JP2559696Y2 - High voltage switching relay - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relay for switching a high voltage for a small current and discharging a residual charge of a device.

[0002]

2. Description of the Related Art When inspecting a cathode ray tube or the like, it is necessary to switch the voltage because the applied voltage varies depending on the size and type of the cathode ray tube. In this application, the magnitude of the voltage is several KV to 50 KV, and the current is several μA to 10 m.
It is about A.

A high-voltage switching relay is used for switching the voltage. The conventional high-voltage switching relay has a structure in which a movable core enters and exits a cylindrical coil. The movable contact comes and goes with respect to the fixed contact fixed to the glass enclosure. Normally, SF ₆ gas is sealed in the glass sealed container to enhance arc extinguishing performance.

[0004]

However, in this conventional structure, it is necessary to increase the distance between the fixed contact and the movable contact in order to secure the insulation distance between the contacts at a certain value or more. However, there was a problem that the size became large.

In addition, even if the insulation between the contacts is good in the initial stage, the contact material adheres to the container wall during use and the leakage current increases, and the leakage current is that of a cathode ray tube. It cannot be distinguished whether the switching relay or the switching relay is used, and there is a problem that the measurement result is adversely affected.

The problem to be solved by the present invention is to provide a switching relay which is small and capable of switching at a high voltage, and which minimizes leakage current and does not increase even in continuous use.

[0007]

In order to solve this problem, a high-voltage switching relay according to the present invention comprises a rotor rotatable around an axis in an enclosure, and a position opposed to an outer periphery of the rotor. A pair of permanent magnets having different polarities, a pair of fixed cores provided at positions opposite to each other on a circumference close to the outer peripheral surface of the rotor in the enclosure, and a pair of fixed cores wound around the fixed core. A rotating contact coil, a movable contact provided coaxially with the rotor, and a fixed contact disposed so as to come into contact with and separate from the movable contact in the enclosure. In a state where the contact is in contact with the fixed contact, the magnetic core of the permanent magnet of the rotor is located at a position having a delayed deflection angle with respect to the pole of the fixed iron core.

[0008]

When a drive voltage is applied to one of the drive coils, the stationary core is excited to have the same polarity as the permanent magnet approaching in the current state, and the repulsive force causes the rotor to rotate on the opposite side. To the position. At that position, the movable contact contacts the other fixed contact. Although the application of the voltage to the drive coil is turned off at that time, the contact pressure between the movable contact and the fixed contact is reduced due to the attraction between the permanent magnet of the rotor and the fixed iron core. It is continuously provided by the suction force.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be specifically described based on embodiments shown in the drawings.

FIG. 1 is a sectional view of a high-voltage switching relay according to the present invention, and FIGS.
-A line, BB line, CC line and DD line sectional view and an arrow view, FIG. 6 is a perspective view of the rotor.

In these figures, reference numeral 1 denotes an enclosure made of a heat-resistant insulating material such as polycarbonate.
a, a bottom container 1b, and a lid 1c. A rotor 2 is rotatably housed in a ball bearing 3 inside the inner container 1a, and permanent magnets 4 and 5 are fixed to opposing positions on the outer periphery of the rotor 2 as shown in FIG. Further, fixed iron cores 6 and 7 and driving coils 8 and 9 for exciting them are provided in a position close to the rotor 2 in the bottom container 1b.
Are arranged at opposing positions.

The rotor 2 also includes a movable contact arm 10.
The movable contact 11 is attached to the tip of the movable contact arm 10 as shown in FIG.

On the other hand, as shown in FIG. 4, the enclosure 1 has a common terminal 12 electrically connected to the movable contact 11 via a flexible conductive wire 15, a fixed contact 13 contacting the movable contact 11, 14 is fixed. Common terminal 12
Each of the fixed contacts 13 and 14 is led to the outside via a lead wire. Movable contact 11, fixed contact 13,
Reference numeral 14 denotes a contact material such as CuW, and an arc-extinguishing gas such as SF ₆ gas is sealed in the sealing container 1 through a gas sealing port and sealed with a cap 17. Alumina particles for adsorbing decomposed gas are stored in a case 16 provided with many small holes.

As shown in FIG. 4, the rotation angle α of the movable contact 11 is within 180 °, and the rotor 2 rotates within the range of α. At this time, the mounting positions of the permanent magnets 4 and 5 are set to stop at positions deviated by θ from the poles of the fixed iron cores 6 and 7, as shown in FIG.

In the high voltage switching relay having the above configuration,
When a current having the same polarity as that of the permanent magnet 4 is applied to one drive coil, for example, the drive coil 8 from the position shown in FIG.
The iron core 6 and the permanent magnet 4 repel, and the other permanent magnet 5 and the iron core 6 attract each other. As a result, the rotor 2 rotates by an angle of α as shown by the one-dot chain line in FIG. 4 and stops when the movable contact 11 comes into contact with the other fixed contact 14. Thereafter, the power supply to the drive coil 8 is stopped. In practice, a drive pulse having an ON time that is two to three times the time required for switching the angle of the rotor 2 is given.

In the state where the power supply to the drive coil 8 is stopped, the permanent magnets 4 and 5 are deviated by an angle of θ with respect to the fixed iron cores 6 and 7, so that the rotor 2 has a magnetic field corresponding to the angle of θ. A suction force acts, and the suction force acts as a contact pressure for pressing the movable contact 11 against the fixed contact 14. Therefore, no urging means such as a spring is required.

To switch the movable contact 11 to the original position, the drive coil 9 is energized this time. As a result, the permanent magnet 4 is repelled as described above, the permanent spherical magnet 5 is attracted to the iron core 7, and the rotor returns to the position shown in FIG.

[0018]

[Effects of the Invention] As described above, the present invention has the following effects.

Since the distance between the contacts can be increased, small-sized and high-voltage switching can be performed.

Since the contact holding force can be obtained by the attractive force of the permanent magnet, there is no need to constantly supply a current,
Power saving can be achieved.

Since the distance between the contacts is large, the leakage current is small over a long period of time.

[Brief description of the drawings]

FIG. 1 is a sectional view of a high-voltage switching relay according to the present invention.

FIG. 2 is a cross-sectional view taken along line AA of FIG.

FIG. 3 is a cross-sectional view taken along line BB of FIG.

FIG. 4 is a sectional view taken along line CC of FIG. 1;

FIG. 5 is an arrow view taken along line DD in FIG. 1;

FIG. 6 is a perspective view of a rotor.

[Explanation of symbols]

1 enclosure, 1a inner container, 1b bottom container, 1c
Lid, 2 rotors, 3 ball bearings, 4,5 permanent magnets,
6,7 iron core, 8,9 drive coil, 10 movable contact arm, 11 movable contact, 12 common terminal, 13,1
4 fixed contact, 15 flexible conductor, 16 case, 17 gas inlet cap

Claims (1)

(57) [Scope of request for utility model registration] 1. A rotor rotatable around an axis in an enclosure, a pair of permanent magnets having opposite polarities provided at opposing positions on an outer periphery of the rotor, and A pair of fixed cores provided at opposed positions on a circumference close to the outer peripheral surface of the rotor, a drive coil wound around the fixed core, and a movable contact provided coaxially with the rotor And a fixed contact disposed so as to come into contact with and separate from the movable contact in the enclosure. When the movable contact is in contact with the fixed contact, the magnetic core of the permanent magnet of the rotor is A high-voltage switching relay, wherein the relay is set to a position having a delayed deviation angle with respect to a pole of the fixed iron core.