JPH05109525A - Electromagnet apparatus - Google Patents

Abstract

PURPOSE:To enable an electromagnet apparatus of uniform attraction force by constituting so that the length of a gap which generates attraction force may be determined by the thickness of a spacer. CONSTITUTION:Spacers 31a, 31b are extended to attraction faces 5d, 5e, and a second yoke 10 is made movable with a space kept at a clamp 7a of the second yoke 10 and a bobbin 7. An OFF state allows a magnetic flux of a permanent magnet 9 to keep a plunger 5 in a state that its attraction face 5a is attracted by side face of a first yoke 8 leaving a gap of the thickness of a spacer 31a. At this time, attraction force acts also between the attraction face 5e and the second yoke 10, so that the second yoke 10 moves in arrow mark B direction until contact with the attraction face 5e leaving a gap of the thickness of a spacer 31b. The length of a gap which generates attraction force is determined by the thicknesses of the spacers 31a, 31b. This design can provide an electromagnet apparatus of uniform attraction force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnet device used, for example, in a remote control relay.

[0002]

2. Description of the Related Art FIG. 4 is a side view showing an off state of a conventional remote control relay, FIG. 5 is a side view showing a main part of FIG. 4, and FIG.
FIG. 6 is a side view showing an ON state. The outer shell is composed of a base 1 and a cover 2, and has a groove 1 for a mounting bracket (not shown) at the bottom.
a and DIN rail (not shown) mounting claws 1b, an opening 1c is formed in the upper part, and they are integrally combined by rivets 3 at four holes 1d. As shown in FIG. 4, the operating electromagnet device 4 is housed in an upright position with respect to the bottom portion (mounting surface) of the base 1 with the protruding side of the plunger 5 at the substantial center of the base 1.
The electromagnet device 4 is of a polar type, and as shown in FIGS. 5 and 6, the plunger 5 is slidably arranged so as to penetrate through the bobbin 7 around which the electromagnet coil 6 is wound, and is attracted to both ends. It has surfaces 5a, 5b. Spacers 31a and 31b made of non-magnetic material are provided on the attraction surfaces 5a and 5b, respectively.
Are fixed, and the suction surfaces 5a and 5b and the first yoke 8 are fixed.
To ensure an appropriate gap GapA. The first yoke 8 contacts the outer surface of the bobbin 7,
An opening 8a through which the tip 5c of the plunger 5 projects is formed on the upper surface. A pair of permanent magnets 9 are arranged on the left and right inner side surfaces of the first yoke 8 and are in contact with the same kind of poles. A pair of U-shaped second yokes 10 are respectively in contact with the other poles of the permanent magnet 9, and an appropriate gap GapB is secured between the attracting surfaces 5d and 5e by the engaging portion 7a of the bobbin 7. Is positioned so as to surround the electromagnetic coil 6. A link 12 for transmitting the movement of the plunger 5 to the movable contact 11.
Is located above the operating electromagnet device 4, is rotatably supported by a pin 13, and has one end 12a connected to the plunger tip 5c by a pin 14. Movable contact part 15
Has one end slidably engaged with an insulator 17 connected to the other end 12b of the link 12 by a pin 16 and a groove 17a formed at the other end of the insulator 17 so that the movable contact 11 is fixed. It is composed of a mover 18 and a compression coil spring 19 arranged to act on the movable contact 11 to press the contact, and the movable contact 11 is arranged opposite to a fixed contact 21 fixed to the main circuit terminal 20 so as to be contactable and separable. Has been done. Insulator 1
The convex portion 17a formed on the groove 7 is engaged with the groove 1d of the base 1 and the groove (not shown) of the cover 2, and the movable contact portion 15 moves in the contact contact / separation direction in conjunction with the plunger 5. Driven to. The mover 18 is electrically connected to another main circuit terminal 23 by a shunt 22. One of the pair of control terminals 24 for connecting the remote control electric wire is one of the lead wires 6a of the electromagnetic coil 6, and the other is the diode 2
5 and the electromagnetic coil 6 through the control circuit switch 26.
The other output line 6b is electrically connected to one printed circuit board 27. 28 is an operating lever, which is a pin 29 on the side opposite to the link 12 with respect to the plunger 5.
It is rotatably supported by a shaft, one end of which is connected to the tip portion 5c of the plunger 5 by a pin 14, and the plunger 5 is driven to rotate in the opposite direction to the link 12. The operating lever 28 is provided with a manual operating portion 28a that can be operated from the outside, which is arranged in the opening 1c of the base 1 and the cover 2. Further, there are display portions 28b on both sides of the manual operation portion 28a, and the O
The N and OFF states are displayed through the opening 1c. Further, the manual operation lever 28 acts on the actuator 26a of the control circuit switch 26 to open and close the control circuit switch 26.
I have

Next, the operation will be described. FIG. 5 shows a state in which the remote control relay is OFF. In this state, the attraction surface 5a of the plunger 5 is attracted to the bottom surface of the first yoke 8 by the magnetic flux of the permanent magnet 9 as shown in FIG. The contacts are in a stable position in the open state. In this main circuit open state, when the ON operation switch (not shown) connected to the control circuit terminal 24 is turned on and the electromagnetic coil 6 is excited, the plunger attraction surfaces 5a, 5
A magnetic flux is generated so that the attraction force by the permanent magnet 9 at d is reduced and the attraction force at the other attraction surfaces 5b and 5e is increased. As a result, the plunger 5 is driven in the direction of arrow A in FIG.
It is pushed down in the direction of 1, and the main circuit is closed. In this state, the suction surface 5b of the plunger 5 is suction-held on the upper surface of the first yoke 8. At this time, the operation lever 28 rotates in the clockwise direction in conjunction with the plunger 5, and the display changes from "OFF" to "ON". In this series of operations, the operating lever 28 actuates the actuator 26a of the control circuit switch 26, and the control circuit switch 26
Switch. On the other hand, in this main circuit closed state, OFF
When the operation switch is turned on, the electromagnetic coil 6 reduces the attraction force of the permanent magnet 9 on the plunger attraction surfaces 5b and 5e, and generates magnetic flux in the direction of increasing the attraction force on the other attraction surfaces 5a and 5d. As a result, the plunger 5 is driven in the direction of arrow A in FIG.
Is separated from the fixed contact 21. This brings the main circuit into a circuit state. This state is the suction surface 5a of the plunger 5.
Is the initial stable state of being adsorbed on the bottom surface of the first yoke 8. At this time, the operating lever 28 is interlocked with the plunger 5 and rotates counterclockwise to change the display from "ON" to "OFF".
At the same time, the control circuit switch 26 is switched.
Next, when the main contact is opened and closed manually from the outside, the contact can be opened and closed by operating the manual operation portion 28a of the operation lever 28 to directly drive the plunger 5. The operation in this case is to manually apply a peeling force equal to or greater than the attraction force of the plunger 5 to the plunger 5 to forcibly remove the attraction force to bring it into another stable state.
At this time, the movement of the movable contact portion 15 and the operation of the control circuit switch 26 are the same as the series of operations of the electric operation described above.

[0004]

The operation of the polarized electromagnet device is performed by passing an operating current through the electromagnetic coil, thereby canceling the magnetic flux of the permanent magnet on the attracting surface, reducing the attracting force, and releasing the plunger. However, in the conventional remote control relay as described above, the gap GapA between the suction surfaces 5a, 5b and the first yoke 8 is determined by the thickness of the spacers 31a, 31b and is uniform, but the gaps 5d, 5e and the second
Since the gap GapB with respect to the yoke 10 is determined by the dimensions of the bobbin 7 and the plunger 5, there is a problem that the variation is larger than that of GapA and therefore the variation of the suction force is large.

The present invention has been made in order to solve the above-mentioned problems, and an object thereof is to obtain an electromagnet apparatus having a small GapB variation and a small attraction force variation and good productivity.

[0006]

In the electromagnet device according to the present invention, for example, the spacers 31a and 31b are attached to the attracting surface 5.
The second yoke 10 is movable while extending to 5d and 5e, and the engaging portion 7 between the second yoke 10 and the bobbin 7 is formed.
A is provided with a space and has the following elements. (A) a first yoke having an internal space; (b) a movable body that is movable in at least two directions inside the first yoke; and (c) a movable body that is movable inside the first yoke and is movable. A first and a second suction portion, one of which comes into contact with the inner surface of the first yoke due to the movement of the body, and (d) a spacer provided on the movable direction side of the movable body of the first and the second suction portion,
(E) A movable body provided inside the first yoke and located between the first and second suction portions so that the movable body can come into contact with either of the first and second suction portions. A second yoke provided so as to be movable in the same direction as the possible direction.

[0007]

In the present invention, since the second yoke 10 is movable, the gap GapB between the attracting surfaces 5d and 5e and the second yoke 10 is uniform because it is determined only by the plate thickness of the spacers 31a and 31b. .. Therefore, the suction force is also uniform.

[0008]

EXAMPLES Example 1. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a remote control relay showing an OFF state, FIG. 2 is a view showing an OFF state which is a main part of FIG. 1, and FIG. 3 is a diagram showing an ON state, which are the same as or equivalent to those of the conventional one. Are denoted by the same reference numerals and description thereof will be omitted. In the figure, 31a and 31b are spacers made of a non-magnetic material whose tips are extended to the attraction surfaces 5d and 5e, and are fixed to the attraction surfaces. Second yoke 10
A space is provided between and the engaging portion 7a, and the space can move in the vertical direction in the figure.

In such a configuration, in the OFF state of FIG. 2, the magnetic flux of the permanent magnet 9 causes the attraction surface 5a of the plunger 5 to remain on the bottom surface of the first yoke 8 leaving a gap corresponding to the thickness of the spacer 31a. It is held in the adsorbed state. At this time, since the suction force is also exerted between the suction surface 5e and the second yoke 10, the second yoke 10 moves toward the arrow B.
In the direction of, the spacer 31b is moved until it comes into close contact with the suction surface 5e, leaving a gap corresponding to the plate thickness of the spacer 31b. For this reason, the length of the gap generating the suction force is
Determined only by the plate thickness of b. The same applies to the ON state of FIG. 3, and when the plunger 5 is driven in the direction of arrow A and held in a state of being attracted to the upper surface of the first yoke 8, the attraction surface 5d and the second yoke 10 are separated. The second yoke 10 moves toward the spacer 3 in the direction of arrow B because the attraction force also acts between them.
It moves until it comes into close contact with the suction surface 5d, leaving a gap corresponding to the plate thickness of 1a.

In this embodiment, a fixed contact and a movable contact for opening and closing the load circuit, a polar operation magnet device for driving the movable contact, a control switch for controlling the operation electromagnet device, and the operation electromagnet device In a remote control relay provided with an operation lever that opens and closes the control switch in conjunction with a plunger that performs forward and reverse motions, and a link that opens and closes the movable contact in conjunction with the plunger,
By inserting spacers made of non-magnetic material into all the gaps that generate the attraction force in the operation electromagnet device, the length of all the gaps that generate the attraction force is determined only by the thickness of the spacers. The remote control relay characterized by the above has been described.

Embodiment 2. In the above embodiment, the spacer 31
Although the case where a and 31b are extended to the adsorption surfaces 5d and 5e is shown, a spacer may be separately provided on each adsorption surface without extending.

Embodiment 3. In the above embodiment, all the spacers have the same thickness, but the spacers on the suction surfaces 5a and 5b have the same thickness, and the spacers on the suction surfaces 5d and 5e are
Although having the same thickness, the suction surfaces 5a, 5b and the suction surface 5d,
The spacers of 5e may have different thicknesses.

Embodiment 4. In the above embodiment, the case of the remote control relay is shown, but an electromagnet device used for other relays may be used. Further, an electromagnet device used other than the relay may be used.

[0014]

As described above, according to the present invention, the gap length for generating the attraction force in each of the ON state and the OFF state is determined only by the thickness of the spacer, so that the attraction force is uniform. There is an effect that an electromagnet device can be obtained.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention in an OFF state.

FIG. 2 is a side view of the movable contact portion and the operation electromagnet device according to the present invention in an OFF state showing the configurations thereof.

FIG. 3 is a side view showing an ON state of the present invention.

FIG. 4 is a side view of a conventional remote control relay showing an OFF state.

5 is a diagram showing a main part of FIG.

6 is a side view similar to FIG. 5, showing an ON state.

[Explanation of symbols]

 1 base 4 operation electromagnet device 5 plunger (an example of a movable body) 5a, 5b, 5d, 5e adsorption surface 8 first yoke 10 second yoke 12 link 15 movable contact portion 21 fixed contact 26 control circuit switch 28 operation Lever 31 spacer

Claims (1)

[Claims] 1. An electromagnet device having the following elements: (a) a first yoke having an internal space; (b) a movable body provided inside the first yoke so as to be movable in at least two directions; The first yoke is provided in the movable body inside the first yoke, and any one of the first yoke inner surface abuts due to the movement of the movable body.
And (2) a spacer provided on the movable direction side of the movable body of the first and second suction portions, and (e) a spacer provided inside the first yoke, and the first and second suction portions. A second yoke that is provided between the suction portions and is movably provided in the same direction as the movable direction of the movable body so that the movable body can come into contact with either of the first and second suction portions.