JPH11163613A - Antenna contact structure - Google Patents

Abstract

(57) [Problem] To improve workability and yield and to reduce product cost by omitting a metal antenna nut in an antenna contact structure. An antenna is fixed to a housing via an antenna holder formed at a base of the antenna. One end of an antenna contact is engaged with the antenna holder, and the other end is a wiring board inside the housing. 6, the antenna holder is electrically connected to the wiring board via the antenna contact without passing through the metal antenna nut.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna used for various wireless devices such as a portable telephone, and particularly to a contact structure.

[0002]

2. Description of the Related Art A radio device, especially a small radio device such as a cellular phone, has a telescopic antenna for receiving and transmitting a signal, and the antenna is connected to a wiring board housed in a housing by a required means. ing. A conventional antenna contact structure will be described with reference to FIGS.

First, an example of a conventional antenna contact structure will be described with reference to FIG.

[0004] A metal antenna nut 2 is press-fitted or fitted into the housing 1 and then bonded thereto. An antenna holder 4 formed at the base of the antenna 3 is screwed to the antenna nut 2. One end of a lead wire 5 is soldered to the antenna nut 2, and the other end of the lead wire 5 is soldered to a wiring board 6 inside the housing 1. The antenna 3 is electrically connected to a wiring pattern (not shown) of the wiring board 6 via the antenna holder 4, the antenna nut 2, and the lead wire 5.

FIG. 8 shows another conventional antenna contact structure in which an antenna contact 8 is used in place of the lead wire 5. The antenna contact 8 has a spring property soldered to the wiring board 6, and when the wiring board 6 is mounted in the housing 1, the antenna contact 8 comes into contact with the antenna nut 2. Is what it is. Therefore, the antenna 3 is electrically connected to the wiring board 6 via the antenna holder 4, the antenna nut 2, and the antenna contact 8.

FIG. 9 shows still another conventional example. An antenna 3 is screwed to an antenna nut 2 via an antenna holder 4, and the antenna nut 2 and the wiring board 6 are electrically connected via an antenna contact 10. The antenna contact 10 has a ring portion 10a and a contact portion 10b, the ring portion 10a is caulked or soldered to the inner end of the antenna nut 2, and the antenna contact 10 When the wiring board 6 is attached while being fixed to the antenna nut 2, the contact portion 10 b comes into contact with a wiring pattern (not shown) of the wiring board 6.

[0007]

In each of the above-mentioned conventional antenna contact structures, an antenna nut 2 is interposed to electrically connect the antenna 3 and the wiring board 6. The antenna nut 2 is pressed into the housing 1 as described above,
Or it is glued after fitting. In order to press-fit the antenna nut 2 accurately without tilting, an elaborate press-fitting jig is required, which increases the number of work steps and requires work and skillful attention of the operator, resulting in poor workability and yield. There was a problem. Furthermore, in order to prevent the housing 1 from being damaged and to secure an appropriate holding force, an accurate press-fitting margin is required, and therefore, it is necessary to strictly control the dimensional accuracy of the parts. Therefore, there is a problem that the manufacturing cost of the parts increases. Further, when bonding the antenna nut 2, it is necessary to pay careful attention so that the adhesive does not adhere to the conductive surface of the antenna nut 2, and the workability is poor.

Further, the antenna nut 2 must be made of metal, so that the weight becomes heavy, and furthermore, the antenna holder 4, the antenna contacts 8, the antenna contacts 10, etc.
In consideration of the electrical continuity between the substrate and the wiring substrate 6, there is a problem that the cost of parts increases, for example, a usable metal is a copper alloy, and a surface treatment such as plating is required.

In view of such circumstances, the present invention is intended to improve workability, yield, and reduce product cost by omitting a metal antenna nut.

[0010]

According to the present invention, an antenna is fixed to a housing via an antenna holder formed at a base of the antenna.
The present invention relates to an antenna contact structure in which one end of an antenna contact is engaged with the antenna holder and the other end is electrically connected to a wiring board inside the housing. One end of the antenna contact is connected to a flange of the antenna holder and the housing. The present invention relates to an antenna contact structure in which the housing is sandwiched between one end of the antenna contact and the flange,
The present invention also relates to an antenna contact structure in which a synthetic resin antenna nut is screwed into an antenna holder and the antenna holder is fixed to a housing. Also, an antenna nut holding hole is formed in the housing, and the antenna nut holding hole is formed in the antenna nut holding hole. And one end of the antenna contact is a plate screw portion, the antenna holder is screwed to the plate screw portion, and the plate screw portion and the flange portion form a housing. An antenna contact structure in which one end of the antenna contact is a cylindrical portion, the antenna holder is screwed into the cylindrical portion, and a housing is sandwiched between the cylindrical portion and the flange portion. According to the structure, further, a retaining groove is engraved in the antenna holder, a retaining ring portion is formed in the antenna contact, the retaining ring portion is fitted into the retaining groove, and the flange portion of the antenna holder is provided with the retaining ring portion. The present invention relates to an antenna contact structure in which a ring portion is fitted, and a housing is sandwiched between a flange portion and the retaining ring portion. The antenna holder is electrically connected to a wiring board via an antenna contact without passing through a metal antenna nut. This eliminates the step of press-fitting the antenna nut to fix the antenna holder.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, the same components as those shown in FIG. 7 are denoted by the same reference numerals, and description thereof will be omitted.

An antenna nut holding hole 15 for fitting an antenna nut is formed in the housing 1.
The five drilled portions are made thick so that steps 16a and 16b are formed at both ends of the antenna nut holding hole 15. An antenna nut 17 is fitted into the antenna nut holding hole 15.

A flange 18 is formed on the antenna nut 17, and when the antenna nut 17 is fitted in the antenna nut holding hole 15, the flange 18 contacts the step 16b inside the housing. In contact with the antenna nut 1
7 is shorter than the length of the antenna nut holding hole 15, and
The nut holding rib 19 formed in the above-mentioned portion holds a part of the flange portion 18 between the step portion 16b.

The antenna holder 4 is screwed to the antenna nut 17 to hold an antenna contact 20 between the step 16a on the outer surface and the flange 4a of the antenna holder 4.

The antenna contact 20 has a seat 20a clamped between the antenna holder 4 and the step 16a.
And a contact portion 20b which is continuous with the seat portion 20a at a right angle and which is bent in a U-shape. The contact portion 20b passes through a notch portion 21 formed in the antenna nut holding hole 15 and the housing 1
It extends inside, and the tip of the contact portion 20b is in contact with the antenna circuit of the wiring board 6.

In this embodiment, the antenna nut 17 is used.
Is inserted into the housing 1, the antenna contacts 20 are further inserted, and the antenna holder 4 is screwed into the antenna nut 17, so that electrical contact between the antenna holder 4 and the wiring board 6 is realized. The work process is simplified without the need for soldering. Further, since the antenna nut 17 is not in contact with the antenna contact 20, there is no problem such as electric corrosion, any material may be used, and there is no particular restriction on the surface treatment. Further, the antenna nut 17 can be made of a synthetic resin material, so that the weight can be reduced and the cost of parts can be reduced.

Referring to FIG. 2, a second embodiment will be described.

In the second embodiment, the antenna nut 17 in the first embodiment is omitted, and the screw 22 is directly carved in the antenna nut holding hole 15.

A slit hole 23 is formed in parallel with the antenna nut holding hole 15, and the above-mentioned antenna contact 20 is inserted into the slit hole 23. The antenna holder 4 is screwed into the antenna nut holding hole 15 and the seat 20 is
a between the step portion 16a and the antenna holder 4 to secure electrical continuity between the antenna holder 4 and the antenna contact 20 and to connect the tip end of the contact portion 20b to the wiring board 6.
The antenna holder 4 is electrically contacted with the wiring board 6 via an antenna contact 20.

In the second embodiment, since the antenna nut 17 is omitted, the number of parts is reduced, the cost of parts is reduced, and the number of assembling steps is reduced.
Product price is reduced.

The third embodiment shown in FIG.
A groove 26 in the generatrix direction is formed in the antenna nut holding hole 15, and the groove 26 communicates with the inside of the housing 1. The antenna contact 25 is formed by forming a hook 25a in place of the seat 20a in the above-mentioned antenna contact 20, and the hook 25a is connected to the flange 4
a between the antenna contact 25 and the antenna holder 4, the electrical contact between the antenna contact 25 and the antenna holder 4 depends on the hook portion 25a, the flange portion 4a and the screw portion of the antenna holder 4. And the contact portion make electrical contact,
The tip of the antenna contact 25 is in electrical contact with the wiring board 6.

Also in the third embodiment, the antenna nut 17 can be omitted as in the above-described second embodiment, the number of parts is reduced, the parts cost is reduced, and the number of assembling steps is reduced. , The product price is reduced.

FIG. 4 shows a fourth embodiment.

A facing seat 30 in which a holder mounting seat 29 is formed in the housing 1 and a gap 31 is formed inside the holder mounting seat 29.
Is provided. The antenna contact 28 includes a plate screw portion 28a having a screw hole formed therein and a contact portion 28b which is continuous with the plate screw portion 28a at a right angle and bent in a substantially rectangular shape.

The screw portion 28a is inserted into the gap 31, and the screw portion of the antenna holder 4 is inserted into the holder mounting seat 29.
And through the plate screw portion 28a and through the facing seat 30. The antenna holder 4
By tightening the antenna holder 4, the plate screw portion 28a
, The electrical contact between the antenna holder 4 and the antenna contact 28 is ensured, and the tip of the contact portion 28b is in electrical contact with the wiring board 6. In this embodiment, the antenna nut can be omitted, and the screw portion of the antenna nut holding hole 15 in the second and third embodiments described above can be omitted.

FIG. 5 shows a fifth embodiment.

A holder mounting seat 29 is formed on the housing 1, and a protruding piece 35 is formed so as to face the holder mounting seat 29 at a required interval. The antenna contact 33 has a cylindrical portion 33a and the cylindrical portion 33a.
And a contact portion 33b which is continuous in a V-shape.

The cylindrical portion 33a is fitted between the holder mounting seat 29 and the projecting piece 35, and the contact portion 33b is brought into electrical contact with the wiring board 6. The screw portion of the antenna holder 4 is inserted into the holder mounting seat 29 and screwed to the cylindrical portion 33a.

The antenna holder 4 is fixed to the housing 1 by screwing with the cylindrical portion 33a, and is electrically connected to the antenna contact 33.
Electrical conduction is made to the wiring board 6 via 3b.

FIG. 6 shows a sixth embodiment.

A flange 4a is formed on the antenna holder 4 and a fitting 4b is formed continuously with the flange 4a.
Is formed, and a stop groove 38 is formed in the fitting portion 4b. The antenna contact 37 is composed of a snap ring portion 37a fitted into the retaining groove 38 and a contact portion 37b continuous in a U-shape with the retaining ring portion 37a.
A notch is formed so as to be able to be fitted into the stop groove 38 and a hole which can be fitted into the hole.

After the fitting portion 4b is inserted through the holder mounting seat 29, the retaining ring portion 37a is fitted into the retaining groove 38. The flange portion 4a and the retaining ring portion 37a sandwich the holder mounting seat 29, and the antenna holder 4 is fixed to the housing 1. The contact portion 37b contacts the wiring board 6, and the antenna holder 4 is electrically connected to the wiring board 6 via the antenna contact 37.

[0034]

As described above, according to the present invention, a metal antenna nut is not required, so that a press-fitting step and a bonding step of parts for fixing the antenna holder are eliminated.
The number of steps is reduced, workability is improved, and dimensional accuracy control of parts is facilitated, and accidents such as cracking of the housing at the time of press-fitting and falling off of parts can be prevented. Since there are no metal parts, weight reduction can be achieved, and there is no need to consider electrolytic corrosion, and an excellent effect that there is no need to limit the material of the metal and eliminate the need for surface treatment.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view of a main part showing a second embodiment of the present invention.

FIG. 3 is a sectional view of a main part showing a third embodiment of the present invention.

FIG. 4 is a cross-sectional view of a main part showing a fourth embodiment of the present invention.

FIG. 5 is a sectional view showing a main part of a fifth embodiment of the present invention.

FIG. 6 is a cross-sectional view of a principal part showing a sixth embodiment of the present invention.

FIG. 7 is a sectional view of a main part of a conventional example.

FIG. 8 is a sectional view of a main part of another conventional example.

FIG. 9 is a sectional view of a main part of still another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 3 Antenna 4 Antenna holder 4a Flange part 6 Wiring board 15 Antenna nut holding hole 17 Antenna nut 20 Antenna contact 20a Seat part 20b Contact part 25 Antenna contact 28 Antenna contact 28a Plate screw part 29 Holder mounting seat 33 Antenna contact 33a cylinder Part 37 Antenna contact 37a Retaining ring part 38 Stop groove

Claims (8)

[Claims] An antenna is fixed to a housing via an antenna holder formed at a base of the antenna, and one end of an antenna contact is engaged with the antenna holder and the other end is electrically connected to a wiring board inside the housing. An antenna contact structure. 2. The antenna contact structure according to claim 1, wherein one end of the antenna contact is sandwiched between a flange of the antenna holder and the housing. 3. The antenna contact structure according to claim 1, wherein a housing is sandwiched between one end of the antenna contact and said flange. 4. The antenna contact structure according to claim 2, wherein an antenna nut made of synthetic resin is screwed into the antenna holder, and the antenna holder is fixed to the housing. 5. An antenna nut holding hole is formed in a housing,
3. The antenna contact structure according to claim 2, wherein an antenna holder is screwed into said antenna nut holding hole. 6. An antenna according to claim 3, wherein one end of the antenna contact is a plate screw portion, said antenna holder is screwed into said plate screw portion, and a housing is sandwiched between said plate screw portion and said flange portion. Contact structure. 7. The antenna contact structure according to claim 3, wherein one end of the antenna contact is a cylindrical portion, said antenna holder is screwed into said cylindrical portion, and a housing is sandwiched between said cylindrical portion and said flange portion. 8. A retaining groove is formed in the antenna holder, a retaining ring portion is formed in the antenna contact, the retaining ring portion is fitted in the retaining groove, and the retaining ring portion is fitted in a flange portion of the antenna holder. 4. The antenna contact structure according to claim 3, wherein the housing is held between the flange portion and the retaining ring portion.