Terminal alarming device of alarm system

Abstract

The invention relates to an alarm system of a high-rise building. A terminal alarm device of the alarm system is as follows: a horn is arranged at the upper end of a supporting seat of a control circuit and outputs an alarm sound signal; a sounding device in the horn is electrically connected with the output end of the control circuit; a conical sound guide nozzle positioned above the sound part of the sounding device is arranged on the end surface of the horn; a superposition sound cavity is arranged at the upper end of the horn and covers the horn and the upper part of the supporting seat of the control circuit; the superposition sound cavity is fixedly connected with a seat through screws; the inner top wall of the superposition sound cavity is a concave arc-shaped surface; a sound guide cavity is arranged at the centre of the inner top wall of the superposition cavity; the conical sound guide nozzle of the horn and the sound guide cavity are in clearance fit; a space is arranged between the upper end surface of the horn and the inner top wall of the superposition sound cavity; and a plurality of sound extension openings are distributed on the side wall of the superposition cavity and penetrate the inner wall and the outer wall of the superposition cavity. The alarm system can strengthen the output alarm sound pressure and require less electric current.

Description

technical field [0001] The invention relates to an alarm device of an alarm system, in particular to a terminal alarm device of the alarm system. Background technique [0002] Today's terminal alarms have a wide variety of generators, including piezoelectric ones and loudspeakers. Piezoelectric generators have the advantages of high frequency, narrow frequency band, low current consumption, and stable sound at high frequencies; however, due to the small area of ​​the piezoelectric sheet and the characteristics of the silver layer, the sound pressure emitted is low, making it difficult to achieve high-pitched sound. The purpose of pressure alarm. The generator of the loudspeaker has a wide frequency band and can generate high sound pressure, but the area of ​​the diaphragm is relatively large, the required energy is high, and a large amount of current is consumed. In addition, the horn is also a kind of speaker. Although the horn has high power and high efficiency, it is bu...

AI Technical Summary

Problems solved by technology

Piezoelectric generators have the advantages of high frequency, narrow frequency band, low current consumption, and stable sound at high frequencies; however, due to the small area of ​​the piezoelectric sheet and the characteristics of the silver layer, the sound pressure emitted is low, making it difficult to achieve high-pitched sound. The purpose of pressure alarm

The generator of the speaker has a wide frequency band and can generate high sound pressure, but the area of ​​the diaphragm is too large, the energy required is high, and a large amount of current is consumed

In addition, the horn is also a kind of speaker. Although the horn has high power and high efficiency, it is bulky and consumes a lot of current, and the sound transmission loss in the horn is large, resulting in a low final output alarm sound pressure.

In addition, many of today's voice-activated alarms are separated from the flashlight and require additional wiring to connect, which not only increases the cost, but also consumes a lot of power and current

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