Speaker module

Abstract

The present invention provides a speaker module for a mobile terminal provided with a sound outlet, the speaker module comprising a speaker box, the speaker box comprising a first sound output opening and a second sound output opening, the speaker module further comprising a first horn and a second horn; one end of the first horn is connected to the side of the speaker box and communicates with the first sound output opening, the other end of the first horn is used to connect to the sound outlet of the mobile terminal; one end of the second horn is connected to the side of the speaker box and communicates with the second sound output opening, the other end of the second horn is used to connect to the sound outlet of the mobile terminal; the first horn and the second horn are asymmetrically arranged with respect to the speaker box. The speaker module in the present invention realizes multi-order coupling of resonance peaks, which not only improves high-frequency performance, but also broadens the frequency band range, and at the same time, reduces manufacturing costs.

Description

[Technical field]

[0001] The invention belongs to the technical field of sound-to-electricity conversion, and in particular relates to a speaker module. [Background technology]

[0002] In order to better play sound, mobile terminals such as mobile phones, tablets and game consoles generally add a horn between the internal speaker box and the sound outlet of the mobile terminal. The speaker box and the horn can be combined into a speaker module.

[0003] Existing speaker modules improve acoustic performance by:

[0004] 1. Add an attenuation cavity to the front cavity of the speaker and fill it with sound-absorbing materials to improve the resonance peak, and lengthen the pipe of the horn to improve the number and width of the front cavity resonance peak. Although this method can improve the acoustic performance to a certain extent, the filling of sound-absorbing materials increases the manufacturing cost, and its high-frequency radiation ability is weak and the bandwidth is insufficient.

[0005] 2. The attenuation cavity and the horn are distinguished by means of baffles. Although this method can improve the acoustic performance and increase the space utilization to a certain extent, it has few resonance peaks and cannot improve the high-frequency performance.

[0006] It can be seen from the above description that the existing speaker module not only has a high manufacturing cost, but also has low high-frequency performance and insufficient frequency band range. Therefore, it is necessary to provide a new speaker module to solve these problems. [Summary of the invention]

[0007] The technical problem to be solved by the present invention is how to provide a speaker module to solve the problem that the existing speaker module not only has high manufacturing cost but also has low high-frequency performance and insufficient frequency band range.

[0008] The present invention is implemented as follows: a speaker module is provided for a mobile terminal provided with a sound outlet, the speaker module includes a speaker box, the speaker box includes a first sound output opening and a second sound output opening for side sound emission, the first sound output opening and the second sound output opening are respectively arranged on two opposite sides of the speaker box; the speaker module also includes a first horn and a second horn, both of which are hollow and open at both ends; one end of the first horn is connected to the side of the speaker box and communicated with the first sound output opening, and the other end of the first horn is used to connect to the sound outlet of the mobile terminal; one end of the second horn is connected to the side of the speaker box and communicated with the second sound output opening, and the other end of the second horn is used to connect to the sound outlet of the mobile terminal; the first horn and the second horn are asymmetrically arranged with respect to the speaker box.

[0009] Furthermore, the first horn includes a plurality of horns; the second horn includes a plurality of horns.

[0010] Furthermore, the first horn includes a first section connected to the first sound output opening, a second section bent and extended from one end of the first section away from the speaker box and spaced from the speaker box, and a third section extended from one end of the second section away from the first section, and the third section is used to connect to the sound outlet of the mobile terminal.

[0011] Furthermore, the second horn includes a fourth section connected to the second sound output opening and bent, and a fifth section extending from one end of the fourth section away from the speaker box and spaced from the speaker box, the fifth section being used to connect to the sound outlet of the mobile terminal.

[0012] Furthermore, along the sound emitting direction of the first horn, the cross-sectional area of ​​the third section gradually increases; along the sound emitting direction of the second horn, the cross-sectional area of ​​the fifth section gradually increases.

[0013] Furthermore, the number of resonance peaks of the first horn is proportional to its length.

[0014] Furthermore, the speaker box is rectangular, the first sound output opening and the second sound output opening are respectively arranged on two short axis sides of the speaker box, and the third section of the first horn and the fifth section of the second horn both extend beyond the plane where the long axis side of the speaker box is located.

[0015] Furthermore, the first horn includes multiple first sections of multiple first horns, which are arranged side by side along the short axis direction of the speaker box, multiple second sections of multiple first horns are staggered and stacked along the thickness direction of the speaker box, and multiple third sections of multiple first horns are arranged side by side along the long axis direction of the speaker box.

[0016] Furthermore, the second horn includes multiple, multiple fourth sections of the multiple second horns are arranged side by side along the short axis direction of the speaker box, multiple fourth sections of the multiple second horns are arranged in staggered layers along the thickness direction of the speaker box, and multiple fifth sections of the multiple second horns are arranged side by side along the long axis direction of the speaker box.

[0017] Furthermore, the second section and / or the third section and / or the fifth section are filled with sound absorbing material.

[0018] Compared with the prior art, the speaker module in the present invention complements the frequency response peaks and valleys by utilizing the first horn and the second horn of different lengths, sizes, volumes and shapes, thereby realizing multi-order coupling of resonance peaks, which not only improves the high-frequency performance but also broadens the frequency band range. At the same time, since there is no need to fill sound-absorbing materials, the manufacturing cost of the speaker module is also reduced.

Brief Description of the Drawings

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a schematic diagram of a three-dimensional structure of a speaker module provided by an embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of the structural decomposition of a speaker module provided by an embodiment of the present invention;

[0022] Figure 3 is a sound power curve diagram of a first horn and a second horn in a loudspeaker module provided by an embodiment of the present invention;

[0023] Figure 4 is a schematic diagram of acoustic performance test results of a speaker module provided by an embodiment of the present invention;

[0024] Figure 5 It is a sound pressure level (SPL) curve diagram of a speaker module provided by an embodiment of the present invention.

[0025] Among them: 100, speaker module; 1, speaker box; 11, first sound output opening; 12, second sound output opening; 2, first horn; 21, first section; 22, second section; 23, third section; 3, second horn; 31, fourth section; 32, fifth section. [Specific implementation method]

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] The embodiment of the present invention provides a speaker module 100, Figure 1 and Figure 2As shown, for a mobile terminal provided with a sound outlet, a speaker module 100 includes a speaker box 1, the speaker box 1 includes a first sound output opening 11 and a second sound output opening 12 for side sound emission, and the first sound output opening 11 and the second sound output opening 12 are respectively arranged on two opposite sides of the speaker box 4; the speaker module 100 also includes a first horn 2 and a second horn 3, both of which are hollow and open at both ends; one end of the first horn 2 is connected to the side of the speaker box 1 and communicated with the first sound output opening 11, and the other end of the first horn 2 is used to connect to the sound outlet of the mobile terminal; one end of the second horn 3 is connected to the side of the speaker box 1 and communicated with the second sound output opening 12, and the other end of the second horn 3 is used to connect to the sound outlet of the mobile terminal; the first horn 2 and the second horn 3 are asymmetrically arranged with respect to the speaker box 1.

[0028] The first horn 2 and the second horn 3 are asymmetrically arranged with respect to the speaker box 1 , which means that the first horn 2 and the second horn 3 are different in length, size, volume and shape.

[0029] In this embodiment, there is one first horn 2 and one second horn 3. Of course, according to actual needs, there can be multiple first horns 2 and multiple second horns 3, such as two, three, four, five, etc.

[0030] In this embodiment, the speaker box 1 is rectangular, and the first sound output opening 11 and the second sound output opening 12 are respectively arranged on two short axis sides of the speaker box 1. Of course, the speaker box 1 can also be designed into other shapes according to actual needs.

[0031] In this embodiment, the number of resonance peaks of the first horn 2 is proportional to its length. This design can improve the loudness of the intermediate frequency (1k-8kHz).

[0032] In this embodiment, the first horn 2 includes a first section 21 connected to the first sound output opening 11, a second section 22 bent and extended from one end of the first section 21 away from the speaker box 1 and spaced from the speaker box 1, and a third section 23 formed by extending from one end of the second section 22 away from the first section 21, and the third section 23 is used to connect to the sound outlet of the mobile terminal.

[0033] In this embodiment, the first section 21 is bent 90 degrees along the first direction, and the second section 22 is bent 180 degrees in the opposite direction of the first direction. This arrangement can increase the length of the first horn 2 under the premise of the same space, thereby improving the space utilization rate.

[0034] The first direction is the sound output direction of the first sound output opening 11 .

[0035] In this embodiment, along the sound emitting direction of the first horn 2 , the cross-sectional area of ​​the third section 23 gradually increases.

[0036] In this embodiment, the second horn 3 includes a fourth section 31 connected to the second sound output opening 12 and bent, and a fifth section 32 bent and extended from one end of the fourth section 31 away from the speaker box 1 and spaced from the speaker box 1, and the fifth section 32 is used to connect to the sound outlet of the mobile terminal. By designing the second horn 3 into only two sections, the occupied space of the speaker module 100 can be reduced to a certain extent.

[0037] In this embodiment, along the sound emitting direction of the second horn 3 , the cross-sectional area of ​​the fifth section 32 gradually increases.

[0038] In this embodiment, the third section 23 of the first horn 2 and the fifth section 42 of the second horn 4 both extend beyond the plane where the long axis of the speaker box 1 is located.

[0039] As another embodiment of the first horn 2, the first horn 2 includes multiple first sections 21 of the multiple first horns 2 are arranged side by side along the short axis direction of the speaker box 1, multiple second sections 22 of the multiple first horns 2 are staggered and stacked along the thickness direction of the speaker box 1, and multiple third sections 23 of the multiple first horns 2 are arranged side by side along the long axis direction of the speaker box 1.

[0040] As another embodiment of the second horn 3, the second horn 3 comprises multiple, multiple fourth sections 31 of the multiple second horns 3 are arranged side by side along the short axis direction of the speaker box 1 close to the speaker box 1, multiple fourth sections 31 of the multiple second horns 3 are arranged in staggered layers along the thickness direction of the speaker box 1, and multiple fifth sections 32 of the multiple second horns 3 are arranged side by side along the long axis direction of the speaker box 1.

[0041] As a specific embodiment of the first horn 2 and the second horn 3, there are two first horns 2 and two second horns 3. Of course, according to actual needs, there can be three, four, five first horns 2 and three, four, five second horns 3.

[0042] Compared with the prior art, the speaker module 100 in this embodiment complements the frequency response peaks and valleys by utilizing the first horn 2 and the second horn 3 of different lengths, sizes, volumes and shapes, thereby realizing multi-order coupling of resonance peaks, which not only improves the high-frequency performance but also broadens the frequency band range. At the same time, since there is no need to fill sound-absorbing materials, the manufacturing cost of the speaker module 100 is also reduced.

[0043] In addition, the speaker module 100 in this embodiment is also flexibly designed and can be adapted to an asymmetric housing in a mobile terminal to avoid a specified position in the structure; Figure 3The sound power (dB) curves of the first horn 2 (Large horn) and the second horn 3 (Small horn) in the speaker module 100 are shown in Figure 1. The second horn 3 on one side is prone to produce a valley at high frequencies. In this case, the second horn 3 can be used to perform peak-valley compensation to match the curves of the two. In the figure, a is used to represent the sound power curve of the Large horn, and b is used to represent the sound power curve of the Small horn. Figure 4 Schematic diagram of the acoustic performance test results of the speaker module 100. It can be seen from the figure that the sensitivity of the test result curve d of the conventional side-sounding module at the same frequency is lower than the test result curve c of the multi-stage horn plus outlet matching model, the test result curve e of the initial version of the 2-stage horn, the test result curve f of the initial version of the 2-stage horn plus sound-absorbing material, the test result curve g of the multi-stage variable-section horn, the test result curve h of the multi-stage variable-section horn plus sound-absorbing material and the test result curve i of the positive sound of the large rear cavity module. In addition, it can be seen from the above test results that compared with the sound of the conventional side-sounding module, various schemes with horns have an improvement in the high-frequency band, among which the frequency band bandwidth and frequency response fluctuation of the multi-stage horn matching plus outlet matching model are higher than other technical solutions.

[0044] As another optional embodiment of the speaker module 100, the second section 22 and / or the third section 23 and / or the fifth section 32 are filled with sound absorbing materials. Although this will increase the manufacturing cost of the speaker, it can complement the response curve of the first horn 2 and / or the second horn 3 to improve the high-frequency performance of the speaker module 100.

[0045] Figure 5 : is a sound pressure level (SPL) curve of the speaker module 100, in which j represents the SPL curve of ori, and k represents the SPL curve of ori+resistance1100 (internal impedance 1100 Pa*s / m)+extend space. When a valley is generated at a high-frequency position by the horn from the sound-emitting side of the speaker box 1 in the horizontal axis direction to the mobile terminal, the horn damping can be increased by filling a small cavity with sound-absorbing material to smooth out the high-frequency SPL curve; and gradually increasing the volume can change the sound capacity, thereby achieving control of the resonant frequency point.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A speaker module for a mobile terminal provided with a sound outlet, the speaker module comprising a speaker box, the speaker box comprising a first sound output opening and a second sound output opening for side sound emission, the first sound output opening and the second sound output opening being respectively arranged on two opposite sides of the speaker box; characterized in that: The speaker module also includes a first horn and a second horn, both of which are hollow and open at both ends; one end of the first horn is connected to the side of the speaker box and communicated with the first sound output opening, and the other end of the first horn is used to connect to the sound outlet of the mobile terminal; one end of the second horn is connected to the side of the speaker box and communicated with the second sound output opening, and the other end of the second horn is used to connect to the sound outlet of the mobile terminal; the first horn and the second horn are asymmetrically arranged with respect to the speaker box.

2. The speaker module according to claim 1, wherein: The first horn includes a plurality of horns; the second horn includes a plurality of horns.

3. The speaker module according to claim 1, wherein: The first horn includes a first section connected to the first sound output opening, a second section bent and extended from one end of the first section away from the speaker box and spaced from the speaker box, and a third section extended from one end of the second section away from the first section, wherein the third section is used to be connected to the sound outlet of the mobile terminal.

4. The speaker module according to claim 3, characterized in that: The second horn includes a fourth section connected to the second sound output opening and bent, and a fifth section extending from one end of the fourth section away from the speaker box and spaced from the speaker box, wherein the fifth section is used to be connected to the sound outlet of the mobile terminal.

5. The speaker module according to claim 4, characterized in that: Along the sound emitting direction of the first horn, the cross-sectional area of ​​the third section gradually increases; along the sound emitting direction of the second horn, the cross-sectional area of ​​the fifth section gradually increases.

6. The speaker module according to claim 3, characterized in that: The number of resonance peaks of the first horn is proportional to its length.

7. The speaker module according to claim 4, characterized in that: The speaker box is rectangular, the first sound output opening and the second sound output opening are respectively arranged on two short axis sides of the speaker box, and the third section of the first horn and the fifth section of the second horn both extend beyond the plane where the long axis side of the speaker box is located.

8. The speaker module according to claim 7, wherein: The first horn comprises a plurality of first sections of the plurality of first horns, which are arranged side by side along the short axis direction of the speaker box, the second sections of the plurality of first horns are arranged in staggered layers along the thickness direction of the speaker box, and the third sections of the plurality of first horns are arranged side by side along the long axis direction of the speaker box.

9. The speaker module according to claim 7, wherein: The second horn comprises a plurality of parts, wherein portions of the plurality of fourth sections of the plurality of second horns close to the speaker box are arranged side by side along the short axis direction of the speaker box, portions of the plurality of fourth sections of the plurality of second horns away from the speaker box are arranged in staggered layers along the thickness direction of the speaker box, and portions of the plurality of fifth sections of the plurality of second horns are arranged side by side along the long axis direction of the speaker box.

10. The speaker module according to claim 4, wherein: The second section and / or the third section and / or the fifth section are filled with sound absorbing material.

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