JP3297908B2 - Equipment for electromagnetic wave inspection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave inspection instrument used for inspecting a reception state of a radio device represented by, for example, a portable telephone.

[0002]

2. Description of the Related Art With the recent spread of portable telephones, the performance and miniaturization of portable telephones are rapidly progressing, and recently, those capable of accessing the Internet have been commercialized. Mobile phones use electromagnetic waves (1.5 GHz or 800 M
Hz) is transmitted and received, and the sensitivity is affected by the strength of the electromagnetic wave reception (hereinafter referred to as radio wave reception). If the strength of the received radio wave is weak, the call is interrupted or noise enters. Or become difficult. For this reason, a mobile phone is generally provided with a display unit for displaying the radio wave reception intensity in three stages, and the user can check the radio wave reception state at the current location by looking at the display unit. .

[0003] Even if such a display function of the radio wave reception intensity is added, it is possible to understand that when the reception intensity is low (for example, when the reception level is the lowest), the call is interrupted or becomes difficult. There are not users. For this reason, even though the mobile phone is normal, a complaint may be sent to a store or a manufacturer, etc., regarding the failure of the mobile phone, and it is desired to provide an inspection device that can deal with such a complaint. It is rare.

In order to meet such a demand, an electromagnetic wave shielding case is used, and a test antenna is provided in the case. When a mobile phone is set in the case, the antenna of the mobile phone and the test antenna are opposed to each other. .
Then, a format in which the resonance frequency of the test antenna is set to a value higher than the operating frequency of the mobile phone and the transmission / reception performance is measured has already been proposed (Japanese Patent Laid-Open No. Hei 7-2641).
No. 47).

[0005]

However, an object of the above-mentioned prior art is to reduce the size of a large shield test chamber (anechoic chamber). In other words, the inside of the case is always completely shut off during the inspection of radio waves from outside (peripheral base stations and the like). In addition, the operation of the mobile phone is inspected by transmitting and receiving between the test antenna and the antenna of the mobile phone which are respectively provided inside the case. The test antenna does not catch external radio waves and incorporate it into the case. This conventional example is nothing less than a premise that a radio wave generator (coil and capacitor) is separately incorporated in a part of the case. Therefore, since the size of the mobile phone can be reduced, it can be installed at a service window of a trader, and it is possible to judge the quality of the mobile phone itself. However, for the user, there is no difference from the judgment in the shield test room, the inspection device itself is a black box, it is difficult to understand with your own eyes whether the mobile phone was really bad,
There are still problems in solving real problems.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electromagnetic wave inspection device which can be easily carried and which can easily check the reception status of a radio device such as a portable telephone. Another object of the invention is to allow the user himself to see and convince himself by changing the intensity level of the electromagnetic waves in front of the user, preferably from a shielded state to a complete reception level. It is in.

[0007]

As shown in FIG. 1, an electromagnetic wave inspection instrument according to the present invention has an electromagnetic wave shielding case 1 capable of accommodating a radio device (hereinafter referred to as a portable telephone P).
And an electromagnetic wave introducing means for introducing an electromagnetic wave into the case 1 by a predetermined amount. The electromagnetic wave shield case 1 has a display unit D of a mobile phone P housed therein.
A viewing window 30 is provided for visually recognizing from outside.
Then, the electromagnetic wave introducing means provides an opening 31 in the electromagnetic wave shielding case 1, provides an opening / closing lid 32 movably with respect to the opening 31, and operates the opening / closing lid 32 to open the opening 31.
The amount of electromagnetic waves introduced can be adjusted by changing the amount of opening.

As an electromagnetic wave introducing means, an external antenna 6 is provided on the electromagnetic wave shield case 1 in an insulated state from the case 1 and protrudes out of the case so as to extend and contract.
The amount of electromagnetic waves introduced may be adjusted by expanding and contracting the external antenna 6. In that case, as shown in FIG. 8, a conductive coil body 8 wound in a cylindrical shape as shown in FIG. 8 is provided, and the coil body 8 can be externally fitted to the antenna rod of the mobile phone P in the electromagnetic wave shielding case 1. In this way, it is desired that the base end of the external antenna 6 facing the inside of the electromagnetic wave shielding case 1 can be connected to the coil body 8.

The electromagnetic wave shield case 1 is provided with an earphone jack 7 connected to the mobile phone P in order to monitor the reception state of the mobile phone P, and the plug of the earphone jack 7 is connected to the electromagnetic wave shield case. One faces outside.

[0010]

In use, as shown in FIG. 1, the electromagnetic wave shield case 1 is opened, the portable telephone P is turned on and accommodated therein, and the case 1 is closed. Specifically, the opening / closing lid 32 of a sliding type is opened as shown in FIGS. 3 and 7, and the opening 31 is set to the maximum opening amount.
Next, while operating the opening / closing lid 32 in the direction of gradually closing, the display unit D of the mobile phone P is seen through the viewing window 30 from the outside, and the reception level display of the display unit D is smoothly changed from 3 to 1. Check if it has changed. In checking the reception level, the level display of the display unit D may be changed from 1 to 3 while gradually opening the opening / closing lid 32 from the fully closed position. In addition,
When the opening 31 is completely closed by the opening / closing lid 32, it is preferable to completely block external electromagnetic waves from entering the electromagnetic wave shielding case 1, but the electromagnetic wave shielding case 1 itself is equivalent to a so-called anechoic chamber. Such electromagnetic shielding performance is not required.

Alternatively, with the opening 31 kept closed by the opening / closing lid 32, the external antenna 6 is extended so as to protrude to the maximum as shown in FIG. 9, and the external antenna 6 is gradually retracted so as to contract it. Alternatively, the user may look at the display unit D of the mobile phone P through the viewing window 30 and check whether the reception level display smoothly changes from 3 to 1. Of course, the level may be inspected while pulling out the external antenna 6 from the contracted state.
Also in this case, since the external antenna 6 is provided in an insulated state with respect to the electromagnetic wave shielding case 1, the level inspection can be performed. However, in order to perform the operation more reliably, the auxiliary coil body 8 is externally fitted to the antenna rod of the mobile phone P in the electromagnetic wave shielding case 1 as shown in FIG. Insert the lead wire 6
b and the clip 6a are connected to the coil body 8. Thereafter, the reception level can be checked in the same manner as described above by operating the external antenna 6 to expand and contract.

[0012]

According to the present invention, the electromagnetic wave shielding case 1 can be easily carried in a portable attach case type. Moreover, whether the operator opens and closes the opening / closing lid 32,
By expanding or contracting the external antenna 6 or gradually changing the state in which the external electromagnetic wave is blocked by such a simple operation to a state in which the electromagnetic wave is allowed to enter the inside of the case, the appearance of the electromagnetic wave disturbance can be reduced. Since the inspection can be performed by viewing the display D of the internal wireless device P through the viewing window 30, anyone can easily perform the inspection. Moreover, the user himself can visually check the inspection status through the viewing window 30 in front of his / her eyes. In addition, by using the earphone jack 7 provided in the electromagnetic wave shield case 1, the inspection status can be confirmed by ear. Therefore, there is an advantage that a complaint based on a user's misunderstanding can be dealt with with the user's consent.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The instrument for electromagnetic wave inspection according to the present invention is intended for a portable telephone as a typical example of a wireless device. The electromagnetic wave shielding case 1 has an attache case type including a case body 2 made of an aluminum plate and a lid 3, and the mobile phone P is housed in the case body 2. The case body 2 and the lid 3 are connected by a hinge 4 so as to be openable and closable, and the lid 3 can be opened to about 90 degrees or more with respect to the case body 2. The electromagnetic wave shielding case 1 is provided with a slide lock 11 for locking the lid 3 when closed, a handle 12 used for carrying, a gold foot (made of iron) 13, and the like.

As shown in FIG. 5, the casing body 2 and the lid 3 are preferably provided with a packing 5 for electromagnetic wave shielding (for example, a sponge seal covered with a metal mesh) around the entire joint. The packing 5 is mounted on the case body 2 side. More preferably, as shown in FIG. 4, a cushioning material or a radio wave absorber (for example, a conductive foam or synthetic rubber) 1 is provided inside the case body 2 and the lid 3 respectively.
0 is attached.

In FIG. 3, a viewing window 30 is provided on the upper wall of the lid 3 so that the display unit D of the portable telephone P housed inside the electromagnetic wave shielding case 1 can be visually recognized from outside the case. The viewing window 30 is formed by mounting a shield plate 30a for covering an electromagnetic wave by covering a metal plate on a transparent plastic plate such as an acrylic resin or a polycarbonate so as to cover an opening in an upper wall of the lid 3. I have. This shield plate may be made of transparent glass covered with a metal mesh.

The upper wall of the lid 3 is provided with a slit-like opening 31 extending in the left-right direction, and a slide-type opening / closing lid 32 is provided on the upper surface to open and close the opening 31.
Is provided. As shown in FIGS. 3 and 6, the opening / closing lid 32 is formed by a guide formed between a pressing plate 33 provided on a peripheral edge excluding one end (the right end in FIG. 3) of the opening 31 and an upper wall of the lid 3. The opening 31 is completely closed when the opening / closing lid 32 is slidably moved to the end of the guide groove 34 (the left end in FIG. 3). By sliding the opening / closing lid 32 to the opening side from this closed state, the opening amount of the opening 31 can be adjusted arbitrarily (see FIG. 7).

A rod-shaped external antenna 6 is provided at the rear end of the side wall of the lid 3 as shown in FIG. The external antenna 6 penetrates the side wall of the lid 3 while being maintained in an insulated state, and has a base end located inside the case.
A lead wire 6b is connected to the base end of the external antenna 6, and a tip of the lead wire 6b has a crocodile clip 6a.

An earphone jack 7 is provided in the case body 2. The earphone jack 7 is used to monitor the reception state of the mobile phone P as shown in FIG. 1, and a pin jack 7a that can be inserted into an earphone jack (not shown) of the mobile phone P has a curled wiring 7b. Connected through. The earphone jack 7 penetrates the side wall (the left side wall in FIG. 2) of the case main body 2, and the insertion opening faces the outside of the case. The earphone jack 7 and the external antenna 6 are insulated from the case body 2 and the lid 3, respectively, to prevent the diffusion of the electromotive current.

As shown in FIG. 1, the electromagnetic wave shield case 1 has a coil body 8 which is fitted to the antenna rod of the mobile phone P at the time of inspection, and the coil body 8 which receives the coil body 8 and is inside the case body 2 of the mobile phone P. And a mat 9 for positioning at a position as an accessory. The coil body 8 is formed by winding a conductive material into a cylindrical shape.

Next, the method of using the electromagnetic wave inspection instrument will be described. First, the portable telephone P is set in a receivable state, the electromagnetic wave shielding case 1 is opened as shown in FIG. And the mobile phone P
The monitor pin jack 7a is inserted into the earphone jack, and the electromagnetic wave shield case 1 is closed. In addition, a pin jack (not shown) of an earphone for monitoring of an operator is inserted and connected to the earphone jack 7 of the electromagnetic wave shielding case 1.

Subsequently, as shown in FIG. 3, the opening / closing lid 32 is slid to the right to open the opening 31 completely.
As a result, a state where the invasion of the electromagnetic wave into the electromagnetic wave shield case 1 is allowed (a state of the reception level 3) is obtained. From this state, the user slides the opening / closing lid 32 in the closing direction on the left side while gradually observing the display portion D of the mobile phone P through the viewing window 30 of the electromagnetic wave shielding case 1 to gradually close the opening 31. go.

At this time, a call is made from an external telephone to the portable telephone P in the electromagnetic wave shielding case 1 and a telephone call is made. Confirm. Opening / closing lid 3
Set the reception level to reception level 1 with slide 2 and
For example, it is confirmed via a monitor earphone that the call is interrupted or noise is likely to enter. The mobile phone P may be connected in advance to the time signal transmitting station number or the station number of the weather forecast, and it may be confirmed that the communication state gradually changes as the reception level decreases.

Next, another inspection method will be described with reference to FIGS. 8 and 9. First, after the portable telephone P is accommodated in the case main body 2 in the same manner as described above, a spare is placed around the antenna rod of the portable telephone P. Is disposed, and the coil body 8
The external antenna 6 and the coil body 8 are connected by a lead wire 6b. in this case,
While the opening 31 is completely closed with the opening / closing lid 32 and the external antenna 6 is extended, the external antenna 6 is gradually contracted while looking at the display D of the internal mobile phone P through the viewing window 30. The reception intensity displayed on the mobile phone P is changed from the reception level 3 to 1. In addition, by keeping the opening 31 closed by the opening / closing lid 32 without using the spare coil body 8, the external antenna 6 can be moved with respect to the electromagnetic wave shielding case 1 only by expanding / contracting the external antenna 6. If they are installed in an insulated state, the reception level can be inspected in the same manner.

As described above, when the call state at each reception level displayed on the mobile phone P can be confirmed, when a user makes a complaint, the complaint machine is housed in the electromagnetic wave shielding case 1 and the above procedure is performed. By having the user check the call status of the claim machine with his eyes and ears, when the radio wave is weak, the call may be interrupted,
You can be convinced that calls will be difficult.
Moreover, since the electromagnetic wave shield case can be made into an attache case type, it can be easily carried by putting it in your hand, and it can be inspected at any place, not limited to a specific place such as a store,
For example, it is possible to easily and quickly respond to a request for a business trip inspection from a user.

In the above embodiment, as one of the electromagnetic wave introducing means, a structure combining an introduction slit and a slide plate is applied. Alternatively, a type provided with a rotary or swing type opening / closing lid 32 may be applied. As the electromagnetic wave introducing means, in addition to the above structure, for example, a mechanism for adjusting the opening degree of the lid 3 with respect to the case body 2 of the electromagnetic wave shielding case 1 is provided, and the electromagnetic wave inside the electromagnetic wave shielding case 1 is finely adjusted by adjusting the case opening degree. A structure for adjusting the amount of introduction, or an opening / closing lid 32 made of metal mesh is detachably attached to the opening 31 opened in the electromagnetic wave shielding case 1 and the opening / closing lid 32 is sequentially replaced with one having a different mesh size. A structure for adjusting the introduction amount of the electromagnetic wave is exemplified.

Although the earphone is used to monitor the communication state of the portable telephone set P housed in the electromagnetic wave shielding case 1, the present invention is not limited to this. For example, a microphone is arranged in the electromagnetic wave shielding case 1, The microphone output may be monitored outside the case, or the output of the mobile phone P may be input to a computer via a connection cable. Note that the electromagnetic wave inspection instrument of the present invention can also be used when inspecting radio interference caused by medical equipment such as a pacemaker or an instrument of an aircraft. In this case, inspection equipment such as medical equipment and instruments is housed in the electromagnetic wave shielding case 1, and when an electromagnetic wave emitted from a mobile phone or the like is introduced into the electromagnetic wave shielding case 1, it is determined whether an abnormality occurs in the inspection equipment. A method of visually observing through the viewing window 30, or taking out a control signal or the like of an inspection device as a monitor signal, guiding the monitor signal to the outside of the case via wiring / terminals, etc., and performing a characteristic test or the like for an electromagnetic wave. The inspection may be performed by the above method.

[Brief description of the drawings]

FIG. 1 is a perspective view of the entire appearance with a lid opened.

FIG. 2 is a perspective view of the entire appearance with a lid closed.

FIG. 3 is a plan view.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view taken along line BB of FIG. 3;

FIG. 6 is a sectional view taken along the line CC of FIG. 3;

FIG. 7 is a perspective view for explaining a usage method with the lid closed.

FIG. 8 is a perspective view for explaining another method of use with the lid open.

FIG. 9 is a perspective view illustrating the method of using FIG. 8 with the lid closed.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 electromagnetic wave shielding case 2 case body 3 lid 6 external antenna 7 earphone jack 30 viewing window 31 opening 32 opening / closing lid P mobile phone

Continuation of the front page (56) References JP-A-10-90335 (JP, A) JP-A-7-250016 (JP, A) JP-A-10-142278 (JP, A) (58) Fields investigated (Int .Cl. ⁷ , DB name) G01R 29/08-29/10 G01R 31/00 H05K 9/00

Claims (5)

(57) [Claims] 1. An electromagnetic wave shielding case 1 capable of accommodating a wireless device P to be inspected, and electromagnetic wave introducing means for introducing electromagnetic waves into the case 1 by a predetermined amount, wherein the electromagnetic wave introducing means comprises: Opening provided in electromagnetic wave shielding case 1
From an opening 31 and an opening / closing lid 32 for opening and closing the opening 31
Becomes, opening of the change of the opening 31 by operating the lid 32
To adjust the amount of electromagnetic waves introduced.
Te Yes, the electromagnetic wave shield case 1 of the electromagnetic wave inspection instrument, characterized in that the display unit D of the radio P accommodated in the internal and allow visible from the outside. 2. The electromagnetic wave shielding case 1 includes :
The display unit D of the wireless device P accommodated in the unit is visually recognized from outside.
2. The electromagnetic wave inspection instrument according to claim 1 , further comprising a viewing window . 3. A wireless device P to be inspected can be accommodated.
Electromagnetic wave shield case 1 and electromagnetic wave
And electromagnetic wave introduction means for introducing a predetermined amount of
The electromagnetic wave shield case 1 has no
A viewing window 30 for visually recognizing the display unit D of the wire machine P from outside is provided.
The electromagnetic wave introducing means is provided in the electromagnetic wave shield case 1 in an insulated state from the case 1, and has an external antenna 6 which protrudes and contracts outside the case. An electromagnetic wave inspection instrument characterized in that the amount of electromagnetic waves introduced can be adjusted by doing so. 4. An electromagnetic wave shield case 1 comprising: a conductive coil body 8 wound in a cylindrical shape; and in the electromagnetic wave shield case 1, the coil body 8 can be externally fitted to an antenna rod of the wireless device P. The electromagnetic wave inspection instrument according to claim 3, wherein a base end of the external antenna (6) facing the inside of the shield case (1) is connectable to the coil body (8). 5. An electromagnetic wave shield case 1 includes a radio device P
To monitor the reception state comprises a earphone jack 7 which is connected to the radio P side, outlet earphone jack 7, claim faces the outside of the electromagnetic wave shield case 1 1 or 2, or The instrument for electromagnetic wave inspection according to 3 or 4.