CN2298982Y - Geomagnetic switching alarm - Google Patents

Abstract

The utility model discloses a geomagnetic switching alarm device which comprises a sense switch, a circuit module and a casing. The sense switch is composed of a movable arm contact and a static arm contact. The movable arm contact and the static arm contact are composed of magnetic needles and needle-shaped small shafts. After an output terminal of the sense switch is connected with an input terminal of the circuit module, the sense switch and the circuit module are installed in the casing together. A mechanical lock is installed at the side surface of the casing and is used as power switch. The utility model has the advantages that the simple structure is realized, an external connecting wire is not needed, and the breakage is avoided because the utility model is installed shadily. Because the magnetic force is constant, the work of the utility model is stable and reliable. The utility model is particularly suitable for the theft-proof alarm of a vehicle.

Description

The Ground magnetic switch warning device

The utility model relates to a kind of warning device, specifically the Ground magnetic switch warning device.

Existing sensitive switch such as impact, vibroswitch, pressure switch, ultrasonic, infrared light switch, the annunciator that magnetosensitive switch and mercury switch etc. are made is various in style, but this class annunciator is used for the following shortcoming of vehicle ubiquity, and some volume is big or have external on line that inconvenience is installed; Some disguised difference easily goes to pot and maybe can avoid not being triggered, and annunciator was lost efficacy; Some trigger sensitivity is wayward, and high obstacle overcome ability is poor, easily produces flase alarm, and is low and do not report to the police or the like.In a word, existing automobile-used annunciator poor practicability, applying of it has been subjected to very big influence so far.

The purpose of this utility model is at above-mentioned deficiency, designs a kind of Ground magnetic switch warning device that is used as power with earth south poles stationary magnetic field.

Technical solutions of the utility model are achieved in that the Ground magnetic switch warning device, comprise sensitive switch, circuit module, housing and source switch.Sensitive switch is made up of working arm contact head and static arm contact head that needle and the little axle of needle-like constitute.The mouth of sensitive switch is connected with the input end of circuit module in the housing of also packing into together, and the housing side is provided with source switch, the source switch mechanical lock.The working arm contact head needle of sensitive switch is shelved on the top of the little axle of needle-like, and the little axle of the needle-like other end is fixed on the circuit card.In the plane that needle rotates, be provided with static arm contact head.Circuit module comprises self-locking binary pair, wireless launcher, audible signal generator and power amplifier.The mouth of self-locking binary pair is connected with the input end of wireless launcher with the audible signal generator respectively, and the mouth of audible signal generator is connected with the input end of power amplifier, the mouth external loudspeaker of power amplifier.

Advantage, the utility model compared with prior art, the Ground magnetic switch warning device is simple in structure, constitutes embedded equipment, need not external on line, install hiddenly, firmly exempt from destruction; Because telluric magnetic force is constant, therefore, the device working stability is reliable, good in anti-interference performance; No matter car is to start, still be handled upside down, can both reliably in time report to the police as long as move.

Reaching embodiment below with reference to the accompanying drawings further specifies the utility model.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is an electrical schematic diagram of the present utility model.

As shown in Figure 1, the utility model comprises sensitive switch, circuit module, housing (13) and source switch (12).Sensitive switch is made up of working arm contact head and static arm contact head (3) that needle (1) and the little axle of needle-like (2) constitute.Needle (1) has the N.S utmost point and central capitate hollow small cap, and it is shelved on the top of the little axle of needle-like (2), and the other end of the little axle of needle-like (2) is fixed on the circuit card (10).Circuit module is made of self-locking binary pair (4), audible signal generator (5), wireless launcher (6) and power amplifier (7).Loud speaker (8) is fixed on the bottom panel of the housing (13) with sound equipment release aperture (17).It is connected with the mouth of power amplifier (7).Battery (9) is installed between the last lower clapboard (16) of band internal electrode contact.Power positive cathode contact (11), source switch (12) and battery mounting cover (14) are fixed on the side of housing (13).Power positive cathode contact (11) is used to connect external power supply or charger contact.Source switch (12) is used mechanical lock.Case top lid (15) is tightened in the end face of housing (13), and there is a capitate shrinkage pool in its central authorities, tightens the back and overlaps with needle (1) capitate hollow small cap is approaching, but leave the gap, rotates so that do not influence needle (1), can prevent that again it is come off by vibration.

In Fig. 2 electrical schematic diagram, needle (1) is a working arm contact head.LED and photo-transistor VT have constituted the static arm contact head (3) of sensitive switch.IC1 555 time base circuits are connected into rest-set flip-flop, constitute self-locking binary pair (4).IC2 KD9561 is connected into siren and produces circuit, constitutes audible signal generator (5).(6) be the wireless universal projector.Aerotron T1 constitutes power amplifier (7).Loud speaker (8) adopts high loudness loudspeaker.S1 is source switch (12).VDD is the voltage of battery (9), and its size is selected between 3 to 6V as required.Static arm contact head (3) also can use normal conductor.

The utility model principle of work is: needle (1) is stabilized in the North and South direction and static arm contact head (3) disconnection of balance position at ordinary times, do the time spent when being subjected to external force, needle (1) rotates and swings, must touch static arm contact head (3), Ground magnetic switch is connected, produce a trigging pulse, make self-locking binary pair (4) upset, export an on-off signal.On-off signal starts audible signal generation circuit (5) on the one hand and sends chimes of doom, opens wireless launcher (6) simultaneously and sends alerting signal, if also can make vehicle flame-out with the ignition device interlock.Specifically mode of operation is, the car owner uses the closed source switch (12) of key, and the warning device energising is in stand-by state.This moment, photo-transistor VT received the infrared beam that infrarede emitting diode LED emission comes, and was in conducting state, emitter output high level, make 2 pin of IC1 be high level, its 3 pin output low levels, IC2 and wireless launcher (6) do not have operating voltage, the no-output alerting signal.When car stolen car person moves, needle (1) rotates and swings, block infrared beam, photo-transistor VT is ended immediately, the VT emitter is low level, make 2 pin of IC1 become low level, the IC1 upset, 3 pin output high level on-off signal makes IC2 obtain the output alarm signal of working immediately of powering, amplify through power amplifier (6), send chimes of doom by loud speaker (8).Wireless launcher (6) the transmission wireless alarm signal of under the effect of high level on-off signal, also working immediately meanwhile.Because self-locking binary pair (4) has memory function, therefore, yowl incessantly till using key disconnecting power switch (12) in case trigger chimes of doom.

During installation, the Ground magnetic switch warning device is embedded a certain hidden, firm space in the protected object, in pipe, only expose lockhole towards the shelter.Owner uses key with source switch (12) closure during use, and energized is in it and waits for mode of operation.

Claims (8)

1, a kind of Ground magnetic switch warning device comprises sensitive switch and circuit module, it is characterized in that: a) sensitive switch is made up of working arm contact head and static arm contact head that needle, the little axle of needle-like constitute; B) pack into together after the input end of the mouth of sensitive switch and circuit module is connected in the housing; C) source switch is equipped with in the housing side.

2, Ground magnetic switch warning device as claimed in claim 1 is characterized in that needle is shelved on the top of the little axle of needle-like, and the other end of the little axle of needle-like is fixed on the circuit card.

3, Ground magnetic switch warning device as claimed in claim 1 is characterized in that static arm contact head is made of infrarede emitting diode and photo-transistor, or uses normal conductor.

4, Ground magnetic switch warning device as claimed in claim 1, it is characterized in that circuit module is by the self-locking binary pair, audible signal generator, wireless launcher and power amplifier constitute, the mouth of self-locking binary pair is connected with the input end of audible signal generator and wireless launcher respectively, the mouth of audible signal generator is connected with the input end of power amplifier, the mouth external loudspeaker of power amplifier.

5, Ground magnetic switch warning device as claimed in claim 1 is characterized in that source switch uses mechanical lock.

6, Ground magnetic switch warning device as claimed in claim 1 is characterized in that the housing side is equipped with the power positive cathode contact.

7, Ground magnetic switch warning device as claimed in claim 1 is characterized in that the housing end face has a loam cake.

8, Ground magnetic switch warning device as claimed in claim 7 is characterized in that there is a capitate shrinkage pool in loam cake central authorities.