JP2008078021A - Spectacle with electrostatic eliminator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To develop a spectacle with an electrostatic eliminator that executes internal discharge in the electrostatic eliminator incorporated into the spectacle and achieves static elimination capable of coping with even electrostatic charge of about 70 V. <P>SOLUTION: In order to eliminate static electricity charged in a human body, the spectacle with the electrostatic eliminator is composed as follows. A static elimination circuit composed of elements for converting static electricity into heat or light such as a surge absorber, a varistor, and a discharge tube, is incorporated. A conductive material is used for input terminals of the circuit. Each input terminal is installed inside each temple, each ear bend, and each pad or the like of a spectacle frame so as to be in contact with the human body. Each output terminal of the circuit is mounted so as not to be in contact with the human body while using a metal core of each temple, a coil-shaped metal or a conductive fiber for the terminal. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention incorporates a static eliminator into a spectacle frame and can naturally remove static electricity simply by wearing the spectacles, preventing pain during discharge from the human body, ignition / explosion due to discharge, IC chip breakage, electronic circuit The present invention relates to glasses with a static eliminator intended to prevent static electricity damage such as noise generation.

  Recently, when customers automatically refuel at a self-service gas station, there is an increasing number of accidents that ignite statically vaporized gasoline. It is necessary to remove static electricity by touching the static eliminator before refueling, but most of them are caused by forgetting to do so. In some cases, after touching the static eliminator, they returned to the car to pick up forgotten items, touched their seats, and ignited when trying to start automatic refueling again. In this example, the static electricity has moved from the seat to the human body.

  Chemical fiber is used in various places including clothing. Although it depends on the object, generally, chemical fibers are more likely to generate static electricity than natural fibers (for example, cotton). When the humidity is high as in summer, even if static electricity is generated, it is naturally discharged into the atmosphere and there is almost no static electricity damage. However, when the humidity is low as in winter, it is difficult to discharge into the atmosphere, and human body charging due to clothing friction and human body charging due to touching charged objects are likely to occur. For example, nylon is charged with a positive charge by friction, and Teflon (registered trademark) is charged with a negative charge.

  As shown in (1) of FIG. 1, when a distorted object is charged, a sharp portion collects more static electricity than a wide portion, and the electric field becomes stronger. For this reason, when the amount of electricity increases, a discharge occurs at a sharp point, and the surrounding air is ionized. This is corona discharge. When a discharge occurs, the amount of electricity in the object decreases and the discharge stops. Under such circumstances, when a grounded metal frame is brought close to a charged substance, electricity different from the charge of the object is generated on the surface of the metal frame. When the metal frame is brought closer as shown in (2), more electric charge is collected at the tip portion and discharge becomes easier. When a corona discharge occurs, the ionized air is combined with the charge on the dissimilar poles of the metal frame and neutralized. When a discharge occurs, the amount of electricity discharged is emitted from the object, so the total amount of electricity in the object decreases. A device that performs static elimination by such a mechanism is a self-discharge type static eliminator.

It is because corona discharge occurs that discharge occurs when a finger is brought close to a door knob or a car door on a dry day. In particular, discharge is likely to occur at sharp points such as fingers. If the voltage is small, the electric field is small, so that no discharge occurs. When the door knob is touched, the charge of the human body moves to the door knob and is discharged from the human body. The charging voltage of the human body and the degree to which the human body feels have the following relationship.
1kV or less… I don't feel at all 2kV… I feel a slight discharge on the outside of my finger 3kV… I feel pain like a needle stuck 5kV… I feel lightning and pain in my palm and forearm 10kV… Electric shock and pain in my whole hand Note that kV represents 1000 volts (kilovolts). It is said that an electric shock occurs when touching a metal part of a door knob or an automobile door at 2 kV to 3 kV (in the case of static electricity, it is generally not electrocuted because the voltage is high but the current is small) . Degradation and breakage of semiconductors occur even at several hundred volts or less.

  There is a static discharger (static discharger) as a charge removal using corona discharge. This is a device that discharges electrostatic charges into the air, and discharges from the tip of the conductor. For example, in the case of an airplane, there are generally a rod shape having a diameter of several millimeters and a length of about several tens of centimeters, and there are a relatively large resistance type (high resistance type) and a relatively small type (low resistance type). The former is used for large machines and the latter is used for small machines. The tip of the discharge cable is pointed to facilitate discharge.

  A thread made of conductive fiber may be used to prevent the human body from being charged. Conductive fibers are made of special yarn mixed with materials such as metals and carbon that can easily flow electricity. In order to conduct electricity like metal, they are used in work clothes such as factories that handle semiconductors and highly volatile chemicals. It is used. There are also products woven into clothing such as skirts, stockings and dresses. These products utilize the property that conductive materials are less likely to cause static electricity. Even if the human body is charged, it can be discharged to the outside through the conductive fiber at a low voltage.

  It can be removed by grounding, but it is difficult to consciously ground constantly in normal life. Therefore, various devices have been made to eliminate static electricity without grounding. In “Static Eliminator” of Patent Document 1, an electrostatic charged body is contacted, a pair of conductor pieces are fixed via an insulator, and a varistor, a discharge tube, and an air gap are provided between the pair of conductor pieces. The static electricity is removed by conducting the conductive connection alone or in combination, and discharging and absorbing the static electricity in the circuit. By mounting the apparatus on an electronic device or the like, noise and damage of the electronic circuit of the device are prevented. In addition, static electricity can be removed from the human body by attaching it to a mobile phone. Since the discharge is a discharge inside the varistor element, it is a feature of the present invention that there is no influence on the outside.

  The “static discharge prevention device” of Patent Document 2 takes a method of discharging generated static electricity to a battery. In addition, a closed circuit composed of a battery, a transistor, a diode, and an electrostatically charged body is created to discharge static electricity at a low voltage, thereby preventing an increase in static electricity pressure. It differs greatly from the static eliminator of Patent Document 1 in that a battery having an electromotive force is used.

  As a static electricity prevention measure applied to the glasses, there is a “static elimination device” of Patent Document 3. In this method, a fibrous static electricity neutralizing member made of a conductive substance is attached to a temple, and static elimination is performed by self-discharge without grounding. Basically, static elimination is based on the same principle as clothing made of conductive fibers.

  Products intended for static elimination from human body include static elimination rings, static elimination key chains, and photon static elimination stripes for mobile phones. Many of these products are in-air discharge type using a conductive fiber or discharge tube type. Some types generate ions with an ion generator or collect ions in the atmosphere to remove charged static electricity.

  The surge absorber (surge absorbing element) is a discharge type element having a micro gap. For example, an insulator (core) is sandwiched between electrodes (both terminals: conductor), the surface of the insulator is covered with a conductive film, and a spiral groove (helical gap) is carved in the conductive film. A microgap is made by carving several grooves (linear gaps) parallel to the electrode direction. Since the conductor is cut at the intersection of the helical gap and the linear gap, it normally functions as an insulator. However, when a certain voltage is exceeded, a discharge occurs between the gaps and a current flows. As the number of intersecting portions increases, the discharge start voltage can be increased. There is also a surge absorber in which a special gas is sealed inside the terminal to form a micro gap. The latter is structurally simpler than that using a helical gap and a linear gap, and the discharge start voltage (operating voltage) can be easily controlled.

A varistor is a device that has a characteristic that when a voltage exceeds a certain voltage, its resistance value suddenly decreases and current flows. This characteristic makes it possible to keep the surge voltage constant. As a material having this characteristic, a rare earth-added zinc oxide-based material is used. Since the surge voltage can be controlled, the varistor is also positioned as a kind of surge absorber.
JP 2004-047475 A JP-A-8-180996 JP-A-9-260091

  The human body is charged with static electricity of about 6 kV. When this voltage is reached, not only electric shock due to electric discharge but also damage to electronic circuits such as IC chips and semiconductors is caused. In addition, the generation of noise due to electrostatic discharge may cause errors and malfunctions of OA equipment, computers, and electronic equipment. In addition, sparks generated by electrostatic discharge at sites such as chemical factories, pharmaceutical factories, and gas stations can cause fires due to ignition of volatile gases and organic solvents and powder explosions. For these reasons, antistatic measures for preventing static electricity have become popular.

  Spontaneous discharge to the atmosphere by a conductor is the simplest method of static elimination and is effective in the case of high-voltage static electricity. However, there is a risk of damage to others due to natural discharge, and it is not an effective method for low voltage. In addition, the semiconductor may be deteriorated or damaged even by a low voltage of several hundred volts or less. In the case of glasses with a conductive material incorporated in a frame proposed in “Static Removal Device” of Patent Document 3, the glass is naturally discharged into the atmosphere through the conductive material. The cause of the ignition of the powder cannot be prevented.

  Therefore, the problem to be solved by the present invention is to develop glasses with a static eliminator that can perform static discharge within the static eliminator incorporated in the glasses and can also eliminate static electricity that can handle static charges of about 70V. is there.

  In order to solve the problem to be solved by the above invention, the discharge is performed using a discharge type surge absorber, varistor, and discharge tube. These elements are assembled as an electronic circuit alone or in combination and covered with an insulator case. The electronic circuit is provided with an input terminal and an output terminal, and the input terminal side is connected to a conductive material through a conductor such as a conducting wire, and is set on the glasses so that the conductive material touches the human body. For example, it is installed on the modern part of the temple that hangs on the ear or inside the pad (the part that hits the nose). On the other hand, the output terminal side is connected to a coil or conductive fiber made of a conductor to form a discharge antenna. In addition, when a metal frame is used, it is possible to connect the output terminal to the metal frame of the glasses. However, the discharge antenna must be installed in a position where it does not touch the human body. The above is the glasses with the static eliminator of claim 1.

  According to a second aspect of the present invention, in the electronic circuit of the glasses with the static eliminator according to the first aspect, two or more elements having different operating voltages among the surge absorber, the varistor, the discharge tube, the capacitor, and the like are configured as a parallel circuit. It is characterized by. Surge absorbers and varistors also function as a kind of capacitor. By making these elements into parallel circuits, one circuit can be used as a capacitor with a large capacity. In addition, a wide range of voltages can be handled by using elements corresponding to different operating voltages.

  In the present invention, the static eliminator is incorporated in the glasses. For this reason, the static electricity charged on the body can be removed naturally only by wearing glasses. In addition, since the electrostatic discharge is absorbed by the static eliminator in the glasses, external spark discharge can be controlled. Therefore, the effects obtained by using the present invention are as follows.

1) Static electricity can be removed by simply wearing glasses without realizing it. For this reason, it is possible to avoid discomfort such as electric shock accompanying static electricity discharge that frequently occurs during the dry season in winter.
2) Since a power source is not required unlike a static electricity removing apparatus using ions, it is possible to reduce the size and to make the glasses inexpensive and lightweight.
3) It is also possible to enclose all static eliminator by discharge absorption in the glasses frame, and the product can be processed in the same form as conventional glasses. Moreover, since it is an electric discharge in an apparatus, the danger of the ignition to flammable chemical substances, such as gasoline, can be removed. It also prevents damage to electronic circuits, malfunctions, and noise.
4) By connecting elements such as capacitors, surge absorbers, varistors, discharge tubes, etc. to a parallel circuit and using elements having different operating voltages (discharge starting voltages), it is possible to respond quickly from small voltages to large voltages. In particular, it is possible to cope with a low voltage surge by using a surge absorber that discharges even at about 70V.
5) Since the surge absorber and varistor act as a capacitor below the operating voltage, connecting the capacitor and the element in parallel creates a capacitor with a high capacitance, and can store a large amount of electricity at the same time. However, discharge starts from the element that exceeds the operating voltage, and participates in the removal of static electricity. Therefore, the device can be used repeatedly and stably without undue stress on the device and without damaging the device. That is, a circuit having a long lifetime can be obtained.

  The best mode for carrying out the present invention will be described with reference to the drawings. First. The elements used in the present invention are surge absorbers, varistors, and discharge tubes. As mentioned earlier, varistors and discharge tubes are surge absorbers in a sense. Surge means “a voltage rises temporarily in a short time”, and a surge absorber is “a component that absorbs a surge”. The surge that raises the voltage used in the present invention is static electricity. The purpose of the present invention is to discharge and absorb it. Static electricity can flow to a large object like the earth, but it stays on a charged object on a dry atmosphere or insulator. If you touch a door knob while being charged with static electricity, a discharge will occur the moment you touch it, and an electric shock will be transmitted to your body. In order to avoid this, a surge absorber is an element that reduces the voltage generated by static electricity. As mentioned in the background art, there are several types, but in the present invention, a microgap discharge type as shown in FIG. 2 is used. The basic structure of the surge absorber 1 includes an electrode 103 made of a conductor in a glass case 101 that is an insulator, and there is a gap between both electrodes, and a special gas 102 is filled in the gap. This gap is the micro gap 102. That is, the basic structure and function are the same as the capacitor. When a strong voltage exceeding the electric capacity is applied, a discharge occurs between both electrodes, and the voltage drops again after the discharge. The voltage at the start of this discharge is called “operation voltage” or “withstand voltage”.

FIG. 3 is an example of a circuit using a surge absorber. 1 is a surge absorber, 2 is a capacitor, and R is a resistor. When the respective electric capacities are C1 and C2, and the electric resistance is R, the combined electric capacity C is C = C1 + C2.
The time T until the capacitor is charged is T = kRC (k is a constant)
It is. On the other hand, the voltage rises as shown in FIG. V0 in FIG. 4 is a voltage received from the input side i. However, if the voltage V0 is equal to or higher than the operating voltage Vmax of the surge absorber 1, discharge starts before reaching V0 as shown in FIG. It is predicted that the discharge cycle T ′ at this time is proportional to kRC1. By constructing the circuit so that the voltage rise until charging draws a curve, it can be prevented from being directly applied to the high voltage element, and the element is prevented from being damaged.

  FIG. 6 shows a configuration and dimension example when the surge absorber and the capacitor are housed in an insulator case. Resistors and wiring are omitted. The static eliminating device 9 is housed in an insulator case. Terminal connection pattern portions 901 (input terminals) and 902 (output terminals) are conductors, the former being a side touching the body, and the latter being a side connected to an antenna or conductive fiber. The apparatus of FIG. 6 is an example in which the circuit is housed in a rectangular case of 7.0 × 4.0 × 0.8 mm. In this example, a surge absorber 1 having a cylindrical shape having a length of 3.4 mm and a radius of 1.5 mm is used, and a capacitor 2 having a size of 1.6 × 0.8 × 0.5 mm is used. FIG. 7 shows an example in which the length is shortened by bending into an L shape. I'll touch on how to set the glasses later, so I'll explain a little more about the elements and circuits.

  The varistor has a characteristic that it has a high resistance value at a low voltage, and when a voltage higher than the operating voltage is applied, the resistance value decreases and a current flows. This operating voltage is called a varistor voltage. When the varistor voltage is reached, a current flows at once, and the voltage is lowered and made constant in the form shown in FIG. A material such as a rare earth-doped zinc oxide is used for the varistor. Since the varistor works as a material having a high resistance value below the varistor voltage, it works as a kind of capacitor below the varistor voltage. Incidentally, in the case of a capacitor, it is irregular as shown in FIG. 9, and the reaction to lower the voltage is slow. There is a meaning to use a varistor there. Note that when current flows through the varistor, heat is generated because it is the same as when current flows through the resistor. That is, electric energy is converted into thermal energy.

  On the other hand, a discharge tube such as a neon tube (neon lamp) converts electrical energy into light. When the discharge tube reaches a certain voltage, the discharge starts and emits light. Therefore, the discharge tube can also reduce the surge voltage. For this reason, varistors and discharge tubes are also a kind of surge absorber. However, in the present invention, a surge absorber, a varistor, and a discharge tube are distinguished for convenience. In particular, the surge absorber and discharge tube used in the present invention are called switching types, and once the current flows (discharges), the voltage is suddenly lowered. However, the operating voltage is not stable. On the other hand, the varistor is called a clamping type, and is characterized by maintaining a constant operating voltage (varistor voltage). As a basic circuit, a circuit in which the surge absorber 1 in FIG. 3 is replaced with a varistor or a discharge tube can be used. However, due to the characteristics of each, there are places where this cannot be determined. Therefore, as a circuit using each characteristic, there can be a circuit in which elements having different characteristics are connected in parallel as shown in FIG. 1a is a surge absorber with an operating voltage of 70V, 1b is a surge absorber with an operating voltage of 100V, 1c is a surge absorber with an operating voltage of 300V, 4 is a varistor, and 5 is a discharge tube (neon tube). 100V surge absorber, 300V surge absorber, varistor, etc. operate simultaneously when static electricity cannot be processed with a 70V surge absorber in a short time, such as when a high voltage is momentarily applied by touching a charged substance. Can be absorbed and discharged.

  FIG. 11 shows metal frame glasses. In the case of the metal frame glasses 8, the pad 803 and the modern 806 are usually portions that touch the skin, and materials such as plastic are used to soften the contact with the skin. Plastic is also an insulator and is suitable for embedding the static eliminator of the present invention. In the case of rimless glasses (the rim is the portion 802 in the figure), the pad and the modern are usually used in the same manner as in FIG. Modern is not used in the case of plastic frames, but the modern part is part of the temple and is made of plastic. When you wear glasses, the place where you hit the skin is basically the modern and the pad part, and the rest is away from the skin. However, when the padless or the pad is small, the bridge 804, the pad 803, and the periphery thereof may touch the skin. In the case of glasses that do not fit, the modern is short and part of the temple 805 may touch the skin. When using the metal part as an antenna with metal frame glasses, care must be taken in designing. Let's look at a concrete example.

    FIG. 12 shows an example in which the static eliminator 9 is attached to the modern 806. At this time, the output terminal o is connected to a metal (conductive) temple 805, and the input terminal i is attached so as to touch the inside of the plastic modern 806, that is, the skin. As a result, the entire metal frame functions as an antenna. The larger the antenna part, the more stable it works. Therefore, it is a form suitable for metal frame glasses. However, as I mentioned earlier, if the output side is always in contact with the human body, the neutralization effect cannot be obtained, so pay attention to the modern length, pad size and mounting position, and wear glasses. It is necessary to keep the metal from touching the skin.

  FIG. 13 shows an example in which a static electricity removing device is incorporated in a temple using glasses with a plastic frame. (1) is a side view of a plastic temple 810. FIG. A static eliminator 9 is incorporated in the temple end 811. The output terminal o is connected to the conductive coil o2 through the lead wire o1. This coil serves as an antenna. On the other hand, the input terminal i is connected to the contact input plate i2 through the lead wire i1. The contact input plate is made of a conductor such as metal or conductive fiber, and becomes a part that touches the skin. This is the same as the input terminal i in FIG. Since the portion that comes into contact with the skin is designed away from the static eliminator 9, such a configuration is adopted. Other than the contact input plate, it is embedded inside the temple. (2) in FIG. 13 is a cross-sectional view of the temple when cut along line l in (1). The touch input plate i2 is a part that touches the ear when wearing glasses. From here, the charge charged on the body can be drawn into the static eliminator 9. The conductive coil o2 (antenna) is a part that absorbs (neutralizes) and discharges static electricity after passing through the elements of the static eliminator. Even when static electricity is discharged from the antenna, the antenna is in the temple, and most of the electric energy is consumed by the static eliminator, so there is almost no influence on the outside.

It is sectional drawing of the charged substance for demonstrating the property of static electricity. It is sectional drawing of the discharge type surge absorber which enclosed special gas in the micro gap. It is a block diagram of the static electricity removal circuit using a surge absorber. It is a voltage rising curve when charging a capacitor. It is a time change curve of a voltage when charge and discharge of a surge absorber are repeated. It is a perspective view for demonstrating the structure and dimension of the static eliminating device of this invention. It is sectional drawing for demonstrating the structure and dimension of the static eliminating device of this invention. It is a voltage-time graph which shows the voltage change of a varistor. It is a voltage and time graph which shows the voltage change of the capacitor | condenser accompanying discharge. It is a circuit diagram of glasses with a static eliminator of the present invention. It is a perspective view for demonstrating the name and structure of metal glasses. It is sectional drawing of the modern part of metal frame glasses when this apparatus is modernly incorporated in the spectacles with static eliminating device of this invention. It is sectional drawing when this apparatus is integrated in the temple of plastic frame glasses in the spectacles with a static eliminating device of this invention.

Explanation of symbols

1 Surge absorber
(Special gas filled micro gap discharge type)
DESCRIPTION OF SYMBOLS 1a Surge absorber 1b of operating voltage 70b Surge absorber 1c of operating voltage 100V Surge absorber 101 of operating voltage 300V Glass case 102 Micro gas gap 103 with special gas 103 Electrode 2 Capacitor 4 Varistor 5 Discharge tube 8 Glasses 801 Lens 802 Rim 803 Pad 804 Bridge 805 Temple 806 Modern 810 Plastic Temple 811 Temple end (Temple rear)
812 Temple front 9 Static eliminator 901 Terminal connection pattern (input terminal i)
902 Terminal connection pattern (output terminal o)
i input terminal i1 input terminal lead wire i2 contact input plate o output terminal o1 output terminal lead wire o2 conductive coil (antenna)
R resistance (resistor)

Claims (2)

In the removal of static electricity charged on the human body, a built-in static elimination circuit consisting of elements that change static electricity into heat and light, such as surge absorbers, varistors, discharge tubes, etc. The input terminal is installed inside a modern pad, etc. so as to contact the human body, and the output terminal of the circuit is made of a metal core of the temple, a coiled metal, or a conductive fiber so as not to contact the human body. Glasses with static eliminator equipped with the feature. The glasses with the static eliminator according to claim 1, wherein the circuit is a circuit in which two or more elements having different operating voltages are arranged in parallel among surge absorbers, varistors, discharge tubes, capacitors, and the like. Item 1. Glasses with a static eliminator according to item 1.

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