JPH02960Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a shielding tape that blocks interference waves, static electricity, etc. by shielding electronic or electrical equipment.

Conventionally, electronic devices or electrical devices, etc. have been equipped with interference waves to prevent them from malfunctioning due to interference waves or static electricity from the outside, or to prevent the electronic devices or electrical devices themselves from generating interference waves. In order to prevent the generation of static electricity, etc., the outer casing of electronic equipment, electrical equipment, etc. is made of a metal box, or
Alternatively, the outer casing portion of the electronic equipment, electrical equipment, etc. is manufactured using a resin box whose inside is coated with aluminum or copper.

However, in such conventional electronic devices, electrical devices, etc. that use metal casings, when blocking interference waves, static electricity, etc., the overall weight of the electronic devices, electrical devices, etc. increases. In particular, there are drawbacks that prevent it from being adopted in small portable electronic devices, electrical devices, and the like. In addition, when electronic equipment, electrical equipment, etc. that uses a resin box with aluminum or copper coating on the inside to block interference waves and static electricity, electronic equipment, electrical equipment, etc. are produced in small quantities. There is a problem that increases the cost when manufacturing these prototypes. Moreover, in such conventional methods, when parts of electronic equipment, electrical equipment, etc. that block interference waves, static electricity, etc. are added, changed, or modified, such additions, changes, or modifications cannot be done. There is a problem that cannot be resolved. On the other hand, in cases where shielding is required in close proximity to a circuit board, etc., there is a problem that separate short-circuit prevention measures must be taken.

As a solution to this problem,
Shield tapes described in JP-A-20000 and JP-A-58-99893 are disclosed. These tapes are multi-layered, with an insulating layer on the surface of the metal sheet and an adhesive layer on the back side. By applying such tape to electronic devices, etc., it achieves the effect of blocking electromagnetic waves, etc. It is something.

By the way, when attaching these shield tapes to an electronic device or the like having a width larger than the width of the shield tape itself, a plurality of shield tapes cut to a predetermined length are pasted side by side in parallel.
It is necessary to cover the surfaces of electronic devices, etc.

However, the conventional shielding tape
Because the left and right end faces are cut vertically and the edges of each layer are lined up on a vertical plane, it is difficult to connect adjacent metal sheets even if multiple shielding tapes are pasted side by side in parallel. . Therefore, since it is difficult to electrically connect adjacent shielding tapes, there is a problem in that each metal sheet of each shielding tape cannot be connected to ground, and as a result, the desired shielding effect is not achieved. It has the disadvantage of being insufficient.

The purpose of this invention is to solve these drawbacks of the conventional technology and make it possible to electrically connect adjacent shield tapes by simply overlapping and pasting the left and right sides of the shield tapes. It is said that

Next, this invention will be explained in detail based on examples.

1 to 3 show an embodiment of the shield tape according to this invention. Note that the first
In the drawings to FIG. 3, the same reference numerals indicate the same parts.

The shield tape 1 shown in FIG. 1 has a lower layer made of an adhesive layer 1a, a middle layer made of a thin copper plate layer 1b which is a metal sheet, and an upper layer made of a vinyl chloride resin layer 1c as an insulating material. Ru. and,
The lower layer, middle layer, and upper layer of the shield tape 1 are each formed to a predetermined thickness and are integrated.

Further, a left adhesive portion 2 and a right adhesive portion 3 having a constant length are formed at both left and right ends of the shield tape 1 in the width direction of the shield tape 1, respectively. this is,
When shielding electronic equipment, electrical equipment, etc., the left and right ends of a plurality of shield tapes 1 cut to a predetermined length are overlapped.

The shield tape 1 is flexible, and the shield tape 1 formed to a predetermined width is wound around a reel 4 and stored.

FIG. 2 shows the left adhesive part 2 of the shield tape 1.
and an enlarged view of the right adhesive part 3.

The right adhesive part 3 of the shielding tape 1 is a vinyl chloride resin layer 1 that forms the upper layer of the shielding tape 1 by a certain length in the width direction from the right end of the shielding tape 1.
c is removed to expose the thin copper plate layer 1b forming the middle layer.

Further, the left adhesive part 2 of the shield tape 1 is formed of an adhesive layer forming the lower layer of the shield tape 1 in a width direction from the left end of the shield tape 1 so as to correspond to the length of the right adhesive part 2 in the width direction. Remove 1a.
Then, the layer 1b of the thin copper plate forming the middle layer is removed by about half of the length in the width direction of the right adhesive part 3, and an adhesive with a thickness slightly thinner than the layer 1b of the thin copper plate is applied to the removed portion. A layer 1d is provided and formed.

As shown in FIG. 3, the shielding tape 1 constructed as described above has an adhesive layer 1a as the lower layer of the shielding tape 1, so it can be used on the inside of a resin box 5 for electronic or electrical equipment, etc. Can be easily attached to. The plurality of shielding tapes 1 cut into predetermined lengths are electrically connected to each other continuously in the width direction of the shielding tapes 1 on the inside 5 of the resin box for the electronic equipment or electrical equipment, etc. It can be pasted in the same state. This is due to the fact that the shield tape 1 has a right adhesive part 3 and a left adhesive part 2 (see Fig. 2).
By overlaying the left adhesive part 2 of the second shielding tape 1 on the right adhesive part 3 of the shielding tape 1, the adhesive layer 1d of the left adhesive part 2 of the second shielding tape 1 becomes the same as that of the first shielding tape 1. This is because it is bonded and bonded to the right adhesive portion 3 of the shield tape 1.

Therefore, the right adhesive part 3 of the first shield tape 1
The cross section of the portion where the left adhesive part 2 of the second shield tape 1 and the left adhesive part 2 of the first shield tape 1 are overlapped is the adhesive layer 1a of the right adhesive part 3 of the first shield tape 1, the copper thin plate layer 1b, and the second shield tape 1. Layer 1b of thin copper plate, layer 1d of adhesive and layer 1 of vinyl chloride resin on the left adhesive part 2 of tape 1
It has a four-layered structure consisting of c. Then, the length of the right adhesive part 3 of the first shield tape 1 in the width direction of the shield tape 1 and the length of the second shield tape 1
The length of the left adhesive part 2 in the width direction of the shield tape 1 is the same, and the adhesive layer 1d of the left adhesive part 2 of the second shield tape 1 is made smaller than the thin copper plate layer 1b of the left adhesive part 2. Due to the slightly thin layer,
One end of the vinyl chloride resin layer 1c on the right adhesive part 3 side of the first shield tape 1 and the vinyl chloride resin layer 1c on the upper part of the left adhesive part 2 of the second shield tape 1
is what will be glued. Moreover, in this case, the thin copper plate layer 1b of the first shielding tape 1
and the thin copper plate layer 1b of the second shielding tape 1 are partially overlapped and connected to each other in contact with each other.

In the embodiment, a left adhesive part and a right adhesive part are formed at both the left and right ends of the shield tape, but these are necessary when the width of the shield area is large, and these left adhesive part and right adhesive part are not necessarily formed. There's no need.
Further, the left adhesive portion and the right adhesive portion of the shield tape may be configured with the left and right adhesive portions reversed from those in the embodiment. The thin copper plate layer that forms the middle layer of the shield tape is
If it is a metal sheet, it may be a layer of aluminum thin plate or the like.
Further, the insulating material forming the upper layer of the shield tape is not limited to a layer of vinyl chloride resin, but may be a phenol resin or the like.

The shielding tape shown in the example can be attached to the inside of a resin box for electronic or electrical equipment, etc., so that the thin metal layer forming the middle layer of the shielding tape can prevent interference waves. The insulating layer that forms the upper layer of the shielding tape can prevent short circuits and at the same time protect the thin metal plate layer.

On the other hand, the shield tape according to the present invention is constructed as shown in FIG. 4 by forming a plurality of communication holes that communicate the three layers of the shield tape, the lower layer, the middle layer, and the upper layer, in the shield tape shown in the example. Good too. By configuring the shielding tape 10 in this way, when there is a hole for heat dissipation in a box to be shielded such as an electronic device or an electric device or a predetermined electrical component protection case, the through hole of the shielding tape can be inserted into this hole. By combining 11, heat can be dissipated. In this case, the number, size, arrangement position, etc. of the through holes 10 formed in the shielding tape will depend on the holes for heat radiation of the box to be shielded, such as electronic equipment and electrical equipment.
It can be determined freely.

As is clear from the above description, the shielding tape according to the present invention exposes the surface of the metal sheet as an area where no insulating layer is provided on either the left or right edge of the metal sheet, and The opposite edge is used as an area where no adhesive layer is provided, exposing the back side of the metal sheet, and further,
The insulating layer was extended outward from the edge of the metal sheet on the left and right sides opposite to the edge where the surface of the metal sheet was exposed, and an adhesive layer was formed on the back side of the overhanging part of the insulating layer, so that the adjacent By overlapping the left and right ends of one matching shield tape on the left and right ends of the other shield tape, the metal sheets of the left and right shield tapes are overlapped and the insulating layers of both shield tapes are overlapped. The ends can be joined together. For this reason, the shielding tape according to the present invention can ensure electrical insulation while also being able to ground the entire metal sheet, thereby ensuring sufficient shielding performance against electromagnetic noise and the like.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the shielding tape wound on a reel, Fig. 2 is a perspective view showing a cross section of the shielding tape, and Fig. 3 is a perspective view showing the pasted part of the right adhesive surface and left adhesive surface of the shielding tape. a perspective view showing a cross section;
FIG. 4 is a perspective view showing the shield tape according to the second embodiment wound on a reel. 1... Shield tape, 1a, 1d... Adhesive layer, 1b... Thin copper plate layer, 1c... Vinyl chloride resin layer, 2... Left adhesive part, 3... Right adhesive part, 4
...Reel, 10...Shield tape, 11...
Through hole.

Claims (1)

[Scope of claims for utility model registration] (1) Forming an adhesive layer on the back side of the metal sheet,
In a shielding tape with an insulating layer provided on the surface side, one of the left and right edges of the metal sheet is exposed as an area where no insulating layer is provided, and the surface of the metal sheet is exposed as an area where no insulating layer is provided, and the opposite side of the metal sheet is exposed. The back side of the metal sheet is exposed as an area where no adhesive layer is provided at the edge, and an insulating layer is further extended outward from the edge of the metal sheet on the left and right opposite sides of the edge where the surface of the metal sheet is exposed. , a shielding tape characterized in that an adhesive layer is formed on the back side of the insulating layer overhang. (2) The shielding tape according to claim 1 of the utility model registration claim, wherein the adhesive layer, the metal sheet, and the insulating layer are provided with a plurality of through holes that communicate these three layers.