JP2022090156A - Electrical wire boot and wire harness - Google Patents

Abstract

To provide an electrical wire boot exhibiting excellent assembling workability to an exterior member.SOLUTION: The electrical wire boot comprises: a boot body 11 formed into a cylindrical shape larger than a cylindrical exterior member 20 for housing a part of an electrical wire We to be protected inside and capable of housing one end 20a of the exterior member 20 inside an inner peripheral wall 11a without contact with the inner peripheral wall 11a; and at least one annular body 12 coaxial to the cylindrical shaft of the boot body 11 projecting from the inner peripheral wall 11a of the boot body 11. The annular body 12 is formed so as to be able to elastically deform an annular part 12a from the origin of the outer peripheral side to the inner peripheral surface to be a cylindrical part 12b coaxial to the cylindrical shaft of the exterior member 20 and bond an inner peripheral wall 12b1 of the cylindrical part 12b to the outer peripheral wall of the exterior member 20 over the entire periphery in the peripheral direction.SELECTED DRAWING: Figure 2

Description

The present invention relates to boots for electric wires and wire harnesses.

Conventionally, in a wire harness, a tubular electric wire boot may be put on the electric wire. The boots for electric wires are for waterproofing and dustproofing the electric wires, and are made of a flexible material such as synthetic rubber. For example, Patent Document 1 below discloses a rubber boot covered with an electric wire.

JP-A-2017-220974

By the way, in a wire harness, in order to prevent interference between the electric wire and peripheral parts, the protected portion of the electric wire may be housed inside a cylindrical exterior member (for example, a corrugated tube). In this wire harness, the outer peripheral wall side of the exterior member and the inner peripheral wall side of the electric wire boots are brought into close contact with each other in the circumferential direction in order to waterproof and dust-proof the electric wires in the exterior member. In this state, the exterior member may be covered with electric wire boots. In this case, in order to improve the adhesion to the exterior member of the electric wire boot, the cross-sectional area of the cross section orthogonal to the cylinder axis direction in the internal space formed by the inner peripheral wall thereof is the outer shell in the cross section orthogonal to the cylinder axis direction of the exterior member. It is molded so that it is smaller than the cross-sectional area inside the line. Therefore, when assembling the boots for electric wires to the exterior member, the flexibility is used to hold the boots in an expanded state so that the cross-sectional area of the internal space is larger than the cross-sectional area of the exterior member. The inner peripheral wall side is brought into close contact with the outer peripheral wall side of the exterior member by inserting it into the exterior member and then shrinking the tube while releasing the holding state. Since the conventional wire harness requires such a pipe expansion work of the electric wire boot, it takes a lot of time and effort to assemble the electric wire boot to the exterior member.

Therefore, an object of the present invention is to provide an electric wire boot and a wire harness having excellent workability for assembling to an exterior member.

In order to achieve the above object, the electric wire boot according to the present invention is formed in a cylindrical shape larger than the tubular exterior member for accommodating the protected portion of the electric wire inward, and is said to be inside the inner peripheral wall thereof. A boot body capable of accommodating one end of the exterior member without contacting the inner peripheral wall, and at least one annular body coaxial with the cylindrical axis of the boot body protruding from the inner peripheral wall of the boot body. The annular body is capable of elastically deforming the annular portion between the starting point on the outer peripheral portion side and the inner peripheral surface into a cylindrical portion coaxial with the cylindrical axis of the exterior member. It is characterized in that the inner peripheral wall of the tubular portion is formed so as to be able to be brought into close contact with the outer peripheral wall of the exterior member over the entire circumference in the circumferential direction.

Further, in order to achieve the above object, the wire harness according to the present invention has an electric wire, a cylindrical exterior member for accommodating a protected portion of the electric wire inward, and one end side on one end side of the exterior member. The electric wire boot is provided with a wire boot that is covered and the other end side is held by the boot holding portion in a state where the gap between the other end side is filled, and the electric wire boot is more than the cylindrical exterior member. A boot body that is formed in a large cylindrical shape and can accommodate the one end portion of the exterior member without contacting the inner peripheral wall inside the inner peripheral wall, and a protrusion from the inner peripheral wall of the boot body. It has at least one annular body coaxial with the cylindrical shaft of the boot body, and the annular body has an annular portion between the starting point on the outer peripheral side and the inner peripheral surface as the cylindrical shaft of the exterior member. It is formed so that it can be elastically deformed into a coaxial tubular portion, and the inner peripheral wall of the tubular portion can be brought into close contact with the outer peripheral wall of the exterior member over the entire circumference in the circumferential direction. It is characterized by that.

Further, in order to achieve the above object, the wire harness according to the present invention has an electric wire, a cylindrical exterior member for accommodating a protected portion of the electric wire inward, and one end side of one end of the exterior member. A first electric wire boot that covers the side and holds the other end side in the first boot holding portion with the gap between the other end side filled, and one end side of the other end portion of the exterior member. The first electric wire boot and the first electric wire boot are provided, and the second electric wire boot is provided, and the other end side is held by the second electric wire holding portion in a state where the gap between the other end side is filled. (2) The electric wire boot is formed in a cylindrical shape larger than the tubular exterior member, and accommodates one end of the exterior member inside the inner peripheral wall without contacting the inner peripheral wall. Each has a boot body capable of being formed and at least one annular body coaxial with the cylindrical axis of the boot body projecting from the inner peripheral wall of the boot body, and the annular body is a starting point on the outer peripheral side. The annular portion between the surface and the inner peripheral surface can be elastically deformed into a tubular portion coaxial with the cylindrical shaft of the exterior member, and the inner peripheral wall of the tubular portion is formed on the outer peripheral wall of the exterior member. It is characterized in that it is formed so that it can be brought into close contact over the entire circumference in the circumferential direction.

In the electric wire boot according to the present invention, the annular gap between the inner peripheral wall of the boot body and the outer peripheral wall of the exterior member can be filled with the annular body. Therefore, since the boots for electric wires do not allow external water and dust to reach the opening at one end of the exterior member, water can enter the exterior member and dust can enter through the opening at one end of the exterior member. Can be deterred. Therefore, the boots for electric wires can ensure waterproof performance and dustproof performance for the electric wires in the boots. Further, the boot body of the electric wire boot is formed in a cylindrical shape larger than the exterior member, and one end of the exterior member can be accommodated inside the inner peripheral wall without contacting the inner peripheral wall. Has been done. Therefore, in this electric wire boot, when the exterior member is housed in the boot body, the exterior member can be inserted into the boot body without expanding the pipe as in the conventional case, so that the exterior member can be inserted into the boot body. Excellent assembly workability. Therefore, the boot for electric wire according to the present invention is excellent in assembling workability to the exterior member while ensuring waterproof performance and dustproof performance for the electric wire in the boot. Further, the wire harness according to the present invention is provided with such boots for electric wires, and can similarly exert the effect obtained by the boots for electric wires.

FIG. 1 is a perspective view showing an electric wire boot and a wire harness according to an embodiment and a modified form thereof. FIG. 2 is a sectional view taken along line XX of FIG. 1 when the boots for electric wires of the embodiment are applied. FIG. 3 is a sectional view taken along line XX of FIG. 1 when a modified form of boots for electric wires is applied. FIG. 4 is an exploded perspective view showing the boots for electric wires and the exterior member before assembly in the embodiment. FIG. 5 is a cross-sectional view taken along the line XX of FIG. FIG. 6 is an exploded perspective view showing an electric wire boot and an exterior member before assembly in a deformed form. FIG. 7 is a cross-sectional view taken along the line XX of FIG. FIG. 8 is a cross-sectional view illustrating one of the specific examples of the wire harness.

Hereinafter, embodiments of the electric wire boot and the wire harness according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

[Embodiment]
Embodiments of the electric wire boot and the wire harness according to the present invention will be described with reference to FIGS. 1 to 8.

Reference numerals 10A in FIGS. 1 and 2 indicate the electric wire boots of the embodiment. Reference numeral 10B in FIGS. 1 and 3 indicates a boot for electric wires in a modified form of the embodiment. However, in the following, when the description is common to the electric wire boots 10A of the embodiment and the electric wire boots 10B of the modified form, reference numeral 10 is used to indicate the electric wire boots. Further, reference numerals WH of FIGS. 1 to 3 indicate an embodiment or a modified wire harness in which the electric wire boot 10A of the embodiment or the electric wire boot 10B of the modified form is provided as one of the components. The wire harness WH includes at least an electric wire We and an exterior member 20 for preventing the electric wire We from interfering with peripheral parts, in addition to the electric wire boot 10A of the embodiment or the electric wire boot 10B of the modified form. There is.

First, the exterior member 20 will be described.

The exterior member 20 is formed into a cylindrical shape with an insulating material such as synthetic resin. The exterior member 20 protects the protected portion of the electric wire We so as not to interfere with peripheral parts by accommodating the protected portion of the electric wire We inside the exterior member 20. In the exterior member 20, the protected portion of one or a plurality of electric wires We is accommodated inward, and the electric wire We is outside from the openings 20a ₁ , 20b ₁ of both ends 20a, 20b in the axial direction of the cylinder. Pull it out toward you (Fig. 2 and Fig. 3).

As the exterior member 20 shown here, a corrugated tube in which the annular crest 21 which becomes a mountain on the outer peripheral wall side and the annular valley portion 22 which becomes a valley on the outer peripheral wall side are alternately arranged in the axial direction is used ( 1 to 7). Here, a cylindrical corrugated tube in which the annular peaks 21 and the annular valleys 22 are alternately arranged is used as the exterior member 20. However, the exterior member 20 may have a tubular shape with no unevenness on the outer peripheral wall (for example, the cross-sectional shape orthogonal to the tubular axis direction is similar to the boot body 11 described later in the electric wire boot 10).

Subsequently, the electric wire boots 10 (electric wire boots 10A and 10B) will be described.

The electric wire boot 10 is molded using synthetic rubber in order to have flexibility and elasticity. The electric wire boot 10 has one end (one end 20a or the other end 20b) of the exterior member 20 inserted into the internal space from the opening 10a ₁ on the one end 10a side (FIGS. 1 to 7). Then, the electric wire boot 10 covers the one end side of the exterior member 20 with the one end 10a side, and the one end 10a side is entirely in the circumferential direction with respect to the one end portion of the exterior member 20 inside the one end 10a side. It is brought into close contact over the circumference (FIGS. 1 to 3). In the electric wire boot 10 shown here, one end of the exterior member 20 is inserted to the other end 10b side (FIGS. 2 and 3).

Further, the electric wire boot 10 is held by the boot holding portion Caa in a state where the other end 10b side is filled with the gap between the other end 10b side and the other end 10b side (FIGS. 2 and 3). The boot holding portion Caa is formed as a part of a housing Ca such as an electric device (auxiliary machine or the like) for electrically connecting the electric wire We or a repeater for electrically connecting the electric wire We to another electric wire We. There is. For example, the boot holding portion Caa accommodates the other end 10b side of the electric wire boot 10, and the outer peripheral wall on the other end 10b side is brought into close contact with the other end 10b side in the circumferential direction over the entire circumference. May be held in a state where the gap between the other end and the other end 10b side is filled. Further, the boot holding portion Caa is covered with the other end 10b side of the electric wire boot 10, and the other end 10b side is brought into close contact with the other end 10b side in the circumferential direction over the entire circumference inside the other end 10b side. The other end 10b side may be held in a state of filling the gap between the other end 10b side.

The electric wire boot 10 has one end 10a in close contact with one end of the exterior member 20 over the entire circumference in the circumferential direction, and one end of another exterior member 20 (one end 20a). Alternatively, the other end 20b) is covered with the other end 10b side, and the other end 10b side is brought into close contact with the other end 10b side in the circumferential direction over the entire circumference on the inner side of the other end 10b side. May be good.

The electric wire boot 10 has a tubular boot body 11 and at least one annular body 12 provided in the boot body 11 (FIGS. 1 to 7). The electric wire boot 10A of the embodiment is exemplified as having one annular body 12. On the other hand, the modified form of the electric wire boot 10B is exemplified as having two annular bodies 12 thereof.

The boot body 11 is formed in a cylindrical shape larger than the exterior member 20. The boot body 11 can accommodate one end (one end 20a or the other end 20b) of the exterior member 20 inside the inner wall 11a without contacting the inner wall 11a. It is formed as a shape (FIGS. 2 and 3). That is, the cross-sectional area of the boot body 11 orthogonal to the cylinder axis direction in the internal space formed by the inner peripheral wall 11a is larger than the cross-sectional area inside the outer shell line in the cross section orthogonal to the cylinder axis direction of the outer peripheral wall of the exterior member 20. Is also formed to be large. In the boot body 11 shown here, the cross-sectional area of the cross section orthogonal to the tubular axis direction in the internal space formed by the inner peripheral wall 11a is a break inside the outer shell line in the cross section orthogonal to the tubular axis direction of the mountain portion 21 of the exterior member 20. It is formed to be larger than the area. The boot body 11 shown here is formed in a cylindrical shape.

The annular body 12 may be provided only in the boot body 11 where at least the exterior member 20 is housed. The electric wire boot 10 shown here is provided with an annular body 12 only on one end 10a side (FIG. 2, FIG. 3, FIG. 5 and FIG. 7).

The annular body 12 is formed in an annular shape coaxial with the tubular shaft of the boot body 11 protruding from the inner peripheral wall 11a of the boot body 11. The annular body 12 has a tubular portion 12b (FIGS. 2 and 3) in which the annular portion 12a (FIGS. 4 to 7) between the starting point on the outer peripheral portion side and the inner peripheral surface is coaxial with the cylindrical shaft of the exterior member 20. It is formed so that it can be elastically deformed and the inner peripheral wall 12b ₁ of the tubular portion 12b can be brought into close contact with the outer peripheral wall of the exterior member 20 over the entire circumference in the circumferential direction. Therefore, the annular body 12 is formed in the annular shape of a flat plate in order to enable such elastic deformation (FIGS. 4 to 7). The annular body 12 has a cross-sectional area orthogonal to the tubular axis direction in the internal space formed by the inner peripheral surface 12a ₁ of the annular portion 12a, and the cross-sectional area of the mountain portion 21 of the exterior member 20 is outside in the orthogonal cross section to the tubular axis direction. It is formed so as to be smaller than the cross-sectional area inside the shell line (FIGS. 5 and 7). That is, when the exterior member 20 is inserted into the boot body 11, the annular body 12 has an annular portion 12a at the end surface of one end portion (one end portion 20a or the other end portion 20b) of the exterior member 20. The annular surface of the above is formed into a shape that is pushed and elastically deformed into the tubular portion 12b. The annular body 12 shown here is formed in an annular shape of a flat plate.

Since the boot 10 for electric wires is provided with such a boot body 11 and an annular body 12, the annular body 12 forms an annular gap between the inner peripheral wall 11a of the boot body 11 and the outer peripheral wall of the exterior member 20. Can be filled. Therefore, in the electric wire boot 10, when at least one annular body 12 is provided in the opening 10a ₁ on the one end 10a side, the inner peripheral wall 11a of the boot body 11 and the exterior member 20 are provided from the opening 10a ₁ on the one end 10a side. It is possible to prevent the intrusion of water and dust from the outside into the space between the outer wall and the outer wall. Further, in the electric wire boot 10, when the annular body 12 is provided deeper than the opening 10a ₁ on the one end 10a side, the inner peripheral wall 11a of the boot body 11 and the exterior member 20 are provided from the opening 10a ₁ on the one end 10a side. The annular body 12 can dam the water and dust that have entered from the outside between the outer peripheral wall and the outer wall. The electric wire boot 10 allows external water and dust to be removed from the exterior member 20 regardless of the arrangement of the annular body 12 (opening 20a ₁ of one end 20a or the other end). Since the opening 20b ₁ ) of the 20b is not reached, it is possible to prevent water from entering the exterior member 20 and dust from entering through the opening at one end of the exterior member 20. Therefore, the electric wire boots 10 can ensure waterproof performance and dustproof performance for the electric wire We in the boots 10.

Specifically, when the corrugated tube is used as the exterior member 20 as in this example, the annular body 12 completely covers the inner peripheral wall 12b ₁ of the tubular portion 12b after elastic deformation with respect to at least one mountain portion 21 in the circumferential direction. It is formed so as to be in close contact with each other over the circumference (FIGS. 2, FIG. 3, FIG. 5 and FIG. 7).

For example, when the tubular portion 12b after elastic deformation is brought into close contact with only one mountain portion 21, the annular body 12 has the mountain portion 21 due to the elastic deformation of the annular portion 12a accompanying the insertion of the exterior member 20. A cylindrical tubular portion 12b is formed in which the inner peripheral wall 12b ₁ is in close contact with the outer peripheral wall (top surface in this example) of the top portion in the circumferential direction over the entire circumference. As a result, the electric wire boot 10 can fill the annular gap between the inner peripheral wall 11a of the boot body 11 and the outer peripheral wall (top surface in this example) of the top of the mountain portion 21 with the annular body 12. , The waterproof performance and dustproof performance shown above can be ensured.

However, in this case, the annular body 12 is in close contact with the inner peripheral wall 12b ₁ of the tubular portion 12b after elastic deformation only with respect to the outer peripheral wall of the top of one mountain portion 21 over the entire circumference in the circumferential direction. When the relative positional relationship of the exterior member 20 in the cylindrical axis direction is displaced, the inner peripheral wall 12b ₁ of the tubular portion 12b is in close contact with the one mountain portion 21 over the entire circumference in the circumferential direction. It may be difficult to make it. Therefore, when the tubular portion 12b after elastic deformation is brought into close contact with only one mountain portion 21, the annular body 12 has the top portion of the mountain portion 21 due to the elastic deformation of the annular portion 12a accompanying the insertion of the exterior member 20. It is possible to form a cylindrical tubular portion 12b in which the inner peripheral wall 12b ₁ is in close contact with the outer peripheral wall (top surface in this example) in the circumferential direction, and in the tubular axial direction. When the relative positional relationship of the exterior member 20 is deviated, the inclined surface connecting the top of the mountain portion 21 and the valley bottom of the valley portion 22 or the boundary portion with the inclined surface at the top of the mountain portion 21. It is desirable that a conical cylindrical portion 12b having an inner peripheral wall 12b ₁ in close contact with the inner peripheral wall 12b 1 is formed so as to be able to be formed. In the annular body 12, when the relative positional relationship of the exterior member 20 in the cylindrical axial direction is displaced, the tubular portion 12b enters the valley portion 22 to form a conical cylindrical shape, and the inside of the tubular portion 12b. The peripheral wall 12b ₁ is brought into close contact with the outer peripheral wall of the mountain portion 21 over the entire circumference in the circumferential direction.

However, in the annular body 12, when the elastic deformation to both the cylindrical cylindrical portion 12b and the conical tubular portion 12b is taken into consideration, the degree of adhesion of the tubular portion 12b to the outer peripheral wall of the mountain portion 21 is high. There is a possibility that the exterior member 20 will vary depending on the relative position, and the waterproof performance and dustproof performance will differ depending on the position.

Therefore, when the corrugated tube is used as the exterior member 20 as in this example, the annular body 12 is elastically deformed with respect to one mountain portion 21 in consideration of the relative positional deviation of the exterior member 20 in the cylindrical axial direction. The inner peripheral wall 12b 1 of the tubular portion 12b of the above is brought into close contact with the inner peripheral wall 12b ₁ in the circumferential direction, and one valley portion 22 adjacent to the mountain portion 21 in the tubular axial direction is completely covered by the tubular portion 12b in the circumferential direction. It is desirable that it be formed as a cover over the circumference (FIG. 2, FIG. 3, FIG. 5 and FIG. 7). As a result, the electric wire boot 10 has an inner peripheral wall 11a of the boot body 11 and an outer peripheral wall of the top of at least one mountain portion 21 regardless of the relative position of the exterior member 20 in the tubular axial direction (in this example, the top). The annular gap between the surface) can be filled with the annular body 12. Therefore, the electric wire boot 10 can secure the waterproof performance and the dustproof performance shown above regardless of the relative position of the exterior member 20 in the tubular axis direction.

The annular body 12 shown here has a tubular shape after elastic deformation with respect to two adjacent mountain portions 21 with one valley portion 22 sandwiched in the tubular axial direction in order to more reliably obtain its waterproof performance and dustproof performance. The inner peripheral wall 12b 1 of the portion 12b is brought into close contact with the inner peripheral wall 12b ₁ in the circumferential direction over the entire circumference (FIGS. 2, FIG. 3, FIG. 5 and FIG. 7).

Here, in this wire harness WH, in order to close the opening 10a ₁ on the one end 10a side of the electric wire boot 10, the outer wall of the exterior member 20 (one end 10a side opening 10a ₁ ) protrudes from the outer wall on the one end 10a side. The tape (not shown) may be wrapped tightly over the outer peripheral wall of the portion. Thereby, in this wire harness WH, higher waterproof performance and dustproof performance can be obtained.

By the way, in the wire harness WH shown so far, by covering one end 20a of the exterior member 20 with the one end 10a side of the electric wire boot 10, the opening 20a ₁ of the one end 20a is blocked from the outside. However, the other end 20b of the exterior member 20 is not mentioned. This is because the opening 20b ₁ of the other end 20b may be shielded from the outside by a wire boot 10 different from one end 20a, and the other end 20b may be housed in a box or the like. This is because it may be blocked from the outside by another method. In the following, as one of the specific examples of the wire harness WH, the former configuration in which the electric wire boot 10A of the embodiment is used is shown (FIG. 8). Here, one electric wire boot 10A is referred to as "first electric wire boot 10A1", and the other electric wire boot 10A is referred to as "second electric wire boot 10A2". Further, here, one boot holding portion Caa for holding the first electric wire boot 10A1 is referred to as a "first boot holding portion" Caa1, and the other boot holding portion for holding the second electric wire boot 10A2. Caa is referred to as "second boot holding portion" Caa2.

The wire harness WH shown here includes an electric wire We, an exterior member 20, a first electric wire boot 10A1 that covers one end 20a side of the exterior member 20 with one end 10a, and the other end 20b of the exterior member 20. A second electric wire boot 10A2 that covers one end 10a side is provided (FIG. 8).

The first electric wire boot 10A1 is the first boot in a state where one end 20a side of the exterior member 20 is covered with one end 10a side and the other end 10b side is filled with a gap between the other end 10b side. It is held by the holding portion Caa1 (FIG. 8). Further, in the second electric wire boot 10A2, the other end portion 20b side of the exterior member 20 is covered with one end 10a side, and the other end 10b side is filled with a gap between the other end portion 10b side. 2 The boot holding portion Caa2 is held (FIG. 8). The first electric wire boot 10A1 and the second electric wire boot 10A2 each have a boot main body 11 shown above and at least one annular body 12 provided on one end 10a side (FIG. 8). The boot 10A1 for the first electric wire and the boot 10A2 for the second electric wire shown here each have a boot main body 11 and one annular body 12 provided on one end 10a side. Each of the annular bodies 12 of the first electric wire boot 10A1 and the second electric wire boot 10A2 is formed to have the same shape as the above example (FIG. 8).

As shown above, in the electric wire boots 10 (electric wire boots 10A and 10B), the annular gap between the inner peripheral wall 11a of the boot body 11 and the outer peripheral wall of the exterior member 20 can be filled with the annular body 12. .. Therefore, the electric wire boot 10 does not allow external water or dust to reach the opening at one end of the exterior member 20 (opening 20a ₁ at one end 20a or opening 20b ₁ at the other end 20b). It is possible to prevent water from entering the exterior member 20 and dust from entering through the opening at one end of the exterior member 20. Therefore, the electric wire boot 10 can secure waterproof performance and dustproof performance for the electric wire We in the boots 10. Further, in the electric wire boots 10 (electric wire boots 10A, 10B), the cross-sectional area of the cross section orthogonal to the tubular axis direction in the internal space formed by the inner peripheral wall 11a of the boot body 11 is the tubular axis direction of the outer peripheral wall of the exterior member 20. It is formed so as to be larger than the cross-sectional area inside the outer shell line in the cross section orthogonal to the above. That is, the boot body 11 is formed in a cylindrical shape larger than the exterior member 20, and is formed so that one end of the exterior member 20 can be accommodated inside the inner peripheral wall 11a without contacting the inner peripheral wall 11a. Has been done. Therefore, in the electric wire boot 10, when the exterior member 20 is housed in the boot body 11, the exterior member 20 can be inserted into the boot body 11 without expanding the pipe as in the conventional case. Therefore, it is excellent in assembling workability to the exterior member 20. Therefore, the electric wire boots 10 (electric wire boots 10A and 10B) are excellent in assembling workability to the exterior member 20 while ensuring waterproof performance and dustproof performance for the electric wire We in the boots 10. .. The electric wire boots 10 contribute to cost reduction because of their simple assembly work.

Further, in the electric wire boot 10, by providing a plurality of annular bodies 12 (for example, by providing two annular bodies 12 as in the modified form of the electric wire boots 10B), the annular body 12 is one embodiment. Compared with the electric wire boot 10A, higher waterproof performance and dustproof performance can be obtained. When a plurality of annular bodies 12 are provided in the electric wire boots 10, each of them is to suppress variation in the degree of adhesion of the tubular portion 12b after elastic deformation to the outer peripheral wall of the exterior member 20 and to improve the adhesion. It is desirable to form an annular body 12 having a shape in which the tubular portions 12b after elastic deformation of the above do not overlap each other. Further, in the electric wire boot 10, when a plurality of annular bodies 12 corresponding to the exterior member 20 as a corrugated tube are provided, all the annular bodies 12 may be formed to have the same shape, and after elastic deformation. An annular body 12 having a different shape of the tubular portion 12b may be mixed, for example, as in the above example.

Further, the wire harness WH is provided with such electric wire boots 10 (electric wire boots 10A, 10B), and similarly exhibits the effect that the electric wire boots 10 (electric wire boots 10A, 10B) can be obtained. be able to.

10, 10A, 10B Electric wire boots 10A1 1st electric wire boots 10A2 2nd electric wire boots 10a One end 10b Other end 11 Boot body 11a Inner peripheral wall 12 Ring body 12a Circular part 12b Cylindrical part 12b ₁ Inner peripheral wall 20 Exterior member 20a One side End (one end)
20b The other end (one end)
21 Yamabe 22 Tanibe Caa Boot holding part Caa1 1st boot holding part Caa2 2nd boot holding part We Electric wire WH Wire harness

Claims (5)

It is formed in a cylindrical shape larger than the tubular exterior member that accommodates the protected portion of the electric wire inward, and one end of the exterior member is accommodated inside the inner peripheral wall without contacting the inner peripheral wall. With the boot body that can be
At least one annular body coaxial with the tubular axis of the boot body, which is projected from the inner peripheral wall of the boot body.
Have,
In the annular body, the annular portion between the starting point on the outer peripheral portion side and the inner peripheral surface can be elastically deformed into a tubular portion coaxial with the cylindrical axis of the exterior member, and the outer circumference of the exterior member. A boot for electric wires characterized in that the inner peripheral wall of the tubular portion is formed so as to be able to be brought into close contact with the wall over the entire circumference in the circumferential direction. The annular body uses, as the exterior member, a corrugated tube in which an annular crest that forms a mountain on the outer peripheral wall side and an annular valley that forms a valley on the outer peripheral wall side are alternately arranged in a cylindrical axial direction. The case according to claim 1, wherein the inner peripheral wall of the tubular portion after elastic deformation is formed so as to be in close contact with at least one mountain portion over the entire circumference in the circumferential direction. Boots for electric wires. The annular body uses, as the exterior member, a corrugated tube in which an annular crest that forms a mountain on the outer peripheral wall side and an annular valley that forms a valley on the outer peripheral wall side are alternately arranged in a cylindrical axial direction. In the case, the inner peripheral wall of the tubular portion after elastic deformation is brought into close contact with the mountain portion over the entire circumference in the circumferential direction, and the valley adjacent to the mountain portion in the cylindrical axial direction. The electric wire boot according to claim 1, wherein the tubular portion is formed so as to cover the entire circumference in the circumferential direction. With electric wires
A cylindrical exterior member that accommodates the protected portion of the electric wire inward, and
An electric wire boot that covers one end side of the exterior member and holds the other end side in the boot holding portion with the gap between the other end side filled.
Equipped with
The electric wire boot is formed in a cylindrical shape larger than the tubular exterior member, and can accommodate the one end portion of the exterior member inside the inner peripheral wall without contacting the inner peripheral wall. A boot body and at least one annular body coaxial with the cylindrical axis of the boot body projecting from the inner peripheral wall of the boot body.
In the annular body, the annular portion between the starting point on the outer peripheral portion side and the inner peripheral surface can be elastically deformed into a tubular portion coaxial with the cylindrical axis of the exterior member, and the outer circumference of the exterior member. A wire harness characterized in that it is formed so that the inner peripheral wall of the tubular portion can be brought into close contact with the wall over the entire circumference in the circumferential direction. With electric wires
A cylindrical exterior member that accommodates the protected portion of the electric wire inward, and
A boot for a first electric wire, which covers one end side of the exterior member with one end side and holds the other end side in the first boot holding portion with the gap between the other end side filled.
A boot for a second electric wire, which covers the other end of the exterior member with one end and holds the other end in the second boot holding portion with the gap between the other end filled.
Equipped with
The boots for the first electric wire and the boots for the second electric wire are formed in a cylindrical shape larger than the tubular exterior member, and the outer peripheral member thereof is formed inside the inner peripheral wall without contacting the inner peripheral wall. Each has a boot body capable of accommodating the one end and at least one annular body coaxial with the cylindrical axis of the boot body projecting from the inner peripheral wall of the boot body.
In the annular body, the annular portion between the starting point on the outer peripheral portion side and the inner peripheral surface can be elastically deformed into a tubular portion coaxial with the cylindrical axis of the exterior member, and the outer circumference of the exterior member. A wire harness characterized in that it is formed so that the inner peripheral wall of the tubular portion can be brought into close contact with the wall over the entire circumference in the circumferential direction.

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