CN2779515Y

CN2779515Y - Smoke detector

Info

Publication number: CN2779515Y
Application number: CN200520100821.9U
Authority: CN
Inventors: 王荣庆; 叶亦崇
Original assignee: NINGBO LEXING INDUCTOR ELECTRONIC CO Ltd
Current assignee: NINGBO LEXING INDUCTOR ELECTRONIC CO Ltd
Priority date: 2005-03-04
Filing date: 2005-03-04
Publication date: 2006-05-10
Anticipated expiration: 2015-03-04

Abstract

The smoke alarm consists of an upper cover, a middle cover and a lower cover. On the surface of the upper cover, there are indicator lights and test buttons indicating normal operation. An optical path module, an electronic circuit board and an audible alarm are arranged between the middle cover and the upper cover. The module is equipped with a battery lock device in the middle cover to prevent users from installing it by mistake. The practical structure enables the user to know at any time whether the alarm is in a normal working state, and the middle cover cooperates with the curved flue to prevent dirt and dust from entering. Through the built-in buzzer resonance, the sound and light alarm provides users with valuable time and takes various corresponding measures to avoid losses.

Description

Smoke alarm

Technical field

The utility model relates to a kind of architecture advances of optical smoke alarm.

Background technology

Existing optical smoke alarm burns for naked light, the smog that smoulder produced all has the reaction that is exceedingly fast, but it is higher to environmental requirement, foul as environment space, the long-term disperse of dust all can influence its sensitivity and reliability, for keeping optical smoke alarm to have the sensitivity and the high reliability of operate as normal, CN1133461A proposes the solution that a kind of detecting chamber with foul is changed another new detecting chamber, though this kind method can be low with cost, change easy achieving the goal rapidly, but concerning the user, still there are doubt and operating difficulties, therefore are difficult to apply.

Summary of the invention

The purpose of this utility model is the box-like structure of a kind of novel smoke alarm of design, to improve sensitivity, reliability and the applicability of optical smoke alarm.

Design proposal of the present utility model is a smoke alarm, it comprises loam cake, middle cover and lower cover, it is characterized in that being provided with indication pilot lamp working properly and test button at last cap surface, between middle cover and loam cake, establish light path module, electronic circuit board harmony alarm module, in middle cover, be provided with the battery fastening device that prevents user's mistake dress.

Above-mentioned design remarkable advantage is to make the user can learn at any time whether alarm is in normal operating conditions, this is because last cap surface is provided with pilot lamp, it when product is not reported to the police with per

minute

1 or 2 times flicker, show the circuit operate as normal, can the test button can be tested smoke alarm and report to the police, pin the test button, alarm sends the chimes of doom simulation and reports to the police.Prevent that by battery fastening device the user from not installing and using when packing battery into.Before fire takes place, send chimes of doom by built-in hummer, provide the quality time, take various corresponding measures to avoid loss to the user.

Description of drawings

Fig. 1 is a superstructure, and wherein 1-A looks for the loam cake master, and 1-B is the loam cake backsight, 1-C loam cake master parallax stereogram.

Fig. 2 is the middle cover structure, and wherein 2-A looks for the middle cover master, and 2-B is the middle cover backsight, 2-C middle cover master parallax stereogram.

Fig. 3 is the lower cover structure, and wherein 3-A looks for the lower cover master, and 3-B is the lower cover backsight.

Fig. 4 is the general assembly synoptic diagram.1 is loam cake among the figure, and 2 is middle cover, and 3 is lower cover, and 4 is buckle, and 5 is wiring board, and 6 is the light path module, 7 is piezo, and 8 is spring, and 9 is hole clipping, and 10 is snap close, and 11 is battery contact, 12 is battery, and 13 are the sympathetic response window, and 14 is lockhole, and 15 is battery case, and 16 are the test button.

Fig. 5 is a circuit diagram.

Embodiment

The utility model is formed the cylinder box by loam cake 1, middle cover 2 and lower cover 3, is provided with light path module 6, electronic circuit board 3 and sound alarm module between last, middle cover.Referring to Fig. 5, light path module 6 comprises 6 pin infrared-emitting diode D1 that meet IC and the 3 pin reception diode D2 that are connected to IC1, and infrared emission is made up of 6 pin of triode Q1, light emitting diode D1, resistance R 12, R13 and capacitor C 5 and IC.Infrared reception is made up of 3 pin of diode D2, resistance R 11 potentiometer W and IC.The warning buzz circuit is made up of 9,10 pin of Vib. B, resistance R 4, R5 and capacitor C 6 and IC.Test circuit is made up of 16 pin of button SW and IC.The low-voltage warning circuit is made up of 15 pin of R6, R7 and IC.

When smog enters, between the middle cover time, make infrared transmitting tube send infrared light and become diffused light, and an one of making these diffused lights is received the device reception and becomes current signal by photoelectric commutator and electronic circuit, this current signal enters the operational amplifier of IC circuit by 3 pin of IC, after amplification converts voltage signal to through high-gain, form the comparative voltage signal with IC internal fixation voltage, the alerting signal output alarm module that detects makes the piezo vibration emit alarm sound.16 pin of IC circuit are the test pin, button 16 input trigger pips, the voltage signal of the input voltage signal of 15 pin and the storage of 4 pin is made comparisons and the output LOW voltage alerting signal, alarming logic computing module output simulation chimes of doom, the pilot lamp LED of 11 pin every flicker in 0.5 second once, expression is reported to the police working properly, and pilot lamp every flicker in 35 seconds is once represented alert status on the alert.

Structure is partly referring to Fig. 1-Fig. 4, and (as Fig. 1-C) be fixed in the loam cake, the small end of spring 8 is enclosed within on the pillar of loam cake 1 piezo 7.Snap close 10 (as Fig. 2) is depicted as L shaped, and itself has elasticity.Battery fastening device comprises the spring 8 of being located at loam cake 1 and the snap close 10 of being located at middle cover 2, and snap close upper end edge battery case 15 walls pass the surface of

lower cover

3, and 10 times transverse planes of snap close hold mutually with the big end of spring 8.The hole clipping 9 of the buckle 10 corresponding middle covers 2 on the loam cake 1 is closed tightly, and the piezo 7 in the piezo contact chip on the electronic circuit board 5 and the loam cake 1 contacts.Spring 8 in the loam cake 1 touches the elasticity of the snap close 10 increase snap closes in the middle cover 2.Test button 16 is aimed at the reliability that the button SW on the wiring board is used to test alarm on the last cap surface.Cover tight back upward, and form alarm body, acoustic alarm device module comprises sympathetic response window of being located in the loam cake 1 13 and the hummer of being located under the middle cover 27, main body is incorporated into down snap close 10 needs aim at the lockhole 14 of lower cover 3 when covering, in the battery case 15 not during packed battery snap close 10 to be stuck in lower cover lockhole 14 interior and main body can not be tightened on down cover.In battery 12 was packed battery case 15 into, snap close 10 was pressed down and can not be blocked by lower cover lockhole 10, and main body just can be tightened on down and cover like this.

Claims

1. Smoke alarm, which includes an upper cover, a middle cover and a lower cover. An optical path module (6), an electronic circuit board (5) and an audible alarm module are arranged between the covers (2), and a battery locking device for preventing users from installing them by mistake is arranged in the middle cover.

2. The smoke alarm according to claim 1, characterized in that the optical path module (6) includes an LED diode D1 connected to the 6-pin input of the IC and a receiving diode D2 connected to the 3-pin of the IC.

3. The smoke alarm according to claim 1, characterized in that the battery locking device includes a spring (8) provided on the upper cover (1) and a lock (10) located in the middle cover (2), the lock Buckle (10) is L-shaped, and its upper end passes lower cover (3) surface along battery case (15) wall, and the big end of lock buckle (10) lower end plane and spring (8) supports.

4. The smoke alarm according to claim 1, characterized in that the sound alarm module includes a resonance window (13) located in the upper cover (1) and a buzzer (7) located under the middle cover (2) Corresponding.

5. The smoke alarm according to claim 1, characterized in that the test circuit is composed of the button SW and 16 pins of the IC.

6. The smoke alarm according to claim 1, characterized in that the low voltage alarm circuit is composed of R6, R7 and pin 15 of IC.