JPS643160Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a relay that turns on and off contacts using a card.

A conventional example is shown in FIG. That is, the contact spring 1, which is biased in the direction of pushing down the card 6', is brought into elastic contact with the tip of the U-shaped card 6', and the engaging protrusion 8 of the card 6' is pushed upward by the armature 10 of the electromagnet 9. As a result, the contact spring 1 and the fixed contact 5 are brought into elastic contact to switch the contact 5. However, in the conventional example described above, when the pressing force of the contact spring 1 becomes unbalanced, the card 6' tends as shown by the dotted line, and friction occurs between the card 6' and the guide groove 11. However, the disadvantage was that the contact pressure changed and the characteristics deteriorated. In view of the above points, it is an object of the present invention to provide a relay whose card is driven regardless of the pressing force of the contact spring and whose characteristics are stable.

The present invention will be explained in detail based on illustrated embodiments. That is, the two contact springs 1 are planted on the base 12 substantially in a straight line with the fixed ends 2 facing outside and the free ends 3 facing each other. Since this relay is used in high frequency circuits, the contact spring 1 is made into a rod shape.
On the upper side of both contact springs 1, the contacts 5 of the common terminal 4 are arranged to face each other, and on the lower side, a substantially U-shaped contact drive card 6 whose center is pivoted about a shaft 13 is arranged. ing. Further, the contact spring 1 is biased to open the contact 5 by torsion,
They are in elastic contact with the tips of both legs 7 of the card 6, respectively. Furthermore, the card 6 is biased by a spring so as to rotate clockwise, and this spring force is set to be larger than the biasing force of the contact spring 1. An engaging protrusion 8 is provided on one leg 7 of the card 6 toward the rear, and this engaging protrusion 8 engages with an armature 10 of an electromagnet 9 disposed at the rear of the base 12. ing. When the coil 14 is energized, the armature 10 is attracted to the electromagnet 9 as shown in FIG. 2, and the card 6 is rotated counterclockwise against the rotational force of the card 6. 7 brings the free end 3 of the contact spring 1 into contact with the contact 5 of the common terminal 4. At this time, the other contact spring 1 is brought into elastic contact with the ground terminal 15 by its own biasing force, thereby improving the high frequency characteristics. Next, coil 1
4, the card 6 rotates clockwise by its own rotational force, bringing the other contact spring 1 into elastic contact with the contact 5 of the common terminal 4, and both contact springs 1
are driven alternately to switch the contact 5.

Thus, in the present invention, two contact springs are arranged approximately in a straight line, and a common terminal contact is placed on one side of both contact springs, and a contact driving card whose center is pivoted is placed on the other side. The contact points are driven alternately at the tips of both legs of the card, and the armature of the electromagnet is engaged with the engaging protrusion of the card to resist the spring force that urges the card in one rotation direction. Since the card is rotationally driven, the card is pivoted at the center, so even if the pressing force of the contact spring becomes unbalanced, friction may occur between the guide groove and the contact pressure may change. The characteristics are stable without causing any damage. Furthermore, since the card rotates around the pivot, the card does not tend to tilt as in the conventional case, and the stroke of the card becomes constant, making the characteristics more stable.

Moreover, since the card is directly driven by the armature, the structure is simple, and the power is transmitted efficiently from the armature to the contact spring; This has the effect of reducing the magnetomotive force of the electromagnet and reducing power consumption.

[Brief explanation of the drawing]

1 is a front view of a conventional example, and FIG. 2 is a front view of an embodiment of the present invention, in which 1 is a contact spring, 2 is a fixed end, 3 is a free end, 4 is a common terminal, 5 is a contact, 6 is a card, 7 is a leg, 8 is an engaging protrusion, 9 is an electromagnet,
10 is an armature.

Claims (1)

[Scope of utility model registration request] Two contact springs are arranged approximately in a straight line so that the fixed ends are on the outside and the free ends are facing each other, and the contacts of the common terminal are arranged on one side of both contact springs, and the center is pivoted. A roughly U-shaped contact driving card is disposed on the other side, and the contact springs are alternately driven at the tips of both legs of the card.
A relay in which an armature of an electromagnet is engaged with an engaging protrusion protruding from a part of the card, and the card is driven to rotate against the spring force that urges the card in one rotation direction by the electromagnet.