame 8 that will install sound film 1 and voice coil loudspeaker voice coil 3 again is fixed in magnetic conductor bowl 4 tops, is assemblied in magnetic conductor bowl 4 and 7 formed magnetic gaps 9 of pole plate so that voice coil loudspeaker voice coil 3 inserts, and can finish assembling.
Because first magnet 5 of the present utility model and second magnet, 6 equal diameters, and symmetry is installed on pole plate 7 both sides, and pole plate about in the of 7 the magnetic circuit height be 1: 1, therefore can guarantee along the Distribution of Magnetic Field of voice coil loudspeaker voice coil 3 short transverses even, the unit distortion is few, thereby can obtain preferable acoustical quality.In addition,, therefore can improve the magnetic field intensity in the magnetic gap 9 because first magnet 5 and second magnet 6 all adopt ndfeb magnet to make, thus the sensitivity that improves the unit.As shown in Figure 3, be the magnetic gap intrinsic inductance comparison diagram of the sandwich magnetic structure loud speaker of the utility model and traditional internal magnetic loudspeaker.Wherein, solid line is the magnetic gap intrinsic inductance curve of the sandwich magnetic structure loud speaker of the utility model, and dotted line is the magnetic flux density curve in traditional internal magnetic loudspeaker magnetic gap, and abscissa 0 position is corresponding to pole plate vertical direction center.As seen from the figure, the magnetic gap intrinsic inductance of the sandwich magnetic structure loud speaker of the utility model will be higher than the magnetic gap intrinsic inductance of traditional internal magnetic loudspeaker.
See also Fig. 4 again, the sandwich magnetic structure loud speaker of the utility model also can be applicable in the unit, ball top, to improve the distorted characteristic and the sensitivity of unit, traditional ball top.In this embodiment, sound film 1 ' is a dome-type, and other structures are all identical with first embodiment, so do not give unnecessary details.
Claims (5)
1, a kind of sandwich magnetic structure loud speaker, comprise the sound film, ring, voice coil loudspeaker voice coil, magnetic conductor bowl, pole plate and basin frame, wherein said sound film is adhered on the speech coil framework, described ring inner edge also is adhered on the speech coil framework, the ring outer rim then is adhered on the basin frame, described basin frame is fixedly installed in the magnetic conductor bowl top, described magnetic conductor bowl is a uncovered flat bowl body, it is characterized in that: described loud speaker also comprises first magnet and second magnet, described second magnet and first magnet are fixedly arranged on pole plate both sides up and down respectively, and polarity is opposite, and described first magnet is fixedly arranged on the magnetic conductor bowl bottom, and described voice coil loudspeaker voice coil inserts and is assemblied in the magnetic gap that forms between magnetic conductor bowl and pole plate.
2, sandwich magnetic structure loud speaker as claimed in claim 1, it is characterized in that: described pole plate, first magnet and second magnet are circle, and the coaxial setting of three.
3, sandwich magnetic structure loud speaker as claimed in claim 1 is characterized in that: described first magnet and the second magnet equal diameters.
4, sandwich magnetic structure loud speaker as claimed in claim 1, it is characterized in that: described first magnet and second magnet are ndfeb magnet.
5, sandwich magnetic structure loud speaker as claimed in claim 1 is characterized in that: described pole plate magnetic circuit height up and down is 1: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620016920 CN2935687Y (en) | 2006-07-07 | 2006-07-07 | Sandwich magnetic structure loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620016920 CN2935687Y (en) | 2006-07-07 | 2006-07-07 | Sandwich magnetic structure loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2935687Y true CN2935687Y (en) | 2007-08-15 |
Family
ID=38352368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620016920 Expired - Lifetime CN2935687Y (en) | 2006-07-07 | 2006-07-07 | Sandwich magnetic structure loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2935687Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106851505A (en) * | 2017-03-31 | 2017-06-13 | 方炳钧 | Vibrating diaphragm type zero frequency high tone quality loudspeaker |
| WO2020227956A1 (en) * | 2019-05-10 | 2020-11-19 | 瑞声声学科技(深圳)有限公司 | Magnetic circuit system and a loudspeaker using same |
-
2006
- 2006-07-07 CN CN 200620016920 patent/CN2935687Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106851505A (en) * | 2017-03-31 | 2017-06-13 | 方炳钧 | Vibrating diaphragm type zero frequency high tone quality loudspeaker |
| WO2020227956A1 (en) * | 2019-05-10 | 2020-11-19 | 瑞声声学科技(深圳)有限公司 | Magnetic circuit system and a loudspeaker using same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1121809C (en) | Loudspeaker | |
| EP1545151A3 (en) | Speaker device with improved magnetic ciruit | |
| CN204069332U (en) | Magnetic circuit system and apply the electro-acoustic element of this magnetic circuit system | |
| CN2935687Y (en) | Sandwich magnetic structure loudspeaker | |
| CN2935688Y (en) | Parallel magnetic structure loudspeaker | |
| CN201629837U (en) | Coaxial loudspeaker | |
| CN2676553Y (en) | Sound membrane with hole | |
| CN101931849A (en) | Thin speaker with taper location support chip | |
| CN201839431U (en) | Thin type speaker with tapered positioning support chip | |
| CN201699973U (en) | Loudspeaker | |
| CN206517597U (en) | Coaxial loudspeaker | |
| CN202111853U (en) | Ultrathin flat plane speaker | |
| CN205610908U (en) | Novel speaker magnetic structure and speaker that possess two kinds of magnetic circuit characteristics | |
| CN201758446U (en) | Thin loudspeaker based on multi-step magnetic conductive yoke | |
| CN201750539U (en) | Magnetic circuit of thin type speaker | |
| CN101931847B (en) | Thin type speaker based on multi-step magnetic yoke | |
| CN205051868U (en) | Magnetic circuit of horn loudspeaker | |
| CN202121770U (en) | Power amplifier output driving and induced voltage driving compound type full frequency loudspeaker | |
| CN2387687Y (en) | Ball top high pitch horn coaxial all-band loudspeaker | |
| CN2609309Y (en) | All-band coaxial loudspeaker | |
| CN2798477Y (en) | Concurrent coaxical loudspeaker | |
| CN102300143A (en) | Thin type speaker | |
| CN2739902Y (en) | Coaxial loudspeaker | |
| CN2483924Y (en) | Whole-tone coaxial cophased loudspeaker | |
| CN201708905U (en) | Novel linear medium-high frequency compression driver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070815 |
|
| EXPY | Termination of patent right or utility model |