Portable telephone set

Abstract: A rod antenna is contained at an angle in a housing case, such that a top of the rod antenna is positioned on the side of the housing case remote from a user's head, and a bottom of the rod antenna is on the side of the housing case near the user's head. The remote and near sides are opposite to each other. When the rod antenna is pulled up out of the housing case, the rod antenna is inclined away from the user's head.

Description: FIELD OF THE INVENTION This invention relates to a portable telephone set, and more particularly to, a portable telephone set having a rod antenna containable in a housing case. BACKGROUND OF THE INVENTION A conventional portable telephone set is constructed to contain a transmission and reception unit for transmitting a speech signal of a user (caller or callee) via a rod antenna and receiving a transmitted signal from the rod antenna, and a speaker unit for converting the received electric signal to a sound signal to be heard by the user, all in a housing case. The housing case is provided with a speaker portion in the inside of which the speaker unit is positioned, and a microphone portion in the inside of which a microphone unit for converting speech to an electric signal to be supplied to the transmission unit is positioned. The rod antenna is contained in the housing case to be pulled out in a direction parallel to a side plane of the housing case in operation and pushed thereinto in the inoperative state. In operation, the rod antenna is pulled out from the housing case, and a switch is turned on, respectively, by the user, so that the transmission and reception of telephone signals is effected via the rod antenna. In this operation state, the housing case is held vertically by the user, such that the speaker portion is in contact with an ear of the user, and the microphone portion is in the vicinity of a mouth of the user. Consequently, the rod antenna extends vertically to be partially positioned against the side of a head of the user. In the conventional portable telephone set, however, there is a disadvantage in that electric signals transmitted from and received by the rod antenna are absorbed by the head of the user, thereby resulting in the decrease in gain of the rod antenna. As a result, the range of the portable telephone set is reduced. Further, there is the possibility that a line connection will be interrupted or terminated if the antenna comes into contact with the ear of the user, even if the telephone set has been turned on by receiving a call signal. SUMMARY OF THE INVENTION Accordingly, it is an object of the invention to provide a portable telephone set in which a rod antenna pulled out from a housing case is not in contact with a head of a user. It is a further object of the invention to provide a portable telephone set in which a rod antenna is pulled out to extend away from the head of a user. It is a still further object of the invention to reduce the possibility of impaired range due to proximity of the antenna to the user's head, and to provide a portable telephone set which the interruption or termination of a connection due to contact with the user's ear is reduced. In one aspect the invention provides a portable telephone set comprising a housing having in a surface thereof a speaker to be placed adjacent a user's ear when in operation, and an antenna extendable from said housing at an angle relative to said surface such that when extended during operation of the telephone set the antenna is directed upwardly and away from the user's head. According to another aspect of the invention, a portable telephone set comprises: a housing case for containing telephone communication units, the housing case having at least a speaker portion which is in contact with an ear of a user in operation, and being of a configuration having a first side plane on which the speaker portion is provided, and a second side plane opposite to the first side plane; and a rod antenna contained in the housing case and being pulled up to be extendible from a top plane or from the second side plane of the housing case; wherein the rod antenna is inclined in the housing case, such that a top of the rod antenna is positioned on an inside of the second side plane, and a bottom of the rod antenna is positioned on an inside of the first side plane, whereby the top of the rod antenna is more remote from a head side of the user, as the rod antenna is pulled up out of the housing case. BRIEF DESCRIPTION OF THE DRAWINGS The invention will be explained in more detailed in conjunction with the appended drawings, wherein: Fig. 1A and 1B are front views showing conventional portable telephone sets, Fig. 2 is a front view showing a portable telephone set in a first preferred embodiment according to the invention, Fig. 3A and 3B are cross sectional views cut along the lines A-A an B-B in Fig. 2, Fig. 3C is a top plane view of Fig. 2, Fig. 4 is a front view showing a portable telephone set in a second preferred embodiment according to the invention, and Fig. 5 is a front view showing a portable telephone set in a third preferred embodiment according to the invention. DESCRIPTION OF THE PREFERRED EMBODIMENTS Before explaining a portable telephone set in the first preferred embodiment, the aforementioned conventional telephone set will be explained in Figs. 1A and 1B. The conventional portable telephone set comprises a housing case 1a or 1b having the first side plane 6 on which a speaker portion 3 and a microphone portion 5 are provided, and the second side plane 7 along which a rod antenna 2a or 2b is provided to be contained therein and to be extendable through a top plane 4 in accordance with the manual operation of, for instance, pulling an antenna element 8 upward by a user (other side planes of the housing case 1a or 1b are not explained). As apparent from the comparison between the illustrations of Figs. 1A and 1B, the rod antenna 2b tends to be in contact with the head side of the user, as the thickness of the housing case 1b is smaller than that of the housing case 1a in accordance with the improvement of related technologies. The tendency of small size configurations will be more and more enhanced in this field. As a result, the disadvantage, as described before, in which a gain of the rod antenna 2a or 2b is lowered, is observed in the conventional portable telephone set. Next, a portable telephone in the first preferred embodiment will be explained in Fig. 2, wherein like parts are indicated by like reference numerals as used in Fig. 1A and 1B. In the first preferred embodiment, a rod antenna 2 having an element 8 at the top thereof is contained at an angle in a housing case 1, such that the contained rod antenna 2 is positioned on the inside of the first side plane 6 at the bottom thereof, and on the inside of the second side plane 7 at the top thereof. In Fig. 3A, a transmission and receipt unit 10 and a speaker unit 20 are contained in the housing case 1 together with the slanted rod antenna 2, and, in Fig. 3B, the transmission and receipt unit 10 is shown in the housing case 1 together with the rod antenna, while the rod antenna 2 having the element 8 is pulled out so as to be inclined to the top plane 4 of the housing case 1. In operation, the rod antenna 2 having the element 8 extends upward from the top plane 4 of the housing case 1 by a predetermined slant angle, so that the rod antenna 2 is never in contact with the head side of a user, and has a predetermined distance off the head side in the situation where a speaker portion 3 is in contact with the ear of the user, and the microphone portion 5 is in the vicinity of the mouth of the user. Due to the distance between the head side of the user and the rod antenna 2, the gain reduction of the rod antenna 2 is avoided. A portable telephone set in the second preferred embodiment will be explained in Fig. 4, wherein like parts are indicated by like reference numerals as used in Figs. 1A and 1B, Fig. 2, and Figs. 3A to 3C. In the second preferred embodiment, a housing case 1 comprises first and second cases 1A and 1B, wherein the first case 1A contains a rod antenna 2 having two extensible telescopic sections, and the second case 1B is connected to the first case 1A by a connection pivot 9. In the same manner as in the first preferred embodiment, the rod antenna 2 is inclined so as to be more remote at the top thereof from the head of the user than at the bottom thereof. Consequently, the same advantage as in the first preferred embodiment is obtained. In addition, a microphone portion 5 can be immediately in front of the mouth of the user in operation by rotating the second case 1B on the connection pivot 9 by a predetermined angle. In the idle state, on the other hand, the first case 1A and the second case 1B are folded, such that the microphone portion 5 is placed on a speaker portion 3 to make the carrying thereof easier. Fig. 5 shows a portable telephone set in a third preferred embodiment according to the invention, wherein like parts are indicated by like reference numerals as used in Fig. 4. In the third preferred embodiment, the portable telephone set is different from that in the second preferred embodiment only in that a rod antenna 2 is inclined in a first case 1A of a housing case 1 to be extendable through a second side plane 7 thereof. Although the invention has been described with respect to specific embodiment for complete and clear disclosure, the appended claims are not to be thus limited.

Claims: A portable telephone set comprising a housing (1) having in a surface (6) thereof a speaker (3) to be placed adjacent a user's ear when in operation, and an antenna (2) extendable from said housing (1) at an angle relative to said surface (6) such that when extended during operation of the telephone set the antenna (2) is directed upwardly and away from the user's head. A portable telephone set, comprising: a housing (1) for containing telephone communication units, said housing (1) having at least a speaker (3) which in use of the telephone set is adjacent an ear of a user, and being of a configuration having a first side surface (6) on which said speaker is provided, and a second side surface (7) opposite to said first side surface; (6) and a rod antenna (2) contained in said housing (1) and extensible upwardly therefrom; wherein said antenna (2) is disposed at an angle in the housing (1), such that an upper part of said rod antenna within the housing is positioned adjacent said second side plane (7), and a lower part of said rod antenna is positioned within the housing adjacent said first side surface (6), whereby the antenna (2) is inclined away from said user, when extended from said housing (1) during use of the telephone set. A portable telephone set according to Claim 2 wherein the antenna (2) is extendible through a top surface (4) of the housing. A portable telephone set according to Claim 2 wherein the antenna (2) is extendible through the second side surface (7) of the housing (1). A portable telephone set, according to any preceding claim, wherein said antenna (2) is of a multi-step telescopic type. A portable telephone set, according to any preceding claim, wherein said housing is a first housing (1A) and said telephone set further comprises : a second housing (1B) which is provided with a microphone (5), said first housing (1A) and said second housing (1B) being pivotally connected so that said second housing (1B) is rotatable relative to the first housing (1A) so as to be positioned in front of the mouth of said user. A portable telephone set as claimed in Claim 6, wherein the pivotal connection (9) is such that the first and second housings may be folded together. A portable telephone set, according to Claim 7, wherein the speaker (3) and microphone (5) are contained in curved surfaces of matching radii, said first and second housing being foldable together so that said surfaces nest one in the other.

Inventors: TAMURA YOSHIHARA, TAMURA, YOSHIHARA, TAMURA, YOSHIHARA, C/O NEC CORPORATION
Applicants: NIPPON ELECTRIC CO, NEC CORPORATION
Application year: 1993
Main classification: H04B1
IPC codes: H04M1, H04B1, H04Q7, H01Q1