JPH01190033A - Antenna connection method to radio equipment - Google Patents

Abstract

PURPOSE:To attain simple loading/unloading of an antenna and to surely prevent the invasion of water content or dust or the like into a case by coupling the inside and the outside of the case in terms of induction through the use of an induction coil. CONSTITUTION:A mount mark representing a mount position to mount an adaptor disk 16 with an antenna 15 mounted thereto is marked on the outer face of the case 11 opposite to a position where a high frequency tuning circuit 13 in the inner face of the case 11 is arranged closely. Then the adaptor 16 with the antenna 15 connected hereto is mounted attachably and detachably to the mount marker position. An induction coil 17 wound concentrically is imbedded in the inside of the adaptor 16 and the one terminal of the antenna 15 is connected to the coil. Thus, the operator mounts the adaptor 16 with the antenna 15 connected thereto to the mount marker position of the ease 11 by using an adhesive tape such as double-side bonding tape.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a small portable radio device in which an external antenna is connected to a main body of the radio device disposed inside a case without using a connection terminal. Regarding antenna connection method.

[Conventional technology]

For example, a small IN band type radio set that can fit into an operator's clothing pocket is constructed as shown in FIG. 4, for example. A mmless main body 2 is disposed in a box-shaped case l, and the signal output from the radio main body 2 is tuned to a predetermined high frequency by a tuning circuit 3. The signal is wirelessly output from an external antenna 5 made of a Ts1 wire via an antenna terminal 4 attached to the antenna. Conversely, from the high frequency signal received by the antenna 5, the necessary frequency components are extracted by the tuning circuit 3 and input to the radio main body 2.

The fifth hll is a schematic cross-sectional view showing the blank 11a shown in FIG. 4. A high frequency signal taken out from the midpoint of the tuning coil 3a of the tuning circuit 3 is applied to the antenna terminal 4 attached to the case 1 via the coupling capacitor 6. This antenna terminal 4 is fixed to a through hole drilled in the side wall of the case 1, and a string-like antenna 5 made of a limb covering wire is connected to the outside of this antenna terminal 4 via, for example, a plug 7. There is.

Note that the antenna 5 may be directly soldered to the antenna terminal 4 in some cases.

[Problems to be Solved by the Invention] However, the following problems still exist in the wireless devices configured as shown in FIGS. 4 and 5. That is, as shown in the cross-sectional view of FIG.
It is necessary to attach the antenna terminal 4 to the case 1 in order to connect the antenna terminal 4 to the case 1.

In order to attach this antenna terminal 4 to the case 1, it is necessary to make a through hole in the case 1.

On the other hand, since the operator carries this small portable radio device by storing it in a pocket of clothing, the environment in which it is used changes significantly. As a result, if the antenna terminal 4 is used under humid conditions, there is a concern that moisture may enter the case from the mounting portion of the antenna terminal 4.

Furthermore, if the device is used in a dusty environment, there is a concern that the dust may enter the case 1 through the mounting area of the antenna terminal 4.

The present invention has been made in view of these circumstances,
By inductively coupling the inside of the case and the outside of the case using an induction coil, the radio body inside the case and the antenna outside the case can be electrically connected without adding 19 etc. processing to the case, making it easy to connect. To provide a method for connecting an antenna to a non-UA device, which allows the antenna to be removed and which can surely prevent moisture, dust, etc. from entering the case.

[Means for Solving the Problems] The present invention provides a method for connecting an antenna to a radio device in which an antenna disposed outside the case is connected to a radio device body disposed inside the case. A high-frequency tuning coil in the input/output stage for the antenna is placed close to the inner surface of the case, one end of the antenna is connected to the induction coil built in the adapter, and the adapter containing this induction coil is connected to the adapter with the tuning coil placed close to it. The antenna is detachably attached to the outer surface of the case opposite to the inner surface of the case, and the main body of the radio and the antenna are connected using inductive coupling between the tuning coil and the induction coil.

[Function] According to the method of connecting the antenna to the radio device as described in 4.1 above, the high frequency tuning coil in the input/output stage for the antenna of the main body of the radio device inside the case is placed close to the inner surface of the case. . Then, when an adapter containing a built-in induction coil to which one end of the antenna is connected is attached to the outer surface of the case opposite to the inner surface of the case where the tuning coil is disposed in close proximity, using double-sided adhesive tape, etc., the induction coil of the adapter and the tuning coil can be attached. are inductively coupled through the case wall.

Thus, the main body of the radio inside the case and the antenna outside the case can be electrically connected without adding anything to the case.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a radio device that employs the method of connecting an antenna to a radio device according to an embodiment. A radio main body 12 is disposed within a case 11 formed of a non-conductive material such as plastic into a box shape, and a signal output from the radio main body 12 is tuned to a predetermined high frequency by a high frequency tuning circuit 13. is synchronized with.

Further, this high frequency tuning circuit 13 is arranged close to the side wall of the case 11. For example, printed internal antenna wires 14 are wired at equal intervals on the earthen wall inside the case 11. One end of this internal antenna wire 14 is connected to the midpoint of the tuning coil of the high frequency tuning circuit 13 via an engagement capacitor 19. Case 1 facing the position where the high frequency tuning circuit 13 is arranged close to the inner surface of the case 11
An attachment marker is drawn on the outer surface of the antenna 1 to indicate the attachment position for attaching the disk-shaped adapter 16 to which the antenna 15 is attached. Then, the adapter 16 to which the antenna 15 is connected is freely attached to the attachment marker position.

This disk-shaped adapter 16 is made of, for example, resin, and as shown in FIG. 2, a concentrically wound induction coil 17 is embedded inside the adapter 16. One end of the antenna 15 is connected to the induction coil 17. For example, double-sided adhesive tape 18 is attached to one side of the disc-shaped adapter 16, and the adhesive force of this double-sided adhesive tape 18 allows the adapter 16 to be attached to the attachment marker position drawn on the outer surface of the case 11.

FIG. 3 is a schematic cross-sectional view showing the radio device shown in FIG. 1.

[Radio device body] High frequency tuning circuit 1 into which signals are input from 2
The third tuning coil 13a is arranged close to the inner surface of the case 11. The mounting marker is attached to this tuning coil 1.
3a is drawn on the outer surface of the case 11 opposite to the inner surface of the case 11 arranged in close proximity. Further, the midpoint of the tuning coil 13a is connected to the internal antenna 1 via the coupling capacitor 19.
Connected to 4.

With such a radio device and antenna, an operator first attaches the adapter 16 to which the antenna 15 is connected to the attachment marker position of the case 11 using, for example, double-sided adhesive tape 18, as shown in FIG. In this state, No. 12 outputted from the main body 12 of the radio is simultaneously expressed at a predetermined high frequency by the high frequency tuning circuit 13. In this case, a No. 12 high frequency current to be wirelessly output flows through the tuning coil 13a of the high frequency tuning circuit 13, generating a high frequency magnetic field around the tuning coil 13a. This high frequency magnetic field causes a high frequency induced current to be generated in the induction coil 17 of the adapter 16 attached to the outer surface of the case 11 made of a non-conductive material. That is, the tuning coil 13a
and the induction coil 17 are inductively coupled.

Therefore, the high frequency signal included in the high frequency wave 7u generated in the induction coil 17 is wirelessly outputted via the antenna 15.

Conversely, the high frequency signal received by the antenna 15 is manually input to the tuning coil 13a of the high frequency tuning circuit 13 via the induction coil 16. Then, among these high frequencies, frequency components required by the stomach circuit 13 are extracted and input to the radio main body 2.

Note that when using this radio device near the other party's radio device, remove the adapter 16 from the case 11 and connect it to the other party's transceiver using only the internal antenna 14 provided inside the case 1. It becomes possible to send and receive data wirelessly.

As described above, according to the method for connecting an antenna to a radio device of the present invention, the tuning coil 13a and the induction coil 17 can be connected to each other by simply attaching the adapter 16 to the mounting marker position of the case 11 using, for example, double-sided adhesive tape 18. be combined.

Therefore, the radio main body 12 disposed inside the case 11
and the antenna 15 disposed outside the case 11 can be electrically connected. As a result, there is no need to drill a through hole in the case 11 to attach the antenna terminal, so even if it is used in a bad environment, it is possible to reliably prevent moisture and dust from entering the case 11. Ru.

Further, the adapter 16 can be easily attached to and detached from the case 11.

[Effects of the Invention] As explained above, according to the method for connecting an antenna to a radio device of the present invention, the inside of the case and the outside of the case are inductively coupled using an induction coil. Therefore, the radio inside the case and the antenna outside the case can be electrically connected without any modification to the case, the antenna can be easily attached and detached, and moisture, dust, etc. can be prevented from entering the case. can be reliably prevented.

[Brief explanation of the drawing]

1 to 3 show a method of connecting an antenna to a wireless device according to the present invention, and FIG. 1 is a perspective view showing a wireless device;
FIG. 2 is a diagram showing an antenna and an adapter, FIG. 3 is a schematic cross-sectional view of a radio device, and FIGS. 4 and 5 are diagrams showing a conventional connection method. ]1...Case, 12...Radio device body, 13...
High frequency tuning circuit, 13a... Tuning coil, 14...
Internal antenna, 15... Antenna, 16... Adapter, 17... Induction coil, 18... Double-sided bone tape. Applicant's agent Patent attorney Takehiko Suzue No. 2 Figure No. 3 Cause

Claims (1)

[Claims] In a method for connecting an antenna to a radio device in which an antenna disposed outside the case is connected to a radio device body disposed inside the case, a high frequency tuning coil in an input/output stage for the antenna of the radio device body is connected to the radio device body disposed in the case. The antenna is placed close to the inner surface of the case, one end of the antenna is connected to an induction coil built in the adapter, and the adapter containing the induction coil is placed on the outer surface of the case opposite to the inner surface of the case where the tuning coil is placed close to the adapter. 1. A method for connecting an antenna to a radio device, comprising detachably attaching the antenna and connecting the main body of the radio device and the antenna using inductive coupling between the tuning coil and the induction coil.