Portable sound box

Abstract

The utility model discloses a portable sound box, which comprises a loudspeaker single body and a capacity expansion shell, the capacity expansion shell comprises a plurality of nested bodies which are sequentially and movably nested together from inside to outside, a window communicated with an inner cavity of the capacity expansion shell is arranged on the nested body positioned in the center, and the loudspeaker single body is mounted at the window; in every two adjacent nested bodies, the bottom of the nested body located on the inner ring is provided with a lower limiting ring extending outwards, the top of the nested body located on the outer ring is provided with an upper limiting ring extending outwards, the outer diameter of the lower limiting ring is larger than the inner diameter of the upper limiting ring, and an annular sealing piece is arranged between the lower limiting ring and the upper limiting ring. When the two adjacent nested bodies are in an unfolded state, the annular sealing pieces abut against the lower limiting ring and the upper limiting ring respectively, and the annular sealing pieces are made of rubber. And the rubber is used as the annular sealing element, so that the use frequency of the expansion shell can be increased, and the portable sound box can still keep good air tightness after being used for a long time.

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