JP2646792B2 - Operation display of electromagnetic contactor - Google Patents

Description

The present invention relates to an operation display device of an electromagnetic contactor for starting and stopping a motor or the like.

[Conventional technology]

FIG. 6 shows an example of such a conventional electromagnetic contactor. Here, the electromagnetic contactor includes an opening / closing contact portion 1 and an electromagnet portion 2 and is housed in a case 3. The opening / closing contact portion 1 has a plurality of movable contacts 4a, 4b and the like supported by a movable contact support 5, and faces the fixed contact 6. 7 is a contact spring, 8 is a return spring,
Reference numeral 9 denotes a stopper for supporting the movable contact, and reference numeral 10 denotes an operation display device attached to the movable contact support 5 and protruding from the case 3. The electromagnet section 2 is arranged so that a coil 12 is wound around a fixed iron core 11 to attract the movable iron core 13. The movable core 13 and the movable contact support 5 are connected by a lever 14. An insulating plate is provided between the opening / closing contact portion 1 and the electromagnet portion 2.
15 are arranged.

When the coil 12 is energized, the movable core 13 is attracted to the fixed core 11 and moves rightward in the figure. At this time the lever
The pivot 14 moves the movable contact support 5 to the left against the return spring 8. Therefore, the movable contact 4a of the normally open contact contacts the fixed contact 6, and the movable contact 4b of the normally closed contact is separated from the fixed contact 6. At this time, the display piece of the operation display device 10 protruding from the case 3 retreats to the same plane as the case 3. When the coil 12 is de-energized, the movable contact support 5 and the movable iron core 13 return to the original state by the reaction force of the return spring 8, and the display piece of the operation display device 10 protrudes from the case 3.
In this way, this electromagnetic contactor opens and closes the electric circuit,
The operation is displayed on the operation display device.

[Problems to be solved by the invention]

In the conventional operation display device, since the display piece protrudes from the case, the space is required around the case. In addition, there is a drawback in that it is necessary to assemble while pressing the display piece into the case during assembly, and it is difficult to work. Furthermore, although the configuration of each contact is not the same due to the electromagnetic contactor, this configuration is difficult to distinguish in the appearance after assembly, so the movable contact support is colored, for example. For this reason, the movable contact supports need to be different in color for the different contact configurations, and the management is troublesome.

SUMMARY OF THE INVENTION An object of the present invention is to provide an operation display device of an electromagnetic contactor which does not require a space for a display piece, can easily distinguish the configuration of a contact point, and facilitates assembly.

[Means for solving the problem]

In order to solve the above problems and achieve the object, the present invention provides:
An electromagnet portion and a movable contact support which is arranged to move in parallel with the moving direction of the movable iron core in conjunction with the movable iron core of the electromagnet portion are housed in a case, and electromagnetic contact is made from a display window provided in the case. In the operation display device of the electromagnetic contactor for displaying the ON / OFF state of the device, a mounting portion including a plurality of protrusions is provided at a position corresponding to the display window of the movable contact support, and the mounting portion is provided with the mounting portion. A plurality of display pieces having projections that engage with the projections of the section, and the display pieces are detachably attached to the attachment portion.

(Operation)

The operation display device can be assembled simply by engaging the plurality of projections of the mounting portion provided on the movable contact support with the projections of the display piece. At this time, the display piece distinguishes the difference in the contact configuration based on the number of projections and the shape and color of the display surface. Since the display piece moves right and left together with the movable contact support, the display piece is viewed from a display window provided in the case.

〔Example〕

An embodiment of the present invention is shown in FIGS. 1 to 5, and the same components as those in FIG. 6 are denoted by the same reference numerals as in FIG. In FIG. 1, an electromagnet portion 2 having a movable core 13, a lever 14 for connecting the movable iron core 13 and the movable contact support 5, an insulating plate 15 for insulating between the opening / closing contact portion 1 and the electromagnet portion 2, etc. The description is omitted because it is the same as the conventional one. As shown in FIG. 2, the operation display device of the electromagnetic contactor has a mounting portion 16 provided in a direction perpendicular to the moving direction of the movable contact support 5, that is, on the upper portion of the movable contact support 5. 17 are installed. A display window 3a is provided on a wall surface of the case 3 corresponding to the operation display device 10.

The mounting portion 16 will be described in detail. As shown in FIG. 3, a protrusion 18 is provided on the upper portion of the movable contact support 5 in a direction perpendicular to the moving direction, and the center of the protrusion 18 is perpendicular to the moving direction. A groove 19 is provided on one of the wall surfaces of the groove 19, and two protrusions 20a and 20b are provided in a vertical direction on one wall surface of the groove 19.

As shown in FIGS. 4 (A), 4 (B), and 4 (C), the display piece 17 has various shapes depending on the structure of the contact point attached to the movable contact support 5. As shown in FIG. Of course, it may be color-coded. A display piece 17a shown in FIG. 4 (A) is formed in an L-shape by a display surface 21 and a support surface 22, and the support surface 22 has a protrusion 23 sandwiched between two protrusions 20a and 20b of the mounting portion 16. And mounting part 16
Is provided with a claw 24 to be locked to. The display piece 17b shown in FIG. 4 (B) is formed in an L shape by the display surface 21a and the support surface 22, but the support surface 22 is further provided with a step to display the display surface 21a.
A display surface 21b parallel to the display surface 21a is provided in a direction opposite to the direction a, and the display surface is marked with OFF. The support surface 22 has two protrusions 23a and 23b sandwiching one of the two protrusions 20a and 20b of the mounting portion 16, for example, the protrusion 20a, and a claw 24 locked by the mounting portion 16. Is provided. Fig. 4 (C)
Is formed by a display surface 21 and a support surface 22 into an L-shaped cross section.
a, 20b, three projections 23a, 23b, 23c that mesh with each other, and a claw 24 that is locked to the mounting portion 16 are provided. In such a display piece 17a to 17c, each of the protrusions 23, 23a, 23b, 23c is engaged with each of the protrusions 20a, 20b of the mounting portion 16, and the claw 24 is locked and fixed to the other wall surface of the groove 19. You. In this way, the operation display device 10 is formed inside the electromagnetic contactor case 3 as shown in FIG. 5 (A), and can be viewed from the display window 3a of the case 3. FIG. 5 (B) is an enlarged view of the appearance of the operation display device 10, in which a display piece 17b shown in FIG. 4 (B) is seen through a display window 3a provided in the case 3. This figure shows the closed state of the electromagnetic contactor, and the sign of ON is visually observed on the display surface provided with a step on the case 3 by the movement of the display piece 17b. Here, when the electromagnetic contactor is shut off, the display piece 17b moves rightward in the figure, the ON symbol is covered by the display surface 21a, and conversely, the OFF symbol (not shown) written on the display surface 21b already described. Is made visible. In this display, it is also possible to distinguish between ON and OFF by color-coding the portion of the case 3 indicated as ON and the display surface of the display piece 17b.

〔The invention's effect〕

According to the present invention, since the operation display device is incorporated into the groove of the projection provided on the movable contact support, the display piece of the operation display device does not protrude to the outside, so that the operation display device can be closely attached to other devices. It becomes possible and the assembly work becomes easy. Also, the movable contact support can be made to correspond to the difference of the contact configuration by the type or color coding of the operation display piece as one type, and the determination of the contact configuration can be easily made even after the assembly.

[Brief description of the drawings]

1 to 5 show an embodiment of an operation display device of an electromagnetic contactor according to the present invention. FIG. 1 is a sectional view of the electromagnetic contactor, FIG. FIG. 3 is a perspective view of a mounting portion provided on a movable contact support, and FIG. 4 (A).
FIGS. 5B and 5C are perspective views showing examples of different display pieces, and FIGS. 5A and 5B show the appearance of an electromagnetic contactor.
(A) is a perspective view showing the whole, (B) is an enlarged perspective view of the operation display device, and FIG. 6 is a sectional view of a conventional electromagnetic contactor. 2: Electromagnet part, 3: Case, 3a: Display window, 5: Movable contact support, 10: Operation display device, 13: Movable core 16: Mounting part, 20a, 20
b: Protrusion of the mounting portion, 17, 17a to 17c: Display piece, 23, 23a to 23c: Protrusion of display piece.

Claims (1)

(57) [Claims] An electromagnet portion and a movable contact support arranged to move in parallel with a moving direction of the movable iron core in conjunction with a movable iron core of the electromagnet portion are housed in a case and provided in the case. In the operation display device of the electromagnetic contactor for displaying the on / off state of the electromagnetic contactor from the display window, the movable contactor support includes a mounting portion including a projection having a plurality of projections at positions corresponding to the display window. In addition to providing a plurality of display pieces having projections that engage with the projections of the mounting portion,
The operation display device for an electromagnetic contactor, wherein the display piece is detachably attached to the attachment portion.