Noise-absorbing-member-fixing structure, and wire harness

Abstract

The purpose of the present invention is to provide a noise-absorbing-member-fixing structure and a wire harness 1 that can secure a noise-absorbing member 3 at a desired position along the front-back direction X.　The noise-absorbing-member-fixing structure has an insertion space 3a into which an electric wire 2 is inserted, and secures to the electric wire 2 the noise-absorbing member 3, which is ring-shaped and which suppresses noise in the electric wire 2 inserted in the insertion space 3a, said noise-absorbing-member-fixing structure being characterized by comprising a fixed part 4 fixed to the electric wire 2a in a prescribed position in the front-back direction X, and a cable tie 5 that attaches the noise absorbing member 3 to the fixed part 4.

Description

Technical Field

[0001] The present invention relates to a noise absorption member fixing structure for fixing a noise absorption member that suppresses the propagation of noise current generated in, for example, a power source or an electrical device and the radiation of electromagnetic noise generated in an electric wire, to a predetermined position of the electric wire, and to a wire harness.

Background Art

[0002] In vehicles such as automobiles, a power source and an electrical device or electrical devices are electrically connected using a wire harness in which a plurality of electric wires are bundled. In such a wire harness, a noise absorption member such as a ferrite core is provided to suppress the propagation of noise current generated in the power source or electrical device and the radiation of electromagnetic noise generated in the electric wire (see Patent Document 1).

[0003] By the way, in Patent Document 1, when fixing a noise absorption member to an electric wire, the position of the noise absorption member in the longitudinal direction of the electric wire is regulated by pressing and reducing the diameter of a braided shield that covers the noise absorption member inserted through the electric wire against the electric wire.

[0004] However, in Patent Document 1, when an external force for moving the noise absorption member in the longitudinal direction of the electric wire acts in a state where the position of the noise absorption member is regulated by the braided shield, there is a possibility that the braided shield is pushed apart by the noise absorption member.

[0005] Then, in Patent Document 1, when, for example, fixing tape is wound, there is a problem that the position regulation of the noise absorption member is released and the noise absorption member cannot be fixed at a desired longitudinal position.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] In view of the above problems, an object of the present invention is to provide a noise absorption member fixing structure capable of fixing a noise absorption member at a desired longitudinal position, and a wire harness.

Means for Solving the Problems

[0008] This invention is a noise absorption member fixing structure for fixing an annular noise absorption member, which has an insertion space for inserting an electric wire and suppresses noise of the electric wire inserted into the insertion space, to the electric wire, and includes a fixing portion fixed at a predetermined position in the longitudinal direction of the electric wire, and an attachment portion for attaching the noise absorption member to the fixing portion. and the mounting portion is formed in a long shape that passes between the electric wire and the fixing portion and is wound along the longitudinal direction on the outer peripheral surface of the noise absorbing member It is characterized by the above.

[0009] The present invention also includes a plurality of electric wires, an insertion space for inserting the plurality of electric wires, an annular noise absorption member for suppressing noise of the electric wires inserted into the insertion space, a fixing portion fixed at a predetermined position in the longitudinal direction of the electric wires, and an attachment portion for attaching the noise absorption member to the fixing portion. and the mounting portion is formed in a long shape that is wound around the outer peripheral surface of the noise absorbing member through a gap formed by the plurality of electric wires and the fixing portion The noise absorption member is a wire harness fixed at a predetermined position in the longitudinal direction of the electric wire by the cooperation of the fixing portion and the attachment portion, which is characterized by the above.

[0010] The noise of the above electric wire refers to a noise current flowing through the electric wire and / or electromagnetic noise generated by the electric wire. The above fixing portion refers to a fixing tape or a binding band fixed to the electric wire, a gripping member gripped and fixed to the electric wire, or a locking member to which the noise absorption member is locked.

[0011] The above attachment portion refers to a binding band or a belt-like tightening member wound around the noise absorption member and the fixing portion, or a locked portion provided on the noise absorption member and locked to the locking member which is the fixing portion.

[0012] According to the present invention, since the fixing portion for attaching the noise absorbing member via the attachment portion is fixed to a predetermined position of the electric wire, the fixing portion does not shift in the longitudinal direction of the electric wire. Therefore, the noise absorbing member fixing structure can fix the noise absorbing member to the electric wire simply by attaching the noise absorbing member to the fixing portion by the attachment portion.

[0013] At this time, the noise absorbing member fixing structure can function the fixing portion as positioning means for positioning the position of the noise absorbing member in the longitudinal direction of the electric wire. Thereby, the noise absorbing member fixing structure can fix the noise absorbing member to the electric wire efficiently and easily as compared with the case of fixing the noise absorbing member to the electric wire using the braided shield while positioning the position of the noise absorbing member.

[0014] Therefore, the noise absorbing member fixing structure and the wire harness to which this is applied can fix a noise absorbing member whose longitudinal position with respect to the noise of the electric wire is severe to a desired longitudinal position.

[0015] Also The attachment portion is formed in a long shape that passes between the electric wire and the fixing portion and is wound along the outer peripheral surface of the noise absorbing member in the longitudinal direction there is

[0016] According to this configuration, since the attachment portion is formed in a long shape wound along the outer peripheral surface of the noise absorbing member in the longitudinal direction, the noise absorbing member can be fixed to the electric wire with a simple configuration.

[0017] Furthermore, since the attachment portion passing between the electric wire and the fixing portion is wound around the outer peripheral surface of the noise absorbing member, the noise absorbing member fixing structure can attach the entire longitudinal region of the noise absorbing member to the fixing portion by the attachment portion. Therefore, the noise absorbing member fixing structure can make the fixing state of the noise absorbing member with respect to the electric wire more stable.

[0018] ThisAs an aspect of the invention, the fixing portion may be a fixing tape wound around the electric wire at a predetermined position in the longitudinal direction of the electric wire. According to this configuration, the fixing portion can be easily configured, and the weight of the fixing portion can be significantly reduced compared to a fixing portion made of metal or resin. Furthermore, by configuring the fixing portion with a fixing tape, the noise absorption member fixing structure can securely fix the fixing portion at a desired predetermined position in the longitudinal direction.

[0019] In addition, by changing the range in the longitudinal direction in which the fixing tape is wound according to the length of the noise absorption member in the longitudinal direction of the electric wire, the noise absorption member fixing structure can configure a fixing portion having a longitudinal length suitable for attaching the noise absorption member via the attachment portion. Thereby, the noise absorption member fixing structure can fix the noise absorption member to the electric wire in a more stable state.

[0020] Also, as an aspect of the present invention, the fixing portion holds a plurality of the electric wires in a bundled state, and the attachment portion may be formed in an elongated shape that is wound around the outer peripheral surface of the noise absorption member through a gap formed by the plurality of the electric wires and the fixing portion.

[0021] According to this configuration, since the attachment portion is formed in an elongated shape that is wound around the outer peripheral surface of the noise absorption member along the longitudinal direction, the noise absorption member can be fixed to the electric wire with a simple configuration.

[0022] Furthermore, since the attachment portion passes through the gap formed by the plurality of electric wires and the fixing portion, the noise absorption member fixing structure can utilize the gap formed by the plurality of electric wires and the fixing portion to wind the attachment portion.

[0023] Therefore, the noise absorption member fixing structure facilitates the attachment of the attachment portion to the fixing portion and can make the fixing portion more compact compared to a fixing portion provided with an insertion portion for passing the attachment portion.

[0024] Also, as an aspect of the present invention, the attachment part may be a binding band having a long strip-shaped band part and a lock part to which the band part wound in a ring shape is locked and fixed. According to this configuration, the noise absorption member can be attached to the fixing part by the tightening force when the band part of the binding band constituting the attachment part is locked to the lock part.

[0025] At this time, the noise absorption member fixing structure can position-regulate the noise absorption member at a desired predetermined position by tightening the binding band. Thereby, in the noise absorption member fixing structure, the alignment of the noise absorption member with respect to the fixing part becomes easy, so that the assemblability of the noise absorption member can be improved.

[0026] Also, as an aspect of the present invention, the noise absorption member is composed of a plurality of annular bodies juxtaposed in the longitudinal direction, and the length of the fixing part in the longitudinal direction is the same as the length of the noise absorption member in the longitudinal direction, or slightly shorter than the length of the noise absorption member in the longitudinal direction.

[0027] The length slightly shorter than the length in the longitudinal direction of the noise absorption member means, for example, a length within a tolerance range with respect to the length in the longitudinal direction of the noise absorption member. According to this configuration, the noise absorption member can be surely fixed at a desired longitudinal position, and abnormal noise due to contact between the annular bodies constituting the noise absorption member can be prevented.

[0028] Specifically, the longer the length of the fixing part is than the length of the noise absorption member, the longer the fixing part side is the long side, and the annular attachment part having a long strip shape in a substantially trapezoidal shape with a large difference in length between the long side and the short side is wound.

[0029] For this reason, the load for closely attaching a plurality of annular bodies constituting the noise absorption member in the longitudinal direction becomes low, and when an external force such as vibration acts on the electric wire, there is a possibility that adjacent annular bodies repeatedly separate and contact to generate abnormal noise.

[0030] On the other hand, since the length of the fixing portion is the same as or slightly shorter than the length of the noise absorbing member, it can be wound around the end face and the outer peripheral face of the noise absorbing member so that the mounting portion is close to or in contact with them.

[0031] Thereby, the noise absorbing member fixing structure can surely restrict the movement of the noise absorbing member in the longitudinal direction by the mounting portion, and can prevent the relative movement in the longitudinal direction of the annular bodies constituting the noise absorbing member.

[0032] Therefore, the noise absorbing member fixing structure can surely fix the noise absorbing member at a desired longitudinal position, and can prevent abnormal noise caused by contact between the annular bodies constituting the noise absorbing member.

[0033] As an aspect of the present invention, the noise absorbing member is composed of a plurality of annular bodies juxtaposed in the longitudinal direction, and the length of the fixing portion in the longitudinal direction may be the same as the length of the noise absorbing member in the longitudinal direction or slightly longer than the length of the noise absorbing member in the longitudinal direction.

[0034] The length slightly longer than the length in the longitudinal direction of the noise absorbing member means, for example, a length that is longer within a tolerance range with respect to the length in the longitudinal direction of the noise absorbing member. According to this configuration, the noise absorbing member can be surely fixed at a desired longitudinal position, and abnormal noise caused by contact between the annular bodies constituting the noise absorbing member can be prevented.

[0035] Specifically, the shorter the length of the fixing portion is than the length of the noise absorbing member, the more likely the position of the annular body with respect to the fixing portion is unstable. For example, when tightening a long mounting portion, there is a risk that the annular body will tilt so that the inner peripheral surface of the annular body intersects the longitudinal direction.

[0036] On the other hand, since the length of the fixing portion is the same as or slightly longer than the length of the noise absorbing member, the noise absorbing member fixing structure prevents the mounting portion from contacting the edge on the inner peripheral surface side of the annular body.

[0037] Therefore, the noise absorbing member fixing structure can facilitate the tightening of the mounting portion and suppress the tilting of the annular body when tightening the mounting portion. Furthermore, the noise absorbing member fixing structure can be wound around the end face and the outer peripheral face of the noise absorbing member such that the mounting portion is close to or in contact with them.

[0038] Thereby, the noise absorbing member fixing structure can prevent relative movement in the longitudinal direction of the annular body constituting the noise absorbing member and prevent the annular body from tilting such that the inner peripheral surface intersects the longitudinal direction.

[0039] Thus, the noise absorbing member fixing structure can securely fix the noise absorbing member at a desired longitudinal position and prevent abnormal noise due to contact between the annular bodies constituting the noise absorbing member.

[0040] Also, as an aspect of the present invention, the locking portion of the binding band may be arranged adjacent to the end face of the noise absorbing member in the longitudinal direction of the electric wire, and the band portion of the binding band may be inserted and fixed to the locking portion on the inner peripheral surface side of the noise absorbing member rather than the base portion of the band portion.

[0041] According to this configuration, since the locking portion is adjacent to the end face of the noise absorbing member, an increase in the outer shape can be suppressed compared to the case where the locking portion is located on the outer peripheral surface of the noise absorbing member. Therefore, the noise absorbing member fixing structure can easily secure a gap between the noise absorbing member and peripheral components.

[0042] Furthermore, since the band portion of the binding band is inserted and fixed to the locking portion on the inner peripheral surface side of the noise absorption member rather than the base portion of the band portion, in the noise absorption member fixing structure, when the band portion is locked to the locking portion, the band portion is pulled substantially parallel to the longitudinal direction of the electric wire.

[0043] As a result, the noise absorption member fixing structure can prevent the annular body from tilting so that the inner peripheral surface intersects the longitudinal direction of the electric wire, and can reliably bring the annular bodies into contact with each other in the longitudinal direction.

[0044] In another aspect of the present invention, the noise absorption member may be composed of a plurality of annular bodies juxtaposed in the longitudinal direction. According to this configuration, since the noise absorption member is composed of a plurality of annular bodies, it is possible to suppress an increase in the size of the noise absorption member and ensure the noise absorption performance. Therefore, the noise absorption member fixing structure can easily secure a gap between the noise absorption member and peripheral components.

Advantages of the Invention

[0045] According to the present invention, it is possible to provide a noise absorption member fixing structure capable of fixing a noise absorption member at a desired longitudinal position, and a wire harness.

Brief Description of the Drawings

[0046]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0047] An embodiment of this invention will be described below with reference to the drawings. This embodiment will describe a fixing structure for fixing a noise absorption member 3 that suppresses the propagation of noise current generated in a power supply or an electric device and the radiation of electromagnetic noise generated in an electric wire 2 at a predetermined position in the longitudinal direction of the electric wire 2, with reference to FIGS. 1 to 5.

[0048] Note that FIG. 1 shows a front view of a wire harness 1 including a noise absorption member 3, FIG. 2 is an explanatory diagram for explaining the outline of the wire harness 1, FIG. 2(a) shows an external perspective view of the wire harness 1 including the noise absorption member 3, and FIG. 2(b) shows an external perspective view of the wire harness 1 with the upper part of the noise absorption member 3 shown in a transparent state.

[0049] Furthermore, FIG. 3 shows a plan view of the wire harness 1 with the noise absorption member 3 shown in a cross-section taken along the line A-A in FIG. 1, FIG. 4 shows an enlarged cross-sectional view of the main part taken along the line B-B in FIG. 1, and FIG. 5 shows an explanatory diagram for explaining the length of the fixing portion 4 in the front-rear direction X.

[0050] Furthermore, with the upper side of FIG. 1 being the upper side of the wire harness 1, the arrow X in the figure indicates the front-rear direction of the wire harness 1 (hereinafter referred to as the front-rear direction X). Also, for clarity of illustration, in FIGS. 2 to 5, the illustration of the braided shield 6 is omitted.

[0051] First, as shown in FIGS. 1 and 2, the wire harness 1 of this embodiment includes two electric wires 2 having the front-rear direction X as the longitudinal direction, a noise absorption member 3 through which the two electric wires 2 are inserted, a fixing portion 4 and a binding band 5 for fixing the noise absorption member 3 to the two electric wires 2, and a braided shield 6 that integrally covers these.

[0052] Although detailed illustration is omitted, both ends of the wire harness 1 in the front-rear direction X are connected to an electrical device via a connector at one end and to a power source or an electrical device via a connector at the other end.

[0053] Specifically, the two electric wires 2 of the wire harness 1 are each configured by covering a conductor (not shown) having conductivity with an insulating coating (not shown) having insulation. These two electric wires 2 are bundled by a fixing portion 4 described later and the relative movement in the front-rear direction X is restricted.

[0054] In addition, the noise absorption member 3 of the wire harness 1 has a function of suppressing the radiation of noise current flowing through the electric wire 2 and / or electromagnetic noise generated by the electric wire 2. As shown in FIGS. 2 to 4, this noise absorption member 3 has an insertion space 3a inside that can insert at least two electric wires 2 when viewed from the front-rear direction X, and is formed in an annular body extending in the front-rear direction X.

[0055] Note that the insertion space 3a of the noise absorption member 3 is formed by an inner peripheral surface having a diameter larger than the outer diameter of the two bundled electric wires 2, and is formed to have a size capable of inserting, for example, three electric wires 2, as shown in FIGS. 3 and 4.

[0056] Such a noise absorption member 3 is fixed to a predetermined position in the front-rear direction X of the two electric wires 2 bundled in a state where relative movement is impossible, using the fixing portion 4 and the binding band 5 described later. At this time, as shown in FIGS. 3 and 4, the noise absorption member 3 is positioned at a position where the radial center of the inner peripheral surface is offset with respect to the two electric wires 2, and the inner peripheral surface is in contact with the two electric wires 2.

[0057] More specifically, as shown in FIGS. 2 and 3, the noise absorption member 3 is composed of two core members 31 juxtaposed in the front-rear direction X. These two core members 31 are, for example, magnetic bodies made of ferrite having soft magnetism, and are formed in an annular body having the same inner and outer diameters and the same length in the front-rear direction X as the other core member 31.

[0058] Moreover, the fixing portion 4 of the wire harness 1 is formed of a fixing tape wound around the electric wires 2 to bundle the two electric wires 2 at a predetermined position in the front-rear direction X. Therefore, the fixing portion 4 is fixed at least in a position in the front-rear direction X with respect to the two bundled electric wires 2.

[0059] As shown in FIG. 4, the fixing portion 4 and the two electric wires 2 bundled with the fixing tape form a gap G having a substantially triangular shape in a front view. Furthermore, the fixing tape constituting the fixing portion 4 is wound around the fixing portion 4 so that the length in the front-rear direction X is approximately equal to the length of the noise absorbing member 3 in the front-rear direction X.

[0060] Specifically, the fixing tape constituting the fixing part 4 is wound over a length in the front-rear direction X that is the same as the length of the noise absorbing member 3 in the front-rear direction X, or over a range of a length in the front-rear direction X that is the length of the noise absorbing member 3 in the front-rear direction X plus a tolerance length.

[0061] Here, the above-mentioned tolerance length is a length set based on the thickness t of the noise absorbing member 3, which is the difference between the outer diameter and the inner diameter of the noise absorbing member 3, as shown in FIG. 5, and is set to ±t / 2 here.

[0062] Therefore, when the length of the noise absorbing member 3 in the front-rear direction X is W, the fixing part 4 is configured by wrapping a fixing tape around it so that the length L in the front-rear direction X satisfies (Wt / 2)≦L≦(W+t / 2), as shown in FIG. 5 .

[0063] The cable tie 5 of the wire harness 1 is a mounting member for mounting the noise absorbing member 3 to the fixed portion 4, and is wound around the noise absorbing member 3 in a ring shape along the front-rear direction X.

[0064] As shown in FIG. 3, this cable tie 5 is integrally formed of a roughly belt-shaped band portion 51 having serrations on one main surface, and a lock portion 52 that is connected to one longitudinal end of the band portion 51 and that engages and fixes the other longitudinal end of the band portion 51 by pulling.

[0065] More specifically, the locking portion 52 has a substantially box shape that is wider than the band width of the band portion 51, and an insertion hole 52a (see Fig. 2(a)) through which the band portion 51 is inserted is formed to open in a direction orthogonal to the direction in which the band portions 51 are continuously provided. Furthermore, a claw portion (not shown) that engages with the serration of the band portion 51 inserted from one side in the orthogonal direction is provided inside the insertion hole 52a of the locking portion 52.

[0066] As shown in Figs. 2 and 3, such a binding band 5 is wound around the noise absorbing member 3 such that the locking portion 52 is adjacent in the front-rear direction X. At this time, the locking portion 52 is arranged such that the insertion hole 52a is located radially inside the noise absorbing member 3 with respect to the base of the band portion 51.

[0067] Furthermore, as shown in Figs. 3 and 4, the binding band 5 has the band portion 51 wound from the outer peripheral surface of the noise absorbing member 3 toward the insertion space 3a along the front-rear direction X, and the band portion 51 is inserted through the insertion hole 52a of the locking portion 52 through the gap G formed by the two electric wires 2 and the fixing portion 4.

[0068] Also, as shown in Fig. 1, the braided shield 6 of the wire harness 1 is a cylindrical braided tube in which a plurality of metal wires are braided in a mesh shape, and is fixed to the two electric wires 2 using an appropriate member such as an adhesive tape or a binding band. Note that the braided shield 6 is formed in a cylindrical shape having an inner diameter substantially the same as the outer diameter of the noise absorbing member 3, and the portion covering the electric wire 2 is crushed so as to be in close contact with the electric wire 2.

[0069] Next, an example of the fixing process of fixing the noise absorbing member 3 to the two electric wires 2 in the wire harness 1 having the above-described configuration will be described with reference to Figs. 6 and 7. Note that Fig. 6 shows an explanatory diagram for explaining the fixing process of the noise absorbing member 3.

[0070] Specifically, FIG. 6(a) shows a plan view of a state where the fixing portion 4 is fixed to the two electric wires 2, and FIG. 6(b) shows a plan view of a state where the bundling band 5 is inserted into the gap G between the fixing portion 4 and the electric wire 2. Furthermore, FIG. 7 shows a plan view of a state where the band portion 51 of the bundling band 5 is inserted through the locking portion 52.

[0071] First, as shown in FIG. 6(a), an operator or an assembling device winds and bundles a fixing tape around the two electric wires 2 at a predetermined position in the desired front-rear direction X such that the length L in the front-rear direction X satisfies (W - t / 2) ≤ L ≤ (W + t / 2), and forms the fixing portion 4 with the wound fixing tape. After forming the fixing portion 4, the operator or the assembling device inserts the two core members 31 through the two electric wires 2 bundled by the fixing portion 4.

[0072] Thereafter, as shown in FIG. 6(b), the operator or the assembling device inserts the band portion 51 of the bundling band 5 from one side in the front-rear direction X into the internal space of the two core members 31 and the gap G between the fixing portion 4 and the electric wire 2, and guides the tip of the band portion 51 out from the other side in the front-rear direction X.

[0073] When passing the band portion 51 of the bundling band 5 through the gap G between the fixing portion 4 and the electric wire 2, the operator or the assembling device curves the locking portion 52 side of the band portion 51 toward the other side in the front-rear direction X as shown in FIG. 7, and inserts the tip of the band portion 51 into the insertion hole 52a of the locking portion 52.

[0074] Then, the operator or the assembling device pulls the tip of the band portion 51 protruding from the insertion hole 52a to move the noise absorption member 3 to the desired predetermined position while locking and fixing the band portion 51 to the locking portion 52.

[0075] At this time, the two core members 31 also form the noise absorption member 3 with their end faces in the front-rear direction X abutting against each other along with the locking of the band portion 51, and their inner peripheral surfaces abut against the fixing portion 4 (see FIG. 3). Furthermore, since the distance between the band portions 51 of the binding band 5 facing each other in the front-rear direction X is substantially the same as the length L of the fixing portion 4 in the front-rear direction X, the movement of the noise absorbing member 3 in the front-rear direction X is restricted.

[0076] In addition, since the inner peripheral surface of the noise absorbing member 3 abuts against the fixing portion 4, the movement of the noise absorbing member 3 in the radial direction thereof is restricted. In this way, the noise absorbing member 3 is fixed at a predetermined position in the front-rear direction X of the two electric wires 2.

[0077] When the noise absorbing member 3 is fixed to the electric wire 2 via the binding band 5, an operator or an assembling device covers the noise absorbing member 3 with the braided shield 6 inserted through the electric wire 2 in advance, and reduces the diameter of the portion covering the two electric wires 2 to bring it into close contact with the two electric wires 2.

[0078] Thereafter, the operator or the assembling device can fix the braided shield 6 to the two electric wires 2 using an appropriate member such as an adhesive tape or a binding band, and manufacture the wire harness 1 provided with the noise absorbing member 3.

[0079] The wire harness 1 configured in this way has a noise absorbing member fixing structure 7. The noise absorbing member fixing structure 7 of the present embodiment is a fixing structure for fixing an annular noise absorbing member 3 having an insertion space 3a through which the electric wire 2 is inserted and suppressing the noise of the electric wire 2 inserted into the insertion space 3a to the electric wire 2.

[0080] This noise absorbing member fixing structure 7 includes a fixing portion 4 fixed at a predetermined position in the front-rear direction X of the electric wire 2 and an attachment portion (binding band 5) for attaching the noise absorbing member 3 to the fixing portion 4.

[0081] In addition, the wire harness 1 of the present embodiment includes a plurality of electric wires 2, an insertion space 3a through which the plurality of electric wires 2 are inserted, an annular noise absorbing member 3 for suppressing the noise of the electric wire 2 inserted into the insertion space 3a, and the above-described fixing portion 4 and attachment portion (binding band 5).

[0082] And the wire harness 1 has the noise absorption member 3 fixed at a predetermined position in the front-rear direction X of the electric wire 2 by the cooperation of the fixing portion 4 and the mounting portion (the bundling band 5).

[0083] According to this configuration, since the fixing portion 4 for attaching the noise absorption member 3 via the bundling band 5 is fixed at a predetermined position of the electric wire 2, the fixing portion 4 does not shift in position in the front-rear direction X of the electric wire 2. Therefore, the noise absorption member fixing structure 7 can fix the noise absorption member 3 to the electric wire 2 only by attaching the noise absorption member 3 to the fixing portion 4 with the bundling band 5.

[0084] At this time, the noise absorption member fixing structure 7 can function the fixing portion 4 as a positioning means for positioning the position of the noise absorption member 3 in the front-rear direction X of the electric wire 2. Thereby, the noise absorption member fixing structure 7 can fix the noise absorption member 3 to the electric wire 2 efficiently and easily as compared with the case of fixing the noise absorption member 3 to the electric wire 2 using a braided shield while positioning the position of the noise absorption member 3.

[0085] Therefore, the noise absorption member fixing structure 7 and the wire harness 1 to which this is applied can fix the noise absorption member 3 with a strict position in the front-rear direction X against the noise of the electric wire 2 at a desired position in the front-rear direction X.

[0086] Further, the fixing portion 4 holds a plurality of bundled electric wires 2. And the band portion 51 of the bundling band 5 is formed in a long shape wound around the outer peripheral surface of the noise absorption member 3 through the gap G formed by the plurality of electric wires 2 and the fixing portion 4.

[0087] According to this configuration, since the band portion 51 of the bundling band 5 is formed in a long shape wound around the outer peripheral surface of the noise absorption member 3 along the front-rear direction X, the noise absorption member 3 can be fixed to the electric wire 2 with a simple configuration.

[0088] Furthermore, since the band portion 51 of the binding band 5 passes through the gap G formed by the plurality of electric wires 2 and the fixing portion 4, the noise absorption member fixing structure 7 can wind the band portion 51 by taking advantage of the gap G formed by the plurality of electric wires 2 and the fixing portion 4.

[0089] Therefore, the noise absorption member fixing structure 7 facilitates the attachment of the binding band 5 to the fixing portion 4, and can make the fixing portion 4 more compact than a fixing portion provided with an insertion portion through which the binding band 5 passes.

[0090] In addition, since the attachment portion is constituted by the binding band 5 having the long strip-shaped band portion 51 and the locking portion 52 to which the annularly wound band portion 51 is locked and fixed, the noise absorption member fixing structure 7 can attach the noise absorption member 3 to the fixing portion 4 by the tightening force when the band portion 51 is locked to the locking portion 52.

[0091] At this time, the noise absorption member fixing structure 7 can position-regulate the noise absorption member 3 at a desired predetermined position by tightening the binding band 5. Thereby, the noise absorption member fixing structure 7 facilitates the alignment of the noise absorption member 3 with respect to the fixing portion 4, and thus the assemblability of the noise absorption member 3 can be improved.

[0092] In addition, since the fixing portion 4 is a fixing tape wound around the plurality of electric wires 2 at a predetermined position in the front-rear direction X of the electric wires 2, the noise absorption member fixing structure 7 can easily configure the fixing portion 4 that forms the gap G through which the binding band 5 passes with two electric wires 2, and can significantly reduce the weight of the fixing portion 4 compared to a fixing portion made of metal or resin. Furthermore, by configuring the fixing portion 4 with the fixing tape, the noise absorption member fixing structure 7 can reliably fix the fixing portion 4 at a desired predetermined position in the front-rear direction X.

[0093] In addition, by changing the range in the front-rear direction X in which the fixing tape is wound according to the length of the noise absorption member 3 in the front-rear direction X, the noise absorption member fixing structure 7 can form a fixing portion 4 having a length in the front-rear direction X suitable for attaching the noise absorption member 3 via the binding band 5. Thereby, the noise absorption member fixing structure 7 can fix the noise absorption member 3 to the electric wire 2 in a more stable state.

[0094] Further, the noise absorption member 3 is composed of a plurality of core members 31 juxtaposed in the front-rear direction X. And the length L of the fixing portion 4 is equal to or greater than the length obtained by subtracting half of the thickness t of the noise absorption member 3 from the length W of the noise absorption member 3 and equal to or less than the length W of the noise absorption member 3.

[0095] According to this configuration, the noise absorption member 3 can be reliably fixed at a desired position in the front-rear direction X, and abnormal noise due to contact between the core members 31 constituting the noise absorption member 3 can be prevented.

[0096] Specifically, as the length L of the fixing portion 4 becomes longer than the length W of the noise absorption member 3, as shown in FIG. 8(a), the binding band 5 is wound in a substantially trapezoidal annular shape with the fixing portion 4 side as the long side and the difference in length between the long side and the short side being large.

[0097] Therefore, the load for bringing the two core members 31 constituting the noise absorption member 3 into close contact in the front-rear direction X is reduced, and when an external force such as vibration acts on the wire harness 1, the two core members 31 may repeatedly separate and contact to generate abnormal noise.

[0098] On the other hand, since the length L of the fixing portion 4 is the same as or slightly shorter than the length W of the noise absorption member 3, the noise absorption member fixing structure 7 can be wound so that the band portion 51 of the binding band 5 is close to or in contact with the end face and the outer peripheral face of the noise absorption member 3.

[0099] As a result, the noise absorption member fixing structure 7 can reliably restrict the movement of the noise absorption member 3 in the front-rear direction X by the band portion 51, and can prevent the relative movement of the core members 31 constituting the noise absorption member 3 in the front-rear direction X.

[0100] Therefore, the noise absorption member fixing structure 7 can reliably fix the noise absorption member 3 at a desired position in the front-rear direction X, and can prevent abnormal noise caused by contact between the core members 31 constituting the noise absorption member 3.

[0101] Further, the noise absorption member 3 is composed of a plurality of core members 31 juxtaposed in the front-rear direction X. And the length L of the fixing portion 4 is equal to or greater than the length W of the noise absorption member 3 and equal to or less than the length obtained by adding half of the thickness t of the noise absorption member 3 to the length W of the noise absorption member 3.

[0102] According to this configuration, the noise absorption member 3 can be reliably fixed at a desired position in the front-rear direction X, and abnormal noise caused by contact between the core members 31 constituting the noise absorption member 3 can be prevented.

[0103] Specifically, as the length L of the fixing portion 4 becomes shorter than the length W of the noise absorption member 3, as shown in FIG. 8(b), the position of the core member 31 with respect to the fixing portion 4 may become unstable. For example, when tightening the binding band 5, the core member 31 may tilt so that the inner peripheral surface of the core member 31 intersects the front-rear direction X.

[0104] On the other hand, since the length L of the fixing portion 4 is equal to or slightly longer than the length W of the noise absorption member 3, in the noise absorption member fixing structure 7, the band portion 51 of the binding band 5 does not contact the edge on the inner peripheral surface side of the core member 31.

[0105] Therefore, the noise absorption member fixing structure 7 makes it easier to tighten the binding band 5 and can suppress the tilting of the core member 31 when tightening the binding band 5. Furthermore, the noise absorption member fixing structure 7 can be wound around the end face and the outer peripheral face of the noise absorption member 3 so that the band portion 51 of the binding band 5 is close to or in contact with them.

[0106] Thereby, the noise absorption member fixing structure 7 can prevent the relative movement of the core member 31 constituting the noise absorption member 3 in the front-rear direction X, and can prevent the core member 31 from tilting so that the inner peripheral surface intersects the front-rear direction X.

[0107] Therefore, the noise absorption member fixing structure 7 can surely fix the noise absorption member 3 at a desired position in the front-rear direction X, and can prevent abnormal noise caused by contact between the core members 31 constituting the noise absorption member 3.

[0108] Also, the lock portion 52 of the binding band 5 is disposed adjacent to the end face of the noise absorption member 3 in the front-rear direction X of the electric wire 2. And the band portion 51 of the binding band 5 is inserted and fixed to the lock portion 52 on the inner peripheral surface side of the noise absorption member 3 rather than the base portion of the band portion 51.

[0109] According to this configuration, since the lock portion 52 is adjacent to the end face of the noise absorption member 3, an increase in the outer shape can be suppressed as compared with the case where the lock portion 52 is located on the outer peripheral surface of the noise absorption member 3. For this reason, the noise absorption member fixing structure 7 can easily secure the gap G between the noise absorption member 3 and the peripheral components.

[0110] Furthermore, since the band portion 51 of the binding band 5 is inserted and fixed to the lock portion 52 on the inner peripheral surface side of the noise absorption member 3 rather than the base portion of the band portion 51, when the band portion 51 is locked to the lock portion 52 by the noise absorption member fixing structure 7, the band portion 51 is pulled substantially parallel to the front-rear direction X.

[0111] Thereby, the noise absorption member fixing structure 7 can prevent the core member 31 from tilting so that the inner peripheral surface intersects the front-rear direction X, and can surely bring the core members 31 into contact with each other in the front-rear direction X.

[0112] Further, since the noise absorption member 3 is composed of a plurality of core members 31 juxtaposed in the front-rear direction X, the noise absorption member fixing structure 7 can suppress the enlargement of the noise absorption member 3 and secure the noise absorption performance. Therefore, the noise absorption member fixing structure 7 can easily secure the gap G between the noise absorption member 3 and the peripheral components.

[0113] In the correspondence between the configuration of this invention and the above-described embodiment, the longitudinal direction of this invention corresponds to the front-rear direction X of the embodiment, similarly hereinafter, the attachment portion corresponds to the binding band 5, the annular body corresponds to the core member 31, but this invention is not limited to only the configuration of the above-described embodiment, and many embodiments can be obtained.

[0114] Specifically, in the above-described embodiment, the noise absorption member 3 is composed of two core members 31, but it is not limited to this, and the number of core members 31 is desirably an appropriate number according to the desired noise absorption performance.

[0115] Also, the noise absorption member 3 composed of two core members 31 is made into the wire harness 1 inserted and fixed to the two electric wires 2, but it is not limited to this, and the number of electric wires 2 may be an appropriate number as long as there is at least one.

[0116] For example, the noise absorption member 3 composed of two core members 31 may be configured to be fixed to one electric wire 2. In this case, while sandwiching between the electric wire 2 and the fixing portion 4, the binding band 5 in a long shape is fixed to the electric wire 2 with the fixing tape constituting the fixing portion 4, and the binding band 5 in a long shape is wound around the noise absorption member 3 in the same manner as in the above-described embodiment.

[0117] In this case, since the binding band 5 passes between the electric wire 2 and the fixing portion 4 and is wound around the outer peripheral surface of the noise absorption member 3 along the front-rear direction X, the noise absorption member fixing structure 7 can fix the noise absorption member 3 to the electric wire 2 with a simple configuration.

[0118] Furthermore, since the bundling band 5 passing between the electric wire 2 and the fixing portion 4 is wound around the outer peripheral surface of the noise absorption member 3, the noise absorption member fixing structure 7 can attach the entire region of the noise absorption member 3 in the front-rear direction X to the fixing portion 4 by the bundling band 5. Therefore, the noise absorption member fixing structure 7 can make the fixing state of the noise absorption member 3 with respect to the electric wire 2 more stable.

[0119] In addition, since the fixing portion 4 is composed of a fixing tape wound around the electric wire 2 at a predetermined position in the front-rear direction X of the electric wire 2, the fixing portion 4 can be easily configured, and the weight of the fixing portion 4 can be significantly reduced compared to a fixing portion made of metal or resin. Furthermore, by configuring the fixing portion 4 with the fixing tape, the noise absorption member fixing structure 7 can surely fix the fixing portion 4 at a predetermined position in the desired front-rear direction X.

[0120] In addition, by changing the range in the front-rear direction X where the fixing tape is wound according to the length of the noise absorption member 3 in the front-rear direction X, the noise absorption member fixing structure 7 can configure the fixing portion 4 having a length in the front-rear direction X suitable for attaching the noise absorption member 3 via the bundling band 5. Thereby, the noise absorption member fixing structure 7 can fix the noise absorption member 3 to the electric wire 2 in a more stable state.

[0121] When fixing the noise absorption member 3 to one electric wire 2, similar to the above-described embodiment, the fixing tape may be wound so that the length L of the fixing portion 4 in the front-rear direction X satisfies (W - t / 2) ≤ L ≤ (W + t / 2) to configure the fixing portion 4.

[0122] Also, although the wire harness 1 with one noise absorption member 3 fixed is used, the present invention is not limited to this, and a wire harness 1 in which a plurality of noise absorption members 3 are fixed at a predetermined interval in the front-rear direction X may be used.

[0123] Also, although the core member 31 is made of a ferrite magnetic material having soft magnetism, it is not limited to this. As long as it is possible to suppress the noise current flowing through the electric wire 2 and / or the radiation of electromagnetic noise generated by the electric wire 2, a core member made of an appropriate material and configuration may be used. For example, it may be a core member around which a conductor is wound.

[0124] Also, although the fixing portion 4 is configured by a fixing tape, it is not limited to this. As long as it can be fixed to the electric wire 2 in a state where at least the movement in the front-rear direction X is restricted, the fixing portion 4 may be configured by a binding band or a gripping member that integrally grips two electric wires 2.

[0125] Also, although the noise absorption member 3 is fixed to the fixing portion 4 using the binding band 5, it is not limited to this. As long as it is a long attachment portion that can be wound around the noise absorption member 3 through the gap G between the fixing portion 4 and the electric wire 2, an attachment portion with an appropriate configuration may be used.

[0126] Also, a configuration in which a plurality of electric wires 2 are bundled and a locked portion provided on the noise absorption member 3 is locked to a locking member fixed to the plurality of electric wires 2 may be used. Even in this case, the noise absorption member 3 can be fixed at a desired predetermined position in the same manner as in the above-described embodiment.

[0127] Also, as an example, the length L of the fixing portion 4 in the front-rear direction X is set to the same length in the front-rear direction X as the length of the noise absorption member 3 in the front-rear direction X, or a length obtained by adding a tolerance length (±t / 2) to the length W of the noise absorption member 3 in the front-rear direction X, but it is not limited to this.

[0128] More specifically, the length L of the fixing portion 4 in the front-rear direction X may be an appropriate length in the front-rear direction X as long as the noise absorption member 3 can be position-regulated by the binding band 5 at a predetermined position in the front-rear direction X of the electric wire 2. For example, (W - t / 2) ≤ L or L ≤ (W + t / 2) may be satisfied.

[0129] Also, a wire harness 1 is provided with a braided shield 6 that covers two electric wires 2 to which a noise absorption member 3 is fixed, but it is not limited to this, and a wire harness 1 without a braided shield 6 may also be used.

[0130] Also, the braided shield 6 has an inner diameter substantially the same as the outer diameter of the noise absorption member 3, but it is not limited to this, and the braided shield 6 may have an inner diameter substantially the same as the outer diameter of the two electric wires 2. In this case, the braided shield 6 is expanded so as to increase its diameter, the noise absorption member 3 is covered, and then the portion covering the electric wires 2 is crushed and its diameter is reduced to make it adhere closely to the electric wires 2 and the noise absorption member 3.

Explanation of Reference Numerals

[0131] 1... Wire harness 2... Electric wire 3... Noise absorption member 3a... Insertion space 4... Fixing part 5... Binding band 31... Core member 51... Band part 52... Lock part G... Gap L... Length of the fixing part W... Length of the noise absorption member X... Front - rear direction

Claims

1. A noise absorption member fixing structure for fixing an annular noise absorption member having an insertion space for inserting a wire and suppressing noise of the wire inserted into the insertion space to the wire, comprising: a fixing portion fixed at a predetermined position in the longitudinal direction of the wire; and an attachment portion for attaching the noise absorption member to the fixing portion, wherein the attachment portion is formed in an elongated shape that passes between the wire and the fixing portion and is wound along the longitudinal direction around the outer peripheral surface of the noise absorption member Noise absorption member fixing structure.

2. The fixing portion is a fixing tape wound around the wire at a predetermined position in the longitudinal direction of the wire The noise absorption member fixing structure according to claim 1.

3. The fixing portion holds a plurality of the wires in a bundled state, and the attachment portion is formed in an elongated shape that is wound around the outer peripheral surface of the noise absorption member through a gap formed by the plurality of wires and the fixing portion The noise absorption member fixing structure according to claim 1.

4. The attachment portion is a binding band having an elongated band portion and a lock portion to which the annularly wound band portion is locked and fixed The noise absorption member fixing structure according to claim 3.

5. The fixing portion is a fixing tape wound around a plurality of the wires at a predetermined position in the longitudinal direction of the wire The noise absorption member fixing structure according to claim 3.

6. The noise absorption member is composed of a plurality of annular bodies juxtaposed in the longitudinal direction, and the length of the fixing portion in the longitudinal direction is the same as the length of the noise absorption member in the longitudinal direction or slightly shorter than the length of the noise absorption member in the longitudinal direction The noise absorption member fixing structure according to claim 3.

7. The noise absorption member is composed of a plurality of annular bodies juxtaposed in the longitudinal direction, and the length of the fixing portion in the longitudinal direction is the same as the length of the noise absorption member in the longitudinal direction or slightly longer than the length of the noise absorption member in the longitudinal direction The noise absorption member fixing structure according to claim 3.

8. The lock portion of the binding band is arranged adjacent to the end face of the noise absorption member in the longitudinal direction of the wire, and the band portion of the binding band is inserted and fixed to the lock portion on the inner peripheral surface side of the noise absorption member rather than the base portion of the band portion The noise absorption member fixing structure according to claim 4.

9. The noise absorption member is composed of a plurality of annular bodies juxtaposed in the longitudinal direction The noise absorption member fixing structure according to claim 1.

10. A plurality of electric wires, an annular noise absorption member having an insertion space through which the plurality of electric wires are inserted and suppressing noise of the electric wires inserted into the insertion space, a fixing portion fixed at a predetermined position in the longitudinal direction of the electric wire, and an attachment portion for attaching the noise absorption member to the fixing portion, wherein the attachment portion is formed in a long shape that is wound around the outer peripheral surface of the noise absorption member through a gap formed by the plurality of electric wires and the fixing portion, the noise absorption member is fixed at a predetermined position in the longitudinal direction of the electric wire by the cooperation of the fixing portion and the attachment portion a wire harness.