JPH07321522A - Telescopic antenna system - Google Patents

Abstract

PURPOSE:To prevent vibration sound noise from being produced even when the antenna is shaken due to wind or the like in the case of operation of a portable electronic device. CONSTITUTION:An insulation tube 24 is closely covered to an electrode element 23, an upper end of the electrode element 23 is covered with an upper end coating tube on the insulation tube 24, a lower part of the electrode element 23 is covered with a lower end coating tube on the insulation tube 24, an O-ring 20 is provided to an antenna holder provided to an electronic device main body, a proper play is produced between the electrode element 23 and the holder on the way of retracting the electrode element 23 by force-fitting the upper end coating tube and the lower end coating tube into the O-ring 20, the electrode element 23 is elastically supported by the O-ring 20 while the electrode element 23 is completely retracted and housed, and production of vibration of the electrode element 23 is suppressed by the fitting between the O-ring 20 and the lower end coating tube and the close contact of the insulation tube 24 to the electrode element 23.

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.

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 of the antenna holder 5, and the antenna cover 6 is made of an elastic material 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
An insulating tube 13 is fitted in the. A head 9 formed on the electrode element 8 projects from the antenna cover 6, and a flange 10 is formed on 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. By sealing the lower end, the antenna holder 5 and the storage pipe 1
The inside and outside of the main body are blocked by 2 and the water droplets and dust are prevented from entering from the mounting portion of the electrode element 8.

In the drawer type antenna device, in order to prevent breakage of the electrode element 8, the electrode element 8 has a proper rattling with respect to the holding portion,
Consideration is given so that a large bending stress does not occur even when a lateral load is applied to.

[0008]

In the drawer type antenna device, there is rattling between the electrode element 8 and the holding portion, and the insulating tube 13 is simply fitted to the electrode element 8. When the antenna sways when there is wind in the outdoor use, the electrode element 8 vibrates with respect to the holding portion, the insulating tube 13 vibrates with respect to the electrode element 8, and vibration noise of the antenna is generated. It becomes noise in the call.

In view of the above situation, the present invention is intended to improve the communication quality by preventing the antenna from making a vibration sound with respect to the wind.

[0010]

According to the present invention, an insulating tube of an electrode element is closely covered and an upper end covering tube is fitted on the upper end of the electrode element from above the insulating tube.
Also, a lower end covering tube is fitted to the lower part of the electrode element from above the insulating tube, an O-ring is provided in the antenna holder provided in the main body of the electronic device, the electrode element is inserted into the antenna holder, and the upper end is attached to the O-ring. It is characterized in that the covering pipe and the lower end covering pipe are press-fitted.

[0011]

In the process of withdrawing the electrode element, there is a certain amount of rattling between the electrode element and the holding portion, and the O-ring elastically holds the electrode element in the fully withdrawn state and the housed state, and Since the gap allowance of the insulating tube with respect to the electrode element is completely suppressed, the generation of vibration is suppressed when the electrode element is completely pulled out.

[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.

The antenna top 22 is fixed to the upper end portion of the electrode element 23, and the electrode element 23 exists up to approximately the tip of the antenna top 22. A portion of the electrode element 23 extending downward from the antenna top 22 is closely covered with an insulating tube 24,
A slide flange 25 is fixed to the lower end of the. The intimate coating of the insulating tube 24 on the electrode element 23 eliminates rattling between the electrode element 23 and the insulating tube 24 by using a heat-shrinkable tube for the electrode element 23.

The slide flange 25 has a flat shape as shown in FIG.
The long-diameter portion is slidably fitted in the storage pipe 21, and the short-diameter portion forms a gap with the storage pipe 21.

An upper end covering pipe 26 is fitted to a neck portion of the electrode element 23 which is continuous with the antenna top 22, and a lower end covering pipe which is continuously formed with the slide flange 25 is attached to a lower end portion of the electrode element 23. 27 is fitted. The upper end covered pipe 26 and the lower end covered pipe 27
Are both fitted onto the electrode element 23 from above the insulating tube 24 by means of caulking or the like, and by this fitting, the upper and lower ends of the insulating tube 24 are further closely fixed to the electrode element 23.

The outer diameter of the electrode element 23 is smaller than the inner diameter of the O-ring 20, and the upper end coating tube 2
6. The outer diameter of the lower end covering pipe 27 is 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 antenna matching circuit 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.

Thus, 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 tube 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, the O-ring 20 holds the electrode element 23 without rattling, and becomes liquid-tight. Further, since the insulating tube 24 is in close contact with the electrode element 23, the electrode element 23 does not make a vibration sound even if the drawn electrode element 23 is shaken by wind or the like.

Since the electrode element 23 itself is loosely fitted to the O-ring 20, during the withdrawal,
The electrode element 23 has a certain amount of rattling and prevents an excessive bending stress from being generated even when a lateral load is applied to the electrode element 23.

While the O-ring 20 and the electrode element 23 are loosely fitted during the withdrawal and storage of the electrode element 23, some rainwater may enter. However, the rainwater that has entered the storage pipe 21 does not It leaks from the water drain 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 rainwater leaks into the gap between the mobile phone main body 15 and a 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 rainwater is further leaked out of the mobile phone main body.

As described above, since the electrode element 23 reaches almost the upper end of the antenna top 22, even when the electrode element 23 is housed in the mobile phone main body 15,
Calls are possible. Needless to say, the present invention can be applied to portable electronic devices other than mobile phones.

[0031]

As described above, according to the present invention, the generation of vibration noise is suppressed even if the electrode element is shaken by wind or the like, so that a good call can be realized regardless of the environment of use.

[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]

 15 Mobile phone main body 18 Screw seat 19 Antenna holder 20 O-ring 21 Storage pipe 22 Antenna top 23 Electrode element 24 Insulating tube 25 Slide flange 26 Upper end covering pipe 27 Lower end covering pipe 28 Recess

 ─────────────────────────────────────────────────── (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. An insulating tube of an electrode element is tightly covered, an upper end covering pipe is fitted to an upper end portion of the electrode element from above the insulating tube, and a lower end covering pipe is attached to a lower part of the electrode element of the insulating tube. Fitted from above, the antenna holder provided on the electronic device body is provided with an O-ring,
The electrode element is inserted into the antenna holder and the O
A pull-out type antenna device, wherein the upper end cover pipe and the lower end cover pipe are press-fitted into a ring.