JPH0452689Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a static electricity detector having a liquid crystal display section that displays a stepwise display. This invention relates to a static electricity detector that responds to the amount of static electricity charged in the electrostatic field.

[Problems to be solved by conventional techniques and ideas]

Conventionally, there are many voltage detectors on the market that use neon discharge tubes in their display parts, but neon discharge tubes have extremely poor reactivity to low voltages and cannot be applied to voltages of several tens of volts or more. Otherwise, there would be no discharge, so it was impossible to detect low voltages below that, and it was impossible to detect static electricity.

The present invention overcomes the drawbacks of these conventional techniques and is of a type that is used by contacting the subject, and by that contact, it responds sensitively to extremely low voltage and low current electricity, and can detect static electricity. It is an object of the present invention to provide a static electricity detector that can also confirm the magnitude of the static electricity charge.

[Means to solve the problem]

That is, the present invention comprises a subject contact terminal made of conductive rubber or conductive plastic, and a series high resistance whose one end is connected to the contact terminal and the other end is connected to one terminal of the liquid crystal split display section described below where the display is initially displayed. A liquid crystal display section composed of a plurality of divided liquid crystal display sections made of field-effect liquid crystal, and a dividing resistor for controlling the distribution of the electric charge applied to the contact terminal in stages and applying it to each of the divided liquid crystal display sections. and a ground electrode for contact with the human body, and the whole is formed into a finger peg shape, the above-mentioned subject contact terminal is provided at the tip, the above-mentioned liquid crystal display section is integrally provided on the outside, and the above-mentioned ground electrode is provided on the inside. Static electricity that responds to the amount of static electricity charged on the subject, characterized in that it is used by fitting the finger into the ground electrode and touching a part of the finger with the contact terminal at the tip of the subject. The main topic is electrical voltage detectors.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a circuit of an embodiment of the present invention.
1 is a test object contact terminal, 2 is a high impedance element, and 3 is a liquid crystal split display section 12, 13, 14, 15.
8, 9, 10, 11 are dividing resistors, and 4 is a ground electrode for human body contact.

The present invention uses a high resistor 5 with a large resistance value as the high impedance element 2, and as shown in the figure, one end of the high resistor 5 is connected to the test object contact terminal 1, and the other end is connected to the liquid crystal split display section 12 where the display is initially performed. It is a series high resistance connected to one terminal of. The resistance value of the high resistance 5 is several hundred KΩ to several tens of MΩ, preferably 1 to several tens of MΩ.
It is 10MΩ. The liquid crystal display section 3 is a field effect liquid crystal 6
is sandwiched between conductive electrodes 7 and 7'. The dividing resistors are arranged as shown in the figure in order to divide and control the charge applied to the contact terminal 1 in stages and apply it to each liquid crystal divided display section.

Here, we will explain the second basic operating principle of this invention.
This will be explained with reference to the figures. Figure 2 is a basic conceptual circuit diagram for explaining the basic operating principle of the present invention. When the subject contact terminal 1 is brought into contact with a subject and a charge is applied to the terminal 1, a very small current flows through the human body via the high resistance 5, the liquid crystal display section 3, and the ground electrode 4.
At this time, an arbitrary display such as a picture, a mark, a number, a letter, etc. is displayed on the liquid crystal display section 3, so that it can be confirmed that the subject is at a high potential. That is, in the present invention, the liquid crystal display section 3 uses a field-effect liquid crystal 6 that operates with a voltage of 2 to 3 V and requires very little current, and also has the function of accumulating electric charge. The electric charge charged between the electrodes 7 and 7' of the liquid crystal 6 causes the electro-optical effect to persist to some extent, thereby making it possible to detect static electricity.

In addition, in the present invention, as shown in the same figure, the liquid crystal display section 3
Capacitors 16 can be provided in parallel. With this configuration, although the charge effect liquid crystal 6 itself has a charge storage function, the capacitor 16 provided in parallel with the liquid crystal display section 3 also has a charge storage function, which further extends the duration of the electro-optic effect. This has the effect of increasing the afterimage property of the liquid crystal display section 3. In addition, current and voltage surge absorption effects,
In other words, it has the effect of absorbing a sudden increase in current or voltage, which has the advantage of increasing safety.

Next, the operation of the voltage detector of the present invention will be explained.
That is, the liquid crystal display section 3 is divided into parts, and the electric charge applied to the contact terminal 1 is transferred to the divided resistors 8, 9, 1.
Since the distribution is controlled in stages by 0 and 11 and applied to each liquid crystal divided display section 12, 13, 14, and 15 as appropriate, the static electricity charge (amount of electricity) applied at the object contact terminal 1 is Depending on the size, each liquid crystal divided display section 12, 13, 14, 15 operates in stages. In other words, each liquid crystal divided display section 12, 13, 14,
The charge of 15 is maximum in the liquid crystal split display section 12,
Below, the liquid crystal split display section 13, the liquid crystal split display section 14,
Since the liquid crystal divided display section 15 becomes smaller in size, the liquid crystal divided display section 15 is activated in order, depending on the magnitude of the amount of static electricity applied to the subject contact terminal 1. At this time, each liquid crystal divided display section operates according to the above-mentioned basic operating principle and displays a display.

In this way, according to the voltage detector of the present invention, the display changes depending on the amount of electricity charged on the subject (for example, the larger the amount of electricity, the more the number of divided display sections will be displayed), and the detection It is possible to roughly measure the amount of static electricity generated.

FIG. 3 shows an actual embodiment of the voltage detector of the present invention using the circuit shown in FIG. This is a ground electrode (note that the dividing resistor is not shown because it is built-in). As the material for the contact terminal 1, conductive rubber or conductive plastic is used because it does not easily damage the surface of the subject during contact. Furthermore, the electrostatic detector of this invention is the third
As shown in the figure, the overall shape is formed into a finger peg type, and a test object contact terminal 1 is provided at the tip of the finger peg.
A liquid crystal display section 3 is provided on the outside of the finger rest integrally with the finger rest, and a ground electrode 4 is provided on the inside of the finger rest, so that when the finger rest is fitted into the finger and used, the earth electrode 4 comes into contact with a part of the finger. The test object contact terminal 1 is formed so as to be located at the outer tip of the finger rest.

When actually using the voltage detector shown in FIG. If there is static electricity on the human body, a number of heart marks, for example, will be displayed on the LCD display 3 according to the amount of static electricity, indicating the presence of static electricity. You can check the magnitude of the amount of electricity. This embodiment not only functions as a voltage detector, but also includes toy-like elements, and has a variety of purposes.

[Effect of idea]

As explained above, the electrostatic voltage detector of the present invention has a finger-sock shape as a whole, a test object contact terminal is provided at the tip, and a liquid crystal display is integrally provided on the outside.
A ground electrode is installed on the inside, and voltage detection is performed by fitting the voltage detector onto a finger and touching the contact terminal to the subject with the earth electrode touching a part of the finger, so the voltage detector can be used with just one finger. It is extremely easy to use because static electricity can be detected using the . Furthermore,
Since the voltage detector of the present invention uses a field-effect liquid crystal for the display part and has the above-mentioned configuration, it operates with a small amount of voltage and current (more specifically, with an amount of electricity), and the contact terminal is covered. It is possible to detect static electricity charged on a specimen simply by contacting it with the specimen.Moreover, as mentioned above, the display is configured so that the multiple liquid crystal display sections are displayed in stages, so that the display is not displayed. By looking at the number of divided display sections, it is possible to roughly measure and confirm the magnitude of the amount of static electricity detected.

In addition, according to the present invention, since it is equipped with a series high resistance connected to a contact terminal at one end and a split liquid crystal display where the other end is initially displayed, static electricity is charged and the amount of electricity is unknown. Despite being a type of voltage detector that is used in contact with a subject under test, each display section operates well without any problems, and when the contact terminal is brought into contact with the subject, the contact terminal → high resistance → Since an electric circuit is constructed from divided resistors to earth electrodes (to human body to earth), it has the advantage of being able to eliminate static electricity present in the subject.

[Brief explanation of the drawing]

FIG. 1 is an electrical circuit diagram showing an embodiment of the present invention;
FIG. 2 is a basic conceptual circuit diagram for explaining the basic operating principle of the present invention, and FIG. 3 is a perspective view showing an actual embodiment of the present invention. 1... Test object contact terminal, 2... High resistance, 3...
Liquid crystal display section, 4... Earth electrode for human body contact, 6
...Field-effect liquid crystal, 8, 9, 10, 11... Divided resistor, 12, 13, 14, 15... Liquid crystal divided display section.

Claims (1)

[Scope of utility model registration request] A test object contact terminal made of conductive rubber or conductive plastic, a series high resistance connected to the contact terminal at one end and one terminal of the liquid crystal split display section described later on which the display is initially displayed, and a field effect liquid crystal. a liquid crystal display section composed of a plurality of liquid crystal division display sections, a division resistor for controlling the distribution of the charge applied to the contact terminal in stages and applying it to each liquid crystal division display section, and a human body contact The device is formed into a finger-sock shape as a whole, with the object contact terminal provided at the tip, the liquid crystal display section integrally provided on the outside, and the earth electrode provided on the inside, which is fitted onto the finger. An electrostatic voltage detector that responds to the amount of static electricity charged on a subject, characterized in that it is used by touching a contact terminal at the tip to a subject while touching a part of a finger with a ground electrode.