JP2990976B2 - Portable radio with external antenna - Google Patents

Abstract

PURPOSE:To miniaturize a portable radio equipment which has a storable antenna and an external antenna by using the same attachment hole for both antennas. CONSTITUTION:A storable antenna 103 is fixed with pressure by a spring structure 105b of an antenna fixing tool 105. A screw structure 105a is provided above the tool 105. Meanwhile a screw structure 102a is provided below the antenna 102 and fitted to the structure 105a. Thus the antenna 102 is fixed when two screw structures are fastened together. Then both antennas 102 and 103 lead the caught inputs to a matching circuit 104 and a transmission/reception circuit 106 via the tool 105.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable radio having an external antenna, and more particularly to an external antenna having a structure in which a stowable antenna can be housed inside and an external antenna can be detached from the outside. Related to portable radios.

[0002]

BACKGROUND ART portable radio having a conventional retract and type antenna, as shown in FIG. 2, the portable radio device body (housing) 10
1, a retractable antenna 103, and a retractable antenna 103
Antenna fixture 20 for fixing when pulling out and operating
1, the matching circuit 104 of the storage antenna 103, and the storage
And a transmission / reception circuit 106 for transmitting / receiving a wireless electric signal to / from the antenna 103 .

[0003] The retractable antenna 103 is not used for talking.
In the state shown in FIG. 2, as shown in FIGS.
Inside the portable radio unit 101Through guide hole 108
do itPress-fit and stored.During this storage, the storage
The antenna 103 is formed by a known method (not shown), for example, a spring structure.
As in the case of the frame 201a, the bottom is
(The lower end) may be fixed in the main body 101.Also during a call
In this case, the retractable antenna 103 is the same as that shown in FIG.
As shown in (D), the portable device is pulled out of the main body 101.
Used. At that time, the retractable antenna 103Bottom of
Is, Whose outer dimensions are larger than the upper
Established inDue to the spring structure 201a of the antenna fixture 201
And crimped and fixed.A part of the guide hole 108 (book
(Internal direction of body 101) constitutes spring structure 201a.
You.

The antenna fixture 201 has a spring structure 201a for fixing the retractable antenna 103, and the lower end of the antenna is crimped and fixed by a spring when the antenna is pulled out. The signal captured by the antenna is supplied to the matching circuit 104 via the antenna fixture 201 and further input to the transmission / reception circuit 106.

[0005]

As the size of a portable wireless device is reduced, a conventional portable wireless device in which a stowable antenna can be housed inside has a length of the stowable antenna housed therein. In some cases, the length of the antenna is not sufficient to ensure sufficient characteristics as an antenna.

In such a case, there has been a problem that sufficient reception sensitivity and radiated transmission power cannot be obtained, which hinders communication.

Further, in order to solve the above problems, in the portable radio you mount the antenna without a housing antenna externally to the wireless device main body, it can not receive a signal when it is removed the antenna, Conversely, even if the length of the stowable antenna is sufficient to transmit and receive signals, the externally mounted antenna and the radio unit must be carried separately, resulting in poor operability. There was a point.

Further, in a portable radio having a retractable antenna, which can be externally attached to another antenna radio, when the mounting hole of the external antenna is provided at a place different from the guide hole of the retractable antenna, Since two holes are formed in the wireless device main body, a switching circuit for selecting an antenna to be used is required, and in some cases, it is necessary to provide two matching circuits and the like, which hinders miniaturization of the portable wireless device. There was a problem.

An object of the present invention is to solve the above-mentioned problems,
The external antenna and the stowable antenna can be deployed with the same mounting hole, and the matching circuit that guides the capture input to the transceiver can be shared, which captures the performance of the stowable antenna and facilitates miniaturization. To provide a portable wireless device having an external antenna.

[0010]

Means for Solving the Problems] portable radio with external antenna of the present invention, the screw configuration of the antenna fixing portion of the main body
It said body by press-fitting inside the main body forming a guide hole
With a retractable antenna that can be stored in
It is detachable to the body from the outside of the body screwed by
When the retractable antenna is mounted, the retractable antenna is
An external antenna having a hollow structure capable of enclosing the upper part of the tena is provided , and the stowable antenna is provided with the antenna fixed.
Upper part drawn out of the main body with the fixture as a guide
And a spring structure following the screw structure of the antenna fixing part
And a bottom portion having an outer shape that can be fixed to the
When the retractable antenna is pulled out, the retractable antenna is
Has a structure for inserting and fixing the bottom of the .

Further, the portable radio having an external antenna according to the present invention has a structure in which the retractable antenna and the external antenna can be fed from the same feed circuit.

[0012]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a plan view (A) of an embodiment of the present invention and a sectional view (B) showing an enlarged a portion of the plan view (A).

The embodiment of the present invention shown in FIG. 1 is almost the same as FIG.
Shows the state of mounting the external antenna 102 to the mobile radio of the same function. External antenna 102 and the above-mentioned retractable antenna
And antenna 103, a common which is arranged in a portable radio device body 101 into the guide hole 107 is matched respective central axis is mounted, the bottom of the housing-type antenna 103, the main body 101
When pulling out the upper part to the outside , the antenna fixture 105
Is fixed by crimping with a spring structure 105a provided at the lower part of the .

The antenna fixture 105 is the main body 1 of the portable wireless device.
01, and a screw structure 105a is provided on the upper part.

On the other hand, a screw structure 102a that fits with the screw structure 105a of the antenna fixture 105 is provided below the external antenna 102, and the two screw structures 102a and 1
The external Athena 102 is fixed by the fastening of 05a.

The lower part (lower part) of the external antenna 102 is
It has a hollow structure so as to include the stowable antenna 103 when mounted. Therefore, of course, the retractable antenna
The upper outer shape of 103 is located below the external antenna 102.
It is a shape structure to be wrapped.

[0018] During communication using a receiving antenna 103, the bottom of the housing-type antenna 103 antenna fixture 10
It is fixed at 5 in the spring structure 105b until in the guide hole 107
Out can pull from. The antenna fixture 105 is provided with the spring structure 10.
Has 5b, is fixed lump rust bottom portion of the storage-type antenna 103 at the time of the drawer.

The external antenna 102 is connected to the radio main unit 101.
When mounting, the press-fitting the housing antenna 103 inside the radio device body 101, by using a screw structure 102a and 105a and <br/> inserted into the main body 101 as a guide hole 107, screwed and fixed I do.

An input signal captured by the external antenna 102 or the stowable antenna 103 is supplied to a matching circuit 104 via an antenna fixture 105 and then input to a transmission / reception circuit 106.

[0021]

As described above, according to the present invention, the external antenna can be directly attached to the main body of the radio, and the receiving sensitivity and the radiation when the stored antenna is used can be obtained. This has the effect of supplementing the transmission power and ensuring a good communication state.

In addition, the guide hole for attaching the external antenna is shared with the guide hole for accommodating the stowable antenna, so that a separate guide hole is not prepared for each antenna and one matching circuit is provided. And the portable wireless device can be downsized.

[Brief description of the drawings]

FIG. 1 is a plan view (A) of an embodiment of the present invention and a cross-sectional view (B) showing an enlarged a portion of the plan view (A).

FIG. 2 is a plan view (A) of a conventional portable wireless device when a stowable antenna is stowed, a cross-sectional view (B) showing an enlarged b portion of the plan view (A), and a plan view when the stowable antenna is unfolded. It is sectional drawing (D) which expands and shows b part of (C) and top view (C).

[Explanation of symbols]

 Reference Signs List 101 portable radio body 102 external antenna 102a screw structure 103 retractable antenna 104 matching circuit 105 antenna fixing device 105a screw structure 105b spring structure 106 transmitting and receiving circuit 107 guide hole 201 antenna fixing device 201a spring structure

Claims (2)

(57) [Claims] 1. The screw structure of an antenna fixing portion of a main body is
A stowable antenna that can be press-fitted into the body as a through hole and housed in the body, and a lower part screwed into the screw structure
With externally detachable to the body of said body,
When the stowable antenna is mounted,
An external antenna having a hollow structure capable of enclosing a part is provided, and the retractable antenna uses the antenna fixture as a guide.
The upper part drawn out of the main body
The outer part that can be fixed to the spring structure following the screw structure of the
And the bottom of the shape, the spring structure, when the retractable antenna is pulled out,
A portable wireless device having an external antenna, wherein a bottom portion of the retractable antenna is sandwiched and fixed . 2. The portable wireless device having an external antenna according to claim 1, wherein the retractable antenna and the external antenna can be fed from the same feed circuit.