Patent Description:
Conventionally, an electromagnetic shield pipe such as a metallic pipe or a composite pipe composed of a metallic layer and a resin layer is used as a protective pipe of a cable. Influence on the outside caused by noise that is generated from a cable inside or influence on the cable inside caused by noise on the outside can be suppressed by storing the cable in the electromagnetic shield pipe.

Herein, for example, in an automobile, in some cases, a plurality of cables such as a high-voltage electric wire for connecting a high-voltage battery and an inverter and a low-voltage electric wire for connecting a low-voltage battery and a relay box is stored in one electromagnetic shield pipe. In this case, generally, noise from the high-voltage electric wire is shielded so as not to be transmitted to the low-voltage electric wire in the interior of the electromagnetic shield pipe. As this specific example, an example in which the low-voltage electric wire is inserted into a shielding member (e.g., braided wire) is given.

In contrast, the high-voltage electric wire and the low-voltage electric wire that are exposed from the end portion of the electromagnetic shield pipe are respectively inserted into the shielding member (e.g., braided wire) so as not to come under the influence of noise. This shielding member is connected to the electromagnetic shield pipe in a conductive manner and constitutes an electromagnetic shield structure.

As this electromagnetic shield structure, for example, there is a method in which a braided wire into which the high-voltage electric wire is inserted and a braided wire into which the low-voltage electric wire is inserted are overlapped, and crimped with a crimp member such as a ring on a metallic portion (conductive portion) such as an end of an electromagnetic shield pipe (Patent Document <NUM>).

Patent document <NUM> discloses an electromagnetic shield structure according to the preamble of claim <NUM>.

Patent document <NUM> discloses a cable shielding which has two halves such that there is no overlap over the shielding layers.

However, in the electromagnetic shield structure of Patent Document <NUM>, on a connection portion between the braided wire and the electromagnetic shield pipe, there is an overlapping portion of the braided wire into which the high-voltage electric wire is inserted and the braided wire into which the low-voltage electric wire is inserted, and sections having a thickness different from the thickness of the overlapping portion occur on both sides of the overlapping portion. Thus, there are concerns about a holding strength of a crimping body might be reduced in a step of a thickness-varying portion of the braided wire which is the crimping body.

For example, holding strength on both sides of the overlapping portion of the braided wire is reduced due to heat cycle, repetitive bending, or tensile force, which might cause the shift or coming off of the braided wire, the coming off of the ring, and the like. Thus, there are concerns about stability regarding an energized state between the braided wire and the shield pipe or the holding strength of a crimp.

The present invention has been made in view of these problems, and it is an object of the present invention to provide an electromagnetic shield structure capable of securing a stable energizing state between a flexible shield member and an electromagnetic shield pipe and maintaining the holding strength of the flexible shield member for the long term.

In order to achieve the aforementioned object, the present invention provides an electromagnetic shield structure according to claim <NUM> and a wire harness according to claim <NUM>.

According to the present invention, an electromagnetic shield structure that is capable of securing a stable energizing state between the flexible shield member and the electromagnetic shield pipe and maintaining the holding strength of the flexible shield member for the long term, can be provided.

Hereinafter, an electromagnetic shield pipe <NUM> according to an.

Note that any material may be used for the metal layer <NUM> as long as the
shield effect can be obtained, and for example, the metal layer <NUM> may be made of aluminum (including an aluminum alloy).

The outer layer <NUM> of the electromagnetic shield pipe <NUM> is peeled off by a predetermined length from an end portion. That is, the metal layer <NUM> is exposed only by a predetermined range on the end portion of the electromagnetic shield pipe <NUM>. The exposed metal layer <NUM> serves as a connection portion connected to a cylindrical flexible shield member described later.

A cable 9a being a first cable and a cable 9b being a second cable are inserted into the electromagnetic shield pipe <NUM> and exposed from the end portion of the electromagnetic shield pipe <NUM>. That is, a plurality of cables is inserted into the interior of the electromagnetic shield pipe <NUM>. Note that the cable 9a is, for example, a high-voltage cable, and the cable 9b is, for example, a low-voltage cable. Note that in the interior of the electromagnetic shield pipe <NUM>, for example, the cable 9b is inserted into the cylindrical flexible shield member (not illustrated). As the cylindrical flexible shield member, a cylindrical braided wire in which a plated copper wire is braided is preferably used, and in the description below, an explanation is given by exemplifying a cylindrical braided wire as the cylindrical flexible shield member. Needless to say, the cylindrical flexible shield member is not limited to the cylindrical braided wire.

<FIG> is a side view of the electromagnetic shield structure <NUM> provided on the electromagnetic shield pipe <NUM>. The electromagnetic shield structure <NUM> includes the electromagnetic shield pipe <NUM>, the cables 9a and 9b, and braided wires 11a and 11b. The cylindrical braided wire 11a that is a first cylindrical flexible shield member covers the cable 9a exposed from the end portion of the electromagnetic shield pipe <NUM>. The cylindrical braided wire 11b that is a second cylindrical flexible shield member covers the cable 9b exposed from the end portion of the electromagnetic shield pipe <NUM>. Note that terminals (not illustrated) are connected to the end portions of the plurality of cables 9a and 9b, and used as a wire harness <NUM>.

<FIG> is a plan view of the end portion of the braided wire 11b that covers the cable 9b and a view viewed from the direction of an arrow B of <FIG> is a side view of the end portion of the braided wire 11b that covers the cable 9b and a view viewed from the direction of an arrow A of <FIG>. Note that the braided wire 11a for the cable 9a has similar form, and thus the illustration thereof will be omitted.

The cylindrical shape of the end portions (the end portions on the electromagnetic shield pipe <NUM> side) of the braided wires 11a and 11b is loosened and expanded. That is, the end portions of the braided wires 11a and 11b are formed in a sheet-like shape. A sheet-like portion of the end portion of the braided wire 11a is a sheet-like portion 15a. In addition, a sheet-like portion of the end portion of the braided wire 11b is a sheet-like portion 15b.

The sheet-like portion 15a of the end portion of the braided wire 11a is crimped by a crimp member <NUM> on an exposed portion of the metal layer <NUM> of the end portion of the electromagnetic shield pipe <NUM>. Similarly, the sheet-like portion 15b of the end portion of the braided wire 11b is crimped by the same crimp member <NUM> on the exposed portion of the metal layer <NUM> of the end portion of the electromagnetic shield pipe <NUM>. That is, the braided wire 11a and the braided wire 11b are fixed with the crimp member <NUM> on the outer circumference of the electromagnetic shield pipe <NUM> at the same position in the longitudinal direction of the electromagnetic shield pipe <NUM>.

<FIG> is a cross-sectional view of a portion perpendicular to the longitudinal direction of the electromagnetic shield pipe <NUM> where the crimp member <NUM> is disposed. The braided wire 11a (the sheet-like portion 15a) and the braided wire 11b (the sheet-like portion 15b) are fixed with the crimp member <NUM> at different positions in the circumferential direction on the cross section perpendicular to the longitudinal direction of the electromagnetic shield pipe <NUM>. In the example illustrated, the braided wire 11a is fixed in a substantially semicircle on a lower side in the circumferential direction of the electromagnetic shield pipe <NUM>, and the braided wire 11b is fixed in another substantially semicircle (upper side in the diagram) in the circumferential direction of the electromagnetic shield pipe <NUM>.

Note that, as illustrated in <FIG>, each of the sheet-like portion 15a of the braided wire 11a and the sheet-like portion 15b of the braided wire 11b is not required to be fixed in a substantially semicircle in the circumferential direction of the electromagnetic shield pipe <NUM>. For example, when the circumferential length of the braided wire 11a is greater than the circumferential length of the braided wire 11b, the width of the sheet-like portion 15a may be wider than the width of the sheet-like portion 15b.

As described above, the cylindrical end portions of the braided wires 11a and 11b are loosened, and each of the sheet-like portions 15a and 15b is formed on the end portion. The sheet-like portions 15a and 15b of the end portions of the braided wires 11a and 11b are disposed at different positions in the circumferential direction of the electromagnetic shield pipe <NUM> and fixed on the metal layer <NUM> of the electromagnetic shield pipe <NUM> with the crimp member <NUM>. Thus, in the cross section perpendicular to the longitudinal direction of the electromagnetic shield pipe <NUM>, the braided wires 11a and 11b in a portion crimped by the crimp member <NUM> are fixed without being overlapped with each other in the circumferential direction of the electromagnetic shield pipe <NUM>.

That is, each of the plurality of braided wires 11a and 11b is fixed with the crimp member <NUM> on the outer circumference of the electromagnetic shield pipe <NUM>. In this case, the entire outer circumferential surface of each of the plurality of braided wires 11a and 11b is pressed by the crimp member <NUM> from the outer circumferential side, in the portion where the crimp member <NUM> is disposed on the cross section perpendicular to the longitudinal direction of the electromagnetic shield pipe <NUM>. That is, the portion where the crimp member <NUM> is disposed in the longitudinal direction of the electromagnetic shield pipe <NUM> serves as a crimp portion where the braided wires 11a and 11b are pressed from the outer circumference.

Note that "each of the entire outer circumferential surfaces is pressed by the crimp member <NUM> from the outer circumferential side" means that the entire outer circumferential surfaces of all the braided wires 11a and 11b are directly or indirectly pressed by the crimp member <NUM> from the outer circumferential side. For example, when the braided wires 11a and 11b are overlapped with each other, and a step occurs in this part in the circumferential direction, a section to which pressing force generated by tightening by the crimp member <NUM> from the outer circumferential side is not transmitted occurs in a part of any of the braided wires 11a and 11b on both sides of the step. In the present invention, the section to which this pressing force is not transmitted does not occur. That is, in the present invention, no gap occurs between the part of the outer circumferential surface of the braided wires 11a and 11b and the crimp member <NUM> disposed on the outer circumferential side of the braided wires 11a and 11b (or another member disposed between the crimp member <NUM> and each braided <NUM> wire). Thus, the entire outer circumferential surface of the braided wires 11a and 11b is adhered to members disposed on the outer circumferential side of the braided wires 11a and 11b. Note that this "gap" does not include a minuscule gap caused by depressions and recesses on the outer surface of the braided wires 11a and 11b between the braided wires and the crimp member <NUM> or the like. Note that, considering that the pressing force from the outer circumferential side is appropriately transmitted to each of the braided wires 11a and 11b in the case when each of the braided wires 11a and 11b is crimped by the crimp member <NUM>, it is preferable that the thicknesses of the sheet-like portions 15a and 15b in the portion where the crimp member <NUM> is disposed are substantially equal.

Note that the number of cables inserted into the electromagnetic shield pipe <NUM> is not limited to two. For example, as illustrated in <FIG>, the cables 9a and 9b may be not one, but may be a plurality. Even in this case, the cables 9a and 9b exposed from the electromagnetic shield pipe <NUM> are respectively covered with the braided wires 11a and 11b and, the braided wires 11a and 11b are crimped at different positions in the circumferential direction.

In this case, the plurality of cables may be inserted into one braided wire, or different braided wire may be used for each cable. Even in this case, respective braided wires are disposed not to be overlapped with each other in a crimp portion. For example, the cable 9a is a high-voltage system cable, and the cable 9b is a low-voltage system cable, and when cables are two systems, one system cable may be inserted into one braided wire. Note that, in many cases, both the number of high-voltage system cables and the number of low-voltage system cables are normally two or more. Thus, the high-voltage system cables and the low-voltage system cables are inserted into the braided wire for each system, thereby achieving shielding between the high-voltage system cables and the low-voltage system cables, between the electromagnetic shield pipe <NUM> and a connector.

In addition, the cables inserted into the electromagnetic shield pipe <NUM> are not limited to the two systems of the cables 9a and 9b. For example, when the cables inserted into the electromagnetic shield pipe <NUM> are three or more systems, or when a three-phase alternating current wire is provided, three or more braided wires may be used, and the sheet-like portions of the end portions of respective braided wires are only required to be disposed in such a manner so as not to be overlapped with each other at different positions in the circumferential direction of the electromagnetic shield pipe <NUM>.

For example, as illustrated in <FIG>, when three cables 9a, 9b and 9c are inserted into the electromagnetic shield pipe <NUM>, the cables 9a, 9b and 9c are covered with braided wires 11a, 11b, and 11c, respectively, and the braided wires 11a, 11b, and 11c are fixed at different positions in the circumferential direction. In this case, sheet-like portions 15a, 15b, and 15c are formed at respective end portions of the cylindrical braided wires 11a, 11b, and 11c, and the respective sheet-like portions 15a, 15b, and 15c are fixed on the metal layer <NUM> of the electromagnetic shield pipe <NUM> at different positions in the circumferential direction of the electromagnetic shield pipe <NUM>.

In this case, as illustrated in <FIG>, the circumferential length of the sheet-like portions 15a, 15b, and 15c (the braided wires 11a, 11b, and 11c) may be substantially equally divided and disposed in such a manner so as to be one third of the length of the circumferential direction. Alternatively, as illustrated in <FIG>, the sheet-like portions 15a, 15b, and 15c (the braided wires 11a, 11b, and 11c) may be disposed in such a manner that the lengths of the circumferential direction are different from each other. In any case, on the cross section perpendicular to the longitudinal direction of the electromagnetic shield pipe <NUM>, the entire outer circumferential surface of each of the braided wires 11a, 11b, and 11c is pressed by the crimp member <NUM> from the outer circumferential side. Note that in the description below, an explanation is given as to a case where two cables 9a and 9b are included, but in other embodiments, three or more cables may be included. In addition, considering that the pressing force from the outer circumferential side is appropriately transmitted to each of the braided wire 11a, 11b, and 11c in the case when each of the braided wire 11a, 11b, and 11c is tighten by the crimp member <NUM>, it is preferable that the thicknesses of the sheet-like portions 15a, 15b, and 15c in the portion where the crimp member <NUM> is disposed are substantially equal.

Next, a manufacturing method of the electromagnetic shield structure <NUM> will be described. First, the metal layer <NUM> of the end portion of the electromagnetic shield pipe <NUM> is exposed. In addition, the cables 9a and 9b are inserted into the electromagnetic shield pipe <NUM>. Note that, in this case, a braided wire may be disposed on the outer circumference of the cable 9a or the cable 9b in the interior of the electromagnetic shield pipe <NUM>.

Subsequently, the cable 9a exposed from the electromagnetic shield pipe <NUM> is covered with the braided wire 11a. In this case, the cylindrical portion of the end portion of the braided wire 11a (on the electromagnetic shield pipe <NUM> side) is loosened, and the sheet-like portion 15a having a predetermined length is formed. Similarly, the cable 9b exposed from the electromagnetic shield pipe <NUM> is covered with the braided wire 11b. In this case, the cylindrical portion of the end portion of the braided wire 11b (on the electromagnetic shield pipe <NUM> side) is loosened, and the sheet-like portion 15b having a predetermined length is formed.

Subsequently, the sheet-like portions 15a and 15b of the end portions of the braided wires 11a and 11b are disposed on the outer circumference of the metal layer <NUM>. In this case, the sheet-like portions 15a and 15b are disposed at different positions in the circumferential direction of the electromagnetic shield pipe <NUM> so as not to be overlapped with each other. In this state, the braided wires 11a and 11b are crimped and fixed with the crimp member <NUM> on the electromagnetic shield pipe <NUM>. Note that the end portion (crimp portion) of the electromagnetic shield pipe <NUM> is covered with a rubber member or the like as appropriate. As described above, the electromagnetic shield structure <NUM> is formed.

Hereinbefore, according to the First Embodiment, the braided wires 11a and 11b are crimped without being overlapped with each other at different positions in the circumferential direction of the electromagnetic shield pipe <NUM> in the crimp portion. Thus, there is no change in thickness in the crimp portion due to the partial overlapping of the braided wires 11a and 11b. Consequently, in the portion where the crimp member <NUM> is disposed, the entire outer circumferential surface of each of the braided wires 11a and 11b is pressed by the crimp member <NUM> from the outer circumferential side, and the stable holding strength by the crimp member <NUM> can be secured.

In addition, the braided wires 11a and 11b are respectively disposed in substantially semicircles in the circumferential direction of the electromagnetic shield pipe <NUM>, thereby respectively securing a sufficient contact area.

Next, a Second Embodiment not belonging to the present invention will be described. <FIG> are views
illustrating processes for forming an electromagnetic shield structure according to the Second Embodiment, and <FIG> is a side view, and <FIG> is a plan view. Note that, in the description below, constituent elements which have the same effect will be assigned the same reference numerals as in <FIG> and other drawings, and redundant descriptions of those constituent elements will be omitted.

In the present embodiment, first, the cable 9a exposed from the electromagnetic shield pipe <NUM> is inserted into the braided wire 11a. The end portion of the braided wire 11a covers the end portion (the metal layer <NUM>) of the electromagnetic shield pipe <NUM> while being formed in a cylindrical shape. Thus, in the present embodiment, which is different from the embodiment described above, it is not required to form the sheet-like portion 15a in the end portion of the braided wire 11a.

Note that the stitches of the braided wire 11a can be easily expanded, so that the diameter of the cylinder can be easily increased while the cylindrical shape is maintained. Thus, even when the braided wire 11a in accordance with the size of the cable 9a is used, the end portion of the braided wire 11a can be expanded to cover the outer circumference of the electromagnetic shield pipe <NUM>.

The holes 17a and <NUM> are formed in part of the braided wire 11a. Note that the hole 17a and the hole <NUM> are formed in the substantially same direction as the circumferential direction of the braided wire 11a. The holes 17a and <NUM> are formed by expanding the metallic elemental wires of the braided wire 11a to <NUM> both sides. The hole 17a is formed on the base portion side of the braided wire 11a with respect to a portion that covers the electromagnetic shield pipe <NUM>. The hole 17a is a portion penetrated by the cable 9b. Thus, when the cable 9a is inserted from the end portion of the braided wire 11a, the cable 9b is also simultaneously inserted into the braided wire 11a, and the cable 9b is taken out from the hole 17a to the outside.

The hole <NUM> is formed on the end portion side of the braided wire 11a with respect to the hole 17a. That is, the hole <NUM> is formed in a portion of the braided wire 11a, the portion that covers the electromagnetic shield pipe <NUM>. More specifically, as illustrated, the braided wire 11a covers the end portion of the electromagnetic shield pipe <NUM> in such a manner so that the hole <NUM> is positioned at the metal layer <NUM>. Note that the hole 17a and the hole <NUM> may communicate with each other.

<FIG> and <FIG> are views illustrating a state where the cable 9b is further covered with the braided wire 11b, and <FIG> is a side view, and <FIG> is a plan view. The sheet-like portion 15b is formed in the end portion of the braided wire 11b. That is, the cylindrical braided wire 11b is disposed on the cable 9b exposed from the braided wire 11a, and the sheet-like portion 15b is disposed so as to be overlapped with the braided wire 11a.

In this case, part of the sheet-like portion 15b is overlapped at a position of the hole <NUM> of the braided wire 11a. Thus, a part of the sheet-like portion 15b is disposed so as to cover the metal layer <NUM> exposed from the hole <NUM>. In this case, the width of the braided wire 11b is narrower that the width of the hole <NUM>. This prevents the braided wire 11b from protruding from the hole <NUM> and from being overlapped with the braided wire 11a in the circumferential direction of the hole <NUM>.

Further, <FIG> is a view illustrating an electromagnetic shield structure 1a in which the braided wires 11a and 11b are fixed with the crimp member <NUM>, and <FIG> is a cross-sectional view of a portion where the crimp member <NUM> is disposed. As illustrated, the braided wires 11a and 11b are fixed with the crimp member <NUM> on the electromagnetic shield pipe <NUM> in the portion where the crimp member <NUM> is disposed, corresponding to the hole <NUM>.

As described above, the end portion of the braided wire 11a covers the outer circumference of the electromagnetic shield pipe <NUM> while being in a cylindrical shape. In addition, the hole <NUM> is provided in part of the braided wire 11a positioned on the outer circumference of the electromagnetic shield pipe <NUM>, and the sheet-like portion 15b of the end portion of the braided wire <NUM>1b covers the position of the hole <NUM>. Further, the braided wires 11a and 11b are fixed with the crimp member <NUM> on the electromagnetic shield pipe <NUM> in a portion in the circumferential direction corresponding to the hole <NUM>. This prevents the braided wires 11a and 11b from being partially overlapped with the outer circumference of the electromagnetic shield pipe <NUM> in the crimp portion.

According to the Second Embodiment, the same effect as that of the First Embodiment can be achieved. That is, by removing the partial overlapping of the braided wires 11a and 11b in the crimp portion, the entire outer circumferential surface of each of the braided wires 11a and 11b is pressed by the crimp member <NUM> from the outer circumferential side, and the stability of holding strength or the stability of an energized state can be obtained.

In addition, the hole <NUM> is provided in the braided wire 11a, which makes it unnecessary to loosen the end portion of the braided wire 11a and form the sheet-like portion 15a. Note that, even in this case, the braided wires 11a and <NUM>1b can be appropriately disposed by adjusting the size of the hole <NUM> in such a manner as to cover each of substantially semicircles of the electromagnetic shield pipe <NUM>. Note that considering that the pressing force from the outer circumferential side is appropriately transmitted to each of the braided wires 11a and 11b in the case where each of the braided wires 11a and 11b is tightened by the crimp member <NUM>, it is preferable that the thickness of the braided wire 11a and the thickness of the sheet-like portion 15b in the portion where the crimp member <NUM> is disposed are substantially equal.

Next, a Third Embodiment not belonging to the present invention will be described. <FIG> is a side view illustrating an electromagnetic shield pipe <NUM>, and <FIG> is a side view illustrating an electromagnetic shield structure 1b according to the Third Embodiment. Note that <FIG> is a perspective view of the braided wires 11a and <NUM>1b, and the illustration of cables is omitted.

In the present embodiment, the outer layer <NUM> in the vicinity of the end portion of the electromagnetic shield pipe <NUM> is not entirely removed, but the outer layer <NUM> remains in an annular shape in part of the tip end portion. That is, the exposed portion of the metal layer <NUM> is caught by the outer layers <NUM> and formed in an annular shape.

As illustrated in <FIG>, the braided wires 11a and 11b are crimped by the crimp member <NUM> on the metal layer <NUM> in such a manner that the braided wires 11a and 11b are not overlapped with each other. Thus, the braided wires 11a and 11b steadily comes in contact with the metal layer <NUM>, which leads to electrical conduction. Note that the arrangement of the braided wires 11a and 11b can have any form as long as the partial overlapping is eliminated.

In this case, the annular outer layer <NUM> on the tip end side is positioned on the tip end side with respect to a crimping position of the crimp member <NUM>. The outer layer <NUM> has a larger outer diameter than that of the exposed portion of the metal layer <NUM>. Thus, a large diameter portion formed by the annular outer layer <NUM> is provided on the tip end side of the crimping position of the crimp member <NUM> with respect to the electromagnetic shield pipe <NUM>. Thus, even when the braided wires 11a and 11b are pulled, and the crimp member <NUM> is shifted to the tip end side, the movement of the crimp member <NUM> is regulated by the outer layer <NUM>. Consequently, the crimp member <NUM> can be prevented from coming off from the electromagnetic shield pipe <NUM>.

According to the Third Embodiment, the same effect as that of the First Embodiment can be achieved. That is, by removing the partial overlapping of the braided wires 11a and 11b in the portion where the crimp member <NUM> is disposed, the entire outer circumferential surface of each of the braided wires 11a and 11b is pressed by the crimp member <NUM> from the outer circumferential side, and the stability of holding strength or the stability of an energized state can be obtained. Note that, considering that the pressing force from the outer circumferential side is appropriately transmitted to each of the braided wires 11a and 11b in the case where each of the braided wires 11a and 11b is tighten by the crimp member <NUM>, it is preferable that the thicknesses of the sheet-like portions 15a and 15b in the portion where the crimp member <NUM> is disposed are substantially equal.

In addition, the outer layer <NUM> provided in an annular form functions as a stopper for preventing the crimp member <NUM> from coming off, so that the outer layer <NUM> can prevent the crimp member <NUM> from coming off from the electromagnetic shield pipe <NUM>. Note that, in place of the outer layer <NUM>, another member such as resin may be adhered to the outer circumferential portion of the metal layer <NUM> in an annular form, thereby forming a large diameter portion on the tip end side of the crimping position.

Next, a Fourth Embodiment will be described. <FIG> and <FIG> are views illustrating processes for forming an electromagnetic shield structure according to the Fourth Embodiment, and <FIG> is a side view, and <FIG> is a plan view.

In the Fourth Embodiment, as is the case with the Second Embodiment, first, the cable 9a exposed from the electromagnetic shield pipe <NUM> is inserted into the braided wire 11a. Note that, as is the case with the Third Embodiment, the outer layer <NUM> may be provided on the tip end portion of the electromagnetic shield pipe <NUM>. The end portion of the braided wire 11a covers the end portion (the metal layer <NUM>) of the electromagnetic shield pipe <NUM> while being in a cylindrical shape.

The hole 17a is formed in part of the braided wire 11a. As described above, the hole 17a is a portion penetrated by the cable 9b. Thus, when the cable 9a is inserted into the braided wire 11a, the cable 9b is also inserted into the braided wire 11a and taken out from the hole 17a to the outside. Note that <NUM> the hole 17a may be formed by opening the cylindrical shape of the braided wire 11a.

Further, <FIG> are views illustrating a state where the cable 9b is covered with the braided wire 11b, and <FIG> is a side view, and <FIG> is a plan view. The sheet-like portion 15b is not formed at the end portion of the braided wire 11b which is in a cylindrical shape. A hole 17b penetrated by the braided wire 11a (the cable 9a) is formed in the braided wire 11b. Note that the hole 17b may be formed by opening the cylindrical shape of the braided wire 11b.

In this case, first, both the braided wire 11a (the cable 9a) and the cable 9b are inserted from the end portion of the braided wire 11b, and only the braided wire 11a (the cable 9a) is taken out from the hole 17b to the outside of the braided wire 11b, and the cable 9b may be inserted into the braided wire <NUM>1b as it is.

The end portion of the braided wire 11b covers the end portion of the electromagnetic shield pipe <NUM> together with the braided wire 11a. That is, on the outer circumference of the metal layer <NUM> of the electromagnetic shield pipe <NUM>, the braided wire 11a is disposed across the entire circumference, and on the outer circumference of the braided wire 11a, the braided wire 11b is disposed across substantially the entire circumference.

Further, <FIG> is a view illustrating an electromagnetic shield structure 1c in which the braided wires 11a and 11b are fixed with the crimp member <NUM>, and <FIG> is a cross-sectional view of the crimp portion. As illustrated, on the metal layer <NUM>, the braided wires 11a and 11b are fixed with the crimp member <NUM> on the electromagnetic shield pipe <NUM>.

As described above, the end portions of the braided wires 11a and 11b cover the outer circumference of the electromagnetic shield pipe <NUM> while being in a cylindrical shape. In this case, the cylindrical braided wires 11a and 11b are disposed across the entire circumference of the electromagnetic shield pipe <NUM>, so that the braided wires 11a and <NUM>1b are overlapped with each other across the entire outer circumference of the electromagnetic shield pipe <NUM> in the crimp portion. That is, the overlapping portion of the braided wires 11a and 11b is not partially formed in the circumferential direction of the electromagnetic shield pipe <NUM>, but the braided wires 11a and 11b are overlapped with each other across the entire circumference. Thus, there is no change in the thickness of the braided wires in the crimp portion.

According to the Fourth Embodiment, the same effect as that of the First Embodiment can be achieved. That is, a step due to the partial overlapping of the braided wires 11a and 11b is not formed in the crimp portion. Thus, in the portion where the crimp member <NUM> is disposed, the entire outer circumferential surface of the braided wire 11b is pressed by the crimp member <NUM> from the outer circumferential side, and the entire outer circumferential surface of the braided wire 11a is indirectly pressed by the crimp member <NUM> via the braided wire 11a from the outer circumferential side, so that the stability of holding strength or the stability of an energized state can be obtained. Note that, considering that the pressing force from the outer circumferential side is appropriately transmitted to each of the braided wires 11a and 11b in the case <NUM> where each of the braided wires 11a and 11b is tighten by the crimp member <NUM>, it is preferable that the thicknesses of the braided wires 11a and 11b in the portion where the crimp member <NUM> is disposed are not substantially changed in the respective circumferential directions.

Thus, in the present invention, both the braided wires 11a and 11b are overlapped with each other across the entire circumference, so that change in the thicknesses of the braided wires can be prevented in the crimp portion. Consequently, an influence caused by a step portion due to the partial overlapping of the braided wires is suppressed.

Next, a Fifth Embodiment not belonging to the present invention will be described. <FIG> is a side view illustrating an electromagnetic shield structure 1d provided on the electromagnetic shield pipe <NUM>, and <FIG> is a plan view. The electromagnetic shield structure 1d includes the electromagnetic shield pipe <NUM>, the cables 9a and 9b, the braided wires 11a and 11b, crimp members 13a and 13b, and the like.

The end portion of the braided wire 11a covers the outer circumference of the metal layer <NUM> of the end portion of the electromagnetic shield pipe <NUM> while being in a cylindrical shape. The braided wire 11a is fixed with the crimp member 13a on the outer circumference of the electromagnetic shield pipe <NUM>. In contrast, the end portion of the braided wire <NUM>1b is disposed on the outer circumference of the braided wire 11a and the crimp member 13a.

The sheet-like portion 15b of the end portion of the braided wire <NUM>1b is disposed on the base portion side with respect to the braided wire 11a and crimped by the crimp member 13b on the exposed portion of the metal layer <NUM> of the end portion of the electromagnetic shield pipe <NUM>. That is, the braided wire 11a and the braided wire 11b are fixed with the crimp members 13a and 13b on the outer circumference of the electromagnetic shield pipe <NUM> at different positions in the longitudinal direction of the electromagnetic shield pipe <NUM>. In the example illustrated, the braided wire 11a is fixed with the crimp member 13a on the end portion side of the electromagnetic shield pipe <NUM>, and the braided Wire 11b is fixed with the crimp member 13b through the outer circumference of the crimp member 13a on the base portion side of the electromagnetic shield pipe <NUM>.

<FIG> is a cross-sectional view taken along line C-C of <FIG>, and <FIG> is a cross-sectional view taken along line D-D of <FIG>. On the cross section perpendicular to the longitudinal direction of the electromagnetic shield pipe <NUM>, the braided wire 11a is crimped and fixed with the crimp member 13a. In the example illustrated, the braided wire 11a is fixed across the entire circumference in the circumferential direction of the electromagnetic shield pipe <NUM>. In this case, a gap is formed between the braided wire 11a and the outer layer <NUM>. That is, the metal layer <NUM> is exposed on the tip end side of the braided wire 11a. In addition, a head portion <NUM> is provided on the crimp members 13a and 13b. The head portion <NUM> is a protruding portion that protrudes to the outside on the crimp members 13a and 13b. The protruding portion has a linear, bent, or folded shape, for example. Note that, as for the crimp members 13a and 13b illustrated in <FIG>, an example in which the base of the head portion <NUM>, which is the protruding portion, is tightened and has a folded shape is given.

The sheet-like portion 15b of the end portion of the braided wire 11b covers the outer circumference of the crimp member 13a, and the vicinity of the end portion of the sheet-like portion 15b is disposed on the outer circumference of the metal layer <NUM> exposed from the tip end of the braided wire 11a and fixed with the crimp member 13b. In the example illustrated, the braided wire 11b is fixed on a substantially semicircle on an upper side in the circumferential direction of the electromagnetic shield pipe <NUM>. Note that in <FIG>, and <FIG>, the braided wire 11a is disposed on the outer circumference of the electromagnetic shield pipe <NUM> while being in a cylindrical shape, but the arrangement of the braided wire 11a is not limited to this. For example, a sheet-like portion having the same shape as that of the sheet-like portion 15b may be provided in the end portion of the braided wire 11a and disposed on a substantially semicircle in the circumferential direction of the electromagnetic shield pipe <NUM>.

Thus, the braided wires 11a and 11b are disposed at different positions in the longitudinal direction of the electromagnetic shield pipe <NUM> and fixed with the crimp members 13a and 13b on the metal layer <NUM> of the electromagnetic shield pipe <NUM>, respectively. That is, the braided wires 11a and 11b are crimped and fixed with the respective crimp members 13a and 13b of the electromagnetic shield pipe <NUM> without being overlapped in the portion where the crimp members 13a and 13b are disposed.

Note that, as described above, the braided wire 11b is arranged from the end portion side to the base portion side of the electromagnetic shield pipe <NUM> through the outside of the head portion <NUM> of the crimp member 13a, and thus there are concerns about the damage of the braided wire 11b due to the contact with the head portion <NUM>, depending on the arrangement of the braided wire 11b. Thus, a protective member <NUM> may be disposed between the braided wire 11b disposed outside and the head portion <NUM>. That is, in the case where the braided wire 11a is fixed with the crimp member 13a on the end portion side of the electromagnetic shield pipe <NUM>, and the braided wire 11b is fixed with the crimp member 13b through the outer circumference of the crimp member 13a on the base portion side of the electromagnetic shield pipe <NUM>, the protective member <NUM> may be provided between the crimp member 13a and the braided wire 11b. For example, the protective member <NUM> can use the same material as that of the braided wires 11a and 11b.

Note that the arrangement in the circumferential direction of the braided wire 11b (the sheet-like portion 15b) may be applied to a position different from that of the head portion <NUM> in order to avoid the contact between the braided wire 11b and the head portion <NUM>. That is, in the case where the braided wire 11a is fixed with the crimp member 13a on the end portion side of the electromagnetic shield pipe <NUM>, and the braided wire 11b is fixed with the crimp member 13b through the outer circumference of the crimp member 13a on the base portion side of the electromagnetic shield pipe <NUM>, the braided wire 11b is disposed so as to avoid the head portion <NUM> of the crimp member 13a.

<FIG> is a cross-sectional view of the crimp member 13a in this case, and <FIG> is a cross-sectional view of the crimp member 13b. The braided wire 11b fixed on the base portion side of the electromagnetic shield pipe <NUM> is disposed from the end portion side to the base portion side of the electromagnetic shield pipe <NUM> at a position in the circumferential direction in which the head portion <NUM> of the crimp member 13a is not overlapped, thereby avoiding the contact between the braided wire 11b and the head portion <NUM>. This can prevent damage of the braided wire 11b due to the contact with the head portion <NUM>.

Note that, as described above, the number of cables inserted into the electromagnetic shield pipe <NUM> is not limited to two. For example, as illustrated in <FIG> that are cross-sectional views of a portion where the crimp member 13a and 13b are disposed, the cables 9a and 9b may be not one, but may be a plurality. Even in this case, the cables 9a and 9b exposed from the electromagnetic shield pipe <NUM> are respectively covered with the braided wires 11a and 11b, and the braided wires 11a and 11b are crimped at different positions in the longitudinal direction of the electromagnetic shield pipe <NUM>.

In addition, the cables inserted into the electromagnetic shield pipe <NUM> is not limited to the two systems of the cables 9a and 9b. For example, when three or more cables are inserted into the electromagnetic shield pipe <NUM>, three or more braided wires and crimp members are respectively used, and the braided wires are respectively fixed on the electromagnetic shield pipe <NUM> at positions different from each other in the longitudinal direction of the electromagnetic shield pipe <NUM> in such a manner so that respective braided wires are not overlapped with each other in each crimp member.

Next, a manufacturing method of the electromagnetic shield structure 1d will be described. First, the metal layer <NUM> of the end portion of the electromagnetic shield pipe <NUM> is exposed. In addition, the cables 9a and 9b are inserted into the electromagnetic shield pipe <NUM>. Note that, in this case, a braided wire may be disposed on the outer circumference of the cable 9a or the cable 9b in the interior of the electromagnetic shield pipe <NUM>.

Further, <FIG> are views illustrating a state where the cable 9b exposed from the electromagnetic shield pipe <NUM> is covered with the braided wire 11a, and <FIG> is a side view, and <FIG> is a plan view. The end portion of the braided wire 11a covers the end portion (the metal layer <NUM>) of the electromagnetic shield pipe <NUM> while being in a cylindrical shape. In this case, the covering interference of the braided wire 11a is adjusted so as to expose the metal layer <NUM> between the end portion of the braided wire 11a and the outer layer <NUM>.

Note that the stitches of the braided wire 11a can be easily expanded, so that the diameter of the cylinder can be easily increased while the cylindrical shape is maintained. Thus, even when the braided wire 11a in accordance with the size of the cable 9a is used, the end portion of the braided wire 11a can be expanded and to cover the outer circumference of the electromagnetic shield pipe <NUM>.

The hole 17a is formed in part of the braided wire 11a. The hole 17a is formed by expanding the metallic elemental wires of the braided wire 11a to both sides. The hole 17a is formed on the base portion side of the braided wire 11a with respect to a portion caused to cover the electromagnetic shield pipe <NUM>. The hole 17a is a portion penetrated by the cable 9b. Thus, when the cable 9a is inserted from the end portion of the braided wire 11a, the cable 9b is also simultaneously inserted into the braided wire 11a, and the cable 9b is taken out from the hole 17a to the outside. Note that the hole 17a may be formed by opening the cylindrical shape of the braided wire 11a.

Next, as illustrated in <FIG>, the braided wire 11a is crimped and fixed by the crimp member 13a on the metal layer <NUM> of the end portion of the electromagnetic shield pipe <NUM>. Thus, the braided wire 11a is fixed in a state of being disposed across the entire circumference of the metal layer <NUM>.

Further, <FIG> and <FIG> are views illustrating a state where the cable 9b exposed from the electromagnetic shield pipe <NUM> (the braided wire 11a) is covered with the braided wire 11b, and <FIG> is a side view, and <FIG> is a plan view. The cylindrical portion of the end portion (the electromagnetic shield pipe <NUM> side) of the braided wire 11b is loosen, and the sheet-like portion 15b having a predetermined length is formed.

The sheet-like portion 15b of the end portion of the braided wire 11b is arranged on the outside of the braided wire 11a and the crimp member 13a and disposed on the outer circumference of the metal layer <NUM> exposed between the braided wire 11a and the outer layer <NUM>. In this state, the braided wire 11b is crimped and fixed with the crimp member 13b on the electromagnetic shield pipe <NUM>. In this case, the braided wire 11a is disposed not to be overlapped with a portion on which the braided wire 11b is crimped with the crimp member 13b. In this state, the end portion (crimp portion) of the electromagnetic shield pipe <NUM> is covered with a rubber member or the like as appropriate. As described above, the electromagnetic shield structure 1d is formed.

According to the Fifth Embodiment, the same effect as that of the First Embodiment can be achieved. In addition, the braided wires 11a and 11b are crimped on the respective crimp portions without being overlapped with each other at different positions in the longitudinal direction of the electromagnetic <NUM> shield pipe <NUM>. Consequently, in the portions where the crimp members 13a and 13b are disposed, there is no overlapping portion between the braided wires 11a and 11b, and the entire outer circumferential surface of each of the braided wires 11a and 11b is pressed by the crimp members 13a and 13b from the outer circumferential side, and the stable holding strength by the crimp members 13a and 13b can be secured.

In addition, the braided wire 11a is disposed substantially on the entire circumference in the circumferential direction of the electromagnetic shield pipe <NUM>, and the braided wire 11b is disposed substantially on a semicircle in the circumferential direction of the electromagnetic shield pipe <NUM>, so that sufficient contact areas with respect to the metal layer <NUM> can be respectively secured.

In addition, the protective member <NUM> is disposed between the braided wire 11b and the head portion <NUM> of the crimp member 13a, thereby preventing damage of the braided wire 11b due to the head portion <NUM>.

In addition, the braided wire <NUM>1b is disposed at a position different from that of the head portion <NUM> in the circumferential direction to avoid the head portion <NUM> of the crimp member 13a, thereby preventing damage of the braided wire 11b due to the head portion <NUM>.

Next, a Sixth Embodiment not belonging to the present invention will be described. <FIG> is a side view illustrating processes for forming an electromagnetic shield structure according to the Sixth Embodiment.

In the Sixth Embodiment, as is the case with the Fifth Embodiment, first, as illustrated in <FIG>, the cable 9a exposed from the electromagnetic shield pipe <NUM> is inserted into the braided wire 11a. The end portion of the braided wire 11a is caused to cover the end portion (the metal layer <NUM>) of the electromagnetic shield pipe <NUM> while being in a cylindrical shape. In this case, the metal layer <NUM> is exposed between the braided wire 11a and the outer layer <NUM>.

The hole 17a is formed in a part of the braided wire 11a. As described above, the hole 17a is a portion penetrated by the cable 9b. Thus, when the cable 9a is inserted into the braided wire 11a, the cable 9b is also inserted into the braided wire 11a, and the cable 9b is taken out from the hole 17a to the outside. In this state, the braided wire 11a is fixed with the crimp member 13a on the metal layer <NUM>.

Further, <FIG> is a side view illustrating a state where the cable 9b is covered with the braided wire 11b. The sheet-like portion 15b is not formed at the end portion of the braided wire 11b being in a cylindrical shape. The hole 17b penetrated by the braided wire 11a (the cable 9a) is formed in the braided wire 11b.

In this case, first, both the braided wire 11a (the cable 9a) and the cable 9b are inserted from the end portion of the braided wire 11b, and only the braided wire 11a (the cable 9a) is taken out from the hole 17b to the outside of the braided wire 11b, and the cable 9b is inserted into the braided wire 11b as it is.

The end portion of the braided wire 11b is caused to cover the exposed portion of the metal layer <NUM> through the outside of the braided wire 11a and the crimp member 13a. That is, on the outer circumference of the metal layer <NUM> of the electromagnetic shield pipe <NUM>, the braided wire 11a is disposed across the entire circumference, and the braided wire 11b is disposed across substantially the entire outer circumference of the metal layer <NUM> on the base portion side of the electromagnetic shield pipe <NUM> with respect to the braided wire 11a.

Further, <FIG> is a view illustrating an electromagnetic shield structure 1e in which the braided wire 11b is fixed with the crimp member 13b, and <FIG> is a cross-sectional view of a portion where the crimp member 13a is disposed, and <FIG> is a cross-sectional view of a portion where the crimp member 13b is disposed. As illustrated, the braided wires 11a and 11b are fixed with the crimp members 13a and 13b on the metal layer <NUM> of the electromagnetic shield pipe <NUM> at different positions in the longitudinal direction of the electromagnetic shield pipe <NUM>.

As illustrated in <FIG> and <FIG>, the end portions of the braided wires 11a and 11b respectively cover the outer circumference of the electromagnetic shield pipe <NUM> while being in a cylindrical shape. In this case, the cylindrical braided wires 11a and 11b are respectively disposed across the entire circumference of the electromagnetic shield pipe <NUM>, so that the braided wires 11a and <NUM>1b are fixed across the entire outer circumference of the electromagnetic shield pipe <NUM> in the respective crimp portions.

According to the Sixth Embodiment, the same effect as that of the Fifth Embodiment can be achieved. That is, the braided wires 11a and 11b are respectively fixed at different positions in the longitudinal direction of the electromagnetic shield pipe <NUM>, and thus the stability of holding strength or the stability of an energized state of the braided wires 11a and 11b can be obtained.

In addition, the braided wire 11a penetrates the braided wire 11b through the hole 17b, and the braided wires 11a and 11b are fixed substantially on the entire circumference in the circumferential direction of the electromagnetic shield pipe <NUM> on the respective portions. Thus, both the braided wires 11a and 11b are respectively in contact with the metal layer <NUM> across the entire circumference, so that the contact areas between the braided wires 11a and 11b and the metal layer <NUM> can be secured.

Next, a Seventh Embodiment not belonging to the present invention will be described. <FIG> is a side view illustrating an electromagnetic shield pipe <NUM>, and <FIG> is a side view illustrating an electromagnetic shield structure 1f according to the Seventh Embodiment. Note that <FIG> is a perspective view of the braided wires 11a and <NUM>1b, and the illustration of cables is omitted.

In the present embodiment, the outer layer <NUM> in the vicinity of the end portion of the electromagnetic shield pipe <NUM> is not entirely removed, but the outer layer <NUM> partially remains in an annular form. That is, the exposed portions of the metal layers <NUM> are classified by the outer layers <NUM>, and each of the exposed portions of the metal layers <NUM> is caught by the outer layers <NUM> and formed in an annular shape.

As illustrated in <FIG>, the braided wires 11a and 11b are crimped by the crimp members 13a and 13b on the respective metal layers <NUM>. Thus, the braided wires 11a and 11b steadily comes in contact with the metal layers <NUM>, which leads to electrical conduction. Note that the braided wire 11a is crimped with the crimp member 13a, thereby coming into contact with the metal layer <NUM>.

The braided wire 11b is crimped with the crimp member 13b, comes into contact with the metal layer <NUM>, and is disposed outside the braided wire 11a and the crimp member 13a.

In this case, the annular outer layer <NUM> on the tip end side is positioned on the tip end side with respect to the crimping position of the crimp member 13a and the second annular outer layer <NUM> is disposed between the crimping positions of the respective crimp members 13a and 13b. The annular outer layer <NUM> has a larger outer diameter than that of the exposed portion of the metal layer <NUM>. Thus, a large diameter portion formed by the annular outer layer <NUM> is provided on the tip end side of the crimping position of each of the crimp members 13a and 13b with respect to the electromagnetic shield pipe <NUM>. Thus, even when the braided wires 11a and 11b are pulled, and the crimp members 13a and 13b are shifted to the tip end side, the movement of the crimp members 13a and 13b is regulated by the outer layer <NUM>. Consequently, the crimp members 13a and 13b can be prevented from coming off from the electromagnetic shield pipe <NUM>.

According to the Seventh Embodiment, the same effect as that of the Fifth Embodiment can be achieved. That is, the braided wires 11a and 11b are respectively fixed at different positions in the longitudinal direction of the electromagnetic shield pipe <NUM>, and thus the stability of holding strength or the stability of an energized state of the braided wires 11a and 11b can be obtained.

In addition, the outer layers <NUM> provided in an annular form function as a stopper for preventing the crimp members 13a and 13b from coming off, so that the outer layers <NUM> can prevent the crimp members 13a and 13b from coming off from the electromagnetic shield pipe <NUM>. Note that, in place of the outer layers <NUM>, another member such as resin may be adhered to the outer circumferential portion of the metal layer <NUM> in an annular form, thereby forming a large diameter portion on the tip end side of each of the crimping positions.

Claim 1:
An electromagnetic shield structure (1c) comprising:
an electromagnetic shield pipe;
a plurality of cables (9a, 9b) configured to be inserted into the electromagnetic shield pipe (11a, 11b) and exposed from an end portion of the electromagnetic shield pipe (11a, 11b); and
a plurality of cylindrical flexible shield members (11a, 11b) configured to cover the plurality of cables (9a, 9b) exposed from the end portion of the electromagnetic shield pipe, wherein
the plurality of cylindrical flexible shield members (11a, 11b) is fixed with a crimp member (<NUM>) on an outer circumference of the electromagnetic shield pipe, and
an entire outer circumferential surface of each of the plurality of cylindrical flexible shield members (11a, 11b) is pressed by the crimp member (<NUM>) from an outer circumferential side, on a cross section perpendicular to a longitudinal direction of the electromagnetic shield pipe (11a, 11b) in a portion where the crimp member (<NUM>) is disposed,
wherein
the plurality of cylindrical flexible shield members (11a, 11b) is fixed with the crimp member (<NUM>) at an identical position in the longitudinal direction of the electromagnetic shield pipe (11a, 11b), characterized in that
the plurality of cylindrical flexible shield members (11a, 11b) is fixed with the crimp member (<NUM>) in a state of being overlapped across an entire circumference in a circumferential direction, on a cross section perpendicular to the longitudinal direction of the electromagnetic shield pipe (11a, 11b).