Loudspeaker module and intelligent head-mounted device

Abstract

A loudspeaker module and an intelligent head-mounted device. The loudspeaker module comprises: a loudspeaker housing (1), an accommodating cavity (2) being provided within the loudspeaker housing (1), and the accommodating cavity (2) having a first space and a second space; a first sound-producing unit, which divides the first space into a first rear sound cavity (22) and a first front sound cavity (21), a first speaker hole (3) being provided in a first surface (11) of the loudspeaker housing (1), and the first front sound cavity (21) being in communication with the outside of the loudspeaker housing (1) via the first speaker hole (3); and a second sound-producing unit, which divides the first space into a second rear sound cavity (24) and a second front sound cavity (23), a second speaker hole (4) being provided in the first surface (11), and the second front sound cavity (23) being in communication with the outside of the loudspeaker housing (1) via the second speaker hole (4). Compared with the prior art, by means of providing two speaker holes which are located in the same surface of the loudspeaker housing (1), the sound of the loudspeaker module is supplemented and superposed, and the overall frequency range and loudness are also increased.

Description

A speaker module and smart head-mounted device Technical Field

[0001] The present invention relates to the technical field of intelligent wearable devices, and in particular to a speaker module and an intelligent head-mounted device. Background Art

[0002] The speakers of head-worn products are mainly single speakers, usually with a single sound-emitting diaphragm and a main speaker hole, and adopt a design with a sound leakage hole in the rear cavity. The sound is emitted from the diaphragm, transmitted to the external space through the main speaker hole, and finally reaches the human ear.

[0003] Existing technical solutions, limited by the performance of a single speaker, cannot simultaneously meet the requirements of an ideal frequency range and sufficient loudness. Therefore, the low-frequency effect is usually limited and cannot meet the needs of better low-frequency reproduction in practical applications. At the same time, this structure is highly dependent on the performance of the single speaker itself, and there is little room for algorithm optimization. Technical issues

[0004] The purpose of the present invention is to provide a speaker module and an intelligent head-mounted device to solve the technical problems in the prior art, which can improve the overall frequency range and loudness of the speaker. Technical Solutions

[0005] In a first aspect, the present invention provides a speaker module, comprising:

[0006] A speaker housing, wherein a receiving cavity is provided in the speaker housing, and the receiving cavity has a first space and a second space;

[0007] a first sound-emitting unit fixed in the receiving cavity, the first sound-emitting unit dividing the first space into a first rear sound cavity and a first front sound cavity, a first sound-emitting hole being formed on the first surface of the speaker housing, the first front sound cavity being connected to the exterior of the speaker housing through the first sound-emitting hole;

[0008] A second sound-emitting unit is fixed in the receiving cavity. The second sound-emitting unit divides the first space into a second rear sound cavity and a second front sound cavity. A second sound-emitting hole is opened on the first surface. The second front sound cavity is connected to the outside of the speaker housing through the second sound-emitting hole.

[0009] In the speaker module as described above, preferably, the first sound hole and the second sound hole both extend along a first direction, the projection of the first sound hole in the second direction completely falls on the second sound hole, and the first direction is perpendicular to the second direction.

[0010] In the speaker module as described above, preferably, both the first sound-speaker hole and the second sound-speaker hole are rectangular or waist-shaped structures.

[0011] In the speaker module as described above, preferably, a sound leakage hole is provided on the speaker housing, and the first rear sound cavity and / or the second rear sound cavity is connected to the outside of the speaker housing through the sound leakage hole.

[0012] In the loudspeaker module as described above, preferably, the loudspeaker housing has a second surface, the second surface is arranged opposite to the first surface, and the sound leakage hole is arranged on the second surface.

[0013] In the speaker module as described above, preferably, the first sound emitting unit is used to receive a first frequency band signal, the second sound emitting unit is used to receive a second frequency band signal, and the frequency of the first frequency band signal is different from the frequency of the second frequency band signal.

[0014] In the loudspeaker module as described above, preferably, the frequency of the first frequency band signal is greater than the frequency of the second frequency band signal.

[0015] In the loudspeaker module as described above, preferably, the first rear acoustic cavity and the second rear acoustic cavity are combined into a complete rear acoustic cavity.

[0016] A speaker module as described above, wherein preferably, the speaker housing includes a first sub-housing and a second sub-housing that overlap each other, the first sound-emitting unit is located in the first sub-housing, and the second sound-emitting unit is located in the second sub-housing.

[0017] In a second aspect, the present invention provides an intelligent head-mounted device, comprising the aforementioned speaker module. Beneficial effects

[0018] Compared with the prior art, the present invention provides two speaker holes, and the two speaker holes are located on the same surface of the speaker housing, thereby supplementing and superimposing the sound of the speaker module, while improving the overall frequency range and loudness, especially strengthening the playback effect of low-frequency signals, thereby achieving sound quality enhancement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is an axonometric view of the overall structure of an embodiment provided by the present invention from one perspective;

[0020] FIG2 is an axonometric view of the overall structure of the embodiment provided by the present invention from another perspective;

[0021] FIG3 is a front view of the overall structure of an embodiment provided by the present invention;

[0022] FIG4 is a cross-sectional view taken along line AA of FIG3 ;

[0023] FIG5 is a rear view of the overall structure of the embodiment provided by the present invention;

[0024] Figure 6 is a sectional view taken along line BB in Figure 5;

[0025] FIG7 is a schematic diagram of an exploded structure of the overall structure of an embodiment provided by the present invention from one perspective;

[0026] FIG8 is a schematic diagram of an exploded structure of the overall structure of the embodiment provided by the present invention from another perspective.

[0027] Explanation of Reference Numerals: 1 - speaker housing, 11 - first surface, 12 - second surface, 2 - receiving cavity, 21 - first front acoustic cavity, 22 - first rear acoustic cavity, 23 - second front acoustic cavity, 24 - second rear acoustic cavity, 3 - first loudspeaker hole, 4 - second loudspeaker hole, 5 - sound leakage hole, 6 - first sub-housing, 7 - second sub-housing;

[0028] D1-first direction;

[0029] D2 - Second direction. Best Mode for Carrying Out the Invention

[0030] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention.

[0031] As shown in FIG1 to FIG8 , an embodiment of the present invention provides a speaker module, including:

[0032] A speaker housing 1 is provided with a receiving cavity 2 therein, and the receiving cavity 2 has a first space and a second space. Those skilled in the art will know that the first space and the second space can be two physically separated spaces that are not connected to each other, or they can be two artificially defined areas, which are two different areas of a complete space and are connected to each other.

[0033] The first sound-emitting unit (not shown) is fixed in the receiving cavity 2 and is located in the first space. The first sound-emitting unit divides the first space into a first rear sound cavity 22 and a first front sound cavity 21. A first sound-emitting hole 3 is provided on the first surface 11 of the speaker housing 1. The first front sound cavity 21 is connected to the outside of the speaker housing 1 through the first sound-emitting hole 3. The first sound-emitting unit is used for vibrating and making sounds. In a feasible embodiment, the first sound-emitting unit may include structures such as a diaphragm, a voice coil, and a magnetic circuit unit. Under the action of the magnetic circuit unit, the voice coil with a changing current is vibrated by Ampere forces of different sizes. The vibration of the voice coil drives the vibration of the diaphragm, and the vibration of the diaphragm drives the surrounding air to vibrate, thereby generating sound. The first sound-emitting hole 3 radiates the sound waves of the first front sound cavity 21 to the outside.

[0034] The second sound unit (not shown) is fixed in the accommodating cavity 2 and is located in the second space. The second sound unit divides the second space into a second rear sound cavity 24 and a second front sound cavity 23. A second sound hole 4 is provided on the first surface 11. The second front sound cavity 23 is connected to the outside of the speaker housing 1 through the second sound hole 4. The second sound unit is also used for vibration sound generation. Its sound generation principle is the same as that of the first sound unit, which will not be repeated here.

[0035] The first sound hole 3 and the second sound hole 4 are both located on the same surface of the speaker housing 1, and the sound waves emitted by the two are complementary and superimposed. At the same time, the first sound unit and the second sound unit can be driven by the same or different signals, thereby improving the overall frequency range and loudness, especially strengthening the playback effect of low-frequency signals, and achieving sound quality enhancement.

[0036] Further, referring to Figures 3 and 5, the first sound hole 3 and the second sound hole 4 both extend along the first direction D1 and are arranged in parallel. There is a preset distance between the first sound hole 3 and the second sound hole 4. This preset distance can be determined according to the actual sound quality adjustment needs to achieve a good sound wave superposition effect, and is not limited here.

[0037] In a feasible embodiment, as shown in Figure 3, the length of the first sound speaker hole 3 is smaller than the length of the second sound speaker hole 4, and the projection of the first sound speaker hole 3 in the second direction D2 falls completely on the second sound speaker hole 4. The first direction D1 is perpendicular to the second direction D2, which can effectively and gradually radiate the emitted sound waves and the reflected sound waves, thereby further improving the sound wave superposition effect. Those skilled in the art will know that the length of the first sound speaker hole 3 can also be the same as the length of the second sound speaker hole 4, and the projection of the first sound speaker hole 3 in the second direction D2 overlaps with the second sound speaker hole 4, and the two are arranged side by side.

[0038] 1 and 3 , the first sound hole 3 and the second sound hole 4 are both rectangular or waist-shaped structures, and their length along the first direction D1 is much greater than the length along the second direction D2, thereby reducing the energy of the reflected sound waves. At the same time, the flat first sound hole 3 or the second sound hole 4 can gradually radiate most or all of the reflected sound waves to the outside world, which can largely avoid standing wave interference inside the first front sound cavity 21 or the second front sound cavity 23, reduce the fluctuation amplitude of the frequency response curve of the speaker module in the full frequency band, and improve the acoustic performance of the speaker module.

[0039] In the embodiment provided in this application, as shown in FIG2 , a sound leakage hole 5 is provided on the speaker housing 1. The sound leakage hole 5 is also a flat rectangular or waist-shaped structure. The first rear acoustic cavity 22 and / or the second rear acoustic cavity 24 are connected to the exterior of the speaker housing 1 through the sound leakage hole 5. The sound leakage hole 5 cooperates with the first loudspeaker hole 3 and / or the second loudspeaker hole 4 to utilize the dipole effect to reduce sound leakage, thereby improving privacy. The dipole effect is understandable and achievable to those skilled in the art and will not be described in detail in this application.

[0040] In a feasible embodiment, the first rear sound cavity 22 of the first sound unit and the second rear sound cavity 24 of the second sound unit are separated and not connected to each other. Two sound leakage holes 5 are provided on the speaker housing 1, and the first rear sound cavity 22 and the second rear sound cavity 24 correspond to one of the sound leakage holes 5 respectively.

[0041] In another feasible embodiment, referring to Figures 4 and 6, the first space and the second space are combined into a complete space, the two are interconnected, the first rear sound cavity 22 and the second rear sound cavity 24 are combined into a complete rear sound cavity, the first sound unit and the second sound unit share one rear sound cavity, and there is only one sound leakage hole 5, thereby simplifying the structure.

[0042] Furthermore, the speaker housing 1 has a second surface 12, which is arranged opposite to the first surface 11, and the first surface 11 and the second surface 12 have the same extension direction. The sound leakage hole 5 is provided on the second surface 12, and the sound leakage hole 5 and the first sound hole 3 and the second sound hole 4 are respectively located on two opposite surfaces. Referring to Figures 1, 2, 4 and 6, the shape of the sound leakage hole 5 is adapted to the formation of the first sound hole 3 and the second sound hole 4. The position of the sound leakage hole 5 on the second surface 12 is staggered or only partially overlapped with the projected position of the first sound hole 3 and the second sound hole 4. The sound waves generated by the first sound unit and the sound waves generated by the second sound unit are superimposed on each other, and form a dipole effect with the sound leakage generated by the sound leakage hole 5 and offset each other, thereby further reducing sound leakage to enhance the privacy of the speaker module.

[0043] In the embodiment provided in the present application, the first sound unit and the second sound unit can be designed with different performances, such as different frequency ranges, and then by matching each other, the overall frequency range can be expanded. Specifically, the first sound unit is used to receive a first frequency band signal, and the second sound unit is used to receive a second frequency band signal. The frequency of the first frequency band signal is different from the frequency of the second frequency band signal, thereby realizing the interaction of sound waves in different combinations, providing a larger operating space for the active algorithm, and at the same time providing a richer acoustic experience.

[0044] In one feasible embodiment, the frequency of the first frequency band signal is greater than the frequency of the second frequency band signal. The first frequency band signal can be a mid-high frequency signal, and the second frequency band signal can be a mid-low frequency signal. The first sound-emitting unit can be a mid-low frequency speaker, and the second sound-emitting unit can be a mid-high frequency speaker. This improves the high-frequency reproduction of the speaker module and reduces the intermodulation distortion of the speaker module, while maintaining an ideal frequency range and sufficient loudness, meeting the need for better low-frequency reproduction in practical applications.

[0045] In the embodiment provided in the present application, referring to Figures 7 and 8, the speaker housing 1 includes a first sub-housing 6 and a second sub-housing 7 that cover each other. The first sub-housing 6 and the second sub-housing 7 are connected by snap-fitting parts. The structure of the snap-fitting parts can refer to the technical solutions in the prior art and will not be elaborated here. In actual applications, the speaker housing 1 can also be of other structures, such as being formed by a combination of more housings, or being integrally formed, which is not limited here.

[0046] The first sound unit is located in the first sub-shell 6, and the first sound hole 3 is also provided on the first sub-shell 6. The second sound unit is located in the second sub-shell 7, and the first sound hole 3 is also provided on the second sub-shell 7. This makes it easy to assemble the first sound unit and the second sound unit into the speaker shell 1, and is also convenient for disassembly and maintenance, meeting the needs of mass production.

[0047] Based on the above embodiments, the present application also provides a smart head-mounted device, such as smart glasses, headphones, HMD (Head-Mounted Display) devices, etc. The smart wearable device can be an AR (Augmented Reality), VR (Virtual Reality), or MR (Mixed Reality) device.

[0048] The smart head-mounted device includes the aforementioned speaker module, such as AR glasses, which include a frame and two temples connected to opposite ends of the frame, and speaker modules are respectively provided at symmetrical positions of the two temples.

[0049] In summary, the speaker module of the smart head-mounted device of the present application is equipped with two speaker holes, and the two speaker holes are located on the same surface of the speaker shell 1, thereby supplementing and superimposing the sound of the speaker module, while improving the overall frequency range and loudness, especially strengthening the playback effect of low-frequency signals, and achieving sound quality enhancement.

[0050] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the scope of implementation of the present invention is not limited to what is shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which do not exceed the spirit covered by the description and drawings, should be within the scope of protection of the present invention.

Claims

1. A speaker module, characterized in that, comprising: a speaker housing, a receiving cavity is provided in the speaker housing, and the receiving cavity has a first space and a second space; a first sound generating unit, fixed in the receiving cavity, the first sound generating unit divides the first space into a first rear sound cavity and a first front sound cavity, a first sound hole is formed on a first surface of the speaker housing, and the first front sound cavity is communicated with the outside of the speaker housing through the first sound hole; a second sound generating unit, fixed in the receiving cavity, the second sound generating unit divides the first space into a second rear sound cavity and a second front sound cavity, a second sound hole is formed on the first surface, and the second front sound cavity is communicated with the outside of the speaker housing through the second sound hole.

2. The speaker module according to claim 1, characterized in that, both the first sound hole and the second sound hole extend along a first direction, a projection of the first sound hole in a second direction completely falls on the second sound hole, and the first direction is perpendicular to the second direction.

3. The speaker module according to claim 1, characterized in that, both the first sound hole and the second sound hole are of a rectangular or kidney-shaped structure.

4. The speaker module according to claim 1, characterized in that, a sound leakage hole is formed on the speaker housing, and the first rear sound cavity and / or the second rear sound cavity is communicated with the outside of the speaker housing through the sound leakage hole.

5. The speaker module according to claim 4, characterized in that, the speaker housing has a second surface, the second surface is disposed opposite to the first surface, and the sound leakage hole is disposed on the second surface.

6. The speaker module according to claim 1, characterized in that, the first sound generating unit is used to receive a first frequency band signal, the second sound generating unit is used to receive a second frequency band signal, and the frequency of the first frequency band signal is different from the frequency of the second frequency band signal.

7. The speaker module according to claim 6, characterized in that, the frequency of the first frequency band signal is greater than the frequency of the second frequency band signal.

8. The speaker module according to claim 1, characterized in that, the first rear sound cavity and the second rear sound cavity are combined into a complete rear sound cavity.

9. The speaker module according to claim 1, characterized in that, the speaker housing includes a first sub-housing and a second sub-housing that are covered with each other, the first sound generating unit is located in the first sub-housing, and the second sound generating unit is located in the second sub-housing.

10. An intelligent head-mounted device, characterized in that, comprising the speaker module according to any one of claims 1-9.

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