JP2001168982A - Charger with antenna and portable phone using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable phone, in which an incoming call can surely arrive with high expectation, even in the case that a charger with an antenna installed in the middle of a building is used for charging. SOLUTION: When the portable phone 20 is fixed to a prescribed position of the charger 10 with an antenna that charges a phone battery 23 of the portable phone 20 and is provided with an external antenna 41, in addition to a built-in antenna 21 of the portable phone 20, the external antenna 41 is connected to a wireless circuit 24 through a changeover switch 27 of the portable phone 20, and the built-in antenna 21 is disconnected from the wireless circuit 24. Furthermore, when the portable phone 20 is fixed to the prescribed position of the charger 10, a coupling notice section 17 and a coupling detection section 26 transmits/receives a coupling signal to inform normal coupling and the coupling detection section 26 controls the changeover switch 27, so as to maximally enhance the performance of the antenna and to avoid the situation where the incoming call is received, while the antenna is set to an incomplete state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charger with an antenna for charging a secondary battery built in a mobile phone and a mobile phone for charging the built-in secondary battery using the charger. The present invention relates to a charger with an antenna that can reliably receive an incoming call even while charging with a charger, and a mobile phone using the same.

[0002]

2. Description of the Related Art In order to recharge a battery which is a secondary battery such as a mobile phone, a charging apparatus or a charger for fixing and connecting a mobile phone is used as a charging apparatus.
Such a charger is generally installed indoors such as an office or home. Therefore, when the mobile phone user is near the charger, the mobile phone is charged, for example, fixed to the charger without wearing the mobile phone, and can receive an incoming call in such a state.

On the other hand, built-in antennas for mobile phones and the like
It is designed to be used near the human ear, and is designed to improve the antenna radiation characteristics when the human head is in the immediate vicinity of the antenna. However, while the mobile phone is being charged by being fitted into the charger, a charger including metal is in proximity to the mobile phone in place of the head of the person, and thus is used by a person. The state deviates from the optimal antenna characteristic, and the performance of the antenna of the mobile phone cannot be fully exhibited.

[0004] When an incoming call is received in this state, the provision of the antenna in the charger not only eases the restrictions on the environment of the antenna, but also allows the antenna to be adapted to the environment, thereby improving the performance of the antenna. it can.

Conventionally, in this type of charger with an antenna,
For example, there is a charging device disclosed in Japanese Utility Model Laid-Open Publication No. 61-195132.

[0006] This charging device has a mounting portion on which the head of the rod antenna contracted by the mobile phone is mounted, and an auxiliary antenna electrically connected to the mounting portion. Have improved reception sensitivity.

[0007]

In the above-described conventional charger with an antenna and a portable telephone using the same, the charger is generally installed indoors, such as an office or a house, but not in modern buildings. Materials that block radio waves, such as steel and reinforced concrete, are often used. Therefore, in the charger with the antenna installed in the center of the building, even with the charging device disclosed in the above publication, the antenna is fixed to the charging device and connected to the built-in antenna of the mobile phone. Good electric field strength is not always obtained,
There is a problem that a reliable incoming call cannot be expected.

An object of the present invention is to solve such a problem, and to provide a charger with an antenna which can reliably receive an incoming call of a mobile phone even when charging with a charger with an antenna installed in the center of a building. An object of the present invention is to provide a mobile phone using the same.

[0009]

SUMMARY OF THE INVENTION A charger with an antenna according to the present invention charges a secondary battery incorporated in a portable telephone, and is arranged at a position where a good electric field strength can be obtained and connected by a conductive path. And an antenna coupling unit for connecting the external antenna to a wireless circuit of the mobile phone by a circuit different from a built-in antenna built in the mobile phone.

On the other hand, a portable telephone according to the present invention charges a built-in secondary battery using a charger with an antenna, and comprises an external antenna coupling portion coupled to an external antenna of the charger with an antenna, A changeover switch for switching between the external antenna coupling portion and the built-in antenna of the telephone and connecting to a wireless circuit.

Therefore, the external antenna connected to the charger can obtain a sufficient electric field strength by being installed outside the building or on the roof, while a portable telephone has a changeover switch when the external antenna is connected. The built-in antenna can be separated from the mobile phone. As a result, antenna characteristics can be maximized by the independent external antenna.

The above-described antenna coupling portion of the charger includes a metal connector that obtains electrical continuity by fitting, an inductance component that transmits energy by electromagnetic coupling, or an energy transmission using an electrostatic field and an electric field. It can be configured with any one of the capacitance components to be performed. Furthermore, a coupling notification unit that outputs at least one of a coupling signal when the mobile phone is fixed at a predetermined position and a charging signal when supplying a charging current to the mobile phone may be provided.

Further, the external antenna coupling portion of the above-mentioned portable telephone is a metal connector that matches the antenna coupling portion of the charger with the antenna and obtains electrical conduction by fitting, and an inductance that transmits energy by electromagnetic coupling. Any one of a component and a capacitance component that transmits energy by an electric field using capacitance can be used. Further, a coupling detecting unit for detecting that the battery charger is coupled to the charger with the antenna for charging may be provided.

The changeover switch can disconnect an internal antenna and connect an external antenna to the radio circuit while the coupling detection unit detects that the charger with the antenna is coupled, and The connection detection unit detects the connection by receiving, from the charger with the antenna, at least one of a connection signal indicating that the mobile phone is connected at a predetermined position and a charging signal indicating that the charging circuit is operating. be able to.

Further, this switching may be performed manually, but in order to avoid an erroneous operation, the portable telephone can be completely connected to the charger with the antenna and charged, and at the same time, the external antenna can be connected to the radio circuit. As a result, it is possible to avoid a situation where an incoming call is received in an incomplete state of the antenna.

[0016]

Next, embodiments of the present invention will be described with reference to the drawings. In the drawings referred to, only parts related to the present invention are shown, and parts that are not relevant are omitted.

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention. In FIG. 1, a charger 10 with an antenna, a mobile phone 2
0 and an external antenna 41 are shown. First,
The features of the charger 10 and the mobile phone 20 will be described.

The charger 10 includes an antenna connector 15 for connecting an external antenna 41 in addition to a mobile phone fixing portion 11 for fixing the mobile phone 20 and a power supply connector 12 for charging a secondary battery of the mobile phone 20. By connecting the external antenna 41 via the antenna connector 15, a charger with an antenna is obtained.

The mobile phone 20 has a changeover switch 27 for switching the built-in antenna 21 to the external antenna 41.

The external antenna 41 is installed, for example, on the roof of a building or near a window, and is connected to the antenna connector 15 of the charger 10 by an antenna connector 43 connected by a cable 42 that is a conductive path.

Next, the details of the present invention will be described with reference to FIGS. FIG. 2 is a functional block diagram showing one embodiment of the present invention in FIG.

As shown in the figure, the charger 10 includes a mobile phone fixing section 11, a power supply connector 12, a charging control circuit 1
3, an electrode terminal 14, an antenna connector 15, an antenna coupling section 16, and a coupling notifying section 17. The mobile phone 20 includes a built-in antenna 21 and a power receiving electrode 2.
2, a telephone battery 23, a wireless circuit 24, an external antenna coupling unit 25, a coupling detection unit 26, and a changeover switch 27.

The commercial power source is taken in by a plug connector 31 at one end of a power cord, and is connected to the power connector 12 of the charger 10 by a power connector 32 at the other end.

The mobile phone fixing section 11 is provided with a mobile phone 20.
Even if the mobile phone 20 is lightweight and cannot secure a sufficient bonding strength only by its own weight, the power receiving electrode 22 of the mobile phone 20 is inserted into the electrode terminal 14 and fixed, and the connection of the charging circuit is ensured. The power connector 12 can take in commercial power (100 V AC in Japan) through the plug connector 31 by inserting the power connector 32 of the power cord.

The charging control circuit 13 converts the commercial power received through the power connector 12 into a charging current for the telephone battery 23 of the mobile phone 20 as a secondary battery, and receives the power of the mobile phone 20 through the electrode terminal 14. It is to be supplied to the telephone battery 23 via the electrode 22.

The antenna connector 15 is connected to the external antenna 4
1 can be connected to the antenna coupling section 16 by inserting an antenna connector 43 attached to the end where the cable 1 is pulled in by a cable 42. Antenna coupling part 1
Numeral 6 couples with the external antenna coupling unit 25 of the mobile phone 20 to transmit and relay an RF (Radio Frequency) signal transmitted and received between the external antenna 41 and the mobile phone 20. The coupling portion of the antenna may be of a plug jack type by insertion as described above, but another specific example will be described later with reference to FIG.

Further, the coupling notifying section 17 takes out a charging signal from the charging control circuit 13 when the charging control circuit 13 receives a commercial power supply and supplies a normal charging current to the mobile phone 20, for example. The signal is sent to the connection detection unit 26 of the mobile phone 20 as a signal. With this notification, the changeover switch 27 is controlled, and the connection with the wireless circuit 24 is switched from the built-in antenna 21 to the external antenna 41. A specific example of the combined signal will be described later with reference to FIG.

The built-in antenna 21 of the mobile phone 20 is connected to a radio circuit 24 via a changeover switch 27.
The power receiving electrode 22 secures the mobile phone 20 by inserting the electrode terminal 14 of the charger 10, and receives a charging current received from the charger 10 as a secondary battery of the telephone battery 2.
Connect to 3. The wireless circuit 24 receives an RF signal received by the built-in antenna 21 of the mobile phone 20 or the external antenna 41 connected via the external antenna coupling unit 25 via the changeover switch 27.

The coupling detecting section 26 controls the changeover switch 27 by contacting the coupling notifying section 17 of the charger 10 and receiving the coupling signal to connect the external antenna 41 to the radio circuit 24 instead of the built-in antenna 21. And Also,
The changeover switch 27 is controlled by the coupling detecting unit 26 in expectation of a reliable incoming call by reliable control, but may be switched manually. In this case, an external antenna having an antenna coupling portion that matches the external antenna coupling portion 25 can be connected to the mobile phone 20 without using the charger 10.

Next, with reference to FIG. 2 and FIG. 3, a specific example of the external antenna coupling portion 25 and the antenna coupling portion 16 other than a metallic connector such as a plug jack will be described.

In FIG. 3A, an inductance component such as a transformer or a coil for transmitting energy by electromagnetic coupling is used. In FIG. 3B,
For example, a capacitance component that transfers energy by an electric field using a capacitance via a dielectric layer can be used.

Next, a specific example of the connection detecting section 26 and the connection notifying section 17 will be described with reference to FIG. 2 and FIG. As a structure of both the connecting portions, for example, an electrode contact having both portions of the connecting portion bulging can be considered.

In FIG. 4A, when the portable telephone 20 is fixed to the charger 10 normally, the charge control circuit 13
This utilizes the fact that A operates to supply a charging current to the mobile phone 20. That is, the charge control circuit 1
3A sends a charging-in-progress signal to the coupling notification unit 17A during the normal charging operation. The connection notification unit 17A is connected to the connection detection unit 26.
A is notified to the coupling detection unit 26A as a coupling signal during charging to A. This charging signal can be one potential of the electrode terminal 14 (for example, the potential of the positive electrode). However, other types of signals may be used as long as the signals indicate that charging is in progress.

In FIG. 4B, the connection notifying section 17B uses one of the electrode terminals 14 as a connection signal regardless of whether the charge control circuit 13 is operating or not, and detects the connection detection section 26 of the mobile phone 20.
B is connected. In this case, even when the mobile phone 20 is fixed to the charger 10 to which no commercial power supply is connected, the incoming call can be waited using the connected external antenna 41.

Although the present invention has been described with reference to the shapes and functional blocks, any modifications may be made as long as the above functions are satisfied, and the above description does not limit the present invention.

Further, in the above description, only the portable telephone has been described, but it is needless to say that the present invention can be applied to other portable communication devices or simple portable telephones such as PHS (Personal Handy Phone System). .

[0037]

As described above, according to the battery charger with antenna of the present invention and the mobile phone using the same, even when charging with the battery charger with antenna installed in the center of the building, the mobile phone can be reliably used. An effect that an incoming call can be expected can be obtained.

The reason is that a charger for charging a secondary battery of a mobile phone is provided with an external antenna which forms a separate circuit from the built-in antenna of the mobile phone, so that a charger with an antenna is provided. This is because when the telephone is fixed, the external antenna is connected to the wireless circuit of the mobile telephone by the changeover switch of the mobile telephone, while the built-in antenna is disconnected from the wireless circuit.

That is, when an incoming call arrives at the mobile phone fixed to the charger, the antenna can be adjusted to the environment by connecting the external antenna to the charger and disconnecting the built-in antenna while connecting to the radio circuit.
Therefore, the performance of the antenna can be maximized. Furthermore, in order to avoid this erroneous operation of switching, a coupling detecting means is provided to completely couple the mobile phone with the charger with the antenna and charge the battery, and at the same time confirm that the external antenna is connected to the radio circuit. Can avoid a situation where an incoming call is received when the antenna is incomplete.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is a functional block diagram showing an embodiment of the present invention.

FIG. 3 is a circuit diagram illustrating a specific example of a coupling section of the antenna in FIG. 2;

FIG. 4 is a circuit block diagram showing a specific example of the connection notification and the connection detection of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Charger 11 Cell phone fixing part 12, 32 Power supply connector 13 Charging control circuit 14 Electrode terminal 15, 43 Antenna connector 16 Antenna coupling part 17 Connection notification part 20 Cell phone 21 Built-in antenna 22 Power receiving electrode 23 Phone battery 24 Radio circuit 25 External Antenna coupling unit 26 Coupling detection unit 27 Changeover switch 31 Plug connector 41 External antenna 42 Cable

Claims (8)

[Claims] 1. A charger with an antenna for charging a secondary battery built in a mobile phone, comprising: an external antenna arranged at a position where a good electric field strength is obtained and connected by a conductive path; An antenna coupling unit for connecting the external antenna to a wireless circuit of the mobile phone by a circuit separate from the built-in antenna. 2. The antenna coupling unit according to claim 1, wherein:
Metal connector that obtains electrical conduction by mating, inductance component that transmits energy by electromagnetic coupling,
And a capacitance component that transmits energy by an electric field using a capacitance. 3. The mobile phone according to claim 1, further comprising at least one of a combined signal when the mobile phone is fixed at a predetermined position and a charging signal when a charging current is supplied to the mobile phone. A charger with an antenna, characterized by comprising a coupling notifying unit for sending the signal to the antenna. 4. A mobile phone that charges a built-in secondary battery using a charger with an antenna, an external antenna coupling portion that couples with an external antenna connected to the charger with the antenna, and the external antenna coupling of the mobile phone. A mobile phone, comprising: a switch for switching between a unit and a built-in antenna to connect to a wireless circuit. 5. The external antenna coupling portion according to claim 4, wherein the external antenna coupling portion matches the antenna coupling portion provided in the charger with the antenna, and is a metal connector that obtains electrical continuity by fitting, and transmits energy by electromagnetic coupling. A mobile phone comprising: an inductance component; and a capacitance component that transmits energy by an electric field using a capacitance. 6. The mobile phone according to claim 4, further comprising a connection detection unit that detects connection with the charger with the antenna. 7. The switch according to claim 6, wherein the changeover switch disconnects a built-in antenna and connects an external antenna to the wireless circuit while the connection detection unit detects that the charger with the antenna is connected. A mobile phone characterized by the above-mentioned. 8. The connection detection unit according to claim 6, wherein the connection detection unit notifies at least one of a connection signal indicating that the mobile phone is connected at a predetermined position and a charging signal indicating that the charging circuit is operating from the charger with the antenna. A mobile phone characterized by detecting a connection by receiving the signal.