Electrical connectors – Contact comprising cutter – Insulation cutter
Patent
1995-11-30
1998-03-03
Swann, J. J.
Electrical connectors
Contact comprising cutter
Insulation cutter
439404, 439488, H01R 424
Patent
active
057228523
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a module for the connection of actuators and/or sensors, having a housing and having a contact-making device which is accommodated in the housing and is used to make contact between line cores of a multicore cable and contacts which are connected to an electrical circuit of the module.
Modules of this type are already commercially available from various manufacturers, including the applicants themselves. The modules are implemented using plug-in technology. A further development of these modules has led to an improved bus module for the connection of a plurality of subscribers (actuators, sensors), which comprises a top part, complying with the requirements of the user, as a so-called user module, and a bottom part for contact-making. Since the cable is used as a bus line to which a multiplicity of modules are intended to be connected, the design of the module including its contact-making system is of particular significance.
The invention is based on the object of providing a module which has a simple structure and by means of which the cable can be made contact with in a simple, cost-effective and reliable manner. This object is achieved in accordance with the features as claimed in patent claim 1. In an advantageous development of the subject matter according to the invention there is provided in the housing a press-on surface which, when the housing is closed, presses the line basket, which is latched in the upper position, together with the inserted cable down into the lower position. This means that the line basket is automatically displaced into the lower position when the housing is closed, the line cores at the same time making contact with the contacts. Assembly is consequently simple and user-friendly.
The abovementioned latching of the line basket in two vertical positions is implemented in a particularly simple manner in accordance with the following embodiment. In the case of this embodiment, for the purpose of latching the line basket in its two positions, the guiding part has on its inside first longitudinal grooves and second longitudinal grooves which are offset in terms of height and length. The line basket is provided on its outside with first and second latching lugs which are matched to the first and second longitudinal grooves. In the upper position the line basket latches with its first latching lugs in the first longitudinal grooves. This latching is canceled in the event of displacement into the lower position with clamping action on the cable. In the lower position the line basket latches with its second latching lugs in the second longitudinal grooves. In the case of the embodiment described, a corresponding strain relief is produced on account of the clamping action on the cable in the lower position.
In accordance with a further advantageous development, the guiding part has in its longitudinal direction a center region and two end regions adjoining the latter on both sides. The second longitudinal grooves and the contact tips are arranged in the center region and the first longitudinal grooves are arranged in the end regions. The line basket has corresponding opposite subregions. The second latching lugs and the positioning means designed as snap-action hooks are arranged in the center region of said basket and the first latching lugs are arranged in a vertically offset manner in its end regions. The center and end regions of the line basket are separated from one another by slots which extend as far as the basket base and are directed transversely with respect to the longitudinal axis. This embodiment ensures not only that the line basket cannot be lifted out from its upper latched position, but also that it is locked in the longitudinal direction and hence is connected captively to the guiding part.
It is furthermore advantageous if contact is made between the line cores and the contacts by connecting a top-part housing to the bottom-part housing and if, in the process, a bulge in the form of a pressure post in a bottom-end cover of the top-part hou
REFERENCES:
patent: 4934953 (1990-06-01), Tenham et al.
patent: 5211575 (1993-05-01), Ustin
patent: 5240432 (1993-08-01), Daoud
Siemens Aktiengesellschaft
Swann J. J.
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