JPH065182A - Electromagnetic contactor - Google Patents

Abstract

PURPOSE:To provide an electromagnetic contactor, of which fixed iron core is hard to spring up. CONSTITUTION:A housing of an electromagnetic contactor consists of a body 10, which has the bottom part 11 and the side parts 12 and the opening surface, and a frame 20, which is installed so as to seal the opening surface of the body 10 and which has a support body 30 held freely to move toward the bottom part under the condition that the frame 20 is installed. The electromagnetic contactor has an E-shape fixed iron core 40, which consists of three leg pieces 41, 42, 43 and a continuously provided piece 44 and which is held by the bottom part at this continuously provided piece 44 part, and a movable iron core 50, which is held by a support body of a frame freely to contact and separate with/from the tips of the leg pieces of the fixed iron core 40. Projecting pieces 45, which project in the longitudinal direction of the continuously provided piece 44, are provided in the outer surfaces of both ends of the leg pieces, and support parts 13 for supporting the projecting pieces 45 are provided in the body 10. Furthermore, the projecting pieces 45 are desirably provided at positions upper than the tips of the leg parts, which contact and separate with/ from the movable iron core 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic contactor, and more particularly to an electromagnet device used in the electromagnetic contactor.

[0002]

2. Description of the Related Art As an electromagnet device used in a conventional electromagnetic contactor, there is one having a structure shown in FIGS.

That is, the housing of this type of electromagnetic contactor is composed of an upper opening body 10 and a frame 20 for closing the opening surface of the body 10, as shown in FIG. The body 10 is composed of a bottom portion 11 and side portions 12, and the bottom portion 11 is provided with a holding piece 14 for holding and holding a fixed iron core, which will be described later. The frame 20 is composed of an upper body 21 having a contact opening / closing portion 23 therein and a lower body 22 having a support body 30. The contact opening / closing part 23 has a fixed contact 24 having a fixed contact 25 attached to the upper body 21 and a movable contact 27 having movable contacts 27 facing the fixed contact 25 at both ends.
26 and a movable frame 29 provided with a contact pressure spring 28 for mounting the movable contact 26 and biasing the movable contact 26 toward the fixed contact 24 side. Connected to. The support body 30 is attached to the bottom 11 of the body 10 by means of a return spring 32.
A movable iron core, which will be described later, is held by a pin 31.

A fixed iron core 40 is formed in an E shape from three leg pieces 41, 42, 43 and a connecting piece 44 in which the leg pieces 41, 42, 43 are connected in series. It is held by the body 10 by being sandwiched by the sandwiching pieces 14 of the bottom portion 11.

Reference numeral 50 denotes a movable iron core, and leg pieces 41, 4 of the fixed iron core 40.
Having leg pieces 51, 52, 53 facing 2, 43, and leg piece 5
It is configured in an E shape from a continuous piece 54 in which 1, 52, 53 are arranged in series, so that the leg pieces 51, 52, 53 can come into contact with and separate from the leg pieces 41, 42, 43 of the fixed iron core 40. It is arranged. The continuous piece 54 of the movable iron core 50 is held on the support 30 by the pin 31.

Reference numeral 60 denotes a drive coil, which is arranged so as to be wound around the leg piece 42 at the center of the fixed iron core 40.

Next, a method of opening / closing the contact opening / closing portion 23 will be described. FIG. 9 shows a state in which no current flows through the drive coil 60, and the movable iron core 50 is held at a position apart from the fixed iron core 40. At this time, the movable contact 27
Away from. In this state, when a current is passed through the drive coil 60, the fixed iron core 40 is excited and the leg pieces 51, 52, 52 of the movable iron core 50,
53 is attracted to the leg pieces 41, 42, 43 of the fixed iron core 40. At this time, the movable contact 27 is in contact with the fixed contact 25. And
When the current flowing through the drive coil 60 is cut off, the fixed iron core
The movable iron core 50 adsorbed to the 40 is held at a position separated from the fixed iron core 40 by the return spring 32, and the movable contact 27 is fixed by the return spring 32 and the contact pressure spring 28.
Get away from.

[0008]

In the electromagnetic contactor described above, a fixed iron core connecting piece formed in an E shape from three leg pieces and a connecting piece connecting the leg pieces is formed on the bottom plate. Since it is held on the bottom plate of the body by being sandwiched between the sandwiching pieces,
In the above, when the movable iron core was attracted to the fixed iron core from the obliquely upper right direction, the fixed iron core jumped up in the direction of arrow D in FIG. 12, and the leg pieces of the fixed iron core were sometimes damaged.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an electromagnetic contactor in which a fixed iron core is unlikely to jump up.

[0010]

An electromagnetic contactor according to claim 1 is equipped with a box-shaped body having a bottom portion and side portions and one surface of which is open, and an opening surface of the body. And a frame having a support body that is movably held toward the bottom in the state of being equipped, forms a housing, and E is composed of three leg pieces and a connecting piece that connects these leg pieces. Electromagnetic having a fixed iron core having a letter-shaped continuous piece held at the bottom and a movable iron core held by a frame support so as to be able to come in contact with and separate from the tip of the leg of the fixed iron core. In the contactor, a protruding piece in the longitudinal direction of the continuous piece is provided on the outer surface of each end of the leg piece, and a supporting portion for supporting the protruding piece is provided on the body, and a cushioning member is provided between the protruding piece and the supporting portion. It has a different structure.

According to a second aspect of the present invention, there is provided an electromagnetic contactor, wherein the projecting piece of the first aspect is provided above a tip of a leg piece which comes into contact with and separates from a movable iron core.

[0012]

According to the structure of the first aspect, the protruding pieces in the longitudinal direction of the continuous piece are provided on the outer surfaces of both ends of the leg pieces of the fixed iron core, and the body is provided with the support portions for supporting the protruding pieces, and the protruding pieces. Since the cushioning member is provided between the support and the support portion, the impact force when the movable iron core is attracted can be absorbed outside the attraction surface.

According to the second aspect of the present invention, in the first aspect, since the protruding piece is provided above the tip of the leg piece that comes into contact with and separates from the movable iron core, the impact force of the movable iron core is exerted in addition to the above action. Can be absorbed above the adsorption surface.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The members having the same basic functions as those of the conventional example are designated by the same reference numerals.

That is, the housing of this type of electromagnetic contactor is composed of an upper opening body 10 and a frame 20 for closing the opening surface of the body 10, as shown in FIG. The body 10 is composed of a bottom portion 11 and side portions 12, and a support portion 13 for supporting a fixed iron core, which will be described later, is provided on the bottom portion 11.
Is provided. The frame 20 has a contact opening / closing part 23 inside.
It is composed of an upper main body 21 having the above and a lower main body 22 having the supporting body 30. The contact opening / closing part 23 includes a fixed contact 24 having a fixed contact 25 attached to the upper body 21 and the fixed contact 25.
A movable contact 26 having movable contacts 27 facing each other at both ends, and the movable contact 26 is mounted to attach the movable contact 26 to the fixed contact 24.
The movable frame 29 is provided with a contact pressure spring 28 that is biased toward the side, and the movable frame 29 is connected to the support body 30. The support body 30 is movably held by a return spring 31 in a direction toward the bottom portion 11 of the body 10, and a movable iron core, which will be described later, is attached to the pin 32.
Holding by.

Reference numeral 40 denotes a fixed iron core, which is formed in an E shape from three leg pieces 41, 42, 43 and a connecting piece 44 in which the leg pieces 41, 42, 43 are connected in series, and legs at both ends. Pieces connected to the outer surface of the pieces 41, 43
There are 44 longitudinal projecting pieces 45, 45. This protruding piece
Since 45, 45 are supported by the support portion 13 of the bottom plate 11,
Held on the body 10.

Reference numeral 50 denotes a movable iron core, and leg pieces 41, 4 of the fixed iron core 40.
Having leg pieces 51, 52, 53 facing 2, 43, and leg piece 5
It is formed in an E shape from the continuous piece 54 in which 1, 52, 53 are arranged in series, and the leg pieces 51, 52, 53 can be brought into contact with and separated from the leg pieces 41, 42, 43 of the fixed iron core 40. It is arranged. The continuous piece 54 of the movable iron core 50 is held on the support 30 by the pin 32.

Reference numeral 60 denotes a drive coil, which is arranged so as to be wound around the leg piece 42 at the center of the fixed iron core 40.

Reference numeral 70 denotes a cushioning member, which is formed of an elastic metal in a curved shape and is provided between the projecting piece 45 and the supporting portion 13.

Next, a method of opening / closing the contact opening / closing portion 23 will be described. FIG. 1 shows a state in which no current flows through the drive coil 60, and the movable iron core 50 is held at a position away from the fixed iron core 40. At this time, the movable contact 27
Away from. In this state, when a current is passed through the drive coil 60, the fixed iron core 40 is excited and the leg pieces 51, 52, 5 of the movable iron core 50 are excited.
3 is attracted to the leg pieces 41, 42, 43 of the fixed iron core 40. At this time, the movable contact 27 is in contact with the fixed contact 25. And
When the current flowing through the drive coil 60 is cut off, the fixed iron core
The movable iron core 50 adsorbed by 40 is held at a position separated from the fixed iron core 40 by the return spring 31, and the movable contact 27 is separated from the fixed contact 25 by the return spring 31 and the contact pressure spring 28.

Next, the case where the movable iron core 50 is attracted from the diagonally upper right direction in FIG. 1 will be described. In this case, as shown in FIG. 4, the movable iron core is attached to the leg piece 43 of the fixed iron core 40.
The leg piece 53 of 50 abuts and the leg piece 41 of the fixed iron core 40 tries to jump up in the direction of the arrow A, but by the protruding piece 45 provided in the longitudinal direction of the continuous piece 44 from the outer surface of the leg piece 43. Since the impact force is absorbed, the leg pieces 41 are unlikely to jump up.

According to this embodiment, as long as the protruding piece is provided on the outer surface of both ends of the leg piece so as to be in the longitudinal direction of the continuous piece of the fixed iron core, the protruding piece can be applied anywhere. it can.

Next, a second embodiment will be described with reference to FIGS. The difference from the first embodiment is that the protruding piece 45 is provided above the tips of the leg pieces 41, 42, 43 that come into contact with and separate from the movable iron core 50, and that the support portion 13 is provided above the first embodiment. That is.

Thus, in FIG. 6, when the movable iron core 50 is attracted to the fixed iron core 40 from the diagonally upper right direction, as shown in FIG. When contacting the tip of the leg piece 43 of the fixed iron core 40 provided on the lower side, the protruding piece 45 tries to move in the direction of arrow B. As a result, the tip ends of the leg pieces 43 of the fixed iron core 40, which are continuously provided on the lower side of the projecting pieces 45, move in the direction of arrow C, and follow the tip ends of the leg pieces 53 of the movable iron core 50.

According to the first and second embodiments, the support portion is provided on the bottom plate of the body, but it may be provided anywhere inside the body. Further, according to the first and second embodiments, the cushioning member is formed of a metal having elasticity in a curved shape, but any cushioning member can be applied.

[0026]

According to the first aspect of the present invention, the protruding pieces in the longitudinal direction of the continuous piece are provided on the outer surfaces of both ends of the leg pieces of the fixed iron core, and the body is provided with the supporting portions for supporting the protruding pieces. Since the cushioning member is provided between the projecting piece and the support portion, the attraction force when the movable iron core is attracted can be absorbed outside the attraction surface, and the fixed iron core is less likely to jump up.

According to the second aspect of the present invention, in the first aspect, since the protruding piece is provided above the tip of the leg piece that comes into contact with and separates from the movable iron core, the attraction force of the movable iron core is obtained in addition to the above effect. Can be absorbed above the adsorption surface, and the fixed iron core follows the movable iron core.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of the present invention.

2 is a cross-sectional view of FIG.

FIG. 3 is an exploded perspective view of FIG.

FIG. 4 is an explanatory view showing a state where the movable iron core of FIG. 1 is obliquely adsorbed to a fixed iron core.

FIG. 5 is a vertical cross-sectional view showing a second embodiment of the present invention.

6 is a cross-sectional view of FIG.

FIG. 7 is an exploded perspective view of FIG.

FIG. 8 is an explanatory view showing a state where the movable iron core of FIG. 6 is obliquely adsorbed to a fixed iron core.

FIG. 9 is a vertical sectional view showing a conventional example.

10 is a cross-sectional view of FIG.

FIG. 11 is an exploded perspective view of FIG.

FIG. 12 is an explanatory diagram showing a state in which the electromagnet device of FIG. 9 is attracted obliquely.

[Explanation of symbols] 10 Body 11 Bottom 12 Side 20 Frame 30 Support 40 Fixed iron core 41 Fixed iron core leg piece 42 Fixed iron core leg piece 43 Fixed iron core leg piece 44 Coupling piece 45 Projection piece 50 Movable iron core 70 cushioning member

Claims (2)

[Claims] 1. A box-shaped body having a bottom portion and a side portion, one surface of which is open, and a body which is equipped so as to close the opening surface of the body and which faces the bottom portion in the equipped state. A housing having a support body that is movably held is formed into a housing, and an E-shape is formed by three leg pieces and a connecting piece that connects the leg pieces, and the connecting piece is held at the bottom. An electromagnetic contactor having a fixed iron core and a movable iron core held by a frame support so that the fixed iron core can be brought into contact with and separated from the tip of the leg piece of the fixed iron core. An electromagnetic contactor, characterized in that each of the longitudinally protruding pieces of the piece is provided with a supporting portion for supporting the protruding piece on the body, and a buffer member is provided between the protruding piece and the supporting portion. 2. The electromagnetic contactor according to claim 1, wherein the protruding piece is provided above a tip of a leg piece that comes in contact with and separates from the movable iron core.