JPH0722264B2 - Mobile phone for car phone - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a mobile device for an automobile telephone which establishes a wireless line with a wireless base station to perform mobile communication.

INDUSTRIAL APPLICABILITY The present invention is used in a wireless telephone device mounted on an automobile.
In particular, it is used for a wireless telephone device capable of carrying out communication outside the vehicle as well as communicating from inside the automobile.

[Conventional technology]

2. Description of the Related Art Conventionally, a vehicle-mounted mobile device that is mounted in a fixed state in an automobile or the like has been used as a mobile device for an automobile telephone that sets a wireless line to a wireless base station and performs mobile communication.
The transmission output of this is 5W.

However, in order to meet the demand for car phone service even when the user is away from the car, a detachable mobile device has been considered.

Reference: Kobayashi, Nishiki, Taga, Sasaki, The Institute of Electronics and Electrical Engineers of Japan
34th Vity Conference, May 21-23, 1984 (Kobayashi, Nishiki, Taga, Sasaki; “DETACHABLE MOBIL
E RADIO UNITS FOR THE 800MHz LAND MOBILE RADIO SYS
TEM ", 34 THIEEE VT Conference, May 21-23, 1984).

Some of them are already in commercial service. These detachable mobile units are composed of a detachable unit that is carried out from the automobile and used, and an in-vehicle fixed unit that is fixed inside the vehicle.When mounted on a vehicle, it has the same performance as a conventional in-vehicle unit. It was

The structure of the attachment / detachment portion of such a conventional device is shown in FIGS. 7 and 8. That is, FIG. 7 shows a handheld type structure, and FIG. 8 shows a shoulder type structure.

The handheld type shown in FIG. 7 uses a small built-in battery for downsizing, has a transmission output of 1 W, and has a structure in which a transceiver and a transceiver are integrated. Since it is small, it is very easy to operate.

On the other hand, the shoulder type structure shown in FIG. 8 has a transmission output of 5 W and uses a large built-in battery, so that the talk time can be extended and the service area is almost the same as the in-vehicle mobile device. .

[Problems to be solved by the invention]

However, since the transmission power of the above-mentioned handheld type is small, the range where communication is possible is narrow and the communication time is short. Further, there is a drawback that the antenna gain is lowered because the main body approaches the human body during a call.

Further, the shoulder type structure has a drawback that the shape is larger and the weight is about 5 times as large as that of the handheld type structure.

In addition, since these components are configured independently of each other, the user must select one of them when first installing the automobile.

The present invention solves the above-mentioned drawbacks, and when a set of devices is installed in a vehicle, the user can selectively combine the devices of each part to improve the coverage area and talk time in the handheld configuration. It is an object of the present invention to provide a mobile device having excellent portability, and further to provide a mobile phone for an automobile telephone which has a detachable portion that can be used as a shoulder type configuration and which performs wireless communication outside the vehicle.

[Means for solving problems]

The present invention has a structure in which a vehicle-mounted fixing portion fixedly mounted on an automobile and including a power supply unit and a wireless signal interface unit, a vehicle-mounted antenna connected to the vehicle-mounted fixing unit, and a connection between the vehicle-mounted fixing unit are removable. The main body portion is provided with an operation portion including an operation button and a received electric field intensity display means on the surface of the device, and the on-vehicle fixed portion and the on-vehicle fixed portion in a state where the connection with the on-vehicle fixed portion is cut off. In a mobile phone for an automobile equipped with means for independently communicating using an internal battery and an antenna without passing through an in-vehicle antenna, the main body is detachably fitted and mounted, and the in-vehicle fixed And an adapter section for connecting the main body section and the in-vehicle fixed section, wherein the adapter section has a larger capacity than a built-in battery of the main body section. A battery that can be charged by the power supplied from the on-vehicle fixed part while connected to the on-vehicle fixed part, a power amplifier that is supplied by this battery and amplifies a transmission signal, and a built-in device connected to the output of this power amplifier. It is characterized by comprising an antenna, a means for connecting the main body part and the adapter part, and a means for performing communication via the power amplifier in a state where the adapter part and the in-vehicle fixed part are separated.

It is preferable that the main body portion includes a battery pack that can be connected in a state of being separated from the adapter portion, and the main body portion includes an external headset.

[Work]

In the device of the present invention, a detachable adapter part is provided between the main body part and the in-vehicle fixed part. Therefore, communication is carried out while the vehicle is running or while the vehicle is stopped, the adapter part and the in-vehicle fixed part are separated, and the one with the main body part and the adapter part connected is taken out of the car for communication, and the main body part is used as an adapter. There are three usage states in which only the main body part is taken out of the car for communication while separated from the parts.

In the above description, it is possible to efficiently perform communication by using the vehicle-mounted power source of the vehicle and using the antenna mounted on the vehicle of the vehicle with a large amount of electric power.

In the above, the battery and the power amplifier incorporated in the adapter unit can be used to perform communication for a relatively long time with a relatively large power.

In the above, the power is small and the battery has a short effective time, but the portable device is light and small.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a separated state expressed so that the assembly of the first embodiment of the present invention can be understood.

In FIG. 1, the in-vehicle fixing unit 3 and the in-vehicle antenna 23 are fixed to the automobile. The main body unit 1 can independently communicate with the wireless fixed station by disconnecting the connection from the vehicle-mounted fixed unit 3 and combining the mobile antenna 6 and the battery 5A. Reference numeral 25 indicates a car battery, and reference numeral 27 indicates an in-vehicle telephone.

Here, a feature of the present invention is a structure in which the main body 1 is connected to the vehicle-mounted fixing portion 3 via the adapter portion 2,
This adapter part 2 is connected to the main body part 1 and the adapter part 2
The on-vehicle fixed unit 3 and the on-vehicle fixed unit 3 are both detachable, and the adapter unit 2 includes a built-in large battery 21, a transmission power amplifier 15, and means for communicating via the transmission power amplifier 15. It's right there.

Further, when the main body 1 is separated from the adapter 2, the main body 1 is connected to the battery pack 5 containing the battery 5A as shown by a one-dot chain line, and the terminal 4A of the external headset 4 as a transmitter / receiver is the input terminal of the main body. The mobile antenna 6 is inserted into the portion 13 and is connected to the mobile antenna terminal 1A.

FIG. 2 shows the arrangement of the above-mentioned parts in a passenger car. When the user is in the vehicle as shown in the figure, communication is performed using the vehicle-mounted antenna 23 by the vehicle-mounted telephone 27 arranged near the driver's seat. The main body portion 1 and the adapter portion 2 are connected to the vehicle-mounted fixed portion 3 in the trunk.

In this case, the car battery 25 is used as the power source, but the large battery 21 of the adapter section 2 shown in FIG. 1 is in the charged state in the above state.

FIG. 3 is a diagram showing a configuration example of the main body 1. The main body 1 includes a mobile antenna 6, a demultiplexer 7, a transmitter 8, a receiver 9, a controller 10, an operation display 11 having a received electric field strength display function, a switching unit 12, and an input unit. It is composed of the output terminal 13. When the main body 1 is taken out and used, the battery pack 5 is attached to the main body 1 and connected to the input / output terminals 13 to prepare the external headset 4.

The operation when the main body 1 is taken out of the vehicle and used is as follows. When making a call, the external headset 4 is attached to the main body 1, the dial button of the operation display 11 of the main body 1 is pressed, the destination number is input, and the call start button is pressed to make a call. When an incoming call is received, an external headset is attached to the main body 1 and the call start button is pressed to make a call.

In this way, by using the external headset as the transmitter / receiver of the main body 1, the main body 1 can communicate with the main body 1 away from the human body. Therefore, the decrease in antenna gain due to the approach of the human body can be eliminated, and the received electric field intensity display of the operation display unit 11 installed on the main body unit 1 can be easily visually recognized, and the main body unit 1 can be moved to maximize the antenna sensitivity. You can make a call in Further, by preparing several kinds of capacities of the battery 5A of the battery pack 5, it is possible to easily prolong the callable time as desired.

FIG. 4 is a diagram showing a configuration example when the main body 1 and the adapter 2 are used in combination. The transmission signal from the transmitter 8 of the main body 1 is added to the duplexer 14 of the adapter 2 via the duplexer 7 and the switching unit 12. The output signal from the duplexer 14 is amplified by the transmission power amplifier 15,
It is sent to the built-in antenna 18 via the duplexer 16 and the switching unit 17. On the contrary, the high frequency signal received from the built-in antenna 18 passes through the switching unit 17 and the demultiplexer 16, and the receiving amplifier 19
Amplified by the switching unit of the main unit 1 via the duplexer 14
12, supplied to the receiver 9 via the duplexer 7. Further, the headset 4 connected to the input / output terminal 20A of the adapter section is connected to the switching section 12 of the main body section 1 via the switching section 17. Further, the adapter portion is large and includes a built-in battery 21 that can be charged from the car battery.

As described above, the mobile unit configuration in which the transmission output of the main body 1 is amplified by the configuration in which the main body 1 and the adapter 2 are combined, and has a larger battery than the battery pack 5 dedicated to the main body 1. In addition to this, it is possible to provide an improved attachment / detachment structure as compared with the case where only the main body 1 is used, together with the service area and the callable time.

Since the main body portion, the adapter portion, and the vehicle-mounted fixed portion are configured by their respective circuits in this manner, when performing communication in a service area closer to the vehicle, for example, the user can use the battery pack 5 as shown in FIG. To the main body 1,
By holding the hand strap 1B and attaching the headset 4 to the user's head, it becomes easy to carry. When connecting to the adapter part 2, shoulder belt 2A
To transport.

FIG. 5 is a block diagram showing a case where the mobile telephone for a car telephone of the present invention is used in a vehicle. The high-frequency signal of the adapter is connected to the vehicle-mounted antenna 23 via the switching unit 17 and the high-frequency signal cable 22 of the vehicle-mounted fixed unit 3, and has a large built-in battery.
21 is connected to a car battery 25 via a power supply section 24.
Further, the voice signal and the data signal from the switching unit 17 of the adapter unit are connected to the vehicle-mounted telephone 27 via the interface converter 26. Therefore, when mounted on a vehicle, it operates with the same performance as that of an ordinary mobile phone for an automobile.

FIG. 6 shows a block diagram of a second embodiment of the present invention.
In this example, the main body 1 is fitted below the adapter 2,
The adapter section 2 is provided with a dedicated transceiver 20 separately.

In this embodiment, the operation display unit 11 of the main body unit 1 is the adapter unit 2
The transmitter / receiver 20 of the adapter unit 2 is of a push button type, and is picked up and operated by hand.

In the above description, the main body part 1, the adapter part 2 and the in-vehicle fixing part 3 are installed in the trunk of the automobile.
If the driver's seat has a margin due to the shape of the automobile, these can be provided in the driver's seat.

〔The invention's effect〕

As described above, according to the present invention, when mounted on a vehicle, it is possible to secure a service area that is substantially the same as that of a conventional vehicle-mounted mobile device. In addition, even if the user leaves the vehicle, in the nearby service area, the transmitter / receiver is an external headset compared to the conventional hand-held configuration, so that the gain of the transmitter / receiver antenna due to human body approach It is possible to reduce the decrease, and it is possible to use the received electric field information displayed on the operation display unit to optimally select the antenna sensitivity at the call place. Also, a shoulder type structure can be adopted, and there is an effect that a high quality call can be made for a long time in a wide service area even if it is away from the vehicle.

[Brief description of drawings]

FIG. 1 is a perspective view of the first embodiment of the present invention. FIG. 2 is an arrangement state diagram of the above embodiment. FIG. 3 is a block diagram of the body of the above embodiment. FIG. 4 is a block diagram showing a combination of the main body unit and the adapter unit of the above embodiment. FIG. 5 is an overall block diagram of the above embodiment. FIG. 6 is a block diagram of the second embodiment of the present invention. FIG. 7 is a perspective view of a conventional example (handheld type). FIG. 8 is a perspective view of a conventional example (shoulder type). 1 ... Main body, 1A ... Mobile antenna terminal, 1B ... Hand strap, 2 ... Adapter, 2A ... Shoulder belt, 2B, 3B ... Connector, 2C, 5B ... Connector pin, 3
…… In-vehicle fixed part, 3C …… Positioning protrusion, 4 …… External headset, 4A …… Terminal, 5 …… Battery pack, 5A …… Battery, 6 …… Mobile antenna, 7, 14, 16 …… minute Wave duplexer,
8 ... Sending unit, 9 ... Reception unit, 10 ... Control unit, 11 ... Operation display unit, 12,17 ... Switching unit, 13,20A ... I / O terminal, 15 ... Transmission power amplifier, 18 ...... Antenna, 19 ...... Reception amplifier, 20 ...... Transceiver, 21 …… Large battery, 22 …… High frequency signal cable, 23 …… Vehicle antenna, 24 …… Power supply section, 25 …… Car battery, 26 …… … Interface converter, 27 …… Car phone.

Front page continuation (72) Inventor Kazuhiro Yoshizawa 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Tsutomu Watanabe, Examiner, Nihon Telegraph and Telephone Corporation (56) References: 59-69549 (JP, U) Actual Kai 60-144337 (JP, U)

Claims (2)

[Claims] 1. An on-vehicle fixing part fixedly mounted on an automobile and including a power supply part and a radio signal interface part, an on-vehicle antenna connected to the on-vehicle fixing part, and the on-vehicle fixing part are detachably connectable. The main body part has a structure, and the main body part has an operation part including an operation button and a received electric field strength display means on the surface of the device, and the on-vehicle fixed part is disconnected from the on-vehicle fixed part. Also, in a mobile phone for a mobile phone equipped with means for independently communicating using an internal battery and an antenna without going through an in-vehicle antenna, the main body is detachably fitted and mounted, and A structure is detachable between the fixed part and an adapter part that connects the main body part and the in-vehicle fixed part, and the adapter part has a capacity larger than that of a built-in battery of the main body part. A battery that can be charged by the power supplied from the on-vehicle fixed part while connected to the on-vehicle fixed part, a power amplifier that is supplied by this battery and amplifies a transmission signal, and is connected to the output of this power amplifier. A built-in antenna, and means for communicating via the power amplifier in a state in which the main body section and the adapter section are connected and the adapter section and the vehicle-mounted fixed section are separated from each other. Mobile phone for car phones. 2. The car phone according to claim 1, wherein the main body part includes a battery pack that can be connected in a state of being separated from the adapter part, and the main body part includes an external headset. Mobile.