RU199663U1 - Contact device - Google Patents

Abstract

The utility model relates to electrical engineering and can be used in electrical circuit switching systems. The contact device contains a knife contact and opposed spring elements with an end bend. The spring elements are formed in a single plate bent symmetrically on both sides of the blade contact. The technical result is to simplify the technology of manufacturing a contact device. 2 ill.

Description

The utility model relates to electrical engineering, namely to devices for switching electrical circuits.

Known contact device containing at least two contact elements, one of which is made in the form of two plates, equipped with limiters for their rejection when exposed to mechanical and / or electrodynamic forces. The plates are made elastic, and the limiters of their rejection are rigidly fixed on the axis, placed with a gap in the holes made in the plates. A limiter of their internal relative displacements is additionally introduced between the plates, installed with a gap on the axis. Patent of the Russian Federation for invention No. 2276422, IPC Н01H 1/50, Н01H 1/42, 10.05.2006.

The contact device includes a vibration amplitude limiter to eliminate single-frequency resonance, which can occur during shock and vibration influences. In this case, the contact device requires the development of complex manufacturing processes, which limits the scope of its application.

Known contact device containing knife contact and spring elements, characterized in that the spring elements are made in the form of two oppositely located packs of springs, cut along, each spring is made with a rounding at the end and with an end bend, and the knife contact is made with convex contact surfaces ... Patent of the Russian Federation for utility model No. 132611, IPC Н01H 35/14, 20.09.2013. This technical solution was adopted as a prototype.

The contact device is resistant to single-frequency resonances due to the use of spring elements made in the form of two opposed spring packs, increased wear resistance of the contact surfaces due to the use of end bends on the springs and increased reliability due to the increase in the number of contact points, which make it possible to ensure reliable electrical contact. However, the use of separate spring elements in the prototype, requiring their careful assembly into packages, complicates the manufacturing technology of the contact device as a whole.

The task of the utility model is to create a contact device that does not require a complex manufacturing technology.

The technical result is to simplify the technology of manufacturing a contact device.

The technical result is achieved by the fact that the contact device comprises a knife contact and opposed spring elements with an end bend, the spring elements are formed in a single plate symmetrically bent on both sides of the knife contact.

The essence of the utility model is illustrated by drawings.

FIG. 1 schematically shows a contact device in an actuated state, where:

1 - knife contact;

2 - spring elements;

3 - end bend;

4 - base.

FIG. 2 schematically shows a plate with spring elements 2 formed therein in an expanded form.

The contact device is a contacting pair: blade contact 1 and a contact formed by spring elements 2. In the actuated state of the contact device (Fig. 1), blade contact 1 is located in the gap between opposing spring elements 2, the edges of which are in order to ensure a smooth shockless contact connection are made with end bend 3. The spring elements are fixed on the base 4, which can be used as a conductive bearing part - an electrode.

The spring elements 2 are formed in a single plate (Fig. 2). Their number and length are selected to eliminate single-frequency resonance that can occur during shock and vibration effects on the contact device: an increase in the number of spring elements and the difference in their lengths make it possible to increase the reliability of the closure, due to an increase in contact points and a difference in the natural resonant frequencies of each spring element. By selecting the thickness of the plate in which the spring elements are formed, they provide the necessary rigidity and the contact force required in each particular case between the blade contact 1 and the spring elements 2. The opposite arrangement of the spring elements, as well as the uniformity of the trajectories of their contact points when the blade contact 1 is displaced, is ensured the fact that the plate is symmetrically bent on both sides of the blade contact.

The contact device works as follows.

When the contact device is triggered, the knife contact 1 enters the gap between the opposed spring elements 2. The end bend 3 of each spring element 2 provides a smooth shockless closing between the knife contact 1 and the spring elements 2, while the spring elements deviate from their initial position in different ways , depending on its length. On both sides of the knife contact 1, the spring elements move along the same trajectories, providing a uniform contact force, which increases the resource of the contact device.

A significant simplification of the contact device manufacturing technology is achieved by the fact that the spring elements are formed in a single plate, and their manufacture can be carried out by cutting with a stamp.

Claims (1)

A contact device containing a knife contact and opposed spring elements with an end bend, characterized in that the spring elements are formed in a single plate symmetrically bent on both sides of the knife contact.

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