JP2001085919A - Antenna for radio unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an antenna for a radio unit where a multi-point contact is adopted for the contact between an antenna contact and a main body side contact, a foreign material can be eliminated even when it is interposed between the antenna contact and the main body side contact so as to ensure the contact between the antenna contact and the main body side contact thereby obtaining an effective electric connection. SOLUTION: The antenna for a radio unit is provided with a screw part 2 and the antenna contact 3 projected from the screw part 2, fitted to a radio unit case 4 by screwing the screw part 2 to a through-hole 5 provided to the case 4 to contact the antenna contact 3 and the main body side contact 6 provided in inside the radio unit case 4 thereby electrically conducting the antenna contact 3 and the main body side contact 6. The antenna contact 3 is made of a columnar conductor and the main body side contact 6 is made of a folded metallic plate configuring at least two tilted side plates open in a direction of the antenna contact 3 to receive the antenna contact 3 inwardly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio antenna.

[0002]

2. Description of the Related Art FIG. 2 is a partially cut-away side view showing a conventional radio antenna (hereinafter referred to as an antenna).
(A) is a state before the antenna is attached to the radio body,
(B) shows a state where the antenna is attached to the wireless device body.

As shown in the figure, a cylindrical screw portion 12 for attaching the antenna 11 to a radio device case 14 is provided at a lower end of the antenna 11.
A lower end of the antenna 2 has a hemispherical tip for contacting the main body side contact 16 of the radio set provided inside the radio set 14 and electrically connecting the main body side contact 16 to the main body side contact 16. A contact 13 is provided. Note that a male screw is provided on the outer peripheral surface of the screw portion 12.

[0004] A through hole 15 for inserting the screw portion 12 of the antenna 11 and attaching the antenna 11 to the radio case 14 is provided on, for example, the upper surface of the radio case 14 for accommodating the radio main body. On the inner peripheral surface of the hole 15, there is provided a female screw that matches the male screw on the outer peripheral surface of the screw portion 12.

[0005] Inside the radio case 14, an antenna 1 is provided.
When the first screw portion 12 is inserted into the through hole 15 of the wireless device case 14 and the antenna 11 is mounted, the lower end of the screw portion 12 is in a position where the tip of the antenna contact 13 is in contact with the main body side made of a flat metal plate. A contact 16 is provided.

When the antenna 11 is attached to the wireless device case 14, the male screw of the screw portion 12 is connected to the wireless device case 14.
While being screwed into the female screw of the through hole 15 of the antenna contact 1
3 and the screw portion 12 are inserted into the through hole 15 of the wireless device case 14. When the insertion of the screw portion 12 into the through hole 15 is completed, the tip of the antenna contact 13 and the main body side contact 16 come into contact with each other, and the two are electrically connected.

[0007]

However, in such a conventional radio antenna, the tip of the antenna contact 13 is formed in a hemispherical shape, and the main body side contact 16 is formed in a flat plate shape. In addition, there is a problem in that the contact between the two becomes a point contact, and electrical conduction may be insufficient. Further, the tip of the antenna contact 13 and the main body side contact 1
In the case where a foreign substance is interposed between the first and second substrates, there is a problem that an effective electrical connection cannot be obtained.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The present invention provides a multi-point contact between an antenna contact and a main body side contact, and further includes a case where foreign matter is interposed between the antenna contact and the main body side contact. It is another object of the present invention to provide an antenna for a radio, which can ensure the contact between the antenna contact and the main body side contact and can obtain an effective electrical connection.

[0009]

In order to achieve this object, a radio antenna according to the present invention has a screw portion, an antenna contact protruding from the screw portion, and a through-hole provided in a radio device case. A wireless device for screwing the screw portion into the antenna device and bringing the antenna contact into contact with a body-side contact provided inside the wireless device case to electrically connect the antenna contact with the body-side contact In the antenna for
The antenna contact is made of a columnar conductor, and the main body-side contact is a bent metal plate forming at least two inclined side plates opened toward the antenna contact so as to receive the antenna contact inward. It is characterized by consisting of.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partially cut-away side view showing a radio antenna (hereinafter referred to as an antenna) according to the present invention. FIG. 1A shows a state before the antenna is attached to a radio main body. (B) is a state in which the antenna is attached to the radio device main body, and (c) is a front view and a side view showing the main body side contact in an enlarged manner.

As shown in the figure, at the lower end of the antenna 1,
A cylindrical screw portion 2 for attaching the antenna 1 to the radio device case 4 is provided, and a lower end of the screw portion 2 is connected to a main body side contact 6 of the radio device provided inside the radio device case 4. An antenna contact 3 formed in a cylindrical shape is provided for making electrical contact with the main body side contact 6 in contact therewith. Note that a male screw is provided on the outer peripheral surface of the screw portion 2.

A through hole 5 for inserting the screw portion 2 of the antenna 1 and attaching the antenna 1 to the radio case 4 is provided on, for example, an upper surface of the radio case 4 for housing the radio main body. On the inner peripheral surface of the hole 5, there is provided a female screw that matches the male screw on the outer peripheral surface of the screw portion 12.

When the screw portion 2 of the antenna 1 is inserted into the through hole 5 of the radio case 4 and the antenna 1 is mounted, the antenna contact 3 is received inside the radio case 4 so that the antenna contact 3 is received inside. The main body side contact 6 is formed of a bent metal flat plate that constitutes two inclined side plates that open in the direction of.

When the antenna 1 is mounted on the radio device case 4, the antenna contact 3 and the screw portion 2 are connected to the radio device while the male screw of the screw portion 2 is screwed into the female screw of the through hole 5 of the radio device case 4. It is inserted into the through hole 5 of the case 4. When the insertion of the screw portion 2 into the through hole 5 progresses, the shoulder portion 31 of the antenna contact 3 is inserted into the main body side contact 6 while rotating so as to push out the inclined side plate of the main body side contact 6, and the antenna contact 3 The contact 3 and the main body side contact 6 come into contact with each other, and the two are electrically connected.

In this antenna 1, at least the shoulder 31 of the cylindrical antenna contact 3 comes into contact with the inner surfaces of the inclined side plates of the main body side contact 6, so that the contact between the antenna contact 3 and the main body side contact 6 is large. Point contact is established, and the contact between the two is ensured, and the contact portion does not come off even when subjected to vibration, impact, or the like, and an effective electrical connection can be obtained.

Furthermore, since the shoulder 31 of the antenna contact 3 is inserted into the main body side contact 6 while rotating so as to push the inclined side plate of the main body side contact 6 open, the antenna contact 3
Even when a foreign substance is interposed between the main body side contact 6 and the main body side contact 6, the foreign substance is removed, and the antenna contact 3 and the main body side contact 6 are surely brought into contact.

In the above-described embodiment, the case where the main body side contact 6 is formed from two inclined side plates has been described. However, the main body side contact 6 is formed in a petal shape by using two or more inclined side plates. May be formed. In this case, since the shoulder 31 of the antenna contact 3 comes into contact with the inner surfaces of the plurality of inclined side plates of the main body side contact 6, the contact between the antenna contact 3 and the main body side contact 6 becomes more multipoint contact, and Even in the case of receiving vibration, impact, or the like, the contact portion is less likely to be separated, and more reliable electrical connection can be obtained.

In the above-described embodiment, the antenna contact 3 is formed in a cylindrical shape, but may be formed in a polygonal shape. Also in this case, the contact between the antenna contact 3 and the main body side contact 6 is a multipoint contact, and good electrical connection is obtained as in the case where the antenna contact 3 is formed in a cylindrical shape. When a foreign substance is interposed between the main body side contact 6 and the main body side contact 6, it is more effectively eliminated.

[0019]

As described above, the antenna for a radio device according to the present invention has a screw portion and an antenna contact protruding from the screw portion, and the screw portion is inserted into a through hole provided in the radio device case. The antenna contact is formed in a columnar shape in a radio antenna in which the antenna contact and the main body side contact provided inside the radio device case are brought into contact with each other to electrically connect the antenna contact and the main body side contact. The body-side contact is at least two open toward the antenna contact so as to receive the antenna contact inward.
Since the antenna contact is made of a bent metal flat plate forming at least one inclined side plate, at least the shoulder of the antenna contact comes into contact with the inner surfaces of the plurality of inclined side plates of the main body side contact, and the contact between the antenna contact and the main body side contact is large. It becomes a point contact, so that the contact between the two is ensured, and the contact part does not come off even when subjected to vibration, impact, etc., and an effective electrical connection can be obtained. Since the part is inserted into the main body side contact while rotating so as to push the inclined side plate of the main body side contact, even if a foreign substance is interposed between the antenna contact and the main body side contact, the foreign substance is eliminated, There is an effect that the antenna contact and the main body side contact surely come into contact with each other and a good electrical connection can be obtained.

[Brief description of the drawings]

FIG. 1 is a view showing an antenna for a wireless device according to the present invention.

FIG. 2 is a diagram showing a conventional radio antenna.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Antenna 2 ... Screw part 3 ... Antenna contact 31 ... Shoulder part 4 ... Radio equipment case 5 ... Through-hole 6 ... Body side contact

Claims (1)

[Claims] 1. A wireless communication device comprising: a screw portion; and an antenna contact protruding from the screw portion, wherein the screw portion is screwed into a through hole provided in a wireless device case, and is attached to the wireless device case. In a radio antenna for electrically connecting the antenna contact and the main body side contact by contacting the main body side contact provided therein, the antenna contact is made of a columnar conductor, and the main body side contact is And a bent metal flat plate forming at least two inclined side plates opened toward the antenna contact so as to receive the antenna contact inside.