JP3673338B2 - Shield box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shield box used for transmission / reception inspection of a wireless terminal or the like, and more particularly to a shield box suitable for a case where a button operation or the like is necessary for inspection.
[0002]
[Prior art]
In recent years, mobile phones such as mobile phones and wireless data terminals (hereinafter referred to as mobile radio terminals or mobile radio terminals) have been remarkably developed and popularized, and further growth in demand is expected. .
Along with this, the development cycle of these mobile radio terminals has been shortened, and the number of repairs and the like has increased significantly.
[0003]
By the way, the performance inspection (performance test) of the device is indispensable when the mobile radio terminal is developed, the product is shipped or repaired.
As one of the performance inspections, there is an inspection of transmission radio wave quality (transmission power, occupied frequency bandwidth, frequency deviation, etc.) and reception sensitivity (hereinafter referred to as transmission / reception inspection).
[0004]
Conventionally, mobile radio terminals have a detachable high-frequency terminal (plug), and a transmission / reception antenna is attached to the high-frequency terminal. Further, even if the transmitting / receiving antenna is directly attached to the main body of the mobile radio terminal, a high frequency terminal is separately provided. Therefore, a transmission / reception inspection is performed by connecting a tester having a power meter, a spectrum analyzer, a standard signal generator, or the like to a high-frequency terminal using a high-frequency cable.
[0005]
However, with the recent spread of mobile radio terminals, mobile radio terminals have been required to be smaller and lighter and lower in price. For this reason, a model that does not have a high-frequency terminal and can be directly attached to a transmission / reception antenna has been developed.
[0006]
Therefore, in such a mobile radio terminal not equipped with a high frequency terminal, a measurement method generally referred to as air coupling must be used. In this air coupling, a measurement antenna is installed at a predetermined distance from a transmission / reception antenna attached to a mobile radio terminal, and a test radio wave is transmitted / received using the measurement antenna.
[0007]
However, according to the air coupling, radio waves are transmitted from the transmission / reception antenna and the measurement antenna of the mobile radio terminal, which affects neighboring base stations. These antennas also receive radio waves from nearby base stations and unwanted radio waves such as noise. Furthermore, the reflected wave generated when the radio wave transmitted from these antennas hits a nearby building or the like cannot be ignored.
[0008]
Therefore, the transmission / reception inspection by air coupling is ideally performed in an anechoic chamber where electromagnetic fields are mutually shielded from the outside and there is no internal reflection, but the anechoic chamber is very expensive and easy. Not adopted. Therefore, instead of such an expensive anechoic chamber, an inexpensive and easy shield box has been developed and used.
[0009]
FIG. 3 is an example of a conventional shield box and is a perspective view showing the entire configuration. The seed box 101 is composed of a housing 101a and a lid 101b, both of which are made of a metal that has a shielding effect against high-frequency electromagnetic fields.
[0010]
One surface (upper surface in FIG. 3) of the housing 101a has an opening surface, and the cellular phone 102 (mobile radio terminal) can be taken in and out from this opening surface. The lid 101b has a shape covering the opening surface, and shields the mobile phone 102 stored inside the shield box 101.
[0011]
In addition, radio wave absorbers 101c, 101c,... Are attached to the entire inner surfaces of both the casing 101a and the lid 101b. Various types of the radio wave absorber 101c have been developed. However, since they are known, detailed description thereof is omitted here.
[0012]
The housing 101a has a table on which the mobile phone 102 is placed (not shown) and a dipole antenna (not shown) at the bottom of the table. This table is made of a material that allows electromagnetic waves to pass through without problems, and enables air coupling between the antenna 102a attached to the mobile phone 102 and the dipole antenna.
[0013]
The other surface (side surface in FIG. 3) of the housing 101a has a high-frequency terminal 103a and a control terminal 103b. The high frequency terminal 103a is connected to the dipole antenna (not shown). The control terminal 103b is connected to a data terminal when measuring a voice terminal of the mobile phone 102 or a wireless data terminal.
[0014]
[Problems to be solved by the invention]
By the way, the cellular phone 102 has a push button 102b for inputting a telephone number and performing other operations. In the transmission / reception inspection of the mobile phone 102, it is necessary to perform various operations of the mobile phone 102. However, in the mobile phone 102 having no data terminal for external operation or data transmission, it is necessary to perform various operations with the push button 102b. is there.
[0015]
Therefore, a window 104 is formed at a position assumed to correspond to the push button 102b of the mobile phone 102 on the lid 101b. In addition, a shielding plate 105 in which a plurality of small holes 105a, 105a,...
[0016]
FIG. 4 is a perspective view showing a detailed configuration of the window 104 portion. In addition, as shown in FIG. 4, this window 104 part has the door 104a with a shielding effect, and it can also cover and cover the window 104 part with the door 104a.
[0017]
The operation of the push button 102b (see FIG. 3) is performed by pressing with the tip of the operation rod 106 through any one of the small holes 105a, 105a. When operation from the window 104 is difficult, the operation is performed by opening the lid 101b.
[0018]
As described above, since the small holes 105a, 105a... Are formed in the shielding plate attached to the window 104, the shielding effect is obtained when the door 104a (see FIG. 4) is released for the operation of the push button 102b. Will fall.
[0019]
For this reason, the neighboring base station is affected, and the mobile phone 102 used for the measurement is connected to the line of the neighboring base station (that is, the control authority is taken away by the base station), and the measurement itself There was a problem that became impossible.
[0020]
The present invention has been made under such a background, and has excellent operability capable of easily operating the push button of the specimen and prevents mutual influence between the specimen and the neighboring base station and others. It aims at providing the shield box which has a high shielding effect.
[0021]
[Means for Solving the Problems]
In order to solve the above-described problem, in the invention according to claim 1, conductive storage means for storing a wireless terminal having a transmission / reception antenna and a push button, and the storage means attached in the storage means Conductive operation attached to a placement means for placing a wireless terminal and a position opposite to the push button of the wireless terminal placed on the placement means on one end face of the storage means The operation means is characterized in that a first shielding plate and a second shielding plate each having a plurality of operation holes are overlapped at a predetermined interval.
According to a second aspect of the present invention, in the shield box according to the first aspect, the operating means is formed of a material having translucency.
Further, in the invention according to claim 3, in the shield box according to claim 1 or 2, the plurality of operation holes of the first shielding plate correspond to the plurality of operation holes. Each of the plurality of operation holes of the second shielding plate is formed at a different center position.
According to a fourth aspect of the present invention, in the shield box according to any one of the first to third aspects, the plurality of operation holes formed in the first shielding plate correspond to the second operation holes. The plurality of operation holes formed in the shielding plate have different inner diameter dimensions.
According to a fifth aspect of the present invention, in the shield box according to any one of the first to fourth aspects, the electromagnetic wave is transmitted to the transmission / reception antenna mounted in the storage means, and the transmission / reception is performed. A measurement antenna for receiving electromagnetic waves from the antenna, and a high-frequency terminal attached to the one end surface or the other end surface of the storage means and connected to the measurement antenna.
[0022]
According to the present invention, the operating means comprising the first shielding plate and the second shielding plate, which are stacked at a predetermined interval, is attached to the opening formed on the one end surface of the storage means. . The operation means has conductivity, and a plurality of operation holes are formed in the first shielding plate, and a plurality of operation holes are formed in the second shielding plate correspondingly, The inside of the storage means is effectively electromagnetically shielded, and the push button of the wireless terminal placed on the placement means in the storage means can be operated by an operating rod or the like through the operation hole. Therefore, in the first aspect of the invention, the shielding effect of the shield box can be enhanced without impairing the operability.
[0023]
In the invention described in claim 2, since the operation means has translucency, the push button of the wireless terminal placed on the placement means in the storage means can be easily visually confirmed. .
[0024]
In the invention according to claim 3, the center position is shifted between the plurality of operation holes of the first shielding plate and the plurality of operation holes of the second shielding plate, and the shielding effect is further enhanced.
[0025]
Furthermore, in invention of Claim 4, an internal diameter dimension differs between the some operation hole formed in the 1st shielding board, and the several operation hole formed in the 2nd shielding board. Accordingly, it is possible to widen the operating angle range of the operating rod and the like, and to reduce the number of operating holes formed in the operating portion, further improving the operability and simultaneously enhancing the shielding effect.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below. FIG. 1 is a side sectional view showing a configuration of a shield box 1 according to an embodiment of the present invention. In the present embodiment, an example in which the mobile phone 2 is applied as a mobile radio terminal will be described.
[0027]
In FIG. 1, 1a is a housing | casing, As an example of a shape, it has a U-shaped cross section as shown in the figure. In FIG. 1, the upper surface of the housing 1a is an opening surface.
[0028]
Reference numeral 1b denotes a lid, which has a shape covering the opening surface of the housing 1a. When the opening surface of the housing 1a is closed by the lid 1b, the shield box 1 of the present embodiment has a rectangular parallelepiped appearance.
[0029]
Note that both the casing 1a and the lid 1b are made of a metal (for example, aluminum) having a shielding effect against a high-frequency electromagnetic field. Accordingly, electromagnetic waves are shielded from each other inside the shield box 1 from the outside.
[0030]
Reference numeral 1c denotes a radio wave absorber that prevents the occurrence of reflection of electromagnetic waves, and is affixed to the entire inner surface of the housing 1a and the inner surface excluding a part of the lid 1b. Even if an electromagnetic wave transmitted from the antenna 2a of the mobile phone 2 or a dipole antenna 11 described later is incident on the surface of the radio wave absorber 1c, the electromagnetic wave is absorbed and no reflected wave is generated.
[0031]
A table 10 on which the mobile phone 2 is placed is provided inside the housing 1a. The table 10 is formed of a material that allows electromagnetic waves to pass through without any problem, such as acrylic resin, and the upper surface of the upper base 10a of the table 10 is provided with a mat made of silicon resin or the like. The telephone 2 is configured not to slide easily.
[0032]
As described above, the cellular phone 2 described in this embodiment includes the antenna 2a. On the other hand, a dipole antenna 11 is attached to a position facing the antenna 2a across the above-described upper base 10a in the housing 1a, and is connected to the high-frequency terminal 3 provided on one side surface of the housing 1a. .
[0033]
Further, the cellular phone 2 has a push button 2b, and a window 4 is formed at a position assumed to correspond to the position of the push button 2b on the lid 1b. A shielding operation unit 5 is attached to the window 4.
[0034]
The shielding operation unit 5 is configured by stacking two shielding plates 5 _-1 and 5 _-2 at a predetermined interval. Each of the shielding plates 5 _-1 and 5 _-2 is formed of a conductive material (for example, an acrylic mesh plate) that transmits visible light and has a shielding action, and each of the plurality of small holes 5a, 5a,. ··have.
[0035]
That is, the position of the push button 2b of the mobile phone 2 can be visually confirmed through the shielding plates 5 _-1 and 5 _-2 , and the push button 2b can be pressed by the operation bar 6 as will be described later. it can.
[0036]
As in the embodiment shown in FIG. 1, with a predetermined spacing the two shielding plates 5 _-1, with a configuration of repeating _5-2, each of the shield plate 5 _{-1, 5-2} The currents that flow through are far from each other. Thereby, the shielding effect of the shielding operation part 5 becomes higher.
[0037]
Although detailed illustration and description are omitted, electromagnetic waves are not transmitted between the lid 1b and the shielding operation unit 5 or between the two shielding plates 5 _-1 and 5 _-2. Yes.
[0038]
In the present embodiment, first, the lid 1b of the shield box 1 is opened, and the mobile phone 2 is placed on the table 10 in the housing 1a. At this time, the cellular phone 2 is placed at a predetermined position, and the antenna 2a of the cellular phone 2 and the measurement dipole antenna 11 are opposed to each other in a predetermined positional relationship.
[0039]
As described above, a mat such as silicon resin is placed on the upper surface of the upper table 10a of the table 10. Since this silicon resin mat has a very large coefficient of friction on the surface, the placed mobile phone 2 is generally fixed.
[0040]
Next, by closing the lid 1b of the shield box 1, the mobile phone 2 is shielded from electromagnetic waves from the outside.
Thereafter, an external measuring device (not shown) is connected to the high frequency terminal 3 and the measurement of the mobile phone 2 is started.
[0041]
In this measurement, the push button 2b can be visually observed through the shielding plates 5 _-1 and 5 _-2 as described above. At the same time, any one of the push buttons 2b of the mobile phone 2 can be pressed by the tip of the operation rod 6 through any of the plurality of small holes 5a, 5a... Provided in the shielding operation unit 5. .
[0042]
As described above, since the plurality of small holes 5a, 5a,... Can be formed by overlapping the two shielding plates 5 _-1 , 5 _-2 at a predetermined interval, the operability may be impaired. And a high shielding effect can be obtained.
[0043]
Incidentally, in the aforementioned embodiment, and distance between the shield plate _5-2 and the shielding plate 5 _-1, a plurality of small holes 5a, the inner diameter or the like of 5a · · · is the radio waves is the mobile phone 2 to be subjected to measurement using Determined by frequency and the like.
[0044]
FIG. 2 is a side sectional view showing a detailed configuration of another example of the shielding operation unit 5 shown in FIG. In the configuration shown in FIG. 2 (a), the shield plate 5 _-1 small holes 5a _-1 which has, 5a _-1 · · · and the shielding plate 5 small holes 5a _-2 has _-2, and 5a _-2 · · · Then they are out of center.
With this configuration, a higher shielding effect can be obtained in the shielding operation unit 5.
[0045]
While Figure 2 in the configuration shown in (b), the shielding plate 5 _-1 small holes 5a _-1 which has, 5a _-1 · · · and the shielding plate 5 small holes 5a _-2 has _-2, 5a _-2 ··· And have different inner diameters. In the configuration shown in FIG. 2B, the inner diameters of the small holes 5a- ₂ , 5a- _2, ... Are larger than the inner diameters of the small holes 5a- ₁ , 5a- ₁ ,.
With this configuration, the operating angle range by the operating rod 6 is widened, and the operation (pressing) of the push button 2b of the mobile phone 2 becomes easier.
[0046]
In addition, according to the configuration shown in FIG. 2B, since the operating angle range by the operating rod 6 is widened, it is possible to operate a plurality of push buttons 2b from one small hole 5a.
Therefore, the number of small holes 5a, 5a,... Formed in the shielding operation portion 5 can be reduced, and the shielding effect can be further enhanced by doing so.
[0047]
Of course, in the configuration shown in FIG. 2 (b), as in the configuration shown in FIG. 2 (a), the small holes 5a _-1 with the shielding plates 5 _-1 and 5a _-1 · · · and the shielding plate _5-2 The small holes 5a- ₂ , 5a- _2, ...
[0048]
2B shows an example in which the inner diameters of the small holes 5a- ₂ , 5a- _2, ... Are larger than the inner diameters of the small holes 5a- ₁ , 5a- ₁ ,. The small holes 5a- ₁ , 5a- _1, ... may have a larger inner diameter than the small holes 5a- ₂ , 5a- ₂ ,. Furthermore, in each of the corresponding combinations, it may be configured such that which of the small hole 5a- ₁ and the small hole 5a- ₂ is larger.
[0049]
In addition, the material which comprises each part demonstrated in the above-mentioned embodiment is an example, and this invention is not limited to the thing of the material quoted in these examples. The present invention can be configured in the same manner as the above-described embodiment, and can be applied to any device that can obtain an effect equal to or greater than that.
[0050]
Also, ratios, etc. of the dimension of the interval and each part of the shield plate 5 _-1 and 5 _-2 or each part of the dimension, is an example. That is, these are determined by the frequency to be measured and the like, and are not limited to those of the above-described embodiment.
[0051]
Furthermore, in the present embodiment, an example in which a mobile phone is stored and measured in a shield box has been described, but the present invention is also applicable to measurement of all mobile wireless terminals such as wireless data terminals as well as mobile phones. Is possible.
[0052]
【The invention's effect】
As described above, according to the present invention, an operation including the first shielding plate and the second shielding plate that are overlapped with a predetermined interval in the opening formed on the one end surface of the storage means. Means are attached. The operation means has conductivity, and a plurality of operation holes are formed in the first shielding plate, and a plurality of operation holes are formed in the second shielding plate correspondingly, The inside of the storage means is effectively electromagnetically shielded, and the push button of the wireless terminal placed on the placement means in the storage means can be operated by an operating rod or the like through the operation hole. The operation means has translucency. Moreover, the center position has shifted | deviated by the some operation hole which the 1st shielding board has, and the some operation hole which the 2nd shielding board has. Furthermore, since the inner diameter dimensions are different between the plurality of operation holes formed in the first shielding plate and the plurality of operation holes formed in the second shielding plate, the push button of the specimen is easily operated. The excellent operability that can be achieved and the effect that a shield box having a high shielding action that prevents mutual influence between the specimen and the neighboring base station and the like can be realized.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a configuration of a shield box 1 according to an embodiment of the present invention.
FIG. 2 is a side sectional view showing a detailed configuration of another example of the shielding operation unit 5 shown in FIG. 1;
FIG. 3 is a perspective view showing an overall configuration of a conventional shield box.
4 is a perspective view showing a detailed configuration of a window 104 portion in the shield box shown in FIG. 3. FIG.
[Explanation of symbols]
1 Shield box (storage means)
1a Case (storage means)
1b Lid (storage means)
2 Mobile phone (wireless terminal)
2a Antenna (Transceiver antenna)
2b Push button 3 High frequency terminal 5 Shielding operation part (operation means)
5 _-1 shielding plate (first shielding plate)
_5-2 shielding plate (second shielding plate)
5a, 5a- ₁ , 5a- ₂ small hole (operation hole)
10 Table (mounting means)
10a Upper base (mounting means)
11 Dipole antenna (measuring antenna)

Claims (5)

Conductive storage means (1, 1a, 1b) for storing a wireless terminal (2) having a transmitting / receiving antenna (2a) and a push button (2b);
Mounting means (10, 10a) mounted in the storage means for mounting the wireless terminal;
Conductive operation means (5) attached to a position opposite to the push button of the wireless terminal placed on the placement means on one end face of the storage means,
The operating means includes a first shielding plate (5 _-1 ) and a second shielding plate ( _5-2 ), each having a plurality of operation holes (5a), and are stacked at a predetermined interval. Shield box characterized by that. The shield box according to claim 1, wherein the operation unit is formed of a material having translucency. The plurality of operation holes (5a _-1 ) provided in the first shielding plate and the plurality of operation holes (5a _-2 ) provided in the second shielding plate corresponding to each of the operation holes (5a _-1 ) have their respective center positions. The shield box according to claim 1, wherein the shield box is formed differently. The plurality of operation holes formed in the first shielding plate and the corresponding operation holes formed in the second shielding plate have different inner diameters. The shield box according to any one of claims 1 to 3. A measurement antenna (11) mounted in the storage means for transmitting electromagnetic waves to the transmission / reception antenna and receiving electromagnetic waves from the transmission / reception antenna;
The shield according to any one of claims 1 to 4, further comprising a high frequency terminal (3) attached to the one end surface or the other end surface of the storage means and connected to the measurement antenna. box.

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