CN2246831Y - Wireless theft-proof alarm for suitcase - Google Patents

Abstract

The utility model relates to a wireless theft-proof alarm for a suitcase, which comprises an emitter and a receiver. The emitter is formed by connecting a direct current power supply circuit (1), a high frequency oscillating circuit (2) and a signal amplifying emitting circuit (3). The direct current power supply circuit (1) is connected in series with a double-switch circuit formed by connecting a switch K1 and a rocking switch K2 in parallel, and the receiver is formed by connecting a super-regenerative receiving circuit (5), a signal amplifier (6), a shaping switch circuit (7), and a sounding circuit provided with a piezoelectric ceramic sheet. The utility model solves the problem that the prior art has large electric energy consumption, inferior working reliability and single function, and is used for excessive distance sound prompt of the suitcase and alarm when the suitcase is taken by other people.

Description

Suitcase wireless anti-theft alarming device

The utility model relates to the burglar alarm that a kind of suitcase (bag) uses, particularly a kind of suitcase wireless anti-theft alarming device that adopts automatically controlled pronunciation type of alarm.

China utility model patent CN2146164Y has announced a kind of wireless super apart from the warning suitcase, it is made of transmitter, receiver and suitcase, its transmitter is made up of high frequency oscillator and amplification emissioning circuit, its receiver is made up of Armstrong circuit, signal amplification circuit, pronunciation circuit, output terminal at signal amplification circuit connects a relay J, by the contact J of relay J _1-1Control the conducting and the disconnection of pronunciation circuit, its pronunciation device is a loudspeaker.Its shortcoming is, pronunciation circuit in the receiver is controlled break-make by relay J, and utilize loudspeaker to send alarm sound, therefore its power consumption is bigger, as on-off element, cause its functional reliability relatively poor with relay J, it only has super distance pronunciation prompt facility in addition, do not shake warning function, function singleness.

The purpose of this utility model is, solves that the prior art power consumption is big, the problem of functional reliability difference and function singleness, and a kind of super distance prompt function that both had is provided, and has the suitcase wireless anti-theft alarming device that shakes warning function again.

In order to achieve the above object, the solution that the utility model is taked is: it is made up of transmitter and receiver, its transmitter is formed by connecting by high-frequency oscillating circuits, signal amplification emissioning circuit and DC power-supply circuit, receiver is connected in sequence by Armstrong circuit, signal amplification circuit, shaping on-off circuit, pronunciation circuit, each circuit that constitutes receiver all with direct supply V _DDConnect.Described DC power-supply circuit is by diode D ₁With direct supply V _CCSeries circuit and K switch ₁With rocker switch K ₂The biswitch circuit that is formed in parallel is formed, diode D ₁The a end of negative pole and above-mentioned DC power-supply circuit be connected diode D ₁Positive pole and direct supply V _CCPositive pole connect direct supply V _CCThe b end of negative pole and above-mentioned DC power-supply circuit is connected the diode D of setting between a end is held with b ₁With direct supply V _CCSeries circuit on, be in series with by K switch ₁With rocker switch K ₂The biswitch circuit that is formed in parallel, promptly this biswitch circuit can be serially connected with above-mentioned a end and diode D ₁Between the negative pole or diode D ₁Positive pole and direct supply V _CCBetween the positive pole, also can be serially connected in direct supply V _CCNegative pole and described b end between.The output terminal d of described high-frequency oscillating circuits is connected with the input end of signal amplification emissioning circuit, the power positive end c of above-mentioned high-frequency oscillating circuits and the power positive end of signal amplification emissioning circuit, all be connected with a end of DC power-supply circuit, high-frequency oscillating circuits and signal amplification emissioning circuit power supply negative terminal separately, the b that all is connected to DC power-supply circuit holds.Described rocker switch K ₂Be assembled by fixedly conductive contact and moving contact, its moving contact is fixed on the insulation crust.Signal amplification circuit in the receiver is by operational amplifier F ₁, F ₂, F ₃The three-stage amplifier that is connected in sequence can amplify sound signal.In described shaping on-off circuit, its phase inverter (not gate) F ₄Input end and output terminal between, be connected with resistance R ₁₄And K switch ₄Series arm, phase inverter F ₄Input end be connected to diode D ₂Negative pole, and through diode D ₂Be connected to the output terminal of above-mentioned signal amplification circuit, promptly be connected to operational amplifier F ₃Output terminal, at phase inverter F ₄Input end and direct supply V _DDNegative pole between be connected with capacitor C ₂₁Diode D ₂With capacitor C ₂₁Input signal can be carried out wave shaping, when outage, C ₂₁Can discharge, reach the purpose that prolongs the pronunciation warning.In the pronunciation circuit that constitutes receiver, the pronunciation chip IC ₁Input end through resistance R ₁₂With phase inverter F ₄Output terminal connect the pronunciation chip IC ₁Output terminal and its power supply negative terminal between, be connected with piezoelectric ceramic piece H, be used for sending alarm sound, the prompting owner note.IC ₁Power supply negative terminal be connected to direct supply V _DDNegative pole, its power positive end meets direct supply V _DDPositive pole is at direct supply V _DDBe connected with K switch on the residing power supply branch road ₃

During use, receiver is carried, transmitter is installed on the suitcase.Earlier with K switch ₁, K ₂, K ₃Closure makes transmitter, receiver all be in the power connection state.When suitcase owner at one's side the time, receiver receives the signal of transmitter, operational amplifier F ₃Be output as high level, make D ₂Conducting is through phase inverter F ₄Anti-phase low level makes the pronunciation chip IC ₁Be in halted state, can not send alarm sound.When suitcase leaves owner more than 3～5 meters the time, receiver can not receive the signal of transmitter or the signal received very weak, then make operational amplifier F ₃Output low level, phase inverter F ₄The output high level triggers pronunciation circuit, makes the pronunciation chip IC ₁Work, alarm sound is sent in piezoelectric ceramic piece H vibration.When warning function is shaken in utilization, with the K switch in the transmitter ₁Disconnect, with the K switch in the receiver ₃, K ₄Closure, then when suitcase is carried by other people, rocker switch K then ₂Rocked, its moving contact is contacted with fixing conductive contact, transmitter sends signal, then the operational amplifier F in the receiver ₃The output high level is through K switch ₄Directly trigger the pronunciation chip IC ₁Work, alarm sound is sent in then piezoelectric ceramic piece H vibration.Phase inverter F ₄Also can be an operational amplifier, its input end be selected the negative input end of operational amplifier for use, can play inverting function.

Because the utility model has adopted foregoing circuit, transmitter is provided with rocker switch, in receiver, the on-off element of pronunciation chip front end is a phase inverter, and pronunciation component adopts piezoelectric ceramic piece, thus it to have a power consumption little, the advantage that functional reliability is high, both can carry out over-distance alarm, and can carry out suitcase again and shake (proposing) warning, function is more.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a circuit block diagram of the present utility model;

Fig. 2 is a transmitter circuit schematic diagram of the present utility model shown in Figure 1;

Fig. 3 is an acceptor circuit schematic diagram of the present utility model shown in Figure 1;

Fig. 4 is a rocker switch structural representation in the transmitter of the present utility model shown in Figure 2.

In block scheme shown in Figure 1 and schematic diagram shown in Figure 2, constitute transmitter of the present utility model, be formed by connecting by DC power-supply circuit 1, high-frequency oscillating circuits 2 and signal amplification emissioning circuit 3, DC power-supply circuit 1 is by diode D ₁With direct supply V _CCBe in series, herein V _CCAdopt dry cell or rechargeable battery etc., supply voltage is 6V.Diode D ₁The a end of negative pole and circuit 1 be connected D ₁Positive pole and V _CCPositive pole connect V _CCNegative pole through K switch ₁With rocker switch K ₂The biswitch circuit that is formed in parallel is connected with the b end of foregoing circuit 1.High-frequency oscillating circuits 2 is by triode T ₁, T ₂, capacitor C ₁, C ₂And resistance R ₁, R ₂, R ₃, R ₄The collection base coupling multi-resonant oscillating circuit that is formed by connecting is at triode T ₁Collector and triode T ₂Base stage between be connected with capacitor C ₁, at triode T ₁Base stage and triode T ₂Collector between be connected with capacitor C ₂, triode T ₁Collector, triode T ₂Base stage, triode T ₁Base stage and triode T ₂Collector, respectively through resistance R ₁, R ₂, R ₃, R ₄Be connected to the power positive end C of high-frequency oscillating circuits 2, this power positive end C is connected triode T with a end of DC power-supply circuit 1 ₁, T ₂Emitter separately (being the power supply negative terminal of circuit 2) all is connected to the b end of DC power-supply circuit 1, the output terminal d of high-frequency oscillating circuits 2 and triode T ₂Collector connect.In signal amplification emissioning circuit 3, telefault L ₁With tunable capacitor C ₄The L that is formed in parallel ₁C ₄Oscillation circuit is connected in triode T ₃Between a end of collector and DC power-supply circuit 1, inductance L ₂With capacitor C ₅A point in parallel of parallel circuit is connected to triode T ₃Emitter, its another point in parallel is through resistance R ₆Be connected with the b end of DC power-supply circuit 1, at triode T ₃Emitter and above-mentioned a end between be connected with capacitor C ₆, increasing the frequency bandwidth that transmits with this, the undesired signal that prevents human body sensing effectively and produced is to its influence, thereby improves the stability of its work.Triode T ₃Collector is through capacitor C ₇M is connected with emitting antenna.Diode D in the DC power-supply circuit 1 ₁Each element in the transmitter is played a protective role.In synoptic diagram shown in Figure 4, rocker switch K ₂By fixedly conductive contact 8 and moving contact 10 are assembled, moving contact 10 is fixed on the insulation crust 9, and among Fig. 4, moving contact 10 is formed by conductor ball and support spring connection, support spring is fixed on the insulation crust 9, and the conductor ball conductive contact 8 that is fixed is enclosed in its inner space.In block scheme shown in Figure 1 and circuit theory diagrams shown in Figure 3, receiver of the present utility model by Armstrong circuit 5, signal amplification circuit 6, shaping sky close circuit 7, pronunciation circuit 4 is connected in sequence, its each circuit all with direct supply V _DDConnect.In Armstrong circuit 5, triode T ₄Between collector and the audio signal output end e, be connected with tunable capacitor C ₉With telefault L ₃The L that is formed in parallel ₃C ₉Oscillation circuit, above-mentioned output terminal e is through capacitor C ₁₂With operational amplifier F in the signal amplification circuit 6 ₁Input end connect; Through resistance R ₇With T ₄Base stage connect; Through resistance R ₁₃And K switch ₃With direct supply V _DDAnodal connection, T ₄Collector and emitter between be connected with capacitor C ₁₀, T ₄Collector through capacitor C ₈N is connected with signal receiving antenna, triode T ₄Emitter successively through inductance L ₄, capacitor C ₄With resistance R ₈Parallel circuit, be connected to direct supply V _DDNegative pole, T ₄Base stage through capacitor C ₁₃With V _DDNegative pole connects.Signal amplification circuit 6 is by operational amplifier F ₁, F ₂, F ₃Three utmost point amplifying circuits that are in turn connected into, the signal input part of above-mentioned each operational amplifier is positive input terminal, i.e. homophase input, linear amplification signal.Operational amplifier F ₁Output terminal through capacitor C and operational amplifier F ₃Input end connect, at operational amplifier F ₁Input end and output terminal between, be connected with capacitor C respectively ₁₅And resistance R ₉, i.e. R ₉With C ₁₅Be parallel to F ₁Between the two ends, at operational amplifier F ₂Be connected with resistance R between input end and the output terminal ₁₀, above-mentioned F ₁Input end, F ₁Output terminal, F ₂Output terminal, F ₃Output terminal, respectively through capacitor C ₁₄, C ₁₆, C ₁₉And C ₂₀With V _DDNegative pole connect F ₃Input end through resistance R ₁₁, K switch ₃With V _DDPositive pole connect.In shaping on-off circuit 7, phase inverter F ₄Input end be connected to diode D ₂Negative pole, and through diode D ₂Be connected to above-mentioned operational amplifier F ₃Output terminal, promptly be connected to the output terminal of signal amplification circuit 6.At phase inverter F ₄Input end and direct supply V _DDBe connected with capacitor C between the negative pole ₂₁, at phase inverter F ₄Between input end and the output terminal, be connected with resistance R ₁₄With K switch ₄The branch road that is in series.Pronunciation circuit 4 is formed by connecting by pronunciation chip IC 1 and electroceramics sheet H, and the input end of IC1 (pin 1) is through resistance R ₁₂With phase inverter F ₄Output terminal connect, its power positive end (pin 2) is through K switch ₃Meet direct supply V _DDAnodal, between IC1 output terminal (pin 4) and its power supply negative terminal (pin 3), be connected with piezoelectric ceramic piece H, in this piezoelectric ceramic piece H, be clipped in the piezoelectric ceramics shape rectangular shape preferably between the two end plates, increase its oscillation amplitude with this, improve the warning volume.The power supply negative terminal of IC1 (pin 3) meets V _DDNegative pole, IC herein ₁Select beeper pronunciation chip for use.V _DD6V direct supply for formations such as dry cell or rechargeable batteries.Above-mentioned R ₁₁Effect be the influence that reduces interference level, diode D ₂And capacitor C ₂₁Effect be wave shaping, phase inverter F ₄Play the effect of on-off element, be used to control the work of pronunciation circuit 4, capacitor C ₂₁By self-discharge, after outage, can play the effect of delayed alarm, the principle of work of above-mentioned Armstrong circuit 5, signal amplification circuit 6, shaping on-off circuit 7, high-frequency oscillating circuits 2 and signal amplification emissioning circuit 3 is known by those skilled in the art, and the front has been done concise and to the point narration, no longer describes in detail herein.

Claims (2)

1, a kind of suitcase wireless anti-theft alarming device, form by transmitter and receiver, described transmitter is formed by connecting by DC power-supply circuit [1], high-frequency oscillating circuits [2] and signal amplification emissioning circuit [3], described receiver is connected in sequence by Armstrong circuit [5], signal amplification circuit [6], shaping on-off circuit [7] and pronunciation circuit [4], it is characterized in that described DC power-supply circuit [1] is by diode D ₁With direct supply V _CCSeries circuit and K switch ₁With rocker switch K ₂The biswitch circuit that is formed in parallel is formed, its a end and diode D ₁Negative pole connect diode D ₁Positive pole and direct supply V _CCAnodal connection, direct supply V _CCNegative pole connects the b end of DC power-supply circuit [1], on the series circuit between described a end and the b end, be in series with described biswitch circuit, the input end of described signal amplification emissioning circuit [3] is connected with the output terminal d of high-frequency oscillating circuits [2], the power positive end of the power positive end c of described high-frequency oscillating circuits [2] and signal amplification emissioning circuit [3], all be connected to a end of described DC power-supply circuit [1], both power supply negative terminals all are connected to the b end of DC power-supply circuit [1], described rocker switch K ₂Be assembled by fixedly conductive contact [8] and moving contact [10], moving contact [10] is fixed on the insulation crust [9], and described signal amplification circuit [6] is by operational amplifier F ₁, F ₂, F ₃Three utmost point amplifying circuits that are connected in sequence, in described shaping on-off circuit [7], phase inverter F ₄Input terminating diode D ₂Negative pole, and through diode D ₂Be connected with the output terminal of signal amplification circuit [6], at phase inverter F ₄Input end and direct supply V _DDBetween the negative pole, be connected with capacitor C ₂₁, at phase inverter F ₄Input end and output terminal between, be connected with resistance R ₁₄With K switch ₄The branch road that is in series, in described pronunciation circuit [4], the pronunciation chip IC ₁Input end through resistance R ₁₂, with described phase inverter F ₄Output terminal connect, in the pronunciation chip IC ₁Power supply negative terminal and output terminal between, be connected with piezoelectric ceramic piece H.

2, suitcase wireless anti-theft alarming device as claimed in claim 1 is characterized in that, described rocker switch K ₂Moving contact [10], connect by conductor ball and support spring and to form, described support spring is fixed on the insulation crust [9], described conductor ball is enclosed in its inner space by described fixedly conductive contact [8].

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