Telephonic communications – Terminal – Housing or housing component
Reexamination Certificate
1998-12-08
2001-12-11
Chiang, Jack (Department: 2642)
Telephonic communications
Terminal
Housing or housing component
Reexamination Certificate
active
06330331
ABSTRACT:
TECHNICAL FIELD
The present invention relates generally to a portable telephone, and more particularly to the structure of a case of a portable telephone having a cover. In the following description, it is to be noted that the term portable telephone used herein also includes a general cordless telephone.
BACKGROUND ART
An ultimate object of communication is, of course, to enable information to be transmitted or exchanged at once anytime, from anywhere, and by anybody. In addition to conventional intercommunication between fixed points, a mobile communication has been gradually developed. Mobile communication means a communication between a mobile body such as ship, automobile, or airplane (including a human being) and a fixed point such as home or office, and also means an intercommunication between two mobile bodies. In recent years, a portable telephone or a cordless telephone as a kind of means for carrying out the mobile communication has been extensively developed.
In general, a telephone is used with a receiver section put to the ear and a transmitter section kept near the mouth. So also in a portable telephone, it is necessary to ensure a sufficient distance between the receiver section and the transmitter section. In this circumstance, a conventional portable telephone itself is relatively long and large in size.
A portable telephone having a foldable cover for protecting a switch section of the portable telephone is known. In this portable telephone, a microphone is provided in the cover so as to ensure a sufficient distance between a speaker and the microphone.
In the above described conventional portable telephone, the distance between the receiver section and the transmitter section, both provided in a telephone body, is set to be substantially equal to the distance between the ear and the mouth of a user. Accordingly, such portable telephone cannot be made sufficiently compact. A manufacturing technology for parts constituting the portable telephone has been advanced to supply compact and inexpensive parts. In this viewpoint only, a compact portable telephone can be manufactured relatively easily. However, since there exists a human engineering demand that the distance between the receiver section and the transmitter section should be substantially equal to that between the ear and the mouth, this demand causes a hindrance in practically manufacturing a compact portable telephone.
Further, in the conventionally proposed portable telephone having a foldable cover, since the microphone is provided in the cover, a microphone cord is liable to break due to repeated opening and closing operation of the cover.
It is accordingly an object of the present invention to provide a portable telephone which can ensure a sufficient distance between the receiver section and the transmitter section during telephonic communication regardless of the compact construction of the telephone body.
It is another object of the present invention to provide a portable telephone which can protect the switch section in an inoperative condition and improve an S/N characteristic in the transmitter section when in an operative condition.
DISCLOSURE OF THE INVENTION
According to the present invention, there is provided a portable telephone comprising a body including a speaker, a microphone, and switch means; a cover rotatably mounted to said body, said cover covering at least said switch means when said cover is in a closed condition; and cover holding means for rotatably holding said cover with respect to said body, said cover holding means including biasing means for exerting a biasing force to said cover so as to maintain said cover at a stable position in a rotational direction when said cover is in an open condition.
Preferably, the cover holding means comprises a cover mounting projection integrally formed with said body and having a pair of holes; a pair of shafts rotatably inserted through said holes, respectively, each of said shafts having one end fixed to said cover and having a plate portion to near other end; and a pair of U-shaped springs fixed to said body so as to respectively nip said plate portions of said shafts.
In using the portable telephone, when the cover is opened, it is held in a stable position where the cover is inclined at a predetermined angle (e.g., 145°) with respect to the body by the cover holding means. In this stable position, the cover also functions as a voice reflecting and collecting board.
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Nishiyama Akihide
Suzuki Hideharu
Takagi Hisamitsu
Tomura Massashi
Chiang Jack
Fujitsu Limited
Staas & Halsey , LLP
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