CN207835781U - A kind of loud speaker module - Google Patents
A kind of loud speaker module Download PDFInfo
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- CN207835781U CN207835781U CN201721728570.8U CN201721728570U CN207835781U CN 207835781 U CN207835781 U CN 207835781U CN 201721728570 U CN201721728570 U CN 201721728570U CN 207835781 U CN207835781 U CN 207835781U
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Abstract
The utility model embodiment provides a kind of loud speaker module.The loud speaker module includes the module shell that magnetic circuit system and vibrational system are fixed in magnetic circuit system, vibrational system and receiving；Magnetic circuit system includes the centring magnet and side magnet for being used to form magnetic gap；The magnetic conductive board when being equipped on magnet；Loud speaker module has a first end and a second end, and first end and second end is opposite；The acoustic load of first end is less than the acoustic load of second end；Positioned at the first end side while magnetic conductive board with while magnet thickness summation be less than positioned at the second end side while magnetic conductive board with while magnet thickness summation.The technical solution that the utility model embodiment provides, by adjusting the big side of acoustic load and the small side of acoustic load while magnet and while magnetic conductive board overall thickness, to reach the vibration balancing of vibrational system both sides, polarization degree caused by the acoustic load difference of both sides is effectively reduced, is enhanced product performance.
Description
Technical Field
The utility model relates to an electroacoustic technology field especially relates to a speaker module.
Background
The loudspeaker is a device capable of converting electric energy into sound energy, and is widely applied to electronic equipment such as mobile phones and computers. In the prior art, when the speaker is assembled with the terminal device, the speaker unit is usually required to be disposed in an external housing and assembled into the terminal device in a form of a module.
The shell leads to the acoustic load of different positions department in the speaker module to be different owing to the setting up of side sound outlet or leaking the hole in the speaker module, and then arouses vibration system to demonstrate polarization phenomenon, can appear the phenomenon that the voice coil loudspeaker voice coil hits magnet and send unusual noise when serious even, influences audibility and user's impression.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a loudspeaker module to reduce the different polarization degree that arouses of the acoustic load of different positions department, improve and produce property ability.
In an embodiment of the present invention, a speaker module is provided, including: the vibration generator comprises a magnetic circuit system, a vibration system and a module shell for accommodating and fixing the magnetic circuit system and the vibration system; wherein,
the magnetic circuit system comprises a center magnet and a side magnet which are used for forming a magnetic gap; an edge magnetic conducting plate is arranged on the edge magnet;
the loudspeaker module is provided with a first end and a second end, and the first end is opposite to the second end;
the acoustic load of the first end is less than the acoustic load of the second end;
the thickness sum of the side magnetic conduction plate and the side magnet which are positioned on the first end side is smaller than that of the side magnetic conduction plate and the side magnet which are positioned on the second end side.
Optionally, the thickness of the edge magnet located on the first end side is equal to or less than the thickness of the edge magnet located on the second end side.
Optionally, a side sound outlet is formed in a side wall of the module housing, and the first end is the end where the side sound outlet is located.
Optionally, the sound outlet direction of the side sound outlet hole is perpendicular to the short axis of the vibration system.
Optionally, the side sound outlet is flared.
Optionally, a positive sound outlet is formed in the module shell, and the positive sound outlet is opposite to the sound outlet part of the vibration system;
the module shell is provided with a leakage hole for communicating the inside and the outside of the module shell;
the first end is an end near the leakage hole.
Optionally, a central magnetic conductive plate is attached to the central magnet; the thickness ratio of the central magnetic conductive plate to the central magnet is equal to the thickness ratio of the edge magnetic conductive plate to the edge magnet, which is located on the second end side, and the thickness sum of the central magnetic conductive plate and the central magnet is equal to the thickness sum of the edge magnetic conductive plate to the edge magnet, which is located on the second end side.
Optionally, the central magnet is rectangular; the four sides of the central magnet are provided with the side magnets, or the two opposite sides of the central magnet, corresponding to the first end side and the second end side, are provided with the side magnets.
Optionally, the vibration system includes a diaphragm and a voice coil coupled to one side of the diaphragm; the voice coil is suspended in the magnetic gap; the pitch of the voice coil on the first end side from the center magnet is equal to or greater than the pitch of the voice coil on the second end side from the center magnet.
Optionally, the magnetic gap at the first end side is larger than the magnetic gap at the second end side.
In another embodiment of the present invention, an electronic device is further provided, which includes the speaker module described above.
In the technical scheme provided by the embodiment of the utility model, the total thickness of the side magnetic conductive plate and the side magnet on the small side of the acoustic load is reduced, so that the stress of the vibration system on the small side of the acoustic load can be reduced; alternatively, the total thickness of the side magnetic conductive plate and the side magnet on the side with the large acoustic load is increased, so that the magnitude of the stress on the vibration system on the side with the large acoustic load can be increased. By adjusting the stress of the vibration system on the large side of the acoustic load and the small side of the acoustic load, the vibration balance of the two sides of the vibration system is realized, the polarization degree caused by the difference of the acoustic loads on the two sides is effectively reduced, and the product performance is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings by those skilled in the art without creative efforts.
Fig. 1 shows a schematic structural diagram of a speaker module according to an embodiment of the present invention.
Detailed Description
In order to make the technical field person understand the scheme of the present invention better, the following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical scheme in the embodiments of the present invention.
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 shows a schematic structural diagram of a speaker module according to an embodiment of the present invention. As shown in fig. 1, the speaker module includes: a magnetic circuit system, a vibration system and a module housing 1 for accommodating and fixing the magnetic circuit system and the vibration system; wherein the magnetic circuit system comprises a center magnet 31 and a side magnet 32 for forming a magnetic gap; an edge magnetic conducting plate 33 is arranged on the edge magnet 32; the loudspeaker module is provided with a first end and a second end, and the first end is opposite to the second end; the acoustic load at the first end is less than the acoustic load at the second end; the sum of the thicknesses of the side magnetic plates 33 and the side magnets 32 at the first end side is smaller than the sum of the thicknesses of the side magnetic plates 33 and the side magnets 32 at the second end side.
For example: the thickness of the edge magnetic conductive plate 33 positioned at the first end side is a, and the thickness of the edge magnet 32 is b; the side magnetic plate 33 located at the second end side has a thickness c and the side magnet 32 has a thickness d. Wherein the sum of a and b is less than the sum of c and d.
The size of the acoustic load is also the size of the acoustic impedance, and the larger the acoustic impedance is, the larger the vibration resistance of the vibration system is; the smaller the acoustic impedance, the smaller the vibration resistance of the vibration system. In practical application, a simulation model (such as computer aided design software of the speaker module) can be used for calculating or analyzing the acoustic load condition of the speaker module; for example, the structural characteristic parameters (i.e. product design parameters) of the speaker module are used as input and input into the simulation model to calculate or analyze the acoustic load condition of the speaker module. For the simulation of a calculation model for the calculation of the acoustic load of a loudspeaker, reference is made to the prior art.
In the technical scheme provided by the embodiment of the utility model, the total thickness of the side magnetic conductive plate and the side magnet on the small side of the acoustic load is reduced, so that the stress of the vibration system on the small side of the acoustic load can be reduced; alternatively, the total thickness of the side magnetic conductive plate and the side magnet on the side with the large acoustic load is increased, so that the magnitude of the stress on the vibration system on the side with the large acoustic load can be increased. By adjusting the stress of the vibration system on the large side of the acoustic load and the small side of the acoustic load, the vibration balance of the two sides of the vibration system is realized, the polarization degree caused by the difference of the acoustic loads on the two sides is effectively reduced, and the product performance is improved.
Further, the thickness of the edge magnet 32 located on the first end side is equal to or smaller than the thickness of the edge magnet 32 located on the second end side. In specific implementation, the following scheme can be adopted to realize the following steps:
in the first embodiment, the thickness of the edge magnet 32 located on the first end side is equal to the thickness of the edge magnet 32 located on the second end side, and the thickness of the edge magnetic plate 33 located on the first end side is smaller than the thickness of the edge magnet 32 located on the second end side. Since the side magnetic conductive plate 33 has the function of correcting the magnetic force lines, and the smaller the thickness of the side magnetic conductive plate 33 is, the less the correction effect is, the smaller the stress of the vibration system at the first end side is, the smaller the stress of the vibration system at the second end side is.
In the second embodiment, the thickness of the edge magnet 32 located at the first end side is smaller than the thickness of the edge magnet 32 located at the second end side, and the thickness of the edge magnetic plate 33 located at the first end side is equal to the thickness of the edge magnetic plate 33 located at the second end side. Since the smaller the thickness of the edge magnet 32, the less the force applied to the vibration system, the smaller the force applied to the vibration system at the first end side.
In the third aspect, the thickness of the edge magnet 32 located on the first end side is smaller than the thickness of the edge magnet 32 located on the second end side, and the thickness of the edge magnetic plate 33 located on the first end side is smaller than the thickness of the edge magnetic plate 33 located on the second end side. In the third aspect, a method is adopted in which the thicknesses of the side magnet and the side magnetic conductive plate on the first end side are simultaneously reduced.
In the technical scheme provided by the embodiment of the utility model, the stress of the vibration system at the small side of the acoustic load can be reduced by reducing the thickness of the side magnetic conductive plate and/or the side magnet at the small side of the acoustic load; or the thickness of the side magnetic conduction plate and/or the side magnet on the side with the large acoustic load is adjusted to be higher, so that the stress of the vibration system on the side with the large acoustic load can be increased. By adjusting the stress of the vibration system on the large side of the acoustic load and the small side of the acoustic load, the vibration balance of the two sides of the vibration system is realized, the polarization degree caused by the difference of the acoustic loads on the two sides is effectively reduced, and the product performance is improved.
It should be noted that, on the basis that the sum of the thicknesses of the side magnetic plate 33 and the side magnet 32 located on the first end side is smaller than the sum of the thicknesses of the side magnetic plate 33 and the side magnet 32 located on the second end side, the thickness of the side magnet 32 located on the first end side may be larger than the thickness of the side magnet 32 located on the second end side. For example: when the thickness ratio of the edge magnetic plate 33 located on the first end side to the edge magnet 32 is smaller than the preset threshold, the magnetic saturation state occurs due to the thin thickness of the edge magnetic plate 33 located on the first end side, so that the increase in the thickness of the edge magnet 32 located on the first end side cannot cause the increase in the magnetic induction line density located on the first end side. That is, even if the thickness of the edge magnet 32 at the first end side is greater than the thickness of the edge magnet 32 at the second end side, the force applied to the vibration system at the first end side is smaller than that at the second end side.
Considering that the central magnet 31 has a large influence on the force applied to the vibration system, the force applied to the vibration system may be different when the voice coil in the vibration system is at different positions in the magnetic gap. If the center magnet is disposed offset from the vibration system, the voice coil on the first end side is distant from the center magnet, and the voice coil on the second end side is close to the center magnet, the force applied to the vibration system is small on the first end side, and the force applied to the vibration system is large on the second end side, so that the vibration balance is achieved.
Therefore, in practical applications, the force applied to the vibration system at the first end side can be reduced by adjusting the thickness of only the side magnets and/or the side magnetic conductive plates at the first end side, and the central magnet is not arranged in an offset manner. Alternatively, the thickness of the side magnet and/or the side magnetic conductive plate on the first end side may be reduced and the central magnet may be offset at the same time, so as to reduce the force applied to the vibration system on the first end side. It should be noted that, in practical applications, when it is difficult to completely eliminate the polarization phenomenon caused by the difference in load only by adjusting the thickness, the side magnets and/or the side magnetic conductive plates on the first end side may be reduced in thickness and the center magnet may be offset to obtain a better vibration effect. Specifically, the vibration system includes a diaphragm 21 and a voice coil 22 coupled to one side of the diaphragm 21; the voice coil 22 is suspended in the magnetic gap; the pitch of voice coil 22 on the first end side from center magnet 31 is equal to or larger than the pitch of voice coil 22 on the second end side from center magnet 31. When the distance between the voice coil 22 located at the first end side and the central magnet 31 is greater than the distance between the voice coil 22 located at the second end side and the central magnet 31, that is, the central magnet 31 is disposed to be biased toward the second end, so as to increase the distance between the voice coil 22 located at the first end side and the central magnet 31 and decrease the distance between the voice coil 22 located at the second end side and the central magnet 31.
In another embodiment, the vibration balance of the vibration system can be realized by the combination of adjusting the thickness and adjusting the size of the magnetic gap. Specifically, the magnetic gap on the first end side is larger than the magnetic gap on the second end side, and the voice coil 22 in the vibration system is located at the middle position of the magnetic gap. The larger the magnetic gap is, the more sparse the magnetic induction lines at the central position are, and the smaller the force applied to the voice coil is, so that the force applied to the voice coil at the first end side is smaller than that applied to the voice coil at the second end side. Namely, the vibration effect is further optimized by adjusting the size of the magnetic gap at both end sides on the basis of adjusting the thickness.
In practical applications, in order to improve the middle frequency characteristic or to achieve the lightness and thinness of products such as mobile phones, the speaker module is generally in a side sound emitting mode, and as shown in fig. 1, a side sound emitting hole 13 is disposed on a side wall of the module housing 1. Due to the presence of the side sound outlet holes, the acoustic loads at the positions close to the side sound outlet holes and far from the side sound outlet holes are different: the acoustic load near the side sound outlet is small and the acoustic load far from the side sound outlet is large. I.e. the first end is the end where the side sound outlet hole 13 is located. Preferably, as shown in fig. 1, the side sound outlet 13 is in a bell mouth shape to increase the sound outlet area and improve the acoustic performance.
In practical applications, a leakage hole is formed in the module housing 1 to balance the internal and external air pressures. As shown in fig. 1, since the accommodating cavity in the module housing 1 is divided into a front acoustic cavity 11 and a rear acoustic cavity 12 by the vibration system, the front acoustic cavity 11 is communicated with the side acoustic outlet 13, and in order to balance the air pressure inside the rear acoustic cavity 12 and the air pressure outside the module housing 1, a leakage hole may be opened at a position on the module housing 1 just opposite to the rear acoustic cavity 12. When the leakage hole and the side sound outlet hole are arranged at the same end of the loudspeaker module, the first end is the end where the side sound outlet hole and the leakage hole are located; when the leakage hole and the side sound outlet hole are arranged at different ends of the loudspeaker module, the structural characteristic parameters of the loudspeaker module can be input into computer aided design software of the loudspeaker module to calculate the sound load of the two ends of the loudspeaker module, wherein one end with large sound load is a second end, and the other end with small sound load is a first end.
Further, as shown in fig. 1, the sound emitting direction of the side sound emitting holes 13 is perpendicular to the short axis of the vibration system. Specifically, the vibrating diaphragm in the vibrating system is rectangular, and the short axis is the short side of the vibrating diaphragm. It should be noted that the sound output direction may also be perpendicular to the long axis of the vibration system. Those skilled in the art can select the specific situation, and the present invention is not limited to this.
In practical applications, there are positive sounding modes in addition to the side sounding mode. For example: the module shell is provided with a sound outlet hole opposite to the sound outlet part of the vibrating diaphragm. The setting of positive phonate hole can not arouse the acoustic load difference of speaker module first end and second end usually, but, if set up the hole that leaks of intercommunication module shell inside and outside on the module shell, the acoustic load that is close to leak hole department is little, and the acoustic load of keeping away from leak hole department is big. Therefore, in the present embodiment, the first end is an end close to the leakage hole.
The magnetic linkage system can be a three-magnetic-circuit system or a five-magnetic-circuit system. In the case of a three-magnetic-circuit system, the center magnet 31 has a rectangular shape, the side magnets 32 are provided on two opposite sides of the center magnet 31 corresponding to the first end side and the second end side, and a magnetic gap is formed between the center magnet 31 and the side magnets 32. In the case of a five-magnetic-circuit system, the center magnet 31 has a rectangular shape, and side magnets 32 are provided on four sides of the center magnet 31.
Further, as shown in fig. 1, a central magnetic plate 34 is attached to the central magnet 31, and the central magnetic plate is used for correcting magnetic lines.
It should be noted that the respective thicknesses and the sum of the thicknesses of the central magnetic conductive plate 34 and the central magnet 31 can be designed according to actual situations, and the present invention is not limited to this. For example: in one embodiment, as shown in fig. 1, the thickness ratio of the central magnetic plate 34 to the central magnet 31 is equal to the thickness ratio of the side magnetic plates 33 to the side magnets 32 on the second end side, and the sum of the thicknesses of the central magnetic plate 34 and the central magnet 31 is equal to the sum of the thicknesses of the side magnetic plates 33 and the side magnets 32 on the second end side.
As shown in fig. 1, the vibration system may further include a reinforcing portion 23 to enhance the vibration strength of the diaphragm 21.
In another embodiment of the present invention, there is also provided an electronic device, which includes the speaker module described above. Wherein, the speaker module includes: a magnetic circuit system, a vibration system and a module housing 1 for accommodating and fixing the magnetic circuit system and the vibration system; wherein the magnetic circuit system comprises a center magnet 31 and a side magnet 32 for forming a magnetic gap; an edge magnetic conducting plate 33 is arranged on the edge magnet 32; the loudspeaker module is provided with a first end and a second end, and the first end is opposite to the second end; the acoustic load at the first end is less than the acoustic load at the second end; the sum of the thicknesses of the side magnetic conductive plate 33 and the side magnet 32 on the first end side is smaller than the sum of the thicknesses of the side magnetic conductive plate 33 and the side magnet 32 on the second end side; the thickness of the edge magnet 32 located on the first end side is equal to or smaller than the thickness of the edge magnet 32 located on the second end side.
The electronic device may be a mobile phone, a computer, or an electronic device such as MP 3.
In the technical scheme provided by the embodiment of the utility model, the total thickness of the side magnetic conductive plate and the side magnet on the small side of the acoustic load is reduced, so that the stress of the vibration system on the small side of the acoustic load can be reduced; alternatively, the total thickness of the side magnetic conductive plate and the side magnet on the side with the large acoustic load is increased, so that the magnitude of the stress on the vibration system on the side with the large acoustic load can be increased. By adjusting the stress of the vibration system on the large side of the acoustic load and the small side of the acoustic load, the vibration balance of the two sides of the vibration system is realized, the polarization degree caused by the difference of the acoustic loads on the two sides is effectively reduced, and the product performance is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A speaker module, comprising: the vibration generator comprises a magnetic circuit system, a vibration system and a module shell for accommodating and fixing the magnetic circuit system and the vibration system; wherein,
the magnetic circuit system comprises a center magnet and a side magnet which are used for forming a magnetic gap; an edge magnetic conducting plate is arranged on the edge magnet;
the loudspeaker module is provided with a first end and a second end, and the first end is opposite to the second end;
the acoustic load of the first end is less than the acoustic load of the second end;
the thickness sum of the side magnetic conduction plate and the side magnet which are positioned on the first end side is smaller than that of the side magnetic conduction plate and the side magnet which are positioned on the second end side.
2. The speaker module as claimed in claim 1, wherein the thickness of the edge magnet at the first end side is equal to or less than the thickness of the edge magnet at the second end side.
3. The speaker module as claimed in claim 1, wherein a side sound outlet is provided on a side wall of the module housing, and the first end is an end where the side sound outlet is located.
4. A loudspeaker module as claimed in claim 3, wherein the sound outlet direction of the side sound outlet is perpendicular to the minor axis of the vibration system.
5. The speaker module as claimed in claim 1, wherein the module housing has a sound outlet opening facing the sound outlet of the vibration system;
the module shell is provided with a leakage hole for communicating the inside and the outside of the module shell;
the first end is an end near the leakage hole.
6. The loudspeaker module of any one of claims 1 to 5 wherein a central magnetic plate is provided on the central magnet;
the thickness ratio of the central magnetic conductive plate to the central magnet is equal to the thickness ratio of the edge magnetic conductive plate to the edge magnet, which is located on the second end side, and the thickness sum of the central magnetic conductive plate and the central magnet is equal to the thickness sum of the edge magnetic conductive plate to the edge magnet, which is located on the second end side.
7. The speaker module as claimed in any one of claims 1 to 5, wherein the central magnet is rectangular;
the four sides of the central magnet are provided with the side magnets, or the two opposite sides of the central magnet, corresponding to the first end side and the second end side, are provided with the side magnets.
8. The speaker module as claimed in any one of claims 1 to 5, wherein the vibration system comprises a diaphragm and a voice coil coupled to one side of the diaphragm; the voice coil is suspended in the magnetic gap;
the pitch of the voice coil on the first end side from the center magnet is equal to or greater than the pitch of the voice coil on the second end side from the center magnet.
9. The speaker module as claimed in any one of claims 1 to 5, wherein the magnetic gap at the first end side is larger than the magnetic gap at the second end side.
10. An electronic device comprising the speaker module of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721728570.8U CN207835781U (en) | 2017-12-12 | 2017-12-12 | A kind of loud speaker module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721728570.8U CN207835781U (en) | 2017-12-12 | 2017-12-12 | A kind of loud speaker module |
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| Publication Number | Publication Date |
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| CN207835781U true CN207835781U (en) | 2018-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721728570.8U Active CN207835781U (en) | 2017-12-12 | 2017-12-12 | A kind of loud speaker module |
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| Country | Link |
|---|---|
| CN (1) | CN207835781U (en) |
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2017
- 2017-12-12 CN CN201721728570.8U patent/CN207835781U/en active Active
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