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Mobile Phone Patent Abstract
A new antenna structure for a mobile phone mainly comprises an antenna
stem, a swivel joint, a high-frequency connector, and an impedance-matching
member; the swivel joint includes an antenna-mounting base, a joint-fastening
base and an outer protection sleeve; the swivel joint has a very
small height in the whole antenna structure; the swivel joint enables
the extension antenna stem to turn freely, and to bend for storage
and carrying, if necessary. The copper and spring-shaped impedance-matching
member and a copper sleeve wall of the high-frequency connector
form into an impedance-matching circuit; the impedance-matching
member is made of a standard parts without test and adjustment so
as to facilitate the assembling operation thereof, and to provide
a stable reception function.
Mobile Phone Patent Claims
I claim:
1. An antenna structure for mobile phones, comprising:
an antenna stem, a swivel joint, a high-frequency connector and
an impedance-matching member;
said swivel joint including an antenna-mounting base, a joint-fastening
base and an outer protection sleeve, said antenna-mounting base
having an upper end and a lower end;
said antenna stem being adapted to be fastened to the upper end
of said antenna-mounting base, wherein the bottom end of said antenna-mounting
base being adapted to be inserted into said joint-fastening base,
and both said antenna mounting base and said joint-fastening base
being mounted inside said outer protection sleeve, said outer protection
sleeve containing retaining means to prevent said antenna mounting
base and said joint-fastening base from being disengaged from each
other;
said high-frequency connector containing an insulation collar and
a center-needle seat fixedly mounted therein, said center-needle
seat being mounted on top of said insulation collar which insulates
said center-needle seat from said high-frequency connector, said
center-needle seat having a mounting hole formed on top thereof,
said high-frequency connector further containing a sleeve wall for
threadably sleeving about said protection sleeve;
said impedance-matching member having an upper end and a lower
end; the upper end of said impedance-matching member being fixedly
attached to the bottom of said joint-fastening base, while the lower
end thereof being inserted into said mounting hole on said center-needle
seat;
the lower end of said antenna-mounting base being shaped like a
cylindrical stud having a circumferential retaining groove for engaging
with said joint-fastening base and a circumferential flange on top
thereof for engaging with said outer protection sleeve via said
retaining means;
said joint-fastening base having a plurality of vertical slots
on its upper portion to provide contractability thereof and allow
said joint-fastening base to pivotably engage with said antenna-mounting
base, a mounting hole on its lower portion for receiving said impedance-matching
member, and a plurality of vertical slip-proof threads on the outer
surface thereof to prevent slipping and rotating with respect to
said protection sleeve;
said impedance-matching member being shaped like a spring and having
a pre-determined electric characteristic whereby said impedance-matching
member and said sleeve wall of said high-frequency connector form
a predetermined electrostatic capacitance to facilitate high frequency
transmission.
Mobile Phone Patent Description
BACKGROUND OF THE INVENTION
Mobile phones have become a popular communication equipment in
our daily life. The main body of the phone becomes smaller and smaller
in size to facilitate carrying around by a user; however, the antenna
of a mobile phone has, so for, no any improvement, such as the length
of the antenna is unable to vary and having a poor reception function,
which are deemed drawbacks thereof. Even an extension antenna is
still deemed too long to meet the requirement after being retracted
into a short one. If a connector of an antenna is added thereto,
the whole length of an antenna is still too long to carry or for
storage. The antenna might be bent at an angle of 90 degrees for
shortening its length; unfortunately, the reception function would
be affected as a result of no perfect high-frequency connector being
available, and therefore no such antenna is used. Generally, a flexible
rod antenna is used on a mobile phone, but the length of such an
antenna is still deemed too long. Since the phone signal is a high
frequency signal, the impedance-matching member has to be adjusted
and tested carefully before being installed in place; such adjusting
and testing procedures have become a bottle-neck in the assembling
line, aside from the lack of quality assurance of the impedance-matching
circuit and the reception poor result.
SUMMARY OF THE INVENTION
This invention relates to a new antenna structure of a mobile phone,
which comprises an antenna stem, a swivel joint, a high-frequency
connector and an impedance-matching member. The swivel joint includes
an antenna-mounting base, a joint-fastening base and an outer protection
sleeve, and the height thereof in the whole antenna is a low percentage.
The swivel joint and the extension antenna stem can facilitate the
antenna to turn, bend, and to retract for storage and carrying.
The impedance-matching member, which is made of copper, and the
sleeve wall of the high-frequency connector form an impedance-matching
circuit. The prime feature of the present invention is that the
drawbacks of the conventional mobile phone have been ameliorated
according to the present invention; the swivel joint that includes
the antenna-mounting base, the joint-fastening base and the outer
protection sleeve constitute only a very short length affixed to
the phone. The swivel joint and the extension antenna rod enable
the antenna to turn and to bend for facilitation of storage and
carrying. The spring-shaped impedance-matching member made of copper
and the sleeve wall of the high-frequency connector form into an
impedance-matching circuit. The spring-shaped impedance-matching
member makes the assembling procedures simple without test and adjustment,
and still can provide a stable reception result.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of an embodiment according to the
present invention.
FIG. 2 is a sectional view of the present invention.
FIGS. 3-1, 3-2 and 3-3 illustrate the assembled structure of the
swivel joint according to the present invention.
FIG. 4 illustrates an impedance-matching member (inductance coil)
in the present invention.
FIG. 5 illustrates the antenna of the present invention, being
turned and recovered conditions.
DETAILED DESCRIPTION
The present invention is further described in detail with the accompanying
drawings as follows:
Referring to FIGS. 1 and 2, the two FIGS. show a perspective view
and a sectional view of the present invention respectively. The
present invention comprises an extension antenna stem 10, a swivel
joint 20, a high-frequency connector 30, and an impedance-matching
member 40. The swivel joint 20 includes an antenna-mounting base
201, a joint-fastening base 202 and an outer protection sleeve 203.
The lower end 101 of the extension antenna stem 10 is mounted with
a lock screw 102 which is fixedly fitted in the upper end of the
antenna-mounting base 201. The lock screw 102 is rotatably in the
same direction as that of the antenna-mounting base 201 so as to
have the antenna aligned in the signal direction. The lower end
of the antenna-mounting base 201 is formed into a cylindrical stud
204 (as shown in FIG. 3-1). When the cylindrical stud 204 is pressed
downwards, the joint-fastening base 202 having four or more vertical
slots 205 (as shown in FIG. 4) will be opened slightly (as shown
in FIG. 3-2). As soon as the cylindrical stud 204 is pushed to the
bottom of the joint-fastening base 202, the fastening ring 206 of
the joint-fastening base 202 will restore to its original shape
to engage with a retaining groove 207 of the antenna-mounting base
201 so as to have the two parts fastened together. The outer surface
of the joint-fastening base 202 is furnished with a plurality of
vertical slip-proof threads 208, which can prevent the base 202
from slipping and rotating after the base being inserted inside
the outer protection sleeve 203. As soon as the antenna-mounting
base 201 is inserted into the upper part of the outer protection
sleeve 203, a fastening ring 211 on the upper end of the outer protection
sleeve 203 will be engaged with a circular flange 209 of the antenna-mounting
base 201; then, the base 201 mated with the joint-fastening base
202 and the outer protection sleeve 203 can be turned horizontally.
Since the antenna stem 10 can be turned vertically, the whole antenna
can then be turned freely in all three dimensions. The bottom of
the joint-fastening base 202 has a small hole 210 for receiving
the upper end of a spring shaped copper impedance-matching member
(an inductance coil), which is soldered in place (as shown in FIG.
4); the lower end of the impedance-matching member 40 is inserted
in a mounting hole 501 of a center-needle seat 50. The seat 50 is
mounted around with an insulation collar 60, which is then mounted
on the bottom part of a high-frequency connector 30. The insertion
method for the impedance-matching member is used in this part because
of being difficult to solder the same in place. The impedance-matching
member (inductance coil) 40 is to be made by using a method of making
a spring member according to a given specification therefor so as
to provide a standard electric characteristics desired. Between
the impedance-matching member 40 and the sleeve wall 301 of the
high-frequency connector 30, an electrostatic capacitance is establish
(shown in FIG. 2 as A and B), and can provide a high frequency transmission;
therefore, a better high frequency-matching circuit is formed for
obtaining better assembling procedures and reception result than
the conventional high-frequency connector.
In brief, the antenna according to the present invention can be
recovered and adjusted freely as a result of its special and novel
design; the antenna can be retracted into a short piece (as shown
in FIG. 5); such feature is unable to find in the conventional mobile
phone. The present invention is convenient to a user upon putting
a mobile phone in storage condition; moreover, the antenna according
to the present invention can adjusted in various directions without
affecting the reception result of the mobile phone. Since the impedance-matching
member (inductance coil) of the present invention is formed as a
spring with a uniform size, it can facilitate the assembling work
thereof without any adjustment and test. The lower end of the impedance-matching
member can simply be inserted in place, the assembling work thereof
can be done quickly and accurately. Since the impedance-matching
member and the sleeve wall can form into an electrostatic capacitance
therebetween, and provide a high frequency transmission means for
better reception result; such a structure is deemed mach superior
to the conventional structure which has only a coil.
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