Radio telephone apparatus

Claim 2

A radio telephone apparatus comprising: an additional unit connecting a first transmission-reception antenna thereto, and a portable radio device including a second transmission-reception antenna and a radio unit, characterized by the radio device being removably connected to the additional unit via a coaxial cable; and transmission-reception antenna changing means for connecting the radio unit to the first transmission-­reception antenna via the coaxial cable when the radio device is connected to the additional unit and for connecting the radio unit to the second transmission-­reception antenna when the radio device is removed from the additional unit.

Claim 3

A radio telephone apparatus according to claim 1, wherein the antenna changing means includes: means for detecting whether the second transmission-reception antenna is placed in a transmission-reception enable state; and switching means for connecting the radio unit of the radio device to the second transmission-reception antenna when the detecting means detects that the second transmission-reception antenna is in the transmission-­reception enable state, and for connecting the radio unit of the radio device via the coaxial cable to the first transmission-reception antenna when the second transmission-reception antenna is not in the transmission-­reception enable state.

Claim 4

A radio telephone apparauts according to claim 2, wherein the detecting means detects that the second transmission-reception antenna is in the transmission-­reception enable state when the second transmission-­reception antenna is stretched from the radio device.

Claim 5

A radio telephone apparatus according to claim 2, wherein the transmission-reception antenna changing means includes switching means operated in accordance with the position of the second transmission-reception antenna.

Claim 6

A radio telephone apparauts comprising: an additional unit including a first transmission-reception antenna connected thereto and a first power supply; a portable radio device connected removably via a coaxial cable to the additional unit and including a second antenna, a radio unit, a secondary battery and a second power supply; transmission-reception antenna changing means for connecting the radio unit to the first transmission-­reception antenna via the coaxial cable when the radio device is connected to the additional unit, and for connecting the radio unit to the second transmission-­reception antenna when the radio device is removed from the additional unit; and power source changing means for applying the output from the second power supply to the first power supply when the radio device is connected to the additional unit, and for connecting the second power supply to the secondary battery when the radio device is removed from the additional unit.

Claim 7

A radio telephone apparauts comprising: an additional unit including a first transmission-reception antenna connected thereto and a first power supply; a portable radio device connected removably via a coaxial cable to the additional unit and including a second antenna, a radio unit, a secondary battery and a second power supply; transmission-reception antenna changing means for connecting the radio unit to the first transmission-­reception antenna via the coaxial cable when the radio device is connected to the additional unit, and for connecting the radio unit to the second transmission-­reception antenna when the radio device is removed from the additional unit; and power source changing means for applying the output from the second power supply to the first power supply when the radio device is connected to the additional unit, and for connecting the second power supply to the secondary battery when the radio device is removed from the additional unit.

Claim 8

A radio telephone apparatus according to claim 5, wherein the coaxial cable includes a power supply line, and the secondary battery is connected to the first power supply via the power supply line included in the coaxial cable when the radio device is connected to the additional unit.

Claim 9

A radio telephone apparatus according to claim 5, wherein the additional unit includes a first control circuit; the radio device includes a second control circuit; the coaxial cable includes a signal line; and the second control circuit is connected to the first control circuit via the signal line included in the coaxial cable when the radio device is connected to the additional unit.

Claim 10

A radio telephone apparatus according to claim 5, wherein the power source changing means includes: means for detecting whether the coaxial cable is connected to the radio telephone; and switching means for applying the output from the first power supply to the second power supply and the secondary battery when the detecting means detects that the coaxial cable is connected to the radio device, and for applying the output from the secondary battery to the second power supply when the detecting means detects that the coaxial cable is connected to the radio device .

Claim 11

A radio telephone apparatus according to claim 5, wherein the power source changing means includes switching means operated depending on whether the coaxial cable is connected to the radio device.

Claim 12

A radio telephone apparatus comprising: a portable radio device accommodating a transmission-reception antenna therein; an additional unit mounted on a vehicle; a transmission-reception antenna fixed to the vehicle; and a coaxial cable removably connecting the radio device and the additional unit; the radio device including: a control panel operated for the transmission and reception of calls; a telephone transmitter-receiver and voice circuit for making telephone communication; a battery for supplying power to the above-­mentioned elements of the apparatus; and a transmission-reception unit for transmitting and receiving, by radio, telephone communication signals to and from a different radio apparatus using one of the accommodated transmission-reception antenna and the transmission-reception antenna fixed to the vehicle via the coaxial cable; and the additional unit including: a rest mechanism for receiving the radio device removably thereon.

Claim 13

A radio telephone apparatus comprising: a portable radio device accommodating a transmission-reception antenna therein; an additional unit mounted on a vehicle; a transmission-reception antenna fixed to the vehicle; and a coaxial cable removably connecting the radio device and the additional unit; the radio device including: a control panel operated for the transmission and reception of calls; a telephone transmitter-receiver and voice circuit for making telephone communication; a battery for supplying power to the above-­mentioned elements of the apparatus; and a transmission-reception unit for transmitting and receiving, by radio, telephone communication signals to and from a different radio apparatus using one of the accommodated transmission-reception antenna and the transmission-reception antenna fixed to the vehicle via the coaxial cable; and the additional unit including: a rest mechanism for receiving the radio device removably thereon.

Claim 14

A radio telephone apparatus according to claim 10, wherein the transmission-reception unit of the radio device includes: a transmitter-receiver for transmitting and receiving telephone communication signals by radio between the telephone transmitter-receiver and another radio apparatus; and an antenna changer for detecting whether the transmission-reception antenna accommodated in the radio device is in a transmission-reception enable state, for connecting the accommodated transmission-reception antenna to the transmitter-receiver when that transmission-­reception antenna is in the transmission-reception enable state, and for connecting the transmission-reception antenna fixed to the vehicle to the transmitter-receiver unit via the coaxial cable when the accommodated transmission-reception antenna is in a transmission-­reception disable state.

Claim 15

A radio telephone apparatus according to claim 10, wherein the coaxial cable includes: a signal line for transmitting therethrough a high frequency telephone communication signal on the transmission-reception antenna fixed to the vehicle; and a signal line for supplying a charging current therethrough to a battery for the radio device.

Claim 16

A radio telephone apparatus according to any one of claims 10 - 12, wherein the telephone transmitter and receiver of the radio device are provided on its side where the radio device is removably attached to the additional unit, and wherein the control panel is provided on the back side of the telephone transmitter-receiver.

Claim 17

A radio telephone apparatus comprising: a portable radio device accommodating a transmission-reception antenna therein; an additional unit mounted on a vehicle; a transmission and reception antenna fixed to the vehicle; and a coaxial cable removably connecting the radio device and the additional unit; the radio device including: a control panel operated for the transmission and reception of calls; a telephone transmitter-receiver and a voice circuit for making telephone communication; a connector for transmitting therethrough signals between the voice circuit and the additional unit; a battery for supplying power to the above-­mentioned elements of the apparatus; and a transmission-reception unit for transmitting and receiving, by radio, telephone communication signals to and from another radio apparatus using one of the accommodated transmission-reception antenna and the transmission-reception antenna fixed to the vehicle via the coaxial cable; and the additional unit including: a rest mechanism for receiving the radio device removably thereon; a voice amplifying telephone transmitter-­receiver; and a connector connected to the connector of the radio device to connect the voice amplifying transmitter-­receiver to the voice circuit when the radio device is mounted on the rest mechanism.

Claim 18

A radio telephone apparatus comprising: a portable radio device accommodating a transmission-reception antenna therein; an additional unit mounted on a vehicle; a transmission and reception antenna fixed to the vehicle; and a coaxial cable removably connecting the radio device and the additional unit; the radio device including: a control panel operated for the transmission and reception of calls; a telephone transmitter-receiver and a voice circuit for making telephone communication; a connector for transmitting therethrough signals between the voice circuit and the additional unit; a battery for supplying power to the above-­mentioned elements of the apparatus; and a transmission-reception unit for transmitting and receiving, by radio, telephone communication signals to and from another radio apparatus using one of the accommodated transmission-reception antenna and the transmission-reception antenna fixed to the vehicle via the coaxial cable; and the additional unit including: a rest mechanism for receiving the radio device removably thereon; a voice amplifying telephone transmitter-­receiver; and a connector connected to the connector of the radio device to connect the voice amplifying transmitter-­receiver to the voice circuit when the radio device is mounted on the rest mechanism.

Claim 19

A radio telephone apparatus according to claim 14, wherein the transmission-reception unit of the radio device includes: a transmitter-receiver for transmitting and receiving telephone communication signals by radio between the telephone transmitter-receiver and another radio apparatus; and an antenna changer for detecting whether the transmission-reception antenna accommodated in the radio device is in a transmission-reception enable state, connecting that transmission-reception antenna to the transmitter-receiver when the transmission-reception antenna is in the transmission-reception enable state, and for connecting the transmission-reception antenna fixed to the vehicle to the transmitter-receiver via the coaxial cable when the accommodated transmission-reception antenna is in a transmission-reception disable state.