JP2755364B2 - Rotating fulcrum type polarized electromagnet and rotating fulcrum type polarized relay incorporating this - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating fulcrum type polarized electromagnet and a rotating fulcrum type polarized relay incorporating the same.

[0002]

2. Description of the Related Art FIG. 6 is a sectional view of a single-stable type polarized electromagnet as an example of a conventional rotating fulcrum type polarized electromagnet.
FIG. 7 shows a perspective view of the armature. A conventional single-stable type polarized electromagnet 100 is a coil block 101 assembled by winding a coil 101A around a substantially U-shaped iron core 101B.
And the opposite magnetic pole 102A and magnetic pole 1 of the iron core 101B.
Angle permanent magnet 103 fixed by laser welding or the like between 02B
And an armature 104 that rotates about a fulcrum 104C in contact with the peak of the mountain-shaped permanent magnet 103.

The armature 104 has a non-magnetic metal piece 105 fixed to one of the end 104A and the end 104B (104B in the figure) by welding or the like, and the end 104A and the end 104B are connected to the coil block 2 respectively. Pole face 102
a, a non-magnetic metal piece 1
05 has high magnetic resistance (104B side in the figure)
It is configured to be.

The mountain-shaped permanent magnet 103 is preliminarily magnetized to have S poles at both ends in the longitudinal direction and N poles at the center, provide a concave portion at the peak of the mountain shape, support the fulcrum 104C (convex portion) of the armature 104, and In order to maintain the arrangement accuracy when the single-stable type polarized electromagnet 100 is formed, the magnet is fixed between the magnetic poles 102A and 102B by laser welding or the like.

[0005] As described above, the armature 104 is connected to the fulcrum 104C.
, The ends 104A and 104B of the magnetic pole surfaces 102a and 102B of the magnetic poles 102A and 102B, respectively.
b, so that the mountain-shaped permanent magnet 10 is in a non-excited state in which power is not applied to the coil block 2.
The single-stable type polarized electromagnet 100 is formed because the end portion 104A having a small magnetic resistance always contacts the magnetic pole surface 102A by the magnetizing action of No. 3 to form a monostable state.

Further, a single-stable type polarized electromagnet 1
00 indicates that when a power supply having a predetermined polarity is applied to the coil block 101, one of the magnetic poles (for example, the magnetic pole 10
2A), the connection is switched to the other magnetic pole (for example, magnetic pole 102B), and when the power is removed, the magnetic pole is returned to the original magnetic pole (for example, magnetic pole 102A).

Next, the single stable operation of the conventional single-stable type polarized electromagnet 100 will be described with reference to FIG. FIG. 8A shows a non-excitation stable state in which power is not applied to the coil block 101,
Due to the increase in the magnetic resistance of the non-magnetic metal piece 105 fixed to B, the armature 104 has its end 104A having a lower magnetic resistance rotating around the fulcrum 104C toward the magnetic pole 102A, and the end 10
4A comes into contact with the pole face 102a to form a monostable (single stable) state. In this state, the iron core 101B
Of the magnetic pole 102A side-the mountain-shaped permanent magnet 103-the armature 104
(End 104A side)-A magnetic circuit is formed with the magnetic pole 102A side of the iron core 101B as a loop, the magnetic flux Φa is generated in the direction of the arrow, and a stable state is formed.

[0008] Immediately after excitation from the non-excitation state when a power source having a predetermined polarity is applied to the coil block 101 as shown in FIG. 1B, the coil block 101 forms an electromagnet.
The magnetic pole 102A side is the N pole and the magnetic pole 102
The current I flowing through the coil 101A is magnetized to the south pole on the B side.
And a force corresponding to the product of the number of turns of the coil (the number of turns N) acts on the magnetic pole 102A side of the armature 104 with the same pole (N pole) as a repulsive force, and the magnetic pole 102B side of the armature 104 with a different pole ( S
(Pole), suction force acts on each. In this state, together with the magnetic flux Φa, the iron core 101B, the mountain-shaped permanent magnet 103, the armature 104 (end 104B), the non-magnetic metal piece 105,
A magnetic circuit is formed with the iron core 101B on the magnetic pole 102B side and the iron core 101B as a loop, a magnetic flux Φb is generated in the direction of the arrow, and a strong magnetic force (attractive force) acts between the end 104B and the magnetic pole 102B.

FIG. 2C shows the state of FIG.
04 is separated from the pole face 102a and the end 1
04B is the magnetic pole surface 102b via the non-magnetic metal piece 105
Shows the inverted state in contact with. In this state, the armature 10
4 is in contact with the end surface 104B and the pole face 102b.
(B) The magnetic flux Φb in the figure changes (increases) to become the magnetic flux Φd, and the magnetic pole 102B side of the iron core 101B-the mountain-shaped permanent magnet 103-the armature 104 (end 104B) -the nonmagnetic metal piece 105- A magnetic circuit having a loop formed by the magnetic pole 102B side of the iron core 101B is formed, and a magnetic flux Φc is generated in the direction of the arrow, and the end portion 104B and the magnetic pole surface 102b come into contact with each other to exert a stronger magnetic force (attractive force).

When the power supply is removed from this state, the end 104B
Due to the increase in the magnetic resistance of the non-magnetic metal piece 105 fixed to the core, the mountain-shaped permanent magnet 103 acts in the same manner as in the first state, and the magnetic pole 102A side of the iron core 101B-the mountain-shaped permanent magnet 10
3-A magnetic pole 104 (end portion 104A) -A magnetic circuit having a loop formed by the magnetic pole 102A side of the iron core 101B is formed, and a magnetic flux Φa is generated in the direction of the arrow in FIG.
4 is an end portion 104A having a low magnetic resistance around the fulcrum 104C.
Rotates again to the magnetic pole 102A side, and the end 104A comes into contact with the magnetic pole surface 102a to recover to a monostable (single stable) state.

As described above, since the conventional single-stable type polarized electromagnet 100 performs a monostable operation, the armature 10
4 is provided with a movable contact (not shown),
A single stable relay is configured by performing electrical connection switching with a fixed contact (not shown) by the electromagnet action of.

[0012]

In the conventional rotating fulcrum type polarized electromagnet 100, the magnetic resistance on both sides of the fulcrum 104C of the armature 104 is made asymmetric, so that the armature 10
Since the thin non-magnetic resistant metal piece 105 is fixed to the end 104A or 104B of the fourth member by welding or the like, the number of parts increases, a welding process is required, and it is very difficult to maintain constant welding conditions. There is a problem that the thickness of the non-magnetic metal piece varies, which not only increases the cost but also causes variations in the impression and opening characteristics when used in a relay.

The present invention has been made to solve such a problem, and its object is to omit a non-magnetic metal piece.
An object of the present invention is to provide a rotating fulcrum type polarized electromagnet which has less variation in impression and opening characteristics when used for a relay.

[0014]

According to the present invention, there is provided a rotating fulcrum type polarized electromagnet according to the present invention, wherein a thin film insulating portion covering one magnetic pole of the iron core is provided on the coil frame holding the iron core. And are formed integrally with it. In the rotary fulcrum type polarized relay according to the present invention, the coil frame holding the iron core is formed integrally with a thin film insulating portion covering one magnetic pole of the iron core.

Further, in the rotary fulcrum type polar electromagnet and the rotary fulcrum type polar relay incorporating the same according to the present invention, a convex portion is formed at a portion where the armature comes into contact with the permanent magnet. Is used as a rotation fulcrum to rotate the armature.

[0016]

According to the present invention, there is provided a rotating fulcrum type polar electromagnet and a rotating fulcrum type polar relay incorporating the same, wherein the coil frame for holding the iron core has a thin film insulating portion covering one magnetic pole of the iron core. Since it is integrally formed, the thickness of the thin-film insulating portion in place of the non-magnetic metal piece can be accurately formed.

In the rotary fulcrum type polar electromagnet and the rotary fulcrum type polar relay incorporating the same according to the present invention, a convex portion is formed at a portion where the armature comes into contact with the permanent magnet, and the convex portion is connected to the rotary fulcrum portion. Since the armature is rotationally moved as described above, the rotational movement of the armature can be ensured with the convex portion as a fulcrum.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2 show the configuration of a rotating fulcrum type polarized electromagnet according to the present invention. FIG. 1 is a configuration diagram of an electromagnet block of the rotating fulcrum type polarized electromagnet according to the present invention, and FIG. 1 shows a sectional view of a rotating fulcrum type polarized electromagnet.

1 and 2, a rotating fulcrum type polarized electromagnet 1 is a single-stable type, in which a coil 2A is wound around a substantially U-shaped iron core 2B, and a magnetic pole 3A of the coil block 2 is provided. A flat yoke 4 having a magnetic resistance adjusting portion 4B formed of a penetrating portion or a cutout portion, while being inserted and fixed between the 3B and forming a magnetic circuit with the iron core 2B.
And a rectangular permanent magnet 5 disposed in a concave portion 4A provided to be biased to one side from the central portion of the flat yoke 4 and a convex portion 6C provided in the central portion as a fulcrum. 6B is constituted by the magnetic pole 3A side and the armature 6 which comes into contact with the magnetic pole 3B side, respectively.

The coil block 2 includes a coil electrode (+) 2
a, an electromagnet is formed by applying a power source whose polarity is determined in advance between the coil electrodes (-) 2b, and the magnetic pole 3 corresponding to the direction of the current flowing through the coil 2A (right thumb rule).
A and 3B polarities (N and S poles) are set, while the product of the number of turns of the coil 2A and the value of the current flowing through the coil 2A (magnetomotive force)
And a magnetic flux that is inversely proportional to the resistance (magnetic resistance) of the magnetic circuit.

The coil block 2 has a magnetic pole surface 3a and a magnetic pole surface 3b formed on the upper surfaces of the magnetic poles 3A and 3B, respectively, and extends a coil frame 2C on the magnetic pole surface 3b to increase magnetic resistance. A thin film insulating portion 7 instead of a metal piece is formed on the pole face 3b. The thin film insulating section 7
At the same time as the coil frame is formed, it is formed to a thickness of about several tens of μm. As a specific method of forming the thin film insulating portion, first, an iron core is set in a cavity of an injection mold for molding a coil frame. At this time, a minute gap into which the molten resin flows is formed between one magnetic pole of the iron core and the inner surface of the injection mold. In this state, the molten resin is injected into the mold and cooled, thereby holding the iron core in the resinous coil frame and simultaneously forming the thin film insulating portion covering the magnetic pole surface of one magnetic pole. In addition, it goes without saying that the method of forming the thin film insulating portion is not limited to the above method.

As described above, the thin-film insulating portion 7 is
And the end 6B of the armature 6 is in contact with the end 6B of the armature 6 via the thin-film insulating portion 7, so that the magnetic resistance on the side of the pole face 3b is smaller than the contact between the pole face 3a and the end 6A. The magnetic pole surface 3a and the magnetic pole surface 3b are set asymmetrically with respect to the center line X to form a monostable (single stable) state. In addition, the thin film insulating portion 7
Can be changed by changing the area formed on the pole face 3b.

As shown in FIG. 1, the plate-shaped yoke 4 has a rectangular permanent magnet 5 formed by forming an asymmetric rectangular recess 4A at the center line X between the opposed magnetic poles 3A and 3B of the coil block 2. And the magnetizing action of the rectangular permanent magnet 5 is asymmetric with respect to the center line X.

The plate-shaped yoke 4 forms the magnetoresistive adjusting portion 4B which is formed by a penetrating portion or a cutout portion which increases the magnetic resistance on the side where the volume of the concave portion 4A is smaller than the center line X. When forming the plate-shaped yoke 4, the magnetoresistive adjusting section 4B
It can be formed simultaneously by punching or the like.

The rectangular permanent magnet 5 is provided in the recess 4A so as to be accommodated in the rectangular recess 4A provided in the flat yoke 4.
And magnetized so that the surface in contact with the bottom surface of the concave portion 4A becomes the S pole and the opposite surface becomes the N pole.

As described above, the concave portion 4A and the magnetic resistance adjusting portion 4B are provided in the flat yoke 4, and the rectangular permanent magnet 5 is disposed in the concave portion 4A so that the magnetization action and the magnetic resistance are asymmetric with respect to the center line X. By doing so, a monostable (single stable) state can be formed with a simple configuration.

The armature 6 is provided with a convex portion 6C at a portion in contact with the rectangular permanent magnet 5 on the center line X, and the armature 6 is magnetized by the magnetizing action of the rectangular permanent magnet 5 or the electromagnet.
, The end 6A, the pole face 3a, and the end 6B
And the magnetic pole surface 3b are in contact with each other via the thin film insulating portion 7.

As is clear from the sectional view of FIG.
The rotating fulcrum type polarized electromagnet 1 has a rectangular permanent magnet 5 arranged so as to be deviated from the center line X toward the magnetic pole 3A.
B is formed on the magnetic pole 3B side on the flat yoke 4,
By providing the thin-film insulating portion 7 in close contact with the magnetic pole surface 3b, the magnetoresistance on both sides is asymmetrical with respect to the cross section in which the center line X is lowered in the vertical direction, so that a stable single stable operation is possible. .

FIG. 3 is an explanatory view of the operation of the rotating fulcrum type polarized electromagnet according to the present invention. FIG. 3 (a) shows a non-excited stable state where power is not applied to the coil block 2 and the armature 6 The ends 6A and 6B are both N poles due to the magnetizing action of the rectangular permanent magnet 5. On the other hand, since the magnetic pole 3A is always in the S pole and the magnetic pole 3B is in the N pole state from the above-described configuration, the armature 6 is It is in a stable state in contact with the 3A side. In this state, a magnetic circuit is formed by a loop of the magnetic pole 3A, the flat yoke 4, the rectangular permanent magnet 5, the armature 6 (end 3A), and the magnetic pole 3A, and the magnetic flux Φ1 is generated in the direction of the arrow.

Immediately after the power supply whose polarity is determined in advance is applied to the coil block 2 from the non-excitation state as shown in FIG. Since the pole and the magnetic pole 3B change from the N pole to the S pole, a repulsive force acts on the armature 6 and the magnetic pole 3A, and an attractive force acts on the armature 6 and the magnetic pole 3B. In this state, in addition to the magnetic flux Φ1 in FIG. 7A, a magnetic circuit is formed by a loop of the iron core 2B, the plate-shaped yoke 4-iron core 2B accompanying the application of power,
A magnetic flux Φ2 is generated.

FIG. 3C shows a reversal state in which the armature 6 is separated from the magnetic pole 3A side and comes into contact with the magnetic pole 3B side from the state shown in FIG. In this state, the magnetic poles 3B
-Plate yoke 4-Rectangular permanent magnet 5-Armature 6 (end 3
B) A magnetic circuit is formed by the loop of the thin film insulating portion 7-the magnetic pole surface 3 b-the magnetic pole 3 B to generate the magnetic flux Φ3, and the electromagnet causes the iron core 2 B-the plate-like yoke 4-the rectangular permanent magnet 5-contact. Pole 6 (end 3B) -thin film insulating part 7-magnetic pole face 3b
A magnetic circuit is formed by the loop of the magnetic pole 3B and the iron core 2B, and a magnetic flux Φ4 is generated.

When the power supply is removed from this state, the magnetic resistance of the armature 6 on the magnetic pole 3B side (end 6B side) is larger than that on the magnetic pole 3A side (end 6A). Φ1) becomes larger than the magnetic flux Φ3, the armature 6 reverses, the end 6A comes into contact with the magnetic pole 3A side, returns to the non-excited state of FIG. 6A, and maintains a monostable (single stable) state.

FIG. 4 is an assembly diagram of a polarized relay incorporating the rotating fulcrum type polarized electromagnet having the above-described structure, and FIG. 5 is an overall configuration diagram of the polarized relay. The same reference numerals are given.

In the assembly drawing of FIG.
Reference numeral 0 designates a case for accommodating the polarized electromagnet block 20, and two sets of a power terminal (+) 11A and a power terminal (-) 11B for applying power to the coil 2A of the polarized electromagnet block 20; The two fixed contacts 12A, which make contact with the four contact springs 31A of the spring block 30 to form break contacts of two circuits, the fixed contacts 13A, which form make contacts of two circuits, and the fixed contacts 12A, respectively. Contact terminal 12B, two fixed contact terminals 13B electrically connected to fixed contact 13A, contact spring block 3
It is provided with two fixed pieces 14 and a common terminal 14B that are electrically connected to the fixed portion 31C of the “0”.

A fixing portion 31C of the contact spring block 30 is fixed to the fixing piece 14 on the side surface of the body block 10 by laser welding or the like, and the movable contact 31B of the contact spring block 30 and the body block are fixed via the fixing portion 31C and the fixing piece 14. 1
The 0 common contact terminal 14B is in an electrically conductive state.

The polarized electromagnet block 20 is inserted into and fixed to the body block 10, the contact spring block 30 is arranged on the rectangular permanent magnet 5 of the polarized electromagnet block 20, and the fixing portion 31C of the contact spring block 30 is attached to the body. Block 10
5 can be assembled in one direction by fixing to the fixing piece 14 by laser welding or the like, and the rotating fulcrum type polar relay 50 shown in FIG.

In the rotating fulcrum type polarized relay 50 assembled in one direction as described above, the rectangular permanent magnets 5 are provided so as to be biased toward the magnetic poles 3A and constitute a single-stable type relay. In the non-excited state where power is not applied to the coil 2 </ b> A, the armature 6 of the contact spring block 30 moves the end 6
A is in contact with the magnetic pole 3A, and the rectangular permanent magnet 5
-A magnetic circuit for generating magnetic flux is formed by a loop of the armature 6-the magnetic pole 3A-the plate-shaped yoke 4-the rectangular permanent magnet 5, and the end 6A of the armature 6 is monostable with stable contact with the magnetic pole 3A ( (Single stable) state is maintained.

In the monostable state, the movable contact 31B disposed on the end 6A side of the armature 6 of the contact spring block 30 contacts the fixed contact 12A of the body block 10, and as a result, the fixed contact terminal of the body block 10 12B and the common contact terminal 14B form an electrically conductive state.

On the other hand, the coil 2 of the polarized electromagnet block 20
In an excited state in which a power source having a polarity set in advance to A is applied, the polarized electromagnet block 20 forms an electromagnet, the armature 6 rotates around the projection 6C, and the end 6A of the armature 6 is rotated.
Is separated from the magnetic pole 3A, the end 6B of the armature 6 comes into contact with the magnetic pole 3B, and the iron core 2B-the plate-shaped yoke 4 (the magnetic resistance adjusting section 4
B)-Rectangular permanent magnet 5-Armature 6-Magnetic pole 3B-Iron core 2
A magnetic circuit that generates a magnetic flux in the loop of B is formed, and the end 6B of the armature 6 maintains a stable state of contact with the magnetic pole 3B as long as power is applied.

In this state, the movable contact 31B arranged on the end 6A side of the armature 6 of the contact spring block 30 is separated from the fixed contact 12A of the body block 10 and arranged on the end 6B side of the armature 6. The movable contact 31B contacts the fixed contact 13A of the body block 10, and as a result, the fixed contact terminal 12B of the body block 10 and the common contact terminal 14B
Are electrically insulated (break state) and fixed contact terminal 1
3B and the common contact terminal 14B form an electrically conductive state (make state).

In this state, when the power applied to the coil 2A of the polarized electromagnet block 20 is removed, the armature 6 is inverted, returns to the initial non-excited state, and is fixed to the fixed contact terminal 12B of the body block 10 and the common contact terminal. 14B returns to a stable state in which an electrical conduction state is formed.

[0042]

As described above, the rotating fulcrum type poled electromagnet and the rotating fulcrum type poled relay incorporating the same according to the present invention are provided on one of the magnetic poles composed of a U-shaped iron core. Because a part of the coil frame was extended to form a thin-film insulation part,
It is possible to accurately form a thin film thickness in place of a nonmagnetic metal piece.
Accordingly, the rotating fulcrum type polarized electromagnet and the rotating fulcrum type polarized relay incorporating the same have less variation in the impression and opening characteristics, and also have a smaller amount because they do not use a non-magnetic metal plate as in the related art. It can be configured by the number of parts.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an electromagnet block of a rotating fulcrum type polarized electromagnet according to the present invention.

FIG. 2 is a sectional view of the rotating fulcrum type polarized electromagnet.

FIG. 3 is an explanatory view of the operation of the rotating fulcrum type polarized electromagnet.

FIG. 4 is an assembly drawing of a relay incorporating the rotating fulcrum type polarized electromagnet.

FIG. 5 is an overall configuration diagram of a polarized relay incorporating the rotating fulcrum type polarized electromagnet.

FIG. 6 is a configuration diagram of one embodiment of a conventional rotating fulcrum type polarized electromagnet.

FIG. 7 is a perspective view of a contact of the rotating fulcrum type polarized electromagnet.

FIG. 8 is a diagram illustrating the operation of a conventional single-stable type polarized electromagnet.

[Explanation of symbols]

1 ... rotating fulcrum type polarized electromagnet 2 ... coil coil block
2A: coil, 2B: iron core, 2C: coil frame, 2a, 2
b ... Coil electrode, 3A, 3B ... Magnetic pole, 3a, 3b ... Magnetic pole face, 4 ... Plate-shaped yoke, 4A ... Concave part, 4B ... Magnetic resistance adjustment part, 5 ... Rectangular permanent magnet, 6 ... Armagnet, 6A, 6B: end portion, 6C: convex portion, 7: thin-film insulating portion.

Claims (3)

(57) [Claims] 1. A coil block in which a coil is wound around a U-shaped iron core provided with a coil frame and opposing ends form magnetic poles, a permanent magnet mounted between the opposing magnetic poles, and the permanent magnet And a rotating fulcrum type poled electromagnet having an armature that comes into contact with and rotates by the action of an electromagnet to contact the magnetic pole, wherein the coil frame holding the iron core has a thin-film insulation covering one magnetic pole of the iron core. A rotating fulcrum type polarized electromagnet, wherein the portion is formed integrally with the coil frame. 2. A polarized electromagnet block comprising a coil block wound around a substantially U-shaped iron core and having opposite ends forming magnetic poles, and a permanent magnet mounted between the opposing magnetic poles. And a rotating fulcrum type polar relay including a contact spring block including a contact armature block configured of a contact armature that contacts the permanent magnet and rotates by the electromagnetism of the polarized electromagnet block to contact the magnetic pole, and a movable contact. A rotating fulcrum type polar relay, wherein a thin film insulating portion covering one magnetic pole of the iron core is formed integrally with the coil frame on the coil frame holding the core. 3. The rotating fulcrum type polarized electromagnet according to claim 1 and the rotating fulcrum type polarized relay according to claim 2, wherein the armature contacts the permanent magnet to form a convex portion. A rotating fulcrum type poled electromagnet characterized by rotating the armature by using the projection as a rotating fulcrum, and a rotating fulcrum type polarized relay incorporating the same.