JPS586908B2 - meter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a meter used for measuring current, voltage, and various other measurements.

Conventional meters are known as moving coil type meters, in which a coil is installed around a magnet, and a pivot shaft is installed on the coil so that the coil can rotate freely around the magnet, and a pivot bearing made of a precious stone such as sapphire is used. It was loosely fitted.

The pointer was attached to a coil, and when a measurement current was passed through the coil, the coil moved, and the pointer moved to give instructions.

This conventional meter had a complex structure with many parts such as coils, pivots, pivot bearings, and pointers.

Therefore, assembly work was not easy and the cost was high.

Furthermore, automation was also difficult.

Therefore, an object of the present invention is to provide a meter that has a simple structure, does not require conventional coils, pivots, pivot bearings, etc., is inexpensive to manufacture, has good response, and requires little power to move the meter. be.

The embodiments of the present invention shown in the drawings will be described below.

FIG. 1 shows a front view of the present invention.

A narrow slit window 2 is provided horizontally on the front panel of the meter 1, and a scale 3 is provided around the slit window 2.

A part of the element 4 can be seen through the slit window 2.

Elements 4 include piezoelectric transducer elements that generate strain and change mechanically when electricity is applied, and magnetostrictive elements that generate strain and change mechanically due to magnetism. The side, that is, the maximum movable side 4a is the slit window 2.
Provide a smaller air gap inside the meter.

The mounting method is slightly different from the direction of the slit window 2 in which the maximum movable side 4a is horizontally provided, so that a part of the element 4 can be seen through the slit window 2 as shown in Figure 1, and other parts cannot be seen through the slit window 2. The angle of the element 4 is changed as shown in FIG.

When the insulator 6 applies a voltage or magnetic field to the element etc.,
This is not necessary if the meter body is made of an insulating material to prevent current flow.

The elements 4 are wired as shown in FIG. 2 so that a voltage can be applied or a magnetic field can be created.

When a voltage or a magnetic field is applied to the element 4, mechanical fluctuation occurs as shown by the imaginary line in FIG. 3, and the element 4 moves upward in the meter 1.

Then, the edge of the maximum movable side 4a of the element etc. 4 gradually appears in the slit window 2, and when the change in the maximum movable side is maximum, it appears at the end of the slit window 2 in the maximum display direction.

Therefore, even if the mechanical change in the elements 4 is small, the slit window 2
The edges of the maximum movable side 4a appear sequentially from the end in the minimum display direction to the end in the maximum display direction.

In other words, there is a moiré effect that magnifies even the slightest displacement, and this effect was used in meters.

In addition, since the slit window 2 is thin and the edge of the maximum movable side that appears on the slit window may be difficult to see, an optical magnifying device, such as a semicylindrical lens 5, is installed in front of the slit window 2, as shown in Fig. 3. By installing it, it becomes easier to see.

There is also an embodiment in which the movable side 4a is colored, or a small piece of colored object is installed, and the colored piece is viewed through a slit window to make it easier to see.

Fig. 4 shows a state in which the direction of distortion in the display section is reversed by changing the polarity of the voltage applied to the elements inside the case, and the maximum movable side 4a is distorted downward from above the slit window. This is an example showing the following.

As described above, the present invention is a meter structure that amplifies and displays mechanical fluctuations of a piezoelectric element or a magnetostrictive element using the moiré effect, so the structure is simple and there are fewer failures.

Also, unlike conventional meters, coils, pivots, pivot bearings, etc. are not required, resulting in lower costs.

Furthermore, since it uses a new operating principle, it has the advantage of good response and low power to move the meter.

[Brief explanation of drawings]

FIG. 1 is a front view of the present invention, FIG. 2 is a sectional view taken along line XX in FIG. 1, FIG. 3 is a longitudinal sectional view of the present invention, and FIG. 4 is a front view of an embodiment of the display section. 1...meter, 2...slit window,
3. Mori Maguyama, 4... Motoko, etc., 4a...
Maximum movable side, 5... Lens, 6... Insulator.

Claims (1)

[Claims] 1. Fix the end of a piezoelectric transducer element that generates distortion due to electricity and undergoes mechanical fluctuations or a magnetostrictive element that generates distortion due to magnetism and undergoes mechanical fluctuations to the back of the main body of the meter. The other end of the (to be described) is the maximum movable side, and a narrow slit window is provided horizontally on the front panel of the meter so that the movable side can be seen through, facing the maximum movable side. When the fluctuation is zero, the end of the movable side can be seen through the end of the slit window, and when the mechanical fluctuation of the element etc. is at its lowest, the vicinity of the other end of the movable side is the other end of the slit window. The meter is characterized in that the slit window and the movable side are installed at different angles so that they can be viewed from nearby, and the green of the movable side is directly indicated to the slit window in accordance with the voltage or magnetic field level of the object to be measured.