JPS5917071Y2 - relay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a relay having an electromagnet, a pair of permanent magnets, and an armature.

Electric relays are widely used in place of electronic switches because of their reliable switching characteristics and large current capacity.

Such electrical relays have an electromagnet and an armature, the electromagnet driving the armature to control a movable contact of a switch or an electric shutter of a camera, etc.

That is, the relay has at least an electromagnet and an armature, and the position of the armature is controlled by the electromagnet.

One of the conventional relays consists of two electromagnets and one armature, and since power is always applied to one of the electromagnets to move and lock the armature, a large amount of power is required.

Other conventional relays consist of an electromagnet, an armature, and an elastic member attached to the armature, but power must be applied to the electromagnet while the armature is locked, requiring a large amount of power.

Other conventional relays, consisting of an electromagnet, an armature, and a mechanical latch to remove the locking power, are complex in construction.

Still other conventional relays consist of an electromagnet, an armature, and a permanent magnet for locking the armature, but because the armature rotates, the relay has a large diameter.

Therefore, one object of the present invention is to provide a compact relay that does not require locking power.

Another object of the present invention is to provide a relay in which the armature performs a sliding movement.

The invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view of a preferred embodiment of the present invention, and FIG. 2 is an assembled sectional view of FIG. 1.

The core 2 as a magnetic member is inserted into the opening of the coil 4, the left end of the coil 4 contacts the first permanent magnet 6 sandwiched between the first and second pole pieces 8 and 10, and the right end contacts the first permanent magnet 6 held between the first and second pole pieces 8 and 10. It contacts the second permanent magnet 12 which is sandwiched between the third and fourth pole pieces 14 and 16.

As shown in FIG. 2, one end of the pole piece projects from one end of the permanent magnet.

It should be noted that the magnetic poles of the permanent magnets 6 and 12, for example the north poles, face each other.

The conductor 18 of the coil 4 is connected to a terminal 20 provided on the top cover 22.
connected to.

The top and bottom covers 22 and 24 have a guide member 26 (the guide member in the top cover is not shown) and a window 28, and a yoke 32 and an armature 30 engaged with such yoke 32 in a concave-convex engagement are provided with a guide member 26 (the guide member in the top cover is not shown) and a window 28. The yoke 32 is provided so as to be able to slide on the yoke 32, and both ends of the yoke 32 protrude to the outside through the window 28.

Both ends of the U-shaped armature 30 are provided between respective pole pieces as shown in FIG.

Therefore, during the locking period, the armature 30 is
Contact with 0 and 16.

Electromagnetic means consisting of a core 2 and a coil 4 and a permanent magnet 6
, 12 and magnetic pole pieces 8, 10, 14, 16, and the armature 30 are covered with top and bottom covers 22 and 24.

The movable contacts of the switch or the shutter mechanism of the camera are controlled by a yoke 32.

The operation of the present invention will be explained with reference to FIG.

In the first state, it is assumed that the armature 30 is in the position shown in FIG. 2 and that no power is supplied to the coil 4.

As shown by the solid arrow, the magnetic flux from the first permanent magnet 6 passes through the second pole piece 10, the core 2, the third pole piece 14, the armature 30, and the first pole piece 8, so the armature 30 is at that position. is locked.

When the coil 4 is biased to the opposite polarity to the first permanent magnet 6,
A magnetic flux indicated by a dashed arrow is generated, the locking force of the first permanent magnet 6 is weakened or neutralized, and the magnetic field of the second permanent magnet 12 or the sum of this magnetic field and the magnetic field of the electromagnet causes the armature 30 to moves to the right and changes its state.

It should be noted that the only power required to change the state of the armature is sufficient to weaken or neutralize the locking force.

After the armature 30 moves to the right and enters the second state, no power is supplied to the coil 4, and the magnetic flux from the second permanent magnet 12 is transferred to the third pole piece 14, the core 2, and the second pole piece. 10, armature 3
0 and the fourth pole piece 16 to lock the armature 30 in the second state.

When the coil 4 is reenergized to the opposite polarity to the second permanent magnet 12, the armature 30 moves to the left and returns to the first state.

As can be understood from the above explanation, in the relay according to the present invention, two sets of permanent magnet means and magnetic members are arranged in a straight line, and a U-shaped armature is arranged parallel to this. performs a sliding motion.

Therefore, the moving distance (displacement) of the end of the armature can be directly transmitted to the actuator of the switch (yoke 32 in the embodiment).

Since the displacement of the armature is independent of the length of the armature, the length of the armature can be short, and a compact relay can be realized.

This leads to a reduction in the length of the magnetic circuit, thereby reducing the reluctance of the magnetic circuit and increasing the locking force of the armature.

Since the U-shaped armature ends move in parallel between the pole pieces, there is good surface contact between the armature ends and the pole pieces, which also increases the locking force.

In addition, the U-shaped armature end portion only moves in parallel between the pole pieces, and there is no need to take into account gaps in vertical movement, and this also contributes to downsizing of the relay.

Furthermore, since each permanent magnet means is constructed by sandwiching a permanent magnet between two pole pieces, it is possible to replace individual parts to adjust the length, spacing, etc. of each part, improving flexibility in design. Effects such as this can be obtained.

Although the above description is only about one preferred embodiment of the present invention, it will be obvious to those skilled in the art that various changes and modifications can be made without departing from the gist of the present invention.

For example, although in the embodiment the north poles of the permanent magnets 6 and 12 face each other, the south poles of the magnets may also face each other.

The power applied to terminal 20 may be controlled by pulses from a monostable multivibrator whose period is longer than the travel time of the armature.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a preferred embodiment of the present invention, and FIG. 2 is an assembled sectional view of FIG. 10 and 1
4.16 indicates a pole piece, and 30 indicates an armature.

Claims (1)

[Scope of utility model registration request] Two sets of permanent magnet means are provided, each of which includes a permanent magnet held between two pole pieces, one end of each of the two pole pieces protruding from the permanent magnet to form a gap between the two pole pieces, Permanent magnet means are arranged at both ends of the magnetic member with the same polarity facing each other, and both ends are arranged in each of the gaps of the two sets of permanent magnet means, and the two ends have different polarities of the two sets of permanent magnet means. A U-shaped armature is provided which is locked to each pole piece, and a coil is provided in a magnetic circuit composed of the two permanent magnet means, the magnetic material member, and the armature. By driving the coil, a magnetic flux is generated in a direction that cancels the magnetic flux in the armature caused by the permanent magnet means, and both ends of the armature are locked to the other pole pieces of the two sets of permanent magnet means. A relay characterized in that the armature is slid so that the armature is moved.