Positional encoder with an electrical connection unit

Details Positional encoder with an electrical connection unit Positional encoder with an electrical connection unit

2000-09-07

2001-05-15

Patel, Tulsidas (Department: 2833)

Electrical connectors

Including or for use with tape cable

For connection to rigid preformed panel circuit arrangement,...

C439S395000

Reexamination Certificate

active

06231377

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a positional encoder assembly consisting of a positional encoder and an electrical connection unit.
2. Description of the Prior Act
A positional encoder assembly consisting of a positional encoder and an electrical connection unit is disclosed in German Publication DE 196 04 489 A1. In the known assembly, an electrical plug-in connector is arranged on a board of a shaft encoder and is connected with a flexible printed circuit which has an end located outside of the encoder housing and connected with a connector plug. The connection pins of the connector plug are soldered to strip conductors of the printed circuit. This electrical connection is expensive in manufacturing, and the solder connections can be fractured.
In the known assembly, the printed circuit is provided with coating layers for protection against electromagnetic fields. The coating layers are electrically connected with the encoder housing by clamping.
The object of the present invention is to provide a positional encode assembly with an electrically connection unit and which can be produced in a simple manner and cost-effectively.
Another object of the present invention is to provide a positional encoder assembly with a reliable connection of the encoder with a mating connector.
SUMMARY OF THE INVENTION
These and other objects of the present invention, which will become apparent herein after are achieved by providing a positional encoder assembly including a plug-in connector, a circular connector spaced from the positional encoder and having a plurality of contact pins, and a ribbon cable connected, at one of its opposite ends, with the plug-in connector and, at another of its opposite ends, with the circular connector. An adaptor board is arranged between the another end of the ribbon cable and the circular connector for connecting electrical conductors of the ribbon cable with the contact pins of the circular connector. The adaptor board transforms an arrangement of the electrical conductors in the ribbon cable into an arrangement of the contact pins of the circular connector which is different from the arrangement of the electrical conductors in the ribbon cable. According to the present invention, a ribbon cable replaces a rather expensive circular cable which is also difficult to connect. A ribbon cable can be rather easily connected with a connector by a ribbon cable connector with insulation displacement contacts.
The novel features of the present invention, which are considered as characteristic for the invention, are set forth in the appended claims. The invention itself, however, both as to its construction and its mode of operation, together with additional advantages and objects thereof, will be best understood from the following detailed description of preferred embodiments, when read with reference to the accompanying drawings.


REFERENCES:
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patent: 6050842 (2000-04-01), Ferrill et al.
patent: 6050845 (2000-04-01), Smalley, Jr. et al.
patent: 6093048 (2000-07-01), Arnett et al.
patent: 6109950 (2000-08-01), Trammel
patent: 1987766 (1968-02-01), None
patent: 3607409 (1987-06-01), None
patent: 9604489 (1997-08-01), None

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