Electricity: circuit makers and breakers – Electric switch details – Contact
Patent
1992-04-23
1994-11-29
Echols, P. W.
Electricity: circuit makers and breakers
Electric switch details
Contact
200283, 29622, 29514, 295221, H01H 106, H01H 1104, B21D 3900
Patent
active
053692357
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a process for manufacturing a contacting device in which an end section of an electrical connecting line is guided to a first flat side of a leaf-shaped contact support, led through a recess of the contact support and connected in an electrically conductive fashion to a contacting piece on the second flat side of the contact support lying opposite. In addition, the invention relates to a correspondingly designed contacting device and a use of this contacting device.
From the German Registered Utility Model 81 09 089 a contacting device is already known which is manufactured in the way mentioned at the beginning. In this publication, for the purpose of feeding a switching current from one side of the contact support engaging through a recess of the contact support constructed as a punch-through, one end of an electrical connecting line is connected in an electrically conductive fashion to a contacting piece on the other side of the contact support. The one end of the electrical connecting line and the recess of the contact support, respectively, have to be exactly matched to one another in their dimensions in order to permit the one end to be fed through the recess in a fashion which is as free of play as possible and yet as simple as possible. In particular when manufacturing relatively small contacting devices, the positioning of the one end relative to the recess of the contact support is difficult and causes an additional production expenditure which contributes to the production costs. In the case of changes to the dimensions of the recess of the contact support, whether they be constructionally necessary changes or due to tool wear, matching of the tool which manufactures the one end is required.
European reference 0,167,688 (corresponding to U.S. Pat. No. 4,647,743) already discloses a contacting arrangement in which a connecting line in the form of a stranded conductor is connected directly to a contacting piece. This publication is particularly concerned with the problem that the contact support in the form of a central contact spring is to be provided on both sides with a contacting piece. In order to cold weld the connecting stranded conductor it is therefore proposed in this publication to allow one of the contacting pieces to extend over the width of the contact spring end and to cold weld the stranded conductor to the protruding part. The second contacting piece is constructed in this publication as a contacting rivet with a round cross-section which is connected by a corresponding projection, engaging through a hole of the spring, to the elongate contacting piece first mentioned. These round contacting pieces require a relatively high degree of production expenditure; in addition, there is the risk that the two associated contacting pieces are rotated in the hole of the contact spring by tensional forces on the stranded conductor, as a result of which the position of the elongate contacting piece in relation to its corresponding contacting element would change.
SUMMARY OF THE INVENTION
The object of the invention is to provide a process of the type mentioned at the beginning and a corresponding contacting device which is as easy and economical to manufacture as possible, in which case in particular a direct connection of a connecting line both in a single contact to the contacting piece of the contact support and in a switch contact to both contacting pieces of a central contact spring is possible, and contacting pieces which are as economical as possible can be used.
According to the invention, the object relating to the process is achieved in that the end section of the connecting line is placed with a pressed-flat longitudinal side parallel on the first flat side of the contact support, covering the recess on all sides, in that an extension is stamped out of the end section of the connecting line perpendicularly to the flat side through the recess of the contact support and in that during the stamping process the contact support itse
REFERENCES:
patent: 3930211 (1975-12-01), Belttary
patent: 4059897 (1977-11-01), Marquis
patent: 4647743 (1987-03-01), Kern et al.
Echols P. W.
Siemens Aktiengesellschaft
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