Telephone hand-free apparatus
First Claim
1. A telephone hand-free apparatus for use with a portable telephone which has a microphone and a speaker installed therein, said hand-free apparatus comprising:
- a cylindrical can;
a telephone receiving case installed in said cylindrical can, said telephone receiving case being so sized and constructed as to receive therein said portable telephone;
a board on which a control circuit is arranged, said board being installed in said cylindrical can;
an external microphone operatively connected to said control circuit and exposed to the outside of said cylindrical can;
an external speaker operatively connected to said control circuit and installed in said cylindrical can;
a connection cable means extending from said control circuit, so that when said connection cable means is connected to a socket means of said portable telephone, said external microphone and said external speaker become operative in place of the microphone and the speaker of said portable telephone; and
an electric power source which energizes said control circuit, wherein said control circuit includes a muting section which makes said external microphone inoperative while said control circuit is receiving a voice signal from said portable telephone through said connection cable means.
2 Assignments
0 Petitions
Accused Products
Abstract
A telephone hand-free apparatus comprises a housing; a telephone receiving case installed in the housing, the telephone receiving case being so sized and constructed as to receive therein a portable telephone; a board on which a control circuit is arranged, the board being installed in the housing; an external microphone operatively connected to the control circuit and exposed to the outside of the housing; an external speaker operatively connected to the control circuit and installed in the housing; a connection cable extending from the control circuit, so that when the connection cable is connected to a socket of the portable telephone, the external microphone and the external speaker become operative in place of a microphone and a speaker of the portable telephone; and an electric power source which energizes the control circuit. The control circuit includes a muting section which makes the external microphone inoperative while the control circuit is receiving a voice signal from the portable telephone through the connection cable.
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Citations
20 Claims
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1. A telephone hand-free apparatus for use with a portable telephone which has a microphone and a speaker installed therein, said hand-free apparatus comprising:
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a cylindrical can;
a telephone receiving case installed in said cylindrical can, said telephone receiving case being so sized and constructed as to receive therein said portable telephone;
a board on which a control circuit is arranged, said board being installed in said cylindrical can;
an external microphone operatively connected to said control circuit and exposed to the outside of said cylindrical can;
an external speaker operatively connected to said control circuit and installed in said cylindrical can;
a connection cable means extending from said control circuit, so that when said connection cable means is connected to a socket means of said portable telephone, said external microphone and said external speaker become operative in place of the microphone and the speaker of said portable telephone; and
an electric power source which energizes said control circuit, wherein said control circuit includes a muting section which makes said external microphone inoperative while said control circuit is receiving a voice signal from said portable telephone through said connection cable means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
a cable extending from said control circuit; and
a 3P-plug connected to a leading end of said cable, said 3P-plug being detachably connectable to an input/output socket mounted on said portable telephone.
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20. A telephone hand-free apparatus for use with a portable telephone which has a microphone and a speaker installed therein, said telephone hand-free apparatus comprising:
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a cylindrical housing;
a telephone receiving case detachably installed in said cylindrical housing, said telephone receiving case being so sized and constructed as to detachably receive said portable telephone;
a board on which a control circuit is arranged, said board being received in said cylindrical housing and connected to a part of said telephone receiving case;
an external microphone operatively connected to said control circuit and exposed to the outside of said cylindrical housing;
an external speaker operatively connected to said control circuit and installed in said cylindrical housing;
a connection cable means extending from said control circuit, so that when said connection cable means is connected to a socket means of said portable telephone, said external microphone and said external speaker become operative in place of the microphone and the speaker of said portable telephone;
a battery for energizing said control circuit;
an electromagnetic wave shielding plate installed in said cylindrical housing in a manner to cover an exposed outer surface of said control circuit; and
condensers through which a wire from said external microphone and wires of said connection cable means are connected to said shielding plate, wherein said control circuit includes;
a muting section which makes said external microphone inoperative while said control circuit is receiving a voice signal from said portable telephone through said connection cable means; and
a power saving section which saves an electric power of the battery fed to said control circuit during the time when the portable telephone is in a stand-by condition.
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Specification