JPH08316678A - Electromagnetic wave shielding box - Google Patents

Abstract

PURPOSE: To obtain a stable shielding effect at all times with easy operation and maintain the shielding effect after much use. CONSTITUTION: This box is provided with a main body 1 which has a storing section where a test object is to be mounted and a cover 10 which, being hinged on the main body 1, closes the storing section. On each side of the main body 1 of the box, a plurality of turning plates 23 are so installed that they may be symmetrical about the storing section. The turning plates 23 are separated into two groups on each side and the turning plates in one group are moved in linkage with those in the other group. These turning plates 23 can be collectively controlled by a knob 27 from outside the main body 1 of the box. On outer edges of the turning plates 23, stoppers 28 are fastened. The cover 10 has a plurality of projections 21 to set in with the stoppers 28. By closing the cover 10 and then controlling the knob 27 and thereby turning the turning plates 23, the stoppers 28 set in with the projections 21 and thereby the cover 10 is fastened on the main body 1 of the box and then the storing section is shielded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave shield box used for testing the operation of a wireless device such as a mobile phone.

[0002]

2. Description of the Related Art In recent years, with the enhancement of mobile communication service networks, wireless devices such as mobile phones have become popular not only for companies but also for individuals. With the widespread use of such wireless devices, there is a demand from users for clarifying whether the transmission and reception states of the wireless device are normal at the time of purchase or after use. Therefore, each sales office or the like is equipped with a tester that can easily perform an operation test of the wireless device at a counter.

When performing an operation test with this type of tester,
An electromagnetic wave shield box having a space for mounting the wireless device in a state of being shielded from surrounding electromagnetic waves so that electromagnetic waves from the outside do not enter the antenna of the wireless device to be tested and adversely affect the test results. Is used.

As shown in FIGS. 4 and 5, a conventional electromagnetic wave shield box is generally composed of a box body 101 and a lid 110, in which a metal plate such as aluminum capable of reflecting electromagnetic waves is used as an outer casing. . The box body 101 includes a storage unit 10 in which a wireless device, which is a test object, is placed.
Have two. A portion of the storage portion 102 corresponding to the lid 110 is opened, and a concave groove 103 is formed at the opening edge over the entire circumference. And the groove 10
A conductive elastic member 104 is embedded in the reference numeral 3.

The lid 110 is provided on its inner wall surface with a ridge 112 which is fitted into the groove 103 provided at the opening edge of the housing portion 102. This ridge 112 is the lid 1
When the 10 is closed, it is fitted into the concave groove 103, and its edge portion 11
When the elastic member 104 is in contact with the elastic member 104,
Block 02.

Further, such an electromagnetic shield box is provided with a fixing means 120 for fixing the lid 110 to the box body 101. The fixing means 120A shown in FIG.
A plurality of (four places) screw holes 108 are provided in a portion deviated from 2, and a screw member 109 having a male screw corresponding to each screw hole 108 of the box body 101 is arranged in the lid body 110. There is. Then, after the lid 110 is positioned on the box body 101, the screw members 109 are tightened from the outer wall side of the lid 110, whereby the box body 1
The lid 110 is fixed to 01.

Further, the fixing means 120B shown in FIG. 5 has a cover 110 for the one end side 101a of the box body 101.
One end side 110 a of the box is rotatably supported via a hinge 111, and the other end side 1 of the box body 101 and the lid 110 is
10b is provided with a plurality of screw holes 108 and screw members 109 (two locations) similar to the fixing means 120A shown in FIG. Then, after positioning the lid 110 on the box body 101, each screw member 1 is inserted from the outer wall side of the lid 110.
The lid 110 is fixed to the box body 101 by tightening 09.

As described above, the lid 1 is fixed by the fixing means 120.
By fixing 10 to the box body 101, the ridge 11 fitted in the groove 103 at the opening edge of the storage portion 102
Since the second edge portion 112a presses the elastic member 104, the housing portion 102 is closed, and a shield space shielded from external electromagnetic waves is formed in the housing portion 102.

As a conventional fixing means, in addition to the above-described fixing by the screw hole 108 and the screw member 109, it is also known to use a latch or a clasp which is a tightening device (not shown).

[0010]

However, in the above-mentioned conventional electromagnetic wave shield box, the box body 1 is used.
When the solid means 120 for fixing the lid 110 to 01 is the fixing means 120A shown in FIG. 4, since the lid 110 is fixed by the plurality of screw members 109, the individual screw members 109 must be respectively tightened. Therefore, there was a problem of poor operability.

A plurality of individual screw members 10 are provided.
Since the operator manipulates 9 by hand, it is not easy to tighten each with a uniform tightening force. If this tightening is not uniform, the storage portion 10 by the ridges 112 of the lid 110 is not.
Since the pressing force on the elastic member 104 in the second concave groove 103 is not uniform, there is a problem that a sufficient shielding effect cannot be obtained. Further, since the tightening by the screw member 109 is performed with different tightening force depending on the time of operation or the operator, it is not possible to always obtain the same shield effect.

The lid 110 is the box body 101.
Due to the more detached structure, the convex strip 112 with respect to the concave groove 103
Was not easily positioned, which also caused a difficulty in the operation.

The solid means 120 is the fixing means 12 shown in FIG.
In the case of 0B, the screw member 10 is more than the fixing member 120A of FIG.
Although the operability is improved because the number of 9 is reduced, one end side 110a of the lid 110 is supported by the box body 101 via the hinge 111, and the other end side 1 of the lid 110 is
Since only 10b is pressed and fixed by the screw member 109, there is a problem in that the force pressing the lid 110 near the hinge 111 and the fixing means 120B is not constant and a stable shield effect cannot be obtained. It was

Further, since the force pressing the lid 110 is not constant, the elastic member 104 is pressed unevenly even if the shield effect is temporarily obtained.
Due to many uses, the strongly pressed portion of the elastic member 104 is partially deformed, which may reduce the shielding effect. Further, since the elastic member 104 constantly resists the pressing force of the convex strip 112 of the lid 110, the lid 11 is not used for many uses unless the force pressing the lid 110 is constant.
0 is distorted, which may also reduce the shield effect.

In the case of using a latch or a clasp instead of the screw member 109 as the fixing means, when the fixing means 120A shown in FIG. 4 is substituted, each of them can be tightened uniformly, but the lid 110 is Since it is necessary to disengage from the box body 101 and to further tighten individual latches or clasps, the problem of poor operability cannot be solved. Also, the fixing means 120B of FIG.
If one is used as a substitute, the one end side 110a of the lid 110 has a hinge 1
Since the structure is supported by 11, and the other end side 110b is tightened, the force pressing the lid 110 is not constant and the same problem cannot be solved.

Therefore, in order to solve the above problems, the present invention provides an electromagnetic wave shield box which is easy to operate, can always obtain a stable shield effect, and can maintain the shield effect even after many uses. It is intended to be provided.

[0017]

In order to achieve the above object, an electromagnetic wave shield box according to the present invention has a box-shaped space in which a test object is placed, and a conductive elastic member 4 is provided at an opening edge of the space. A box main body 1 having a storage portion 2 in which a recessed groove 3 to be embedded is provided, and a ridge 12 pivotally attached to the box main body 1 and fitted in the recessed groove 3 to abut the elastic member 4. In the electromagnetic wave shielding box including the lid 10 that closes the storage portion 2, a plurality of electromagnetic shield boxes are provided on each side of the box body 1 so as to be symmetrical with respect to the storage portion 2. A box body having a rotatable rotary plate 23 provided with a locking portion 28 on an outer edge thereof and a plurality of protrusions 21 provided on the lid body 10 and engageable with the locking portion 28 of the rotary plate 23. Fixing means 20 for fixing the lid 10 to the 1 With which, the rotating plate 23,
It is characterized in that it is divided into two sets on each side of the box body 1 and is interlocked with each other, and is provided so as to be collectively rotatable from the outside of the box body 1.

The rotary plates 23 may be interlocked with each other so that they can be collectively rotated from the outside of the box body 1.

The locking portion 2 accompanying the rotation of the rotary plate 23
Detecting means 20 for detecting the engagement of the projection 8 with the projection 21
May be provided.

[0020]

With the lid 10 closed with respect to the box body 1, the rotary plates 23 interlocked with each side from the outside of the box body 1 are collectively rotated.
The locking portion 28 provided on the rotary plate 23 rotates at the same rotation angle and is engaged with the protrusion 21 on the lid 10 side. Therefore, the lid body 10 is attracted and fixed to the box body 1 side by a uniform force, so that the lid body 10 is protruded from the elastic member 4 in the groove 3 provided at the opening edge of the storage section 2. The strips come into contact with each other with a uniform pressing force, so that a stable shield space is generated in the storage section 2.

Further, since all the rotary plates 23 are interlocked with each other, they can be collectively rotated from the outside of the box body 1, and a stable shielded space in the storage section 2 can be easily obtained.

Further, the locking portion 2 accompanying the rotation of the rotary plate 23
The engagement of the projection 8 with the projection 21 is detected by the detection means 20, so that it is recognized whether or not the shield space is obtained.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is an overall perspective view showing an embodiment of an electromagnetic wave shield box according to the present invention.

As shown in FIG. 1, the electromagnetic wave shielding box according to this embodiment includes a box body 1 and a lid 10.
And a fixing means 20 for fixing the lid 10 to the box body 1.
It is roughly composed of.

The box body 1 has an outer casing made of a metal plate such as aluminum capable of reflecting electromagnetic waves, and has an upper surface 1a on which a storage unit 2 for mounting a wireless device such as a mobile phone as a test object is provided. Has been. The storage part 2 has a predetermined step from the upper surface 1a of the box body 1 and projects upward. The housing 2 has a rectangular upper surface that projects upward, and has a box-shaped space that extends inside the box body 1 from the opening. In addition, at the opening edge of the storage portion 2, a concave groove 3 formed in a rectangular shape over the entire circumference thereof.
Is provided. The elastic member 4 having conductivity is embedded in the groove 3 in an endless manner.

At a position in front of the box body 1 and not related to the storage section 2, a part of the outer casing of the electromagnetic wave shielding box is projected above a predetermined step of the storage section 2. The display unit 5 is formed. The display unit 5 includes a start button 6a for starting a test of the wireless device, a stop button 6b for interrupting the test, and a plurality of status displays such as "under test", "normal", and "failure" and test results. Indicator lamp 7 is provided.

The lid 10 is made of a metal plate such as aluminum that can reflect electromagnetic waves, and is formed in a flat plate shape. The hinge 11 is provided at a position behind the box body 1 and not related to the housing 2.
It is rotatably pivoted through. At both side edges of the lid body 10, when the lid body 10 is rotated and closed, the outer wall surface of the lid body 10 and the upper surface of the display unit 5 of the box body 1 are flush with each other, and the upper surface of the box body 1 is A side plate 10a that is in contact with 1a and closes each side of the box body 1 is integrally formed.

On the inner wall surface of the lid body 10, there is provided a ridge 12 formed in a rectangular frame shape so as to be fitted corresponding to the concave groove 3 provided at the opening edge of the housing portion 2. . This ridge 1
2 is fitted into the groove 3 when the lid 10 is closed with respect to the box body 1, and the edge portion 12 a thereof abuts the elastic member 4 to close the storage portion 102.

The fixing means 20 is generally composed of a pin-shaped projection 21 and a rotary plate 23. The protrusion 21 is the lid 10.
It is provided so as to project inward on the inner wall surface of the side plate 10a. The protrusions 21 are provided at two positions on each side plate 10a at a position corresponding to a rotating plate 23, which will be described later, and at four positions facing each other between the side plates 10a and 10a.

The rotary plates 23 are provided at two locations on each side of the box body 1 and a total of four locations. The rotary plate 23 is
It is formed in a disk shape, and its central portion is fixed to one end of a shaft 24 provided inside the box body 1,
It is rotatably arranged via a shaft 24. Further, the rotary plate 23 is provided with a part thereof protruding from a slit 25 provided on the upper surface 1 a of the box body 1.

The specific position of the rotary plate 23 will be described. On each side of the box body 1, a shaft 24 is formed along the side of the recessed groove 3 formed in the housing 2 and the front and rear corners are formed. Two parts are arranged at positions equidistant from the part. Further, they are provided symmetrically on each side of the box body 1 so as to be coaxial with each other via the concave groove 3. Therefore, since the rotary plate 23 is fixed to the shaft 24 arranged in this manner, on each side of the box body 1, four positions are provided at symmetrical positions in the front and rear and both sides along the side of the groove. It is arranged.

Each rotating plate 2 constructed in this way
In FIG. 3, two rotary plates 23 on each side of the box body 1 are connected by pivoting each end of a rod-shaped interlocking plate 26 to each outer wall 23a inside the box body 1. Has been done. The other end of the shaft 24, to which the rotary plate 23 is fixed, extends outward from the side of the box body 1. At the other end of the shaft 24, a knob 27 is fixed to one of the connected rotary plates 23. A bearing 27a is provided on the other of the connected rotary plates 23.

Therefore, the four rotary plates 23 are interlocked on each side of the box body 1 to be divided into two sets, two interlocked rotary plates 23 from the outside of the box main body 1. By rotating the knob 27, the shaft 2
One rotary plate 23 rotates through the four rotary plates 2 and one rotary plate 2
3 rotates, the other rotary plate 2 through the interlocking plate 26.
3 is designed to rotate at the same time.

The outer wall 23 near the outer edge of the rotary plate 23
A locking piece 28 as a locking portion is fixed to a.
The locking piece 28 is formed in a substantially L shape so as to be able to engage with the protrusion 21 provided on the side plate 10 a of the lid 10.
As the rotating plate 23 rotates, the locking piece 28 can be inserted into and removed from the inside and outside of the box body 1 through an insertion hole 25a formed continuously with the slit 25 provided in the upper surface 1a of the box body 1. The engagement pieces 28 are configured to be able to enter and exit at the same time by interlocking the connected one and the other rotary plates 23. Although not shown in the drawings, the projection 21 is used as another locking portion.
It is also possible to form a cutout groove on the outer edge of the rotary plate 23 so that the locking piece 28 can be engaged with the locking piece 28.

Further, inside the box body 1, a micro switch 29 is provided as a detection means which is turned on / off in connection with the movement of the interlocking plate 26 which moves with the rotation of the connected rotary plate 23. ing. The ON / OFF signal of the micro switch 29 is transmitted to a tester (not shown) electrically connected to the box body 1 by a cable or the like.

Hereinafter, the lid 1 by the fixing means 20 described above
The fixing operation of 0 will be described with reference to FIGS. 2A and 2B, including the test procedure of the wireless device. First, as shown in FIG. 2A, when the lid 10 is open, the knob 27 is rotated in the direction of arrow A in the drawing, and each rotary plate 23 is rotated to move each locking piece 28 into the box. The main body 1 is put into the inside from the upper surface 1a and made to stand by. At this time, the interlocking plate 26 is retracted with respect to the micro switch 29, and the micro switch 29 is turned off to notify the tester that the test cannot be executed. Further, since the locking piece 28 fixed to the other rotary plate 23 and the interlocking plate 26 contact each other, the knob 27 is regulated without being further rotated in the arrow A direction.

Then, the power of the wireless device to be tested is turned on, the antenna is extended, and the antenna is positioned and placed in the storage section 2 with the operation surface facing upward.

Next, as shown in FIG. 2B, the lid 10
When closing and fixing to the box body 1, the knob 27 is rotated in the direction of the arrow B in the figure to rotate each rotary plate 23 and bring out each locking piece 28 from the upper surface 1a of the box body 1. Then, the locking piece 28 is engaged with the protrusion 21 of the lid body 10, so that the lid body 10 is attracted and fixed to the box body 1 side (lower side in the figure). At this time, the interlocking plate 26 moves forward with respect to the micro switch 29,
The end of the micro switch 29 presses the actuating piece of the micro switch 29 to turn on the micro switch 29 and inform the tester that the test can be performed. Also, the knob 27
Because the engagement piece 28 is engaged with the protrusion 21,
It is regulated without being further rotated in the direction of arrow B.

As described above, by simply rotating the knobs 27, 27 on the respective sides until they stop, the knobs 4 on the sides of the box main body 1 are symmetrically arranged on the front and rear sides and on the both sides along the side portions of the groove. Locking piece 2 of rotating plate 23 arranged at a certain position
Since 8 rotates the same distance and uniformly engages with the projections 21 at four locations, the lid body 10 is attracted and fixed to the box body 1 with a uniform force, and the lid body 10 is externally attached to the box body 1. A shielded space that is shielded from electromagnetic waves is formed.

By pressing the start button 6a provided on the box body 1, transmission / reception of a signal is automatically performed between the tester and the wireless device by a radio wave having a frequency corresponding to the model concerned. As a test result including the level judgment and the like, for example, "normal" and "fault" are displayed on the display unit 5 provided in the box body 1.

Therefore, in the electromagnetic wave shield box having such a structure, in the fixing means 20, the rotating plates 23 at a total of four positions arranged symmetrically along the side of the concave groove are provided in the box body 1. Each side is interlocked at two places, and is simultaneously rotated at the same angle only by operating the knob 27 so that each locking piece 28 is always uniformly engaged with each projection 21. . Therefore, the lid 10 is attracted toward the box body 1 side with a uniform force, and the lid 10
Since the edge portion 12a of the ridge 12 provided on the pressing portion presses the elastic member 4 of the storage portion 2 with a uniform force, the storage portion 2 can be easily operated.
A stable shielded space can be obtained inside.

Further, since the rotation of the knob 27 is restricted within the range of a constant rotation angle, each locking piece 28 is always engaged with each projection 21 in the same state, so that the ridge 1
The pressing force exerted by the elastic member 4 on the elastic member 4 always has the same force, and the same shield effect can be obtained even when the operation is performed or the operator operates differently.

Since the pressing force applied to the elastic member 4 by the ridge 12 is always the same, the elastic member 4 may be partially deformed or the lid 10 may be distorted by many uses as in the conventional case. It is possible to maintain a stable shield effect.

Further, whether the locking piece 28 engages with the projection 21 to obtain the shield space or not is recognized by the ON / OFF signal of the micro switch 29, and the signal of the micro switch 29 causes the tester to detect. It is possible to inform the test whether the test can be executed or not.

In the above embodiment, the two knobs 2
By rotating 7 the rotary plate 23 provided on each side of the upper surface 1a of the box body 1 is rotated simultaneously in conjunction with each other. However, as shown in FIG.
By providing the handle 30 for interlocking the spaces, all the rotary plates 23 can be simultaneously rotated by the operation of the handle 30, and the operability can be further improved.

Further, the rotary plate 23 interlocked with the interlocking plate 26
Are provided on the upper surface 1a of the box body 1 at two positions symmetrically along each side of the concave groove 3, and the rotary plate 23 is arranged at three positions along each side of the concave groove 3. etc,
The protrusions 21 may be provided at a plurality of symmetrical positions, and the same number of protrusions 21 may be provided corresponding to the rotary plate 23.
The pressing force exerted on the elastic member 4 by can be made more uniform.

A micro switch 29 is used as a detection means for confirming whether the locking piece 28 engages with the projection 21 to obtain a reliable shield space. In addition to this, a photo sensor is used instead. However, a light-shielding plate may be provided at one end of the interlocking plate 26 to detect it in the same manner.

[0048]

As described above, in the electromagnetic wave shield box according to the present invention, in the fixing means, a plurality of rotatable rotary plates are provided so as to be symmetrically positioned on each side of the box body with the storage portion interposed therebetween. , Are divided into two groups on each side of the box body, are interlocked with each other, and are configured to be collectively rotatable from the outside of the box body. Rotate at the same rotation angle on each side of the box body and engage with the protrusion on the lid side. Therefore, the lid body is attracted to the box body side with a uniform force, and the edge portion of the ridge provided on the lid body presses the elastic member 4 of the storage section 2 with a uniform force.
It is possible to obtain a stable shielded space in the storage portion by an easy operation.

Since the pressing force exerted on the elastic member by the ridge is always the same, there is no possibility that the elastic member will be partially deformed or the lid will be distorted by many uses, and a stable shield effect can be maintained. can do.

Further, when all the rotating plates are interlocked, all the rotating plates can be collectively rotated from the outside of the box body, so that a stable shielded space in the housing can be obtained more easily. it can.

Further, it is possible to recognize by the detecting means whether or not the locking portion engages with the protrusion to obtain the shield space.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of an electromagnetic wave shield box according to the present invention.

FIG. 2A is a conceptual diagram showing a main part of the same embodiment. (B) An operation diagram of a main part.

FIG. 3 is a perspective view showing another embodiment.

FIG. 4 is a perspective view showing a conventional example.

FIG. 5 is a perspective view showing another conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Box main body, 2 ... Storage part, 3 ... Recessed groove, 4 ... Elastic member, 10 ... Lid body, 12 ... Convex strip, 20 ... Fixing means, 21 ...
Protrusions, 23 ... Rotating plate, 28 ... Locking pieces (as locking portions), 29 ... Detecting means.

Claims (3)

[Claims] 1. A storage part (2) which forms a box-shaped space for mounting a test object and is provided with a concave groove (3) in which an electrically conductive elastic member (4) is embedded at an opening edge of the space. ), And a lid body (1) pivotally attached to the box body and having a ridge (12) fitted into the concave groove and abutting the elastic member to close the storage portion. 10), and a plurality of electromagnetic shield boxes are provided on each side of the box body so as to be symmetrical with respect to the storage portion, and locking portions (28) are provided on the outer edges of each of the plurality. Fixing for fixing the lid body to the box body, having a rotatable rotation plate (23) and a plurality of protrusions (21) provided on the lid body and capable of engaging with the locking portions of the rotation plate Means (20) are provided, wherein the rotating plate is divided into two sets on each side of the box body. An electromagnetic wave shielding box, wherein the electromagnetic wave shielding box is provided so that it can be rotated and operated collectively from the outside of the box body. 2. The electromagnetic wave shield box according to claim 1, wherein all of the rotating plates are interlocked with each other so that they can be collectively rotated from the outside of the box body. 3. The electromagnetic wave shield according to claim 1, further comprising a detection means (29) for detecting engagement of the locking portion with the protrusion due to rotation of the rotary plate. box.