L-shaped connector for connecting antenna wire

Details L-shaped connector for connecting antenna wire L-shaped connector for connecting antenna wire

2000-03-16

2001-09-04

Sircus, Brian (Department: 2839)

Electrical connectors

Including or for use with coaxial cable

Adapted to secure cables perpendicular to one another or a...

Reexamination Certificate

active

06283790

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to an L-shaped connector for connecting an antenna wire in which electrical performance can be enhanced by providing a protective case within a body case, and an assembling can be facilitated by forming a plug pin in a substantially L-shape (substantially right angle shape).
Generally, in image or acoustic equipment such as televisions, video tape recorders and stereos, or in electronic equipment such as personal computers, inputting and outputting of a picture signal or a sound signal is effected, for example, by using a cable with an electrical connector of a plug pin type. However, in such electronic equipment, recently, since a band of a signal used has been extended to a high output voltage and high frequency band, great electromagnetic waves generated from the electronic equipment reach the cable to affect a bad influence upon the signal being transmitted by the cable, which may cause inconveniences such as distortion of a video tape recorder signal, distortion of a television image, occurrence in noise in the stereo or malfunction of the personal computer.
Further, particularly in television broadcasting, recently, not only BS broadcasting but also CS broadcasting have been utilized. In the former, electromagnetic frequency is presently 1.2 to 1.8 GHz in analogue (1.8 GHz in digital will be expected in the future), and, in the latter, electromagnetic frequency is presently about 1.9 GHz in analogue. Particularly, also in high frequency in the latter case, in order to avoid an influence of electromagnetic radiation, a connector having higher shielding ability is now requested.
In order to prevent the bad influence of the electromagnetic radiation, there has mainly been used a cable of a so-called coaxial cable type in which not only a central conductive wire for transmitting a signal (referred to as “core wire” hereinafter) is covered by a first insulation material but also the insulation material is further covered by a coaxial shield cover for shielding or cutting the electromagnetic radiation, and the shield cover is covered by a second insulation material.
By the way, in the arrangement of the above-mentioned connector, normally, the core wire of the cable is electrically connected to a plug pin supported by a resin plug pin support, and the cable and the plug pin support are housed in a metallic body case, and an outer surface of the metallic body case is coated with resin by molding.
When the connector is not straight but has an L-shape, the core wire of the cable is formed in the form of the L-shape, i.e., is bent at a substantially right angle at an end thereof, which is in turn electrically connected to the plug pin and the assembly is housed in the metallic body case.
However, in comparison with the case where the straight cable and plug pin support are housed, when the right angled cable and plug pin support are housed, since the metallic body case itself must have a complicated L-shaped structure, after the parts are housed in the body case, there is apt to exist any clearances or voids for undesired communication between an interior and an exterior of the body case.
{circle around (1)} Accordingly, when the outer surface of the body case is subsequently covered with resin by molding, a part of the molded resin may enter the body case through the voids to cause electrical bad influences such as deterioration of impedance matching.
{circle around (2)} Further, since the body case itself has the complicated L-shaped structure, when the cable is housed within the body case, the body case may be deformed to compress and deform the cable, thereby causing similar electrical bad influences.
{circle around (3)} In addition, in the L-shaped connector, when an operation for bending the core wire of the coaxial cable to the L-shape is effected, since the working space itself is relatively small, the L-shaped bending operation becomes difficult.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an L-shaped connector for connecting an antenna wire in which, since an L-shaped (substantially right angled) electrically connected portion is housed in a cylindrical protective case (
6
) previously housed in a body case, a part of molded resin on an outer surface of the body case does not enter the cylindrical protective case (
6
).
Another object of the present invention is to provide an L-shaped connector in which, since an L-shaped bent portion of a cable is previously housed in a cylindrical protective case (
6
) to be protected, when the cable is housed in a body case, even if the body case is deformed, the cable is not compressed and deformed.
A further object of the present invention is to provide an L-shaped connector in which an assembling can be facilitated by previously forming a plug pin itself into an L-shape and by connecting a straight core wire of a coaxial cable to the L-shaped plug pin as it is.
A still further object of the present invention is to provide an L-shaped connector in which, since a core wire of a coaxial cable is straight, the coaxial cable itself may not be distorted to generate any force for bending the core wire.
To achieve the above objects, according to a first aspect of the present invention, there is provided an L-shaped connector (
1
) for connecting an antenna wire (
7
) to an image or acoustic equipment. The L-shaped connector (
1
) has a coaxial core wire (
9
), a shield cover (
10
) and primary and secondary insulation coating materials (
11
,
12
). The L-shaped connector (
1
) comprises a substantially L-shaped metallic body case (
2
) having a horizontal portion (
2
a
), a vertical portion (
2
d
) and at least one leg portion (
2
e
). A metallic tip end side cylindrical case (
3
) is fitted to the horizontal portion (
2
a
) of the body case (
2
). A plug pin support (
4
) is made of insulation material and is attached within the horizontal portion (
2
a
) of the body case (
2
). A metallic plug pin (
5
) is horizontally inserted into and attached to the plug pin support (
4
). And, a cylindrical protective case (
6
) is comprised of a pair of cylindrical halves (
6
A,
6
B), made of insulation material, and is housed in the vertical portion (
2
d
) of the body case (
2
). At least the core wire (
9
) of the antenna wire (
7
) is vertically passed through the cylindrical protective case (
6
) to be electrically connected to the plug pin (
5
), and the cylindrical protective case (
6
) is held within the body case (
2
) by bending the at least one leg portion (
2
e
) of the body case.
Preferably, at least an upper surface portion and side surface portions of the cylindrical protective case (
6
) are closely fitted within the interior of the body case (
2
) so that there is no void or clearance for communicating between the exterior of the body case (
2
) and the interior of the protective case (
6
).
Preferably, an upper end (
11
a
) of at least the primary insulation coating material (
11
) of the coaxial cable or antenna wire (
7
) is housed in the protective case (
6
).
Preferably, the at least one leg portion (
2
e
) is bent along the circumference of the protective case (
6
) through a predetermined distance (m) in a vertical direction at a lower end of the protective case (
6
).
Preferably, the pair of cylindrical halves (
6
A,
6
B) of the protective case (
6
) are molded from ABS resin.
Preferably, the plug pin (
5
) has a cylindrical engagement portion (
5
b
) at its one end, and the plug pin (
5
) and the core wire (
9
) are engaged to each other to be electrically interconnected by caulking the engagement portion (
5
b
) when a tip end portion of the core wire (
9
) is inserted into the cylindrical engagement portion (
5
b
).
Preferably, at least one (
6
A) of the pair of cylindrical halves (
6
A,
6
B) of the protective case (
6
) has a through hole (
6
d
) at its predetermined position, and a substantially right-angled bent end portion (
9
a
) of the core wire (
9
) is engaged by the engagement portion (
5
b
) of the plug pin (
5
) through

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