JPH06132114A - Electromagnet apparatus - Google Patents

Abstract

PURPOSE:To provide an electro-magnet apparatus which can reduce sound level of collision without resulting in reduction of attracting force and displacement and without the increase of size and rise of cost. CONSTITUTION:A fixed iron core 1, armatures 2a, 2b which are coupled with or separated from such fixed iron core 1 and an electromagnetic coil 3 causing the fixed iron core 1 to attract the armatures 2a, 2b are provided. The fixed iron core 1 is provided with a through hole 7. A couple of thin sheet materials 8a, 8b are provided to cover both end portions of the through hole 7. In this through hole, a viscous fluid 9 is sealed in such a degree as swelling only the one of the thin sheet materials 8a, 8b. Moreover, a stopper is also provided so that the thin sheet material 8b is pressed, for example, at the position where the armature 2a is separated from the fixed iron core 1.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Generally, an electromagnet device draws a fixed iron core, an armature that contacts and separates from the fixed iron core, and a magnetic flux between the armature and the fixed iron core to attract the armature to the fixed iron core. And an electromagnetic coil. This electromagnet device moves between the position where the armature collides with the fixed core and the position where the armature separates from the fixed core and collides with the stopper by the excitation of the electromagnetic coil. Therefore, collision noise is generated by the armature colliding with each of the fixed iron core and the stopper. When a relay to which such an electromagnet device is applied is incorporated in a household electric device or the like, the collision sound thereof is not preferable, and thus various proposals have been made in recent years to soften the collision.

The first conventional example is, for example, Shoukaisho 61-0098.
Like No. 08, a shock absorbing member such as an elastic body or a spacer formed of resin was fixed to the fixed iron core or the armature. The second conventional example is, for example, No. 63-139745 and No. 57-011098.
As described in No. 6, a piston is provided in a cylinder in which gas or liquid is sealed, and the piston is connected to an armature.

[0004]

However, in the first conventional example, when the elastic body and the spacer are made considerably thick in order to enhance the effect of reducing the collision noise, a large magnetic force is generated when the fixed iron core and the armature approach and separate from each other. This causes other problems such as the generation of a magnetic gap, the magnetic attraction force is significantly reduced, and the displacement of the armature is reduced.

Further, in the second conventional example, in order to enhance the effect of reducing the collision noise, the accuracy of fitting the piston and the cylinder is required, and when a liquid or a special gas is used, a sealing material is required. As a result, the cost becomes high, and the space required for the damper becomes large, so that the device becomes large in size, and the positioning of the damper and the electromagnet requires precision, which causes another problem such as an increase in assembly cost.

Therefore, an object of the present invention is to provide an electromagnet device which can reduce the collision noise without reducing the attraction force and the displacement amount, and without increasing the size and cost. Is.

[0007]

In the electromagnet device of the present invention, a fixed iron core, an armature that comes into contact with and separates from the fixed iron core, and a magnetic flux is supplied between the armature and the fixed iron core to cause the armature to move. Equipped with an electromagnetic coil that attracts to a fixed iron core,
A through hole is provided in the armature surface of either one of the fixed iron core and the armature, and the peripheral edge portion is in close contact with the rim portion of the through hole so as to cover both ends of the through hole, and the central portion can swell. A pair of thin-walled sheet materials, having a viscous fluid enclosed in the space formed by the pair of thin-walled sheet materials and the through holes to the extent that one of the thin-walled sheet materials swells, and the armature further comprises It is characterized in that it has a stopper at a position away from the fixed iron core, which is opposed to the contact surface of the fixed iron core and against which the thin sheet material is pressed.

[0008]

According to the structure of the present invention, when the armature is separated from the fixed core, the armature is stopped by the stopper, so that one of the thin-walled sheet materials is pressed by the stopper to fix the viscous fluid to the armature. Since the thin sheet material on the tangential pole side of the iron core is moved through the through hole, the thin sheet material swells. When the electromagnetic coil is energized, magnetic flux is supplied between the armature and the fixed iron core, the armature is attracted to the fixed iron core, and the thin sheet material contacts the fixed iron core or armature immediately before the armature collides with the fixed iron core. Then, the thin sheet material is pushed down, and the viscous resistance force when the viscous fluid passes through the through hole reduces the collision speed of the armature and reduces the impact force, so that the collision noise can be reduced. After the collision, since the thin sheet material on the stopper side is inflated with the viscous fluid, the reaction force due to the thin sheet material on the collision side does not occur.

In this case, since the viscous fluid is enclosed in the space formed by the through hole and the thin sheet material, and the viscous fluid is integrated with the fixed iron core or the armature, the conventional sealing material is required. In addition, the outer dimensions can be made smaller than the damper, and the degree of freedom in the shape of the electromagnet is increased.Furthermore, since positioning between the damper and the fixed iron core or armature is not required, the assembly cost can be reduced and the size can be reduced at a low cost. . In addition, since the thin sheet material is only interposed between the armature and the fixed iron core when the armature is attracted, the attraction force and the displacement amount are not reduced. As a result, it is possible to effectively reduce the occurrence of collision noises and vibrations generated by devices that use relays and electromagnets.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. That is, this is a four-gap electromagnet device, which includes a fixed core 1 having a central piece 4 and a pair of armatures 2.
It has a and 2b and an electromagnetic coil 3. The fixed iron core 1 is
It has a Y-shape consisting of a central piece 4 and both end pieces 5 and 6. A through hole 7 is formed in the contact surface of the tip of the central piece 4, and a peripheral portion is formed by an adhesive at the rim of the through hole 7 so that both ends of the through hole 7 are covered with a pair of thin sheet materials 8a and 8b. The central portion is allowed to swell in close contact, and the viscous fluid 9 is enclosed in the space formed by the pair of thin sheet members 8a and 8b and the through hole 7 to the extent that one of the thin sheet members 8a and 8b swells. ing. The thin sheet material 8 is a 25 μm polyethylene resin sheet as an example, the viscous fluid 9 is a contact lubricating oil as a viscous oil, and the diameter of the through hole 7 produces an optimum resistance force when the viscous fluid 9 passes through. As described above, it is determined in relation to the viscosity of the viscous fluid 9.

The armatures 2a, 2b contact and separate from the central piece 4 of the fixed iron core 1. In the embodiment, the armatures 2a, 2b face the armature surfaces having the through holes 7 on both sides of the tip of the central piece 4, respectively. The permanent magnet 10 is connected between the armatures 2a and 2b across the central piece 4 so that different magnetic poles are generated in the armatures 2a and 2b and they can operate integrally. When one armature 2a approaches the central piece 4, the other armature 2b moves away from the central piece 4 and the armature 2b moves toward the fixed core 1.
When the armature 2b approaches the central piece 4 on the contrary, the armature 2a approaches the end piece 6. In this case, when the armature 2a separates from the center piece 4, the armature piece 2b also serves as a stopper that locks to the center piece 4, and when the armature 2b separates from the center piece 4, the armature piece 2a moves to the center piece 4. Also serves as a stopper to lock.

The electromagnetic coil 3 supplies magnetic flux between the armatures 2a and 2b and the central piece 4 and the end pieces 5 and 6 of the fixed iron core 1 to attract one of the armatures 2a and 2b to the central piece 4. That is, when the electromagnetic coil 3 is energized in one direction, the central piece 4
Which has the same pole as the magnetic pole excited at the tip of the armature 2
a produces a repulsive force and causes a different polarity of the armature 2b to generate an attractive force, so that the armatures 2a and 2b move from (a) to (b) in FIG. 2 to (c). Further, when the electromagnetic coil 3 is energized in the other direction, the magnetic pole opposite to the above is excited at the tip of the center piece 4, the armature 2a produces an attractive force, and the armature 2b produces a repulsive force. ) To (a) through (d).

According to this embodiment, when the armature 2b is separated from the central piece 4 of the fixed iron core 1, the armature 2a serves as a stopper and stops, so that the thin sheet material 8a is attached to the armature 2a. Since the viscous fluid 9 is being pressed and is moving to the thin sheet material 8b on the side of the armature 2b through the through hole 7, the thin sheet material 8b swells as shown in FIG. 2 (a).

When the electromagnetic coil 3 is energized in one direction, as described above, an attractive force is generated between the armature 2b and the central piece 4, and a repulsive force is generated between the armature 2a and the central piece 4. Therefore, although the operation from (a) to (b) of FIG. 2 to (c) is performed, the thin sheet material 8b comes into contact with the armature 2b immediately before the armature 2b collides with the central piece 4, and the thin wall member 8b contacts the armature 2b. Sheet material 8
Since the b is pushed down and the viscous fluid 9 passes through the through hole 7, the collision resistance of the armature 2b is reduced by the viscous resistance force and the impact force is mitigated, so that the collision noise can be reduced. After the collision, since the thin sheet material 8a is inflated with the viscous fluid 9, the reaction force of the contact piece 2b due to the collision-side thin sheet material 8b does not occur.

When the electromagnetic coil 3 is energized in the other direction,
The armature 2 operates from (c) to (d) of FIG. 2 to (a). At this time, the armature 2a presses the thin sheet material 8a and the viscous fluid 9 moves through the through-hole 7 to reduce the thin wall. Sheet material 8b
And the thin sheet material 8a swells. According to this embodiment, the viscous fluid 9 is enclosed in the space formed by the through hole 7 and the thin sheet materials 8a and 8b, and the viscous fluid 9 is integrally formed with the fixed iron core 1. Since it does not require the sealing material, the external dimensions can be made smaller than the damper, and the degree of freedom of the shape of the electromagnet is increased, and since the positioning between the damper and the fixed iron core or the armature is not required, the assembly cost can be reduced and the low cost. Can be miniaturized at cost. In addition, since the thin sheet material is only interposed between the armature and the fixed iron core when the armature is attracted, the attraction force and the displacement amount are not reduced. As a result, it is possible to effectively reduce the occurrence of collision noises and vibrations generated by devices that use relays and electromagnets.

3 and 4 show an example in which this embodiment is applied to a relay. That is, 14 is a base, 11 is a partition, 12 is a contact device arranged outside the partition 11,
Reference numeral 3 is an auxiliary contact device, and 15 is an auxiliary contact stand. In the contact device 12, 16 is a movable contact plate, and 17 is a fixed contact terminal, which is mounted in the mounting holes 14 a and 14 b of the base 14. In the auxiliary contact device 13, 18 is a movable contact plate,
Reference numeral 19 denotes a fixed contact terminal, which is a mounting hole 1 for the auxiliary contact base 15.
It is attached to 4c and 14d. Reference numeral 21 denotes a yoke installed between the partition 11 and the auxiliary contact base 15, and a vertical piece having a hole 21a is erected at one end of the rectangular plate portion 21b, and a pair is formed from both sides of the other end in the same direction as the vertical piece. Both end pieces 5 and 6 are bent. Further, the end of the central piece 4 is fitted into and fixed to the hole 21a, and the tip is located between the end pieces 5 and 6. Reference numeral 27 denotes a coil frame, around which the electromagnetic coil 3 is wound, and the coil frame 27 penetrates the central portion of the central piece 4. 28 is a terminal provided on the coil frame 27. 31
Is a resin armature card, and the shaft 34 at one end
Is pivotally supported in the shaft hole 29 of the coil frame 27, and is provided so that the pair of armatures 2a and 2b face each other in the rotation direction of the other end.
The permanent magnet 10 is interposed between the armatures 2a and 2b, and the armatures 2a and 2b are located between the central piece 4 and both end pieces 5 and 6. Reference numeral 35 denotes a groove portion of the card 31, which engages with the movable contact plate 16 and drives the movable contact plate 16 to open and close in conjunction with the card 31. Reference numeral 39 is a drive protrusion for pressing and driving the movable contact plate 18. 40 is a case.

When an electric current is passed through the coil terminal 28, an attractive force and a repulsive force are generated in the armatures 2a and 2b, and the card 31 is rotated about the shaft 34 by the operation of the above-mentioned embodiment, and the contact device 12 and the auxiliary contact device are operated. 13 works. At this time, the armatures 2a and 2b are connected to the viscous fluid 9 of the thin sheet materials 8a and 8b.
Since it collides with the central piece 4 or the stopper via the, the collision noise can be prevented.

A second embodiment of the present invention is shown in FIGS. 5 and 6.
Shown in. That is, this is a non-polar electromagnet device, and the fixed iron core 1 includes a yoke 44 composed of a horizontal piece 42 and a vertical piece 43,
It is composed of a shaft core 45 which is erected on the horizontal piece 42 in parallel with the vertical piece 43. The coil frame 46 is passed through the shaft core 45,
A coil 47 is wound around this. The armature 2 has a flat plate shape, one end of which is rotatably supported by a well-known pivoting means at the tip of the vertical piece 43, and the center of which is opposed to the tip surface of the shaft core 45. A stopper 48 is provided on the opposite side of the armature 2 from the shaft core 45.
The armature 2 is urged in the opening direction by a spring (not shown) and stopped by the stopper 48.

The through-hole 7 is determined so as to generate an optimum viscous resistance force when passing through the through-hole 7 in consideration of the viscosity of the viscous fluid 9, but the through-hole 7 is formed in the armature 2 with a diameter of 1 mm. The peripheral edges of the thin sheet materials 8a and 8b made of a nylon resin sheet having a thickness of 25 μm are in close contact with both surfaces of the pole element 2, and the through-hole 7 is filled with a viscous fluid 9 such as silicon oil.

In this electromagnet device, when a current is passed through the electromagnetic coil 3, a magnetic flux is supplied between the shaft iron core 45 and the armature 2 so that an attractive force is generated in the armature 2 and, as shown in FIG. When the armature 2 approaches the shaft core 45 against the spring as shown in (c) through (b) and the current of the electromagnetic coil 3 is released, (c) through (d) in FIG. As described above, the armature 2 moves to the stopper 48 side by the spring force.

In this operation, thin sheet materials 8a, 8
b operates as follows. That is, in FIG. 6A, the thin sheet material 8b is pressed by the stopper 48, and the viscous fluid 9 presses the thin sheet material 8a to inflate it. (B) is in the middle of movement when the armature 2 is sucked by the shaft core 45, and the thin sheet material 8a starts to be pushed by the shaft core 45, and the viscous fluid 9 moves through the through hole 7 and the thin sheet material 8b.
Is in the state of starting to inflate. In (c), the armature piece 2 is completely attracted to the shaft core 45, the thin sheet material 8a is completely pressed, and the viscous fluid 9 moves to the through hole 7 and the thin sheet material 8b to maximize the thin sheet material 8b. In this process, the armature piece 2 receives a viscous resistance force when it collides with the shaft core 45, the impact is alleviated, the collision noise disappears, and the viscous fluid 9 moves so that the reaction force also disappears. (D)
Stops the excitation of the electromagnetic coil 3 and the armature piece 2 starts to return by the spring, the thin sheet material 8b is pressed by the stopper 48, and the viscous fluid 9 starts moving through the through hole 7 to the thin sheet material 8a side. However, the thin sheet material 8a is in the state of starting to swell and reaching (a). In this way, even when the armature piece 2 collides with the stopper 48, the viscous fluid 9 moves in the through hole 7, so that the collision can be alleviated and the collision noise can be reduced.

The viscous fluid 9 may be gas instead of liquid.

[0023]

In the electromagnet device of the present invention, since the viscous fluid is enclosed in the space formed by the through-hole formed in the armature piece or the fixed iron core and the thin sheet material, the armature piece is attracted to the fixed iron core. Or, the collision noise at the time of opening and closing can be reduced, and since the viscous fluid is formed integrally with the fixed iron core or the armature, the conventional sealing material is not required and the external dimensions can be made smaller than the damper, and the electromagnet can be made smaller. Since the degree of freedom of the shape is increased, and further, the positioning between the damper and the fixed iron core or the armature is not required, the assembly cost can be reduced and the size can be reduced at a low cost. In addition, since the thin sheet material is only interposed between the armature and the fixed iron core when the armature is attracted, the attraction force and the displacement amount are not reduced. As a result, there is an effect that it is possible to effectively reduce the occurrence of collision noise and vibration generated from a device that uses a relay or an electromagnet.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a first embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating an operation of a viscous fluid.

FIG. 3 is an exploded perspective view of an example applied to a relay.

FIG. 4 is a perspective view thereof.

FIG. 5 is a perspective view of a second embodiment.

FIG. 6 is an explanatory diagram illustrating an operation of a viscous fluid.

[Explanation of symbols]

 1 Fixed iron core 2a, 2b Armature 3 Electromagnetic coil 7 Through hole 8a, 8b Thin sheet material 9 Viscous fluid

Claims (1)

[Claims] 1. A fixed iron core, an armature that contacts and separates from the fixed iron core, and an electromagnetic coil that supplies a magnetic flux between the armature and the fixed iron core to attract the armature to the fixed iron core. A through hole is provided in the armature surface of either one of the fixed iron core and the armature, and the peripheral edge portion is in close contact with the rim portion of the through hole so as to cover both ends of the through hole, and the central portion can swell. A pair of thin-walled sheet materials, having a viscous fluid enclosed in the space formed by the pair of thin-walled sheet materials and the through holes to the extent that one of the thin-walled sheet materials swells, and the armature further comprises An electromagnet apparatus comprising: a stopper at a position apart from the fixed iron core, the stopper being pressed against the thin-walled sheet material facing the contact pole surface of the fixed iron core.