CN104217553A - Key alarming device - Google Patents
Key alarming device Download PDFInfo
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- CN104217553A CN104217553A CN201410185267.2A CN201410185267A CN104217553A CN 104217553 A CN104217553 A CN 104217553A CN 201410185267 A CN201410185267 A CN 201410185267A CN 104217553 A CN104217553 A CN 104217553A
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- control chip
- direct supply
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Abstract
The invention discloses a key alarming device which is used for giving an alarm to remind a user when the user forgets to pull out a key. The key alarming device comprises a box (3), an alarming circuit and a connecting wire (2), wherein the alarming circuit is arranged in the box (3); and one end of the connecting wire (2) penetrates in a through hole in the box (3) and is connected with a switch unit (32) of the alarming circuit. The key alarming device has the advantages that after the key is inserted in a key hole, a common switch is turned on under the gravity action of the box, so that alarming is triggered; and an indicator lamp has an indication function, the user cannot forget to pull out the key, and property loss is reduced.
Description
Technical field
The present invention relates to electronics and alarm technique field, more particularly, relate to and a kind ofly pull out alarm with the key warning device of reminding user for forgetting at key.
Background technology
Many people may there is such experience, and in enabling or after locking a door, or forget key to take out in time after automobile flameout etc., particularly for some people had a bad memory and elder, often forget to pull out key, make crafty gangster have an opportunity to take advantage of, this brings great hidden danger to property safeties such as families.Forget to pull out key the phenomenon and the family's property caused, automobile, motorcycle are stolen etc. at present extensively to exist, bring very large inconvenience to the life of people, bring serious threat to the property safety of people.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, provides a kind of key warning device.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of key warning device, alarm is pulled out with reminding user for forgetting at key, described key warning device comprises box body and is located at the warning circuit in described box body, described key warning device also comprises connecting line, and one end of described connecting line is connected with the switch element of described warning circuit through the through hole on described box body.
In above-mentioned key warning device, described warning circuit comprises the power supply unit, switch element, control module and the alarm unit that are electrically connected successively; When the pulling force that described connecting line puts on switch element is greater than a preset value, described switch element closes; Described control module is used for after described switch element is closed, control described alarm unit and reports to the police; Described power supply unit is used for powering to described control module after described switch element is closed.
In above-mentioned key warning device, the other end of described connecting line is connected with the end of key.
In above-mentioned key warning device, described key warning device also comprises clasp, and the other end of described connecting line is connected with described clasp.
In above-mentioned key warning device, described key warning device also comprise be connected with described control module for controlling to carry out the indicating member indicated by described control module after described switch element closes.
In above-mentioned key warning device, described control module comprises control chip, and the model of described control chip is NE555;
Described switch element comprises normal open switch, described power supply unit comprises direct supply, the positive pole of described direct supply is connected with one end of described normal open switch, and the other end of described normal open switch is connected with " 4 " pin of described control chip and " 8 " pin respectively.
In above-mentioned key warning device, " 2 " pin of described control chip is connected with the negative pole of described direct supply with " 6 " pin.
In above-mentioned key warning device, described control module also comprises the delay adjustment circuit be connected between described normal open switch and described control chip, described delay adjustment circuit is used for the control lag time, described control chip is used at described switch element closed and then control described alarm unit time delay and report to the police, and controls described indicating member simultaneously and indicate.
In above-mentioned key warning device, described delay adjustment circuit comprises the first electric capacity, adjustable resistor and the first resistance, one end of described first electric capacity is connected with the tie point of described normal open switch and described control chip, the other end of described first electric capacity is connected with the moving contact of described adjustable resistor and " 2 " pin of described control chip and " 6 " pin respectively, and the fixed contact of described adjustable resistor is connected to the negative pole of described direct supply through described first resistance.
In above-mentioned key warning device, described alarm unit comprises the second resistance and hummer, one end of described second resistance is connected with " 3 " pin of described control chip, between the other end that described hummer is connected to described second resistance and the negative pole of described direct supply.
In above-mentioned key warning device, described indicating member comprises the 3rd resistance and light emitting diode, described one end of 3rd resistance is connected with " 3 " pin of described control chip, the other end of described 3rd resistance is connected with the anode of described light emitting diode, and the negative electrode of described light emitting diode is connected with the negative pole of described direct supply.
In above-mentioned key warning device, described control module also comprises the second electric capacity be connected between " 5 " pin of described control chip and the negative pole of described direct supply;
" 1 " pin of described control chip is connected with the negative pole of described direct supply, the minus earth of described direct supply.
Implement a kind of key warning device of the present invention, there is following beneficial effect: after key inserts key hole, by utilizing the Action of Gravity Field of box body, conventional switch is closed, report to the police immediately triggering, simultaneously with pilot lamp instruction, therefore and buzzer warning luminous by pilot lamp is to inform that user's key inserts key hole, and only extract key rear indicator light just can not work because of dead electricity, hummer does not send chimes of doom because of dead electricity, extracts key in time with reminding user, reduces property loss.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of a kind of key warning device of the present invention embodiment;
Fig. 2 is the module diagram of tray interior in Fig. 1;
Fig. 3 is the circuit diagram of tray interior first embodiment in Fig. 1;
Fig. 4 is the circuit diagram of tray interior second embodiment in Fig. 1.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
As shown in Figure 1, be the structural representation of a kind of key warning device of the present invention embodiment, this key warning device is articulated in the end of key, can be automotive lock spoon, door lock spoon, cabinet door lock spoon etc.In the present embodiment, the box body 3 that key warning device comprises connecting line 2 (can be general cord) and is connected with one end of connecting line 2, the other end of connecting line 2 is connected with key (end that directly can be tied up to key by key hole).Preferably, this key warning device also comprises the clasp 1 hanging with key, and the upper end of connecting line 2 is connected with clasp 1.This box body 3 inside comprises warning circuit, and this warning circuit comprises the power supply unit 31, switch element 32, control module 33 and the alarm unit 34 that are electrically connected successively, as shown in Figure 2.
Above-mentioned connecting line is connected with switch element 32 through the through hole on box body 3, insert after in key hole when hanging over the key on key warning device, due to the Action of Gravity Field of box body, switch element 32 can be subject to a pulling force straight up by connecting line 2, this value of thrust is greater than a preset value, its preset value is generally about 2N, and now switch element 32 closes.
In the present embodiment, after switch element 32 is closed, the supply access conducting of power supply unit 31 and control module 33, control module 33 controls alarm unit 34 and sends warning, having inserted in key hole with reminding user key thus extracted key in time, after extracting key, control module 33 dead electricity alarm unit 34 does not send warning.
This key warning device also can comprise an indicating member 35 be connected with control module 33, and close at switch element 32, control module 33 controls indicating member 35 and works, identical with the principle controlling alarm unit 34, does not repeat them here.
Above-mentioned control module 33 comprises a control chip (not shown), control chip be used for directly control when switch element 32 closes alarm unit 34 send chimes of doom and control indicating member 35 work.Especially, above-mentioned power supply unit 31, switch element 32, control module 33, alarm unit 34 and indicating member 35 are all integrated on one piece of circuit board, are arranged in box body.
Therefore after key inserts key hole, control module 33 can control alarm unit 34 immediately and report to the police, and indicated by indicating member 35 simultaneously, insert in key hole with reminding user key, pull out key if forget, alarm unit 34 and indicating member 35 can work always, thus reminding user extracts key in time, only after key is extracted, alarm unit 34 and indicating member 35 do not work because of dead electricity.
As shown in Figure 3, for the circuit diagram of tray interior in Fig. 1 first embodiment, switch element 32 is normal open switch K1, particularly, this normal open switch K1 comprises an armature contact and two fixed contacts, be divided into the first fixed contact and the second fixed contact, wherein: the first fixed contact can be understood as the one end being equivalent to normal open switch K1, the second fixed contact is the other end often starting K1.Especially, the armature contact of normal open switch K1 is connected with connecting line 2, and this normal open switch K1 is when the pulling force being subject to connecting line applying is greater than a preset value, and normal open switch K1 just can be in closure state.
In the present embodiment, power supply unit 31 is preferably the direct supply Vdc of 12V, can be provided by some batteries, and the model of control chip is preferably time-base integrated circuit NE555.Alarm unit 34 comprises resistance R2 and hummer B1; Indicating member 35 comprises resistance R3 and light emitting diode D1, and light emitting diode D1 is preferably red light emitting diodes in the present embodiment, but is not limited to this.
Particularly, the positive pole of direct supply Vdc is connected with one end (the first fixed contact) of normal open switch K1, the other end (the second fixed contact) of normal open switch K1 is connected with " 4 " pin of control chip NE555 and " 8 " pin respectively, " 4 " pin is the reset pin of this control chip, " 8 " pin is this control chip power pins, provides required operating voltage by direct supply.
One end of resistance R2 is connected with " 3 " pin of control chip NE555 and output pin, and hummer B1 is connected between the other end of resistance R2 and the negative pole of direct supply Vdc.One end of resistance R3 is also connected with " 3 " pin of control chip NE555, and the other end of resistance R3 is connected with the anode of light emitting diode D1, and the negative electrode of light emitting diode D1 is connected with the negative pole of direct supply Vdc.In addition, " 5 " of this control chip NE555 draws the negative pole that foot meridian capacitor C2 is connected to direct supply Vdc, and " 1 " pin of control chip NE555 is directly connected with the negative pole of direct supply Vdc.
After being articulated in the insertion of the key on key warning device key hole, box body is due to the Action of Gravity Field of self, the armature contact of normal open switch K1 is made to be subject to one of connecting line 2 pulling force straight up, thus normal open switch K1 is closed, after pulling force disappears, normal open switch K1 can get back to normally open, and it is equivalent to a kind of special " pullswitch ".After normal open switch K1 is closed, direct supply Vdc provides supply voltage by " 4 " pin of control chip NE555 and " 8 " pin, now " 2 " pin and " 6 " pin of control chip NE555 are because being connected i.e. ground connection with the negative pole of direct supply Vdc, for low level, then " 3 " pin of control chip NE555 and output pin export high level, and now light emitting diode D1 conducting, is lit, hummer B1 connects direct supply simultaneously, sends chimes of doom.
Therefore, in the present embodiment, as long as key inserts key hole, normal open switch K1 just closes, and " 3 " pin of control chip NE555 just exports high level, alarm unit sends chimes of doom because obtaining electric, be both indicating member because of electric and luminous, insert in key hole with reminding user key, and only after extracting key alarm unit just understand stop alarm, thus make user can extract key in time, avoid property loss.
Especially, above-mentioned control module 33 also comprises the delay adjustment circuit (not shown) be connected between normal open switch K1 and control chip, delay adjustment circuit is used for the control lag time, control chip is used for closing at normal open switch K1 and then controlling alarm unit 34 time delay sending chimes of doom, and control indicating member 35 indicates simultaneously.
As shown in Figure 4, be the circuit diagram of tray interior in Fig. 1 second embodiment, with Fig. 3 unlike, add a delay adjustment circuit, in the present embodiment, delay adjustment circuit comprises electric capacity C1, adjustable resistor Rp and resistance R1.
Particularly, one end of electric capacity C1 is connected with the other end (the second fixed contact) of normal open switch K1, the other end of electric capacity C1 is connected with the moving contact of adjustable resistor Rp and " 2 " pin of control chip NE555 and " 6 " pin respectively, " 2 " pin is the trigger pin of this control chip, " 6 " pin is the threshold value pin of this control chip, and the fixed contact of adjustable resistor Rp is connected to the negative pole of described direct supply Vdc through resistance R1.Especially, electric capacity C1 is electrochemical capacitor, and it has both positive and negative polarity, can not connect anti-in circuit of the present invention.
After being articulated in the insertion of the key on key warning device key hole, box body is due to the Action of Gravity Field of self, make the armature contact of normal open switch K1 be subject to one of connecting line 2 pulling force straight up, thus normal open switch K1 is closed, it is equivalent to a kind of special " pullswitch ".After normal open switch K1 is closed, direct supply Vdc provides supply voltage by " 4 " pin of control chip NE555 and " 8 " pin, now " 2 " pin of control chip NE555 and " 6 " pin are high level, then " 3 " pin of control chip NE555 and output pin output low level, light emitting diode D1 not conducting, hummer B1 does not also work.Afterwards because the positive pole of direct supply is connected to negative pole (i.e. ground connection) by electrochemical capacitor C1, adjustable resistor and swept resistance Rp and resistance R1, direct supply Vdc charges to electrochemical capacitor C1, along with the rising of electric capacity C1, " 2 " pin of control chip NE555 and the voltage of " 6 " pin can along with declines, when voltage drop to threshold value, " 3 " pin of NE555 becomes high level from low level, now light emitting diode D1 conducting, be lit, hummer B1 connects direct supply simultaneously, sends chimes of doom.
Therefore after key inserts key hole, normal open switch K1 closes immediately, supply access conducting between direct supply and control chip, if and delay a period of time after also do not extract key, then under the effect of control chip, control hummer and send warning, light emitting diode is lit simultaneously, thus reminding user key is also inserted in key hole to extract key in time, to avoid potential safety hazard, reduce property loss.
Be respectively Vdc=12V with the value of each components and parts, the maximum value of C1=47 μ F, swept resistance Rp is 470k Ω, R1=10k Ω, C2=0.1 μ F, R2=470 Ω, R3=1k Ω is example, see Fig. 4, under now introducing the specific works schematic diagram of a kind of key warning device of the present invention in detail:
When key warning device is normally placed (not inserting key hole), connecting line does not apply pulling force to normal open switch K1, normal open switch K1 is in normally open always, " 4 " pin of control chip NE555 and " 8 " pin do not connect direct supply Vdc, now " 3 " the pin output low level all the time of this control chip NE555, hummer B1 can not send chimes of doom because of dead electricity, and light emitting diode D1 also can not be lit.
After key inserts key hole, box body makes connecting line (cord) produce certain pulling force upwards due to the Action of Gravity Field of himself, and be connected with connecting line due to the armature contact of normal open switch K1, thus make normal open switch K1 now be in closure state (gravity of box body self is enough to allow normal open switch K1 close), control chip NE555 is powered by direct supply Vdc, at this moment " 2 " pin of control chip NE555 and " 6 " pin are in high level state, " 3 " the pin output low level of NE555, light emitting diode D1 and hummer B1 does not still work.
Along with direct supply Vdc is to the charging of electric capacity C1, the voltage of electric capacity C1 also can along with rising, make the voltage of " 2 " pin of control chip and " 6 " pin along with reduction, when voltage drop is to a threshold value, for 2/3Vdc and 8V, but be not limited to this, this threshold value is determined by " 5 " pin of control chip NE555 and control voltage pin.Now " 3 " pin of control chip NE555 exports high level, and light emitting diode D1 is lit because obtaining electric, and hummer B1 sends chimes of doom because obtaining electric simultaneously.Namely close at normal open switch K1, and after postponing a period of time, control chip NE555 control light emitting diode D1 lights and controls hummer B1 and sends chimes of doom, especially, time delay is decided by the resistance of electric capacity C1 and swept resistance Rp and resistance R1, T=1.1*C1* time delay (Rp+R1), if the value of electric capacity C1 and resistance R1 is fixed, then can directly be regulated by swept resistance Rp this time delay, when normal open switch K1 closed and time delay then, hummer B1 will sound, send chimes of doom, simultaneously with pilot lamp instruction (light emitting diode is lit).If therefore user does not pull out key in time delay in T, hummer will send chimes of doom and extract key in time to point out user.
Implement a kind of key warning device of the present invention, after key inserts key hole, by utilizing the Action of Gravity Field of box body, conventional switch is closed, to report to the police immediately triggering, simultaneously with pilot lamp instruction, therefore and buzzer warning luminous by pilot lamp is to inform that user's key inserts key hole, and only just understands and not work because of dead electricity extracting key rear indicator light, hummer does not send chimes of doom because of dead electricity, extracts key in time with reminding user.In addition, by increasing delay adjustment circuit, make after key inserts key hole, and just realize reporting to the police after postponing a period of time triggering, indicate with pilot lamp simultaneously, its time delay is adjustable, therefore after can realizing key insertion key hole a period of time, send chimes of doom by pilot lamp luminescence and hummer more also to stay in key hole to point out user's key, avoid forgeing and take off key, reduce property loss, circuit structure is simple, practical, and by utilizing the Action of Gravity Field of box body to make conventional switch close, there is unique superiority.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, also can make a lot of form, these all belong within protection of the present invention.
Claims (10)
1. a key warning device, alarm is pulled out with reminding user for forgetting at key, the warning circuit that described key warning device comprises box body (3) and is located in described box body (3), it is characterized in that, described key warning device also comprises connecting line (2), and one end of described connecting line (2) is connected with the switch element (32) of described warning circuit through the through hole on described box body (3).
2. key warning device according to claim 1, it is characterized in that, described warning circuit comprises the power supply unit (31), switch element (32), control module (33) and the alarm unit (34) that are electrically connected successively; When the pulling force that described connecting line (2) puts on switch element (32) is greater than a preset value, described switch element (32) closes; Described control module (33) is reported to the police for controlling described alarm unit (34) after described switch element (32) is closed; Described power supply unit (31) for giving described control module (33) power supply after described switch element (32) is closed.
3. the key warning device according to claim 1-2 any one, is characterized in that, the other end of described connecting line (2) is connected with the end of key.
4. the key warning device according to claim 1-2 any one, is characterized in that, described key warning device also comprises clasp (1), and the other end of described connecting line (2) is connected with described clasp (1).
5. key warning device according to claim 2, it is characterized in that, described key warning device also comprise be connected with described control module (33) for controlling to carry out the indicating member (35) indicated by described control module (33) after described switch element (32) is closed.
6. key warning device according to claim 5, is characterized in that, described control module (33) comprises control chip, and the model of described control chip is NE555;
Described switch element (32) comprises normal open switch (K1), described power supply unit (31) comprises direct supply (Vdc), the positive pole of described direct supply (Vdc) is connected with one end of described normal open switch (K1), and the other end of described normal open switch (K1) is connected with " 4 " pin of described control chip and " 8 " pin respectively.
7. key warning device according to claim 6, is characterized in that, " 2 " pin of described control chip is connected with the negative pole of " 6 " pin with described direct supply (Vdc).
8. key warning device according to claim 6, it is characterized in that, described control module (33) also comprises the delay adjustment circuit be connected between described normal open switch (K1) and described control chip, described delay adjustment circuit is used for the control lag time, described control chip is used at described switch element (32) closed and then control described alarm unit (34) time delay and report to the police, and controls described indicating member (35) simultaneously and indicate.
9. key warning device according to claim 8, it is characterized in that, described delay adjustment circuit comprises the first electric capacity (C1), adjustable resistor (Rp) and the first resistance (R1), one end of described first electric capacity (C1) is connected with the tie point of described normal open switch (K1) and described control chip, the other end of described first electric capacity (C1) is connected with the moving contact of described adjustable resistor (Rp) and " 2 " pin of described control chip and " 6 " pin respectively, the fixed contact of described adjustable resistor (Rp) is connected to the negative pole of described direct supply (Vdc) through described first resistance (R1).
10. the key warning device according to any one of claim 7-9, it is characterized in that, described alarm unit (34) comprises the second resistance (R2) and hummer (B1), described one end of second resistance (R2) is connected with " 3 " pin of described control chip, between the other end that described hummer (B1) is connected to described second resistance (R2) and the negative pole of described direct supply (Vdc);
Described indicating member (35) comprises the 3rd resistance (R3) and light emitting diode (D1), one end of described 3rd resistance (R3) is connected with " 3 " pin of described control chip, the other end of described 3rd resistance (R3) is connected with the anode of described light emitting diode (D1), and the negative electrode of described light emitting diode (D1) is connected with the negative pole of described direct supply (Vdc);
Described control module (33) also comprises the second electric capacity (C2) be connected between " 5 " pin of described control chip and the negative pole of described direct supply (Vdc);
" 1 " pin of described control chip is connected with the negative pole of described direct supply (Vdc), the minus earth of described direct supply (Vdc).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410185267.2A CN104217553A (en) | 2014-05-04 | 2014-05-04 | Key alarming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410185267.2A CN104217553A (en) | 2014-05-04 | 2014-05-04 | Key alarming device |
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| Publication Number | Publication Date |
|---|---|
| CN104217553A true CN104217553A (en) | 2014-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410185267.2A Pending CN104217553A (en) | 2014-05-04 | 2014-05-04 | Key alarming device |
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| CN202084153U (en) * | 2011-05-10 | 2011-12-21 | 哈尔滨师范大学 | Key-reminding electronic doorkeeper |
| CN102456264A (en) * | 2010-10-21 | 2012-05-16 | 上海市静安区第二中心小学 | Alarming device for condition of forgetting to extract key |
| CN202502603U (en) * | 2012-01-17 | 2012-10-24 | 李业宝 | Key-pulling reminder |
| CN202866443U (en) * | 2012-10-27 | 2013-04-10 | 巩传浩 | Anti-left-key-in-door alarm system |
| CN203931119U (en) * | 2014-05-04 | 2014-11-05 | 姚心怡 | A kind of key warning device |
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2014
- 2014-05-04 CN CN201410185267.2A patent/CN104217553A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2354728A1 (en) * | 1976-06-16 | 1978-01-13 | Lebellec Pierre | Key holder with electronic alarm - has alarm circuit, battery and loudspeaker in casing with switch actuated by pulling key chain |
| CN2830590Y (en) * | 2005-11-18 | 2006-10-25 | 贺明 | Overtime warning locking device for lock |
| CN201198674Y (en) * | 2008-05-16 | 2009-02-25 | 无锡职业技术学院 | Prompter for fetching key |
| CN102456264A (en) * | 2010-10-21 | 2012-05-16 | 上海市静安区第二中心小学 | Alarming device for condition of forgetting to extract key |
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Application publication date: 20141217 |
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