CN211909151U - Magnetic structure of loudspeaker - Google Patents
Magnetic structure of loudspeaker Download PDFInfo
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- CN211909151U CN211909151U CN202020237128.0U CN202020237128U CN211909151U CN 211909151 U CN211909151 U CN 211909151U CN 202020237128 U CN202020237128 U CN 202020237128U CN 211909151 U CN211909151 U CN 211909151U
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Abstract
The utility model relates to a magnetic structure of speaker, it includes two coil groups, two coil group's magnetic field opposite direction. The utility model discloses a two coil assembly replace by magnet and wire coil in the current speaker to reduce the magnetic structure's of speaker mention, and then reduce the whole volume of speaker. Furthermore, the utility model discloses add magnetic conductive material at one of them coil assembly, this magnetic conductive material is equivalent to the magnetic conduction post, and it can the effectual produced magnetic field of collection coil assembly, makes to collect the magnetic field after concentrating and can possess stronger magnetic force for the coil realizes maximize magnetic field intensity in narrow and small space range, thereby improves the performance of speaker.
Description
Technical Field
The utility model relates to a speaker field, concretely relates to magnetic structure of speaker.
Background
A loudspeaker is an important acoustic component in electronic equipment, and is a transducer device that converts an electrical signal into an acoustic signal.
The existing loudspeaker structure generally comprises a magnet, a wire coil and a vibrating diaphragm connected with the wire coil, wherein the coil is electrified to generate a magnetic field, so that the stress of the coil in the magnetic field of the magnet is changed, when the electrified current of the coil is changed, the force applied to the coil is also changed, the coil vibrates, and meanwhile, the vibrating diaphragm connected with the coil vibrates along with the force, so that sound is produced, and the conversion from an electric signal to an acoustic signal is completed.
In the current speaker structure, the magnet and the conductive coil form a magnetic structure, and the magnetic structure occupies a large space, so that the speaker structure has a large volume, and the usage of the speaker structure in the handheld electronic device and the ultra-thin electronic device is limited to a certain extent. Therefore, how to provide a miniaturized speaker structure to meet the requirement of ultra-thinning or miniaturization of the applied electronic device becomes a problem to be solved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a magnetic structure of speaker, this magnetic structure is small, can realize the miniaturization of speaker.
In order to achieve the above object, the utility model adopts the following technical scheme:
a magnetic structure of a loudspeaker comprises two coil groups manufactured by adopting a semiconductor technology, a micro-electro-mechanical technology or a circuit board technology, wherein the two coil groups are a first coil group and a second coil group, and the directions of magnetic fields of the first coil group and the second coil group are opposite.
At least one coil group is provided with a magnetic substance.
The diameters of the two coil groups are the same, and a distance exists between the lower end face of the first coil group and the upper end face of the second coil group.
The diameters of the two coil groups are different, the second coil group is provided with a magnetic substance, and the upper end of the magnetic substance extends into the first coil group.
The coil block portion having a small coil diameter is contained in the coil block having a large coil diameter.
The coil group is composed of at least one coil layer, and when the coil group is composed of more than two coil layers, the coil current directions of the more than two coil layers are the same or opposite;
when the coil current directions of more than two coil layers are opposite, the number of the coil layers in the two current directions is not equal.
The coil layer comprises at least one coil, and when the coil layer comprises more than two coils, the more than two coils are connected in series and/or in parallel.
An insulating layer is arranged between two adjacent coil layers of the coil assembly.
The insulating layer is provided with a abdicating hole; the magnetic conductive substance is arranged in the abdicating hole.
The coil layers of the coil group are connected in series or in parallel.
When the coil groups are connected in series, the winding directions of two adjacent coils are opposite.
The coil layer is provided with a first connecting end and a second connecting end;
the first connecting end of the first layer of coil layer of the coil group is connected with an external power supply, and the first connecting end or the second connecting end of the last layer of coil layer is connected with the external power supply; the first connecting ends of the other odd coil layers are connected with the first connecting end of the previous coil layer, and the second connecting ends are connected with the second connecting end of the next coil layer; the second connecting end of the even number of coil layers is connected with the second connecting end of the upper coil layer, and the first connecting end is connected with the first connecting end of the lower coil layer;
or the second connecting end of the first layer coil layer of the coil group is used as one connecting end of the coil group to be connected with an external power supply, and the first connecting end or the second connecting end of the last layer coil layer is used as the other connecting end of the coil group to be connected with the external power supply; the second connecting end of the odd coil layer in the other coil layers is connected with the second connecting end of the previous coil layer, and the first connecting end is connected with the first connecting end of the next coil layer; the first connecting end of the even number coil layer is connected with the first connecting end of the upper coil layer, and the second connecting end of the even number coil layer is connected with the second connecting end of the lower coil layer.
When the coil groups are connected in parallel, the winding directions of the coils of all the coil layers are the same; the first connecting ends of all the coil layers are connected with the positive pole or the negative pole of an external power supply together, and the second connecting ends of all the coil layers are connected with the negative pole or the positive pole of the external power supply together.
After adopting above-mentioned scheme, replace magnet and wire coil in the current speaker through two coil groups to reduce the volume of the magnetic structure of speaker, and then reduce the whole volume of speaker, realize the miniaturization of speaker. Furthermore, the utility model discloses set up the magnetic conductivity material on an at least coil assembly, this magnetic conductivity material is equivalent to the magnetic conduction post, and it can effectually compile the produced magnetic field of coil assembly, makes to compile the magnetic field after concentrating can possess stronger magnetic force for the coil realizes maximize magnetic field intensity in narrow and small space range, thereby improves the performance of loudspeaker on the basis of speaker volume miniaturization.
Furthermore, the utility model discloses a coil assembly adopts the semiconductor technology etching to form for coil assembly can constitute by a plurality of coil layers in minimum space, makes the number of turns of coil assembly improve greatly from this, has further realized the intensity in the limited maximize magnetic field in narrow and small space, has further improved the performance of magnetic diaphragm, makes planar speaker more feasible.
Drawings
Fig. 1 is a schematic structural view of a speaker including the magnetic structure of the present invention;
fig. 2 is a schematic structural diagram of a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a third embodiment of the present invention;
fig. 5 is a schematic view of a combined structure of the coil assembly of the present invention;
fig. 6 is an exploded schematic view of the coil assembly of the present invention;
fig. 7 is a schematic structural diagram of the coil assembly of the present invention when the coil layers are connected in parallel;
fig. 8 is a schematic structural diagram of the first embodiment of the present invention when the coil layers of the coil assembly are connected in series;
fig. 9 is a schematic structural diagram of a second embodiment of the coil assembly according to the present invention when the coil layers are connected in series;
fig. 10 shows a first embodiment of a coil layer according to the present invention;
fig. 11 is a second embodiment of the coil layer of the present invention;
fig. 12 shows a third embodiment of the coil layer according to the present invention;
fig. 13 shows a fourth embodiment of the coil layer according to the present invention.
Detailed Description
The utility model discloses a magnetic structure of speaker, it includes two coil groups 10, and the magnetic field opposite direction of two coil groups 10 is equipped with magnetic conductivity material 20 on at least one coil group 10.
The utility model discloses a magnet and wire coil in the current speaker are replaced to two coil assembly 10 to reduce the volume of the magnetic structure of speaker, and then reduce the whole volume of speaker. And simultaneously, the utility model discloses set up magnetic conductivity material 20 at an at least coil assembly 10, this magnetic conductivity material 20 matter is equivalent to the magnetic conduction post, and it can the effectual produced magnetic field of collection coil assembly 10, makes the magnetic field after concentrating to have stronger magnetic force for the coil assembly realizes maximize magnetic field intensity in narrow and small space range, thereby improves the performance of loudspeaker on the basis of speaker volume miniaturization.
As shown in fig. 1, the speaker structure includes a housing 30 and a diaphragm 40 connected to the housing 30, and the magnetic structure of the present invention is located in the housing 30, and one of the coil sets 10 is connected to the diaphragm 40, and the other coil set 10 is connected to the housing 30. The diaphragm is a part for vibrating to make the speaker sound, and may be a part of the housing.
Among the coil assemblies, the coil assembly 10 connected to the diaphragm 40 is the first coil assembly 11, and the coil assembly 10 connected to the housing 30 is the second coil assembly 12.
The coil diameter of the first coil group 11 may be the same as or different from the coil diameter of the second coil group 12. As shown in fig. 2, the first coil group 11 and the second coil group 12 have the same coil diameter. In order to improve the magnetic field strength of the magnetic structure and improve the quality of the loudspeaker, the first coil group 11 and the second coil group 12 are both provided with the magnetic substance 20, the magnetic substance 20 in the middle of the first coil group 11 is arranged on the diaphragm 40, and the magnetic substance 30 of the second coil group 12 is arranged on the shell 30. After the two coil sets 10 are powered on, the diaphragm 40 will vibrate under the action of the magnetic fields of the two coil sets 10, and the first coil set 11 will also vibrate accordingly. When the vibration amplitude of the diaphragm 40 is large, the first coil assembly 11 and the second coil assembly 12 collide with each other, which may seriously affect the performance of the speaker in a long term. To avoid this, there is a certain distance between the first coil group 11 and the second coil group 12, that is, there is a distance between the lower end surface of the first coil group 11 and the upper end surface of the second coil group 12.
When the coil diameters of the first coil group 11 and the second coil group 12 are different, the coil diameter of the first coil group 11 may be set to be larger, or the coil diameter of the second coil group 12 may be set to be larger. In the embodiment shown in fig. 3, the coil diameter of the first coil group 11 is larger than that of the second coil group 12, and the upper portion of the second coil group 12 is contained in the first coil group 11. In fig. 3, the magnetic substance 20 is disposed on the housing 30 at a middle position of the second coil group 12, and an upper end thereof extends into the first coil group 11. Compared with the embodiment of fig. 2, the diameters of the coils of the two coil sets 10 are different, so that the two coil sets 10 can be partially contained, thereby further reducing the volume of the speaker. And magnetic substance 20 is set on casing 30 and extends to first coil group 11, make first coil group 11 and second coil group 12 can share a magnetic substance 20, avoid setting up magnetic substance 20 on vibrating diaphragm 40, alleviate vibrating diaphragm 40 burden, vibrating diaphragm 40 amplitude is bigger under the same condition, the performance of speaker is better.
Of course, as shown in fig. 4, the coil diameter of the first coil group 11 may be set smaller than the coil diameter of the second coil group 12, and the volume of the speaker may be further reduced.
The first coil group 11 and the second coil group 12 have the same structure and are both coil groups 10. In order to make the present invention more detailed, the structure of the coil assembly 10 will be described in detail below.
According to Maxwell's magnetic force equation:
after simplification, B ═ mu0μrni, wherein, μ0Is a vacuum permeability, murIs the metal permeability, n is the number of coils, and i is the current. It can be seen that the magnitude of the magnetic field generated by the magnetic structure is related to the number of coils of the coil assembly 10, and when the number of coils is increased, the magnetic field generated by the magnetic structure is increased.
As shown in fig. 5 and 6, the coil assembly 10 is manufactured by using a semiconductor technology, a micro-electro-mechanical technology, or a circuit board technology in order to maximize the number of coil turns of the coil assembly 10. The coil assembly 10 is composed of at least one coil layer 101, and each coil layer 101 is provided with a first connection end 1011 and a second connection end 1012. When the coil assembly 10 is formed by a coil layer 101, the first connection end 1011 and the second connection end 1012 of the coil layer 101 are respectively connected to an external power source.
When the coil assembly 10 is composed of more than two coil layers 101, the coil current directions of the more than two coil layers 101 are the same or opposite; an insulating layer 102 is disposed between two adjacent coil layers 101, and the insulating layer 102 has a recess 1021 for accommodating the magnetic conductive material 20.
When the coil current directions of more than two coil layers are opposite, the number of the coil layers in the two current directions is not equal. But to ensure that the magnetic fields of the first coil assembly and the second coil assembly are opposite in direction. For example, when the first coil group and the second coil group each include coil layers having opposite current directions, if the first coil layer includes a larger number of coil layers in the clockwise direction, the second coil layer needs to include a larger number of coil layers in the counterclockwise direction.
When the coil current directions of more than two coil layers are the same, the more than two coil layers 101 can be connected in parallel; or can be connected in series; it is also possible that some coil layers 101 are connected in series and some coil layers 101 are connected in parallel.
As shown in fig. 7, when two or more coil layers 101 are connected in parallel, the winding directions of the coils of all the coil layers 101 of the coil assembly 10 are the same, the first connection terminals 1011 of all the coil layers 101 are commonly connected to the positive electrode or the negative electrode of the external power source, and the second connection terminals 1012 of all the coil layers 101 are commonly connected to the negative electrode or the positive electrode of the external power source.
As shown in fig. 8 and 9, when two or more coil layers 101 are connected in series, the winding directions of the cavities of two adjacent coil layers are opposite. Specifically, when the first connection end 1011 of the first layer coil layer 101 of the coil assembly 10 is connected with an external power supply, the first connection end 1011 or the second connection end 1012 of the last layer coil layer 101 is connected with the external power supply; the first connecting end 1011 of the other odd coil layer 101 is connected with the first connecting end 1011 of the previous coil layer 101, and the second connecting end 1012 is connected with the second connecting end 1012 of the next coil layer 101; the second connection terminal 1012 of the even-numbered coil layer 101 is connected to the second connection terminal 1012 of the upper coil layer 101, and the first connection terminal 1011 is connected to the first connection terminal 1011 of the lower coil layer 101. When the second connection end 1012 of the first layer coil layer 101 of the coil assembly is connected to an external power supply, the first connection end 1011 or the second connection end 1012 of the last layer coil layer 101 is connected to the external power supply. The second connecting end 1012 of the odd coil layer 101 in the other coil layers 101 is connected with the second connecting end 1012 of the previous coil layer 101, and the first connecting end 1011 is connected with the first connecting end 1011 of the next coil layer 101; the first connection end 1011 of the even number coil layer 101 is connected to the first connection end 1011 of the previous coil layer 101, and the second connection end 1012 is connected to the second connection end 1012 of the next coil layer 101.
In addition to the above, the connection terminal of the first coil layer 101 to the power supply may be led out to the last coil layer 101. Two connecting ends of the coil group 10 connected with an external power supply are positioned at the same side, so that subsequent power-on connection is facilitated.
Because the coil group is manufactured by adopting a semiconductor technology, a micro electro mechanical technology or a circuit board technology, the thickness of each coil layer 101 of the coil group 10 is about 90nm, even if 100 layers of coils are etched, the thickness of the whole coil group is 9 mu m, and the maximum coil number is set in a minimum space, so that the maximization of the coils is realized, and the magnetic field intensity of the magnetic structure is improved. Assuming that a coil assembly is provided with 100 coil layers 101 and 100 coils are etched per coil layer 101, one coil assembly 10 can produce 10000 coils.
On the basis of the maximization of the coil, the magnetic conductive material 20 located in the coil assembly 10 effectively collects the magnetic field generated by the coil assembly, so that the collected and concentrated magnetic field can have stronger magnetic force. The magnetic conductive material 20 may be a mu alloy, a permalloy, an electric furnace steel, or the like.
Each coil layer 101 of the coil assembly 10 shown in fig. 10-11 may be formed from a coil, which may be in the form of a concentric spiral, concentric rectangle, or other geometric shape. As shown in fig. 12, each coil layer 101 may be formed by a plurality of coils, and the plurality of coils may be connected in parallel or in series. The coil layer may be either an air coil to be filled with a magnetic permeability substance or a solid coil (as shown in fig. 13).
When the speaker is used to deliver high-pitched sound, the coil layers 101 of the coil assembly 10 may be connected in series, as may the coils of each coil layer 101. When the loudspeaker is used for delivering bass, the coil layers 101 of the coil assembly 10 may be connected in parallel, and the coils of each coil layer 101 may also be connected in parallel.
The key point of the utility model is that magnet and wire coil in the current speaker are replaced through two coil assembly 10 to reduce the volume of the magnetic structure of speaker, and then reduce the whole volume of speaker. And simultaneously, the utility model discloses set up magnetic conductive material 20 at an at least coil assembly 10, this magnetic conductive material is equivalent to the magnetic conduction post, and it can the effectual produced magnetic field of collection coil assembly, makes to collect the magnetic field after concentrating and can possess stronger magnetic force for the coil realizes maximize magnetic field intensity in narrow and small space range, thereby improves the performance of loudspeaker on the basis of speaker volume miniaturization.
Furthermore, the utility model discloses a coil assembly 10 adopts the semiconductor technology etching to form for coil assembly 10 can comprise a plurality of coil layers 101 in minimum space, makes the number of turns of coil assembly 10 improve greatly from this, has further realized the intensity in the limited maximize magnetic field in narrow and small space, has further improved the performance of magnetic diaphragm, makes planar speaker more feasible.
The above description is only an embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.
Claims (15)
1. A magnetic structure of a speaker, characterized in that: the magnetic field direction of the first coil group is opposite to that of the second coil group.
2. The magnetic structure of a loudspeaker according to claim 1, wherein: at least one coil group is provided with a magnetic substance.
3. The magnetic structure of a loudspeaker according to claim 1, wherein: the diameters of the two coil groups are the same, and a distance exists between the lower end face of the first coil group and the upper end face of the second coil group.
4. The magnetic structure of a loudspeaker according to claim 1, wherein: the diameters of the two coil groups are different, the second coil group is provided with a magnetic substance, and the upper end of the magnetic substance extends into the first coil group.
5. The magnetic structure of a loudspeaker according to claim 4, wherein: the coil block portion having a small coil diameter is contained in the coil block having a large coil diameter.
6. The magnetic structure of a loudspeaker according to claim 1, wherein: the coil group is composed of at least one coil layer, and when the coil group is composed of more than two coil layers, the coil current directions of the more than two coil layers are the same or opposite;
when the coil current directions of more than two coil layers are opposite, the number of the coil layers in the two current directions is not equal.
7. The magnetic structure of a loudspeaker according to claim 2, wherein: the coil group is composed of at least one coil layer, and when the coil group is composed of more than two coil layers, the coil current directions of the more than two coil layers are the same or opposite;
when the coil current directions of more than two coil layers are opposite, the number of the coil layers in the two current directions is not equal.
8. The magnetic structure of a loudspeaker according to claim 6 or 7, wherein: the coil layer comprises at least one coil, and when the coil layer comprises more than two coils, the more than two coils are connected in series and/or in parallel.
9. The magnetic structure of a loudspeaker according to claim 6, wherein: an insulating layer is arranged between two adjacent coil layers of the coil assembly.
10. The magnetic structure of a loudspeaker according to claim 7, wherein: an insulating layer is arranged between two adjacent coil layers of the coil assembly.
11. The magnetic structure of a loudspeaker according to claim 10, wherein: the insulating layer is provided with a abdicating hole; the magnetic conductive substance is arranged in the abdicating hole.
12. The magnetic structure of a loudspeaker according to claim 6 or 7, wherein: the coil layers of the coil group are connected in series or in parallel.
13. The magnetic structure of a loudspeaker according to claim 12, wherein: when the coil groups are connected in series, the winding directions of two adjacent coils are opposite.
14. The magnetic structure of a loudspeaker according to claim 13, wherein: the coil layer is provided with a first connecting end and a second connecting end;
the first connecting end of the first layer of coil layer of the coil group is connected with an external power supply, and the first connecting end or the second connecting end of the last layer of coil layer is connected with the external power supply; the first connecting ends of the other odd coil layers are connected with the first connecting end of the previous coil layer, and the second connecting ends are connected with the second connecting end of the next coil layer; the second connecting end of the even number of coil layers is connected with the second connecting end of the upper coil layer, and the first connecting end is connected with the first connecting end of the lower coil layer;
or the second connecting end of the first layer coil layer of the coil group is used as one connecting end of the coil group to be connected with an external power supply, and the first connecting end or the second connecting end of the last layer coil layer is used as the other connecting end of the coil group to be connected with the external power supply; the second connecting end of the odd coil layer in the other coil layers is connected with the second connecting end of the previous coil layer, and the first connecting end is connected with the first connecting end of the next coil layer; the first connecting end of the even number coil layer is connected with the first connecting end of the upper coil layer, and the second connecting end of the even number coil layer is connected with the second connecting end of the lower coil layer.
15. The magnetic structure of a loudspeaker according to claim 12, wherein: when the coil groups are connected in parallel, the winding directions of the coils of all the coil layers are the same; the first connecting ends of all the coil layers are connected with the positive pole or the negative pole of an external power supply together, and the second connecting ends of all the coil layers are connected with the negative pole or the positive pole of the external power supply together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020237128.0U CN211909151U (en) | 2020-03-02 | 2020-03-02 | Magnetic structure of loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020237128.0U CN211909151U (en) | 2020-03-02 | 2020-03-02 | Magnetic structure of loudspeaker |
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| Publication Number | Publication Date |
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| CN211909151U true CN211909151U (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020237128.0U Active CN211909151U (en) | 2020-03-02 | 2020-03-02 | Magnetic structure of loudspeaker |
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| CN (1) | CN211909151U (en) |
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