JPH0918214A - Antenna structure for portable radio telephone set - Google Patents

Abstract

PURPOSE: To provide an antenna structure of a portable ratio telephone set which can easily load and unload a whip antenna in its single body state and also can improve the guide structure of the whip antenna. CONSTITUTION: A 1/4 wavelength helical antenna 50 piercing through a 1/2 wavelength whip antenna 10 is fixed to the case of a portable radio telephone set. An antenna cap 30 and an antenna click member 40 are pierced and mounted on the outer periphery of the antenna 10. The coming-off of the cap 30 and the member 40 can be prevented by a stopper 20. The pierced hole 59 of the antenna 50 has such a dimensional shape that makes the antenna 50 come off the stopper 20. Thus the antenna 10 can be separated from the antenna 50. An antenna guide straw 75 is inserted and held at a step part 58 that is formed in the hole 59 of the antenna 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna structure in which a helical antenna and a telescopic antenna are combined.

[0002]

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

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

As shown in the figure, this antenna is constructed by inserting an antenna cap 83, an antenna click member 84, and a quarter-wave helical antenna 85 on the outer periphery of a rod-shaped half-wave whip antenna 81. Here, these antenna cap 83 and antenna click member 8
The quarter-and-quarter wavelength helical antenna 85 has a structure in which a stopper 82 provided at one end of the half-wavelength whip antenna 81 does not come out of the half-wavelength whip antenna 81.

To fix the antenna to the antenna mounting portion provided on the case of the portable radio telephone, the screw 86 provided on the outer periphery of the antenna click member 84 is screwed to the inner periphery of the antenna mounting portion and fixed. Then, the quarter-wave helical antenna 85 is inserted on the small diameter portion 87 of the antenna click member 84, and finally the antenna cap 83 is assembled to the outer circumference of the antenna mounting portion.

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

As shown in the figure, 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. By fitting the groove 88 of the antenna cap 83 into the convex portion 93 of the antenna mounting portion 91, the both are integrally fixed.

[0008]

However, the above-mentioned prior art has the following problems.

Although the 1/4 wavelength helical antenna 85 hardly breaks down, the 1/2 wavelength whip antenna 81 suffers a relatively large number of failures such as breakage. However, in the above-mentioned conventional technique, since the 1/2 wavelength whip antenna 81 and the 1/4 wavelength helical antenna 85 are integrated, if a failure such as a break occurs in the 1/2 wavelength whip antenna 81, the 1/4 wavelength Even if the helical antenna 85 was normal, both antennas had to be replaced.

Therefore, not only are the replacement parts expensive,
Since it is necessary to attach and detach the quarter-wave helical antenna 85, the workability when attaching and detaching the antenna was poor.

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 has to be used at the time of antenna detaching / attaching work, and no one is required. Was not an easy task.

When the 1/2 wavelength whip antenna 81 to be housed in the case is housed, a guide member for guiding to the housed position or the case itself needs to have a guide structure. A mounting structure or a mounting member is required, and a space is required when the guide structure is formed on the case itself, which is an obstacle to downsizing and cost reduction of the mobile wireless phone.

The object of the present invention was made in view of the above points, and an object thereof is to attach and detach the whip antenna independently, and to attach and detach the antenna easily without using a special tool. To provide an antenna structure for the whip antenna and improve the guide structure for the whip antenna.

[0014]

In order to solve the above problems, the present invention provides an antenna structure for a portable radio telephone in which a rod-shaped whip antenna is attached so as to penetrate a through hole provided in the central portion of a helical antenna. The helical antenna is fixed to the antenna mounting portion of the case of the mobile wireless telephone while holding the antenna guide straw, while the antenna cap attached to the antenna mounting portion of the case of the mobile wireless telephone is provided on the outer periphery of the whip antenna. An antenna click member provided with a click portion that engages with a click engagement portion provided at a predetermined position of the whip antenna to provide a click sensation is attached to the whip antenna, and the antenna cap and the antenna click member are the lower end of the whip antenna. Pull out from the whip antenna with a stopper provided on the Is prevented, and by forming the through hole of the helical antenna into a size and shape that allows the stopper of the whip antenna to come out, and by further forming the inside diameter of the antenna guide straw into a size and shape into which the stopper of the whip antenna can be inserted, By attaching the antenna cap attached to the whip antenna to the antenna attachment part of the case of the mobile wireless phone, the whip antenna penetrates the through hole of the helical antenna and is attached to the antenna attachment part so that it can be stored and pulled out in the antenna guide straw. The whip antenna is separated from the helical antenna by removing the antenna cap from the case.

Further, according to the present invention, in the antenna structure of a portable radio telephone in which a rod-shaped whip antenna is attached so as to penetrate a through hole provided in a central portion of the helical antenna, the helical antenna holds an antenna guide straw. An antenna cap that is fixed to the antenna mounting portion of the case of the mobile wireless phone, and is attached to the outer periphery of the whip antenna on the antenna mounting portion of the case of the mobile wireless phone, and a click engaging portion provided at a predetermined position of the whip antenna. The whipped antenna is attached by penetrating the antenna click member provided with the click portion that engages with the click portion, and the antenna cap attached to the whip antenna is attached to the antenna attaching portion of the case of the mobile radio telephone. The antenna penetrates the through hole of the helical antenna. Antenna guide straw housing and the lead freely attached to the antenna attachment portion, by detaching the antenna cap from the case, characterized in that the whip antenna is separated from the helical antenna.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1A shows an embodiment 1 of the present invention.
1 is a side view showing the 1/2 wavelength whip antenna 10, FIG.
1B is a side sectional view of the antenna cap 30, FIG. 1C.
FIG. 4 is a perspective view of an antenna click member 40.

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

At two locations near both ends of the 1/2 wavelength whip antenna 10, concave click engaging portions 15 and 15 for engaging and disengaging a click portion 45 of an antenna click member 40 described below are provided. .

The half-wave whip antenna 10
Is formed by integrally molding the coil spring with ABS resin or Duracon resin, and then molding the entire outer periphery with elastomer resin. Therefore, it has elasticity, 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 a through hole 31 through which the half-wave whip antenna 10 is inserted at one end thereof, and has the following inner peripheral surface. A female screw 33 for screwing onto the antenna mounting portion 63 of the mobile radio telephone 60 is provided.

On the other hand, the antenna click member 40 is substantially cylindrical and has a disc-shaped collar portion 42 at one end thereof, and a through hole 41 penetrating the 1/2 wavelength whip antenna 10 therein. The other end is provided with four arms 43 extending in the axial direction, and the tip of the arm 43 has the above-mentioned 1 /
Click engaging portion 1 provided on the dual wavelength whip antenna 10
A click portion 45 having a protruding shape is provided so as to be inwardly projected so as to be engaged with the members 5 and 15.

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 portion 11 of the 1/2 wavelength whip antenna 10 and the diameter of the stopper 20. Since they are smaller than the above, they do not get out of the 1/2 wavelength whip antenna 10.

Next, FIG. 2 shows a quarter-wave helical antenna 5.
It is a figure showing 0, the figure (a) is a side sectional view, the figure (b) is a side view, and the figure (c) is a side sectional view in the state where the antenna guide stow was inserted and held. 1/4 as shown in the figure
The wavelength helical antenna 50 is formed by integrally molding a coil spring 51 in a cylindrical resin 53. A terminal 55 for electrically connecting to a circuit in the portable radio telephone 60 described below projects from one end. Further, on the outer periphery of the resin 53, two locking projections 57, 57 extending in the axial direction,
A step 5 for holding the antenna guide straw 75 is provided on the inner circumference.
8 are provided. The antenna guide straw 75
A straw having a thin wall thickness made of resin has a tapered portion 76 in which one end to be the entrance of the 1/2 wavelength whip antenna 10 (the stopper 20 at the lower end thereof) is widened in a tapered manner. As shown in FIG. 4, when the quarter wave helical antenna 50 is inserted from the wide portion of the through hole 59, the taper portion 76 contacts the step 58. Therefore, the antenna guide straw 75 is integrally held by the quarter-wave helical antenna 50.

The quarter-wave helical antenna 50
The central through hole 59 has an inner diameter for accommodating the antenna click member 40 (excluding the collar portion 42) from the wide side thereof.

Next, FIGS. 3 and 4 are perspective views showing a method of attaching the 1/2 wavelength whip antenna 10 and the 1/4 wavelength helical antenna 50 to the portable radio telephone 60.

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

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

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), and a side portion of the battery pack mounting portion 69 is provided. , A vertically long storage recess 71 for storing the half-wave whip antenna 10
(The convex portion 73 on the rear surface side is shown in FIG. 3). A battery pack (not shown) attached to the battery pack attaching / detaching portion 69 is provided with a groove for escaping the convex portion 73.

The 1/2 wavelength whip antenna 10 and the 1/4 wavelength helical antenna 50 are connected to the portable radio telephone 60.
To attach to the lower case 6 as shown in FIG.
The quarter wavelength helical antenna 50 is mounted in the antenna mounting portion 63 of No. 1, but at this time, the locking projections 57, 57 of the quarter wavelength helical antenna 50 are formed in the semicircular step portion 6.
5 is engaged. At this time, the terminal 55 of the quarter-wave helical antenna 50 is inserted into a circuit in the portable radio telephone 60 and electrically connected. Then, the antenna guide straw 75 is inserted into the quarter-wave helical antenna 50 from the opposite side of the taper portion 76, and the step portion 58 is inserted.
(See FIGS. 2A and 2C). With this insertion and holding, the antenna guide straw 75 is positioned at the dotted line portion shown in FIG.

Then, the lower case 61 is covered with the upper case 67, and both are fixed by screws 77. At this time, 1 /
The four-wavelength helical antenna 50 has locking projections 57, 5
Since 7 is engaged with the stepped portion 65, the upper and lower cases 61, 6
It is fixed inside 7 and does not come out. In addition, the antenna guide straw 75 is a storage recess 71 provided in the upper case 67.
Located within.

Next, as shown in FIG. 4, a quarter-wave helical antenna 50 fixed in the antenna mounting portion 63.
The half-wave whip antenna 10 (from the stopper 20 at the lower end) and the click portion 45 side of the antenna click member 40 are inserted into the through-hole 59 (see FIG. 2) of the antenna cap 30, and the female screw 33 (see FIG. b)) is screwed onto the male screw 62 of the antenna mounting portion 63, and is fixed integrally.

As a result, the brim portion 42 (see FIG. 1C) of the antenna click member 40 is clamped and fixed by the end surface of the antenna mounting portion 63 and the antenna cap 30, whereby the 1/2 wavelength whip antenna 10 also expands and contracts. It is fixed freely.

When the half-wave whip antenna 10 is pulled out and pushed in, the click portion 45 (see FIG. 1C) of the antenna click member 40 has the click engaging portion 15 of the half-wave whip antenna 10. (Fig. 1
(See (a)) to generate a click sensation.

When the 1/2 wavelength whip antenna 10 is pushed in and stored in the portable radio telephone 60, the
The 1/2 wavelength whip antenna 10 is housed in the antenna guide straw 75 (see FIG. 3). Therefore, even if the ½ wavelength whip antenna 10 is bent, it will not come into contact with various electronic components built in the portable radio telephone 60.

As shown in FIGS. 2 and 3, the end portion of the antenna guide straw 75 on the inlet side is a tapered portion 76 which is expanded in a tapered shape, so that the 1/2 wavelength whip antenna 10 is bent. However, it can be easily inserted.

The antenna cap 30 may be provided with a male screw, and the antenna mounting portion 30 may be provided with a female screw so that they are screwed together.

FIG. 5 shows another embodiment of the antenna click structure. FIG. 5A is a sectional view of the click structure on the upper end side of the 1/2 wavelength whip antenna, and FIG.
It is a click structure sectional view at the lower end side of a two-wavelength whip antenna. In this example, the half-wave whip antenna 10 ′ having the click structure and the antenna click member 4
0'has substantially 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 portion 11' of the 1/2 wavelength whip antenna 10 '.
The diameter a of the root of is slightly larger than the diameter below this,
And the second click part 4 of the antenna click member 40 '
6 is slightly larger than the inner diameter of 6 and the half-wave whip anten 10 'is pushed in, the root of the tip 11' is pressed into the click portion 46 (3 in the figure).
0'is the antenna cap).

Next, as shown in FIG. 5B, the click structure on the lower end side of the 1/2 wavelength whip antenna 10 'has a 1/2 wavelength whip antenna 10' in the arm 43 'of the antenna click member 40'. Has a space for accommodating and holding the stopper 20 ', and when the half-wave whip antenna 10' is pulled out from the accommodated state shown in FIG. 7A, the stopper 20 'pushes away the click portion 45' of the arm 43 '. Into the stopper holding space in the arm 20 '. Entering in this way, the second click portion 4 described above
The stopper 20 'is caught at the corner of 6, and the 1/2 wavelength whip antenna 10' is the antenna click member 40 '.
Never get out of

Although one embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made based on the matters described in the claims.

[0041]

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 the helical antenna when replacing the whip antenna, which is liable to be broken or broken, replacement parts are inexpensive.

Since it is not necessary to attach and detach the helical antenna when exchanging the whip antenna, the attaching and detaching workability is good.

Since the antenna cap is fixed to the antenna mounting portion by screwing a screw, the whip antenna can be easily removed and installed by rotating the antenna cap without using a special tool.

Since the antenna guide straw is held by the helical antenna, the structure is simple, and no separate mounting parts or mounting structure are required, which facilitates downsizing and cost reduction of the portable radio telephone.

[Brief description of the drawings]

FIG. 1A is a half of 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.

2A and 2B are diagrams showing a quarter-wave helical antenna 50. FIG. 2A is a side sectional view, FIG. 2B is a side view, and FIG. 2C is a state in which an antenna guide straw is held. Side sectional view.

FIG. 3 is a perspective view showing a method of attaching the quarter-wave helical antenna 50 to the mobile radio telephone 60.

FIG. 4 is a perspective view showing a method of attaching the 1/2 wavelength whip antenna 10 to the mobile wireless telephone 60.

FIG. 5 (a) is a drawing showing 1 / of another embodiment of the present invention.
Cross section of the click structure on the top side of the dual wavelength whip antenna,
FIG. 5B is a sectional view of the click structure on the lower end side of the 1/2 wavelength whip antenna according to another embodiment of the present invention.

FIG. 6 is a side view showing a telescopic antenna used in a conventional portable wireless telephone.

FIG. 7 is a schematic view of a main part showing a state in which an antenna is attached to an antenna attachment portion 91 provided in a case 90 of a conventional mobile wireless phone.

[Explanation of symbols]

 10 1/2 Wave Whip Antenna 15, 15 Click Engagement Part 20 Stopper 30 Antenna Cap 33 Female Screw 40 Antenna Click Member 45 Click Part 50 Quarter Wave Helical Antenna 58 Stepped Part 59 Through Hole 60 Mobile Radio Phone 61 Lower Case 62 Male Screw 63 Antenna mounting part 67 Upper case 75 Antenna guide straw

Claims (5)

[Claims] 1. An antenna structure of a portable radio telephone in which a rod-shaped whip antenna is attached so as to penetrate a through hole provided in a central portion of the helical antenna, wherein the helical antenna holds an antenna guide straw and the portable radio telephone. The antenna cap is fixed to the antenna mounting part of the case, while the outer periphery of the whip antenna is engaged with the antenna cap mounted to the antenna mounting part of the case of the mobile radio telephone and the click engaging part provided at the predetermined position of the whip antenna. Then, the antenna click member provided with a click portion that produces a click feeling is attached so as to penetrate, and the antenna cap and the antenna click member are prevented from coming off from the whip antenna by a stopper provided at the lower end portion of the whip antenna. , And the through hole of the helical antenna The antenna cap attached to the whip antenna is attached to the mobile radio telephone by forming the method shape into a shape that allows the stopper of the whip antenna to come out, and by forming the inner diameter shape of the antenna guide straw into a shape that allows the stopper of the whip antenna to be inserted. By attaching to the antenna mounting portion of the case, the whip antenna penetrates through the through hole of the helical antenna and is attached to the antenna mounting portion so that it can be stored and pulled out in the antenna guide straw, and by removing the antenna cap from the case, An antenna structure for a mobile radio telephone, characterized in that the whip antenna is separated from the helical antenna. 2. An antenna structure of a portable wireless telephone having a rod-shaped whip antenna attached so as to penetrate through a through hole provided in a central portion of the helical antenna, wherein the helical antenna holds an antenna guide straw and the portable wireless telephone. The antenna cap is fixed to the antenna mounting part of the case, while the outer periphery of the whip antenna is engaged with the antenna cap mounted to the antenna mounting part of the case of the mobile radio telephone and the click engaging part provided at the predetermined position of the whip antenna. Then, the whip antenna is helically mounted by penetrating and mounting the antenna click member provided with a click part that produces a click feeling, and by mounting the antenna cap mounted on the whip antenna to the antenna mounting part of the case of the mobile wireless phone. Pass through the through hole of the antenna and Storage and drawer freely attached to the antenna attachment portion Dosutoro, by removing the antenna cap from the case, the antenna structure of the mobile radio telephone, characterized in that the whip antenna is separated from the helical antenna. 3. The antenna click member is fixed between the helical antenna and the antenna cap when the antenna cap is attached.
The antenna structure of the described portable radio telephone. 4. The mobile wireless phone according to claim 1, wherein a screw groove is formed in the antenna mounting portion and the antenna cap of the case of the mobile wireless phone, and both are mounted by screwing. Antenna structure. 5. A step portion is formed in a through hole of the helical antenna, a taper portion is formed at one end portion of the antenna guide straw, and the antenna guide straw is inserted into the through hole and held by the step portion. The antenna structure for a mobile radio telephone according to claim 1,