JPH09270616A - Antenna mount structure for portable equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a helical antenna and a case from being damaged through an excessive shock exerted to the helical antenna. SOLUTION: A bottom part 6 whose diameter is larger than a mount hole made to a case 2 is provided to this structure and a mount part 1b of a helical antenna 1 is fixed to a 1st cylindrical holder 5 with a throughhole 7 to which a connection pat 1c of the helical antenna 1 is inserted up to the bottom 6 and the helical antenna 1 is movably arranged to the hound hole 3 via the 1st holder 5 and a 2nd holder 11 of a blind cylinder shape is fixed in the case 2. A compression coil spring 9 is provided in the 2nd holder 11 and when a force such as an excessive shock is exerted to the helical antenna 1 in a direction of the arrow F, the compression coil spring 9 is compressed so as to allow the helical antenna 1 and the 1st holder 5 to be sunk altogether in the inside of the 2nd holder 11 freely thereby absorbing the shock.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting an antenna on a case of a portable device such as a mobile phone, and more particularly to an antenna mounting structure excellent in shock absorption.

[0002]

2. Description of the Related Art FIG. 5 is a sectional view showing an antenna mounting structure of a conventional portable device, and FIG. 6 is an exploded view thereof. As shown in these figures, in the conventional antenna mounting structure of this type, the rear end side of the helical antenna 21 is inserted into the stepped hole 23 formed in the case 22 according to the shape of the rear end side. The helical antenna 21 is fixed by fastening the inserted portion to the boss portion 24 formed inside the case 22 with the screw 25, and one end of the coaxial cable 26 is soldered to the end portion of the helical antenna 21. And the other end of the coaxial cable 26 is soldered to the electrode pad 28 formed on the substrate 27 fixed in the case 22 to connect the helical antenna 21 and the electronic components mounted on the substrate 27. It is electrically connected to an electric circuit composed of parts.

[0003]

However, in the above-mentioned conventional technique, when a strong impact is applied to the antenna part, for example, a portable device is accidentally dropped from the antenna side and the antenna part receives a drop impact. When a force is applied, the antenna is fixed and cannot withstand the shock, and the antenna itself or the case is damaged.

[0004]

In order to solve such a problem, the present invention provides an antenna mounting structure of a portable device for mounting an antenna in a case of the portable device, wherein the antenna is mounted in a mounting hole provided in the case. The antenna is arranged so as to be movable in the axial direction, and the antenna is biased by a biasing means so that the tip end side thereof projects outside the case.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the first embodiment, and FIG. 2 is an exploded view thereof. In the figure, reference numeral 1 denotes a helical antenna, which is a tip-side antenna body 1a, a mounting portion 1b having a diameter smaller than that of the antenna body 1a and a threaded outer periphery, and a rear portion having a diameter smaller than the mounting portion 1b. It has a structure in which the connection portion 1c on the end side is sequentially formed.

Reference numeral 2 is a case, 3 is a mounting hole provided in the case 2, and 4 is a boss formed in the case 2. Reference numeral 5 denotes a first holder having a cylindrical shape with a bottom, and the outer diameter of the bottom portion 6 thereof is formed to be larger than the diameter of the mounting hole 3 of the case 2. The bottom portion 6 has a through hole 7 through which the connecting portion 1c is inserted. It is provided.

Reference numeral 8 is a cylindrical insert fixed to the inside of the first holder 5, and the inserter and the inner surface of 8 are provided with a screw corresponding to the screw cut on the outer periphery of the mounting portion 1b of the helical antenna 1. Has been. 9 is a compression coil spring,
10 is a coaxial cable. Reference numeral 11 denotes a bottomed cylindrical second holder. This second holder 11 has an inner diameter larger than the outer diameter of the bottom portion 6 of the first holder 5, and the coaxial cable 10 is passed through the bottom portion. A through hole 12 is provided, and a tongue-shaped fixing portion 13 is formed on the lower surface of the bottom so as to project.

Reference numeral 14 is a mounting screw, 15 is a substrate 16, and electrode pads are formed on the substrate 15. These components are assembled as follows. First, the mounting portion 1b of the helical antenna 1 is screwed and fixed to the insert 7 fixed inside the first holder 5, whereby the helical antenna 1 is integrated with the first holder 5, and at the same time, the helical antenna is Antenna 1 connection part 1c
Through the through hole 7 provided in the bottom portion 6 of the first holder 5, and one end of the coaxial cable 10 is soldered to the connecting portion 1c.

Then, the coaxial cable 10 is passed through the compression coil spring 9, and the coaxial cable 10 is pulled out from the inside of the second holder 11 through the through hole 12 provided at the bottom thereof. The compression coil spring 9 is housed in the second holder 11, and the bottom portion 6 of the first holder 5 is superposed on the compression coil spring 9. After that, the first holder 5 is inserted from the inside of the case 2 into the mounting hole 3 so that the antenna body 1 a of the helical antenna 1 projects from the surface of the case 2, and the fixing portion 13 of the second holder 11 is arranged. Is fixed to the boss 4 formed in the case 2 with a mounting screw 14, and the other end of the coaxial cable 10 is soldered to the electrode pad 16 of the substrate 15 fixed in the case 2.

In this way, the helical antenna 1 is attached to the case 2 of the portable device. In this attached state, the upper end surface of the second holder 11 abuts the inner surface of the case 2, and the first holder 5 Since the upper surface of the bottom portion 6 is pressed against the inner surface of the case 2 by the urging force of the compression coil spring 9, the helical antenna 1 integrated with the first holder 5 is held with sufficient force for self-standing. .

Further, the helical antenna 1 is connected via a coaxial cable 10 to an electric circuit made up of electronic parts (not shown) mounted on the substrate 15 and exerts a desired function. Therefore, in such a mounting structure, when the helical antenna 1 receives an external force, that is, a force from the direction indicated by the arrow F in FIG. 1, the compression coil spring 9 bends, and the helical antenna 1 and the first holder 5 move. It freely moves so as to sink into the second holder 11 integrally.

Therefore, according to this embodiment, even when the helical antenna 1 is subjected to an excessive impact such as a drop, the compression coil spring for urging the first holder 5 integrated with the helical antenna 1 is urged. Since the bending of 9 absorbs the impact force, the helical antenna 1 and the case 2
It is possible to obtain an effect that damage of the can be prevented. FIG. 3 shows the second
4 is an exploded view of the embodiment, and in this embodiment, a cylindrical elastic rubber 17 is used instead of the compression coil spring 9 in the first embodiment described above. The configuration of is the same as that of the first embodiment.

Also in the second embodiment as described above, the elastic rubber 17 acts in the same manner as the compression coil spring 9 in the first embodiment to absorb the shock, so that the same effect can be obtained.

[0014]

As described above, according to the present invention, in an antenna mounting structure of a portable device for mounting an antenna in a case of the portable device, the antenna is arranged in a mounting hole provided in the case so as to be movable in its axial direction. Along with the structure in which the antenna is biased by the biasing means so that the tip end side of the antenna projects to the outside of the case, the biasing means that biases the antenna when an excessive shock due to a drop or the like is applied to the antenna. Because it absorbs the shock by bending,
The effect of preventing damage to the antenna and the case is obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is an exploded view of the first embodiment.

FIG. 3 is a sectional view showing a second embodiment of the present invention.

FIG. 4 is an exploded view of the second embodiment.

FIG. 5 is a sectional view showing a conventional example.

FIG. 6 is an exploded view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Helical antenna 1a Antenna main body 1b Mounting part 1c Connection part 2 Case 3 Mounting hole 5 First holder 6 Bottom part 7 Through hole 9 Compression coil spring 11 Second holder 13 Fixing part 14 Mounting screw 15 Board 17 Elastic rubber

Claims (4)

[Claims] 1. An antenna mounting structure for a portable device, wherein an antenna is attached to a case of the portable device. The antenna is arranged in a mounting hole provided in the case so as to be movable in an axial direction thereof, and the antenna has a tip end side of the antenna. An antenna mounting structure for a mobile device, characterized in that it is biased by a biasing means so as to project to the outside of the case. 2. The antenna mounting structure for a portable device according to claim 1, further comprising a bottom portion having a diameter larger than that of the mounting hole formed in the case,
The middle portion of the antenna is fixed to a cylindrical first holder having a through hole for passing the rear end side of the antenna in the bottom portion, and the antenna is movably arranged in the mounting hole through the first holder. In addition, a cylindrical second holder having a bottom portion is fixed in the case, and urging means is provided in the second holder, and the bottom portion of the first holder is fixed to the case by the urging means. An antenna mounting structure for a mobile device, wherein the antenna is biased via a first holder so as to come into contact with an inner surface. 3. The antenna mounting structure for a portable device according to claim 1, wherein a compression coil spring is used as the urging means. 4. The antenna mounting structure for a mobile device according to claim 1, wherein a cylindrical elastic rubber is used as the urging means.