CN207835781U - A kind of loud speaker module - Google Patents

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

A kind of loud speaker module

Technical field

The utility model is related to electroacoustic techniques field more particularly to a kind of loud speaker modules.

Background technology

Loud speaker is a kind of device that can convert electrical energy into acoustic energy, is widely used in the electronics such as mobile phone, computer and sets In standby.In the prior art, loud speaker and terminal device group timing, it usually needs loudspeaker monomer is placed in external shell, with The form of module is assembled in terminal device.

Shell is caused in loud speaker module at different location due to the setting that side goes out acoustic aperture or leak holes in loud speaker module Acoustic load it is different, and then vibrational system is caused to show polarization phenomena, voice coil is even will appear when serious beats and touch magnet and send out The phenomenon that abnormal noise, influences sense of hearing and user's impression.

Utility model content

The utility model embodiment provides a kind of loud speaker module, is caused with reducing the acoustic load difference at different location Polarization degree, enhance product performance.

In one embodiment of the utility model, a kind of loud speaker module is provided, including：Magnetic circuit system, vibrational system With the module shell of the receiving fixed magnetic circuit system and the vibrational system；Wherein,

The magnetic circuit system includes the centring magnet and side magnet for being used to form magnetic gap；It is described while on magnet equipped with while lead Magnetic sheet；

The loud speaker module has a first end and a second end, and the first end and the second end are opposite；

The acoustic load of the first end is less than the acoustic load of the second end；

Positioned at first end side it is described while magnetic conductive board with it is described while magnet thickness summation be less than be located at described second End side it is described while magnetic conductive board with it is described while magnet thickness summation.

Optionally, the thickness for being located at the side magnet of first end side is equal to or less than positioned at second end side The thickness of the side magnet.

Optionally, it is provided with side on the side wall of the module shell and goes out acoustic aperture, the first end goes out acoustic aperture institute for the side One end.

Optionally, the side goes out the short axle for going out sound direction perpendicular to the vibrational system of acoustic aperture.

Optionally, it is in bell mouth shape that the side, which goes out acoustic aperture,.

Optionally, the part that goes out of vibrational system described in face offers and just goes out acoustic aperture on the module shell；

The leak holes for being connected to the module shell inside and outside are offered on the module shell；

The first end is close to one end of the leak holes.

Optionally, being sticked on the centring magnet has center magnetic conductive board；The center magnetic conductive board and the centring magnet Thickness than equal to positioned at second end side it is described while magnetic conductive board with it is described while magnet thickness ratio, and the center magnetic conductive board With the thickness summation of the centring magnet be equal to positioned at second end side it is described while magnetic conductive board with it is described while magnet thickness Summation.

Optionally, the centring magnet is rectangle；The magnet or described when being equipped with described of the four of the centring magnet Correspondence first end side of centring magnet and two relative edges of second end side are equipped with the side magnet.

Optionally, the vibrational system includes vibrating diaphragm and is incorporated into the voice coil of the vibrating diaphragm side；The voice coil is hung on In the magnetic gap；The voice coil positioned at first end side is equal to or more than away from the spacing of the centring magnet positioned at described The voice coil of second end side is away from the spacing of the centring magnet.

Optionally, the magnetic gap of first end side is more than the magnetic gap of second end side.

In another embodiment of the utility model, a kind of electronic equipment, including above-mentioned loud speaker mould are additionally provided Group.

The utility model embodiment provide technical solution in, by by the small side of acoustic load while magnetic conductive board and while magnet Overall thickness turn down, the stress size of the vibrational system of the small side of acoustic load can be reduced；Alternatively, by the way that the side of the big side of acoustic load is led The overall thickness of magnetic sheet and side magnet is turned up, it is possible to increase the stress size of the vibrational system of the big side of acoustic load.By adjusting acoustic load The stress size of the vibrational system of big side and the small side of acoustic load, realizes the vibration balancing of vibrational system both sides, effectively reduces both sides Polarization degree, enhances product performance caused by acoustic load difference.

Description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is Some embodiments of the utility model, for those of ordinary skill in the art without creative efforts, Other drawings may also be obtained based on these drawings.

Fig. 1 shows the structural schematic diagram for the loud speaker module that one embodiment of the utility model provides.

Specific implementation mode

In order to make those skilled in the art more fully understand the utility model, below in conjunction with the utility model reality The attached drawing in example is applied, the technical scheme in the utility model embodiment is clearly and completely described.

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those skilled in the art are obtained without making creative work The every other embodiment obtained, shall fall within the protection scope of the present invention.

Fig. 1 shows the structural schematic diagram for the loud speaker module that one embodiment of the utility model provides.As shown in Figure 1, should Loud speaker module includes：The module shell 1 of magnetic circuit system, vibrational system and receiving fixed magnetic circuit system and vibrational system；Wherein, Magnetic circuit system includes the centring magnet 31 and side magnet 32 for being used to form magnetic gap；The magnetic conductive board 33 when being equipped on magnet 32；It raises Sound device module has a first end and a second end, and first end and second end is opposite；The sound that the acoustic load of first end is less than second end is negative It carries；Positioned at the first end side while magnetic conductive board 33 with while magnet 32 thickness summation be less than side magnetic conductive board 33 positioned at the second end side with The thickness summation of side magnet 32.

Such as：The thickness in magnetic conductive board 33 positioned at the first end side be a, while magnet 32 thickness be b；Positioned at the second end side The thickness in magnetic conductive board 33 be c, while magnet 32 thickness be d.Wherein, a and b's and less than c and d's and.

Wherein, acoustic load size that is to say acoustic impedance size, and acoustic impedance is bigger, and the vibration resistance of vibrational system is bigger；Sound Impedance is smaller, and the vibration resistance of vibrational system is with regard to smaller.In practical applications, simulation model can be used (such as loud speaker module Computer aided design software) calculate or analyze the acoustic load situation of loud speaker module；For example, by the structure of loud speaker module Characteristic parameter (i.e. product design parameter) is input in simulation model as input to calculate or analyze the sound of loud speaker module Loading condition.Wherein, it can be found in the prior art for simulating the computation model of calculating loud speaker acoustic load.

The utility model embodiment provide technical solution in, by by the small side of acoustic load while magnetic conductive board and while magnet Overall thickness turn down, the stress size of the vibrational system of the small side of acoustic load can be reduced；Alternatively, by the way that the side of the big side of acoustic load is led The overall thickness of magnetic sheet and side magnet is turned up, it is possible to increase the stress size of the vibrational system of the big side of acoustic load.By adjusting acoustic load The stress size of the vibrational system of big side and the small side of acoustic load, realizes the vibration balancing of vibrational system both sides, effectively reduces both sides Polarization degree, enhances product performance caused by acoustic load difference.

Further, the thickness in magnet 32 for being located at the first end side is equal to or less than the while magnet 32 for being located at the second end side Thickness.In the specific implementation, following scheme can be used to realize：

Scheme one, positioned at the first end side the thickness in magnet 32 be equal to positioned at the second end side while magnet 32 thickness, Positioned at the first end side the thickness in magnetic conductive board 33 be less than positioned at the second end side while magnet 32 thickness.Due to side magnetic conductive board 33 have the function of correcting the magnetic line of force, and magnetic conductive board 33 thickness in side is smaller, and correction effect gets over unobvious, therefore, are located at first The vibrational system stress size of end side can be less than the vibrational system stress size positioned at the second end side.

Scheme two, positioned at the first end side the thickness in magnet 32 be less than positioned at the second end side while magnet 32 thickness, Positioned at the first end side the thickness in magnetic conductive board 33 be equal to positioned at the second end side while magnetic conductive board 33 thickness.Due to side magnet 32 Thickness it is smaller, will be smaller to the active force of vibrational system, therefore, be located at the first end side vibrational system stress size meeting Less than the vibrational system stress size positioned at the second end side.

Scheme three, positioned at the first end side the thickness in magnet 32 be less than positioned at the second end side while magnet 32 thickness, Positioned at the first end side the thickness in magnetic conductive board 33 be less than positioned at the second end side while magnetic conductive board 33 thickness.In scheme three, Take at the same reduce the first end side while magnet and while magnetic conductive board thickness method.

The utility model embodiment provide technical solution in, by by the small side of acoustic load while magnetic conductive board and/or while The thickness of magnet is turned down, and the stress size of the vibrational system of the small side of acoustic load can be reduced；Alternatively, by by the side of the big side of acoustic load The thickness of magnetic conductive board and/or side magnet is turned up, it is possible to increase the stress size of the vibrational system of the big side of acoustic load.It is negative by adjusting sound The stress size of the vibrational system of big side and the small side of acoustic load is carried, the vibration balancing of vibrational system both sides is realized, effectively reduces by two Polarization degree caused by the acoustic load difference of side, enhances product performance.

It should be noted that positioned at the first end side while magnetic conductive board 33 with while magnet 32 thickness summation be less than and be located at second End side while magnetic conductive board 33 with while magnet 32 thickness summation basis under, the thickness of side magnet 32 for being located at the first end side also may be used More than the thickness of the side magnet 32 positioned at the second end side.Such as：When positioned at the first end side while magnetic conductive board 33 with while magnet 32 When thickness ratio is less than predetermined threshold value, due to the very thin thickness of the side magnetic conductive board 33 positioned at the first end side, there is magnetically saturated state, So as to cause the magnetic strength line density that can not cause positioned at the increase of the thickness of the side magnet 32 of the first end side positioned at the first end side Increase.Even if that is, positioned at the first end side the thickness in magnet 32 be more than positioned at the second end side while magnet 32 thickness Degree, the stress that vibrational system is located at the first end side still can be less than the stress for being located at the second end side.

In view of centring magnet 31 is larger to the stressing influence of vibrational system, when the voice coil in vibrational system is in magnetic gap Different location at when, the stress of vibrational system can be different.It is arranged assuming that centring magnet is biased relative to vibrational system, first end For the voice coil of side far from centring magnet, the voice coil of the second end side is close to centring magnet, then small in the stress of the first end side vibrational system, It is big in the stress meeting of the second end side vibrational system, to reach vibration balancing.

Therefore, in practical applications, can be used only adjust the first end side while magnet and/or while magnetic conductive board thickness side Formula reduces the stress size of the vibrational system of the first end side, and centring magnet does not bias setting.Alternatively, can be simultaneously by first end Side while magnet and/or while magnetic conductive board thickness reduce and by centring magnet bias be arranged, to reduce the vibration of the first end side The stress size of system.It should be noted that in practical applications, when the mode only with adjustment thickness is difficult to completely eliminate Caused by load is different when polarization phenomena, can be used simultaneously by the first end side while magnet and/or while magnetic conductive board thickness reduction And by the mode of centring magnet biasing setting to obtain better vibrating effect.Specifically, vibrational system includes 21 He of vibrating diaphragm It is incorporated into the voice coil 22 of 21 side of vibrating diaphragm；Voice coil 22 is hung in magnetic gap；Voice coil 22 positioned at the first end side is away from centring magnet 31 spacing is equal to or more than the voice coil 22 positioned at the second end side away from the spacing of centring magnet 31.When the sound positioned at the first end side It encloses 22 spacing away from centring magnet 31 and is more than the voice coil 22 positioned at the second end side away from the spacing of centring magnet 31, that is to say center Magnet 31 is biased to second end setting, to increase the spacing of voice coil 22 and centring magnet 31 positioned at the first end side, reduces positioned at the The spacing of the voice coil 22 and centring magnet 31 of two end sides.

In another embodiment, the mode that can be combined by adjusting thickness and adjustment magnetic gap size realizes vibration system The vibration balancing of system.Specifically, the magnetic gap of the first end side is more than the magnetic gap of the second end side, the voice coil 22 in vibrational system In the centre position of magnetic gap.Magnetic gap is bigger, and the magnetic induction line of center position is more sparse, and voice coil stress is smaller, therefore, is located at The voice coil stress size of first end side is less than the voice coil stress size of the second end side.I.e. on the basis of adjusting thickness, pass through tune The magnetic gap size of whole two end side advanced optimizes vibrating effect.

In practical applications, in order to promote intermediate frequency characteristics or in order to realize the lightening of the products such as mobile phone, loud speaker module Generally side goes out sound pattern, as shown in Figure 1, being provided with side on the side wall of module shell 1 goes out acoustic aperture 13.Since side goes out depositing for acoustic aperture , cause by nearside speak hole and far from side speak hole location acoustic load it is different：It is small by the nearside acoustic load at hole of speaking, Far from side speak hole location acoustic load it is big.Namely first end is that side goes out one end where acoustic aperture 13.Preferably, such as Fig. 1 institutes Show, it is in bell mouth shape that side, which goes out acoustic aperture 13, to increase area of speaking, improves acoustical behavior.

In practical applications, can leak holes can be set on module shell 1 to balance inner and outer air pressure.As shown in Figure 1, by The preceding operatic tunes 11 and the rear operatic tunes 12 are separated by vibrational system in the host cavity in module shell 1, the preceding operatic tunes 11 goes out acoustic aperture 13 with side Connection, for the air pressure inside the operatic tunes 12 after balancing and the air pressure outside module shell 1, can on module shell 1 sound after face Leak holes are opened up at the position of chamber 12.When leak holes and side go out the same end that acoustic aperture is opened in loud speaker module, then first end is Side goes out one end where acoustic aperture and leak holes；When leak holes and side, which go out acoustic aperture, is opened in the different ends of loud speaker module, at this moment The structural characteristic parameter of loud speaker module can be input in the computer aided design software of loud speaker module and calculate loud speaker The acoustic load size at module both ends, the big one end of acoustic load are second end, and the small one end of acoustic load is first end.

Further, as shown in Figure 1, side goes out the short axle for going out sound direction perpendicular to vibrational system of acoustic aperture 13.Specifically, it shakes Vibrating diaphragm in dynamic system is rectangle, and short axle is the short side of vibrating diaphragm.It also can be perpendicular to vibration system it should be noted that going out sound direction The long axis of system.Those skilled in the art can select according to actual conditions, and the utility model is not especially limited this.

In practical applications, other than side goes out sound pattern, also just go out sound pattern.Such as：Face vibrating diaphragm on module shell The part that goes out offer and just go out acoustic aperture.The sound of loud speaker module first end and second end will not usually be caused by just going out the setting of acoustic aperture Load is different, still, if when offering the leak holes of connection module shell inside and outside on module shell, at leak holes Acoustic load is small, big far from the acoustic load at leak holes.Therefore, in the present embodiment, first end is close to one end of leak holes.

Above-mentioned magnetic linkage system can be three magnetic circuit systems or five magnetic circuit systems.When for three magnetic circuit systems, centring magnet 31 be rectangle, and the first end side of correspondence of centring magnet 31 and two relative edges of the second end side are equipped with side magnet 32, centring magnet 31 Magnetic gap is formed between side magnet 32.When for five magnetic circuit systems, centring magnet 31 is rectangle, four sides of centring magnet 31 It is respectively equipped with side magnet 32.

Further, as shown in Figure 1, being sticked on centring magnet 31 has center magnetic conductive board 34, center magnetic conductive board acts on In the amendment magnetic line of force.

It should be noted that center magnetic conductive board 34 can be according to reality with 31 respective thickness of centring magnet and thickness summation Situation is designed, and the utility model is not especially limited this.Such as：In the specific implementation, as shown in Figure 1, center magnetic conduction The thickness of plate 34 and centring magnet 31 than equal to positioned at the second end side while magnetic conductive board 33 with while magnet 32 thickness ratio, and center The thickness summation of magnetic conductive board 34 and centring magnet 31 be equal to positioned at the second end side while magnetic conductive board 33 with while magnet 32 thickness it is total With.

As shown in Figure 1, vibrational system may also include reinforcement part 23, to enhance the oscillation intensity of vibrating diaphragm 21.

In the another embodiment of the utility model, a kind of electronic equipment is additionally provided, which includes above-mentioned Loud speaker module.Wherein, loud speaker module includes：Magnetic circuit system, vibrational system and the fixed magnetic circuit system of receiving and vibrational system Module shell 1；Wherein, magnetic circuit system includes the centring magnet 31 and side magnet 32 for being used to form magnetic gap；On side magnet 32 Equipped with side magnetic conductive board 33；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 Less than the acoustic load of second end；Positioned at the first end side while magnetic conductive board 33 with while magnet 32 thickness summation be less than and be located at second end Side while magnetic conductive board 33 with while magnet 32 thickness summation；It is equal to or less than positioned at the thickness of the side magnet 32 of the first end side and is located at The thickness of the side magnet 32 of second end side.

It should be noted that above-mentioned electronic equipment can be the electronic equipments such as mobile phone, computer or MP3.

The utility model embodiment provide technical solution in, by by the small side of acoustic load while magnetic conductive board and while magnet Overall thickness turn down, the stress size of the vibrational system of the small side of acoustic load can be reduced；Alternatively, by the way that the side of the big side of acoustic load is led The overall thickness of magnetic sheet and side magnet is turned up, it is possible to increase the stress size of the vibrational system of the big side of acoustic load.By adjusting acoustic load The stress size of the vibrational system of big side and the small side of acoustic load, realizes the vibration balancing of vibrational system both sides, effectively reduces both sides Polarization degree, enhances product performance caused by acoustic load difference.

Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations； Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that： It still can be with technical scheme described in the above embodiments is modified, or is carried out to which part technical characteristic etc. With replacement；And these modifications or replacements, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution The spirit and scope of scheme.

Claims (10)

1. a kind of loud speaker module, which is characterized in that including：Magnetic circuit system, vibrational system and the fixed magnetic circuit system of receiving With the module shell of the vibrational system；Wherein,

The magnetic circuit system includes the centring magnet and side magnet for being used to form magnetic gap；The magnetic conduction when being equipped on magnet Plate；

The loud speaker module has a first end and a second end, and the first end and the second end are opposite；

The acoustic load of the first end is less than the acoustic load of the second end；

Positioned at first end side it is described while magnetic conductive board with it is described while magnet thickness summation be less than be located at second end side It is described while magnetic conductive board with it is described while magnet thickness summation.

2. loud speaker module according to claim 1, which is characterized in that be located at the side magnet of first end side Thickness is equal to or less than the thickness of the side magnet positioned at second end side.

3. loud speaker module according to claim 1, which is characterized in that be provided with side on the side wall of the module shell and go out Acoustic aperture, the first end are that the side goes out one end where acoustic aperture.

4. loud speaker module according to claim 3, which is characterized in that the side went out acoustic aperture goes out sound direction perpendicular to institute State the short axle of vibrational system.

5. loud speaker module according to claim 1, which is characterized in that vibrational system described in face on the module shell The part that goes out offer and just go out acoustic aperture；

The leak holes for being connected to the module shell inside and outside are offered on the module shell；

The first end is close to one end of the leak holes.

6. loud speaker module according to any one of claim 1 to 5, which is characterized in that the centring magnet is equipped with Center magnetic conductive board；

The thickness of the center magnetic conductive board and the centring magnet than equal to positioned at second end side the side magnetic conductive board with The thickness ratio of the side magnet, and the thickness summation of the center magnetic conductive board and the centring magnet is equal to positioned at the second end Side it is described while magnetic conductive board with it is described while magnet thickness summation.

7. loud speaker module according to any one of claim 1 to 5, which is characterized in that the centring magnet is rectangle；

The correspondence of magnet or the centring magnet when being equipped with described of the four of the centring magnet first end side and institute Two relative edges for stating the second end side are equipped with the side magnet.

8. loud speaker module according to any one of claim 1 to 5, which is characterized in that the vibrational system includes shaking Film and the voice coil for being incorporated into the vibrating diaphragm side；The voice coil is hung in the magnetic gap；

The voice coil positioned at first end side is equal to or more than away from the spacing of the centring magnet positioned at second end side Spacing of the voice coil away from the centring magnet.

9. loud speaker module according to any one of claim 1 to 5, which is characterized in that first end side it is described Magnetic gap is more than the magnetic gap of second end side.

10. a kind of electronic equipment, which is characterized in that including any loud speaker modules of claim 1-9.