JP3027111B2 - Electromagnetic wave shield cover - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave shield cover, and more particularly to an electromagnetic wave shield cover for shielding an electromagnetic wave generated from inside and / or outside of an electronic / electric device using a conductive sheet woven with a conductive material. About.

[0002]

2. Description of the Related Art In today's daily life, various electronic and electric devices are used everywhere, and electromagnetic waves of various frequencies and energies are filled around us. Therefore, in various fields, such "noise"
It is important to consider the effect of electromagnetic interference on the environment. In particular, in a video shooting studio or the like, electromagnetic waves leaking from various operation devices or devices tend to affect a shooting camera and cause noise, making it difficult to obtain good images.

[0003] Various attempts have been made to solve such problems. For example, as a countermeasure to prevent unwanted radio waves from being emitted to the outside of electronic devices that generate unnecessary radio waves during operation, a metal plate (permalloy) or the like may be used to cover a portion of the housing of the electronic device that is considered to be the source of the disturbance waves. Alternatively, a method of coating the inside of a side plate of a housing with a metal material is generally used. Further, using a sheet in which conductive fibers are woven, a portion considered to be a source of jamming radio waves of the device is covered (for example, Japanese Utility Model Application Laid-Open No. 4-1).
No. 0388) or a method in which a nonwoven fiber fabric coated with a conductive material is used as a shield cover (for example, JP-A-4-36597).

[0004]

However, each of these methods is a method for partially coping with the structure of an electronic device, and the electromagnetic wave shielding effect is insufficient. In particular, when processing is performed inside the housing of an electronic device, there is a problem that the structure is liable to be subject to manufacturing restrictions due to space issues. Further, these are for preventing electromagnetic waves generated from the electronic device itself, for example, for protecting a device which is easily affected by external electromagnetic waves such as a photographing camera from the external electromagnetic waves. Was not the solution.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide an electromagnetic wave shield cover that can efficiently block electromagnetic waves from inside and / or outside and can be used easily. .

[0006]

Means for Solving the Problems (1) In order to solve the above-mentioned problems, an electromagnetic wave shield cover of the present invention provides an electromagnetic wave generated from inside and outside of a television camera having a lens unit and a viewfinder unit. An electromagnetic wave shielding cover for shielding, comprising: (a) a conductive sheet processed to a predetermined shape and woven with a conductive material; and (b) the conductive sheet is mounted on a casing of the television camera. And an engaging means for detachably engaging.

(2) Another electromagnetic wave shield cover of the present invention is an electromagnetic wave shield cover for shielding electromagnetic waves generated from inside and outside of a portable small camera, and (a) processed to a predetermined shape. And (b) engaging means for detachably engaging the conductive sheet with a housing of the portable small-size camera. .

(3) Furthermore, the cold and waterproof electromagnetic wave shield cover of the present invention is characterized in that the electromagnetic wave shield cover according to (1) or (2) above.
The conductive sheet is a waterproof sheet sandwiching the insulation
It is provided on the outer surface.

(4) Furthermore, the electromagnetic wave shielding cover for awning of the present invention is described in (1) or (2) above.
When the conductive sheet has a awning effect,
It is characterized in that it is provided on a surface.

( 5 ) In the electromagnetic wave shield cover according to any one of the above (1) to (4) , at least one opening may be formed.

( 6 ) In the electromagnetic wave shielding cover according to the above (1) , the electromagnetic wave shielding cover further includes a cylindrical portion surrounding the peripheral surfaces of the lens portion and the viewfinder portion, and an opening provided in each of the cylindrical portions. A string may be provided at a tip of the lens, and the string may be squeezed through the string so that a peripheral portion of the opening is engaged with the lens and the viewfinder.

( 7 ) In the electromagnetic wave shield cover according to the above (2) , the predetermined shape is a box, and an L-shape surrounding a lens part peripheral surface and a view finder part peripheral surface in a front part. A cylindrical portion may be provided, and a cylindrical portion surrounding the cable output portion may be provided at a rear portion.

( 8 ) In the electromagnetic wave shield cover according to any one of the above (1) to ( 7 ), the engaging means may be made of at least one magic tape.

( 9 ) In any one of the above (1) to ( 8 ), the electromagnetic wave shield cover may be provided with a grounding means.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The electromagnetic wave shield cover according to the present invention blocks electromagnetic waves generated from inside and / or outside of electronic and electric equipment, and (a) is processed into a predetermined shape and is conductive. And (b) engaging means for detachably engaging the conductive sheet with a housing of the electronic / electric device.

The term "blocking" or "shielding" as used in the present invention includes not only blocking 100% of electromagnetic waves but also blocking electromagnetic waves on electronic and electric equipment to an negligible degree. I do.

The conductive sheet used in the shield cover of the present invention can be made of any material as long as it is a fibrous fabric woven with a conductive material.
For example, fabrics manufactured by weaving silver as a conductive material into nylon fibers have good conductivity, and
It is thin, flexible, lightweight, and can be processed into any shape simply by sewing (eg, with a sewing machine). A shield cover manufactured using a sheet made of such a material is easily fitted to a housing of any shape and is convenient to carry. Therefore,
It is particularly preferably used as the shielding material of the present invention. As such a sheet, specifically, Comelic (Chomerics)
merics) Shield Fabric (Shield Fabric)
k) C-7020-1 and C-25694.

In the present invention, the method for processing the sheet into a desired shape is not particularly limited. Preferably, the sheet is processed by sewing, and more preferably, a cut end portion of the sheet is subjected to a so-called piping process (wrapping with a bias tape or the like). In this case, as the suture thread and the piping tape, any material may be used as long as the sheet can be processed into a predetermined form, and examples thereof include nylon and cotton. However, it is most preferable to use a thread or a piping tape made of a conductive material.

In the shield cover of the present invention, the joining means is not particularly limited, and any means can be adopted as long as the shield cover of the present invention can be mounted so as to fit in the housing. For example, when a magic tape is used to open and close the opening or the hem of the shield cover, the adjustment width can be adjusted freely to some extent, which is advantageous. Further, it is more preferable to provide the magic tape at a plurality of locations, since the range of adjustment is further expanded.
In addition to the magic tape, engagement means such as a fastener, a button, and a snap may be used. In particular, in the opening, a string passing portion is provided, and by squeezing the string through the string passing opening or passing the rubber, the opening can be engaged with a desired width (or diameter). Any material may be used for the engaging means, but it is preferably conductive, and more preferably lightweight. When the shield cover of the present invention is held on the housing by the engagement means, it is particularly preferable to make the shield cover as close as possible to the housing from the viewpoint of protecting the housing from external electromagnetic interference.

In the present invention, the electromagnetic wave shield cover preferably has at least one or more openings. Here, the opening means, for example, when a television camera is used as an electronic / electric device, such as a lens portion or a view finder portion, which functions as an electronic / electric device and is exposed to the outside. Are portions for exposing necessary portions, and are called, for example, a lens hood portion, a view finder hood portion, and the like.
Alternatively, the opening is a bottom opened in a box-shaped conductive sheet. For example, in a portable small camera or the like, a photographer's hand for holding the camera from the opening in the bottom is used. Is to be inserted.

These openings may or may not be in close contact with the main body of the housing. However, preferably, the opening is engaged so as to be in close contact with the housing by the engagement means, so that the shield member comes into further close contact with the housing body. The engaging means is achieved, for example, by sewing a magic tape to the shield material and bonding it, or by providing a string passing portion through the shield material by sewing, and squeezing the string through the portion.

Further, it is preferable that the shield cover of the present invention has a grounding means for grounding an external electromagnetic wave applied to the shield material made of a conductive material. Such a grounding means is for preventing the electromagnetic wave transmitted to the shield cover from being transmitted to the housing and escaping from the shield cover. Good. For example, the grounding means may be made of the same material as the shield cover, formed in a strip shape, and bound so as to hang down on a part of the shield cover. In addition, by providing eyelets on this grounding means, not only grounding,
A role may be added so that the shield cover can be held outside the housing, for example, on a tripod for a camera.

The electromagnetic wave shield cover of the present invention having the above-described structure is applied to a device which is easily affected by an electromagnetic wave generated from the outside. Applicable housings of the shield cover of the present invention include, for example, cameras, various OA
Devices and the like may be mentioned, and they may be large, such as fixed, or small, portable.

The electromagnetic wave shield cover of the present invention can be used to produce a multifunctional shield cover by combining the above materials with a material having another function. For example, as shown in FIG. 1A, a shield cover is manufactured by further combining a conductive sheet 1 used for a shield cover of the present invention with a cloth in which a heat insulating material 2 and a waterproof chemical fiber 3 are combined, By attaching this shield cover to the housing such that the waterproof chemical fiber 3 is on the outside, it is possible to further impart heat retention and waterproofness. The shield cover manufactured in this way is useful as a cover having a cold-proof effect and a water-proof effect in addition to an electromagnetic wave blocking function, for example, under snowfall conditions. Further, as shown in FIG. 1B, a conductive sheet 1 used for the shield cover of the present invention is combined with a thick cloth 4 such as a tent cloth to provide a cover having a sunshade effect. It is effectively used for photography cameras in regions and the like. When used as a sunshade cover, preferably, an appropriate space is provided between the device and the cover to mount the cover to prevent an increase in the temperature inside the cover.

The shield cover of the present invention having the above-described structure can be easily installed while being in close contact with the housing of the target electronic / electric equipment, and has a sufficient electromagnetic wave shielding effect. Therefore, this shield cover is simple and useful for portable use.

The shield cover of the present invention will be specifically described with reference to the following examples. However, the invention is not limited to these examples.

Example 1 A shield cover of a television camera as shown in FIG. 2 was manufactured using a sheet (commerics; shield fabric C-7072-1) in which silver fibers were woven into nylon cloth. did. FIG.
2A is a side perspective view when the shield cover of the present invention is mounted on a camera, and FIG. 2B is a rear perspective view thereof. The shield cover 20 according to the present embodiment has a lens hood cover 21, a viewfinder cover 22, and a skirt as openings. A string passing portion is formed at each of the distal ends of the lens hood covering portion 21 and the viewfinder covering portion 22 so that the string can be squeezed through the string passing portion. The upper part of the shield cover 20 on the side of the viewfinder 26 is provided with a space so that the viewfinder of the camera can move up and down. The bottom of the shield cover 20 has a magic tape 24 so that the shield cover 20 can be held by a camera. A grounding means 23 was sewn to the shield cover 20 in the shape of a strip using the same material. The grounding means 23 has an eyelet, and the eyelet portion enables the shield cover 20 to be connected to a tripod provided for the camera.

Example 2 Using the same material as in Example 1, a box-shaped shield cover for a portable small camera as shown in FIG. 3 was manufactured. The shield cover 30 according to the present embodiment has a lens cover 31 on the front end face and L on the side face.
A letter-shaped viewfinder covering portion 32 and a cable output portion covering portion 33 were formed on the rear end surface. The distal ends of the lens cover 31, the viewfinder cover 32, and the cable output cover 33 of the shield cover 30 are respectively a lens unit,
A string pass was formed to allow the string to penetrate the viewfinder section and the cable output section so as to be able to be in close contact with the cable output section.

In the first and second embodiments, by covering the camera with the shield cover of the present invention, 100 MHZ is obtained.
The radio wave intensity was reduced to about 1/10 at a frequency near z.

[0030]

As is apparent from the above description, the electromagnetic wave shield cover according to the present invention is characterized by having a conductive sheet and an engaging means that can be processed to a predetermined shape, so that various types are provided. It can be processed into a shape. By covering the electronic / electric device with the shield cover manufactured in this way, it is possible to simply and efficiently block electromagnetic interference from inside and / or outside the electronic / electric device.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example in which a conductive sheet used for an electromagnetic wave shield cover of the present invention is combined with a material having another function.

FIG. 2 is a view showing an electromagnetic wave shielding cover applied to an indoor camera for photographing television, which is one specific example of the present invention. FIG. 2 (a) is a side perspective view when attached to the camera, and FIG. Is a rear perspective view.

FIG. 3 is a perspective view of an electromagnetic wave shield cover applied to a portable small camera as another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conductive sheet 2 Heat insulating material 3 Waterproof chemical fiber 4 Tent fabric 20 Shield cover 21 Lens hood covering part 22 View finder covering part 23 Grounding means with eyelets 24 Magic tape 25 Camera body 26 View finder part 30 Shield cover 31 Lens covering part 32 Viewfinder covering part 33 Cable output part covering part 34, 34 'Velcro 35 Camera body

Continuation of the front page (56) References JP-A-7-202466 (JP, A) JP-A 58-27998 (JP, U) JP-A 50-20504 (JP, U) JP-A 2-73798 (JP) , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H05K 9/00

Claims (9)

(57) [Claims] 1. An electromagnetic wave shielding cover for shielding electromagnetic waves generated from inside and outside of a television camera having a lens unit and a view finder unit, comprising: (a) processed to a predetermined shape and having conductivity; An electromagnetic wave shield cover comprising: a conductive sheet in which a material is woven; and (b) engaging means for detachably engaging the conductive sheet with a housing of the television camera. 2. An electromagnetic wave shielding cover for shielding electromagnetic waves generated from inside and outside of a portable small camera, comprising: (a) a conductive sheet processed to a predetermined shape and woven with a conductive material; (B) an electromagnetic wave shield cover, comprising: an engagement means for detachably engaging the conductive sheet with a housing of the portable small camera. 3. The conductive sheet sandwiches a heat insulating material.
A contractor characterized by providing a waterproof sheet on its outer surface.
3. The electromagnetic wave shield cover according to claim 1 or 2. 4. The conductive sheet has a sunshade effect.
A sheet provided on an outer surface thereof.
3. The electromagnetic wave shield cover according to 1 or 2. 5. The electromagnetic wave shield cover as claimed in any one of claims 1 to 4, characterized in that at least one opening is formed. 6. A cylindrical portion surrounding each of the peripheral surfaces of the lens portion and the viewfinder portion, and an opening provided in each of the cylindrical portions, wherein a string is provided at a tip end of each of the openings, The electromagnetic wave shield cover according to claim 1 , wherein a peripheral portion of the opening is engaged with the lens and the viewfinder by squeezing the string through the string. 7. The container according to claim 1, wherein the predetermined shape is a box, and a front portion has a cylindrical portion surrounding a lens portion peripheral surface and an L-shaped tube portion surrounding a viewfinder portion peripheral surface, and a cable output portion at a rear portion. The electromagnetic wave shield cover according to claim 2 , comprising a cylindrical portion surrounding the electromagnetic wave shield. 8. electromagnetic shield cover according to any one of claims 1 to 7, wherein the engagement means is characterized by comprising at least one Velcro. 9. electromagnetic shield cover according to any one of claims 1-8, characterized in that grounding means are provided.