JP3500712B2 - Static electricity remover with light emitting function - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static eliminator for preventing a human body from being damaged by electric discharge of static electricity or an electric shock. 2. Description of the Related Art When entering or exiting a room in an office or a hotel where a carpet or the like is laid, there is a case where electric shock or electric shock is generated at the moment of touching a door knob or the like. Especially during the dry season in winter. [0003] This is because the human body is charged with static electricity due to friction between the shoes and slippers and the carpet when walking on the floor on which the carpet is laid. This is an impact caused by the discharge of static electricity from the doorknob to the doorknob. Electrostatic discharge is particularly likely to occur when touching objects with a large surface area such as doors, door frames, window frames, etc.
It is generally known that when a human body is charged to 2 kv or more, stiffness and electric shock due to static electricity are felt. [0004] An instantaneous electrostatic discharge from a human body to a conductor such as a metal causes sibiration and electric shock.
As a method of preventing the electric shock, a method of extending the time of the electrostatic discharge by passing the time of the electrostatic discharge through the high resistance body is adopted. The conventional method employs a static eliminator in which a high resistance body of 1 Mohm or more is connected between an electrostatic output electrode and an electrostatic input electrode. When the user holds the static input electrode of the static eliminator by hand and brings the static output electrode into contact with metal such as a doorknob, the static electricity flows from the human body to the doorknob and the like via a high-resistance body. Static electricity slowly flows through the high-resistance body, so you do not feel stiffness or electric shock. [0005] It has been difficult to confirm whether or not a conventional static eliminator has been neutralized or not. That is, with the conventional static eliminator, it was not possible to confirm whether the contact with the door knob or the like was surely made or whether the contact time was sufficient. For this reason, a method of incorporating a neon tube and a liquid crystal display into the static eliminator, detecting the flow of static electricity, and confirming the elimination of static electricity has been studied. However, the neon tube has a drawback that light is very weak when discharged by static electricity, and that the liquid crystal display is not suitable for use at night. [0006] A method of incorporating a piezoelectric speaker into a static eliminator and confirming the generation and elimination of static electricity by sound has also been tried. However, since the energy of static electricity is very small, the piezoelectric speaker cannot be driven and sound cannot be confirmed. . According to the present invention, an electrostatic input electrode and an electrostatic output electrode are separately installed in a hollow case made of an insulating material. The first to fourth resistors are connected in series, and the connection point of the second and third resistors is connected to the reference voltage point of the first two-input negative OR digital IC among the first to fourth resistors. Connect to the positive electrode of A connection point between the first and second resistors is connected to a first input terminal of the first two-input negative OR digital IC, and a connection point between the third and fourth resistors is connected to the first two-input negative OR circuit. A second input terminal of the OR digital IC, and an output terminal of the first two-input negative OR digital IC is connected to a first input terminal of the second two-input negative OR digital IC. , The second two-input negative OR digital IC
Install the sixth resistor between the input terminal and the positive electrode of the battery
And, the output terminal of the second two-input negative logic OR digital IC connected to the cathode electrode of the light emitting diode, further, the second 2
An output terminal of the input negative OR digital IC and a second two inputs
A fifth resistor is connected between the second input terminals of the negative OR digital IC.
A resistor is connected in series to the input side and a capacitor is connected in series to the output side. Further, the anode electrode of the light emitting diode is connected to the positive electrode of the battery, and the battery is connected to the first and second two-input negative OR digital ICs A gist of the present invention is a static eliminator with a light emitting function, which is connected as a power supply. The present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram of a circuit showing one embodiment of the present invention. Reference numeral 1 denotes a hollow case made of an insulating material. At both ends of the case 1, an electrostatic input electrode 2 and an electrostatic output electrode 3 made of a conductive material are separately attached. In the hollow portion of the hollow case 1, first to fourth resistors connected in series between the static electricity input electrode 2 and the static electricity output electrode 3 are arranged. Further, a first two-input negative OR digital IC 8, a second two-input negative OR digital IC 9, and a battery 10 as a power source of these ICs are also arranged in the hollow portion of the case 1. Among the first to fourth resistors, a second resistor 5 and a third resistor 6
Is connected to the plus side electrode of the battery 10 at the reference voltage point of the first two-input negative-OR digital IC 8, and the connection point of the first resistor 4 and the second resistor 5 is connected to the first two inputs. It is connected to the first input terminal 8a of the negative OR digital IC 8, and the connection point of the third resistor 6 and the fourth resistor 7 is connected to the first two-input negative OR digital IC 48 to the second input terminal 8b. I do.
Output terminal 8 of the first two-input negative OR digital IC 8
c is connected to the first input terminal 9a of the second two-input negative-OR digital IC 9, and the output terminal 9c of the second two-input negative-OR digital IC 9 is a light emitting device disposed inside the case 1 hollow. Connected to the cathode electrode of diode 11. The anode electrode 11b of the light emitting diode 11 is
To the plus side electrode of The cathode electrode 11a of the light emitting diode 11 and a second two-input negative OR digital I
Between the second input terminal 9b of the capacitor C9 and the cathode 12a of the light emitting diode 11, the capacitor 12 and the fifth
Is connected in series with the resistor 13. Further, the fifth resistor 13
And one of the sixth resistors 14 is connected to the second input terminal 9b of the second two-input negative OR digital IC 9 and the other is connected to the positive electrode of the battery 10. The battery 10 is connected to the first two-input negative OR digital IC 8.
And a second two-input negative OR digital IC 9 as a power source. The hole 15 provided in the hollow case 1 is a through hole for emitting the light of the light emitting diode 11 to the outside. As the insulating material forming the hollow case 1, a general-purpose resin can be used. Specifically, polyethene,
Thermoplastic or thermosetting resins such as polypropylene, polyamide, polystyrene, polyester, polyurethane, polycarbonate, polyvinyl chloride, polyepoxy, polyacrylonitrile, acrylonitrile-butadiene-styrene copolymer, and acrylonitrile-styrene copolymer No. The case 1 can be formed from these resins by a method such as injection molding. The conductive material forming the electrostatic input electrode 2 can be a metal, a conductive resin, a conductive rubber, a conductive ceramic, or the like. Its resistance may be less than 10 ¹⁰ ohm-cm. The shape of the static electricity input electrode 2 may be arbitrary, but when the present static electricity eliminator is portable, it is preferable to adopt a shape such as a key holder or a chain. As the conductive material for forming the electrostatic output electrode 3, a metal, a conductive resin, a conductive rubber, a conductive ceramic, or the like can be used as in the case of the electrostatic input electrode 2. In addition, woven and non-woven fabric of stainless steel web and felt, synthetic fiber plated with metal, woven and non-woven fabric of synthetic fiber added with conductive material such as carbon black, foamable conductive polyethylene resin, similar foaming property Conductive urethane resin and the like can be used. The shape of the static electricity output electrode 3 is preferably a fibrous shape because it is preferable to have a large surface area in order to easily discharge static electricity, and it is more preferable that the tip is sharp. Also, the static electricity output electrode 3 arranged in the hollow case 1 can be partially exposed outside the case 1, or a hole can be provided in the case 1 so that the static electricity can be discharged into the air by flowing air. Case 1
When the hole formed in contact with or close to the electrostatic output electrode 3, the discharge can be performed faster. Also, static electricity can be released by directly bringing the electrostatic output electrode 3 exposed to the outside of the case 1 into contact with a conductive object such as a metal door knob, a metal door frame, or the like, or by approaching a hole in the case 1. . The electrostatic input electrode 2 and the electrostatic output electrode 3
The first to fourth resistors connected in series between are used to set the detection sensitivity. The values of the resistors may be the same for all of the first to fourth resistors, or may be different for each. The detection sensitivity can be arbitrarily set by changing the resistance value. The two-input negative OR digital IC
In order to lower the voltage applied to the IC for protection of 8 and 9, the values of the second resistor 5 and the third resistor 6 are compared with the values of the first resistor 4 and the fourth resistor 7. It is better to make it smaller. However, if the values of the second resistor 5 and the third resistor 6 are too small, the detection sensitivity of static electricity is reduced.
It is preferable that the resistance 4 is 4.7 Mohm, the second resistance 5 is 470 Kohm, the third resistance 6 is 470 Kohm, and the fourth resistance 7 is 4.7 Mohm. The two-input negative OR digital ICs 8 and 9
Is used as a switch for turning on the light emitting diode 11 when static electricity is input to the static electricity input electrode 2. Commercially available 2-input negative OR digital I
C includes a TTL type and a CMOS type. However, the TTL digital IC has a drawback that the impedance on the input side is low and a current easily flows, so that the current consumption is large. Therefore, a power supply of 5 V is required for operation. On the other hand, since CMOS operates at 2V to 6V, a general-purpose battery can be used, which is preferable. The light emitting diode 11 is also referred to as an LED for short, and has characteristics such as low power consumption, low voltage operation, little heat generation, and a long life, and is preferable as a light emitting body. Light emitting diode 611 P
A semiconductor element having an N-junction and emitting light due to recombination of electrons and holes when a forward bias is applied. Gallium arsenic, gallium
Phosphorus, gallium-arsenic plus gallium-phosphorus is commonly used. The shape of the light emitting diode 11 is arbitrary, but a general transparent lens type is preferable. The battery 10 includes a first two-input negative OR digital IC 8 and a second two-input negative OR digital I
A power source for operating C9 and for lighting the light emitting diode 11. As the battery 10, a commercially available general-purpose battery can be used. Button batteries, coin batteries, and cylindrical batteries can be used. Primary batteries such as manganese batteries, silver batteries, alkaline batteries, lithium batteries, and air batteries, and secondary batteries such as nickel-cadmium batteries and lead batteries can be used. The hole 15 provided in the hollow case 1 is a through hole for passing the light of the light emitting diode 11 to the outside. The shape and quantity are arbitrary as long as the light can be visually recognized from the outside. Instead of forming the hole 15, the hollow case 1 may be made transparent, or only the periphery of the light emitting diode 11 may be made transparent. In addition, in addition to the above, for example, a manual switch for mechanically connecting and disconnecting a circuit can be added to the static electricity removing device with a light emitting function. By providing this manual switch, it is possible to forcibly turn on the light emitting diode 11 manually when there is no static electricity input, perform a battery check of the battery 10, and use it for lighting. The operation will be described with reference to the electrical connection circuit shown in FIG. C as the first two-input negative OR digital IC 8
A MOS2 input negative OR digital IC (74HC08, manufactured by Toshiba Corporation) was used. When the electrostatic input electrode 2 (nickel-plated stainless steel bar) is in contact with a positively charged body (not shown), the battery 10 (lithium battery, CR201
6, Toshiba Battery Corp.) is used as the reference voltage point of the first two-input negative-OR digital IC 8, so that the input indicated by the first input terminal 8a of the first two-input negative-OR digital IC 8 Becomes a positive (high) level which is full of the positive side clamp level, and the discharge current is changed from the second resistance 5 to the third resistance 6
, The voltage at the second input terminal 8b of the first two-input negative-OR digital IC 8 becomes lower than the battery voltage at the reference voltage point. At this time, when the charge amount of the charged body is sufficiently large, the voltage of the second input terminal 8b becomes lower than the input threshold voltage of the first two-input negative OR digital IC8. Accordingly, the output of the first two-input negative OR digital IC 8 is a negative (low) level output. Conversely, when the electrostatic input electrode 2 is in contact with a negatively charged body (not shown), the voltage of the second input terminal 8b is higher than the battery voltage at the reference voltage point by the positive clamp level. And the voltage of the first input terminal 8a falls below the threshold voltage of the first two-input negative OR digital IC8, and the output of the first two-input negative OR digital IC8 is also negative (low). Level output. When the static electricity input electrode 2 comes into contact with a static electricity charged body (not shown), the static electricity is conducted to the static electricity output electrode 3 (stainless felt, manufactured by Nippon Seisen Co., Ltd.), and the static electricity is discharged and discharged, and the static electricity is removed. Is performed. At this time, the first
When static electricity is input into the two-input negative-OR digital IC 8 for a moment, the output of the second two-input negative-OR digital IC 9 connected thereto becomes a negative (low) level, and the light emitting diode 11 (HLMP-8115, (Yokogawa Hewlett-Packard Co., Ltd.) lights up. When the static electricity is removed, the output terminal 8c of the first two-input negative OR digital IC 8 becomes negative (low) even for a moment.
When the level reaches the level, the capacitor 12 is slowly charged by the resistor 14 of the sixth resistor, and the voltage of the second input terminal 9b of the second 2-input negative OR digital IC 9 gradually increases. When this voltage reaches the input threshold level of the second two-input negative OR digital IC 9, the voltage of the output terminal 9c starts to rise. This is transmitted to the second input terminal 9b via the capacitor 12 and the fifth resistor 13, and
Of the input terminal 9b is further increased. The light emitting diode is turned on until the voltage of the output terminal 9c returns to the positive (high) level, and turns off when the voltage returns to the positive (high) level, that is, when each point returns to the initial state. The fifth resistor 13 is for preventing an excessive current from flowing into the capacitor 12 via the second input terminal 9b of the second two-input negative OR digital IC 9 when returning to the initial state. And connected in series with the capacitor 12. As described above in detail, the static electricity eliminator with a light emitting function according to the present invention can prevent severing and electric shock due to a momentary discharge of static electricity, and also turns on a light emitting diode when static electricity is discharged. By doing so, it is possible to visually check whether or not discharge has occurred, and this is an excellent static eliminator with no anxiety during use.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a circuit showing one embodiment of the present invention. FIG. 2 is an equivalent circuit of FIG. [Description of Signs] 1 Case 2 Static electricity input electrode 3 Static electricity output electrode 4 First resistor 5 Second resistor 6 Third resistor 7 Fourth resistor 8 First two-input negative OR digital IC 8a First Input terminal 8b Second input terminal 8c Output terminal 9 Second two-input negative OR digital IC 9a First input terminal 9b Second input terminal 9c Output terminal 10 Battery 11 Light emitting diode 11a Cathode electrode 11b Anode electrode 12 Capacitor 13 fifth resistor 14 sixth resistor 15 holes

Claims (1)

(57) [Claim 1] An electrostatic input electrode and an electrostatic output electrode are separately installed in a hollow case made of an insulating material, and a first through an electrostatic output electrode are provided between the electrostatic input electrode and the electrostatic output electrode. A fourth resistor is connected in series, and among the first to fourth resistors, the second
And the connection point of the third resistor and the positive electrode of the battery at the reference voltage point of the first two-input negative OR digital IC. First
A connection point between the first and second resistors is connected to a first input terminal of the first two-input negative OR digital IC, and a connection point between the third and fourth resistors is connected to the first two-input negative OR circuit. connected to a second input terminal of the digital IC, further, connected to the first input terminal of said first output terminals of the two-input negative logic OR digital IC second two-input negative logic OR digital IC, the Two-input negative argument
The second input terminal of the RIWA digital IC and the positive terminal of the battery
A sixth resistor is placed between the poles, the output terminal of the second two-input negative logic OR digital IC connected to the cathode electrode of the light emitting diode, further, out of the second two-input negative logic OR digital IC
And a second terminal of the second two-input negative OR digital IC.
Input the fifth resistor between the input terminals and output the capacitor
Side, and the anode electrode of the light emitting diode is connected to the positive electrode of the battery, and the battery is connected as a power source of the first and second two-input negative OR digital ICs. Static eliminator with light emitting function.