JPH10270920A - Antenna structure for small radio receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deformation of a loop antenna and to automate assembly by providing structure where a loop antenna element is engaged with a substrate by means of notch parts provided for three places to fix it. SOLUTION: The notch parts are provided for both ends of the loop antenna element 2 formed by a material with low skin effect or a material where the surface of a copper band is plated by gold, silver and the like and for a folding part. On the other hand, notch parts are provided for the substrate 1 so that they are engaged with the notch parts, and lands 8, 9 and 11 are respectively formed. The loop antenna element 2 is inserted into the substrate 1 from the right side direction of a drawing, the notch parts are mutually engaged and the loop antenna element 2 is fixed by soldering it to the lands 8, 9 and 11 provided for the substrate 11. Since simple structure where the loop antenna element 2 is engaged with the substrate 1 is provided, assembly is automated and the loop antenna element 2 is difficult to deform since it is fixed by three places.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an antenna structure for a small radio receiver.

[0002]

2. Description of the Related Art A conventional antenna structure for a small radio receiver will be described in detail with reference to the drawings.

FIGS. 5A to 5C are perspective views showing a conventional example. The antenna structure for a small radio receiver shown in FIG. 5 includes a substrate 16 having through holes 17a and 17b in a feeding portion, and a loop antenna element 15 having one end inserted into the through hole 17a and the other end inserted into the through hole 17b.
It is comprised including. (For example, Japanese Patent Application Laid-Open No.
The loop antenna element 15 is disposed so as to include both sides of the substrate 16. With such an arrangement, it is easier to increase the opening area of the antenna as compared with the case where the antenna is arranged on one side of the substrate.

[0004]

The above-mentioned conventional antenna structure for a small radio receiver has a drawback that the opening area may be reduced because it is easily deformed at the time of mounting.

[0005]

An antenna structure for a small radio receiver according to a first aspect of the present invention has a first notch at one end and a second notch at the other end, and has a second cutout at the other end. A loop antenna element having three notches, fourth, fifth, and sixth notches engaged with the first, second, and third notches of the loop antenna element; And a substrate having first, second, and third lands provided in the sixth notch.

According to a second aspect of the present invention, in the first aspect, the loop antenna element is inserted into the substrate and soldered to the first, second, and third lands. .

[0007]

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

FIG. 1 is an assembled perspective view showing an embodiment of the present invention, FIG. 2 is a perspective view showing details of a loop antenna element shown in FIG. 1, and FIG. 3 is a perspective view showing details of a substrate shown in FIG. is there.

The antenna structure for a small radio receiver shown in FIGS. 1, 2 and 3 has a cutout portion 12 at one end, a cutout portion 13 at the other end, and a cutout portion 14 at a folded portion. The loop antenna element 2, the notches 6, 7, 10 that engage with the notches 12, 13, 14 of the loop antenna element 2 and the lands 8, 9, 11 provided in the notches 6, 7, 10 are And a substrate 1 having the same.

The loop antenna element 2 is inserted into the board 1 from the right side in FIG. 1 and soldered to the lands 8, 9, 11 of the board 1. The soldering of the substrate 1 to the lands 11 is for preventing deformation of the loop antenna element 2, and there is no electrical connection.

The lands 8 and 9 serve as feed terminals of the loop antenna element 2.

The loop antenna element 2 is made of a material having a low skin effect or a material obtained by plating the surface of a copper strip with gold, silver, or the like.

FIG. 4 is an enlarged partial perspective view of FIG.

[0014]

The antenna structure for a small radio receiver according to the present invention has a simple structure in which the loop antenna element and the board are engaged with each other, so that the assembly can be automated. The loop antenna element is fixed to the board at three places. There is an effect that it is difficult to be deformed.

[Brief description of the drawings]

FIG. 1 is an assembled perspective view showing one embodiment of the present invention.

FIG. 2 is a perspective view showing details of a loop antenna element shown in FIG. 1;

FIG. 3 is a perspective view showing details of a substrate shown in FIG. 1;

FIG. 4 is an enlarged partial perspective view of FIG. 1;

FIGS. 5A to 5C are perspective views showing an example of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 2 Loop antenna element 6,7 Notch 8,9 land 11 Land 12,13,14 Notch

Claims (2)

[Claims] A first notch at one end and a second notch at the other end;
A loop antenna element having a notch portion and a third notch portion in a folded portion;
The fourth, fifth, and sixth notches that mesh with the second, third, and notches, and the first, second, and third notches provided in the fourth, fifth, and sixth notches. An antenna structure for a small radio receiver, comprising: a substrate having a land. 2. The antenna structure for a small radio receiver according to claim 1, wherein said loop antenna element is inserted into said substrate and soldered to said first, second and third lands.