JPS6156524A - Portable radio equipment - Google Patents

Abstract

PURPOSE:To improve the antenna efficiency and also to prevent the deterioration of the radiation efficiency by setting an antenna into a case so that the main body of a radio equipment, a speaker's head and a hand holding a case can be regarded as reflectors of transmission/reception waves and at the same time forming such as external shape of the case so that the antenna stored part is not held easily by hands. CONSTITUTION:An antenna 3 is set at the back side opposite to a telephone receiver mouth 5 of a telephone 2, and a cover part 1a is unified with a case 1 to cover the antenna 3. The part 1a is protruded over other parts of the case 1, and an antenna store part 1A has such an external shape that can not be easily held by hands. While a lower part 1B of the case 1 has no protruded part and therefore can be held easily. In such a constitution, a speaker holds naturally the part 1B by his/her hand. Thus the antenna 3 is covered with the hand. This prevents previously the deterioration of the radiation efficiency. Furthermore the telephone main body 2, the speaker's head part and his/her hand serve as the reflectors of transmission/reception waves to the antenna 3 in case the mouth 5 and a transmitter microphone mouth 6 are put close to an ear and the mouth of the speaker.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to portable radio devices such as transceivers and mobile phones, and particularly relates to an antenna mounting structure. Generally, the main body of the wireless device is housed in a shield case, and the speaker is configured to hold the case with one hand and bring the earpiece and mouthpiece to his ear and mouth, respectively.

The antenna mounting structure of such portable radio equipment can be roughly divided into:
There are two types: an externally protruding type in which a rod-shaped antenna protrudes outside the case, and a built-in type in which a loop, ferrite, plate, or rod-shaped antenna is housed within the case.

[Problem that the invention seeks to solve]

In the case of the above-mentioned former externally protruding structure, there is a risk that one or both of them may be damaged due to contact between the antenna and another object or the human body. On the other hand, in the case of the latter built-in structure, the efficiency of the antenna is inferior to that of an externally protruding structure, and since the radio is held in the hand, the area around the antenna is covered with the hand, reducing fan efficiency. There is a problem that the amount decreases.

[Means for solving problems]

The present invention provides a portable radio device configured to be used by a speaker holding the case in which the main body of the radio device is housed in one hand and bringing the earpiece and mouthpiece close to the ear and mouth, respectively. In order to solve the above problem, the antenna is housed in the case in such a way that the main body of the radio, the speaker's head, and the hand holding the case can be regarded as transmitting and receiving wave reflectors, and the case is The external shape of the antenna is such that there is a step between the antenna accommodating part and the handheld part, so that the antenna accommodating part is difficult to hold by hand.

[Effect]

According to the above configuration, when the speaker uses the radio while holding it in his/her hand, the radio itself and the speaker's head and hands act as transmitting/receiving wave reflectors, so that the antenna movement is improved. Further, a decrease in radiation efficiency due to the antenna being covered by the hand when the antenna housing portion of the case is held by hand is prevented.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a mobile phone which is an embodiment of the present invention.
A) is a side view, (B) is a front view, (C) is a rear view,
is a top view, and 2) is a bottom view. In the figure, reference numeral 1 indicates a telephone case, in which a telephone main body 2 and an inverted F-type antenna 3 are housed. In addition, other codes include 4, g, shi, gotan, etc. for operation - 4 channel, 5 for earpiece, and 6.
indicates a mouthpiece, 7 indicates an ON-OFF switch, and 8 indicates a sensitivity changeover switch.

The antenna 3 is arranged on the back side of the telephone main body 2 opposite to the earpiece 5. The case 1 is integrally formed with a cover portion 1& that encloses the antenna 3. This antenna cover part 11 is intentionally made to protrude from the other parts of the case 1, so that the outer shape of the upper part of the case 1 and the antenna housing part IA is difficult to hold by hand. On the other hand, the lower part IB of the case 1 has no protrusion, and therefore has a shape that is easy to hold by hand.

According to this structure, when using the telephone, the speaker naturally holds the lower part IB of the case 1 in his hand as shown in FIG. 2, and the antenna 3 is covered with his hand, reducing radiation efficiency. You can prevent this from happening.

In addition, when the earpiece 5 and the mouthpiece 6 are brought close to the ear and mouth, the telephone main body 2 and the speaker's head and hands are exposed to the transmitting and receiving wave reflector (particularly the hatched part in FIG. 2) relative to the antenna 3. (as shown in the attached figure), it is possible to obtain good antenna assistance.

In the above embodiment, the antenna housing portion IA of case 1
Although only a portion 1a of the antenna cover is made to protrude in a shape that is difficult to hold by hand, the present invention is not limited to this, and various other shapes may be considered. For example, in the modified embodiment shown in FIG.
The overall cross-sectional shape of the antenna accommodating portion IA is made large enough to be difficult to hold by hand. In short, it suffices if the antenna accommodating part has a shape that allows the speaker to naturally hold the part IB in his or her hand.

Furthermore, as another modification of the embodiment shown in FIG. 1, it is also possible to arrange the antenna 3 upside down as shown in FIG. In this case, the amount of protrusion of the lower part of the antenna cover portion 1a is small, and it is possible that the case is being held in such a way that part of the hand that is holding the case covers the lower part (input/output part) of the antenna 3. Even if the input/output section of the antenna is covered, the radiation efficiency will be relatively less degraded, and there will be no practical problem.

Furthermore, although the above embodiments are examples in which an inverted F-type antenna is used as the antenna, it is also possible to use various other antennas such as a Hui antenna, an F antenna, a loop antenna, a ferrite antenna, a plate-shaped antenna, and a bar-shaped antenna. be.

Furthermore, in the above embodiment, the antenna is placed on the back side of the phone body opposite to the earpiece, and the stones are placed on the left and right sides of the earpiece (the left and right sides in FIG. 1 (b)). It's okay. However, in order to utilize the telephone body and the speaker's head and hands as efficient transmitting and receiving wave reflectors, it is most advantageous to place the telephone on the back side.

〔Effect of the invention〕

As described above, in the portable wireless device according to the present invention, since the antenna is housed in the case, there is not only the risk of damage to the antenna, but also the risk of causing hot water to other objects or the human body due to contact with the antenna. It is very safe.

In addition, even though the antenna is built-in, the antenna efficiency is high and the antenna can be prevented from being covered by the speaker's hand, ensuring high radiation efficiency and enabling highly sensitive wireless communication. be.

[Brief explanation of the drawing]

Figure 4 shows a mobile phone that is an embodiment of the present invention, in which (a) is a side view, (a) is a front view, (c) is a rear view, (a) is a top view, and (a) is a bottom view. , FIG. 2 is a usage state of the telephone shown in FIG. 1. FIG. 3 is a perspective view of a modification of the embodiment shown in FIG. 1, and FIG. 4 is a side view of another modification of the embodiment shown in FIG. It is. 1... Phone case, la... Part of the antenna cover of the case, IA... Antenna housing part of the case, I
B... Handheld part of the case, 2... Phone body, 3
... Inverted F-type antenna, 4... Operation/4 channels, 5...
・Earpiece, 6...Mouthpiece. (D) (E)

Claims (1)

[Claims] 1. In a portable radio device configured so that the speaker holds the case housing the radio device body in one hand and uses the speaker's earpiece and mouthpiece close to the ear and mouth, respectively, the antenna is The main body of the radio, the speaker's head, and the hand holding the case are housed in a case so that it can be regarded as a transmitting/receiving wave reflector, and the outer shape of the case is the same as that of the antenna housing part and the hand holding part. A portable radio device characterized by having a shape in which the antenna accommodating part is difficult to hold by hand because there is a step between the parts.