Low-cost and high-reliability manual fire alarm button and using method thereof

Abstract

The invention relates to a low-cost and high-reliability manual fire alarm button and a using method thereof. The manual fire alarm button comprises a mounting box, a pressing cover movably connectedwith the mounting box, and a PCBA located in the mounting box. The mounting box is provided with a pressing groove corresponding to the pressing cover; the PCBA comprises a CPU, a transmitting tube and a receiving tube which are paired, and a bare board fixed to the mounting box; the CPU, the transmitting tube and the receiving tube are all fixed to the bare board; the transmitting tube and the receiving tube are electrically connected with the CPU; the transmitting tube and the receiving tube both face the pressing cover; the position, closest to the pressing groove, of the pressing cover isrecorded as a first position, and the position, farthest from the pressing groove, of the pressing cover is recorded as a second position; the pressing cover is provided with a reflection position which reflects light emitted by the transmitting tube to the receiving tube when the pressing cover is located at the first position and / or the second position. The improved manual fire alarm button is simple in structure, low in cost and low in false alarm rate.

Description

technical field [0001] The invention relates to the technical field of buttons, more specifically, to a low-cost, high-reliability manual fire alarm button and a use method thereof. Background technique [0002] When a fire occurs, the on-site personnel can send a fire alarm signal to the fire alarm controller by pressing the manual fire alarm button to link the fire prevention and fire extinguishing facilities in the building; therefore, the manual fire alarm button can transmit the fire alarm signal truly and accurately. extremely important. At present, the usage of the manual fire alarm button is as follows: [0003] One is to use the tact switch as the trigger, and the movable end of the tact switch is exposed in the air. However, dust, water vapor, and salt in the environment will have a negative impact on the tact switch, especially in southern cities with a humid climate. The main reason is that the distance between the positive metal contact and the negative metal ...

AI Technical Summary

Problems solved by technology

[0003] One is to use the tact switch as the trigger, and the movable end of the tact switch is exposed in the air. However, dust, water vapor, and salt in the environment will have a negative impact on the tact switch, especially in southern cities with a humid climate. The main reason is that the distance between the positive metal contact and the negative metal contact of the light touch switch is relatively close. When the air contains high water vapor and salt, air discharge is easy to form between the two contacts. If things go on like this, the light touch switch will be corroded and damaged. Cause the function of the manual fire alarm button to fail;

[0004] The second is to use a waterproof button, add a silicone protective cover around the button, seal the trigger by sealing wax or pressing, and make a larger shell to completely seal the PCBA board, so as to ensure that the manual fire alarm button can continue to work normally. work, but the above-mentioned methods are all costly, and the assembly is complicated and the production efficiency is low;

[0005] The third is to use the infrared emitting tube and the infrared receiving tube as switches. When the baffle blocks the infrared emitting tube and the infrared receiving tube, the optical signal is interrupted and an alarm is triggered. In this way, if foreign objects (such as insects) enter, false alarms are likely to occur , causing confusion

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