CN203966274U - Antitheft storer - Google Patents
Antitheft storer Download PDFInfo
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- CN203966274U CN203966274U CN201420432977.6U CN201420432977U CN203966274U CN 203966274 U CN203966274 U CN 203966274U CN 201420432977 U CN201420432977 U CN 201420432977U CN 203966274 U CN203966274 U CN 203966274U
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Abstract
Antitheft storer, relates to computer fittings field.Solve the problem that existing storer does not have anti-theft early-warning function.Antitheft storer comprises housing, USB interface and dust cover, described housing is fixedly connected with USB interface, dust cover covers on the outside of USB interface, and described dust cover is connected by draw-in groove with housing, described antitheft storer also comprises safety protective circuit, described safety protective circuit is fixed in housing, safety protective circuit comprises tablet, single-shot trigger circuit, voice alarm circuit and loudspeaker, in the time having people near storer, because human body is near tablet, internal circuit makes loudspeaker send sound by level triggers, thereby realize the function of early warning, ensure memory-safe, make original holder's privacy and economy avoid loss.The utility model is applicable to the anti-theft early-warning of storer.
Description
Technical field
The utility model relates to computer fittings field.
Background technology
Along with the development of information society, " articles for daily use " that storer necessitates gradually, the memory capacity of storer is larger, and small volume is easy to carry, many people can be placed in important or the information of privacy in storer, to be convenient for carrying, and can check at any time, but, often there is the situation that storer is stolen, cause user to produce extremely serious consequence.
Utility model content
The utility model does not have the problem of anti-theft early-warning function in order to solve existing storer, proposed antitheft storer.
Antitheft storer comprises housing, USB interface and dust cover, described housing is fixedly connected with USB interface, dust cover covers on the outside of USB interface, and described dust cover is connected by draw-in groove with housing, described antitheft storer also comprises safety protective circuit, described safety protective circuit is fixed in housing, and safety protective circuit comprises tablet P, single-shot trigger circuit, voice alarm circuit and loudspeaker BL;
Tablet P adopts sheet metal to realize;
Single-shot trigger circuit comprises NE555 time-base integrated circuit, resistance R 1, resistance R 2, slide rheostat Rp, nmos pass transistor VF, NPN triode VT1, electrochemical capacitor C1, capacitor C 2 and diode D;
The grid of nmos pass transistor VF connects tablet P, and the drain electrode of nmos pass transistor VF connects the base stage of NPN triode VT1 and the stiff end of slide rheostat Rp simultaneously;
The sliding end of slide rheostat Rp simultaneously one end, the NE555 time-base integrated circuit of one end, the resistance R 2 of contact resistance R1 4 pin, 8 pin and+5V power supply;
The other end of resistance R 1 connects the collector of NPN triode VT1 and 2 pin of NE555 time-base integrated circuit simultaneously;
The other end of resistance R 2 connects the positive pole of electrochemical capacitor C1,6 pin and 7 pin of NE555 time-base integrated circuit simultaneously;
5 pin of NE555 time-base integrated circuit connect one end of capacitor C 2;
3 pin of NE555 time-base integrated circuit connect the negative electrode of diode D, and as the alarm command output terminal of single-shot trigger circuit;
The other end of the anode of diode D, 1 pin of NE555 time-base integrated circuit, capacitor C 2, the negative pole of electrochemical capacitor C1, the emitter of NPN triode VT1 and the source ground of nmos pass transistor VF;
Voice alarm circuit comprises voice integrated chip LQ46, resistance R 3, electrochemical capacitor C3, NPN triode VT2 and loudspeaker BL;
The alarm command output terminal of single-shot trigger circuit connects 3 pin, one end of resistance R 4 and the positive pole of electrochemical capacitor C3 of voice integrated chip LQ46 simultaneously;
The other end of resistance R 4 connects 5 pin and 8 pin of voice integrated chip LQ46 simultaneously;
4 pin of voice integrated chip LQ46 connect the base stage of NPN triode VT2;
The collector of NPN triode VT2 connects the negative pole of loudspeaker BL;
The positive pole of loudspeaker BL connects one end of power supply+5V and resistance R 3 simultaneously, and the other end of resistance R 3 connects NE555 time-base integrated circuit 8 pin;
Emitter, 1 pin of voice integrated chip LQ46 and the negative pole of electrochemical capacitor C3 of NPN triode VT2 ground connection simultaneously.
Beneficial effect: memory construction described in the utility model is simple; convenient and practical; by embedding safety protective circuit; in the time having people near storer; because human body is near tablet, internal circuit makes loudspeaker send sound by level triggers, thereby realizes the function of early warning; ensure memory-safe, made original holder's privacy and economy avoid loss.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the right view of Fig. 1;
Fig. 3 is the circuit diagram of safety protective circuit.
Embodiment
Embodiment one, in conjunction with Fig. 1-Fig. 3, this embodiment is described, antitheft storer described in this embodiment comprises housing (1), USB interface (2) and dust cover (3), described housing (1) is fixedly connected with USB interface (2), dust cover (3) covers on the outside of USB interface (2), and described dust cover (3) is connected by draw-in groove with housing (1), described antitheft storer also comprises safety protective circuit, described safety protective circuit is fixed in housing (1), safety protective circuit comprises tablet P, single-shot trigger circuit, voice alarm circuit and loudspeaker BL,
Tablet P adopts sheet metal to realize;
Single-shot trigger circuit comprises NE555 time-base integrated circuit, resistance R 1, resistance R 2, slide rheostat Rp, nmos pass transistor VF, NPN triode VT1, electrochemical capacitor C1, capacitor C 2 and diode D;
The grid of nmos pass transistor VF connects tablet P, and the drain electrode of nmos pass transistor VF connects the base stage of NPN triode VT1 and the stiff end of slide rheostat Rp simultaneously;
The sliding end of slide rheostat Rp simultaneously one end, the NE555 time-base integrated circuit of one end, the resistance R 2 of contact resistance R1 4 pin, 8 pin and+5V power supply;
The other end of resistance R 1 connects the collector of NPN triode VT1 and 2 pin of NE555 time-base integrated circuit simultaneously;
The other end of resistance R 2 connects the positive pole of electrochemical capacitor C1,6 pin and 7 pin of NE555 time-base integrated circuit simultaneously;
5 pin of NE555 time-base integrated circuit connect one end of capacitor C 2;
3 pin of NE555 time-base integrated circuit connect the negative electrode of diode D, and as the alarm command output terminal of single-shot trigger circuit;
The other end of the anode of diode D, 1 pin of NE555 time-base integrated circuit, capacitor C 2, the negative pole of electrochemical capacitor C1, the emitter of NPN triode VT1 and the source ground of nmos pass transistor VF;
Voice alarm circuit comprises voice integrated chip LQ46, resistance R 3, electrochemical capacitor C3, NPN triode VT2 and loudspeaker BL;
The alarm command output terminal of single-shot trigger circuit connects 3 pin, one end of resistance R 4 and the positive pole of electrochemical capacitor C3 of voice integrated chip LQ46 simultaneously;
The other end of resistance R 4 connects 5 pin and 8 pin of voice integrated chip LQ46 simultaneously;
4 pin of voice integrated chip LQ46 connect the base stage of NPN triode VT2;
The collector of NPN triode VT2 connects the negative pole of loudspeaker BL;
The positive pole of loudspeaker BL connects one end of power supply+5V and resistance R 3 simultaneously, and the other end of resistance R 3 connects NE555 time-base integrated circuit 8 pin;
Emitter, 1 pin of voice integrated chip LQ46 and the negative pole of electrochemical capacitor C3 of NPN triode VT2 ground connection simultaneously.
In present embodiment, in the time of unmanned close storer, the nmos pass transistor VF output low level that drains, NPN triode VT1 cut-off, 2 pin of NE555 time-base integrated circuit are high level, are now steady state (SS), 3 pin output low levels of NE555 time-base integrated circuit, voice integrated chip LQ46 must not be electric, and loudspeaker BL does not ring.
In the time having people near storer, because human body is near tablet P, human body sensing electric field makes nmos pass transistor VF that pinch off occur, drain potential raises, NPN triode VT1 conducting, its collector is that 2 pin level of NE555 time-base integrated circuit decline, when be down to operating voltage 1/3 time, monostalbe trigger enters transient state, be 3 pin output high level of NE555 time-base integrated circuit, voice integrated chip LQ46 obtains electric, and loudspeaker BL reports to the police, and the voice of output are the audio-frequency information of disposable burning before voice integrated chip LQ46 dispatches from the factory.
Embodiment two, in conjunction with Fig. 1 and Fig. 2, this embodiment is described; this embodiment is with the difference of the antitheft storer described in embodiment one; it also comprises power supply and switch (4); described power supply is for powering to safety protective circuit; described switch (4) is arranged on the outside of housing, for the duty of handover security holding circuit.
Claims (2)
1. antitheft storer, it comprises housing (1), USB interface (2) and dust cover (3), described housing (1) is fixedly connected with USB interface (2), dust cover (3) covers on the outside of USB interface (2), and described dust cover (3) is connected by draw-in groove with housing (1), it is characterized in that, described antitheft storer also comprises safety protective circuit, described safety protective circuit is fixed in housing (1), and safety protective circuit comprises tablet P, single-shot trigger circuit, voice alarm circuit and loudspeaker BL;
Tablet P adopts sheet metal to realize;
Single-shot trigger circuit comprises NE555 time-base integrated circuit, resistance R 1, resistance R 2, slide rheostat Rp, nmos pass transistor VF, NPN triode VT1, electrochemical capacitor C1, capacitor C 2 and diode D;
The grid of nmos pass transistor VF connects tablet P, and the drain electrode of nmos pass transistor VF connects the base stage of NPN triode VT1 and the stiff end of slide rheostat Rp simultaneously;
The sliding end of slide rheostat Rp simultaneously one end, the NE555 time-base integrated circuit of one end, the resistance R 2 of contact resistance R1 4 pin, 8 pin and+5V power supply;
The other end of resistance R 1 connects the collector of NPN triode VT1 and 2 pin of NE555 time-base integrated circuit simultaneously;
The other end of resistance R 2 connects the positive pole of electrochemical capacitor C1,6 pin and 7 pin of NE555 time-base integrated circuit simultaneously;
5 pin of NE555 time-base integrated circuit connect one end of capacitor C 2;
3 pin of NE555 time-base integrated circuit connect the negative electrode of diode D, and as the alarm command output terminal of single-shot trigger circuit;
The other end of the anode of diode D, 1 pin of NE555 time-base integrated circuit, capacitor C 2, the negative pole of electrochemical capacitor C1, the emitter of NPN triode VT1 and the source ground of nmos pass transistor VF;
Voice alarm circuit comprises voice integrated chip LQ46, resistance R 3, electrochemical capacitor C3, NPN triode VT2 and loudspeaker BL;
The alarm command output terminal of single-shot trigger circuit connects 3 pin, one end of resistance R 4 and the positive pole of electrochemical capacitor C3 of voice integrated chip LQ46 simultaneously;
The other end of resistance R 4 connects 5 pin and 8 pin of voice integrated chip LQ46 simultaneously;
4 pin of voice integrated chip LQ46 connect the base stage of NPN triode VT2;
The collector of NPN triode VT2 connects the negative pole of loudspeaker BL;
The positive pole of loudspeaker BL connects one end of power supply+5V and resistance R 3 simultaneously, and the other end of resistance R 3 connects NE555 time-base integrated circuit 8 pin;
Emitter, 1 pin of voice integrated chip LQ46 and the negative pole of electrochemical capacitor C3 of NPN triode VT2 ground connection simultaneously.
2. antitheft storer according to claim 1; it is characterized in that, it also comprises power supply and switch (4), and described power supply is for powering to safety protective circuit; described switch (4) is arranged on the outside of housing, for the duty of handover security holding circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420432977.6U CN203966274U (en) | 2014-08-01 | 2014-08-01 | Antitheft storer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420432977.6U CN203966274U (en) | 2014-08-01 | 2014-08-01 | Antitheft storer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203966274U true CN203966274U (en) | 2014-11-26 |
Family
ID=51926830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420432977.6U Expired - Fee Related CN203966274U (en) | 2014-08-01 | 2014-08-01 | Antitheft storer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203966274U (en) |
-
2014
- 2014-08-01 CN CN201420432977.6U patent/CN203966274U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141126 Termination date: 20150801 |
|
| EXPY | Termination of patent right or utility model |