WO2021000104A1

WO2021000104A1 - Speaker box

Info

Publication number: WO2021000104A1
Application number: PCT/CN2019/094001
Authority: WO
Inventors: 吴军; 李健; 任莉
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2019-06-29
Filing date: 2019-06-29
Publication date: 2021-01-07
Also published as: CN210641068U

Abstract

The present application provides a speaker box. The speaker box comprises an upper housing, a lower housing matched with the upper housing to form an accommodating space, and a sound-producing unit accommodated in the accommodating space; the sound-producing unit separates the accommodating space into a front cavity and a rear cavity; the upper housing comprises a top wall, a supporting wall and a surrounding wall extending from the top wall to the lower housing, and a cover plate covering the surrounding wall; the surrounding wall is connected to the outer side of the supporting wall; the supporting wall, the surrounding wall, the top wall, and the cover plate together enclose a resonant cavity; the resonant cavity is communicated with the front cavity; the speaker box also comprises a partition plate, and the partition plate divides the resonant cavity into at least two stacked sub-resonant cavities in communication with each other. Compared with the related art, the speaker box provided in the present application can effectively reduce the high-frequency resonance peak and sensitivity and improve the acoustic performance of the speaker box.

Description

Speaker box

Technical field

This application relates to the field of electro-acoustic conversion, in particular to a speaker box.

Background technique

In recent years, with the rapid development of mobile communication technology, consumers have increasingly used mobile communication devices with voice functions, such as portable phones, handheld game consoles, and laptop computers. The speaker box is used as a voice playback device, and its design directly affects the voice performance of mobile communication equipment products. In order to meet the market's demand for thinness and high sound quality, higher requirements are put forward for the design of the speaker box.

In the related art, the speaker box includes an upper shell, a lower shell, and a sound-producing unit. The sound-producing unit includes a diaphragm. The diaphragm is separated from the upper case to form a front sound cavity. The sound guide channel is formed on the side wall of the upper case, the front sound cavity and the sound guide. The channel forms the front cavity, and this structure will produce a resonance peak in the high frequency response; with the popularization of stereo applications on mobile phones, speakers no longer pursue high high frequency response, and high frequency response (especially 4000Hz to 6000Hz) High can cause poor sound quality such as harsh sound and sharp labial and tooth sound.

Therefore, it is necessary to provide a new speaker box to solve the above-mentioned drawbacks.

technical problem

The main technical problem solved by this application is how to effectively reduce the high-frequency resonance peak value and sensitivity of the speaker box.

Technical solutions

In order to solve the above technical problems, the present application provides a speaker box, which includes an upper shell, a lower shell that cooperates with the upper shell to form an accommodation space, and a sounding monomer accommodated in the accommodation space. The accommodating space is divided into a front cavity and a rear cavity, the sound-producing monomer includes a diaphragm for vibrating and sounding, and the diaphragm and the upper shell are spaced apart to form a front acoustic cavity, and the upper shell is formed to communicate with the front A sound guide channel between the sound cavity and the outside, the sound guide channel and the front sound cavity together form the front cavity of the speaker box, and the upper shell includes a top wall directly opposite to the diaphragm and a direction from the top wall The supporting wall extending in the direction of the lower shell, the surrounding wall extending from the top wall in the direction of the lower shell and connected to the outside of the supporting wall, and a cover plate covering the surrounding wall, the support The wall, the surrounding wall, the top wall and the cover plate jointly enclose a resonant cavity, the resonant cavity and the front cavity are connected, the speaker box further includes a partition plate, the partition plate The resonant cavity is divided into at least two sub-resonant cavities connected to each other and stacked along the vibration direction of the diaphragm.

In a preferred embodiment of the speaker box provided by the present application, the resonant cavity is in communication with the front acoustic cavity, the supporting wall is provided with a gap corresponding to the resonant cavity, and the gap is connected to the resonant cavity and the resonant cavity. Said before the sound cavity.

In a preferred embodiment of the speaker box provided by the present application, the resonant cavity and the sound guide channel are arranged on opposite sides of the sound emitting monomer.

In a preferred embodiment of the speaker box provided by the present application, the sub-resonant cavity includes a first sub-resonant cavity and a second sub-resonant cavity that communicate with the front acoustic cavity through the gap, and the partition plate A communicating hole is provided therethrough, and the second sub-resonant cavity communicates with the first sub-resonant cavity through the communicating hole.

In a preferred embodiment of the speaker box provided by the present application, the speaker box further includes a receiving hole that penetrates the top wall and communicates with the first sub-resonant cavity, and the surrounding wall and the supporting wall are shared The cover plate includes a first cover plate and a second cover plate respectively covering both ends of the two-end opening structure. The first cover plate is received in the receiving hole and The first cover plate is arranged flush with the top wall, the second cover plate is arranged away from the top wall and is accommodated in the containing space, and the second cover plate is connected to the supporting wall and the enclosure The wall is set flush.

In a preferred embodiment of the speaker box provided by the present application, the first cover plate, the surrounding wall, the support wall and the partition plate jointly enclose the first sub-resonant cavity, so The partition plate, the surrounding wall, the supporting wall and the second cover plate jointly enclose the second sub-resonant cavity.

In a preferred embodiment of the speaker box provided by the present application, the speaker box further includes an air-permeable spacer attached to the partition plate, and the air-permeable spacer covers the communicating hole.

In a preferred embodiment of the speaker box provided by the present application, the speaker box further includes a sound-absorbing material, and the sound-absorbing material is filled in the second sub-resonant cavity.

In a preferred embodiment of the speaker box provided by the present application, the top wall, the supporting wall, the surrounding wall and the partition plate are integrally arranged.

In a preferred embodiment of the speaker box provided in the present application, the upper shell further includes a side wall extending from the top wall toward the lower shell and fixed to the lower shell, and the side wall corresponds to The sound guide channel is provided with a sound guide hole, and the upper shell further includes a partition plate whose one end abuts the other end of the sound-producing monomer and extends to the sound guide hole, and the sound guide channel is formed in the partition Between the board and the top wall.

Beneficial effect

Compared with the prior art, in the speaker box provided by the present application, in the speaker box provided by the present application, firstly, by providing the first sub-resonant cavity and the second sub-resonant cavity in communication with the front cavity, it is equivalent to the original On the basis of the cavity, an additional cavity can be obtained by changing the size of the gap to obtain the effect of different frequency response curves, effectively reducing the Q value (quality factor value) and sensitivity of the high frequency resonance peak of the speaker box, and improving the high frequency Listening; secondly, the supporting wall and the second cover that enclose the resonant cavity are all accommodated in the accommodation space of the speaker box, and the surface of the first cover and the outer side of the top wall The surface is arranged flush, such a structure does not occupy the height space of the speaker box, and can meet the design requirements of thin and light speaker box; finally, by adjusting the mesh number of the air-permeable spacer and the second sub-resonant cavity Filling with sound-absorbing materials can also obtain the effects of different frequency response curves, effectively reducing the Q value (quality factor value) and sensitivity of the high-frequency formant of the speaker box, and improving the high-frequency hearing.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. Those of ordinary skill in the art can obtain other drawings based on these drawings without creative work, among which:

Figure 1 is a schematic diagram of the three-dimensional structure of the speaker box provided by this application;

Figure 2 is a schematic diagram of an exploded structure of the speaker box shown in Figure 1;

Fig. 3 is a schematic diagram of an enlarged structure at III in Fig. 2;

4 is a schematic diagram of the assembly structure of the other side of the upper shell shown in FIG. 2;

Figure 5 is a cross-sectional view of the speaker box shown in Figure 1 along the line V-V;

Figure 6 is a cross-sectional view of the speaker box shown in Figure 1 along line VI-VI;

Figure 7 shows the frequency response curve of the speaker box without the resonant cavity;

Figure 8 is a frequency response curve diagram of the speaker box in the case of a single resonant cavity;

Figure 9 is the frequency response curve of the speaker box in the case of dual resonant cavities.

The best mode of the invention

The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of this application.

Please refer to FIGS. 1 to 4 at the same time. FIG. 1 is a schematic diagram of the three-dimensional structure of the speaker box provided by this application; FIG. 2 is a schematic diagram of the exploded structure of the speaker box shown in FIG. 1; FIG. 3 is an enlarged schematic diagram of the structure at III in FIG. Figure 4 is a schematic diagram of the other side of the upper shell shown in Figure 2. The present application provides a speaker box 100. The speaker box 100 includes an upper shell 1, a lower shell 2, a sound-producing monomer 3 with a diaphragm 31, a cover plate 4, a breathable isolator 5, a sound-absorbing material 6, a resonant cavity 10, The front acoustic cavity 20, the sound guide channel 30, the front cavity 40 and the rear cavity 50.

The upper shell 1 is used to carry and protect the sound emitting monomer 3, the lower shell 2 is arranged on the upper shell 1 and cooperates with the upper shell 1 to form a receiving space, and the sound emitting monomer 3 is accommodated in Inside the receiving space, and the sound emitting monomer 3 separates the receiving space into the front cavity 40 and the rear cavity 50. The diaphragm 31 is used for vibrating and sounding, the upper shell 1 and the diaphragm 31 are spaced apart to form the front acoustic cavity 20, and the sound guide channel 30 is formed in the upper shell 1 and communicates with the front acoustic cavity 20 and the outside, the front acoustic cavity 20 and the sound guide channel 30 together form the front cavity 40 for conducting sound to the outside. The upper shell 1, the lower shell 2 and the diaphragm 31 cooperate to form the rear cavity 50.

The upper shell 1 includes a top wall 11 directly opposite to the diaphragm 31, a supporting wall 12 extending from the top wall 11 to the lower shell 2 and used for holding the sounding monomer 3, and A surrounding wall 13 formed on the inner surface of the top wall 11 extending in the direction of the lower shell 2, a partition plate 14 extending from the middle of the surrounding wall 13 to the supporting wall 12, and covering the surrounding wall 13 And a side wall 15 extending from the top wall 11 toward the lower shell 2 and fixed to the lower shell 2. More preferably, the top wall 11, the supporting wall 12, the surrounding wall 13 and the partition plate 14 are integrally arranged.

The top wall 11 is provided with a receiving hole 111 passing through it.

The supporting wall 12 is used to fix the sounding monomer 3 and the sounding monomer 3 and the supporting wall 12 are fixed by glue bonding, so that the sounding monomer 3 and the supporting wall 12 can be firmly formed The connection structure.

The surrounding wall 13 and the supporting wall 12 are connected to form a through structure with open ends, and the receiving hole 111 is connected to the structure with open ends.

Please refer to FIGS. 5 and 6 in combination. FIG. 5 is a cross-sectional view of the speaker box shown in FIG. 1 along the line V-V; FIG. 6 is a cross-sectional view of the speaker box shown in FIG. 1 along the line VI-VI. The cover plate 4 includes a first cover plate 41 and a second cover plate 42 respectively covering both ends of the two-end opening structure. The first cover plate 41 is received in the receiving hole 111 and the first cover plate 41 is The cover plate 41 is arranged flush with the top wall 11, the second cover plate 42 is arranged away from the top wall 11 and is accommodated in the containing space, and the second cover plate 42 and the supporting wall 12 and The surrounding wall 13 is arranged flush. More preferably, with such a structure, the first cover 41 will not rise above the surface of the top wall 11, and the supporting wall 12, the surrounding wall 13, and the second cover 42 are all contained In the accommodating space of the speaker box 100, the height space of the speaker box 100 is not occupied, which can meet the design requirement of thin and light speaker box. The cover plate 4 is a plastic cover plate, a PET cover plate or a steel sheet.

The supporting wall 12, the surrounding wall 13, the top wall 11 and the cover plate 4 jointly enclose a resonant cavity 10, and the resonant cavity 10 and the front cavity 40 are in communication. Specifically, the resonant cavity 10 and the sound guide channel 30 are arranged on opposite sides of the sound emitting monomer 3. The resonant cavity 10 and the front acoustic cavity 20 are in communication, and the supporting wall 12 has a gap 121 corresponding to the resonant cavity 10, and the gap 121 communicates the resonant cavity 10 and the front acoustic cavity 20. At this time, the resonant structure of the resonant cavity 10 and the front cavity 40 can effectively reduce the Q value (quality factor value) and sensitivity of the high-frequency resonance peak of the speaker box, and improve the high-frequency hearing.

Please refer to Figures 7-9 again. Figure 7 is the frequency response curve of the speaker box without a resonant cavity; Figure 8 is the frequency response curve of the speaker box in the case of a single cavity; Figure 9 is the frequency response curve of the speaker box in the case of double resonators. The frequency response curve of the box. More preferably, the partition plate 14 separates the resonant cavity 10 into at least two sub-resonant cavities spaced apart from each other, connected to each other, and stacked along the vibration direction of the diaphragm 31. In this embodiment, the The number of sub-resonant cavities is two. The separating plate 14 separates the resonant cavity 10 into a first sub-resonant cavity 101 and a second sub-resonant cavity 102, and the separating plate 14 is provided with a penetrating through it. A communication hole 141, the first sub-resonant cavity 101 communicates with the front acoustic cavity 20 through the gap 121, and the second sub-resonant cavity 102 communicates with the first sub-resonant cavity 101 through the communication hole 141.

Based on the Helmholtz resonance principle, the first sub-resonant cavity 101 and the second sub-resonant cavity 102 can form anti-resonance at the resonance peak position of the front cavity 40 itself, thereby improving the high frequency of the speaker box 100 The flatness of the sound can also effectively reduce the effect of noise amplified by the resonance of the front cavity 40, and can effectively improve the acoustic performance of the speaker box 100. In the frequency range of 1000Hz-10000Hz, the frequency response curve of the dual resonant cavity structure is smoother and gentler than the frequency response curve of the single resonant cavity and the non-resonant cavity mechanism, which more effectively reduces the Q value of the high frequency resonance peak of the speaker box (Quality factor value) and sensitivity, greatly improve the high-frequency hearing.

The first cover 41, the surrounding wall 13, the support wall 12, and the partition plate 14 collectively enclose the first sub-resonant cavity 101, and the receiving hole 111 communicates with the first sub-cavity 101 Resonant cavity 101 and the outside world.

The partition plate 14, the surrounding wall 13, the supporting wall 12 and the second cover plate 42 jointly enclose the second sub-resonant cavity 102. The air-permeable spacer 5 is attached to the partition plate 14 and covers the communication hole 141. The sound-absorbing material 6 is filled in the second sub-resonant cavity 102.

The side wall 15 is provided with a sound guide hole 151 at a position corresponding to the sound guide channel 30, and the upper shell 1 further includes a partition plate whose one end abuts the sound emitting monomer 3 and the other end extends to the sound guide hole 151 16. The sound guide channel 30 is formed between the partition 16 and the top wall 11.

Compared with the prior art, in the speaker box provided by the present application, in the speaker box provided by the present application, firstly, by setting the first sub-resonant cavity and the second sub-resonant cavity in communication with the front cavity, it is equivalent to the original On the basis of the cavity, an additional cavity can be obtained by changing the size of the gap to obtain the effect of different frequency response curves, effectively reducing the Q value (quality factor value) and sensitivity of the high frequency resonance peak of the speaker box, and improving the high frequency Listening; secondly, the supporting wall and the second cover that enclose the resonant cavity are all accommodated in the accommodation space of the speaker box, and the surface of the first cover and the outer side of the top wall The surface is arranged flush, such a structure does not occupy the height space of the speaker box, and can meet the design requirements of thin and light speaker box; finally, by adjusting the mesh number of the air-permeable spacer and the second sub-resonant cavity Filling with sound-absorbing materials can also obtain the effects of different frequency response curves, effectively reducing the Q value (quality factor value) and sensitivity of the high-frequency formant of the speaker box, and improving the high-frequency hearing.

The above are only examples of this application, and do not limit the scope of this application. Any equivalent structure or equivalent process transformation made using the content of the description and drawings of this application, or directly or indirectly applied to other related technologies In the same way, all fields are included in the scope of patent protection of this application.

Embodiments of the invention

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Industrial applicability

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Sequence Listing Free Content

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Claims

A speaker box includes an upper shell, a lower shell that cooperates with the upper shell to form an accommodation space, and a sounding monomer accommodated in the accommodation space. The sounding monomer separates the accommodation space into a front cavity and a rear cavity. The sound-emitting unit includes a diaphragm for vibrating and sounding, and the diaphragm and the upper shell are spaced apart to form a front sound cavity, and the upper shell is formed with a sound guide channel connecting the front sound cavity and the outside. The sound guide channel and the front sound cavity together constitute the front cavity of the speaker box, wherein the upper shell includes a top wall directly opposite to the diaphragm, and a direction from the top wall to the lower shell An extended supporting wall, a surrounding wall extending from the top wall toward the lower shell and connected to the outside of the supporting wall, and a cover plate covering the surrounding wall, the supporting wall, the surrounding The wall, the top wall, and the cover plate collectively enclose a resonant cavity, the resonant cavity and the front cavity are connected, the speaker box further includes a partition plate, the partition plate separates the resonant cavity At least two sub-resonant cavities spaced apart and stacked along the vibration direction of the diaphragm are formed, and the sub-resonant cavities communicate with each other.
The speaker box according to claim 1, wherein the supporting wall is provided with a gap corresponding to the resonant cavity, and the gap connects the resonant cavity and the front acoustic cavity.
The speaker box according to claim 1, wherein the resonant cavity and the sound guide channel are arranged on opposite sides of the sound emitting monomer.
The speaker box according to claim 2, wherein the sub-resonant cavity includes a first sub-resonant cavity and a second sub-resonant cavity that communicate with the front acoustic cavity through the gap, and the partition plate is provided with Through the communication hole thereon, the second sub-resonant cavity communicates with the first sub-resonant cavity through the communication hole.
The speaker box of claim 4, wherein the speaker box further comprises a receiving hole that penetrates the top wall and communicates with the first sub-resonant cavity, and the surrounding wall and the supporting wall jointly enclose The structure with both ends open, the cover plate includes a first cover plate and a second cover plate respectively covering both ends of the two ends opening structure, the first cover plate is received in the receiving hole and the first cover plate A cover plate is arranged flush with the top wall, the second cover plate is arranged away from the top wall and is accommodated in the containing space, and the second cover plate is flush with the supporting wall and the surrounding wall Flat settings.
The speaker box according to claim 5, wherein the first cover plate, the surrounding wall, the supporting wall and the partition plate jointly enclose the first sub-resonant cavity, and the sub-cavity The partition plate, the surrounding wall, the supporting wall and the second cover plate jointly enclose the second sub-resonant cavity.
The speaker box according to claim 4, wherein the speaker box further comprises an air-permeable spacer attached to the partition plate, and the air-permeable spacer covers the communication hole.
The speaker box according to claim 1, wherein the speaker box further comprises a sound-absorbing material, and the sound-absorbing material is filled in the second sub-resonant cavity.
The speaker box according to claim 1, wherein the top wall, the supporting wall, the surrounding wall and the partition plate are integrally arranged.
The speaker box according to claim 1, wherein the upper shell further comprises a side wall extending from the top wall toward the lower shell and fixed to the lower shell, the side wall corresponding to the The sound guide channel is provided with a sound guide hole, and the upper shell further includes a partition plate whose one end abuts the other end of the sound emitting monomer and extends to the sound guide hole, and the sound guide channel is formed between the partition plate and the sound guide hole. Between the top wall.

To