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Mobile Phone Patent Abstract
A simplified dual-frequency antenna for mobile phone includes an
integrally stamped thin metal conductor to function as a frequency-control
structure of the antenna. An upper end of the stamped thin metal
conductor is a curved wave coil and a lower end thereof is an elongated
contact head. The curved wave coil includes horizontal and vertical
wave segments adapted to two different frequencies of 900 MHz and
1800 MHz, respectively. A cover encloses the curved wave coil to
protect the coil against impact and deformation. The contact head
has a stop ring mounted around a lower portion thereof and adapted
to tightly fit in a lower opening of the cover. The stop ring is
integrally provided at a predetermined distance below it with a
bolt. By screwing the bolt into an antenna jack on a mobile phone,
the antenna is removably connected to the mobile phone with a lower
end of the contact head contacting with a conductive leaf spring
in the mobile phone, enabling the mobile phone to receive signals.
Mobile Phone Patent Claims
What is claimed is:
1. A simplified dual-frequency antenna for a mobile phone, comprising
a main body and a cover; said main body being made of a thin metal
conductor that is integrally stamped into a desired shape to include
a curved wave coil at an upper end and an elongated contact head
at the lower end of said main body; said curved wave coil including
horizontal wave segments and vertical wave segments adapted to two
different frequencies of 900 MHz and 1800 MHz, respectively; and
said elongated contact head at the lower end of said main body having
a stop ring mounted around a lower portion thereof, said stop ring
being integrally provided at a predetermined distance below it with
a bolt adapted to screw into an antenna jack provided on a mobile
phone; and said cover being made of an insulating plastic material
and having a shape suitable for protectively enclosing said curved
wave coil of said main body therein with said stop ring tightly
fitted in a lower opening of said cover; whereby when said elongated
contact head is inserted into said antenna jack on said mobile phone
and said bolt is fully screwed into said antenna jack, said main
body protectively enclosed by said cover is quickly and removably
connected to said mobile phone with a lower end of said contact
head contacting with a conductive leaf spring provided in said mobile
phone, enabling said mobile phone to accurately receive signals.
2. The dual-frequency antenna as recited in claim 1, further comprising
open spaces provided between at least some of the horizontal wave
segments of the curved wave coil, such that the main body is open
between the at least some horizontal wave segments.
3. The dual-frequency antenna as recited in claim 1, further comprising
open spaces provided adjacent the vertical wave segments of the
curved wave coil, such that the main body is open at side portions
opposed to the vertical wave segments.
4. The dual-frequency antenna as recited in claim 1, wherein the
horizontal wave segments and the vertical wave segments are formed
when the main body is stamped and wherein the main body in the region
of the wave segments is curved about an axis and wherein the curved
portion of the main body fails to extend completely around the axis
such the one side of the main body is out of contact with another
side of the main body.
5. The dual-frequency antenna as recited in claim 1, wherein the
upper end of the main body at the curved wave coil partially surrounds
an open space.
Mobile Phone Patent Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a simplified dual-frequency antenna
for mobile phone, and more particularly to a simplified dual-frequency
antenna that has a stop ring with a lower bolt provided at a lower
end thereof to enable quick and removable connection of the antenna
to a mobile phone by screwing the lower bolt into an antenna jack
on the mobile phone.
2. Description of the Related Art
FIGS. 1 and 2 are exploded and assembled perspective views, respectively,
of a conventional antenna for mobile phone. The conventional antenna
for mobile phone mainly includes two spring coils 10, 20 having
large and small coil sizes, respectively, for putting around outer
and inner wall surfaces, respectively, of a hollow insulting sleeve
30, and a link 40 connected to a bottom of the sleeve 30. The sleeve
30 is then covered with a protective casing (not shown). Through
frequency matching and selection for the two spring coils 10, 20
at outer and inner sides of the insulating sleeve 30, the antenna
is adapted to use with a dual-frequency mobile phone.
The spring coils 10, 20 are usually ready-made products. They are
manufactured by winding wires around dies and manually adjusting
the dies from time to time for the resultant spring coils 10, 20
to meet required specifications, including wire gauge for forming
the spring coil, the coil size, the coil spacing, and the length
of the coil. It is possible to effectively control such specifications
when there is only a small quantity of spring coils to be produced
through a die. However, when a large quantity of spring coils 10,
20 are produced, there would be difference in the specifications
of the spring coils 10, 20 produced in different batches due to
offset or deformation of dies having been used for a long time and
some factors that could not be fully overcome in the manufacturing
process. Spring coils 10, 20 that do not uniformly meet all the
required specifications would inevitably adversely affect the accuracy
of the antenna frequency. Moreover, the spring coils 10, 20 tend
to compress and tangle with one another and become deformed during
packing and transportation. The spring coils are subject to deformed
coil spacing when an operator careless pulls the spring coils, making
the antenna using these deformed coil springs failed to match the
selected frequencies and resulted in poor signal receiving.
The conventional antenna for mobile phone also includes complicate
components and requires multiple steps to assemble the antenna and
therefore need higher manufacturing costs.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide
a simplified dual-frequency antenna that could be easily protected
with a cover and quickly and removably connected to a mobile phone.
To achieve the above and other objects, the simplified dual-frequency
antenna for mobile phone of the present invention includes an integrally
stamped thin metal conductor to function as a frequency-control
structure of the antenna. An upper end of the stamped thin metal
conductor is a curved wave coil and a lower end thereof is an elongated
contact head. The curved wave coil includes horizontal and vertical
wave segments adapted to two different frequencies of 900 MHz and
1800 MHz, respectively. A cover encloses the curved wave coil to
protect the coil against impact and deformation. A stop ring with
a lower bolt is mounted around a lower portion of the elongated
contact head, such that the stop ring is tightly fitted in the cover
with the lower bolt exposed from a lower opening of the cover. The
lower bolt is adapted to screw into an antenna jack on a mobile
phone for a lower end of the elongated contact head to contact with
a conductive leaf spring in the mobile phone and for the whole dual-frequency
antenna to quickly and removably connect to the mobile phone.
Further scope of applicability of the present invention will become
apparent from the detailed description given hereinafter. However,
it should be understood that the detailed description and specific
examples, while indicating preferred embodiments of the invention,
are given by way of illustration only, since various changes and
modifications within the spirit and scope of the invention will
become apparent to those skilled in the art from this detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
The structure and the technical means adopted by the present invention
to achieve the above and other objects can be best understood by
referring to the following detailed description of the preferred
embodiments and the accompanying drawings, wherein
The structure and the technical means adopted by the present invention
to achieve the above and other objects can be best understood by
referring to the following detailed description of the preferred
embodiments and the accompanying drawings which are given by way
of illustrating only, and thus are not limitative of the present
invention, wherein:
FIG. 1 is an exploded perspective of a conventional dual-frequency
antenna for mobile phone;
FIG. 2 is an assembled perspective of the conventional dual-frequency
antenna of FIG. 1;
FIG. 3 is an exploded perspective of a simplified dual-frequency
antenna for mobile phone according to the present invention;
FIG. 4 is an assembled sectional view of the simplified dual-frequency
antenna of FIG. 3 before connecting to a mobile phone;
FIG. 5 is an assembled perspective of the simplified dual-frequency
antenna of FIG. 3 before connecting to a mobile phone; and
FIG. 6 is an assembled sectional view of the simplified dual-frequency
antenna of FIG. 3 having been connected to a mobile phone.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Please refer to FIG. 3 that is an exploded perspective of a simplified
dual-frequency antenna for mobile phone according to the present
invention. As shown, the antenna mainly includes a main body 1 and
a cover 2.
The main body 1 is made of a thin metal conductor that is integrally
stamped into a desired shape to include a curved wave coil 11 at
an upper end thereof and an elongated contact head 12 at a lower
end thereof. The curved wave coil 11 includes horizontal wave segments
111 and vertical wave segments 112 adapted to two different frequencies
of 900 MHz and 1800 MHz, respectively. A stop ring 13 is mounted
around a lower portion of the elongated contact head 12 and has
a bolt 131 integrally provided at a predetermined distance below
it.
The cover 2 is made of an insulating plastic material. A curvature
of an inner wall of the cover 2 matches with that of the curved
wave coil 11.
The stop ring 13 is made of a material the same as that for making
the cover 2 and has an external diameter equal to an inner diameter
of the cover 2.
Please refer to FIGS. 4, 5 and 6. In assembling the antenna of
the present invention to a mobile phone 3, the main body 1 is forward
extended into the cover 2 from a bottom opening of the cover 2,
so that the curved wave coil 11 at the upper end of the main body
1 is completely located in the cover 2 and the stop ring 13 is tightly
fitted in the cover 2 with a lower surface of the stop ring 13 flushing
with the bottom opening of the cover 2, enabling the main body 1
to firmly associate with the cover 2. The cover 2 protects the curved
wave coil 11 therein against impact and deformation. Thereafter,
the associated main body 1 and cover 2 is connected to the mobile
phone 3 by fully screwing the bolt 131 into an antenna jack 31 provided
on the mobile phone 3. At this point, the contact head 12 extends
into the antenna jack 31 and contacts with a conductive leaf spring
32 provided in the mobile phone 3, enabling the mobile phone 3 to
accurately receive signals of any one of two different frequencies
of 900 MHz and 1800 MHz.
The invention being thus described, it will be obvious that the
same may be varied in many ways. Such variations are not to be regarded
as a departure from the spirit and scope of the invention, and all
such modifications as would be obvious to one skilled in the art
are intended to be included within the scope of the following claims.
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