Communications: radio wave antennas – Antennas – With radio cabinet
Reexamination Certificate
2000-09-11
2001-07-10
Wong, Don (Department: 2821)
Communications: radio wave antennas
Antennas
With radio cabinet
C343S757000
Reexamination Certificate
active
06259410
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an antenna angle adjusting mechanism for a wireless audio/video transmitter.
2. Description of the Prior Art
With regard to an antenna for transmitting and receiving high frequency signals, it is essential that the azimuth angle and the elevation angle of the antenna may be widely adjusted so as to reduce the blind comer for transmitting and receiving signals.
FIG. 1
is an exploded perspective view showing the angle adjusting mechanism for an antenna
110
in a conventional wireless video and audio transmitter. In this case, the antenna
110
, having a connecting sleeve
111
, is connected to a casing
120
through a hollow tube
100
including three pivoting sleeves
101
,
102
and
103
which form a generally T-shaped appearance. The pivoting sleeve
101
is connected to the antenna
110
through the connecting sleeve
111
which enables the antenna
110
to rotate around the axis of the pivoting sleeve
101
of the hollow tube
100
in order to adjust the azimuth angle of the antenna
110
. The other two pivoting sleeves
102
and
103
are aligned to each other and are pivotably connected to the pivoting recess
121
of the casing
120
, which enables the hollow tube
100
to pivot relative to the casing
120
around the axis of the two pivoting sleeves
102
and
103
so as to adjust the elevation angle of the antenna
110
.
After the angle of the antenna
110
has been adjusted to a desired position, the antenna
110
must be retained at the same position so as to optimize its transmitting and receiving capability. To this end, when the above mentioned three pivoting sleeves
101
,
102
, and
103
of the hollow tube
100
are pivotably connected to the casing
120
and the antenna
110
, an O ring
105
made of resilient material such as rubber must be interposed between the connected portions for generating a damping effect to maintain the antenna
110
at a desired position after angle adjustment.
One drawback of the above mentioned prior art is that each of the three pivoting sleeves of the hollow tube
100
requires to be assembled with an O ring
105
, which causes an increased assembly costs due to increment in the time and material required for assembly.
SUMMARY OF THE INVENTION
One object of this invention is to provide an angle adjusting mechanism for an antenna, which, through its own resilience design without the necessity of installing any extra parts such as O rings, may generate a damping effect for retaining the antenna at a desired position when connecting the antenna and the casing in order to reduce the assembly cost.
Another object of this invention is to provide an angle adjusting mechanism for an antenna which includes a linking member with a bigger internal wiring space in order to ease the assembly.
Yet another object of this invention is to provide an angle adjusting mechanism for an antenna which have a linking member formed by a pair of half-housings combined together by use of tenon and mortise joint which can accurately fasten the two together when assembling.
In order to achieve the above-mentioned objects, this invention provides an angle adjusting mechanism for an antenna adapted to connect the antenna to its casing, including:
a pivoting portion provided in the casing;
a connecting sleeve provided in the antenna; and
a linking member having a hollow body, a first pivoting sleeve, a second pivoting sleeve, and a third pivoting sleeve, with the first, second and third pivoting sleeves being integrally attached to the hollow body, and with the second and third pivoting sleeves being aligned with each other and substantially perpendicular to the first pivoting sleeve to form a generally T-shape; the first pivoting sleeve being connected, at the free end thereof, to the connecting sleeve of the antenna, and the second and third pivoting sleeves being pivotably connected, at respective free end thereof, to the pivoting portion of the casing so that the antenna may be pivotably connected to the casing through the linking member;
characterized in that each of the first, second, and third pivoting sleeves of the linking member is provided with a split or slotted free end and resilient tabs for pressing against the portions connected with the first, second, and third pivoting sleeves in an assembled state so that the first, second, and third pivoting sleeves may be connected to the connecting sleeve of the antenna and the pivoting portion of the casing in a resilient manner.
Through the above construction, when the linking member is used to connect the antenna to the casing, the resilience effect of its own can provide a damping effect without installing a member for increasing frictional resistance so as to simplify the production and reduce the cost.
Furthermore, the sphere shaped hollow body of the linking member provides a bigger internal wiring space which facilitates the assembly. Besides, the linking member is formed by a pair of half-housings combined together by use of tenon and mortise joint so that the pair of half-housings can be accurately fastened together.
Other objects, advantages and characteristics of this invention will become apparent from the detailed description to follow taken in conjunction with the drawings.
REFERENCES:
patent: 5513383 (1996-04-01), Tsao
patent: 5949379 (1999-09-01), Yang
Martine & Penilla LLP
Nguyen Hoang
Tranwo Technology Corp.
Wong Don
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