Electromagnetic wave shielding case, lid body, case main body, and assembly method of electromagnetic wave shielding case

Abstract

To provide an electromagnetic wave shielding case, a lid body, a case main body, and an assembly method of the electromagnetic wave shielding case, which are capable of suppressing leakage of electromagnetic waves.SOLUTION: An electromagnetic wave shielding case includes: a case main body having an accommodation space and an opening, in which a surface of at least a portion facing the accommodation space is covered with a conductive layer made of a conductive material; a lid body provided so as to close the opening, in which the surface of at least the portion facing the accommodation space is covered with the conductive layer made of the conductive material; a connection part connecting the case main body and the lid body; and a plurality of protruding pieces that are integrally formed with one of the case main body and the lid body, protrude toward the other, are covered with the conductive layer made of the conductive material, and are in contact with the other conductive layer of the case main body and the lid body. The protruding pieces are arranged at intervals along a peripheral edge of the opening, and the interval between the adjacent protruding pieces in a peripheral edge direction is smaller than a wavelength of an electromagnetic wave to be blocked from an article.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an electromagnetic wave shielding case, a lid, a case body, and a method for assembling an electromagnetic wave shielding case. [Background technology]

[0002] It is known to use metal for cases that house items in order to suppress electromagnetic interference with the outside.

[0003] For example, Patent Document 1 describes a configuration that includes a case body with a metallized layer on at least the inner surface to suppress electromagnetic induction interference, a lid body with a metallized layer on at least the inner surface, and a locking claw that connects the case body and the lid body so that the metallized layers around the case body and the lid body come into contact. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 8-248277 Summary of the Invention [Problem to be solved by the invention]

[0005] In the configuration described in Patent Document 1, if a gap occurs between the case body and the lid, electromagnetic waves may leak through this gap.

[0006] An object of the present disclosure is to provide an electromagnetic wave shielding case, a lid, a case body, and an assembly method for an electromagnetic wave shielding case that solves the above-mentioned problems. [Means for solving the problem]

[0007] An electromagnetic wave shielding case according to one aspect of the present disclosure comprises a case body having a storage space capable of accommodating an item and an opening communicating with the storage space, the case body having a surface facing at least the storage space covered with a conductive layer made of a conductive material; a lid body arranged to close the opening and having a surface facing at least the storage space covered with a conductive layer made of a conductive material; a connection portion connecting the case body and the lid body; and a protruding piece formed integrally with either the case body or the lid body, protruding toward the other of the case body and the lid body in the opposing direction in which the case body and the lid body face each other, the surface of which is covered with a conductive layer made of a conductive material and contacting the conductive layer of the other of the case body and the lid body, wherein a plurality of the protruding pieces are arranged at intervals along the periphery of the opening, the interval between adjacent protruding pieces being smaller than the wavelength of the electromagnetic waves to be shielded from the item.

[0008] A lid according to one aspect of the present disclosure is a lid that is provided to close an opening of a case body that has a storage space capable of storing an item and an opening that communicates with the storage space, and is provided with a protruding piece that protrudes toward the case body in the opposing direction in which the case body and the lid body face each other, has a surface covered with a conductive layer made of a conductive material, and contacts the conductive layer of the case body, and the protruding piece is arranged in a row at intervals along the periphery of the opening, and the distance between adjacent protruding pieces is smaller than the wavelength of the electromagnetic waves that are to be blocked from the item.

[0009] A case body according to one aspect of the present disclosure has a storage space capable of storing an item, and an opening communicating with the storage space, and at least the surface of the portion facing the storage space is covered with a conductive layer made of a conductive material. The case body has a lid body that is arranged to close the opening, and at least the surface of the portion facing the storage space is covered with a conductive layer made of a conductive material, and in an opposing direction in which the case body and a lid body face each other, the lid body has a protruding piece that protrudes toward the lid body, has a surface covered with a conductive layer made of a conductive material, and contacts the conductive layer of the lid body, and the protruding piece is arranged in a row at intervals along the periphery of the opening, and the interval between adjacent protruding pieces is smaller than the wavelength of the electromagnetic waves that are to be blocked from the item.

[0010] A method for assembling an electromagnetic wave shielding case according to one aspect of the present disclosure includes the steps of: arranging a lid body, the lid body having a surface facing at least the storage space and a storage space capable of accommodating an item and an opening communicating with the storage space, the surface of at least a portion of which faces the storage space being covered with a conductive layer made of a conductive material, on the lid body so as to close the opening; and connecting the case body and the lid body. In the step of arranging the lid body so as to close the opening, a plurality of lid bodies are arranged integrally with either the case body or the lid body along the periphery of the opening at intervals smaller than the wavelength of the electromagnetic waves to be shielded from the item, the lid body protruding toward the other of the case body and the lid body in the opposing direction in which the case body and the lid body face each other, and the lid body has a surface covered with a conductive layer made of a conductive material, and the lid body is brought into contact with the conductive layer of the other of the case body and the lid body. [Effects of the Invention]

[0011] According to the above aspect, leakage of electromagnetic waves can be suppressed. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective development view showing the configuration of an electromagnetic wave shielding case according to the present disclosure. [Figure 2] FIG. 4 is a cross-sectional view of the configuration of the electromagnetic wave shielding case according to the present disclosure, viewed from a second direction. [Figure 3] FIG. 4 is a cross-sectional view of the electromagnetic shielding case according to the present disclosure as viewed from a second direction. [Figure 4] 1 is an enlarged cross-sectional view showing a portion of a case body and a lid of an electromagnetic wave shielding case according to the present disclosure. [Figure 5] 1 is an enlarged cross-sectional view showing a portion of a lid of an electromagnetic wave shielding case according to the present disclosure. [Figure 6] 1 is an enlarged cross-sectional view showing a state in which a case body and a lid of an electromagnetic wave shielding case according to the present disclosure are connected together. FIG. [Figure 7] 10 is a diagram showing a state in which a gap is formed between the case body and the lid of the electromagnetic shielding case according to the present disclosure. FIG. [Figure 8] 1 is a flowchart showing the flow of a method for assembling an electromagnetic wave seal and a case according to the present disclosure. [Figure 9] FIG. 2 is a cross-sectional view of an electromagnetic wave shielding case according to the present disclosure. [Figure 10] FIG. 2 is a cross-sectional view of an electromagnetic wave shielding case according to the present disclosure. [Figure 11] FIG. 2 is a cross-sectional view of a lid according to the present disclosure. [Figure 12] FIG. 2 is a cross-sectional view of a case body according to the present disclosure. [Figure 13] 1 is a flowchart showing the flow of a method for assembling an electromagnetic wave seal and a case according to the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0013] Each embodiment will be described below with reference to the drawings. In all drawings, the same or corresponding components are designated by the same reference numerals, and common descriptions will be omitted. It should be noted that in this disclosure, the drawings may relate to one or more embodiments.

[0014] First Embodiment Hereinafter, an embodiment according to the present disclosure will be described with reference to the drawings. As shown in FIGS. 1 to 3, the electromagnetic wave shielding case 1A includes a case body 2A, a lid body 3A, a connection portion 4, and a protruding piece 5A. The electromagnetic wave shielding case 1A is hollow box-shaped and can store items inside. The electromagnetic wave shielding case 1A is, for example, a rectangular parallelepiped shape. When viewed from the direction in which the case body 2A and the lid body 3A face each other, the electromagnetic wave shielding case 1A may be, for example, a polygonal, circular, elliptical, or the like shape when viewed from the direction in which the case body 2A and the lid body 3A face each other. For example, the electromagnetic wave shielding case 1A may be capable of housing an electronic device such as a circuit board on which electronic components are mounted as an article. In the following description, the direction in which the case body 2A and the lid body 3A face each other is referred to as the facing direction Dv. The direction perpendicular to the facing direction Dv is referred to as the first direction D1. The direction perpendicular to the facing direction Dv and the first direction D1 is referred to as the second direction D2.

[0015] The case body 2A integrally includes a base plate 21 and a peripheral wall 22. The base plate 21 and the peripheral wall 22 have their long sides aligned in a first direction D1 and their short sides aligned in a second direction D2.

[0016] The substrate portion 21 has a plate shape that extends along a plane that intersects with the facing direction Dv. The substrate portion 21 has a rectangular shape when viewed from the facing direction Dv.

[0017] The peripheral wall portion 22 rises from the outer periphery of the base portion 21 to one side in the facing direction Dv. The peripheral wall portion 22 has a rectangular shape when viewed in the facing direction Dv. The peripheral wall portion 22 has a pair of first wall portions 22a and a pair of second wall portions 22b. The pair of first wall portions 22a are spaced apart in the second direction D2. Each of the pair of first wall portions 22a extends in the first direction D1. The pair of second wall portions 22b are spaced apart in the first direction D1. Each of the pair of second wall portions 22b extends in the second direction D2 and connects ends of the pair of first wall portions 22a.

[0018] Such a case body 2A has a storage space S capable of storing items in a portion surrounded by the base plate 21 and the peripheral wall 22. The case body 2A has an opening 2a inside the tip of the peripheral wall 22 that communicates with the storage space S. The case body 2A is made of, for example, a synthetic resin, and at least the surface of the case body 2A that faces the storage space S is covered with a conductive layer 2m made of a conductive material, such as by plating with a metal material. In this embodiment, for example, the base plate 21 and the peripheral wall 22 are entirely covered with the conductive layer 2m.

[0019] The case main body 2A has screw-connected portions 26 at the four corners of the peripheral wall portion 22 when viewed from the facing direction Dv. The screw-connected portions 26 are formed inside the corners of the peripheral wall portion 22 where the first wall portion 22a and the second wall portion 22b intersect. When viewed from the facing direction Dv, the screw-connected portions 26 have, for example, a rectangular shape, and extend from the base portion 21 to one side in the facing direction Dv integrally with the peripheral wall portion 22. Screw holes 26h are formed in the screw-connected portions 26, into which screws 41, described below, are fastened.

[0020] 2 to 4, a tip surface 23, a guide surface 24, and an inclined surface 25 are formed at the tip end of the peripheral wall portion 22 on one side in the facing direction Dv. The tip surface 23 faces one side in the facing direction Dv.

[0021] As shown in FIG. 4, the guide surface 24 and the inclined surface 25 of this embodiment are formed on a part of the inner circumferential surface 22f of the peripheral wall portion 22 that faces the storage space S. The guide surface 24 and the inclined surface 25 are formed in this order on the other side of the tip surface 23 in the facing direction Dv. The guide surface 24 and the inclined surface 25 are formed on each of the first wall portion 22a and the second wall portion 22b. The guide surface 24 extends inwardly of the storage space S toward the other side of the facing direction Dv. The inclined surface 25 extends inwardly of the storage space S in the other side of the facing direction Dv, i.e., as it moves away from the cover 3A in the facing direction Dv. The inclination angle θ1 of the guide surface 24 with respect to the facing direction Dv is greater than the inclination angle θ2 of the inclined surface 25 with respect to the facing direction Dv.

[0022] As shown in FIGS. 1 to 3, the protruding piece 5A is provided on either the case body 2A or the lid body 3A. The protruding piece 5A of the present disclosure is provided on the lid body 3A. The lid body 3A is disposed on one side of the case body 2A in the opposing direction Dv. The lid body 3A integrally includes a lid body main body 31 and a protruding piece 5A. The lid body main body 31 and the protruding piece 5A of the lid body 3A are made of, for example, a synthetic resin, and at least the surface of the lid body 3A that faces the storage space S is covered with a conductive layer 3m made of a conductive material. In this embodiment, for example, the entire surfaces of the lid body main body 31 and the protruding piece 5A are covered with the conductive layer 3m.

[0023] The lid body main body 31 is plate-shaped and extends along a plane intersecting the facing direction Dv. The lid body main body 31 has a rectangular shape when viewed from the facing direction Dv. The lid body main body 31 has a pair of first outer edge portions 31a and a pair of second outer edge portions 31b. The pair of first outer edge portions 31a extend in a first direction D1, which is the long side direction of the lid body main body 31, at both ends of the lid body main body 31 in the second direction D2. The pair of second outer edge portions 31b extend in a second direction D2, which is the short side direction of the lid body main body 31, at both ends of the lid body main body 31 in the first direction D1. The lid body main body 31 is configured to close the opening 2a from one side in the facing direction Dv. The lid body main body 31 has insertion holes 31h at its four corners when viewed from the facing direction Dv. Each insertion hole 31h is formed to communicate with the screw hole 26h when the cover body 31 is disposed so as to close the opening 2a of the case body 2A.

[0024] The cover 3A has a first group of protruding pieces 51 provided along each of the pair of first outer edge portions 31a and a second group of protruding pieces 52 provided along each of the pair of second outer edge portions 31b. The first group of protruding pieces 51 is made up of a plurality of protruding pieces 5A provided along each of the pair of first outer edge portions 31a. The second group of protruding pieces 52 is made up of a plurality of protruding pieces 5A provided along each of the pair of second outer edge portions 31b.

[0025] Each protruding piece 5A is provided on the other side of the opposing direction Dv, i.e., on the case main body 2A side, of the lid main body 31. The protruding pieces 5A protrude from the lid main body 31 toward the case main body 2A on the other side of the opposing direction Dv.

[0026] 3 and 5, in each of the first protruding piece group 51 and the second protruding piece group 52, the multiple protruding pieces 5A are arranged at predetermined intervals along the inner periphery of the opening 2a when the lid body 31 of the lid body 3A is positioned so as to close the opening 2a. The multiple protruding pieces 5A constituting the first protruding piece group 51 are arranged on each of the pair of first wall portions 22a so as to be positioned between the screw-connected portions 26 at both ends in the first direction D1. The multiple protruding pieces 5A constituting the second protruding piece group 52 are arranged on each of the pair of second wall portions 22b so as to be positioned between the screw-connected portions 26 at both ends in the second direction D2.

[0027] As shown in Fig. 4, the tip of the protruding piece 5A is tapered so that the thickness t in a direction intersecting the surface of the conductive layer 2m of the case body 2A that contacts the protruding piece 5A gradually decreases as the tip moves away from the lid 3A toward the other side of the opposing direction Dv. As shown in Fig. 6, the protruding piece 5A is provided so as to be elastically deformable in a direction intersecting the surface of the conductive layer 2m of the case body 2A that contacts the protruding piece 5A. Here, the direction intersecting the surface of the conductive layer 2m of the case body 2A that contacts the protruding piece 5A is the second direction D2 for the protruding pieces 5A of the first protruding piece group 51, and is the first direction D1 for the protruding pieces 5A of the second protruding piece group 52.

[0028] 5, in this embodiment, each protruding piece 5A is formed in a rectangular shape when viewed from a direction intersecting the surface of the conductive layer 2m at the portion in contact with the protruding piece 5A of the case body 2A. Note that each protruding piece 5A is not limited to a rectangular shape when viewed from a direction intersecting the surface of the conductive layer 2m at the portion in contact with the protruding piece 5A of the case body 2A, and may have other shapes such as a trapezoid, a triangle, or a semicircle.

[0029] As shown in Figures 3 and 5, in each of the first protrusion group 51 and the second protrusion group 52, the multiple protrusions 5A are arranged so that the distance G1 between adjacent protrusions 5A is smaller than the wavelength of the electromagnetic waves to be blocked from the object. Furthermore, in each of the first protruding piece group 51 and the second protruding piece group 52, of the multiple protruding pieces 5A, the protruding piece 5Ac adjacent to the screw-connected portion 26 is arranged so that the gap G2 between it and the screw-connected portion 26 is smaller than the wavelength of the electromagnetic waves that are to be blocked from the item. Here, "the wavelength of electromagnetic waves that should be shielded from the article" refers to the wavelength of electromagnetic waves that are required to be shielded from the article housed in the electromagnetic wave shielding case 1A. For example, the "wavelength of electromagnetic waves to be blocked from the article" may be the wavelength of electromagnetic waves related to the suppression of electromagnetic interference (EMI) required for the article housed in the electromagnetic wave shielding case 1A. For example, the "wavelength of electromagnetic waves to be blocked from an item" may be the wavelength of electromagnetic waves related to the EMC (Electro Magnetic Compatibility) characteristics, including the EMS (Electro Magnetic Susceptibility) characteristics, required of an item housed in the electromagnetic wave shielding case 1A. For example, the "wavelength of electromagnetic waves to be blocked from an article" may be the wavelength of electromagnetic noise emitted to the outside of the electromagnetic shielding case 1A by a device such as a circuit board housed in the electromagnetic shielding case 1A. For example, the "wavelength of electromagnetic waves to be blocked from an article" may be the wavelength of electromagnetic noise that a device such as a circuit board housed in the electromagnetic wave shielding case 1A may receive from outside the electromagnetic wave shielding case 1A.

[0030] As shown in FIGS. 1 and 3, the connection portion 4 connects the case body 2A and the lid body 3A. In this embodiment, the connection portion 4 is a plurality of screws 41. Each screw 41 passes through an insertion hole 31h formed in the lid body 3A and is fastened to a screw hole 26h formed in the case body 2A. Note that the connection portion 4 is not limited to the screws 41, and may be a rivet, an adhesive, or the like, as long as it can connect the case body 2A and the lid body 3A.

[0031] 3 and 6, when the case body 2A and the lid body 3A are connected and the lid body main body 31 of the lid body 3A is positioned so as to close the opening 2a, the conductive layer 2m on the tip surface 23 of the case body 2A and the conductive layer 3m on the surface of the outer periphery of the lid body main body 31 facing the other side in the opposing direction Dv come into contact and are electrically connected. In each of the first protruding piece group 51 and the second protruding piece group 52, each protruding piece 5A comes into contact with the conductive layer 2m on the inclined surface 25, which is part of the inner periphery of the peripheral wall portion 22. The protruding pieces 5A are provided in a disengaged state, only contacting the surface of the conductive layer 2m of the case body 2A and not engaging with the case body 2A.

[0032] 7, if a gap occurs between case body 2A and lid body 3A for some reason in this state, multiple protrusions 5A of first protrusion group 51 and second protrusion group 52 will be exposed in the gap between case body 2A and lid body 3A. In each of first protrusion group 51 and second protrusion group 52, the distance G1 between adjacent protrusions 5A is smaller than the wavelength of the electromagnetic waves that are to be blocked from the article, so that the electromagnetic waves that are to be blocked from the article are prevented from passing through the gap between case body 2A and lid body 3A.

[0033] (Assembling method for electromagnetic wave shielding case) As shown in FIG. 8, the method of assembling the electromagnetic wave shielding case 1A includes step S11 of arranging the lid 3A so as to close the opening 2a, and step S12 of connecting the case body 2A and the lid 3A.

[0034] In step S11 of placing the lid body 3A to close the opening 2a, the lid body 3A is placed on the case body 2A, which has previously housed a substrate or the like in the storage space S, so as to close the opening 2a. At this time, the guide surfaces 24 of the case body 2A allow the multiple protruding pieces 5A to be easily inserted inside the peripheral wall portion 22. Furthermore, by abutting the lid body main body 31 of the lid body 3A against the tip surface 23 of the peripheral wall portion 22 of the case body 2A, the conductive layer 3m of the lid body 3A and the conductive layer 2m on the tip surface 23 are electrically connected. Furthermore, with the lid body 3A abutting against the tip surface 23, each of the multiple protruding pieces 5A comes into contact with the inclined surface 25. At this time, each of the multiple protruding pieces 5A is pressed by the inclined surface 25 and elastically deforms toward the inside of the storage space S. As a result, each protruding piece 5A generates a reaction force (repulsion force) that tries to restore the original shape, ensuring contact between each protruding piece 5A and inclined surface 25. In this way, the conductive layer 3m covering each protruding piece 5A and the conductive layer 2m on inclined surface 25 are electrically connected.

[0035] In step S12 of connecting the case body 2A and the lid body 3A, screws 41 are fastened through multiple insertion holes 31h formed in the lid body 3A into screw holes 26h formed in the case body 2A, thereby connecting the case body 2A and the lid body 3A and completing the assembly of the electromagnetic wave shielding case 1A.

[0036] In the electromagnetic wave shielding case 1A, lid 3A, and assembly method for the electromagnetic wave shielding case 1A of this embodiment, the multiple protruding pieces 5A formed on the lid 3A contact the conductive layer 2m of the case body 2A. The spacing G1 between the multiple protruding pieces 5A arranged side by side is smaller than the wavelength of the electromagnetic waves to be shielded from the item. Therefore, even if a gap occurs between the case body 2A and the lid 3A, the multiple protruding pieces 5A covered with the conductive layer 3m will be exposed in the gap between the case body 2A and the lid 3A. Therefore, even if a gap occurs between the case body 2A and the lid 3A, leakage of electromagnetic waves through this gap can be prevented. As a result, for example, an electromagnetic interference suppression effect can be obtained.

[0037] (Variation 1) In the above embodiment, the entire surfaces of the substrate portion 21 and the peripheral wall portion 22 are covered with the conductive layer 2m, but any configuration is possible as long as at least the surface of the portion of the case body 2A that faces the storage space S is covered with the conductive layer 2m. As a modified example, only the surface of the portion of the case body 2A that faces the storage space S may be covered with the conductive layer 2m.

[0038] (Variation 2) In the above embodiment, the entire surfaces of the lid body main body 31 and the protruding piece 5A are covered with the conductive layer 3m, but any configuration is possible as long as at least the portion of the surface of the lid body 3A that faces the storage space S is covered with the conductive layer 3m. As a modified example, only the portion of the surface of the lid body 3A that faces the storage space S may be covered with the conductive layer 3m.

[0039] (Variation 3) In the above embodiment, the protruding piece 5B is provided on the cover 3A, but the present invention is not limited to this. 9, an electromagnetic wave shielding case 1B of the present disclosure includes a case main body 2B, a lid 3B, a connection portion 4, and a protruding piece 5B. In the electromagnetic wave shielding case 1B of the present disclosure, the protruding piece 5B is provided on the case main body 2B.

[0040] The case body 2B integrally includes a base plate 21, a peripheral wall 22, and a protruding piece 5B. The base plate 21 is plate-shaped and extends along a plane intersecting the opposing direction Dv. The base plate 21, peripheral wall 22, and protruding piece 5B of the case body 2B are made of, for example, synthetic resin, and at least the surface of the case body 2B facing the storage space S is covered with a conductive layer 2m made of a conductive material, such as by plating with a metal material. In this modification, for example, the entire surfaces of the base plate 21, peripheral wall 22, and protruding piece 5B are covered with the conductive layer 2m. The case body 2B has a storage space S capable of storing items, surrounded by the base plate 21 and peripheral wall 22. The case body 2B has an opening 2a inside the tip of the peripheral wall 22 that communicates with the storage space S.

[0041] The case body 2B has a pair of first protruding piece groups 53 and a pair of second protruding piece groups 54. The first protruding piece groups 53 are made up of a plurality of protruding pieces 5B provided along each of the pair of first wall portions 22a extending in the first direction D1. The second protruding piece groups 54 are made up of a plurality of protruding pieces 5B provided along each of the pair of second wall portions 22b extending in the second direction D2.

[0042] Each protruding piece 5B is joined to the inner circumferential surface of the peripheral wall portion 22. The protruding piece 5B protrudes from the peripheral wall portion 22 toward the cover body 3B on one side in the opposing direction Dv.

[0043] In each of the first protrusion group 53 and the second protrusion group 54, the multiple protrusions 5B are arranged at a predetermined interval along the inside of the periphery of the opening 2a when the lid body 3B is positioned so as to close the opening 2a.

[0044] In each of the first protruding piece group 53 and the second protruding piece group 54, the plurality of protruding pieces 5B are arranged so that the interval G1 between adjacent protruding pieces 5B is smaller than the wavelength of the electromagnetic waves that are to be blocked from the article.

[0045] The lid body 3B is disposed on one side of the case body 2B in the opposing direction Dv. The lid body 3B integrally includes a lid body side substrate portion 32 and a lid body side peripheral wall portion 33. The lid body side substrate portion 32 and the lid body side peripheral wall portion 33 of the lid body 3B are made of, for example, synthetic resin, and at least the surface of the lid body 3B that faces the storage space S is covered with a conductive layer 3m made of a conductive material. In this modification, for example, the entire surfaces of the lid body side substrate portion 32 and the lid body side peripheral wall portion 33 are covered with the conductive layer 3m.

[0046] The lid body side substrate portion 32 is in the shape of a plate extending along a plane intersecting the facing direction Dv. The lid body side substrate portion 32 has a rectangular shape when viewed in the facing direction Dv. The lid body side peripheral wall portion 33 rises from the outer periphery of the lid body side substrate portion 32 toward the other side of the facing direction Dv, i.e., the case main body 2B side. The guide surface 24 and the inclined surface 25 are formed on the lid body side peripheral wall portion 33.

[0047] The lid 3B is provided to close the opening 2a from one side in the opposing direction Dv. The connection portion 4 connects the case body 2B and the lid 3B. The connection portion 4 of the present disclosure is a plurality of screws 41. Each screw 41 passes through an insertion hole 32h formed in the lid 3B and is fastened to a screw hole 26h formed in the case body 2B.

[0048] When the lid 3B is positioned to close the opening 2a, each protruding piece 5B comes into contact with the conductive layer 3m at an inclined surface 25 that is part of the inner peripheral surface of the lid-side peripheral wall 33. The protruding pieces 5B are provided in a disengaged state, only in contact with the surface of the conductive layer 3m of the lid 3B and not engaged with the lid 3B.

[0049] In the electromagnetic wave shielding case 1B and case body 2B of a modified example of this embodiment, multiple protruding pieces 5B formed on the case body 2B contact the conductive layer 3m of the lid body 3B. The spacing G1 between the multiple protruding pieces 5B arranged side by side is smaller than the wavelength of the electromagnetic waves to be shielded from the item. Therefore, even if a gap occurs between the case body 2B and the lid body 3B, the multiple protruding pieces 5B covered with the conductive layer 2m will be exposed in the gap between the case body 2B and the lid body 3B. Therefore, even if a gap occurs between the case body 2B and the lid body 3B, leakage of electromagnetic waves through this gap can be prevented. As a result, for example, an electromagnetic interference suppression effect can be obtained.

[0050] (Variation 4) In the above-described third modification, the entire surfaces of the substrate portion 21, the peripheral wall portion 22, and the protruding piece 5B are covered with the conductive layer 2m, but any configuration is possible as long as at least the portion of the surface of the case body 2B that faces the storage space S is covered with the conductive layer 2m. As a modification, only the portion of the surface of the case body 2B that faces the storage space S may be covered with the conductive layer 2m.

[0051] (Variation 5) In the above-described third modification, the entire surfaces of the lid body side substrate portion 32 and the lid body side peripheral wall portion 33 are covered with the conductive layer 3m, but any configuration is possible as long as at least the surface of the portion of the lid body 3B that faces the storage space S is covered with the conductive layer 3m. As a modification, only the surface of the portion of the lid body 3B that faces the storage space S may be covered with the conductive layer 3m.

[0052] (Other variations) In the above embodiment and modified example, the protruding pieces 5A, 5B are arranged inside the peripheral wall 22 and the lid-side peripheral wall 33, but this is not limitative. The protruding pieces 5A, 5B may be arranged outside the peripheral wall 22 and the lid-side peripheral wall 33.

[0053] Second Embodiment Hereinafter, an embodiment according to the present disclosure will be described with reference to the drawings. As shown in FIG. 10, an electromagnetic wave shielding case 1C of the present disclosure includes a case body 2C, a lid 3C, a connection portion 4, and a protruding piece 5C.

[0054] The case body 2C has a storage space S capable of storing items, and an opening 2a that communicates with the storage space S. At least the surface of the case body 2C facing the storage space S is covered with a conductive layer 2m made of a conductive material.

[0055] The lid 3C is provided to close the opening 2a. At least the surface of the lid 3C facing the storage space S is covered with a conductive layer 3m made of a conductive material. The connection part 4 connects the case body 2C and the lid body 3C.

[0056] The protruding piece 5C is formed on either the case body 2C or the lid body 3C. The protruding piece 5C of the present disclosure is formed on the lid body 3C. The protruding piece 5C protrudes toward the other of the case body 2C and the lid body 3C in the opposing direction Dv in which the case body 2C and the lid body 3C oppose each other. The surface of the protruding piece 5C is covered with a conductive layer 3m made of a conductive material. The protruding piece 5C contacts the conductive layer 2m of the other of the case body 2C and the lid body 3C. A plurality of the protruding pieces 5C are arranged along the periphery of the opening 2a at intervals G1. The intervals G1 between the protruding pieces 5C are smaller than the wavelength of the electromagnetic waves to be blocked from the item.

[0057] In the lid 3C of this embodiment, the spacing G1 between the multiple protruding pieces 5C arranged along the periphery of the opening 2a is smaller than the wavelength of the electromagnetic waves to be blocked from the articles. Therefore, even if a gap occurs between the case body 2C and the lid 3C, the multiple protruding pieces 5C covered with the conductive layer 3m will be exposed in the gap between the case body 2C and the lid 3C. Therefore, even if a gap occurs between the case body 2C and the lid 3C, it is possible to prevent electromagnetic waves from leaking through the gap.

[0058] Third Embodiment Hereinafter, an embodiment according to the present disclosure will be described with reference to the drawings. 11, a lid 3D of the present disclosure is provided to close an opening 2a of a case body 2D. The case body 2D has a storage space S capable of storing items and an opening 2a that communicates with the storage space S. At least the surface of the case body 2D facing the storage space S is covered with a conductive layer 2m made of a conductive material.

[0059] The lid 3D has a protruding piece 5D. The protruding piece 5D protrudes toward the case body 2D in the opposing direction Dv in which the case body 2D and the lid 3D oppose each other. At least the surface of the protruding piece 5D facing the storage space S is covered with a conductive layer 3m made of a conductive material. The protruding piece 5D comes into contact with the conductive layer 2m of the case body 2D.

[0060] The protruding pieces 5D are arranged side by side at intervals G1 along the periphery of the opening 2a, and the intervals G1 between the protruding pieces 5D are smaller than the wavelength of the electromagnetic waves that should be blocked from the article.

[0061] In the lid 3D of this embodiment, the spacing G1 between the multiple protruding pieces 5D arranged along the periphery of the opening 2a is smaller than the wavelength of the electromagnetic waves to be blocked from the articles. Therefore, even if a gap occurs between the case body 2D and the lid 3D, the multiple protruding pieces 5D covered with the conductive layer 3m will be exposed in the gap between the case body 2D and the lid 3D. Therefore, even if a gap occurs between the case body 2D and the lid 3D, it is possible to prevent electromagnetic waves from leaking through the gap.

[0062] <Fourth embodiment> Hereinafter, an embodiment according to the present disclosure will be described with reference to the drawings. 12, a case body 2E of the present disclosure has a storage space S capable of storing an item, and an opening 2a communicating with the storage space S. At least the surface of the case body 2E facing the storage space S is covered with a conductive layer 2m made of a conductive material.

[0063] The case body 2E has a protruding piece 5E. The protruding piece 5E protrudes toward the cover 3E in the opposing direction Dv in which the cover 3E and the case body 2E oppose each other. The cover 3E is provided to close the opening 2a. At least the surface of the cover 3E facing the storage space S is covered with a conductive layer 3m made of a conductive material. The protruding piece 5E comes into contact with the conductive layer 3m of the cover 3E.

[0064] The protruding pieces 5E are arranged side by side at intervals G1 along the periphery of the opening 2a, and the intervals G1 between the protruding pieces 5E are smaller than the wavelength of the electromagnetic waves that should be blocked from the article.

[0065] In the case body 2E of this embodiment, the spacing G1 between the multiple protruding pieces 5E arranged along the periphery of the opening 2a is smaller than the wavelength of the electromagnetic waves to be blocked from the articles. Therefore, even if a gap occurs between the case body 2E and the lid 3E, the multiple protruding pieces 5E covered with the conductive layer 2m will be exposed in the gap between the case body 2E and the lid 3E. Therefore, even if a gap occurs between the case body 2E and the lid 3E, it is possible to prevent electromagnetic waves from leaking through the gap.

[0066] Fifth Embodiment Hereinafter, an embodiment according to the present disclosure will be described with reference to the drawings. As shown in FIG. 13, the method of assembling the electromagnetic shielding case of the present disclosure includes step S21 of arranging the lid to close the opening, and step S22 of connecting the case body and the lid.

[0067] In step S21 of placing the lid body so as to close the opening, the lid body, at least the surface of which facing the storage space S is covered with a conductive layer made of a conductive material, is placed on the case body so as to close the opening. The case body has a storage space capable of storing items and an opening that communicates with the storage space. At least the surface of the case body facing the storage space S is covered with a conductive layer made of a conductive material.

[0068] In step S21 of positioning the lid to close the opening, a protruding piece integrally formed with either the case body or the lid is brought into contact with the conductive layer of the other of the case body and the lid. A plurality of the protruding pieces are arranged side by side at intervals smaller than the wavelength of the electromagnetic waves to be blocked from the item. The protruding pieces protrude toward the other of the case body and the lid in the opposing direction in which the case body and the lid face each other. The surface of the protruding piece is covered with a conductive layer made of a conductive material.

[0069] According to the method for assembling an electromagnetic wave shielding case of this embodiment, an electromagnetic wave shielding case is assembled. In the assembled electromagnetic wave shielding case, the spacing between the multiple projecting pieces arranged along the periphery of the opening is smaller than the wavelength of the electromagnetic waves to be blocked from the item. Therefore, even if a gap occurs between the case body and the lid, the multiple projecting pieces covered with the conductive layer will be exposed in the gap between the case body and the lid. Therefore, even if a gap occurs between the case body and the lid, an electromagnetic wave shielding case can be provided that prevents electromagnetic waves from leaking through this gap.

[0070] Although the present disclosure has been described above with reference to the embodiments, the present disclosure is not limited to the above-described embodiments. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present disclosure within the scope of the present disclosure. Furthermore, each embodiment can be combined with other embodiments as appropriate.

[0071] Some or all of the above-described embodiments can be described as, but are not limited to, the following supplementary notes.

[0072] (Appendix 1) a case body having a storage space capable of storing an article and an opening communicating with the storage space, the surface of at least a portion facing the storage space being covered with a conductive layer made of a conductive material; a cover provided to close the opening, the cover having a surface facing at least the storage space covered with a conductive layer made of a conductive material; a connection portion that connects the case body and the lid; a protruding piece that is formed integrally with one of the case body and the lid, that protrudes toward the other of the case body and the lid in the opposing direction in which the case body and the lid face each other, that has a surface covered with a conductive layer made of a conductive material, and that comes into contact with the conductive layer of the other of the case body and the lid, The protruding pieces are arranged in a row at intervals along the periphery of the opening, and the interval between adjacent protruding pieces is smaller than the wavelength of the electromagnetic waves to be blocked from the object. Electromagnetic wave shielding case.

[0073] (Appendix 2) the protruding piece is in contact with a surface of the conductive layer of the other of the case body and the lid body, and is provided in a non-engaged state with respect to the other of the case body and the lid body. An electromagnetic wave shielding case as described in Appendix 1.

[0074] (Appendix 3) the protruding piece is provided so as to be elastically deformable in a direction intersecting a surface of the conductive layer at a portion of the case body or the lid body that comes into contact with the protruding piece of the other of the case body and the lid body; 3. An electromagnetic wave shielding case according to claim 1 or 2.

[0075] (Appendix 4) The protruding piece is formed in a tapered shape such that the thickness of the portion of the protruding piece that contacts the other of the case body and the lid body in a direction intersecting the surface of the conductive layer gradually decreases as the protruding piece moves away from either the case body or the lid body in the opposing direction. 4. An electromagnetic wave shielding case according to any one of appendices 1 to 3.

[0076] (Appendix 5) the other of the case body and the lid body has, at a portion with which the protruding piece contacts, an inclined surface that is inclined toward the protruding piece in a direction intersecting the surface of the conductive layer at the portion with which the other of the case body and the lid body contacts the protruding piece as the other of the case body and the lid body moves away from the other of the case body and the lid body in the opposing direction; 5. An electromagnetic wave shielding case according to any one of appendices 1 to 4.

[0077] (Appendix 6) the protruding piece is formed in a rectangular shape when viewed from a direction intersecting the surface of the conductive layer at a portion that contacts the protruding piece of the other of the case body and the lid body; 6. An electromagnetic wave shielding case according to any one of appendices 1 to 5.

[0078] (Appendix 7) The connection portion is a screw inserted through an insertion hole formed in the lid, the case body has a screw-connected portion having a screw hole into which the screw is fastened, a gap between the screw-connected portion and the protruding piece adjacent to the screw-connected portion is smaller than the wavelength of the electromagnetic wave to be blocked; 7. An electromagnetic wave shielding case according to any one of appendices 1 to 6.

[0079] (Appendix 8) The case body includes: a plate-shaped substrate portion; a peripheral wall portion that rises from the outer periphery of the base portion toward the lid body in the opposing direction, The protruding piece is formed on the lid body and is in contact with a part of the inner circumferential surface of the peripheral wall portion. 8. An electromagnetic wave shielding case according to any one of appendices 1 to 7.

[0080] (Appendix 9) The lid body is a plate-shaped lid body side substrate portion; a lid-side peripheral wall portion that rises from an outer periphery of the lid-side substrate portion toward the case body in the opposing direction, The protruding piece is formed on the case body and is in contact with a part of the inner circumferential surface of the lid-side peripheral wall portion. 8. An electromagnetic wave shielding case according to any one of appendices 1 to 7.

[0081] (Appendix 10) A lid provided to close an opening of a case body having a storage space capable of storing an article and an opening communicating with the storage space, a protruding piece that protrudes toward the case body in the opposing direction in which the case body and the lid body oppose each other, the surface of which is covered with a conductive layer made of a conductive material, and that comes into contact with the conductive layer of the case body; The protruding pieces are arranged in a row at intervals along the periphery of the opening, and the interval between adjacent protruding pieces is smaller than the wavelength of the electromagnetic waves to be blocked from the object. Lid body.

[0082] (Appendix 11) A case body having a storage space capable of storing an article and an opening communicating with the storage space, at least a surface of a portion facing the storage space being covered with a conductive layer made of a conductive material, a lid provided to close the opening, the surface of which at least faces the storage space and is covered with a conductive layer made of a conductive material, and a protruding piece protruding toward the lid in a direction in which the case body and the case body face each other, the protruding piece having a surface covered with a conductive layer made of a conductive material and in contact with the conductive layer of the lid, The protruding pieces are arranged in a row at intervals along the periphery of the opening, and the interval between adjacent protruding pieces is smaller than the wavelength of the electromagnetic waves to be blocked from the object. Case body.

[0083] (Appendix 12) a step of disposing a lid body, the surface of which at least faces the storage space and is covered with a conductive layer made of a conductive material, on a case body having a storage space capable of storing an item and an opening communicating with the storage space, the surface of which at least faces the storage space being covered with a conductive layer made of a conductive material, so as to close the opening; and connecting the case body and the lid body, In the step of arranging the lid body so as to close the opening, a plurality of the lid bodies are arranged integrally with either one of the case body or the lid body along the periphery of the opening at intervals smaller than the wavelength of the electromagnetic waves to be blocked from the article, and protruding pieces protruding toward the other of the case body and the lid body in the opposing direction in which the case body and the lid body face each other, and having a surface covered with a conductive layer made of a conductive material, are brought into contact with the conductive layer of the other of the case body and the lid body. How to assemble an electromagnetic wave shielding case.

[0084] Furthermore, some or all of the configurations described in Supplementary Notes 2 to 9, which are dependent on Supplementary Note 1, may also be dependent on Supplementary Notes 10, 11, and 12 in the same dependent relationship as Supplementary Notes 2 to 9. Furthermore, not limited to Supplementary Notes 1, 10, 11, and 12, some or all of the configurations described as Supplements may be similarly made dependent on various configurations within the scope of the above-described embodiments. [Explanation of symbols]

[0085] 1A~1C Electromagnetic wave shielding case 2A~2E Case body 2a aperture 2m conductive layer 3A~3E Lid body 3m conductive layer 4 Connection 5A~5E, 5Ac protruding piece 21 Circuit board 22 Peripheral wall section 22a First wall 22b Second wall 22f Inner surface 23 Tip surface 24 Guide surface 25 Slope 26 Threaded connection part 26h screw hole 31 Lid body 31a First outer edge 31b Second outer edge 31h Insertion hole 32 Cover side substrate 32h Insertion hole 33 Lid side peripheral wall part 41 screws 51, 53 First protruding piece group 52, 54 Second protruding piece group S Storage space

Claims

1. a case body having a storage space capable of storing an article and an opening communicating with the storage space, the surface of at least a portion facing the storage space being covered with a conductive layer made of a conductive material; a cover provided to close the opening, the cover having a surface facing at least the storage space covered with a conductive layer made of a conductive material; a connection portion that connects the case body and the lid; a protruding piece that is formed integrally with one of the case body and the lid, that protrudes toward the other of the case body and the lid in the opposing direction in which the case body and the lid face each other, that has a surface covered with a conductive layer made of a conductive material, and that comes into contact with the conductive layer of the other of the case body and the lid, The protruding pieces are arranged in a row at intervals along the periphery of the opening, and the interval between adjacent protruding pieces is smaller than the wavelength of the electromagnetic waves to be blocked from the object. Electromagnetic wave shielding case.

2. the protruding piece is in contact with a surface of the conductive layer of the other of the case body and the lid body, and is provided in a non-engaged state with respect to the other of the case body and the lid body. The electromagnetic wave shielding case according to claim 1 .

3. the protruding piece is provided so as to be elastically deformable in a direction intersecting a surface of the conductive layer at a portion of the case body or the lid body that comes into contact with the protruding piece of the other of the case body and the lid body; 3. The electromagnetic wave shielding case according to claim 1 or 2.

4. The protruding piece is formed in a tapered shape such that the thickness of the portion of the protruding piece that contacts the other of the case body and the lid body in a direction intersecting the surface of the conductive layer gradually decreases as the protruding piece moves away from either the case body or the lid body in the opposing direction.

3. The electromagnetic wave shielding case according to claim 1 or 2.

5. the other of the case body and the lid body has, at a portion with which the protruding piece contacts, an inclined surface that is inclined toward the protruding piece in a direction intersecting the surface of the conductive layer at the portion with which the other of the case body and the lid body contacts the protruding piece as the other of the case body and the lid body moves away from the other of the case body and the lid body in the opposing direction; 3. The electromagnetic wave shielding case according to claim 1 or 2.

6. the protruding piece is formed in a rectangular shape when viewed from a direction intersecting the surface of the conductive layer at a portion that contacts the protruding piece of the other of the case body and the lid body; 3. The electromagnetic wave shielding case according to claim 1 or 2.

7. The connection portion is a screw inserted through an insertion hole formed in the lid, the case body has a screw-connected portion having a screw hole into which the screw is fastened, a gap between the screw-connected portion and the protruding piece adjacent to the screw-connected portion is smaller than the wavelength of the electromagnetic wave to be blocked; 3. The electromagnetic wave shielding case according to claim 1 or 2.

8. A lid provided to close an opening of a case body having a storage space capable of storing an article and an opening communicating with the storage space, a protruding piece that protrudes toward the case body in the opposing direction in which the case body and the lid body oppose each other, the surface of which is covered with a conductive layer made of a conductive material, and that comes into contact with the conductive layer of the case body; The protruding pieces are arranged in a row at intervals along the periphery of the opening, and the interval between adjacent protruding pieces is smaller than the wavelength of the electromagnetic waves to be blocked from the article. Lid body.

9. A case body having a storage space capable of storing an article and an opening communicating with the storage space, at least a surface of a portion facing the storage space being covered with a conductive layer made of a conductive material, a lid provided to close the opening, the surface of which at least faces the storage space and is covered with a conductive layer made of a conductive material, and a protruding piece protruding toward the lid in a direction in which the case body and the case body face each other, the protruding piece having a surface covered with a conductive layer made of a conductive material and in contact with the conductive layer of the lid, The protruding pieces are arranged in a row at intervals along the periphery of the opening, and the interval between adjacent protruding pieces is smaller than the wavelength of the electromagnetic waves to be blocked from the object. Case body.

10. a step of disposing a lid body, the surface of which at least faces the storage space and is covered with a conductive layer made of a conductive material, on a case body having a storage space capable of storing an item and an opening communicating with the storage space, the surface of which at least faces the storage space being covered with a conductive layer made of a conductive material, so as to close the opening; and connecting the case body and the lid body, In the step of arranging the lid body so as to close the opening, a plurality of the lid bodies are arranged integrally with either one of the case body or the lid body along the periphery of the opening at intervals smaller than the wavelength of the electromagnetic waves to be blocked from the article, and protruding pieces protruding toward the other of the case body and the lid body in the opposing direction in which the case body and the lid body face each other, and having a surface covered with a conductive layer made of a conductive material, are brought into contact with the conductive layer of the other of the case body and the lid body. How to assemble an electromagnetic wave shielding case.

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