JPH06103875A - Electromagnetic contactor - Google Patents

Abstract

PURPOSE:To form an electromagnetic contactor in configuration of a plurality of phases wherein the pitch of the terminal wiring parts (including the terminal screw) enlarges when the dimension is enlarged, but the dimension of the case (in particular, the width) is left the same as conventional and use common interior components which have been conventional. CONSTITUTION:In the case the pitch P3 of terminal wiring parts 2U, 2V on the power supply side and the pitch P3 of the terminal wiring parts 2R, 2S on the load side are both greater than the pitch P2 of movable contact pieces 4, the place in connection with the terminal wiring part 2V of a stationary terminal 13 on the power supply side is protruded so that the contact positions of the stationary contact 3D and movable contact 4A are put identical, and this place of protruding is attached to the surface of the terminal wiring part 2V to generate connection. The stationary terminal 23 on the load side is formed inverted for handling to the stationary terminal 13 and attached to the terminal wiring part 2S.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic contactor used for opening and closing an electrical load, and more particularly to a fixed terminal structure thereof.

[0002]

2. Description of the Related Art An electromagnetic contactor of this type is shown in FIGS. FIG. 5 is a plan view of a two-phase electromagnetic contactor, and FIG. 6 is a side view of FIG. On the surface of the case 1, two terminal wiring portions 2U, 2V on the power supply side and two terminal wiring portions 2S, 2R on the load side are provided, and these terminal wiring portions 2U, 2V, 2R, 2S are respectively provided. Fixed terminal 3
Are connected. As shown in the perspective view of FIG. 7, the fixed terminal 3 is formed by bending a flat plate into a Z-shape. A female screw hole 3B is provided at the center of the bent tip portion 3A, and projections 3C are formed on both sides. Are formed. A fixed contact 3D is welded to the tip on the opposite side of the bent portion. As shown in FIGS. 5 and 6, the fixed terminal 3 is connected to the terminal wiring portions 2U, 2V, 2R, 2S by the terminal screw 2A. The fixed terminal 3 itself is fixed by pressing the projection 3C portion into a groove (not shown) provided in the case 1.

The movable contactor 4 bridging the fixed contact 3D at the tip of the fixed terminal 3 on the power supply side and the fixed contact 3D at the tip of the fixed terminal 3 on the load side has movable contacts 4A at both ends, and supports the contactor. It is held at 5. The contactor support 5 is connected to a movable iron core 7 that moves upward due to the excitation of the electromagnetic coil 6. That is, when the electromagnetic coil 6 is excited, the movable iron core 7, the contact support 5 and the movable contact 4 move to move the movable contact 4.
A contacts the fixed contact 3D and the electromagnetic contactor is closed. When the electromagnetic coil 6 is demagnetized, the movable contact 4 is restored to its original state by the action of the coil spring 8, the movable contact 4A is disengaged from the fixed contact 3D, and the electromagnetic contactor is closed.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the touch device, the pitch P of the terminal wiring portions 2U, 2V, 2R, 2S
₁Pitch P between fixed terminals 3 and movable contact 4₂Is the same
It is arranged in one size. Here, for example, increase the current carrying capacity
Therefore, the size of the terminal wiring parts 2U, 2V, 2R, 2S should be adjusted.
If they are made larger, the terminal wiring parts 2U, 2V, 2R, 2
S pitch P₁Has to be increased,
Pitch P between movable contacts 4₂Must also be increased
I won't. In this case, the width W of the case 1 becomes large.
Parts such as the contact support 5 that holds the movable contact 4
It has to be changed and conventional size parts cannot be used. When
This type of electromagnetic contactor has a case depending on its application.
Increasing the width W of 1 is a fatal defect.
There is.

The object of the present invention is to solve the above-mentioned problems.
An object of the present invention is to provide a structure of an electromagnetic contactor, in particular, a fixed terminal thereof, in which the width of the case can be increased to a conventional size without increasing the size of the terminal wiring portion and components such as a contact support can be shared. .

[0006]

According to the present invention, a plurality of fixed terminals on the power supply side and the load side, which are respectively connected to the terminal wiring portions on the power supply side and the load side and have fixed contacts at their tip portions, and the fixed terminals. In an electromagnetic contactor including a fixed contact of each of the terminals and a movable contact of a plurality of phases having movable contacts facing each other, at least one phase of the power supply side and load side terminal wiring portions includes a fixed contact of the fixed terminal. It is arranged at a position displaced from the longitudinal axis.

Further, in such a structure, the fixed terminal connected to the terminal wiring portion arranged at a position deviated from the longitudinal axis including the fixed contact has a linear flat plate and an end of the flat plate. An intermediate portion formed by bending the protruding portion of the flat L-shaped flat plate formed by forming the protruding portion at a right angle to the portion by approximately 90 °, and further bending the intermediate portion outward by approximately 90 ° And a connecting portion for connecting to the terminal wiring portion, and a fixed contact at the other tip of the linear plate. Further, a protrusion is provided on the tip edge portion of the projecting tip portion of the fixed terminal, and a tongue piece formed by cutting and raising the intermediate portion of the fixed terminal is provided on the opposite side of the protrusion.

[0008]

In the structure of the present invention, at least one phase of the power source side and load side terminal wiring portions are arranged at positions displaced from the longitudinal axis including the fixed contact of the fixed terminal, Even if the pitch between the terminal wiring parts expands, the pitch between the movable contactors does not need to match the pitch between the terminal wiring parts and can be set at the conventional pitch, so that parts such as contactor supports can be shared. . Moreover, it is not necessary to increase the width of the case. Moreover, since the fixed terminal is provided with the tongue piece and the protrusion, the fixed terminal can be easily fixed to the case side by press-fitting this portion into the groove inside the case.

[0009]

1 is a plan view showing an embodiment of the present invention, FIG.
3 is a cross-sectional view of the main part of the portion 1 taken along the line BB, FIG. 3 is a cross-sectional view of the main part taken along the line CC of FIG. 1, and the same reference numerals as those in FIGS. . Differs from this embodiment the conventional example, the pitch P ₂ between the movable contact 4 the pitch P ₃ between the pitch P ₃ and the load side of the terminal wiring portion 2R, 2S between power supply side terminal wiring portion 2U, 2V That is, the shapes are made larger (P ₃ > P ₂ ), and the shapes of the fixed terminal 13 on the power supply side and the fixed terminal 23 on the load side on the side where the pitch P ₃ is expanded are changed.

That is, the terminal wiring portions 2U, 2V, 2R,
Increasing the size of 2S and the terminal screw 2A inevitably increases the pitch P ₃ greatly. At this time, if the same fixed terminal 3 as the conventional one is used, the pitch between the movable contactors 4 contacting the fixed terminal 3 also widens and becomes a dimension of P ₃ . If this pitch is widened, conventional parts cannot be used as the parts such as the contact support 5 that holds the movable contact 4. Therefore, the shape of the fixed terminals was changed in order to maintain the pitch between the movable contacts 4 at the conventional P ₂ dimension. That is, the fixed terminal 13 on the power supply side has the shape shown in FIG. This fixed terminal 1
3 is a straight plate, an intermediate portion formed by bending the protruding portion of the flat L-shaped flat plate formed by forming a protruding portion at a right angle at the end portion of the flat plate by approximately 90 °, and And an extension tip portion 13A formed by bending the intermediate portion toward the outside by about 90 °, and a connection portion 13B for connecting with a terminal wiring portion is provided on the extension tip portion and the other end of the linear flat plate. The portion is provided with a fixed contact 13D. When connecting the fixed terminal 13 to the terminal wiring portion 2V, the tongue piece 13E and the protrusion 13C provided on the projecting tip portion 13A are respectively inserted into the grooves 9B and 9C (FIG. 3) provided on the case 1 to fix the fixed terminal 13 Is fixed, and the terminal screw 2A is tightened.

Next, the fixed terminal 23 on the load side is shown in FIG. 4B and has a shape different from that of the fixed terminal 13 described above. That is, the protruding tip portion 23A protruding outward is provided at a portion connected to the terminal wiring portion 2S. A female screw hole 23B is provided at the center of the projecting tip portion 23A, and a projection 2 is provided at the tip.
3C was provided, and the tongue piece 13E was provided on the opposite side. The connection of the fixed terminal 23 to the terminal wiring portion 2R is the same as in the case of the power source side described above, and thus the description thereof will be omitted.

The fixed terminals connected to the terminal wiring portion 2U on the power source side and the terminal wiring portion 2R on the load side are the same as those of the conventional fixed terminal 3 shown in FIG. 7, and their shapes have been described above. Is omitted. When connecting the fixed terminal 3 to the terminal wiring portion 2U, as shown in FIG. 3, the protrusions 3C provided on both sides of the bent tip portion 3A are respectively inserted into the grooves 9A provided in the case 1 to fix the fixed terminal 3A. Fix 3 and tighten terminal screw 2A. Further, the fixed terminal 3 is connected to the terminal wiring portion 2
Since the connection to R is exactly the same, the description is omitted.

The three types of fixed terminals 3, 13, 23 are described above.
Fixed terminal wiring parts 2U, 2V, 2R, 2S
If so, the pitch P between the terminal wiring portions 2U and 2V on the power supply side₃But
Conventional pitch P₁(See Fig. 5)
Between fixed terminals 3 and 13 on the load side and fixed terminals on the load side
The pitch between 3 and 23 is the pitch P between the movable contacts 4.
₂Since it matches the above, parts such as the conventional contactor support 5 are used.
Therefore, the width W of the case 1 is the same as the conventional one.
There is no need to increase it.

In the above embodiment, the example of the magnetic contactor having a single pole, that is, a two-phase structure has been described. However, the present invention is not limited to the configuration as described above, and may be, for example, 3
It can also be applied to a phase structure. In this case, it is smart in terms of its structure to arrange the fixed terminals by using those having a conventional structure for the center terminal and those having protruding ends on opposite sides for both sides.

[0015]

According to the present invention, when the pitch between the terminal wiring portions on the power source side and the pitch between the terminal wiring portions on the load side are respectively expanded, the power source side connected to the expanded terminal wiring portion is connected. The fixed terminal on the load side and the fixed terminal on the load side are formed with an internal threaded hole at the center of the overhanging tip that allows the pitch between the fixed terminals to match the pitch between the conventional movable contacts. Parts such as contact support can be used and can be shared. In addition, the internal space can be used effectively and it is not necessary to increase the size of the case.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view of a main part taken along the line AA of FIG.

FIG. 3 is a cross-sectional view taken along the line CC of FIG.

FIG. 4 is a perspective view of a fixed terminal used in the embodiment of the present invention, (A) is a perspective view of the fixed terminal used on the power source side,
(B) is a perspective view of a fixed terminal used on the load side.

FIG. 5 is a plan view of a conventional electromagnetic contactor.

6 is a side view of FIG.

FIG. 7 is a perspective view of a conventional fixed terminal.

[Explanation of symbols]

 1 Case 2R Terminal wiring part on load side 2S Terminal wiring part on load side 2U Terminal wiring part on power supply side 2V Terminal wiring part on power supply side 3 Fixed terminal 4 Movable contactor 9A groove 9B groove 9C groove 13 Fixed terminal on power supply side 13A Overhanging tip portion 13C Protrusion 13E Tongue piece 23 Fixed terminal on the load side 23A Overhanging tip portion 23C Protrusion 23E Tongue piece

Claims (3)

[Claims] 1. A plurality of phases of fixed terminals on the power supply side and the load side, which are respectively connected to the terminal wiring portions on the power supply side and the load side and have fixed contacts at their tips, respectively, and the respective fixed contacts of these fixed terminals are opposed to each other. In a magnetic contactor including a plurality of movable contacts having a movable contact, the terminal wiring portions of at least one phase on the power supply side and the load side are displaced from the longitudinal axis including the fixed contact of the fixed terminal. An electromagnetic contactor characterized in that the electromagnetic contactor is arranged at a different position. 2. A fixed terminal connected to a terminal wiring portion arranged at a position displaced from a longitudinal axis including a fixed contact, wherein the fixed terminal is a linear flat plate. A plane L formed by forming an overhanging portion at a right angle on the end of a flat plate
An intermediate portion formed by bending the protruding portion of the character-shaped flat plate by approximately 90 °, and an overhanging tip portion formed by bending the intermediate portion outwardly by approximately 90 ° are provided. An electromagnetic contactor, characterized in that a connecting portion for connecting to a terminal wiring portion is provided at a portion, and a fixed contact is provided at the other end portion of the linear flat plate. 3. The projection according to claim 2, wherein a protrusion is provided on the tip edge portion of the projecting tip of the fixed terminal, and a tongue piece formed by cutting and raising the intermediate portion of the fixed terminal is provided on the opposite side of the projection. An electromagnetic contactor characterized in that