Wristwatch radio communication device having an improved noise shielding structure
First Claim
1. A wristwatch communication device for processing signals comprising:
- a body portion;
a wristband portion for fastening around a user'"'"'s wrist and secured to said body portion;
an electrically conductive plate formed in said wristband portion to form a loop antenna for one of receiving and transmitting signals when fastened around said user'"'"'s wrist;
first circuit means accommodated in said body portion for at least one of receiving and transmitting said signals, said loop antenna being operatively coupled to said first circuit means;
second circuit means accommodated in said body portion for operating on said signals;
noise shielding means for shielding said first circuit means from said second circuit means wherein said first circuit means, said noise shielding means and said second circuit means are arranged in that order in the thickness direction of the device, so that said noise shielding means isolates said first circuit means from said second circuit means, said first circuit means being operatively coupled to said second circuit means at least in part by said noise shielding means;
first engaging means for mechanically coupling said first circuit means to said noise shielding means, including at least one first projection on one of said noise shielding means and said first circuit means and at least one first engaging hole on the other of said noise shielding means and said first circuit means for receiving a first projection; and
second engaging means for mechanically coupling said second circuit means and said noise shielding means and including at least one second projection on one of said holes shielding means and said second circuit means, and at least one second engaging hole on the other of said noise shielding means and said first circuit means for receiving a second projection.
1 Assignment
0 Petitions
Accused Products
Abstract
A portable radio communication device such as wristwatch receiver and/or transmitter is provided with an effective noise shielding structure. The portable radio communication device includes a high frequency analog circuitry for receiving and transmitting radio signals and further includes digital circuitry for data processing and display. The noise shielding structure protects high frequency noise from being transmitted to the analog circuitry from the digital circuitry and from other outside sources. The noise shielding structure is made of electrically conductive material. In another aspect of the invention, at least one circuit board constructed of a multi-layered construction having at least one inner printed wire pattern is provided. The inner printed wire pattern is set at ground potential with respect to the high frequency output from the analog circuitry. In this manner the inner printed wire pattern serves as a noise shielding member. In addition, the invention obtains effective noise shielding without increasing the size or the manufacturing cost of the device.
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Citations
43 Claims
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1. A wristwatch communication device for processing signals comprising:
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a body portion; a wristband portion for fastening around a user'"'"'s wrist and secured to said body portion; an electrically conductive plate formed in said wristband portion to form a loop antenna for one of receiving and transmitting signals when fastened around said user'"'"'s wrist; first circuit means accommodated in said body portion for at least one of receiving and transmitting said signals, said loop antenna being operatively coupled to said first circuit means; second circuit means accommodated in said body portion for operating on said signals; noise shielding means for shielding said first circuit means from said second circuit means wherein said first circuit means, said noise shielding means and said second circuit means are arranged in that order in the thickness direction of the device, so that said noise shielding means isolates said first circuit means from said second circuit means, said first circuit means being operatively coupled to said second circuit means at least in part by said noise shielding means; first engaging means for mechanically coupling said first circuit means to said noise shielding means, including at least one first projection on one of said noise shielding means and said first circuit means and at least one first engaging hole on the other of said noise shielding means and said first circuit means for receiving a first projection; and second engaging means for mechanically coupling said second circuit means and said noise shielding means and including at least one second projection on one of said holes shielding means and said second circuit means, and at least one second engaging hole on the other of said noise shielding means and said first circuit means for receiving a second projection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A wristwatch device for processing signals comprising:
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first circuit means for at least one of receiving and transmitting said signals; second circuit means for operating on said signals; noise shielding means for shielding said first circuit means from said second circuit means wherein said first circuit means, said noise shielding means and said second circuit means are arranged in that order in the thickness direction of the device, so that said noise shielding means isolates said first circuit means from said second circuit means;
said first circuit means being operatively coupled to said second circuit means at least in part by said noise shielding means;a body portion for accommodating said first circuit means, said second circuit means and said noise shielding means; and a wristband portion secured to said body portion for fastening around a user'"'"'s wrist, said wristband portion including an electrically conductive plate integrally formed therein forming a loop antenna for at least one of receiving and transmitting radio signals when fastened around said user'"'"'s wrist; wherein said second circuit means is positioned so as to be substantially outside said loop antenna.
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18. A wristwatch radio communication device for processing signals comprising:
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a body portion; a wristband portion for fastening around a user'"'"'s wrist attached to said body portion; a circuit assembly accommodated in said body portion; antenna means coupled for at least one of receiving and transmitting said signals coupled to said wristband portion; said body portion including a first casing member and a second casing member attached to said first casing member to form a hollow center for accommodating said circuit assembly, said second casing member being directed towards said user'"'"'s wrist when fastened to said user'"'"'s wrist; said circuit assembly further including a circuit board having a multi-layered construction including at least one inner printed wire pattern, first circuit means for at least on part performing one of receiving and transmitting said signals mounted on a first surface of said circuit board directed towards said second casing member of said body portion, second circuit means for data processing disposed on a second surface of said circuit board directed toward said first casing member of said body portion and power source means having at least a first pole and a second pole for supplying power to said wristwatch radio communication device, said first and second casing members together enclosing said circuit assembly; said second casing member being constructed of an electrically conductive material operatively coupled to at least one of said first pole and said second pole of said power source means; and said inner printed wire pattern being operatively coupled to at least one of said first and said second pole of said power source means. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A wristwatch radio communication device for processing signals comprising:
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a body portion; a wristband portion for fastening around a user'"'"'s wrist attached to said body portion; a circuit assembly accommodated in said body portion; antenna means for at least one of receiving and transmitting said signals coupled to said wristband portion; said body portion including a first casing member and a second casing member attached to said first casing member to form a hollow center for accommodating said circuit assembly, said second casing member directed towards said user'"'"'s wrist when fastened to said user'"'"'s wrist; said circuit assembly further including a first circuit board having a multi-layered construction with at least one inner printed wire pattern, a second circuit board having a multi-layered construction with at least one inner printed wire pattern disposed between said first circuit board and said first casing member of said body portion, first circuit means for at least one of receiving and transmitting said signals mounted on said first circuit board on the side thereof facing aid second casing member, second circuit means for data processing and display means displaying information from said signals mounted on said second circuit board on the side thereof facing away from said first circuit board, power source means having at least a first pole and a second pole for supplying power to said wristwatch radio communication device disposed between said first circuit board and said second casing member, and first electrical conductive means positioned for controlling the potential between said first circuit board and said second circuit board for providing noise shielding therebetween; said second casing member being constructed of electrically conductive material coupled to at least one of said first pole and said second pole of said power source means; said inner printed wire patterns of said first circuit board and said second circuit board being operatively coupled to at least one of said first pole and said second pole of said power source means; and said first electrical conductive means being operatively coupled to at least one of said first pole and said second pole of said power source means. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification