JP3094326B2 - Antenna and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible antenna used for a so-called mobile communication device such as a portable telephone and a method of manufacturing the antenna.

[0002]

2. Description of the Related Art The development and spread of mobile communication devices in recent years have been remarkable, and among them, the spread of mobile phones and the like has been particularly rapid. For its rapid spread,
Improvements in mobile phone performance, that is, improvements in sensitivity, miniaturization, and weight reduction have greatly contributed.

At present, the frequency of radio waves used by portable telephones generally ranges from 0.7 GHz to 1.6 GHz. As the antenna, a rod having a simple structure and a length of about 10 cm and a thickness of about 1.0 mm is generally used as an antenna element. Today, rod-shaped (whip) and helical antenna structures are mainly used.

[0006] As shown in FIG. 6, a helical antenna has an element B attached to a sleeve 5 having an element A9.
A fixing base 8 for fixing a helical coil 6 of 10a is installed, a sleeve 5 having an element A9 is provided on the fixing base 8, and a helical coil 6 formed by spirally winding a piano wire or a stainless steel wire is fixed by solder 7. It is.

[0005]

However, this conventional antenna has disadvantages in that the cost is high and the accuracy of the coil is poor, so that the characteristics are varied, the quality is poor, and it is difficult to manufacture.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an antenna which is inexpensive, has high coil accuracy, has stable characteristics and is easy to manufacture, and a method of manufacturing the same.

[0007]

According to the present invention, an antenna coil element mounted on one surface of a fixed base is provided.
At the other end of the sleeve attached at one end to the other side.
In the antenna having a digit rod-shaped antenna element, the antenna coil element, wherein the fixing base one
Has an end surface facing the other surface and an outer surface intersecting the end surface
That insulation and body, on the end face of the opposing insulator, and said end
Connected at the intersection line of the surface and the outer surface and on the outer surface with a predetermined width
A contact portion made of formed metal coating, said con
Connected to the tact part and along the outer surface on it
An antenna coil comprising a spirally formed spiral conductor; and an antenna coil provided on the opposed end face having the contact portion.
The antenna core is attached to the sleeve via the fixing base.
Antenna according to claim Rukoto which have a a sleeve mounting screw portion for mounting the yl elements is obtained.

[0008] In the above configuration, the antenna includes a mounting screw portion.
Eliminates the need for solder and facilitates assembly.

In the above antenna, it is preferable that the insulator is any of a rod, a bottomed cylinder, and a flat plate.

According to the present invention, the insulator and the mounting described above are provided.
A method for manufacturing an antenna, comprising:
All the front surface to form a conductive metallic film, one surface of the insulator
The binding side arrangement of the spiral conductor and fixing base formed
Formed on the peripheral surface and connected to the spiral conductor on the same plane
The metallic coating is removed while leaving the conductor part of the contact part
Thus, a method for manufacturing an antenna , which is characterized in that it is removed, is obtained.

According to the present invention, in the above-described method for manufacturing an antenna, the formation of the metallic film conductor includes the step of forming the surface of the insulator.
The preferable to employ a means for metallic Kotin grayed
No. In addition, to remove the metallic film,
Hand trimming the removed part of the formed metallic coating
Preferably, steps are used.

[0012]

Embodiments of the present invention will be described.

FIG. 1 is a perspective view showing a completed antenna of the present invention. FIG. 2 is a perspective view showing an insulator of an antenna coil used for the antenna of the present invention. FIG. 3 is a perspective view showing an insulator formed with a metallic film used for the antenna of the present invention. FIG. 4 is a perspective view showing an element B having an antenna coil used for the antenna of the present invention. FIG. 5 is an enlarged front view showing a contact portion and a sleeve mounting screw portion of an antenna coil used for the antenna of the present invention.

[0014] The antenna of the present invention, as shown in FIG.
An element B10 at the time of contraction composed of an antenna coil 11 in which a spiral conductor 2a is applied to a rod-shaped insulator 1, and a fixing base 8 for fixing the element B10 and the antenna coil 11
And a sleeve 5 installed at a position facing the element B10 via the fixing base 8, and an extended element A9 provided at the other end of the sleeve 5.

[0015] The antenna of the present invention is attached and fixed to a device body by a holder (not shown). In the extended state, the element A9 and the element B10 exist so as to completely protrude outside the apparatus main body, and in the contracted state, only the element B10 exists outside the apparatus main body.

The element A9 functions as an antenna in the extended state, so that power is not supplied to the element B10. Therefore, in the extended state, the element B10 does not work as an antenna.

The element B10 functions as an antenna in a contracted state, and power is not supplied to the element A9. Therefore, in the contracted state, the element A9 does not work as an antenna.

Next, a method for manufacturing the antenna of the present invention will be described.

As the element B10 of the antenna coil used for the antenna of the present invention, as shown in FIG. 2, an insulator 1 made of a cylindrical organic resin having an outer diameter of 3φ and a length of 12 mm was used.

The insulator 1 may be a rod such as a cylinder, a prism, a cylinder, a flat plate, or the like.

Next, as shown in FIG.
Metallic coating 2 was applied. The metal film 2 was formed by plating an underlayer on the insulator 1 by electroless plating, and by plating Cu with high conductivity. Alternatively, Ni plating or the like may be used. Further, as a method for forming the metallic film, a metallic film forming means such as metallic coating, metallic vapor deposition, sputtering and the like may be used.

Next, as shown in FIG. 4, the antenna coil 11 used in the antenna of the present invention is obtained by trimming the insulator 1 provided with the metallic coating 2 shown in FIG. The metal film is left in a spiral shape, and the others are completely removed to form a spiral conductor 2a. The metallic film is left on the contact portion 3 at one end of the insulator 1.
The sleeve mounting screw 4 is attached to the insulator 1 in the axial direction.

As shown in FIG. 5, the coupling portion between the conductors of the spiral conductor 2a and the contact portion 3 subjected to the insulator 1 is threadedly
The conductor of the contact part 3 is dimension X on the same plane as the spiral conductor 2a.
If it is processed by leaving the width of 2 to 3 mm , it will not be damaged.

As shown in FIG. 1, an element B10 having an antenna coil having a helical conductor formed on an insulator 1 is attached to a fixing base 8 via a contact portion by a sleeve mounting screw portion. The sleeve 5 to which the metal rod-shaped element A9 is attached is installed at a position facing the same axis as the above, and the antenna of the present invention is completed.

According to the antenna of the present invention, the element B provided with the helical metal film has good dimensional accuracy and thus has little variation in characteristics. Also, it can be manufactured easily and inexpensively.
Since the sleeve mounting member is also provided with a screw portion and is screwed, soldering is not required, and assembly is easy.

[0026]

As described above, according to the present invention, it is possible to provide an antenna which is inexpensive, has good coil accuracy, has stable characteristics, is easy to manufacture, and a method of manufacturing the same.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a completed product of an antenna of the present invention.

FIG. 2 is a perspective view showing an insulator of an antenna coil used for the antenna of the present invention.

FIG. 3 is a perspective view showing an insulator provided with a metallic film used for the antenna of the present invention.

FIG. 4 is a perspective view showing an element B having an antenna coil used for the antenna of the present invention.

FIG. 5 is an enlarged front view showing a contact portion and a sleeve mounting screw portion of an antenna coil used in the antenna of the present invention.

FIG. 6 is a front view showing a conventional antenna.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulator 2 Metallic film 2a Spiral conductor 3 Contact part 4 Sleeve mounting screw part 5 Sleeve 6 Helical coil 7 Solder 8 Fixed base 9 Element A 10, 10a Element B 11 Antenna coil

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01Q 1/24

Claims (5)

(57) [Claims] 1. An antenna mounted on one surface of a fixed base.
Mounted at one end to the antenna coil element and the other surface
In the antenna having a rod-shaped antenna element provided at the other end of the sleeve, the antenna coil elementary
The end surface facing one surface of the fixing base and the end surface
An insulator having an intersecting outer surface ; and the insulator facing the insulator.
Connected at the end face and at the intersection of the end face and the outer face.
A contact portion made of a metallic coating formed on the outer surface with a predetermined width , and a contact portion connected to the contact portion;
A spiral conductor formed spirally along the outer surface
Antenna coil and the contact portion
For mounting the antenna coil element to the sleeve via the fixing base provided on the opposite end face .
Antenna according to claim Rukoto which have a a sleeve mounting screw section. 2. The antenna according to claim 1, wherein the insulator is one of a rod, a bottomed cylinder, and a flat plate. 3. The antenna coil according to claim 1,
In the method for manufacturing an antenna comprising a Remento, to form a conductive metallic film on the entire surface of the insulator, the outer surface of the insulator
A spiral conductor and the opposed end faces of the insulator on the
Leaving the conductor portion serving as a contact portion connecting to the spiral conductor is formed on the outer surface at a predetermined width, a manufacturing method of the antenna, characterized in that the removal of the metal coating. 4. The method of manufacturing an antenna according to claim 3, wherein the metallic coating conductor is formed by using a metallic coating.
A method for manufacturing an antenna, comprising: 5. The method for manufacturing an antenna according to claim 3, wherein
In order to remove the metallic film,
For trimming the removed portion of the metallic coating
A method for manufacturing an antenna, comprising: