speaker box

Abstract

The invention provides a loudspeaker box. The sounding unit divides the storage space into a front cavity and a rear cavity, and a retaining wall separates the rear cavity into a first rear cavity and a second rear cavity. The lower cover includes a lower cover body, a convex wall, The through hole, the support step and the cover plate, the lower cover body and the convex wall together form a sound guide groove, and the sound guide groove communicates with the second back cavity; the through hole connects the first back cavity with the sound guide groove; the distance between the two support steps It is arranged on opposite sides of the through hole; the cover plate completely covers the through hole; the air-permeable spacer fits on the convex wall and completely covers the sound guide groove, the second rear cavity is filled with sound-absorbing particles, and the air-permeable spacer encapsulates the sound-absorbing particles In the second rear cavity to form a virtual acoustic cavity; the airflow in the first rear cavity bypasses the blocking wall and then passes through the through hole and the sound guide groove and enters the second rear cavity through the breathable spacer. The two supporting steps are respectively located in the channel The holes are parallel to opposite sides of the direction of airflow flow. Compared with related technologies, the speaker box of the present invention has excellent 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 the many mobile devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. At present, the functions of mobile phones are extremely diverse, one of which is the function of high-quality music. Therefore, speaker boxes for playing sound are widely used in current smart mobile devices. [0003] The speaker box in the related art includes a lower cover, an upper cover that is combined with the lower cover to form a storage space, a sounding unit accommodated in the storage space, a barrier wall formed in the storage space, and a ventilation isolation parts; the sounding unit and the upper cover form a front cavity, and the sounding unit, the upper cover and the lower cover together form a rear cavity;...

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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