CN204442667U - Speak loud speaker module in side - Google Patents

Abstract

The utility model provides a side sound loudspeaker module, which comprises a loudspeaker unit, a module housing for accommodating and fixing the loudspeaker unit, and a side sound hole provided on the side wall of the module housing, and the loudspeaker unit includes a diaphragm; The module casing includes the module upper casing; the space formed between the diaphragm, the module upper casing and the side sound outlet is the front sound cavity sound channel; wherein, the front sound cavity sound channel corresponds to the position of the module upper shell. A leak hole communicating with the outside. Utilizing the above-mentioned side sounding speaker module of the utility model can effectively reduce the peak sensitivity of the high-frequency cutoff frequency and improve the distortion of the speaker (corresponding to the synchronous attenuation of the THD peak at the high-frequency cutoff frequency), thereby making it more convenient for subsequent audio adjustments, Achieve higher sound quality.

Description

Side sound speaker module

technical field

The utility model relates to the technical field of loudspeakers, in particular to a side-emitting sound loudspeaker module.

Background technique

For the side sound speaker module, the sound produced by the single speaker passes through the front sound cavity and the side sound channel, and then radiates from the side sound hole to the outside of the side sound speaker module. Resonant structure, when the speaker unit is sounding, the front cavity and the side sound channel resonate, so that the part of the frequency response curve corresponding to the front cavity produces a resonance peak, thereby affecting the sensitivity of the frequency response curve corresponding to the part of the front cavity, especially the high frequency of the front cavity Near the cutoff frequency, the sensitivity is high and the range of change is large, which affects the sound quality of the product and is not conducive to further adjustment and optimization of sound effects.

At present, mainly by adding sound-absorbing materials or damping mesh to the front acoustic cavity, the resonance peak of the frequency response curve corresponding to the front acoustic cavity is lowered. When the resonance peak is lowered, the sensitivity in the frequency band will also be lowered as a whole, especially near the low-frequency cut-off frequency. Will be greatly affected, so that the performance of the product will be greatly lost.

Utility model content

In view of the above problems, the purpose of this utility model is to provide a side sound speaker module to improve the adverse effect of the resonance generated by the front sound chamber and the side sound channel on product performance.

The side sound loudspeaker module provided by the utility model includes a loudspeaker unit, a module housing for accommodating and fixing the loudspeaker unit, and a side sound hole provided on the side wall of the module housing, and the loudspeaker unit includes a diaphragm; The group shell includes the upper shell of the module; the space formed between the diaphragm, the upper shell of the module and the side sound hole is the sound channel of the front acoustic cavity; wherein, the upper shell of the module corresponds to the sound channel of the front acoustic cavity The position is provided with a leakage hole communicating with the outside.

In addition, a preferred structure is that an avoidance structure is provided around the corresponding leakage hole on the upper shell of the module.

In addition, the preferred structure is that the avoidance structure is a groove, and the depth of the groove is less than the thickness of the upper shell of the module.

Furthermore, the preferred structure is that a damping net having the same shape as the avoidance structure is bonded above the avoidance structure.

In addition, the preferred structure is that the damping net is bonded above the avoidance structure.

In addition, the preferred structure is that the side sound speaker module also includes a module lower case arranged under the speaker unit, the module lower case is fastened to the bottom of the side wall of the module upper case, and the diaphragm and the module The space formed between the shell and the lower shell of the module is the rear acoustic cavity.

In addition, the preferred structure is that the contact part of the module upper shell and the module lower shell and the contact part of the speaker unit and the module upper shell are sealed by means of ultrasonic welding, glue coating or crimping.

In addition, the preferred structure is to open a side sound hole on the side wall of the upper case of the module.

Furthermore, the preferred structure is that the loudspeaker unit also includes a voice coil connected to the lower side of the diaphragm, a center magnet, a center washer connected above the center magnet, side magnets arranged on both sides of the center magnet, and a side magnet connected to the side magnet. The upper side washer; wherein, the gap between the central magnet and the central washer forms a magnetic gap, and the voice coil is arranged in the magnetic gap.

Utilize above-mentioned side sound loudspeaker module of the utility model, by opening leak hole on the sound channel of front sound cavity, weaken the resonance of front sound cavity, thereby effectively reduce the resonance peak of frequency response curve corresponding front sound cavity part, improve the distortion of loudspeaker ( Corresponding to the THD peak synchronous attenuation at the high frequency cutoff frequency), which makes it easier for subsequent audio adjustments and achieves higher sound quality effects.

Description of drawings

By referring to the following description combined with the accompanying drawings and the content of the claims, and with a more comprehensive understanding of the utility model, other objectives and results of the utility model will be more clear and easy to understand. In the attached picture:

FIG. 1 is a schematic diagram of the overall structure of a side sound speaker module according to Embodiment 1 of the present invention;

Fig. 2 is a sectional view along line A-A of Fig. 1;

Fig. 3 is a schematic diagram of the overall structure of a side sound speaker module according to Embodiment 2 of the present invention;

Fig. 4 is the sectional view of Fig. 3 along line B-B;

Fig. 5 is a comparison diagram of frequency response curves according to an embodiment of the present invention;

FIG. 6 is a comparison diagram of harmonic distortion curves according to an embodiment of the present invention.

The reference signs include: speaker unit 1, module upper case 2, module lower case 3, side sound hole 4, front sound cavity 5, rear sound cavity 6, leakage hole 7, avoidance structure 8, damping net 9 and Fixed rib 10.

The same reference numerals indicate similar or corresponding features or functions throughout the drawings.

Detailed ways

Specific embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings.

Embodiment one

Fig. 1 and Fig. 2 respectively show the overall structure of the side sound speaker module according to Embodiment 1 of the present invention.

As shown in Fig. 1 and Fig. 2, the side sound speaker module provided by the first embodiment includes a speaker unit 1 and a module casing for accommodating and fixing the speaker unit 1; wherein, the speaker unit 1 includes a diaphragm ( Not shown in the figure), the voice coil (not shown in the figure) combined with the lower side of the diaphragm, the center magnet (not shown in the figure), the center washer (not shown in the figure) combined on the center magnet, set in the center The side magnets (not shown) on both sides of the magnet and the side washer (not shown) combined above the side magnets; wherein, the gap between the center magnet and the center washer forms a magnetic gap, and the voice coil is arranged on the magnetic in the gap.

The module casing includes a module upper casing 2 and a module lower casing 3. The module upper casing 2 is a bottomless cavity formed by four side walls and a top wall. The fixing rib 10 is used to fix the loudspeaker unit 1, the diaphragm, the fixing rib 10 and the top wall of the module upper case 2 form a space, which is used as the front acoustic cavity 5 on a side wall of the module upper case 2 There is a side sound hole 4, and the front sound cavity 5 is connected with the side sound hole 4 to form a front sound cavity sound channel, and the sound generated by the vibration of the speaker unit is transmitted from the side sound hole 4 to the side sound output channel The outside of the acoustic speaker module; the bottom of the four side walls of the module upper case 2 is provided with a groove formed by removing material, and the module lower case 3 is arranged below the speaker unit 1, and passes through the side of the module upper case 2 The groove at the bottom of the wall is fastened together with the module upper case 2, and the diaphragm, the fixing rib 10, the four side walls of the module upper case 2 and the module lower case 3 form another space, which serves as the rear acoustic cavity 6 .

Since the rear acoustic cavity 6 of the side sound speaker module needs to be sealed, that is to say, the position where the module upper shell 2 and the module lower shell 3 are combined needs to be sealed, and the position where the module upper shell 2 is combined with the speaker unit 1 also needs to be sealed. Sealing, in a specific embodiment of the present utility model, the position where the module upper case 2 is combined with the module lower case 3 and the position where the module upper case 2 is combined with the speaker unit 1 can be welded or glued or pressed Sealed in the same way to form a sealed rear acoustic cavity.

In order to weaken the resonance of the sound channel of the front acoustic cavity, a leakage hole 7 is opened at the position of the sound output channel of the front acoustic cavity relative to the upper shell 2 of the module. The number and position of the leakage holes 7 can be adjusted according to actual needs, but the position of the leakage hole 7 It can only be installed in the sound channel of the front cavity, and the resonance of the sound channel of the front cavity can be weakened by opening the leak hole 7 in the sound channel of the front cavity, and the Q value of the resonance peak of the frequency response curve in the sound channel of the front cavity can be effectively reduced (the value of quality factor), it can also improve the high-frequency cutoff frequency of the frequency response curve to a certain extent, increase the effective bandwidth of the product, and improve the distortion of the speaker. The distortion is manifested in the peak of the high-frequency cutoff frequency corresponding to the THD curve. Utilizing the utility model can effectively reduce the peak of the high-frequency cut-off frequency on the THD curve.

When assembling the product, in order to prevent the opened leakage hole 7 from being blocked by other parts of the product, such as mobile phone casings and the like, an avoidance structure 8 is provided on the outer side of the top wall of the module upper case 2 at the position corresponding to the leakage hole 7. In a specific embodiment of the present invention, the avoidance structure is a groove, and the depth of the groove is smaller than the thickness of the top wall of the upper shell 2 of the module. The avoidance structure 8 is not limited to the shape shown in Figure 1, and can be set according to different products. for different shapes.

Embodiment two

Fig. 3 and Fig. 4 respectively show the overall structure of the side-firing speaker module according to the second embodiment of the present invention.

As shown in Figure 3 and Figure 4, the side sound speaker module provided by the second embodiment includes a speaker unit 1, a module upper shell 2 for accommodating and fixing the speaker unit 1, and a Module lower shell 3; Wherein, loudspeaker unit 1 comprises diaphragm (not shown in figure), is combined in the voice coil (not shown in figure) of vibrating film underside, center magnet (not shown in figure), is combined in the center The center washer (not shown) above the magnet, the side magnets (not shown) arranged on both sides of the center magnet and the side washer (not shown) combined on the top of the side magnet; wherein, the center magnet and The gap between the center washers forms a magnetic gap, and the voice coil is set in the magnetic gap.

The module upper case 2 is a bottomless cavity formed by four side walls and a top wall. A fixing rib 10 extending downward is provided on the top of the module upper case 2 for fixing the speaker unit 1, diaphragm, The space formed by the fixing ribs 10 and the top wall of the module upper shell is the front acoustic cavity 5, and a side sound hole 4 is opened on a side wall of the module upper shell 2, and the front sound cavity 5 communicates with the side sound hole 4. The sound channel of the front sound cavity is formed, and the sound generated by the vibration of the speaker unit is transmitted from the side sound hole 4 to the outside of the side sound speaker module through the sound output channel of the front sound cavity; the bottom of the four side walls of the module upper shell 2 is provided with The groove formed by removing the material, the module lower shell 3 is arranged under the speaker unit 1, and is fastened together with the module upper shell 2 through the groove at the bottom of the side wall of the module upper shell 2, and the diaphragm, fixed The space formed by the ribs 10 , the four side walls of the module upper case 2 and the module lower case 3 is the rear acoustic cavity 6 .

In addition, because the rear acoustic cavity 6 of the side sound speaker module needs to be sealed, that is to say, the position where the module upper shell 2 and the module lower shell 3 are combined needs to be sealed, and the position where the module upper shell 2 is combined with the speaker unit 1 Sealing is also required. In a specific embodiment of the present invention, the position where the module upper case 2 is combined with the module lower case 3 and the position where the module upper case 2 is combined with the speaker unit 1 can be welded or glued or crimping to form a sealed rear acoustic cavity.

Similarly, in order to weaken the resonance of the sound channel of the front acoustic cavity, a leakage hole 7 is opened at the position of the sound output channel of the front acoustic cavity relative to the upper shell 2 of the module. The number and position of the leakage holes 7 can be set according to actual needs, but the leakage The position of the hole 7 can only be set in the sound channel of the front cavity. By opening the leak hole 7 in the sound channel of the front cavity, the resonance of the sound channel of the front cavity can be weakened, and the frequency response curve can effectively reduce the resonance of the sound channel of the front cavity. The Q value of the peak (the value of the quality factor) can also increase the high-frequency cutoff frequency of the frequency response curve to a certain extent, and increase the effective bandwidth of the product.

When assembling the product, in order to prevent the opened leakage hole 7 from being blocked by other parts of the product, such as mobile phone casings and the like, an avoidance structure 8 is provided on the outer side of the top wall of the module upper case 2 at the position corresponding to the leakage hole 7. In a specific embodiment of the present invention, the avoidance structure is a groove, and the depth of the groove is smaller than the thickness of the top wall of the upper shell 2 of the module. The avoidance structure 8 is not limited to the shape shown in FIG. 3 , and can be designed according to the needs of actual products. into different shapes.

The difference between embodiment two and embodiment one is that in embodiment two, a damping net 9 is laid on the top of the avoidance structure 8, and the shape of the damping net 9 is the same as that of the avoidance structure 8, and the damping net 9 can be more effectively reduced by laying the damping net 9. The peak of the harmonic distortion curve due to the resonance of the vocal channel of the front cavity. Embodiment 2 is a variant form of Embodiment 1. The damping net laid in Embodiment 2 plays an auxiliary role in changing the distortion of the loudspeaker. hole, thereby reducing the distortion of the speaker, specifically choose the speaker module with the damping net (the side sound speaker module provided in the second embodiment) or the speaker module without the damping net (the side sound speaker module provided in the first embodiment) module) depends on the actual situation of the product.

The above two embodiments respectively illustrate the structure of the side sound speaker module. By opening a leak hole in the sound output channel of the front sound cavity, the resonance of the sound output channel of the front sound cavity is weakened, and the performance of the side sound speaker module is improved. The two main factors for the performance of side-firing speaker modules are SPL (sound pressure level, indicating the sensitivity of a certain frequency) and THD (harmonic distortion).

Fig. 5 shows the change of the frequency response curve before and after opening the leakage hole.

As shown in Figure 5, the abscissa in Figure 5 represents the frequency, and the ordinate represents the sound pressure level. The blue curve is the frequency response curve before the leak hole is opened, and the red curve is the frequency response curve after the leak hole is opened. In Figure 5, the first A peak value (sound pressure level between 90dB-100dB) corresponds to the low-frequency cutoff frequency (frequency is 1000Hz). It can be seen that after opening the leakage hole, the influence on the sensitivity of the low-frequency cutoff frequency is minimal, while the second The first peak (sound pressure level between 110dB-120dB) corresponds to the high frequency cutoff frequency (frequency is 5000Hz). After opening the leakage hole, the sensitivity of the high frequency cutoff frequency is significantly reduced.

Fig. 6 shows the change of the harmonic distortion curve before and after opening the leakage hole.

As shown in Figure 6, in Figure 6, the abscissa represents the frequency, and the ordinate represents the distortion value (the larger the value, the greater the distortion), the blue curve is the distortion curve before opening the leak hole, and the red curve is the distortion after opening the leak hole Curve, in conjunction with Figure 5, the abscissa corresponding to the high-frequency cutoff frequency in Figure 5 is 5000Hz, and the abscissa corresponding to the high-frequency cutoff frequency in Figure 6 is 5000Hz, and the ordinate corresponding to the abscissa 5000Hz in Figure 6 is Distortion value, it is obvious that the distortion value after the leak hole is opened is smaller than the distortion value before the leak hole is opened.

The above content has explained in detail that the side sound speaker module provided by the utility model can reduce the sensitivity peak value of the high frequency cutoff frequency effectively by opening a leakage hole in the sound output channel of the front acoustic cavity, thereby weakening the resonance of the sound output channel of the front acoustic cavity. Improve the distortion of the speaker (corresponding to the synchronous attenuation of the THD peak at the high-frequency cut-off frequency), which makes it easier to adjust the subsequent audio and achieve higher sound quality.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Anyone familiar with the technical field can easily think of changes or changes within the technical scope disclosed by the utility model Replacement should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (9)

1. A side sound loudspeaker module, comprising a loudspeaker monomer, a module housing for accommodating and fixing the loudspeaker monomer, and a side sound hole provided on the side wall of the module housing, the loudspeaker monomer Including a diaphragm; the module housing includes a module upper case; the space formed between the diaphragm, the module upper case and the side sound hole is the sound channel of the front acoustic cavity, which is characterized in that: A leakage hole communicating with the outside is opened on the upper shell of the module at a position corresponding to the sound outlet channel of the front acoustic chamber. 2. The side-firing speaker module as claimed in claim 1, characterized in that, A avoidance structure is provided around the upper shell of the module corresponding to the leakage hole. 3. The side emitting sound speaker module as claimed in claim 2, wherein: The avoidance structure is a groove, and the depth of the groove is smaller than the thickness of the upper shell of the module. 4. The side emitting sound speaker module as claimed in claim 3, characterized in that, A damping net having the same shape as the avoidance structure is bonded above the avoidance structure. 5. The side-emitting sound speaker module as claimed in claim 4, characterized in that, The damping net is bonded above the avoidance structure. 6. The side-firing speaker module as claimed in claim 1, characterized in that, It also includes a module lower case arranged under the speaker unit, the module lower case is fastened to the bottom of the side wall of the module upper case, the diaphragm, the module upper case and the module The space formed between the lower shells of the above-mentioned modules is the rear acoustic cavity. 7. The side-firing speaker module as claimed in claim 6, characterized in that, The part where the module upper case contacts the module lower case and the part where the loudspeaker unit contacts the module upper case is sealed by means of ultrasonic welding, glue coating or crimping. 8. The side-firing speaker module as claimed in claim 1, wherein: The side sound hole is provided on the side wall of the module upper case. 9. The side-firing speaker module as claimed in claim 1, wherein: The loudspeaker unit also includes a voice coil combined with the lower side of the diaphragm, a center magnet, a center washer combined above the center magnet, side magnets arranged on both sides of the center magnet, and a center magnet combined with the A side washer above the side magnet; wherein, the gap between the center magnet and the center washer forms a magnetic gap, and the voice coil is arranged in the magnetic gap.