CN204965643U - A warning circuit and computer case for theftproof of computer incasement part - Google Patents
A warning circuit and computer case for theftproof of computer incasement part Download PDFInfo
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- CN204965643U CN204965643U CN201520724783.8U CN201520724783U CN204965643U CN 204965643 U CN204965643 U CN 204965643U CN 201520724783 U CN201520724783 U CN 201520724783U CN 204965643 U CN204965643 U CN 204965643U
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- relay
- triode
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- circuit
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Abstract
The utility model relates to a warning circuit and computer case for theftproof of computer incasement part, include: trigger circuit, alarm, relay K, relay drive circuit and DC power supply are opened to the machine case, DC power supply opens trigger circuit through relay K's normally closed contact junctor case to and connect the alarm through relay K's normally open contact, the machine case is opened trigger circuit and is included: silicon controlled rectifier V1, the electric capacity C1 who links to each other with this silicon controlled rectifier V1's control electrode G to and connect the wire on quick -witted case lid and box, when wire disconnection back, silicon controlled rectifier V1 charges through electric capacity C1 and switches on, and the coil that makes relay drive circuit drive dynamic relay K gets electricly, normally closed contact disconnection promptly, and normally open contact is closed, alarm work. The utility model is used for the alarm device of computer incasement part theftproof can send alarm signal when computer machine case is opened, simple structure is practical.
Description
Technical field
The utility model patent relates to a kind of anti-theft warning circuit, and particularly a kind of warning circuit antitheft for computer host box inner part and computer host box, belong to application of electronic technology field.
Background technology
Computer uses extensively in modern's life; the core component of computer is all arranged in mainframe box; comprise the hard disk in cabinet; the parts such as memory bar; a lot of important informations that in these parts, people's life and work of in store use computer is relevant; once these parts are stolen by thief; not only can bring the loss of relevant property; more can lose much important information material, therefore design a device that can give the alarm when thief prepares the parts stolen in computer housing and protection computer housing data tool is played a very important role.Have a lot for the burglar alarm of notebook computer in the market, but it is relatively less for the anti-theft device of desktop computer, and the existing usual complex structure of some desktop computer warning devices on market, and cost is higher, therefore design that a kind of structure is simply easy to use and cost the is low warning device antitheft for computer host box inner part has market efficiency widely.
Utility model content
The technical problems to be solved in the utility model is: in order to provide a kind of structure simple, the warning device antitheft for computer housing inner part easy to use, can send alerting signal when computer cabinet is opened.
The utility model solves the technical scheme that its technical matters adopts: a kind of warning circuit antitheft for computer host box inner part, comprising: cabinet opens trigger circuit, alarm, relay K, relay drive circuit and direct supply; Wherein, described direct supply connects cabinet by the normally closed contact of relay K and opens trigger circuit, and connects alarm by the normally opened contact of relay K; And described cabinet is opened trigger circuit and comprised: controllable silicon V1, the electric capacity C1 be connected with the control pole G of this controllable silicon V1, and be connected to the tinsel on chassis lid and casing; After described tinsel disconnects, described controllable silicon V1 is by electric capacity C1 charging conducting, and make relay drive circuit drive the coil of relay K to obtain electric, namely normally closed contact disconnects, and normally opened contact closes, alarm work.
Further, leaf spring switch BT is connected with between described direct supply and the normally closed contact of relay K, described leaf spring switch BT is off state when computer cabinet lid is pushed down, when opening computer housing lid, leaf spring switch BT is then closure state, and link with described tinsel, described direct supply is communicated with the control pole G of controllable silicon V1 by resistance R1, makes controllable silicon V1 conducting.
Further, described relay drive circuit comprises: triode, transistor base resistance R2, and base-charging capacitance C2; When after controllable silicon V1 conducting, described base-charging capacitance C2 charges to make transistor base saturation conduction, and the coil of relay K obtains electric.
Further, described triode is Darlington triode, the amplifying circuit that described Darlington triode is formed comprises: triode Q1, triode Q2, the collector of wherein said triode Q1 and the collector of triode Q2 connect and form the collector of Darlington triode, the emitter of described triode Q1 and the base stage of described triode Q2 connect, the base stage of described triode Q1 is the base stage of Darlington triode, the emitter of the transmitting of described triode Q2 very Darlington triode; The driving force of the coil to relay K is improve by Darlington triode.
Further, coil and the kenotron D1 of described relay K are connected in parallel, and provide discharge loop when described kenotron D1 is used for the coil blackout for relay K, to play the effect of protection coil.
Preferably, described alarm comprises loudspeaker HA, is suitable for sending voice siren.
Another aspect, the utility model also provides a kind of computer host box, comprises described warning circuit.
The beneficial effects of the utility model are: the warning circuit antitheft for computer host box inner part of the present utility model and warning device can when thief open computer cabinet, and triggered alarm sends alerting signal rapidly; After alerting signal sends a period of time, automatically can terminate to report to the police, enter next cycle period again, and so forth, realize intermittent uninterrupted warning, and cost is low, structure is simply easy to use.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the utility model for the structural representation of the antitheft warning circuit of computer host box inner part.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present utility model are described in a schematic way, and therefore it only shows the formation relevant with the utility model.
Embodiment 1
Fig. 1 is the utility model for the structural representation of the antitheft warning circuit of computer host box inner part.
As shown in Figure 1, the present embodiment 1 provides a kind of warning circuit antitheft for computer host box inner part, comprising: cabinet opens trigger circuit, alarm, relay K, relay drive circuit and direct supply;
Wherein, described direct supply connects cabinet by the normally closed contact of relay K and opens trigger circuit, and connects alarm by the normally opened contact of relay K; And described cabinet is opened trigger circuit and comprised: controllable silicon V1, the electric capacity C1 be connected with the control pole G of this controllable silicon V1, and be connected to the tinsel on chassis lid and casing; After described tinsel disconnects, described controllable silicon V1 is by electric capacity C1 charging conducting, and make relay drive circuit drive the coil of relay K to obtain electric, namely normally closed contact disconnects, and normally opened contact closes, alarm work.
Further, leaf spring switch BT is connected with between described direct supply and the normally closed contact of relay K, described leaf spring switch BT is off state when computer cabinet lid is pushed down, when opening computer housing lid, leaf spring switch BT is then closure state, and link with described tinsel, described direct supply is communicated with the control pole G of controllable silicon V1 by resistance R1, makes controllable silicon V1 conducting.
Further, described relay drive circuit comprises: triode, transistor base resistance R2, and base-charging capacitance C2; When after controllable silicon V1 conducting, described base-charging capacitance C2 charges to make transistor base saturation conduction, and the coil of relay K obtains electric.
Preferably, described resistance R1, resistance R2 are respectively 10K, 20K heating resisting metal film resistance.
Further, described triode is Darlington triode, the amplifying circuit that described Darlington triode is formed comprises: triode Q1, triode Q2, the collector of wherein said triode Q1 and the collector of triode Q2 connect and form the collector of Darlington triode, the emitter of described triode Q1 and the base stage of described triode Q2 connect, the base stage of described triode Q1 is the base stage of Darlington triode, the emitter of the transmitting of described triode Q2 very Darlington triode.
Further, coil and the kenotron D1 of described relay K are connected in parallel, and provide discharge loop when described kenotron D1 is used for the coil blackout for relay K.
Preferably, described alarm comprises loudspeaker HA, is suitable for sending voice siren.Only represent with loudspeaker HA in Fig. 1.
The main operational principle of a kind of warning circuit antitheft for computer host box inner part of the utility model is as follows:
(1) described tinsel is in parallel with described electric capacity C1, even if described leaf spring switch BT button closes, the control pole G of described controllable silicon V1 is due to tinsel short circuit formation position at zero point, and therefore, controllable silicon V1 can not conducting.
(2), when opening chassis lid, the tinsel be connected on chassis lid and casing can disconnect, or described leaf spring switch BT closes simultaneously.
(3) the described direct supply control pole G that is communicated with described controllable silicon V1 by described resistance R1, makes described controllable silicon V1 conducting.The positive pole of described direct supply by the normally closed contact of described leaf spring switch BT, described relay K 1,2, described controllable silicon V1 conducting charges to described base-charging capacitance C2, to make described transistor base saturation conduction, the coil of described relay K obtains electric adhesive, thus drive the normally opened contact 1,3 of described relay K to close, namely connect described alarm, send alerting signal.
(4) along with the electric discharge of described base-charging capacitance C2, described Darlington triode base current declines, collector current declines, when collector current drops to the minimum current needed for the coil adhesive being not enough to maintain described relay K (during triode cut-off), the normally opened contact 1,3 of described relay K disconnects and normally closed contact 1,2 resets, namely disconnect described alarm, terminate this and report to the police.
(5) circulate (3) to the process of (4), move in circles, realize intermittent uninterrupted warning, until battery power exhausts stop alarm.
Embodiment 2
On embodiment 1 basis, the utility model also provides a kind of computer host box, comprises described warning circuit.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this utility model technological thought, can carry out various change and amendment completely.The technical scope of this utility model is not limited to the content on instructions, must determine its technical scope according to right.
Claims (7)
1. for the warning circuit that computer host box inner part is antitheft, it is characterized in that, comprising:
Cabinet opens trigger circuit, alarm, relay K, relay drive circuit and direct supply;
Described direct supply connects cabinet by the normally closed contact of relay K and opens trigger circuit, and connects alarm by the normally opened contact of relay K;
Described cabinet is opened trigger circuit and is comprised: controllable silicon V1, the electric capacity C1 be connected with the control pole G of this controllable silicon V1, and is connected to the tinsel on chassis lid and casing;
After described tinsel disconnects, described controllable silicon V1 is by electric capacity C1 charging conducting, and make relay drive circuit drive the coil of relay K to obtain electric, namely normally closed contact disconnects, and normally opened contact closes, alarm work.
2. warning circuit according to claim 1, is characterized in that,
Leaf spring switch BT is connected with between described direct supply and the normally closed contact of relay K,
Described leaf spring switch BT is off state when computer cabinet lid is pushed down, when opening computer housing lid, leaf spring switch BT is then closure state, and links with described tinsel, described direct supply is communicated with the control pole G of controllable silicon V1 by resistance R1, makes controllable silicon V1 conducting.
3. warning circuit according to claim 2, is characterized in that,
Described relay drive circuit comprises: triode, transistor base resistance R2, and base-charging capacitance C2;
When after controllable silicon V1 conducting, described base-charging capacitance C2 charges to make transistor base saturation conduction, and the coil of relay K obtains electric.
4. warning circuit according to claim 3, is characterized in that,
Described triode is Darlington triode, and the amplifying circuit that described Darlington triode is formed comprises: triode Q1, triode Q2, wherein
The collector of described triode Q1 and the collector of triode Q2 connect and form the collector of Darlington triode, the emitter of described triode Q1 and the base stage of described triode Q2 connect, the base stage of described triode Q1 is the base stage of Darlington triode, the emitter of the transmitting of described triode Q2 very Darlington triode.
5. warning circuit as claimed in claim 4, it is characterized in that, coil and the kenotron D1 of described relay K are connected in parallel, and provide discharge loop when described kenotron D1 is used for the coil blackout for relay K.
6. warning circuit as claimed in claim 5, it is characterized in that, described alarm comprises loudspeaker HA, is suitable for sending voice siren.
7. a computer host box, is characterized in that, comprising: the warning circuit as described in any one of claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520724783.8U CN204965643U (en) | 2015-09-18 | 2015-09-18 | A warning circuit and computer case for theftproof of computer incasement part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520724783.8U CN204965643U (en) | 2015-09-18 | 2015-09-18 | A warning circuit and computer case for theftproof of computer incasement part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204965643U true CN204965643U (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520724783.8U Expired - Fee Related CN204965643U (en) | 2015-09-18 | 2015-09-18 | A warning circuit and computer case for theftproof of computer incasement part |
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| CN (1) | CN204965643U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108153388A (en) * | 2017-11-27 | 2018-06-12 | 国网北京市电力公司 | Computer cabinet anti-theft device |
| CN109166277A (en) * | 2018-10-31 | 2019-01-08 | 路远 | A kind of the elderly's safety alarm device detection circuit |
| CN111399597A (en) * | 2020-03-04 | 2020-07-10 | 广东培正学院 | Computer memory bank mounting structure |
-
2015
- 2015-09-18 CN CN201520724783.8U patent/CN204965643U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108153388A (en) * | 2017-11-27 | 2018-06-12 | 国网北京市电力公司 | Computer cabinet anti-theft device |
| CN109166277A (en) * | 2018-10-31 | 2019-01-08 | 路远 | A kind of the elderly's safety alarm device detection circuit |
| CN111399597A (en) * | 2020-03-04 | 2020-07-10 | 广东培正学院 | Computer memory bank mounting structure |
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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: 20160113 Termination date: 20160918 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |