JPS5999632A - Contact spring structure for multipolar electromagnetic relay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a contact spring structure for a multi-pole electromagnetic, one-vague device with double-cut ties.

Fig. 1 shows an exploded perspective view of four conventional multi-pole electromagnetic couplings, in which i11 is a coil lock;
There is an approximately 'r-shaped iron core i3 in the through hole (1a) of the Otsuk (1).
1 is penetrated and inserted to constitute an electromagnet (2). +41f'j
It is a yoke bent in an inverted shape. (5) is an armature block, which is formed by integrally insert-molding the armature block (6) with the movable contact plate (6) into the insulator (5b). The locking protrusions (4b) on both sides of the horizontal end of the yoke (4) are in the locking grooves (5C) on both sides of the upper end of (5a).
The armature (5a) is rotatably supported on the yoke (4), and the armature (5a) is attached to the electromagnet (2).
) is placed opposite to the iron core (3) so as to be suctionable. (7) is -1· on the protrusion (4C) of the yoke (4). This is a coil spring that locks Mk, and locks the other 9 to the protrusion (5d) at the upper center end of the armature (5a) to urge the armature (5a) in the anti-attraction direction. The movable concubine point plate (6) consists of a vertical piece (6a) made of stainless steel spring plate material, and a vertical piece (6a) made of stainless steel spring plate material.
It consists of a horizontal piece (6b) made of a conductive plate such as a thick copper plate whose central part is attached to the lower end of ), and a movable contact (7m) (7b) that is press-fixed on both sides of this horizontal piece (6b). The upper end of the vertical piece (6a) is supported by being inserted into the lower surface of the insulator (5b), and for example, in the case of multiple poles, a plurality of sets are vertically arranged in parallel as shown in the figure. Incidentally, FIG. 2 shows a perspective view of the movable contact plate (6). In addition, in the figure, the movable contact plates (6) on both sides are for normally open use, the center movable contact plate (6) is for normally closed use, and the vertical piece of the movable contact plate (6) for normally closed use is for normally closed use. ) It is bent into a roughly two-letter shape. In the figure, (8) is a coil terminal board, and this terminal board (8) has vertical holes (
10) from above and is fixed, and the lower end is attached to the base (9
) protrudes downward and the upper end is the block (11
The lead wire lK from the end of the coil winding is electrically connected. (l1m) (llb) are a pair of fixed contact plates, and these pairs of fixed contact plates (11@) (llb) F'i are arranged correspondingly to each movable contact plate (6), and stand (9
) are provided with recesses f12) corresponding to each pair of insertion holes for inserting these fixed contact plates (ll@) (llb), and each pair of fixed contacts One plate (111X11b) is inserted from above into the insertion hole of each recess f121, and the lower end is projected below the base (9).

However, coil block t11. After placing the concave surface (131) on the top surface of the base (9) on the vertical wall (9a) of the base (9),
) The protrusion (3a) of the iron core (31) is passed through the hole (9b) of the yoke (4), and the protrusion (8a) of the iron core (31) is passed through the hole (9b) of the yoke (4).
4a) Fix the coil block fil and yoke f4B to the base (9) by inserting and tightening K. After this, attach the armature to the horizontal piece of the yoke (4) as described above. The horizontal pieces (6b) of each hanging movable contact plate (6) are stored in the recesses 021 of the base (9), and each one is ready! IJ concubine point plate (6) bypass contact (71
X7b)k, and are opposed to the fixed contacts (141X14b) provided on each of the pair of fixed contact plates (11m) (llb). Figure 3 shows a perspective view of the assembled structure without the cover (+5) attached. 0111 in the diagram
This is a protrusion for locking the F'1 lever (+5). Furthermore, FIG. 4 shows a perspective view of the armature (5a).

The multi-pole electromagnetic relay configured in this way has two electromagnets (2
) When an excitation current is applied to the coil of the fill block fi+, the armature (5a) is attracted to the chichi core (3) and the movable contact (7a) provided on the horizontal piece (6b) of the point plate (6) ) (7b) is a pair of fixed contact plates (1la) (llb
) to the fixed contacts (14＠) (14b), and open the pair of fixed contact plates (11m) (llbC between the horizontal pieces (6
energization or interruption via b). By the way, such an electromagnetic relay with a so-called double cut structure uses a pair of contacts as described above in order to switch on and off a large capacity load.
P is made large to ensure safety, so if a situation f1 occurs where one of the pair of contacts does not make contact, load control may become impossible. Here, in such a double cut type electromagnetic relay, the movable contact (7a) (
7b) corresponding to the fixed contacts (141) (14b) d
If the is assembled with a slight deviation, the movable contact (71X7b)
There was a risk that the simultaneity of contacting the fixed contacts (14a) and (14b) at the same time would be lost. If this simultaneity is lost, when I/i@ is released at the contact that came into contact later, it will break first. Contact wear due to arcing due to bounce during the pick operation and arcing during return tends to occur only on the same contact, resulting in the uneven wear phenomenon as shown in Figure @6. In this case, the movable contact (7
a) Since a thick conductive plate is used for the horizontal piece (6b) that is provided with (7b), one movable contact (7a) contacts the fixed contact (14a) f'i, but it is worn out on one side. There is a risk that the other movable contact (7b) may not be able to contact the Iri fixed contact (14b), and especially in the case of multi-pole, it may affect the entire movable contact plate 1B+ and cause the movable contact (7aX7b) and the fixed contact (14m) (14b) There was a problem in that a situation where contact could not be made easily occurred.

The present invention has been made in view of the above-mentioned points. Where υ is for a double-cut multipole electromagnetic relay,
Each pair of movable contacts can independently contact the fixed point, which prevents poor contact caused by uneven wear, etc., and prevents situations in which load control is impossible. An object of the present invention is to provide a contact spring structure for a multipolar electromagnetic relay that can reduce costs.

The present invention will be explained below by way of example. FIG. 7 shows a perspective view of the movable contact plate (6) used in the tit embodiment,
The movable contact plate (6) is formed by punching out a piece of conductive spring material into a substantially T-shape, and the upper end of the vertical piece (6a) I/''i is the armature pre-up D shown in the conventional example in Fig. 1. Tsukuffi+
It is inserted and supported in the insulator (5b) in the same way as in the conventional example. A thin notch groove θ is bored from the lower end of the vertical piece (6a) toward the upper end, and the horizontal pieces (6b) that protrude laterally from both sides of the lower end of the vertical piece (6a) are movable. The contacts (lla) (llb) are attached. Therefore, these movable contacts (llj) (llb) lri notch η
It is possible to move independently using the base as a fulcrum by the divided vertical pieces on both sides. In addition, the movable contact plate in the center of Figure 6 (
6) It is for normally closed use, and the vertical piece (63) is bent into an approximately two-shape shape. In addition, Fig. 8 1a) to (C1 are for the movable contact plate (6) for breaking eggs when viewed from the front. , side view, and bottom view are shown, respectively.

The structure of the electromagnetic relay except for the movable contact plate (6) is
e Since it is the same as the conventional example, explanation of its specific configuration will be omitted.

However, in a multi-pole configuration, the movable contact (7a
) (7b) and the fixed contact (1411) (14J) may be misaligned, resulting in loss of synchronicity and uneven wear. Since the divided vertical pieces on both sides of the movable contact (7aX7b) and the tri-notch groove (I7) can be bent independently, each can contact the fixed contacts (14a) and (14b) as shown in Fig. 9. This can prevent the current situation wN in which load control is impossible due to non-contact between one OJ#J contact and the fixed contact in a double-cut contact structure.

The present invention provides a multi-polar electromagnetic relay configured as described above, in which a movable contact plate is formed of a conductive spring material, and a cutout groove is bored from the center of the other end of the movable contact plate toward one end. , crra on both sides of the notch groove at the other end of the movable contact plate.
Since the contacts are provided, each movable contact is provided,
The divided parts divided by the notched grooves can be bent independently, so even if the contact and release of each movable contact and fixed contact is lost and one-sided wear occurs, the movable contact plate will not bend. The pair of movable contacts can independently contact the corresponding fixed contact, thus preventing the situation where load control becomes impossible due to non-contact between one movable contact and the fixed contact, extending the life of the electromagnetic relay. This is especially advantageous in the case of a multipolar type with a large number of movable contact plates, since the movable contacts of each movable contact plate can be contacted and opened independently. Since it can be formed from a conductive spring material, it has the effect of reducing member costs.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of a conventional multi-pole electromagnetic relay, Figure 2 is an exploded perspective view of the movable contact plate of the above, and Figure 8 is a perspective view of the multi-pole electromagnetic relay without the cover attached. , Figure 4 is a perspective view of the armature used in the above, 1g5 Figure 11+
, lb), (C) #-L' The front view, side view, and bottom view of the TfJ moving contact plate used in the same manner as above. Figure @6 is an explanatory diagram of the operation of the same as above, and Figure l@7 is an example of an embodiment of the present invention. A perspective view of the movable contact plate, Figure 8 (aJ, (b), tcI is a front view, side view, and bottom view of the movable contact plate as above, Figure 9 is an explanatory diagram of the operation as above, +211/i electromagnet, +41H3-
(5a) is the armature, (5b) is the insulator, (6
) is a movable contact plate, (7aXyb) I/i movable contact, (
9) is the base % (lla) (llb) is the fixed contact plate, (1
4λ)r14b) #1 fixing point, θ7) is a notched groove. 125 Fig. 2 60 Fig. 3 Fig. 4tA Capital Fig. 6 Fig. 4a Fig. 7 Fig. 8 Fig. 9 b

Claims (1)

[Claims] fi+ One end is attached to the yoke attached to the electromagnet and pivoted so that it can be freely attracted to the electromagnet, and the armature is biased by a spring in the anti-attraction direction, and one end is attached to the insulator attached to the armature. A plurality of movable contact plates are arranged in parallel, and an electromagnet is housed in a base and provided on both sides of the other end of each movable contact plate. l! I.J.
It consists of a plurality of fixed contact plates each having a fixed contact that opens and contacts a movable contact corresponding to each contact, and conducts current between a pair of fixed contact plates corresponding to the movable contacts on both sides of each movable contact plate.
In a multi-polar electromagnetic relay configured to interrupt, a contact plate is formed of a conductive spring material, and a notch groove is bored from the center of the other end of the movable contact plate toward one end, so that the contact plate of the movable w1 contact plate is A contact spring structure for a multipolar electromagnetic relay, characterized in that movable contacts are provided on both sides of the notched groove at the other end.