JPH03141617A - Electromagnetic device - Google Patents

Abstract

PURPOSE:To curtail the number of parts so as to decrease the dispersion of stroke by making a card at the same time with the magnetic pole face of an armature as a mold reference face, and also making a projection at the card. CONSTITUTION:An electromagnetic device is composed of a coil 1, a yoke 2, an armature 3, and a card 4. The yoke 2 is nearly U-shaped that a coil through part 6 and a yoke part 7 have continued, and the top of the through part 6 is a magnetic pole part 8, and the top of the yoke 7 is a fulcrum part 9. The armature 3 is made in L shape in which a crook 10 magnetically couples capably in rotation with a fulcrum part 9 and which has a magnetic pole face 11 facing the magnetic pole part 8 it one piece 12 and has the other piece 13 opposed to the side face of the fulcrum part 9. The card 14 is made at the same time at the other piece 13 with the magnetic pole face 11 as a mold reference plane X. Moreover, a projection 13, which forms space between the other piece 13 and the yoke part 7 in the condition that the magnetic pole face 11 of one piece 12 is separated from the magnetic pole part 8, is made at the card 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electromagnet device applied to an electromagnetic relay or the like.

[Conventional technology]

A conventional example is shown in FIG. 4, that is, this electromagnetic device is
A coil 50, a penetration portion 51 that penetrates the coil 50 in the axial direction, and a yoke portion 5 located on the outer side of the coil 50.
2 is approximately U-shaped and continuous at one end side, and the through portion 51
A yoke 55 has a magnetic pole part 53 at its tip and a fulcrum part 54 at the tip of the yoke part 52, and a bending part 56 is rotatably magnetically coupled to the fulcrum part 54 and has a magnetic pole face 66 facing the magnetic pole part 53. an L-shaped armature 59 having one piece 57 and the other piece 58 facing the side surface of the fulcrum portion 54;
The card 60 attached to the other piece 58 and the other piece 5
8 and with the magnetic pole face 66 separated from the magnetic pole part 53, the other piece 5B and the yoke part 52
and a non-magnetic protrusion 68 forming a gap therebetween. 61 is a movable contact 6 driven by the card 60
2, a movable contact plate 63 has a fixed contact 64, and 65 a movable contact plate 61 and a fixed contact plate 63.
This is the base that fixes the base of the.

This tf! The one-stone device is a flamper-type electromagnet, which converts the attractive force acting between one piece 57 of the armature 59 and the magnetic pole portion 53 of the yoke 55 into the other piece 58 of the armature 59, and uses a card 60 to double as a return spring. Since the movable contact plate 61 is driven, there is an advantage that a long card stroke and a large suction force can be obtained.

FIG. 5 shows another conventional example in which the card 60 is not provided.

[Problem to be solved by the invention]

However, in this electromagnet device, the bending accuracy of the angle θ when bending the armature 59 into an abbreviated shape is poor, and as a result, the position of the card 60 with respect to the magnetic pole face 66 is ΔX.
In particular, since the stroke of the card 60 relative to the stroke of the magnetic pole face 66 has become larger due to the enlargement of the lever ratio of the armature 59, the variation including the stroke position of the card 60 becomes large. card 6
If the zero stroke varies, as shown in FIG. 6, the attractive force characteristics change, resulting in a disadvantage that the characteristic values of the electromagnetic relay vary greatly.

Even when there is no card 60 as shown in FIG. 5, due to variations in the bending angle θ of the armature 59, the movable contact plate 61
The disadvantage was that the armature stroke varied greatly depending on the drive position.

On the other hand, as shown in FIG.
Since the coil 50 will not operate even if the coil 50 is energized unless it is to a certain extent, a protrusion 68 is provided at the tip 67 of the armature 59. However, since the protrusion 68 is a separate component, the cost is high, and the gap Δy varies depending on the attachment of the protrusion 68, which causes variations in card strokes.

Therefore, an object of the present invention is to provide an electromagnet device that can reduce the number of parts and reduce variations in card strokes.

[Means to solve the problem]

The electromagnet device of the present invention has a substantially U-shape in which a coil, a through portion penetrating the coil in the axial direction, and a yoke portion located on the outer side of the coil are continuous at one end, and the tip of the through portion is a magnetic pole. a yoke with a tip of the yoke part as a fulcrum part, a bent eyelid part rotatably magnetically coupled to the fulcrum part, and a magnetic pole face facing the magnetic pole part in one piece, facing the side surface of the fulcrum part; an L-shaped armature having another piece that
a card simultaneously molded on the other piece with the magnetic pole surface as a mold reference surface, and a gap is provided between the other piece and the yoke portion when the magnetic pole surface of the one piece is separated from the magnetic pole portion. The card is characterized in that a protrusion forming the same is molded on the card.

[Effect]

According to the configuration of the present invention, the armature is biased so that its magnetic pole face separates from the magnetic pole part of the magnetic material.
When the coil is energized, magnetic flux flows through the magnetic material penetration portion, yoke portion, and armature, and an attractive force is generated between the magnetic pole portion and the magnetic pole surface of the armature, causing the armature to rotate. On the other hand, since the card was simultaneously molded using the armature's magnetic pole surface as the mold reference surface, even if the bending angle of the armature varies during manufacturing, the position where the card's spring system etc. is driven relative to the armature's magnetic pole surface, that is, the card position, will vary. Since it does not stick, variations in stroke can be reduced and stable suction force can be obtained. Furthermore, since the protrusions are molded onto the card, there is no variation in the cards due to protrusions, and the number of parts can be reduced.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 and 2. That is, this electromagnet device consists of a coil 1, a yoke 2, an armature 3, and a card 4.

The coil l is wound around the coil frame 5.

The yoke 2 has a substantially U-shape in which a penetration part 6 that penetrates the coil 1 in the axial direction and a yoke part 7 located on the outside of the coil 1 are continuous at one end, and the tip of the penetration part 6 is a magnetic pole part 8, and the yoke The penetrating part 6, which has the tip of the part 7 as a fulcrum part 9, is a rod-shaped body, and the magnetic pole part 8 has a brim shape, and penetrates into the hollow part of the coil frame 5, and the magnetic pole part 8 is locked to the edge of the hollow part. There is. The yoke portion 7 is L-shaped, and the end portion 17 of the penetrating portion 6 opposite to the magnetic pole portion 8 is fitted into the hole 15 of one piece of the yoke portion 7 and fixed by tightening. It is fixed at Furthermore, locking tongues 7a are provided protruding from both sides of the yoke portion 7.

The armature 3 has an L-shape in which a bending part 10 is rotatably magnetically coupled to a fulcrum part 9, one piece 12 has a magnetic pole face 11 facing the magnetic pole part 8, and the other part 13 faces a side surface of the fulcrum part 9. I am doing it. Further, a thin card attachment portion 14 is formed at the tip of the other piece 13.

The card 4 has the other piece 13 with the magnetic pole surface 11 as the mold reference surface X.
are simultaneously molded. Further, a protrusion 34 is formed on the card 4 to form a gap between the other piece 13 and the yoke part 7 when the magnetic pole surface 11 of one piece 12 is separated from the magnetic pole part 8. This card 4 is a non-conductor and the card attachment part 14 of the other piece 13
It has a locking projection 18 in the opposite direction to the projection 34 on the tip part away from the fulcrum part 9 of the card 4, and the engaging projection 18 is shown, for example, by a chain line (details are shown in FIG. 3). The movable contact plate 22 is engaged with the engagement hole 27 of the contact plate 22, and the engagement protrusion 18 drives the movable contact plate 22 at the card position Y, where the engagement protrusion 18 becomes the pressing surface of the root. In this case, since the card position Y is positioned with respect to the mold reference plane X by simultaneous molding, it is constant regardless of the bending angle θ of the armature 3, and therefore the card position Y with respect to the magnetic pole face 11 of the armature 3 is constant. becomes. FIG. 2 shows a concrete simultaneous molding method, in which the protrusion 15a of the mold 15, 16 is attached to the base of the card attachment part 14.

16a come into contact, and the molding material is poured into the molds 15 and 16 from the direction Z to perform simultaneous molding. In this case, even if the bending angle θ of the armature 3 varies and the other pieces 13 vary from the solid line to the one-dot chain line. However, by simply correcting the angle of the thin card attachment part 14 as shown by the arrow, the protrusions 15a and 16a of the molds 15 and 16 can be fixed to the armature 3.
can be brought into contact with.

This electromagnetic device is biased so that the magnetic pole face 11 of the armature 3 is separated from the magnetic pole part 8 of the yoke 2.
When the coil 1 is excited, the penetrating portion 6 of the magnetic body 2 is excited. Yoke part 7
Then, magnetic flux flows through the armature 3, an attractive force is generated between the magnetic pole portion 8 and the magnetic pole surface 11 of the armature 3, and the armature 3 rotates.

According to this embodiment, since the card 4 was simultaneously molded using the magnetic pole surface 11 of the armature 3 as the mold reference surface X, even if the bending angle θ of the armature 3 varies during manufacturing, the card Since the position where the spring system etc. in step 4 is driven, that is, the card position IY, does not vary,
Stroke variation can be reduced and stable suction force can be obtained. Further, since the protrusion 34 is molded on the card 4, there is no variation in the card 4 due to the protrusion 34, and the number of parts can be reduced.

FIG. 3 shows a relay to which this electromagnet device is applied. Reference numeral 19 denotes a base, which has a housing recess 20 for housing the armature 3 formed on its upper surface, a locking hole 35 formed in its side wall, and the locking tongue piece 7a of the yoke portion 7 locking in the locking hole 35. By this, the yoke 2 having the coil 1 is fixed to the base 19, and a concave curved portion 19a is formed at the end of the storage concave portion 20.
is formed to support the outer surface of the bent portion 10 of the armature 3 so that the bent portion 10 contacts the fulcrum portion 9.

Reference numeral 22 designates a movable contact plate whose base portion 22a is inserted and fixed into the fixing groove 23 of the base 19, which fixes the movable contact 24 and integrally forms the movable contact terminal 25, and which is engaged with the engaging portion 18 of the card 4. , a piece 12 of the armature 3 is attached to the magnetic pole part 8
An engagement hole 27 is formed which urges the body to return in the direction away from the body. Reference numeral 29 denotes a fixed contact plate whose base portion 29a is inserted and fixed into the fixing groove 21 of the base 19, which fixes the fixed contact 30 and also integrally forms the fixed contact terminal 31. 32
3 is a coil terminal formed integrally with the coil frame 5, and 33 is a case surrounding the entire body.

In this relay, when not energized, the movable contact plate 22 pushes the card 4 so that one piece 12 of the armature 3 separates from the magnetic pole part 8 of the yoke 2, and the protrusion 34 pushes the card 4 away from the fulcrum part 8 of the yoke part 7.
The movable contact vi22 is returned to its original position and the movable contact 24 is separated from the fixed contact 30. When the coil 1 is excited, the magnetic pole surface 11 of the armature 3 resists the spring force of the movable contact plate 22.
is attracted to the magnetic pole portion 8, so that the armature 3 rotates and undergoes an angular displacement, the movable contact plate 22 operates via the card 4, and the movable contact 24 contacts the fixed contact 30.

When the coil 1 is de-energized, the movable contact plate 22 returns the rear armature 3 to its original position.

〔Effect of the invention〕

According to the electromagnet device of the present invention, since the card is simultaneously molded using the magnetic pole surface of the armature as the mold reference surface, even if the bending angle of the armature varies during manufacturing, the spring system etc. of the card is driven against the magnetic pole surface of the armature. Since the position of the card, that is, the position of the card, does not vary, variations in the stroke can be reduced and a stable suction force can be obtained. Furthermore, since the protrusions are molded onto the card, there is no variation in the cards due to the protrusions, and the number of parts can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the present invention, Fig. 2 is a partial sectional view illustrating simultaneous card molding, Fig. 3 is an exploded perspective view of a relay to which this electromagnet device is applied, and Fig. 4 is a conventional one. FIG. 5 is a cross-sectional view of another conventional example, and FIG. 6 is a characteristic diagram of card stroke versus attraction force. DESCRIPTION OF SYMBOLS 1... Coil, 2... Yoke, 3... Armature, 4... Card, 6... Penetration part, 7... Yoke part, 8... Magnetic pole part, 9... Fulcrum Part, 10...Bent part, 11...Magnetic pole surface, 12...One piece, 13...Other piece, 34...Protrusion, 4th Figure 16 Zuto - 'S)n-ri (mm)

Claims (1)

[Claims] A coil, a penetration part that penetrates the coil in the axial direction, and a yoke part located on the outer side of the coil have a substantially U-shape that is continuous at one end, and the tip of the penetration part is a magnetic pole part, and the tip of the yoke part an L-shaped yoke having a fulcrum part, a bent part rotatably magnetically coupled to the fulcrum part, one piece having a magnetic pole face facing the magnetic pole part, and the other part facing a side surface of the fulcrum part. an armature; and a card simultaneously molded on the other piece with the magnetic pole surface as a mold reference surface, and the other piece and the yoke portion are molded in a state where the magnetic pole surface of the one piece is separated from the magnetic pole portion. An electromagnet device characterized in that a protrusion forming a gap therebetween is formed on the card.