Patent ID: 9173019
Filing Date: 2015-10-27
Classification: H04R

Abstract:
1. A loudspeaker, comprising: a circuit board comprising a plurality of first electromagnets mounted on a front surface of the circuit board, and a second electromagnet mounted on a rear surface of the circuit board; a base mounted at a rear side of the circuit board; a positioning apparatus slidably installed between the circuit board and the base, and comprising a magnetic plate aligning with the second electromagnet, and a plurality of resilient members sandwiched between the positioning apparatus and the circuit board; a sound-reflecting member positioned at a front side of the circuit board, and comprising a sound-reflecting plate and a plurality of magnetic pieces extending rearward from a circumference of the sound-reflecting plate and aligned with the first electromagnets; a connecting member connected between the base and the sound-reflecting member, and comprising a rotating portion rotatably connected to the base; a sound generator mounted to the sound-reflecting member; and a controller electrically coupled to the plurality of first electromagnets and the second electromagnet; wherein the resilient members bias the positioning apparatus to engage with the rotating portion of the connecting member, the controller controls the second electromagnet to attract the magnetic plate, to allow the positioning apparatus to slide and detach from the rotating portion of the connecting member, and the controller controls one or more of the first electromagnets to attract the corresponding one or more magnetic pieces, to allow the sound-reflecting member and the connecting member to swing, and thereby to adjust an angle between the sound-reflecting member and the circuit board.