JPH09153322A - Electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an armature to make turning motion smoothly even when there is dispersion in dimensions and assembling accuracy of each member. SOLUTION: This relay is equipped with a base 1, and an electromagnet part 2 and a contact part 3 which are mounted on the base 1. The electromagnet part 2 is equipped with an iron core 21, a coil 22 wound around the iron core 21, a yoke 23 fixedly attached to the iron core 21, and an armature 24 which drives the contact part 3 to open/close by being attracted/released by the iron core 21. An inner side of the armature 24 is hinge-supported freely-turnably at an end part of the yoke 23 by an outer surface of a hinge part 24a being guided by guide surfaces of a pair of guide parts 11, 11 provided on the base 1, and the guide parts 11, 11 of the base 1 are formed so that they can be bent when the outer surface of the hinge part 24a of the armature 24 makes hitting contact with the guide surfaces.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge type electromagnetic relay in which an armature is rotatably supported by a yoke.

[0002]

2. Description of the Related Art Conventionally, as an electromagnetic relay of this type, FIG.
There exists a thing of a structure shown in FIG. This one has a base A and an electromagnet part B and a contact part C mounted on the base A. The electromagnet part B includes an iron core B1, a coil B2 wound around the iron core B1, and an iron core B1. The armature B4 is equipped with a yoke B3 fixed to B1 and an armature B4 that is released by suction from the iron core B1 to drive the contact part C to open and close. By being guided by the guide surface of the provided guide portion A1, the inside is rotatably supported by the end of the yoke B3.

More specifically, the armature B4 has a hinge portion B4a which is substantially L-shaped with one piece B4b which is suction-released to the iron core B1 and the other piece B4c which drives the contact point C to open and close. Hinge part B4a
The outer surface of is guided with a slight clearance between it and the guide surface of the guide portion A1 provided on the base A.

[0004]

In the above-described conventional electromagnetic relay, the structure in which the inner side of the hinge portion B4a of the armature B4 is rotatably supported by the end of the yoke B3 is hinged. Instead of pressing the outer surface of section B4a with the hinge spring, use the guide surface of guide section A1 provided on base A
Since the outer surface of B4a is guided with a slight clearance between the two surfaces, a member called a hinge spring is not required, and the coil B2 of the electromagnet section B is connected via the hinge spring having conductivity. The electrical insulation between the contact point C and the contact C does not deteriorate.

However, when the dimensions of the base A, the armature B4, etc. and the assembly accuracy vary greatly, the guide portion
The slight clearance existing between the guide surface of A1 and the outer surface of the hinge part B4a disappears, the outer surface of the hinge part B4a contacts the guide surface of the guide part A1, and the friction causes the armature B4 to move smoothly. It may stop rotating.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an electromagnetic relay in which an armature can smoothly rotate even if there are variations in dimensions and assembly precision of each member. To do.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 has a base and an electromagnet part and a contact part which are mounted on the base, and the electromagnet part comprises:
An iron core, a coil wound around the iron core, a yoke fixed to the iron core, and an armature that is sucked and released by the iron core to drive the contact part to open and close, and the armature, In an electromagnetic relay in which the hinge portion is hingedly supported by the yoke on the inner side by being guided by the guide surface of the guide portion provided with the outer surface on the base, the guide portion of the base is
The guide surface is configured to be bent when the outer surface of the hinge portion of the armature comes into contact with the guide surface.

According to a second aspect of the present invention, in the first aspect of the present invention, the armature is substantially L in which one piece that is suction-released by the iron core and the other piece that opens and closes the contact portion are both pieces.
It is formed by bending a central portion which becomes the hinge portion in a letter shape, and has a configuration in which a pair of the guide portions for guiding both side portions of the hinge portion are formed.

According to a third aspect of the present invention, in the first aspect of the present invention, the armature is substantially L in which one piece that is suction-released by the iron core and the other piece that drives the contact portion to open and close are both pieces.
It is formed by bending a central portion that becomes the hinge portion in a letter shape, and has the guide portion formed in parallel with one piece of the armature.

According to a fourth aspect of the present invention, in the third aspect, the guide surface of the guide portion is formed at substantially the same angle as the bending angle of the hinge portion.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. This stuff is base 1
It has an electromagnet section 2 and a contact section 3.

The base 1 is made of a thermoplastic resin material and is formed into a substantially flat plate shape. One side of the base 1 has an electromagnet portion 2 and a contact portion.
3 is installed.

The electromagnet section 2 includes an iron core 21, a coil 22, and a yoke 2.
3, the armature 24 is provided, the iron core 21 is formed of a magnetic material in a substantially rod shape, the coil 22 is wound around the iron core 11 via a coil frame 22a, and both ends thereof are coil frames. It is connected to the coil terminal 22b provided on 22a. The yoke 23 is made of a magnetic material in an L shape, one piece of which is fixed to one end of the iron core 21, and the other piece is arranged outside the coil 22. The armature 24 is made of a magnetic material and is formed by bending a central portion (hinge portion) 24a into an obtuse L-shape having one piece 24b and the other piece 24c as both pieces.

The electromagnet portion 2 is mounted in a space approximately half that of the base 1, and at that time, the armature 24 has a pair of guide portions 11, 1 whose hinge portion 24a has its outer surface 24d provided on the base 1.
By being guided by one of the guide surfaces 11a, 11a, the inner bent corner portion is rotatably supported by the end portion of the other piece of the yoke 23 in a hinged manner.

More specifically, the pair of guide portions 11 and 11 described above.
As shown in FIG. 2, the base 1 has a thin-walled tongue-like shape and is extended from both directions at substantially the same angle as the bending angle of the hinge portion 24a of the armature 24 and the tips thereof face each other. It is erected on one surface like a bank, and the outer guide surfaces 11a, 11a have a slight clearance and are hinged.
Outer surface 24 located on both sides of 24a and 24c of 24a
Guide d. Then, the pair of guide portions 11, 11
Is formed from a thermoplastic resin material in the shape of a thin tongue, and is connected to one surface of the base 1 at the bottom, but is in a state of being able to bend when an external force in the thickness direction is applied.

The contact portion 3 is composed of a first contact spring 31 and a second contact spring 32, each having a first contact 31a and a second contact 32a at the tip thereof, and the first contact 31a and the second contact 32a face each other. Mounted on the base 1 so that the second contact spring 32
A card 33 for pressing and driving is disposed between the second contact spring 32 and the other piece 24c of the armature 24. Then, the case 4 is fitted on the base 1.

Next, the operation will be described. When voltage is applied to the coil terminal 22b and the coil 22 is excited, the armature 24 becomes
The yoke 23 is pivotally supported by an inward bent corner that is rotatably supported by the other end of the yoke 23, and the one piece 24b is an iron core.
Then, the card 33 driven by the other piece 24c of the armature 24 presses and drives the second contact spring 32 so that the second contact 32a contacts the first contact 31a. Also coil
When 22 is de-excited, the second contact 32a is separated from the first contact 31a by the spring force of the second contact spring 32, and the card 33 is pushed back so that one of the pieces 24 of the armature 24 is opened.
b is released from the iron core 21 and returns to its original state.

In such an electromagnetic relay, the armature 24
Due to variations in the dimensions and assembly accuracy of the base 1 and armature 24, etc., there is no clearance between the outer surface 24d of the hinge part 24a and the guide surfaces 11a, 11a of the guide parts 11, 11 of the base 1. Even if the guide surfaces 11a, 11a come into contact with each other, the guide portions 11, 11 themselves bend due to the external force in the thickness direction, so that the friction against the guide surfaces 11a, 11a does not increase so much and the guide surfaces 11a, 11a smoothly. The bent corner portion on the inner side can be pivoted while being hinge-supported by the end portion of the other piece of the yoke 23.

The armature 24 is composed of both pieces 24 of the hinge portion 24a.
Since the pair of guide portions 11 and 11 are formed on the base 1 so as to guide the b and 24c sides respectively, both the pieces 24b and 24c
The guide surface 11a is formed because the guide surface 11a of the pair of guide portions 11 can be shorter than that in the case where there is only one guide portion. Therefore, the strength of the base 1 molding die is strong.

Next, a second embodiment of the present invention will be described below with reference to FIG. This is different from the first embodiment only in the configuration of the guide portion.

That is, in the first embodiment, the pair of guide portions 11 and 11 are provided, but in the second embodiment, one guide portion 12 is arranged so as to be juxtaposed with the one piece 24b of the armature 24. The tip 24a of the piece 24b projects toward the hinge 24a, and the guide surface 12a of the piece 24b extends outward from the outer surface 24d of the hinge 24a.
The front end portion is formed in a rounded shape at substantially the same angle as the bending angle of the hinge portion 24a so as to follow with a slight clearance.

In such an electromagnetic relay, as in the first embodiment, since the guide portion 12 is bent by receiving an external force in the thickness direction, the armature 24 does not increase friction with the guide surface 12a. In addition to being able to smoothly rotate, the guide portion 12 is arranged in parallel with the one piece 24b of the armature 24, and the tip portion thereof is formed at an angle substantially the same as the bending angle of the hinge portion 24a. One piece 24b and the other piece 24c
Since the outer surface 24d of the hinge portion 24a that straddles both of the two sides has a slight clearance, the guide surface 12a located on one side of the hinge portion 24a guides both operation directions of the one piece 24b and the other piece 24c. The operation of the pole 24 is more stable.

The guide portion 11 and the second portion of the first embodiment
Each of the guide portions 12 of the embodiment is erected on one side of the base 1 like a bank, that is, the bottom is connected to one side of the base 1, but one side of the base 1 and the bottom are separated. If it is formed so that the mold is complicated, only the base end side is connected to one surface of the base 1 and it becomes easier to bend due to external force in the thickness direction, and the armature 24 rotates more smoothly. Can move.

Further, the guide portion 11 and the guide portion 12 are erected on one surface of the base 1 in a thin-walled tongue shape like a bank, and the hinge portion 24a of the armature 24 is provided on the guide surface. The shape is not limited as long as it can be bent when its outer surface comes into contact.

[0025]

According to the first aspect of the present invention, in the armature, there is no clearance existing between the outer surface of the hinge portion and the guide surface of the guide portion of the base due to variations in size and assembling accuracy of each member. Even if it comes into contact with the guide surface, the guide portion itself bends, so that the inner side can be smoothly hinged and pivoted by the yoke without increasing friction against the guide surface. .

According to the second aspect, in addition to the effect of the first aspect, in order to guide the hinge portion of the armature by the guide portion, not one guide portion but both side portions of the hinge portion are respectively provided. Since a pair of guide parts are formed on the base so as to guide, the length of the guide surface of each pair of guide parts may be shorter than that of one guide part, thus forming the guide part. Therefore, the strength of the molding die portion of the base becomes strong.

According to a third aspect of the present invention, in addition to the effect of the first aspect, one piece of the armature that is actuated by being sucked and released by the iron core is moved in the operating direction by the guide portion formed in parallel. Since the armature is guided, the operation of the armature becomes more stable.

According to a fourth aspect of the present invention, in addition to the effect of the third aspect, one and the other of the armature can be provided by the two guide surfaces of the guide portion forming an angle substantially the same as the bending angle of the hinge portion. Since the two operating directions of the one piece are guided, the operation of the armature is further stabilized.

[Brief description of the drawings]

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

FIG. 2 is an enlarged front view of an essential part of the above.

FIG. 3 is an enlarged front view of essential parts showing a second embodiment of the present invention.

FIG. 4 is a front view showing a conventional example.

[Explanation of symbols]

 1 Base 11 Guide part (first embodiment) 11a Guide surface (first embodiment) 12 Guide part (second embodiment) 12a Guide surface (second embodiment) 2 Electromagnet part 21 Iron core 22 Coil 23 Yoke 24 Armature 24a Hinge part 24b One side 24c The other side 24d Outer surface 3 Contact part

Claims (4)

[Claims] 1. A base, and an electromagnet portion and a contact portion mounted on the base, wherein the electromagnet portion includes an iron core, a coil wound around the iron core, and a yoke fixed to the iron core. , An armature that is suction-released by an iron core to drive the contact part to open and close, and the armature is inwardly guided by the hinge part being guided by the guide surface of the guide part having the outer surface as a base. In an electromagnetic relay in which a side is rotatably supported by a yoke, the guide portion of the base is formed so as to bend when the outer surface of the hinge portion of the armature comes into contact with the guide surface. Electromagnetic relay characterized by 2. The armature is formed by bending a central portion serving as the hinge portion into a substantially L-shape having one piece that is sucked and released by the iron core and the other piece that drives the contact portion to open and close as two pieces. The electromagnetic relay according to claim 1, wherein the electromagnetic relay is formed, and a pair of the guide portions are formed to respectively guide both side portions of the hinge portion. 3. The armature is formed by bending a central portion serving as the hinge portion into a substantially L-shape having one piece that is sucked and released by the iron core and the other piece that drives the contact portion to open and close as two pieces. The electromagnetic relay according to claim 1, wherein the electromagnetic relay is formed, and the guide portion is formed in parallel with one piece of the armature. 4. The electromagnetic relay according to claim 3, wherein the guide surface of the guide portion is formed at substantially the same angle as the bending angle of the hinge portion.