JP2002217624A - Antenna apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna apparatus that can be manufactured easily and can prevent a second antenna section from being disconnected from a first antenna section. SOLUTION: The second antenna section 4 comprises a second antenna element 4a and a hollow cylindrical body 4b where the second antenna element 4a is mounted while the upper and lower ends are open. A resin joint member 2 comprises a lower section 2a that is connected to a protection covering 1b and an upper section 2b that is formed in one piece with the lower section 2a while being accommodated in the hollow cylindrical body 4b and whose outer diameter is longer than that of the lower section 2a. A connection fixture 3 comprises a connection cylindrical body 3a where the lower section 2a of the resin joint member 2 is inserted, and a locking projection 3b that is formed at the upper outer periphery section of the connection cylindrical body 3a and supports the lower end section of the upper section 2b of the resin joint member 2 and the lower end section of the hollow cylindrical section 4b.

Description

DETAILED DESCRIPTION OF THE INVENTION

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device used for a portable radio device and the like, and more particularly to an antenna device which can be easily manufactured and whose cost can be reduced.

[0002]

2. Description of the Related Art In general, a popular portable telephone is provided with an antenna device for transmitting and receiving radio waves for telephone calls. In general, this antenna device is supported in a box of the main body of the mobile phone so as to be housed and pulled out so as to be easily carried. In this antenna device, when the entire antenna device is stored in the box of the mobile phone main body, transmission and reception become defective. Therefore, by providing a helical antenna portion on the upper portion of the antenna device, the antenna device can be connected to the mobile phone main body. When stored in a box, the helical antenna is used with the helical antenna protruding out of the box of the mobile phone body. As such an antenna device, those shown in FIGS. 5 and 6 are conventionally known. As shown in FIGS. 5 and 6, this antenna device
A first antenna unit 101 supported so as to be retractable and retractable from the radio main unit, and a first antenna unit 10
1, a resin joint member 102 formed at an upper end portion;
A connection fitting 103 attached to the resin joint member 102 and a second antenna section 104 attached to the first antenna section 101 via the resin joint member 102 and the connection fitting 103 are provided. The resin joint member 102 is formed substantially in a rod shape. A male screw is formed on the upper part of the resin joint member 102. On the other hand, the connection fitting 103 is formed of a tubular body having upper and lower ends opened. On the inner periphery of the connection fitting 103,
An internal thread is formed. The resin joint member 102 is inserted into the connection fitting 103 so that the resin joint member 1
By screwing the male screw No. 02 into the female screw of the connection fitting 103, the resin joint member 102 and the connection fitting 103 are connected (coupled).

[0003]

However, in the conventional antenna device, a male screw is formed in the resin joint member 102, a female screw is formed in the connection fitting 103, and the male screw of the resin joint member 102 is used as the female screw of the connection fitting 103. Since it is necessary to screw together, there is a problem that manufacturing is difficult. An object of the present invention is to solve such a problem, and to provide an antenna device that is easy to manufacture and that can prevent the second antenna unit from separating from the first antenna unit. Is to do.

[0004]

According to a first aspect of the present invention, there is provided a radio communication apparatus comprising: a first antenna section supported so as to be housed and withdrawn from a radio main body; A resin joint member connected to the upper end of the antenna unit, a connection fitting attached to the resin joint member, and a second antenna unit attached to the first antenna unit via the resin joint member and the connection fitting Wherein the first antenna section has a first antenna element and a protective coating covering the first antenna element, and wherein the second antenna section has a second antenna element. And a hollow cylindrical body to which the second antenna element is attached and whose upper and lower ends are opened, wherein the resin joint member includes a lower part connected to the protective coating, and a hollow cylindrical body. And an upper portion having an outer diameter larger than the lower portion and formed integrally with the lower portion, wherein the connection fitting includes a connection cylindrical member through which the lower portion of the resin joint member is inserted, A locking projection formed on an upper and outer peripheral portion of a body to support a lower end portion of the upper portion of the resin joint member and a lower end portion of the hollow cylindrical portion; and the second antenna portion further includes the second antenna portion. And an insulating covering member that covers substantially the entire outer surfaces of the antenna element, the hollow cylindrical body, the resin joint member, and the locking projection. According to a second aspect of the present invention, there is provided a first antenna unit supported so as to be housed and pulled out of the wireless device main body, a resin joint member connected to an upper end of the first antenna unit, and a resin joint member. A connection fitting attached to a member, and a second antenna attached to the first antenna via the resin joint member and the connection fitting, wherein the first antenna is a first antenna element And a protective coating covering the first antenna element. The second antenna section has a second antenna element, and the upper and lower ends of which the second antenna element is mounted. A hollow cylindrical body, wherein the resin joint member is connected to the protective coating, and is a rod-shaped body accommodated inside the hollow cylindrical body; and an outer diameter of the rod-shaped body at an upper end portion is larger than that of the rod-shaped body. A top portion which is formed so as to be supported by the hollow cylindrical body, and wherein the connection fitting includes a connecting cylindrical body through which the rod-shaped body of the resin joint member is inserted, and a connecting cylindrical body above the connecting cylindrical body. A locking projection formed on an outer peripheral portion and supporting a lower end of the hollow cylindrical portion; the second antenna portion further includes the second antenna element, the hollow cylindrical body, and the resin joint member; And an insulating covering member covering substantially the entire outer surface of the top portion and the locking projection.

[0005]

Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partially cutaway perspective view showing a part of the antenna device according to the first embodiment of the present invention in a see-through manner. FIG. 2 is a sectional view showing the antenna device of FIG. As shown in FIGS. 1 and 2, this antenna device has a whip antenna unit (first antenna unit).
1, a resin joint member 2 connected to the upper end of the whip antenna unit 1, a connection fitting 3 attached to the resin joint member 2, and the whip antenna unit 1 via the resin joint member 2 and the connection fitting 3. A helical antenna section (second antenna section) 4 to be attached. The whip antenna unit 1 has a whip antenna element (first antenna element) 1a and a protective coating 1b covering the whip antenna element 1a. The whip antenna element 1a is a rod-shaped antenna element formed of a conductor such as an alloy of nickel and titanium. The protective film 1b is formed of a resin such as polybutylene terephthalator (PBT). The whip antenna unit 1 is supported in a wireless device main body (not shown) so as to be housed and pulled out.

The helical antenna unit 4 has a helical antenna element (second antenna element) 4a and a hollow cylindrical body 4b to which the helical antenna element 4a is attached and whose upper and lower ends are open. Helical antenna element 4a
Consists of a coil conductor and is embedded in the side wall of the hollow cylindrical body 4b. The hollow cylindrical body 4b is formed of a resin such as ABS. The helical antenna element 4a has a hollow cylindrical body 4b.
And is formed integrally with the hollow cylindrical body 4b so as to be embedded in the side wall of the hollow cylindrical body 4b. The resin joint member 2 includes a lower portion 2a connected to the protective coating 1b of the whip antenna portion 1,
It has an upper part 2b housed inside the hollow cylindrical body 4b and formed integrally with the lower part 2a and having an outer diameter larger than the lower part 2a. The lower end surface of the upper portion 2b is formed so as to be substantially perpendicular to the side surface of the lower portion 2a. Resin joint member 2
Is formed of a resin such as nylon. The lower portion 2a of the resin joint member 2 is formed with a hole that opens downward. Lower part 2a of resin joint member 2 and protective coating 1
b is connected by press-fitting the protective coating 1b into the hole of the lower portion 2a. The connection fitting 3 has a connection tubular body 3a and a locking projection 3b formed on the upper and outer peripheral portions of the connection tubular body 3a. The connection cylindrical body 3a is open at the upper and lower ends and has the lower portion 2 of the resin joint member 2 inside.
b is inserted. The locking projection 3b is formed on the upper part 2 of the resin joint member 2 through which the lower part 2a passes through the inside of the connection tubular body 3a.
b and the lower end of the hollow cylindrical portion 4b.
A ring-shaped support groove (not shown) is formed on the upper surface of the locking projection 3b. Helical antenna element 4a
Of the helical antenna element 4 is inserted into the annular support groove on the upper surface of the locking projection 3b.
a is supported while being fixed (connected) to the connection fitting 3;
Also, they are electrically connected. The connection fitting 3 is formed of a metal material such as aluminum. Helical antenna part 4
Is a helical antenna element 4a and a hollow cylindrical body 4b.
And an insulating covering member 4c for covering substantially the entire outer surfaces of the resin joint member 2 and the locking projection 3b. The insulating cover member 4c is formed of a resin such as ABS.

Next, a method of manufacturing the antenna device of FIG. 1 will be described with reference to FIG. 3 (a), (b), (c),
(D) and (e) are figures for demonstrating the process of the manufacturing method of the antenna device of FIG. As shown in FIG. 3A, a helical antenna element 4a is provided at the upper end of the connection fitting 3.
Attach. In this case, the lower annular portion of the helical antenna element 4a is inserted into the support groove of the engaging portion 3b of the connection fitting 3 and fixed to the connection fitting. Next, as shown in FIG. 3B, the mold 5 is arranged so as to cover the helical antenna element 4a, and in this state, the inside of the mold 5 is filled with a resin material to form the hollow cylindrical body 4b. It is formed integrally with the helical antenna element 4a. Next, as shown in FIG. 3C, the helical antenna element 4a and the resin joint member 2 integrally formed with the upper part 2b of the resin joint member 2 facing upward form the hollow cylindrical body 4b and the connection fitting 2 together. The upper portion 2b of the resin joint member 2 is supported by the upper end portion of the connection fitting 2 through the inside. Next, as shown in FIG. 3D, the mold 6 is arranged so as to cover almost the entire outer surfaces of the helical antenna element 4a, the hollow cylindrical body 4b, the resin joint member 2, and the locking projection 3b. By filling the inside of the mold 6 with a resin material in this state, the insulating coating member 4c as shown in FIG. 3E is formed.

Next, a second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 4 is a sectional view showing an antenna device according to a second embodiment of the present invention. In the second embodiment of the present invention, the same components as those in the first embodiment of the present invention are denoted by the same reference numerals. The second embodiment of the present invention is the same as the second embodiment of the present invention except for the configuration of the resin joint member 2. As shown in FIG. 4, the antenna device according to the second embodiment of the present invention includes a whip antenna unit (first antenna unit) 1
And a resin joint member 2 formed at the upper end of the whip antenna unit 1, a connection fitting 3 attached to the resin joint member 2, and attached to the whip antenna unit 1 via the resin joint member 2 and the connection fitting 3. Helical antenna section (second antenna section) 4. The resin joint member 2 is connected to the protective coating 1b, and is a rod-like body 2c housed inside the hollow cylindrical body 4b.
And a top 2d formed at the upper end of the rod 2c so as to have an outer diameter larger than the rod 2c and supported by the hollow cylindrical body 4b. The outer periphery of the lower end of the top 2d is
It is supported by the upper end of the hollow cylindrical body 4b. In this case, the locking projection 3b of the connection fitting 3 is
Only the lower end is supported. The resin joint member 2 is formed of a resin such as nylon. A hole that opens downward is formed in the rod-shaped body 2c of the resin joint member 2. Rod 2c of resin joint member 2 and protective coating 1b
Are connected by press-fitting the protective coating 1b into the hole of the rod 2c. The antenna device according to the second embodiment of the present invention is manufactured by the same manufacturing method as the antenna device according to the first embodiment of the present invention.

[0009]

As described above, according to the first aspect of the present invention, the first antenna portion, the resin joint member connected to the upper end of the first antenna portion, and the resin joint member And a second antenna unit attached to the first antenna unit via the resin joint member and the connection unit.
The second antenna section includes a second antenna element, and a hollow cylindrical body to which the second antenna element is attached and whose upper and lower ends are opened. The resin joint member is connected to the protective coating. A lower part, and an upper part housed inside the hollow cylindrical body and integrally formed with the lower part and having an outer diameter larger than the lower part. The connection fitting is inserted through the lower part of the resin joint member. Since the connection tubular body to be provided, and having a locking projection formed on the upper and outer peripheral portions of the connection tubular body and supporting the lower end portion of the upper portion of the resin joint member and the lower end portion of the hollow tubular portion, Easy to manufacture,
In addition, it is possible to prevent the connection fitting from detaching from the resin joint member and prevent the second antenna unit from detaching from the first antenna unit. According to the second aspect of the present invention, the first antenna portion, a resin joint member connected to an upper end portion of the first antenna portion, a connection fitting attached to the resin joint member, A second antenna unit attached to the first antenna unit via the resin joint member and the connection fitting, wherein the first antenna unit includes:
A first antenna element, and a protective coating covering the first antenna element, wherein the second antenna unit includes:
A second antenna element, and a hollow cylindrical body to which the second antenna element is attached and whose upper and lower ends are opened, wherein the resin joint member is connected to the protective coating and is provided inside the hollow cylindrical body. And a top formed at the upper end of the rod to have an outer diameter larger than that of the rod and supported by the hollow cylindrical body. Since it has a connecting tubular body through which the rod-shaped body of the member is inserted, and a locking projection formed on the upper and outer peripheral portions of the connecting tubular body and supporting the lower end of the hollow tubular portion, manufacturing is easy. In addition, it is possible to prevent the connection fitting from detaching from the resin joint member and prevent the second antenna unit from detaching from the first antenna unit.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a perspective view of a part of an antenna device according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing the antenna device of FIG. 1;

3 (a) to 3 (e) are views for explaining steps of a method for manufacturing the antenna device of FIG. 1;

FIG. 4 is a sectional view showing an antenna device according to a second embodiment of the present invention.

FIG. 5 is a sectional view showing a conventional antenna device.

FIG. 6 is an enlarged sectional view showing a main part of a conventional antenna device in an enlarged manner.

[Explanation of symbols]

1 whip antenna section (first antenna section), 1a
Whip antenna element (first antenna element), 1b
Protective coating, 2 resin joint members, 2a lower part, 2b
Top, 2c rod, 2d top, 3 fittings, 3
a Connection cylindrical body, 3b locking projection, 4 helical antenna part (second antenna part), 4a helical antenna element (second antenna element), 4b hollow cylindrical body, 4c
Insulation coating member.

Continuation of front page (72) Inventor Jun Umezawa 300 No. Toyohara, Motohara, Kanagawa-cho, Kodama-gun, Saitama 18 F-term (reference) in Saitama NEC Corporation 5J046 AA10 AB06 FA09 5J047 AA10 AB06 FA02 FD01

Claims (2)

[Claims] 1. A first antenna unit supported so as to be retractable and retractable from a wireless device main body, a resin joint member connected to an upper end of the first antenna unit, and attached to the resin joint member. A connection antenna; and a second antenna unit attached to the first antenna unit via the resin joint member and the connection metal. The first antenna unit includes a first antenna element and a second antenna unit. A second antenna element, and a hollow cylindrical body to which the second antenna element is attached and whose upper and lower ends are opened. The resin joint member has a lower portion connected to the protective coating, and an upper portion housed inside the hollow cylindrical body and integrally formed with the lower portion and having an outer diameter larger than the lower portion. The connection fitting has a connection cylindrical body through which the lower part of the resin joint member is inserted, and a lower end part of the upper part of the resin joint member formed on the upper and outer peripheral portions of the connection cylindrical body. A locking projection for supporting a lower end of the hollow cylindrical portion, wherein the second antenna portion further includes the second antenna element, the hollow cylindrical body, the resin joint member, and the locking projection. An antenna device comprising an insulating coating member that covers substantially the entire outer surface of the antenna device. 2. A first antenna unit supported and housed in the wireless device main body so as to be retractable and retractable, a resin joint member connected to an upper end of the first antenna unit, and attached to the resin joint member. A connection antenna; and a second antenna unit attached to the first antenna unit via the resin joint member and the connection metal. The first antenna unit includes a first antenna element and a second antenna unit. A second antenna element, and a hollow cylindrical body to which the second antenna element is attached and whose upper and lower ends are opened. Having a rod-shaped body connected to the protective coating and housed inside the hollow cylindrical body, and having an outer diameter larger than the rod-shaped body at an upper end portion of the rod-shaped body. A top portion formed and supported by the hollow cylindrical body, wherein the connection fitting includes a connection cylindrical body through which the rod-shaped body of the resin joint member is inserted, and upper and outer peripheral portions of the connection cylindrical body. And a locking projection formed to support a lower end of the hollow cylindrical portion. The second antenna portion further includes a second antenna element, the hollow cylindrical body, and the top portion of the resin joint member. An antenna device comprising: an insulating covering member that covers substantially the entire outer surface of the locking projection.