Electrical connectors – With coupling movement-actuating means or retaining means in... – Retaining means
Patent
1998-07-31
2000-10-17
Nguyen, Khiem
Electrical connectors
With coupling movement-actuating means or retaining means in...
Retaining means
439578, H01R 13627
Patent
active
061322342
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The invention deals with a coaxial plug connector with the concrete characteristics described in the preamble of claim 1. This kind of plug connector, used in communications technology applications, is known as "IEC-plug connector" (IEC 169-16). The jack of the IEC-plug connector has an outer conductor, also known as a socket, with a conical interior surface which provides a contact area for the longitudinally slotted sleeve of the plug which is pulled into the jack by threading a coupling nut provided on the plug onto the external thread of the jack, while elastically contracting the sleeve of the plug as it is pulled into the socket. This known IEC-plug connector is proven technology. With growing demand for communications technology applications in the automotive sector such as radio receivers, mobile phones, cassette players, CD-players, on-board computers, proximity warning devices, navigation systems, electronic toll collection systems, there is a growing need for coaxial plug connectors which are not only cheaper than conventional ones, but can be miniaturized and easily worked with under cramped working conditions during installation into an automobile.
GB 2 139 018 A discloses coaxial plug connectors with a snap lock which are comprised of a fixed component to be installed on an equipment enclosure, whereby the outer conductor of the fixed component is divided into several segments by longitudinal slots, and whereby these segments have protrusions at their tips with which they are inserted into the outer conductor of a jack which is to be connected with a coaxial cable, and whereby the protrusions latch into a ring groove in the jack. Since the connection can only be unlocked by applying tension, the locking effect of this snap lock is inevitably unreliable.
The object of the invention on hand is to respond to the demand for cheap, easily lockable and unlockable, yet still securely connectable, plug connectors for cabling in motor vehicles.
This object is solved by plug connectors with the characteristics described in claims 1 and 2. Advantageous further developed embodiments of the invention are the subjects of the dependent claims.
In order to be able to comfortably plug and unplug the connection of the plug connector according to the invention, the plug and the jack are not screwed together, as in the case of the IEC-plug connector, but locked together by a latching spring. This latching spring is mounted on the plug housing, preferably retained by a ring groove located on the outside of the plug housing. The retainer ring groove allows the latching spring to rotate around the center line of the plug but not to translate parallel to it. The retainer ring groove is located in the vicinity of the dielectric bushing at the transition between the rear and front sections of the plug. The front section is designed as a sleeve. At least one finger extends from the groove alongside the outer surface of the sleeve. Suppose now that the outer conductor of the jack, also known as a socket, receives the sleeve of the plug; then, the fingers on the outer sleeve surface extend no further than the front edge of the sleeve and can bear on the sleeve by way of their protrusions. As the plug is pushed into the outer conductor of the jack, the fingers are lifted by the outer conductor, slide alongside it, and finally latch behind the provided locking means. If, however, the sleeve of the plug receives the outer conductor of the jack, then the fingers, of which there are at least one, extend alongside the outer sleeve surface and beyond the sleeve's front edge, whereby a protrusion is provided at the end of each finger pointing toward the center line of the plug. As the plug is pushed onto the jack, the projections of the fingers slide along the outside of the jack until they reach a groove or projection, especially a shoulder, on the outside of the jack; as the plug is pushed further onto the jack, the fingers bend outwardly in radial direction as they slide over the shoulder. As soon as the projecti
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Aydt Gabriele
Waidner Frank
Nguyen Khiem
Wilheilm Sihn, Jr., KG
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