KR101082733B1 - Electronic apparatus test box - Google Patents

Abstract

This invention makes it a subject to provide the test box for electronic devices which can perform the test of the electronic device which improved the radio wave shielding performance of the test box main body (test room) precisely, and also formed the ITO film | membrane in the glass plate in the film thickness. Even if a case or the ITO film | membrane is formed in both surfaces of a glass plate, it is a subject to provide the test box for electronic devices with high visual confirmation which can visually confirm the electronic device inside a test box main body visually. Metal fingers 30, 32, 33 mounted on the opening edge 12 of the test box body 10 or the periphery 22 of the door 20, which is the contact portion of the test box body 10 and the door 20. And packings 40, 41 and 42 having shielding properties of radio waves mounted on the periphery 22 of the door 20 or the opening edge 12 of the test box body 10, and further comprising a test box body. A radio wave absorber 530 attached to the inner circumferential surface of 510 and a bright insulating layer 540 fixed to the surface thereof are provided.

Test box body, finger, packing, electromagnetic wave absorber, insulation layer

Description

Test box for electronic device {ELECTRONIC APPARATUS TEST BOX}

The present invention relates to a test box for an electronic device for testing an electronic device such as a mobile phone.

In general, an electronic device such as a cellular phone may perform a radio connection test (hereinafter referred to as a test) by radio waves as to whether or not it normally operates and functions after manufacture or after repair. Conventionally, such a test is performed in a large special room called a radio wave anechoic chamber (radio dark room) in which foreign radio waves are cut off, or a box called a shield box (radio shielding box) in order to perform a test of accurate reception capability. It was done in.

For example, Document 1 below includes an outer housing having an inner housing made of aluminum that reflects radio waves, and a front panel on which a tray for mounting a mobile phone is fixed and which closes an opening formed in the housing. U-deep grooves provided on the outer circumference of the panel, partition plates provided in the openings of the inner housing to fit the U-deep grooves to form a radio wave maze, finger springs provided on the outer circumference of the partition plate, and A shield box is disclosed having EMI gaskets respectively installed at an inner circumferential L-angle and a bottom portion of a U-shaped deep groove of the front panel.

For example, Document 2 below discloses an open / close door (hinge type) having a test box body having an opening, a window having an indium tin oxide (ITO) film formed on one surface of the glass, and a test. Disclosed is a test box for an electronic device mainly provided with a waveguide for cable wiring provided on an upper surface of a box body.

The test box for electronic equipment includes a test box body provided with a radio wave absorption structure inside a metal housing, two hand insertion waveguides fixed to the front side of the test box body, and an ITO (Indium Tin) on one side. Oxide: A window provided with a glass plate on which an indium tin oxide film is formed is mainly provided. Such a test box for electronic devices has the advantage that the tester can directly operate by hand while performing visual confirmation of the electronic device inside the test box body.

[Patent Document 1] Japanese Patent Application Laid-Open No. 2005-252015

[Patent Document 2] Japanese Unexamined Patent Publication No. 2006-153841

By the way, with the recent high performance of electronic equipment, high sensitivity, etc., it is excellent in the shielding of an electric wave, and it can shield foreign radio waves reliably, and the test for the electronic device excellent in the radio wave shielding performance which can perform the test of an electronic device precisely. The need for boxes is increasing.

In the shield box described in Document 1, when the mobile phone is loaded into the tray and the front panel is slid and closed, the EMI gasket provided at the side of the groove where the finger spring is deep and the inner circumference of the partition plate is transferred. The front panel and the EMI gasket provided at the bottom of the U-shaped groove are in contact with the front end of the partition plate, so that radio waves passing through the gap between the front panel and the partition plate can be blocked by a triple shielding structure.

However, in a test box for an electronic device having a hinged door as described in the above-mentioned document 2, the test box main body has only a radio wave shielding structure including an EMI gasket, a conductive rubber packing, or the like at the contact portion between the test box body and the door. There was no radio wave shielding performance required recently. In addition, it is not practical to apply the radio wave shielding structure (door structure) described in patent document 1 to the door of a large room (test room) like a radio wave dark room.

Moreover, in order to improve the shielding of the radio wave of the test box (test box main body) for electronic devices as described in Document 2, it is necessary to form the ITO film which has the shielding property (reflectivity) of the radio wave in the film thickness in the glass plate installed in the window, There is a need to form ITO films on both surfaces of a glass plate.

Here, by forming an ITO film in a glass plate with a film thickness, or forming an ITO film in both surfaces of a glass plate, the shielding (reflectivity) of the radio wave of a glass plate becomes high, and it becomes possible to improve the shielding of the radio wave of a test box main body. However, since such a glass plate has a low permeability to visible light, the inside of the test box body is darkened, and the visibility is degraded by the naked eye, which is the original role of the window, and the electronic equipment inside the test box body is visually confirmed. There was a problem that became difficult to do.

Therefore, an object of this invention is to provide the test box for electronic devices which can perform the test of the electronic device which improved the radio wave shielding performance of the test box main body (test room) precisely, in order to solve such a problem, and also Even when the ITO film is formed on the glass plate with a film thickness, or when the ITO film is formed on both sides of the glass plate, the electronic device having high visual affinity that can visually check the electronic device inside the test box body with good visual observation The task is to provide a test box.

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, the test box for electronic devices which concerns on this invention is a test box body which has an electronic device inside, and has at least 1 opening part which communicates with an exterior and an inside, and hinges to the said test box body. A test box for an electronic device having a door mounted thereon and having a door for opening and closing the opening, wherein the metal finger is mounted on an opening edge portion of the test box body, which is a contact portion of the test box body and the door, or a peripheral part of the door; It is characterized in that it further comprises a packing having a shielding of radio waves mounted on the periphery of the or the opening edge of the test box body.

According to such a test box for electronic equipment, when the door is closed, a metal finger contacts the periphery of the door (or the opening edge of the test box body), and a packing having shielding of radio waves is opened in the test box body. Contact the edge (or the periphery of the door). As a result, the gap between the test box body and the door is closed, so that radio waves to invade from the contact portion between the test box body and the door cause diffraction loss in the finger or packing, and as a result, radio waves to invade from the contact portion. Can be effectively shielded.

Here, diffraction loss means that it is difficult to transfer and convey the radio wave toward the propagation direction side of the radio wave (in this case, the inner side of the test box main body) by reflecting the radio wave by a metal finger or the like.

The test box body of the test box for electronic equipment according to the present invention also includes a large room (test room) such as a radio wave dark room.

The test box for electronic equipment according to the present invention is further characterized in that the finger is attached to a side surface of a mounting plate provided at an opening edge portion of the test box body or a peripheral portion of the door.

According to such a test box for electronic equipment, the finger is mounted on the side of the upright mounting plate provided at the opening edge of the test box body (or the periphery of the door), so that the edge of the door (or the test box body at the time of closing the door). The restoring force of the finger deforming in contact with the opening edge portion thereof is perpendicular to the opening and closing direction of the door. With such a configuration, the door opening of the door due to the restoring force of the finger can be prevented. In addition, since the restoring force of the finger is perpendicular to the opening and closing direction of the door, the door can be fixed in the closed state.

The test box for electronic equipment according to the present invention is further characterized in that the packing is located on the outer circumferential side of the finger when the door is closed.

According to such a test box for electronic devices, since the packing is located on the outer circumferential side of the finger when the door is closed, the shielding function by the finger and the shielding function by the packing act synergistically, so that the test box main body and the door contact each other. It is possible to more effectively shield the radio waves to invade from the part. In addition, even if the shielding function of either the finger or the packing or the deterioration is reduced, the deterioration of the radio wave shielding performance of the test box for an electronic device can be prevented by the shielding function of the other.

Moreover, in order to solve the said subject, the test box for electronic devices which concerns on this invention is a test box main body which has an electronic device inside and has at least 1 opening part which communicates with an exterior, and the said test box main body A test box for an electronic device, which is mounted via a hinge and has a door that opens and closes an opening, wherein the insertion piece is formed on one side of an opening edge of the test box body, which is a contact portion between the test box body and the door, and a peripheral portion of the door. And an insertion groove which is formed on the other side and has an insertion groove into which the insertion piece is inserted when the door is closed, the finger is mounted on the inner peripheral side of the insertion piece or the insertion groove, and the packing is mounted on the bottom of the insertion groove. It is done.

According to such a test box for electronic devices, when the door is closed, the radio waves to intrude from the contact portion between the test box body and the door cause diffraction loss in the insertion piece or the insertion groove. In addition, the gap between the test box body and the door is closed by the finger contacting the opening edge of the test box body (or the periphery of the door), and the gap between the insertion piece and the insertion groove is blocked by the packing contacting the tip of the insertion piece. As a result, radio waves intended to invade from the contact portion cause diffraction loss in the finger or the packing. These can effectively shield the radio waves to invade from the contact portion.

Moreover, in order to solve the said subject, the test box for electronic devices which concerns on this invention is a test box main body which has an electronic device inside and has at least 1 opening part which communicates with an exterior, and the said test box main body A test box for an electronic device, which is mounted via a hinge and has a door that opens and closes an opening, wherein the insertion piece is formed on one side of an opening edge of the test box body, which is a contact portion between the test box body and the door, and a peripheral portion of the door. And an insertion groove formed on the other side, wherein the insertion piece is inserted when the door is closed, the finger is mounted on the insertion piece or the inner peripheral side of the insertion groove, and the packing is mounted on both sides of the insertion piece. .

According to such a test box for electronic devices, when the door is closed, the radio waves to intrude from the contact portion between the test box body and the door cause diffraction loss in the insertion piece or the insertion groove. In addition, since the finger contacts the opening edge of the test box body (or the periphery of the door), and the packing contacts both sides of the insertion groove, the gap between the test box body and the door is closed, so that the finger is to intrude from the contact portion. Propagation causes diffraction loss in the finger or packing. These can effectively shield the radio waves to invade from the contact portion.

In addition, the test box for electronic equipment according to the present invention is characterized in that a metal finger is mounted inside the insertion groove.

According to such a test box for electronic devices, since the metal finger is also attached to the inside of the insertion groove, the finger contacts the insertion piece when the door is closed. As a result, the gap between the insertion piece and the insertion groove is closed, so that radio waves intended to invade from the contact portion of the test box body and the door cause diffraction loss at the finger, and as a result, radio waves intended to invade from the contact portion are observed. It can shield effectively.

Moreover, the test box for electronic devices which concerns on this invention is characterized by the metal finger being provided in the said insertion piece.

According to such a test box for an electronic device, since a metal finger is also provided in the insertion piece, when a door is closed, a finger contacts the inside of an insertion groove. As a result, the gap between the insertion piece and the insertion groove is closed, so that radio waves to invade from the contact portion of the test box body and the door cause diffraction loss in the finger, and as a result, the radio waves to invade from the contact portion are further increased. It can shield effectively.

Moreover, the test box for electronic devices which concerns on this invention is characterized by the said test box main body being provided with the duct which conducts the cable which can be connected to an electronic device inside, while preventing electromagnetic interference.

According to such a test box for electronic devices, the test box main body is provided with a duct for preventing electromagnetic interference and conducting a cable connected to the electronic device therein, whereby the electromagnetic interference can be appropriately prevented and tested. Cables can be wired from the outside of the box body to the inside. In addition, it is possible to shield the radio wave to be intruded from the insertion passage portion of the cable by acting as a waveguide of the duct.

The test box for electronic equipment according to the present invention is further characterized in that the cable is an optical cable for transmitting an optical signal.

According to such a test box for electronic equipment, electromagnetic interference can be prevented favorably by making a cable into the optical cable which transmits an optical signal.

Moreover, in order to solve the said subject, the test box for electronic devices which concerns on this invention is formed in the test box body which has an electronic device inside, and has the shielding of the radio wave from the outside, and the said test box body, A test box for an electronic device having a window provided with a glass plate having shielding of radio waves and transmittance to visible light, wherein the test box body includes a radio wave absorber mounted on an inner circumferential surface thereof and a light-colored insulation fixed to the surface of the radio wave absorber. It is characterized by further comprising a layer.

According to such a test box for electronic devices, since the inside of the test box body is brightened by a bright insulating layer fixed to the surface of the radio wave absorber, an ITO film is formed on the glass plate with a film thickness, or on both sides of the glass plate. By forming a film, even when the glass plate permeability | transmittance to visible light falls, the electronic device inside the test box main body can be visually confirmed satisfactorily.

In addition, in this invention, light color means the color whose brightness prescribed | regulated to Munsell color system (JIS Z8721) exists in the range of 8.0-10.0.

In addition, in this invention, an insulating layer means the layer which consists of a material whose volume resistance value is 10 ⁶ ohm-cm or more. The insulating layer is called an insulating plate or an insulating film according to its thickness, but the boundary (critical value) of the thickness of the insulating plate or the insulating film is not clear. Therefore, in this invention, an insulating layer shall contain both an insulating plate and an insulating film. As a specific example of an insulating plate, a resin plate, a ceramic plate, a glass plate, a thick paper, etc. are mentioned, for example. As a specific example of an insulating film, a resin film, paper, etc. are mentioned, for example.

In addition, according to such a test box for electronic devices, since a radio wave absorber is provided on the inner circumferential surface of the test box body, it is possible to effectively absorb radio waves emitted from, for example, an antenna of an electronic device, a measuring antenna, or the like during the test. As a result, the resonance phenomenon of radio waves can be prevented, and an electronic device can be tested precisely.

In addition, the resonance phenomenon of radio waves refers to a phenomenon in which radio waves repeatedly reflect and cause interference at the wall surface inside the test box main body when radio waves are radiated inside the test box main body having the shielding property of radio waves.

In addition, the test box for electronic equipment according to the present invention is characterized in that the insulating layer is made of a resin containing a pigment of bright color.

According to such a test box for electronic devices, by making an insulating layer into the resin containing a bright pigment, what uses not only resin which shows a bright color, but also contains a pigment of bright color even if it is a transparent resin etc. is used, for example. It becomes possible and can select resin used as a raw material of an insulating layer widely. Moreover, since it is excellent in durability and rigidity, it becomes possible to drill and install a screw hole etc., and can use it as a board | substrate for latching | fastening the connector (connection plug), jig, etc. which were provided in the inside of a test box main body.

Moreover, the test box for electronic devices which concerns on this invention is characterized in that the said insulating layer consists of foamed resin.

According to such a test box for electronic devices, even if the transmittance of visible glass of the glass plate is lowered by forming an ITO film on the glass plate with a film thickness or by forming the ITO film on both sides of the glass plate, the surface of the radio wave absorber is fixed. Since the inside of the test box main body is brightened by the foamed resin, the electronic equipment inside the test box main body can be visually confirmed with good visual quality. That is, since foamed resin contains foam | bubble inside, when the visible light from the exterior is diffusely reflected, when a colorless transparent resin is used as a base material, it becomes white generally. Therefore, visual confirmation is effective. Moreover, as long as it is resin plates, such as foamed styrol, the effect of being easy to process and handle can be acquired. In addition, it is possible to reduce the raw material cost by using the foamed resin as the insulating layer. In addition, since the foamed resin is light and easy to cut, can be easily processed and handled, and also has excellent workability, it is possible to lower the manufacturing cost of the test box body.

Moreover, the test box for electronic devices which concerns on this invention is characterized by the said insulating layer consisting of the paper which consists of the dye of bright color, or the paper in which the pigment of bright color was printed.

According to such a test box for electronic devices, in addition to the effect as in the invention according to claim 10, a lightweight and easy-to-cut paper is used, and the effect of the processing and handling can be obtained. . In addition, by using paper as the insulating layer, it is possible to reduce the raw material cost, and to be lightweight, easy to cut, easy to process and handle, and excellent in workability. The manufacturing cost can also be lowered.

In addition, the test box for electronic equipment according to the present invention is characterized in that the pigment is a white pigment or a fluorescent pigment.

According to such a test box for electronic devices, since the inside of a test box main body can be appropriately brightened by making a pigment into a white pigment or a fluorescent pigment, the electronic device inside the test box main body can be visually confirmed satisfactorily. .

In the present invention, the fluorescent pigment is a pigment that emits visible light having a specific wavelength when electrons are excited by irradiation with ultraviolet rays and the electrons are returned to the ground state.

In addition, the test box for electronic equipment according to the present invention is characterized in that the insulating layer is made of bright colored ceramics or glass.

Here, it is possible to use ceramics having a brightness within the above range, such as quartz, aluminum oxide, silicon carbide. With respect to glass, the surface has properties similar to that of glass, which diffuses light, and is particularly advantageous in view of visual confirmation. According to such a test box for electronic devices, by using ceramics or glass, it is possible to provide an insulating layer which is excellent in strength, durability and weather resistance, and which does not use dye for increasing the brightness at the manufacturing stage.

The test box for electronic equipment according to the present invention is further characterized in that the radio wave absorber is a lambda / 4 type radio wave absorber.

According to such a test box for electronic equipment, the radio wave absorber is a lambda / 4 type radio wave absorber having a simple structure and easy design, so that it is optimal according to the wavelength of the radio wave radiated inside the test box body. Since a radio wave absorber having a phosphorus wave absorption capability can be designed, it is possible to more effectively absorb radio waves radiated from inside the test box body. As a result, the resonance phenomenon of radio waves can be effectively prevented, and an electronic device can be tested precisely.

In addition, the test box for electronic equipment according to the present invention is characterized in that the insulating layer also serves as a protective film of the lambda / 4 type electromagnetic wave absorber.

According to such a test box for electronic devices, since the insulating layer also serves as a protective film of the lambda / 4 type radio wave absorber, it is not necessary to fix the light insulating layer on the surface of the protective film of the lambda / 4 type radio wave absorber, The structure of the test box body can be simplified, and the material cost and manufacturing cost can be suppressed.

Moreover, the test box for electronic devices which concerns on this invention is equipped with illumination in the inside of a test box main body, It is characterized by the above-mentioned.

According to such a test box for electronic devices, since the inside of a test box main body can be made brighter by illuminating the inside of a test box main body, the electronic device inside the test box main body can be visually confirmed better.

The test box for electronic equipment according to the present invention is also characterized in that the illumination is an LED lamp.

According to such a test box for electronic devices, by using the illumination as an LED lamp, the inside of the test box main body can be brightened, and noise is hardly generated at the time of blinking, so that the test of the electronic device can be performed precisely. .

The test box for electronic equipment according to the present invention is further characterized in that the insulating layer is fixed to the surface of the radio wave absorber with a pin or a screw.

According to such a test box for electronic devices, since the insulating layer is fixed to the surface of the radio wave absorber with a pin or a screw, the surface resistance value of the radio wave absorber is not changed, so that the performance of the radio wave absorber can be sufficiently exhibited.

In addition, when the insulating layer is fixed to the surface of the radio wave absorber with an adhesive, the surface resistance value of the radio wave absorber is changed, and the reflection of radio waves occurs on the surface of the radio wave absorber, which is supposed to transmit radio waves. Not. However, it is possible to suppress radio wave reflection by using, for example, an adhesive excellent in insulating properties such as a thermoplastic adhesive, a thermosetting adhesive, a photocurable adhesive, or the like. Also, for the bonding method, for example, bonding the insulating film with a spot, etc., and devising the bonding area to a minimum, fixing the insulating film to the surface of the electromagnetic wave absorber with almost no damage to the electromagnetic wave absorbing characteristics of the electromagnetic wave absorber. It is possible to.

According to the present invention, since a packing having a metal finger or radio wave shielding property is provided at the contact portion between the test box body and the door, it is possible to effectively shield the radio waves from entering the outside of the test box body. Thereby, the test box for electronic devices excellent in the electromagnetic wave shielding performance which can test an electronic device precisely can be provided. Further, according to the present invention, even when the ITO film is formed on the glass plate with a film thickness or when the ITO film is formed on both sides of the glass plate, the naked eye can visually check the electronic device inside the test box body with good visual observation. A test box for highly verifiable electronic equipment can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is the whole perspective view which shows one Embodiment of the test box for electronic devices which concerns on this invention.

FIG. 2 is a II-II cross-sectional view of the test box for electronic equipment shown in FIG. 1. FIG.

3 is a cross-sectional view taken along line III-III of the test box for electronic devices shown in FIG. 1.

4 is a cross-sectional view taken along line IV-IV of the test box for electronic devices shown in FIG. 1.

FIG. 5A is a perspective view of a honeycomb filter, and FIG. 5B is a perspective view of a mesh filter.

FIG. 6A is a schematic diagram showing a state in which the door of the radio wave shield structure according to the first embodiment is opened, and FIG. 6B is a schematic diagram showing a state in which the door is closed.

FIG. 7A is a schematic diagram showing a state in which the door of the radio wave shielding structure according to the second embodiment is opened, and FIG. 7B is a schematic diagram showing a state in which the door is closed.

FIG. 8A is a schematic diagram showing a state in which the door of the radio wave shielding structure according to the third embodiment is opened, and FIG. 8B is a schematic diagram showing a state in which the door is closed.

FIG. 9A is a schematic view showing a state in which the door of the radio wave shielding structure according to the fourth embodiment is opened, and FIG. 9B is a schematic view showing a state in which the door is closed.

FIG. 10A is a schematic diagram showing a state in which the door of the radio wave shield structure according to the fifth embodiment is opened, and FIG. 10B is a schematic diagram showing a state in which the door is closed.

It is a horizontal sectional view which shows other embodiment of the test box for electronic devices which concerns on this invention.

It is a front view containing some cross-sectional part which shows one Embodiment of the test box for electronic devices which concerns on this invention.

FIG. 13 is a II-II cross-sectional view of the test box for electronic equipment shown in FIG. 12.

It is a longitudinal cross-sectional view which shows one Embodiment of the test box for electronic devices which concerns on this invention.

FIG. 15 is a cross-sectional view taken along line IV-IV of the test box for electronic devices shown in FIG. 12.

16 (a) to 16 (c) are cross-sectional views showing structural examples of glass plates.

FIG. 17A is a cross-sectional view showing the structure of the lambda / 4 type radio wave absorber, and FIG. 17B is a cross-sectional view showing the structure of the lambda / 4 type radio wave absorber in which the resin film also serves as a protective film.

FIG. 18A is a perspective view of a honeycomb filter, and FIG. 18B is a perspective view of a mesh filter.

[Description of the code]

1: test box for electronic devices

10: test box body

11: opening

12: opening corner

20: door

22: periphery

30, 32, 33: fingers

31: erum installation plate

40, 41, 42: packing

50: insertion piece

60: insertion groove

140: EMI duct

180: cable

184: optical cable

H: hinge

P: electronic equipment

501: Test box for electronic equipment

510: test box body

520: window

521: glass plate

530: radio wave absorber (λ / 4 type radio wave absorber)

533: shield

540: resin film (insulation layer)

550: LED lamp (lighting)

P: electronic equipment

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described, referring drawings suitably. 1 is an overall perspective view of a test box for an electronic device.

As shown in FIG. 1, the test box 1 for an electronic device includes a test box body 10 having an opening 11 communicating with the outside and the inside while the electronic device P is placed therein, The test box main body 10 is provided via a hinge (not shown), mainly provided with a door 20 for opening and closing the opening 11, and a contact portion between the test box main body 10 and the door 20. Packing having shielding property of metal finger 30 attached to the side of the mounting plate 31 installed on the periphery 22 of the in door 20 and radio waves mounted on the periphery 22 of the door 20. 40 is further provided.

Hereinafter, first, the structure of each part of the test box main body 10 and the door 20 is demonstrated, referring drawings suitably. 2 is a cross-sectional view taken along line II-II of FIG. 1, FIG. 3 is a cross-sectional view taken along line III-III of FIG. 1, and FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 1.

2 to 4, the test box body 10 includes a metal housing 110, an electromagnetic wave absorber 120 provided on an inner surface of the housing 110, and an inner surface of an upper wall of the housing 110. LED lamp 130 provided on the side, EMI duct 140 provided on the back side of the housing 110, honeycomb filter 150 made of metal, and antenna 160 provided on the inner surface side of the side wall of the housing 110. And a mounting unit 170 to which the electronic device P is fixed.

As shown in FIG. 2, the housing 110 welds a plurality of metal panels 111 to a frame (not shown) serving as a skeleton, and has a substantially rectangular box shape having an opening 11 at the front side. It is formed. Since the housing 110 is formed of a conductive metal panel 111 and a frame (not shown), the housing 110 has a predetermined rigidity, increases its durability, and has a shielding against radio waves from the outside. In addition, since the panel 111 and the frame (not shown) are joined by welding, the sealing property of the housing 110, that is, the shielding of radio waves is improved.

The metal forming the panel 111 and the frame (not shown) is not particularly limited in the present invention, and not only a pure metal (for example, aluminum, steel, copper, etc.) but also an alloy (for example, aluminum alloy, stainless steel). Etc.) may be sufficient. In addition, when the panel 111 and the frame (not shown) are formed of aluminum or an aluminum alloy, the desired rigidity can be maintained, and the housing 110 can be reduced in weight. In addition, since aluminum or an aluminum alloy has a unique luster, the housing 110 has an excellent aesthetic appearance.

The electromagnetic wave absorber 120 pseudo-absorbs radio waves radiated from the electronic device P or the antenna 160 without reflecting them from the inner surface of the housing 110 (test box body 10), thereby providing a test box body ( It is to prevent the radio waves radiated from the inside of the antenna 10 and the reflected radio waves from resonating, and as shown in FIG. 2, the inner surface of each panel 111 is covered.

The kind of such a radio wave absorber 120 is not specifically limited in this invention, According to the characteristic of the radio wave radiated | emitted inside, a well-known radio wave absorber can be used widely. For example, any of a resistive radio wave absorber, a dielectric radio wave absorber, a magnetic wave absorber, and a radio wave absorber in combination thereof may be used, and any one of a single layer type and a multilayer type may be used.

Specifically, for example, (1) from the side of the panel 111, a spacer having a thickness of λ / 4 (λ is a wavelength of radio waves radiated inside the test box body), and the surface resistance value of the free space (2) A resistive film sheet (impedance 1088 ohms) and a spacer (38mm) sequentially from the side of the panel 111, (lambda / 4 type | mold electromagnetic wave absorber provided with a protective film made of resin, a protective film made of resin) ), A radio wave absorber capable of absorbing two kinds of radio waves (around 80 MHz and around 2050 MHz) including a resistive sheet (impedance 280 Ω), a spacer (38 mm), and a protective film (aluminum plate or aluminum foil), and (3) carbon. Dielectric wave absorption sheet formed of a compound such as powder or titanium oxide, (4) Magnetic wave absorption sheet formed of a compound such as ferrite or carbonyl iron, (5) Radio wave formed of a composite of resin and magnetic body such as polyurethane Absorption sheet, (6) magnetic material and resistor Any of the bonded radio wave absorbers (for example, Lumidion (registered trademark) (Toyo Service Co., Ltd.)) can be used.

In addition, the surface of the electromagnetic wave absorber 120 is preferably flat (flat type). According to this, for example, the inside (volume) of the test box main body 10 is increased or the size of the test box main body 10 is increased in comparison with the case where a wave absorber such as a wave shape, a mountain shape, or a square pyramid is provided. It can be made small.

The LED (Light Emitting Diode) lamp 130 is illumination for illuminating the inside of the test box main body 10, and is provided on the upper wall of the housing 110 as shown in FIG. 3. Thereby, for example, while testing the electronic device P, the electronic device P can be visually confirmed by illuminating the inside of the test box main body 10. Unlike the fluorescent lamp, the LED lamp 130 hardly generates noise at the time of blinking, and therefore, the LED lamp 130 can be suitably used as illumination for illuminating the inside of the test box main body 10.

In addition, the mounting position, number, arrangement | positioning, etc. of the LED lamp 130 can be set suitably, It is not limited to the structure shown in FIG. In addition, the illumination which illuminates the inside of the test box main body 10 is not limited to an LED lamp, For example, a halogen lamp, an incandescent lamp, etc. may be sufficient.

Electromagnetic Interference (EMI) Duct 140 prevents electromagnetic interference and inserts a cable 180 connected to an electronic device P or the like from the outside of the housing 110 to the inside. It is a duct and is fixed to the back surface of the housing 110 via the gasket 141 which has insulation resistance as shown in FIG.

As a result, the cable 180 can be wired from the outside to the inside of the test box main body 10 via the EMI duct 140, and also acts as a waveguide of the duct (transmitting a radio wave having a wavelength longer than a predetermined wavelength). Radio wave to be intruded from the insertion passage portion of the cable 180 can be shielded, so that the shielding of the radio wave of the test box body 10 can be properly maintained.

In addition, as shown in FIG. 2, electromagnetic interference is prevented by wiring the cable 180 so that a predetermined length (for example, 100 mm or more) of the cable 180 passes through the inside of the EMI duct 140. It can prevent appropriately.

In addition, as shown in FIG. 2, the cable 180 includes a noise absorber that absorbs noise that conducts the inside of the cable 180 to the outer circumferential surface of the portion passing through the inside of the EMI duct 140 and the predetermined front and rear portions. 181 is covered. Specifically, for example, an EMI tape such as Lumidion (registered trademark) (Toyo Service Co., Ltd.) is wound around the cable 180 in a predetermined length (for example, 300 mm or more). As a result, since the copying and transmission and transportation of noise from the cable 180 can be suppressed, the test unit 190 can control and measure the radio waves transmitted and received by the electronic device P with high accuracy.

Such an EMI duct 140 is made of a die cast, and as shown in FIG. 4, a plurality of concave grooves 142 are formed on the side (the side of the housing 110) through which the cable 180 passes. By passing the cable 180 through the recess 142, the cable 180 can be prevented from moving up and down in the EMI duct 140, and the cable 180 can be aligned. In addition, when the plurality of cables 180 are passed through the EMI duct 140, the space between the cables is filled by the side wall portion (metal) of the recessed groove 142, so that the propagation of the test box main body 10 The shielding can be properly maintained. Moreover, since each cable can be wired in parallel, for example, when attaching the earth etc. which come into contact with each cable uniformly, the attachment becomes easy.

The honeycomb filter 150 is a filter for supply / exhaust that communicates with the outside of the test box body 10 and shields the radio waves to intrude from the outside of the test box body 10, as shown in FIG. As described above, the gasket 151 having insulation resistance is fixed to the rear surface of the housing 110. 5A is a perspective view illustrating a honeycomb filter.

In more detail, the honeycomb filter 150 is made of metal (for example, made of aluminum or aluminum alloy) having a plurality of fine holes 152 having a regular hexagonal shape when viewed from the front, as shown in FIG. And a plurality of thin holes 152 to secure the flow of air outside and inside the test box body 10, and to radiate from, for example, the electronic device P. It is possible to exhaust the heat. In addition, the shape of the thin hole 152 is not limited to a regular hexagon, For example, it may be circular, square, etc.

In addition, since the thin hole 152 is surrounded by a circumferential wall 153 having a function as a waveguide, it is not intended to penetrate from outside of the test box body 10 because it does not transmit and carry radio waves of a wavelength longer than a predetermined wavelength. Can effectively shield radio waves. In addition, the waveguide consists of the opening diameter of the through hole 112 (refer FIG. 4) formed in the back surface of the housing 110 (test box main body 10), and the length of the honeycomb filter 150 (circumference wall 153). Length] and the opening diameter (distance between two opposite sides of the regular hexagon) of the thin hole 152 are set based on the wavelength of the radio wave which does not convey and carry the inside of the honeycomb filter 150. FIG.

Here, in general, the waveguide has the same shape and dimensions (length) of the opening, and the longer the waveguide, the higher the shielding performance of radio waves. Moreover, although it depends also on the shape of the opening part of a waveguide, as the area of an opening part becomes small, the limit frequency (predetermined frequency) of the radio wave which can shield a waveguide becomes high.

In addition, it is good also as a structure provided with the mesh filter 155 as shown to FIG. 5 (b) instead of said honeycomb filter 150 mentioned above. 5B is a perspective view illustrating a mesh filter.

The mesh filter 155 is a filter for supply / exhaust that communicates with the outside and the inside of the test box body 10 and shields the radio waves to invade from the outside of the test box body 10, and like the honeycomb filter, It is fixed to the back surface of the housing 110 via the gasket which has insulation resistance (refer FIG. 4).

The mesh filter 155 is a mesh laminate in which a plurality of meshes of metal (for example, made of aluminum, made of aluminum alloy, etc.) are stacked, and the air flows outside and inside the test box body 10 through the mesh. Is secured, and the heat radiated from the electronic device P or the like can be exhausted, for example. In addition, since diffraction loss of radio waves occurs inside the metal mesh laminate, radio waves intended to intrude from the outside of the test box body 10 can be effectively shielded.

The antenna 160 is an antenna for transmitting and receiving radio waves to and from the electronic device P. As shown in FIGS. 2 to 4, the antenna 160 is connected to the connector 161 fixed to the side wall of the housing 110. It is provided through the waveguide 162. One end of a cable (not shown) is connected to the antenna 160, and the cable (not shown) is led out to the outside of the test box body 10 through the antenna waveguide 162. The end is connected to a radio wave transmitting and receiving unit (not shown).

The radio wave transmitting / receiving unit (not shown) radiates radio waves to the antenna 160, controls the frequency band and output of the radio waves, or radio waves from the electronic device P received by the antenna 160. Has the function of measuring.

The connector 161 is for fixing the waveguide 162 for antennas, and is installed in a state where it is fixed to the side wall of the housing 110. The connector 161 is loosened to rotate the antenna waveguide 162, the antenna 160 is changed in direction, and the connector 161 is fastened to fix the antenna waveguide 162 again to thereby secure the antenna 160. You can change the direction of).

As a result, the polarization plane of the radio wave radiated from the antenna 160 and the polarization plane of the radio wave radiated from the antenna Pa (see FIG. 3) of the electronic device P are parallel or vertical. The axis of rotation can be adjusted.

In addition, the polarization plane refers to the oscillating surface of the wave of the electric field in the electromagnetic wave, and the electromagnetic wave in a constant planar shape is called a linear polarization. Radio waves radiated from a conventional antenna are linearly polarized waves.

As shown in FIGS. 2 and 4, the connector 161 may be provided with a connector 163 that is separate (preliminary) on its left and right (horizontal directions). As a result, since the antenna waveguide 162 can be replaced at a desired position, the antenna 160 can be disposed at a desired position. In addition, you may install these connectors 163 in the up-and-down (vertical direction) of the connector 161, and may provide two or more of these connectors 161 in the left-right, up-down direction.

The antenna waveguide 162 is a metal waveguide formed by, for example, aluminum or an aluminum alloy, which is bent in a cylindrical shape or an L shape, and has shielding of radio waves. The antenna waveguide 162 communicates with the outside of the test box main body 10, and a cable (not shown) connected to the antenna 160 is wired to the hollow portion (inside). Further, a rectangular ground plate 164 is fixed to the tip of the antenna waveguide 162. In addition, the cross section of the waveguide 162 for antennas is not limited to a circular shape, For example, a polygon may be sufficient.

The specification of the waveguide 162 for antennas is set based on the wavelength of the radio wave which does not transmit and convey the inside. Specifically, the inner diameter and the length of the antenna waveguide 162 are set so that radio waves of a wavelength longer than a predetermined wavelength do not transmit and carry the inside thereof. Thereby, the shielding of the radio wave of the test box main body 10 can be maintained suitably.

In general, when the antenna is installed in close proximity to a metal object, eddy currents flow through the metal object, causing re-radiation of radio waves, and so on, interfering with and affecting the radio waves appropriately radiated to the test provider. Therefore, as shown in FIG. 4, it is preferable to provide the magnetic sheet 165 on the side wall of the housing 110 near the antenna 160 (the antenna 160 includes the magnetic sheet 165 and the electronic device). Between (P)]. Thereby, the influence of re-emission of radio waves by the eddy current as described above can be reduced.

The mounting unit 170 is a unit for fixing the electronic device P to the inside of the housing 110, and as shown in FIGS. 2 and 3, the mounting unit 170 is installed to cover the entire bottom surface of the housing 110. It consists of the holding plate 171 and the holding fixing jig 172 which is detachably fixed to this holding plate 171, and hold | maintains and fixes the electronic device P. As shown in FIG.

As shown in FIG. 2, the fixing plate 171 is a plate member having a rectangular shape in plan view, and a plurality of bolt holes 171a for fixing the holding fixing jig 172 are formed. The bolt hole 171a is provided in plural in parallel in the left-right direction as seen from the front of the housing 110 so that the fixed position of the holding fixing jig 172 may be changed to a desired position. In addition, a radio wave absorption sheet having radio wave absorptivity may be provided on the stationary plate 171, or the stationary plate 171 may be formed of a member having radio wave absorptivity.

As shown in Fig. 3, the holding fixing jig 172 is an L-shaped member viewed from the side, and a bolt hole 172a for screwing the bolt B in the bottom is formed. The bolt B is screwed into the bolt hole 171a of the fixing plate 171 through this bolt hole 172a, so that the holding fixing jig 172 is fixed to the fixing plate 171. The holding plate 173 and the fixing tool 174 are attached to the holding fixing jig 172.

The mounting plate 173 is a long plate (see FIG. 2), and is fixed to the holding fixing jig 172. In addition, the fastener 174 is a member for holding the electronic device P, and an insertion passage portion 174a for inserting and holding the electronic device P is formed. The fastener 174 is detachably attached to the mounting plate 173, and the mounting direction and the mounting position of the electronic device P can be changed as desired.

The test unit 190 (refer to FIG. 2) detects a reception state of a radio wave of the electronic device P, that is, a unit for controlling and measuring radio waves transmitted and received by the electronic device P, so that the electronic device P is normally operated. It is a unit that can determine whether or not it is operating and transmit various instructions to the electronic device P to operate.

Such a test unit 190 can be connected to the electronic device P which is a test target through the cable 180. Specifically, one end of the cable 180 is connected to the test unit 190, the other end is drawn out into the test box body 10 via the EMI duct 140, and the electronic device P Is connected to. In addition, a connector (not shown) for detachably connecting to the electronic device P is provided at the other end of the cable 180.

As shown in FIG. 2, the door 20 is rotatably mounted to the side surface of the test box main body 10 via the hinge H, and has the structure which can be opened and closed suitably. The door 20 is formed of a metal panel 201, and a window 210 is formed on the right side when viewed from the front of the panel 201. As shown in FIG. 2, the electromagnetic wave absorber 120 is formed to cover the inner surface of the panel 201.

In addition, the metal which forms the panel 201 is not specifically limited in this invention, It may be not only pure metal (for example, aluminum, steel, copper, etc.) but also alloy (for example, aluminum alloy, stainless steel, etc.).

The window 210 is provided with a rectangular glass plate 211 having transparency to visible light. Thereby, since the inside of the test box main body 10 can be visually confirmed from the outside through the window 210 (glass plate 211), while testing the electronic device P, for example, it propagates, for example. The presence or absence of the lighting of the incoming lamp of the electronic device P by having received this can be confirmed.

The glass plate 211 has reflectivity (blocking property) of radio waves in order to prevent the transmission and reception of radio waves through the window 210 (glass plate 211). Thereby, the shielding of the radio wave of the test box main body 10 can be maintained suitably. As the glass plate 211, for example, an indium tin oxide (ITO) film formed on at least one surface of the glass plate 211 can be used.

In addition, as shown in FIG. 2, the glass plate 211 includes a packing 212 having shielding property of radio waves in the concave groove 203 formed around the opening 202 for the window formed in the door 20 ( For example, it is fixed through conductive rubber packing). Thereby, since the shielding of the radio wave in the peripheral part of the window 210 (glass plate 211) can be ensured, the shielding of the radio wave of the test box main body 10 can be maintained suitably.

In addition, when the radio wave radiated | emitted from the electronic device P, the antenna 160, etc. in the inside of the test box main body 10 is irradiated directly to the window 210 (glass plate 211), the electric wave is window 210 Since the resonance phenomenon of radio waves is reflected from the surface of the [glass plate 211], the window 210 is located at a position where radio waves radiated from the electronic device P or the antenna 160 are not irradiated as much as possible. It is desirable to install.

Here, the resonance phenomenon of radio waves refers to a phenomenon in which radio waves repeatedly reflect and cause interference on the wall inside the test box main body when radio waves are radiated from an antenna or the like inside the test box main body having shielding of radio waves. .

In the above, the door 20 is attached to the opening edge 12 of the test box body 10 and / or the periphery part 22 of the door 20 which is the contact part of the test box main body 10 and the door 20 demonstrated. When closed, the radio wave shielding structure which shields the radio wave from the outside is formed.

Next, an embodiment of this radio wave shielding structure will be described with reference to the drawings as appropriate. 1, 2, and 4 are radio wave shielding structures according to the first embodiment described later.

[First Embodiment]

Fig. 6A is a schematic diagram showing a state in which the door is opened, and Fig. 6B is a schematic diagram showing a state in which the door is closed.

As shown in FIG. 6A, the radio wave shielding structure according to the first embodiment is provided at the periphery 22 of the door 20, which is a contact portion between the test box body 10 and the door 20. The metal finger 30 attached to the side surface of the mounting plate 31 and the packing 40 which has the shielding of the electric wave provided in the periphery 22 of the door 20 are comprised.

The finger 30 is also called a shield finger, a finger strip, or the like. In the present embodiment, a plate formed by bending an arc-shaped portion of the comb teeth of a strip-shaped metal plate that is substantially comb-shaped in a cross-sectional view is formed. It is a spring member, pressed in the vertical direction of the mounting surface, and has a shielding of radio waves. The finger 30 is made of an L-shaped metal (for example, made of aluminum, made of aluminum alloy, etc.) in the cross-section fixed around the periphery of the periphery 22 of the door 20, for example, by welding or the like. Is mounted on the outer circumferential side of the mounting plate 31.

The metal forming such a finger 30 is not particularly limited in the present invention, and may be an alloy as well as a pure metal. In particular, it is preferable to use a copper alloy. Since the copper alloy mainly made of copper has high electroconductivity, the shielding of the electric wave of the finger 30 can be improved. In addition, since the copper alloy is excellent in elastic performance, the contact resistance can be reduced. As such a copper alloy, a beryllium copper alloy etc. are mentioned, for example.

The packing 40 coats a sponge material having elasticity (cushionability) with a conductive fabric and has shielding of radio waves. This packing 40 is attached to the outer circumferential side of the finger 30 (standing plate 31) provided around the periphery of the periphery 22 of the door 20. Examples of the conductive fabric include those obtained by plating fibers with nickel. Moreover, it is preferable that the permanent strain of a packing is 60% or less.

In the radio wave shielding structure according to the first embodiment having such a configuration, as shown in FIG. 6B, when the door 20 is closed, the finger 30 opens the test box body 10. The packing 40 is in elastic contact with the opening edge 12 of the test box body 10 while elastically contacting the edge 12 (the bent portion 13). As a result, the gap between the test box main body 10 and the door 20 is reliably closed by the finger 30 and the packing 40, and therefore, from the contact portion between the test box main body 10 and the door 20. Since the radio waves to invade cause diffraction loss in the finger 30 or the packing 40, it is possible to effectively shield the radio waves to invade from the contact portion.

Moreover, since the finger 30 is attached to the mounting plate 31 as shown in FIG. 6, the finger 30 which contacts and deforms the test box main body 10 when the door 20 is closed is shown. The restoring force is applied perpendicularly to the opening and closing direction (left and right direction in FIG. 6) of the door 20 (up and down direction in FIG. 6). Thereby, the door opening of the door 20 by the restoring force of the finger 30 can be prevented, and the door 20 can be fixed to a door closed state.

In addition, since the packing 40 is mounted on the outer circumferential side of the finger 30 as shown in FIG. 6, the shielding function by the finger 30 and the shielding function by the packing 40 act synergistically. Therefore, the radio wave to intrude from the contact part of the test box main body 10 and the door 20 can be shielded more effectively. In addition, even if the shielding function of either the finger 30 or the packing 40, and either one of the shielding functions, the sudden drop of the radio wave shielding performance of the test box 1 for an electronic device can be prevented by the other shielding function.

In addition, the finger 30 may be mounted directly on the periphery 22 of the door 20 without interposing the mounting plate 31. In addition, the packing 40 may be attached to the side of the opening edge part 12 of the test box main body 10.

Second Embodiment

FIG. 7A is a schematic diagram showing a state in which the door is opened, and FIG. 7B is a schematic diagram showing a state in which the door is closed.

The radio wave shield structure which concerns on 2nd Embodiment is the opening edge part 12 of the test box main body 10 which is a contact part of the test box main body 10 and the door 20, as shown to Fig.7 (a). It consists of a metal finger 30 mounted on the side of the mounting plate 31 installed in the c) and a packing 40 having shielding of radio waves mounted on the periphery 22 of the door 20.

In the radio wave shielding structure according to the second embodiment, the metal mounting plate having an L shape in cross section, in which the finger 30 is fixed to the entire circumference of the opening edge portion 12 of the test box body 10 ( The point attached to the outer peripheral side surface of 31) differs from the radio wave shielding structure according to the first embodiment.

In the radio wave shielding structure according to the second embodiment having such a configuration, as shown in FIG. 7B, when the door 20 is closed, the finger 30 has a peripheral portion 22 of the door 20. ) And the packing 40 elastically contact the opening edge part 12 of the test box main body 10 at the same time. As a result, the gap between the test box main body 10 and the door 20 is reliably closed by the finger 30 and the packing 40, and therefore, from the contact portion between the test box main body 10 and the door 20. Since the radio waves to invade cause diffraction loss in the finger 30 or the packing 40, it is possible to effectively shield the radio waves to invade from the contact portion.

Moreover, since the finger 30 is attached to the upright mounting plate 31 as shown in FIG. 7, the restoring force of the finger 30 which contacts and deforms the door 20 when the door 20 is closed. This is caught vertically (up and down direction in FIG. 7) with respect to the opening and closing direction (left and right direction in FIG. 7) of the door 20. Thereby, opening of the door 20 by the restoring force of the finger 30 can be prevented, and the door 20 can be fixed to a closed state.

In addition, since the packing 40 is mounted on the outer circumferential side of the finger 30 as shown in FIG. 7, the shielding function by the finger 30 and the shielding function by the packing 40 act synergistically. Therefore, the radio wave to intrude from the contact part of the test box main body 10 and the door 20 can be shielded more effectively. In addition, even if the shielding function of either the finger 30 or the packing 40, and either one of the shielding functions, the sudden drop of the radio wave shielding performance of the test box 1 for an electronic device can be prevented by the other shielding function.

In addition, the finger 30 may be attached directly to the opening edge portion 12 of the test box body 10 without interposing the mounting plate 31. In addition, the packing 40 may be attached to the side of the opening edge part 12 of the test box main body 10.

[Third Embodiment]

FIG. 8A is a schematic diagram showing a state where the door is opened, and FIG. 8B is a schematic diagram showing a state where the door is closed.

The radio wave shielding structure which concerns on 3rd Embodiment is the opening edge part 12 of the test box main body 10 which is a contact part of the test box main body 10 and the door 20, as shown to Fig.8 (a). ) And an insertion groove 60 formed in the peripheral portion 22 of the door 20, the finger 30 is inserted into the insertion groove 60 of the peripheral portion 22 of the door 20. The packing 41 is mounted on the bottom of the insertion groove 60, and the packing 42, 42 is opened on the inner circumferential side and the outer circumferential side of the insertion piece 50. Are attached to each).

The finger 30 is the same as that used for the radio wave shielding structure which concerns on 1st, 2nd embodiment, and is attached to the perimeter of the periphery 22 of the door 20. As shown in FIG.

The packings 41 and 42 cover the sponge material which has elasticity (cushionability) with the conductive fabric similarly to the packing 40 used by the electromagnetic wave shielding structure which concerns on 1st, 2nd embodiment, The size differs. .

The insertion piece 50 is a mounting portion made of metal (for example, made of aluminum, made of aluminum alloy, etc.) formed around the entire circumference of the opening edge portion 12 of the test box body 10. This insertion piece 50 is integrated with the panel 111 (refer FIG. 2-FIG. 4) which comprises the test box main body 10 (housing 110), as shown to Fig.8 (a). It may be formed, or may be formed by fixing a metal plate (which may be an L-shape in cross section or a convex shape in cross section) by welding or the like around the entire periphery of the opening edge portion 12 of the test box body 10. And packing 42 and 42 are attached to the both sides of this insertion piece 50 over the perimeter of the opening edge part 12 of the test box main body 10. As shown in FIG.

The insertion groove 60 is a recess formed around the periphery of the periphery 22 of the door 20, and the insertion piece 50 is inserted when the door 20 is closed. The packing 41 is attached to the bottom part of this insertion groove 60 over the perimeter of the periphery 22 of the door 20. As shown in FIG.

In the radio wave shielding structure according to the third embodiment having such a configuration, as shown in FIG. 8B, when the door 20 is closed, the insertion piece 50 is inserted into the insertion groove 60. In order to form a radio wave diffraction structure, radio waves to invade from the contact portion between the test box body 10 and the door 20 cause diffraction loss inside the insertion piece 50 or the insertion groove 60.

In addition, when the door 20 is closed, the packing 41 elastically contacts the front end of the insertion piece 50 so that the gap between the insertion piece 50 and the insertion groove 60 is surely closed, and the packing ( Since the gap between the test box body 10 and the door 20 is reliably closed by 42 and 42 elastically contacting both sides of the insertion groove 60, the test box body 10 and the door 20 are Propagation to invade from the contact portion causes diffraction loss in the packing 41, 42, 42.

Moreover, when the door 20 is closed, the finger 30 elastically contacts the opening edge part 12 of the test box main body 10, and the clearance between the test box main body 10 and the door 20 will be reliably. Since it is occluded, the radio waves to invade from the contact portion of the test box body 10 and the door 20 cause diffraction loss in the finger 30.

Therefore, the radio wave shielding structure which concerns on 3rd Embodiment is a test box main body by the diffraction loss effect of the finger 30, the packing 41, 42, 42, the insertion piece 50, and the insertion groove 60 mutually. The radio waves to intrude from the contact portion between the 10 and the door 20 can be shielded more effectively.

Moreover, in 3rd Embodiment, the structure which formed the insertion piece 50 in the opening edge part 12 of the test box main body 10, and the insertion groove 60 was formed in the periphery part 22 of the door 20. As shown in FIG. However, it is not limited to this. That is, the insertion piece 50 may be formed in the peripheral part 22 of the door 20, and the insertion groove 60 may be formed in the opening edge part 12 of the test box main body 10. FIG.

In addition, in 3rd Embodiment, although the packing 41 and 42 were attached to the both sides of the insertion piece 50, and the bottom part of the insertion groove 60, it is not limited to this, For example, insertion piece It is good also as a structure provided only in the both sides of 50, and may be comprised only in the bottom part of the insertion groove 60. In addition, the finger 30 may be attached to the side of the opening edge part 12 of the test box main body 10.

[4th Embodiment]

Fig. 9A is a schematic view showing a state in which the door is opened, and Fig. 9B is a schematic view showing a state in which the door is closed.

In the radio wave shielding structure according to the fourth embodiment, the fingers 32 and 32 are attached to the inside of the insertion groove 60. More specifically, the fingers 32 and 32 are formed of the insertion groove 60. The point attached to the whole periphery of each opposing side surface inside each differs from the electromagnetic wave shielding structure which concerns on 3rd Embodiment.

The finger 32 is a circular arc-shaped spring member made of metal pressed in the vertical direction of the mounting surface. Like the finger 30, the finger 32 has a shielding property of radio waves, but differs in size from the finger 30.

The radio wave shield structure which concerns on 4th Embodiment which has such a structure adds to the effect of the radio wave shield structure which concerns on said 3rd Embodiment, as shown to FIG. ), The fingers 32 and 32 elastically contact the insertion piece 50 so as to be fitted from both sides. As a result, the gap between the insertion piece 50 and the insertion groove 60 is surely closed, so that radio waves intended to invade from the contact portion between the test box body 10 and the door 20 are fingers 32 and 32. Diffraction loss occurs, and as a result, it is possible to more effectively shield the radio waves to invade from the contact portion of the test box body 10 and the door 20.

[Fifth Embodiment]

FIG. 10A is a schematic diagram showing a state in which the door is opened, and FIG. 10B is a schematic diagram showing a state in which the door is closed.

In the radio wave shielding structure according to the fifth embodiment, the packing 41 is not provided at the bottom of the insertion groove 60 and the point at which the finger 33 is attached to the entire circumference of the insertion piece 50 is provided. It differs from the electromagnetic wave shielding structure which concerns on 3rd Embodiment.

The finger 33 is a leaf spring member formed by bending a substantially equivalent portion of the comb teeth of a strip-shaped metal plate forming a comb shape in a substantially triangular shape as viewed in cross section, and is pressed in the vertical direction of the mounting surface, and propagated. Has shielding properties. Moreover, the clip part 33a for attaching to the insertion piece 50 is formed in the finger 33. As shown in FIG. This finger 33 is attached to the insertion piece 50 by the clip part 33a clamping the insertion piece 50. As shown in FIG.

In the radio wave shielding structure according to the fifth embodiment having such a configuration, as shown in FIG. 10B, when the door 20 is closed, the insertion piece 50 is inserted into the insertion groove 60. In order to form a radio wave diffraction structure, radio waves to invade from the contact portion between the test box body 10 and the door 20 cause diffraction loss inside the insertion piece 50 or the insertion groove 60.

In addition, when the door is closed, the packing 42, 42 elastically contacts both sides of the insertion groove 60, while the finger 30 is elastically open to the opening edge 12 of the test box body 10. Since the gap between the test box body 10 and the door 20 is reliably closed, radio waves intended to intrude from the contact portion between the test box body 10 and the door 20 are packed 42 and 42. And cause diffraction loss at the finger 30.

In addition, when the door 20 is closed, the distal end portion 33b and the second bent portion 33d of the finger 33 elastically contact the inner side surface of the insertion groove 60, and at the same time, Since the bending portion 33c elastically contacts the bottom of the insertion groove 60, the gap between the insertion piece 50 and the insertion groove 60 is surely closed, so that the test box body 10 and the door are closed. Propagation to invade from the contact portion of (20) causes diffraction loss at the finger (33).

Therefore, the radio wave shielding structure which concerns on 5th Embodiment is a test box main body by the diffraction loss effect of the fingers 30 and 33, the packing 42 and 42, the insertion piece 50, and the insertion groove 60 mutually. The radio waves to intrude from the contact portion between the 10 and the door 20 can be shielded more effectively.

As mentioned above, although embodiment of the electromagnetic wave shielding structure was described, embodiment of a radio wave shielding structure is not limited to this. About a specific structure, it can change suitably in the range which does not deviate from the meaning of this invention. For example, it is good also as a structure which combined at least two of said 1st-5th embodiment.

In addition, in said 1st, 2nd embodiment, the structure in which one packing 40 is attached to the periphery part 22 (or the opening edge part 12 of the test box main body 10) of the door 20 ( 6 and 7), but the present invention is not limited thereto. For example, the structure may be mounted so that two packings may be arranged in duplicate with respect to the intrusion direction of the radio wave to be intruded from the contact portion between the test box body 10 and the door 20 (not shown). Naturally, you may mount so that a packing may be arrange | positioned in triple or more. The same applies to the packings 41 and 42 of the third to fifth embodiments.

In addition, in the above-described third to fifth embodiments, the configuration in which one finger 30 is attached to the peripheral portion 22 (or the opening edge portion 12 of the test box body 10) of the door 20 is provided. 8 to 10], but the present invention is not limited thereto. For example, the structure may be mounted so that two fingers may be arranged in double with respect to the intrusion direction of the radio wave to be intruded from the contact portion between the test box body 10 and the door 20 (not shown). Naturally, you may attach so that a finger may be arrange | positioned in triple or more. The same applies to the first and second embodiments.

In addition, although the said 3rd-5th embodiment was set as the structure (refer FIG. 8 thru | or 10) which forms one insertion piece 50 and the insertion groove | channel 60, respectively, it is not limited to this. For example, it is good also as a structure formed so that it may become double or more with respect to the penetration direction of the radio wave to intrude from the contact part of the test box main body 10 and the door 20. FIG.

Finally, one Embodiment of this invention demonstrates operation | movement of the test box 1 for electronic devices shown in FIGS. 1-4 (with the radio wave shielding structure concerning 1st Example shown in FIG. 6). The electronic device test method according to the present invention will be described with reference to the drawings as appropriate.

First, as shown in FIG. 1, the door 20 is opened, the electronic device P is placed inside the test box body 10, and an insertion passage formed in the fixture 174 of the mounting unit 170. 174a (see FIG. 3) is inserted and fixed to the inside of the test box body 10. In addition, a connector (not shown) of the cable 180 is connected to the electronic device P. FIG.

Next, when the door 20 is closed, as shown in FIG. 6, the finger 30 elastically contacts the opening edge portion 12 (the bent portion 13) of the test box body 10. At the same time, the packing 40 elastically contacts the opening edge 12 of the test box body 10. As a result, the gap between the test box main body 10 and the door 20 is reliably closed by the finger 30 and the packing 40, and is intruded from the contact portion between the test box main body 10 and the door 20. Since the radio waves to be produced cause diffraction loss in the finger 30 or the packing 40, a high radio wave shielding environment can be realized.

Then, for example, by turning on a test start switch (not shown) or the like, an electric signal is transmitted from the radio wave transmitting / receiving unit (not shown) to the antenna 160, and radio waves are transmitted from the antenna 160. Radiated. The test of the operation of the electronic device P is performed by detecting the reception state of the radio wave of the electronic device P in the test unit 190 (see FIG. 2) while radiating the radio wave from the antenna 160. The test unit 190 detects the reception state of the radio wave of the electronic device P, and determines whether the electronic device P is operating normally.

At this time, the radio wave transmitting / receiving unit (not shown) may perform the test by changing the intensity, frequency band, and the like of the radio wave radiated from the antenna 160.

If it is determined that the steady state, the door 20 is opened to change the direction of the antenna 160, then the door 20 may be closed to test other polarized planes (horizontal wave and vertical wave).

In addition, when it determines with it being normal, the door 20 is opened, the position of the holding fixing jig 172 is changed, it is fixed to the fixing plate 171, the distance with the antenna 160 is changed, and the electronic device P propagates A test may be made as to whether it can be received normally.

The distance between the antenna Pa (see FIG. 3) of the electronic device P and the antenna 160 is set so as to be equal to or greater than the wavelength? Of the radio waves emitted from the electronic device P or the antenna 160. It is preferable to set it to 2 or more. This makes it possible to arrange the antenna Pa of the electronic device P in the region of the far-field electromagnetic field, and the electronic device P can be tested at a position where the electric field strength is stabilized. Therefore, the electronic device P The test of can be performed precisely.

Here, the region of the far field means that the region where the wave impedance becomes equal to the wave impedance Z0 of the space. Radio waves radiated from the antenna 160 carry propagation near the plane wave in this region.

The above is a series of operation | movement of the test box 1 for electronic devices, and an electronic device test method.

According to the test box 1 for electronic devices described above, the fingers 30, 32, 33, the packings 40, 41, 42, and the insertion pieces are placed in contact portions between the test box body 10 and the door 20. Since the multiple radio wave shielding structure which consists of 50, the insertion groove | channel 60, etc. is provided, the radio wave to invade from the exterior of the test box main body 10 can be shielded effectively. Moreover, the test of the electronic device P can be performed precisely by using such a test box 1 for electronic devices.

As mentioned above, although one Embodiment of this invention was described, Embodiment of this invention is not limited to this. About a specific structure, it can change suitably in the range which does not deviate from the meaning of this invention, For example, the following changes are possible.

In the above-mentioned embodiment, although the mobile telephone was shown and demonstrated as the electronic apparatus P, the electronic apparatus P used as the test object of this invention is not limited to a mobile telephone. For example, a PDA (Personal Digital Assistance) that transmits and receives radio waves and a notebook type personal computer having a wireless LAN (Local Area Network) function may be used as a mobile phone. Moreover, the precision measuring apparatus, medical apparatus, etc. which are not preferable to be influenced by external radio waves may be sufficient. In addition, it may be a household electrical appliance, a medical apparatus, or the like, which is undesirable to radiate radio waves of a predetermined value or more to the outside. In this case, it goes without saying that the shape and size of the mounting unit 170, or whether the mounting unit 170 is provided is appropriately set according to the electronic device to be tested.

In addition, the test box main body 10 is not limited to the above-mentioned embodiment, For example, the large-sized room (test room) which a tester, such as an electric wave dark room, can enter and leave inside may be sufficient. Such a test chamber may be formed of a metal housing similarly to the test box body 10, or may be, for example, a concrete structure having shielding properties of radio waves.

In the above-described embodiment, the housing 110 is formed by welding a plurality of metal panels 111 to a frame (not shown) serving as a skeleton, but the present invention is not limited thereto. It is good also as a structure which can be assembled and disassembled by which a panel is assembled by a bolt etc., and is formed. Moreover, in the case of such a structure, it is preferable to interpose the filler which has the shielding of an electric wave in the clearance gap of a some metal panel. Thereby, the shielding of the radio wave of the housing (test box main body) can be kept favorable. As a filler with shielding of radio waves, for example, at least one of the upper and lower surfaces is insulated with a lossy layer (for example, a carbon resistance sheet, a metal thin film) insulated with an insulating layer (for example, paper, an adhesive tape which also serves as an adhesive layer). A sheet body for electromagnetic shielding bonding which has a resistance sheet, a heat ray blocking film, etc.) can be used. Specifically, Lumidion (registered trademark) IR (Toyo Service Co., Ltd.) etc. can be used, for example.

In the above embodiment, the housing 110 is made of metal to increase the shielding property, rigidity, or the like of the radio wave. However, the housing 110 is not limited to this, and the housing may be formed of, for example, a plate having shielding of the radio wave.

In the above-mentioned embodiment, although the cable 180 (cable for electric signals) passes through the inside of the EMI duct 140, it is not limited to this.

Since the electric signal cable conducts noise through its interior, electromagnetic interference occurs. In the above-described embodiment, the cable 180 is covered with the noise absorber 181 (see FIG. 2), whereby the radiation and transmission and transfer of noise from the cable 180 are suppressed. It is difficult in reality. Therefore, in order to further improve the radio wave shielding performance of the test box main body 10, for example, an optical signal cable (optical cable) with a very low noise may be passed inside the EMI duct 140.

11 is a horizontal cross-sectional view showing another embodiment of a test box for an electronic device. The cables 182 and 186 are cables for electric signals, and the conversion units 183 and 185 are known units capable of converting electrical signals and optical signals to each other.

As shown in FIG. 11, the electronic device P and the test unit 190 are connected via a cable 182, a conversion unit 183, an optical cable 184, a conversion unit 185, and a cable 186. Connected.

Specifically, the other end of the cable 182 having a connector (not shown) that can be detachably connected to the electronic device P at one end thereof is provided inside the housing 110 (test box body 10). It is connected to the installed conversion unit 183, and one end of the optical cable 184 is connected to this conversion unit 183. The optical cable 184 is wired so that the predetermined length (for example, 100 mm or more) passes through the inside of the EMI duct 140. The other end of the optical cable 184 is connected to a conversion unit 185 provided outside the housing 110 (test box body 10), and one end of the cable 186 is connected to the conversion unit 185. The other end thereof is connected to the test unit 190. In addition, the conversion units 183 and 185 and the optical cable 184 can be connected through, for example, a USB connector, an RS232C connector, a LAN connector, and the like.

Here, when the conversion units 183 and 185 are devices which do not have an internal power supply, for example, it is necessary to separately supply electric power from an external power supply (for example, a power outlet). At this time, for the conversion unit 185 provided outside the housing 110, for example, a power cable connected to an external power source can be directly connected to supply power (not shown). However, since such a power supply cable conducts noise through the inside thereof, electromagnetic interference occurs when the power supply cable is directly connected to the inside of the housing 110 and connected to the conversion unit 183.

Therefore, as shown in FIG. 11, it is preferable to supply power to the conversion unit 183 through the low pass filter 187 provided through the side wall of the housing 110. Specifically, in the outside of the housing 110, while connecting the power cable 188 connected to the low pass filter 187 to an external power source (not shown), inside the housing 110, The power supply cable 189 connected to the conversion unit 183 is connected to the low pass filter 187 to supply power to the conversion unit 183.

The low pass filter 187 is a filter which passes only the low pass frequency among the filters for blocking signals other than a specific frequency. Such low pass filter 187, for example, when the external power source is a power outlet, passes a frequency range of 50 Hz or 60 Hz and at the same time a frequency range of the frequency band used by the electronic device P to be tested. It is preferable to block the. For example, when the electronic device P is a mobile phone, it is preferable to block the frequency range of 0.8 to 2.4 GHz. In addition, the external power supply which supplies electric power to the conversion unit 183 is not limited to a power outlet, For example, the battery etc. which are provided in the inside of the housing 110 may be sufficient.

As mentioned above, electromagnetic interference can be prevented favorably by wiring the optical cable 184 so that the predetermined length (for example, 100 mm or more) of the optical cable 184 passes through the inside of the EMI duct 140. . Thereby, since the radio wave shielding performance of the test box main body 10 (test box 1 for electronic devices) can be improved further, the test of the electronic device P can be performed more precisely. In addition, when all the cables which conduct through the inside of the EMI duct 140 and the inside of the housing 110 are optical cables, it is good also as a structure which does not provide the EMI duct 140. FIG.

When the electronic device P and the test unit 190 are both devices capable of directly transmitting and receiving optical signals, the electronic device at one end without installing the cables 182 and 186 and the conversion units 183 and 185. It is good also as a structure which directly connects the electronic device P and the test unit 190 by the optical cable 184 provided with the connector (not shown) which can be detachably connected to (P) (not shown).

In the above-described embodiment, the honeycomb filter 150 (or mesh filter 155) for supply / exhaust is provided on the back of the test box body 10 (housing 110). Is not limited to these. For example, a structure in which a plurality of fine through holes are formed on the back of the test box body (housing) in which the inner diameter and the length (panel thickness) are set (designed) to function as a waveguide that does not transmit and carry radio waves longer than a predetermined wavelength. You may make it. Moreover, the structure which fixes such a plate provided with such a some micro through hole from the inside through the mounting frame and the gasket which has insulation resistance in the through hole (refer FIG. 4) formed in the back surface of a test box main body (housing). You may make it.

In the above-mentioned embodiment, although it was set as the structure provided with one filter for supply / exhaust (honeycomb filter 150 or mesh filter 155) in the back of the test box main body 10 (housing 110), It does not restrict | limit, For example, it is good also as a structure provided with the at least two filter for intake and exhaust. In this case, all of the same types of filters may be used, or different types of filters may be used in combination. Moreover, you may attach an exhaust fan (not shown) to the exhaust through-hole formed in the exhaust filter or the test box main body (housing). Moreover, in order to further improve the electromagnetic wave shielding performance of the test box for electronic devices, it is not necessary to provide the filter for air supply and exhaust.

In the above embodiment, the rotation adjustment of the antenna 160 loosens the connector 161 to rotate the antenna waveguide 162, changes the direction of the antenna 160, and then tightens the connector 161. Although the waveguide 162 for antennas (antenna 160) is manually fixed, it is not limited to this. For example, it is good also as a structure performed mechanically combining a well-known power mechanism, a control mechanism, etc.

In the above-described embodiment, the fastener 174 is detachably attached to the mounting plate 173, but the configuration is not limited thereto, and the fastener may be rotatably mounted to the mounting plate. In this case, the adjustment of rotation of the fixture may be carried out mechanically.

In the above embodiment, the holding fixing jig 172 is configured to be moved in stages by the plurality of bolt holes 171a and the bolts B formed in the fixing plate 171, but the present invention is not limited thereto. For example, the holding fixing jig may be configured to move steplessly along the rail provided on the fixing plate. According to this, the distance of an antenna and a holding fixing jig (electronic device) can be adjusted easily.

In the above embodiment, as shown in FIGS. 1, 2, and 4, the window 210 is formed in the door 20, but the window 210 is formed in the test box body without being limited thereto. It is good also as a structure to make. In addition, you may form a plurality of doors and windows, respectively. In addition, in the case where the radio wave shielding performance of the test box for electronic equipment is to be further improved, a window may not be formed.

In the above-described embodiment, the packings 40, 41, and 42 are illustrated by coating the sponge material with the conductive fabric, but the packing usable in the present invention is not limited thereto. For example, you may use the packing which consists of rubber (silicone rubber, chloroprene rubber etc.) (so-called conductive rubber) which mixed electroconductive fine particles (metal fine particles, carbon black, etc.). In addition, a gasket coated with a metal mesh (for example, a soft shield (Taiyo Kanaami Kabushiki Kaisha)) may be used, or a metal mesh bundle may be used.

In the above embodiment, the electronic device test method determines whether the electronic device P can normally receive the radio wave by radiating the radio wave from the antenna 160 to the electronic device P. Although was demonstrated, the electronic device test method is not limited to this. For example, various instructions are transmitted from the test unit 190 to the electronic device P, and the electronic device P (antenna Pa). 3, the radio wave is transmitted to the antenna 160, and the radio wave received by the antenna 160 is measured by a radio wave transmission / reception unit (not shown) to determine whether the electronic device P is operating normally. good.

[Sixth Embodiment]

EMBODIMENT OF THE INVENTION Hereinafter, 6th Embodiment of this invention is described, referring drawings suitably. 12 is a front view that includes some cross-sectional portion illustrating a test box for an electronic device.

As shown in FIG. 12, the test box 501 for electronic devices includes the test box main body 510 which has the electronic device P inside, and has the shielding of the radio wave from the outside, and the said test box main body. A window 520 which is formed in the door 512 constituting a part of the 510 and is provided with a glass plate 521 having a shielding of radio waves and a transparency to visible light, is mainly provided, and the interior of the test box body 510 is provided. And a resin layer (resin film 540 or resin plate) constituting a radio wave absorber 530 and a bright insulating layer fixed to the surface of the radio wave absorber 530. Here, the insulating layer means a resin film 540 or a resin plate made of a material having a volume resistivity of 10 ⁶ Ωcm or more.

FIG. 13 is a II-II cross-sectional view of FIG. 12, FIG. 14 is a longitudinal cross-sectional view of a test box for an electronic device, and FIG. 15 is a IV-IV cross-sectional view of FIG. 12.

As shown in FIGS. 13-15, the test box main body 510 is the opening / closing door 512 equipped with the metal housing 511 and the hinge H in the front side of the housing 511 via the hinge H. As shown to FIG. In the right side (refer FIG. 12) seen from the front of the door 512, the window 520 in which the glass plate 521 which has the shielding of an electric wave and the permeability to visible light is provided is formed.

In addition, the test box body 510 includes a radio wave absorber 530 attached to an inner circumferential surface thereof, a resin film 540 fixed to a surface of the radio wave absorber 530, an LED lamp 550 provided on an upper wall, and sidewalls. And an antenna 560 provided on the back, an EMI duct 570 provided on the back, a honeycomb filter 580 made of metal, and a mounting unit 590 to which the electronic device P is fixed.

As shown in FIGS. 13-15, the housing 511 welds a plurality of metal panels 511a to a frame (not shown) which becomes a frame | skeleton, and forms the substantially rectangular parallelepiped box shape which opened the front side. Formed. Since the housing 511 is formed of a metallic panel 511a and a frame (not shown), the housing 511 has a predetermined rigidity, increases its durability, and has a shielding against radio waves from the outside. In addition, since the plurality of panels 511a and the frame (not shown) are joined by welding, the sealing property of the housing 511, that is, the shielding of radio waves is improved.

The metal forming the panel 511a and the frame (not shown) is not particularly limited in the present invention, and not only a pure metal (for example, aluminum, steel, copper, etc.) but also an alloy (for example, aluminum alloy, stainless steel). Etc.) may be sufficient. In addition, when the panel 511a and the frame (not shown) are formed of aluminum or an aluminum alloy, the housing 511 can be reduced in weight while maintaining desired rigidity. In addition, since aluminum and an aluminum alloy have unique luster, the housing 511 becomes excellent in aesthetics.

As shown in FIG. 13, the door 512 is formed of the metal panel 512a, and the window 520 is formed in the right side (refer FIG. 12) from the front of this panel 512a. The panel 512a is rotatably attached to the side surface of the housing 511 via the hinge H, and the door 512 is opened and closed appropriately. In addition, the metal which forms the panel 512a is not specifically limited in this invention, Not only a pure metal (for example, aluminum, steel, copper, etc.) but an alloy (for example, aluminum alloy, stainless steel, etc.) may be sufficient.

A frame-shaped packing S having shielding of radio waves is provided in the contact portion between the housing 511 (panel 511a) and the door 512 (panel 512a) when the door 512 is closed. Conductive rubber packing). Thereby, the shielding of the radio wave of the test box main body 510 when the door 512 is closed can be maintained suitably.

As shown in FIG. 13, FIG. 15, the window 520 is provided with the rectangular glass plate 521 which has transparency to visible light. Thereby, since the inside of the test box main body 510 can be visually confirmed from the outside through the window 520 (glass plate 521), while testing the electronic device P, for example, it propagates The presence or absence of the lighting of the incoming lamp of the electronic device P by having received this can be confirmed.

Moreover, the glass plate 521 has the reflectivity (blocking property) of an electric wave in order to prevent the communication of the electric wave through the window 520 (glass plate 521). Thereby, the shielding of the radio wave of the test box main body 510 can be maintained suitably.

Such a glass plate 521 can be realized by forming a thin film of a transparent oxide semiconductor on at least one surface. The transparent oxide semiconductor is a semiconductor material having both transparency and conductivity, and specific examples thereof include indium tin oxide (ITO), zinc oxide, titanium oxide, and tin oxide. In addition, formation of the thin film of a transparent oxide semiconductor can be performed by well-known methods, such as a sputtering method, a vacuum vapor deposition method, and an ion plating method, for example.

Among such transparent oxide semiconductors, it is preferable to use indium tin oxide (hereinafter referred to as ITO) or zinc oxide. In particular, ITO can be suitably used because of its low resistance, high visible light transmittance and durability, and easy film formation and patterning.

Below, the specific example of the structure of the glass plate 521 in which the ITO film | membrane was formed in the surface of plate glass is demonstrated easily.

16 (a) to 16 (c) are cross-sectional views showing structural examples of glass plates.

In the glass plate 521a illustrated in FIG. 16A, an ITO film 712 is formed on one surface of the plate glass 711. The resistance value of the ITO film 712 is preferably 2 Ω / □ or less, for example, 1 to 2 Ω / □ (the same applies to the glass plates 521B and 521C to be described later).

In the glass plate 521B illustrated in FIG. 16B, ITO films 712 and 712 are formed on both surfaces of the plate glass 711. When the ITO films 712 and 712 are formed on both surfaces of the plate glass 711, the resistance value of the glass plate 521B becomes the same value as the case where the resistance was connected in parallel. That is, when the ITO films 712 and 712 of 1? /? Are formed on both surfaces of the plate glass 711, the resistance value of the glass plate 521B is 0.5? / ?. In addition, by forming the ITO films 712 and 712 having a resistance value of 2 Ω / square or less on both surfaces of the plate glass 711, the shielding performance of radio waves with a frequency of 1.2 to 2.4 GHz can be made 60 Hz or more.

According to the glass plates 521A and 521B described above, high radio wave shielding performance can be realized. By the way, in order to form a thick ITO film in the surface of the plate glass 711, and to make small the resistance value, there exists a fixed limit. Therefore, when high shielding performance of a radio wave is required, it is preferable to use the glass plate 521C shown in FIG.16 (c). The glass plate 521C attaches a glass plate 521a (a surface on which the ITO film 712 of the glass plate 521a is not formed) and the glass plate 521B.

The glass plate 521 described above preferably has a transmittance of visible light having a wavelength of 400 to 700 nm of 50% or more. According to this, it becomes possible to visually confirm the electronic device P inside the test box main body 510 suitably.

Moreover, it is preferable that the glass plate 521 has the shielding performance of the electric wave of the frequency of 1.2-2.4GHz. Here, the band of frequencies 1.2 to 2.4 GHz is approximately equivalent to the frequency band of mobile phones (second generation and third generation), which are most frequently used as electronic devices P, which are the test targets of the test box 501 for electronic devices. . Therefore, according to this, it becomes possible to appropriately shield the electric wave of the frequency band of the electronic device P (especially mobile telephone).

It is preferable to form a protective film (not shown) of transparent resin at least on the surface on which the thin film of the transparent oxide semiconductor was formed among the surfaces (both surfaces) of the glass plate 521. According to this, since the thin film of a transparent oxide semiconductor can be protected from peeling-off, shaving peeling, etc., for example, the penetration of the radio wave from the part from which the thin film of the transparent oxide semiconductor peeled-off can be prevented, and the test box body ( The shielding of the radio wave of the 510 can be appropriately maintained. As such a transparent resin, silicone resin, polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyethylene (PE), etc. are mentioned, for example.

The glass plate 521 is fixed by the frame 512b, as shown to FIG. 13, FIG. The frame 512b is a metal frame member and is fixed to the panel 512a by welding or the like so as to cover the periphery of the glass plate 521. The metal forming the frame 512b is not particularly limited in the present invention, and may be an alloy (for example, aluminum alloy, stainless steel, etc.) as well as pure metal (for example, aluminum, steel, copper, and the like).

In the contact portion between the glass plate 521 and the frame 512b, a frame-shaped packing (not shown) (for example, conductive rubber packing or the like) having shielding of radio waves is provided. Thereby, since the shielding of the radio wave in the peripheral part of the window 520 (glass plate 521) can be ensured, the shielding of the radio wave of the test box main body 510 can be maintained suitably.

In addition, when the radio wave radiated from the electronic device P, the antenna 560, or the like is irradiated directly to the window 520 (glass plate 521), the radio wave is formed on the surface of the window 520 (glass plate 521). Since the resonance phenomenon of radio waves is reflected, the window 520 is preferably installed at a position where radio waves radiated from the electronic device P, the antenna 560, or the like are not irradiated as much as possible.

The electromagnetic wave absorber 530 is a structure based on a known method (λ / 4 type) that absorbs radio waves, and as shown in FIGS. 13 to 15, a test box body 510 (housing 511). And the door 512 so as to cover the inner surface of the electronic device P, the antenna 560, and the like and pseudo-absorb radio waves radiated from the inner surface of the test box body 510 without reflecting them. That is, the radio wave absorber 530 prevents the radio waves radiated from the electronic device P, the antenna 560, and the like from resonating with the radio waves reflected from the inner surface of the test box body 510.

Fig. 17 is a sectional view showing the structure of the lambda / 4 type electromagnetic wave absorber.

As shown in FIG. 17A, the electromagnetic wave absorber 530 is disposed on the surface (inner circumferential surface) of the panel 511a (or the panel 512a), and also on the surface thereof. And a resistive film sheet 532 having a function of transmitting a part of radio waves, and a protective film 533 disposed on the surface thereof to protect the resistive film sheet 532.

The spacer 531 has a space between the resistive film sheet 532 and the panel 511a (or the panel 512a) when the wavelength of radio waves emitted from the electronic device P, the antenna 560, or the like is λ. It is for setting to λ / 4, and has a thickness D of λ / 4. The spacer 531 may be formed of any material as long as it has a permeability of radio waves, and may be formed of, for example, foamed styrol. In the case where the spacer 531 is made of foamed styrol, the thickness D can be easily adjusted.

The resistive film sheet 532 is a thin sheet adjusted so that its surface resistance value is approximately equal to the impedance of free space (376.7?). As such a resistive film sheet 532, the thing which apply | coated the carbon conductive coating material to the appropriate base sheet, the film formed by adjusting the resistance value of an ITO film, etc. can be used, for example.

The protective film 533 is laminated on the surface of the resistive film sheet 532, and protects the surface of the resistive film sheet 532. Such a protective film 533 can be formed of, for example, PET, PC, polyacetal (POM), PVC, PE, or the like.

Here, with reference to FIG. 17A, the mechanism of radio wave absorption by the radio wave absorber 530 will be described. In addition, here, the case where the radio wave W1 radiated | emitted from the electronic device P, the antenna 560, etc. enters from the perpendicular direction of the protective film 533 is demonstrated here.

Of the radio waves W1 (wavelength λ) that pass through the protective film 533, the transmission of the resistance film sheet 532 is called radio wave W2, and the reflection of the resistance film sheet 532 is radio wave W3. It is called. The radio wave W2 that has passed through the resistive film sheet 532 passes through the spacer 531 and is then reflected by the panel 511a (or the panel 512a) to become the radio wave W4. The phases of the radio waves W3 and W4 are inverted at the time of reflection on the resistive film sheet 532 and the panel 511a (or the panel 512a), respectively.

The radio wave W4 reflected by the panel 511a (or panel 512a) and reaching the resistive film sheet 532 is spaced from the spacer 531 with respect to the radio wave W3 reflected by the resistive film sheet 532. 2 times the thickness D, i.e., " λ / 4 × 2 = λ / 2 ", the phase of the radio wave W3 and the phase of the radio wave W4 are reversed. As a result, the electric wave W3 and the electric wave W4 cancel each other, and as a result, the electric wave W1 incident on the resistive film sheet 532 is pseudo-absorbed.

In the radio wave absorber 530, if the distance between the resistive film sheet 532 and the panel 511a (or panel 512a) can be set to? / 4, the thickness D of? / 4 It is not necessary to provide the spacer 531 having a. However, it is necessary that radio waves can be transmitted between the resistive film sheet 532 and the panel 511a (or the panel 512a).

By providing such a radio wave absorber 530, it is possible to effectively absorb the radio waves radiated from the antenna Pa (see FIG. 14), the antenna 560, and the like of the electronic device P, thereby preventing the resonance phenomenon of radio waves The test of the electronic device P can be performed precisely.

In addition, by making the electromagnetic wave absorber 530 a lambda / 4 type electromagnetic wave absorber having a simple structure and easy design, it is optimal depending on the wavelength? Of the radio wave radiated inside the test box body 510. Since the radio wave absorber 530 having the radio wave absorption capability can be designed, the radio wave radiated from the inside of the test box body 510 can be more effectively absorbed.

As shown in FIGS. 13-15, the resin film 540 is the surface of the electromagnetic wave absorber 530 (the surface of the protective film 533). 17 (a) reference]. Resin which forms the resin film 540 will not be specifically limited if it is a resin which shows bright color and transmits a radio wave. By providing such a resin film 540, since the inside of the test box main body 510 becomes bright, the electronic device P inside the test box main body 510 can be visually confirmed satisfactorily.

Here, bright color means the color whose brightness prescribed | regulated to Munsell colorimeter (JIS Z8721) exists in the range of 8.0-10.0. Specifically, white, yellow, pale yellow, light blue, pale green, yellow green, orange, pale orange, etc. are mentioned, for example. In particular, the brightness in the Munsell color system is preferably in the range of 8.5 to 10.0, and more preferably in the range of 9.0 to 10.0.

In addition, it is not preferable to simply apply a bright paint on the surface of the radio wave absorber 530. That is, when the coating material is applied to the surface of the radio wave absorber 530, the surface resistance value of the radio wave absorber 530 changes according to the components, moisture, and the like contained in the paint, and does not match the impedance of the free space (376.7Ω). Will not. This is undesirable because the reflection of the radio waves occurs on the surface of the radio wave absorber 530, which should originally transmit radio waves, and the resonance phenomenon of radio waves occurs inside the test box body 510.

However, the use of paints having excellent insulation properties such as polyurethane resin paints, polyester resin paints and varnish paints can suppress reflection of radio waves.

As resin which forms the resin film 540, it is resin showing a bright color, for example, Teflon (trademark), PVC, PE, polypropylene (PP), polystyrene (PS), PET, POM, polycarbonate (PC ), Polyamide (PA), polyphenylene ether (PPE), polyimide (PI) and the like can be used.

Moreover, even if it does not show itself a bright color, it can use if it is resin which will show a bright color by including a bright pigment. Examples of the bright pigment include titanium dioxide (white), barium sulfate (white), iron oxide (yellow), sulfur lead (yellow), ultramarine blue (blue), royal blue (blue), and the like. You may mix and use. As resin which can be used by including such a pigment, PVC, PE, PP, PS, PET, POM, PC, PA, PPE, PI etc. are mentioned, for example.

According to this, since it becomes possible to use not only resin which shows a bright color, but also transparent resin etc. by including a pigment of bright color, resin used as a raw material of the resin film 540 can be selected widely.

Moreover, resin which shows white (for example, the thing prescribed | regulated by Munsell color system is 9.5) or resin containing a white pigment is used among resin which shows the above-mentioned bright color or resin containing a light-colored pigment. It is desirable to. According to this, since the inside of the test box main body 510 can be appropriately brightened, the electronic device P inside the test box main body 510 can be visually confirmed favorably. The pigment may be a fluorescent pigment in addition to the white pigment. A fluorescent pigment is a pigment which starts an visible light of a specific wavelength when an electron is excited by irradiating an ultraviolet-ray, and this electron returns to a ground state. As an inorganic fluorescent pigment among fluorescent pigments, zinc sulfide, zinc silicate, calcium sulfide, strontium sulfide, calcium tungstate, calcium phosphate, etc. are mentioned, for example. By using the fluorescent pigment in this way, the brightness is increased, and visual confirmation inside the test box body 510 can be improved.

Such a resin film 540 is fixed to the surface of the radio wave absorber 530 with a pin, a screw, or the like (not shown). Here, when the resin film 540 is fixed to the surface of the electromagnetic wave absorber 530 with an adhesive, the electromagnetic wave absorber ( Since the surface resistance of 530 changes, the reflection of radio waves occurs on the surface of the radio wave absorber 530 which originally transmits radio waves, and the resonance phenomenon of radio waves occurs inside the test box body 510. Not.

However, the resonance phenomenon of this radio wave is designed using an adhesive having excellent insulation, such as a thermoplastic adhesive, a thermosetting adhesive, a photocurable adhesive, or the like, and for the bonding method, for example, bonding an insulating film to a spot. When the adhesion area is reduced to a minimum, the reflection of the radio wave can be suppressed, and the insulating film can be fixed to the surface of the radio wave absorber with little damage to the radio wave absorption characteristics of the radio wave absorber.

In the present embodiment, the resin film 540 is fixed to the surface of the radio wave absorber 530 with pins, screws, or the like. According to this, since the surface resistance value of the radio wave absorber 530 is not changed, the performance of the radio wave absorber 530 can be fully exhibited. In the case where the pin, screw, or the like is made of metal, radio waves may be reflected from the head portion. Therefore, a radio wave absorbing sheet having a radio wave absorption property is attached to the head portion of the pin or screw, or the pin or screw is made of an insulating material. It is preferable to form with (for example, resin).

The resin film 540 may also serve as the protective film 533 (see FIG. 17A) of the radio wave absorber 530. That is, as shown in FIG. 17B, the radio wave absorber 530 is disposed on the spacer 531 disposed on the surface (inner circumferential surface) of the panel 511a (or the panel 512a), and on the surface thereof. The structure may be provided with the resistive film sheet 532 arrange | positioned, and also the resin film 540 which is arrange | positioned on the surface, protects the resistive film sheet 532, and exhibits a bright color. According to this, it is not necessary to fix the resin film 540 on the surface of the protective film 533 of the radio wave absorber 530, and the structure of the test box main body 510 can be simplified, and at the same time material cost and manufacturing The cost can be kept down.

The LED (light emitting diode) lamp 550 is illumination for illuminating the inside of the test box body 510, and is provided on the upper wall of the housing 511 as shown in FIGS. 14 and 15. According to this, since the inside of the test box main body 510 can be made brighter, for example, during the test of the electronic device P, the electronic device P inside the test box main body 510 can be made brighter. It can be confirmed more visually.

Unlike the fluorescent lamp, since the LED lamp 550 hardly generates noise at the time of blinking, it is possible to precisely test the electronic device P, so that the illumination illuminating the inside of the test box main body 510. It can be used suitably as.

In addition, the mounting position, number, arrangement | positioning, etc. of the LED lamp 550 can be set suitably, It is not limited to the structure of this embodiment. In addition, the illumination which illuminates the inside of the test box main body 510 is not limited to an LED lamp, For example, a halogen lamp, an incandescent lamp, etc. may be sufficient.

The antenna 560 is an antenna for transmitting and receiving radio waves to and from the electronic device P. As shown in FIGS. 13 to 15, the antenna 560 is connected to the connector 561 fixed to the side wall of the housing 511. It is provided through the waveguide 562. One end of a cable (not shown) is connected to the antenna 560, and the cable (not shown) is led out to the outside of the test box body 510 through the antenna waveguide 562. The end is connected to a radio wave transmitting and receiving unit (not shown).

An electric wave transmission / reception unit (not shown) radiates an electric wave to the antenna 560, controls a frequency band or an output of the electric wave, or measures an electric wave from the electronic device P received by the antenna 560. Has the function to

The connector 561 is for fixing the waveguide 562 for antennas, and is provided in a state of being fixed to the side wall of the housing 511. The connector 561 is loosened to rotate the antenna waveguide 562, and the direction of the antenna 560 is changed. Then, the connector 561 is tightened to fix the antenna waveguide 562 again so that the antenna 560 is rotated. You can change the direction of).

As a result, the antenna 560 is arranged such that the polarization plane of the radio wave radiated from the antenna 560 and the polarization plane of the radio wave radiated from the antenna Pa (see FIG. 14) of the electronic device P are parallel or vertical. The axis of rotation can be adjusted.

In addition, a polarization surface means the surface which vibrates the wave of an electric field in an electromagnetic wave, and this electromagnetic wave in a fixed planar shape is called linear polarization. Radio waves radiated from a conventional antenna are linearly polarized waves.

As shown in FIGS. 13 and 15, the connector 561 may be provided with a connector 561 ′ separately (preliminary) on its left and right (horizontal directions). Thereby, since the waveguide 562 for antennas can be replaced in a desired position, the antenna 560 can be arrange | positioned in a desired position. In addition, these connectors 561 'may be provided in the up-and-down (vertical direction) of the connector 561, and may be provided 2 or more in the left and right up-down of the connector 561. As shown in FIG.

The antenna waveguide 562 is a metal waveguide formed by, for example, aluminum or an aluminum alloy, which is bent in a cylindrical shape or an L shape, and has shielding of radio waves. The antenna waveguide 562 communicates with the outside of the test box main body 510, and a cable (not shown) connected to the antenna 560 is wired to the hollow portion (inside). Further, a rectangular ground plate 563 is fixed to the tip of the antenna waveguide 562. In addition, the cross section of the waveguide 562 for antennas is not limited to circular, For example, it may be a polygon.

The specification of the waveguide 562 for antennas is set based on the wavelength of the radio wave which does not transmit and convey the inside. Specifically, the inner diameter and the length of the antenna waveguide 562 are set so that radio waves of a wavelength longer than a predetermined wavelength do not transmit and carry the inside thereof. Thereby, the shielding of the radio wave of the test box main body 510 can be maintained suitably.

In general, the waveguide has the same shape and dimensions (length) as the opening, and the longer the waveguide, the higher the shielding performance of radio waves. In addition, although depending on the shape of the opening of the waveguide, the smaller the area of the opening, the higher the limit frequency (predetermined frequency) of the radio waves capable of shielding the waveguide.

In general, when the antenna is installed in close proximity to a metal object, eddy currents flow through the metal object to cause reradiation of radio waves, and the interference may be affected by interference with appropriately radiated radio waves to the test provider. Therefore, as shown in FIG. 15, it is preferable to provide the magnetic sheet 564 on the side wall of the housing 511 near the antenna 560 (the antenna 560 includes the magnetic sheet 564 and the electronic device). Between (P)]. Thereby, the influence of re-emission of radio waves by the eddy current as described above can be reduced.

Electromagnetic Interference (EMI) Duct 570 prevents electromagnetic interference and simultaneously connects a cable 601 (see FIG. 13) to the electronic device P or the like from the outside of the housing 511. It is a duct inserted inside, and is fixed to the back surface of the housing 511 via the gasket 571 which has insulation resistance, as shown in FIG.

As a result, the cable 601 can be wired from the outside to the inside of the test box main body 510 via the EMI duct 570, while also acting as a waveguide of the duct (transmitting a radio wave having a wavelength longer than a predetermined wavelength). Radio wave to be intruded from the insertion passage portion of the cable 601 can be shielded, so that the shielding of the radio wave of the test box body 510 can be properly maintained.

In addition, as shown in FIG. 13, electromagnetic interference is prevented by wiring the cable 601 such that a predetermined length (for example, 100 mm or more) of the cable 601 passes through the inside of the EMI duct 570. It can prevent appropriately.

In addition, as shown in FIG. 13, the cable 601 includes a noise absorber that absorbs noise that conducts the inside of the cable 601 to the outer circumferential surface of the portion passing through the inside of the EMI duct 570 and the predetermined front and rear portions. 602 is covered. Specifically, for example, an EMI tape such as Lumidion (registered trademark) (Toyo Service Co., Ltd.) is wound around the cable 601 at a predetermined length (for example, 300 mm or more). As a result, the copying and transmission and transportation of noise from the cable 601 can be suppressed, and therefore, the test unit 600 can control and measure the radio waves transmitted and received by the electronic device P with high accuracy.

Such an EMI duct 570 is made of a die cast, and as shown in FIG. 15, a plurality of concave grooves 572 are formed on the side (the side of the housing 511) through which the cable 601 passes. By passing the cable 601 through the concave groove 572, the cable 601 can be prevented from moving up and down inside the EMI duct 570, and the cable 601 can be aligned. In addition, when a plurality of cables 601 are passed through the EMI duct 570, the space between the cables is filled by the side wall portion (metal) of the concave groove 572, so that the propagation of the test box body 510 is performed. Can be appropriately maintained. Moreover, since each cable can be wired in parallel, for example, when attaching the ground etc. which contact each cable uniformly, the attachment becomes easy.

The honeycomb filter 580 is a filter for supply / exhaust that communicates with the outside of the test box main body 510 and shields radio waves from entering the outside of the test box main body 510, and is shown in FIG. 15. As described above, the gasket 581 having insulation resistance is fixed to the rear surface of the housing 511. 18A is a perspective view of a honeycomb filter.

More specifically, the honeycomb filter 580 is made of metal (eg, made of aluminum or aluminum alloy) having a plurality of thin holes 582 having a regular hexagonal shape when viewed from the front, as shown in Fig. 18A. And the like, and through the plurality of thin holes 582, the flow of air inside and outside of the test box body 510 is ensured, and radiated from, for example, the electronic device P or the like. The heat can be exhausted. The shape of the thin hole 582 is not limited to a regular hexagon, but may be, for example, circular or rectangular.

In addition, since the thin holes 582 are surrounded by the peripheral wall 583 having a function as a waveguide, the thin holes 582 are not intended to penetrate from outside of the test box body 510 because they do not transmit and carry radio waves of a wavelength longer than a predetermined wavelength. Can effectively shield radio waves. In addition, the waveguide formed by the opening diameter of the through hole 511b (see FIG. 15) formed on the rear surface of the housing 511 (test box body 510) and the length of the honeycomb filter 580 (a circumferential wall 583). Length) and the aperture diameter (distance between two opposite sides of the regular hexagon) of the thin hole 582 are set based on the wavelength of the radio wave which does not transfer and convey the inside of the honeycomb filter 580.

Instead of the honeycomb filter 580 described above, a mesh filter 585 as shown in FIG. 18B may be provided. 18B is a perspective view illustrating a mesh filter.

The mesh filter 585 is a filter for supply / exhaust that communicates the outside and the inside of the test box body 510 and shields radio waves to intrude from the outside of the test box body 510, and like the honeycomb filter, It is fixed to the back surface of the housing 511 via the gasket which has insulation resistance (refer FIG. 15).

The mesh filter 585 is a mesh laminate in which a plurality of meshes of metal (for example, made of aluminum, made of aluminum alloy, etc.) are stacked, and through this mesh, the air flows outside and inside the test box body 510. Is secured, and the heat radiated from the electronic device P or the like can be exhausted, for example. In addition, since diffraction loss of radio waves occurs inside the metal mesh laminate, radio waves intended to intrude from the outside of the test box body 510 can be effectively shielded.

The mounting unit 590 is a unit for fixing the electronic device P to the inside of the housing 511. As shown in FIGS. 13 and 14, the mounting unit 590 is provided to cover the entire bottom surface of the housing 511. The holding plate 591 and the holding fixing jig 592 which are detachably fixed to the holding plate 591 and hold | maintain and fix the electronic device P are comprised.

As shown in FIG. 13, the fixing plate 591 is a plate member having a rectangular shape in plan view, and a plurality of bolt holes 591a for fixing the holding fixing jig 592 are formed. The bolt hole 591a is provided in multiple numbers in parallel in the left-right direction from the front of the housing 511 so that the fixed position of the holding fixing jig 592 can be changed into a desired position. In addition, on the stationary plate 591, a radio wave absorption sheet having radio wave absorptivity may be provided, or the stationary plate 591 may be formed of a member having radio wave absorptivity.

As shown in Fig. 14, the holding fixing jig 592 is an L-shaped member viewed from the side, and a bolt hole 592a for screwing the bolt B in the bottom is formed. Through the bolt hole 592a, the bolt B is screwed into the bolt hole 591a of the fixing plate 591, whereby the holding fixing jig 592 is fixed to the fixing plate 591. The holding plate 593 and the fastener 594 are attached to the holding fixing jig 592.

The mounting plate 593 is a long plate (see FIG. 13), and is fixed to the holding fixing jig 592. The fastener 594 is a member that holds the electronic device P, and an insertion passage portion 594a that inserts and holds the electronic device P is formed. The fastener 594 is detachably attached to the mounting plate 593, and the mounting direction and the mounting position of the electronic device P can be changed as desired.

The test unit 600 (refer to FIG. 13) detects a reception state of the radio wave of the electronic device P, that is, a unit for controlling and measuring the radio waves transmitted and received by the electronic device P, and the electronic device P returns to normal. It is a unit that can determine whether or not it is operating and transmit various instructions to the electronic device P to operate.

Such a test unit 600 can be connected to the electronic device P which is a test target through the cable 601. Specifically, one end of the cable 601 is connected to the test unit 600, the other end is drawn out into the test box body 510 through the EMI duct 570, and is connected to the electronic device P. have. At the other end of the cable 601, a connector (not shown) for detachably connecting to the electronic device P is provided.

Next, the electronic device test method according to the embodiment of the present invention will be described with reference to the drawings, while explaining the operation of the test box 501 for electronic devices configured as described above.

First, as shown in FIG. 13, the door 512 is opened, the electronic device P is put inside the housing 511 (test box main body 510), and the fixture 594 of the mounting unit 590 is shown. It passes through the insertion passage part 594a (refer FIG. 14) formed in the inside, and is fixed to the inside of the housing 511 (test box main body 510). Next, after connecting the connector (not shown) of the cable 601 to the electronic device P, the door 512 is closed.

Then, for example, by turning on a test start switch (not shown) or the like, an electrical signal is transmitted from the radio wave transmission / reception unit (not shown) to the antenna 560, and radio waves are radiated from the antenna 560. do. The test of the operation of the electronic device P is performed by detecting the reception state of the radio wave of the electronic device P in the test unit 600 (see FIG. 13) while radiating the radio wave from the antenna 560. The test unit 600 detects the reception state of the radio wave of the electronic device P and determines whether the electronic device P is operating normally.

At this time, by operating the above-mentioned radio wave transmitting / receiving unit (not shown), the test can be performed by changing the intensity of the radio wave radiated from the antenna 560, the frequency band, or the like.

If it is determined that the steady state, the door 512 is opened to change the direction of the antenna 560, then the door 512 may be closed to test other polarized planes (horizontal and vertical waves).

In addition, when it determines with being normal, the door 512 is opened, the position of the holding fixing jig 592 is changed, it is fixed to the fixing plate 591, the distance with the antenna 560 is changed, and the electronic device P propagates. A test may be made as to whether it can be received normally.

Since the state of the test of the electronic device P as described above can visually check the inside of the test box body 510 from the outside through the window 520 (glass plate 521), for example, The presence or absence of the lighting of the incoming lamp of the electronic device P by the reception can be confirmed. Here, in the test box 501 for electronic apparatuses which concerns on this invention, since the inside of the test box main body 510 is brightened by the bright resin film 540 fixed to the surface of the electromagnetic wave absorber 530, a glass plate is used. Even when the transmittance | permeability with respect to visible light of 521 falls, the electronic device P inside the test box main body 510 can be visually confirmed favorably. In addition, since the test box 501 for an electronic device can illuminate the inside of the test box main body 510 by the LED lamp 550, the test box body 510 with the effect of the resin film 540 mentioned above. The electronic device P inside of can be visually confirmed better.

The distance between the antenna Pa (see FIG. 14) of the electronic device P and the antenna 560 is set so as to be equal to or greater than the wavelength? Of the radio waves emitted from the electronic device P or the antenna 560. It is preferable to set it to 2 or more. This makes it possible to arrange the antenna Pa of the electronic device P in the region of the far-field electromagnetic field, and the electronic device P can be tested at a position where the electric field strength is stabilized. Therefore, the electronic device P The test of can be performed precisely.

Here, the region of the far field means a region in which the wave impedance becomes equal to the wave impedance Z ₀ of space. Radio waves radiated from the antenna 560 carry transfer propagation close to plane waves in this region.

The above is a series of operation | movement of the test box 501 for electronic devices, and an electronic device test method.

According to the test box 501 for electronic devices described above, since the resin film 540 is provided on the surface of the radio wave absorber 530 inside the test box main body 510, for example, ITO is applied to the glass plate 521. Since the inside of the test box body 510 becomes bright even when the film is formed in a film thickness or by forming ITO films on both surfaces of the glass plate 521, even when the transmittance to visible light of the glass plate 521 is lowered, the test box is brightened. The electronic device inside the main body 510 can be visually confirmed well.

Moreover, according to the test box 501 for electronic devices, since the electromagnetic wave absorber 530 is provided in the inside of the test box main body 510, for example, the antenna Pa of the electronic device P or the antenna ( Since the radio wave radiated | emitted from 560 etc. can be absorbed effectively, the resonance phenomenon of the radio wave in the inside of the test box main body 510 can be prevented, and the test of the electronic device P can be performed precisely.

As mentioned above, although one Embodiment of this invention was described, Embodiment of this invention is not limited to this. About a specific structure, it can change suitably in the range which does not deviate from the meaning of this invention, For example, the following changes are possible.

You may comprise the resin film 540 with foamed resin. In this way, even if the permeability to the visible light of the glass plate is lowered by forming an ITO film on the glass plate with a film thickness or by forming the ITO film on both sides of the glass plate, the test box is made of a foamed resin fixed to the surface of the radio wave absorber. Since the inside of the main body becomes bright, the electronic equipment inside the test box main body can be visually confirmed with good visual quality. That is, the foamed resin is generally white when visible light from the outside is diffusely reflected to contain bubbles inside, and when the colorless transparent resin is used as the base material. Therefore, it is effective for visual confirmation. Moreover, as long as it is resin plates, such as foamed styrol, the effect of being easy to process and handle can be acquired. In addition, it is possible to reduce the raw material cost by using the foamed resin as the insulating layer. In addition, since the foamed resin is light and easy to cut, can be easily processed and handled, and also has excellent workability, it is possible to lower the manufacturing cost of the test box body.

In addition, although the insulating layer is comprised by the resin film 540 in above-mentioned embodiment, it is not limited to this. The insulating layer may be composed of a paper containing a bright dye or a paper on which a bright pigment is printed. Paper is made of Japanese paper or Western paper. The main component of the paper is composed of vegetable fibers such as cellulose. As the dye and the pigment, in the same manner as in the above-described embodiment, those having a color specified in the Munsell colorimeter (JIS Z8721) in the range of 8.0 to 10.0 are used. Specifically, white, yellow, pale yellow, light blue, pale green, yellow green, orange, pale orange, etc. are mentioned, for example. In particular, the brightness in the Munsell color system is preferably in the range of 8.5 to 10.0, and more preferably in the range of 9.0 to 10.0. The bright color dye is colored by using a vegetable dye and soaking in paper. As the dye, anthraquinon-based synthetic dyes may be used. Brightly colored pigments are printed on the surface of the paper to form brightly colored paper. Among the fluorescent pigments, for example, zinc sulfide, zinc silicate, calcium sulfide, strontium sulfide, calcium tungstate, calcium phosphate and the like can be used.

It is preferable to form an insulating layer so that there is no clearance gap with the surface of a radio wave absorber. Therefore, the paper is preferably composed of thick paper having a predetermined thickness. In addition, the paper is fixed to the surface of the radio wave absorber with pins, screws, or the like. In addition, if an adhesive such as a thermoplastic adhesive, a thermosetting adhesive, a photocurable adhesive, or the like having excellent insulating properties is used, or a design such as bonding an insulating film to a spot is devised to minimize the adhesive area, the paper is applied to the surface of the radio wave absorber. It may be fixed with an adhesive. By doing in this way, a radio wave reflection can be suppressed and it is possible to fix an insulating layer to the surface of a radio wave absorber, without damaging the radio wave absorption characteristic of a radio wave absorber. In addition, the insulating film made of paper may be provided on the surface of the protective film 533 similarly to the resin film 540 or may also serve as the protective film 533.

Thus, also when the insulating layer is comprised by the paper containing a bright dye or the paper on which the bright pigment was printed, the effect similar to embodiment mentioned above can be acquired. In addition, by using a paper that is lightweight and easy to cut, processing and handling can be easily performed.

Moreover, in addition to a resin film and paper, an insulating layer may be comprised from ceramics, such as a gypsum board and a tile, or glass, if it has a predetermined insulation effect. As a specific example of a ceramic raw material, aluminum oxide (sapphire), quartz (crystal), silicon oxide (silicon carbide), calcium carbonate, etc. are mentioned, for example. After mixing and mixing these raw materials, preparations, and additives in a predetermined | prescribed compounding ratio, it mixes with a binder by adding water, shape | molding with a molding machine, drying, and sintering at high temperature, and manufacturing a ceramic plate. A glass plate is manufactured by inserting powder mixtures, such as silica sand, soda ash, limestone, boron, aluminum hydroxide, into a gas furnace, melt | dissolving at 1550 degreeC, and flowing this liquid glass on the melt melted in the long thin passage called a float bus, and manufacturing it. A colored glass which adds a specific transition metal element to this, absorbs only light of a specific wavelength, or a so-called liver glass that scatters sunlight on the glass surface by increasing the surface roughness, or an insulating plate serving as an insulating layer. It shall be included in.

In the above embodiment, the mobile telephone is illustrated and described as the electronic apparatus P. However, the electronic apparatus P to be tested in the present invention is not limited to the mobile telephone. For example, a PDA (Personal Digital Assistance) that transmits and receives radio waves and a notebook personal computer having a wireless LAN (Local Area Network) function may be used as a mobile phone. Moreover, the precision measuring apparatus, medical apparatus, etc. which are not preferable to be influenced by external radio waves may be sufficient. In addition, it may be a household electrical appliance, a medical apparatus, or the like, which is undesirable to radiate radio waves of a predetermined value or more to the outside. In this case, it goes without saying that the shape or size of the mounting unit 590, or whether the mounting unit 590 is provided is appropriately set according to the electronic device to be tested.

In the above embodiment, the housing 511 is formed by welding a plurality of metal panels 511a to a frame (not shown) serving as a skeleton, but the present invention is not limited thereto. It is good also as a structure which can be assembled and disassembled by which a panel is assembled by a bolt etc., and is formed. Moreover, in the case of such a structure, it is preferable to interpose the filler which has the shielding of an electric wave in the clearance gap of a some metal panel. Thereby, the shielding of the radio wave of the housing (test box main body) can be kept favorable. As a filler with shielding of radio waves, for example, at least one of the upper and lower surfaces is insulated with a lossy layer (for example, a carbon resistance sheet, a metal thin film) insulated with an insulating layer (for example, paper, an adhesive tape which also serves as an adhesive layer). A sheet body for electromagnetic shielding bonding which has a resistance sheet, a heat ray blocking film, etc.) can be used. Specifically, Lumidion (registered trademark) IR (Toyo Service Co., Ltd.) etc. can be used, for example.

In the above embodiment, the housing 511 is made of metal to increase the shielding property, rigidity, or the like of the radio wave. However, the housing is not limited to this, and the housing may be formed of, for example, a plate having shielding of the radio wave.

In the above-described embodiment, as shown in FIGS. 12, 13, and 15, the window 520 is formed in the door 512. However, the configuration is not limited to this, and the test box body 510 is provided. It is good also as a structure which forms the window 520. In addition, you may form a plurality of doors and windows, respectively. In addition, the window may be opened and closed appropriately without providing a door in the test box body.

In the above embodiment, the electromagnetic wave absorber 530 is a lambda / 4 type electromagnetic wave absorber. However, the electromagnetic wave absorber 530 is not limited thereto, and a known electromagnetic wave absorber can be widely used depending on the characteristics of radio waves radiated from the inside. For example, any of a resistive radio wave absorber, a dielectric radio wave absorber, a magnetic wave absorber, and a radio wave absorber in combination thereof may be used, and any one of a single layer type and a multilayer type may be used.

Specifically, for example, (1) A resistive film sheet (impedance 1088 ohms), a spacer 38 mm, a resistive film sheet (impedance 280 ohms), and a spacer (in order from the side of the panel 511a (or panel 512a)). 38 mm), a radio wave absorber capable of absorbing two kinds of radio waves (around 880 MHz and around 2050 MHz) provided with a protective film [aluminum plate (thin)], and (2) a dielectric wave formed from a compound such as carbon powder or titanium oxide. Absorption sheet, (3) Magnetic wave absorption sheet formed of compound such as ferrite or carbonyl iron, (4) Radio wave absorption sheet formed of composite of resin and magnetic material such as polyurethane, (5) Magnetic material and resistor Any one of a radio wave absorber (for example, Lumidion (registered trademark) (Toyo Service Co., Ltd.)) can be used.

In addition, the surface of the radio wave absorber 530 is preferably flat (flat type). According to this, the resin film 540 can be formed easily compared with the case where a wave absorber, such as a wave shape, a mountain shape, a square pyramid shape, etc. is provided. Moreover, the inside (volume) of the test box main body 510 can be enlarged, or the size of the test box main body 510 can be made small.

In the above-described embodiment, the adjustment of the rotation of the antenna 560 involves loosening the connector 561 to rotate the antenna waveguide 562, changing the direction of the antenna 560, and then tightening the connector 561 to antenna. Although the waveguide 562 (antenna 560) was manually fixed, the configuration is not limited thereto. For example, it is good also as a structure performed mechanically combining a well-known power mechanism, a control mechanism, etc.

In the above-mentioned embodiment, although the honeycomb filter 580 (or mesh filter 585) for air supply and exhaust was provided in the back of the test box main body 510 (housing 511), the filter for air supply and exhaust Is not limited to these. For example, a structure in which a plurality of fine through holes are formed on the back of the test box body (housing) in which the inner diameter and the length (panel thickness) are set (designed) to function as a waveguide that does not transmit and carry radio waves longer than a predetermined wavelength. You may make it. In addition, the test box body 510 includes a plate having such a plurality of fine through holes through a mounting frame and a gasket having insulation resistance in the through hole (see FIG. 15) formed on the back of the test box body (housing). It is good also as a structure fixed from the inside.

In the above-mentioned embodiment, although it was set as the structure provided with one filter for supplying and exhausting (honeycomb filter 580 or mesh filter 585) in the back of the test box main body 510 (housing 511), It does not restrict | limit, For example, it is good also as a structure provided with the at least two filter for intake and exhaust. In this case, all of the same types of filters may be used, or different types of filters may be used in combination. Moreover, you may attach an exhaust fan (not shown) to the exhaust through-hole formed in the exhaust filter or the test box main body (housing).

In the above-described embodiment, the fastener 594 is configured to be detachably attached to the mounting plate 593. However, the configuration is not limited to this, and the fastener may be rotatably mounted to the mounting plate. In this case, the adjustment of the rotation of the fixture may be carried out mechanically.

In the above embodiment, the holding fixing jig 592 is configured to be moved in stages by the plurality of bolt holes 591a and the bolts B formed in the fixing plate 591, but the present invention is not limited thereto. For example, the holding fixing jig may be configured to move steplessly along the rail provided on the fixing plate. According to this, the distance of an antenna and a holding fixing jig (electronic device) can be adjusted easily.

In the above embodiment, the electronic device test method determines whether the electronic device P can normally receive the radio wave by radiating the radio wave from the antenna 560 to the electronic device P. Although was demonstrated, the electronic device test method is not limited to this. For example, various instructions are sent from the test unit 600 to the electronic device P, and the electronic device P (antenna Pa). 14, the radio wave is transmitted to the antenna 560, and the radio wave received by the antenna 560 is measured by a radio wave transmission / reception unit (not shown) to determine whether the electronic device P is operating normally. good.

Claims (20)

A test box body in which an electronic device is placed inside and having shielding of radio waves from the outside and having at least one opening communicating with the outside and the inside; The test box body is a test box mounted to the test box body via a hinge, the door for opening and closing the opening, and the test box body is a test box for an electronic device having a lambda / 4 type electromagnetic wave absorber mounted on its inner peripheral surface, A metal finger mounted on an opening edge of the test box body, which is a contact portion of the test box body and the door, or a peripheral portion of the door, It is further provided with a packing having a shielding of radio waves mounted on the periphery of the door or the opening edge of the test box body, The test box main body includes an antenna for transmitting radio waves therein and a fixing jig for holding the electronic device. It is possible to set so that the distance of the antenna of the said electronic device and the said transmission antenna may be more than the wavelength (lambda) of the radio wave radiated | emitted from the said transmission antenna, The test box for electronic devices. A test box body in which an electronic device is placed inside and having shielding of radio waves from the outside and having at least one opening communicating with the outside and the inside; The test box body is a test box mounted to the test box body via a hinge, the door for opening and closing the opening, and the test box body is a test box for an electronic device having a lambda / 4 type electromagnetic wave absorber mounted on its inner peripheral surface, A metal finger mounted on an opening edge of the test box body, which is a contact portion of the test box body and the door, or a peripheral portion of the door, It is further provided with a packing having a shielding of radio waves mounted on the periphery of the door or the opening edge of the test box body, The test box body includes an antenna for receiving radio waves therein and a fixing jig for holding the electronic device therein. It is possible to set so that the distance of the antenna of the said electronic device and the said receiving antenna may be more than the wavelength (lambda) of the radio wave radiated | emitted from the antenna of the said electronic device, The test box for electronic devices. The test box according to claim 1 or 2, wherein the finger is mounted on a side surface of an upright mounting plate provided at an opening edge of the test box body or a peripheral portion of the door. The test box according to claim 1 or 2, wherein the packing is located on the outer circumferential side of the finger when the door is closed. The insertion piece according to claim 1 or 2, wherein the insertion piece is formed on one side of an opening edge portion of the test box body, which is a contact portion of the test box body and the door, and a peripheral portion of the door, It is formed on the other side and has an insertion groove into which the insertion piece is inserted when the door is closed, The finger is mounted on the insertion piece or the inner circumferential side of the insertion groove, and the packing is mounted on the bottom of the insertion groove. The insertion piece according to claim 1 or 2, wherein the insertion piece is formed on one side of an opening edge portion of the test box body, which is a contact portion of the test box body and the door, and a peripheral portion of the door, It is formed on the other side and has an insertion groove into which the insertion piece is inserted when the door is closed, And the packing is mounted on both sides of the insertion piece while the finger is mounted on the inner peripheral side of the insertion piece or the insertion groove. The test box for electronic equipment according to claim 5, wherein a metal finger is mounted inside the insertion groove. The test box for electronic equipment according to claim 5, wherein a metal finger is attached to the insertion piece. The test box for an electronic device according to claim 1 or 2, wherein the test box main body includes a duct for preventing electromagnetic interference and conducting a cable connected to the electronic device therein. The test box according to claim 9, wherein the cable is an optical cable for transmitting an optical signal. A test box body in which an electronic device is placed inside and having shielding of radio waves from the outside and having at least one opening communicating with the outside and the inside; The test box body is a test box mounted to the test box body via a hinge, the door for opening and closing the opening, and the test box body is a test box for an electronic device having a lambda / 4 type electromagnetic wave absorber mounted on its inner peripheral surface, The test box body is provided with a light therein, the door has a window provided with a glass plate having a shielding of radio waves and transmittance to visible light, The lambda / 4 type electromagnetic wave absorber has a bright insulating layer fixed to the surface, The bright color is an index in which the brightness specified in the Munsell colorimeter is in the range of 8.0 to 10.0, wherein the test box for electronic equipment is used. A test box body in which an electronic device is placed inside and having shielding of radio waves from the outside and having at least one opening communicating with the outside and the inside; The test box body is a test box mounted to the test box body via a hinge, the door for opening and closing the opening, and the test box body is a test box for an electronic device having a lambda / 4 type electromagnetic wave absorber mounted on its inner peripheral surface, The test box body is provided with a window provided with a glass plate having illumination therein and also having a shielding of radio waves and a transparency to visible light, The lambda / 4 type electromagnetic wave absorber has a bright insulating layer fixed to the surface, The bright color is an index in which the brightness specified in the Munsell colorimeter is in the range of 8.0 to 10.0, wherein the test box for electronic equipment is used. The test box for electronic equipment according to claim 11 or 12, wherein the insulating layer is made of a resin containing the bright pigment. The test box for electronic equipment according to claim 11 or 12, wherein the insulating layer is made of a foamed resin. The test box according to claim 11 or 12, wherein the insulating layer is made of paper containing the bright dye or paper printed with the bright pigment. The test box according to claim 11 or 12, wherein the insulating layer is made of the bright ceramics or glass. The test box for electronic equipment according to claim 13, wherein the pigment is a white pigment or a fluorescent pigment. The test box for electronic equipment according to claim 11 or 12, wherein the insulating layer also serves as a protective film of the λ / 4 type radio wave absorber. The test box according to claim 11 or 12, wherein the illumination is an LED lamp. The test box according to claim 11 or 12, wherein the insulating layer is fixed to the surface of the λ / 4 type electromagnetic wave absorber with a pin or a screw.

Images