Electrical plug-and-socket connection

Details Electrical plug-and-socket connection Electrical plug-and-socket connection

1996-07-02

1999-05-25

Swann, J. J.

Electrical connectors

With sealing element or material for cooperation with...

439272, H01R 1352

Patent

active

059064994

DESCRIPTION:

BRIEF SUMMARY
The invention proceeds from an electrical plug-and-socket connection in accordance with the preamble of claim 1.
Such a plug-and-socket connection is disclosed in DE 35 40 831 C2. The plug-and-socket connection described therein consists of a first and a second housing part. A hollow cylindrical sealing member, which is arranged on a cylindrical component in one of the two housing parts, has lips of different diameter in an alternating sequence. The larger lips in this case overlap the socket-shaped insertion section of one of the housing parts. As a result, these sealing lips are deflected arcuately in the axial direction upon coupling of the plug-and-socket connection. The small lips delimit the interspace available for the bent sealing lips, and have no sealing function. The housing parts are locked after their end position is reached.
U.S. Pat. No. 4,946,402 discloses a further such plug-and-socket connection, whose sealing member likewise has sealing lips of different diameter. Both the continuous conical construction of the insertion region of the first housing part, and the corresponding arrangement of the sealing lips cause compression of all the sealing lips between the housing parts when the plug-and-socket connection is brought together. The sealing principle, applied there, of compression sealing is very expensive in terms of force, resulting in-a correspondingly high force component in the plug-in force. The type of sealing is unsatisfactory from this aspect of optimizing the expenditure of force.
DE-AS 25 55 147 describes a plug-and-socket connection in which the sealing between the housing parts is likewise performed essentially according to the above-named principle. A hollow cylindrical sealing member having three radial sealing lips is fastened to a cylindrical component of one housing part. The outside diameter of the three sealing lips is larger than the inside diameter of a socket-shaped housing part, with the result that the lips of the sealing member are deflected arcuately in the axial direction when the housing parts are pushed together. When the plug-and-socket connection is coupled, the air is compressed and escapes along the inner walls of the socket-shaped housing part and the outer ends of the sealing lips, the result being that the arcuate course is produced thereby and by the oversized lips. Locking of the housing parts does not take place, since the adhesive properties of the rubber and the bent sealing lips do not permit inadvertent decoupling. The separating forces increase with the number of sealing lips.
Moreover, it is known from DE-OS 2745887 to arrange a sealing member between a high-voltage cable and a housing part for the purpose of producing a gas-tight connection. After the cable end has been fitted with the sealing member, it is inserted into the housing part and secured with a metal sleeve at the rear. A cable receiving opening in the housing part extends conically in order to permit a simple interplugging with the sealing member, which is of beveled construction. Three sealing lips arranged outside on the sealing member ar constructed in accordance with the beveling with a decreasing diameter. The effect of the metal sleeve is, inter alia, that the sealing lips are compressed in the insertion opening and thus ensure tightness.
A further watertight connection is disclosed in U.S. Pat. No. 4,417,736. In this case, a cylindrical housing part is arranged in a socket-shaped housing part with the inter-position of a seal. The seal encloses the cylinder and is beveled like the cylinder itself in the plug-in direction. The receptacle of the socket-shaped housing part has a form which is the complement of this. The sealing member is formed with compressible lips on the inner and outer walls, which ensure adequate sealing and simultaneously decrease centering problems.
The above-named plug-and-socket connections exhibit the basic principles of sealing housing parts by means of a sealing member constructed with lips. Depending on the degree of oversizing of the sealing l

REFERENCES:
patent: 3550065 (1970-12-01), Phillips
patent: 3937545 (1976-02-01), Cairns et al.
patent: 4637674 (1987-01-01), Kobler
patent: 4946402 (1990-08-01), Fink et al.
patent: 5372516 (1994-12-01), Maeda

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