JPS6313291B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a rotatably supported armature block 1, a permanent magnet 8 that magnetizes the rotating end of the armature block 1, and an excitation coil 11 that magnetizes the armature block 1 to rotate the armature block 1. A yoke 10 that attracts and repulses the moving end to rotate the armature block 1, a card 2 protruding from both sides of the armature block 1 between the rotating end of the armature block 1 and the center of rotation, and one end. are fixed and arranged in parallel on both sides of the armature block 1 in correspondence with the respective cards 2, and a movable contact spring plate 3 whose substantially central portion is locked to the tip of the card 2;
A movable contact spring plate 3 is disposed opposite to the movable contacts 4 provided on both sides of the armature block 1 at the free end and is pulled in by a card 2 on the opposite rotation direction when the armature block 1 is rotated. makes contact with contact point 4,
A locking groove 9 has a movable contact 4 of a movable contact spring plate 3 that is pushed by the card 2 on the rotation direction side and a fixed contact 5 that opens and releases, and that locks the movable contact spring plate 3 at the tip of the card 2. The present invention relates to a relay in which inner wall surfaces 9a, 9a on both sides of the locking groove 9, which are parallel to the movable contact spring plate 3, are formed by arcuate surfaces protruding in opposite directions.

The present invention relates to a lift type relay that obtains contact pressure by displacement of a movable contact spring plate itself.

As shown in Fig. 1, the conventional lift type relay of this kind, when the armature block 1 rotates,
Movable contact spring plate 3 with the pushing force of the card 2 released
brings the movable contact 4 into contact with the fixed contact 5 by the contact pressure generated by the initial displacement of the spring, while the movable contact spring plate 3 pushed by the card 2 separates the movable contact 4 from the fixed contact 5. It was becoming like that.
However, in such a conventional example, since contact is made only by the displacement of the movable contact spring plate 3 itself, there is almost no wiping force, and even if the contacts were to weld together, it would take the balance armature 1 to separate them. The drawback was that you could only rely on the suction power to rotate it. FIG. 2 shows the spring load curve of the above-mentioned conventional example.

The present invention was made in view of this drawback, and its purpose is to provide a relay that can increase wiping and the amount of wiping, improve welding resistance, and further improve sensitivity. .

The present invention will be explained below with reference to Examples. FIG. 3 shows a schematic top view of an embodiment. The armature block 1 has two magnetic plates 6, 6 extending through a fixed part 7 made of molded parts in parallel, and has a rotating shaft 12 fixed in the center so as to be rotatably supported in the vertical direction as shown in the figure. Two permanent magnets 8, 8 are provided in the fixed portions on both sides of the rotating shaft 12, and the magnetic plates 6, 6 are magnetized to the polarities shown. In the figure, the card 2 is integrally provided on the upper and lower ends of the fixing part 7, respectively. Above and below the armature block 1, movable contact spring plates 3 are arranged parallel to each other so as to correspond to the respective cards 2, and one end of these movable contact spring plates 3 is fixed to a terminal or the like.
A movable contact 4 is provided on the side surface of the armature block 1 at the free end. The card 2 has a locking groove 9 at its tip as shown in FIGS. Convex inner wall surface 9 consisting of
A substantially central portion of the movable contact spring plate 3 is fitted and locked in the narrow portion between a and 9a. The fixed contacts 5 are arranged opposite to the respective movable contacts 4. In the figure, 10 is a yoke, and this yoke 10 is adapted to be excited by an excitation coil 11, and its both ends 10a, 1
0a are inserted into the gaps between the magnetic poles of the magnetic plates 6, 6 at both ends of the armature block 1, respectively.

Now, when a current is applied in a predetermined direction to the excitation coil 11 and the armature block 1 is attracted and rotated as shown in the figure, the card 2 on the rotation direction side pushes the movable contact spring plate 3 and the fixed contact 5 The movable contact 4 is opened. On the other hand, the card 2 on the opposite side with respect to the rotation direction causes the movable contact spring plate 3 to move in conjunction with the movement of the card 2 by the locking groove 9 and is pulled in in the rotation direction. At this stage, when the movable contact 4 contacts the fixed contact 5, contact pressure is obtained by the displacement of the movable contact spring plate 3 itself, and then as the card 2 is further pulled in, the movable contact spring plate 3 is bent in the retraction direction. A shearing force will be generated at the contact portion. FIG. 5 shows the spring load curve of the example.

Since the present invention has a movable contact spring plate configured as described above and a part of which is latched to the tip of the card,
Even after the contact pressure is obtained by the displacement of the movable contact spring plate itself due to the withdrawal of the card when the armature block is rotated, the movable contact spring plate can be further retracted, and the shearing force is applied to the movable contact spring plate. Since the wiping force and amount of wiping can be increased, even if welding occurs at the contact part when switching a large current, the welding will be prevented by the shearing force and the attraction force against the armature block. This has the effect that the welding resistance of the contacts is improved, and when the spring load is taken into account, the final spring force is increased, the suction force at the start of operation is lowered, and the sensitivity is improved. Furthermore, in the present invention, since the card is brought into contact with the approximate center of the movable contact spring plate, the distance between the movable contact and the fixed contact is greater than when the card is brought into contact with the free end side of the movable contact spring plate. This has the advantage that the amount of wiping is much larger, and since the card is provided protruding between the rotating end of the armature block and the center of rotation, the card that is the point of action of the lever is Since it is located inside the rotating end, which is the point of effort, it has the advantage of increasing the driving force of the card.Furthermore, in the present invention, the rotating end of the armature A permanent magnet that magnetizes the armature block, and a yoke that is excited by an excitation coil and attracts and repels the rotating end of the armature block to rotate the armature block.The rotating force of the armature block moves the movable contact spring plate in the opening direction. The contact can be forcibly driven in both the open and close directions, and the return operation of the contact is more reliable than in the case where the contact is returned to the open or close direction only by the elasticity of the movable contact spring plate. The advantage is that it can be done.

[Brief explanation of the drawing]

1 and 2 are diagrams of a conventional example, FIG. 3 is a schematic top view of an embodiment of the present invention, FIGS. This is the same spring load characteristic diagram as above, 1 is the amateur block, 2 is the spring load characteristic diagram.
is a card, 3 is a movable contact spring plate, 4 is a movable contact,
5 is a fixed contact.

Claims (1)

[Claims] 1 A rotatably supported armature block,
A permanent magnet magnetizes the rotating end of the armature block, a yoke that is excited by an excitation coil and attracts and repels the rotating end of the armature block to rotate the armature block, and a yoke that magnetizes the rotating end of the armature block and rotates. A card protrudes from both sides of the armature block between the moving center and one end of the card is fixed and is arranged in parallel on both sides of the armature block corresponding to each card, with the approximately central part engaging the tip of the card. The stopped movable contact spring plate and the movable contacts provided on the sides of the armature block at the free end of the movable contact spring plate are arranged opposite to each other, and when the armature block rotates, the contacts are pulled in by the card on the opposite side of the rotation direction. It has a fixed contact that comes into contact with the movable contact of the movable contact spring plate that is inserted and opens with the movable contact of the movable contact spring plate that is pushed by the card on the rotation direction side, and the movable contact spring plate is attached to the tip of the card. A relay that is provided with a locking groove for locking, and in which inner wall surfaces on both sides of the locking groove that are parallel to the movable contact spring plate are formed with arcuate surfaces that protrude in opposing directions.