JPH0453058B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a driving device for an auxiliary contact added to an electromagnetic contactor, an electromagnetic relay, or the like.

[Conventional technology]

In order to increase the number of contacts in electromagnetic contactors and electromagnetic relays, auxiliary contact blocks are often added to the main body.

In this case, the crossbar provided on the auxiliary contact block is usually coupled to the crossbar provided on the electromagnetic contactor and moves up and down driven by an electromagnet, and as the crossbar of the electromagnetic contactor moves, the auxiliary contact The crossbar of the block is driven to open and close a movable contact piece provided on the crossbar and a fixed contact piece provided on the main body of the auxiliary contact block.

[Problem that the invention seeks to solve]

It is desirable that the above-mentioned auxiliary contact block be made smaller than an electromagnetic contactor or the like, and therefore the stroke of the crossbar must also be made smaller. However, since the crossbar of an electromagnetic contactor, etc. has a large stroke, the stroke of the crossbar of the auxiliary contact block that follows this also becomes large, and as a result, the overall structure of the auxiliary contact block must also become large. .

The present invention has been made to solve the above problems, and is an auxiliary contact that allows the stroke of the crossbar of the auxiliary contact block to be significantly smaller than the stroke of the crossbar of an electromagnetic contactor, etc. The purpose of this invention is to obtain a drive device for the following.

[Means for solving problems]

The auxiliary contact drive device for an electromagnetic contactor or the like according to the present invention has a first crossbar provided in a hole provided in the outer wall of the electromagnetic contactor or the like having a second crossbar, and a hole provided in the second crossbar, respectively. A protrusion is inserted, and a spring is interposed between the protrusion and the second crossbar.

[Effect]

When the second crossbar descends, the first crossbar also descends, and even if the first crossbar comes into contact with the stopper and stops, the second crossbar further descends and moves a predetermined stroke.

〔Example〕

Fig. 1 is a front view of the contact block part shown partially in cross section, and Fig. 2 is a sectional view (corresponding to the A-A cross section in Fig. 1) showing the contact block coupled to the electromagnetic contactor. .

In both figures, 1 is an auxiliary contact block, 2 is its main body, and 3 and 4 are stationary contacts fixed to the main body 2. Reference numeral 5 designates a crossbar (hereinafter referred to as the first crossbar) of an auxiliary contact block that is arranged in the center of the main body 2 so as to be able to slide up and down.
A protrusion 6 is provided that protrudes to the outside from an opening 2a provided on the back of the holder, and movable contact pieces 8 and 9 are provided in square holes 7 extending from side to side.
10 is a spring interposed between the movable contact pieces 8 and 9;
Pressure is applied when the movable contact pieces 8, 9 bridge the fixed contact pieces 3 or 4. 11 is a spring receiver provided on the protrusion 6, and 12 is a stopper provided below the first cross bar 5. In this embodiment, the fixed contact piece 3 is a normally closed contact, the fixed contact piece 4 is a normally open contact, and the stroke of the first crossbar 5 is 1.

Reference numeral 21 denotes an electromagnetic contactor incorporating, for example, a fixed contact piece, a movable part, a movable contact piece provided thereon, an electromagnet, etc. (not shown), and 22 a case thereof. 23 is a crossbar of an electromagnetic contactor (hereinafter referred to as a second crossbar) which is driven up and down by an electromagnet; 24
is a square hole provided in the second cross bar 23, into which the protrusion 6 of the first cross bar 5 is inserted through the window 22a of the case 22, and the spring receiver 1 is inserted into the square hole 24 through the window 22a of the case 22.
A spring 25 is interposed between the square hole 24 and the upper surface of the square hole 24. Note that the stroke of the second cross bar 23 is L.

In the auxiliary contact block as described above, in the initial state, the second crossbar 2 is connected as shown in FIG.
3 is located above, and the protrusion 6 of the first crossbar 5
The movable contact piece 8 is pressed down by the spring 25 and comes into contact with the lower surface of the square hole 24, and the movable contact piece 8 is pressed against the fixed contact piece 3 by the spring 10.
The movable contact piece 9 and the fixed contact piece 4 are separated and opened.

When the second crossbar 23 of the electromagnetic contactor 21 is driven by the electromagnet and lowered, the first crossbar 5 of the auxiliary contact block 1 is also lowered by the spring 25, as shown in FIG. 3, and the movable contact Piece 8 and fixed contact piece 3 open the circuit, and movable contact piece 9 bridges with fixed contact piece 4 to close the circuit. At this time, a slight gap is formed between the lower surface of the first cross bar 5 and the stopper 12.

Subsequently, when the second crossbar 23 descends, the lower surface of the first crossbar 5 abuts against the stopper 12, as shown in FIG. 4, and further descent is prevented. Further, when the second crossbar 23 is lowered, the first crossbar 5 cannot be lowered, so only the second crossbar 23 is lowered by a predetermined stroke L against the spring 25, as shown in FIG. death,
A gap g is formed between the lower surface of the square hole 24 of the second cross bar 23 and the protrusion 6 of the first cross bar 5.

Thus, according to the present invention, the crossbar 5 of the auxiliary contact block 1 can open and close the auxiliary contacts with a stroke l that is much smaller than the stroke L of the crossbar 23 of the electromagnetic contactor 21.

FIG. 6 is a sectional view of another embodiment of the present invention, and FIG. 7 is a BB sectional view thereof. In this embodiment, the structure of the auxiliary contact block 1 is the same as in the first embodiment. 33 is a second cross bar, which has square holes 34, 34 above and below the stoppers 35, 35a.
a, and a passage 36 for the projection 6 of the first crossbar 5 is formed between the stoppers 35, 35a. 37, 37a are movable spring receivers,
Springs 38 and 38a are interposed between the upper and lower surfaces of the square holes 34 and 34a, respectively.

In this embodiment as described above, the first crossbar 5 is initially connected to the spring 38 of the second crossbar 33.
The contact block 1 rises under pressure from the contact point a, and its upper surface abuts against the inner wall of the main body 2 of the auxiliary contact block 1, and remains stationary at that position. At this time, the fixed contact piece 3 and the movable contact piece 8
is closed, and the fixed contact piece 4 and movable contact piece 9 are in an open state.

Now, when the second cross bar 33 is driven by the electromagnet, the second cross bar 33 first hits the spring receiver 37.
moves downward until it comes into contact with the protrusion 6 of the first cross bar 5 (stroke L ₁ at this time). When the second crossbar 33 further descends, the first crossbar 5 descends against the spring 38a, and from then on, the first crossbar 5
It operates in the same way as in the embodiment.

In this embodiment, the second crossbar 33
Since the spring receiver 37 moves down independently without driving the first crossbar 5 until it comes into contact with the protrusion 6, the stroke of the crossbar 5 of the auxiliary contact block 1 can be increased accordingly. can be made even smaller.

In the above description, the present invention is applied to an electromagnetic contactor, but it goes without saying that it can also be used for electromagnetic relays and other electromagnetic switches. Further, although the movable contact piece of the auxiliary contact block has been described as being installed in a square hole provided in the first crossbar, it may be installed in another position.

〔Effect of the invention〕

As is clear from the above description, the present invention involves inserting the protrusion of the first crossbar of the auxiliary contact block into a hole provided in the second crossbar of an electromagnetic contactor, etc., and connecting the protrusion and the hole. By interposing a spring between them, even if the first crossbar stops descending, the second crossbar can descend by a predetermined stroke, so that the first crossbar of the auxiliary contact block Stroke can be shortened by a wide width,
This allows the auxiliary contact block to be made smaller.

[Brief explanation of drawings]

Fig. 1 is a front view of the auxiliary contact block partially shown in cross section, Fig. 2 is a sectional view of an embodiment of the present invention corresponding to the A-A cross section in Fig. 1, and Figs. FIG. 6 is a sectional view of another embodiment of the invention, and FIG. 7 is a BB sectional view thereof. In the figure, 1 is an auxiliary contact block, 3 and 4 are fixed contact pieces, 5 is a first crossbar, 6 is a protrusion, 8 and 9 are movable contact pieces, and 10, 25, 38, 3
8a is a spring, 12, 35, 35a are stoppers,
21 is an electromagnetic contactor, etc., 23, 33 are second crossbars, 24, 34, 34a are square holes, 36 is a passage,
37 and 37a are spring receivers. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. A first crossbar having a fixed contact piece and a movable contact piece on the outer wall of an electromagnetic contactor etc. equipped with a second crossbar driven by an electromagnet; In the device formed by combining an auxiliary contact block with a stopper provided below the bar, a protrusion provided on the first crossbar in a hole provided in the outer wall and the second crossbar, respectively. An auxiliary contact drive device for an electromagnetic contactor or the like, characterized in that a spring is interposed between the protrusion and the second crossbar. 2. An electromagnetic contactor, etc. according to claim 1, characterized in that a spring is interposed between the upper surface of the protrusion of the first cross bar and the upper surface of the hole of the second cross bar. Auxiliary contact drive device. 3. The second crossbar is provided with stoppers facing on both sides of the hole to form a passage for the protrusion, and square holes are formed above and below the stoppers,
2. The auxiliary contact drive device for an electromagnetic contactor or the like according to claim 1, wherein each of the square holes is provided with a spring equipped with a movable spring receiver that comes into contact with the protrusion.