CN201208456Y - Static electricity earthing device of electrostatic prevention hand ring - Google Patents
Static electricity earthing device of electrostatic prevention hand ring Download PDFInfo
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- CN201208456Y CN201208456Y CNU2008200377879U CN200820037787U CN201208456Y CN 201208456 Y CN201208456 Y CN 201208456Y CN U2008200377879 U CNU2008200377879 U CN U2008200377879U CN 200820037787 U CN200820037787 U CN 200820037787U CN 201208456 Y CN201208456 Y CN 201208456Y
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Abstract
The utility model discloses a static grounding device of an antistatic wrist strap. The static grounding device is characterized in that the static grounding device comprises a connecting circuit used for connecting the antistatic wrist strap with a shelter, a detecting circuit used for detecting the connective state of the antistatic wrist strap, and a warning circuit used for warning when the connection of the antistatic wrist strap is broken, wherein, the supply input negative terminal of the connecting circuit is connected with the negative electrode of the supply power of the static grounding device through a switch, the supply input positive terminal of the connecting circuit is connected with the first input terminal of the detecting circuit, the second input terminal of the detecting circuit is connected with the positive electrode of the supply power, and the input terminal of the detecting circuit is connected with the input terminal of the warning circuit. The static grounding device can detect the poor connection of the antistatic wrist strap or the poor grounding of the ground connection in time, and sends warning signals to inform the operating personnel to change and repair the antistatic wrist strap or the ground connection, thereby avoiding the obsolescence of a microelectronic product.
Description
Technical field
This utility model relates to a kind of antistatic protection device that microelectronic component workshop operator uses, and is specifically related to a kind of electrostatic grounding device of antistatic bracelet.
Background technology
It is found that the today in that microelectric technique, super large-scale integration develop rapidly, usually scraps owing to operator's static electrification causes microelectronic product in the manufacturing shop.In order to eliminate the harm of electrostatic charge, the method that generally adopts is to wear an antistatic bracelet that metal electrode is housed to operator at present, electrode is connected with ground strap by earth lead, will be by the ground strap the earth of releasing rapidly when electrostatic charge produces.After but the antistatic bracelet used a period of time, the copper wire of its earth lead inside will fracture unconsciously, and the leakage path of electrostatic charge is interrupted, and caused product to scrap in a large number.For this reason, must develop a kind of grounding device of antistatic bracelet, in a single day copper wire fractures when antistatic bracelet earth lead inside, and this grounding device can send alarm signal immediately, informs that operator in time change the earth lead of antistatic bracelet.
The utility model content
The purpose of this utility model just is to provide a kind of can detect the whether electrostatic grounding device of effective grounding of antistatic bracelet automatically, when earth lead fracture that detects the antistatic bracelet or imperfect earth, can in time send alarm signal.
For achieving the above object, this utility model adopts following technical scheme:
A kind of electrostatic grounding device of antistatic bracelet; it is characterized in that comprising the connecting circuit that is used to connect antistatic bracelet and protection ground; be used to detect the testing circuit of antistatic bracelet connection status and the warning circuit that when described antistatic bracelet connects disconnection, is used to report to the police; the power supply input negative terminal of described connecting circuit is connected by the negative pole of switch with the power supply of electrostatic grounding device; the power supply input anode of connecting circuit is connected with the first input end of testing circuit; second input of testing circuit is connected with the positive pole of described power supply, and the outfan of testing circuit is connected with the input of warning circuit.
The electrostatic grounding device of this utility model antistatic bracelet comprises connecting circuit, testing circuit, warning circuit, after the antistatic bracelet is connected on the connecting circuit, promptly is connected with earth lead bus-bar (protection ground).Testing circuit is used for detecting the connection status of antistatic bracelet and the state of ground connection, if the connection conductor cord disconnection of antistatic bracelet, when not connecting situations such as antistatic bracelet, earth lead fail to be connected with the earth lead bus-bar really, earth lead fracture, then start warning circuit and send alarm signal.
The power supply of this utility model electrostatic grounding device can be designed to adopt battery powered mode, also can adopt external AC-DC power supply power supply.
The beneficial effects of the utility model are:
1. this utility model can in time detect the connection status of antistatic bracelet and the state of ground connection by testing circuit, when antistatic bracelet bad connection or ground connection condition of poor occurring, can send alarm signal by starting warning circuit, the notifying operation personnel in time change repairing, avoid scrapping of microelectronic product.
2. connecting circuit of the present utility model is provided with adapter, prevents the electrostatic grounding device current in loop human body of flowing through, and has played good insulation blocking effect.
3. this utility model circuit design advanced person, energy consumption is extremely low; Application device is few, and is with low cost; Power supply can adopt battery or external AC-DC power supply, and is flexible and convenient to use.
Description of drawings
Below in conjunction with the drawings and specific embodiments this utility model is further elaborated.
Fig. 1 is a structured flowchart of the present utility model.
Fig. 2 is the schematic diagram of connecting circuit, testing circuit, warning circuit.
Fig. 3 is the schematic diagram of power indicating circuit.
The specific embodiment
As shown in Figure 1; a kind of electrostatic grounding device of antistatic bracelet; comprise the connecting circuit 1 that is used to connect antistatic bracelet and protection ground, the testing circuit 2 and the antistatic bracelet that are used to detect antistatic bracelet connection status connect the warning circuit 3 that is used to report to the police when disconnecting.The power supply input negative terminal of connecting circuit 1 is connected by the negative pole of K switch with the power supply G of electrostatic grounding device, the power supply input anode of connecting circuit 1 is connected with the first input end of testing circuit 2, second input of testing circuit 2 is connected with the positive pole of power supply G, and the outfan of testing circuit 2 is connected with the input of warning circuit 3.The electrostatic grounding device also comprises power indicating circuit 4, is powered by power supply G.
As shown in Figure 2, connecting circuit 1 comprises socket XS; 1 foot of socket XS is as the power supply input anode of connecting circuit 1, and 2 feet link to each other with 3 feet and are connected with protection ground PE as the power supply input negative terminal of connecting circuit 1 and by the 9th resistance R 9, are connected with adapter between 1 foot and 2 feet.Testing circuit 2 comprises first resistance R 1, second resistance R 2, the 3rd resistance R 3, first capacitor C 1 and the first NAND gate U1A, first resistance R 1 is connected with second resistance R 2, the other end of first resistance R 1 is as the first input end of testing circuit 2, the other end of second resistance R 2 is as second input of testing circuit 2, first resistance R 1 is connected the first input end of the first NAND gate U1A with the junction point of second resistance R 2, one end of the 3rd resistance R 3 connects second input of the first NAND gate U1A, the other end of the 3rd resistance R 3 connects the outfan of the first NAND gate U1A, first capacitor C 1 is connected between second input and signal ground SG of the first NAND gate U1A, and the outfan of the first NAND gate U1A is as the outfan of testing circuit 2.Warning circuit 3 comprises the second NAND gate U2A, the 5th resistance R 5, the 4th resistance R 4, first LED 1, transistor V1 and speaker B, two inputs of the second NAND gate U2A are connected as the input of warning circuit 3, the outfan of the second NAND gate U2A connects the base stage of transistor V1 by the 5th resistance R 5, the emitter stage of transistor V1 meets signal ground SG, its colelctor electrode connects the input of speaker B, the anodal VCC of another input termination power supply of speaker B, one end of the 4th resistance R 4 connects the anodal VCC of power supply, the other end connects the positive pole of first LED 1, and the negative pole of first LED 1 connects the colelctor electrode of transistor V1.In this specific embodiment, the voltage of power supply G is 6V, adopts 2 joint 3V battery powered, and power supply also can adopt external AC-DC power supply power supply.
As shown in Figure 3, power indicating circuit 4 comprises the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, second capacitor C 2, diode D, second LED 2 and the 3rd NAND gate U3A, two inputs of the 3rd NAND gate U3A meet signal ground SG by second capacitor C 2, the outfan of the 3rd NAND gate U3A connects second LED, 2 positive poles by the 8th resistance R 8, the negative pole of second LED 2 meets signal ground SG, be attempted by between the input and outfan of the 3rd NAND gate U3A after the 6th resistance R 6 and 7 series connection of the 7th resistance R, diode D is in parallel with the 7th resistance R 7, and the positive pole of diode D connects the junction point of the 6th resistance R 6 and the 7th resistance R 7.Power indicating circuit 4 is powered by power supply.
Provided the preferred typical model parameter of each components and parts among the figure.In this specific embodiment, the first NAND gate U1A, the second NAND gate U2A, the 3rd NAND gate U3A are respectively NAND gate in the three NAND gate integrated device 74HC132 type cmos digital integrated circuits, and power consumption is very low; Diode D selects 1N4148 for use; Transistor V1 selects 9013 for use.
During this utility model work, elder generation is with 1 foot of the earth lead plug insertion socket XS of antistatic bracelet and the adapter between 2 feet, connect K switch, then the first input end of the first NAND gate U1A places low level, its outfan is a high level, by becoming low level behind the second NAND gate U2A, transistor V1 ends, so first LED 1 and speaker B all do not work.Second LED, the 2 beginning green lights of power indicating circuit are glittering, represent working properly.Broken string takes place or extract when causing antistatic bracelet and grounding device bad connection when the antistatic bracelet connects lead, the first input end of the first NAND gate U1A places high level, its outfan output continuous oscillation signal make first LED, 1 blinking red lamp, and speaker B reports to the police; If when earth lead fracture or imperfect earth, first LED 1 and speaker B also send sound and light alarm immediately.Must change this moment and can work on after the antistatic bracelet connects lead or inspection earthing line.
Claims (6)
1. the electrostatic grounding device of an antistatic bracelet; it is characterized in that comprising the connecting circuit (1) that is used to connect antistatic bracelet and protection ground; be used to detect the testing circuit (2) of antistatic bracelet connection status and the warning circuit (3) that when described antistatic bracelet connects disconnection, is used to report to the police; the power supply input negative terminal of described connecting circuit (1) is connected with the negative pole of the power supply of electrostatic grounding device by switch (K); the power supply input anode of connecting circuit (1) is connected with the first input end of testing circuit (2); second input of testing circuit (2) is connected with the positive pole of described power supply, and the outfan of testing circuit (2) is connected with the input of warning circuit (3).
2. the electrostatic grounding device of antistatic bracelet according to claim 1 is characterized in that described connecting circuit (1) comprises socket (XS); 1 foot of socket (XS) is as the power supply input anode of connecting circuit (1), and 2 feet link to each other with 3 feet and are connected with described protection ground (PE) as the power supply input negative terminal of connecting circuit (1) and by the 9th resistance (R9), are connected with adapter between 1 foot and 2 feet.
3. the electrostatic grounding device of antistatic bracelet according to claim 1, it is characterized in that described testing circuit (2) comprises first resistance (R1), second resistance (R2), the 3rd resistance (R3), first electric capacity (C1) and first NAND gate (U1A), first resistance (R1) is connected with second resistance (R2), the other end of first resistance (R1) is as the first input end of testing circuit (2), the other end of second resistance (R2) is as second input of testing circuit (2), first resistance (R1) is connected the first input end of first NAND gate (U1A) with the junction point of second resistance (R2), one end of the 3rd resistance (R3) connects second input of first NAND gate (U1A), the other end of the 3rd resistance (R3) connects the outfan of first NAND gate (U1A), first electric capacity (C1) is connected between second input and signal ground (SG) of first NAND gate (U1A), and the outfan of first NAND gate (U1A) is as the outfan of described testing circuit (2).
4. the electrostatic grounding device of antistatic bracelet according to claim 1, it is characterized in that described warning circuit (3) comprises second NAND gate (U2A), the 5th resistance (R5), the 4th resistance (R4), first light emitting diode (LED1), transistor (V1) and speaker (B), two inputs of second NAND gate (U2A) are connected as the input of described warning circuit (3), the outfan of second NAND gate (U2A) connects the base stage of transistor (V1) by the 5th resistance (R5), the emitter stage of transistor (V1) connects signal ground (SG), its colelctor electrode connects an input of speaker (B), another input termination power supply positive pole of speaker (B), one end of the 4th resistance (R4) connects the power supply positive pole, the other end connects the positive pole of first light emitting diode (LED1), and the negative pole of first light emitting diode (LED1) connects the colelctor electrode of described transistor (V1).
5. the electrostatic grounding device of antistatic bracelet according to claim 1, it is characterized in that described electrostatic grounding device also comprises power indicating circuit (4), described power indicating circuit (4) is powered by power supply, comprise the 6th resistance (R6), the 7th resistance (R7), the 8th resistance (R8), second electric capacity (C2), diode (D), second light emitting diode (LED2) and the 3rd NAND gate (U3A), two inputs of the 3rd NAND gate (U3A) connect signal ground (SG) by second electric capacity (C2), the outfan of the 3rd NAND gate (U3A) connects second light emitting diode (LED2) positive pole by the 8th resistance (R8), the negative pole of second light emitting diode (LED2) connects signal ground (SG), be attempted by between the input and outfan of the 3rd NAND gate (U3A) after the 6th resistance (R6) and the 7th resistance (R7) series connection, diode (D) is in parallel with the 7th resistance (R7), and the positive pole of diode (D) connects the junction point of the 6th resistance (R6) and the 7th resistance (R7).
6. the electrostatic grounding device of antistatic bracelet according to claim 1 is characterized in that described power supply adopts battery or AC-DC power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200377879U CN201208456Y (en) | 2008-06-20 | 2008-06-20 | Static electricity earthing device of electrostatic prevention hand ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200377879U CN201208456Y (en) | 2008-06-20 | 2008-06-20 | Static electricity earthing device of electrostatic prevention hand ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201208456Y true CN201208456Y (en) | 2009-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200377879U Expired - Fee Related CN201208456Y (en) | 2008-06-20 | 2008-06-20 | Static electricity earthing device of electrostatic prevention hand ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201208456Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798771A (en) * | 2011-05-27 | 2012-11-28 | 神讯电脑(昆山)有限公司 | Portable antistatic alarm |
| CN103278723A (en) * | 2013-03-19 | 2013-09-04 | 深圳市华星光电技术有限公司 | Electrostatic protection chip detecting device and method |
| CN103837788A (en) * | 2012-11-22 | 2014-06-04 | 深圳市海洋王照明工程有限公司 | Alarm circuit |
| CN106997018A (en) * | 2017-05-17 | 2017-08-01 | 苏州泰克银纤维科技有限公司 | A kind of detection means of human body grounding product ground state |
-
2008
- 2008-06-20 CN CNU2008200377879U patent/CN201208456Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798771A (en) * | 2011-05-27 | 2012-11-28 | 神讯电脑(昆山)有限公司 | Portable antistatic alarm |
| CN103837788A (en) * | 2012-11-22 | 2014-06-04 | 深圳市海洋王照明工程有限公司 | Alarm circuit |
| CN103278723A (en) * | 2013-03-19 | 2013-09-04 | 深圳市华星光电技术有限公司 | Electrostatic protection chip detecting device and method |
| CN103278723B (en) * | 2013-03-19 | 2016-06-15 | 深圳市华星光电技术有限公司 | The detecting device of electrostatic protection chip |
| CN106997018A (en) * | 2017-05-17 | 2017-08-01 | 苏州泰克银纤维科技有限公司 | A kind of detection means of human body grounding product ground state |
| CN106997018B (en) * | 2017-05-17 | 2024-04-02 | 苏州泰克银纤维科技有限公司 | Detection device for grounding state of human body grounding product |
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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: 20090318 Termination date: 20140620 |
|
| EXPY | Termination of patent right or utility model |