JP2001167680A - Apparatus of attaching part of electromagnetic contactor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic contactor with the coil terminal connection part attached to its outside that alleviates the vibration of the part caused by the impact accompanying the switching operation. SOLUTION: The side surface of the electromagnetic contactor 3 is provided with a hollow portion 9 having a protruding portion 9a into an inner wall opposed to it. It receives parts 1 by pressing and contacting the protruding portion 9a into the hollow portion and connects a connection terminal 5 protruding into the inner of parts 1 to a coil terminal 4 of the electromagnetic contactor by firmly tightening with a screw 10. A wall within the hollow portion 9 surrounds the parts 1. The protruding portion 9a is pressed and contacted, and held. Because of inserting the connection terminal 5 between both sides on the protruding portion and fixed it to the coil terminal 4, it can suppress vibration caused by impact and does not loosen the connection terminal 5 or shorten the mechanical life.

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 apparatus for connecting an accessory having a surge suppression element and an operation indicator light added as an additional function to a coil terminal of the electromagnetic contactor.

[0002]

2. Description of the Related Art It is desirable that the above-mentioned accessories be externally attached so that they can be easily attached and detached even after the electromagnetic contactor is installed in a panel. The one described in JP-A-6595 is known. This is because an elastic projection is provided on the accessory case, this elastic projection is engaged with the engaging part provided below the coil terminal of the electromagnetic contactor, and the connection terminal projecting from the upper part is connected to the coil terminal. The accessory is attached to the electromagnetic contactor by screw connection.

[0003]

However, this conventional structure has the following problems. (1) Accessories that have the elastic protrusion of the accessory case engaged with the electromagnetic contactor vibrate around the elastic protrusion by the impact generated each time the electromagnetic contactor operates, so they are connected to the coil terminals. A load is applied to the connection terminal, and the connection terminal is easily loosened and its mechanical life is shortened. (2) Since the accessories protrude out of the magnetic contactor, the outer shape of the electromagnetic contactor is correspondingly larger, and the installation space for the magnetic contactor is increased by mounting the accessories. The present invention addresses such a problem and improves the connection reliability of accessories to coil terminals of an electromagnetic contactor,
It is another object of the present invention to suppress an increase in the outer shape of the electromagnetic contactor due to attachment of accessories.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an electromagnetic electromagnetic device in which a pair of coil terminals are provided on a side surface of a case and accessories are screw-connected to the coil terminals via connection terminals. In the contactor, a recess corresponding to the outer shape of the accessory is provided near the coil terminal on the side surface of the case, and the accessory connected to the coil terminal is stored in the recess.
1). According to such a means, since the accessory is stored in the recess and is surrounded, the vibration due to the impact from the electromagnetic contactor is suppressed, and the load on the connection terminal is reduced.
Further, since the accessories are accommodated in the recess and do not protrude outside, the installation space for the electromagnetic contactor does not increase.

It is preferable that the recess is provided between the coil terminals, and connection terminals of the accessory project toward both sides of the accessory toward the coil terminal. Thereby, the accessory housed in the concave portion is firmly fixed because it is gripped by the coil terminal via the connection terminal from both sides thereof. Further, it is preferable to integrally form a projection for pressing against the accessory on two opposing inner wall surfaces of the recess, thereby holding the accessory tightly in the recess via the projection and further suppressing vibration. (Claim 3).

[0006]

1 and 2 show an embodiment of the present invention. FIG. 1 is a perspective view of an electromagnetic contactor and accessories externally attached thereto, and FIG. It is a perspective view of the state where goods were attached to the electromagnetic contactor. In FIG.
The accessory 1 includes a cubic unit case 2 having a surge suppressor and an operation indicator built therein, and a pair of connection terminals 5 connected to the coil terminal 4 of the electromagnetic contactor 3 so as to protrude from both left and right sides thereof. Is provided.

The electromagnetic contactor 3 is a well-known type in which an open / close contact and an operation electromagnet are accommodated in a molded case 6, and main terminals 7 and 8 are provided before and after, respectively.
A pair of left and right coil terminals 4 is arranged below the bottom. Further, a concave portion 9 corresponding to the outer shape of the accessory 1 is provided between the coil terminals 4 and 4. The concave portion 9 is a cubic space having substantially the same width and front and rear dimensions as the unit case 2 and a slightly smaller height dimension than the unit case 2, and the side surfaces and the bottom surface side of the mold case 6 are open. In the recess 9, one protruding ridge 9 having a triangular cross section is provided on opposing left and right inner wall surfaces.
a are integrally formed facing each other.

In such a configuration, the accessory 1 is shown in FIG.
Is inserted into the concave portion 9 along the direction of the arrow until it contacts the bottom. At the same time, the fork-shaped tip of the connection terminal 6 is inserted between the coil terminal 4 and the terminal screw 10. At this time, the ridge 9a in the recess 9 is pressed against the side surface of the accessory 1 while the edge of the tip is crushed. Thereafter, the connection terminal 5 is fastened to the coil terminal 4 by the terminal screw 10, and the electrical connection of the accessory 1 and the mechanical fixing are performed. FIG. 2 shows a state in which the accessory 1 is attached to the electromagnetic contactor 3 in this manner. In this state, the accessory 1 slightly projects laterally (upward in FIG. Is accessory 1
It becomes a gripping fee when attaching and detaching.

In FIG. 2, the accessory 1 attached to the electromagnetic contactor 3 is housed in the recess 9 and is surrounded, so that the vibration is suppressed even if an impact is applied when the electromagnetic contactor 3 is opened and closed. . In addition, in the illustrated embodiment, the accessory 1 is gripped from both sides by the pressing of the ridge 9a (FIG. 1), so that the holding in the recess 9 is even tighter. , 4 and the accessory 1 housed in the recess 9 is held by the coil terminal 4 via the connection terminals 5, 5 from both sides thereof. The fixation becomes stronger as compared with the projecting one.

[0010]

As described above, according to the present invention, the accessories are stored in the recesses on the side surfaces of the electromagnetic contactor, thereby suppressing the vibration of the accessories and preventing the connection terminals from being loosened and the mechanical life from being shortened. In addition to the above, it is possible to prevent the installation space of the electromagnetic contactor from being increased by attaching accessories. Also, in this case, the recess is provided between the coil terminals of the electromagnetic contactor, the connection terminals protruding from both sides of the accessory are fastened to the coil terminal, and a projection is provided on the inner wall surface of the recess to press the accessory into pressure. By doing so, the attachment can be firmly fixed and vibration can be more effectively suppressed.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electromagnetic contactor showing an embodiment of the present invention and accessories attached thereto.

FIG. 2 is a perspective view showing a state in which the accessory of FIG. 1 is attached to an electromagnetic contactor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Accessory 2 Unit case 3 Magnetic contactor 4 Coil terminal 5 Connection terminal 6 Mold case 9 Depression 9a Projection 10 Terminal screw

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hiroto Hirota 1-1-1 Tanabe Shinda, Kawasaki-ku, Kawasaki-shi, Kanagawa F-term in Fuji Electric Co., Ltd. (reference) 4E353 AA06 AA07 BB01 CC01 CC12 CC18 DD02 DD05 DD08 DR08 DR27 DR32 GG13

Claims (3)

[Claims] 1. An electromagnetic contactor having a pair of coil terminals on a side surface of a case, and an accessory connected to the coil terminal via a connection terminal, wherein the coil terminal is provided on a side surface of the case near the coil terminal. An accessory mounting device for an electromagnetic contactor, characterized in that a concave portion corresponding to the external shape of the accessory is provided, and the accessory connected to the coil terminal is stored in the concave portion. 2. The electromagnetic device according to claim 1, wherein the recess is provided between the coil terminals, and connection terminals of the accessory project toward both sides of the accessory toward the coil terminal. Accessory mounting device for contactor. 3. The accessory mounting device for an electromagnetic contactor according to claim 1, wherein projections for pressing against said accessory are integrally formed on two opposing inner wall surfaces of said recess.