WO2021000101A1

WO2021000101A1 - Loudspeaker box

Info

Publication number: WO2021000101A1
Application number: PCT/CN2019/093998
Authority: WO
Inventors: 陈伟; 吴军
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: CN110381399B; CN110381399A

Abstract

Provided is a loudspeaker box, which comprises an upper cover, a lower cover that encloses to form an accommodating space together with the upper cover, and a sound generating unit accommodated in the accommodating space. The lower cover comprises a top wall, a side wall, and a supporting wall; the supporting wall is provided around the sound generating unit, and the sound generating unit divides the accommodating space into a front cavity and a rear cavity; and the side wall is provided with a sound emission hole. The lower cover further comprises a surrounding wall, and the loudspeaker box further comprises a sealing assembly covering the surrounding wall, the surrounding wall, the supporting wall and the sealing assembly enclosing to form a resonant cavity. The supporting wall is provided with a through hole, and the resonant cavity communicates with the front cavity by means of the through hole. The sealing assembly comprises a cover plate fixed on the surrounding wall and an air-permeable spacer disposed on the cover plate. The air-permeable spacer and the cover plate are bonded and fixed by means of an adhesive layer. The sealing assembly is provided with a leakage hole, and the leakage hole communicates with the rear cavity by means of the air-permeable spacer. In the present invention, the resonant cavity increases the cavity volume of the front cavity and improves high-frequency acoustic performance; meanwhile, the leakage hole on the sealing assembly may balance the air pressure inside of the loudspeaker box.

Description

[Corrected according to Rule 91 06.08.2019] 　A speaker box

Technical field

The invention belongs to the technical field of electroacoustics, and particularly relates to a speaker box.

Background technique

With the rapid development of science and technology, audio equipment continues to develop rapidly, and people have higher and higher requirements for the functionality of audio equipment. For speaker boxes, more and more people have put forward higher requirements for their audio performance. In the related art, the space of the front cavity only includes the area directly facing the vocal unit and the sound guide channel area, which is relatively single, which makes the high frequency response too high, resulting in poor sound quality such as harsh sound, sharp labial and tooth, or resonance frequency Falling in the sensitive frequency band of the piano sound results in poor piano sound quality.

technical problem

The technical problem to be solved by the present invention is to provide a loudspeaker box, which aims to solve the problems of sharp high-frequency sound quality of the loudspeaker box and poor sound quality of labial tooth and piano sound in the prior art.

Technical solutions

A first aspect of the embodiments of the present invention provides a speaker box, which includes an upper cover, a lower cover that is enclosed with the upper cover to form an accommodating space, and a sound emitting unit accommodated in the accommodating space, and the lower cover includes a top wall And a side wall extending from the periphery of the top wall toward the upper cover and enclosed and fixed with the upper cover, and extending from the top wall toward the upper cover direction into the receiving space and fixing the sound A single supporting wall, the supporting wall is arranged around the sounding monomer, the sounding monomer divides the containing space into a front cavity and a rear cavity, the top wall, the supporting wall and the The sounding monomers are enclosed to form the front cavity, the side wall is provided with a sound outlet communicating with the front cavity, and the lower cover further includes a direction extending from the top wall to the upper cover to the rear cavity The speaker box further includes a sealing component covering an end of the surrounding wall away from the top wall, the surrounding wall is connected to the supporting wall, the surrounding wall, the supporting wall and the The sealing component is enclosed to form a resonant cavity, the supporting wall is provided with a through hole, the resonant cavity is communicated with the front cavity through the through hole, and the sealing component includes a cover plate fixed on the surrounding wall and An air-permeable spacer arranged above the cover plate, the air-permeable spacer and the cover plate are bonded and fixed by an adhesive layer, and the sealing assembly is provided with leakage that sequentially penetrates the cover plate and the adhesive layer A hole, the leakage hole communicates with the rear cavity through the air-permeable partition.

Further, the conducting hole is directly opposite to the sound outlet.

Further, the support wall includes an upper end surface facing the upper cover, and an inner wall surface and an outer wall surface respectively extending from both sides of the upper end surface to the top wall, the inner wall surface is located near the support wall. On one side of the front cavity, the outer wall surface is located on the side of the support wall close to the rear cavity, the upper end surface is recessed toward the top wall to form a first groove, and the first groove extends to On the inner wall surface, the first groove is arranged along the circumferential direction of the inner ring of the support wall, and the sound emitting monomer is fixed on the first groove.

Further, the surrounding wall includes an upper surface facing the upper cover, and an inner side surface of the top wall extending from a side of the upper surface close to the resonant cavity, the upper surface facing the top A second groove is recessed in the wall direction, the second groove extends to the inner side surface, the second groove is arranged along the circumference of the surrounding wall, and the sealing component is fixed to the second groove. groove.

Further, the first groove and the second groove communicate with each other.

Further, the leakage hole is opened in the center of the cover plate.

Further, the adhesive layer is a double-sided adhesive tape.

Further, the sealing component is integrally processed by die cutting.

Beneficial effect

Compared with the prior art, the present invention has the beneficial effects that: the speaker box of the present invention forms a resonant cavity communicating with the front cavity between the upper cover and the lower cover, and the resonant cavity is sealed by a sealing component, which can effectively increase the cavity of the front cavity. Volume, improve the high-frequency acoustic performance, reduce the Q value (quality factor value) and sensitivity of the high-frequency resonance peak of the speaker box, so that the acoustic performance of the speaker box is better, and because the leak hole is opened on the sealing component, the leak hole is isolated by ventilation The parts communicate with the rear cavity, so that the air pressure inside the speaker box can also be balanced.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of a speaker box provided by an embodiment of the present invention;

2 is a schematic diagram of an exploded structure of a speaker box provided by an embodiment of the present invention;

Fig. 3 is a schematic sectional view of the A-A plane of Fig. 1;

Figure 4 is an enlarged schematic view of part B in Figure 3;

Fig. 5 is a schematic diagram of the overall structure of a lower cover provided by an embodiment of the present invention.

Embodiments of the invention

The present invention will be further described below with reference to the drawings and embodiments.

As shown in Figures 1 to 3, it is a speaker box provided by an embodiment of the present invention. The speaker box includes an upper cover 1, a lower cover 3 that is enclosed with the upper cover 1 to form a housing space 5, and a housing The sound-emitting unit 2, the lower cover 3 includes a top wall 32, a side wall 35 extending from the periphery of the top wall 32 toward the upper cover 1 and surrounding and fixed with the upper cover 1, and extending from the top wall 32 toward the upper cover 1 to the receiving space 5 The supporting wall 33 of the sounding unit 2 is fixed inside and the supporting wall 33 is arranged around the sounding unit 2. The sounding unit 2 divides the containing space 5 into a front cavity 51 and a rear cavity 52, a top wall 32 and a supporting wall 33 And the sound emitting monomer 2 is enclosed to form a front cavity 51, and the rear cavity 52 can be used to improve the acoustic performance of the speaker box.

In the above embodiment, as shown in FIGS. 2 and 3, a sound outlet 31 connected to the front cavity 51 is opened on one side of the lower cover 3, and the lower cover 3 further includes a top wall 32 extending from the top wall 32 to the rear cavity 52. The inner wall 34, the speaker box also includes a sealing assembly 4 covering the end of the surrounding wall 34 away from the top wall 32. The surrounding wall 34 is connected to the supporting wall 33. The surrounding wall 34, the supporting wall 33 and the sealing component 4 are enclosed to form a resonance In the cavity 53, the supporting wall 33 is provided with a through hole 335, and the resonant cavity 53 is in communication with the front cavity 51 through the through hole 335.

Specifically, the through hole 335 is directly opposite to the sound hole 31, and the resonant cavity 53 and the front cavity 51 are only connected through the through hole 335, which can effectively increase the cavity volume of the front cavity 51, improve the high-frequency acoustic performance, and reduce The Q value (quality factor value) and sensitivity of the high frequency resonance peak of the speaker box make the acoustic performance of the speaker box better, and the structural design of the surrounding wall 34 can also be more diverse, expanding the scope of application. In addition, the resonant cavity 53 does not occupy the height space of the speaker box, so that the entire speaker box is light and thin. In other embodiments, the resonant cavity 53 can also be arranged on the other two sides of the sounding monomer 2 that are not directly opposite to the sound hole 31. This embodiment is not limited, as long as the resonant cavity 53 can be connected to the front cavity 51. can.

In the above embodiment, as shown in FIG. 5, the supporting wall 33 includes an upper end surface 331 facing the upper cover 1 and an inner wall surface 332 and an outer wall surface 334 respectively extending from both sides of the upper end surface 331 to the top wall 32. The inner wall surface 332 is located at the support The wall 33 is close to the side of the front cavity 51, the outer wall surface 334 is located on the side of the support wall 33 close to the rear cavity 52, the upper end surface 331 is recessed toward the top wall 32 to form a first groove 333, and the first groove 333 extends to the inner wall surface 332. The first groove 333 is arranged along the circumferential direction of the inner ring of the supporting wall 33, and the sounding monomer 2 is fixed on the first groove 333, so that the fixing of the sounding monomer 2 is firmer and the sounding stability of the speaker box is improved.

In addition, as shown in FIGS. 4 and 5, the surrounding wall 34 includes an upper surface 341 facing the upper cover 1 and an inner side surface 342 extending from the side of the upper surface 341 close to the resonant cavity 53 to the top wall, and the upper surface 341 faces the top wall. A second groove 343 is recessed in the 32 direction. The second groove 343 extends to the inner side surface 342. The second groove 343 is arranged along the circumferential direction of the surrounding wall 34. The sealing component 4 is fixed to the second groove 343. The sealing assembly 4 and the second groove 343 can be fixed by glue, so that the sealing assembly 4 and the second groove 343 are fixed more firmly. In addition, the second groove 343 and the first groove 333 communicate with each other.

In the above-mentioned embodiment, the sealing assembly 4 includes a cover plate 41 fixed on the surrounding wall 34 and a gas-permeable spacer 43 arranged above the cover plate 41. The gas-permeable spacer 43 and the cover plate 41 are bonded and fixed by an adhesive layer 42 to seal The assembly 4 is provided with a leakage hole 411 that sequentially penetrates the cover plate 41 and the adhesive layer 42, and the leakage hole 411 communicates with the rear cavity 52 through the air-permeable partition 43. Through the leakage hole 411 on the sealing assembly 4, the resonant cavity 53 is in communication with the rear cavity 52, so that the air pressure inside the speaker box can be balanced. In this embodiment, the leakage hole 411 is opened at the center of the cover 41. Optionally, the adhesive layer 42 is a double-sided adhesive, which makes the adhesion between the air-permeable spacer 43 and the cover plate 41 stronger. In addition, the sealing assembly 4 is integrally processed by die cutting, so that the sealing assembly 4 is not easy to separate and fall off when the sealing assembly 4 is fixed on the second groove 343. The cover plate 41 is made of PET (Polyethylene terephthalate, polyethylene terephthalate) material, which is easy to process and can effectively reduce the resonance peak of the resonant cavity, so that the high-frequency acoustic performance is better. The air-permeable spacer 43 is a mesh cloth (an auxiliary material woven with polyester and polyester as raw materials), and the damping between the resonant cavity 53 and the rear cavity 52 can be adjusted by changing the density of the mesh cloth.

The above are only the embodiments of the present invention. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all belong to the present invention. The scope of protection.

Claims

A speaker box, comprising: an upper cover, a lower cover enclosed with the upper cover to form an accommodating space, and a sound emitting unit accommodated in the accommodating space. The lower cover includes a top wall and a peripheral edge of the top wall. The upper cover extends and surrounds and fixes the side walls of the upper cover, and a support wall that extends from the top wall toward the upper cover into the accommodating space and fixes the sound emitting monomer, the A support wall is arranged around the sounding monomer, the sounding monomer separates the containing space into a front cavity and a rear cavity, and the top wall, the supporting wall and the sounding monomer are enclosed to form the front The cavity is characterized in that the side wall is provided with a sound outlet communicating with the front cavity, and the lower cover further includes a surrounding wall extending from the top wall toward the upper cover into the rear cavity , The speaker box further includes a sealing component covered on an end of the surrounding wall away from the top wall, the surrounding wall is connected to the supporting wall, and the surrounding wall, the supporting wall and the sealing component are enclosed A resonant cavity is formed, the supporting wall is provided with a through hole, the resonant cavity is in communication with the front cavity through the through hole, and the sealing assembly includes a cover plate fixed on the surrounding wall and The air-permeable spacer above the cover plate, the air-permeable spacer and the cover plate are bonded and fixed by an adhesive layer, and the sealing assembly is provided with leakage holes that sequentially penetrate the cover plate and the adhesive layer. The leakage hole communicates with the rear cavity through the air-permeable partition.
The speaker box according to claim 1, wherein the conducting hole is directly opposite to the sound outlet.
The speaker box according to claim 1, wherein the supporting wall comprises an upper end surface facing the upper cover, and an inner wall surface and an outer wall surface respectively extending from both sides of the upper end surface to the top wall, The inner wall surface is located on the side of the support wall close to the front cavity, the outer wall surface is located on the side of the support wall close to the rear cavity, and the upper end surface is recessed toward the top wall to form a first A groove, the first groove extends to the inner wall surface, the first groove is arranged along the circumferential direction of the inner ring of the supporting wall, and the sound emitting monomer is fixed on the first groove.
The speaker box according to claim 3, wherein the surrounding wall includes an upper surface facing the upper cover, and a side of the upper surface close to the resonant cavity extending to the inner side of the top wall. On the side surface, the upper surface is recessed in the direction of the top wall to form a second groove, the second groove extends to the inner side surface, and the second groove is provided along the circumferential direction of the surrounding wall, so The sealing component is fixed to the second groove.
The speaker box according to claim 4, wherein the first groove and the second groove communicate with each other.
The speaker box according to claim 1, wherein the leakage hole is opened in the center of the cover plate.
The speaker box of claim 6, wherein the adhesive layer is double-sided adhesive.
7. The speaker box according to claim 7, wherein the sealing component is integrally processed by die cutting.