CN109756828B - Sound generating device and electronic equipment - Google Patents
Sound generating device and electronic equipment Download PDFInfo
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- CN109756828B CN109756828B CN201910037378.1A CN201910037378A CN109756828B CN 109756828 B CN109756828 B CN 109756828B CN 201910037378 A CN201910037378 A CN 201910037378A CN 109756828 B CN109756828 B CN 109756828B
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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
- H04R9/02—Details
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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
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Abstract
The invention discloses a sound generating device and electronic equipment. This sound generating mechanism includes: a magnetic circuit system; the first vibration system comprises a first vibrating diaphragm and a first voice coil arranged on the first vibrating diaphragm, and the first voice coil is positioned on one side of the magnetic circuit system along the vibration direction; the first vibration system and the second vibration system vibrate and sound at the same time and sound at a sound emission hole of the electronic equipment provided with the sound generating device; and the phase difference of the frequency bands of the acoustic signals generated by the first vibration system and the second vibration system at the sound emission hole before 3kHz is between [0, pi/2 ].
Description
Technical Field
The present invention relates to the field of electroacoustic conversion technologies, and in particular, to a sound generating device and an electronic apparatus.
Background
In the existing double-sided sound production device, two sides generally have independent functions respectively. For example, one side of the sound pipe is used as a loudspeaker, the other side of the sound pipe is used as a receiver, and the sound pipe is communicated to different sound producing positions of an electronic device, such as a mobile phone, so as to produce sound outwards.
In the double-sided generation device, the acoustic performance of both sides is low, and the loudness is low. Especially for loud applications, the loudness of the loudspeakers has not been able to meet the current user requirements.
Therefore, a new technical solution is needed to solve the above technical problems.
Disclosure of Invention
One 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, a sound emitting device is provided. This sound generating mechanism includes: a magnetic circuit system; the first vibration system comprises a first diaphragm and a first voice coil arranged on the first diaphragm, and the first voice coil is positioned on one side of the magnetic circuit system along the vibration direction; the first vibration system and the second vibration system vibrate and sound at the same time and sound at a sound emission hole of the electronic equipment provided with the sound generating device; and the phase difference of the frequency bands of the acoustic signals generated by the first vibration system and the second vibration system at the sound emission hole before 3kHz is between [0, pi/2 ].
Optionally, the phase difference of the acoustic signals generated by the first vibration system and the second vibration system in the frequency band 3kHz behind the sound emission hole is between [0, pi/2 ];
or the phase difference of the sound signals generated by the first vibration system and the second vibration system in the frequency band behind 3kHz at the sound emission hole is between [ pi/2, pi ].
Optionally, the first voice coil and the second voice coil are responsive to the same electrical signal.
Optionally, the vibration directions of the first vibration system and the second vibration system are opposite.
Optionally, the sound generating device further comprises a housing, and a cavity is formed inside the housing; the magnetic circuit system is arranged in the cavity, and two sides of the magnetic circuit system along the vibration direction are spaced from the shell.
Optionally, the acoustic signal of the first vibration system is radiated from between the first diaphragm and the housing, or from between the first diaphragm and the second diaphragm;
an acoustic signal of the second vibration system is radiated from between the second diaphragm and the housing, or from between the second diaphragm and the second diaphragm.
Optionally, the sound signals generated by the first vibration system and the second vibration system are radiated to the external space through the same or separate sound outlet holes.
Optionally, a sound outlet is included, wherein the housing includes a top wall and a bottom wall opposite to the top wall, and the sound outlet is disposed on the top wall or the bottom wall.
Optionally, a first front acoustic cavity is formed between the first diaphragm and the top wall, a second front acoustic cavity is formed between the second diaphragm and the bottom wall, the casing includes a partition plate for separating the first front acoustic cavity and the second front acoustic cavity, and a through hole for communicating the first front acoustic cavity and the second front acoustic cavity is provided on the partition plate.
Optionally, the housing includes a top wall, a bottom wall, and a side wall, which are enclosed together, a first front sound cavity is formed between the first diaphragm and the top wall, a second front sound cavity is formed between the second diaphragm and the bottom wall, a first sound outlet communicated with the first front sound cavity and a second sound outlet communicated with the second front sound cavity are provided on the side wall, and the first sound outlet and the second sound outlet are arranged in parallel; or the sound signal of the first vibration system radiates from between the first diaphragm and the second diaphragm, the sound signal of the second vibration system radiates from between the second diaphragm and the first diaphragm, and the first vibration system and the second vibration system share one sound outlet hole arranged on the side wall.
Optionally, the voice coil loudspeaker comprises a shell, wherein the shell comprises a middle shell, an upper shell and a lower shell, the upper shell and the lower shell are respectively covered on two sides of the middle shell, a mounting through hole is formed in the middle shell, the magnetic circuit system is embedded in the mounting through hole, the first vibrating diaphragm is suspended at one end of the mounting through hole, the second vibrating diaphragm is suspended at the other end of the mounting through hole, and the first voice coil and the second voice coil are located in the mounting through hole.
Optionally, the difference between the effective radiation area of the first diaphragm and the effective radiation area of the second diaphragm is less than or equal to 20%.
Optionally, a sound outlet is included, wherein the phase difference of the sound signals generated by the first vibration system and the second vibration system in the sound outlet of the electronic device in the full frequency band is [0, pi/2 ].
Optionally, a sound outlet is included, wherein the phase difference of the sound signals generated by the first vibration system and the second vibration system in the sound outlet of the electronic device in the frequency band 4kHz behind is between [ pi/2, pi ].
According to another embodiment of the present disclosure, an electronic device is provided. The electronic equipment comprises a shell and the sound generating device, wherein the sound generating device is arranged in the shell, a sound emitting hole is formed in the shell, and the sound emitting hole is communicated with the sound emitting hole of the sound generating device.
Preferably, the sound generating device is in a working state, under the test condition of the baffle, the sound generating hole is tested at a position 10cm away from the sound generating hole, at the 500Hz frequency point, the loudness of the sound signal generated by at least one of the first vibration system and the second vibration system is more than or equal to 80dB, and the total loudness of the two sound signals after superposition is more than or equal to 86 dB.
Preferably, the sound signal generated by the first vibration system and the sound signal generated by the second vibration system are led out through the same or a same group of sound emitting holes arranged on the shell;
or, the shell is provided with a first sound hole or a first group of sound holes for guiding out the sound signal generated by the first vibration system, and a second sound hole or a second group of sound holes for guiding out the sound signal generated by the second vibration system, wherein the first sound hole or the first group of sound holes and the second sound hole or the second group of sound holes are located on the same surface or different surfaces of the shell.
According to one embodiment of the disclosure, the sound generating device has the characteristic of high loudness.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, 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 an exploded view of a sound emitting device according to one embodiment of the present disclosure.
Fig. 2 is a cross-sectional view of a sound emitting device according to one embodiment of the present disclosure.
Fig. 3 is an exploded view of a portion of a sound emitting device according to one embodiment of the present disclosure.
Fig. 4 is a cross-sectional view of a second sound-emitting device according to one embodiment of the present disclosure.
Fig. 5 is a cross-sectional view of a third sound emitting device according to one embodiment of the present disclosure.
Fig. 6 is a cross-sectional view of a fourth sound emitting device according to one embodiment of the present disclosure.
Fig. 7 is an exploded view of a portion of a fourth sound emitting device according to one embodiment of the present disclosure.
Fig. 8 is a frequency response curve of a sound emitting device according to one embodiment of the present disclosure.
Fig. 9 is a frequency response curve of another sound generating device according to one embodiment of the present disclosure.
Fig. 10 is an exploded view of a sound emitting device according to one embodiment of the present disclosure.
Description of reference numerals:
11: an upper shell; 12; a lower case; 13: a first diaphragm; 14: a first voice coil; 15: a central magnet; 16: a side magnet; 17: a middle shell; 18: a magnetic yoke; 19: a lower magnetic conductive plate; 20: a second voice coil; 21: a second diaphragm; 22: a second centering branch; 23: a first centering branch; 24: a first front acoustic chamber; 25: a second front acoustic chamber; 26: a first sound outlet; 27: a second sound outlet; 28: a partition plate; 29: a through hole; 30: a positive sound outlet; 31: a side sound outlet; 32: a housing; 33: a sound producing device; 34: a sound emitting hole.
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, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those 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 particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
According to one embodiment of the present disclosure, a sound generating device 33 is provided. The sound generating device 33 includes a housing, a magnetic circuit system, a first vibration system, and a second vibration system. The first vibration system and the second vibration system are respectively positioned on the upper side and the lower side of the magnetic circuit system. The two vibration systems share one magnetic circuit system to produce sound. The entirety of the sound generator 33 may be, but is not limited to, a circular configuration, a rectangular configuration, or a racetrack configuration. The following description will be given taking a rectangular structure as an example.
A cavity is formed inside the housing. For example, as shown in fig. 1, the housing includes an upper case 11, a middle case 17, and a lower case 12. The upper case 11, the middle case 17, and the lower case 12 are enclosed together to form a cavity inside them. The bottom wall is located on the lower case 12 and the side walls are located on the middle case 17. The top wall is located above the magnetic circuit system in the direction of vibration, for example on the upper case 11. The bottom wall is located below the magnetic circuit system in the vibration direction, for example, on the lower case 12. The side walls are located on the mid-shell 17. The first vibration system and the second vibration system are respectively suspended at the upper end and the lower end of the magnetic circuit system. In other embodiments, the housing of the sound generating device may be formed by a portion of the housing of the electronic device in which the sound generating device is mounted, for example, the upper case and/or the lower case may be formed by a portion of the housing of the electronic device.
The first vibration system includes a first diaphragm 13 and a first voice coil 14 provided on the first diaphragm 13. The first voice coil 14 is located on one side of the magnetic circuit system in the vibration direction, which in this embodiment is the vibration direction of the first vibration system and the second vibration system.
The second vibration system includes a second diaphragm 21 and a second voice coil 20 provided on the second diaphragm 21. The second voice coil 20 is located on the other side of the magnetic circuit system in the vibration direction. The first vibration system and the second vibration system vibrate and sound at the same time, and sound is emitted from a sound emitting hole of the electronic equipment provided with the sound generating device.
Specifically, first voice coil 14 and second voice coil 20 may respond to the same electrical signal to vibrate and emit sound simultaneously. The sound signals emitted by the first vibration system and the second vibration system radiate sound outwards through the independent sound outlet holes or the shared sound outlet holes, and are finally received by a user through the sound outlet holes in the same direction or different directions on the electronic equipment.
For example, as shown in fig. 1, the middle shell 17 is a frame structure. A mounting through hole is provided in the middle case 17. The magnetic circuit system is embedded in the mounting through hole. The first diaphragm 13 is suspended at one end of the mounting through-hole, and an edge portion of the first diaphragm 13 is bonded to one end face of the mounting through-hole by, for example, an adhesive. The second diaphragm 21 is suspended at the other end of the mounting through hole, and the edge portion of the second diaphragm 21 is bonded to the other end face of the mounting through hole by an adhesive. The first voice coil 14 and the second voice coil 20 are located in the mounting through hole.
Preferably, the difference between the effective radiation areas of the first diaphragm 13 and the second diaphragm 21 is less than or equal to 20%. The effective radiation area refers to the area of the effective vibrating portion of the diaphragm. For example, if the diaphragm is a corrugated diaphragm, the corrugated portion and the central portion effectively vibrate. For example, if the diaphragm is a flat diaphragm, the portion inside the edge portion is an effective vibration portion. When the difference between the effective radiation areas of the first diaphragm 13 and the second diaphragm 21 is within the above range, the radiation capabilities of the two diaphragms are equivalent, and the loudness superposition effect is more obvious.
For example, as shown in fig. 1-2, the sound generator 33 further includes a first stiffener 23 and a second stiffener 22. The first stiffener 23 is attached to the surface of the first diaphragm 13. The second centering support 22 is attached to a surface of the second diaphragm 21, for example, surfaces of the two diaphragms facing away from each other. The first voice coil 14 and the second voice coil 20 are electrically connected to an external circuit through the first bobbin 23 and the second bobbin 22, respectively, to receive an electrical signal.
The magnetic circuit system is arranged in the cavity, and two sides of the magnetic circuit system along the vibration direction are spaced from the shell. For example, the magnetic circuit system is spaced from the top and bottom walls. The magnetic circuit system comprises a magnetic yoke 18, a central magnetic part and an edge magnetic part, wherein the central magnetic part comprises a central magnet 15 and an upper magnetic conductive plate, the edge magnetic part comprises an edge magnet 16 and a lower magnetic conductive plate 19, a first magnetic gap and a second magnetic gap are formed among the central magnet, the edge magnet and the lower magnetic conductive plate, and the first voice coil 14 is inserted into the first magnetic gap from the upper side of the magnetic circuit system. The second voice coil 20 is inserted into the second magnetic gap from the lower side of the magnetic circuit system.
In one example, the outer diameter of first voice coil 14 is less than or equal to the inner diameter of second voice coil 20 so that first voice coil 14 can be inserted into the space surrounded by second voice coil 20 during vibration. Or
The outer diameter of the second voice coil 20 is smaller than or equal to the inner diameter of the first voice coil 14 so that the second voice coil 20 can be inserted into the space surrounded by the first voice coil 14 when vibrating.
The first voice coil 14 and the second voice coil 20 can be interleaved with each other while vibrating. In this way, on one hand, the vibrations of the two vibration systems do not interfere with each other, so that the amplitudes of the two vibration systems can be effectively improved, and the loudness of the sound generating device 33 is larger; on the other hand, the space inside the sound generating device 33 is fully utilized, and the sound generating device 33 can be made thinner.
In the embodiment of the present disclosure, the two vibration systems operate simultaneously to vibrate and generate sound, and the phase difference of the sound signals generated by the first vibration system and the second vibration system in the frequency band before 3kHz at the sound emission hole is between [0, pi/2 ]. The loudness of the sound generating device 33 in the middle and low frequency ranges at least 3kHz ahead can be effectively increased. As is well known to those skilled in the art, an acoustic signal is a periodic signal, and the interval may be extended to [0 ± 2n pi, pi/2 ± 2n pi ], where n is 0,1,2,3 … ….
Fig. 8 is a frequency response curve of the sound emitting device 33 according to one embodiment of the present disclosure. Wherein the b curve is a frequency response curve of the acoustic signal generated by the first vibration system at a distance of 10cm from the sound emission hole of the electronic device. The c-curve is the frequency response curve of the acoustic signal generated by the second vibration system at 10cm from the sound emission hole of the electronic device. The a curve is the total frequency response curve. In this example, the acoustic signals generated by the first vibration system and the second vibration system have a phase difference between [0, pi/2 ] in the whole frequency band at the sound emission hole of the electronic device, and as is well known to those skilled in the art, the acoustic signals are periodic signals, and the interval can be extended to [0 ± 2n pi, pi/2 ± 2n pi ], where n is 0,1,2,3 … …. That is, the phase difference of the frequency band before 3kHz at the sound emission hole of the acoustic signals generated by the first vibration system and the second vibration system is [0, pi/2 ], and the phase difference of the frequency band after 3kHz is also [0, pi/2 ]. As can be seen from the curve a of fig. 8, the loudness of the sound generating device 33 is significantly improved in the full frequency band.
Fig. 9 is a frequency response curve of another sound generating device 33 according to one embodiment of the present disclosure. Wherein the b curve is a frequency response curve of the acoustic signal generated by the first vibration system at a distance of 10cm from the sound emission hole of the electronic device. The c-curve is the frequency response curve of the acoustic signal generated by the second vibration system at 10cm from the sound emission hole of the electronic device. The a curve is the total frequency response curve. In this example, the phase difference of the acoustic signals generated by the first vibration system and the second vibration system in the frequency band before 3kHz at the sound emission hole is [0, pi/2 ], and as is well known to those skilled in the art, the acoustic signals are periodic signals, and the interval can be expanded to [0 ± 2n pi, pi/2 ± 2n pi ], where n is 0,1,2,3 … …. And the phase difference of the frequency band of the first vibration system and the second vibration system after 3kHz at the sound emitting hole is between [ pi/2, pi ], as known to those skilled in the art, the acoustic signal is a periodic signal, and the interval can be expanded to [0 ± 2n pi, pi/2 ± 2n pi ], where n is 0,1,2,3 … …. As can be seen from the curve a of fig. 9, the loudness of the sound generating device 33 in the middle and low frequency bands is significantly improved. In the high frequency band, the effective frequency band of the total frequency response curve is expanded due to the difference of Fh of the two vibration systems. For example, the Fh of the first vibration system is 4.1 kHz; the Fh of the second vibration system was 5.5 kHz. Superimposing the double peaks of Fh, the total effective band Fh is extended to 5.5 kHz.
The person skilled in the art can adjust the phase difference of the two vibration systems at the sound hole of the electronic device by adjusting the parameters of the vibration systems and/or the parameters of the sound outlet duct.
In one example, the sound outlet holes are provided on the side walls. For example, the sound outlet hole is opened in the middle case 17.
Alternatively, a groove is formed on the middle case 17. The upper shell 11 and/or the lower shell 12 cover the groove to form a sound outlet. For example, as shown in fig. 2-3, the partition 28 and a portion of the sidewall define two recesses. The upper case 11 and the lower case 12 are respectively fitted over the two grooves to form a first sound outlet hole 26 and a second sound outlet hole 27.
The sound emitting device 33 formed in this arrangement is a side-emitting type sound emitting device 33. The sound generating device 33 can be assembled into an electronic apparatus in the thickness direction, and conforms to the development trend of miniaturization and lightness of the electronic apparatus.
In addition, in the side-emitting sound generating apparatus 33, the distances from the first vibration system and the second vibration system to the sound outlet are equivalent, and the superposition effect of the vibrations is further improved.
In one example, the first and second vibration systems vibrate in opposite directions. That is, at the time of vibration, the first vibration system and the second vibration system simultaneously move in a direction away from each other and simultaneously move in a direction close to each other. At this time, the phases of the acoustic signals generated by the two vibration systems are opposite; after the sound signals are guided to the same direction through the sound outlet pipeline for sound emission, the two sound signals vibrate outwards at the same time or inwards at the same time, and the phases are the same at the moment, so that the loudness is further improved.
In one example, the acoustic signal of the first vibration system is radiated from between the first diaphragm 13 and the housing, or from between the first diaphragm 13 and the second diaphragm.
The acoustic signal of the second vibration system is radiated from between the second diaphragm 21 and the housing, or from between the second diaphragm 21 and the second diaphragm.
For example, as shown in fig. 2, a first sound outlet hole 26 and a second sound outlet hole 27 are provided in parallel in the side wall. The space between the first diaphragm 13 and the housing is a first front acoustic chamber 24. The first sound outlet hole 26 communicates with the first front sound chamber 24. The first sound outlet opening 26 is isolated from the second vibration system. The space between the second diaphragm 21 and the housing is a second front acoustic chamber 25. The second sound outlet hole 27 communicates with the second front sound chamber 25. The second sound outlet 27 is isolated from the first vibration system. The arrangement mode enables the sound production of the two vibration systems to be independent of each other, and interference is avoided.
For example, as shown in fig. 6, a side sound outlet hole 31 is provided in the side wall. The side sound outlet hole 31 communicates with a space between the first diaphragm 13 and the second diaphragm. The side of the first diaphragm 13 and the second diaphragm 21 close to each other is a sound emitting side. The two vibration systems share a side sound outlet hole 31. Compared with the independent sounding mode, the vibrating airflow of the two vibrating systems is more concentrated in the setting mode, and the superposition effect is better.
In this example, as shown in fig. 6 to 7, the edge portion of the first diaphragm 13 is bonded to the side edge of the upper case 11. The edge portion of the second diaphragm 21 is bonded to the side edge of the lower case 12.
It may be that the upper case 11 and the lower case 12 are closed to form two rear acoustic chambers between the upper case 11 and the first diaphragm 13 and between the lower case 12 and the second diaphragm 21. The rear acoustic chamber is used to adjust the low frequency effect of the sound generator 33. For example, the sound absorbing material may be filled in the rear sound cavity to further improve the low frequency effect of the sound generating device 33.
It is also possible that a pressure relief hole communicating with the space between the first diaphragm 13 and the top wall is provided in the upper case 11 (i.e., the top wall). A pressure relief hole communicating with the space between the second diaphragm 21 and the bottom wall is provided in the lower case 12 (i.e., the bottom wall). The pressure relief hole can balance the air pressure in front of and behind the corresponding vibrating diaphragm, so that the vibrating effect of the vibrating diaphragm is better.
In other examples, as shown in fig. 4-5, the housing includes a partition 28 for separating the first front acoustic chamber 24 and the second front acoustic chamber 25. For example, the partition plate 28 is formed on the middle case 17. A through hole 29 communicating the first front acoustic chamber 24 and the second front acoustic chamber 25 is provided in the diaphragm 28. A sound outlet hole 30 is formed in the upper case 11 or the lower case 12. The sound emitted from one of the two vibration systems, which is far from the positive sound outlet 30, is propagated to the positive sound outlet 30 via the through hole 29. The sound generating device 33 is a sound generating mode of positive sound generation, and has the characteristic of high loudness.
According to another embodiment of the present disclosure, an electronic device is provided. The electronic device may be, but is not limited to, a cell phone, a laptop, a tablet, a game console, a smart watch, a television, an intercom, and the like.
As shown in fig. 10, the electronic apparatus includes a housing 32 and the above-described sound emitting device 33. The sound generator 33 is disposed within the housing 32. The casing 32 is provided with a sound emission hole 34. The sound emitting hole 34 communicates with the sound emitting hole of the sound emitting device 33. For example, the housing 32 includes side frames. The side frame is provided with a sounding hole 34. The sound emitting device 33 is fixed inside the side frame. In this embodiment, the acoustic signal generated by the first vibration system and the acoustic signal generated by the second vibration system are derived through the same or a same set of sound emitting holes provided in the housing.
In other embodiments, a first sound hole or a first set of sound holes for guiding out the sound signal generated by the first vibration system and a second sound hole or a second set of sound holes for guiding out the sound signal generated by the second vibration system are further provided on the housing 32, wherein the first sound hole or the first set of sound holes and the second sound hole or the second set of sound holes are located on the same surface or different surfaces of the housing 32, and the first vibration system and the second vibration system can be specifically designed according to specific needs as long as the phase difference of the sound signals generated by the first vibration system and the second vibration system in the frequency band before the sound holes are 3kHz is within [0, pi/2 ].
Referring to fig. 8 and 9, when the sound generating apparatus is in a working state, under the mask test condition, the sound generating hole is located 3410cm away from the sound generating hole, and at a frequency point of 500Hz, the loudness of the sound signal generated by at least one of the first vibration system and the second vibration system is greater than or equal to 80dB, and the total loudness of the two sound signals after superposition is greater than or equal to 86 dB. For example, the loudness of the first vibration system is 86dB, the loudness of the second vibration system is 84dB, and the total loudness is raised to 91 dB.
The electronic equipment has the characteristic of good sound production effect.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present 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 (11)
1. A sound generating apparatus, comprising:
a magnetic circuit system;
the first vibration system comprises a first diaphragm and a first voice coil arranged on the first diaphragm, and the first voice coil is positioned on one side of the magnetic circuit system along the vibration direction; and
the second vibration system comprises a second vibrating diaphragm and a second voice coil arranged on the second vibrating diaphragm, the second voice coil is positioned on the other side of the magnetic circuit system along the vibration direction, and the first vibration system and the second vibration system vibrate and sound at the same time and sound at a sound emission hole of the electronic equipment provided with the sound generating device;
the phase difference of the frequency bands of the sound signals generated by the first vibration system and the second vibration system at the sound emission hole before 3kHz is between [0, pi/2 ],
wherein the vibration directions of the first vibration system and the second vibration system are opposite, the difference between the effective radiation area of the first diaphragm and the effective radiation area of the second diaphragm is less than or equal to 20 percent,
the sound generating device further comprises a shell, and a cavity is formed inside the shell;
the magnetic circuit system is arranged in the cavity, two sides of the magnetic circuit system along the vibration direction are spaced from the shell,
the shell comprises a top wall, a bottom wall and a side wall which are enclosed together, a first front sound cavity is formed between the first vibrating diaphragm and the top wall, a second front sound cavity is formed between the second vibrating diaphragm and the bottom wall, a first sound outlet communicated with the first front sound cavity and a second sound outlet communicated with the second front sound cavity are formed in the side wall, and the first sound outlet and the second sound outlet are arranged in parallel; or,
the sound signal of the first vibration system radiates from between the first vibrating diaphragm and the second vibrating diaphragm, the sound signal of the second vibration system radiates from between the second vibrating diaphragm and the first vibrating diaphragm, the first vibration system and the second vibration system share one sound outlet hole formed in the side wall, wherein the shell comprises an upper shell and a lower shell, the edge part of the first vibrating diaphragm is bonded on the side edge of the upper shell, the edge part of the second vibrating diaphragm is bonded on the side edge of the lower shell, and the upper shell and the lower shell are closed so as to form two rear sound cavities between the upper shell and the first vibrating diaphragm and between the lower shell and the second vibrating diaphragm.
2. The sound generating apparatus according to claim 1, wherein the phase difference of the sound signals generated by the first vibration system and the second vibration system at the sound emission hole in a frequency band after 3kHz is between [0, pi/2 ];
or the phase difference of the sound signals generated by the first vibration system and the second vibration system in the frequency band behind 3kHz at the sound emission hole is between [ pi/2, pi ].
3. The sound generating apparatus of claim 1, wherein the first and second voice coils are responsive to the same electrical signal.
4. The sound generating apparatus according to claim 1, wherein the acoustic signal of the first vibration system is radiated from between the first diaphragm and the housing or from between the first diaphragm and the second diaphragm;
an acoustic signal of the second vibration system is radiated from between the second diaphragm and the housing, or from between the second diaphragm and the first diaphragm.
5. The sound generating apparatus according to claim 1, wherein the sound signals generated by the first vibration system and the second vibration system are radiated to an external space through the same or separate sound outlet holes.
6. The sound generating apparatus according to claim 1, comprising a sound outlet, wherein the housing includes a top wall and a bottom wall opposite to the top wall, the sound outlet being provided on the top wall or the bottom wall.
7. The sound generating apparatus according to claim 6, wherein a first front sound chamber is formed between the first diaphragm and the top wall, a second front sound chamber is formed between the second diaphragm and the bottom wall, the housing includes a partition plate for partitioning the first front sound chamber and the second front sound chamber, and a through hole communicating the first front sound chamber and the second front sound chamber is provided in the partition plate.
8. The sound generating apparatus according to any one of claims 1 to 7, comprising a housing, wherein the housing comprises a middle shell and an upper shell and a lower shell respectively covering both sides of the middle shell, a mounting through hole is provided in the middle shell, the magnetic circuit system is embedded in the mounting through hole, the first diaphragm is suspended at one end of the mounting through hole, the second diaphragm is suspended at the other end of the mounting through hole, and the first voice coil and the second voice coil are located in the mounting through hole.
9. An electronic device comprising a housing and a sound generating device according to any one of claims 1 to 8, wherein the sound generating device is disposed in the housing, and a sound emitting hole is disposed in the housing, and the sound emitting hole communicates with a sound emitting hole of the sound generating device.
10. The electronic device of claim 9, wherein the sound generating device is operated and tested at a position 10cm away from the sound emitting hole under the mask test condition, and at 500Hz, the loudness of the sound signal generated by at least one of the first vibration system and the second vibration system is greater than or equal to 80dB, and the total loudness of the two sound signals after superposition is greater than or equal to 86 dB.
11. The electronic device of claim 9, wherein the acoustic signal generated by the first vibration system and the acoustic signal generated by the second vibration system are derived through the same or a same set of sound emission holes provided on the housing;
or, the shell is provided with a first sound hole or a first group of sound holes for guiding out the sound signal generated by the first vibration system, and a second sound hole or a second group of sound holes for guiding out the sound signal generated by the second vibration system, wherein the first sound hole or the first group of sound holes and the second sound hole or the second group of sound holes are located on the same surface or different surfaces of the shell.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910037378.1A CN109756828B (en) | 2019-01-15 | 2019-01-15 | Sound generating device and electronic equipment |
| PCT/CN2019/128433 WO2020147541A1 (en) | 2019-01-15 | 2019-12-25 | Sound production apparatus and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910037378.1A CN109756828B (en) | 2019-01-15 | 2019-01-15 | Sound generating device and electronic equipment |
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| Publication Number | Publication Date |
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| CN109756828A CN109756828A (en) | 2019-05-14 |
| CN109756828B true CN109756828B (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910037378.1A Active CN109756828B (en) | 2019-01-15 | 2019-01-15 | Sound generating device and electronic equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109756828B (en) |
| WO (1) | WO2020147541A1 (en) |
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| CN109756828B (en) * | 2019-01-15 | 2021-02-19 | 歌尔股份有限公司 | Sound generating device and electronic equipment |
| CN114189791B (en) * | 2019-03-14 | 2023-11-17 | 歌尔股份有限公司 | Double-sided sound generating device and electronic equipment |
| CN110881160B (en) * | 2019-11-12 | 2021-08-31 | 歌尔股份有限公司 | Sound production device |
| CN110972038A (en) * | 2019-12-31 | 2020-04-07 | 歌尔科技有限公司 | Sound production device |
| CN111327999B (en) * | 2020-03-05 | 2021-02-19 | 瑞声科技(新加坡)有限公司 | Loudspeaker box |
| CN211744718U (en) * | 2020-03-05 | 2020-10-23 | 瑞声科技(新加坡)有限公司 | Sound production device |
| CN111193985B (en) * | 2020-03-13 | 2021-06-01 | Oppo广东移动通信有限公司 | Mobile terminal |
| CN111526462B (en) * | 2020-05-29 | 2021-08-17 | Oppo广东移动通信有限公司 | Electroacoustic module, electronic equipment and audio output method |
| CN111757219B (en) * | 2020-06-29 | 2021-08-27 | 歌尔股份有限公司 | Sound production device and head-mounted electronic apparatus |
| CN112533112B (en) * | 2020-12-25 | 2022-03-04 | 瑞声新能源发展(常州)有限公司科教城分公司 | Double-magnetic circuit structure and sound production device |
| CN112839284B (en) * | 2020-12-31 | 2023-01-20 | 歌尔股份有限公司 | Sound production monomer and earphone |
| CN113099362B (en) * | 2021-03-31 | 2022-07-22 | 歌尔股份有限公司 | Sound producing device |
| TWI751069B (en) * | 2021-04-08 | 2021-12-21 | 富祐鴻科技股份有限公司 | Double-sided vibrating speaker |
| CN114268889B (en) * | 2021-12-14 | 2024-07-30 | 歌尔科技有限公司 | Speaker and electronic device |
| CN114449420B (en) * | 2022-01-30 | 2024-07-30 | 歌尔科技有限公司 | Speaker and electronic device |
| CN114866925A (en) * | 2022-05-31 | 2022-08-05 | 歌尔股份有限公司 | Sound generating device and sound generating equipment |
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Also Published As
| Publication number | Publication date |
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| CN109756828A (en) | 2019-05-14 |
| WO2020147541A1 (en) | 2020-07-23 |
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