JP2000151241A - Radio equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio equipment whose built-in antenna functions satisfactorily and whose repair, etc., is facilitated. SOLUTION: A bent part 16 is held with a prescribed distance placed from a shield case 13 because the pawl-shaped part 22 of a holder 21 fixes the bent part of a built-in antenna 14 and the holder 21 is also fittable to the shield case 13 by a projecting part 24 and a through hole 25. It is also possible to make the bent part 16 go away from the shield case 13 by turning the antenna 14 together with the holder 21 in the circumferential direction of a coil-shaped part 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio having a built-in antenna having a coil-shaped portion and a bent portion.

[0002]

2. Description of the Related Art A portable telephone radio or the like has a built-in antenna in a cabinet in addition to an extendable whip antenna. Also, inside the radio equipment cabinet, one end of the built-in antenna is electrically connected and a wiring board on which various other electric parts are also mounted, and radio waves radiating from the outside world and radio waves radiating from the whip antenna And a shield case which is a conductor and covers one surface of the wiring board in order to prevent the electrical components on the wiring board from being affected.

[0003] In order for the built-in antenna to have desired characteristics, it is necessary that the built-in antenna has a predetermined length. However, in a wireless device having a limited space in the cabinet, the built-in coil-shaped antenna is moved in the axial direction. Only can not be longer. For this reason, the built-in antenna extends in a direction perpendicular to the axial direction of the coil-shaped portion from the middle thereof, and is bent in the vertical plane and spread in the vertical plane. That is, the built-in antenna in this case has a coil-shaped portion and a bent portion.

[0004] One end of the built-in antenna is electrically connected to the wiring board. However, since one surface of the wiring board is covered with a shield case, at least a part of the bent portion of the built-in antenna is shielded. I have to position it on the case. However, since the shield case is a conductor, the characteristics of the built-in antenna deteriorate unless the bent portion of the built-in antenna is kept at a predetermined distance from the shield case. For this reason, it has been considered that a dielectric holder is provided integrally with the shield case, and the bent portion of the built-in antenna is fixed by the holder.

On the other hand, as a structure for electrically connecting one end of the built-in antenna to the wiring board, there is a structure in which one end of the built-in antenna is soldered to the wiring board, or a structure using the elastic restoring force of the built-in antenna. For example, a structure for elastically contacting a portion with a wiring board has been considered.

[0006]

However, when the bent portion of the built-in antenna is fixed by a holder integral with the shield case and one end of the built-in antenna is soldered to a wiring board, the shield case is repaired or the like. Even when removing the wiring board to expose the wiring board, the shield case cannot be removed from the wiring board unless the soldered portion is removed and the built-in antenna is removed from the wiring board. However, since the work of removing the soldered portion and removing the built-in antenna from the wiring board is complicated, repair and the like cannot be easily performed with the wireless device having this structure.

On the other hand, even if the bent portion of the built-in antenna is fixed by a holder integral with the shield case, one end thereof is brought into elastic contact with the wiring board by utilizing the elastic restoring force of the built-in antenna. In this case, the shield case can be removed from the wiring board together with the built-in antenna, so that repair and the like can be easily performed. However, if only the contact using the elastic restoring force is used, the contact is unstable, and a contact failure may occur due to oxidation of the contact portion. Therefore, in the wireless device having this structure, it is difficult to say that the built-in antenna is electrically connected to the wiring board satisfactorily, and the built-in antenna does not always function well.

Therefore, according to the invention of the present application, the built-in antenna functions well, and the shield case can be removed from the wiring board without removing the built-in antenna from the wiring board to expose the wiring board. It is an object of the present invention to provide a radio which can be easily operated.

[0009]

In the radio device according to the present invention, the holder is separate from the shield case, but the fixing portion of the holder fixes the bent portion of the built-in antenna and the holder is the fitting portion. Therefore, when the shield case and the holder are fitted together, the bent portion of the built-in antenna is held at a predetermined distance from the shield case. In addition, since the tip of the coil-shaped portion of the built-in antenna is fixed to the wiring board, the built-in antenna is electrically connected to the wiring board in a good condition.

In addition, since the holder is separate from the shield case and is fixed to the wiring board, not at the tip of the bent portion of the internal antenna, but at the tip of the coil-shaped portion, the coil-shaped portion is fixed. By rotating the built-in antenna together with the holder in the circumferential direction, the bent portion of the built-in antenna can be retracted from above the shield case.

In the wireless device according to the second aspect, since the holder has the locking portion for locking to the edge of the wiring board,
The holder can be locked to the edge of the wiring board by the locking portion while the built-in antenna is rotated together with the holder in the circumferential direction of the coil-shaped portion. Therefore, even when the built-in antenna is rotated, it is possible to prevent the bent portion of the built-in antenna from returning to the shield case due to the elastic restoring force of the coil-shaped portion.

In the wireless device according to the third aspect, the diameter of the coil-shaped portion of the built-in antenna is reduced, and the holder faces the edge of the wiring board when the built-in antenna is rotated in the circumferential direction of the coil-shaped portion. Is provided with a locking portion. For this reason, the stress generated in the coil-shaped portion is smaller than when the built-in antenna is rotated in the circumferential direction of the coil-shaped portion where the diameter of the coil-shaped portion increases, and the holder is held by the locking portion for a long time. Even if it is locked to the edge of the wiring board, the stress generated in the coil-shaped portion of the built-in antenna hardly exceeds the elastic limit.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention applied to a portable telephone radio will be described below with reference to FIGS. In the portable telephone radio set 11 of the present embodiment, a wiring board 12 is accommodated in a cabinet (not shown), and a shield case 13 formed by depositing metal on the surface of a resin case is provided on one surface of the wiring board 12. Is covered. The built-in antenna 1 is provided on the shield case 13 side of the wiring board 12.
4, and the built-in antenna 14 has a coil-shaped portion 15 and a bent portion 16.

The tip portion 17 of the coil-shaped portion 15 is soldered to the wiring board 12, and when the wiring board 12 is viewed vertically from the shield case 13 side, the coil-shaped portion 15 is bent after being wound clockwise. It is connected to the section 16. A resin-made holder 21 is provided in the cabinet, and a claw-shaped portion 22 having a claw-shaped cross section and a thin columnar-shaped portion 23 are integrally formed on one surface of the holder 21.

One corner of the claw 22 and the column 2
The bent portion 16 is bent along one side of the holder 21 so that the bent portion 16 is spread on one surface of the holder 21. The bent portion 16 is fixed to one surface of the holder 21 by fitting with the claw-shaped portion 22. A convex portion 24 is integrally formed on a surface of the holder 21 that is different from a surface on which the claw-shaped portion 22 and the column-shaped portion 23 are formed, and a circular through-hole 25 is provided in the convex portion 24. I have.

The holder 21 has a protrusion 2 adjacent to the protrusion 24.
The protrusion 26 smaller than 4 is also integrally formed. In the shield case 13, a claw-shaped portion 27 that fits with the projection 24 and a hemispherical portion 28 that fits with the through hole 25 are integrally formed. In such a normal assembled state of the portable telephone radio set 11, as shown in FIG.
4 and the through hole 25 and the claw-shaped portion 27 and the hemispherical-shaped portion 28, the holder 21 is fitted to the shield case 13. In this fitted state, the bent portion 16 is held at a predetermined distance from the shield case 13. Have been.

On the other hand, at the time of repair or the like, as shown in FIG. 2, the fitting of the projection 24 and the through hole 25 with the claw-shaped portion 27 and the hemispherical-shaped portion 28 is released, and the shield case 13 is removed. The built-in antenna 14 is rotated together with the holder 21 in the clockwise direction when the wiring board 12 is viewed vertically from the side, and the holder 21 is locked to the edge of the wiring board 12 by the protrusion 26.

When the built-in antenna 14 is rotated, an elastic restoring force is generated in the built-in antenna 14, but the holder 21 and the bent portion 16 do not return to the shield case 13 due to the engagement by the projection 26. Therefore, the bent portion 1
Since the state in which 6 is retracted from above the shield case 13 is maintained, the shield case 13 can be removed from the wiring board 12 to expose the wiring board 12 in this state, and repair and the like can be performed.

When the repair or the like is completed, the engagement between the convex portion 26 and the wiring board 12 is released, and the holder 21 and the bent portion 16 are returned onto the shield case 13 by the elastic restoring force of the built-in antenna 14, and the convex portion 24 And by merely fitting the through hole 25 with the claw-shaped portion 27 and the hemispherical-shaped portion 28, respectively,
The mobile phone radio 11 returns to the normal assembled state. That is, since the shield case 13 can be removed from the wiring board 12 without exposing the built-in antenna 14 from the wiring board 12 to expose the wiring board 12, repair and the like can be easily performed.

The direction following the bent portion 16 after the coil-shaped portion 15 is wound, the direction in which the built-in antenna 14 is rotated together with the holder 21, and the direction in which the wiring board 12 is viewed vertically from the case 13 Clockwise and equal to each other. Therefore, when the holder 21 and the built-in antenna 14 are rotated, the diameter of the coil-shaped portion 15 is reduced,
In the rotation in this direction, the stress generated in the coil-shaped portion 15 is small.

Further, a projection 26 is provided at a position where the holder 21 faces the edge of the wiring board 12 when the built-in antenna 14 rotated in this direction is returned. For this reason, even if the holder 21 is locked to the wiring board 12 by the convex portion 26 for a long time, the stress generated in the coil-shaped portion 15 hardly exceeds the elastic limit. Is not easily damaged. Therefore, both the direction in which the coil-shaped portion 15 is connected to the bent portion 16 after being wound and the direction in which the built-in antenna 14 is rotated together with the holder 21,
All may be in the counterclockwise direction when the wiring board 12 is viewed vertically from the side.

If the stress generated in the coil-shaped portion 15 does not exceed the elastic limit, the direction in which the coil-shaped portion 15 continues to the bent portion 16 after being wound and the holder 21
And the direction in which the built-in antenna 14 is rotated is the opposite direction, and in this state, the holder 21 is
The protrusion 26 may be provided at a position on the holder 21 that can be locked to the edge of the holder 21.

In the above embodiment, the portable telephone radio 1
Although the invention of the present application is applied to FIG. 1, the invention of the present application can be applied to a wireless device other than a mobile phone wireless device.

[0024]

According to the first aspect of the present invention, when the shield case and the holder are fitted together, the bent portion of the built-in antenna is held at a predetermined distance from the shield case, and the built-in antenna is mounted on the wiring board. The built-in antenna works well because it is electrically well connected. Moreover,
By rotating the built-in antenna together with the holder in the circumferential direction of the coil shape part, the bent part of the built-in antenna can be retracted from above the shield case, so the shield case can be removed from the wiring board without removing the built-in antenna from the wiring board Thus, the wiring board can be exposed, and repair and the like can be easily performed.

In the wireless device according to the second aspect, even if the built-in antenna is rotated, the bent portion of the built-in antenna can be prevented from returning to the shield case due to the elastic restoring force of the coil-shaped portion. Etc. can be performed more easily.

In the wireless device according to the third aspect, even if the holder is locked to the edge of the wiring board by the locking portion for a long time, the stress generated in the coil-shaped portion of the built-in antenna exceeds the elastic limit. It is difficult to damage the built-in antenna even if repairs are performed.

[Brief description of the drawings]

FIG. 1 shows a main part of an embodiment of the present invention in an assembled state, in which (a) is a front view and (b) is a side view.

FIG. 2 is a front view of a main part of the embodiment in a state where a built-in antenna is rotated.

[Explanation of symbols]

11: mobile phone radio (radio), 12: wiring board, 1
3 ... Shield case, 14 ... Built-in antenna, 15 ... Coil shape part, 16 ... Bend part, 17 ... Tip part, 21 ... Holder, 22 ... Claw shape part (fixed part), 24 ... Protrusion part (fitting part), 25: through hole (fitting part), 26: convex part (locking part)

Claims (3)

[Claims] 1. A built-in antenna having a coil-shaped portion and a bent portion, a wiring board to which a tip end of the coil-shaped portion is fixed, and a shield case covering one surface of the wiring board. And a holder having a fixing portion for fixing the bent portion and a fitting portion for fitting to the shield case. 2. The wireless device according to claim 1, wherein the holder has a locking portion for locking to an edge of the wiring board. 3. The locking portion is provided at a position where the holder faces the edge when the built-in antenna is rotated in the circumferential direction of the coil-shaped portion and the diameter of the coil-shaped portion is reduced. The wireless device according to claim 2.