CN109379683B - Sounding device - Google Patents
Sounding device Download PDFInfo
- Publication number
- CN109379683B CN109379683B CN201811314572.1A CN201811314572A CN109379683B CN 109379683 B CN109379683 B CN 109379683B CN 201811314572 A CN201811314572 A CN 201811314572A CN 109379683 B CN109379683 B CN 109379683B
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- 230000005236 sound signal Effects 0.000 claims abstract description 22
- 238000004804 winding Methods 0.000 claims description 25
- 230000000694 effects Effects 0.000 abstract description 5
- 230000005672 electromagnetic field Effects 0.000 description 5
- 230000002441 reversible effect Effects 0.000 description 5
- 230000002708 enhancing effect Effects 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
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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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The invention discloses a sound generating device. The sound generating device includes: the vibration assembly comprises a vibrating diaphragm and a voice coil, the voice coil is connected to one side of the vibrating diaphragm, the edge of the vibrating diaphragm is fixed in the sound generating device, and the voice coil is configured to be capable of inputting sound signals; a magnetic circuit system in which a magnetic gap is formed, the magnetic gap is provided with a magnetic field, and the voice coil is suspended in the magnetic gap; an auxiliary coil disposed in the magnetic gap, the auxiliary coil configured to be capable of passing an auxiliary signal to generate an electromagnetic force on the voice coil. The invention has the technical effect that the acoustic performance of the sound generating device is improved.
Description
Technical Field
The invention relates to the technical field of electroacoustic, in particular to a sound generating device.
Background
The sound generating device is an important acoustic component of portable electronic equipment, is a device for realizing electric signal and acoustic signal conversion, and is commonly used in electronic equipment such as mobile phones, computers and the like. The sound generating device is generally composed of a vibration system, a magnetic circuit system and an auxiliary system; the vibration system comprises a top of the ball, a vibrating diaphragm and a voice coil, and the arrangement mode of the voice coil is an important factor influencing the acoustic performance of the sound generating device.
Fig. 1 shows a schematic cross-sectional view of a prior art sound generating device, as shown in fig. 1, a voice coil 12 is located in a magnetic circuit system formed by a center magnet 21, a side magnet 22 and a lower magnetic conductive plate, when an electric signal is input into the voice coil 12, the voice coil 12 is electrified to be under electromagnetic induction action in a magnetic field, and to be moved under the action of ampere force and drive a vibrating diaphragm 11 to vibrate.
However, in such a design, problems such as uneven magnetic gap and excessive vibration amplitude of the voice coil tend to cause problems such as poor acoustic performance of the sound generating device.
Therefore, there is a need for a new sound generating device that overcomes the above-mentioned drawbacks.
Disclosure of Invention
An object of the present invention is to provide a new solution for a sound generating device.
According to a first aspect of the present invention, there is provided a sound emitting device comprising:
The vibration assembly comprises a vibrating diaphragm and a voice coil, the voice coil is connected to one side of the vibrating diaphragm, the edge of the vibrating diaphragm is fixed in the sound generating device, and the voice coil is configured to be capable of inputting sound signals;
A magnetic circuit system in which a magnetic gap is formed, the magnetic gap is provided with a magnetic field, and the voice coil is suspended in the magnetic gap;
An auxiliary coil disposed in the magnetic gap, the auxiliary coil configured to be capable of passing an auxiliary signal to generate an electromagnetic force on the voice coil.
Optionally, the auxiliary coil is located at the bottom of the magnetic gap.
Optionally, an axis of the auxiliary coil coincides with an axis of the voice coil.
Optionally, the projection of the auxiliary coil along the own axis overlaps with the projection of the voice coil along the own axis.
Optionally, the magnetic circuit system includes a side magnetic part, a central magnetic part and a lower magnetic conductive plate, the central magnetic part and the side magnetic part are disposed on the lower magnetic conductive plate, the side magnetic part surrounds the central magnetic part, and the magnetic gap is formed between the side magnetic part and the central magnetic part.
Optionally, the auxiliary coil is disposed on the lower magnetic conductive plate.
Optionally, the auxiliary coil is disposed on a side wall of the central magnetic portion facing the side magnetic portion;
or the auxiliary coil is arranged on the side wall of the side magnetic part facing the central magnetic part.
Optionally, the auxiliary coil is configured to be capable of supplying an acoustic signal as the auxiliary signal in synchronization with the voice coil.
Optionally, the auxiliary signal has the same frequency as the sound signal, and the auxiliary signal has a strength smaller than the sound signal.
Optionally, a winding direction of the auxiliary coil is opposite to a winding direction of the voice coil;
Or the winding direction of the auxiliary coil is the same as the winding direction of the voice coil.
The invention has the technical effects that the Q value of the sound generating device is adjusted by arranging the auxiliary coil in the magnetic gap of the magnetic circuit system of the sound generating device and introducing signals to the auxiliary coil and generating vibration enhancing acting force or vibration inhibiting acting force on the voice coil by utilizing the magnetic field generated after the auxiliary coil is electrified, so that the acoustic performance of the sound generating device is improved.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic cross-sectional view of a prior art sound emitting device;
fig. 2 is a schematic cross-sectional structure of a sound generating apparatus according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Fig. 1 shows a schematic cross-sectional structure of a sound emitting device according to the prior art, and fig. 2 shows a schematic cross-sectional structure of a sound emitting device according to an embodiment of the present invention, where the schematic diagram shows an alternative arrangement of auxiliary coils in the sound emitting device. The structure, principle, etc. of the sound generating apparatus of the present invention will now be described in detail by taking fig. 1 and 2 as examples.
The invention provides a sound generating device, which comprises a vibration assembly 10, a magnetic circuit system 20 and an auxiliary coil 30. The vibration assembly 10 comprises a diaphragm 11 and a voice coil 12, the edge of the diaphragm 11 being fixed in the sound generating device, for example in the housing of the sound generating device. The voice coil 12 is connected to one side of the diaphragm 11, the voice coil 12 is configured to be capable of inputting a sound signal, and the voice coil 12 vibrates to drive the diaphragm 11 connected with the voice coil to vibrate through the input sound signal, so that conversion between an electric signal and a sound signal is achieved. Wherein, be formed with the magnetic gap in the magnetic circuit, the magnetic gap is the clearance between interior magnetic circuit and the limit magnetic circuit, the voice coil loudspeaker voice coil is hung and is located in the magnetic gap.
Further, the auxiliary coil is disposed in the magnetic gap. The auxiliary coil may be disposed at the bottom, middle, two sides or any other position of the magnetic gap, and the number of turns, the height, the shape and the like of the winding of the auxiliary coil are not particularly limited in this embodiment. The auxiliary coil is configured to be capable of passing an auxiliary signal to generate an electromagnetic force on the voice coil.
Wherein, the auxiliary coil to which the auxiliary signal is applied can generate a vibration enhancing force or a vibration suppressing force to the voice coil. It will be appreciated that the vibration-enhancing force and the vibration-suppressing force are two opposing forces, namely, the vibration-enhancing force is a forward force and the vibration-suppressing force is a reverse force. In this way, the auxiliary coil can generate a forward or reverse force on the voice coil to adjust the acoustic performance of the sound generating device. Because the auxiliary coil is arranged in the magnetic gap, other spaces in the sounding device cannot be occupied, and the space in the sounding device is saved while the Q value (qual ity factor) of the sounding device is regulated.
According to the sound generating device provided by the embodiment, the auxiliary coil is arranged in the magnetic gap of the magnetic circuit system of the sound generating device, signals are fed to the auxiliary coil, and the magnetic field generated after the auxiliary coil is electrified is used for generating vibration enhancement acting force or vibration inhibition acting force on the voice coil, so that the Q value of the sound generating device is adjusted.
Optionally, the auxiliary coil is located at the bottom of the magnetic gap. An auxiliary signal, which may be an electrical signal in the same or opposite direction as the acoustic signal to the voice coil, is applied to the auxiliary coil, which generates a new electromagnetic field. By changing the direction of the electric signal flowing into the auxiliary coil and the winding direction of the auxiliary coil, a new electromagnetic field having the same or opposite direction to the original magnetic field can be obtained. Therefore, the auxiliary coil at the bottom of the magnetic gap can generate forward or reverse acting force on the voice coil moving in the magnetic field, so that the Q value of the sound generating device is influenced, and the acoustic performance of the sound generating device is improved. Because the auxiliary coil does not vibrate, the auxiliary coil is arranged at the bottom of the magnetic gap, adverse effects on the sounding device are avoided, and meanwhile, the internal space of the sounding device is saved.
Specifically, the axis of the auxiliary coil 30 coincides with the axis of the voice coil 12. As shown in fig. 2, the auxiliary coil 30 is disposed at the bottom of the magnetic gap, and the auxiliary coil 30 is superposed on the axis of the voice coil 12, and the auxiliary coil disposed at the bottom of the sound generating device is disposed so as to face the voice coil in the magnetic gap. Therefore, the auxiliary coil has better effect of generating forward or reverse acting force on the voice coil, and the Q value of the sound generating device can be effectively improved when the forward acting force is generated on the voice coil; when the reverse acting force is generated on the voice coil, the Q value of the sound generating device can be reduced, the displacement of the sound generating device is reduced, and the distortion is improved.
Preferably, the projection of the auxiliary coil along the own axis overlaps with the projection of the voice coil along the own axis. Like this, the width of voice coil loudspeaker voice coil and auxiliary coil is the same, and the cooperation effect of voice coil loudspeaker voice coil and auxiliary coil is better, helps promoting auxiliary coil and adjusts the efficiency of voice coil loudspeaker voice coil, is showing and is promoting sound generating mechanism's acoustic performance.
Further, the magnetic circuit system 20 includes a side magnetic portion 22, a center magnetic portion 21, and a lower magnetic conductive plate 23. The center magnetic portion 21 and the side magnetic portion 22 are provided on the lower magnetic conductive plate 23, the side magnetic portion 22 surrounds the center magnetic portion 21, and the magnetic gap is formed between the side magnetic portion 22 and the center magnetic portion 21. In this embodiment, the central magnetic portion is formed by a central magnet, the side magnetic portion is formed by two side magnets, the two side magnets are respectively disposed on both sides of the central magnet, and the side magnets and the central magnet are located on the same plane. Thus, a magnetic gap is formed between the side magnet and the center magnet.
In one possible embodiment, the auxiliary coil 30 is disposed on the lower magnetically permeable plate 23. As shown in fig. 2, the auxiliary coil 30 is disposed at the bottom of the magnetic gap and is disposed on the lower magnetically permeable plate 23, and a new electromagnetic field is generated by applying an auxiliary signal to the auxiliary coil. The auxiliary coil is formed by winding copper wires, and the winding direction of the auxiliary coil and the winding direction of the voice coil can be the same or opposite; the direction of the incoming auxiliary signal and the direction of the voice signal to the voice coil may be the same or opposite.
It will be appreciated that in this embodiment, the auxiliary signal and the sound signal are in the same direction or opposite directions, for example, when the auxiliary signal and the sound signal are electric signals with the same frequency, the waveform of the auxiliary signal is a sine curve, and the waveform of the sound signal is a cosine curve; at this time, the auxiliary signal and the sound signal are opposite, and when the waveforms of the auxiliary signal and the sound signal are the same, the auxiliary signal and the sound signal are the same.
Specifically, the winding direction and the direction of the input signal are controlled, so that the acting force of the auxiliary coil on the voice coil can be changed. When the winding direction of the auxiliary coil is the same as the winding direction of the voice coil and the auxiliary signal is a signal having the same direction and frequency as the voice signal, the auxiliary coil is configured to generate a vibration enhancing force on the voice coil. The vibration enhancing acting force can improve the Q value of the sounding device. Or when the winding direction of the auxiliary coil is opposite to the winding direction of the voice coil, the auxiliary signal is a signal consistent with the direction of the sound signal and the frequency is consistent, and the auxiliary coil is configured to generate vibration suppressing force on the voice coil. The vibration suppressing acting force can reduce the Q value and displacement of the sound generating device and improve the distortion.
In another possible embodiment, the auxiliary coil 30 is disposed on a side wall of the central magnetic portion 21 facing the side magnetic portion 22; or the auxiliary coil is provided on a side wall of the side magnetic portion 22 facing the center magnetic portion 21. That is, the auxiliary coil may be disposed at any position below the voice coil and within the magnetic gap, and the auxiliary coil may be disposed toward the side wall of the side magnetic portion or toward the side wall of the center magnetic portion, and the disposed position of the auxiliary coil in this embodiment is not particularly limited.
In this embodiment, the winding direction of the auxiliary coil and the winding direction of the voice coil may be the same or opposite; the direction of the incoming auxiliary signal and the direction of the voice signal to the voice coil may be the same or opposite. When the winding direction of the auxiliary coil is the same as the winding direction of the voice coil, and the auxiliary signal is a signal opposite to the direction of the sound signal and having the same frequency, the auxiliary coil is configured to generate a vibration suppressing force on the voice coil. Or when the winding direction of the auxiliary coil is opposite to the winding direction of the voice coil, and the auxiliary signal is a signal opposite to the direction of the sound signal and having a uniform frequency, the auxiliary coil is configured to generate a vibration strengthening force on the voice coil.
Optionally, the auxiliary coil is configured to be capable of supplying an acoustic signal as the auxiliary signal in synchronization with the voice coil. In such an embodiment, the auxiliary coil may be in series or parallel with the voice coil to conduct with an external circuit; or the auxiliary coil alone is in communication with an external circuit.
In this embodiment, the intensity of the auxiliary signal is smaller than the intensity of the sound signal. For example, when the sound signal is an electrical signal, the electrical signal is fed to the auxiliary coil arranged at the bottom of the magnetic gap, so that a new electromagnetic field can be generated, the new electromagnetic field can generate acting force on the voice coil, the winding direction and the electrical signal direction of the auxiliary coil relative to the voice coil are changed, and the direction of the acting force can be adjusted, so that the Q value of the sound generating device is improved or reduced, and better acoustic performance is achieved.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (7)
1. A sound emitting device, comprising:
The vibration assembly comprises a vibrating diaphragm and a voice coil, the voice coil is connected to one side of the vibrating diaphragm, the edge of the vibrating diaphragm is fixed in the sound generating device, and the voice coil is configured to be capable of inputting sound signals;
A magnetic circuit system in which a magnetic gap is formed, the magnetic gap is provided with a magnetic field, and the voice coil is suspended in the magnetic gap;
An auxiliary coil disposed in the magnetic gap, the auxiliary coil configured to be capable of passing an auxiliary signal to generate a vibration-enhancing force or a vibration-suppressing force on the voice coil;
The axis of the auxiliary coil is coincident with the axis of the voice coil, the projection of the auxiliary coil along the axis of the auxiliary coil overlaps with the projection of the voice coil along the axis of the auxiliary coil, and the auxiliary coil is positioned at the bottom of the magnetic gap.
2. The sound generating apparatus according to claim 1, wherein the magnetic circuit system includes a side magnetic portion, a center magnetic portion, and a lower magnetic conductive plate, the center magnetic portion and the side magnetic portion being disposed on the lower magnetic conductive plate, the side magnetic portion surrounding the center magnetic portion, the magnetic gap being formed between the side magnetic portion and the center magnetic portion.
3. The sound emitting apparatus of claim 2 wherein the auxiliary coil is disposed on the lower magnetically permeable plate.
4. The sound generating apparatus according to claim 2, wherein the auxiliary coil is provided on a side wall of the center magnetic portion facing the side magnetic portion;
or the auxiliary coil is arranged on the side wall of the side magnetic part facing the central magnetic part.
5. The sound generating apparatus according to claim 1, wherein the auxiliary coil is configured to be capable of supplying a sound signal as the auxiliary signal in synchronization with the voice coil.
6. The sound emitting apparatus of claim 1 wherein the auxiliary signal is at the same frequency as the sound signal and the auxiliary signal has a strength less than the sound signal.
7. The sound generating apparatus according to any one of claims 1 to 6, wherein a winding direction of the auxiliary coil is opposite to a winding direction of the voice coil;
Or the winding direction of the auxiliary coil is the same as the winding direction of the voice coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811314572.1A CN109379683B (en) | 2018-11-06 | 2018-11-06 | Sounding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811314572.1A CN109379683B (en) | 2018-11-06 | 2018-11-06 | Sounding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109379683A CN109379683A (en) | 2019-02-22 |
| CN109379683B true CN109379683B (en) | 2024-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811314572.1A Active CN109379683B (en) | 2018-11-06 | 2018-11-06 | Sounding device |
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| Country | Link |
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| CN (1) | CN109379683B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114257893B (en) * | 2020-09-21 | 2024-07-02 | 歌尔股份有限公司 | Sound producing device and electronic equipment |
| CN218387889U (en) * | 2022-09-02 | 2023-01-24 | 瑞声光电科技(常州)有限公司 | Loudspeaker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205610920U (en) * | 2016-02-29 | 2016-09-28 | 歌尔股份有限公司 | Moving -coil speaker structure and audio playback device |
| CN106792400A (en) * | 2017-03-16 | 2017-05-31 | 深圳精拓创新科技有限公司 | Loudspeaker and the method for reducing loudspeaker total harmonic distortion |
| CN208940230U (en) * | 2018-11-06 | 2019-06-04 | 歌尔股份有限公司 | Sounding device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204031441U (en) * | 2014-08-07 | 2014-12-17 | 北京七九七华音电子有限责任公司 | Loud speaker |
| CN205491114U (en) * | 2016-01-18 | 2016-08-17 | 瑞声光电科技(常州)有限公司 | Micro loudspeaker |
| CN105812997B (en) * | 2016-03-14 | 2019-08-02 | 青岛海信电器股份有限公司 | A kind of loudspeaker |
| CN107820169A (en) * | 2017-10-18 | 2018-03-20 | 深圳精拓创新科技有限公司 | Loudspeaker and the method for improving loudspeaker sensitivity |
-
2018
- 2018-11-06 CN CN201811314572.1A patent/CN109379683B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205610920U (en) * | 2016-02-29 | 2016-09-28 | 歌尔股份有限公司 | Moving -coil speaker structure and audio playback device |
| CN106792400A (en) * | 2017-03-16 | 2017-05-31 | 深圳精拓创新科技有限公司 | Loudspeaker and the method for reducing loudspeaker total harmonic distortion |
| CN208940230U (en) * | 2018-11-06 | 2019-06-04 | 歌尔股份有限公司 | Sounding device |
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| CN109379683A (en) | 2019-02-22 |
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