JPS6345085Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a small portable radio device, and particularly to its antenna mounting and connection structure.

[Prior art]

In recent years, small portable radio devices have become smaller, lighter, and thinner due to the adoption of ICs, LSIs, etc., and the question of how to improve their sensitivity performance has become an issue.

As shown in the first and second figures, the antenna mounting/connection structure of a conventional small portable radio device is such that a printed circuit board 2 on which a radio circuit is formed is housed in a box 1 made of an insulating hexahedron. A thin plate-shaped loop antenna 4 is disposed along the inner surface of the box body 1 as shown in the first diagram at each of the two antenna connection parts 3a and 3b.
or, as shown in the second figure, both ends of a thin plate-like loop antenna 4 attached to the inner surface of the box 1 are connected with connection terminals 5a and 5b.

However, in such an antenna mounting/connection structure, since the loop antenna 4 is provided within the inner surface of the box 1, the cross-sectional area of the antenna formed by the antenna loop is surrounded by the inner surface of the box 1. This is within the cross-sectional area, and since no more effective antenna cross-sectional area can be obtained, the antenna gain cannot be improved beyond the gain obtained when the antenna cross-sectional area is the cross-sectional area surrounded by the inner surface of the box 1.

[Purpose of invention]

Therefore, the present invention was developed with the aim of improving the antenna gain of a small portable radio device, and the present invention aims to improve the antenna gain by determining the mounting position of the antenna and the connection between the antenna and the radio circuit formed on the printed circuit board. It seeks to provide structure.

[Structure of the idea]

As shown in FIGS. 3 to 7, the present invention achieves the above object by attaching a thin plate-like loop antenna 4 to the outer surface of a box 1 made of an insulating hexahedron with an opening on one side, and a wireless antenna inside a lid 6. Printed circuit board 2 with circuit formed
One end of the printed circuit board 2 is fixed, and two antenna connection parts 3 of the wireless circuit are connected to the end surface of the printed circuit board 2 on the side opposite to the lid.
Two connection terminals 7a ₁ and 7 connected to a and 3b
b ₁ , 7a ₂ , 7b ₂ on both end surfaces 4 of the loop antenna 4
a, 4b, the printed circuit board 2 is inserted into the box 1, and the lid 6 is connected to the open end 1 on one side of the box 1.
a, and both end surfaces 4a, 4b of the loop antenna 4 and the two connecting terminals 7a ₁ ,
7b ₁ , 7a ₂ , and 7b ₂ are connected by removable connection means 8, respectively.

〔Example〕

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

<Configuration of the first embodiment> Fig. 3a is a front view of the first embodiment of the present invention;
Figure b is a side view, Figure 3 c is a back view, Figure 3 d is a bottom view, Figures 4 a and b.
3 is a partially exploded perspective view of the first embodiment shown in FIG.
6 is a sectional view showing the detached state of the antenna connection portion of FIG. 5.

In Figures 3 to 6, 1 is a hexahedral box made of an insulator such as plastic with an opening on one side, and 4 is attached to the outer surface of the box 1 on three sides, and is applied by vapor deposition, etc. The loop antenna is a thin plate-like loop antenna, and both end surfaces 4a and 4b are attached to the outer surface of the box body 1 on the side opposite to the opening. The surface of the loop antenna 4 is insulated except for its end surfaces 4a and 4b. The insulation treatment can be performed by applying an insulating film to the surface of the loop antenna by chemical treatment or pasting an insulating sheet.

6 is a lid, and 2 is a printed circuit board with one end fixed inside the lid 6, on the surface of which a wireless circuit is formed. 7a ₁ and 7b ₁ are both end surfaces 4 of the loop antenna 4 on the opposite end of the printed circuit board 2 to the cover body.
two connection terminals provided opposite a and 4b,
In this first embodiment, the fixing fitting has a female thread,
They are respectively connected to two antenna connections 3a and 3b of the radio circuit.

The lid 6 is fitted into the open end 1a of the box 1 with the printed circuit board 2 inserted into the box 1, and is detachably attached using bolts or the like.

Reference numerals 9a and 9b are male threads of screws, bolts, etc., which are respectively attached to both end surfaces 4a and 4b of the loop antenna 4 through the box body 1, and are screwed into the female threads of the fixing fittings 7a ₁ and 7b ₁ . These male screws 9a, 9b and fixing fittings 7a ₁ , 7b ₁ constitute a removable connection means 8, which connects both end surfaces 4a, 4b and 2 of the loop antenna 4.
The two fixing fittings 7a ₁ and 7b ₁ each have male threads 9
They are removably connected by a and 9b.

<Operation of the first embodiment> The operation will be explained below. The lid 6 on which the printed circuit board 2 shown in FIG. 4 a is fixed is attached to the open end 1 a on one side of the box 1 shown in FIG. Metal fittings 7a ₁ ,
_7b1 is made to face both end surfaces 4a and 4b of the loop antenna 4. Then, by screwing the male screws 9a, 9b into the fixing metal fittings 7a ₁ , 7b ₁ and tightening them, both end surfaces 4a, 4b of the loop antenna 4 are fixed as shown in FIG.
The two antenna connecting portions 3a and 3b of the wireless circuit of the printed circuit board 2 can be connected by male screws 9a and 9b and fixing fittings 7a ₁ and 7b ₁ , respectively.

In addition, by performing the reverse procedure to the above, both end surfaces 4a and 4b of the loop antenna 4 and the two antenna connecting parts 3a and 3b are disconnected, and the lid body 6 to which the printed circuit board 2 is fixed is removed from the box body 1. Can be removed.

<Configuration of Second Embodiment> FIG. 7 shows a sectional view of the second embodiment corresponding to FIG. 5.

This second embodiment is similar to the male screw 9a of the first embodiment,
9b and the fixing metal fittings 7a ₁ and 7b ₁ .
a, 4b and the two antenna connection parts 3a, 3b of the wireless circuit of the printed circuit board 2 using springs 10.
This is a case in which connection means 8 is used which can be detached by connecting contacts 7a, 10b and contacts 7a ₂ and 7b ₂ .

In the case shown in FIG. 7, leaf springs 10a and 10b are connected to both end surfaces 4a and 4b of the loop antenna 4 through the box body 1, respectively, and these leaf springs 10
The plate-shaped contacts 7a ₂ and 7b ₂ that are in contact with the plate springs 10a and 10b are respectively connected to the two antenna connection parts 3a and 3b of the wireless circuit of the printed circuit board 2. Contactor 7a ₂ , 7
It is also possible to have a configuration in which b _{and 2} are replaced.

<Operation of the second embodiment> Two antenna connection parts 3 between both end surfaces 4a and 4b of the loop antenna 4 and the wireless circuit of the printed circuit board 2
a, 3b are connected to and disconnected from the plate springs 10a, 10b and the plate contactor 7 when the lid body 6 is attached to and detached from the box body 1.
This is performed by bringing a ₂ and 7b ₂ into contact with each other and separating them, and it can be performed more easily than in the first embodiment.

Note that the removable connection means 8 in the present invention includes one end surface portion of the loop antenna 4, for example, 4a.
The male screw 9a and the fixing fitting 7a ₁ are used to connect and disconnect one antenna connecting portion 3a of the loop antenna 4 and the other antenna connecting portion 3b of the wireless circuit. It is also possible to adopt a configuration in which this is performed using the spring 10b and the contactor _7b2 .

[Effect of idea]

As described above, according to the present invention, since the thin plate loop antenna 4 is attached to the outer surface of the box 1, the cross-sectional area of the antenna formed by the antenna loop is smaller than that of the conventional inner surface of the box 1. The cross-sectional area surrounded by can be expanded to the cross-sectional area surrounded by the outer surface of box 1,
The antenna gain can be improved more than before. For example, in the case of a small portable radio receiver, receiving sensitivity can be increased by improving antenna gain.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are cross-sectional views showing two conventional examples.
FIG. 3a is a front view of the first embodiment of the present invention, FIG. 3b is a side view thereof, and FIG. 3c is a rear view thereof.
FIG. 3d is a bottom view of the same, FIGS. 4a and 4b are perspective views of the first embodiment shown in FIG. 3 partially exploded into a cover body on which a printed circuit board is attached and a box body into which the printed circuit board is inserted, and FIG.
FIG. 6 is a cross-sectional view showing the state in which the antenna connection part in FIG. 5 is removed, and FIG. 7 is a cross-sectional view of the second embodiment corresponding to FIG. 5. 1: Box body, 1a: One-side opening end, 2: Printed circuit board, 3a, 2b: Antenna connection part, 4
...Loop antenna, 4a, 4b...both end surfaces,
Reference Signs 6: Cover body, _7a1 , _7b1 : Fixing metal fittings (connection terminals), _7a2 , _7b2 : (plate-shaped) contacts (connection terminals), 8: Removable connection means, 9a, 9b...
...male screw, 10a, 10b...(leaf) spring.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) One end of a printed circuit board with a thin loop antenna attached to the outside of a box made of an insulating hexahedron with an opening on one side, and a wireless circuit formed on the inside of the lid. is fixed, two connection terminals connected to the two antenna connection parts of the wireless circuit are provided on the end surface of the printed circuit board opposite to the lid, facing both end surfaces of the loop antenna, and the printed circuit board is inserted into the box. A small portable radio device configured by attaching a lid detachably to an open end of one side of a box, and connecting both end surfaces of a loop antenna and two connection terminals with detachable connection means. Antenna mounting/connection structure. (2) The removable connection means is a utility model registration in which male screws are attached to both end faces of the loop antenna by penetrating through the box body, and the two connection terminals are configured as fixing fittings into which these male screws are screwed together. An antenna mounting/connection structure for a small portable radio device according to claim 1. (3) The removable connection means connects springs or contacts to both end faces of the loop antenna by penetrating the box, and configures the two connection terminals as contacts or springs that come into contact with these springs or contacts. An antenna mounting/connection structure for a small portable wireless device according to claim 1 of the registered utility model. (4) The removable connection means has a male screw that penetrates the box and is attached to one end face of the loop antenna, and one of the connection terminals is used as a fixing fitting into which the male screw is screwed. A small mobile phone according to claim 1, which is a registered utility model, wherein a spring or a contact is connected to the end face portion through the box, and the other connecting terminal is configured as a contact or a spring that comes into contact with the spring or contact. Radio antenna installation and connection structure.