JPH07321526A - Drawer type antenna device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a drawer type antenna device, improving the sealing property and eliminating the need to discharge water droplets that have entered the storage pipe. [Structure] Antenna holder 19 provided in electronic device body
An electrode element 23 is provided slidably on the antenna holder, and an O-ring 20 fitted to at least the upper end and the lower end of the electrode element is provided on the antenna holder to prevent water droplets and dust from entering the electrode element through the electronic device case. To do.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pull-out type antenna device used in small electronic equipment.

[0002]

2. Description of the Related Art In a small electronic device such as a portable radio telephone shown in FIG. 6, an antenna 1 is usually a retractable type, and the antenna is housed in a device body 2 when carrying and is pulled out when used. Further, in the case where the small electronic device is used outdoors, the pull-out type antenna device has a splash-proof and dust-proof structure so that it does not hinder the rain.

Referring to FIG. 7, a conventional drawer-type antenna device having a splash-proof and dust-proof structure will be described.

A ring seat 4 is provided on the upper surface of the electronic equipment case 3, and a conductive cylindrical antenna holder 5 is mounted on the ring seat 4.
And the upper end of the antenna holder 5 projects upward from the electronic device case 3. A frustoconical antenna cover 6 is fitted on the upper end portion of the antenna holder 5, and the antenna cover 6 is formed of an elastic body such as rubber or synthetic resin.

A wire-shaped electrode element 8 is slidably inserted into the antenna holder 5, and the electrode element 8
The antenna top 9 provided on the antenna cover 6 is
Further, a flange 10 is formed at the lower end to prevent the electrode element 8 from coming off. A loading coil 11 is connected to the antenna holder 5,
The electrode element 8 is connected to a transmitting / receiving circuit section (not shown) via the antenna holder 5 and the loading coil 11.

The upper end of a storage pipe 12 made of an insulating material is fitted to the lower end of the antenna holder 5 to store the electrode element 8 and the lower end of the storage pipe 12 is covered with a plug 7.
Is inserted and the lower end of the storage pipe 12 is sealed.

Thus, the antenna holder 5 and the storage pipe 1
Since the inside and outside of the main body are blocked by 2 and 2, water droplets and dust are prevented from entering from the mounting portion of the electrode element 8.

[0008]

In the above-mentioned drawer type antenna device, the electronic device case 3 and the antenna cover 6 are provided.
It is not possible to prevent water droplets and dust from entering the main body through the gap between them, and it is difficult to discharge the water droplets that have entered the storage pipe 12.

In view of the above situation, the present invention is to improve the sealing property in a drawer type antenna device and prevent water droplets and dust from entering the storage pipe.

[0010]

SUMMARY OF THE INVENTION According to the present invention, an electrode element is slidably provided on an antenna holder provided in an electronic equipment main body, and an O-ring is fitted to the antenna holder at least at the upper end and the lower end of the electrode element. It is characterized by being provided.

[0011]

By providing an O-ring between the electrode element and the antenna holder, it is possible to prevent water droplets and dust from entering through the electronic device case penetrating portion of the electrode element.

[0012]

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

FIG. 1 is a perspective view showing the mobile phone main body 15 with the battery pack removed, and the mountain-shaped raised portion of the case of the mobile phone main body 15 is the antenna housing portion 16. The mobile phone body 15 itself has a splash-proof structure.

A pull-out antenna device according to the present invention will be described with reference to FIGS.

A boss 17 extending upward is formed on the rear side of the upper part of the main body case, and a screw seat 18 is airtightly fitted to the upper end of the boss 17. The screw seat 18 is a short tube and has a screw carved on the inner surface.

An antenna holder 19 is screwed onto the screw seat 18. The antenna holder 19 has a flange portion 19 on top.
The flange portion 19a is provided with a guide tube portion 19b. A screw portion 19c that is screwed into the screw seat 18 is engraved on the base portion of the guide tube portion 19b, and an O-ring 20 for sealing is embedded on the inner surface of the flange portion 19a, and an upper surface of the flange portion 19a is formed. Has a concave curved surface. The upper end of the storage pipe 21 is fitted to the guide tube portion 19b.

An electrode element 23 extending downward from the antenna top 22 is closely covered with an insulating tube 24, and a slide flange 25 is provided at the lower end of the electrode element 23.
Is stuck. As shown in FIG. 5, the slide flange 25 has a flat shape, and the long diameter portion slidably fits into the storage pipe 21, and the short diameter portion has the storage pipe 21.
To form a gap between and.

An upper end covering pipe 26 is fitted to a neck portion of the electrode element 23 following the antenna top 22, and a lower end covering pipe 27 is fitted to a lower end portion of the electrode element 23 following the slide flange 25. There is. The outer diameter of the electrode element 23 is smaller than the inner diameter of the O-ring 20, and the outer diameters of the upper end coating pipe 26 and the lower end coating pipe 27 are slightly larger than the inner diameter of the O ring 20. Further, the lower surface of the antenna top 22 has a convex curved surface that matches the concave curved surface of the antenna holder 19.

The antenna housing 1 of the mobile phone body 15
A recess 28 into which the storage pipe 21 is fitted is formed at the lower end of 6, and a drain hole 29 is formed in the recess 28. Reference numeral 30 in the drawing denotes a coaxial cable that connects the matching circuit of the antenna and the wireless circuit.

As described above, the electrode element 23, the antenna holder 19, the insulating tube 24, and the storage pipe 21.
Etc. are unitized and incorporated in the mobile phone main body 15.

The storage pipe 21 inserted from the screw seat 18 is stored in the antenna storage portion 16 of the mobile phone body 15. The antenna holder 19 is attached to the O-ring 20.
Then, the unit is attached to the mobile phone main body 15 by screwing. In this mounted state, the lower end of the storage pipe 21 is fitted into the recess 28, and the inside of the storage pipe 21 communicates with the outside of the mobile phone body 15 through the drain hole 29. Further, when the antenna holder 19 is screwed onto the screw seat 18, the upper end surface of the screw seat 18 and the antenna holder 19 are
And the bottom surface of the.

The unitized antenna is attached to the inside of the mobile phone body 15 in a splash-proof manner.

Next, when the electrode element 23 is completely housed, the upper end coating pipe 26 is press-fitted into the O-ring 20 and is liquid-tightly sealed by the O-ring 20.
Further, the lower end of the antenna top 22 has the antenna holder 1
Since it matches the concave curved surface of No. 9, the antenna top 22 is stable without any fluctuation.

Further, when the electrode element 23 is completely pulled out, the lower end covering pipe 27 is attached to the O-ring 20.
Since the electrode element 23 is maintained in the pulled-out state, it is liquid-tightly sealed by the O-ring 20.

When the electrode element 23 is pulled out and stored, the O-ring 20 and the electrode element 23 are loosely fitted to each other, and therefore some water droplets or the like may enter. However, the water droplets that have infiltrated the storage pipe 21 are drained. It leaks from the hole 29. As described above, the mobile phone main body 15 itself has a splash-proof structure, and there is no problem even if some water droplets leak into the gap between the mobile phone main body 15 and the battery pack (not shown). Further, it goes without saying that the attachment of the mobile phone main body 15 and the battery pack has a drainage structure in which leaked water drops are further leaked to the outside of the mobile phone main body.

[0026]

As described above, according to the present invention, since the antenna holder is provided with the O-ring, it is possible to prevent water droplets and dust from entering the storage pipe from the penetrating portion of the electronic element case of the electrode element, and to store the antenna. No need to drain water droplets in the pipe.

[Brief description of drawings]

FIG. 1 is a perspective view of a mobile phone body in which a drawer-type antenna device according to the present invention is implemented.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is an enlarged view of a part as viewed from the direction of arrow B in FIG.

FIG. 4 is an enlarged view of a portion viewed from an arrow C in FIG.

5 is a view taken along the line D-D in FIG.

FIG. 6 is a perspective view of a conventional example.

FIG. 7 is a cross-sectional view of the same prior art example.

[Explanation of symbols]

 18 screw seat 19 antenna holder 20 O-ring 21 storage pipe 22 antenna top 23 electrode element 25 slide flange

 ─────────────────────────────────────────────────── (72) Inventor Takeshi Sato 3-14-20 Higashi-Nakano, Nakano-ku, Tokyo Kokusai Electric Co., Ltd. (72) Ryuichi Takahashi 3-14-20 Higashi-Nakano, Nakano-ku, Tokyo Kokusai Electric Within the corporation

Claims (1)

[Claims] 1. A drawer characterized in that an electrode element is slidably provided on an antenna holder provided in a main body of an electronic device, and an O-ring fitted to at least an upper end and a lower end of the electrode element is provided on the antenna holder. Antenna device.