CN203279155U - Loudspeaker magnetic circuit structure - Google Patents
Loudspeaker magnetic circuit structure Download PDFInfo
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- CN203279155U CN203279155U CN 201320202287 CN201320202287U CN203279155U CN 203279155 U CN203279155 U CN 203279155U CN 201320202287 CN201320202287 CN 201320202287 CN 201320202287 U CN201320202287 U CN 201320202287U CN 203279155 U CN203279155 U CN 203279155U
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- annular magnet
- circuit structure
- magnetic circuit
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Abstract
The utility model relates to a loudspeaker magnetic circuit structure comprising a wire coil, a resonant cavity shell body, a first annular magnet arranged in the resonant cavity shell body, and a first annular magnetic conduction plate arranged on the top face of the first annular magnet, wherein a second annular magnet is fixed on the inner wall of the resonant cavity shell body in such a way that the second annular magnet and the first annular magnet are concentric and spaced apart, a magnetic gap which is arranged for wire coil movement is positioned between the first annular magnet and the second annular magnet, a second annular magnetic conduction plate is arranged on the top face of the second annular magnet, and the first annular magnet and the second annular magnet in the same axial direction are opposite in magnetic pole. Compared with a conventional loudspeaker magnetic circuit, the loudspeaker magnetic circuit of the loudspeaker magnetic circuit structure is advantageous in that the distribution of magnetic lines at the magnetic gap is characterized by balance and high magnetic flux B value. A loudspeaker adopting the magnetic circuit structure of the utility model has the beneficial characteristics of high sensitivity and small distortion rate.
Description
Technical field
The utility model relates to a kind of magnetic circuit structure for loudspeaker, is specifically related to a kind of magnetic structure of internal magnetic loudspeaker.
Background technology
Loud speaker uses in daily life generally, and the form that modal application form is into system coordinates device for image to satisfy broad masses of the people's entertainment demand.Along with science and technology and economic further developing, those only can not satisfy can speak, go out loudly as the loud speaker of target the audiovisual demand that people improve day by day.People wish when watching the high definition picture to hear simultaneously the sound of high-fidelity, but therefore, high efficiency just frivolous towards structure in the development of loud speaker and the strong direction of power ability to bear are gone development.
The magnetic structure of loud speaker is to determine speaker good vitals of fine quality, the magnetic line of force in the magnetic gap.As shown in Figure 1, the magnetic structure of conventional loudspeakers mainly is made of magnetic conduction sheet 1, neodymium magnet ring 2 and U iron cup 3, neodymium magnet ring 2 be fixed in U iron cup 3 by bolt 4 and the inwall of the outer ledge of neodymium magnet ring 2 and U iron cup 3 between leave annular magnetic gap for coil 9 motions, vibration-generating and then drive cone vibration sounding under can the effect in galvanomagnetic effect after coil 9 energisings.Adopt the conventional loudspeakers of this ordinary construction magnetic circuit, generally all having electro-acoustic conversion efficiency hangs down and the large shortcoming of distortion, the low loud speaker of this electro-acoustic conversion efficiency is difficult for carrying out collocation work with emerging efficient driving device, do not meet the life idea of low-carbon (LC), modal efficient driving device is just like digital power amplifier etc.
In addition, through lot of experiments and finding in conjunction with the electroacoustic principle: it is big or small whether the equilibrium of place, the magnetic gap magnetic line of force of loud speaker has influence on the nonlinear distortion of loud speaker; The height of the magnetic flux B of place, magnetic gap value affects the sensitivity height of loud speaker.
Therefore develop frivolous, the highly sensitive and loud speaker that distortion rate is little of a kind of structure and become the technical problem of needing solution badly.
The utility model content
The technical problems to be solved in the utility model is: propose a kind of magnetic structure with loud speaker of highly sensitive and the little characteristics of distortion rate.
the utility model is that the technical scheme that solves the problems of the technologies described above proposition is: a kind of magnetic circuit structure for loudspeaker, comprise coil, the resonant cavity housing, be arranged on the first annular magnet and the first annular magnetic conductive board that is arranged on described the first annular magnet end face in described resonant cavity housing, be fixed with the second annular magnet with described the first annular magnet concentric interval setting on described resonant cavity inner walls, be provided with the second annular magnetic conductive board on the end face of described the second annular magnet, described first, be provided with the magnetic gap for described coil movement between the second annular magnetic conductive board, same described first on axially, the second annular magnet magnetic pole is opposite.
The beneficial effects of the utility model are:
The utility model magnetic pole at slightly large the second annular magnet of the parallel sheathed size in the traditional single ring magnet outside and same two annular magnets on axially cleverly is opposite.The second annular magnet can produce to the magnetic line of force of the first annular magnet the effect of " poly-magnetic ", and in the utility model, the magnetic line of force at place, magnetic gap distributes and has more balanced and the higher characteristics of magnetic flux B value with respect to the conventional loudspeakers magnetic circuit.Adopt the loud speaker of magnetic structure in the utility model to have the beneficial features of " highly sensitive " and " distortion rate is little ".
Moreover in conjunction with mention in front " background technology " " whether the equilibrium of place, the magnetic gap magnetic line of force of loud speaker has influence on the nonlinear distortion size of loud speaker; The height of the magnetic flux B of place, magnetic gap value affects the sensitivity height of loud speaker." background knowledge also further explained the certainty that aforementioned beneficial effect occurs theoretically.
Having improved of technique scheme:
Further, be concaved with mount pad on the sidewall of described antimagnetic and described the first annular magnet opposite position, described the second annular magnet is adhesively fixed on described mount pad.
Further, described first, second annular magnet is annular neodymium magnetic patch.
Further, described first, second annular magnetic conductive board is iron washer sheet.
Further, described first, second annular magnetic conductive board all is adhesively fixed on described first, second annular magnet by bonding agent.
Description of drawings
Below in conjunction with accompanying drawing, a kind of magnetic circuit structure for loudspeaker of the present utility model is described further.
Fig. 1 is the magnetic structure schematic diagram of conventional loudspeakers.
Fig. 2 is the structural representation of the magnetic circuit structure for loudspeaker in the utility model.
Fig. 3 is the magnetic line of force distribution map that tradition is raised magnetic circuit structure for loudspeaker.
Fig. 4 is the magnetic line of force distribution map of the magnetic circuit structure for loudspeaker in the utility model.
Embodiment
Embodiment one
According to shown in Figure 2, in the present embodiment, magnetic circuit structure for loudspeaker comprises coil 9, resonant cavity housing 3, the first annular magnet 4, the first annular magnetic conductive board 5, the second annular magnetic conductive board 6 and the second annular magnet 7.
Wherein, resonant cavity housing 3 is iron and the cup-shaped that takes the shape of the letter U (what certainly easily expect is that resonant cavity housing 3 can also adopt other material to make, and can be also the hood configuration of other suitable shape).The middle part of resonant cavity housing 3U shape bottom surface has screw.
The first annular magnet 4 and the second annular magnet 7 are all that the neodymium magnetic patch by ring-type consists of.
The first annular magnetic conductive board 5 and the second annular magnetic conductive board 6 are all to be made by the washer sheet of irony, and first, second annular magnetic conductive board 5,6 center are respectively equipped with through hole.When mounted, the first annular magnetic conductive board 5 center through holes are used for passing through for construction bolt 8.The first annular magnetic conductive board 5 is bonded on the end face of the first annular magnet 4 by bonding agent, the second annular magnetic conductive board 6 also is bonded on the end face of the second annular magnet 7 by bonding agent (also can adopt other non-bonding connected mode, as engaging), the through hole of first, second annular magnetic conductive board 5,6 centers is relative with first, second annular magnet 4,7 annulus hollow bulb respectively.
The first annular magnet 4 is arranged in resonant cavity housing 3, and the U-shaped bottom surface that it is non-is bonded with the bottom side of magnetic conductive board and resonant cavity housing 3 joins.The first annular magnet 4 and the first annular magnetic conductive board 5 that is bonded on its end face are arranged in resonant cavity housing 3 by construction bolt 8 is fastening, and the head of construction bolt 8 is pressed on the first annular magnetic conductive board 5, and root and the screw of construction bolt 8 match.
It is bonding solid on annular mount pad 10 by bonding agent that the sidewall of resonant cavity housing 3 and the first annular magnet 4 opposite positions is concaved with annular mount pad 10, the second annular magnets 7.The second annular magnet 7 is enclosed within the magnetic gap that is provided with between the first annular magnet 4 outsides and relative the first annular magnet 4 concentric interval settings and first, second annular magnetic conductive board 5,6 for coil 9 motions.Same first, second annular magnet 4,7 magnetic pole on axially is opposite, and the end face magnetic pole of the first annular magnet 4 is the N utmost point, with the second annular magnet 7 end face magnetic poles of end face the same side of the first annular magnet 4 be the S utmost point.
As shown in Figure 3, the outer magnetic line of force of tradition single ring magnet is from self the N utmost point, then imports into from self the S utmost point, thereby causes the magnetic line of force skewness weighing apparatus at place, magnetic gap, magnetic flux B value is not high yet, and the loudspeaker sensitivity and the distortion rate index that adopt this structure to make are naturally also bad.As shown in Figure 4, in the present embodiment, the outer magnetic line of force of the first annular magnet 4 is from the N utmost point, then the S utmost point through the second annular magnet 7 imports into, again from the N utmost point of the second annular magnet 7, be passed at last the S utmost point of the first annular magnet 4, outer magnetic line of force distribution generation gathering, the equilibrium of second 7 pairs of annular magnets the first annular magnet 4 and the effect of strengthening, relative Fig. 3, the magnetic line of force distribution that in the present embodiment, magnetic structure magnetic gap is located is more balanced and magnetic flux B value is larger.Thereby make the loud speaker that adopts magnetic structure in the utility model have highly sensitive and the little characteristics of distortion rate.
The inventor also provides another kind of conversion: be not provided with annular mount pad 10 on the inwall of resonant cavity housing 3, but be wiped with a circle bonding agent and directly the second annular magnet 7 be bonded on resonant cavity housing 3 inwalls by this circle bonding agent by the lateral surface at the second annular magnet 7.
The above-described embodiment that is not limited to of the present utility model; all employings be equal to the technical scheme that replace to form as: the first annular magnet 4 and the second annular magnet 7 adopt other magnetic materials to make; the first annular magnetic conductive board 5 and the second annular magnetic conductive board 6 adopt other magnetic conductive material to make, and all drop in the protection range of the utility model requirement.
Claims (5)
1. magnetic circuit structure for loudspeaker, comprise coil, the resonant cavity housing, be arranged on the first annular magnet and the first annular magnetic conductive board that is arranged on described the first annular magnet end face in described resonant cavity housing, it is characterized in that: be fixed with the second annular magnet with described the first annular magnet concentric interval setting on described resonant cavity inner walls, be provided with the second annular magnetic conductive board on the end face of described the second annular magnet, described first, be provided with the magnetic gap for described coil movement between the second annular magnetic conductive board, same described first on axially, the second annular magnet magnetic pole is opposite.
2. magnetic circuit structure for loudspeaker according to claim 1, it is characterized in that: the sidewall of described resonant cavity housing and described the first annular magnet opposite position is concaved with annular mount pad, and described the second annular magnet is adhesively fixed on described mount pad.
3. magnetic circuit structure for loudspeaker according to claim 1, it is characterized in that: described first, second annular magnet is annular neodymium magnetic patch.
4. magnetic circuit structure for loudspeaker according to claim 1, it is characterized in that: described first, second annular magnetic conductive board is iron washer sheet.
5. magnetic circuit structure for loudspeaker according to claim 1, it is characterized in that: described first, second annular magnetic conductive board all is adhesively fixed on described first, second annular magnet by bonding agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320202287 CN203279155U (en) | 2013-04-18 | 2013-04-18 | Loudspeaker magnetic circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320202287 CN203279155U (en) | 2013-04-18 | 2013-04-18 | Loudspeaker magnetic circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203279155U true CN203279155U (en) | 2013-11-06 |
Family
ID=49509471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320202287 Expired - Lifetime CN203279155U (en) | 2013-04-18 | 2013-04-18 | Loudspeaker magnetic circuit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203279155U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104640035A (en) * | 2013-11-07 | 2015-05-20 | 哈曼国际工业有限公司 | Dual coil moving magnet transducer |
| CN107517430A (en) * | 2016-06-17 | 2017-12-26 | 声电电子科技(惠州)有限公司 | A kind of double washer Microspeakers |
-
2013
- 2013-04-18 CN CN 201320202287 patent/CN203279155U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104640035A (en) * | 2013-11-07 | 2015-05-20 | 哈曼国际工业有限公司 | Dual coil moving magnet transducer |
| CN104640035B (en) * | 2013-11-07 | 2019-05-14 | 哈曼国际工业有限公司 | Twin coil moves magnetic transducer and method |
| CN107517430A (en) * | 2016-06-17 | 2017-12-26 | 声电电子科技(惠州)有限公司 | A kind of double washer Microspeakers |
| CN107517430B (en) * | 2016-06-17 | 2020-01-21 | 声电电子科技(惠州)有限公司 | Double-washer micro loudspeaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131106 |
|
| CX01 | Expiry of patent term |