RU221104U1 - 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 blade contact and opposing spring elements with an end bend. The spring elements additionally contain wire elements attached to the end bends, made in the form of molded liners from a chaotically laid tangle of thin wire. The technical result is to increase the reliability of the contact device. 1 ill.

Description

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

A contact device is known that contains 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 their ejection limiters are rigidly fixed on an axis located with a gap in the holes made in the plates. Between the plates there is an additional limiter for their internal relative movements, installed with a gap on the axis. Patent of the Russian Federation for invention No. 2276422, IPC N01N 1/50, N01N 1/42, 05/10/2006.

The contact device includes a vibration amplitude limiter to eliminate single-frequency resonance, which can occur during shock and vibration. However, the design of the contact device does not provide elements to eliminate chattering of the contact connection when closing the contact elements, which reduces reliability and limits its scope of application.

Since the chatter of a contact connection occurs after the closure of electrical contacts due to multiple uncontrolled short circuits and openings, a constructive way to eliminate chatter is to use additional elements in contact pairs that provide multi-point electrical contact with different natural resonant frequencies at each contact point.

An electrical connector is known that contains a plug with contact pins and a socket with contact elements - sockets. Wire elements are fixed to the contact elements of the socket, made in the form of a chaotically laid tangle of thin wire, with the possibility of direct transmission of multi-point electrical contact between the contact pins of the plug and the contact elements of the socket. Patent of the Russian Federation for utility model No. 203770, IPC H01R 13/02, 04/21/2021.

A similar technical solution is also known, the contact elements of the socket are made in the form of spring-loaded disks, with the possibility of squeezing the wire elements, which allows for multiple connections of contact pairs while maintaining the squeezing force, which makes it possible to increase the reliability of the electrical contact. Russian Federation patent for utility model No. 213677, IPC H01R 13/66, 09/21/2022.

Due to their design features, these technical solutions cannot be used in dynamic operating modes with constant movable closing and opening of contact elements due to the form of contact elements in the form of pins-sockets.

A contact device is known that contains a blade contact and spring elements, wherein the spring elements are made in the form of two opposing sets of springs, cut lengthwise, with each spring being rounded at the end and with an end bend, and the blade contact is made with convex contact surfaces. Patent of the Russian Federation for utility model No. 132611, IPC N01N 35/14, 09/20/2013. This technical solution was adopted as a prototype.

The presence of spring elements, made in the form of two opposing spring packages, makes it possible to increase the resistance of the specified contact device to single-frequency resonances. At the same time, the wear resistance of contact surfaces during dynamic operation of the contact device is ensured through the use of end bends on springs, and an increase in the number of contact points allows for reliable electrical contact. At the same time, the use of separate spring elements, requiring their careful assembly into packages, complicates the process of their manufacture. Reducing the possible chatter of a contact connection with constant closure of the contact elements largely depends on the quality of assembly of the spring packages in a given device, which reduces the reliability of the device, especially under automated assembly conditions.

The objective of the utility model is to create a contact device that provides guaranteed multipoint contact and has increased reliability in dynamic operating modes, with constant movable closing and opening of contact elements, due to the form of their implementation, including in automated assembly conditions.

The technical result is to increase the reliability of the contact device.

The technical result is achieved in that the contact device contains a blade contact and opposing spring elements with an end bend, wire elements attached to the end bends, made in the form of molded inserts from a chaotically laid tangle of thin wire.

The essence of the utility model is illustrated by a drawing, which schematically shows the contact device in the actuated state, where:

1 - knife contact;

2 - spring elements;

3 - end bend;

4 - base;

5 - wire element.

The contact device is a detachable contact connection between the blade contact 1 and the contact with the spring elements 2. In the activated state of the contact device, the blade contact 1 is located in the gap between the oppositely located spring elements 2, the edges of which are made with an end bend 3, on which wire elements 5 are fixed , made in the form of molded inserts from a chaotically laid tangle of thin wire. The spring elements are fixed to the base 4, which can be used as a current-conducting stationary contact part - an electrode.

The length of the spring elements 2, the configuration of the liners 5 formed from chaotically laid thin wire and the size of the contact zone are selected in each specific case of using the contact device to eliminate chatter that can occur during shock and vibration impacts on the contact device. At the same time, an increase in the contact area of the wire elements 5 and the blade contact 1 makes it possible to increase the reliability of the closure, due to the increase in the number of contact points and the difference in the natural resonant frequencies of the thin wire elements at each point of its contact with the blade contact 1. The opposite arrangement of the spring elements 2 and their shape allows for smooth, shock-free contact connection with blade contact 1 when it is displaced and, accordingly, uniform contact force.

Copper and its alloys can be used as materials for all conductive elements, as well as thin wire.

The contact device works as follows.

When the contact device is triggered, the blade contact 1 enters the gap between the oppositely located spring elements 2. The end bend 3 of each spring element 2, on which the wire elements 5 are fixed, ensures a smooth, shock-free, bounce-free closure between the blade contact 1 and the spring elements 2.

The use of wire elements to provide a bounce-free multi-point contact increases the reliability of the contact connection and, thus, the contact device as a whole. In this case, the manufacture of a contact device does not require complex technological operations.

Claims (1)

A contact device containing a blade contact and opposing spring elements with an end bend, characterized in that the spring elements additionally contain wire elements attached to the end bends, made in the form of molded liners from a chaotically laid tangle of thin wire.