Connector bushing having an improved central base zone

Details Connector bushing having an improved central base zone Connector bushing having an improved central base zone

1998-12-09

2000-05-30

Donovan, Lincoln

Electrical connectors

Metallic connector or contact having movable or resilient...

Spring actuated or resilient securing part

H01R 13187

Patent

active

060685263

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

This invention relates to a connector bushing. Such a connector bushing has been known from EP 573 825 A1 and FR-1 560 917 A1 as well as from DE-OS 1 904 354 and DE-4 314 363 C2. Connector bushings of this kind are used particularly where high contact pressure between the bushing parts and the pin introduced therein is important. Such connectors have also proved satisfactory in applications in which the connection is subject to considerable vibration.
Although conventional connector bushings of this kind already ensure high contact pressures on the introduced pin, this does not automatically result in good electrical contact, particularly if there has been slight tilting on introduction of the pin, in cases where such tilting cannot be automatically corrected. The resulting transition resistance and any local overheating and subsequent risk of oxidation impair the conductivity of this connection.
German utility model 8 811 020 describes a surmounting spring for preventing the connector bushing from spreading apart.


SUMMARY OF THE INVENTION

This invention is based on the problem of improving a connector bushing of the type referred to in such manner as to ensure high contact pressure on the pin while ensuring high conductivity of the connection.
This problem is solved in accordance with the claimed invention. In accordance with this invention a connector bushing comprises a plug-in zone and a cable connection zone. The plug-in zone is formed as a bushing with a base, two side walls bent from the base, and first and second roof halves which start from the side wall and have free ends which are bent over towards the interior of the bushing. In accordance with this invention the connector bushing further comprises a central base zone following the plug-in zone which is formed in the shape of a box, with a base part comprising an extension of the base of the plug-in zone and with side walls comprising an extension of the side walls of the plug-in zone. The central base zone further includes a roof zone which is formed by third and fourth roof halves which are formed by bending over the side walls of the central base zone.
In accordance with this invention ribs are provided in the base of the connector bushing, in order to reliably insure adequate contact surfaces for the contact and prevent deformation of the connector bushing by surrounding it in a rigid cage. This decisively improves the contact pressure and electrical conductivity of the connector bushing according to the invention.


BRIEF DESCRIPTION OF THE DRAWINGS

One exemplified embodiment of a pin bushing according to the invention will be explained hereinafter with reference to the drawing wherein:
FIG. 1 shows a pin bushing according to the invention in perspective.
FIG. 2 is a partial section and plan view along the longitudinal centre-line in the region of the bushing.
FIG. 3 shows the connector bushing of FIG. 1 seen from below and above.
FIG. 4 shows the connector of FIG. 1 with the box-shaped surmounting spring, and
FIG. 5 shows the surmounting spring of FIG. 4 in side view and plan view.


DETAILED DESCRIPTION

The connector 1 shown in FIG. 1 comprises a plug-in zone 2, a central base zone 20, a flattened U-shape zone 30 and a cable connection zone 3. The plug-in zone 2 is formed as a bushing 4, having a base 5 in which two ribs 6 are stamped, which project towards the interiour of the bushing and each extend parallel to the longitudinal centre-line 10 of the connector. Side walls 7a, 7b are bent over at 90.degree. at the two longitudinal edges of the base and adjoining the top edge of each is a roof half 8a, 8b, the front edges of which are again bent over towards the interior of the bushing, the front edges extending parallel to one another and parallel to the surface of the base.
The cable connection zone 3 is formed as a crimp connection here, but this is only one of numerous possibilities depending on the problem involved.
An opening 13 is visible in the side wall 7b in the rear zone of the bushing and ther

REFERENCES:
patent: 4550963 (1985-11-01), Moors
patent: 4932877 (1990-06-01), Zinn
patent: 5281178 (1994-01-01), Biscorner
PCT International Search Report Sep. 1997 (No Date).

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