Electrical connectors – Including or for use with tape cable – For connection to rigid preformed panel circuit arrangement,...
Reexamination Certificate
2002-03-13
2003-04-01
Bradley, P. Austin (Department: 2833)
Electrical connectors
Including or for use with tape cable
For connection to rigid preformed panel circuit arrangement,...
C439S063000, C439S581000, C439S098000, C439S616000, C174S08800C
Reexamination Certificate
active
06540548
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method for separating a metallic braid from a core wire of a coaxial cable, and an apparatus thereof.
2. Description of the Related Art
Micro coaxial cables are widely used in signal transmission for its small size, high tensile strength, good performance of electrical specification and Anti-EMI (Electro Magnetic Interference).
FIGS. 1 and 2
of attached drawings show a micro coaxial cable
1
comprising an inner conductor
11
surrounded by an insulating jacket
12
, a metallic braid
13
surrounding the insulating jacket
12
and an insulating sheath
14
encompassing the coaxial cable
1
.
The electrical connection between a coaxial cable and an electrical connector is done by means of soldering or Insulation Displacement Contact (IDC) technique. The IDC technique is not proper for the micro coaxial cable, for when the insulating sheath
14
and the insulting jacket
12
are fierced through by sharpened edges of a conductive contact of an IDC type connector, both the inner conductor
11
and the metallic braid
13
are simultaneously contacted by the contact. Hence it is necessary to separate the metallic braid
13
and the inner conductor
11
before the coaxial cable is soldered to the connector. Heretofore, the cables are separated by hands in a one by one fashion, it is both time and labor consuming because the metallic braid
13
consists of a lot of copper wires, and the diameter of each wire is only about 0.025-0.05 mm. Moreover, the quality is poor when it is done purely by hands. Thus, it is necessary to provide an apparatus and method to separate the core wire from the metallic braid of a coaxial cable when the coaxial cable is connected to an electrical connector.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a method for separating the metallic braid from the core wire of a coaxial cable.
It is another object of the present invention to provide an apparatus for separating the metallic braid from the core wire of a coaxial cable in connecting the coaxial cable to a printed circuit board (PCB).
To achieve the above objects, a method in accordance with the present invention for separating a metallic braid from a core wire of a micro coaxial cable during connecting the cable to a PCB comprising the following steps: (i) extending the coaxial cable through corresponding hole formed in the PCB; (ii) stripping a predetermined length of the sheath of the coaxial cable to expose the metallic thread; (iii) providing a rotiform brush mechanism comprising a rotiform brush, a spin shaft extends through the rotiform brush and an electrical motor for urging the spin shaft and the brush to rotate, the rotiform brush comprising a circular frame and a plurality of hard brushings attached to the circular frame; (iv) moving the PCB with the stripped coaxial cable towards the rotiform brush until the coaxial cable gets contact with the brushings of the rotiform brush; (v) rotating the rotiform brush to urge the coiling threads of the metallic braid and the core wire in the rotating direction, and thus separating the braid and the core wire along a tangent direction of the rotiform brush.
Other objects, advantages and novel features of the invention will become more apparent from the following detailed description of preferred embodiment thereof when taken in conjunction with the accompanying drawings, wherein:
REFERENCES:
patent: 5829991 (1998-11-01), Murphy et al.
patent: 5931698 (1999-08-01), Kodama
patent: 6212422 (2001-04-01), Berg et al.
patent: 6371805 (2002-04-01), Wang et al.
Bradley P. Austin
Chung Wei Te
Hon Hai - Precision Ind. Co., Ltd.
Nguyen Truc
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