Patent ID: 8340337

Claim:
A loudspeaker module comprising: a hollow main body comprising two opposite sidewalls, each of the opposite sidewall defining a first opening, an inner sidewall of the first opening defining an annular rotating slot, the main body further comprising a front cover, a rear cover latched to the front cover, and a top plate substantially perpendicularly connected between the two opposite sidewalls, the front cover and the rear cover cooperatively defining a voice chamber, the top plate defining a second opening, the rear cover comprising an inner sidewall, a plurality of pairs of fastener-receiving portions extending outward from the inner sidewall of the rear cover, the plurality of pairs of fastener-receiving portions disposed on the inner sidewall in the order from the top to the bottom of the main body, each pair of fastener-receiving portions arranged along a line parallel to the lengthwise direction of the main body, each of the fastener-receiving portions defining a first threaded hole; two rotatable connecting portions, one end of the connecting portion extending an annular flange corresponding to the rotating slot, the two rotatable connecting portions rotatably connected to the main body via the flanges received in the rotating slots; two loudspeakers, each of the loudspeakers disposed in an end of the corresponding rotatable connecting portion; and a inverter tube, one end of the inverter tube is received in the voice chamber of the main body and the other end runs through the second opening, the inverter tube comprising a hollow cylindrical tube and two fixed portions respectively formed on the outer sidewall of the hollow cylindrical tube, each of the two fixed portions defining a second threaded hole corresponding to the first threaded hole, wherein two fasteners are employed to assemble the inverter tube and the rear cover together, the length of the inverter tube receiving in the voice chamber can be changed according to the inverter tube fixed on different pairs of fastener-receiving portions.