Patent ID: 12238476

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENT

The present disclosure will hereinafter be described in detail with reference to an exemplary embodiment. To make the technical problems to be solved, technical solutions and beneficial effects of the present disclosure more apparent, the present disclosure is described in further detail together with the figures and the embodiment. It should be understood the specific embodiment described hereby is only to explain the disclosure, not intended to limit the disclosure.

Referring toFIGS.1-9, a speaker module100is provided for a mobile terminal (not shown) provided with a sound output port (not shown). The speaker module100includes a speaker box1. The speaker box1includes a sound output opening11for the side surface to generate sound. The speaker module100further includes a horn barrel2connected to the sound output opening11, horn barrel2is hollow and openings are arranged at both ends, the horn barrel2is connected to the side surface of the speaker box1and connected with the sound output opening11, and the other end of the horn barrel2is used to connect to the sound output port of the mobile terminal. Along the sound output direction of the horn barrel2, the sectional area of the horn barrel2is gradually changing. By designing the variable sectional surface on the horn barrel2as a variable sectional surface with different areas or lengths and widths, the size of the variable sectional surface is directly related to the sound quality of each part of the horn barrel2. The impeder of each part of the horn barrel2is fully coupled, so as to achieve small volume multi-level resonance and widen the frequency band range. At the same time, it is small in size and flexibly avoids space to adapt to the chassis of different mobile terminals.

Optionally, the mobile terminal may be a mobile phone, a computer, a tablet, or the like. By adapting the speaker module100into the mobile terminal, and assembling the speaker box1and the mobile terminal through the horn barrel2, it is convenient to improve the acoustic performance of the mobile terminal.

In this embodiment, the horn barrel2includes a top surface and a bottom surface spaced along the thickness direction of the speaker box1, and two side surfaces respectively connecting the bottom surface and the top surface. The bottom surface and/or the top surface are curved.

Wherein, the speaker in the speaker box1includes a diaphragm. In the speaker box1where the side surface emits sound, the vibration direction of the diaphragm is the thickness direction of the speaker box1. The top surface and the bottom surface of the horn barrel2are arranged at intervals in the thickness direction, and the two side surfaces are respectively connected to the bottom surface and the top surface. The sectional surface of the horn barrel2in the sound output direction achieves a gradually changing effect, realizes multi-level resonance, and broadens the frequency band range.

In this embodiment, the horn barrel2includes a first section21connecting the sound output opening11, a second section22that is bent and extended from the first section21to the end away from the speaker box1and is spaced from the speaker box and a third section23formed by an end of the second section22extending away from the first section. The third section23is for connecting to the mobile terminal's sound output port. The bottom surfaces corresponding to the first section21and the second section22are both plane4. The top surface of the first section21is the first arc surface5. The top surface corresponding to the second section22is the second arc surface6. The bottom surface and the top surface corresponding to the third section23are the third arc surface7and the fourth arc surface10, respectively. The radians of the first arc surface5, the second arc surface6, the third arc surface7and the fourth arc surface10are different.

Specifically, the sound output opening11set on the sound output side of the speaker box1is connected to the horn barrel2to transmit the sound emitted by the speaker box1, thereby improving the acoustic performance of the speaker box1. Since the horn barrel2includes first section21, second section22and third section23. By designing the variable sectional surface on the horn barrel2as a variable sectional surface with different areas or lengths and widths, the size of the variable sectional surface is directly related to the sound quality of each part of the horn barrel2. The impeder of each part of the horn barrel2is fully coupled, so as to achieve small volume multi-level resonance and widen the frequency band range.

In this embodiment, the bending radius of the connection between the first section21and the second section22is greater than 4 times the minimum wavelength. As shown inFIGS.10-11, simulations show that excellent acoustic transmission performance can be achieved when the bending radius exceeds 4 times the minimum wavelength.

Preferably, the sound output directions of the first section21and the third section23are bent at900through the second section22, so that the volume of the horn barrel is small. It is designed according to the sectional surface of the curved path, it can be adapted to the chassis of the mobile terminal, and the avoidance effect is good.

In this embodiment, the inner diameter of the connection between the first section21and the second section22is smaller than half wavelength. When the radius of the horn barrel2is smaller than the half wavelength, the high-frequency sound waves are reversed through the bend, resulting in a sound cut-off phenomenon. If the horn barrel2adopts a bending size smaller than half wavelength, it will improve its high frequency cutoff and widen the bandwidth. Based on the transmission line model, the vertical direction of the horn barrel2is designed as a variable sectional surface with different areas or lengths and widths for stakeout. The variable sectional surface is directly related to the sound quality of each part of the horn barrel, and the impedance of each part of the horn barrel is fully coupled to achieve multi-level resonance.

In this embodiment, the speaker box1is rectangular, and the sound output opening11is set at the short axis edge of the speaker box.

Specifically, after adding the chassis hole of the mobile terminal, the frequency response curve of the symmetrical horn barrel2produces a very deep valley value at 11.5 khz. As shown inFIG.12, a sound pressure node appears in the direction of the speaker horizontal axis at this frequency, resulting in a pit valley in the sound output. The sound output port in the vertical axis direction is increased, the sound pressure intensity on both sides of the horizontal axis is changed, the 11.5 khz valley value is improved, and the acoustic performance is good.

In this embodiment, a plurality of the horn barrel2are included. The first sections of the horn barrels2are arranged side by side along the width direction of the speaker box1. The second sections22of the plurality of the horn barrels2are arranged alternately and stacked along the thickness direction of the speaker box1. The third sections23of the horn barrels2are arranged side by side along the length direction of the speaker box1. Optionally, the multiple horn barrels2are 2, 3, 4, etc., which are selected according to actual needs.

Specifically, using the speaker to divide the horn barrel2into multiple layers, the width of the single-layer horn barrel2is controlled to be smaller than the half wavelength. The cutoff frequency of the horn barrel2is increased to achieve smooth sound transmission and improve high frequency performance. By changing the sectional surfaces of the first section21and the second section22of the two horn barrels2gradually, the resonance peaks of each horn barrel2are coupled to improve the high frequency performance. At the same time, the volume and space requirements can be reduced, the lengths of multiple first sections21and second sections22can be extended, and the number of resonance frequencies can be increased. Multi-level resonance is controlled by multiple horn barrel2parts to achieve high frequency boost effect of multiple frequencies.

Preferably, when there are three horn barrels2, the three horn barrels2are arranged side by side or cross each other. It is also possible that two horn barrels2are placed side by side, and one horn barrel2overlaps with one of the two horn barrels2or is arranged between the two horn barrels2. Multi-level resonance is controlled by multiple horn barrel2parts to achieve high frequency boost effect of multiple frequencies.

In this embodiment, the second section22and/or the third section23are filled with sound absorbing material. Increase the damping of the horn barrel2by filling the sound absorbing material, compensate the symmetrical horn barrel2response curve, and improve the high frequency performance.

Specifically, as shown inFIG.13, the SPL curve of ORI is compared with the SPL curve of ORI+internal impedance 1100 pa*s/m+ expansion space in the figure, horn barrel2from the sound output side of the speaker horizontal axis to the sound output opening11of the device generates a pit valley at a high frequency position. Use a small chamber to fill the attenuation material to increase the pipe damping and smooth the high frequency SPL curve. By increasing the local volume and changing the acoustic capacitor, the resonant frequency point can be controlled.

In this embodiment, the first section21includes the first opening211, a first opening212connected to one end of the second section22, and a first side wall213and a second side wall214formed by the first opening211extending to the first opening212. Both ends of the first opening211gradually decrease and extend toward the direction of the first opening212to form the first arc surface5. The sound output opening11transmits the sound of the speaker box1to the first opening212transmitted through the first opening211. Both ends of the first opening211gradually decrease and extend toward the direction of the first opening212to form the first arc surface5. The bottom surface of the first section21is plane4, and the top surface is first arc surface5. The sectional surface of the first section21of the horn barrel2is gradually changed in shape, which improves the sound quality of the horn barrel2.

Wherein, the pen of one end of the horn barrel is the first opening211, and the first opening211is the opening9of the horn barrel, which is used for connecting with the sound output opening11.

In this embodiment, the length of the first opening211is greater than the length of the first opening212, and the width of the first opening211is smaller than the width of the first opening212, is convenient to gather the sound output by the sound output opening11, and the sound quality is good.

In this embodiment, the second section22includes a third opening221matched with the first opening212, a fourth opening222connected with one end of the third section23, a side wall223and a fourth side wall224formed by bending and extending from the third opening221to the fourth opening222. The third opening221is used to transmit the sound output by the first opening212to the fourth opening222, through the fourth opening222. The sectional surface structures of the first section21and the second section22are different. Meanwhile, the thicknesses of the first opening211, the first opening212and the fourth opening222are gradually increased. The sound can be multi-level resonance, widening the frequency band range.

In this embodiment, the thickness of the third opening221is the same as the thickness of the first opening212.

In this embodiment, the sectional surface of the fourth side wall224parallel to the thickness direction of the speaker box1is a semicircular structure. Easy to manufacture.

In this embodiment, the third side wall223and the fourth side wall224are vertically arranged, which is convenient to bend the second section22and save installation space.

In this embodiment, the third section23includes a fifth opening231, a fifth opening231that cooperates with the fourth opening222, a side wall233and t sixth side wall234extending away from the fourth opening222from the fifth opening231, a sixth opening232connected between the fifth side wall233and the sixth side wall. The first side wall213, the third side wall223and the fifth side wall233together form the avoidance position3. Can be adapted to a variety of chassis.

Wherein, the opening at the other end of the horn barrel is the sixth opening232, and the sixth opening232is the waiting port of the horn10.

In this embodiment, the third section23protrudes to both sides parallel to the thickness direction of the speaker box1to form the third arc surface7and the fourth arc surface respectively.

In this embodiment, as shown inFIG.14, the sensitivity of the sounding module of conventional side2at the same frequency is lower than those of these: multi-level horn plus sound port matching module 1; initial version level2horn3; initial version level2horn plus sound absorbing material4; multi-level horn with variable sectional surface5; multi-level horn with variable sectional surface plus the sound absorbing material6and positive vocalization of large rear cavity module 7. Therefore, it can be seen from the above test results that, compared with the sounding module of conventional side2, various solutions with a horn barrel have a higher frequency band. Wherein, the bandwidth and frequency response floating of multi-level horn matching plus sound output hole matching model 1 are higher than other schemes.

Compared with the related art, the speaker module of the present invention is used for a mobile terminal provided with a sound output port, and the speaker module includes a speaker box. The speaker box includes a sound output opening for side surface sound. The speaker module also includes a horn barrel connected to the sound output opening. The horn barrel is hollow in the middle and openings are arranged at both ends. The horn barrel is connected to the side surface of the speaker box and connected with the sound output opening, and the other end of the horn barrel is used to connect to the sound output port of the mobile terminal.

Along the sound output direction of the horn barrel, the sectional area of the horn barrel gradually changes; the horn barrel is designed as a variable sectional surface with different areas or lengths and widths for stakeout, the size of the variable sectional surface is directly related to the sound quality of each part of the horn barrel. The impeders of each part of the horn barrel are fully coupled to achieve multi-level resonance in a small volume and widen the frequency band range. At the same time, it is small in size and flexibly avoids space to adapt to the chassis of different mobile terminals.

It is to be understood, however, that even though numerous characteristics and advantages of the present exemplary embodiment have been set forth in the foregoing description, together with details of the structures and functions of the embodiment, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms where the appended claims are expressed.