Loudspeaker box

Abstract

The invention provides a loudspeaker box. A sound production monomer divides an accommodating space into a front cavity and a rear cavity. A blocking wall divides the rear cavity into a first rear cavity and a second rear cavity. A lower cover comprises a lower cover body, a convex wall, a through hole, a support step and a cover plate. The lower cover body and the convex wall jointly enclose a sound guide groove, and the sound guide groove is communicated with the second rear cavity. The first rear cavity is communicated with the sound guide groove through the through hole. The two supportingsteps are arranged on the two opposite sides of the through hole in a spaced mode. The cover plate completely covers the through hole. The breathable isolation piece is attached to the convex wall and completely covers the sound guide groove, the second rear cavity is filled with sound absorption particles, and the breathable isolation piece encapsulates the sound absorption particles in the second rear cavity to form a virtual sound cavity. Airflow in the first rear cavity bypasses the blocking wall, then sequentially passes through the through hole and the sound guide groove and enters thesecond rear cavity through the breathable isolation piece, and the two supporting steps are located on the two opposite sides, parallel to the airflow flowing direction, of the through hole respectively. Compared with the prior art, the loudspeaker box is excellent in low-frequency acoustic performance.

Description

【Technical Field】 [0001] The invention relates to an electroacoustic device, in particular to a speaker box. 【Background technique】 [0002] With the advent of the mobile Internet era, the number of smart mobile devices continues to rise. Among many mobile devices, mobile phones are undoubtedly the most common and most portable mobile terminal devices. At present, mobile phones have extremely diverse functions, one of which is high-quality music functions. Therefore, speaker boxes for playing sound are widely used in current smart mobile devices. [0003] The speaker box of the related art includes a lower cover, an upper cover assembled with the lower cover to form an accommodating space, a sounding monomer accommodated in the accommodating space, a blocking wall formed in the accommodating space, and air-permeable isolation The sounding monomer and the upper cover enclose a front cavity, the sounding monomer, the upper cover and the lower cover jointly enclose a rear cavity; th...

AI Technical Summary

Problems solved by technology

[0004] However, in the speaker box of the related art, the area of ​​the air-permeable spacer used for air ventilation depends on the size of the through hole, and because the area of ​​the baffle plate is relatively small relative to the second rear cavity, it will participate in the formation of The number of sound-absorbing particles in the virtual cavity is insufficient, which affects the acoustic performance

In addition, the second rear cavity has a long and narrow structure extending away from the sound emitting unit, and it is difficult for the sound-absorbing particles that are easy to be far away from the air-permeable spacer to play an effective role, so that the volume of the virtual acoustic cavity in the second rear cavity changes. Small, which in turn reduces the low frequency acoustic performance of the speaker cabinet

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