JP3182635B2 - Antenna structure of mobile radio telephone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable radio telephone equipped with a 1/4 wavelength helical antenna when housed and a telescopic antenna that becomes a 1/2 wavelength whip antenna when extended, and more particularly to an antenna structure thereof. .

[0002]

2. Description of the Related Art Japanese Patent Publication No. Sho 62-28604 is known as a telescopic antenna of this kind.

FIG. 6 is a side view showing an embodiment of a telescopic antenna used in this kind of conventional portable radio telephone.

As shown in FIG. 1, this antenna is configured by inserting an antenna cap 83, an antenna click member 84, and a quarter-wave helical antenna 85 around a rod-shaped half-wave whip antenna 81. . Here, these antenna cap 83, antenna click member 8
The １ ／ wavelength helical antenna 85 is structured so as not to come off from the 波長 wavelength whip antenna 81 by a stopper 82 provided at one end of the 波長 wavelength whip antenna 81.

In order to fix the antenna to the antenna mounting portion provided on the case of the portable radio telephone, a screw 86 provided on the outer periphery of the antenna click member 84 is screwed and fixed to the inner periphery of the antenna mounting portion. Then, the 波長 wavelength helical antenna 85 is inserted on the small diameter portion 87 of the antenna click member 84, and finally, the antenna cap 83 is attached to the outer periphery of the antenna mounting portion.

FIG. 7 shows a case 90 of a portable radio telephone.
FIG. 9 is a schematic diagram of a main part (only the antenna cap 83 is shown in cross section) showing a state in which the antenna is mounted on the antenna mounting portion 91 provided in FIG.

As shown in FIG. 1, a ring-shaped convex portion 93 is provided on the outer periphery of the upper end of the antenna mounting portion 91, while a ring-shaped groove 88 is provided on the inner periphery of the antenna cap 83. The two are integrally fixed by fitting the groove 88 of the antenna cap 83 into the projection 93 of the antenna mounting portion 91.

[0008]

However, the above-mentioned prior art has the following problems. The 波長 wavelength helical antenna 85 hardly fails, but the 波長 wavelength whip antenna 81 causes relatively many failures such as breakage. However, in the above conventional example, the 波長 wavelength whip antennas 81 and 1
Since the 波長 wavelength helical antenna 85 is integrated, if a failure such as breakage occurs in the な ど wavelength whip antenna 81, all the two antennas are replaced even if the し wavelength helical antenna 85 has no abnormality. I had to.

Therefore, not only replacement parts become expensive, but also
Since the attachment / detachment of the 波長 wavelength helical antenna 85 also becomes necessary, the workability when attaching / detaching the antenna is poor.

[0010] Since the fixing between the antenna mounting portion 91 and the antenna cap 83 is performed by fitting the convex portion 93 and the groove 88, a special tool must be used when removing and mounting the antenna. Was not an easy task.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has as its object the purpose of being able to attach and detach a 波長 wavelength whip antenna independently and to easily attach and detach the antenna without using a special tool. An object of the present invention is to provide an antenna structure of a wireless telephone.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, a rod-shaped 1/2 wavelength whip antenna is mounted so as to pass through a through hole provided at the center of a 1/4 wavelength helical antenna. In the antenna structure of the portable radio telephone, the 波長 wavelength helical antenna is fixed to a case of the portable radio telephone, while an outer periphery of the 波長 wavelength whip antenna has an antenna cap attached to the case of the portable radio telephone, The antenna click member provided with a click portion that generates a click feeling by engaging with a click engagement portion provided at a predetermined position of the half-wave whip antenna and is mounted. The stopper provided on the half-wave whip antenna prevents the half-wave whip antenna from slipping off. Locked, and by the geometry of the through hole of the quarter-wave helical antenna that allowed to form the size and shape of the stopper escapes of the 1/2 wavelength whip antenna, a 1/2-wavelength whip antenna 1/4
It is characterized in that it can be separated from the wavelength helical antenna.

Further, according to the present invention, a rod-shaped 波長 -wavelength whip antenna is inserted into a through-hole provided in the center of a 波長 -wavelength helical antenna and penetrated therethrough so as not to come off the outer periphery of the 波長 -wavelength whip antenna. In the antenna structure of a portable radio telephone in which a half-wave whip antenna is attached to the case of a mobile radio telephone by fixing the antenna cap attached to the antenna mounting portion of the case of the mobile radio telephone, a screw is provided on the antenna cap. A screw is also provided on the antenna mounting portion of the case of the portable radio telephone, and the two are integrally fixed by screwing the screw of the antenna cap to the screw of the antenna mounting portion.

[0014]

[Function] Since the half-wave whip antenna and the quarter-wave helical antenna have a structure that can be separated, when the half-wave whip antenna is broken and other faults are replaced, the quarter-wave whip antenna is replaced. The antenna does not need to be replaced. In addition, since the antenna cap is fixed to the antenna mounting portion by screwing, the removal and installation of the half-wave whip antenna can be performed only by rotating the antenna cap without using a special tool.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1A is a diagram showing one embodiment of the present invention.
FIG. 1 is a side view showing a half-wavelength whip antenna 10, and FIG.
FIG. 1B is a side sectional view of the antenna cap 30, and FIG.
3 is a perspective view of the antenna click member 40. FIG.

As shown in FIG. 1A, the half-wavelength whip antenna 10 is rod-shaped, and has a substantially ball-shaped tip 11 at one end. After the antenna cap 30 and the antenna click member 40 are mounted to penetrate the half-wave whip antenna 10, the outer diameter of the half-wave whip antenna 10 is slightly smaller than the outer diameter of the half-wave whip antenna 10. A large stopper 20 is attached.

At two places near both ends of the half-wavelength whip antenna 10, there are provided concave click engaging portions 15, 15 with which a click portion 45 of an antenna click member 40 described below engages and disengages. .

The half-wave whip antenna 10
Is formed by integrally molding a coil spring with an ABS resin or a Duracon resin, and then molding the entire outer periphery with an elastomer resin. Therefore, it has spring properties, is hard to break, and is tough against bending.

Next, the antenna cap 30, which is a part of the exterior component, has a hollow inside, has at one end a through hole 31 through which the half-wavelength whip antenna 10 is inserted, and has the following inner circumferential surface. A female screw 33 for screwing to the antenna mounting portion 63 of the portable wireless telephone 60 is provided.

On the other hand, the antenna click member 40 is substantially cylindrical and has a disc-shaped flange 42 at one end, and a through hole 41 through which the half-wavelength whip antenna 10 is inserted. The other end is provided with four arms 43 extending in the axial direction.
Click engagement part 1 provided on two-wavelength whip antenna 10
A click portion 45 having a protruding shape is provided so as to protrude inward so as to engage with 5, 5.

Here, the diameter of the through hole 31 of the antenna cap 30 and the diameter of the through hole 41 of the antenna click member 40 are both the diameter of the tip 11 of the half-wave whip antenna 10 and the diameter of the stopper 20. , So that they do not escape from the half-wave whip antenna 10.

Next, FIG. 2 shows a 波長 wavelength helical antenna 5.
0 (a) is a side sectional view, and FIG.
Is a side view. As shown in the figure, the 波長 wavelength helical antenna 50 is formed by integrally molding a coil spring 51 in a cylindrical resin 53. From one end, a terminal 55 for electrically connecting to a circuit in the mobile radio telephone 60 described below protrudes. On the outer periphery of the resin 53, two locking projections 57, 57 extending in the axial direction are provided.

The 波長 wavelength helical antenna 50
The central through hole 59 has an inner diameter for accommodating the antenna click member 40 (excluding the collar portion 42) therein.

FIGS. 3 and 4 are perspective views showing a method of attaching the １ ／ wavelength whip antenna 10 and the 波長 wavelength helical antenna 50 to the portable radio telephone 60.

As shown in FIG. 3, various electronic components are incorporated in the lower case 61 of the portable radio telephone 60, and an antenna having a semi-cylindrical shape on the upper end thereof and a male screw 62 provided on the outer periphery thereof. The lower half portion of the mounting portion 63 is provided. On the inner peripheral side of the antenna mounting portion 63, the 1
Locking projections 57, 57 of / 4 wavelength helical antenna 50
Is provided with a semicircular step 65 for locking the step.

On the other hand, various electronic components are also incorporated in the upper case 67, and the upper half thereof is provided with an upper half portion of the antenna mounting portion 63 similar to that provided in the lower case 61.

The concave portion provided in the upper case 67 is a battery pack attaching / detaching portion 69 for accommodating a battery pack accommodating a secondary battery (not shown). , A vertically long storage recess 71 for storing the half-wave whip antenna 10
(FIG. 3 shows a projection 73 on the back surface side). The battery pack (not shown) attached to the battery pack attaching / detaching portion 69 is provided with a groove for escaping the projection 73.

Then, the 波長 wavelength whip antenna 10 and the 波長 wavelength helical antenna 50 are connected to the portable radio telephone 60.
First, as shown in FIG.
The guide pipe 75 is inserted into the one antenna mounting portion 63 up to the position indicated by the dotted line in FIG.

Next, the 波長 wavelength helical antenna 50 is mounted in the antenna mounting portion 63.
The locking projections 57 of the wavelength helical antenna 50 are engaged with the semicircular step 65. At this time, the terminal 55 of the 波長 wavelength helical antenna 50 is connected to the portable radio telephone 60.
It is inserted into the circuit inside and is electrically connected.

Then, the upper case 67 is put on the lower case 61 and both are fixed by screws 77. At this time, 1 /
The four-wavelength helical antenna 50 has its locking projections 57,5.
7 is engaged with the step 65, so that the upper and lower cases 61, 6
It is fixed in 7 and does not fall out. The guide pipe 75 is located in the storage recess 71 provided in the upper case 67.

Next, as shown in FIG.
The 波長 wavelength whip antenna 10 and the click part 45 side of the antenna click member 40 are inserted into the through holes 59 (see FIG. 2) of the 波長 wavelength helical antenna 50 fixed in Female screw 33 (FIG. 1
(Refer to (b)) is screwed into the male screw 62 of the antenna mounting portion 63 and fixed integrally.

As a result, the flange portion 42 of the antenna click member 40 (see FIG. 1C) is sandwiched and fixed by the end face of the antenna mounting portion 63 and the antenna cap 30, whereby the half-wavelength whip antenna 10 also expands and contracts. It is fixed freely.

When the half-wavelength whip antenna 10 is pulled out and pushed in, the click part 45 (see FIG. 1C) of the antenna click member 40 is moved to a half.
Click engagement portion 15 of wavelength whip antenna 10 (FIG. 1)
(See (a))) to generate a click feeling.

When the half-wavelength whip antenna 10 is pushed in and stored in the portable radio telephone 60,
The / 2 wavelength whip antenna 10 is housed in a guide pipe 75 (see FIG. 3). Therefore, even if the half-wavelength whip antenna 10 is bent, the portable wireless telephone 6
It does not come into contact with various electronic components incorporated in the electronic component.

As shown in FIG. 3, the end of the guide pipe 75 on the entrance side is formed as a tapered portion 76 which is expanded in a tapered shape. Can be easily inserted.

A male screw may be provided on the antenna cap 30, and a female screw may be provided on the antenna mounting portion 30, and the two may be screwed together.

5A and 5B show another embodiment of the antenna click structure. FIG. 5A is a cross-sectional view of the click structure at the upper end side of the half-wave whip antenna, and FIG.
FIG. 4 is a cross-sectional view of a click structure on a lower end side of a two-wavelength whip antenna. In this example, a half-wave whip antenna 10 'having a click structure and an antenna click member 4
0 'has almost the same appearance as that described in the above embodiment.

First, as shown in FIG.
The click structure on the upper end side of the wavelength whip antenna 10 'is the tip 11' of the half-wavelength whip antenna 10 '.
Is slightly larger than the diameter at the bottom of
And the second click portion 46 of the antenna click member 40 '.
When the 波長 wavelength whip antenna 10 ′ is pushed in slightly larger than the inner diameter of the, the tip of the tip 11 ′ is pressed into the click portion 46 (30 ′ in the figure).
Is an antenna cap).

Next, as shown in FIG. 5B, the click structure on the lower end side of the half-wave whip antenna 10 'is such that the half-wave whip antenna 10' is provided in the arm 43 'of the antenna click member 40'. A space for accommodating and holding the stopper 20 ′ is formed. When the ホ イ wavelength whip antenna 10 ′ is pulled out from the accommodated state shown in FIG.
The stopper 20 'pushes back the click portion 45' of the arm 43 'and enters the stopper holding space in the arm 20'. When entering in this manner, the above-described second click section 4
6, a stopper 20 'is hooked on the corner, and the half-wave whip antenna 10' is connected to the antenna click member 40 '.
Never get out of

[0040]

As described above in detail, the antenna structure of the portable radio telephone according to the present invention has the following excellent effects. Since it is not necessary to replace even a 故障 wavelength helical antenna when replacing a 波長 wavelength whip antenna in which a failure such as breakage is likely to occur, replacement parts are inexpensive.

Since it is not necessary to attach and detach the 波長 wavelength helical antenna when replacing the 着 脱 wavelength whip antenna, the operability of attachment and detachment is good.

Since the antenna cap is fixed to the antenna mounting portion by screwing, the removal and mounting of the half-wave whip antenna can be performed simply by rotating the antenna cap without using a special tool. Easy to do.

[Brief description of the drawings]

FIG. 1 (a) is a diagram illustrating a half according to an embodiment of the present invention.
FIG. 1B is a side sectional view of the antenna cap 30, and FIG. 1C is a perspective view of the antenna click member 40.

FIGS. 2A and 2B are views showing a quarter-wave helical antenna 50, wherein FIG. 2A is a side sectional view and FIG. 2B is a side view.

FIG. 3 is a perspective view showing a method of attaching the 波長 wavelength helical antenna 50 to the portable wireless telephone 60.

FIG. 4 is a perspective view showing a method of attaching the half-wave whip antenna 10 to the portable wireless telephone 60.

FIG. 5 (a) is a diagram illustrating a 1 / according to another embodiment of the present invention.
Click structure sectional view of the upper side of the two-wavelength whip antenna,
FIG. 5B is a cross-sectional view of a click structure at the lower end side of a half-wave whip antenna according to another embodiment of the present invention.

FIG. 6 is a side view showing a telescopic antenna used for a conventional portable radio telephone.

FIG. 7 is a schematic view of a main part showing a state in which an antenna is mounted on an antenna mounting part 91 provided on a case 90 of the portable radio telephone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 1/2 wavelength whip antenna 15, 15 Click engagement part 20 Stopper 30 Antenna cap 33 Female thread 40 Antenna click member 45 Click part 50 Quarter wavelength helical antenna 59 Through hole 60 Mobile radiotelephone 61 Lower case 62 Male screw 63 Antenna mounting Part 67 Upper case

Claims (2)

(57) [Claims] An antenna structure of a portable radio telephone having a rod-shaped 棒 -wavelength whip antenna mounted so as to penetrate a through-hole provided in the center of the 波長 -wavelength helical antenna. Is fixed to the case of the portable radiotelephone. On the other hand, an antenna cap attached to the case of the portable radiotelephone and a click engagement provided at a predetermined position of the half-wave whip antenna are provided around the half-wave whip antenna. The antenna cap and the antenna click member are provided with a click portion provided with a click portion which engages with the portion to generate a click feeling. Further, the antenna cap and the antenna click member are formed by a stopper provided on the half-wavelength whip antenna. The wavelength whip antenna is prevented from falling off, and the 1/4 wavelength helical antenna is A portable radio, characterized in that the half-wave whip antenna can be separated from the quarter-wave helical antenna by forming the through-hole in such a shape that the stopper of the half-wave whip antenna can be removed. Phone antenna structure. 2. When the antenna cap is provided with a screw,
In both cases, the た wavelength helical antenna is fixed.
Screws are also attached to the antenna attachment part of the
The screw on the antenna cap to the screw on the antenna
2. The antenna structure for a portable radio telephone according to claim 1, wherein both are fixed by being screwed into the antenna.