CN109495824B - Loudspeaker magnetic circuit and digital loudspeaker - Google Patents
Loudspeaker magnetic circuit and digital loudspeaker Download PDFInfo
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- CN109495824B CN109495824B CN201811629052.XA CN201811629052A CN109495824B CN 109495824 B CN109495824 B CN 109495824B CN 201811629052 A CN201811629052 A CN 201811629052A CN 109495824 B CN109495824 B CN 109495824B
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- magnetizer
- magnetic
- magnetizers
- loudspeaker
- conductive winding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The invention relates to the field of loudspeakers, in particular to a loudspeaker magnetic circuit and a digital loudspeaker, wherein a conductive winding is electrified, the magnetic field intensity at a magnetic gap is larger, and the excessive exploitation of non-renewable materials is reduced; the voice coil arranged in the magnetic gap vibrates according to the change of the magnetic force, and then the vibrating diaphragm is driven to vibrate to produce sound.
Description
Technical Field
The invention relates to the field of loudspeakers, in particular to a loudspeaker magnetic circuit and a digital loudspeaker.
Background
The loudspeaker is a transducer for converting an electric signal into an acoustic signal, and the quality of the loudspeaker has great influence on the sound quality. The loudspeaker is the weakest component in the audio equipment, and is the most important component for the audio effect.
Chinese invention with publication number CN204090139U discloses a speaker unit, which comprises: a support; a magnetic circuit supported by the bracket; a voice coil disposed in a magnetic gap of the magnetic circuit and capable of vibrating according to a change in magnetic force; the outer peripheral end of the vibrating diaphragm is connected to the support through a folding ring, the inner peripheral end of the vibrating diaphragm is connected to the voice coil through a centering support sheet, a magnetic circuit is formed by combining and bonding an upper clamping plate, a magnet and a magnetizer (T iron), and a cylindrical magnetic gap is formed between the inner side surface of the upper clamping plate and the magnetizer.
The quality of the magnet has a great influence on the sensitivity of the loudspeaker, and the magnet with better quality is made of a permanent magnet and is limited in material.
Disclosure of Invention
It is an object of the present invention to provide a speaker magnetic circuit having an effect of reducing the use of permanent magnets.
The above object of the present invention is achieved by the following technical solutions:
the loudspeaker magnetic circuit comprises a magnetizer which is annularly arranged, one side of the magnetizer is disconnected, one side of the magnetizer, which is opposite to the disconnection position of the magnetizer, protrudes towards the disconnection position of the opposite side to form a magnetic conduction column, a magnetic gap is formed between the magnetic conduction column and the disconnection position of the magnetizer, the magnetizer is segmented by the magnetic conduction column, and each segment of the magnetizer is wound with a conductive winding.
By adopting the technical scheme, the conductive winding is electrified, the magnetic field intensity at the magnetic gap is larger, the magnet in the prior art is replaced to generate a magnetic field, the use of rare materials such as a permanent magnet is reduced, and the excessive exploitation of non-renewable materials is reduced.
The invention is further configured to: the conductive winding is connected with a control circuit for controlling the on-off of current on the conductive winding.
By adopting the technical scheme, the current flowing through the conductive winding is adjusted through the control circuit, and the magnetic field intensity at the magnetic gap is kept.
The invention is further configured to: the control circuit comprises a control tube connected with a power supply loop of the conductive winding, and the control tube receives a PWM control signal to control the on-off of the control tube.
By adopting the technical scheme, the on-off of the control tube is controlled through the PWM control signal so as to control the current flowing through the conductive winding, and thus the magnetic field intensity at the magnetic gap is controlled.
Another object of the present invention is to provide a magnetic circuit for a speaker, which has an effect of reducing the use of permanent magnets.
The above object of the present invention is achieved by the following technical solutions:
the loudspeaker magnetic circuit comprises two magnetizers which are annularly arranged, the two magnetizers are in cross connection, the two magnetizers are disconnected at one of the intersections, the other intersection of the two magnetizers protrudes towards the disconnection on the opposite side to form a magnetizer column, a magnetic gap is formed between the magnetizer column and the disconnection of the magnetizer, the magnetizer column segments the magnetizer, and each section of the magnetizer is wound with a conductive winding.
By adopting the technical scheme, the conductive winding is electrified, the magnetic field intensity at the magnetic gap is larger, the magnet in the prior art is replaced to generate a magnetic field, the use of rare materials such as permanent magnets is reduced, the excessive exploitation of non-renewable materials is reduced, the breakpoints of the magnetizer are distributed around the magnetic conduction column, the magnetic field intensity in the magnetic gap is more concentrated, the sensitivity is higher, and the magnetic field intensity at the magnetic gap can be controlled by adjusting the current flowing through the conductive winding, so that the requirements of various use scenes are met.
The invention is further configured to: the conductive winding is connected with a control circuit for controlling the on-off of current on the conductive winding.
By adopting the technical scheme, the current flowing through the conductive winding is adjusted through the control circuit, and the magnetic field intensity at the magnetic gap is kept.
The invention is further configured to: the control circuit comprises a control tube connected with a power supply loop of the conductive winding, and the control tube receives a PWM control signal to control the on-off of the control tube.
By adopting the technical scheme, the on-off of the control tube is controlled through the PWM control signal so as to control the current flowing through the conductive winding, and thus the magnetic field intensity at the magnetic gap is controlled.
It is a further object of the present invention to provide a magnetic circuit for a speaker, which has the effect of reducing the use of permanent magnets.
The above object of the present invention is achieved by the following technical solutions:
the loudspeaker magnetic circuit comprises a plurality of magnetizers which are annularly arranged, the magnetizers are in cross connection, cross points among the magnetizers are located at the same position, the magnetizers are disconnected at one cross position, the other cross position of the magnetizers protrudes towards the opposite side of the disconnection position to form a magnetic conduction column, a magnetic gap is formed between the magnetic conduction column and the disconnection position of the magnetizer, the magnetizer is segmented by the magnetic conduction column, and each segment of the magnetizer is wound with a conductive winding.
By adopting the technical scheme, the conductive winding is electrified, the magnetic field intensity at the magnetic gap is larger, the magnet in the prior art is replaced to generate a magnetic field, the use of rare materials such as permanent magnets is reduced, the excessive exploitation of non-renewable materials is reduced, the breakpoints of the magnetizer are distributed around the magnetic conduction column, the magnetic field intensity in the magnetic gap is more concentrated, the sensitivity is higher, and the magnetic field intensity at the magnetic gap can be controlled by adjusting the current flowing through the conductive winding, so that the requirements of various use scenes are met.
It is a fourth object of the present invention to provide a digital speaker having an effect of reducing the use of permanent magnets.
The above object of the present invention is achieved by the following technical solutions:
the digital loudspeaker comprises the loudspeaker magnetic circuit and a support for supporting the loudspeaker magnetic circuit, wherein a voice coil is placed in a magnetic gap, a centering support piece is fixed on the outer side, close to the magnetic gap, of the loudspeaker magnetic circuit of the support, the inner side of the centering support piece is connected to the voice coil, and a vibrating diaphragm is connected between the support and the centering support piece.
Through adopting above-mentioned technical scheme, circular telegram conductive winding, the magnetic field intensity in magnetic gap department is great, reduces the excessive exploitation of non-renewable material, and the voice coil loudspeaker voice coil of arranging the magnetic gap in vibrates according to the magnetic force change, and then drives the vibrating diaphragm vibrations and carry out the sound production, replaces the magnet among the prior art and produces magnetic field, has reduced the use of rare materials such as permanent magnet.
Preferably, a power amplifier is connected to the voice coil.
Through adopting above-mentioned technical scheme, carry out power amplification to the voice coil loudspeaker voice coil through power amplifier, improve sensitivity.
Preferably, the magnetizer is wound with a power supply winding, the power supply winding is connected with a rectifying circuit, and the output end of the rectifying circuit is connected with the power supply end of the power amplifier.
By adopting the technical scheme, the power supply winding induces electromotive force in the magnetizer, so that a power supply is provided for the power amplifier, and the volume of the digital loudspeaker is effectively reduced.
In conclusion, the beneficial technical effects of the invention are as follows:
1. electrifying the conductive winding, wherein the magnetic field intensity conducted at the magnetic gap is larger, and the excessive exploitation of the non-renewable materials is reduced;
2. the on-off of the control tube is controlled through the PWM control signal so as to control the current flowing through the conductive winding and keep the magnetic field intensity at the magnetic gap;
3. the voice coil arranged in the magnetic gap vibrates according to the change of the magnetic force, and then the vibrating diaphragm is driven to vibrate to produce sound.
Drawings
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is a schematic view showing the relationship between the flux guiding pole and the flux conductor in example 1;
FIG. 3 is a schematic view showing the relationship between the flux guiding pole and the flux conductor in embodiment 2;
FIG. 4 is a schematic view showing the relationship between the flux guiding pole and the flux conductor in embodiment 3;
FIG. 5 is a schematic structural view of example 4.
Reference numerals: 1. a magnetizer; 2. a magnetically conductive post; 3. a magnetic gap; 4. a conductive winding; 5. a control tube; 6. a support; 7. a voice coil; 8. a centering support; 9. vibrating diaphragm; 10. a dust cover; 11. folding the ring; 12. a power supply winding; 13. a power amplifier; 14. a rectifier circuit.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1: the magnetic circuit of the loudspeaker, referring to fig. 1 and 2, includes a magnetizer 1 disposed in a square ring shape, and one side of the magnetizer 1 is broken, wherein fig. 2 is a schematic view viewed from the broken side of the magnetizer 1 toward the opposite side.
One side of the magnetizer 1 opposite to the break part thereof protrudes towards the break part on the opposite side to form a cylindrical magnetizer column 2, the magnetizer column 2 and the magnetizer 1 are integrally formed, one end of the magnetizer column 2 extends into the break part of the magnetizer 1, and a magnetic gap 3 is formed between the magnetizer column 2 and the break part of the magnetizer 1.
The magnetic conduction column 2 segments the magnetic conductor 1, the magnetic conductor 1 is divided into two sections by taking the magnetic conduction column 2 as a boundary, a conductive winding 4 is wound on each section of the magnetic conductor 1, each conductive winding 4 is connected in an alternating current power supply loop, each conductive winding 4 is connected with a control tube 5, the control tube 5 is preferably an MOS tube, a source electrode and a drain electrode of the control tube 5 are connected in the conductive winding 4 and the power-on loop to control the on-off of the power-on loop of the corresponding conductive winding 4, a grid electrode of the control tube 5 receives PWM control signals to control the on-off of the power-on loop, and the phases of the PWM control signals received by the two control tubes 5 are different, so that the two control tubes 5 are alternately conducted, the magnetic field intensity at the magnetic gap 3 is kept, and the reliability is improved.
The implementation principle of the embodiment is as follows: the conductive winding 4 is electrified, the magnetic field intensity at the magnetic gap 3 is large, a magnet in the prior art is replaced to generate a magnetic field, the use of rare materials such as a permanent magnet is reduced, and the excessive exploitation of non-renewable materials is reduced.
Example 2: the magnetic circuit of the speaker, as shown in fig. 3, includes two magnetizers 1 arranged in a square ring shape, and the two magnetizers 1 are connected in a cross shape, the two magnetizers 1 are arranged in an integrally formed shape, the two magnetizers 1 are disconnected at one of the intersections, the end portions of the adjacent fractures are not in contact with each other, and a cross-sectional view of one of the magnetizers 1 along the axial direction thereof is similar to that of fig. 1.
The other cross part of the two magnetizers 1 protrudes towards the opposite break part to form a magnetizer column 2, the magnetizer column 2 and the magnetizer 1 are integrally formed, a magnetic gap 3 is formed between the magnetizer column 2 and the break part of the magnetizer 1, and the magnetizer column 2 extends into the magnetic gap 3.
The magnetic conduction column 2 segments the magnetic conductor 1, the magnetic conductor 1 is divided into four sections by taking the magnetic conduction column 2 as a boundary, each section of the magnetic conductor 1 is wound with a conductive winding 4, each conductive winding 4 is connected in an alternating current power supply loop, each conductive winding 4 is connected with a control tube 5, a source electrode and a drain electrode of each control tube 5 are connected in the conductive winding 4 and the power-on loop so as to control the on-off of the power-on loop of the corresponding conductive winding 4, a grid electrode of each control tube 5 receives PWM control signals to control the on-off of the control tubes, and the phases of the PWM control signals received by two adjacent control tubes 5 are different, so that the two adjacent control tubes 5 are alternately conducted, the two opposite control tubes 5 are simultaneously conducted, the magnetic field intensity at the magnetic gap 3 is kept, and the reliability is improved.
The implementation principle of the embodiment is as follows: the conductive winding 4 is electrified, the magnetic field intensity at the magnetic gap 3 is large, a magnet in the prior art is replaced to generate a magnetic field, the use of rare materials such as a permanent magnet is reduced, the excessive exploitation of non-renewable materials is reduced, the breakpoints of the magnetizer 1 are distributed around the magnetic conduction column 2, the magnetic field intensity in the magnetic gap 3 is more concentrated, and the sensitivity is higher.
Embodiment 3 a magnetic circuit of a speaker, as shown in fig. 4, includes a plurality of magnetizers 1 arranged in a square ring shape, the magnetizers 1 are connected in a cross manner, a cross point between the magnetizers 1 is located at the same position (i.e., a midpoint of the magnetizer 1), the magnetizers 1 are integrally formed, the magnetizers 1 are disconnected at one of the cross points, ends of adjacent fractures are not in contact with each other, a cross-sectional view of one of the magnetizers 1 along an axial direction thereof is similar to that of fig. 1, in this embodiment, the number of the magnetizers 1 is set to be 3, and an angle between the adjacent magnetizers 1 is 60 degrees.
The other cross part of the magnetizer 1 protrudes towards the opposite break part to form a magnetizer column 2, the magnetizer column 2 and the magnetizer 1 are integrally formed, a magnetic gap 3 is formed between the magnetizer column 2 and the break part of the magnetizer 1, and the magnetizer column 2 extends into the magnetic gap 3.
The magnetic conduction column 2 segments the magnetic conductor 1, the magnetic conductor 1 is divided into six sections by taking the magnetic conduction column 2 as a boundary, each section of the magnetic conductor 1 is wound with a conductive winding 4, each conductive winding 4 is connected in an alternating current power supply loop, each conductive winding 4 is connected with a control tube 5, a source electrode and a drain electrode of each control tube 5 are connected in the conductive winding 4 and an electrifying loop so as to control the on-off of the electrifying loop of the corresponding conductive winding 4, a grid electrode of each control tube 5 receives PWM control signals to control the on-off of the control tube, and the phases of the PWM control signals received by two adjacent control tubes 5 are different, so that three adjacent control tubes 5 are sequentially and alternately conducted, the two control tubes 5 are simultaneously conducted, the magnetic field intensity at the magnetic gap 3 is kept, and the reliability is improved.
The implementation principle of the embodiment is as follows: the conductive winding 4 is electrified, the magnetic field intensity at the magnetic gap 3 is large, a magnet in the prior art is replaced to generate a magnetic field, the use of rare materials such as a permanent magnet is reduced, the excessive exploitation of non-renewable materials is reduced, the breakpoints of the magnetizer 1 are distributed around the magnetic conduction column 2, the magnetic field intensity in the magnetic gap 3 is more concentrated, and the sensitivity is higher.
Example 4: as shown in fig. 5, the digital speaker includes the speaker magnetic circuit according to any of embodiments 1 to 3, and further includes a support 6 for supporting the speaker magnetic circuit, a voice coil 7 is placed in the magnetic gap 3, a centering branch piece 8 is fixed to the support 6 at an outer side of the speaker magnetic circuit close to the magnetic gap 3, an inner side of the centering branch piece 8 is connected to the voice coil 7, a vibrating diaphragm 9 is connected between the support 6 and the centering branch piece 8, an inner ring of the vibrating diaphragm 9 is connected to the centering branch piece 8, an outer ring is connected to the support 6 through a folded ring 11, and a dust cover 10 is connected to an inner ring of the vibrating diaphragm 9.
The voice coil 7 is connected to a power amplifier 13. And the magnetizer 1 is wound with a power supply winding 12, the power supply winding 12 is connected with a rectifying circuit 14, the rectifying circuit 14 is a rectifying bridge, two ends of the power supply winding 12 are respectively connected with two input ends of the rectifying circuit 14, positive and negative output ends of the rectifying circuit 14 are respectively connected with positive and negative input ends of a power supply of a power amplifier 13, the voice coil 8 is subjected to power amplification through the power amplifier 13, the sensitivity is improved, the power supply winding 12 induces electromotive force in the magnetizer 1, the power supply is provided for the power amplifier 13, and the volume of the digital loudspeaker is effectively reduced.
The implementation principle of the embodiment is as follows: the conductive winding 4 is electrified, the magnetic field intensity at the magnetic gap 3 is large, excessive exploitation of non-renewable materials is reduced, the voice coil 7 arranged in the magnetic gap 3 vibrates according to the change of magnetic force, and then the vibrating diaphragm 9 is driven to vibrate to sound, a magnet in the prior art is replaced to generate a magnetic field, and the use of rare materials such as a permanent magnet is reduced.
The above embodiments are all preferred embodiments of the present invention, and the scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (4)
1. Loudspeaker magnetic circuit, its characterized in that: the device comprises a plurality of magnetizers (1) which are annularly arranged, wherein the magnetizers (1) are in cross connection, cross points among the magnetizers (1) are positioned at the same position, the magnetizers (1) are disconnected at one of the cross positions, the other cross position of the magnetizers (1) protrudes towards the opposite side of the disconnection position to form a magnetizer column (2), a magnetic gap (3) is formed between the magnetizer column (2) and the disconnection position of the magnetizer (1), the magnetizer column (2) segments the magnetizer (1) by taking the magnetizer column (2) as a boundary to divide the magnetizer (1) into six segments, each segment of the magnetizer (1) is wound with a conductive winding, each conductive winding is connected to an alternating current power supply loop, each conductive winding is connected with a control tube (5), and a source electrode and a drain electrode of the control tube (5) are connected to the conductive windings and the power supply loop, the on-off of the energizing circuit of the corresponding conductive winding is controlled, the grid electrodes of the control tubes (5) receive PWM control signals to control the on-off of the energizing circuit, and the phases of the PWM control signals received by two adjacent control tubes (5) are different, so that three adjacent control tubes (5) are sequentially and alternately conducted, and two opposite control tubes (5) are simultaneously conducted.
2. Digital speaker, its characterized in that: the loudspeaker magnetic circuit of claim 1, further comprising a support (6) for supporting the loudspeaker magnetic circuit, wherein a voice coil (7) is disposed in the magnetic gap (3), the support (6) is fixed with a centering disk (8) on the outer side of the loudspeaker magnetic circuit close to the magnetic gap (3), the inner side of the centering disk (8) is connected to the voice coil (7), and a diaphragm (9) is connected between the support (6) and the centering disk (8).
3. The digital speaker of claim 2, wherein: the voice coil (7) is connected with a power amplifier (13).
4. The digital speaker of claim 3, wherein: the magnetizer (1) is connected with a power supply winding (12) in a winding mode, the power supply winding (12) is connected with a rectifying circuit (14), and the output end of the rectifying circuit (14) is connected to the power supply end of the power amplifier (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811629052.XA CN109495824B (en) | 2018-12-28 | 2018-12-28 | Loudspeaker magnetic circuit and digital loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811629052.XA CN109495824B (en) | 2018-12-28 | 2018-12-28 | Loudspeaker magnetic circuit and digital loudspeaker |
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| Publication Number | Publication Date |
|---|---|
| CN109495824A CN109495824A (en) | 2019-03-19 |
| CN109495824B true CN109495824B (en) | 2020-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811629052.XA Active CN109495824B (en) | 2018-12-28 | 2018-12-28 | Loudspeaker magnetic circuit and digital loudspeaker |
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| Country | Link |
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| CN (1) | CN109495824B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111225322B (en) * | 2019-11-25 | 2021-10-08 | 歌尔股份有限公司 | Speaker and electronic apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86210295U (en) * | 1986-12-10 | 1987-12-23 | 黄承昂 | Dc electric loudspeaker |
| CN2935688Y (en) * | 2006-07-07 | 2007-08-15 | 常州美欧电子有限公司 | Parallel magnetic structure loudspeaker |
| CN105208485A (en) * | 2015-11-06 | 2015-12-30 | 珠海丽磁音响有限公司 | Excitation earphones |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190995C (en) * | 2003-03-03 | 2005-02-23 | 胡修恩 | Signal excitation type electric microphone system |
| JP6185112B2 (en) * | 2016-05-17 | 2017-08-23 | ヤマウチ株式会社 | Exciter |
-
2018
- 2018-12-28 CN CN201811629052.XA patent/CN109495824B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86210295U (en) * | 1986-12-10 | 1987-12-23 | 黄承昂 | Dc electric loudspeaker |
| CN2935688Y (en) * | 2006-07-07 | 2007-08-15 | 常州美欧电子有限公司 | Parallel magnetic structure loudspeaker |
| CN105208485A (en) * | 2015-11-06 | 2015-12-30 | 珠海丽磁音响有限公司 | Excitation earphones |
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| Publication number | Publication date |
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| CN109495824A (en) | 2019-03-19 |
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