JPS63258238A - Electrostatic voltage reducing method for automobile - Google Patents

Abstract

PURPOSE:To make small a current flow due to an electric charge on a driver's body and clothes and prevent an electric shock by making a door handle or key hole of a semi-conductor or a semi-poor conductor, or applying a coat thereto for obtaining large electric resistance. CONSTITUTION:The door handle or key hole 2 of an automobile is normally made of conductive materials. These materials are changed to semiconductor or semi-poor conductor type, or applied with a coat, thereby giving high resistance. In this case, an electric charge on the body of a driver 4 or his/her clothes causes a current flow when his/her bare hand 5 comes in contact with the door handle or key hole 2. The enlarged resistance of the door handle or key hole 2 can reduce the running current and prevent the occurrence of an electric shock.

Description

[Detailed Description of the Invention] The present invention relates to the prevention of electric shock when a passenger in an automatic east tower touches an exposed part such as a hand to a door handle or keyhole due to static electricity charged on the body when getting off or getting on the vehicle. be.

In recent years, synthetic SOt has come into widespread use, and many automobile seats, clothing, etc. are made of synthetic fibers, and as a result, during the dry winter season, the body and clothing are charged with static electricity.

For this reason, people often receive electric shocks when getting into a car, driving, or being hit by door handles, door keyholes, etc.

The causes and prevention methods of receiving electric shock due to static electricity will be explained using drawings.

FIG. 1 shows a car and a human body.

Figure 11. is the vehicle body, 2. is a door handle or keyhole, 3. 4. Body and clothing; 5. Tires; 4. Body and clothing; are exposed hands, etc.
6. Shoes with rubber soles, etc. Now, if your body and clothes are charged with static electricity, if you put your exposed hand on a door handle, you will receive an electric shock. This is because the static electricity charged on the body and clothes passes through the hand and door handle, and is charged to the capacitance of the body and tires.

[1] in FIG. 2 is the electrical equivalent circuit of a car, and [2] is the electrical ':'; 111 circuit of the human body.

In a typical automobile, the electrical resistance RO between the door handle or keyhole and the vehicle body is several ohms or less.

In addition, it is thought that an automobile has a fairly large capacitance C between the vehicle body and the ground, with a tie A7 and air as a dielectric.

When the air is dry, an electric charge is generated between the equivalent capacitance C1 of the body and clothes in step 4 due to the rubbing of clothes against the seats 1~ of a car or walking on synthetic carpets, plastic floors, etc. in shoes with rubber soles. Become electrically charged.

If the electrical resistance of the shoes is high, the electrical charge cannot escape,
A voltage V (V) is generated in the exposed hand 5, which is determined by the size of C1 and the amount of charge.

5. In this situation now. 2. If you touch the door handle or keyhole, 4. The charge accumulated on the door handle,
Through the keyhole 7. 1 through a small resistance RO. is charged to a capacitance C.

5, to 2. If the voltage at the time of contact is ■volts, then
A large current of V/RO flows instantly and you receive an electric shock. As a countermeasure to this problem, as shown in FIG. 2 [3], 2. By constructing or coating the door handle and key hole with a semiconductor or semi-conductor, the electrical resistance (RX) of the door handle and key hole can be increased (for example, from 100 ohms to 10 ohms).
1vl ohm), the flowing current, V/RX, will become smaller, and the discharge time from exposed hands will also become longer, making it impossible to receive electric shock.

[Brief explanation of the drawing]

Figure 1 shows a car and a human body. FIG. 2 [1] is an electrical equivalent circuit diagram of an automobile. Figure 2 [2] shows the electrical equivalent circuit of a human body, and Figure 2 [3] shows the electrical equivalent circuit of a car in which the door handle and keyhole are constructed or coated with semiconductors or other good conductors. Patent applicant wi leaf member drawing surface [11[2]

Claims (1)

[Claims] Automobile door handles (usually electrically conductive) or door keyholes (usually electrically conductive) are constructed or coated with semiconductors or semiconductive conductors to provide high electrical resistance (
1K ohm to 10M ohm), and discharges static electricity from a human body when it comes into contact with a door handle or a keyhole.