JPS6041635Y2 - electromagnetic switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an electromagnetic switch that is both electrically operated and manually operated.

Generally, electric musical instruments such as electronic organs are equipped with a large number of switches in order to change the volume, tone color, etc. and provide various effects.

In this case, it may be necessary to activate more than one switch to provide the desired effect.

However, it is quite difficult to activate two or more switches simultaneously during a performance.

In order to produce the effect of activating one preset switch, it is sufficient to configure the system so that one switch is activated at the same time, but in that case, it becomes necessary to use an electromagnetic type for one set of switches. .

As such an electromagnetic switch, for example,
As shown in No. 17066, both ends of a movable yoke that is swingably supported are bent into a substantially arc shape, and two coils are attached to an iron core forming two electromagnetic circuits. It is known that each end portion corresponding to the bent portion is curved, and a pair of contacts are selectively driven by the bent portion of the movable yoke.

However, the manufacturing of the movable yoke and the iron core, especially both ends of the electromagnetic switch, is troublesome, and the electromagnetic switch has a predetermined shape.
Since it is difficult to obtain the curvature, it is troublesome to adjust the gap between the movable yoke and the iron core.

Further, in the electromagnetic switch shown in US Pat. No. 2,699,085, an arc-shaped cross arm is attached to the tip of an armature that is swingably supported, and the end face of an iron core constituting an electromagnet is connected to the cross arm. The curved surface corresponds to the curvature of the arm, so as with the electromagnets mentioned above, the production of the cross arm and iron core is troublesome, making it difficult to assemble,
There were problems such as requiring a long time for adjustment work.

Furthermore, all conventional devices have been difficult to make smaller and thinner due to their structure.

This idea was made in view of these circumstances,
We provide an electromagnetic switch that has a simple structure, can be made smaller and thinner, is easier to manufacture, and can be easily assembled and adjusted. A first magnet is rotatably disposed and has an operating lever, and the first magnet is disposed with a slight gap between the magnet and the first magnet in the thickness direction of the first magnet. a second magnet that is always opposed to one of the magnetic poles of the first magnet, and a second magnet that is arranged outside the rotation area in the direction of rotation of the magnet in correspondence with the magnetic pole of the first magnet; one of the first and second magnets is an electromagnet, and by switching the direction of the current flowing through the electromagnet, the magnetic force acting between the two magnets causes the The reason is that the magnet No. 1 is rotated, and the switch is changed based on this rotation.

This invention will be described in detail below based on embodiments shown in the drawings.

FIG. 1 is a partially cutaway front view of an electromagnetic switch according to this invention, and FIG. 2 is a cross-sectional view taken along line I--I in FIG. 1.

In these figures, the electromagnetic switch 1 includes a case body 5 fixed to the back side of the operation surface of the control panel 2 via a spacing member 3, and the inside of the case body 5 is formed in a substantially U-shape. It is integrally constituted by a front plate 6a and a rear plate 6b that face each other in the front and back, and a connecting plate 6C that connects the upper ends of these two plates 6ay6b. A yoke 6 is provided which is rotatably supported in the left and right direction.

The upper end surface of a rectangular permanent magnet 7 is fixed to the center of the lower surface of the connecting plate 6C.

The polarity of the permanent magnet 7 is, for example, as shown in FIG. 1, with the left half magnetized as N pole and the right half as S pole. electromagnet 1
0a and 10b are provided, respectively.

The front electromagnet 10a is fixed to the inner bottom surface of the case body 5, and is disposed between the front plate 6a of the yoke 6 and the permanent magnet 7 without contacting them.

Similarly, the rear electromagnet 10b is also fixed to the inner bottom surface of the case body 5, and is disposed between the rear plate 6b of the yoke 6 and the permanent magnet 7 in a non-contact state with the permanent magnet 7. It faces the electromagnet 10a.

Each iron core 9 of the electromagnets 10a, 10b is disposed at a position that is perpendicular to the surface of the permanent magnet 7 and always faces one of the magnetic poles of the permanent magnet 7.

That is, when the permanent magnet 7 tilts together with the yoke 6 and comes to rest on the left side, for example, as shown by the solid line in FIG.
It faces the south pole, and conversely, when it stands still on the right side as shown by the chain line in FIG. 1, it faces the north pole.

A pair of reed switches 11 and 12 are fixed to the left and right inner wall surfaces of the case body 5 so that when the permanent magnet 7 tilts left and right and comes to rest at that position, it closely opposes each magnetic pole on the tilting side. The lead wires 13 of these reed switches 11 and 12 are led out from the case body 5 and connected to an electric circuit (not shown).

Further, a protrusion 20 formed on the upper surface of the case body 5 and protruding outward from the hole 14 is integrally provided on the connecting plate 6c of the yoke 6, and the protrusion 20 is provided with a manual operation lever 1.
One end of 5 is fixed by a set screw 16.

The tip of the operating lever 15 projects outside through a cutout window 17 formed in the control panel 2.

Note that 18 is a coil spring for keeping the yoke 6 stationary in the tilted position.

Next, the operation of the above configuration will be explained.

In the state shown in FIG. 1, that is, when the yoke 6 is tilted clockwise and its S pole faces the iron core 9 of the electromagnets 1ea and 10b, current is applied to the coil 8 of the rear electromagnet 10b. When flowing, an electromagnetic circuit is formed, and the end face of the iron core 9 of the electromagnet 10b facing the permanent magnet 7 is magnetized to the S pole, and the end face on the opposite side is magnetized to the N pole.

Therefore, the S pole of the electromagnet 10b and the S pole of the permanent magnet 7 face each other and repel each other, and due to this repulsive force, the permanent magnet 7 along with the yoke 6 moves around the spindle 4 as shown by the chain line in FIG. Tilting to the right - The north pole of the permanent magnet 7 faces the south pole of the electromagnet 10b, thereby maintaining that state.

In this state, the S pole of the permanent magnet 7 closely opposes the reed switch 12, causing the reed switch 12 to operate.

Further, in this state, the power supply to the electromagnet 10b is cut off, but since the yoke 6 is held by the coil spring 18, it will not be restored.

Next, when a current is passed through the coil 8 of the electromagnet 10a on the front side, an electromagnetic circuit is formed, and the end face of the iron core 9 of the electromagnet lea facing the permanent magnet 7 becomes the north pole, and the end face on the opposite side becomes the south pole. Because of the magnetization, the north pole side of the iron core 9 and the north pole of the permanent magnet 7 face each other and repel each other.

Therefore, the permanent magnet 7 is tilted forward by this repulsive force to closely face the reed switch 11, thereby operating the reed switch 11.

When the yoke 6 tilts to the left, the current to the electromagnet 10a is cut off, but the yoke 6 is held in that state by the coil spring 18.

Note that if the direction of the current flowing through the coils 8, 8 of both electromagnets 10a, 10b is reversed during the switching operation, both electromagnets 10
It is also possible to simultaneously excite magnets a and 10b to tilt the permanent magnet 7.

Furthermore, when manually switching the reed switches 11 and 12, the operating lever 15 may be rotated left and right, that is, in the direction indicated by the mark.

In this way, in this invention, an electromagnet is provided whose iron core always faces one of the magnetic poles of a rotatably provided permanent magnet, and a pair of reed switches are provided corresponding to each magnetic pole of the permanent magnet. , the structure is extremely simple and assembly work is easy, and the distance between the permanent magnet and the permanent magnet can be easily adjusted by using a reed switch.

In this case, not only reed switches but also leaf switches, microswitches, etc. may be used, but leaf switches have the advantage that they have fewer contact failures than the above-mentioned switches and can perform more reliable switching operations.

In addition, in the above embodiment, one permanent magnet 7 and two electromagnets 1 are used.
0a and 10b, but for example, as shown in FIG. 3a, two permanent magnets 7 and one electromagnet 10 may be provided, or as shown in FIG. It will be obvious that the same effect can be obtained by using one each of 10.

Moreover, the yoke 6 to which the permanent magnet 7 is fixed is not limited to this,
For example, the frame body may be made of a material such as plastic.

4 and 5 show another embodiment of this invention, in which an electromagnet 31 with a coil 30 wound thereon is fixed to one inner wall surface of a frame 32 made of plastic or the like, and The two magnetic poles 34a and 34b of the electromagnet 31 are attached to the permanent magnet 7 fixed to the magnet 5 and inserted into the frame 32.
One of the two is always facing the other.

Note that all other configurations are configured similarly to the above embodiment, so the same reference numerals are given and explanations thereof will be omitted.

Even in such a configuration, if the direction of the current flowing through the coil 30 is changed, the permanent magnet 7 and the magnetic pole 34a or 34b can be changed.
It will be obvious that the reed switches 11 and 12 can be operated in the same way as in the above embodiment, since the frame body 32 is rotated by repelling and attracting each other.

In this case, if both ends of the coil 30 are pulled out from the case body 5 through the internal space of the coil spring 18, disconnection accidents can be reduced.

As explained in detail above, the electromagnetic switch according to the invention includes a first magnet which has a manual operation lever and is rotatably arranged, and a first magnet which is fixed to the device fixing part side. A second magnet is disposed with a slight gap in the thickness direction of the magnet and always faces the magnetic pole of either one of the first magnets, and one of these magnets is connected to an electromagnet. By switching the direction of the current flowing through this electromagnet, the first magnet is rotated by the magnetic force acting between both magnets, and the switch is operated based on this rotation. It is extremely simple, allows for miniaturization and thinning, and is not only easy to assemble and adjust, but also allows for more reliable switching operations, which is extremely effective.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing an embodiment of the electromagnetic switch according to this invention, Fig. 2 is a cross-sectional view taken along the line I-I in Fig. 1,
Figures 3a and 3b are side views showing another embodiment of this invention;
FIGS. 4 and 5 are a front view and a schematic side view showing still another embodiment of this invention.

Claims (1)

[Scope of utility model registration request] The first one has a manual operation lever and is located near the rotation.
a second magnet which is arranged with a slight gap in the thickness direction of the first magnet and whose one magnetic pole always corresponds to one of the magnetic poles of the first magnet; , a switch disposed outside the rotation area in the direction of rotation of the first magnet corresponding to the magnetic pole of the first magnet, the switch moving closer to and away from the rotation area as the magnet rotates; Either one of the magnets is configured with an electromagnet, and by switching the direction of the current flowing through the electromagnet, the first magnet is rotated by the magnetic force acting between the two magnets, and this rotation operates the switch. An electromagnetic switch characterized by: