Patent ID: 9686614
Date: 2017-06-20
CPC Classifications: H04R

Claim:
1. An electro-acoustic device, comprising: a frame; a magnetic circuit received in the frame and including a lower plate fixed on a bottom of the frame and a magnet attached on the lower plate, the lower plate having a bottom plate and a side plate extending toward the vibrating diaphragm on both sides of the bottom plate, the side plate attached to an inner wall of the frame, each of the sides of the bottom plate provided with a first notch located at the center of both sides of the bottom plate; a vibration system received in the frame and including a vibrating diaphragm attached to a top of the frame; a cavity formed cooperatively by the lower plate, the frame and the vibrating diaphragm; a side wall of the frame provided with a second notch corresponding to the first notch for forming a leaking hole cooperatively, the leaking hole provided between the frame and the lower plate for communicating with outside of the electro-acoustic device; a pit located at two ends of the bottom plate and surrounding the first notch; a damper installed inside the pit of the lower plate and covering the leaking hole internally; the damper having a first part having a lower surface attached to the pit and a second part covering the leaking hole, and an upper surface of the second part attaches to the bottom of the frame.