Application Number: 00108208
Application Date: 2000.04.28
Publication Number: 1277532
Publication Date: 2000.12.20
Priority Information: 1999/6/10 KR 21555/1999
International: H04S3/00
Applicant(s) Name: Samsung Electronics Co., Ltd.
Address:
Inventor(s) Name: Kim Sangwook;Kim Duhyong;Seo Rangsok
Patent Agency Code: 11038
Patent Agent: yang guoxu
Abstract To excellently perform reproduction to an ultra high-pitch sound by a simple structure by connecting and fixing one of the electrodes of a piezoelectric element to a frame so as to make the piezoelectric element movable to the frame. The frame 102 supports the entire piezoelectric element 101 by fixing and supporting the peripheral edge of the piezoelectric element 101 through an air-core coil 2 and supports the entire cone diaphragm 1 by connecting and supporting the peripheral edge of the cone diaphragm 1 through an elastic member 3. Since the peripheral edge of the piezoelectric element 101 is fixed to and supported on the frame 102 through the air-core coil 2, the mass of the piezoelectric element 101 is fixed to and supported on the frame 102 through the air-core coil 2 while the cone diaphragm 1 is vibrating, and thus the mass of a vibration system becomes equal to the mass of the cone diaphragm 1. Thus, a high-pitch limit frequency is raised, the mass of the vibration system becomes smaller because it is equivalent to the mass of the piezoelectric element 101, a sound pressure level is raised and the high-pitch limit side of a reproducing frequency band is enlarged.