CA1293071C - Radio telephone apparatus - Google Patents
Radio telephone apparatusInfo
- Publication number
- CA1293071C CA1293071C CA000578508A CA578508A CA1293071C CA 1293071 C CA1293071 C CA 1293071C CA 000578508 A CA000578508 A CA 000578508A CA 578508 A CA578508 A CA 578508A CA 1293071 C CA1293071 C CA 1293071C
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- Canada
- Prior art keywords
- transmission
- radio
- reception antenna
- radio device
- reception
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 6
- 241001481828 Glyptocephalus cynoglossus Species 0.000 description 2
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical group CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- 101150087426 Gnal gene Proteins 0.000 description 1
- 101150014691 PPARA gene Proteins 0.000 description 1
- 241000364027 Sinoe Species 0.000 description 1
- 210000000941 bile Anatomy 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
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- Mobile Radio Communication Systems (AREA)
- Telephone Set Structure (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A radio telephone apparatus including a portable radio device capable of being mounted on and carried out from a vehicle such as an automobile in use. The portable radio device has a transmission-reception antenna accomodatable therein and is connected via a removable coaxial cable with an additional unit mounted on the vehicle. When the radio device is connected to the additional unit via the coaxial cable, a transmission-reception antenna fixed to the vehicle is connected to the radio unit of the portable radio device via the coaxial cable whereas when the portable radio device is removed from the additional unit, the accommodatable transmission-reception antenna is connected to the radio unit of the radio device.
A radio telephone apparatus including a portable radio device capable of being mounted on and carried out from a vehicle such as an automobile in use. The portable radio device has a transmission-reception antenna accomodatable therein and is connected via a removable coaxial cable with an additional unit mounted on the vehicle. When the radio device is connected to the additional unit via the coaxial cable, a transmission-reception antenna fixed to the vehicle is connected to the radio unit of the portable radio device via the coaxial cable whereas when the portable radio device is removed from the additional unit, the accommodatable transmission-reception antenna is connected to the radio unit of the radio device.
Description
~3G*~
RADIO TELEPHONE APPARATUS
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates to radio telephone apparatus which are mounted and used on vehicles such as automobiles and, more particularly, to radio telephone apparatus which include a portable radio device removable outside the vehicles.
RADIO TELEPHONE APPARATUS
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates to radio telephone apparatus which are mounted and used on vehicles such as automobiles and, more particularly, to radio telephone apparatus which include a portable radio device removable outside the vehicles.
2. Description of the Related Art Automobile telephone devices are known as radio telephone apparatus used in vehicles such as automobiles.
In the automobile telephone device, a dial signal and a communication signal are transmitted from a handset disposed at the seat of the automobile via a transceiver installed, for example, in the trunk to the base station through which the telephone device makes telephone communication with a remote cable telephone or a remote radio telephone apparatus. According to this structure, the handset at the automobile seat cannot be removed from the transceiver in the trunk, so that the handset cannot be moved outside the automobile to make telephone communication.
Radio telephone apparatus h~ve been developed which are capable of making telephone communication either inside or outside the vehicle. Fig. 9 is a block diagram of such conventional radio telephone apparatus which 3k lZ931~
lncludes a portable radlo deviae 1, ~ vehlcle-mounted ~dditional unit Z, a hand~et 3 ~nd a hand~at cradle 4.
Th~ radio de~lce 1 is fix~d u~ually in ~ recess in the additional unlt 2. A chargeable battery 11 i8 charged with B cha~ging current whlch flo~ from the automoblle battery ~not ~hown), via a ~ower cAble 20, a conneator 21 of the unlt 2, ~nd a connector 10 mounted on the bac~ of radlo devlce 1.
~ he radio device 1 lnclude~ a telephone mouthpiece 12 and a telephone earpiece 13 for telephone commu~ica~ion, ~ control panel 14 lncluding di~l key~, etc " operated for trAn3mltting and receivlng call~, a telescoplc an~en~ 15, and a tran~mltter-receiver, a voic~
circult, eta., provided therein.
The addltlonal unlt 2 includes an an~enna cable 22 which i8 connected to a transml~ter~rQceiver antenna 5 fixed out~ide the vehicle, and a voice cable 23 through whioh a oommun~catio~ s~gnal 1~ tran~mitt~d ~nd received by ~h~ ~r~n~ tt~-reç~iv~r in th~ ra~lo d~vico 1 vl~ the handset cradle 4 to and ~om a telephone mouthpiece 30 and a telephone recelv0r 31 of the hand~et 3.
The hand8et 3 h~ a curl aord 32 which transmit~
a telephone communication ~ignal, When the handset 3 i8 ~laced on the c~adle 4, vAlleys tno~ ~hown) in the hlld~et between the telephon~ mouthpiece and ear~le~e 30 and 31 a~e engaged with re~ilient pawl~ 40 and 41 of the cradle 4 1~3~:1 ~or fixing purpo~es.
In operation, when the ~ntenna 5 ~ixed to the vehicle r0ceives an incoming algnQl from a calling telephone apparatu~ vla the bs~e s~ation (not shown), the reaeive~ si~nal i~ dellver~d via th~ ~ntenna cablQ 22, and connectors 21, 10 to the transmitter-reaeiver of thl3 radlo d~vice 1. The tran~mitter-recelver demodulates the recslved ~lgn~l and gener~te~ a rlnging tone ~rom a sounder (not ~hown) o the r~dio device l to c~ll the u~r. When the u6er operates ~n off-hook ~witah ~nc)t shown) provided at th~ o~ntrol panel 14 o~ t}le r~dio dsvlce 1 in response to the rln~lng tone, a telephone communication path 1~ e6tabli~hed betw~en the radlo devic~e l and the calling tele~hone ~ppara~u~ via a radio li.nk.
Thu6 when the handset 3 i8 llfted from the hand~t cradle 4, telephone communlca~lon is enabled through the telephone mou~hpi~ce and earpiece 30 a~d 31 of th~ handset
In the automobile telephone device, a dial signal and a communication signal are transmitted from a handset disposed at the seat of the automobile via a transceiver installed, for example, in the trunk to the base station through which the telephone device makes telephone communication with a remote cable telephone or a remote radio telephone apparatus. According to this structure, the handset at the automobile seat cannot be removed from the transceiver in the trunk, so that the handset cannot be moved outside the automobile to make telephone communication.
Radio telephone apparatus h~ve been developed which are capable of making telephone communication either inside or outside the vehicle. Fig. 9 is a block diagram of such conventional radio telephone apparatus which 3k lZ931~
lncludes a portable radlo deviae 1, ~ vehlcle-mounted ~dditional unit Z, a hand~et 3 ~nd a hand~at cradle 4.
Th~ radio de~lce 1 is fix~d u~ually in ~ recess in the additional unlt 2. A chargeable battery 11 i8 charged with B cha~ging current whlch flo~ from the automoblle battery ~not ~hown), via a ~ower cAble 20, a conneator 21 of the unlt 2, ~nd a connector 10 mounted on the bac~ of radlo devlce 1.
~ he radio device 1 lnclude~ a telephone mouthpiece 12 and a telephone earpiece 13 for telephone commu~ica~ion, ~ control panel 14 lncluding di~l key~, etc " operated for trAn3mltting and receivlng call~, a telescoplc an~en~ 15, and a tran~mltter-receiver, a voic~
circult, eta., provided therein.
The addltlonal unlt 2 includes an an~enna cable 22 which i8 connected to a transml~ter~rQceiver antenna 5 fixed out~ide the vehicle, and a voice cable 23 through whioh a oommun~catio~ s~gnal 1~ tran~mitt~d ~nd received by ~h~ ~r~n~ tt~-reç~iv~r in th~ ra~lo d~vico 1 vl~ the handset cradle 4 to and ~om a telephone mouthpiece 30 and a telephone recelv0r 31 of the hand~et 3.
The hand8et 3 h~ a curl aord 32 which transmit~
a telephone communication ~ignal, When the handset 3 i8 ~laced on the c~adle 4, vAlleys tno~ ~hown) in the hlld~et between the telephon~ mouthpiece and ear~le~e 30 and 31 a~e engaged with re~ilient pawl~ 40 and 41 of the cradle 4 1~3~:1 ~or fixing purpo~es.
In operation, when the ~ntenna 5 ~ixed to the vehicle r0ceives an incoming algnQl from a calling telephone apparatu~ vla the bs~e s~ation (not shown), the reaeive~ si~nal i~ dellver~d via th~ ~ntenna cablQ 22, and connectors 21, 10 to the transmitter-reaeiver of thl3 radlo d~vice 1. The tran~mitter-recelver demodulates the recslved ~lgn~l and gener~te~ a rlnging tone ~rom a sounder (not ~hown) o the r~dio device l to c~ll the u~r. When the u6er operates ~n off-hook ~witah ~nc)t shown) provided at th~ o~ntrol panel 14 o~ t}le r~dio dsvlce 1 in response to the rln~lng tone, a telephone communication path 1~ e6tabli~hed betw~en the radlo devic~e l and the calling tele~hone ~ppara~u~ via a radio li.nk.
Thu6 when the handset 3 i8 llfted from the hand~t cradle 4, telephone communlca~lon is enabled through the telephone mou~hpi~ce and earpiece 30 a~d 31 of th~ handset
3, ,~
The voice slgnal from the telephone mouthplece 30 of the hand8et l i5 dellvered as a modulatlon ~ignal for the carrler sl~nAl through the curl code 32, c~adle 4, voloe cable 23, connector 21 of the addltion~l unit 2, and connector 10 of the radio device 1 to the txAn~mitter-~eceiver of the radio device 1. The mod~lated output ~rom the r~dlo device 1 i~ transmitted vla the connector~ lO, 21, and antenna oable 22 from the antennA 5.
lZ93~1 If the o~-hook ~nd dialln~ operations are ~e~formed at the control panel 14 o~ the rsdio devich l ~o~ tran~ml~ting a aall ~ignal f~om ths v~hicle, the diallng ~ignal is delivered ~E~ a modulatlon lnput to the transmit~er-receiv~r where it iB converted to a high ~r~ue~cy ~lg~ nd tr~n~mitted ~ia con~ector4 lO, 21 ~nd ~ntenna aable 22 Çrom the antenna 5. A telephone communlc~tion p~th i~ 0stabli~hed by the off-hook r3spon6 o th0 called apparatu6 A~ in the reception o~ the call.
When the rad$o d~vice 1 i8 removed from the ~ddltionAl unit 2 a~d used out~ide the vehicle, the an~0nnA 15 o~ th~ r~dlo device 1 i~ ~et in ~ trAn~m:Ls~ion~
receptlon sn~ble ~tate by extending the antenna 15 to thereby transm~t and receive call~ directly to ~nd l.rom the baee 3tation. ~hen a communlcation ~Rth to the called apparatu~ is est~blish0d, telephone communicatio~ iEI
po~ible u~ing the ~elephone mouthplce ~nd e~rpiece 12 and l3.
As just mentioned above, telephone communicatlon 18 poEjsible both in~ide And out~ie the vehlcl~ accoIding to thl~ arrangement.
81nce the handset 3 include~ only the telephone mouthpiece and earpl00e, the of f -hoo~ and dlaling operatlons mu~t be pe~formed at the oo~trol panel 14 o~
the r~dlo devlce 1. There~ore, the radlo devlce 1 and ha~d~et 3 are required to be dis~o~ed clo~e to each other.
lZ93(~1 -- S
Sinoe m~ny drlve meter~ or the like are disposed in the vioinity of the driver ~eat of the automobile, it i~ often di~ficult to seleot a 0pace where the radlo ~evice 1, additional unlt 2, handset 3 and hand~et cradl~
The voice slgnal from the telephone mouthplece 30 of the hand8et l i5 dellvered as a modulatlon ~ignal for the carrler sl~nAl through the curl code 32, c~adle 4, voloe cable 23, connector 21 of the addltion~l unit 2, and connector 10 of the radio device 1 to the txAn~mitter-~eceiver of the radio device 1. The mod~lated output ~rom the r~dlo device 1 i~ transmitted vla the connector~ lO, 21, and antenna oable 22 from the antennA 5.
lZ93~1 If the o~-hook ~nd dialln~ operations are ~e~formed at the control panel 14 o~ the rsdio devich l ~o~ tran~ml~ting a aall ~ignal f~om ths v~hicle, the diallng ~ignal is delivered ~E~ a modulatlon lnput to the transmit~er-receiv~r where it iB converted to a high ~r~ue~cy ~lg~ nd tr~n~mitted ~ia con~ector4 lO, 21 ~nd ~ntenna aable 22 Çrom the antenna 5. A telephone communlc~tion p~th i~ 0stabli~hed by the off-hook r3spon6 o th0 called apparatu6 A~ in the reception o~ the call.
When the rad$o d~vice 1 i8 removed from the ~ddltionAl unit 2 a~d used out~ide the vehicle, the an~0nnA 15 o~ th~ r~dlo device 1 i~ ~et in ~ trAn~m:Ls~ion~
receptlon sn~ble ~tate by extending the antenna 15 to thereby transm~t and receive call~ directly to ~nd l.rom the baee 3tation. ~hen a communlcation ~Rth to the called apparatu~ is est~blish0d, telephone communicatio~ iEI
po~ible u~ing the ~elephone mouthplce ~nd e~rpiece 12 and l3.
As just mentioned above, telephone communicatlon 18 poEjsible both in~ide And out~ie the vehlcl~ accoIding to thl~ arrangement.
81nce the handset 3 include~ only the telephone mouthpiece and earpl00e, the of f -hoo~ and dlaling operatlons mu~t be pe~formed at the oo~trol panel 14 o~
the r~dlo devlce 1. There~ore, the radlo devlce 1 and ha~d~et 3 are required to be dis~o~ed clo~e to each other.
lZ93(~1 -- S
Sinoe m~ny drlve meter~ or the like are disposed in the vioinity of the driver ~eat of the automobile, it i~ often di~ficult to seleot a 0pace where the radlo ~evice 1, additional unlt 2, handset 3 and hand~et cradl~
4 are in~talled. Even if they ~r~ in~talled, they may hinder the driver'~ operatione, ~o that the~e i~ nothing for it but to seleot an install~tion pl~ce inaonvenient to operate the talephone apparatus.
It 18 therefore an object o the pre~Qnt lnvention to provide A radio telephone apparatus which occupies a smAll in~talla~ion space in a vehicle suoh as an automoblle.
SUMMARY 0~ T~IE INVENTION ~
The pre6ent inventlon provlde~ ~ radio telephone apparat~ compri~lng ~n additlonal unit connecting ~ fi~st transmlsslon-r~ceptlon antenn~ theretol a portable r.~dlo device conneoted remov~bly via a coaxial oable ~o the a~ditional unit and i~cluding a second tran~mi~lon--reoe~tion antenna and a radlo unitJ and tran~mi~iorl-reception antenna changlng mean~ connecting the radlo unlt to the ~lr~t trAn~mi~slon-recep~lon anten~a vla the coaxial aable when the ~adio device i8 conn~cte~ to the addltional unlt and for aonneoting the radio unlt to the second transmi~ion-rece~tion antenna when the radio device is removed ~rom the additional u~it.
The pre~ent invention achieves the ~bove ob~ect 1~3~
by ~roviding a radio t~lephone apparatu~ which inc].ude~ A
portable r~dio device hAving ~n accommodatable or t~le~copic tran~mls~ion and receptlon antenna, an addltional unlt mounted in the vehicle, a tran~ ion and rece~tion antenna fixed to the vehicle, ~d a remuvable ao~xial cable oonne~ting the portable radio device and Addltional unlt~ The r~dio tlevice includes a control panel for perPormlng operations to ~lace and reaelve callts, a tel~phone mou~hpiece and ~ar~i~ce ~nd ~ voice clrouit for telephone communication, a battery for ~eedlng power to the respectlve ~egulred el~ment~ o~ the ~paratu~, and a tran~mltter-rec~lver unit for tran8mittlng and recelving, by radio, a telephont~
¢ommunlcat~on ~ignal to and from another radio a~p~r.atu~
u~ing one of the accommodatable or ~ixed tr~nsmis6it)n-reoeption antenna~. The additlon~l unit l~clude~ a ra~t m~chani~m fo~ resting thereon the portable ~adio de~ice removably. ~.
The portable radio devlc~ ls u~ually fixed by the rest mt~ch~ni~m o~ the addltional unlt and connected to the tr~n3ml86ion-reception ant~nn~ fl~ed to the vehicle ~1A the coaxl~l cable. Under ~uch conditions, if there i~
an lncomlng call, the ~ecelved signal from the tran~mls610n-recQption antenna ~ixed to the ~ehlcle 1B
ln~ut to the tr~n~mltter-receiver unlt o~ the portable rAdio de~lce via the coaxial c~ble and demodulat~d ~Z93C37i thereby. ~y the aff-hook o~eration at the rAdlo device, a communic~tion pa~h with th~ aalliny app~ratus i~
establlshed via the transmi~ion-rece~tion ~ntenna flxed to the vehiale, and telephone ommunication 1~ pos~3ible u~ing the telephone mouthpiece ~nd ear~iece of the portabl~ radio devlce.
When the portable radio devlce i~ to be u~ed out~lde ~he vehiale, the coaxiaL cable i~ removed, the t~ns~i~ion-reception antenna of the radio device i~
pl~ced in a tx~nsmi~lon-reception ena~le ~tate ~nd a calling operatlon or an lncomlng call proaesslng operatlon i~ pe~for~ed. In thi~ o~e, a tele~hone co~unlcation p~th 18 0 tabll~hed ~ia the tr~nsmi~sion-reception antenn~
of the radio devlce and t~lephone communlcation 1~
~ossible vi~ th~ telephone mouthpiece and earplece.
A~ just de8cribed above, the port~ble radio device 1~ used ag ~ telephone handset ln common fo~
communication both in~'lde an~ o~t~lde the vehlcl~, ~nd only one of the tran~mls~ion-receptlon antenn~ ~ixe~ to the vehicle or the tran~mi~slon-rece~tion ~ntenna o~ the portable ~sdlo device 18 ~elected ln u~e. ~hus the convention~l handaet and the cr~dle th~refor a~e not re~ulred, 80 that thelr s~ce iB 8aved which would otherwi~e be needed. The~efo~e, the selectlon of the pla¢e where the telephone a~p~ratu8 i3 in8 talled i8 Vflrv ea~y .
~293~'7i BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a perspective view of one embodiment of the present invention;
Fig. 2 is a circuit block diagram showing the detailed structure of a portable radio device and a vehicle-mounted additional unit;
Fig. 3 is a schematic showing a specific example of an antenna changer;
Fig. 4 is a schematic showing a specific example of a power source switch;
Fig. 5 is a cross section view of a cable used in the embodiment;
Fig. 6 is a perspective view of a further embodiment;
Fig. 7 is a circuit block diagram showing the detailed structure of a portable radio device and a vehicle-mounted addit~ional unit in the further embodiment;
Fig. 8 is a cross section schematic of a cable used in the further embodiment; and Fig. 9 is a block diagram showing the structure of a conventional radio telephone apparatus.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Fig. 1 is a schematic showing one embodiment of the present invention, and mainly includes a portable radio device 6, a vehicle-mounted additional unit 7, a coaxial cable 8, a vehicle-mounted transmission and lZ93~
~ 9 _ receptiGn ~ntenna 9.
The r~dio device G lnclude~ ~ control p~lnel 60 whioh i8 operated te transmit and rec~31v~ cAll~ di~pl~y 61 which dis~lay~ ~ dial nu~ber used $or tranBmitting A
call, ~ telephone ear~iece 62, a tel~phona mouth~iece 63, ~ charge~ble battery 64, a connector 65 for the coaxial c~ble 8, an accommodatable tel~copic snt~nna G6, and tr~ns~itter, ~ recelver and ~ voic~ alrcuit pro~ided therein to be ~escribed l~te~ in more detail.
Th~ ~dditional unit 7 ha~ a pair of re~lllent pawls 70 and 71 engageable in valley~ in the radio device body between the tele~hone earpiece ~nd mouthpiQce 62 ~nd 63 o~ the ra~io ~evice 6 to fix ~me, a disenga~ln5~ unlt 72 which disengages pawl~ 70 and 71 from the valley~, conn~ctor 73 connected to a connector 67 flxed to the telephon~ mouthpieo~ and recelver surface of the radio device 6, ~ ~poaker 74 and a micropho~e 75 ~or hand-fre~
oper~tlon, ~n a~tenna~9 connected via an antenna c~ble 76 to the ~dl~ion~l unit, ~nd a power ~ble 77 receiYlng battery power for the ~utom~bile.
~ he rAdlo device 6 iB u~ually fixed by the r~llient pawls 70 and 71 when pl~ced o~ the additlonal unit 7. At ~hi~ time, the oonnectors 73 ~nd 67 a~e connected and A ch~rgl~g current is ~u~plied via the connector~ 73 and 67 to the battQry 6~ of the rAdlo devlce 1~3~'71 1, and the input to and output from the voice circuit of the radio device 6 are connected to the microphone 75 and speaker 74 of the additional uni-t 7 via connectors 73 and 67.
Fig. 2 is a c.ircuit block diagram showing the detailed structure of the radio device 6 and additional unit 7. The radio device 6 includes a transmitter-receiver unit 600, a voice circuit 601, a control circuit 602, a battery 64 or a power supply 603 which converts a power source voltage supplied from the additional unit 7 via the coaxial cable 8, to voltages used by the respective circuit elements of the radio device 6, a connector 604 for the coaxial cable 8, and a power source switch 605 which selects one of the output from the battery 64 and the power source voltage from the additional device 7 and supplies the selected voltage to the power supply 603.~.
The transmitter-receiver unit 600 includes a transmitter 606, a receiver 607, a synthesizer 608 which sets the frequencies used for the transmitter and receiver 606 and 607, an antenna duplexer 609, and an antenna changer 610 which selects one of the antenna 9 and a radio device antenna 66 and connects the selected one to the antenna duplexer 609.
The antenna changer 610 includes a limit switch which, for example, senses the state in which the antenna ~293~'71 66 is accommodated, as shown in Fig. 3, and connects the antenna 66 to the duplexer 609 only when the antenna 66 is extended for transmission and reception purposes.
The power source switch 605 includes a limit switch which is operated, for example, when -the coaxial cable 8 is attached to the connector 604, as shown in Fig.
4, to connect the input to the power supply 603 to the additional device.
In addition to the input to the power supply 603, a control signal line of the control circuit 602, a high frequency signal line to the antenna changer 610 and a ground potential line are connected to the connector 604. Therefore, as shown in Fig. 5, the coaxial cable 8 includes a 4-core cable which includes a ground potential line 80, a high frequency signal line 81, a control signal line 82 and a power source voltage line 83. A control signal is transmitted and received in a serial manner between the control circuit 602 of the radio device 6 and the control circuit 703 of the additional unit 7 via the control line 82.
The additional unit 7 includes a booster 700 which amplifies to predetermined power high frequency signals transmitted and received via the antenna 9, a voice circuit 701 connected between the connector 73 and the speaker 74, microphone 75~ a power supply 702 which converts a direct current voltage from a vehicle-mounted battery B to predetermined voltages which are then supplied to the respective circuits of the additional unit and supplies a voltage to the portable radio device via the coaxial cable 8, a control circuit 703 which controls the booster 700 and voice circuit 701, and a connector 704 connected to the coaxial cable 8.
The booster 700 includ~s antenna duplexers 705, 706, a reception amplifier 707, a transmission power amplifier 708, and an automatic power control circuit (APC) 709 which controls the output level of the transmission power amplifier.
In the arrangement, the additional unit 7 is fixed close to the driver's seat in the vehicle, and the radio device 6 is connected to the additional unit 7 via the cable 8 and fixed above the additional unit 7. This is a standby state in which the connector 67 of the radio device 6 is connected to the connector 73 of the l;:
additional unit 7, so that the input and output of the voice circuit 601 of the radio device 6 are connected to the voice circuit 701 of the additional unit 7 via these connectors 67 and 73. The battery output voltage supplied via the power source cable 77 is converted by the power supply 702 of the additional unit 7 to predetermined voltages, which are then supplied via the coaxial cable 8 to the power supply 603 of the radio device 6, which power supply 603 supplies required voltages to the respective lZ93~71 circuits of the radio device 6. The power supply 702 also supplies a voltage to the battery 64 of the radio device 6 via connectors 67 and 73 to thereby charge the battery 64.
In the standby state, the antenna 66 o~ radio device 6 is accommodated within the radio device, so that the antenna changer 610 selects the vehicle-mounted antenna. Therefore, the transmitter 606 and receiver 607 are connected to the vehicle-mounted antenna 9 via the antenna changer 610 and coaxial cable 8.
When an incoming signal from a remote cable telephone or radio telephone apparatus is r~ceived by the antenna 9 via the base station, the received signal is amplified to constant power by the booster 700, the amplified signal is then input via the connector 704, cable 8, connector 604, antenna changer 610 and antenna duplexer 609 to the receiver 607 where the signal is demodulated. The dia~ number data contained in the demodulated signal is input to the control circuit 602, and compared with a dial number allocated beforehand to the radio device 6. When the comparison shows that both the dial numbers coincide, the control circuit 6~2 causes the voice circuit 601 to output a ringing tone signal.
This ringing tone signal is input via the connector 67 and 73 to the voice circuit 701 of the additional unit 7 and converted to a loud ringing tone generated from the speaker 74.
33C~7~1 When the user performs an off-hook switch operation at the control panel 60 of the radio device 6 in response to the ringing tone, the off-hook response signal is input via the transmitter 606 and coaxial cable 8 to the booster 700 of the additional unit 7 where the signal is amplified to constant power. The amplified signal is then transmitted toward the base station from the vehicle-mounted antenna 9. Thus a telephone communication path using a radio circuit is established via the base station to thereby enable telephone communication. When a voice signal from the remote apparatus is received by the antenna 9, the received voice signal is input to the receiver 607 via the same path as the incoming call signàl and demodulated by the receiver. The demodulated voice signal is input to the voice circuit 701 of the additional unit 7 via the voice circuit 601 and connectors 67 and 73.
The signal is then am~lified by the voice circuit 701 and broadcasted by the speaker 74.
When the user responds vocally to the voice signal from the remote apparatus, the user's voice is detected by the microphone 75 and input to the transmitter 606 via the voice circuit 701, connectors 73 and 67 and voice circuit 601. This signal becomes a modulation signal for the carrier and is converted to a high fre~uency signal which is then transmitted from the vehicle-mounted antenna 9 via the antenna changer 610, lZ93ÇI~1 a~ble 8 and boo~t~r 700.
The ~bove indic~te~ th~t telephvne communication ie m~de between the ra~io devlce 6 ~l~ced on the add~tion~l unit 7 and the remote a~paratue. If the radio dev~ce 6 18 remove~ from the addition~l unit 7 after the com~unicatlon ~sth wl~h the remote appar~tus le e6tablish~d, the connection between the connectore 73 and 67 i~ interru~ted. Therefore, only the telephone earpiece and mou~hplece 6Z and 63 are connected to the voice circult 601, ~o that telephone communlcatlon iB pos~ible using thQ~e tele~hone e~rpiece and mouth~iece 62 and 63.
Therefore, by ueing the ra~io de~ice 6 ~emove~
rom the sdditlonal unlt 7, it i8 pos~ible to ~alk about matter which ie not to be heard by the pa~senger~ in th~
vehicle.
Wh~n lt i~ de~lre~ to make A call from the radio device 6, ~n of-hook ~wltch ope~atlon i8 p~rformecl at the control panel 60 and,~,the oalled apparatu~ l& dlale~. A
~lgnal lndicatlve of the dlal number 1~ lnput vla the co~trol alrcult 602 ~o the tran~mlt~r 60~ where the signal 1~ oo~verted to a hlgh ~re~uency eignal and tran3mltted vi~ the anten~a ohan~er ~10, cable 8, and booster 700 ~rom the ~ntenn~ 9. When thie ~ignal i~
re~pon~ed by the c~lled devlce, a ~elephone com~un~catio~
p~th i~ eetabliehed in the ~me manner as when a~ lncoming aAll ie received, and telephone co~municatio~ oEIsible.
lZ93~
When the radio device 6 is to be used outside the vehicle, the cable 8 is disconnected from the connector 604 and the radio device 6 is removed from the vehicle. The antenna 66 is then extended so as to enable transmission and reception. By disconnection of the cable 8, the power source switch 605 switches the input to the power supply 603 to the battery 64. Thus, the power supply 603 generates power source voltages required by the respective circuits of the radio device 6 on the basis of the output voltage from the battery 64 and supplies the voltages to the circuits. On the other hand, by setting the antenna 66 in the transmission-reception enable state, the antenna changer 610 switches such that the antenna duplexer 609 is connected to the antenna 66.
Thus, a telephone communication signal and a call signal are transmitted and received via the antenna 66 to thereby enable telephone communication completely irrespective of the additional unit 7 in contrast with the manner in which the radio device 6 is used inside the vehicle.
If the telephone communication outside the vehicle is completed, the additional unit 7 is connected to the radio device 6 via the cable 8, the radio device 6 is placed on and fixed to the additional unit 7 for standby purposes.
1293~1 . A~ ~u~t describe~ a~ove, in the pa~tlcul~r ~mbodlment, the r~dlo devlce ~ ~nd additional unlt 7 are aonnected via the cable ~ Thu~ ~hen the radio device 6 i8 used inside the vehiale, hi~h ~requency ~l~nall~ from And to the txansmltter ~nd receiv~r o~ th~ r~dlo clevice 6 are tran~mittl3d and received vi~ the vehl~le-mounted anten~a 9 wherea~ whe~ the ~adlo device i~ uced outside the vehicle, the cable ~ is r~moved, high f requency signals from and to the tran~mitter and receiver are tran~mitted And reo~iv~d u~ln~ the Mnt0nna 66 of the radlo device 6 . ~here~ors, the conventional hand8et And rest therefor become unneces~ry to the~eby save a space therefor. ~
The loud~eaker or volce ampli~ication telephone ao~mun~ aatlon ~unotio~ 1~ provlded, 60 that telephone com~unlcation can be m~de without hindering the v~hlcle drivln~. ~he control panel 6~ used for tr~n~mltting ~nd recelving calls is dl~po~ed on the back ~lde of th~
telephone ear~ieae and mouthpleae 62 and 63, namely, on the top of the r~dlo devlce 6 ~he~ s~m~ ia plAaed on the ad~itlonal unit 7, ~o that operAtlons for tra~smitt.ing and reaeiving call~ are pe~formed without llftlng the r~dlo devioe ~. Thua this arr~ngement is v~ry convenient in op~abillty. When the vehicle-mounted antenna 9 i~ used, the ~ignal i~ ~mplified by the booster 700, ~o that hlgh-seneltivlty tele~hone commun~o~tion wlth ~ remote radio lZ93~71 a~paratufl i~ ~rovid~3d ~
~ ile power to the ra~io device 6 is supulied vlA the volce slgnal tran~mi~ion connector~ 67, 73 and the speclal-purpoAe c~bl~, it may be ~upplied vl~ ~he connector 704, cable 8 and conneator 604.
While the additional unit 7 ha~ the h~nd-free communicatlon function provided by the speaker 74, mlcro~hon~ 75 and voice clrcult 701, this fu~ction ma~ be ~ro~lded as n~ded.
While the antenn4 chan~er 610 determines which one o the ~ntenn~s 66 ~nd 9 s~ould be u~ed, it may lnoludea any a~nventlb~al deteotor which eleatrlcally, mechanically or optically detect~ whether th~ ante~na 6 i8 ln a tr~n~mi~sion ~nd reception ~n~ble ~tat0, and a switah switohed in accordance wlth th~ output ~rom the deteator, in8tead o~ the limlt ~witch ~hown ln ~ig. 3.
The power ~ource ~wltch 6~5 may inolude ~ny aonventional detector!5whlch electrically, mechanically or optically detect~ whether the cable 3 1~ conne¢ted to the oonnecto~ 6~4 and A switch Bwitched in ~ca~rdAnoe with the output from the ~et~ctor, ln~tead of the llmit ~witch ~hown in Flg. 4.
The ~rrangement o Fl~s. 1 an~ 2 may be modlfled such that the connector~ 67 and 73 ~re remov~d, and that the 6i~n~1~ which would otherwl~e b~ transmitted vi~ th0 con~ector3 67 and 73 should bs tran~mltted via the ~293(~71 connector 704, cable 8 and connector 604. Such structure is shown in Figs. 6 and 7 as another embodiment of the present invention.
In Fig. 6, connectors such as the connectors 67 and 73 of Fig. 1 are not used. A signal line similar to the line 8 passing through the connector 67 and 73 is accommodated in the coaxial cable 8 and the signals which would otherwise be transmitted via the connectors 67 and 73 are transmitted via the cable 8.
Fig. 7 shows in a block diagram the detailed structure oE the radio device 6 and vehicle-mounted additional unit 7 in the particular embodiment. In Fig.
7, connectors such as the connectors 67 and 73 are not used. Signals such as those transmitted through the connectors 67 and 73 are transmitted through the connector 704, cable 8 and connector 604. As shown in Fig. 8, the coaxial cable 8 inclu~des a 6-core cable which comprises a ground potential line 80, a high frequency signal line 81, a control signal line 82, a power source voltage line 83, and voice signal lines 84, 85.
It 18 therefore an object o the pre~Qnt lnvention to provide A radio telephone apparatus which occupies a smAll in~talla~ion space in a vehicle suoh as an automoblle.
SUMMARY 0~ T~IE INVENTION ~
The pre6ent inventlon provlde~ ~ radio telephone apparat~ compri~lng ~n additlonal unit connecting ~ fi~st transmlsslon-r~ceptlon antenn~ theretol a portable r.~dlo device conneoted remov~bly via a coaxial oable ~o the a~ditional unit and i~cluding a second tran~mi~lon--reoe~tion antenna and a radlo unitJ and tran~mi~iorl-reception antenna changlng mean~ connecting the radlo unlt to the ~lr~t trAn~mi~slon-recep~lon anten~a vla the coaxial aable when the ~adio device i8 conn~cte~ to the addltional unlt and for aonneoting the radio unlt to the second transmi~ion-rece~tion antenna when the radio device is removed ~rom the additional u~it.
The pre~ent invention achieves the ~bove ob~ect 1~3~
by ~roviding a radio t~lephone apparatu~ which inc].ude~ A
portable r~dio device hAving ~n accommodatable or t~le~copic tran~mls~ion and receptlon antenna, an addltional unlt mounted in the vehicle, a tran~ ion and rece~tion antenna fixed to the vehicle, ~d a remuvable ao~xial cable oonne~ting the portable radio device and Addltional unlt~ The r~dio tlevice includes a control panel for perPormlng operations to ~lace and reaelve callts, a tel~phone mou~hpiece and ~ar~i~ce ~nd ~ voice clrouit for telephone communication, a battery for ~eedlng power to the respectlve ~egulred el~ment~ o~ the ~paratu~, and a tran~mltter-rec~lver unit for tran8mittlng and recelving, by radio, a telephont~
¢ommunlcat~on ~ignal to and from another radio a~p~r.atu~
u~ing one of the accommodatable or ~ixed tr~nsmis6it)n-reoeption antenna~. The additlon~l unit l~clude~ a ra~t m~chani~m fo~ resting thereon the portable ~adio de~ice removably. ~.
The portable radio devlc~ ls u~ually fixed by the rest mt~ch~ni~m o~ the addltional unlt and connected to the tr~n3ml86ion-reception ant~nn~ fl~ed to the vehicle ~1A the coaxl~l cable. Under ~uch conditions, if there i~
an lncomlng call, the ~ecelved signal from the tran~mls610n-recQption antenna ~ixed to the ~ehlcle 1B
ln~ut to the tr~n~mltter-receiver unlt o~ the portable rAdio de~lce via the coaxial c~ble and demodulat~d ~Z93C37i thereby. ~y the aff-hook o~eration at the rAdlo device, a communic~tion pa~h with th~ aalliny app~ratus i~
establlshed via the transmi~ion-rece~tion ~ntenna flxed to the vehiale, and telephone ommunication 1~ pos~3ible u~ing the telephone mouthpiece ~nd ear~iece of the portabl~ radio devlce.
When the portable radio devlce i~ to be u~ed out~lde ~he vehiale, the coaxiaL cable i~ removed, the t~ns~i~ion-reception antenna of the radio device i~
pl~ced in a tx~nsmi~lon-reception ena~le ~tate ~nd a calling operatlon or an lncomlng call proaesslng operatlon i~ pe~for~ed. In thi~ o~e, a tele~hone co~unlcation p~th 18 0 tabll~hed ~ia the tr~nsmi~sion-reception antenn~
of the radio devlce and t~lephone communlcation 1~
~ossible vi~ th~ telephone mouthpiece and earplece.
A~ just de8cribed above, the port~ble radio device 1~ used ag ~ telephone handset ln common fo~
communication both in~'lde an~ o~t~lde the vehlcl~, ~nd only one of the tran~mls~ion-receptlon antenn~ ~ixe~ to the vehicle or the tran~mi~slon-rece~tion ~ntenna o~ the portable ~sdlo device 18 ~elected ln u~e. ~hus the convention~l handaet and the cr~dle th~refor a~e not re~ulred, 80 that thelr s~ce iB 8aved which would otherwi~e be needed. The~efo~e, the selectlon of the pla¢e where the telephone a~p~ratu8 i3 in8 talled i8 Vflrv ea~y .
~293~'7i BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a perspective view of one embodiment of the present invention;
Fig. 2 is a circuit block diagram showing the detailed structure of a portable radio device and a vehicle-mounted additional unit;
Fig. 3 is a schematic showing a specific example of an antenna changer;
Fig. 4 is a schematic showing a specific example of a power source switch;
Fig. 5 is a cross section view of a cable used in the embodiment;
Fig. 6 is a perspective view of a further embodiment;
Fig. 7 is a circuit block diagram showing the detailed structure of a portable radio device and a vehicle-mounted addit~ional unit in the further embodiment;
Fig. 8 is a cross section schematic of a cable used in the further embodiment; and Fig. 9 is a block diagram showing the structure of a conventional radio telephone apparatus.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Fig. 1 is a schematic showing one embodiment of the present invention, and mainly includes a portable radio device 6, a vehicle-mounted additional unit 7, a coaxial cable 8, a vehicle-mounted transmission and lZ93~
~ 9 _ receptiGn ~ntenna 9.
The r~dio device G lnclude~ ~ control p~lnel 60 whioh i8 operated te transmit and rec~31v~ cAll~ di~pl~y 61 which dis~lay~ ~ dial nu~ber used $or tranBmitting A
call, ~ telephone ear~iece 62, a tel~phona mouth~iece 63, ~ charge~ble battery 64, a connector 65 for the coaxial c~ble 8, an accommodatable tel~copic snt~nna G6, and tr~ns~itter, ~ recelver and ~ voic~ alrcuit pro~ided therein to be ~escribed l~te~ in more detail.
Th~ ~dditional unit 7 ha~ a pair of re~lllent pawls 70 and 71 engageable in valley~ in the radio device body between the tele~hone earpiece ~nd mouthpiQce 62 ~nd 63 o~ the ra~io ~evice 6 to fix ~me, a disenga~ln5~ unlt 72 which disengages pawl~ 70 and 71 from the valley~, conn~ctor 73 connected to a connector 67 flxed to the telephon~ mouthpieo~ and recelver surface of the radio device 6, ~ ~poaker 74 and a micropho~e 75 ~or hand-fre~
oper~tlon, ~n a~tenna~9 connected via an antenna c~ble 76 to the ~dl~ion~l unit, ~nd a power ~ble 77 receiYlng battery power for the ~utom~bile.
~ he rAdlo device 6 iB u~ually fixed by the r~llient pawls 70 and 71 when pl~ced o~ the additlonal unit 7. At ~hi~ time, the oonnectors 73 ~nd 67 a~e connected and A ch~rgl~g current is ~u~plied via the connector~ 73 and 67 to the battQry 6~ of the rAdlo devlce 1~3~'71 1, and the input to and output from the voice circuit of the radio device 6 are connected to the microphone 75 and speaker 74 of the additional uni-t 7 via connectors 73 and 67.
Fig. 2 is a c.ircuit block diagram showing the detailed structure of the radio device 6 and additional unit 7. The radio device 6 includes a transmitter-receiver unit 600, a voice circuit 601, a control circuit 602, a battery 64 or a power supply 603 which converts a power source voltage supplied from the additional unit 7 via the coaxial cable 8, to voltages used by the respective circuit elements of the radio device 6, a connector 604 for the coaxial cable 8, and a power source switch 605 which selects one of the output from the battery 64 and the power source voltage from the additional device 7 and supplies the selected voltage to the power supply 603.~.
The transmitter-receiver unit 600 includes a transmitter 606, a receiver 607, a synthesizer 608 which sets the frequencies used for the transmitter and receiver 606 and 607, an antenna duplexer 609, and an antenna changer 610 which selects one of the antenna 9 and a radio device antenna 66 and connects the selected one to the antenna duplexer 609.
The antenna changer 610 includes a limit switch which, for example, senses the state in which the antenna ~293~'71 66 is accommodated, as shown in Fig. 3, and connects the antenna 66 to the duplexer 609 only when the antenna 66 is extended for transmission and reception purposes.
The power source switch 605 includes a limit switch which is operated, for example, when -the coaxial cable 8 is attached to the connector 604, as shown in Fig.
4, to connect the input to the power supply 603 to the additional device.
In addition to the input to the power supply 603, a control signal line of the control circuit 602, a high frequency signal line to the antenna changer 610 and a ground potential line are connected to the connector 604. Therefore, as shown in Fig. 5, the coaxial cable 8 includes a 4-core cable which includes a ground potential line 80, a high frequency signal line 81, a control signal line 82 and a power source voltage line 83. A control signal is transmitted and received in a serial manner between the control circuit 602 of the radio device 6 and the control circuit 703 of the additional unit 7 via the control line 82.
The additional unit 7 includes a booster 700 which amplifies to predetermined power high frequency signals transmitted and received via the antenna 9, a voice circuit 701 connected between the connector 73 and the speaker 74, microphone 75~ a power supply 702 which converts a direct current voltage from a vehicle-mounted battery B to predetermined voltages which are then supplied to the respective circuits of the additional unit and supplies a voltage to the portable radio device via the coaxial cable 8, a control circuit 703 which controls the booster 700 and voice circuit 701, and a connector 704 connected to the coaxial cable 8.
The booster 700 includ~s antenna duplexers 705, 706, a reception amplifier 707, a transmission power amplifier 708, and an automatic power control circuit (APC) 709 which controls the output level of the transmission power amplifier.
In the arrangement, the additional unit 7 is fixed close to the driver's seat in the vehicle, and the radio device 6 is connected to the additional unit 7 via the cable 8 and fixed above the additional unit 7. This is a standby state in which the connector 67 of the radio device 6 is connected to the connector 73 of the l;:
additional unit 7, so that the input and output of the voice circuit 601 of the radio device 6 are connected to the voice circuit 701 of the additional unit 7 via these connectors 67 and 73. The battery output voltage supplied via the power source cable 77 is converted by the power supply 702 of the additional unit 7 to predetermined voltages, which are then supplied via the coaxial cable 8 to the power supply 603 of the radio device 6, which power supply 603 supplies required voltages to the respective lZ93~71 circuits of the radio device 6. The power supply 702 also supplies a voltage to the battery 64 of the radio device 6 via connectors 67 and 73 to thereby charge the battery 64.
In the standby state, the antenna 66 o~ radio device 6 is accommodated within the radio device, so that the antenna changer 610 selects the vehicle-mounted antenna. Therefore, the transmitter 606 and receiver 607 are connected to the vehicle-mounted antenna 9 via the antenna changer 610 and coaxial cable 8.
When an incoming signal from a remote cable telephone or radio telephone apparatus is r~ceived by the antenna 9 via the base station, the received signal is amplified to constant power by the booster 700, the amplified signal is then input via the connector 704, cable 8, connector 604, antenna changer 610 and antenna duplexer 609 to the receiver 607 where the signal is demodulated. The dia~ number data contained in the demodulated signal is input to the control circuit 602, and compared with a dial number allocated beforehand to the radio device 6. When the comparison shows that both the dial numbers coincide, the control circuit 6~2 causes the voice circuit 601 to output a ringing tone signal.
This ringing tone signal is input via the connector 67 and 73 to the voice circuit 701 of the additional unit 7 and converted to a loud ringing tone generated from the speaker 74.
33C~7~1 When the user performs an off-hook switch operation at the control panel 60 of the radio device 6 in response to the ringing tone, the off-hook response signal is input via the transmitter 606 and coaxial cable 8 to the booster 700 of the additional unit 7 where the signal is amplified to constant power. The amplified signal is then transmitted toward the base station from the vehicle-mounted antenna 9. Thus a telephone communication path using a radio circuit is established via the base station to thereby enable telephone communication. When a voice signal from the remote apparatus is received by the antenna 9, the received voice signal is input to the receiver 607 via the same path as the incoming call signàl and demodulated by the receiver. The demodulated voice signal is input to the voice circuit 701 of the additional unit 7 via the voice circuit 601 and connectors 67 and 73.
The signal is then am~lified by the voice circuit 701 and broadcasted by the speaker 74.
When the user responds vocally to the voice signal from the remote apparatus, the user's voice is detected by the microphone 75 and input to the transmitter 606 via the voice circuit 701, connectors 73 and 67 and voice circuit 601. This signal becomes a modulation signal for the carrier and is converted to a high fre~uency signal which is then transmitted from the vehicle-mounted antenna 9 via the antenna changer 610, lZ93ÇI~1 a~ble 8 and boo~t~r 700.
The ~bove indic~te~ th~t telephvne communication ie m~de between the ra~io devlce 6 ~l~ced on the add~tion~l unit 7 and the remote a~paratue. If the radio dev~ce 6 18 remove~ from the addition~l unit 7 after the com~unicatlon ~sth wl~h the remote appar~tus le e6tablish~d, the connection between the connectore 73 and 67 i~ interru~ted. Therefore, only the telephone earpiece and mou~hplece 6Z and 63 are connected to the voice circult 601, ~o that telephone communlcatlon iB pos~ible using thQ~e tele~hone e~rpiece and mouth~iece 62 and 63.
Therefore, by ueing the ra~io de~ice 6 ~emove~
rom the sdditlonal unlt 7, it i8 pos~ible to ~alk about matter which ie not to be heard by the pa~senger~ in th~
vehicle.
Wh~n lt i~ de~lre~ to make A call from the radio device 6, ~n of-hook ~wltch ope~atlon i8 p~rformecl at the control panel 60 and,~,the oalled apparatu~ l& dlale~. A
~lgnal lndicatlve of the dlal number 1~ lnput vla the co~trol alrcult 602 ~o the tran~mlt~r 60~ where the signal 1~ oo~verted to a hlgh ~re~uency eignal and tran3mltted vi~ the anten~a ohan~er ~10, cable 8, and booster 700 ~rom the ~ntenn~ 9. When thie ~ignal i~
re~pon~ed by the c~lled devlce, a ~elephone com~un~catio~
p~th i~ eetabliehed in the ~me manner as when a~ lncoming aAll ie received, and telephone co~municatio~ oEIsible.
lZ93~
When the radio device 6 is to be used outside the vehicle, the cable 8 is disconnected from the connector 604 and the radio device 6 is removed from the vehicle. The antenna 66 is then extended so as to enable transmission and reception. By disconnection of the cable 8, the power source switch 605 switches the input to the power supply 603 to the battery 64. Thus, the power supply 603 generates power source voltages required by the respective circuits of the radio device 6 on the basis of the output voltage from the battery 64 and supplies the voltages to the circuits. On the other hand, by setting the antenna 66 in the transmission-reception enable state, the antenna changer 610 switches such that the antenna duplexer 609 is connected to the antenna 66.
Thus, a telephone communication signal and a call signal are transmitted and received via the antenna 66 to thereby enable telephone communication completely irrespective of the additional unit 7 in contrast with the manner in which the radio device 6 is used inside the vehicle.
If the telephone communication outside the vehicle is completed, the additional unit 7 is connected to the radio device 6 via the cable 8, the radio device 6 is placed on and fixed to the additional unit 7 for standby purposes.
1293~1 . A~ ~u~t describe~ a~ove, in the pa~tlcul~r ~mbodlment, the r~dlo devlce ~ ~nd additional unlt 7 are aonnected via the cable ~ Thu~ ~hen the radio device 6 i8 used inside the vehiale, hi~h ~requency ~l~nall~ from And to the txansmltter ~nd receiv~r o~ th~ r~dlo clevice 6 are tran~mittl3d and received vi~ the vehl~le-mounted anten~a 9 wherea~ whe~ the ~adlo device i~ uced outside the vehicle, the cable ~ is r~moved, high f requency signals from and to the tran~mitter and receiver are tran~mitted And reo~iv~d u~ln~ the Mnt0nna 66 of the radlo device 6 . ~here~ors, the conventional hand8et And rest therefor become unneces~ry to the~eby save a space therefor. ~
The loud~eaker or volce ampli~ication telephone ao~mun~ aatlon ~unotio~ 1~ provlded, 60 that telephone com~unlcation can be m~de without hindering the v~hlcle drivln~. ~he control panel 6~ used for tr~n~mltting ~nd recelving calls is dl~po~ed on the back ~lde of th~
telephone ear~ieae and mouthpleae 62 and 63, namely, on the top of the r~dlo devlce 6 ~he~ s~m~ ia plAaed on the ad~itlonal unit 7, ~o that operAtlons for tra~smitt.ing and reaeiving call~ are pe~formed without llftlng the r~dlo devioe ~. Thua this arr~ngement is v~ry convenient in op~abillty. When the vehicle-mounted antenna 9 i~ used, the ~ignal i~ ~mplified by the booster 700, ~o that hlgh-seneltivlty tele~hone commun~o~tion wlth ~ remote radio lZ93~71 a~paratufl i~ ~rovid~3d ~
~ ile power to the ra~io device 6 is supulied vlA the volce slgnal tran~mi~ion connector~ 67, 73 and the speclal-purpoAe c~bl~, it may be ~upplied vl~ ~he connector 704, cable 8 and conneator 604.
While the additional unit 7 ha~ the h~nd-free communicatlon function provided by the speaker 74, mlcro~hon~ 75 and voice clrcult 701, this fu~ction ma~ be ~ro~lded as n~ded.
While the antenn4 chan~er 610 determines which one o the ~ntenn~s 66 ~nd 9 s~ould be u~ed, it may lnoludea any a~nventlb~al deteotor which eleatrlcally, mechanically or optically detect~ whether th~ ante~na 6 i8 ln a tr~n~mi~sion ~nd reception ~n~ble ~tat0, and a switah switohed in accordance wlth th~ output ~rom the deteator, in8tead o~ the limlt ~witch ~hown ln ~ig. 3.
The power ~ource ~wltch 6~5 may inolude ~ny aonventional detector!5whlch electrically, mechanically or optically detect~ whether the cable 3 1~ conne¢ted to the oonnecto~ 6~4 and A switch Bwitched in ~ca~rdAnoe with the output from the ~et~ctor, ln~tead of the llmit ~witch ~hown in Flg. 4.
The ~rrangement o Fl~s. 1 an~ 2 may be modlfled such that the connector~ 67 and 73 ~re remov~d, and that the 6i~n~1~ which would otherwl~e b~ transmitted vi~ th0 con~ector3 67 and 73 should bs tran~mltted via the ~293(~71 connector 704, cable 8 and connector 604. Such structure is shown in Figs. 6 and 7 as another embodiment of the present invention.
In Fig. 6, connectors such as the connectors 67 and 73 of Fig. 1 are not used. A signal line similar to the line 8 passing through the connector 67 and 73 is accommodated in the coaxial cable 8 and the signals which would otherwise be transmitted via the connectors 67 and 73 are transmitted via the cable 8.
Fig. 7 shows in a block diagram the detailed structure oE the radio device 6 and vehicle-mounted additional unit 7 in the particular embodiment. In Fig.
7, connectors such as the connectors 67 and 73 are not used. Signals such as those transmitted through the connectors 67 and 73 are transmitted through the connector 704, cable 8 and connector 604. As shown in Fig. 8, the coaxial cable 8 inclu~des a 6-core cable which comprises a ground potential line 80, a high frequency signal line 81, a control signal line 82, a power source voltage line 83, and voice signal lines 84, 85.
Claims (15)
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A radio telephone apparatus comprising:
an additional unit connecting a first transmission-reception antenna thereto;
a portable radio device connected removably via a coaxial cable to the additional unit and including a second transmission-reception antenna and a radio unit;
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.
an additional unit connecting a first transmission-reception antenna thereto;
a portable radio device connected removably via a coaxial cable to the additional unit and including a second transmission-reception antenna and a radio unit;
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.
2. 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.
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.
3. 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.
4. 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.
5. 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.
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.
6. 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.
7. 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.
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.
8. 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 .
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 .
9. 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.
10. 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.
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.
11. 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.
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.
12. 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.
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.
13. 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.
14. 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.
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.
15. 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.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000578508A CA1293071C (en) | 1988-09-27 | 1988-09-27 | Radio telephone apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000578508A CA1293071C (en) | 1988-09-27 | 1988-09-27 | Radio telephone apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1293071C true CA1293071C (en) | 1991-12-10 |
Family
ID=4138792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000578508A Expired - Lifetime CA1293071C (en) | 1988-09-27 | 1988-09-27 | Radio telephone apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1293071C (en) |
-
1988
- 1988-09-27 CA CA000578508A patent/CA1293071C/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |