WO2022000541A1

WO2022000541A1 - Loudspeaker box

Info

Publication number: WO2022000541A1
Application number: PCT/CN2020/101475
Authority: WO
Inventors: 李红; 刘海林; 王武
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: 2020-06-29
Filing date: 2020-07-10
Publication date: 2022-01-06
Also published as: CN212486709U

Abstract

The present utility model provides a loudspeaker box. The loudspeaker box comprises a housing and a sound production unit; the housing has an accommodating space; the sound production unit is accommodated in the accommodating space and partitions the accommodating space into a front cavity and a rear cavity; the rear cavity comprises a first rear cavity and a second rear cavity; the second rear cavity is filled with sound absorption particles; sound absorption members capable of blocking the movement of the sound absorption particles project from the inner side surface defining the second rear cavity. The sound absorption members located in the second rear cavity project from the inner side surface of the housing, so that the sound absorption members can block the movement of the sound absorption particles, thereby further reducing the change of the lowest resonance frequency (F0) caused by abrasion of the sound absorption particles, and thus effectively improving the acoustic performance of the loudspeaker box having a long virtual acoustic cavity.

Description

speaker box

technical field

The utility model relates to the field of sound and electricity, in particular to a speaker box.

Background technique

In order to improve the low-frequency acoustic performance of the speaker box, sound-absorbing particles are usually filled in the auxiliary sound cavity of the speaker box to form a D-BASS virtual sound cavity.

technical problem

However, when the length of the D-BASS virtual acoustic cavity is long, the study found that after long-term power experiments (above 48H), the vigorous movement of the sound-absorbing particles (bass) will cause serious wear of the sound-absorbing particles (bass) particles, resulting in the lowest resonance frequency (F0). The huge change of , the amplitude is reduced, the capacity expansion effect is lost, the low frequency performance is reduced, and the power consumption of the whole machine becomes higher when it is installed in a mobile terminal.

Therefore, there is a need to provide a speaker enclosure that slows the movement of sound absorbing particles (bass) and reduces wear to the bass particles.

technical solutions

The purpose of the utility model is to provide a loudspeaker box to solve the technical problem of serious abrasion of bass particles caused by the violent movement of the bass.

The technical scheme that one of the purposes of the present utility model provides is as follows:

A loudspeaker enclosure comprising:

a casing, the casing has a receiving space;

A sounding unit is accommodated in the accommodating space, and the sounding unit divides the accommodating space into a front cavity and a rear cavity;

The rear cavity has a first rear cavity and a second rear cavity, the second rear cavity is filled with sound-absorbing particles, and the inner side of the second rear cavity is provided with an inner surface that can resist the movement of the sound-absorbing particles. Broken sound-absorbing pieces.

Further, the second rear cavity is in the shape of a long strip, and the number of the sound-absorbing members is set to one,

The sound absorbing member is centrally arranged along the length direction of the second rear cavity.

Further, the second rear cavity is in the shape of a long strip, and there are at least two sound absorbing members, and at least two of the sound absorbing members are distributed at intervals along the length direction of the second rear cavity.

Further, the sound-absorbing member is block-shaped and is flatly attached to the inner side of the casing.

Further, the second rear cavity is elongated, and the sound absorbing member extends along the width direction of the second rear cavity.

Further, the housing includes an upper cover and a lower cover that is enclosed with the upper cover to form the receiving space, the sounding unit and the upper cover enclose the front cavity, the sounding unit, the lower cover The back cavity is formed together with the upper cover, and the speaker box further includes a ventilating isolation component and a blocking wall extending from the upper cover to the lower cover, the ventilating isolation component is fixed on the blocking wall and is connected with the The retaining wall jointly divides the rear cavity into the first rear cavity and the second rear cavity, the upper cover is provided with a through groove penetrating the upper cover corresponding to the second rear cavity, and the upper cover The cover further includes a cover plate connected to the through groove, and the sound absorbing member is fixed on a surface of the cover plate facing the second rear cavity.

Further, the cover plate is disposed opposite to the air-permeable isolation component, and the sound-absorbing member is disposed at intervals from the air-permeable isolation component.

Further, the upper cover includes a bottom plate and a side plate extending from an edge of the bottom plate to the lower cover, the through groove is formed in the bottom plate, and the sound absorbing member is arranged at intervals from the side plate.

Further, a powder filling hole is opened on the cover plate.

Further, the sound-absorbing member is sound-absorbing cotton.

beneficial effect

The beneficial effect of the utility model is that: by filling the second rear cavity with sound-absorbing particles (not shown in the figure), the second rear cavity forms a D-BASS virtual sound cavity, so as to improve the acoustic performance of the speaker box. When the length of the second rear cavity is long, a sound absorbing member located in the second rear cavity is protruded through the inner side of the casing, and the sound absorbing member can block the movement of the sound absorbing particles, The change of the lowest resonant frequency (F0) caused by the wear of sound-absorbing particles is further reduced, thus effectively improving the acoustic performance of the speaker box with a longer virtual sound cavity.

Description of drawings

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

Fig. 2 is an exploded view of the loudspeaker box in Fig. 1;

Fig. 3 is a sectional view along line A-A in Fig. 1;

4 is a schematic structural diagram of the speaker box in FIG. 1 with a lower cover removed;

FIG. 5 is a cross-sectional view along A-A of FIG. 1 in another embodiment.

In the picture:

100. Speaker box; 1. Shell; 10. Receiving space; 2. Sound producing unit; 101. Front cavity; 102. Rear cavity; 1021, First rear cavity; 1022, Second rear cavity; 11. Upper cover; 12. Lower cover; 4. Breathable isolation assembly; 13. Retaining wall; 111. Bottom plate; 112. Side plate; 110. Through groove; 113. Cover plate; .

Embodiments of the present invention

The present utility model will be described in detail below with reference to FIGS. 1 to 5 .

Please refer to FIG. 1 to FIG. 5 , an embodiment of the present invention provides a speaker box 100, including:

a housing 1 having a housing space 10, the housing 1 having a housing space 10;

The sounding unit 2 is accommodated in the accommodating space 10. The sounding unit 2 divides the accommodating space 10 into a front cavity 101 and a rear cavity 102; the rear cavity 102 has a first rear cavity 1021 and a second rear cavity 102. The second rear cavity 1022 is filled with sound-absorbing particles, and the inner side of the second rear cavity 1022 is protruded with a sound-absorbing member 3 that can block the movement of the sound-absorbing particles.

By filling the second rear cavity 1022 with sound-absorbing particles (not shown in the figure), since the sound-absorbing particles have a porous structure and high specific capacity, the air in the second rear cavity 1022 can be adsorbed, and the air compliance can be improved, thereby achieving The low-frequency resonance frequency of the speaker box 100 is lowered, thereby improving the low-frequency performance, so as to improve the low-frequency acoustic performance, so that the second rear cavity 1022 forms a D-BASS virtual sound cavity to improve the bass effect. When the length of the second rear cavity 1022 is relatively large, by protruding the sound absorbing member 3 located in the second rear cavity 1022 on the inner side of the casing 1, the sound absorbing member 3 can perform the movement of the sound absorbing particles. Blocking, thereby reducing the wear caused by the vigorous movement of the sound-absorbing particles, and further reducing the change of the minimum resonance frequency (F0) caused by the wear of the sound-absorbing particles. Generally, the minimum resonance frequency (F0) can be reduced by 10-30HZ. Therefore, effective The acoustic performance of the speaker cabinet 100 with a longer virtual sound cavity length is improved.

Preferably, the second rear cavity 1022 is elongated, and the number of the sound absorbing members 3 is one. Preferably, when the length of the first rear cavity 1021 is greater than 10 mm and less than 20 mm, the number of the sound absorbing members 3 is set to one.

Preferably, when there is one sound absorbing member 3 , the sound absorbing member 3 is centrally arranged along the length direction of the second rear cavity 1022 . In this way, the size of the space on both sides of the sound absorbing member 3 and the number of sound absorbing particles on both sides are equivalent, the motion blocking effect of the sound absorbing particles on both sides of the sound absorbing member 3 is equivalent, and the motion blocking effect on the sound absorbing particles is better.

Preferably, the second rear cavity 1022 is elongated, the number of the sound absorbing members 3 is provided, and the two sound absorbing members 3 are spaced apart along the length direction of the second rear cavity 1022 . In the same way, it is better to block the movement of the sound-absorbing particles. Preferably, when the length of the first rear cavity 1021 is greater than 20 mm and less than 30 mm, there are two sound absorbing members 3 .

Preferably, the sound absorbing member 3 is block-shaped and flatly attached to the inner side of the housing 1 .

Preferably, the second rear cavity 1022 is elongated, and the sound absorbing member 3 extends along the width direction of the second rear cavity 1022 . Generally, the sound-absorbing particles are more likely to move along the length direction of the second rear cavity 1022, and in this way, the effect of blocking the movement of the sound-absorbing particles is better, thereby reducing the wear of the sound-absorbing particles.

Preferably, the casing 1 includes an upper cover 11 and a lower cover 12 that is enclosed with the upper cover 11 to form the receiving space 10 . The sounding unit 2 and the upper cover 11 enclose the front cavity 101 . The sound-generating unit 2, the lower cover 12 and the upper cover 11 together form a rear cavity 102. The speaker box 100 further includes a ventilating isolation component 4 and a blocking wall 13 extending from the upper cover 11 to the lower cover 12, so The ventilating isolation component 4 is fixed to the blocking wall 13 and together with the blocking wall 13 divides the rear cavity 102 into the first rear cavity 1021 and the second rear cavity 1022, and the upper cover 11 corresponds to The second rear cavity 1022 defines a through groove 110 penetrating the upper cover 11 . The upper cover 11 further includes a cover plate 113 which is connected to the through groove 110 , and the sound absorbing member 3 is fixed to the cover. The plate 113 faces the side of the second rear cavity 1022 .

Preferably, the cover plate 113 is disposed opposite to the air-permeable isolation assembly 4 , and the sound-absorbing member 3 is disposed at an interval from the air-permeable isolation assembly 4 . There is a gap between the sound-absorbing member 3 and the ventilation isolation component 4, which is conducive to air circulation, so as to avoid blocking the air circulation due to the setting of the sound-absorbing member 3, so that the sound-absorbing member 3 can block the movement of the sound-absorbing particles without affecting the air circulation. Guaranteed bass effect.

Preferably, the upper cover 11 includes a bottom plate 111 and a side plate 112 extending from the edge of the bottom plate 111 to the lower cover 12 . The plates 112 are arranged at intervals. Similarly, there is a gap between the sound-absorbing member 3 and the side plate 112, which is conducive to air circulation, so as to avoid blocking the air circulation due to the setting of the sound-absorbing member 3, so that the sound-absorbing member 3 can block the movement of the sound-absorbing particles without affecting the air. flow, to ensure the bass effect.

Preferably, the cover plate 113 is provided with a powder filling hole 1130 . The sound-absorbing particles are loaded into the second rear cavity 1022 through the powder filling hole 1130 , and the speaker box 100 further includes a sealing cover 1131 covering the powder filling hole 1130 .

Preferably, the sound-absorbing member 3 is sound-absorbing cotton.

The above are only the embodiments of the present invention. It should be pointed out 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 belong to the present invention. The scope of protection of the utility model.

Claims

A speaker box, characterized in that, comprising:

a casing, the casing has a receiving space;

A sounding unit is accommodated in the accommodating space, and the sounding unit divides the accommodating space into a front cavity and a rear cavity;

The rear cavity has a first rear cavity and a second rear cavity, the second rear cavity is filled with sound-absorbing particles, and the inner side of the second rear cavity is provided with an inner surface that can resist the movement of the sound-absorbing particles. Broken sound-absorbing pieces.
The loudspeaker box according to claim 1, wherein the second rear cavity is in the shape of a long strip, the number of sound absorbing members is one, and the sound absorbing member is centrally arranged along the length direction of the second rear cavity .
The speaker box according to claim 1, wherein the second rear cavity is in the shape of a long strip, the number of the sound absorbing members is at least two, and the at least two sound absorbing members are arranged along the second rear cavity distribution in the lengthwise direction.
The loudspeaker box according to claim 1, wherein the sound-absorbing member is block-shaped, and is flatly attached to the inner side surface of the housing.
The speaker box according to claim 1, wherein the second rear cavity is elongated, and the sound absorbing member extends along the width direction of the second rear cavity.
The speaker box according to claim 1, wherein the casing comprises an upper cover and a lower cover which is enclosed with the upper cover to form the receiving space, and the sound-emitting unit and the upper cover enclose the The front cavity, the sounding unit, the lower cover and the upper cover together form the rear cavity, the speaker box further includes a ventilation isolation component and a blocking wall extending from the upper cover to the lower cover, the ventilation The isolation component is fixed on the retaining wall and together with the retaining wall divides the rear cavity into the first rear cavity and the second rear cavity, and the upper cover has a through hole corresponding to the second rear cavity. In the through groove of the upper cover, the upper cover further includes a cover plate connected to the through groove, and the sound absorbing member is fixed on the surface of the cover plate facing the second rear cavity.
The speaker box according to claim 6, wherein the cover plate is arranged opposite to the air-permeable isolation component, and the sound-absorbing member is arranged at an interval from the air-permeable isolation component.
The speaker box according to claim 6, wherein the upper cover comprises a bottom plate and a side plate extending from the edge of the bottom plate to the lower cover, the through groove is opened in the bottom plate, and the sound absorbing The piece is spaced apart from the side plate.
The speaker box according to claim 6, wherein a powder filling hole is opened on the cover plate.
The speaker box according to claim 1, wherein the sound-absorbing member is sound-absorbing cotton.