CN2777654Y - Inductive alarm - Google Patents

Abstract

The utility model relates to an inductive alarm which belongs to a safety protection device. The utility model comprises an alarm circuit which is composed of a music chip, a loudspeaker, a power amplification electric apparatus, a power supply and a micro switch. The utility model is characterized in that the power amplification electric apparatus is connected in series between a positive pole of the power supply and the loudspeaker; the other end of the power amplification electric apparatus is also connected with the music chip; the micro switch is connected in series between a negative pole of the power supply and the loudspeaker. The utility model has the advantages of simple structure, low price and strong operability. The utility model has a good function for preventing theft and driving a thief, the utility model can remind an owner which is asleep to get up and catch a thief in time, and the utility model is safe and practical. The utility model has definite invisibility and can not easily be discovered by a thief. The utility model can be widely positioned at the side of a window or a door in families and offices.

Description

A kind of induction type alarm

Technical field

The utility model relates to a kind of alarm, particularly relates to a kind of induction type alarm that prevents that the thief from entering from window or doorway that is exclusively used in, and is to the replenishing of existing burglar alarm kind, and belongs to safety apparatus, and suitable town and country are common, and other installs and uses.

Background technology

At present, existing burglar alarm kind is a lot, the existing thief of preventing enters from door, also have to prevent that the thief from entering from window, substantially all be medium-to-high grade product, its complex structure, bring a high price, be unsuitable in town and country common other popularize and promote.And great majority other still only prevent that by closing traditional window the thief enters, also have and outside window, install one protection network additional, but above-mentioned measure can not prevent entering of thief.For guaranteeing a stable life order, people press for the burglar alarm that a kind of popular style can be arranged and come out.

The utility model content

The purpose of this utility model is to overcome the prior art above shortcomings, improves by research, provides a kind of induction type alarm of popular style.This novel induction type alarm is simple in structure, cheap, workable, has the stronger antitheft crafty function of driving, and can in time remind the owner who sleep soundly to get up to catch a thief, both safe and practical, have certain disguise again and be difficult for being found by the thief, can be widely used in the window limit or the door limit of family and office.

The technical scheme that the utility model provides is: this induction type alarm, include a warning circuit of forming by Music Clip, loudspeaker, power amplification electrical equipment, power supply and microswitch, be characterized in that described power amplification electrical equipment is serially connected between positive source and the loudspeaker, the other end of power amplification electrical equipment also is connected with a Music Clip, and described microswitch is serially connected between power cathode and the loudspeaker.

Power supply in the warning circuit in the technique scheme, adopting 1.5 volts dry cell is power supply, and during alarm work, microswitch is open circuit, and making warning circuit is off state, and the loudspeaker and the Music Clip that are connected in the circuit are not all worked.In case the thief leaps in through the window, as long as push the alert device housing that drapes over one's shoulders that window bumps the next door open, microswitch will be connected, and whole warning circuit forms path, and the loudspeaker and the Music Clip that are connected in the circuit are started working, and send alerting signal.

Compared with prior art, the beneficial effects of the utility model are: simple in structure, cheap, workable, have and stronger antitheftly drive crafty function, and can in time remind the owner who sleep soundly to get up to catch a thief, both safe and practical, have certain disguise again and be difficult for being found, can extensively be positioned over the window limit or the door limit of family and office by the thief.

Description of drawings

Accompanying drawing is the warning circuit schematic diagram of the embodiment that provides of the utility model.

Number in the figure: 1. power supply, 2. power amplifier, 3. Music Clip, 4. microswitch, 5. loudspeaker.

Embodiment

As shown in drawings, this induction type alarm that the utility model provides, include a warning circuit of forming by Music Clip 3, loudspeaker 5, power amplification electrical equipment 2, power supply 1 and microswitch 4, wherein power amplification electrical equipment 2 is serially connected between power supply 1 positive pole and the loudspeaker 5, the other end of power amplification electrical equipment 5 also is connected with a Music Clip 3, and 4 of microswitches are serially connected between power supply 1 negative pole and the loudspeaker 5.

When alarm work, microswitch 4 is open circuit, and making warning circuit is off state, and the loudspeaker 5 and the Music Clip 3 that are connected in the circuit are not all worked.In case the thief leaps in through the window, as long as push the alarm housing that window bumps the next door open, microswitch 4 will be connected, and whole warning circuit forms path, and the loudspeaker 5 and the Music Clip 3 that are connected in the circuit are started working, and send alerting signal.

Claims (1)

1. induction type alarm, include a warning circuit of forming by Music Clip, loudspeaker, power amplification electrical equipment, power supply and microswitch, it is characterized in that described power amplification electrical equipment is serially connected between positive source and the loudspeaker, the other end of power amplification electrical equipment also is connected with a Music Clip, and described microswitch is serially connected between power cathode and the loudspeaker.

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