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Mobile Phone Patent Abstract
A 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 a connector
having two hooks. 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 connector is
adapted to insert into an antenna jack on a mobile phone to contact
with a conductive leaf spring in the mobile phone, and the two hooks
of the connector are adapted to firmly hold the whole antenna to
the mobile phone.
Mobile Phone Patent Claims
What is claimed is:
1. A dual-frequency antenna for 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 a connector at a lower end of said main body, a portion
of said main body between said wave coil and said connector being
stamped at two sides to provide two downward and outward extended
arms, and said connector being formed at two sides with two hooks;
and
said cover being made of an insulating plastic material, a curvature
of an inner wall of said cover matching with that of said curved
wave coil, and a radially inward projected stop ring being provided
around the inner wall of said cover at a predetermined position;
said main body being positioned in said cover from a bottom opening
of said cover, such that said curved wave coil at the upper end
of said main body is located in said cover and said two arms at
two sides of said main body pass said stop ring to resiliently press
against an upper surface of said stop ring; and
said connector at the lower end of said main body being adapted
to insert into an antenna jack provided on a mobile phone to contact
with a conductive leaf spring provided in said mobile phone for
said mobile phone to accurately receive signals, and said two hooks
provided at two sides of said connector being adapted to pass said
antenna jack and abut against an inner wall of said mobile phone
to prevent said main body from moving back out of said antenna jack
and accordingly said mobile phone.
2. A dual-frequency antenna for mobile phone as claimed in claim
1, wherein said curved wave coil includes horizontal wave segments
and vertical wave segments adapted to two different frequencies
of 900 MHz and 1800 MHz, respectively.
3. A dual-frequency antenna for mobile phone as claimed in claim
1, further comprises two pressing plates formed above said two hooks
at two sides of said connector by stamping portions of said connector
integrally extended from said hooks, and two holes formed on said
cover corresponding to said two pressing plates for said two pressing
plates to partially expose from said two holes.
Mobile Phone Patent Description
BACKGROUND OF THE INVENTION
The present invention relates to a dual-frequency antenna for mobile
phone, and more particularly to a dual-frequency antenna formed
from an integrally stamped thin metal conductor to enable quick
connection of the antenna at a lower connector to a mobile phone
and accurate controlling of the antenna frequencies.
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 dual-frequency antenna for mobile phone in which an integrally
stamped thin metal conductor is included 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 a connector
having two hooks. 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 connector is
adapted to insert into an antenna jack on a mobile phone to contact
with a conductive leaf spring in the mobile phone, and the two hooks
of the connector are adapted to firmly hold the whole antenna to
the mobile phone.
Another object of the present invention is to provide a dual-frequency
antenna that could be quickly and removably connected to a mobile
phone. The antenna has a main body made of an integrally stamped
thin metal conductor. A lower end of the main body forms a connector
having two hooks provided at two sides thereof and two resilient
pressing plates located above the two hooks and partially exposed
from holes provided on a cover closing the main body. When the antenna
is connected to a mobile phone, the two hooks abut against an inner
wall of the mobile phone and hold the antenna to the phone. By depressing
the two pressing plates, the two hooks are radially inward moved
to separate from the inner wall of the mobile phone and thereby
allow removal of the antenna from the mobile phone easily.
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
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 dual-frequency antenna for
mobile phone according to the present invention;
FIG. 4 is an assembled sectional view of the dual-frequency antenna
of FIG. 3 before connecting to a mobile phone;
FIG. 5 is an assembled sectional view of the dual-frequency antenna
of FIG. 3 having been connected to a mobile phone;
FIG. 6 is an exploded perspective of a dual-frequency antenna for
mobile phone according to another embodiment of the present invention;
and
FIG. 7 is an assembled sectional view of the dual-frequency antenna
of FIG. 6 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 dual-frequency
antenna for mobile phone according to a first embodiment of 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 a connector 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 portion of the main body
1 between the wave coil 11 and the connector 12 is stamped at two
sides to provide two downward and outward extended arms 13. The
connector 12 is formed at two sides with two hooks 121.
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. A radially inward projected stop ring 21 is provided
around the inner wall of the cover 2 at a predetermined position.
Please refer to FIGS. 4 and 5. 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 passes the stop ring 21 to locate in the cover 2 and the two arms
13 resiliently press their lower ends against an upper surface of
the stop ring 21, 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 connector 12 at
the lower end of the main body 1 is inserted into an antenna jack
31 provided on the mobile phone 3 until the two hooks 121 pass the
antenna jack 31 to abut against an inner wall of the mobile phone
3 and prevent the whole antenna from moving back out of the antenna
jack 31. At this point, the connector 12 contacts with a conductive
leaf spring 32 provided in the mobile phone 3 to quickly complete
the assembling of the antenna to the mobile phone 3 and enable the
mobile phone 3 to accurately receive signals of any one of two different
frequencies of 900 MHz and 1800 MHz.
Please now refer to FIGS. 6 and 7 in which a dual-frequency antenna
for mobile phone according to another embodiment of the present
invention is shown. In this embodiment, the antenna further includes
two pressing plates 122 provided above the two hooks 121 of the
connector 12 also through stamping, so that the two pressing plates
122 are portions integrally extended from the hooks 121. Meanwhile,
the cover 2 is also provided on its wall with two diametrically
opposite holes 22 corresponding to the two pressing plates 122,
so that the pressing plates 122 partially expose from the holes
22 after the main body 1 is inserted into the cover 2. When the
antenna of this second embodiment of the present invention is assembled
to the mobile phone 3, it could be quickly removed from the mobile
phone 3 simply by applying a force on the two exposed pressing plates
122 to cause the two hooks 121 to move radially inward and separate
from the jack 31. This design enables the antenna of the present
invention to meet the requirement of some mobile phone manufacturers
for an antenna to removably mount on the mobile phone 3. |