CN2118012U

CN2118012U - Pictographic doze alarm

Info

Publication number: CN2118012U
Application number: CN 92210034
Authority: CN
Inventors: 吴立仁
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-12-29
Filing date: 1991-12-29
Publication date: 1992-10-07

Abstract

The utility model provides an in the sound component, whole discrete component is integrated in a little printed circuit board, therefore this siren reports an emergency and asks for help or increased vigilance the volume greatly, small in size, the appearance is pleasing to the eye.

Description

Pictographic nap alarm

The utility model relates to a kind of pictograph drowsy alert device of drowsiness when being used to prevent chaufeur work.

Existing drowsy alert device complex structure, volume are big, use inconvenient.Utility model patent communique (No. 40 volume two of 88 years 4 volumes) discloses the patent application that a kind of name is called " sleepy detainer ", application number 86201180, its structure is to adopt mercury switch to make sleepy signal pickup, piezoelectric ceramic piece is made sounding component, because the alarm call that piezoelectric ceramic piece sends is too little, this detainer has to increase by one can send electric pulse with the sleepy circuit of preventing of the pressure that stimulates human body skin.

The purpose of this utility model is exactly to provide a kind of small and exquisite drowsy alert device of profile with voice amplification function in order to solve above-mentioned the deficiencies in the prior art.

The purpose of this utility model is achieved in that picking up of the sleepy signal that utilizes mercury switch to make the driver drowsy state, bed plate makes the pictograph structure, after the resonant cavity lid closes up with bed plate, form the inner hermetization resonance chamber body at " resembling head " position, sounding component piezoelectric ceramic piece as warning signal is stuck in the resonant cavity, and the alarm call that amplifies through resonant cavity imports chaufeur Er Nei into by resonant cavity overhanging trunk shape pipeline and a part of plastic cement pipe that inserts pipeline.In order further to reduce volume, whole separating components of warning circuit are integrated in the printed circuit board (PCB).

The utility model has following advantage compared to existing technology: 1, defeated sound pipeline double as hangers hook in the trunk shape has made full use of space and material; 2, alarm call (30dB is following) spreads out of after amplifying through resonant cavity again, makes this sound (88dB) be enough to wake up the chaufeur in the drowsiness; 3, owing to compact conformation, volume is small and exquisite, and very light in weight (14g) is not so the user has uncomfortable sensation.

Be further described in conjunction with the embodiments below by accompanying drawing:

Fig. 1 is the constructional drawing of pictograph drowsy alert device;

Fig. 2 is common warning circuit schematic diagram;

The integrated schematic circuit diagram that Fig. 3 adopts for this siren horn;

Fig. 4 is the YH-1 printed circuit board (PCB) enlarged drawing of circuit integration section;

Fig. 5 is covering plate structure figure.

As shown in Figure 1, mercury switch ［ 9 ］ is placed on the sponge ［ 8 ］, and withstand with set screw ［ 10 ］ on its top, and utilizing set screw ［ 10 ］ scalable user's head mercury switch behind the inclination certain angle ［ 9 ］ of bowing is that switch on is reported to the police.Switch ［ 7 ］ is a source switch.Battery ［ 4 ］ connects switch ［ 7 ］ and mercury switch ［ 9 ］ respectively by positive plate ［ 6 ］ and negative plate ［ 5 ］.Inductance ［ 2 ］ inserts surface-mounted integrated circuit ［ 3 ］, circuit card ［ 3 ］ has two lines to insert the two poles of the earth of piezoelectric ceramic piece ［ 13 ］, piezoelectric ceramic piece ［ 13 ］ is stuck in " resembling head " resonant cavity, and the bonding back of bed plate ［ 12 ］ and resonant cavity lid ［ 14 ］ forms resonant cavity.The part of plastic cement pipe ［ 15 ］ is inserted among the resonant cavity overhanging " trunk ".Cover plate ［ 1 ］ is connected with bed plate ［ 12 ］ by screw.Fig. 3 circuit has been cancelled the capacitor C among Fig. 2, and mercury switch is selected the PZ type for use, and piezoelectricity singing piece is φ 20mm, and inductance is 26mH, BG ₁Pipe is 2SC9013 or 30G6, R ₁274K Ω, R ₂47K Ω.

Claims

1, a kind of pictograph drowsy alert device of drowsiness when being used to prevent chaufeur work, it mainly is made up of mercury switch, resonant cavity lid, bed plate, cover plate, piezoelectricity singing piece, plastic cement pipe, integrated circuit chip, battery, inductance, switch and positive/negative plate, mercury switch is made the pick-up of sleepy signal, it is characterized in that:

A, resonant cavity lid constitute the inner hermetization resonance chamber body with bed plate, as sound intensifier;

The part of b, plastic cement pipe is inserted in the overhanging trunk shape pipeline of inner hermetization resonance chamber, as interior defeated sound pipeline;

C, piezoelectricity singing piece are stuck in the inner hermetization resonance chamber body.

2,, it is characterized in that whole breakaway-elements of circuit are integrated in the printed circuit board (PCB) according to the described siren horn of claim 1.