JPS588100B2 - Keidenki - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a relay having an electromagnet operated by alternating current in a closed-circuit sealed pot member that provides magnetic shielding to the outside, and an air gear acting between the stator of the electromagnet and the armature. and a non-active air gap, and at least a portion of the armature is surrounded by a magnetic coil.

The changeover switch device is used to switch the display of the power consumption charge when the power charge is applied at different rates depending on the time of day or the purpose of use.

The measurement of power consumption for this purpose is performed by a type 2 rate counting mechanism.

In this mechanism, rate switching is performed by disconnecting and disconnecting the connection between the power measurement system and the counting mechanism provided in the rate meter.

The changeover switch is also used for switching and relays to display power consumption at maximum power consumption.

It is known to use thermal control devices in relays to operate transfer switch mechanisms.

These thermal control devices generally include a control bimetallic member that is adapted to expand when heated by a heating element, thereby performing mechanical work to actuate the transfer switch device.

However, a disadvantage of thermally actuated devices is that additional devices must be provided to compensate for the effects of ambient temperature fluctuations on the bimetallic component.

Another disadvantage is that the time difference between the application of a transfer switch command and its execution is often quite large.

These drawbacks can be overcome by using electromagnetic relays.

For this purpose, alternating current systems are known, but in such systems the vibrations of the armature cause rapid wear on the plain bearings of the armature and, moreover, these plain bearings require continuous lubrication. , Therefore, it is not a maintenance-free type.

In addition to this, such systems are noisy to operate.

In order to overcome these drawbacks, it is already known to design the changeover switch device in the form of a DC pivoting armature electromagnet.

However, these types require additional rectifiers as well as shock-resistant series resistors, thus increasing cost.

A relay having a transfer switch arrangement operated by an electromagnet, with a magnetic core thereof and a first pole piece covering one end face of the magnetic coil, and a second pole piece in the magnetic flux of the magnetic core at an opposite end of the magnetic coil. Those which are rotatably arranged relative to the pole pieces of are already known.

In this type of relay, the pole piece that is fixedly coupled to the magnet has one or more pairs of side surfaces that are parallel to each other, while the rotatable pole piece has parallel surfaces that are combined with said side surfaces. It has one formed by circularly bending a strip-shaped rotatable pole piece to form a cage surrounding the magnetic coil and the first pole piece.

Since the two pole pieces touch each other in the energized state of the electromagnet, the rotating magnet is fixed.

Furthermore, a magnetic shunt occurs, for example between two pole pieces, which reduces the efficiency of the relay.

Rotating armature relays of the type described above are also already known.

In this relay, a working air gap is formed between the stator and the rotating armature, and a non-working air gap extends conically within the spool core with a constant width.

The rotating armature is thus only partially located in the area of the spool core.

This type of relay is complex and expensive to manufacture.

Therefore, the present invention provides a relay having an electromagnet operated by alternating current, which is simple, inexpensive, small, low noise, has low magnetic leakage, has a reliable structure, and is not affected by its position. The purpose of the present invention is to provide a device that operates smoothly, consumes little power, and causes little wear on the bearings.

The purpose of this is to provide a relay of the type described above with an armature of substantially rectangular cross-section, which is housed entirely within the hollow cavity of the magnetic coil and which extends at right angles to the longitudinal force axis of the magnetic coil. pivots about an axis that is
This is achieved by defining a non-active air gap located at one pole of the magnet and an active air gap located at the other pole of the magnet.

A preferred embodiment of the relay according to the invention is characterized in that it has a restoring spring for the armature, the reaction moment of which decreases with increasing actuation movement of the armature.

The invention will be explained in more detail below with reference to an embodiment illustrated in the accompanying drawings.

The relay shown in FIGS. 1 and 2 is enclosed in a casing 1 made of ferromagnetic material.

The casing 1 surrounds a magnetic coil 2 which has a hollow cavity 3 in the center.

One pole side of the magnetic coil 2 is closed by a plug-shaped inserter 4 made of ferromagnetic material.

The inserter 4 is inserted into the opening 5 of the casing 1.

In order to prevent magnetic leakage, the opening 5 is covered by a rim member 6 made of ferromagnetic material.

On the opposite side of the magnetic coil 2, a ferromagnetic U-shaped member 7
is inserted into the hollow space 3 and covered on the outside by a rim member 6 made of ferromagnetic material.

The end of the U-shaped member 7 extends immediately adjacent to the end of the inserter 4.

Two spindles 8 are inserted into suitable holes formed in the two legs of the U-shaped member 7, respectively, along the length of the hollow cavity 3 and in its center.

By bearings 9, preferably made of a low-friction plastic material, the two spindles 8 carry a pivotable armature 10 near its center of gravity.

The armature 10 has a slot 11, and the slot ¥1
A spring 12 is disposed at 1.

A return spring 12 is connected to one end of the armature 10 and to a carrier bracket 13.

The mating bracket 13 is attached to the U-shaped member 7 by screws 15.
It is held by a block-shaped bottom member 14.

The armature 10 has a truncated diamond shape and carries laterally at its end near the inserter 4 a rigid wire 16 of non-ferromagnetic material.

The wire 16 projects through the slot 17 of the inserter 4 and can transmit the movement of the armature 10 to the outside of the relay.

A non-active air gap 18 is defined between the U-shaped member 7 of one pole and the wide sides of the armature 10, and an active air gap 19 is defined between the U-shaped member 7 of one pole and the wide sides of the armature 10.
0 and a rounded pole piece 21 of the other inserter 4 .

The working air gap 19 is located at right angles to the non-working air gap 18.

Between the U-shaped member 7 and the inserter 4 a relatively large air gap is defined, the magnetic field effect of which between the two poles of the magnetic coil 2 can be substantially ignored.

In operation, the inactive air gap 18 remains virtually unchanged, while the active air gap 19 remains in the armature 10.
The size changes between the limit positions.

The stress of the return spring 12 can be very finely controlled by means of the adjusting screw 22.

That is, the adjustment screw 22 adjusts the extent to which the support bracket 13 enters the slot 11 of the armature 10.

The magnetic actuation stress is further induced by a ferromagnetic screw 2 placed between the U-shaped member 7 and the inserter 4, i.e. between the two poles of the magnet.
It can also be fine-tuned by a variable magnetic shunt according to No. 3.

Next, the mode of operation will be explained in detail.

In FIG. 1, the relay of the invention is illustrated in its rest position.

The angle between the axis of the return spring 12 and the longitudinal axis of the armature 10 in this rest position is determined by the adjusting screw 22.
It can be adjusted by

This angle assumes a relatively large value in the rest position.

When the armature 10 is in this rest position, the working air gap 19 between the rounded end 20 of the armature 10 and the rounded pole piece 21 is also large.

This rest position of the armature 10 can be limited by an abutment member (not shown).

When the magnetic coil 2 is energized, the magnetic force is applied to the armature 1
0, thereby causing the armature 10 to tilt.

For this purpose, the rounded end 20 and the rounded pole piece 21 of the armature 10 are designed so that the working air gap 19 defined by them is in the working position of the armature 10, as shown in FIG. It is shaped so that it gradually contracts in the direction.

The point of closest approach of the working air gap 19 and the position of the return spring 12 determined by the adjustment screw 22 are such that the return spring 12 moves close to the pivot point of the armature 10 only to move beyond the pivot point. It is relatively structured so that there is no such thing.

This can also be easily achieved by extending the spindle 8 through the armature 10 and mechanically preventing the return spring 12 from reaching its pivot point.

In addition to this, the return spring 12
It can be adjusted by the displacement of the bottom member 14 when the screw 15 is loosened so that the reaction moment of the return spring 12 decreases with increasing zero attraction value.

For example, a spring reaction moment of 10 cmg in the rest position of the armature 10 can be adjusted to 2 cmg in the actuated state.

This shows that the armature 10 according to the invention, in contrast to known relays with pivoting armatures having a similar shape, in which the spring reaction moment increases quadratically when the relay is actuated. means pivoting with sudden movement.

In the limit position of the energized armature, a small working air gap is always defined between the rounded end 20 of the armature 10 and the rounded pole piece 21.

Therefore, the armature 10 can be prevented from being stuck in the limit position due to residual magnetism.

The movement of the armature 10 is transmitted to the outside of the relay by means of a rigid wire 16 and may, for example, effect switching of the contacts of a toll counter.

The advantages of the present invention are as follows.

The relay described above is simple and inexpensive to manufacture, can be made using currently available semi-finished products, and does not require the expensive machining required for previously known relays.

Highly reliable operation can be achieved with easy and precise adjustability.

Since the pivoting armature of the present invention is located essentially completely within the hollow cavity of the magnetic coil, magnetic leakage is kept to a minimum.

The relay of the present invention has almost no effect on the outside through the gap in the magnetic shielding around the electromagnet,
Perhaps it's only a fraction of a percent.

The power consumption of the electromagnet can be kept low due to the shape of the pivoting armature.

Since the spring reaction moment acting in a direction opposite to the magnetic action moment is smaller in the working position of the armature than in the rest position, the pivoting movement of the armature caused by the alternating magnetic flux is kept small.

Armature noise is therefore significantly reduced due to the small moments near the mounting axis.

Unlike known devices, the spindle of the armature of the invention is
When an electromagnetic force is applied, it experiences a force in the same direction as the magnetic attraction.

As a result, the bearings are not subjected to alternating loads in different directions, so that bearing noise can be reduced and bearing wear can be reduced.

Because the armature is pivoted near its center of gravity, the relay can be mounted horizontally, vertically, or tilted without adversely affecting its operation.

[Brief explanation of drawings]

1 is a side view of the relay according to the present invention in a rest state, FIG. 2 is a top view of the relay of FIG. 1 shown in cross section taken along line L-L in FIG. 1 is a side view of the relay of FIG. 1 with the electromagnet energized; FIG. In these drawings, 1 is a casing, 2 is a magnetic coil, 3 is a cavity, 4 is an inserter, 5 is an opening, 8 is a spindle,
9 is a bearing, 10 is an armature, 12 is a return spring, 7
is a U-shaped member, 18 is a non-active air gap, 19 is a working air gap, and 23 is a screw.

Claims (1)

[Claims] 1. A magnetically sealed magnetic shielding member, an AC-driven magnetic coil housed within the magnetic shielding member and having a hollow chamber,
an armature that is completely housed within the hollow chamber, is tiltable about an axis perpendicular to the axis of the magnetic coil, and has a substantially rectangular cross section; A non-acting air gap 18 is formed between the member 7 and an active air gap 19 is formed between the round face of the armature and the round face of the other fixed pole part, and these two The round surfaces are formed so as to approach each other as the armature pivots in the direction in which the armature tilts when the magnetic coil is energized, but the armature 10 has a slot for accommodating the return spring 12. 11, and the return spring 12 is held so as not to exceed the tilting axis of the armature 10 even in the end position of the armature 10 when the magnetic coil is energized, thereby locking the armature in the end position. A relay characterized in that it is provided with holding devices 13, 15, and 22 that hold the return spring 12 so as to prevent it from being locked and to accurately position the return spring 12.