Electrical connectors – Coupling part including flexing insulation – Having plural – laterally spaced – prongs or prong sockets
Patent
1996-03-22
1998-04-28
Paumen, Gary F.
Electrical connectors
Coupling part including flexing insulation
Having plural, laterally spaced, prongs or prong sockets
439903, H01R 1340
Patent
active
057437637
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention concerns mobile electrical connectors, such as sockets and plugs of industrial type, and in particular a socket and a plug which facilitates assembly.
As it is known, many electric apparatuses are used both in the industrial field in general and in the handicraft and services fields. These require a connection to the electrical network or one to the other through mobile, i.e. not wall-fixed, plugs and sockets.
The safety regulations for these product are increasingly strict and in particular the latest IEC regulation concerning this matter (309-1-2) requires that the mobile plugs and sockets are made in such a way as to necessarily require a tool to disassemble them.
The plugs and sockets comprise said application, in a first part, called "housing", and a second part, called an "insert", which is mounted on the housing. Reference will be made in the following to a socket, being clear that what will be said can be applied to a plug too.
In the sockets of the prior art, the mounting of the insert on the housing is usually carried out by means of a pair of screws, so as to satisfy the above-cited IEC 309-1-2 regulation. This is because it is not possible to disassemble the socket with the bare hands; a screwdriver is required.
An example of such a socket is disclosed in CH-A-596.677 which relates to a two-part connecter plug assembled by means of a bayonet arrangement which is secured by means of screws or the like.
However, this solution has the serious drawback that the mounting also obviously requires the use of the screwdriver and therefore wastes time. Since these mobile sockets and plugs are mounted in thousands on various electric tools and the like (drills, welders, etc.) which are used in the environments considered in the relevant plant regulations, a substantial waste of time results from their use with a consequent increase in the labour cost for the assembly of the plugs and sockets.
A socket already exists which overcomes these drawbacks by means of two shaped profiles which are formed on the facing surfaces of two projections located in the frontal area of the coupling abutments. These projections may be mutually engaged so as to block the rotation between the insert and the housing leaving therebetween a cavity wherein a tool is to be inserted to disengage said profiles.
This solution, though effective, has the drawback that the tool directly acts on the shaped profiles, usually made of plastic, and can thus cause a permanent deformation, especially in case of repeated disassembling.
SUMMARY OF THE INVENTION
Therefore, the object of the present invention is to provide an electrical connector which can be easily assembled with no need to use tools or additional fastening elements such as screws, yet can satisfy the above-cited IEC 309-1-2 regulation and does not cause deterioration of the blocking members even in case of repeated disassembling.
This object is achieved by means of an electrical connector, such as a socket, having the characteristics cited in claim 1.
The electrical connector of the present invention significantly reduces the time, and, thus, the cost, required for mounting the insert in the housing.
A further advantage, with respect to the electrical connector of the present invention is that it is capable of repeated disassembly without deterioration of the blocking elements.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other advantages and characteristics of the device according to the present invention will be apparent from the following detailed description of a preferred embodiment thereof, reported as a nonlimiting example, referring to the annexed drawings wherein:
FIG. 1 is a perspective exploded view of the members making up the socket according to the present invention;
FIG. 2 is a perspective view of the three parts of the preceding figure assembled but not yet blocked; and
FIG. 3 is a perspective view of the socket of FIG. 2 in the blocked position.
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIG. 1, there
REFERENCES:
patent: 4053198 (1977-10-01), Doyle et al.
patent: 4354723 (1982-10-01), Lee
patent: 4793821 (1988-12-01), Fowler et al.
patent: 4834667 (1989-05-01), Fowler et al.
patent: 5145394 (1992-09-01), Hager
Paumen Gary F.
Scame Parre S.p.A.
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