JPH08162821A - Antenna structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an antenna structure with uniform click feeling, high strength, and low resistance when pulled out and stored. [Structure] A rod-shaped half-wave whip antenna 10 has a tip portion 11 and a feeding portion 1 each having a large outer diameter at its tip and rear ends.
3 is provided. The half-wave whip antenna 10 is attached by penetrating the cap 30 and the click member 40.
The click engaging portions 17 and 21 are formed by providing the half-wavelength whip antenna 10 with the click convex portions 15 and 19 protruding in a ring shape. The click member 40 has a substantially cylindrical shape and is provided with a slit 46 extending over the entire length in the vertical direction, a flange portion 43 is provided at one end thereof, and the power feeding portion 1 is provided at the other end thereof.
The feeding portion holding portion 45 having an inner diameter slightly smaller than the outer diameter of 3 is provided, and the click engaging portions 17 and 21 project further inward between the collar portion 43 and the feeding portion holding portion 45.
An elastic contact claw 47 that elastically contacts with is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna structure having a whip antenna (bar-shaped antenna) which is attached to a wireless device in a telescopic manner.

[0002]

2. Description of the Related Art Conventionally, as an antenna that is attached to a portable radio telephone in a telescopic manner to transmit and receive radio signals,
There is a wavelength whip antenna.

FIGS. 5A and 5B are schematic views showing a conventional 1/2 wavelength whip antenna of this type, respectively.

The half-wave whip antenna 80 shown in FIG. 1 (a) is of the type disclosed in, for example, Japanese Utility Model Laid-Open No. 3-48903 and Japanese Patent Laid-Open No. 6-252822.

That is, this 1/2 wavelength whip antenna 8
Reference numeral 0 designates a rod-like shape, and a knob-shaped tip portion 81 is provided at the tip thereof, and a large diameter portion 83 whose outer diameter is increased by a predetermined length is provided continuously to the tip portion 81, while the 1/2 wavelength whip antenna 8 is provided.
A feeding portion 85 having a thick outer diameter for a predetermined length is provided at the rear end of 0. On the other hand, a click member 87 having a substantially cylindrical shape is attached to the 1/2 wavelength whip antenna 80. A plurality of vertical slits 89 are formed on the rear end side of the click member 87.

When the half-wave whip antenna 80 is housed, the large-diameter portion 83 of the half-wave whip antenna 80 is press-fitted onto the inner peripheral surface of the click member 87 as shown in FIG. 1/2 wavelength whip antenna 8
When 0 is pulled out, the feeding portion 85 of the half-wave whip antenna 80 is press-fitted to the inner peripheral surface of the click member 87, and a click feeling is generated at the time of press-fitting.

Next, the half-wave whip antenna 90 shown in FIG. 1B is of the type disclosed in, for example, Japanese Patent Laid-Open No. 2-271701.

That is, this 1/2 wavelength whip antenna 9
0 is a ring-shaped recess 9 near the front end
1, 93 are provided, while the click member 9 is provided.
5 is provided with an elastic contact claw 97 protruding inward.

When the 1/2 wavelength whip antenna 90 is to be housed, as shown in FIG.
Of the half-wave whip antenna 90 is engaged with the ring-shaped recess 91 of the half-wave whip antenna 90, and when the half-wave whip antenna 90 is pulled out, the elastic claw 97 of the half-wave whip antenna 90 is The ring-shaped recesses 93 are engaged with each other, and a click feeling is generated at the time of engagement.

[0010]

However, the above-mentioned FIG.
In the conventional example shown in (a), when the click member 87 is press-fitted into the large-diameter portion 83 of the half-wave whip antenna 80 due to the variation in the outer diameter a (or the outer diameter b of the feeding portion 85). However, there was a problem that the power of the scatter varied, and the click feeling greatly varied.

Further, since the claw portion 89 of the click member 87 directly contacts the end stopper 101, the 1/2 wavelength whip antenna 80 may easily come off depending on the size of the outer diameter c (conversely speaking). The diameter of the end stopper 101 cannot be reduced).

On the other hand, in the conventional example shown in FIG. 5 (b), since the diameter of the ring-shaped recess 91 provided in the half-wave whip antenna 90 is small, there is a problem that the strength is weak and it is easily broken. .

Further, when the 1/2 wavelength whip antenna 90 is pulled out or stored, the elastic contact claw 97 grips and slides on the outer peripheral surface of the 1/2 wavelength whip antenna 90 with a predetermined elastic force over the entire length thereof, which causes resistance. There was also a problem that the operation became heavy. Further, since the half-wave whip antenna 90 can be held in a stopped state in the middle (a state where it is not completely extended or housed), it may not function as an antenna in some cases.

Further, since the base 99a of the tip end 99 of the 1/2 wavelength whip antenna 90 directly collides with the elastic contact claw 97, the elastic force of the elastic contact claw 97 must be increased by that amount, which results in the elasticity. There was also a problem in that it was not possible to obtain a light click feeling.

The present invention has been made in view of the above points, and an object thereof is to provide a uniform click feeling, high strength,
It is to provide an antenna structure with little resistance when pulled out and stored.

[0016]

In order to solve the above-mentioned problems, the present invention comprises a rod-shaped whip antenna which is attached to a radio so as to be extendable and contractable, and the whip antenna has its outer diameter at its front end and rear end, respectively. An antenna structure in which a click member that is provided with a larger tip portion and a power feeding portion and that engages with a click engaging portion provided at a predetermined position of the whip antenna penetrates and is attached The click engaging part is formed between the click convex part and the tip part by providing a click convex part projecting in a ring shape at a position on the rear end side of a predetermined dimension from at least the tip part of the whip antenna, On the other hand, the click member has a substantially cylindrical shape and is provided with a slit over the entire length in the vertical direction, and a collar portion fixed to the radio is provided at one end thereof. , The other end is provided with a feeding portion holding portion having an inner diameter slightly smaller than the outer diameter of the feeding portion of the whip antenna, and further, between the brim portion and the feeding portion holding portion, the whip is projected inward. An elastic contact claw that elastically contacts the click engaging portion of the antenna is provided.

[0017]

When the whip antenna is pushed in and stored in the wireless device, the elastic contact claw of the click member rides over the click convex portion provided on the whip antenna and is locked in the click engaging portion.

[0018]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1A shows a first embodiment 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.
1 is a perspective view of the click member 40, FIG. 1D is a perspective view of the click member 40 seen from the opposite side, and FIG. 1E is FIG. 1D.
FIG.

As shown in FIG. 1 (a), the half-wave whip antenna 10 is rod-shaped and is provided with a substantially ball-shaped tip portion 11 having a large outer diameter at its tip. At the end, a power supply unit 1 of a predetermined length with a large outer diameter
3 is provided. A stopper portion 23 having a diameter larger than that of the power feeding portion 13 is provided at an end portion of the power feeding portion 13.

Next, a click convex portion 15 protruding in a ring shape is provided at a position rearward from the front end portion 11 of the half-wavelength whip antenna 10 by a predetermined dimension, so that the click convex portion 15 and the front end portion are provided. Click engagement part 17 between 11
Is formed, and by providing a click convex portion 19 projecting in a ring shape at a position on the tip side of a predetermined dimension from the power feeding portion 13 of the 1/2 wavelength whip antenna 10, the click convex portion 19 and the power feeding portion are formed. Click engagement part 2 between 13
1 is formed.

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

Then, this 1/2 wavelength whip antenna 1
At 0, the antenna cap 30 and the click member 40 are attached so as to penetrate therethrough.

Here, the antenna cap 30 has a hollow inside, has a through hole 31 through which the 1/2 wavelength whip antenna 10 is inserted at one end thereof, and an antenna of a portable radio telephone 60 described below on the inner peripheral surface thereof. A female screw 33 for screwing onto the mounting portion 63 is provided. The inner diameter of the through hole 31 is equal to the half wavelength whip antenna 1 described above.
It is configured to be slightly larger than the outer diameter of the stopper portion 23 of 0.

Next, the click member 40 is formed into a substantially cylindrical shape so that a through hole 41 penetrating the half-wave whip antenna 10 is provided therein, and one end (antenna tip side) of the click member 40 has a radio housing. A substantially disk-shaped brim portion 43 is provided for attaching and fixing to the body, and the other end has an inner diameter slightly smaller than the outer diameter of the feeding portion 13 of the 1/2 wavelength whip antenna 10 over a predetermined length in the vertical direction. Power supply unit holding unit 4
5 is formed.

Further, between the collar portion 43 of the click member 40 and the feeding portion holding portion 45, two elastic contact claws 47,
47 are provided. The elastic contact claw 47 includes an arm portion 49 formed by cutting out the outer peripheral surface of the click member 40 in a substantially U shape, and a claw 51 protruding inward from the tip of the arm portion 49. Has been done. The elastic contact claw 47 is slightly thinner than the other parts of the click member 40, and is integrally molded so as to be more elastic.
Further, the elastic contact claw 47 is protected by the collar portion 43.

Further, the click member 40 has one slit 46 extending along the entire length in the vertical direction and one slit 46.
A slit 48, which is on the opposite side of 80 ° and extends in the vertical direction from the brim portion 43 by a predetermined distance, is provided.

Here, the distance L2 between the two claws 51 is 1/2
The wavelength whip antenna 10 is configured to have substantially the same outer diameter L1 as that of a portion of the wavelength whip antenna 10 where the click convex portion 15 and the like are not provided.

To attach the antenna cap 30 and the click member 40 to the 1/2 wavelength whip antenna 10, the stopper portion 2 of the 1/2 wavelength whip antenna 10 is attached.
The antenna cap 30 and the click member 40 may be inserted from the 3 side. At this time, since the slit 46 extending over the entire length is formed in the click member 40, the through hole 41
Is easy to spread and can pass through the stopper portion 23 of the 1/2 wavelength whip antenna 10. On the opposite side of the slit 46 over the entire length, the slit 4 is cut in half from the collar portion 43.
By including 8, the through hole 41 is more easily expanded, and the 1/2 wavelength whip antenna 10 is more easily inserted. Note that once the antenna cap 30 and the click member 40 are inserted, the through hole 41 of the click member 40 returns to its original diameter, so it cannot be easily pulled out.

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. As shown in the figure, the quarter-wave helical antenna 50 is configured by integrally molding a coil spring 51 in a cylindrical resin 53, a terminal 55 protruding from one end, and a 2 on the outer periphery of the resin 53. Book projection 5
7,57 are provided. The through hole 59 of the quarter-wave helical antenna 50 has an inner diameter for accommodating the click member 40 (excluding the collar portion 43).

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, at the upper end of the lower case 61 of the portable radiotelephone 60, there is provided a lower half portion of an antenna mounting portion 63 having a semi-cylindrical shape and an external thread 62 provided on the outer periphery thereof. ing. The locking projection 5 of the quarter-wave helical antenna 50 is provided on the inner peripheral side of the antenna mounting portion 63.
A semicircular stepped portion 65 that locks 7, 57 is provided.

On the other hand, the upper half of the upper case 67 is also provided with an upper half portion of the antenna mounting portion 63 similar to that provided in the lower case 61. Further, a battery pack attaching / detaching portion 69 is provided in the upper case 67, and a vertically long accommodating concave portion 71 for accommodating the 1/2 wavelength whip antenna 10 (see FIG. Three
Is provided with a projection 73 on the back side thereof.

In order to mount the 1/2 wavelength whip antenna 10 and the 1/4 wavelength helical antenna 50, first, as shown in FIG. 3, the antenna mounting portion 6 of the lower case 61 is mounted.
A guide pipe 75 is inserted into the position 3 to the position shown by the dotted line in the figure.

Next, the quarter-wave helical antenna 50 is mounted in the antenna mounting portion 63. At this time, the locking projections 57, 57 of the quarter-wave helical antenna 50 are engaged with the step portion 65. At this time, the terminal 55 of the quarter-wave helical antenna 50 is plugged into the circuit inside the portable radio telephone 60.

Then, the lower case 61 is covered with the upper case 67, and both are fixed by screws 77.

Next, as shown in FIG. 4, the antenna mounting portion 6
The half-wave whip antenna 10 and the click member 40 are inserted into the through-hole 59 (see FIG. 2) of the quarter-wave helical antenna 50 fixed in the antenna 3, and the female screw 33 (see FIG. ) Refer to the antenna mounting portion 63
The male screw 62 is screwed and fixed integrally.

As a result, the collar portion 4 of the click member 40 is
3 (see FIG. 1C) is sandwiched between the end surface of the antenna mounting portion 63 and the antenna cap 30.
The 1/2 wavelength whip antenna 10 is fixed so that it can expand and contract.

When the half-wave whip antenna 10 is pushed and stored, as shown in FIG. 1, the elastic contact claws 47 of the click member 40 have their claws 51, 51 half.
Clicking convex portion 15 provided on the wavelength whip antenna 10
And is engaged with the click engaging portion 17. At this time, a click feeling occurs. Since the tip portion 11 contacts the antenna cap 30 at this position, the 1/2 wavelength whip antenna 10 cannot be pushed any further. At this time, in the mobile radio telephone 60, only the quarter-wave helical antenna 50 functions as an antenna.

On the other hand, when the 1/2 wavelength whip antenna 10 is pulled out, the elastic contact claws 47, 47 of the click member 40 are
Claws 51, 51 of the click engaging portion 2 over the click convex portion 19 provided on the 1/2 wavelength whip antenna 10.
Locked at 1. A click sensation also occurs at this time. Since the stopper portion 23 contacts the end surface of the click member 40 at this position, the 1/2 wavelength whip antenna 10 cannot be pulled out any further. In this state, the 1/2 wavelength whip antenna 10 functions as an antenna when the feeding portion 13 is electromagnetically coupled to the 1/4 wavelength helical antenna 50.

At this time, since the feeding portion holding portion 45 of the click member 40 having a diameter slightly smaller than that of the feeding portion 13 is engaged with the feeding portion 13 of the 1/2 wavelength whip antenna 10, the 1/2 wavelength whip is obtained. The antenna 10 can be securely fixed to this position without play.

At this time, since the click member 40 is provided with the slit 46 extending over the entire length, it is possible to substantially uniformly hold the power feeding portion 13 in the entire power feeding portion holding portion 45 without being influenced by the variation in the diameter of the power feeding portion 13.

Although one embodiment of the present invention has been described above, the present invention is not limited to this. In the above-described embodiment, an example in which the 1/2 wavelength whip antenna and the 1/4 wavelength helical antenna are used as a telescopic antenna for electromagnetically coupling has been described, but the present invention is not limited to this and can be used for all telescopic antennas. .

[0043]

As described in detail above, the antenna structure according to the present invention has the following excellent effects. Since the click engaging portion is formed by providing the click convex portion, it is not necessary to provide a groove unlike the conventional case,
Therefore, the antenna strength can be kept strong.

Since the click convex portion is provided, the elastic contact claw provided on the click member falls into the click engaging portion after riding on the click convex portion, which is a conventional example in which the click pawl is simply climbed or falls. Compared with that, the click feeling is improved.

Since the slits are provided in the click member over the entire length in the vertical direction, not only is it easy to attach the click member to the whip antenna, but also the feed portion holding portion of the click member engages with the feed portion of the whip antenna. The holding strength becomes uniform.

Since the click convex portion is provided, it is not necessary for the elastic contact claw of the click member to strongly grip the portion of the whip antenna where the click convex portion is not provided. Therefore, when the whip antenna is pulled out and stored, the gripping sliding resistance by the elastic contact claw can be reduced or eliminated.

Since the elastic contact claw of the click member is provided between the brim portion and the power feeding portion holding portion, the tip portion of the whip antenna and the like can be protected without directly colliding with it.
As a result, the elastic contact claw can be made thin, and a light click feeling with rich elasticity can be obtained.

[Brief description of drawings]

FIG. 1 (a) is a half according to one embodiment of the present invention.
1B is a side sectional view of the antenna cap 30, FIG. 1C is a perspective view of the click member 40, and FIG. 1D is a view of the click member 40 from the opposite side. 1 (e) is a perspective view of FIG.
It is sectional drawing.

2A and 2B are diagrams showing a quarter-wave helical antenna 50. 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 quarter-wave helical antenna 50 to the mobile radio telephone 60.

FIG. 4 is a perspective view showing a method of attaching the ½ wavelength whip antenna 10 to the mobile radio telephone 60.

5 (a) and 5 (b) are schematic views showing a conventional 1/2 wavelength whip antenna, respectively.

[Explanation of symbols]

 10 1/2 wavelength whip antenna 11 Tip part 13 Feed part 15, 19 Click convex part 17, 21 Click engaging part 30 Antenna cap 40 Click member 43 Collar part 45 Feed part holding part 46, 48 Slit 47, 47 Elastic contact Nail 60 mobile wireless phone

Claims (2)

[Claims] 1. A rod-shaped whip antenna that is attached to a wireless device so as to be extendable and contractible, and a front end portion and a power feeding portion having large outer diameters are provided at a front end and a rear end of the whip antenna, respectively, and In an antenna structure in which a click member that engages with a click engaging portion provided at a predetermined position to generate a click sensation is penetrated and attached, the click engaging portion of the whip antenna is at least from a tip end portion of the whip antenna. It is formed between the click protrusion and the tip by providing a ring-shaped protrusion for the click at a position on the rear end side of a predetermined size, while the click member is substantially cylindrical and has a vertical length. There is a slit that extends over the outside of the feed part of the whip antenna at the other end. A feeding part holding part having a slightly smaller inner diameter is provided, and an elastic contact claw is provided between the brim part and the feeding part holding part so as to project inward and elastically contact the click engaging part of the whip antenna. An antenna structure characterized in that. 2. The click protrusion of the whip antenna is provided between the feed portion of the whip antenna and the feed portion of the whip antenna at a position on the tip side of the predetermined dimension by protruding in a ring shape. The antenna structure according to claim 1, wherein a joint portion is formed.