JP2016072551A - Electromagnetic shield member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic shield member including a first shield member and a second shield member of which electric connection is stable.SOLUTION: An electromagnetic shield member 100 includes: a first shield member 1 including a metallic cylindrical body 11; a second shield member 2; and a connection member 3 which is a cylindrical member for connecting the first shield member 1 and the second shield member 2 and includes protrusions 32 formed on a peripheral surface on the first shield member 1 side. The protrusions 32 are formed over the whole periphery in a peripheral direction of the connection member 3. The protrusions 32 of the connection member 3 press the second shield member 2 against the cylindrical body 11 of the first shield member 1, and in a state where the second shield member 2 exists between the protrusions 32 and the first shield member 1, the second shield member 2 is held and fixed between the first shield member 1 and the connection member 3.SELECTED DRAWING: Figure 1

Description

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

  A wire harness mounted on a vehicle such as an automobile may include an electric wire to be shielded and an electromagnetic shielding member that collectively covers the electric wire. The electromagnetic shield member surrounds the electric wire and shields electromagnetic noise.

  For example, Patent Document 1 discloses an electromagnetic shield member including a metal pipe (first shield member) and a flexible shield member (second shield member). In Patent Document 1, an example in which the second shield member is a braided wire is shown.

  Patent Document 1 discloses an annular fixture that is annularly fixed around the first shield member. In addition, a projection that abuts or bites into the first shield member is formed on the inner wall surface of the annular fixture.

JP 2007-280814 A

  By the way, in the example of patent document 1, the aspect by which three cone-shaped projection parts were formed in the inner wall surface of an annular fixture is shown. In the example shown in Patent Document 1, it is conceivable that this protrusion passes through a portion between the strands of the second shield member (braided wire), that is, a mesh, and its tip abuts on the first shield member. . In this case, there is a concern that both the first shield member and the second shield member are connected in an unstable state.

  An object of the present invention is to provide an electromagnetic shield member including a first shield member and a second shield member that are stable in electrical connection.

  The electromagnetic shield member according to the first aspect includes a first shield member including a metal cylinder, a second shield member that is a metal cylindrical member and is more flexible than the first shield member, and the first shield member. And a connecting member including a projecting portion formed on the peripheral surface on the first shielding member side, and the projecting portion of the connecting member is connected to the second shielding member. Formed over the entire circumference in the circumferential direction, the convex portion of the connecting member presses the second shield member against the cylindrical body of the first shield member, and between the convex portion and the first shield member In the state where the second shield member exists, the second shield member is sandwiched and fixed between the first shield member and the connection member.

  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 shield member according to the second aspect, the first shield member further includes a resin layer provided on the outer peripheral surface of the cylindrical body, and the connection member is provided inside the first shield member, The convex portion is formed on the outer peripheral surface of the connecting member, and the second shield member is fixed in contact with the convex portion and the inner peripheral surface of the cylindrical body.

  The electromagnetic shielding member according to the third aspect is an aspect of the electromagnetic shielding member according to the first aspect. In the electromagnetic shield member according to the third aspect, the first shield member further includes a resin layer provided on the outer peripheral surface of the cylindrical body, and the connection member is provided outside the first shield member, The convex portion capable of removing the resin layer of the first shield member is formed on an inner peripheral surface of the connection member, and the second shield member is formed of the convex portion and the convex of the connection member. The resin layer of the first shield member is removed by the portion and fixed in a state in contact with the outer peripheral surface of the cylindrical body exposed.

  The electromagnetic shielding member according to the fourth aspect is an aspect of the electromagnetic shielding member according to any one of the first aspect to the third aspect. In the electromagnetic shielding member which concerns on a 4th aspect, the said convex part of the said connection member is provided helically along the direction which goes to the other edge part from one edge part.

  Each said aspect WHEREIN: An electromagnetic shielding member is provided with the connection member containing the convex part formed in the surrounding surface at the side of a 1st shield member. And the 2nd shield member is pinched | interposed and fixed between the 1st shield member and the connection member in the state which the convex part of the connection member pressed the 2nd shield member against the cylinder of the 1st shield member. In this case, the second shield member is strongly pressed against the cylindrical body of the first shield member by the convex portion of the connection member. Moreover, the convex part of the connection member is formed over the perimeter in the circumferential direction of a connection member. Therefore, a wider area of the second shield member can be pressed against the cylindrical body of the first shield member. Thereby, the electromagnetic shield member in which the electrical connection between the first shield member and the second shield member is more stable can be obtained.

  In the second mode, since the second shield member is connected inside the first shield member, the size of the electromagnetic shield member can be further reduced, and the electromagnetic shield member can be downsized. . Moreover, since the connection member is connected inside, it is also possible to protect the electric wire in the edge part of a cylinder.

  In the third aspect, the convex portion of the connecting member removes the resin layer of the first shield member to expose the outer peripheral surface of the cylindrical body, and the second shield member is connected to the exposed outer peripheral surface of the cylindrical body. The For this reason, the hollow part of an electromagnetic shielding member can be enlarged, and it becomes possible to perform the operation | work which penetrates an electric wire through this hollow part more easily, or to insert more electric wires.

  Moreover, in the 4th aspect, since the convex part of a connection member is provided helically, it becomes possible to perform the operation | work which attaches this connection member to a 1st shield member more easily.

It is sectional drawing of the electromagnetic shielding member which concerns on 1st Embodiment. It is a side view of the connection member of the electromagnetic shielding member which concerns on 1st Embodiment. It is a partial exploded sectional view of the electromagnetic shielding member concerning a 1st embodiment. It is sectional drawing of the electromagnetic shielding member which concerns on 2nd Embodiment. It is a partial expanded sectional view of the electromagnetic shielding member which concerns on 2nd Embodiment. It is sectional drawing of the connection member of the electromagnetic shielding member which concerns on 2nd Embodiment. It is sectional drawing of the electromagnetic shielding member which concerns on 3rd Embodiment. It is a side view of the connection member of the electromagnetic shielding member which concerns on 3rd 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 100 according to the first embodiment will be described with reference to FIGS. The electromagnetic shield member 100 includes a first shield member 1, a second shield member 2, and a connection member 3. The electromagnetic shield member 100 is mounted on a vehicle such as an automobile. The electromagnetic shielding member 100 surrounds the periphery of the electric wire and shields electromagnetic noise. For example, the electric wire may be an insulated electric wire including a core wire whose main component is a metal such as copper or aluminum and an insulating coating covering the periphery of the core wire.

  FIG. 1 is a cross-sectional view of the electromagnetic shield member 100. FIG. 1 is a view showing a cross section in a plane along the longitudinal direction (axial direction) of the first shield member 1. FIG. 2 is a side view of the connection member 3 included in the electromagnetic shield member 100. FIG. 3 is a cross-sectional view showing a part of the method for manufacturing the electromagnetic shield member 100.

<Electromagnetic shield member: first shield member>
As shown in FIG. 1, in the electromagnetic shield member 100, the first shield member 1 includes a metal cylinder 11. In the present embodiment, the first shield member 1 further includes a resin layer 12 provided on the outer peripheral surface of the metal cylinder 11.

  For example, the cylinder 11 of the first shield member 1 may be a member capable of maintaining a certain shape. The cylindrical body 11 is considered to be a metal pipe whose main component is a metal such as aluminum or copper, for example. In the electromagnetic shield member 100, the second shield member 2 described later is a relatively flexible member. Therefore, it can be said that the cylindrical body 11 of the first shield member 1 is a member that is not easily deformed compared to the second shield member 2.

  In the present embodiment, the resin layer 12 is provided so as to cover the outer peripheral surface of the cylindrical body 11. It is conceivable that the resin layer 12 is made of an insulating member such as a synthetic resin. That is, it is conceivable that the resin layer 12 is constituted by a film-like insulating member that covers the outer peripheral surface of the cylindrical body 11.

  In the first shield member 1, the metal portion is exposed on the inner peripheral surface of the cylindrical body 11. That is, the resin layer 12 is not provided on the inner peripheral surface of the cylinder 11. In the present embodiment, a second shield member 2 described later is connected to the inner peripheral surface of the cylindrical body 11.

<Electromagnetic shield member: second shield member>
The second shield member 2 is a cylindrical metal member. The second shield member 2 is a member that is more flexible than the first shield member 1. In the present embodiment, the second shield member 2 is a braided wire formed by knitting a thin metal wire such as copper into a cylindrical shape. In addition, the case where the 2nd shield member 2 is a member formed in the cylinder shape in the state in which the metal wire was parallel with each other, etc. can be considered.

  In this embodiment, the 2nd shield member 2 is fixed with respect to the 1st shield member 1 with the connection member 3 mentioned later in the state which contact | connected the inner peripheral surface of the cylinder 11 of the 1st shield member 1. FIG. Thereby, the second shield member 2 is electrically and mechanically connected to the first shield member 1.

<Electromagnetic shield member: connecting member>
The connection member 3 is a cylindrical member that connects the first shield member 1 and the second shield member 2. In the electromagnetic shield member 100, the connection member 3 includes a convex portion 32 formed on the peripheral surface of the cylindrical portion 31 on the first shield member 1 side. In the present embodiment, the connection member 3 includes a cylindrical portion 31 that is a cylindrical portion and a convex portion 32 that is formed on the outer peripheral surface of the cylindrical portion 31. Moreover, the convex part 32 is formed over the perimeter in the circumferential direction of the connection member 3. And in the electromagnetic shielding member 100, the connection member 3 is a 2nd shield member in the state in which the 2nd shield member 2 existed between the convex part 32 of the connection member 3, and the cylinder 11 of the 1st shield member 1. 2 is held together with the first shield member 1. For example, it is conceivable that the second shield member 2 exists between the tip (head portion) of the convex portion 32 of the connection member 3 and the cylindrical body 11 of the first shield member 1.

  In the present embodiment, the connection member 3 is provided inside the first shield member 1. And the convex part 32 is formed in the outer peripheral surface of the connection member 3. As shown in FIG. That is, in this embodiment, the convex part 32 is formed in the outer peripheral surface of the cylindrical part 31 of the connection member 3. As shown in FIG. Therefore, in the present embodiment, the second shield member 2 is fixed to the first shield member 1 while being in contact with and sandwiched between the convex portion 32 of the connection member 3 and the inner peripheral surface of the cylindrical body 11. .

  In the present embodiment, the cylindrical portion 31 is a portion formed in a cylindrical shape in the connection member 3. An electric wire to be shielded is wired in the hollow portion of the cylindrical portion 31.

  In the present embodiment, the convex portion 32 is formed on the outer peripheral surface of the cylindrical portion 31. The second shield member 2 is pressed against the cylindrical body 11 of the first shield member 1 by the convex portion 32 of the connection member 3. In this state, the second shield member 2 is sandwiched and fixed between the first shield member 1 and the connection member 3. In the present embodiment, the convex portion 32 of the connection member 3 is provided in a spiral shape along the direction from one end of the connection member 3 to the other end. The direction from one end of the connecting member 3 to the other end is also the axial direction of the cylindrical portion 31 of the connecting member 3. The axial center direction of the cylindrical portion 31 of the connecting member 3 is orthogonal to the circumferential direction of the cylindrical portion 31 of the connecting member 3.

  Moreover, in this embodiment, the convex part 32 is formed in the area | region ranging from the one edge part in the axial direction of the cylindrical part 31 to the other edge part. That is, in this embodiment, the convex part 32 is formed in the whole outer peripheral surface of the cylindrical part 31 of the connection member 3. As shown in FIG. Further, the convex portion 32 provided in a spiral shape is formed in a continuous manner from the start point of one end portion in the axial direction of the cylindrical portion 31 to the end point of the other end portion. That is, in the present embodiment, the convex portion 32 of the connecting member 3 includes a portion protruding over the entire circumference of the cylindrical portion 31 in the circumferential direction. Accordingly, it is possible to efficiently perform the operation of screwing the connecting member 3 described later and press a wider area of the second shield member 2 against the cylindrical body 11 of the first shield member 1. In addition, the case where the convex part 32 is not formed in the whole area | region in the axial direction of the cylindrical part 31, ie, the case where it forms only in the one part area | region in the axial direction of the cylindrical part 31 is also considered.

  In the electromagnetic shield member 100, for example, the second shield member 2 is connected to the cylindrical body 11 of the first shield member 1 so that the convex portion 32 of the connection member 3 is recessed into the inner peripheral surface of the cylindrical body 11 of the first shield member 1. Press firmly against the inner surface. More specifically, the tip portion of the convex portion 32 of the connection member 3 abuts on the second shield member 2, and the second shield member 2 on the tip portion of the convex portion 32 is the tube of the first shield member 1. It is conceivable that it is pressed so as to sink into the body 11. In addition, the front-end | tip part of the convex part 32 of the connection member 3 is a part which protruded from the cylindrical part 31 in the connection member 3 to the outermost side.

  Further, in order to press the second shield member 2 relatively strongly against the cylindrical body 11 of the first shield member 1, the electromagnetic shield member 100 has a tip portion of the convex portion 32 when viewed from the axial direction of the connection member 3. A case where the size of the contour and the size of the contour formed by the inner peripheral surface of the cylindrical body 11 of the first shield member 1 are the same or large is conceivable. In the present embodiment, the second shield member 2 is a braided wire having flexibility. Therefore, in the present embodiment, the size of the contour obtained by adding the thickness of the second shield member 2 (the thickness of the braided wire) to the contour formed by the tip portion of the convex portion 32 is the inside of the cylindrical body 11 of the first shield member 1. The case where it is the same as the magnitude | size of the outline which a surrounding surface comprises, or the case where it is large is considered.

  Moreover, in this embodiment, the convex part 32 is formed in the shape which becomes thin gradually as it goes to a front-end | tip. More specifically, the convex portion 32 is formed in a shape that gradually decreases in size in the axial direction of the cylindrical portion 31 as it goes toward the tip.

  For example, it is conceivable that the tip of the convex portion 32 is formed in a rounded shape. In this case, damage to the second shield member 2 (braided wire) when the convex portion 32 contacts the second shield member 2 (braided wire) can be reduced, and electrical connection can be made better. it can. In addition, when the convex portion 32 is formed in a rectangular shape in a cross section along the axial direction of the cylindrical portion 31, or a trapezoid in which the dimension in the axial direction of the portion on the base side is smaller than the dimension in the axial direction of the tip portion It is also conceivable that they are formed. It is also conceivable that the tip of the convex portion 32 is sharp. That is, it is also conceivable that the convex portion 32 is formed so sharp that it does not damage the second shield member 2 (braided wire).

  Moreover, in the electromagnetic shielding member 100, it is possible that the convex part 32 is formed with the same pitch in the axial direction of the cylindrical part 31. FIG. It is also conceivable that the convex portions 32 are formed at different pitches in the axial direction of the cylindrical portion 31.

  In the electromagnetic shield member 100, the convex portion 32 of the connection member 3 strongly presses the second shield member 2 against the inner peripheral surface of the cylindrical body 11 of the first shield member 1, thereby the second shield member 2 and the first shield. The electrical resistance with the member 1 can be reduced.

  Further, the protrusion 32 formed on the outer peripheral surface of the cylindrical portion 31 of the connecting member 3 hits the inner peripheral surface of the cylindrical body 11 of the first shield member 1 via the second shield member 2, so that the frictional resistance is increased. It is considered that the connection state between the second shield member 2 and the first shield member 1 becomes difficult to be released.

  Further, in the present embodiment, the connecting member 3 can be inserted into the cylindrical body 11 of the first shield member 1 by the convex portion 32 formed in a spiral shape. Thereby, the insertion operation of the connection member 3 is simplified.

  Note that the connecting member 3 may be, for example, a metal member or a resin member. Further, since the second shield member 2 is pressed against the inner peripheral surface of the cylindrical body 11 of the first shield member 1, the connection member 3 is considered to be a relatively hard member as compared to the second shield member 2.

<Electromagnetic shield member>
The electromagnetic shield member 100 according to the present embodiment includes the connection member 3 including the convex portion 32 formed on the outer peripheral surface of the cylindrical portion 31. And in the state which the convex part 32 of the connection member 3 pressed the 2nd shield member 2 against the cylinder 11 of the 1st shield member 1, the 2nd shield member 2 is the 1st shield member 1 and the connection member 3. It is sandwiched and fixed. In this case, the second shield member 2 is strongly pressed against the inner peripheral surface of the cylindrical body 11 of the first shield member 1 by the convex portion 32 of the connection member 3. Further, the convex portion 32 of the connection member 3 is formed over the entire circumference in the circumferential direction of the connection member 3. Therefore, a wider area of the second shield member 2 can be pressed against the cylindrical body 11 of the first shield member 1. Thereby, the electromagnetic shield member 100 in which the electrical connection between the first shield member 1 and the second shield member 2 is more stable can be obtained.

  Moreover, in this embodiment, since the convex part 32 of the connection member 3 is formed over the perimeter in the circumferential direction of the connection member 3, the 2nd shield member 2 is more efficiently attached to the 1st shield member 1. It can be pressed against the cylinder 11. That is, in the example shown in Patent Document 1, the protrusion on the inner wall surface of the annular fixture passes through the portion between the strands of the second shield member (braided wire), that is, the mesh, and the tip is the first shield member. There is a concern that both the first shield member and the second shield member are connected in an unstable state. On the other hand, in this embodiment, since the convex part 32 of the connection member 3 is formed over the perimeter in the circumferential direction of the connection member 3, the convex part 32 is the mesh | network of the 2nd shield member 2 (braided wire). Regardless, more metal wire constituting the second shield member 2 (braided wire) is pressed against the cylindrical body 11 of the first shield member 1. For this reason, it becomes possible to connect both the first shield member 1 and the second shield member 2 in a stable electrical connection.

  Moreover, in the electromagnetic shielding member 100 of this embodiment, the connection work of the 1st shield member 1 and the 2nd shield member 2 can be performed, without removing the resin layer 12 of the 1st shield member 1. FIG. Therefore, the operation | work which removes the resin layer 12 of the 1st shield member 1 becomes unnecessary.

  Further, for example, in the example shown in Patent Document 1, a grommet or the like is covered by a caulking member that connects the first shield member and the second shield member at a connection portion between the first shield member and the second shield member. There is a concern that the contour shape of the member becomes an irregular shape. On the other hand, in the present embodiment, the second shield member 2 is connected to the first shield member 1 on the inner side of the first shield member 1, and even at the connection portion between the first shield member 1 and the second shield member 2, electromagnetic The shield member 100 has a circular shape. That is, the electromagnetic shield member 100 has a circular contour shape in a range from the first shield member 1 to the second shield member 2. Therefore, even when the electromagnetic shielding member 100 is covered with a cylindrical covering member such as a grommet for water stoppage, the covering member does not have an irregular shape. Therefore, when the electromagnetic shielding member 100 is covered with a covering member such as a grommet for water stopping, the covering member can be prevented from being deformed into an irregular shape, and the covering member can be contacted with the electromagnetic shielding member 100 without a gap. It becomes possible to install in the state. In this case, it is possible to improve the water stop performance of the electromagnetic shield member 100 including the covering member and to save the space required for the electromagnetic shield member 100.

  Moreover, in this embodiment, the connection operation | work with the 1st shield member 1 and the 2nd shield member 2 is performed by the method as shown, for example in FIG. In the example shown in FIG. 3, first, the end of the second shield member 2 is inserted into the first shield member 1, and the end of the second shield member 2 is placed inside the cylinder 11 of the first shield member 1. A state where a part exists is created.

  And the connection member 3 accommodated in the inside of the 2nd shield member 2 in the state in which the edge part of the 2nd shield member 2 exists in the inside of the cylinder 11 of the 1st shield member 1 is the 1st shield member 1 side. Approached. Note that the connecting member 3 is, for example, stored in the second shield member 2 in advance or from the end on the opposite side to the end of the second shield member 2 on the first shield member 1 side. It can be considered to be inserted into the member 2.

  The connection member 3 that moves inside the second shield member 2 toward the first shield member 1 eventually reaches the end of the first shield member 1 and is inserted into the cylinder 11 of the first shield member 1. The In the present embodiment, the convex portion 32 of the connection member 3 is provided in a spiral shape along the axial direction of the cylindrical portion 31 of the connection member 3. In this case, the connection member 3 is inserted into the cylindrical body 11 of the first shield member 1 while being rotated in the circumferential direction of the cylindrical portion 31, so that the connection member 3 to the first shield member 1 is inserted. Insertion work can be performed easily. And until the whole is accommodated in the inside of the cylinder 11 of the 1st shield member 1, the connection member 3 presses the 2nd shield member 2 against the inner peripheral surface of the cylinder 11 of the 1st shield member 1 strongly. Screwed. Thereby, the electromagnetic shielding member 100 containing the 1st shield member 1, the 2nd shield member 2, and the connection member 3 can be obtained. In the electromagnetic shield member 100, the connection state between the first shield member 1 and the second shield member 2 can be made stronger by the convex portion 32 of the connection member 3.

Second Embodiment
Next, the electromagnetic shielding member 200 according to the second embodiment will be described with reference to FIGS. In the present embodiment, the electromagnetic shield member 200 includes a connection member 3 </ b> A having a structure different from that of the connection member 3. FIG. 4 is a cross-sectional view of the electromagnetic shield member 200. FIG. 5 is an enlarged cross-sectional view of a connection portion between the connection member 3 </ b> A and the resin layer 12 of the first shield member 1. 4 and 5 are views showing a cross section in a plane along the longitudinal direction of the first shield member 1. FIG. 6 is a side view of the connection member 3 </ b> A included in the electromagnetic shield member 200. 4 to 6, the same constituent elements as those shown in FIGS. 1 to 3 are denoted by the same reference numerals. Hereinafter, differences of the present embodiment from the first embodiment will be described.

  In the present embodiment, the connection member 3 </ b> A is provided outside the first shield member 1. The connecting member 3A includes a cylindrical portion 31 and a convex portion 32A. In the present embodiment, as shown in FIG. 6, the convex portion 32A is formed on the inner peripheral surface of the connecting member 3A. That is, the convex portion 32 </ b> A is formed on the inner peripheral surface of the cylindrical portion 31 of the connecting member 3.

  In the present embodiment, the convex portion 32 </ b> A can remove the resin layer 12 of the first shield member 1. In the electromagnetic shield member 200 shown in FIG. 4, the convex portion 32 </ b> A of the connection member 3 </ b> A removes the resin layer 12 of the first shield member 1 and exposes the outer peripheral surface of the cylindrical body 11.

  In the electromagnetic shield member 200, the second shield member 2 is a cylinder in which the metal layer is exposed by removing the resin layer 12 of the first shield member 1 by the convex portion 32A of the connecting member 3A and the convex portion 32A of the connecting member 3. It is in contact with the outer peripheral surface of the body 11. And the 2nd shield member 2 is pinched | interposed into the convex part 32A of the connection member 3A, and the cylinder 11 which the metal part exposed, and is being fixed to the 1st shield member. In the electromagnetic shielding member 200, it is conceivable that the convex portion 32A of the connecting member 3A is formed sharply so that the resin layer 12 of the first shielding member 1 can be removed, for example.

  In the present embodiment, similarly to the first embodiment, the convex portion 32A is provided in a spiral shape along the axial direction of the tubular portion 31 of the connecting member 3A. In the present embodiment, for example, the first shield member 1 and the second shield member 2 are connected by the following method.

  First, the second shield member 2 is put on the end portion of the first shield member 1. At this time, the inner peripheral surface of the second shield member 2 is in contact with the resin layer 12 of the first shield member 1. Then, in a state where the second shield member 2 is put on the end portion of the first shield member 1, the connection member 3 </ b> A covering the periphery of the second shield member 2 is brought closer to the first shield member 1 side.

  The connection member 3 </ b> A that moves to the first shield member 1 side while surrounding the second shield member 2 eventually reaches the end of the first shield member 1 and is put on the first shield member 1. At this time, the convex portion 32 </ b> A of the connecting member 3 </ b> A that covers the end portion of the first shield member 1 bites into the resin layer 12 of the first shield member 1. The connecting member 3 </ b> A is moved from the end on the second shield member 2 side of the first shield member 1 toward the opposite end while rotating in the circumferential direction of the tubular portion 31. Hereinafter, the end on the second shield member 2 side of the first shield member 1 is referred to as a first end, and the end opposite to the first end is referred to as a second end.

  By moving the connecting member 3A toward the second end while rotating, the resin layer 12 where the convex portion 32A of the connecting member 3A has passed is removed. As a result, the cylinder 11 on the lower layer side of the resin layer 12 is exposed, and the inner peripheral surface of the second shield member 2 covering the periphery of the first shield member 1 at the location of the convex portion 32A is the exposed metal tube. It contacts the outer peripheral surface of the body 11. In this embodiment, the inner surface of the second shield member 2 covering the periphery of the first shield member 1 is in contact with the outer surface of the exposed metal cylinder 11 so that the first shield member 1 and the second shield member 2 are in contact with each other. The shield member 2 is electrically connected.

  4 and 5, the concave shape in which the resin layer 12 is removed by passing the convex portion 32A of the connecting member 3A through the resin layer 12 at the end of the first shield member 1. It is conceivable that this portion (hereinafter referred to as the recess 15) is formed. The concave portion 15 is formed in a mark where the convex portion 32A of the connecting member 3A in the resin layer 12 has passed. In the present embodiment, the convex portion 32A of the connecting member 3A is provided in a spiral shape. Therefore, it is conceivable that the recesses 15 are formed in the resin layer 12 at the same pitch as the spiral pitch of the protrusions 32A of the connection member 3A.

  In the present embodiment, the convex portion 32A of the connecting member 3A removes the resin layer 12 of the first shield member 1 to expose the outer peripheral surface of the cylindrical body 11, and the second shield is formed on the exposed outer peripheral surface of the cylindrical body 11. Member 2 is connected. For this reason, the hollow part of the electromagnetic shielding member 200 can be enlarged, and it becomes possible to perform the operation | work which inserts an electric wire in this hollow part more simply, or to insert more electric wires.

  Moreover, in this embodiment, the 2nd shield member 2 and the 1st shield member 1 are electrically connected by performing the operation | work which attaches the connection member 3A to the 1st shield member 1 by the convex part 32A of the connection member 3A. It is also possible to make it. That is, the mechanical connection and the electrical connection between the first shield member 1 and the second shield member 2 can be performed by one operation of attaching the connection member 3A.

  Further, by making the contour shape of the connecting member 3A circular, it is possible to improve the water stop performance of the electromagnetic shield member 200 having a covering member such as a grommet and to save the space required for the electromagnetic shield member 200. It is.

<Third Embodiment>
Next, the electromagnetic shielding member 300 according to the third embodiment will be described with reference to FIGS. In the present embodiment, the electromagnetic shield member 300 includes a connection member 3B having a structure different from that of the connection members 3 and 3A. FIG. 7 is a cross-sectional view of the electromagnetic shield member 300. FIG. 7 is a side view of the connection member 3 </ b> B included in the electromagnetic shield member 300. FIG. 8 is a view showing a cross section in a plane along the longitudinal direction of the first shield member 1. 7 and 8, the same components as those shown in FIGS. 1 to 6 are given the same reference numerals. Hereinafter, differences of the present embodiment from the first embodiment and the second embodiment will be described.

  As shown in FIGS. 5 and 6, in the present embodiment, the connection member 3 </ b> B included in the electromagnetic shield member 300 includes a cylindrical portion 31 and a plurality of convex portions 32 </ b> B. The convex portion 32 </ b> B in the connecting member 3 </ b> B is formed over the entire circumference along the circumferential direction of the tubular portion 31. That is, the connection member 3B includes a plurality of annular convex portions 32B. In the connecting member 3 </ b> B, the plurality of convex portions 32 </ b> B are arranged at intervals along the axial direction of the cylindrical portion 31.

  That is, in the present embodiment, unlike the connection member 3 having the convex portions 32 formed in a spiral shape, in the connection member 3B, the plurality of convex portions 32B are spaced along the axial direction of the cylindrical portion 31. It is formed in a corrugated form.

  In the present embodiment, for example, the connection member 3B is pushed into the hollow portion of the second shield member 2 provided inside the cylinder 11 of the first shield member 1. As a result, the second shield member 2 is deformed by the connecting member 3 </ b> B in a direction in which the hollow portion of the second shield member 2 expands and is pressed against the inner peripheral surface of the cylindrical body 11 of the first shield member 1. The connection member 3B is fixed to the first shield member 1 in a state where the second shield member 2 is pressed against the inner peripheral surface of the cylindrical body 11 of the first shield member 1. At this time, it is also conceivable that the apex portion of the convex portion 32B of the connecting member 3B is deformed. Also in this embodiment, the connection state between the first shield member 1 and the second shield member 2 can be made stronger by the convex portions 32B of the connection member 3B.

<Application example>
Also, the first shield member 1 is screwed into the first shield member 1 while rotating the connection member 3 together with the second shield member 2 in a state where the connection member 3 is previously provided inside the second shield member 2. The case where the connection work of the member 1 and the 2nd shield member 2 is performed is also considered.

  Moreover, the case where the 1st shield member 1 is the structure containing only the metal cylinder 11 is also considered. Also in this case, the inner peripheral surface of the second shield member 2 is strongly pressed against the outer peripheral surface of the cylindrical body 11 of the first shield member 1 by the convex portion 32. As a result, an electromagnetic shield member in which electrical connection between the first shield member 1 and the second shield member 2 is more stable can be obtained.

  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 configure by deforming or omitting a part.

DESCRIPTION OF SYMBOLS 1 1st shield member 100 Electromagnetic shield member 11 Cylindrical body 12 Resin layer 2 Second shield member 3 Connection member 32 Convex part

Claims (4)

A first shield member including a metal cylinder;
A second shield member that is a metal cylindrical member and is flexible compared to the first shield member;
A cylindrical member that connects the first shield member and the second shield member, and includes a connection member that includes a convex portion formed on the peripheral surface on the first shield member side,
The convex portion is formed over the entire circumference in the circumferential direction of the connection member,
The convex portion of the connecting member presses the second shield member against the cylindrical body of the first shield member, and the second shield member is present between the convex portion and the first shield member. The electromagnetic shield member, wherein the second shield member is sandwiched and fixed between the first shield member and the connection member. The electromagnetic shielding member according to claim 1,
The first shield member further includes a resin layer provided on the outer peripheral surface of the cylindrical body,
The connection member is provided on the inner side of the first shield member, and the convex portion is formed on an outer peripheral surface of the connection member;
The electromagnetic shield member, wherein the second shield member is fixed in contact with the convex portion and the inner peripheral surface of the cylindrical body. The electromagnetic shielding member according to claim 1,
The first shield member further includes a resin layer provided on the outer peripheral surface of the cylindrical body,
The connecting member is provided outside the first shield member, and the convex portion capable of removing the resin layer of the first shield member is formed on an inner peripheral surface of the connecting member,
The second shield member is fixed in contact with the outer peripheral surface of the cylindrical body exposed by removing the resin layer of the first shield member by the convex portion and the convex portion of the connection member. Electromagnetic shield member. It is an electromagnetic shielding member given in any 1 paragraph of Claims 1-3,
The said shielding part of the said connection member is an electromagnetic shielding member provided in the spiral form along the direction which goes to the other edge part from one edge part.

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