Telecommunications – Transmitter and receiver at same station – Having particular housing or support of a transceiver
Reexamination Certificate
1999-06-17
2001-04-24
Maung, Nay (Department: 2681)
Telecommunications
Transmitter and receiver at same station
Having particular housing or support of a transceiver
C455S347000
Reexamination Certificate
active
06223023
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a transmitter-receiver unit for a portable telephone and more particularly to a transmitter-receiver unit for a portable telephone which is applicable to both a right-hand antenna type portable telephone and a left-hand antenna type portable telephone.
2. Description of the Related Art
With reference to drawings, a description will be given below of a right-hand antenna type portable telephone using a conventional transmitter-receiver unit for a portable telephone.
FIG. 5
is a sectional view of a right-hand antenna type portable telephone using a conventional transmitter-receiver unit for a portable telephone,
FIG. 6
is a plan view of a principal portion thereof,
FIG. 7
is an exploded perspective view thereof, and
FIG. 8
is a sectional view thereof.
As shown in
FIGS. 5
to
8
, a case
21
is formed in a generally box shape by molding using a synthetic resin and it comprises side walls
21
a
as surrounding walls, as well as a surface wall
21
b
and a back wall
21
c
which close the upper and lower sides, respectively, of the space defined by the side walls.
A mother board
22
is formed in the shape of a flat plate using an insulating resin material. On the mother board are mounted electronic components (not shown) such as a memory element for the storage of telephone numbers, etc. and an arithmetic element for carrying out various arithmetic operations, as well as a male connector
22
a
having a plurality of terminals. The mother board
22
is disposed within the case
21
in proximity to the back wall
21
c
and is secured to the case
21
by a suitable means.
An antenna
24
is formed in a generally cylindrical shape using, for example, a magnetic material and it is for the transmission and reception of, for example, voice signals. The antenna
24
has a rod-like antenna portion
24
a
capable of being drawn out to the exterior, a knob portion
24
b
formed at the tip of the antenna portion
24
a
, and a cylindrical portion
24
c
for receiving the antenna portion
24
a
therein.
In the antenna
24
, the knob portion
24
b
of the antenna portion
24
a
is disposed on the right-hand side of the case
21
in an outwardly projecting state and the cylindrical portion
24
c
which accommodates the antenna portion
24
a
therein is disposed inside the case
21
and in proximity to the right-hand side wall
21
a.
A transmitter-receiver unit
25
for a portable telephone has a flat plate-like printed wiring board
26
and a generally box-shaped frame
27
for holding the printed wiring board
26
.
The printed wiring board
26
is provided on a first side (for example, the surface) thereof with electric components
26
a
such as crystal oscillator and coil, an antenna terminal member
26
b
connected to the antenna
21
and formed at a right-hand corner position, an antenna duplexer
26
g
connected to the antenna terminal member
26
b
, and a wiring pattern (not shown) of a desired shape. The printed wiring board
26
is also provided on a second side (for example, the back) thereof with electric components
26
d
such as an integrated circuit (LSI), a chip resistor and a chip capacitor, a female connector
26
c
having a plurality of terminals (not shown), and a wiring pattern (not shown) of a desired shape.
With the electric components
26
a
,
26
d
and the wiring pattern (not shown) there are constituted a transmission circuit block (not shown) which outputs to the antenna
24
a transmission signal for transmitting a signal of voice and the like from the antenna and a reception circuit block (not shown) which receives a reception signal from the antenna
24
and outputs a voice signal on the basis of the reception signal. Both the transmission circuit block and the reception circuit block are connected to the antenna duplexer
26
g
. A connecting terminal (not shown) of the antenna
24
is connected, for example by soldering, to the antenna terminal member
26
b
formed at a right-hand corner position of the printed wiring board
26
.
The frame
27
is formed in a generally box shape by cutting and bending a metallic flat plate and it comprises side walls
27
a
as surrounding walls, a bottom wall
27
b
which closes the lower surface side, and a receptacle portion whose upper surface side is open. In the bottom wall
27
b
is formed a rectangular hole
27
d.
The printed wiring board
26
is mounted and held in the receptacle portion
27
c
of the frame
27
with use of a suitable means. In this state, the board
26
is located in proximity to the bottom wall
27
b
, and the female connector
26
c
is inserted into the hole
27
d
of the bottom wall
27
b.
The transmitter-receiver unit
25
having the printed wiring board
26
and the frame
27
is placed on the mother board
22
.
In this state, the male connector
22
a
of the mother board
22
and the female connector
26
c
of the printed wiring board
26
are electrically connected with each other. Further, the antenna
24
and the transmitter-receiver unit
25
are located adjacent each other on the mother board
22
.
The following description is now provided about a left-hand type portable telephone using the conventional transmitter-receiver unit.
In this left-hand antenna type portable telephone, an antenna is disposed on the right-hand side of a case and an antenna terminal member of a printed wiring board is disposed at a left-hand corner position of the same board, the antenna and the antenna terminal member being connected with each other.
As described above, in the right-hand antenna type portable telephone using the conventional transmitter-receiver unit for a portable telephone, the antenna mounted on the right-hand side of the case and the antenna terminal member disposed at a right-hand corner position of the printed wiring board are connected with each other, and the female connector disposed on the second side (for example, the back) of the printed wiring board and the male connector disposed on the mother board are connected with each other.
However, both the right-hand antenna type portable telephone and the left-hand antenna type portable telephone as a type contrast thereto are popular. In the transmitter-receiver unit used in the left-hand antenna type portable telephone, the antenna is disposed on the left-hand side of the portable telephone, so that the antenna terminal member of the printed wiring board in the transmitter-receiver unit is required to be located at left-hand corner position of the printed wiring board and design is made to meet the requirement.
Thus, in the conventional transmitter-receiver unit for a portable telephone, since the antenna terminal member for the printed wiring board in the left-hand antenna type portable telephone is disposed at a left-hand corner position, separate such transmitter-receiver units are designed, one for the right-hand antenna type portable telephone and the other for the left-hand antenna type portable telephone.
This is because the foregoing construction of the transmitter-receiver unit for the right-hand antenna type portable telephone is not directly applicable to the transmitter-receiver unit for the left-hand antenna type portable telephone in which the antenna terminal member is disposed at a left-hand corner position of the transmitter-receiver unit.
It follows that the transmitter-receiver units for the right and left antenna type portable telephones are required to be designed as separate units, thus giving rise to the problem that the number of design steps increases.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a transmitter-receiver for a portable telephone capable of solving the above-mentioned problems and capable of being used for both right and left antenna type portable telephones.
The transmitter-receiver unit for a portable telephone according to the present invention comprises: a printed wiring board having a plurality of wiring patterns and a connector connecting portion connected to the wiring pat
Kikuchi Jiro
Saito Yoshio
Urabe Satoshi
Alps Electric Co. ,Ltd.
Brinks Hofer Gilson & Lione
Maung Nay
Vuong Quochien B.
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