JPH11331014A - Portable telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the portable telephone set that is small in size and light in weight without deteriorating the shield performance and the performance of a reception exclusive antenna. SOLUTION: Since a reception exclusive antenna 9 is mounted on an outer face of a rear case 6 in a way of feeding to a radio circuit section 2, and a conductor layer 8 is provided to an inner face of the rear case 6, it is not required to provide a hole for preventing characteristic deterioration of the reception exclusive antenna 9 for the rear case 6 and the conductive layer 8 so as to effectively suppress electromagnetic interference between a whip antenna 5 and a radio circuit section 2. Thus, it is not required to provide separately a shield box and the portable telephone set is made small and light.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone having a reception-only antenna, which can be reduced in size and weight without deteriorating the shielding effect and the characteristics of the reception-only antenna. is there.

[0002]

2. Description of the Related Art FIG. 11 is an exploded perspective view showing a conventional portable telephone disclosed in Japanese Patent Application Laid-Open No. 8-148872. In FIG. 11, reference numeral 101 denotes a rear cover having an electromagnetic shielding effect. The first housing 111 and the second housing 111
Is integrally formed with the housing 112 by two-color molding. Reference numeral 102 denotes a front case provided with a circuit component such as a wireless circuit unit (not shown), and 111 denotes a conductive first housing portion, which is formed so that a reception-only antenna (not shown) can be disposed therein. . Reference numeral 112 denotes a non-conductive second housing portion provided so as to cover the first housing portion 111 from the outer surface, and 113 denotes a non-conductive second antenna portion so as not to affect the characteristics of a receiving antenna (not shown). The holes 114 provided are holes provided to prevent a short circuit with a circuit component (not shown). The wireless circuit unit (not shown) is shielded by a shield box (not shown) to prevent electromagnetic interference with a transmitting antenna (not shown).

Next, the operation will be described. The characteristics of the receiving-only antenna (not shown) are secured by the hole 113,
A short circuit with a circuit component (not shown) is prevented by the hole 114. In addition, electromagnetic interference between a transmission antenna (not shown) and the wireless circuit unit is prevented by a shield box (not shown).

[0004]

Since the conventional portable telephone is constructed as described above, the first casing 111
In order to prevent deterioration of the characteristics of a receiving-only antenna (not shown) disposed inside the first housing 111, a hole 113 must be provided in the first housing 111.
When the antenna 13 is provided, electromagnetic interference between a transmitting antenna (not shown) and a wireless circuit unit causes functional deterioration. Therefore, a shield box for shielding the wireless circuit unit is separately required, and the size and weight of the mobile phone can be reduced. There were issues such as difficulty.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a portable telephone which can be reduced in size and weight without deteriorating the shielding performance and the performance of a receiving antenna. .

Another object of the present invention is to provide a portable telephone which can be manufactured efficiently with a small number of steps.

Another object of the present invention is to provide a portable telephone capable of supplying power to a reception-only antenna with a simple structure.

[0008]

According to a portable telephone according to the present invention, a reception-only antenna is provided on an outer surface of a non-conductive housing so as to be able to supply power to circuit components, and a conductive layer is formed on an inner surface of the non-conductive housing. Is provided.

In the portable telephone according to the present invention, the reception-only antenna is formed on the outer surface of the non-conductive casing by conductive treatment.

[0010] In the portable telephone according to the present invention, the reception-only antenna is arranged on the outer surface of the non-conductive casing that is not gripped.

[0011] In the portable telephone according to the present invention, the thickness of the portion of the non-conductive housing where the reception-only antenna is arranged is made larger than the thickness of the portion of the non-conductive housing where the reception-only antenna is not arranged. Is also made thicker to make the housing thicker.

A portable telephone according to the present invention has a hollow portion provided in a thick portion of a housing.

[0013] In the portable telephone according to the present invention, the portion of the non-conductive casing where the reception-only antenna is disposed is formed of a low-loss dielectric to form a low-loss dielectric portion.

[0014] In the portable telephone according to the present invention, the thickness of the conductive layer corresponding to the portion where the reception-only antenna is arranged is determined by:
The thickness of the conductive layer corresponding to the portion where the reception-only antenna is not disposed is formed to be thicker than the thickness of the conductive layer.

A portable telephone according to the present invention is provided with a groove for arranging a reception-only antenna on an outer surface of a non-conductive casing.

In a portable telephone according to the present invention, a non-conductive case is formed of a first case and a second case having a concave portion for holding a substrate, and the first case has a concave portion for holding the substrate. By extending the conductive layer in the concave portion, arranging a ground pattern on a portion of the substrate that comes into contact with the conductive layer, and sandwiching the substrate between the first housing and the second housing. The conductive layer and the ground pattern are electrically connected.

In the portable telephone according to the present invention, a power-supplying hole which has been subjected to conductive processing is provided at a position of the non-conductive housing where the reception-only antenna is arranged, and one opening of the power-supply hole is connected to the reception-only antenna. It is electrically connected, and the other opening of the power supply hole is electrically connected to a circuit component via a power supply member.

The portable telephone according to the present invention is provided with a rust-proof insulating portion on the outer surface of the reception-only antenna.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a cross-sectional view showing a portable telephone according to Embodiment 1 of the present invention, FIG. 2 is an enlarged cross-sectional view showing a feeding mechanism for a reception-only antenna, and FIG. 3 is an enlarged view showing a connection state between a ground pattern and a conductive layer. It is sectional drawing. 1 to 3, reference numeral 1 denotes a wireless circuit unit (circuit component) 2, a control circuit unit (circuit component) 3, and other circuit components mounted thereon.
Printed circuit boards (substrates) 4 on which the ground patterns 1a, 1b, 1c, etc. are formed are connection pieces for connecting the whip antenna 5 to a circuit pattern (not shown) of the printed circuit board 1.

6 is made of, for example, a non-conductive plastic such as ABS resin, and has partition plates 6a and 6b therein.
And a rear case (non-conductive case) having a board holding concave portion 6c for holding an end of the printed circuit board 1 together with a front case 7 described later. A conductive layer 8 to be described later extends in the substrate holding concave portion 6c. Reference numeral 7 denotes a front case (non-conductive casing) formed of a non-conductive plastic such as ABS resin.
A board holding concave portion 7a for holding the end of the printed board 1 together with the rear case 6 is provided. As described above, the printed circuit board 1 is securely fixed by sandwiching the printed circuit board 1 between the rear case 6 and the front case 7, and the conductive layer 8 and the ground patterns 1a, 1b, which will be described later.
1c is formed so as to surely come into contact therewith.

Reference numeral 8 denotes a conductive layer formed on the inner surface of the rear case 6 facing the radio circuit section 2 and the control circuit section 3 by a conductive process such as plating, vapor deposition, thermal spraying, painting, and printing. That is, the conductive layer 8 is formed of the whip antenna 5,
It functions as a shield for suppressing electromagnetic interference generated between the wireless circuit section 2 and the control circuit section 3 and also functions as a ground plane of the whip antenna 5 and a reception-only antenna 9 described later.

Reference numeral 9 denotes a thin plate-shaped receiving-only antenna disposed on the outer surface of the rear case 6 near the radio circuit section 2.

Reference numeral 10 denotes a reception-only antenna 9 of the rear case 6.
Is a power supply hole provided at a position where is disposed (a power supply hole which has been subjected to conductive processing), and a power supply conductor 11 is formed on the peripheral portion and the inner surface of the opening by conductive processing such as plating, vapor deposition, thermal spraying, painting, and printing. Have been. In the power supply hole 10 in which the power supply conductor 11 is formed, one opening is electrically connected to the reception antenna 9, and the other opening is connected to a power supply line (power supply member) 12 from the wireless circuit unit 2. Connected.

Next, the operation will be described. The printed board 1 is securely fixed by the board holding recess 6c of the rear case 6 and the board holding recess 7a of the front case 7,
The conductive layer 8 and the ground patterns 1a, 1b, 1c surely abut. Therefore, it is possible to suppress the deterioration of the shielding effect due to the gap between the contact portions. The reception antenna 9 is connected to the power supply conductor 1 by the wireless circuit unit 2.
1 and the power supply line 12 to easily supply power. The conductive layer 8 functions as a shield for suppressing electromagnetic interference generated between the whip antenna 5, the radio circuit unit 2, and the control circuit unit 3, and also functions as a ground plane of the whip antenna 5 and the reception-only antenna 9. . In particular, since the reception-only antenna 9 is disposed on the outer surface of the rear case 6, the reception-only antenna 9 is provided on the rear case 6 and the conductive layer 8.
It is not necessary to provide a hole for preventing deterioration of the characteristics, and the above-described shielding effect is ensured. Therefore, electromagnetic interference between the whip antenna 5 and the radio circuit unit 2 can be effectively suppressed.

As described above, according to the first embodiment, since the reception-only antenna 9 is disposed on the outer surface of the rear case 6, the rear case 6 and the conductive layer 8 are provided for preventing the characteristic deterioration of the reception-only antenna 9 from being deteriorated. Since there is no need to provide a hole and the shielding effect is ensured, electromagnetic interference between the whip antenna 5 and the radio circuit unit 2 can be effectively suppressed. Therefore, there is no need to separately prepare a shield box for suppressing the electromagnetic interference, and the effect of reducing the size and weight of the mobile phone can be obtained.

The printed board 1 is securely fixed by the board holding recess 6c of the rear case 6 and the board holding recess 7a of the front case 7, and the conductive layer 8 and the ground patterns 1a, 1b, 1c are connected to each other. Since the contact is ensured, the effect of suppressing the deterioration of the shielding effect due to the gap between the contact portions can be obtained.

Further, by forming the power supply conductor 11, an effect that a power supply mechanism to the reception-only antenna 9 can be easily performed is obtained. In particular, if the power supply conductor 11 is formed by the same conductive processing means as that of the conductive layer 8, both can be formed in the same step, and the effect of efficiently manufacturing with a small number of steps can be obtained.

In the first embodiment, the ground pattern 1c and the like are provided on some sides of the printed circuit board 1. However, the present invention is not limited to this. Place the pattern,
Further, by forming these and the conductive layer 8 so as to be connectable, an effect of further suppressing deterioration of the shielding effect is obtained. Although the power supply conductor 11 has been described as being formed by the same conductive processing means as that of the conductive layer 8, other conductors such as a short-circuit conductor can be formed in the same manner. The advantage of good manufacturing is obtained.

Embodiment 2 In the second embodiment, although the illustrated example is omitted, the above-described reception-only antenna 9 is connected to the conductive layer 8.
In the same manner as described above, it is formed by a conductive treatment such as plating, vapor deposition, thermal spraying, painting, and printing. Other configurations and operations are the same as those in the first embodiment, and a description thereof will not be repeated.

As described above, according to the second embodiment, the reception-only antenna 9 is formed in the same conductive processing step as that of the conductive layer 8.
Can be formed, and the effect of simplifying the manufacturing process can be obtained.

Embodiment 3 FIG. 4 is a sectional view showing a portable telephone according to Embodiment 3 of the present invention. In the following description, members that are the same as or correspond to those already described are denoted by the same reference numerals, and description thereof is omitted or simplified. In FIG. 4, in the third embodiment, the reception-only antenna 9 is disposed on the outer surface of the rear case 6 which is not normally gripped. For example, the reception-only antenna 9 is provided on the side of the rear case 6 from which the whip antenna 5 projects. It is arranged so as to slightly cover the bottom surface. Further, in order to secure the shielding effect, the arrangement position of the partition plate 6a is changed so that the position of the conductive layer 8 corresponds to the arrangement position of the reception-only antenna 9.

Next, the operation will be described. Since the reception-only antenna 9 is arranged on the outer surface of the rear case 6 which is not normally grasped, it is possible to prevent the reception-only antenna 9 from being covered by the user of the portable telephone and deteriorating the characteristics.
The other basic operations are the same as those in the first embodiment, and a description thereof will not be repeated.

As described above, according to the third embodiment, the reception-only antenna 9
Can be prevented from being covered with the hands, and the characteristic of the reception-only antenna 9 can be prevented from deteriorating.

In the above-described third embodiment, the reception-only antenna 9 has been described as being disposed at a portion slightly extending from the side of the rear case 6 from which the whip antenna 5 projects to the bottom of the rear case 6. The outer surface of the rear case 6 is not limited to this as long as it is not normally gripped. For example, the outer surface of the rear case 6 may be arranged only on the side surface of the rear case 6 from which the whip antenna 5 projects.

Embodiment 4 FIG. FIG. 5 is a sectional view showing a portable telephone according to Embodiment 4 of the present invention. In FIG. 5, reference numeral 6d denotes a thickness of a portion of the rear case 6 where the reception-only antenna 9 is disposed, and a thickness of another portion. It is a case thick portion formed thicker than the thickness. That is, in the present invention, the rear case 6 of the first embodiment shown in FIG.
Is formed.

Next, the operation will be described. Case thick part 6
By forming d, the distance between the reception-only antenna 9 and the conductive layer 8 serving as the ground plane becomes longer than in the first embodiment, and the characteristics of the reception-only antenna 9 are further improved. The other basic operations are the same as those in the first embodiment, and a description thereof will not be repeated.

As described above, according to the fourth embodiment, since the case thick portion 6d is formed, the distance between the reception-only antenna 9 and the conductive layer 8 as the ground plane is reduced in the first embodiment.
And the effect that the characteristics of the reception-only antenna 9 can be further improved is obtained.

In the fourth embodiment, the case where the thick case 6d is formed in the rear case 6 shown in the first embodiment has been described. However, the present invention is not limited to this. Alternatively, it can be applied to the third embodiment, and the same effect can be obtained.

Embodiment 5 FIG. 6 is a sectional view showing a portable telephone according to a fifth embodiment of the present invention. In FIG. 6, reference numeral 13 denotes a hollow portion formed in a thick portion 6d of a housing of a rear case 6.

Next, the operation will be described. Case thick part 6
By providing the hollow portion 13 in d, the distance between the reception-only antenna 9 and the conductive layer 8 serving as its base plate is increased to improve the characteristics of the reception-only antenna 9, while reducing the weight of the rear case 6, and consequently, the portable type. The phone is lighter. The other basic operations are the same as those in the first embodiment, and a description thereof will not be repeated.

As described above, according to the fifth embodiment, since the hollow portion 13 is provided in the thick portion 6d of the housing of the rear case 6, the characteristics of the reception-only antenna 9 are improved, and the portable telephone is improved. Can be reduced.

In the fifth embodiment, the hollow portion 13 is formed in the case thick portion 6d shown in the fourth embodiment. However, the present invention is not limited to this. Alternatively, the hollow portion 13 may be formed in the third embodiment, and in this case, the same effect is obtained.

Embodiment 6 FIG. FIG. 7 is a sectional view showing a portable telephone according to a sixth embodiment of the present invention. In FIG. 7, reference numeral 14 denotes a case where the thick case portion 6d of the rear case 6 is made of a low-loss dielectric such as Teflon. This is a low-loss dielectric portion formed by the following method.

Next, the operation will be described. Usually, the ABS resin or the like used as the rear case 6 has a large loss and deteriorates the efficiency of the reception antenna 9.
A portion of the rear case 6 where the reception-only antenna 9 is arranged;
That is, by forming the housing thick portion 6d of a low-loss dielectric and forming the low-loss dielectric 14, the reception-only antenna 9 is formed.
Characteristic degradation can be suppressed. The other basic operations are the same as those in the first embodiment, and a description thereof will not be repeated.

As described above, according to the sixth embodiment, since the low-loss dielectric portion 14 is formed, the effect of suppressing the characteristic deterioration of the reception-only antenna 9 can be obtained.

In the sixth embodiment, the low-loss dielectric portion 14 is described as being formed in the thick portion 6d of the housing. However, the present invention is not limited to this. If so, other parts may be used. In this case, the same effect can be obtained. Further, by providing a hollow portion similar to that of the fifth embodiment in the low-loss dielectric portion 14, the weight of the rear case 6 can be reduced.

Embodiment 7 FIG. FIG. 8 is a sectional view showing a portable telephone according to a seventh embodiment of the present invention. In FIG. 8, reference numeral 8a denotes a thickness of the conductive layer 8 corresponding to a portion where the reception-only antenna 9 is arranged. 9 is a thick portion of the conductive layer formed to be thicker than the thickness of the conductive layer 8 corresponding to the portion where the 9 is not disposed. That is, the seventh embodiment
Is formed by forming a conductive layer thick portion 8a on the conductive layer 8 of the sixth embodiment.

Next, the operation will be described. If the conductive layer 8 is formed by electroless plating or the like, and the thickness of the conductive layer 8 corresponding to the portion where the reception-only antenna 9 is arranged cannot be sufficient for the skin depth for the frequency to be used, The loss in the layer 8 is large, and deteriorates the characteristics of the reception-only antenna 9. However, by forming the conductive layer 8 thicker than the other portions and providing the conductive layer thick portion 8a, it is possible to suppress the characteristic deterioration of the reception-only antenna 9. Other basic operations are described in the first embodiment.
Since this is the same as the case described above, the description is omitted.

As described above, according to the seventh embodiment, the thickness of the conductive layer 8a is provided in the conductive layer 8 corresponding to the portion where the reception-only antenna 9 is disposed. The effect that deterioration can be suppressed is obtained.

Although the seventh embodiment has been described on the assumption that the conductive layer 8 is formed with the conductive layer thick portion 8a in the sixth embodiment, the present invention is not limited to this. The same effects can be obtained by applying the same method.

Embodiment 8 FIG. FIG. 9 is a sectional view showing a portable telephone according to an eighth embodiment of the present invention. In FIG. 9, reference numeral 15 denotes a groove formed in the rear case 6 so as to embed and arrange the reception-only antenna 9. That is, in the eighth embodiment, the groove 15 is recessed in the rear case 6 of the seventh embodiment. Note that the basic operation is the same as that of the seventh embodiment, and a description thereof will not be repeated.

As described above, according to the eighth embodiment, the groove 15 is provided in the rear case 6 and the reception-only antenna 9 is buried in the groove 15 so that the surface of the rear case 6 is flattened. The effect that can be obtained is obtained.

In the eighth embodiment, the groove 15 has been described as being recessed in the rear case 6 of the seventh embodiment. However, the present invention is not limited to this, and the same applies to other embodiments. The same effect can be obtained.

Embodiment 9 FIG. FIG. 10 is a sectional view showing a portable telephone according to Embodiment 9 of the present invention.
In the figure, reference numeral 16 denotes a rust-proof insulating portion formed on the outer surface of the reception antenna 9 by painting, printing, or the like. That is, in the ninth embodiment, the rust prevention insulating portion 16 is formed on the reception-only antenna 9 of the first embodiment. The rust prevention means in the rust prevention insulating portion 16 can be realized by plating the reception-only antenna 9 with a metal which is difficult to rust, such as gold, chromium, and nickel, or applying a basic lead chromate rust prevention paint or the like. The insulating means can be realized by applying an insulating paint.

Next, the operation will be described. Since the rust prevention insulating portion 16 is provided on the outer surface of the reception-only antenna 9, rust is prevented from occurring and insulation is secured. Other basic operations are the same as in the first embodiment,
Description is omitted.

As described above, according to the ninth embodiment, the rust-preventive insulating portion 16 is provided on the outer surface of the reception-only antenna 9, so that the rust-prevention and insulation of the reception-only antenna 9 can be obtained. Can be

In the ninth embodiment, the rust-preventing insulating portion 16 is formed on the outer surface of the receiving antenna 9 of the first embodiment. However, the present invention is not limited to this. Can be similarly applied, and the same effect can be obtained.

[0058]

As described above, according to the present invention, the reception-only antenna is provided on the outer surface of the non-conductive housing so as to be able to supply power to the circuit components, and the conductive layer is provided on the inner surface of the non-conductive housing. Since it is configured as described above, it is not necessary to provide a hole for preventing the characteristic deterioration of the reception-only antenna in the non-conductive casing and the conductive layer, and the shielding effect is ensured.
Electromagnetic interference between the transmitting antenna and the radio circuit can be effectively suppressed. Therefore, there is no need to separately prepare a shield box for suppressing the electromagnetic interference, and there is an effect that the portable telephone can be reduced in size and weight.

According to the present invention, since the reception-only antenna is formed on the outer surface of the non-conductive casing by conductive processing, the reception-only antenna can be formed in the same conductive processing step as the conductive layer. There is an effect that the manufacturing process can be simplified.

According to the present invention, the reception-only antenna is arranged on the outer surface of the non-conductive casing that is not grasped, so that the reception-only antenna is prevented from being covered with the hand when the portable telephone is grasped. This has the effect of preventing the characteristics of the reception-only antenna from deteriorating.

According to the present invention, the thickness of the portion of the non-conductive housing where the reception-only antenna is arranged is made thicker than the thickness of the portion of the non-conductive housing where the reception-only antenna is not arranged. Since the antenna is formed as a thick part, the distance between the reception-only antenna and the conductive layer serving as the ground plane is increased, and the characteristics of the reception-only antenna can be further improved.

According to the present invention, since the hollow portion is provided in the thick portion of the housing, there is an effect that the weight of the portable telephone can be reduced while improving the characteristics of the receiving antenna.

According to the present invention, the portion of the non-conductive housing where the reception-only antenna is disposed is formed of a low-loss dielectric and is configured as a low-loss dielectric portion. There is an effect that can be suppressed.

According to the present invention, the thickness of the conductive layer corresponding to the portion where the reception-only antenna is disposed is made larger than the thickness of the conductive layer corresponding to the portion where the reception-only antenna is not disposed, and the thickness of the conductive layer is increased. Since it is configured as a thick portion, there is an effect that the characteristic deterioration of the reception-only antenna can be suppressed.

According to the present invention, since the groove for arranging the reception-only antenna is provided on the outer surface of the non-conductive casing, the surface of the non-conductive casing can be flattened.

According to the present invention, the non-conductive casing is formed from the first casing and the second casing having the recess for holding the board, and the conductive recess is provided in the recess for holding the board of the first casing. The layer is extended, and a ground pattern is provided at a portion of the substrate that comes into contact with the conductive layer, and the substrate is sandwiched between the first housing and the second housing to form the conductive layer. And the ground pattern are electrically connected to each other, so that the substrate is securely fixed, and the conductive layer and the ground pattern are securely in contact with each other. There is an effect that deterioration of the shielding effect can be suppressed.

According to the present invention, a feeding hole that has been subjected to conductive processing is provided at a position of the non-conductive casing where the reception-only antenna is arranged, and one opening of the feeding hole is electrically connected to the reception-only antenna. Since the connection is made and the other opening of the power supply hole is electrically connected to the circuit component via the power supply member, the power supply mechanism to the reception-only antenna can be easily performed. . In particular, if the power supply hole is formed by the same conductive processing means as the conductive layer, both can be formed in the same step, and there is an effect that the manufacturing can be efficiently performed with a small number of steps.

According to the present invention, since the rust prevention insulating portion is provided on the outer surface of the reception only antenna, there is an effect that the rust prevention and insulation of the reception only antenna can be performed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a portable telephone according to Embodiment 1 of the present invention.

FIG. 2 is an enlarged sectional view showing a mechanism for feeding power to a reception-only antenna.

FIG. 3 is an enlarged sectional view showing a connection state between a ground pattern and a conductive layer.

FIG. 4 is a sectional view showing a portable telephone according to a third embodiment of the present invention.

FIG. 5 is a sectional view showing a portable telephone according to a fourth embodiment of the present invention.

FIG. 6 is a sectional view showing a portable telephone according to a fifth embodiment of the present invention.

FIG. 7 is a sectional view showing a mobile phone according to a sixth embodiment of the present invention.

FIG. 8 is a sectional view showing a portable telephone according to a seventh embodiment of the present invention.

FIG. 9 is a sectional view showing a mobile phone according to an eighth embodiment of the present invention.

FIG. 10 is a sectional view showing a mobile phone according to a ninth embodiment of the present invention.

FIG. 11 is an exploded perspective view showing a conventional portable telephone disclosed in Japanese Patent Application Laid-Open No. 8-148872.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Printed circuit board (board), 1a-1c ground pattern, 2 wireless circuit part (circuit parts), 3 control circuit part (circuit parts), 6 rear case (non-conductive case), 6
c, 7a recess for holding substrate, 6d thick part of housing, 7 front case (non-conductive case), 8 conductive layer, 8a thick part of conductive layer, 9 reception-only antenna, 10 power supply hole (conductive processing Power supply hole), 12 power supply line (power supply member), 13
Hollow, 14 Low-loss dielectric, 15 Groove, 16
Rust prevention insulation.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI H05K 9/00 H04B 7/26 V (72) Inventor Toru Fukasawa 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Shuji Urasaki 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Inventor Takatoshi Katsuragi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd.

Claims (11)

[Claims] 1. A portable telephone comprising at least a board on which circuit components are mounted, a reception-only antenna, and a non-conductive casing formed so as to be able to house the board, wherein the non-conductive casing is A portable telephone, wherein the reception-only antenna is provided on an outer surface so as to be able to supply power to the circuit component, and a conductive layer is provided on an inner surface of the non-conductive casing. 2. The reception-only antenna is formed on an outer surface of a non-conductive casing by conductive treatment.
A portable telephone as described. 3. The portable telephone according to claim 1, wherein the reception-only antenna is arranged on an outer surface of the non-conductive casing that is not gripped. 4. The thickness of a portion of the non-conductive housing where the reception-only antenna is arranged is made thicker than the thickness of the portion of the non-conductive housing where the reception-only antenna is not arranged. 4. A thick portion as claimed in claim 1, wherein
The mobile phone according to any one of the preceding claims. 5. The portable telephone according to claim 4, wherein a hollow portion is provided in a thick portion of the housing. 6. A low-loss dielectric portion, wherein a portion of the non-conductive housing where the reception-only antenna is disposed is formed of a low-loss dielectric. A mobile phone according to any one of the preceding claims. 7. The conductive layer corresponding to the portion where the reception-only antenna is disposed is formed thicker than the conductive layer corresponding to the portion where the reception-only antenna is not disposed, thereby forming a conductive layer thick portion. The portable telephone according to any one of claims 1 to 6, wherein: 8. The portable telephone according to claim 1, wherein a groove for arranging a reception-only antenna is provided on an outer surface of the non-conductive casing. 9. A non-conductive casing is formed of a first casing and a second casing having a recess for holding a substrate, and a conductive layer is extended in the recess for holding the substrate of the first casing. A ground pattern is provided in a portion of the substrate that comes into contact with the conductive layer, and the substrate is sandwiched between the first housing and the second housing, thereby forming the conductive layer and the ground pattern. 9. The portable telephone according to claim 1, wherein the portable telephone is electrically connected to the portable telephone. 10. A power-supplying hole in which a peripheral portion of an opening and an inner peripheral surface are conductively provided at a position of a non-conductive housing where a reception-only antenna is arranged, and one opening of the power-supply hole is connected to the reception-only antenna. 10. The power supply device according to claim 1, wherein the power supply hole is electrically connected to a circuit component via a power supply member. A portable telephone as described. 11. The portable telephone according to claim 1, wherein a rust-proof insulating portion is provided on an outer surface of the reception-only antenna.