JP4928281B2 - Electromagnetic shielding member - Google Patents

Description

  The present invention relates to an electromagnetic wave shielding member that reduces unnecessary radiation noise of electronic equipment.

  In recent years, with the miniaturization and high functionality of electronic devices, the mounting density of printed circuit boards and the like constituting the electronic devices has increased, and accordingly, the operating frequency has been increased. As a result, electromagnetic waves that adversely affect other electronic devices such as malfunctions and transmission / reception failures, that is, unwanted radiation noise tend to increase, and it is a problem to suppress them.

Conventionally, as a technique for reducing such unnecessary radiation noise, for example, it is known to form a shield layer on the inner wall of a casing constituting an electronic device (see, for example, Patent Document 1).
In addition, as shown in FIG. 13, a method of surrounding the electronic device 50 (drive device) with a metal shield plate 51 is also employed. The metal shield plate 51 includes a lower shield plate 52 and an upper shield plate 53, and can be assembled to the electronic device 50 by using a plurality of screws (not shown, the same applies hereinafter). ing. In assembling, first, the lower shield plate 52 is assembled to the electronic device 50 using a plurality of screws, and then the electronic device 50 and the lower shield plate 52 are attached so as to cover the upper shield plate 53. Assemble with multiple screws. As a result, the main part of the electronic device 50 is surrounded by the shield plate 51, and unnecessary radiation noise radiated from the electronic device 50 is reduced.

Japanese Patent Laid-Open No. 2002-359489

However, since the technique described in Patent Document 1 has a configuration in which a shield layer is formed on the inner wall of the housing, there is a problem that the cost for forming the shield layer increases.
Further, the technology of surrounding the conventional electronic device 50 with the metal shield plate 51 has the problem that the manufacturing cost of the shield plate 51 is high and the assembly is complicated because the shield plate 51 is composed of a plurality of parts. is doing. Further, since the shield plate 51 is metallic, there is a problem that the product weight of the electronic device after assembly becomes heavy.

  The above-described problem is not limited to the case where the electronic device is a drive device, but is also commonly applied to a member that emits unnecessary radiation noise such as a printed circuit board.

  An object of the present invention is to provide an electromagnetic wave shielding member that can reduce the manufacturing cost, is excellent in assembling to an electronic device, and can prevent the weight of the electronic device from increasing.

The electromagnetic wave shielding member of the present invention that has solved the above problems is an electromagnetic wave shielding member that uses a sheet body that is flexible and has a conductivity on one side and at least a part on the other side. A pair of covering sheet portions formed by folding the sheet body with the other surface side inward is provided, and a space is formed between the pair of covering sheet portions for accommodating electronic devices that emit unnecessary radiation. Do Ri, the cover sheet portion is grounded to the electronic device via the surface fastener having a conductor portion of the conductive, characterized in that it is removably coupled attached to the electronic device.

According to the electromagnetic wave shielding member of the present invention, a space in which an electronic device is accommodated is formed between a pair of covering sheet portions formed by folding the sheet body with the other side having insulation inside. Therefore, by accommodating the electronic device in this space, unnecessary radiation radiated from the electronic device can be shielded.
The space in which the electronic device is accommodated can be formed by a simple operation of folding the sheet body with the other side having insulation inside, so that the manufacturing cost can be reduced and The advantage of being excellent in assembling is obtained.
Moreover, since the electromagnetic wave shielding member uses a flexible sheet body, it is lightweight and has good workability, compared to when a shielding member is formed using a conventional metal shielding plate, The weight can be greatly reduced. Therefore, it is possible to prevent the product weight of the electronic device assembled with the electromagnetic wave shielding member from increasing.
In addition, since one side of the sheet body is conductive, the sheet has good grounding property, and it is possible to suitably prevent external static electricity from entering the electronic device. As a result, an electromagnetic wave shielding member having excellent shielding properties against unwanted radiation and shielding properties against static electricity can be obtained.
In addition, it is possible to easily attach and remove the covering sheet portion to and from the electronic device using the planar fastener, and it is possible to obtain an electromagnetic wave shielding member that is excellent in assembling and can be easily attached and detached during maintenance. In addition, it is possible to perform grounding with one touch at the same time that the cover sheet portion is attached to the electronic device via the planar fastener, thereby eliminating the need for separate grounding work and further improving assemblability. . It also has the effect of preventing forgetting to ground during assembly.

  Furthermore, the electromagnetic wave shielding member of the present invention is formed by folding at least one of the pair of covering sheet portions from the one surface side toward the other surface side, It is preferable that the electronic device includes a conductive portion that can be grounded. According to the electromagnetic wave shielding member configured in this way, the electronic device can be grounded via the conductive portion, and there is no need to separately provide a member for grounding. In addition, the conductive portion can be formed by a simple operation of turning back a part of the covering sheet portion from one surface side to the other surface side, and an electromagnetic shielding member excellent in grounding property can be realized at low cost. .

  Moreover, the said electroconductive part can be easily formed by setting it as the structure which puts the cut | notch which can be turned in the said covering sheet part toward the said other surface side from the said one surface side. Further, since the formation of the conductive portion is simple, the assembling property is also improved.

Further, the present invention is an electromagnetic wave shielding member using a sheet body in which at least a part of each of both surfaces of a flexible and conductive sheet has an insulating property, so as to have the insulating property. Provided with a pair of covering sheet portions formed by folding the sheet body with the formed surface facing inward, and a space is formed between the pair of covering sheet portions for accommodating electronic devices that emit unwanted radiation. The covering sheet portion is grounded to the electronic device via a planar fastener having a conductive conductor portion, and is detachably connected to the electronic device .

According to this electromagnetic wave shielding member, a space in which an electronic device is accommodated is formed between a pair of covering sheet portions formed by folding a sheet body with an insulating surface facing inward. Therefore, by accommodating the electronic device in this space, unnecessary radiation radiated from the electronic device can be shielded.
Since the space in which the electronic device is accommodated can be formed by a simple operation of folding the sheet body with the insulating surface inside, the manufacturing cost can be reduced and the electronic device can be reduced. The advantage of being excellent in assemblability is obtained.
Moreover, since the electromagnetic wave shielding member uses a flexible sheet body, it is lightweight and has good workability, compared to when a shielding member is formed using a conventional metal shielding plate, The weight can be greatly reduced. Therefore, it is possible to prevent the product weight of the electronic device assembled with the electromagnetic wave shielding member from increasing.
In addition, since the sheet body is made of a conductive sheet, the sheet has good grounding properties and can suitably prevent external static electricity from entering the electronic device. As a result, an electromagnetic wave shielding member having excellent shielding properties against unwanted radiation and shielding properties against static electricity can be obtained.
Moreover, the covering sheet portion can be easily attached to and detached from the electronic device by using the planar fastener, and an electromagnetic wave shielding member that is excellent in assembling property and easy to attach and detach during maintenance or the like can be obtained. In addition, it is possible to perform grounding with one touch at the same time that the cover sheet portion is attached to the electronic device via the planar fastener, thereby eliminating the need for separate grounding work and further improving assemblability. . It also has the effect of preventing forgetting to ground during assembly.

  Further, in the electromagnetic wave shielding member of the present invention, at least one of the pair of covering sheet portions is provided with side portions formed by bending both side edges toward the space. It is preferable that the side portion has a length that partitions the space with the other covering sheet portion. According to the electromagnetic wave shielding member configured in this way, the space is surrounded by the side portions, and thus the shielding property of unnecessary radiation is enhanced. Further, the side portion can be formed by a simple operation of bending both side edges of the covering sheet portion toward the space, and an electromagnetic shielding member having a high shielding property can be realized at a lower cost than in the past. .

  Further, the pair of covering sheet portions may be configured such that both side edge portions are joined and closed. For example, when both side edges are joined and closed by heat sealing or the like, the space formed by the pair of covering sheet portions is closed in a bag shape, and an electromagnetic wave shielding member having excellent shielding properties against unwanted radiation is obtained. . Further, since the space can be closed in a bag shape by a simple joining operation such as heat sealing, an electromagnetic wave shielding member having a high shielding property can be realized at a lower cost than in the past. Furthermore, since it is in the form of a bag, it is excellent in the capacity for storing electronic devices and has good workability.

  Moreover, the electromagnetic wave shielding member of the present invention is a concave portion that accommodates a part of the component corresponding to the shape of the component at a position corresponding to the position of the component provided in the electronic device in the pair of covering sheet portions. It is good to have a configuration in which By comprising in this way, the adhesiveness to an electronic device can be improved now and the electromagnetic wave shielding member excellent in the shielding property of unnecessary radiation is obtained.

  Furthermore, it is preferable that the sheet body has a structure in which a plurality of conductive layers having conductivity and insulating layers having insulation properties are alternately stacked. With this configuration, the grounding property is further improved, and it is possible to suitably prevent the external static electricity from entering the electronic device, thereby shielding unnecessary radiation and static electricity. An electromagnetic shielding member excellent in the above can be obtained.

  In addition, by adopting a configuration in which an electrical insulating layer is provided on the mounting surface side of the planar fastener with the electronic device, for example, a short circuit between a circuit or the like provided in the electronic device and the covering sheet portion. Problems can be avoided in advance.

Further, the electromagnetic wave shielding member of the present invention, the portion having insulation properties of the sheet is preferably set to form and formed by formed by printing an insulating pattern. According to such an electromagnetic wave shielding member, for example, an insulative pattern is printed on a portion where it is desired to avoid a short circuit between a circuit or the like provided in the electronic device and the covering sheet portion, thereby suitably preventing a short circuit failure. be able to. On the other hand, the portions other than the portion where the insulating pattern is printed have conductivity, so that the grounding between the electronic device and the covering sheet portion can be reliably performed, and the electromagnetic wave having excellent shielding properties against unwanted radiation. A shield member is obtained.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to reduce manufacturing cost, the electromagnetic wave shielding member which is excellent in the assembly | attachment property to an electronic device, and can prevent that the weight of an electronic device increases is obtained.

Hereinafter, an electromagnetic wave shielding member according to an embodiment of the present invention will be described with reference to the drawings.
(First embodiment)
In the drawings to be referred to, FIG. 1 is a perspective view showing an electronic device in which an electromagnetic wave shielding member according to a first embodiment (reference example) of the present invention is assembled, and FIG. 2A shows a state in which the electromagnetic wave shielding member is developed. FIG. 2B is a cross-sectional view, and FIG. 2C is a perspective view showing a state in which a modified electromagnetic shield member is developed. In the following description, “front / rear / left / right / up / down” is based on the direction shown in FIG. In addition, although the drive apparatus is demonstrated to an example as the electronic device D, it is not the meaning which limits this.

The electromagnetic wave shielding member 1 of the present embodiment shown in FIG. 1 has flexibility, and one surface side is a conductive surface 1A (conductive layer) having conductivity, and the other surface side is an insulating surface 1B (insulating layer, 2 (see FIG. 2B). The sheet body S is made of a synthetic resin, and the sheet body S is folded in half and assembled to the electronic device D.
The sheet body S is formed from materials such as polyethylene, polypropylene, pet, polycarbonate, and acetate. A metal thin film for forming the conductive surface 1A is deposited on one surface side of the sheet body S. In this embodiment, the metal thin film is formed of aluminum. The conductive surface 1A can be formed by plating, laminating, attaching a metal foil or the like, printing, or the like.

As shown in FIG. 2A, the sheet body S includes a pair of covering sheet portions 2 and 3 and a bent portion 4. As shown in FIG. By folding back in a folded manner, a space K in which the electronic device D is accommodated is formed between the pair of covering sheet portions 2 and 3. The covering sheet portion 2 is disposed on the lower surface of the electronic device D, and the covering sheet portion 3 is disposed on the upper surface of the electronic device D. In the present embodiment, the pair of covering sheet portions 2 and 3 are formed in the same shape. However, the present invention is not limited to this, and for example, the covering sheet portion 2 disposed on the lower surface of the electronic device D is more than the covering sheet portion 3. Also, it may be formed long in the front-rear direction.
As shown in FIG. 2 (a), side portions 2a and 3a for covering the left and right side walls Da of the electronic device D (see FIG. 1, the same applies hereinafter) are provided on both side edges of the respective covering sheet portions 2 and 3. It is provided integrally.

The side portions 2a and 3a are each bent toward the space K when the cover sheet portions 2 and 3 are assembled to the electronic device D, and the bent side portions 2a and 3a are electronic. By being overlapped with each other on the side of the device D, the left and right side walls Da are respectively covered. That is, the lengths of the side portions 2a and 3a are set so as to surround the space K in a state where they overlap each other. In the present embodiment, each of the side portions 2a and 3a is formed to have a length capable of covering the side wall Da alone. It is not necessary to provide both the side portions 2a and 3a. For example, as shown in FIG. 2 (c), the side portions 2a are provided only on both side edges of one covering sheet portion 2, and the side portions 2a are provided on the other side. You may form so that the length which surrounds the space K between the coating sheet parts 3 may be provided.
Further, an insertion hole 5a for inserting a fixing screw 5 (see FIG. 1) is provided at the ends of the side portions 2a and 3a.

  As described above, the bent portion 4 is a portion where the sheet body S is folded in half, and the insertion portions 4a and 4b into which the connectors C1 and C2 (see FIG. 1) of the electronic device D can be inserted are formed. ing.

Next, the procedure for assembling the electromagnetic shielding member 1 described above to the electronic device D will be described with reference to FIG. In addition, prior to assembling, it is possible to facilitate the assembling work by making a crease along each folding line (illustrated by a broken line in FIG. 2A) that becomes a bent portion of the sheet body S. .
First, as shown in FIG. 3A, a sheet body S cut to a predetermined size so as to be adapted to the electronic device D is prepared, and this is aligned and applied to the lower surface side of the electronic device D. In this case, for example, the sheet surface S is placed on the work desk surface with the insulating surface 1B facing upward, and the electronic device D is placed on the upper surface of the sheet body S on the cover sheet portion 2 side (FIG. 3B). )reference). At this time, the positions are made to correspond so that the connectors C1 and C2 of the electronic device D are successfully inserted into the insertion parts 4a and 4b of the bent part 4, respectively.

  Thereafter, as shown in FIG. 3C, the sheet body S is folded in half while pulling up the cover sheet portion 3 side of the sheet body S, and this is placed on the upper surface side of the electronic device D (FIG. 3D). reference). At this time, the connectors C1 and C2 of the electronic device D are inserted into the insertion portions 4a and 4b of the bent portion 4. Thereby, as shown in FIG.3 (e), the electronic device D is inserted | pinched between a pair of coating sheet parts 2 and 3. FIG. That is, the electronic device D is accommodated in the space K formed between the pair of covering sheet portions 2 and 3.

  Then, the side portions 2a and 3a of the covering sheet portions 2 and 3 are bent along the left and right side walls Da of the electronic device D, respectively, and are overlapped with each other to cover a predetermined portion of the side wall Da.

Thereafter, the screws 5 are screwed into holes (not shown) provided in the left and right side walls Da through the respective insertion holes 5a, and the side portions 2a and 3a are fixed to the left and right side walls Da. At this time, by screwing the screw 5 through a washer (not shown), the contact area between the conductive surface 1A on the surface side of the side portion 3a and the screw 5 is increased, and the conductivity is improved.
As a result, the electromagnetic wave shielding member 1 is assembled to the electronic device D as shown in FIG.

According to the electromagnetic wave shielding member 1 of the present embodiment described above, the electronic device D is interposed between the pair of covering sheet portions 2 and 3 formed by folding the sheet body S with the insulating surface 1B having insulating properties inside. Since the space K in which the electronic device D is accommodated is formed, the unnecessary radiation radiated from the electronic device D can be suitably shielded by accommodating the electronic device D in the space K.
Further, since the space K in which the electronic device D is accommodated can be formed by a simple operation of folding the sheet S with the insulating surface 1B inside, the manufacturing cost can be reduced and the electronic device D can be reduced. The advantage of being excellent in assembling is obtained.
And since the electromagnetic wave shielding member 1 uses the sheet body S provided with flexibility, it is lightweight and excellent in workability, and when the shielding member is formed using a conventional metal shielding plate Compared with, the weight can be greatly reduced. Therefore, it is possible to prevent the product weight of the electronic device D assembled with the electromagnetic wave shielding member 1 from increasing.

  The pair of covering sheet portions 2 and 3 are provided with side portions 2a and 3a formed by bending both side edges toward the space K, and the space K is surrounded by the side portions 2a and 3a. As a result, the shield against unwanted radiation is improved. Further, the side portions 2a and 3a can be formed by a simple operation of bending both side edges of the covering sheet portions 2 and 3 toward the space K, and the electromagnetic shielding member 1 having a higher shielding property than the conventional one. It can be realized at low cost.

  Moreover, since the sheet | seat body S is made into the electroconductive surface 1A which has electroconductivity on the one surface side, it has favorable grounding property and can prevent suitably the static electricity from the outside infiltrating into the electronic device D. Thereby, the electromagnetic wave shielding member 1 excellent in the shielding property of unnecessary radiation and the shielding property of static electricity can be obtained.

  Moreover, as shown to Fig.4 (a), the recessed part 8a, 8b corresponding to the shape of the said components Ba and Bb corresponding to the position of the components Ba and Bb provided in the electronic device D is provided in the covering sheet part 3. It may be provided. Here, the recesses 8a and 8b may be formed with a depth sufficient to accommodate a part of the parts Ba and Bb. By comprising in this way, the adhesiveness to the electronic device D can be improved now and the electromagnetic wave shielding member 1 excellent in the shielding property of unnecessary radiation is obtained (refer FIG.4 (b)).

(Second Embodiment)
FIG. 5A is a perspective view showing a developed state of the electromagnetic shielding member according to the second embodiment (reference example) of the present invention, and FIG. 5B is a side portion of the electromagnetic shielding member on the left and right side walls of the electronic device. FIG. 5C is an enlarged cross-sectional view showing the fixing of the covering sheet portion of the electromagnetic wave shielding member on the substrate of the electronic device. In the following description, the same reference numerals are given to the same parts as those in the above-described embodiment, and the detailed description is omitted.

As shown in FIG. 5A, the present embodiment is different from the first embodiment in that conductive portions 6 are provided on the side portions 2 a and 3 a of the sheet body S constituting the electromagnetic wave shielding member 1. is there.
The conductive portion 6 is formed by making a substantially U-shaped cut in the side portions 2a and 3a and folding it back from the conductive surface 1A side to the insulating surface 1B side. The folded piece 6a is formed on the insulating surface 1B side. The conductive surface 1A is disposed so as to be exposed. And the insertion hole 6b is formed in the electroconductive part 6 by the folding piece 6a being folded back to the insulating surface 1B side. The fixing screw 5 is inserted through the insertion hole 6b.

When the side portions 2a and 3a are fixed with the screws 5 through such insertion holes 6b, the folded pieces 6a are brought into close contact with the side wall Da of the electronic device D as shown in FIG. The That is, when the folded piece 6a of the side part 3a located outside is folded back to the side part 2a, the conductive surfaces 1A of the side part 3a and the side part 2a come into contact with each other, and the folded piece 6a of the side part 2a By being folded back to the side wall Da side, the conductive surface 1A of the side portion 2a contacts the side wall Da. Thereby, both the side part 3a located outside and the side part 2a located inside are grounded to the side wall Da of the electronic device D. The electronic device D is incorporated in a device (not shown), and is suitably grounded via the device.
In addition, since the conductive surfaces 1A of the side portions 2a and 3a can be brought into contact with the screw 5, the grounding to the side wall Da can be satisfactorily performed through the screw 5. In addition, by providing the washer W, a better grounding state can be obtained.

  Further, as shown in FIG. 5C, using the same method, a conductive portion 6 ′ is provided in the covering sheet portion 2, and the covering sheet portion 2 is connected to the electronic device D via the conductive portion 6 ′. A ground terminal Pa provided on the substrate P can be grounded. Also in this case, the conductive surface 1A of the folded piece 6a of the conductive portion 6 'comes into contact with the ground terminal Pa of the substrate P, and the grounding of the covering sheet portion 2 to the substrate P is satisfactorily performed.

  According to the electromagnetic wave shielding member 1 of the present embodiment, the electronic device D can be grounded via the conductive portion 6, and there is no need to provide a separate member for grounding. In addition, the conductive portion 6 can be formed by a simple operation of turning the side portions 2a, 3a, etc. of the covering sheet portions 2, 3 from the conductive surface 1A side toward the insulating surface 1B side, and has excellent grounding properties. The electromagnetic wave shielding member 1 can be realized at a low cost.

  In addition, the conductive portion 6 can be easily formed by making a cut that can be folded back from the conductive surface 1A side toward the insulating surface 1B side, which contributes to improving the assemblability.

FIG. 6A is a perspective view showing a developed state of the electromagnetic wave shielding member according to the third embodiment (reference example) of the present invention, FIG. 6B is a perspective view of the electromagnetic wave shielding member, and FIG. d) is a perspective view showing a procedure of assembling the electromagnetic wave shielding member to the electronic device D. FIG.

As shown in FIG. 6A, the difference between the present embodiment and the first and second embodiments is that the side edges of the pair of covering sheet portions 2 and 3 of the sheet S are joined together. Thus, the space K (see FIG. 6B) is closed.
In the present embodiment, both side edges of the covering sheet portions 2 and 3 are joined by heat sealing (seal portion 7). In addition to joining by heat sealing, joining can be performed using adhesive tape, double-sided adhesive tape, conductive adhesive tape, adhesive, conductive adhesive, etc., and ultrasonic welding Etc. can also be performed.

  The sheet body S is cut into a rectangular shape according to the size of the electronic device D, and both side edges of the covering sheet portions 2 and 3 are joined together by heat sealing, as shown in FIG. It is made into a bag. As shown in FIG. 6C, the bag mouth F formed by the tip portions of the covering sheet portions 2 and 3 is formed in a size that allows the electronic device D to be inserted or pulled out. ), After the electronic device D is inserted (after assembling to the electronic device D), the gap formed is closed by the tape T or the like.

  According to the present embodiment, when both side edges are closed by heat sealing, the space K formed by the pair of covering sheet portions 2 and 3 is closed in a bag shape as described above, and shielding against unnecessary radiation. The electromagnetic wave shielding member 1 excellent in the above can be obtained. Moreover, since the space K can be closed in a bag shape by a simple operation such as heat sealing, the electromagnetic shielding member 1 having a high shielding property can be realized at a lower cost than in the past. Furthermore, since it is made into a bag shape, it is excellent in the accommodating property of the electronic device D, and the assembly workability is also good.

  In addition, joining may be performed by heat-sealing the whole both side surface part of the coating sheets 2 and 3, and may be performed by partially heat-sealing. Alternatively, it may be performed by spot-sealing with a predetermined interval.

7A and 7B are views showing a planar fastener used for assembling the electromagnetic wave shielding member according to the embodiment of the present invention, wherein FIG. 7A is a front view and FIG. 7B is a perspective view. The planar fastener is composed of a pair of a planar fastener having a loop-like portion raised in a loop shape and a planar fastener having a hook-like portion raised in a hook shape. Therefore, in the following, the planar fastener 10 provided with a loop-shaped part will be described, and the planar fastener 10 ′ provided with a hook-shaped part will be described as appropriate.

As shown in FIGS. 7A and 7B, the planar fastener 10 includes a base body 11 made of a resin material having elasticity, and a conductive conductor portion 12 provided so as to surround the outer periphery of the base body 11. And an adhesive 13 for fixing.
The base 11 has a recessed portion that can accommodate the adhesive material 13 at the center of the lower portion, and as a result, has a shape in which both side portions bulge downward across the adhesive material 13. Thereby, the conductor part 12 which covers this also bulges downward. As a result, the conductor 12 is in good contact with the electronic device D or the like on the ground side.
The conductor portion 12 has a loop-shaped portion on the entire surface side, and has conductivity including the loop-shaped portion. For example, the conductor 12 is formed by forming a metal film (not shown) on a material made of polyester fiber by an electroless plating method or the like.

  As shown in FIG. 7C, the planar fastener 10 is attached to the ground surface of the electronic device D via the adhesive material 13, and the planar fastener 10 ′ is the sheet body S. It is affixed on the opposing surface via the adhesive material 13. For example, a conductive portion 6 is provided at a portion of the sheet body S where the planar fastener 10 ′ is attached, and the folded piece 6a is disposed with the conductive surface 1A exposed on the insulating surface 1B side. The conductor portion 12 of the planar fastener 10 ′ is configured to come into contact with.

  With this configuration, the sheet body S can be suitably grounded to the electronic device D via the planar fasteners 10 and 10 '. Further, the sheet body S can be easily attached and detached via the planar fasteners 10 and 10 ', so that the assembling property is excellent and the attachment and detachment handling at the time of maintenance and the like becomes easy. Further, the attachment operation for attaching the planar fastener 10 to the planar fastener 10 'enables grounding to be performed at the same time with one touch, thereby eliminating the trouble of separately performing the grounding work and further improving the assembling property. It also has the effect of preventing forgetting to ground during assembly.

  In addition, as shown to Fig.8 (a), you may comprise the planar fastener 10A using only the conductor part 12. FIG. In this planar fastener 10A, a screw hole 12a is formed, and as shown in FIG. 8B, it can be fixed to the electronic device D using a screw 5. That is, the planar fastener 10A can be attached using the screw hole Dc provided in the electronic device D.

  Further, the planar fastener 10B shown in FIG. 9A has a structure in which an insulating portion 14 as an electric insulating layer is provided on the conductor portion 12, and an adhesive (not shown) or the like is interposed through the insulating portion 14. Can be attached to the electronic device D. Such a planar fastener 10B is suitable for attaching a sheet body S (see FIG. 8 and the like) while preventing a short circuit with respect to an electronic component, a substrate, and the like, and avoids problems such as a short circuit in advance. It can be done and is easy to assemble.

  Further, as in a planar fastener 10C shown in FIG. 9B, the insulating portion 14 may be formed so as to protrude beyond the outer peripheral portion of the conductor portion 12 to increase the insulating property. Good.

FIG. 10 shows an attachment example using the planar fastener 10 ′ and the planar fastener 10B, and the sheet body S is attached to cover the periphery of the connector C1 provided on the substrate P.
The planar fastener 10 ′ is attached to the sheet body S in the same manner as that shown in FIG. 7C, and the conductor portion 12 of the planar fastener 10 ′ is interposed with the folded piece 6a of the conductive portion 6. Then, the conductive surface 1A of the sheet S is brought into contact.
Further, the planar fastener 10B is attached so as to cover the periphery of the connector C1 with an adhesive material or the like (not shown) provided in the insulating portion 14. The conductor portion 12 is grounded to the ground terminal Pa of the substrate P by the screw 5 and the washer W inserted through the screw hole 12a.

In the mounting using the planar fastener 10 ′ and the planar fastener 10B, the outer shape of the connector C1 is taken advantage of the advantage that each of the planar fasteners 10 ′ and 10B has flexibility. Thus, these can be arranged, the adhesion of the sheet body S to the substrate P can be enhanced, and the shielding property of unnecessary radiation can be enhanced.
In addition, you may join the side parts 2a and 3a (refer FIG. 1) of the coating sheet parts 2 and 3 using the above planar fasteners 10, 10 ', and 10A-10C suitably, Instead of the heat seal described above, both side edges of the cover sheet portions 2 and 3 (see the seal portion 7 and FIG. 6A) may be joined.

As mentioned above, although embodiment which concerns on this invention was described, it cannot be overemphasized that this invention is not limited to these, The appropriate change implementation according to the main point of invention is possible.
For example, as shown in FIGS. 11A to 11C, the electromagnetic wave shielding member 1 ′ is formed in a size that can accommodate the entire substrate P, and as shown in FIG. You may comprise so that these whole may be accommodated in the accommodating bodies 20, such as a housing | casing, in the state which accommodated the board | substrate P in electromagnetic wave shield member 1 '. In this example, the sheet body S is provided with recesses 8c, 8d, 8e corresponding to the components Bc, Bd, Be provided on the substrate P, and the pair of covering sheet portions 2, 3 are heat sealed. And the whole is formed into a bag shape, and a space K having a high shielding property is formed. The electromagnetic wave shielding member 1 ′ is preferably grounded to the container 20 via the folded piece 6 a and the screw 5.

Also, as shown in FIGS. 12A and 12B, a sheet body S is formed in which a plurality of conductive layers forming the conductive surface 1A and insulating layers forming the insulating surface 1B are alternately stacked. You may employ | adopt as the sheet | seat body S in each said embodiment.
By using the sheet body S laminated in this way, the grounding property is further improved, and it is possible to suitably prevent external static electricity from entering the electronic device D, and unnecessary radiation. An electromagnetic wave shielding member having excellent shielding properties and electrostatic shielding properties can be obtained.

Further, as shown in FIG. 12C, an insulating layer (insulating surface 1B) having insulating properties is formed on both surfaces of the sheet S1 provided with a conductive layer (conductive surface 1A) having flexibility and conductivity. The sheet body S ′ may be configured and an electromagnetic wave shielding member may be configured using the sheet body S ′. The insulating layer (insulating surface 1B) may be provided on at least a part of each of both surfaces of the sheet S1.
A pair of covering sheet portions 2 as shown in FIG. 1 formed by folding back the sheet body S ′ with any one of the insulating surfaces 1B inside also by the electromagnetic wave shielding member using such a sheet body S ′. , 3 in the space K, it is possible to shield unwanted radiation radiated from the electronic device D.
Moreover, as shown in FIG.12 (c), since sheet | seat body S 'is both surfaces covered with an insulating layer (insulating surface 1B), the electromagnetic wave shielding member excellent in insulation is obtained. In addition, since both surfaces are insulating layers (insulating surface 1B), when assembling to the electronic device D, it is not necessary to pay attention to the front and back of the sheet body S ′, and the assembling is easy to perform.

  Moreover, although not shown in figure, you may form the insulating surface 1B which has the insulation of the sheet | seat body S by printing an insulating pattern. For example, a short circuit failure can be suitably prevented by printing an insulating pattern on a portion where it is desired to avoid a short circuit between the circuit or the like provided in the electronic device D and the covering sheet portion 2. On the other hand, since the portions other than the portion where the insulating pattern is printed have conductivity, the grounding can be surely performed, and the electromagnetic wave shielding member 1 having excellent shielding properties against unnecessary radiation can be obtained.

It is a perspective view which shows the electronic device with which the electromagnetic wave shielding member which concerns on 1st Embodiment of this invention was assembled | attached. (A) is a perspective view which shows the state which expand | deployed the electromagnetic shielding member, (b) is sectional drawing, (c) is a perspective view which shows the state which expand | deployed the electromagnetic shielding member of a modification. (A)-(f) is explanatory drawing which shows the procedure of assembling | attaching an electromagnetic wave shielding member to an electronic device. (A) (b) is explanatory drawing which shows a modification. It is an exploded perspective view of an electromagnetic wave shielding member similarly. (A) is a perspective view which shows the state which expand | deployed the electromagnetic wave shielding member which concerns on 2nd Embodiment of this invention, (b) is an expanded sectional view which shows fixation of the side part of the electromagnetic wave shielding member in the right and left side walls of an electronic device, (C) is an expanded sectional view which shows fixation of the coating sheet part of the electromagnetic wave shielding member in the board | substrate part of an electronic device. (A) is a perspective view which shows the state which expand | deployed the electromagnetic wave shield member based on 3rd Embodiment of this invention, (b) is a perspective view of an electromagnetic wave shield member, (c) (d) is an electromagnetic wave shield member to an electronic device. It is a perspective view which shows the procedure to assemble | attach. It is the figure which showed the planar fastener used for the assembly | attachment of an electromagnetic wave shield member, (a) is a front view, (b) is a perspective view, (c) is sectional drawing which shows the attachment using a planar fastener. (A) is a perspective view which shows the other example of a planar fastener, (b) is sectional drawing which shows the attachment using a planar fastener. (A) (b) is a perspective view which shows the other example of a planar fastener. It is a perspective view which shows the attachment using a planar fastener. (A)-(c) is explanatory drawing which shows another electromagnetic wave shielding member. (A) (b) (c) is sectional drawing which shows the other example of a sheet | seat body. It is explanatory drawing of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electromagnetic wave shielding member 1 'Electromagnetic wave shielding member 1A Conductive surface 1B Insulating surface 2,3 Cover sheet part 2a, 3a Side part 4 Bending part 5a Insertion hole 6 Conductive part 6' Conductive part 6a Folding piece 6b Insertion hole 7 Seal part 8a -8e Recess 10 Planar fastener 10 'Planar fastener 10A Planar fastener 10B Planar fastener 10C Planar fastener 12 Conductor part 14 Insulation part Ba-Be Parts D Electronic device Da Side wall K Space P Substrate Pa Grounding terminal S Sheet body W Washer

Claims (10)

An electromagnetic wave shielding member using a sheet body that is flexible and has a conductivity on one side and at least a part on the other side is insulative,
A pair of covering sheet portions formed by folding the sheet body with the other surface side inside,
Ri Na and space electronics that radiation is contained unnecessary radiation is formed between the pair of the cover sheet portion,
The electromagnetic wave shielding member, wherein the covering sheet portion is grounded to the electronic device via a planar fastener having a conductive conductor portion and is detachably connected to the electronic device.   At least one covering sheet portion of the pair of covering sheet portions is formed by folding a portion of the one surface side from the one surface side toward the other surface side, and can be grounded to the electronic device. The electromagnetic wave shielding member according to claim 1, wherein the conductive portion is provided.   The electromagnetic shielding member according to claim 2, wherein the conductive portion is formed by making a cut into the covering sheet portion that can be folded back from the one surface side toward the other surface side. An electromagnetic wave shielding member using a sheet body in which at least a part of each of both surfaces of a sheet having flexibility and conductivity has an insulating property,
A pair of covering sheet portions formed by folding the sheet body with the insulating surface facing inward,
Ri Na and space electronics that radiation is contained unnecessary radiation is formed between the pair of the cover sheet portion,
The electromagnetic wave shielding member, wherein the covering sheet portion is grounded to the electronic device via a planar fastener having a conductive conductor portion and is detachably connected to the electronic device.   At least one covering sheet portion of the pair of covering sheet portions is provided with a side portion formed by bending both side edges toward the space, and this side portion is the other covering portion. The electromagnetic wave shielding member according to any one of claims 1 to 4, wherein the electromagnetic shielding member has a length that surrounds the space with a sheet portion.   The electromagnetic shielding member according to claim 5, wherein the pair of covering sheet portions are closed by joining both side edges.   The pair of covering sheet portions is provided with a recess for accommodating a part of the component corresponding to the shape of the component at a position corresponding to the position of the component provided in the electronic device. The electromagnetic wave shielding member according to any one of claims 1 to 6. The electromagnetic wave shielding member according to any one of claims 1 to 7 , wherein the sheet body is formed by alternately laminating a plurality of conductive layers having conductivity and insulating layers having insulation properties. . On the planar fastener, electromagnetic wave shielding member as claimed in any one of claims 8, characterized in that electrically insulating layer is provided on the mounting surface side of the electronic device. Moiety having insulation properties of the sheet body, the electromagnetic wave shielding member as claimed in any one of claims 9, characterized by being formed by printing an insulating pattern.

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