CN2199566Y

CN2199566Y - Mini alarm

Info

Publication number: CN2199566Y
Application number: CN 94238821
Authority: CN
Inventors: 刘方栋
Original assignee: DAYI INDUSTRY Co SHANGHAI
Current assignee: DAYI INDUSTRY Co SHANGHAI
Priority date: 1994-06-02
Filing date: 1994-06-02
Publication date: 1995-05-31
Anticipated expiration: 2004-06-02

Abstract

The utility model relates to a mini alarm, which is composed of an electronic circuit and a box-shaped casing made of plastic. The plastic casing is provided with an acoustic frequency cavity resonator to cause the alarm sound sent by the electronic circuit can be further amplified in the cavity resonator to send out loud alarm sound. The utility model not only can be carried to guard against theft, but also can be connected with the net to guard against theft and theft protection. Moreover, the utility model can also be used as a mini flashlight, with low cost and easy use.

Description

Mini alarm

A kind of miniature electronic warning horn belongs to electronic technology field.

At present domestic and international common portable alarming device, volume is all bigger, and the alarm song that sends is faint, weak effect, function singleness.

The purpose of this utility model provides a kind ofly both can carry theft protection, but networking anti-theft is stolen again, and can be used as the miniature warning horn that torch for illumination is used.

Scheme of the present utility model is to make a small-sized box-like housing with plastic cement; one end of housing is by illuminating light emitting diode is housed; the other end draws toot switch by plug-in type is housed; by the acoustic frequency generator electronic circuit is housed, draws the control electronic circuit work of toot switch or do not work in the box-like housing, the plug of switch is connected with protected object with cotton rope; when protected object stolen; the plug that draws toot switch is drawn out, and chimes of doom is sent in the electronic circuit work in the warning horn.

The utility model has following accompanying drawing:

Accompanying drawing 1 is an outside drawing of the present utility model.

Accompanying drawing 2 is side partial sectional view of accompanying drawing 1.

Accompanying drawing 3 is that the utility model is used as the networking anti-theft synoptic diagram.

Accompanying drawing 4 is basic circuit diagrams.

The utility model has the advantages that volume is little, can be placed in the pocket or handbag in, the alarm song that sends is special to be rung, and can use separately, also can implement networking anti-thefts to a plurality of objects, uses but also can be used as torch.

Be described in detail embodiment of the present utility model down in conjunction with the accompanying drawings.

Accompanying drawing 1 is an outside drawing of the present utility model; it is a box-like housing 4 that is injection molded into plastic cement; there is an illuminating light emitting diode 1 upper end; the lower end has one to draw toot combined socket and switch 5; when plug inserts; the power supply of internal circuit disconnects; there is a resonant cavity panel 3 in the front of plastic casing 4; there is a garden shape vocal hole 6 in the central authorities of panel 3; the side of housing 4 has a miniature push switch 2; control light emitting diode energized; use as miniature electric torch; accompanying drawing 2 is side views of Fig. 1; from partial sectional view as seen; the inside of resonator cavity panel 3; outstanding ring 7 is arranged; on outstanding ring 7; be stamped a garden shape buzzing sheet 9; thereby by resonator cavity panel 3; outstanding ring 7 and buzzing sheet 9 constitute a resonant cavity 8; make alarm song that this cavity and buzzing sheet send altogether toot; thereby its chimes of doom can reach best loudness; when the utility model uses separately; the plug that draws on toot the socket is connected with protected object with cotton rope; when object is stolen; plug on the socket 5 is drawn out; the circuit energized work of warning horn; and send powerful alarm song; accompanying drawing 3 is the utility model synoptic diagram to a plurality of object networking anti-thefts; electric wire 10 among the figure is two connecting lines of alarm power supply; when K switch is opened; alarm is in the non-state of alert; when closing; anti-theft net is on the alert; draw toot switch A this moment; B; C; D is antitheft to four kinds of protected object warnings respectively; A among the figure; the C group is normally closed contact; B; the C group is normally opened contact; these draw toot switch can place door and window; the shelter of cabinet or vehicle; when any one group of switch is pulled; make the circuit energized in the alarm; alarm just sends chimes of doom; accompanying drawing 4 is alarm acoustic frequency generator electrical schematic diagrams; repercussion device IC1 among the figure; IC2 and R6; C2 constitutes audio oscillator; repercussion device IC1; IC2 and R1; C1 makes continuous audio frequency; become the audio frequency of interrupted oscillation, two triode BG form power amplification, at the emitter of power discharging transistor; transformer B1 and buzzing sheet 9 constitutes resonant tanks, buzzing sheet 9 send in chimes of doom and the cavity housing 4 in 8 altogether toot and further amplification send powerful chimes of doom.

Claims

1; a kind of miniature warning horn; constitute by electronic circuit and plastic casing; an end that it is characterized in that north glue housing (4) has and draws toot combined socket and switch (5); the other end has illumination light-emitting diode (1); side has miniature push switch (2); there is a resonator cavity panel (3) in the front; there is a vocal hole (6) in the central authorities of panel (3); there is outstanding ring (7) inboard of panel (3); on outstanding ring (7), be stamped a garden shape buzzing sheet (9); constitute a resonant cavity (8) from face; housing (4) is interior by the acoustic frequency generator electronic circuit is housed; and by the power connection that draws the plug control electronic circuit on toot the combined socket and switch (5) or disconnect, this plug connects a rope yarn, and rope yarn is connected with protected thing; when protected thing is a plurality of object; then use a plurality of plug-in type switch in parallel, each switch is connected with protected thing, constitutes a networking anti-theft system.

2, by the described warning horn of claim 1, it is characterized in that electronic circuit constitutes audio oscillator by reverser IC3, IC4 and R6, C2, reverser IC1, IC2 and R2, R1, C1 make continuous audio frequency become the audio frequency of interrupted oscillation, two triode BG form power amplification, at the emitter of power discharging transistor, transformer B1 and buzzing sheet (9) constitute resonant tank.