JP3050934U - Shield covers and shield curtains for personal computers, electronic medical equipment, etc. using electromagnetic wave shielding nets - Google Patents

Abstract

(57) [Summary] [Problem] Electromagnetic waves that are hard to get dirty and hard to notice even when soiled, are flexible, transparent and visible, have antibacterial properties, and also prevent static electricity. An object of the present invention is to provide a personal computer net or a shield curtain using a shielding net. The monitor cover of a personal computer or the like of the present invention is:
Conductive fibers are knitted into a mesh with a stitch roughness of 1.5 mm or less by tricot knitting, and the stitches are kept constant by the vertical and horizontal fibers of the stitches restraining each other's movement. The upper surface, the rear surface, and both side surfaces of a monitor such as a personal computer are covered by using an electromagnetic wave shielding net. By using the above-mentioned electromagnetic wave shielding net, a shield cover of a personal computer main body and a shield cover of an imaging device and an electronic medical device are also realized. In the shield curtain of the present invention, the conductive fibers are knitted in a tricot knit into a mesh shape having a stitch roughness of 1.5 mm or less, and the vertical and horizontal fibers of the stitch restrain each other's movement. This curtain is made up of an electromagnetic wave shielding net with a constant roughness and shields rooms and the like in a building from electromagnetic waves.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention shields radio waves generated from personal computers and workstations, electromagnetic waves such as microwaves (ultra-high frequency waves), and shields covers for personal computers, electronic medical devices, etc. using an electromagnetic wave shielding net for preventing static electricity. And curtains for shielding rooms in buildings from electromagnetic waves.

[0002]

[Prior art]

 Recently, the danger that high-frequency electromagnetic waves generated from home appliances around the human body may harm human cells or the immune system has been regarded as a problem, and research has begun. In particular, monitors and main units of personal computers and workstations use high-voltage power supplies, and it is estimated that harmful electromagnetic waves are generated frequently. On the other hand, operators of personal computers and the like often perform keyboard operations all day long, and the degree of harm is so great that they are worried. Electromagnetic wave monitor screens are already on the market to reduce electromagnetic waves that may affect the human body. However, electromagnetic waves are emitted not only from the front of the monitor, but also from the back and sides.

Also, personal computers and the like often cause bugs due to static electricity, and static electricity prevention is necessary for stable personal computer operation. It is known that a monitor is liable to be charged with static electricity under the influence of a high-voltage power supply, and malfunctions when the static electricity enters a memory or a CPU via a person or the like. Particularly in a software development company or in an environment where monitors such as dealing rooms are densely lined up, the above problems are serious and affect work efficiency. Similar to the above monitors, problems of electromagnetic interference have been pointed out in TV receivers in ordinary households.

In addition, inside a hospital or the like, there are life-sustaining devices such as ventilators and pacemakers for patients who are easily affected by electromagnetic waves, various monitoring devices such as electrocardiograms, and inspection devices. The treatment room needs to block electromagnetic waves emitted from mobile phones and various high-voltage devices. In order to prevent malfunctions of control devices, it is necessary to block electromagnetic waves in the electronic control engine of airplanes and automobiles. However, there has been no simple and inexpensive shield material having such a large area.

[0005] Furthermore, video photographing equipment is digitized and is easily affected by disturbance, and the influence of external noise is caused by disturbance of an image pickup screen. Conventionally, there has been no appropriate cover to prevent such disturbance.

As products to prevent such harmful electromagnetic waves, there are OA apron using cloth coated with nickel on polyester, cloth of metal fiber, transparent hard plastic VDT (Video Display Terminal) filter, and the like. Are sold.

However, metal fiber fabrics are generally expensive, lack transparency, and are often thick. Covers for personal computer monitors and medical equipment, or curtains that shield electromagnetic waves in rooms in buildings, etc., have a large area to block electromagnetic waves, so using the above metal fiber fabric increases the cost required to block electromagnetic waves. . Further, the fabric has a drawback that dirt is easily adhered and the dirt is conspicuous. In order to solve the cost problem mentioned above, it is conceivable to reduce the amount of metal fibers by coarsely weaving the fabric in a mesh shape.However, if the weave is coarse, the metal fibers move vertically and horizontally, causing misalignment. Easy. Therefore, the conventional mesh has a drawback that it is not possible to maintain the 1.5 mm mesh roughness, which has been experimentally found to provide a sufficient electromagnetic wave shielding effect. In addition, the above plastics are generally hard and inflexible and are not suitable for covering the entire PC monitor.

[0008]

[Problems to be solved by the invention]

 The present invention has been made in order to solve such a problem, and a tricot knitting machine has been proposed in which conductive fibers are knitted in a mesh shape having a stitch roughness of 1.5 mm or less. It is possible to knit with a general knitting machine such as the above, and the amount of fiber used is small.Therefore, even when the area that blocks electromagnetic waves is large, such as a computer monitor cover or a shield curtain in a room, etc. The cost is low, and the vertical and horizontal stitches of the stitches constrain the movement of each other, so that the coarseness of the stitches is kept constant. Furthermore, the conductivity of the fibers entangled at the intersection of the stitches reflects and absorbs electromagnetic waves. Inexpensive and durable shield cover for personal computer monitor, shield cover for personal computer, etc. Shield cover of electronic devices such as image equipment and medical equipment, to provide a shield curtain, such as the room for the purpose.

In addition, the present invention uses an electromagnetic wave shielding net in which conductive fibers are twisted and knitted in a mesh shape, so that dirt is not easily adhered and dirt is hardly conspicuous and flexible. Another object of the present invention is to provide a shield net or shield curtain for a personal computer or the like using an electromagnetic wave shielding net which is transparent, has a visible content, has antibacterial properties, and prevents static electricity.

[0010]

[Means for Solving the Problems]

 The monitor cover of the personal computer and the like of the present invention is formed by tricot knitting of conductive fibers into a mesh with a stitch roughness of 1.5 mm or less, and the vertical and horizontal stitches of the stitches restrain each other's movement. It is characterized by covering the upper surface, rear surface and both side surfaces of monitors such as personal computers using an electromagnetic wave shielding net whose eye roughness is kept constant.

In the shield cover of the personal computer body of the present invention, the conductive fiber is knitted in a tricot knit into a mesh shape with a stitch roughness of 1.5 mm or less, and the vertical and horizontal fibers of the stitch are mutually joined. It is characterized by covering the whole PC body using an electromagnetic wave shielding net that keeps the roughness of the eyes constant by restricting the movement.

Further, the shield cover of the video photographing device of the present invention is characterized in that conductive fibers are knitted in a tricot knit into a mesh shape with a stitch roughness of 1.5 mm or less, and the vertical and horizontal fibers of the stitches are connected to each other. It is characterized by using an electromagnetic wave shielding net whose eye roughness is kept constant by constraining the movement of the camera and covering the whole of the video photographing equipment.

[0013] In the shield cover of the electronic medical device of the present invention, the conductive fibers are knitted in a tricot knit into a mesh having a stitch roughness of 1.5 mm or less. It is characterized by using an electromagnetic wave shielding net whose eye roughness is kept constant by constraining the movement of the medical device and covering the entire medical device such as an infusion pump.

Further, in the shield curtain of the present invention, the conductive fibers are knitted in a tricot knit into a mesh shape having a stitch roughness of 1.5 mm or less, and the vertical and horizontal fibers of the stitches move together. It is composed of an electromagnetic wave shielding net whose mesh is kept constant by restraining it, and it is characterized by shielding electromagnetic waves in rooms in buildings.

Further, in the shield cover or the shield curtain, the conductive fiber is knitted by using a twisted yarn of two or more silver-plated single fibers. It is a feature.

The above-mentioned electromagnetic wave shielding net can be knitted by a general knitting machine such as a tricot knitting machine, uses a small amount of fiber, and blocks electromagnetic waves like a monitor of a personal computer or a shielded curtain. The cost is low even when the area to perform is large. In addition, the vertical and horizontal fibers of the stitch restrain each other's movement, so that the coarseness of the eye is maintained constant. In addition, the conductivity of the fibers entangled at the intersection of the stitches increases the amount of electromagnetic wave reflection and absorption, and the effect of blocking electromagnetic waves is high. Furthermore, it has a function of discharging static electricity to a monitor or the like, which easily generates static electricity, by using a high-voltage power supply. In addition, since the above-mentioned fibers are silver-plated single fibers, they have high antibacterial properties, and are most suitable for use in hospitals and the like. Further, since the conductive fiber is knitted by using a twisted yarn on two or more silver-plated single fibers, the yarn becomes coil-shaped and the surface area increases, As a result, the amount of reflection and absorption of electromagnetic waves increases, and the effect of blocking electromagnetic waves is high.

[0017]

[Embodiment of the invention]

 FIG. 6 is an enlarged view of the electromagnetic wave shielding net used for the shield cover or the shield curtain of the personal computer and the like of the present invention. This electromagnetic wave shielding net 1 is made of a conductive fiber such as metal fiber (silver, copper, nickel, etc.) or carbon fiber of micron order, which is a fiber yarn to be an electromagnetic wave shielding material, and a synthetic material such as polyester to be a base material. It is knitted with a common knitting machine such as a tricot knitting machine using a conductive twisted yarn twisted with a fiber yarn or a twisted yarn obtained by twisting two or more silver-plated single fibers. The stitch roughness is a roughness of 1.5 mm or less, which has been experimentally found to provide a sufficient electromagnetic wave shielding effect. When the net is made by tricot knitting, one net can be made hexagonal as shown in Fig. 6 and the net can be seen through. In this net, the vertical and horizontal fibers of the stitch restrain the movement of each other, so that the coarseness of the mesh is maintained at a constant level, and the net does not collapse. In extreme cases, the shape of the net is maintained even if it is partially cut, and does not come loose. On the other hand, as is apparent from the enlarged view of the knitting shown in FIG. 7, in the case of the knitting, there is a disadvantage that if one portion is cut, the knitting is immediately released from the vicinity.

Further, as described above, since the net can be made by a general tricot knitting machine, the manufacturing cost of the net is very low. Furthermore, since the net is transparent enough to be seen through, the amount of expensive metal fiber yarn used is far less than that of cloth. That is, the above-described net has an excellent feature that it can be made very inexpensively as an electromagnetic wave shielding material as compared with a conventional electromagnetic wave shielding material (such as cloth).

The electromagnetic wave blocking net attenuates only the electric field by about 99% in the low frequency band (50 to several thousand kHz), and attenuates both the electric field and the magnetic field by about 98% in the high frequency band (100 MHz to). The use of the PC cover of the present invention can reduce the effects of electromagnetic noise generated from electronic devices, thus reducing monitor screen disturbance and speaker noise. Further, when used in a video imaging device, it is possible to prevent disturbance of the imaging screen due to the influence of external noise. In addition, malfunctions caused by electromagnetic waves radiated from mobile phones and various high-voltage devices to life support devices such as artificial respirators and pacemakers, intravenous pumps and various monitor devices inside hospitals and the like can be blocked.

A second advantage of the net is that it has conductivity (surface electrical resistivity of 0.05 ohm / sq. Or less) and thus has an action of releasing static electricity (antistatic effect). In computers, memory is known to be susceptible to static electricity, and the contents of the memory may be corrupted or, in extreme cases, the memory itself may be destroyed. If static electricity enters computer memory from human hands, it is easy to imagine that the contents of the memory will change and cause bugs. By hanging the net cover of this invention on a monitor such as a personal computer, the static electricity generated from the high-voltage power supply of the monitor can be released to the ground. It is possible to prevent a malfunction that may occur. In addition, the absorption of dust and cigarette smoke due to the charging is prevented, so that the function of the device is prevented from deteriorating due to dust and the trouble of cleaning can be saved.

The third advantage of the above-mentioned net is that the material of the net is “twisted yarn obtained by twisting a silver-plated single fiber” (a silver alloy is coated on a polyester fiber). The point is that a metal part is raised on the surface. It is well known that metals have bactericidal activity. Therefore, if the surface of the net is, for example, silver-plated, it is always kept clean by the sterilizing effect of silver. Also, when a silver-plated twisted yarn is used, the net itself has the characteristic that it is difficult for the net itself to be discolored or deteriorated, since silver is less likely to rust.

A fourth advantage of the above-mentioned net is that, as a material for making a personal computer cover or the like, the net is flexible, can be processed into a desired shape, and can be cut into a desired shape. At the same time, it is light and transparent, and is air-permeable because of the net. For example, even when used for the above-mentioned monitor cover, there is no heat inside. In the case of a personal computer cover that covers the computer itself, this ventilation is an important factor in preventing thermal runaway of the computer. There is also a characteristic that the fitting property is good because of the flexibility. In particular, if it is necessary to hang the electromagnetic wave shield cover in a limited space, it is possible to use a net to attach the device to the equipment according to the space. That is, it can be easily attached and detached, and does not need to be attached or detached. In addition, because of its elasticity, it can handle from 14 inches to 17 inches in one size. In addition, the internal state can be seen through the Internet, which is convenient for work.

This is also a preferable point as a curtain material. Since it is a net, it is light and flexible, so it has almost the same feel as a lace curtain, and it is easy to open and close. In addition, it is durable because it is tricot knitting, so it is not easily frayed and the stitch does not collapse even when pulled.

Furthermore, it is more preferable that the semi-finished product of the electromagnetic wave shielding net 2 knitted as described above is dyed by spraying a black acrylic dye containing a solvent, for example. The polyester fiber of the base material is melted by the solvent of the dye, and then solidified to fix the stitches of the electromagnetic wave shielding net 2. The color for dyeing the electromagnetic wave shielding net 2 may be other than black, and an acrylic dye may be sprayed only for the purpose of solidifying the stitch without dyeing.

The electromagnetic wave shielding net and the electromagnetic wave shielding material of the present invention as described above have the function of the electromagnetic wave shielding net 2 having a coarseness of 1.5 mm or less reflecting or absorbing electromagnetic waves and converting it to heat energy. It blocks microwaves of 200 MHz or more by 97 to 98%. However, with a roughness of 1.5 mm or more, the shielding effect decreases in proportion to the size of the eyes.

FIGS. 2 and 3 show an embodiment of the personal computer monitor cover of the present invention. In the drawing, 1 is the electromagnetic wave shielding net, 2 is a rubber-like elastic cord, and the net has been subjected to a piping treatment. Reference numeral 3 denotes a belt connected to the elastic cord at a portion 6, and the length of the belt can be adjusted and fixed by belt tightening 4. Reference numeral 5 denotes a corner portion of the net, which is sewn with a lock sewing machine. Numeral 11 denotes a holding portion on the periphery of the bottom of the cover, which is similar to 2 and has a slightly thin rubber-like elastic cord, which is subjected to piping processing on the net. Reference numeral 8 denotes a ground terminal, which has a clip 9 attached to the tip thereof, and is clipped to an appropriate ground point. The ground 8 has a role of discharging static electricity.

The personal computer cover is mounted so as to cover the top, side, and back of the monitor 10 as shown in FIG. After mounting, it is firmly fixed with the belt 3. Further, it is desirable that the upper surface and the right and left sides 7 of the monitor are fixed with a double-sided tape material. Other electromagnetic wave shielding covers are usually attached to the front of the monitor, so that harmful electromagnetic waves generated inside the monitor are blocked in all directions except the downward direction.

In the above-described embodiment, the electromagnetic wave shielding monitor cover put on one monitor is shown. However, in a place where a plurality of monitors are arranged side by side, for example, in a dealing room, a plurality of monitors are provided. A large cover structure that can cover the monitor at once may be used.

FIGS. 4 and 5 show another embodiment of the shield cover of the monitor such as a personal computer. 4, 5, 1, 2, 3, 4, 5, etc. are the same as those in FIGS. The difference from FIGS. 2 and 3 is that the monitor shield cover is conductively integrated with the conductive monitor screen panel 11. By doing so, the monitor is completely covered with the shield cover, and electromagnetic noise and static electricity can be completely shut out.

FIGS. 8 and 9 show a case where the electromagnetic shield net is used as a shield cover of a personal computer. The structure is made similar to the monitor cover. Although not shown in the drawings, a slot is appropriately formed in a slot of a CD-ROM or a floppy disk. FIG. 10 shows a case where the electromagnetic wave shielding net is used as a shield cover of a video camera. In this case, the sheet-shaped shield net is simply used over the video camera 12. Of course, a shield cover that matches the shape of the video camera may be used. Although not shown, the shield cover for covering the various electronic devices in the hospital may be provided with the electromagnetic shield net as necessary in the same manner as the video camera shown in FIG. Over various medical devices. Of course, as in the case of the video camera, it may be formed as a shield cover according to the shape of various medical devices.

Although not specifically shown, the electromagnetic wave shielding curtain of the present invention is a curtain made by using the electromagnetic wave shielding net similarly to the above-mentioned personal computer cover and the like. Same as how to make. The material of the curtain is inexpensive, has an excellent electromagnetic wave blocking effect, and has an antistatic effect and an antibacterial effect. The "conductive fiber is a tricot knitted mesh having a stitch roughness of 1.5 mm or less. It is characterized by using an “electromagnetic wave shielding net” in which the vertical and horizontal fibers of the knitted stitch restrain each other's movement so that the roughness of the stitch is kept constant.

As one application example of the electromagnetic wave shielding curtain of the present invention, it is conceivable to use the electromagnetic wave shielding curtain in combination with a jammer generator for preventing reception of a mobile phone in a hall or the like. For example, in a metropolitan area such as Tokyo, a transmitting antenna of a mobile phone is attached, and the transmitting antenna is provided near a hall or a conference room (for example, outside a window) where the reception of the mobile phone is desired to be prevented. Due to the strong reception intensity, the jammer generator may not function effectively. In such a case, by covering the window of the hall or the like with the electromagnetic wave shielding curtain of the present invention, the electric wave of the transmitting antenna can be cut off, and the interfering wave generator can function effectively. On the other hand, if the outside of the window, such as the hall where the jammer is installed, is a station plaza, etc., the mobile phone cannot receive / transmit outside the window due to the radio wave of the jammer leaked outside. This is a violation of the Radio Law. In this case as well, the above problem is solved by covering the windows and the like with the electromagnetic wave shielding curtain of the present invention so as to block the radio waves of the above-mentioned interference radio wave generator and prevent the radio waves of the above-mentioned interference radio wave generator from leaking outside. Will be resolved. That is, when using a jammer for preventing reception of the above-mentioned mobile phone in a hall or the like, it is extremely effective to use the electromagnetic wave shielding curtain of the present invention together.

[0033]

[Effect of the invention]

 As described above, the monitor cover of the personal computer and the like of the present invention blocks electromagnetic waves such as radio waves and microwaves (ultra-high frequency waves) generated from a personal computer or a work station, and effectively prevents static electricity. Moreover, since the conductive fibers are knitted in a mesh shape as a material for blocking electromagnetic waves, they can be knitted by a general knitting machine such as a tricot knitting machine, and the amount of fibers used is small. The characteristic is that the cost is low even when the area for blocking the air is large. In addition, the above-mentioned electromagnetic wave shielding net keeps the stitch coarseness by keeping the vertical and horizontal stitches of the stitches from each other, preventing them from fraying, being resistant to pulling, and entangled at the stitch intersection. Due to the conductivity of the fibers, the amount of reflection and absorption of electromagnetic waves is increased, and an excellent effect of blocking electromagnetic waves is obtained. Further, the monitor cover has flexibility, and also has an antistatic effect and an antibacterial effect. Therefore, it has excellent fit, is hardly dusty, and prevents malfunction of the personal computer. The same effects as described above can also be obtained when used as a shield cover for a personal computer, a shield cover for a video camera, or a shield cover for an electronic medical device.

Also, since the electromagnetic wave shielding curtain of the present invention uses the above-mentioned electromagnetic wave shielding net, it is transparent, inexpensive, has an antistatic effect and an antibacterial effect, is flexible, and is not easily stained. In particular, it is excellent as an electromagnetic wave prevention curtain for an intensive care unit or the like, which is particularly susceptible to external electromagnetic waves in hospitals and the like, and in which malfunctions have serious consequences.

[Brief description of the drawings]

FIG. 1 is a view showing a monitor with an electromagnetic wave shield cover such as a personal computer monitor of the present invention.

FIG. 2 is a diagram illustrating an extracted electromagnetic wave shield cover when the personal computer / monitor of the present invention is mounted.

FIG. 3 is an overall view of an electromagnetic wave shield cover of a personal computer, a monitor, etc. of the present invention.

FIG. 4 is a view showing another embodiment of the electromagnetic wave shield cover such as a personal computer monitor of the present invention mounted on a monitor.

FIG. 5 is an overall view of another embodiment of the electromagnetic wave shield cover such as a personal computer monitor of the present invention.

FIG. 6 is an enlarged view of an electromagnetic wave shielding net used for an electromagnetic wave shielding cover and an electromagnetic wave shielding curtain of a personal computer and a monitor of the present invention.

FIG. 7 is an enlarged view of knitting.

FIG. 8 is an overall view of an embodiment of the electromagnetic wave shield cover of the personal computer body of the present invention.

FIG. 9 is an overall view of another embodiment of the electromagnetic wave shielding cover of the personal computer body of the present invention.

FIG. 10 shows the electromagnetic shielding of the video camera of the present invention.
1 is an overall view of an embodiment of a cover.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electromagnetic wave shielding net 2 Rubbery elastic cord 3 Belt 4 Belt tightening 8 Ground 10 Monitor 11 Monitor screen panel

Claims (6)

[Utility model registration claims] 1. A fiber having conductivity is knitted by tricot knitting into a mesh having a stitch roughness of 1.5 mm or less,
By using an electromagnetic wave shielding net where the coarseness of the eyes is kept constant by the fibers of the stitches vertical and horizontal restraining the movement of each other,
A shield cover for monitors such as personal computers, which covers the top, rear and both sides of monitors such as personal computers. 2. The conductive fiber is knitted in a tricot knit into a mesh having a stitch roughness of 1.5 mm or less,
By using an electromagnetic wave shielding net where the coarseness of the eyes is kept constant by the fibers of the stitches vertical and horizontal restraining the movement of each other,
A shield cover for the personal computer, which covers the entire personal computer. 3. The conductive fiber is knitted into a mesh having a stitch roughness of 1.5 mm or less by tricot knitting.
By using an electromagnetic wave shielding net where the coarseness of the eyes is kept constant by the fibers of the stitches vertical and horizontal restraining the movement of each other,
A shield cover for a video camera, which covers the entire video camera. 4. The conductive fiber is knitted in a tricot knit into a mesh having a stitch roughness of 1.5 mm or less,
By using an electromagnetic wave shielding net where the coarseness of the eyes is kept constant by the fibers of the stitches vertical and horizontal restraining the movement of each other,
A shield cover for an electronic medical device, which covers the entire medical device such as a drip pump. 5. The conductive fiber is knitted in a tricot knit into a mesh having a stitch roughness of 1.5 mm or less,
A shield curtain comprising an electromagnetic wave shielding net in which the vertical and horizontal fibers of the stitches restrain each other's movement to keep the coarseness of the mesh constant, and which shields a room or the like in a building from electromagnetic waves. 6. The conductive fiber according to claim 1, wherein the conductive fiber is formed by knitting two or more silver-plated single fibers with a twisted yarn. A shield cover or a shield curtain according to any one of the preceding claims.