JP2015188023A - electromagnetic shield member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the reduction in shield performance of a bent part in an electromagnetic shield member for shielding the electromagnetic noise.SOLUTION: An electromagnetic shield member 1 includes: a main shield body 2; and an auxiliary shield body 3. The main shield body 2 includes a plurality of cylindrically gathered strands 20. The auxiliary shield body 3 includes an elastic sheet material 30 including a sheet-like conductive rubber or magnetic rubber. The auxiliary shield body 3 covers a gap between strands 20 formed along at least a part of region in the main shield body 2.

Description

  The present invention relates to an electromagnetic shielding member that shields electromagnetic noise.

  In a wire harness mounted on a vehicle, a shielded electric wire includes an electric wire to be shielded and an electromagnetic shield member that collectively covers the electric wire. The electromagnetic shield member surrounds the electric wire and shields electromagnetic noise.

  For example, as shown in Patent Document 1, the electromagnetic shielding member is a braided wire in which a large number of strands (conductive wires) are knitted into a cylindrical shape. Since the braided wire can be bent and deformed, the braided wire is often used when the shielded electric wire is wired in a curved path.

JP 2013-074650 A

  When the shielded electric wire shown in Patent Document 1 is wired in a curved path, the gap between the knitted strands in the bent portion of the electromagnetic shield member may be greatly widened. In this case, the shielding performance of the portion where the gap between the strands in the shielded electric wire is widened is deteriorated.

  An object of the present invention is to suppress a decrease in shielding performance of a bent portion of an electromagnetic shielding member in an electromagnetic shielding member that shields electromagnetic noise.

  The electromagnetic shielding member according to the first aspect includes a main shield body and an auxiliary shield body. The main shield body includes a plurality of strands assembled in a cylindrical shape. The auxiliary shield body includes an elastic sheet material including a sheet-like conductive rubber or magnetic rubber. The auxiliary shield body is formed along at least a part of the main shield body and covers a gap between the strands.

  The electromagnetic shielding member which concerns on a 2nd aspect is an aspect of the electromagnetic shielding member which concerns on a 1st aspect. In the electromagnetic shielding member according to the second aspect, the auxiliary shield body is formed integrally with the plurality of strands in the main shield body.

  The electromagnetic shielding member according to the third aspect is an aspect of the electromagnetic shielding member according to the second aspect. In the electromagnetic shield member according to the third aspect, the elastic sheet material of the auxiliary shield body is formed in a cylindrical shape, and a plurality of the plurality of strands are connected in parallel with a gap in the circumferential direction. The above strands are gathered in a cylindrical shape.

  The electromagnetic shielding member which concerns on a 4th aspect is an aspect of the electromagnetic shielding member which concerns on a 3rd aspect. In the electromagnetic shielding member which concerns on a 4th aspect, the said elastic sheet material of the said auxiliary shield body has the structure formed in the cylinder shape, when the two edge parts are connected.

  The electromagnetic shielding member according to the fifth aspect is an aspect of the electromagnetic shielding member according to any one of the second to fourth aspects. In the electromagnetic shielding member which concerns on a 5th aspect, the area | region covering the perimeter of at least one part in the said main shield body is embedded in the said auxiliary shield body formed in the cylinder shape.

  The electromagnetic shielding member according to the sixth aspect is an aspect of the electromagnetic shielding member according to the first aspect. In the electromagnetic shielding member according to the sixth aspect, the auxiliary shield body is bent in a spiral shape in a natural state and can be elastically deformed into an extended shape, and the main shield body can be elastically deformed by the elastic force. Maintain the state of wrapping around.

  The electromagnetic shielding member which concerns on a 7th aspect is an aspect of the electromagnetic shielding member which concerns on a 6th aspect. In the electromagnetic shielding member according to the seventh aspect, the auxiliary shield body is a spiral that is integrally formed with the elastic sheet material and is bent in a spiral shape in a natural state, and is elastically deformable into an extended shape. A member is further provided. The auxiliary shield body maintains the state of being wound around the main shield body by the elastic force of the spiral member.

  In each of the above embodiments, consider a case where the electromagnetic shield member is attached along a curved path. In this case, since the auxiliary shield body having the elastic sheet material has flexibility, it does not hinder the bending deformation of the main shield body.

  Furthermore, even if the gap between the strands widens in the bent portion of the main shield body, if the auxiliary shield body is formed in that portion, the auxiliary shield body having conductivity or magnetism will deteriorate the shielding performance. Suppress.

  Moreover, in said 2nd aspect, the auxiliary | assistant shield body is integrally formed with the some strand in the main shield body. In this case, since the auxiliary shield body maintains the positional relationship between the strands of the main shield body, it is difficult for the gap between the strands to expand at the bent portion of the electromagnetic shield member. As a result, it is possible to more reliably prevent the shield performance from being lowered at the bent portion.

  Furthermore, according to the 2nd aspect, the number of parts which comprise an electromagnetic shielding member can be decreased. Further, in the assembly process of the wire harness including the electromagnetic shield member, the number of work steps can be reduced as compared with the case where the main shield body and the auxiliary shield body are individually attached.

  Moreover, in said 3rd aspect, the elastic sheet material of an auxiliary | assistant shield body is formed in the cylinder shape, and has connected the strand in the state which mutually paralleled the some strand in the circumferential direction. Thus, the plurality of strands are collected in a cylindrical shape. In this case, the strands of the main shield body can be arranged substantially in parallel with the shielded electric wire.

  Moreover, in said 4th aspect, an elastic sheet material also serves as the connection part which connects a some strand in a comb shape. Accordingly, it is possible to prevent the plurality of strands from being separated and to facilitate the work of collecting the plurality of strands into a cylindrical shape.

  Moreover, the electromagnetic shielding member which concerns on a 4th aspect can be retrofitted with respect to the electric wire of shielding object. For example, it is possible to attach this electromagnetic shielding member after the end treatment of the electric wire to be shielded. In this case, it is possible to increase the degree of freedom of work procedures in the assembly process of the wire harness. Moreover, the operation | work which attaches an electromagnetic shielding member to the electric wire of shielding object can also be made easier.

  In the fifth aspect, at least a part of the main shield body that extends over the entire circumference is embedded in the auxiliary shield body that is formed in a cylindrical shape. In this case, the auxiliary shield body prevents liquid such as water from being applied to the main shield body. That is, the electromagnetic shielding member according to the fifth aspect is effective when a waterproof or drip-proof performance is required for the shielded electric wire including the electromagnetic shielding member.

  In the sixth and seventh aspects described above, the auxiliary shield body has a function of maintaining the state of being wound around the main shield body itself by the elastic force that tends to be spiral. Therefore, it is possible to easily attach the auxiliary shield body to a portion of the main shield body that needs shield assistance.

It is a side perspective view of electromagnetic shielding member 1 concerning a 1st embodiment. 1 is a cross-sectional view of an electromagnetic shield member 1. 2 is a developed perspective view of the electromagnetic shield member 1. FIG. It is sectional drawing of 1 A of electromagnetic shielding members which concern on 2nd Embodiment. It is a side perspective view of electromagnetic shielding member 1B concerning a 3rd embodiment. It is a front view of electromagnetic shielding member 1B. It is a perspective view of the auxiliary shield body contained in electromagnetic shielding member 1B. It is a partial exploded perspective view of electromagnetic shielding member 1B. It is a side perspective view of electromagnetic shielding member 1C concerning a 4th embodiment. It is a partial exploded perspective view of electromagnetic shielding member 1C. It is a side perspective view of electromagnetic shielding member 1D concerning a 5th embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The following embodiment is an example embodying the present invention, and is not an example of limiting the technical scope of the present invention.

<First Embodiment>
The electromagnetic shielding member 1 according to the first embodiment will be described with reference to FIGS. The electromagnetic shield member 1 includes a cylindrical main shield body 2 and an auxiliary shield body 3 formed along at least a part of the main shield body 2.

  The electromagnetic shield member 1 is used in a state where the electric wire 9 is passed through the hollow portion of the main shield body 2 included in the electromagnetic shield member 1. The shielded electric wire provided with the electromagnetic shielding member 1 and the electric wire 9 is assembled as a wire harness mounted on a vehicle such as an automobile, for example. In FIGS. 1 and 2, the electric wire 9 is drawn with a virtual line (two-dot chain line).

  The electric wire 9 is an insulated wire having, for example, a conductor mainly composed of copper or aluminum and an insulating coating covering the periphery of the conductor.

  In the example shown in FIGS. 1 and 2, the electromagnetic shield member 1 surrounds the three electric wires 9. In addition, when the electromagnetic shielding member 1 encloses the one electric wire 9, the case where the two electric wires 9 are enclosed, or the case where the four or more electric wires 9 are enclosed is also considered.

<Main shield body>
The main shield body 2 includes a plurality of strands 20 assembled in a cylindrical shape. The main shield body 2 composed of a plurality of strands 20 can be bent and deformed.

  In the present embodiment, the plurality of strands 20 included in the main shield body 2 are arranged in parallel at intervals without crossing each other. The main shield body 2 can be deformed along a curved path.

  The cylindrical main shield body 2 surrounds the shielded electric wire 9 and shields electromagnetic noise. In the present embodiment, in a state where the electric wire 9 is passed through the hollow portion of the main shield body 2, the plurality of strands 20 are arranged along the longitudinal direction of the electric wire 9 and around the electric wire 9.

  The strand 20 is a bare wire which has copper or aluminum as a main component, for example. In addition, the case where the main shield body 2 contains the enameled wire further formed with the insulation coating which covers the circumference | surroundings of the strand 20 or what is called a vinyl electric wire etc. is also considered.

  In the present embodiment, the plurality of strands 20 in the main shield body 2 are formed integrally with the auxiliary shield body 3. That is, each of the plurality of strands 20 is connected to each other by the auxiliary shield body 3 with a space therebetween.

  The number of the strands 20 which comprise the main shield body 2, and the space | interval between the strands 20 are determined by the shielding performance requested | required of this main shield body 2, for example.

  In a state where the main shield body 2 alone surrounds the periphery of the electric wire 9 wired along the straight path, the spacing between the strands 20 is maintained in a state satisfying the required shielding performance. However, when the electric wire 9 is wired in a bent path, the main shield body 2 alone has a portion where the gap between the strands 20 in the bent portion of the main shield body 2 is increased, and the shielding performance may be deteriorated. is there.

<Auxiliary shield body>
The auxiliary shield body 3 includes an elastic sheet material 30 including a sheet-like conductive rubber or magnetic rubber. For example, the material of the elastic sheet material 30 included in the auxiliary shield body 3 is determined by the frequency of noise at the place where the electric wire 9 is wired. In the present embodiment, the auxiliary shield body 3 is the elastic sheet material 30 itself.

  It is conceivable that the elastic sheet material 30 includes, for example, copper or carbon as conductive rubber. The elastic sheet material 30 may include, for example, iron or ferrite as a magnetic rubber.

  In the electromagnetic shield member 1, the auxiliary shield body 3 is formed along at least a part of the main shield body 2 and covers a gap between the strands 20. Thereby, the shield performance of the part which the main shield body 2 and the auxiliary shield body 3 overlapped improves.

  In the present embodiment, the auxiliary shield body 3 is formed in a region other than the both end portions 29 of the main shield body 2 in the longitudinal direction of the main shield body 2. Therefore, the strand 20 is exposed at the end 29 of the main shield body 2. Moreover, when the insulation coating is further formed on the strand 20, the insulation coating covering each of the strands 20 is removed at the end 29 of the main shield body 2.

  In the present embodiment, the auxiliary shield body 3 is formed over the entire circumference of the main shield body 2 in the circumferential direction of the main shield body 2. That is, the elastic sheet material 30 of the auxiliary shield body 3 is formed in a cylindrical shape.

  In the example shown in FIG. 1, a portion of the main shield body 2 where the auxiliary shield body 3 is not formed, that is, an end portion 29 of the main shield body 2 is connected to a shield connection portion in a shield shell member (not shown), for example. The The shield shell member is a metal member that is connected to a housing that houses the electrical equipment to which the electric wire 9 to be shielded is connected. The shield connection part is a cylindrical part to which the main shield body 2 is connected.

  For example, a caulking member (not shown) is caulked from the outer periphery of the end portion 29 of the main shield body 2 in a state where the end portion 29 of the main shield body 2 is covered with the shield connection portion of the shield shell member. Thereby, conduction between the main shield body 2 of the electromagnetic shield member 1 and the shield shell member is achieved. The caulking member may be a caulking ring or an caulking band.

  In the present embodiment, each of the strands 20 (conductors) is directly clamped with a caulking member without using an elastic member, and is strongly pressed against the shield connection portion of the shield shell member. Therefore, each strand 20 (conductor) is firmly caulked against the shield shell member, and the electrical resistance between the main shield body 2 and the shield shell member is reduced.

  Moreover, the case where the auxiliary shield body 3 is formed in a part in the circumferential direction of the main shield body 2 is also considered. In this case, since the auxiliary shield body 3 covers only the portion of the main shield body 2 where the auxiliary shield body 3 is necessary, the manufacturing cost of the electromagnetic shield member 1 can be suppressed.

  Further, as described above, in the present embodiment, the auxiliary shield body 3 is formed integrally with the plurality of strands 20 in the main shield body 2. Therefore, the auxiliary shield body 3 also serves as a connecting portion that connects the plurality of strands 20 in a state of being parallel to each other at intervals in the circumferential direction.

  Moreover, in this embodiment, the area | region over the perimeter of at least one part in the main shield body 2 is embedded in the state buried in the auxiliary shield body 3 formed in the cylinder shape. Therefore, each of the plurality of strands 20 exists between the outer peripheral surface and the inner peripheral surface of the auxiliary shield body 3. In this case, the positional relationship between each of the plurality of strands 20 is kept constant by the auxiliary shield body 3 existing around the strands 20.

  Furthermore, in this embodiment, the elastic sheet material 30 of the auxiliary shield body 3 has a structure formed in a cylindrical shape by connecting the two edge portions 301.

  For example, as shown in FIG. 3, the auxiliary shield body 3 is formed by bending a flat elastic sheet material 30 in which a plurality of strands 20 arranged in parallel along a linear direction are insert-molded into a cylindrical shape. ,can get. In this case, the elastic sheet material 30 that is relatively easy to be bent into a cylindrical shape is bent into a cylindrical shape, whereby the plurality of strands 20 are also formed into a cylindrical shape.

  Further, in the example shown in FIG. 3, a joint portion 31 is formed at a portion where the two edge portions 301 of the elastic sheet material 30 are connected. The joint part 31 is a part bonded by an adhesive, for example. It is also conceivable that the joint portion 31 is a welded portion in which a part of the elastic sheet material 30 is melted and bonded.

<Effect>
In this embodiment, the case where the electromagnetic shielding member 1 is attached along the curved path is considered. In this case, since the auxiliary shield body 3 having the elastic sheet material 30 has flexibility, it does not hinder the bending deformation of the main shield body 2.

  Furthermore, even if the gap between the strands 20 spreads in the bent portion of the main shield body 2, if the auxiliary shield body 3 is formed in that portion, the auxiliary shield body 3 having conductivity or magnetism is Suppresses the decrease in shielding performance.

  In the present embodiment, the auxiliary shield body 3 is formed integrally with the plurality of strands 20 in the main shield body 2. In this case, since the auxiliary shield body 3 maintains the positional relationship between the strands 20 of the main shield body 2, it is difficult for the gap between the strands 20 to be widened at the bent portion of the electromagnetic shield member 1. As a result, it is possible to more reliably prevent a decrease in shielding performance at the bent portion.

  Furthermore, according to the present embodiment, since the auxiliary shield body 3 is integrally formed with the plurality of strands 20 in the main shield body 2, the number of parts constituting the electromagnetic shield member 1 can be reduced. Further, in the assembly process of the wire harness including the electromagnetic shield member 1, the number of work steps can be reduced as compared with the case where the main shield body 2 and the auxiliary shield body 3 are individually attached.

  Moreover, in this embodiment, the elastic sheet material 30 of the auxiliary shield body 3 is formed in a cylindrical shape, and a plurality of strands 20 are connected in parallel with a gap in the circumferential direction. Thereby, the some strand 20 is collected in the cylinder shape. In this case, the strands 20 of the main shield body 2 can be arranged substantially in parallel with the electric wire 9 to be shielded.

  Moreover, in this embodiment, the elastic sheet material 30 also serves as a connecting portion that connects the plurality of strands 20 in an interdigital shape. Accordingly, it is possible to prevent the plurality of strands 20 from being scattered and to facilitate the work of gathering the plurality of strands 20 into a cylindrical shape.

  Moreover, the electromagnetic shielding member 1 which concerns on this embodiment can be retrofitted with respect to the electric wire 9 to be shielded. For example, the electromagnetic shielding member 1 can be attached after the end treatment of the electric wire 9 to be shielded. In this case, it is possible to increase the degree of freedom of work procedures in the assembly process of the wire harness. Moreover, the operation | work which attaches the electromagnetic shielding member 1 to the electric wire 9 of shielding object can also be made easier.

  Moreover, in this embodiment, the area | region covering the perimeter of at least one part in the main shield body 2 is embedded in the auxiliary shield body 3 formed in the cylinder shape. In this case, the auxiliary shield body 3 prevents the main shield body 2 from being exposed to liquids such as water. That is, the electromagnetic shield member 1 is effective when the shielded electric wire including the electromagnetic shield member 1 is required to be waterproof or drip-proof.

Second Embodiment
Next, an electromagnetic shielding member 1A according to the second embodiment will be described with reference to FIG. FIG. 4 is a cross-sectional view of the electromagnetic shielding member 1A. In the electromagnetic shield member 1 </ b> A, the auxiliary shield body 3 exists in a part of the plurality of strands 20 in the circumferential direction. In FIG. 4, the same components as those shown in FIGS. 1 to 3 are given the same reference numerals. Hereinafter, the difference of the electromagnetic shielding member 1A from the electromagnetic shielding member 1 will be described.

  The electromagnetic shield member 1 </ b> A includes an auxiliary shield body 3 formed integrally with the main shield body 2.

  The present embodiment is an example of the case where the auxiliary shield body 3 exists around a part of the range in the circumferential direction of the strand 20 in the main shield body 2.

  The example shown in FIG. 4 is a case where a part of the outer peripheral surface of each of the strands 20 included in the main shield body 2 is embedded in the auxiliary shield body 3. In the example shown in FIG. 4, a part of the strand 20 is exposed on the inner peripheral surface side of the auxiliary shield body 3.

  Also in the present embodiment, it is possible to suppress a decrease in shielding performance at the bent portion of the main shield body 2.

  It is also conceivable that the auxiliary shield body 3 is formed over the entire length of the main shield body 2. For example, when the cylindrical auxiliary shield body 3 is formed over the entire length of the main shield body 2, liquid such as water is applied to the electric wire 9 surrounded by the main shield body 2, and stepping stones, etc. It is possible to prevent foreign objects from coming into contact with each other.

<Third Embodiment>
Next, the electromagnetic shielding member 1B according to the third embodiment will be described with reference to FIGS. The electromagnetic shield member 1B includes an auxiliary shield body 3B having a structure different from that of the auxiliary shield body 3 included in the electromagnetic shield members 1 and 1A. In the present embodiment, the main shield body 2B included in the electromagnetic shield member 1B also has a different structure from the main shield body 2 included in the electromagnetic shield members 1 and 1A.

  FIG. 5 is a side perspective view of the electromagnetic shielding member 1B. FIG. 6 is a front view of the electromagnetic shielding member 1B. FIG. 7 is a partially exploded perspective view of the auxiliary shield body 3B included in the electromagnetic shield member 1B. FIG. 8 is a perspective view showing the main shield body 2B and the auxiliary shield body 3B.

  5 to 8, the same constituent elements as those shown in FIGS. 1 to 4 are denoted by the same reference numerals. 5 and 8, the wire 20 is depicted in a simplified manner. Hereinafter, the points of the electromagnetic shielding member 1B different from the electromagnetic shielding members 1 and 1A will be described.

  The main shield body 2B includes a plurality of strands 20 assembled in a cylindrical shape. In the present embodiment, the main shield body 2B has a structure in which a plurality of strands 20 are knitted and formed into a cylindrical shape.

  The auxiliary shield body 3 </ b> B includes an elastic sheet material 30 and a spiral member 30 </ b> B formed integrally with the elastic sheet material 30.

  The spiral member 30B has a spiral shape in the natural state. Note that the natural state refers to a state where no external force is applied. For example, the spiral member 30B in the natural state means the spiral member 30B in a state where no external force is applied.

  Further, the spiral member 30B is a member that can be elastically deformed from a spiral shape to a shape in which the bending is extended by applying an external force to the spiral member 30B. Hereinafter, the shape in which the curve is extended is referred to as an extended shape. When the external force applied to the elongated spiral member 30B is removed, the spiral member 30B returns to the spiral shape again.

  For example, the spiral member 30B is a metal or resin member. For example, it is conceivable that the spiral member 30B is a spring made of metal or resin.

  In the example shown in FIG. 7, the spiral member 30 </ b> B is embedded in the elastic sheet material 30. That is, in the example shown in FIG. 7, the auxiliary shield body 3 </ b> B includes an elastic sheet material 30 and a spiral member 30 </ b> B integrally formed by being embedded in the elastic sheet material 30.

  For example, the auxiliary shield body 3B is obtained by insert-molding the elastic sheet material 30 using the spiral member 30B extended into a flat belt shape as an insert. The auxiliary shield body 3B has a spiral shape due to the spiral member 30B embedded in the elastic sheet material 30 in a natural state.

  In addition, in the manufacturing process of the auxiliary shield body 3B, it is also conceivable that the spiral member 30B extended into a flat belt shape is bonded to the elastic sheet material 30 formed in advance. It is also conceivable that the spiral member 30 </ b> B extended into a flat band shape is inserted into a band-shaped space in the elastic sheet material 30 that has been formed in advance. Also in these cases, the auxiliary shield body 3B has a spiral shape in the natural state.

  FIG. 8 shows a state where the auxiliary shield body 3B is extended when attached to the main shield body 2B.

  For example, as shown in FIG. 8, an external force is applied to the auxiliary shield body 3B, and the auxiliary shield body 3B is deformed into an extended shape. Then, the extended auxiliary shield body 3B is brought close to the main shield body 2B. When the external force applied to the auxiliary shield body 3B is removed, the auxiliary shield body 3B tries to return from the stretched shape to the spiral shape again by the elastic force of the spiral member 30B. The auxiliary shield body 3B is attached to the main shield body 2B using the elastic force to return to the spiral shape.

  Accordingly, in the electromagnetic shield member 1B, as shown in FIG. 6, the auxiliary shield body 3B maintains the state of being wound around the main shield body 2B by the elastic force of the spiral member 30B.

  In the present embodiment, the auxiliary shield body 3B has a function of maintaining the state of being wound around the main shield body 2B by the elastic force that tends to be spiral. Therefore, it is possible to easily attach the auxiliary shield body 3B to a portion of the main shield body 2B that needs shield assistance.

<Fourth embodiment>
Next, an electromagnetic shielding member 1C according to the fourth embodiment will be described with reference to FIGS. The electromagnetic shield member 1C includes an auxiliary shield body 3C having a different structure from the auxiliary shield body 3 included in the electromagnetic shield members 1 and 1A and the auxiliary shield body 3B included in the electromagnetic shield member 1B.

  FIG. 9 is a side perspective view of the electromagnetic shielding member 1C. FIG. 10 is a perspective view illustrating a state in which the auxiliary shield body 3C is attached to the main shield body 2B included in the electromagnetic shield member 1C. 9 and 10, the same components as those shown in FIGS. 1 to 8 are given the same reference numerals. Hereinafter, the points of the electromagnetic shielding member 1C different from the electromagnetic shielding members 1, 1A, 1B will be described.

  The auxiliary shield body 3C included in the electromagnetic shield member 1C includes an elastic sheet material 30C. In the present embodiment, the auxiliary shield body 3C is the elastic sheet material 30C itself.

  The elastic sheet material 30C is formed in a spiral shape in a natural state, and can be elastically deformed into a shape that extends the curvature.

  The auxiliary shield body 3C maintains the state of being wound around the main shield body 2B by the elastic force of the elastic sheet material 30C.

  Also in the present embodiment, the auxiliary shield body 3C has a function of maintaining the state of being wound around the main shield body 2B by the elastic force that tends to be spiral. Therefore, it is possible to easily attach the auxiliary shield body 3C to a portion of the main shield body 2B that needs shield assistance.

<Fifth Embodiment>
Next, an electromagnetic shielding member 1D according to the fifth embodiment will be described with reference to FIG. The electromagnetic shield member 1D has a main shield body 2D having a structure different from that of the main shield body 2 included in the electromagnetic shield member 1.

  FIG. 11 is a side perspective view of the electromagnetic shielding member 1D. In FIG. 11, the same components as those shown in FIGS. 1 to 10 are given the same reference numerals. Hereinafter, the points of the electromagnetic shielding member 1D that are different from the electromagnetic shielding members 1, 1A, 1B, and 1C will be described.

  In the present embodiment, the main shield body 2D has a structure in which a plurality of strands 20 are knitted into a cylindrical shape, like the main shield body 2B.

  Moreover, in this embodiment, the area | region over the perimeter of at least one part in main shield body 2D is embedded in the state buried in the auxiliary shield body 3 formed in the cylinder shape. Therefore, each of the plurality of strands 20 exists between the outer peripheral surface and the inner peripheral surface of the auxiliary shield body 3. In this case, the positional relationship between each of the plurality of strands 20 is kept constant by the auxiliary shield body 3 existing around the strands 20.

  Also in the present embodiment, it is possible to suppress a decrease in shielding performance at the bent portion of the main shield body 2D.

<Others>
It can be considered that the electromagnetic shielding member 1 according to the first embodiment and the electromagnetic shielding member 1B according to the third embodiment are used according to the required specifications of the shielding performance. For example, when the electromagnetic shielding member 1B according to the third embodiment is adopted at a place where the required specification of the shielding performance is strict, and the electromagnetic shielding member 1 according to the first embodiment is adopted at a place where the required specification of the shielding performance is loose Etc. are considered.

<Application example>
It is also conceivable that the auxiliary shield body 3B in the electromagnetic shield member 1B includes an elastic sheet material 30C instead of the elastic sheet material 30.

  Moreover, in 1st Embodiment, the case where the some strand 20 in the main shield body 2 is located in a line without crossing without crossing is also considered. For example, this is the case where the plurality of strands 20 are welded only at the ends of the strands 20 by welding or the like, or are bonded only at the ends of the strands 20 with an adhesive. Also in this case, the main shield body 2 can have a bent shape.

  Moreover, in 3rd Embodiment and 4th Embodiment, the case where the electromagnetic shielding members 1B and 1C are provided with the main shield body 2 instead of the main shield body 2B is also considered.

  Moreover, in 2nd Embodiment, the case where the part of the strand 20 has been exposed in the outer peripheral surface side of the auxiliary shield body 3 is also considered.

  Moreover, in 1st Embodiment and 2nd Embodiment, instead of the junction part 31, the case where it connects by the two edge parts 301 of the elastic sheet material 30 being bonded together is also considered.

  Further, in each embodiment, the auxiliary shield bodies 3, 3A, 3B, 3C are formed in a cylindrical shape by winding the adhesive tape around the elastic sheet materials 30, 30B, 30C in a state where the two edge portions 301 overlap. The case where it is done is also considered.

  Moreover, the case where the elastic sheet material 30 is formed in the cylinder shape by extrusion molding is also considered.

  Moreover, in 1st Embodiment and 2nd Embodiment, the some strand 20 arranged in parallel along the linear direction is adhere | attached on the elastic sheet material 30 with an adhesive agent, and the case where it forms integrally is also considered. .

  Moreover, in 5th Embodiment, the case where a part of outer peripheral surface in each strand 20 contained in the main shield body 2D is embedded in the auxiliary shield body 3 is also considered. For example, it is considered that a part of the wire 20 is exposed on the inner peripheral surface side of the auxiliary shield body 3 or a part of the wire 20 is exposed on the outer peripheral surface side of the auxiliary shield body 3. It is done.

  In addition, the electromagnetic shielding member according to the present invention can be freely combined with each of the embodiments and application examples described above within the scope of the invention described in each claim, or each of the embodiments and application examples as appropriate. It is also possible to constitute by changing or omitting a part.

DESCRIPTION OF SYMBOLS 1 Electromagnetic shield member 1A Electromagnetic shield member 1B Electromagnetic shield member 1C Electromagnetic shield member 1D Electromagnetic shield member 2 Main shield body 20 Wire 29 End 2B Main shield body 2D Main shield body 3 Auxiliary shield body 30 Elastic sheet material 301 Edge 30B Spiral member 30C Elastic sheet material 31 Joint 3B Auxiliary shield body 3C Auxiliary shield body 9 Electric wire

Claims (7)

A main shield body including a plurality of strands assembled in a cylindrical shape;
An electromagnetic shield comprising: an elastic sheet material including a sheet-like conductive rubber or magnetic rubber, and an auxiliary shield body that is formed along at least a part of the main shield body and covers a gap between the strands. Element. The electromagnetic shielding member according to claim 1,
The auxiliary shield body is an electromagnetic shield member formed integrally with the plurality of strands in the main shield body. The electromagnetic shielding member according to claim 2,
The elastic sheet material of the auxiliary shield body is formed in a cylindrical shape, and a plurality of the strands are assembled in a cylindrical shape by connecting the strands in parallel with a gap in the circumferential direction. Electromagnetic shield member. The electromagnetic shielding member according to claim 3,
The said elastic sheet material of the said auxiliary shield body is an electromagnetic shielding member which has the structure formed in the cylinder shape, when the two edge parts are connected. The electromagnetic shielding member according to any one of claims 2 to 4,
An electromagnetic shielding member in which at least a part of the entire area of the main shield body is embedded in the auxiliary shield body formed in a cylindrical shape. The electromagnetic shielding member according to claim 1,
The auxiliary shield body is formed in a spiral shape in a natural state, and can be elastically deformed into a shape in which the bending is extended, and the electromagnetic shield member that maintains the state of being wound around the main shield body by the elastic force . The electromagnetic shielding member according to claim 6,
The auxiliary shield body is further formed with a spiral member that is integrally formed with the elastic sheet material, is bent in a spiral shape in a natural state, and can be elastically deformed into a shape in which the bending is extended,
The auxiliary shield body is an electromagnetic shield member that maintains a state of being wound around the main shield body by the elastic force of the spiral member.

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