JPS5830208A - Antenna of portable receiver - Google Patents

Abstract

PURPOSE:To sufficiently elevate the uprightness and sensitivity as an antenna of a titled antenna, by laminating steel having strong elasticity and copper having high electric conductivity. CONSTITUTION:A metallic band 1 which can be rolled in is a metallic band obtained by sticking a steel band 7 having strong elasticity and a copper band 8 having high electric conductivity, and is rolled into a vessel 2. A terminal of the metal 1 is fixed to a winding core 3. In the center of the winding core, a plug receiving hole 4 is provided. On one surface of the metallic band 1, graduations of a unit of length are provided. In this way, the uprightness is elevated, and the sensitivity as an antenna becomes satisfactory.

Description

[Detailed description of the invention] The present invention relates to an antenna for a portable receiver.

Multistage extendable rod antennas are used in portable receivers such as portable radios, portable televisions, and transceivers. Rod antennas are made of thin-walled copper pipes,
The disadvantage is that it is extremely brittle when bent and easily breaks.

As electronic circuit components become more densely integrated, the size of mobile receivers becomes smaller (from suitcase-sized to hook-sized and even watch-sized), and along with this, antennas are also required to be smaller. There is a limit to the strength of conventional rod antennas when they are made smaller.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a compact and robust antenna for a portable receiver.

For the above purpose, in the present invention, a convex rule is coupled to a portable receiver and used as an antenna.

A steel tape measure is curved in the width direction to make it stand upright, and is configured to be wound into a winding device, which is known as a convex rule. In this convex rule, the elasticity of the curved part is the cause of the uprightness, so a thin steel plate is used to obtain strong elasticity, but since steel does not have very high electrical conductivity, If this is used as it is as an antenna, full sensitivity to weak radio waves cannot be obtained.Therefore, in the present invention, we have developed a structure in which steel with strong elasticity and copper with high electrical conductivity are laminated. By solving the above-mentioned drawbacks, a portable receiver antenna having sufficient uprightness and sufficient sensitivity as an antenna was realized.

This will be explained below with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of an antenna used in a portable receiver of the present invention.

In this embodiment, the antenna 10 consists of independent convex rules. Retractable metal band 1
is wound into the container 2 by a metal band made by pasting together a steel band and a copper band, which will be explained in FIG. 2, and its end is fixed to the winding core 3. A plug receiver hole 4 is provided in the center of the winding core 3.

The stopper 5 and the spring 6 are members for maintaining the drawn-out length of the metal strip 1, and their functions will be described later.

In normal convex rules, the metal band consists of two parts, the first half and the second half.The first half is a part of the measure that is curved in the width direction and has a scale, and the second half is used to wrap around the measure. It is a coil spring part.

On the other hand, in the embodiment shown in FIG. 1, the metal strip 1 is constructed in one piece over its entire length, and the copper strip of the metal strip 1 ensures electrical continuity.

Furthermore, the end of the metal strip 1 is electrically connected to the wall surface of the hole 4 via a winding core 6 made of a conductive member.

Note that instead of using the winding core 6 as a conductive member, other methods, such as winding core 3
A conductive member buried in a through hole provided in the metal strip 1
The plug holder may be electrically connected to the wall of the hole 4.

FIG. 2 is a cross-sectional view in the width direction of the metal strip 1 in the embodiment of the present invention, in which the steel strip 7 and the copper strip 8 are stretched together and curved in the width direction to provide uprightness and at the same time It has sufficient electrical conductivity.

FIG. 3 is a side view showing the state in which the antenna 10 shown in FIG. 1 is attached to the portable receiver 11.

The antenna 10 is inserted into an antenna plug 9 provided on the back of the mobile receiver 11, and by rotating the plug 9 as an axis, the direction of the metal band 1 can be adjusted within a predetermined range. .

Since at least one side of the metal strip 1 is provided with a scale in units of length, the antenna 10, which is detachably coupled to the portable receiver 11, can be used as an independent convex rule.

In the embodiment shown in FIG. 1, the core 6 is fixed to the container 2, so when the first half of the metal strip 1 is pulled out, the second half wraps around the core 6 and acts as a coil spring. When the stopper 5 is closed by the spring 6, the metal band 1 held by the stopper 5 and the container 2 is automatically rolled up by the action of the coil spring when the stopper 5 is opened. . Therefore, only the first half of the metal band 1 is actually used as an antenna or a measure.

On the other hand, if the winding core 3 is separated from the container 2 and made rotatable, most of the metal strip 1 can be pulled out and used, which is advantageous in terms of volumetric efficiency. However, in this case, since there is no action equivalent to a coil spring, automatic winding is not performed, and it is necessary to rotate the winding core and wind it manually.

An example of a portable receiver equipped with such an antenna is shown in FIG.

FIG. 4 is a front view showing the appearance of the watch television. The watch television 12 is an ultra-small television that is attached to the wrist with a band 16, and has a display section 15, a speaker 16, and an operating member 17 arranged on the front. An antenna made of the metal band 1 according to the present invention is built into a portion 14. Reference numeral 14 denotes a lid that interlocks with the winding core, and by rotating this with a fingertip, the antenna is wound up. Even in the case of the built-in antenna in this embodiment, if a scale is provided on the surface of the metal band 1, it can be used as a small measuring tape.

As mentioned above, the portable receiver of the present invention is equipped with an antenna that can be stored extremely compactly and is difficult to break, and the antenna can also be used as a measuring tape, so it has no practical value. is a large one.

[Brief explanation of the drawing]

The drawings all show embodiments of the present invention; FIG. 1 is a sectional view of an antenna, FIG. 2 is a sectional view of a metal band, and FIG. 3 is a side view of a portable receiver equipped with the antenna of FIG. 1. , FIG. 4 is a front view of a watch television equipped with an antenna according to another embodiment. 1...Metal band 7...Steel band 8...Copper band 10...Antenna 11...Mobile receiver 1
2...Watch TV

Claims (1)

[Claims] An antenna for a mobile receiver characterized by incorporating a retractable metal band made of a laminate of steel and copper which is made upright by being curved in the width direction.