JPH07154120A - Portable telephone set - Google Patents

Abstract

PURPOSE:To use a hand strap fitted to the portable telephone set in common with an antenna. CONSTITUTION:An antenna conductor 18 having a stronger bending strength toward a base end 17a is built in a nearly half circumference of a loop hand strap 17 fitted to a telephone set main body 11. A built-in part 17b of the antenna conductor 18 is stretched in a swollen shape to the outside of a hand by gripping a non-conductor part 17c of the hand strap 17 with the telephone set main body 11.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a portable telephone.

[0002]

2. Description of the Related Art Recently, various wireless communication system devices have been proposed for communication between mobile bodies, and in particular, mobile telephones, personal radios, portable telephones, and the like, such as a mounting type, a shoulder type, or a handy type. Has appeared.

FIG. 4 shows a portable telephone which is generally used at present, and is 90 MHz for a personal radio device or the like.
However, the 800 MHz band is used in car telephones, portable telephones, etc., and antennas having a relatively short length are used.

In FIG. 4, reference numeral 1 denotes an entire portable telephone, which is a cordless type telephone which can be carried with one hand.
The outer casing 2 is formed of a synthetic resin material into a rectangular box shape, and the handset 3 is housed and fixed in the outer casing 2 on the upper end surface side of the front panel 2a of the outer casing 2. Is
An operation key group 4 such as a numeric keypad is arranged at a substantially central position. A microphone (microphone) 5 is housed and fixed in the outer casing 2 on the lower end surface side.

An antenna 6 is provided on the upper surface of the outer casing 2 so as to extend upward. In addition, there is a portable telephone of this type provided with a liquid crystal display section for inputting and displaying on the front panel 2a of the outer casing 2.

[0006]

In the conventional portable telephone 1 configured as above, the handset 3 and the transmitter 5 are provided.
Since the outer casing 2 is housed and fixed in the outer casing 2, the outer casing 2 needs to be formed to have a length substantially equal to the distance between the ear and the mouth of the human body, so that the overall size is increased, and the bag etc. It was inconvenient to store and carry in.

Therefore, when the size of the main body of the telephone is reduced, it is difficult to attach an antenna of a sufficient size to the antenna used in terms of visual balance, and it is difficult to secure the basic performance as a radio device. Further, when the telephone body is small, it is easy to accidentally drop the telephone body, which makes it necessary to add a hand strap.

For these reasons, it is often considered that the loop-shaped hand strap is formed of a flexible mesh conductor band so as to serve as both the hand strap and the antenna. In this way, the hand strap serving also as the antenna is attached. When the telephone is used, as shown in FIG. 5, the telephone body 9 and the antenna / handstrap 10 are often held together by the hand H, which causes a problem that stable radiation as an antenna is difficult to obtain.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a portable telephone in which the hand strap also functions as an antenna to prevent the radiation function from being deteriorated.

[0010]

In order to achieve the above object, a portable telephone according to the present invention comprises a telephone body integrally provided with a transmitter, a receiver, and an operating mechanism, and an antenna conductor on at least a part of a half circumference portion. It is configured by attaching a loop-shaped hand strap which is built in.

In this structure, it is preferable that the hand strap has a bending strength that increases as it is based on the base of the antenna conductor built-in portion.

[0012]

According to the present invention, the hand strap attached to the telephone body has the antenna conductor built therein and also serves as the antenna, and the antenna conductor is built in at least a part of the half circumference portion of the loop-shaped hand strap.
When using the phone body, the non-conductor part of the hand strap is gripped together with the phone body so that the antenna conductor part is located outside the hand and is stretched in a bulging shape due to the elasticity of the conductor itself. In this state, the radiation function of the antenna is prevented from deteriorating when separated from the hand, and good communication can be performed.

Further, the hand strap can be used without any hindrance when carrying the main body of the telephone, and can sufficiently fulfill the fall prevention function.

Further, by giving the hand strap a bending strength that increases as it approaches the base of the antenna conductor built-in portion, the antenna built-in portion is greatly bulged out of the hand, and the radio radiation characteristics are further improved. , You can make a very good call.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In the figure, 11 is a telephone body, and 1
Reference numeral 2 denotes an outer casing, and the front panel 12a is bent and formed in a substantially V shape when viewed from the side.

An operation key group 13 such as a numeric keypad as an operation mechanism is arranged in the lower half of the front panel 12a, and a transmitter (microphone) 14 is housed and fixed in the outer casing 12 on the lower surface side. The receiver 15 is housed and fixed on the upper surface side of the upper half part, and the input information display formed by the liquid crystal display element is provided near the center between the receiver 15 and the operation key group 13. The unit 16 is arranged to configure the telephone body 11.

A hand strap 17 also serving as an antenna is attached to the upper surface of the outer casing 12 of the telephone body 11. That is, the hand strap 17 is formed in a loop shape, and the antenna conductor 18 is built in substantially half around the hand strap 17, and a connector 19 also serving as a terminal of the antenna conductor 18 is attached to the base end portion 17a. Is detachably connected to the antenna coaxial connector 20 provided on the upper surface of the outer casing 12 of the telephone body 11.

The hand strap 17 that also serves as the antenna is provided with a portion of the antenna conductor 1 extending from the base end 17a to the half circumference.
The built-in portion 17b of No. 8 is formed so as to have a bending strength that increases toward the base end portion 17a.

Therefore, in this example, the antenna conductor 18
Is formed so that the base end portion 17a side is thicker and gradually becomes smaller toward the tip end to increase the bending strength on the base end portion 17a side, and the outer shape of the hand strap 17 also follows the shape of the antenna conductor 18. The portion 17b with a built-in antenna conductor has a large diameter on the base end 17a side and a gradually smaller diameter, and is continuous with the non-conductor portion 17c on the other half circumference side in the same diameter.

When carrying the telephone body 11 having the strap 17 also serving as an antenna formed in this way, in the hand, the strap 17 is simply hung on the hand like an ordinary strap and used. When making a call using 11, the non-conductor portion 17c of the other half around which the antenna conductor of the strap 17 is not built is held together with the telephone body 11, and the non-conductor portion 17c is held inside the palm together with the telephone body 11. In addition, since the antenna conductor built-in portion 17b is positioned outside the hand, the function of holding the fall prevention function as a hand strap and the radiation function of the antenna are compatible with each other. That is, as shown in FIG. 3, the antenna-combined strap 17 holds the antenna conductor built-in portion 17b outside the hand H by gripping the non-conductor portion 17c at the other half of the periphery with the telephone body 11. The end portion 17a has a large bending strength, and due to the elasticity of the antenna conductor 18 itself, the end portion 17a is bulged in a bulge shape from the mounting portion with respect to the telephone body 11, so that the radiation function is prevented from deteriorating from the hand. Since it sufficiently functions as an antenna, it is possible to favorably perform a wireless call in the telephone body 11.

In the above structure, the wire diameter of the antenna conductor 18 is gradually changed in order to increase the bending strength on the base end 17a side of the antenna / strap 17, but when the antenna conductor 18 is a plate, the wire diameter is changed. The width will change gradually. Further, the antenna conductor 18 is formed in the same shape from the base end to the tip without changing the wire diameter or the width, and the strap 17
The thickness of itself is set to the base end portion 1 of the antenna conductor built-in portion 17b.
The strap 7a may be formed so as to be larger on the side of 7a and gradually smaller, and the strap 17 also serving as the antenna may be formed by using both the change in the thickness of the strap 17 itself and the change in the wire diameter or the width of the antenna conductor 18.

The antenna conductor 18 is preferably made of a shape memory alloy. Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, a hand strap 1 which also serves as an antenna
7 can be formed by inserting the antenna conductor 18 of synthetic resin, and the strap body is made of fiber thread,
The antenna conductor 1 is formed by knitting with a wire or the like
8 may be inserted and fixed.

The configuration and shape of the telephone body can be changed arbitrarily.

[0026]

As described above, according to the present invention, the hand strap attached to the telephone body has the antenna conductor built therein and also serves as the antenna, and the antenna conductor is built in at least a part of the half circumference portion of the loop hand strap. Therefore, during hand-held telephone conversation of the telephone body, the antenna conductor portion is located outside the hand by grasping the non-conductor portion of the hand strap together with the telephone body.
Due to the elasticity of the conductor itself, it is stretched in a bulging state and separated from the hand, so the radiation function as an antenna is prevented from degrading, stable radiation performance is obtained, and good communication is possible. You can

Further, the hand strap can be used without any trouble when carrying the main body of the telephone and can sufficiently fulfill the function of preventing a fall, and it is very effective when applied to a small portable telephone.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an example of a mobile phone according to the present invention.

FIG. 2 is an enlarged cross-sectional view of the main part of the hand strap of the mobile phone.

FIG. 3 is a perspective view of the mobile phone in use.

FIG. 4 is a perspective view of a conventional mobile phone.

FIG. 5 is a perspective view of a conventional mobile phone with a hand strap in use.

[Explanation of symbols]

 11 Telephone Main Body 12 Outer Shell 13 Operation Key Group 14 Transmitter 15 Handset 17 Hand Strap 17a Base End 17b Antenna Conductor Built-in Part 17c Non Conductor Part 18 Antenna Conductor 19 Connector 20 Antenna Coaxial Connector

Claims (4)

[Claims] 1. A loop-shaped hand strap formed by incorporating an antenna conductor in at least a part of a half circumference is attached to a telephone body integrally provided with a transmitter, a receiver and an operating mechanism. Mobile phone. 2. The mobile phone according to claim 1, wherein the hand strap has a bending strength that increases as it approaches the base of the antenna conductor-containing portion. 3. The mobile phone according to claim 1, wherein the antenna conductor is formed so that the bending strength increases toward the base of the hand strap. 4. The mobile phone according to claim 1, wherein the antenna conductor has a large bending strength in a portion near the base of the hand strap by changing the width or thickness of the conductor.