JPH0810656B2 - Electromagnet device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnet device suitable for application to, for example, a relay for which noise reduction is desired.

[0002]

2. Description of the Related Art Generally, an electromagnet device constitutes a part of a magnetic path together with a yoke which forms a part of a magnetic path and has a contact surface at an end, an electromagnetic coil wound around the yoke, and the yoke. In addition, the armature has an armature surface corresponding to the armature surface of the yoke and controls the excitation of the electromagnetic coil so that the armature is attracted to or separated from the armature surface of the yoke. . Therefore, when the armature sucks or separates, it collides with the yoke and generates a collision noise. If such an electromagnet device is applied to a relay as a contact drive unit, it will generate undesired noise, especially when the relay is a household electric device, etc., and thus, in recent years, there has been an increasing demand for this collision noise reduction. . In other words, there is a demand for an electromagnet device suitable for a relay that is desired to reduce noise.

A typical electromagnet device in consideration of reduction of collision noise has a means as shown in FIG. 13 for a polar type and as shown in FIG. 14 for a non-polar type. That is, a cushioning member 3 such as an elastic body made of resin or a spacer is fixed to the contact surface between the yoke 1 and the armature 2 to cushion the impact when the armature 2 collides. 4 is an electromagnetic coil, 5 is a permanent magnet, and 6 is a stopper.

[0004]

The above-mentioned conventional electromagnet device requires a considerable thickness of the cushioning member in order to sufficiently enhance the cushioning effect against the impact. Then, when the armature is attracted to the yoke, a large magnetic gap is generated between the two, resulting in a decrease in the magnetic attraction force and another problem such as a decrease in the displacement of the armature.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent collision noise between the armature and the yoke without causing problems such as a decrease in magnetic attraction force to the armature and a decrease in displacement amount. It is to provide an electromagnet device that can be reduced.

[0006]

In order to solve the above problems, an electromagnet device according to a first aspect of the present invention is movable relative to the armature surface of a yoke or an armature and is closer to the armature surface. A thin plate-shaped vibrating body having an extended free vibrating portion is additionally provided.

The electromagnet device according to a second aspect of the present invention has, as the vibrating body according to the first aspect, two opposing pieces and a connecting piece that connects them, and the distance between the opposing pieces is a yoke or a base side. It is approximately equal to the thickness of the armature, and the gap on the tip side is larger than the base side and is formed in a substantially U shape, and is attached to the yoke or the armature in a swingable manner. It is set as a part.

Further, the electromagnet device according to a third aspect is configured such that a viscous fluid is interposed between the vibrating body according to the first or the second aspect and the tangential pole surface of the yoke or the armature.

[0009]

In the electromagnet device according to the present invention, the vibrating body, especially the free vibrating portion S thereof vibrates immediately before the end of the operation of the armature, and the energy of collision is converted into the energy of vibration. The impact noise is reduced by reducing the impact noise, and since it is a thin plate, it is possible to reduce the influence of the magnetic attraction force to the armature and the displacement amount to the same extent as the conventional reciprocal plate.

In the electromagnet device according to the second aspect of the present invention, in particular, the vibrating body can be easily attached to the yoke in the case of the polar type and to the armature in the case of the non-polar type, and a space for the vibrating body is required. Therefore, the same effect as that of the first aspect is achieved.

Further, in the electromagnet device according to the third aspect, the impact relaxation at the time of collision of the armature is further enhanced by the viscosity of the viscous fluid.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention embodied in a non-polar type electromagnet device will be described below with reference to FIGS.

Reference numeral 11 denotes a yoke, and an I-shaped yoke piece 11a,
It consists of an L-shaped yoke piece 11b consisting of a short side and a long side to which the yoke piece 11a is fixed, and forms a part of the magnetic path of the whole electromagnet device together with an armature described later, and the end of the yoke piece 11a has a contact pole. It becomes a face. This I-shaped yoke piece 11a has an L-shaped yoke piece 11 having a thickness T at the end where the contact surface exists.
It is projected to the b side.

Reference numeral 12 is an electromagnetic coil, which is a yoke piece 11 of the yoke 11.
It is wrapped around a. The electromagnetic coil 12 controls excitation, that is, it is excited or demagnetized so that magnetic flux flows or disappears.

Numeral 13 is an armature, which has a flat plate shape and whose base end is supported by the end of the yoke piece 11b so as to be capable of angular displacement, and forms a part of the magnetic path of the entire electromagnet apparatus together with the above-mentioned yoke 11. The portion corresponding to the armature surface of the yoke piece 11a is the armature surface. The armature 13 is biased by a return spring (not shown) in the separating direction, and by controlling the excitation of the electromagnetic coil 12, the armature surface of the armature 13 is attracted to the armature surface of the yoke 11. It separates.

Reference numeral 14 denotes a stopper, which is provided at an appropriate distance from the contact surface of the yoke piece 11a in order to determine the separating position of the armature 13.

Reference numeral 15 denotes a vibrating body, which is a thin plate member and is movable relative to the contact surface of the yoke 11 or the armature 13 and free vibration extending from the vicinity of the contact surface of the yoke 11 and the armature 13. It has a part S. Specifically, the plate thickness is 0.03 mm
A large area facing long piece 15b formed by bending a copper plate material
And a short piece 15c with a small area and a connecting piece 15d that connects them.
Is formed in a U shape. The distance between the opposing pieces 15b and 15c on the base side is substantially the same as the end thickness T of the contact surface, and this is gripped, and preferably the opposing short piece 15c is attached to the ends. The opposing long piece 15b has an extended portion protruding from the outer shell of the armature 13 as its free vibration portion S, and when the armature surface of the armature 13 is separated from the armature surface of the yoke 11,
It gradually expands toward the tip so that it has a gap with the tangential surface.

When the electromagnetic coil 12 is demagnetized and the armature 13 is in contact with the stopper 14 and is stationary, when the electromagnetic coil 12 is excited, the armature surface of the armature 13 contacts the yoke piece 11a. The vibrating body 15 is attracted to the polar surface and presses the vibrating body 15. As a result, the vibrating body 1
5. In particular, the free vibration part S vibrates to convert the energy of collision into the energy of vibration, whereby the impact at the time of collision of the armature 13 is alleviated and the collision noise is reduced.

Next, a second embodiment of the present invention embodied in a polar type, more specifically, a polar four-gap type electromagnet device will be described with reference to FIGS. 3 to 5.

Reference numeral 21 denotes a yoke, which includes a central leg piece 21a and an opposing leg piece 21.
It has an E shape with b, 21c and connecting piece 21d. York 21
Is for forming a magnetic path with an armature described later, that is, for forming a part of the magnetic path of the entire electromagnet device, and the both end surfaces of the central leg piece 21a and the inner surfaces of the facing leg pieces 21b, 21c are in contact with each other. It becomes a pole face. As a specific manufacturing method, an I-shaped yoke piece is caulked and fixed to a yoke piece bent in a U shape, or an E-shaped thin plate piece is laminated.

Reference numeral 22 denotes an electromagnetic coil, which is a center leg piece 21 of the yoke 21.
It is wrapped around a. The electromagnetic coil 22 switches the direction of the magnetic flux with reference to the center leg 21a by controlling the excitation, that is, by changing the excitation direction.

Reference numeral 23 is an armature, and the opposing armature pieces 23b, 23c
And a permanent magnet 23d sandwiched between them forms a U-shape. The armature 23 forms a magnetic path with the above-mentioned yoke 21, that is, forms a part of the magnetic path of the entire electromagnet device together with the yoke 21, and connects the central leg piece 21a and the opposing leg pieces 21b, 21c. Opposite armature piece corresponding to the pole surface
Both sides of 23b and 23c are the pole faces. Therefore the opposite armature piece
The distance W between 23b and 23c is the center leg 21a and the opposing leg 21b and 21c.
And the length of the opposing armature pieces 23b, 23c is relatively short. The armature 23 is displaceably supported by a movable frame (not shown) so that the opposing armature pieces 23b and 23c are located between the leg pieces of the yoke 21, and the excitation of the electromagnetic coil 22 is controlled to control the armature 23. The contact surface is attracted to or separated from the contact surface of the yoke 21.

Reference numeral 25 denotes a vibrating body, which is movable by a thin plate material as in the first embodiment with respect to the contact surface of the yoke 21 or the armature 23 and near the contact surface of the yoke 21 and the armature 23. It has a free vibrating part S extending further. Specifically, two facing pieces 25 are made of a copper plate material having a plate thickness of about 0.03 mm.
It has b and 25c and a connecting piece 25d that connects them.
The distance between 25b and 25c is approximately equal to the thickness T of the yoke 21 on the base side.
(More specifically, it is slightly larger.) However, it is formed in a substantially U shape in which the distance on the tip side is smaller than the distance W between the opposing armature pieces 23b, 23c, but larger than the base side. As will be apparent from the description of the operation to be described later, the vibrating body 25 has one of the two facing pieces 25b and 25c alternately forming the free vibrating portion S. The vibrating body 25 is swingably supported by the end of the central leg piece 21a of the yoke 21. For this support, appropriate measures are taken, such as forming a fall-out prevention part on the base of the built-in relay.

5 (a) to 5 (d) show the operation of this electromagnet device. Now, when the armature 23 is stationary in the state of (a), when the electromagnetic coil 22 is excited in the predetermined direction, the armature surfaces of the opposing armature pieces 23b and 23c have the central leg pieces 21a and the opposite leg pieces.
It is attracted to the tangential surface of 21c and displaced in the direction of the arrow, and immediately before the end of the operation, the opposing armature piece 23b contacts the opposing piece 25b of the vibrating body 25 as shown in (b). And Amachiya 23
Although it is further displaced to the position shown in (c), during this period, each part of the vibrating body 25, especially the opposing piece 25c vibrates, and therefore the armature
The energy of collision of 23 is converted into the energy of vibration, whereby the impact at the time of collision of the armature 23 is alleviated and the noise of collision is reduced. In other words, in this operation, the opposing piece 25c
Is the free vibration part S of.

If the electromagnetic coil 22 is excited in the opposite direction when the armature 23 is stationary in the state of (c), this time
The state of (a) is reached through the state of (d), and in the meantime, the vibrating body 25 similarly acts. Therefore, in this operation, conversely
25b is the free vibration part S of the vibrating body 25.

When the influence of the vibrating body 25 on the noise was measured, it was confirmed that the sound pressure could be reduced by about 5 dB as compared with the case without it.

Next, a third embodiment of the present invention embodied in a non-polar type electromagnet device will be described with reference to FIGS. 6 to 8. This is a combination of the electromagnet device of the first embodiment with the I-shaped yoke piece slightly deformed and the vibrator of the second embodiment deformed. Therefore, for members having similar basic functions, the 10th position is set to 3, and the 1st position is associated with the reference numeral of the previous embodiment.

That is, the I-shaped yoke piece 31a has a simple rod-like shape, unlike the first embodiment, in which the end having the contact surface is not projected toward the L-shaped yoke piece 31b. . Further, the stopper 34 is provided at an appropriate distance W from the contact surface of the yoke piece 31a in order to determine the separating position of the armature 33.

The vibrating body 35 has two facing pieces 35b, 35c and a connecting piece 35d for connecting them, and the distance between the facing pieces 35b, 35c is substantially equal to the thickness T of the yoke 31 on the base side ( The distance between the tip side is smaller than the distance W between the tangential surface of the yoke piece 31a and the stopper 34, but is larger than the base side.
It is swingably supported at the end of 33. 35e is a bent portion that is further connected from the tip of the facing piece 35c, and
Keeps him from dropping out of Amatya 33. Reference numeral 35f is an opening provided in the facing piece 35c so that a contact pressure spring can be attached to the opening when incorporated in a relay.

FIGS. 8A to 8D show the operation of this electromagnet device. Now the electromagnetic coil 32 is demagnetized
When the electromagnetic coil 32 is excited while 33 is stationary in the state of (a), the armature surface of the armature 33 is attracted to the armature surface of the yoke piece 31a and displaced in the arrow direction, and the operation ends. Immediately before, as shown in (b), the facing piece 35b of the vibrating body 35 is
Abut on the contact surface of 31a. Then, the armature 33 is further displaced to the position shown in (c), but during this period, each part of the vibrating body 35, especially the opposing piece 35c vibrates, and thus the collision energy of the armature 33 is converted into vibration energy, which causes the armature 33 to vibrate. The impact at the time of collision of 33 is mitigated and the collision noise is reduced. That is, in this operation, the facing piece 35c becomes the free vibrating portion S 1 of the vibrating body 35.

When the electromagnetic coil 32 is demagnetized while the armature 33 is stationary in the state of (c), the state of (d) is passed through to the state of (a), and the vibrating body 35 is the stopper during that time.
It has a relationship with 34 and acts similarly. Therefore, in this operation, on the contrary, the facing piece 35b becomes the free vibrating portion S of the vibrating body 35.

Next, a fourth embodiment of the present invention will be described with reference to FIGS.
It will be explained based on 10. This is the one in which the shape of the vibrating body of the second embodiment is modified and a viscous fluid is further added. For members having the same basic function, the tenth place is ranked 4 and the first place corresponds to the second embodiment. The detailed description of the other members is omitted.

The vibrating body 45 of this one is composed of two facing pieces 45b,
45c and a connecting piece 45d connecting these, both facing pieces 45b,
The distance of 45c is approximately equal to the thickness T of the yoke 41 on the base side (specifically, slightly larger), and the distance on the tip side is opposite the armature piece 43.
In addition to having a substantially U-shaped portion that is smaller than the distance W of b, 43c but is larger than the base side, the opposing armature piece 43b,
A bent piece 45h that forms a box shape from either side edge of 43c,
45h are arranged in a row and are swingably supported by the ends of the central leg piece 41a of the yoke 41.

Reference numeral 46 is a viscous fluid. Specifically, contact lubricating oil that does not adversely affect the electric performance even if it adheres to the contact portion of the relay is used. Intervened in.

In such an electromagnet device, the speed reduction effect of the armature described in the second embodiment is further enhanced by the viscous fluid. By actually measuring the noise caused by the vibrating body and the viscous fluid, it was confirmed that the sound pressure could be reduced by about 7 dB compared to the case without them.

The viscous fluid can also be used in the first to third embodiments, and the viscosity of the viscous fluid can further enhance the effect of reducing the speed of the armature.

Such an electromagnet device, for example, a relay to which the modification of the second embodiment is applied, is as shown in FIGS. 11 and 12. In the figure, 51 is a base, 52 is a cover, 53
Is a fixed contact portion of the main contact device, 54 is a movable contact portion, 55 is a fixed contact portion of the auxiliary contact device, and 56 is a movable contact portion. yoke
21 is a slightly deformed central leg piece 21a, opposed leg pieces 21b, 21c,
A coil frame 22a, which is composed of a connecting piece 21d and has the electromagnetic coil 22 wound therein, is attached to the central leg piece 21a. Opposite armature piece
The armature 23 including 23b, 23c and a permanent magnet 23d sandwiched between them is supported by a movable frame 57 pivotally supported by the coil frame 22a. The vibrating body 25 is swingably supported by the end of the central leg piece 21a.

[0038]

In the electromagnet device according to the first aspect of the present invention, the vibrating body, particularly the free vibrating portion S thereof, vibrates immediately before the end of the operation of the armature, and the energy of collision is converted into the energy of vibration. The impact sound at the time of collision is mitigated to reduce the collision noise, and because it is a thin plate, it is possible to reduce the influence of the magnetic attraction force to the armature and the displacement amount to the level of the conventional reciprocal plate. .

Further, in the electromagnet device according to the second aspect, particularly, the vibrating body can be easily attached to the yoke in the case of the polar type and to the armature in the case of the non-polar type, and the opposing pieces of the vibrating body are alternately free. Since it functions as a vibrating part, it does not require a space for a vibrating body and has the same effect as that of the first aspect.

Further, in the electromagnet device according to the third aspect, the impact relaxation at the time of collision of the armature is further enhanced by the viscosity of the viscous fluid.

As described above, these inventions can reduce the collision noise between the armature and the yoke without causing problems such as a decrease in the magnetic attraction force and a decrease in the displacement amount for the armature, and are suitable for a relay for quieting. It is possible to realize an electromagnet device.

[Brief description of drawings]

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

FIG. 2 is a perspective view of a main part member thereof.

FIG. 3 is a perspective view showing a second embodiment of the present invention.

FIG. 4 is a perspective view of a main part member thereof.

FIG. 5 is an explanatory diagram of the operation.

FIG. 6 is a perspective view showing a third embodiment of the present invention.

FIG. 7 is a perspective view of a main part thereof.

FIG. 8 is an explanatory diagram of the operation.

FIG. 9 is a perspective view showing a fourth embodiment of the present invention.

FIG. 10 is a perspective view of a main part member thereof.

FIG. 11 is a perspective view of a relay to which the electromagnet device according to the second embodiment of the present invention is applied.

FIG. 12 is an exploded perspective view thereof.

FIG. 13 is a perspective view showing a conventional polar type example.

FIG. 14 is a perspective view showing a non-polar conventional example.

[Explanation of symbols]

 11 Yoke 12 Electromagnetic coil 13 Armature 14 Stopper 15 Vibrating body S Free vibrating part of vibrating body

Claims (3)

[Claims] 1. A yoke which forms a part of a magnetic path and has a pole face at an end, an electromagnetic coil wound around the yoke, and a yoke which forms a part of the magnetic path together with the yoke and a pole face of the yoke. In an electromagnet device having an armature that has an armature surface corresponding to and that is attracted to or separated from the armature surface of the yoke by controlling the excitation of the electromagnetic coil, the yoke or armature An electromagnet device, further comprising a thin plate-shaped vibrating body, which is movable relative to the armature surface and has a free vibrating portion extending from the vicinity of the armature surface. 2. The vibrating body has two facing pieces and a connecting piece for connecting them, the distance between the facing pieces is approximately equal to the thickness of the yoke or the armature on the base side, and the distance on the tip side is the base portion. The electromagnet device according to claim 1, wherein the electromagnet device is formed in a substantially U-shape larger than the side, is attached to the yoke or the armature in a swingable state, and one of the facing pieces alternately serves as a free vibrating portion. 3. A viscous fluid is interposed between the vibrating body and the yoke or the armature contact surface of the armature.
Alternatively, the electromagnet device according to claim 2.