DD265732A1 - CONTACT SUSPENSION FOR RELAY - Google Patents

Abstract

The invention relates to a contact spring set, as it is used, for example, in relays, the active contact spring is moved in the range between the center of the spring and Schaltstueckoberkante by means of Betetigungselement from the relay anchor. By the invention, the active contact spring should have sufficient over-springing in the case of contact on the closing side and allow the use of rigid mating contacts. Furthermore, the Betetigungselement to thermally relieved zones of this contact spring attack and the work capacity of the drive system can be optimally used. This is achieved by the fact that the active contact spring has symmetrical to their longitudinal axis arranged spring arms and the free ends of the spring arms form the attack zones of Betetigungselementes. Furthermore, characterized in that the spring arms are preferably arranged parallel to the Federlaengsachse and connected in the middle third of the effective spring length with the axial part of the active contact spring, and that the points of action of Betetigungselementes lie in the upper third of the effective spring length. figure

Description

For this 1 page drawing

Field of application of the invention

The invention relates to an embodiment of the contact spring set for relay whose active contact spring is moved in the area between the center of the spring and the upper edge of the switching element by means of actuating element from the relay armature.

Characteristic of the known state of the art

Known embodiments of the contact spring set have predominantly one of de basic shape ago rectangular or trapezoidal design of the active contact spring, which is mittete a little above or below the contact piece engaging web of the actuating element is moved. Your then slight over-springing after the make contact requires a, the Kontaktmitgang realizing, elastic closing spring. More advantageous solutions with a rigid mating contact are thereby prevented. The low electrical and thermal conductivities of an elastic closing spring as well as contact-near attack of the actuating element further severely limit the current-carrying capacity of such contact spring sets.

Analogous versions with a relatively large distance of the point of attack of the actuating element to the contact point and thus higher over-spring buy the applicability of rigid mating contacts by a reduced relay efficiency due to the then unfavorable utilization of the working capacity of the drive system.

A well-known cheap spring set version increased Strombelititbarkeit (DE-OS 2848934) realizes the over-springing of the active contact spring, characterized in that the spring section between the contact piece and the attack zone of the actuator:! * Receives a much softer characteristic at the spring end by a special recess. This limited to KontaktfedersBue with above the contact piece attacking actuator also no optimal solutions in terms of utilization of rvagnetischen working capacity and low relay dimension in the spring longitudinal direction.

Object of the invention

The aim of the invention is oine favorable design of the contact spring set for relays in terms of high current carrying capacity, ger'ngem effort and good utilization de * working capacity of the drive system.

Explanation of the breadth of the invention The invention is based on the charge, in particular the active spring of the contact spring set for relay of the beginning

mentioned type to be executed so that it has a sufficient over-springing at the Schließorseitigen contact and the

Use of rigid mating contacts allows the actuator to thermally relieved zones of the active contact spring

attacks, and that by a favorable variability of the Uberfederung and the location of the point of attack of the

Actuating element to the contact point the working capacity of the drive system is well used. According to the invention the object is achieved in that the active contact spring arranged symmetrically to its longitudinal axis Spring arms' ind by means of a symmetrically acting on the free ends of these spring arms Betätigungselementos

is moved.

In an expedient embodiment, the spring arms are arranged parallel to the spring longitudinal axis and in the middle well

überfedernden third of the effective spring length connected to the axial part of the active contact spring, and the attack of the

Actuating element at the free ends of the spring arms is in the upper third of the effective spring length.

For arrangements without special guidance of the actuating element, the free ends of the Federarn a expediently provided with holes in which the actuating element engages with appropriately sized slugs under warranty dos necessary movement play.

AusfOhrungibeispiei

Reference to a reproduced in the drawing embodiment, the invention is explained in detail. Shown is an exploded view of the design of the contact spring set of a relay on the example of a closer arrangement high current carrying capacity. The active contact spring 1 beei symmetrical to its longitudinal axis arranged spring arms 2 and is moved by means of the symmetrise »acting on the free ends of the spring arms 2 Betätigungselementos 3. The narrow spring arms 2 are arranged to save space parallel to the axial part of the active contact spring 1 and connected with diesar in the middle third B of the effective spring length 4. In the example shown without special guide aids, the support element 3 engages with slugs 8 under the guarantee of the necessary movement play in circular holes 7 of the spring arms 2.

The relatively long metallic connection path between the contact piece and the attack zones of the actuating element 3 brings for the latter a significant thermal relief. In particular, by the approach of the spring arms 2 in the middle region of the effective spring length 4 sufficient over-springing is achieved and the Einsau a, the current carrying capacity increasing, rigid closing spring possible. Since the height of the attack of the actuating element 3 and the over-springing for a given position of the switching piece are well varied, an optimal adjustment of the contact spring set can be made to the drive system.

Claims (3)

1. Contact spring set for relay deseen active contact spring in the area between the spring center and upper switching piece is moved by actuator from the relay anchor, characterized in that the active contact spring (1) arranged symmetrically to its longitudinal axis spring arms (2), and that the free ends of the spring arms (2) the attack zones of the actuating element (3). 2. Contact spring set for relay according to claim 1, characterized in that the spring arms (2) preferably arranged parallel to the spring longitudinal axis and in the middle third (5) of the effective spring length (4) with the axial part of the active contact spring (!) Are connected, and that the points of attack of the actuating element (3) at the free ends of the spring arms (2) in the oboren third (6) of the effective spring length (4). 3. Contact spring set for relay according to claim 1 or 2, characterized in that the free ends of the spring arms (2) preferably contain circular holes (7), and that the actuating element (3) in these holes (7) while ensuring the movement clearance engaging slugs (8).