Earthquake alarm with ringtone and voice double functions

• Main Authors: MAO FANGYUAN, DING XIHE, XU ZHAOJUN, JIANG YIWEN, GUI YONGFANG, CHENG ZHENYANG, TU QIAOAN
• Format: Patent
• Language: Chinese; English
• Published: 19.01.2011
• Subjects: ALARM SYSTEMS; ORDER TELEGRAPHS; PHYSICS; SIGNALLING; SIGNALLING OR CALLING SYSTEMS

The invention discloses an earthquake alarm with ringtone and voice double functions. When an earthquake happens, a house shakes and drives the earthquake alarm which is connected with a ceiling by a rigid rod to shake while a suspension plummet which is hung on the ceiling in a suspension way by a flexible rope oscillates; and due to the different amplitudes of oscillation of the earthquake alarm and the suspension plummet, the suspension plummet hung by the flexible rope in a suspension way and a convex spherical face in the alarm move relatively, the suspension plummet drives a steel ball to roll down from the top of a guide rail of the convex spherical face into an circular groove of a connection plate first, a ringtone alarm circuit is turned on, a direct current motor is started to drive a reducer to rotate and a ratchet on an output shaft to rotate, so that an oscillating pawl and a plummet are driven to oscillate to strike a bell to give an mechanical alarm. When the steel ball rolls down from the top