JPH0664981B2 - Electromagnetic contactor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electromagnetic contactor in which an electromagnet portion is housed in a case divided into two parts, an upper part and a lower part.

(Prior Art) Generally, a case for accommodating the electromagnetic contactor is vertically divided into two parts, an opening / closing mechanism is accommodated in an upper case, and an electromagnet part is accommodated in a lower case. A fixed iron core of the electromagnet portion is fixed to the bottom surface of the lower case, and an electromagnetic coil wound around a bobbin having a collar is attached to the fixed iron core with the surface of the collar arranged in parallel to the bottom surface of the case. The movable iron core facing the fixed iron core is supported by the return spring, and supports the movable contactor through the movable contactor support.When the electromagnetic coil is energized, the movable iron core is attracted to the fixed iron core or released when the energization is cut off. Then, the movable contactor separates from and contacts the fixed contactor attached to the upper case.

(Problems to be Solved by the Invention) There are electromagnetic contactors for alternating current operation and direct current operation, but for small-sized ones, common parts are shared as much as possible to reduce manufacturing cost.

The opening / closing mechanism part housed in the upper case is commonly used. However, in order to obtain the same driving force, the DC electromagnet needs to increase the number of turns of the electromagnetic coil more than the AC electromagnet, so that the winding space becomes larger than that of the AC electromagnet. Therefore, the DC electromagnet also becomes large, and the electromagnetic contactor for DC operation needs to increase the volume of the lower case. If you try to match the bottom area of the lower case with the upper case, the height of the lower case will increase, and the electromagnetic contactor for DC operation will have a higher height than the electromagnetic contactor for AC operation. Of course, there is a problem that the appearance is unsightly. Of course, if the upper case is configured to match the lower case accommodating the electromagnet part for DC operation, and the upper case and the lower case are used for the AC contact electromagnetic contactor with easy-to-handle shape dimensions, the problem will be solved for the time being. In this case, there is a problem in that the volume of the lower case for accommodating the electromagnet portion for alternating current operation becomes unnecessarily large and the cost for the electromagnetic contactor for alternating current operation increases. In particular, since the AC operation electromagnetic contactor is much more manufactured than the DC operation electromagnetic contactor, it is preferable to determine the shape and dimensions based on the AC operation electromagnetic contactor. We must avoid using it as a standard.

Here, an object of the present invention is to provide an electromagnetic contactor in which the upper case of the electromagnetic contactor can be shared for direct current operation and alternating current operation and the lower case can have the same dimensions for direct current operation and alternating current operation. To provide.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention is configured such that a case is divided into an upper case and a lower case, an opening / closing mechanism is housed in the upper case, and an electromagnetic coil is wound. A fixed iron core mounted on a bobbin having a collar is housed in a lower case, and a collar of the bobbin is arranged in parallel with a mating surface of the upper case and the lower case. The lower case is formed so that the mating surface is substantially flush with the height of the upper surface of the collar of the bobbin,
It is characterized in that the upper case and the lower case are also used for AC operation and DC operation.

(Operation) By making the mating surface of the upper case and the lower case the same as the upper surface of the collar of the bobbin, in the case of a magnetic contactor for DC operation, a part is cut out on the side wall of the lower case of the electromagnetic contactor for AC operation. , By using this notch as a space for winding the electromagnetic coil for DC operation, which has a larger volume than the electromagnetic coil for AC operation, the lower case and the upper case can be used as both the AC contact and DC contact electromagnetic contactors. To do.

(Embodiment) FIG. 1 shows an embodiment of an electromagnetic contactor for alternating current according to the present invention. The case that houses this electromagnetic contactor is divided into a lower case 1 and an upper case 2. The E-shaped fixed iron core 3 is fixed to the bottom of the case 1 with its legs facing upward, and the electromagnetic coil 5 wound around the bobbin 4 having the collar 4a is inserted in the center leg of the iron core 3. Therefore, as shown in FIG. 2, the collar 4a is arranged in parallel with the bottom surface of the case 1. The movable iron core 6 is supported by a return spring 7 provided between the movable iron core 6 and the coil 5 and faces the fixed iron core 3. A movable contact support 8 is attached to the movable iron core 6, a window 8a is provided on the upper portion of the movable contact support 8, and a movable contact 9 is inserted into the window 8a. The contact spring 11 held by the spring receiver 10 is pressed against the lower side of the window 8a. A fixed contact 12 facing the movable contact 9 is attached to the upper case 2. The construction of this electromagnetic contactor is almost the same as the conventional one, and the difference from the conventional one is that the mating surface A of the upper and lower cases 1 and 2 is flush with the upper surface of the collar 4a. May be higher.

When the electromagnetic coil 5 is energized, the movable iron core 6 is attracted to the fixed iron core 3 together with the movable contact support 8 and is released by the return spring 7 when the electricity is cut off. In this way, the contacts 9 and 12 can be opened and closed.

FIG. 3 shows an embodiment of an electromagnetic contactor for direct current according to the present invention. The case that houses this electromagnetic contactor is divided into a lower case 1 and an upper case 2 as in the case shown in FIG. The openings in the lower case 1 and the upper case 2 have exactly the same dimensions as those shown in FIG. However, the electromagnet portion provided with the movable iron core 6 of the fixed iron core 3 and the electromagnetic coil 5 is made larger than that shown in FIG. 1 because it is driven by a direct current. That is, the thickness t and the height h of the coil 5 and the interval 1 between the legs of the fixed iron core 3 are increased, and the fixed iron core 3 is increased until almost reaching both side walls of the case 1.
Further, in order to increase the diameter of the coil 5, a cutout 1a is provided in a part of the side wall of the lower case 1 as shown in FIG. For this reason, the mating surface A of both cases 1 and 2 is flush with the upper surface of the collar 4a so that the side wall of the upper case 2 does not prevent the coil 5 from spreading to the outside. Of course, this mating surface A may be higher. The opening / closing mechanism part housed in the upper case 2 is exactly the same as that shown in FIG. 1, and the operation as this electromagnetic contactor is also exactly the same, and therefore its explanation is omitted.

As described above, according to the present invention, the case is divided into the upper case and the lower case, the opening / closing mechanism is housed in the upper case, the electromagnetic coil is wound, and the bobbin has the collar. In the electromagnetic contactor in which the fixed iron core mounted on the lower case is housed in the lower case, and the flange of the bobbin is arranged in parallel with the mating surface of the upper case and the lower case, the mating surface of the upper case and the lower case is Since the lower case is formed so as to be substantially flush with the upper surface of the collar of the bobbin, and the upper case and the lower case are used for both AC operation and DC operation, the side wall of the lower case is Even if a notch is provided and the electromagnetic coil is thickened to this notch, the side wall of the upper case does not interfere with this. Therefore, if a notch is provided in the side wall of the lower case for accommodating the electromagnet part for alternating current operation, the volume for the direct current operation of a larger volume than the electromagnetic coil of the electromagnet part for alternating current operation is provided. The electromagnetic coil of the electromagnet part can be housed, and when manufacturing a DC contactor, the upper case and the opening / closing mechanism part housed in this upper case can be shared with the AC contactor. In addition, since it is not necessary to increase the volume of the lower case of the electromagnetic contactor for AC operation, there is an effect that the cost can be reduced.

[Brief description of drawings]

1 to 4 show an embodiment of an electromagnetic contactor according to the present invention, FIG. 1 is a longitudinal sectional view showing an embodiment of a direct current electromagnetic contactor, and FIG. 2 is an electromagnetic contactor shown in FIG. FIG. 3 is a plan view of the lower case of FIG. 3, FIG. 3 is a longitudinal sectional view showing an embodiment of the AC electromagnetic contactor, and FIG. 4 is a plan view of the lower case of the electromagnetic contactor shown in FIG. 1: Lower case, 2: Upper case, 4: Bobbin, 4a: Bobbin collar, 5: Electromagnetic coil.

Claims (1)

[Claims] 1. A case is divided into an upper case and a lower case, an opening / closing mechanism is housed in the upper case, an electromagnetic coil is wound, and a fixed iron core mounted on a bobbin having a collar is housed in the lower case. In the electromagnetic contactor in which the collar of the bobbin is arranged parallel to the mating surface of the upper case and the lower case, the mating surface of the upper case and the lower case is substantially flush with the height of the upper surface of the collar of the bobbin. An electromagnetic contactor characterized in that a lower case is formed so that the upper case and the lower case are used for alternating current operation and direct current operation.