wire harness

Abstract

A wire harness (10) according to one embodiment of the present disclosure includes: an electric wire member (20); a tubular outer cover member (30) that covers an outer periphery of the electric wire member (20); and a path restriction member (40) that covers a portion of a circumferential direction of the outer cover member (30) in the outer periphery of the outer cover member (30) and extends in a length direction of the outer cover member (30) to restrict a path in which the electric wire member (20) is routed. The path restriction member (40) has: an insertion opening (44) that is open in a direction orthogonal to the length direction of the path restriction member (40) and extends throughout the length direction, and is configured to be able to insert the outer cover member (30) into the insertion opening (44); a first end portion (41) and a second end portion (42) that are located opposite each other in the circumferential direction and form the insertion opening (44); and a first protruding portion (45) that protrudes from an inner surface of at least one of the first end portion (41) and the second end portion (42) toward the outer cover member (30) to contact an outer surface of the outer cover member (30).

Description

Technical Field

[0001] This disclosure relates to wire harnesses. Background Technology

[0002] Conventionally, wire harnesses are known to include a corrugated tube that covers the outer periphery of the wire member and a path limiting member that covers a portion of the circumferential direction of the corrugated tube and limits the path of the wire member (see, for example, Patent Document 1).

[0003] Patent Document 1 describes a wire harness with a corrugated tube having a slit formed along its length. The path limiting member includes a path maintaining member disposed along the outer periphery of the corrugated tube and an assembly member disposed within the slit. The assembly member is configured to engage with both the inner periphery of the slit and the outer periphery of the path maintaining member. By securing the corrugated tube, the path maintaining member, and the assembly member using a band wrapping or similar method, the path of the wire component can be limited.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2013-55760 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] However, in the wire harness described in Patent Document 1, the assembly component is disposed within the slit of the bellows. Therefore, a gap may occur between the assembly component and the slit. Such a gap is not preferable in improving the waterproofing of the wire harness.

[0009] The purpose of this disclosure is to provide a wire harness that can suppress the reduction of water-tightness.

[0010] Solution for solving the problem

[0011] The wire harness disclosed herein comprises: a wire member; a cylindrical outer member covering the outer periphery of the wire member; and a path limiting member covering a circumferential portion of the outer member in the outer periphery and extending along the length direction of the outer member to limit the path of the wire member, the path limiting member having: an insertion port opening in a direction orthogonal to the length direction of the path limiting member and extending throughout the length direction, configured such that the outer member can be inserted into the insertion port; a first end and a second end located opposite each other in the circumferential direction of the path limiting member to form the insertion port; and a protrusion protruding from the inner surface of at least one of the first end and the second end toward the outer member and contacting the outer surface of the outer member.

[0012] Invention Effects

[0013] According to this disclosure, it is possible to suppress the reduction of the water-tightness of the wire harness. Attached Figure Description

[0014] Figure 1 This is a schematic structural diagram illustrating a wire harness according to one embodiment.

[0015] Figure 2 This is a cross-sectional view showing a wire harness according to one embodiment.

[0016] Figure 3 This is an exploded perspective view showing the outer components and path limiting components of a wiring harness according to one embodiment.

[0017] Figure 4 This is a front view illustrating a path restriction component according to one embodiment.

[0018] Figure 5 This is the front view of the path-limiting component showing a variation.

[0019] Figure 6 This is the front view of the path-limiting component showing a variation.

[0020] Figure 7 This is the front view of the path-limiting component showing a variation.

[0021] Figure 8 This is the front view of the path-limiting component showing a variation.

[0022] Figure 9 This is a cross-sectional view showing a modified example of a path-limiting member.

[0023] Figure 10 This is a cross-sectional view showing a modified example of the wire harness.

[0024] Figure 11 This is a cross-sectional view showing a modified example of the wire harness. Detailed Implementation

[0025] [Description of embodiments of this disclosure]

[0026] First, embodiments of this disclosure will be described.

[0027] [1] The wire harness disclosed herein comprises: a wire member; a cylindrical outer member covering the outer periphery of the wire member; and a path limiting member covering a portion of the circumferential direction of the outer member and extending along the length direction of the outer member to limit the path of the wire member, the path limiting member having: an insertion port opening in a direction orthogonal to the length direction of the path limiting member and extending throughout the length direction, configured such that the outer member can be inserted into the insertion port; a first end and a second end located opposite each other in the circumferential direction of the path limiting member to form the insertion port; and a protrusion protruding from the inner surface of at least one of the first end and the second end toward the outer member and contacting the outer surface of the outer member.

[0028] According to this structure, the path limiting member can be subsequently installed onto the outer periphery of the outer component through the insertion port. Because the path limiting member has a protrusion that extends from the inner surface of at least one of the first and second ends and contacts the outer surface of the outer component, it can prevent the path limiting member from detaching from the outer component through the insertion port. Therefore, in terms of limiting the path of the wire component covered by the outer component, it is not necessary to form a slit in the outer component for assembling the path limiting member. Therefore, it is possible to prevent a decrease in the water-tightness of the wire harness.

[0029] [2] Preferably, the protrusion extends in the length direction of the path limiting member.

[0030] This structure improves the bending stiffness of the path-limiting member. Furthermore, according to this structure, the protrusion contacts the outer surface of the outer component over a wide range along the length of the path-limiting member. Therefore, it can prevent the path-limiting member from detaching from the outer component through the insertion port over a wide range.

[0031] [3] Preferably, the protrusion extends throughout the length direction of the path limiting member.

[0032] According to this structure, the protrusion, extending along the entire length of the path-limiting member, contacts the outer surface of the outer component. Therefore, it can prevent the path-limiting member from detaching from the outer component through the insertion port, extending along the entire length of the path-limiting member.

[0033] [4] Preferably, the protrusion protrudes from the inner surface of the first end and the inner surface of the second end.

[0034] According to this structure, since protrusions are provided on both sides of the insertion port in the circumferential direction of the path limiting member, the path limiting member can be further prevented from detaching from the outer component through the insertion port.

[0035] [5] Preferably, when the protrusion is designated as the first protrusion, the path limiting member has: a connecting portion connecting the first end and the second end; and a second protrusion protruding from the inner surface of the connecting portion toward the outer component and contacting the outer surface of the outer component.

[0036] According to this structure, because the path limiting member has a second protrusion, both the first and second protrusions are in contact with the outer surface of the outer component. Therefore, the swaying of the path limiting member relative to the outer component can be suppressed.

[0037] [6] Preferably, the second protrusion extends in the length direction of the path limiting member.

[0038] This structure improves the bending stiffness of the path-limiting member. Furthermore, according to the aforementioned structure, the second protrusion contacts the outer surface of the outer component over a wide range along the length of the path-limiting member. Therefore, it can suppress swaying of the path-limiting member relative to the outer component over a wide range.

[0039] [7] Preferably, the second protrusion extends throughout the length direction of the path limiting member.

[0040] According to this structure, the second protrusion, extending along the entire length of the path-limiting member, contacts the outer surface of the outer component. Therefore, it can suppress the swaying of the path-limiting member relative to the outer component throughout its entire length.

[0041] [8] Preferably, the path limiting member has a groove, which is disposed on the outer surface of the portion of the connecting portion where the second protrusion is disposed, and extends along the second protrusion throughout the length direction of the path limiting member.

[0042] According to this structure, compared to the case without the groove, the thickness of the portion of the connecting part with the second protrusion is reduced. Therefore, the connecting part can easily deform outwards from the groove, thus easily expanding the insertion port. Consequently, it is easier to insert the outer component into the path-limiting component through the insertion port.

[0043] [9] Preferably, the protrusion protrudes from the inner surface of at least one of the top end of the first end and the top end of the second end.

[0044] According to this structure, for example, compared to the case where the protrusion protrudes from the inner surface at a position slightly away from the top of the first end and the top of the second end, the path limiting member can be more effectively prevented from detaching from the outer component through the insertion port.

[0045]

[10] Preferably, when viewed from the length direction of the path limiting member, the top ends of the first end and the second end are bent.

[0046] According to this structure, because the tips of the first end and the second end are curved when viewed from the length direction of the path limiting member, the outer component can be smoothly inserted into the interior of the path limiting member. Furthermore, the outer component is less likely to be damaged when inserted into the path limiting member.

[0047]

[11] Preferably, the protrusion is made of a material that is softer than other parts of the path limiting member.

[0048] According to this structure, because the protrusion is made of a material that is softer than other parts of the path-limiting member, the protrusion can easily adhere tightly to the outer component. Therefore, it can better prevent the path-limiting member from detaching from the outer component.

[0049]

[12] Preferably, the path limiting member is made of metal, and the protrusion is formed by bending.

[0050] According to this structure, because the path limiting member is made of metal, it can suppress the rise in internal temperature of external components and consequently, the temperature of wiring components, even when positioned close to a heat source in the vehicle. Furthermore, because the protrusion is formed by bending, the path limiting member with the protrusion can be easily manufactured from sheet metal, for example.

[0051]

[13] Preferably, the outer component is formed in a flat shape and the path limiting component is formed in a flat shape along the outer periphery of the outer component.

[0052] According to this structure, the above-mentioned effects can be achieved in a structure in which the external components and path-limiting components form a flat shape.

[0053]

[14] Preferably, when the direction orthogonal to the length direction of the path limiting member is designated as the first direction, and the direction orthogonal to the length direction of the path limiting member and the first direction is designated as the second direction, the size of the path limiting member in the first direction is longer than the size of the path limiting member in the second direction, and the insertion port opens in the first direction.

[0054] According to this structure, because the insertion port is open in the first direction, the size of the path limiting member in the second direction can be shortened compared to a structure with an opening in the second direction. Furthermore, compared to a structure with an opening in the second direction, it becomes a structure where the insertion port can be easily enlarged, making it easier to subsequently install the path limiting member onto the outer component through the insertion port.

[0055]

[15] Preferably, when the direction orthogonal to the length direction of the path limiting member is designated as the first direction, and the direction orthogonal to the length direction of the path limiting member and the first direction is designated as the second direction, the size of the path limiting member in the first direction is longer than the size of the path limiting member in the second direction, and the insertion port opens in the second direction.

[0056] According to this structure, since the insertion port opens in the second direction, the size of the path-limiting member in the first direction can be shortened compared to a structure that opens in the first direction. Furthermore, in cases where the wiring harness is laid out by passing under the floor of a vehicle, for example, by setting the opening direction of the insertion port to the opposite direction of gravity, it is possible to prevent external components from falling off the path-limiting member and to properly lay out the wiring harness.

[0057]

[16] Preferably, the outer casing is a flexible, circumferentially integral, and sealed corrugated pipe.

[0058] This structure allows the outer casing to deform according to the wiring path. Furthermore, because the outer casing is circumferentially sealed, its waterproofing is improved. Therefore, it achieves a balance between improved wiring harness layout and enhanced waterproofing.

[0059] [Details of the embodiments of this disclosure]

[0060] Specific examples of the wiring harnesses of this disclosure are described below with reference to the accompanying drawings. In the drawings, for ease of explanation, sometimes a portion of the structure is shown enlarged or simplified. Additionally, the dimensional ratios of the various parts sometimes differ in the drawings. Furthermore, this disclosure is not limited to these examples, but is intended by the claims to include all modifications within the meaning and scope equivalent to the claims. The term "orthogonal" in this specification includes not only strictly orthogonal cases, but also cases that are substantially orthogonal to the extent that they achieve the desired effect in this embodiment.

[0061] (Overall structure of wire harness 10)

[0062] Figure 1 The wiring harness 10 shown connects two or more electrical devices. For example, the wiring harness 10 connects an inverter 11 located at the front of a vehicle V, such as a hybrid vehicle or electric vehicle, to a high-voltage battery 12 located at the rear of the vehicle V, closer to the inverter 11. The wiring harness 10 is laid out, for example, passing under the floor of the vehicle V. For instance, the middle portion of the wiring harness 10 along its length is laid out outside the vehicle compartment, such as under the floor of the vehicle V.

[0063] Inverter 11 is connected, for example, to an electric motor (not shown) that powers the drive wheels of the vehicle. Inverter 11 generates alternating current from the direct current (DC) of high-voltage battery 12 and supplies this AC power to the electric motor. High-voltage battery 12 is, for example, a battery capable of supplying several hundred volts.

[0064] like Figure 1 and Figure 2 As shown, the wiring harness 10 includes: a wire member 20 for electrically connecting the aforementioned electrical devices to each other; a cylindrical outer member 30 for covering the outer periphery of the wire member 20; and a path limiting member 40 for covering the outer periphery of the outer member 30 and limiting the path of the wire member 20 (hereinafter referred to as the laying path). A pair of connectors C1 and C2 are fitted at both ends of the wire member 20.

[0065] (Structure of electrical component 20)

[0066] The wiring component 20 has one or more wires 21 and a braided component 24 that covers the outer circumference of each wire 21. In this embodiment, the wiring component 20 has two wires 21. One end of the wiring component 20 is connected to the inverter 11 via connector C1, and the other end is connected to the high-voltage battery 12 via connector C2. The wiring component 20 is, for example, formed in an elongated shape extending in the longitudinal direction of the vehicle. The wires 21 are, for example, high-voltage wires capable of handling high voltage and high current. The wires 21 can be, for example, unshielded wires without electromagnetic shielding or shielded wires with electromagnetic shielding.

[0067] (Structure of wire 21)

[0068] like Figure 2 As shown, the wire 21 is a sheathed wire having a core wire 22 made of conductor and an insulating sheath 23 covering the outer periphery of the core wire 22.

[0069] (Structure of core wire 22)

[0070] As the core wire 22, for example, a stranded wire formed by twisting multiple metal wires together, a cylindrical conductor formed by a single metal rod with a solid internal structure, or a cylindrical conductor with a hollow internal structure can be used. Furthermore, the core wire 22 can also be a combination of various conductors such as stranded wire, cylindrical conductor, and tubular conductor. Examples of cylindrical conductors include single-core wires and busbars. In this embodiment, the core wire 22 is a stranded wire. As the material for the core wire 22, for example, copper-based or aluminum-based metal materials can be used.

[0071] The cross-sectional shape (hereinafter referred to as the cross-sectional shape) of the core wire 22, which is cut by a plane orthogonal to the length direction of the core wire 22, i.e., the length direction of the wire 21, can be set to any shape. The cross-sectional shape of the core wire 22 can be formed as a circle, a semi-circle, a polygon, a square, a flat shape, etc. In this embodiment, the cross-sectional shape of the core wire 22 is formed as a circle.

[0072] In this specification, "flat shape" includes, for example, rectangles, ovals, and ellipses. Additionally, "rectangle" in this specification refers to a rectangle with a long side and a short side, excluding squares. Furthermore, "rectangle" in this specification also includes shapes with chamfered edges and shapes that round off the edges. "Olive" in this specification is a shape composed of two parallel lines of approximately equal length and two semicircles.

[0073] (Structure of the insulating covering part 23)

[0074] The insulating covering portion 23 covers the entire circumference of the outer periphery of the core wire 22, for example. The insulating covering portion 23 is made of an insulating material such as synthetic resin. For example, a synthetic resin with cross-linked polyethylene, cross-linked polypropylene, or other polyolefin resins as its main component can be used as the material for the insulating covering portion 23. Furthermore, a single material can be used as the material for the insulating covering portion 23, or two or more materials can be appropriately combined.

[0075] (Structure of braided component 24)

[0076] The braided member 24 is, for example, formed in a cylindrical shape that covers the outer periphery of each wire 21. The braided member 24 is provided in such a way that it covers the outer periphery of each wire 21 substantially throughout its length. As the braided member 24, a braided wire made of multiple metal wires or a braided wire made by combining metal wires and resin wires can be used. For example, copper-based or aluminum-based metals can be used as the material for the metal wires. For example, para-aramid fibers with excellent insulation and shear resistance can be used as the resin wires. (Illustrations omitted, but the braided member 24 is grounded in each connector C1, C2, etc.)

[0077] (Structure of external component 30)

[0078] like Figure 3 As shown, the outer casing 30 is formed into a cylindrical shape that covers the entire circumference of the wire component 20. The outer casing 30 is completely sealed throughout the circumference. For example, the outer casing 30 is provided in a manner that covers a portion of the outer circumference of the wire component 20 along its length. In this embodiment, the outer casing 30 is a corrugated tube having a corrugated structure in which annular protrusions 31 and annular recesses 32 are alternately and continuously provided along its length. The outer casing 30 is flexible.

[0079] The material used for the outer component 30 can be a conductive resin material or a non-conductive resin material. For example, synthetic resins such as polyolefins, polyamides, polyesters, and ABS resins can be used as resin materials.

[0080] (Structure of path restriction component 40)

[0081] like Figure 2 and Figure 3 As shown, the path limiting member 40 covers a portion of the circumferential direction of the outer peripheral surface of the outer component 30 and extends along the length direction of the outer component 30. Furthermore, the path limiting member 40 covers more than half of the outer periphery of the outer component 30. In this embodiment, the path limiting member 40 is, for example, fitted to the outer periphery of a linearly extending portion of the outer component 30 in the wiring path of the wire component 20, or under the floor of the vehicle V.

[0082] The path limiting member 40 can be made of synthetic resins such as polypropylene, polyamide, and polyoxymethylene. The path limiting member 40 can be manufactured by known manufacturing methods such as extrusion molding and injection molding.

[0083] The path limiting member 40 has: an insertion port 44, which opens in a direction orthogonal to the length direction of the path limiting member 40; a first end 41 and a second end 42 forming the insertion port 44; and a connecting portion 43 connecting the first end 41 and the second end 42. In other words, the path limiting member 40 has: a connecting portion 43 formed in such a way as to cover a portion of the circumferential direction of the outer member 30; a first end 41 and a second end 42 provided at both ends of the connecting portion 43; and an insertion port 44 formed through the first end 41 and the second end 42.

[0084] The first end 41 and the second end 42 are located opposite each other in the circumferential direction of the path limiting member 40. The first end 41 and the second end 42 are separated from each other in the circumferential direction of the path limiting member 40 by the insertion port 44.

[0085] The cross-sectional shapes of the first end 41, the second end 42, and the connecting portion 43 form an arc shape centered on the central axis C. Therefore, the cross-sectional shape of the path limiting member 40 is generally C-shaped. The cross-sectional shape of the path limiting member 40 is the same throughout its length direction.

[0086] In the following description, the direction in which the central axis C of the path limiting member 40 extends is referred to only as the "length direction", and the circumferential direction of the path limiting member 40 centered on the central axis C is referred to only as the "circumferential direction".

[0087] The insertion port 44 extends along the entire length direction. The opening width of the insertion port 44, i.e., the shortest distance between the first end 41 and the second end 42, is less than the outer diameter of the outer component 30.

[0088] By inserting the outer component 30 into the insertion port 44 from a direction orthogonal to the length direction, the path limiting member 40 elastically deforms, increasing the opening width of the insertion port 44. When the outer component 30 moves into the path limiting member 40, the path limiting member 40 elastically recovers its original shape (also referred to as the natural shape, natural state, or inelastic deformation state of the path limiting member 40). Thus, the opening width returns to its original width, and the path limiting member 40 is fitted onto the outer component 30. However, when the outer component 30 is inserted into the path limiting member 40, the opening width may not strictly return to its original width. Because the elastic deformation of the path limiting member 40 to return to its original shape is hindered by the outer component 30, the opening width may sometimes become slightly larger than its original width. Furthermore, when the outer component 30 is inserted into the path limiting member 40, the outer component 30 may become flexed, and the opening width may sometimes return to its original width. That is, the opening width in the state where the outer component 30 is inserted into the path limiting component 40 becomes a size based on the rigidity, flexibility, etc., of the outer component 30 and the path limiting component 40. Furthermore, in Figure 2 The diagram does not strictly illustrate the bending state of the outer component 30 and the path limiting component 40 when the outer component 30 is inserted into the path limiting component 40, but rather schematically illustrates the state of the outer component 30 and the path limiting component 40.

[0089] In the following description, such as Figure 4 As shown, in the main view orthogonal to the length direction, the tangent passing through the first end 41 of the central axis C is designated as tangent T1, and the tangent passing through the second end 42 of the central axis C is designated as tangent T2. Furthermore, in the aforementioned main view, the axis that bisects the opening width of the insertion port 44 and passes through the central axis C is designated as axis L1, and the axis orthogonal to axis L1 and passing through the central axis C is designated as axis L2.

[0090] Regarding the assembly path restriction member 40 of the external component 30 in this embodiment, the opening angle θ of the insertion port 44 is preferably in the range of 60° to 120°. In this embodiment, the opening angle θ is 90°. In this specification, "opening angle θ" in the above-described main view is the angle formed by tangents T1 and T2.

[0091] In this embodiment, the first end portion 41 and the second end portion 42 are portions of the path limiting member 40 that, in the direction extending along axis L1 as described in the main view, are located on the side closer to the insertion port 44 than axis L2. The connecting portion 43 is a portion of the path limiting member 40 that, in the direction extending along axis L1 as described in the main view, is located on the side farther away from the insertion port 44 than axis L2.

[0092] like Figures 2-4 As shown, the path limiting member 40 has a pair of first protrusions 45 that protrude toward the outer member 30 and contact the outer surface of the outer member 30, more specifically, the outer surface of the annular protrusion 31. One of the pair of first protrusions 45 protrudes from the inner surface of the first end 41. The other of the pair of first protrusions 45 protrudes from the inner surface of the second end 42. The cross-sectional shape of the first protrusion 45 is, for example, semi-circular. Each first protrusion 45 extends integrally along the length direction of the path limiting member 40.

[0093] Each first protrusion 45 is positioned circumferentially further away from the insertion port 44 than the tip 51 of the first end 41 and the tip 52 of the second end 42. Viewed along the length of the path-limiting member 40, the tips 51 of the first end 41 and the tip 52 of the second end 42 are curved. In other words, the cross-sectional shape of the tips 51 of the first end 41 and the tip 52 of the second end 42 is curved. More specifically, the cross-sectional shape of the tips 51 of the first end 41 and the tip 52 of the second end 42 is semi-circular.

[0094] The path limiting member 40 has a pair of second protrusions 46 that protrude toward the outer member 30 and contact the outer surface of the outer member 30, more specifically, the outer surface of the annular protrusion 31. Each second protrusion 46 protrudes from the inner surface of the connecting portion 43. The second protrusions 46 are spaced apart from each other in the circumferential direction. The cross-sectional shape of the second protrusion 46 is, for example, semi-circular. The second protrusions 46 extend integrally along the length direction of the path limiting member 40.

[0095] like Figure 4 As shown, a first protrusion 45 and a second protrusion 46 located at the first end 41 are radially opposed to each other on the path limiting member 40. More specifically, these first protrusions 45 and second protrusions 46 are located on opposite sides of each other across the aforementioned central axis C. Furthermore, a first protrusion 45 and a second protrusion 46 located at the second end 42 are radially opposed to each other. More specifically, these first protrusions 45 and second protrusions 46 are located on opposite sides of each other across the aforementioned central axis C.

[0096] The protrusion amount of each first protrusion 45, measured from the inner surface of the first end 41 and the inner surface of the second end 42, and the protrusion amount of each second protrusion 46, measured from the inner surface of the connecting portion 43, are the same. The first protrusion 45 and the second protrusion 46 are located on the same virtual circle VC centered on the central axis C. Figure 4 The virtual circle VC shown is the circle connecting the protruding ends of the first protrusion 45 and the second protrusion 46 to each other. Furthermore, Figure 4 The path limiting member 40 is shown in its natural state (path limiting member 40) without being assembled to the outer component 30 and without elastic deformation.

[0097] In this embodiment, the path limiting member 40 presses against the outer surface of the outer member 30 using the first protrusions 45 and the second protrusions 46. This suppresses movement of the path limiting member 40 relative to the outer member 30 in the longitudinal direction. In this embodiment, the diameter of the virtual circle VC is smaller than the diameter of the outer member 30 in order to press against the outer surface of the outer member 30 using the first protrusions 45 and the second protrusions 46.

[0098] like Figure 2 As shown, because each of the first protrusions 45 and each of the second protrusions 46 is in contact with the outer surface of the outer component 30, gaps are generated between the inner surfaces of the first end 41, the second end 42, and the connecting portion 43 and the outer surface of the outer component 30. These gaps are generated throughout the entire length direction of the path limiting component 40.

[0099] like Figure 3 and Figure 4 As shown, the path limiting member 40 has a pair of grooves 47, which are disposed on the outer surface of the portion of the connecting portion 43 where each second protrusion 46 is provided. Each groove 47 extends integrally along the second protrusion 46, that is, along the length direction of the path limiting member 40. The cross-sectional shape of the groove 47 is, for example, semi-circular.

[0100] The thickness t1 of the portion of the connecting part 43 in which the groove 47 is provided is approximately the same as the thickness t2 of the other portions of the connecting part 43. Furthermore, the thickness t1 can be either greater than or less than the thickness t2.

[0101] The function of this embodiment will be explained.

[0102] According to the wiring harness 10 of this embodiment, the path limiting member 40 can be subsequently installed on the outer periphery of the outer member 30 through the insertion port 44. Because the path limiting member 40 has a pair of first protrusions 45 that contact the outer surface of the outer member 30, it can prevent the path limiting member 40 from detaching from the outer member 30 through the insertion port 44. Therefore, in terms of limiting the path of the wire member 20 covered by the outer member 30, it is not necessary to form, for example, a slit in the outer member 30 for assembling the path limiting member 40 into the outer member 30.

[0103] The effects of this implementation method will be explained.

[0104] (1) The path limiting member 40 has a pair of first protrusions 45 protruding from the inner surface of the first end 41 and the inner surface of the second end 42, respectively. With such a structure, the above-mentioned functions can be achieved, namely, the path limiting member 40 can be prevented from detaching from the outer member 30 and the slit in the outer member 30 can be avoided, so the water-stopping performance of the wire harness 10 can be suppressed.

[0105] (2) The first protrusion 45 extends integrally along the length of the path limiting member 40. This structure improves the bending rigidity of the path limiting member 40. Furthermore, the first protrusion 45 contacts the outer surface of the outer member 30 integrally along the length of the path limiting member 40. Therefore, the path limiting member 40 can be prevented from detaching from the outer member 30 through the insertion port 44 throughout its entire length.

[0106] (3) The path limiting member 40 has a pair of second protrusions 46 protruding from the inner surface of the connecting portion 43. With this structure, both the first protrusion 45 and the second protrusion 46 are in contact with the outer surface of the outer member 30. Therefore, the wobbling of the path limiting member 40 relative to the outer member 30 can be suppressed.

[0107] (4) The second protrusion 46 extends integrally along the length of the path limiting member 40. This structure improves the bending rigidity of the path limiting member 40. Furthermore, the second protrusion 46 contacts the outer surface of the outer member 30 integrally along the length of the path limiting member 40. Therefore, the swaying of the path limiting member 40 relative to the outer member 30 can be suppressed by extending integrally along the length of the path limiting member 40.

[0108] (5) The cross-sectional shape of the path limiting member 40 is the same throughout the length direction of the path limiting member 40. Based on this structure, the path limiting member 40 can be easily manufactured by using an extrusion molding machine that extrudes the raw material of the path limiting member 40 in the length direction. In addition, a variety of path limiting members 40 with different dimensions in the length direction can be manufactured using a single extrusion molding machine.

[0109] (6) The path limiting member 40 has a groove 47 that extends integrally along the second protrusion 46 throughout the length direction of the path limiting member 40. According to this structure, compared to the case where the groove 47 is not provided, the thickness t1 of the portion of the connecting portion 43 where the second protrusion 46 is provided is smaller. Therefore, the connecting portion 43 can easily deform outward from the groove 47, thereby easily enlarging the insertion port 44. Thus, it is easy to insert the outer member 30 into the interior of the path limiting member 40 through the insertion port 44.

[0110] (7) The outer component 30 is a corrugated pipe. With this structure, the outer component 30 can be deformed according to the laying path of the wire component 20. In addition, since the outer component 30 is sealed throughout the circumference, the water-stopping performance of the outer component 30 can be improved. Therefore, it is possible to achieve both improved laying performance and improved water-stopping performance in the wire harness 10.

[0111] (8) Viewed from the length direction of the path limiting member 40, the top end 51 of the first end 41 and the top end 52 of the second end 42 are curved, so that the outer member 30 can be smoothly inserted into the interior of the path limiting member 40. In addition, the outer member 30 is not easily damaged when it is inserted into the interior of the path limiting member 40.

[0112] <Variation Example>

[0113] This embodiment can be implemented with the following modifications. This embodiment and the following variations can be combined with each other within the scope of technical inconsistency.

[0114] The outer component 30 can also be a component with a metal layer containing a metallic material on the outer surface of the bellows. Such a metal layer can be applied, for example, by electroplating. The metal layer is preferably applied to the entire outer surface of the annular protrusion 31 and annular recess 32 of the bellows. The outermost surface of the metal layer is preferably made of a metal material with low emissivity, such as aluminum. With this structure, for example, the internal temperature of the outer component 30, and consequently the temperature of the wiring component 20, can be suppressed from rising due to radiation from the heat source of the vehicle.

[0115] The outer component 30 can also be a component having a slit extending along its length. In this case, the outer component 30 can be sealed circumferentially by wrapping a tape around its outer periphery, for example, to completely block the slit along its length. This prevents a decrease in the water-tightness of the outer component 30 with the slit.

[0116] At least one of the grooves 47 can be omitted.

[0117] The first protrusion 45 and the second protrusion 46 may not be protrusions that extend integrally along the length of the path limiting member 40. For example, the first protrusion 45 and the second protrusion 46 may be protrusions that extend only a portion of the length of the path limiting member 40, or they may be protrusions that extend only a portion of the circumferential direction of the path limiting member 40. Furthermore, the first protrusion 45 and the second protrusion 46 may, for example, be hemispherical protrusions.

[0118] • The number of the first protrusion 45 and the second protrusion 46 can be appropriately changed. For example, multiple first protrusions 45 can be provided at intervals in the longitudinal or circumferential direction, and multiple second protrusions 46 can be provided at intervals in the longitudinal direction.

[0119] • The positions of the first protrusion 45 and the second protrusion 46 can be appropriately changed. For example, each of the first protrusions 45 may be a protrusion that protrudes from the top of the first end 41 and the second end 42. In addition, the first protrusion 45 and the second protrusion 46 may be located on opposite sides of each other without being separated by the central axis C.

[0120] • The second protrusion 46 can also be omitted. In this case, the outer surface of the outer component 30 can contact the inner surfaces of the first protrusion 45 and the connecting portion 43.

[0121] For example Figure 6 As shown, the path limiting member 40 can also be modified to not have a second protrusion 46 protruding from the connecting portion 43, and the cross-sectional shape of the connecting portion 43 is simply formed as an arc-shaped member. In this case, the outer surface of the outer member 30 contacts each of the first protrusions 45 and the inner surface 48 of the connecting portion 43.

[0122] In addition, Figure 6 In the path limiting member 40 shown, each first protrusion 45 protrudes from the inner surface of the top end 51 of the first end 41 and the top end 52 of the second end 42. According to this structure, compared to the above-described embodiment where the first protrusion 45 protrudes from the inner surface slightly away from the top end 51 of the first end 41 and the top end 52 of the second end 42, the path limiting member 40 is more likely to detach from the outer member 30 through the insertion port 44.

[0123] ·like Figure 5As shown, the first end 41 may also have: an arcuate portion 41a with a cross-sectional shape forming an arc centered on the central axis C; and an extension 41b that bends from the arcuate portion 41a and extends toward the second end 42. Similarly, the second end 42 may also have: an arcuate portion 42a with a cross-sectional shape forming an arc centered on the central axis C; and an extension 42b that bends from the arcuate portion 42a and extends toward the first end 41. Each extension 41b, 42b extends toward each other along the axis L2. In this modified example, each first protrusion 45 protrudes from the inner surface of the top end of each extension 41b, 42b. Each first protrusion 45 is inclined relative to the axis L1 such that it is located radially outward of the path limiting member 40 the closer it is to the central axis C. That is, the first protrusions 45 are inclined toward each other such that they are further away from each other the closer they are to the central axis C. Therefore, when the path limiting member 40 is assembled onto the outer member 30, the outer member 30 is easily guided into the interior of the path limiting member 40 by each of the first protrusions 45.

[0124] The first protrusion 45 may also be a protrusion that protrudes only from the inner surface of either the first end 41 or the second end 42. In this case, the second protrusion 46 is preferably located on the side opposite to the first protrusion 45, separated by the central axis C.

[0125] • The path limiting member 40 can also be a component made of metal materials such as iron, copper, or aluminum. In this case, the opening angle θ of the insertion port 44 and the thickness of the path limiting member 40 can be adjusted by enlarging the insertion port 44 in a way that prevents plastic deformation of the path limiting member 40.

[0126] For example Figure 7 As shown, the path limiting member 60 can also be made of metal, and the first protrusion 61 is formed by bending.

[0127] In detail, the path limiting member 60 is constructed of a metal sheet. Similar to the path limiting member 40 of the above embodiment, the path limiting member 60 has an insertion port 62 that opens in a direction orthogonal to the length direction of the path limiting member 60, a first end portion 63 and a second end portion 64 forming the insertion port 62, and a connecting portion 65 connecting the first end portion 63 and the second end portion 64. In other words, the path limiting member 60 has a connecting portion 65 formed to cover a portion of the circumferential direction of the outer component 30, a first end portion 63 and a second end portion 64 provided at both ends of the connecting portion 65, and an insertion port 62 formed through the first end portion 63 and the second end portion 64.

[0128] The path limiting member 60 has a first protrusion 61 that protrudes from the inner surfaces of the first end 63 and the second end 64 toward the outer member 30 and contacts the outer surface of the outer member 30. The first protrusion 61 is formed by bending. In detail, the first protrusion 61 is formed by folding back from the top tip 66 of the first end 63 and the top tip 67 of the second end 64 and rolling into the inside of the path limiting member 60.

[0129] In addition, for example Figure 8 As shown, the first protrusion 61 can also be formed by extending circumferentially from the top end 66 of the first end 63 and the top end 67 of the second end 64 and bending it in a manner that protrudes into the inside of the path limiting member 60, further folding it back and rolling it outward.

[0130] Based on these structures, since the path limiting member 60 is made of metal, it can suppress the internal temperature of the exterior component 30 and consequently the temperature rise of the wiring component 20, for example, when it is positioned close to a heat source of the vehicle. Furthermore, since the first protrusion 61 is formed by bending, the path limiting member 60 having the first protrusion 61 can be easily manufactured from sheet metal, for example.

[0131] The first protrusion 45 of the path limiting member 40 may also be made of a material that is softer than other parts of the path limiting member 40. In detail, the first protrusion 45 may be made of, for example, a material that is softer than other parts of the path limiting member 40 in terms of Rockwell hardness.

[0132] For example Figure 9 As shown, the first protrusion 45 may also be made of a material that is softer than the first end 41, the second end 42, and the connecting portion 43, which are other parts of the path limiting member 40. Specifically, for example, the first end 41, the second end 42, and the connecting portion 43 may be made of synthetic resins such as polypropylene, polyamide, and polyoxymethylene, and the first protrusion 45 may also be made of an elastomer. In this case, the path limiting member 40 may also be manufactured by extrusion molding, injection molding, or other manufacturing methods.

[0133] Alternatively, the first protrusion 45 may also be made of rubber. The first protrusion 45 may also be provided as an insert in a molded article having a first end 41, a second end 42, and a connecting portion 43. The first protrusion 45 may also be fixed to a molded article having a first end 41, a second end 42, and a connecting portion 43 by adhesive bonding.

[0134] Alternatively, the first protrusion 45 may also be made of a soft resin that is softer than other parts of the path limiting member 40.

[0135] In this way, because the first protrusion 45 is made of a material that is softer than other parts of the path limiting member 40, the first protrusion 45 can easily adhere to the outer member 30. Therefore, it can better prevent the path limiting member 40 from detaching from the outer member 30.

[0136] • The outer component 30 can also be a component with a flat cross-sectional shape. In this case, the path limiting component 40 can simply be a component with a flat shape that forms along the outer periphery of the outer component 30.

[0137] For example Figure 10 As shown, the outer component 70 and the path limiting component 80 can also be components formed in a flat shape. In this example, the outer component 70 is a rectangular corrugated pipe when viewed from its length. In detail, the outer component 70 has a pair of parallel long side structural portions 71 when viewed from its length, and a pair of short side structural portions 72 that are shorter than the long side structural portions 71 and connect the ends of the pair of long side structural portions 71 to each other.

[0138] The path limiting member 80 has a pair of long side structures 81 along each of the external long side structures 71, and a short side structure 82 connecting one end of the pair of long side structures 81 to each other and along one external short side structure 72. Additionally, the path limiting member 80 has a first end 83 and a second end 84 extending from the other ends of the pair of long side structures 81 toward each other in a direction of mutual approach, and an insertion port 85 formed through the first end 83 and the second end 84. Furthermore, the path limiting member 80 has a first protrusion 86 protruding from the inner surfaces of the first end 83 and the second end 84 toward the external member 70 and contacting the outer surface of the external member 70.

[0139] The direction orthogonal to the length direction of the path limiting member 80 is defined as the first direction D1. The direction orthogonal to both the length direction of the path limiting member 80 and the first direction D1 is defined as the second direction D2. The dimension of the path limiting member 80 in the first direction D1 is longer than the dimension of the path limiting member 80 in the second direction D2. That is, a pair of long-side structural portions 81 extend along the first direction D1. The short-side structural portion 82 extends along the second direction D2. The long-side structural portion 81 is longer than the short-side structural portion 82. In addition, the insertion port 85 opens in the first direction D1. That is, the insertion port 85 is provided between the pair of long-side structural portions 81 on the side opposite to the short-side structural portion 82.

[0140] Even so, the path limiting member 80 can be installed on the outer periphery of the outer component 70 through the insertion port 85. Furthermore, it can prevent the path limiting member 80 from detaching from the outer component 70 and avoid the formation of a slit in the outer component 70, thus preventing a decrease in the water-stopping performance of the wire harness 10.

[0141] Furthermore, compared to a structure where the insertion port 85 opens in the second direction D2, the size of the path-restricting member 80 in the second direction D2 can be shortened. That is, in the case where the insertion port opens in the second direction D2, it becomes a structure where the protrusion protrudes along the second direction D2. Therefore, the size of the path-restricting member 80 in the second direction D2 becomes longer, but this situation can be avoided by shortening the size of the path-restricting member 80 in the second direction D2.

[0142] In addition, for example, compared to the structure in which the insertion port 85 is open in the second direction D2, the structure makes it easy to expand the insertion port 85 by bending the long side structure portion 81, and the path restriction member 80 can be easily installed on the outer component 70 through the insertion port 85.

[0143] In addition, for example Figure 11 As shown, the external component 70 and the path limiting component 90 can also be configured as components forming a flat shape.

[0144] The path limiting member 90 in this example has a pair of short side structures 91 along each of the external short side structures 72, and a long side structure 92 connecting one end of the pair of short side structures 91 to each other and along one of the external long side structures 71. Additionally, the path limiting member 90 has a first end 93 and a second end 94 extending from the other ends of the pair of short side structures 91 toward each other in a direction of mutual approach, and an insertion port 95 formed through the first end 93 and the second end 94. Furthermore, the path limiting member 90 has a first protrusion 96 protruding from the inner surfaces of the first end 93 and the second end 94 toward the external member 70 and contacting the outer surface of the external member 70.

[0145] The direction orthogonal to the length direction of the path limiting member 90 is defined as the first direction D1. The direction orthogonal to both the length direction of the path limiting member 90 and the first direction D1 is defined as the second direction D2. The dimension of the path limiting member 90 in the first direction D1 is longer than the dimension of the path limiting member 90 in the second direction D2. That is, the long side structure portion 92 extends along the first direction D1. A pair of short side structure portions 91 extend along the second direction D2. The long side structure portion 92 is longer than the short side structure portions 91. In addition, the insertion port 95 opens in the second direction D2. That is, the insertion port 95 is provided between the pair of short side structure portions 91 on the side opposite to the long side structure portion 92.

[0146] Even so, the path limiting member 90 can be installed onto the outer periphery of the outer component 70 through the insertion port 95. Furthermore, it can prevent the path limiting member 90 from detaching from the outer component 70 and avoid the formation of a slit in the outer component 70, thus preventing a decrease in the water-stopping performance of the wire harness 10.

[0147] Furthermore, for example, compared to a structure where the insertion port 95 opens in the first direction D1, the size of the path-restricting member 90 in the first direction D1 can be shortened. That is, in the case where the insertion port is set to open in the first direction D1, it becomes a structure where the protrusion protrudes along the first direction D1. Therefore, the size of the path-restricting member 90 in the first direction D1 becomes longer, but this situation can be avoided by shortening the size of the path-restricting member 90 in the first direction D1.

[0148] In addition, for example, when the wiring harness 10 is laid out in a manner that passes under the floor of the vehicle V, the wiring harness 10 can be properly laid out by setting the opening direction of the insertion port 95 to the opposite direction of gravity, thereby preventing the outer component 70 from falling off the path restriction component 90.

[0149] In addition, Figure 10 and Figure 11 In the example shown, it is assumed that the outer component 70 is a rectangular corrugated pipe when viewed along its length. However, it does not have to be strictly rectangular; it only needs to be approximately rectangular within the range that achieves the desired effect in this embodiment. Alternatively, the outer component 70 can also be a component with a flat cross-section, such as an oblong cross-section. Furthermore, the path limiting components 80 and 90 can also be other shapes, as long as they are flat along the outer periphery of the outer component.

[0150] In addition, Figure 10 and Figure 11 In the example shown, it is assumed that the wire 21 of the wire component 20 is a wire with a circular cross-sectional shape, but it can also be a wire with a flat cross-sectional shape. In this case, for example, the internal gap of the outer component 70 can be reduced. In addition, of course, in other examples, the wire 21 can also be a wire with a flat cross-sectional shape.

[0151] • The path limiting member 40 presses the outer surface of the outer member 30 with each of the first protrusions 45 and each of the second protrusions 46, but as long as the path of the outer member 30 can be limited, for example, it can be configured not to press the outer surface of the outer member 30.

[0152] • The wire component 20 can be a component with one wire 21 or a component with three or more wires 21.

[0153] • The braided component 24 can also be omitted from the wire component 20.

[0154] • The wiring harness 10 may also be a wiring harness having a plurality of path limiting members 40 arranged at intervals along the length of the outer component 30.

[0155] • The path limiting member 40 is not limited to a member installed under the floor of the vehicle V. The path limiting member 40 can be any straight-line extension in the wiring path of the wire member 20, for example, it can also be a member installed inside the carriage of the vehicle V.

[0156] ·like Figure 2 As shown in the example, in the cross-sectional view of the path limiting member 40, the path limiting member 40 can also be configured to support the outer member 30 (e.g., the annular protrusion 31 of the bellows) from the radially outer side at multiple points. Figure 2 The first protrusion 45 and the second protrusion 46 of the path limiting member 40 are sometimes referred to as radially inward protrusions, which are configured to support the outer member 30 at four points from the radially outer side.

[0157] ·like Figures 5 to 9 As in the example, the radially inward surface of the path limiting member 40 (or 60) can have a plurality of first protrusions 45 (or 61) and concave or inwardly curved surfaces other than the plurality of first protrusions. Figures 5 to 9 As in the example, in the cross-sectional view of the path limiting member 40 (or 60), the path limiting member 40 (or 60) may also be configured such that the outer mounting member 30 (e.g., the annular protrusion 31 of the bellows) is supported at three points radially outward at a plurality of first protrusions 45 (or 61) and other local locations (e.g., local portions of the inwardly curved surface) besides the plurality of first protrusions.

[0158] ·like Figure 10 and Figure 11 As in the example, the radially inward surface of the path limiting member 80 (or 90) can have a plurality of first protrusions 86 (or 96) and a flat surface or inward plane portion other than the plurality of first protrusions. Figure 10 and Figure 11 As in the example, in the cross-sectional view of the path limiting member 80 (or 90), the path limiting member 80 (or 90) may also be configured such that the outer mounting member 70 is supported at three points radially outward at a plurality of first protrusions 86 (or 96) and other local locations (e.g., local portions of the inward plane) other than the plurality of first protrusions.

[0159] ·like Figure 2As in the example, the radially inward surface of the path limiting member 40 may also have a non-protruding surface that expands between the first protrusion 45 and the second protrusion 46. The non-protruding surface is sometimes referred to as part or all of the radially inward surface of the path limiting member 40 other than the first protrusion 45 and the second protrusion 46. Part or all of the radially inward surface of the path limiting member 40 other than the first protrusion 45 and the second protrusion 46 may also not contact the radially outward surface of the outer member 30. Part or all of the radially inward surface of the path limiting member 40 other than the first protrusion 45 and the second protrusion 46 may also not form a gap with the radially outward surface of the outer member 30. Even in Figures 5 to 11 In the example, part or all of the radially inward surfaces of the path limiting members 40, 60, 80, and 90, excluding the first protrusion, may not form a gap with the radially outward surfaces of the outer members 30 and 70.

[0160] Explanation of reference numerals in the attached figures

[0161] 10: Wiring harness

[0162] 20: Electrical wiring components

[0163] 30: External components

[0164] 40: Path limiting component

[0165] 41: First end

[0166] 42: Second end

[0167] 43: Connecting part

[0168] 44: Insertion port

[0169] 45: First protrusion (protrusion)

[0170] 46: Second protrusion

[0171] 47: Groove

[0172] 48: Inner surface

[0173] 51: The top of the first end

[0174] 52: The top of the second end

[0175] 60: Path limiting component

[0176] 61: First protrusion (protrusion)

[0177] 62: Insertion port

[0178] 63: First end

[0179] 64: Second end

[0180] 65: Connecting part

[0181] 66: The top of the first end

[0182] 67: The top of the second end

[0183] 70: Exterior components

[0184] 71: External long side structure section

[0185] 72: External short side structure section

[0186] 80: Path limiting component

[0187] 81: Long side structural section

[0188] 82: Short side structural section

[0189] 83: First end

[0190] 84: Second end

[0191] 85: Insertion port

[0192] 86: First protrusion (protrusion)

[0193] 90: Path limiting component

[0194] 91: Short side structural section

[0195] 92: Long side structural section

[0196] 93: First end

[0197] 94: Second end

[0198] 95: Insertion port

[0199] 96: First protrusion (protrusion)

[0200] D1 Direction 1

[0201] D2 Direction 2

Claims

1. A wire harness, comprising: Electrical wiring components; A cylindrical outer casing component covers the outer periphery of the wire component; as well as A path-limiting member covers a portion of the circumferential portion of the outer casing component and extends along the length of the outer casing component, thereby restricting the path of the wiring component. The path limiting component has: An insertion port is opened in a direction orthogonal to the length direction of the path limiting member and extends throughout the entire length direction, configured such that the outer component can be inserted into the insertion port; The first end and the second end are located opposite each other in the circumferential direction of the path limiting member, forming the insertion port; as well as A protrusion extends from the inner surface of at least one of the first end and the second end toward the outer component and contacts the outer surface of the outer component. The protrusion extends integrally along the length of the path limiting member. When the protrusion is designated as the first protrusion... The path limiting component has: The connecting part connects the first end and the second end; and The second protrusion protrudes from the inner surface of the connecting portion toward the outer component and contacts the outer surface of the outer component. The second protrusion extends along the length of the path limiting member. The second protrusion extends integrally along the length of the path limiting member. The first protrusion and the second protrusion have a semi-circular cross-sectional shape. They contact the outer surface of the outer component through their apex, thereby creating a gap between the inner surface of the first end, the second end and the connecting part and the outer surface of the outer component throughout the length direction of the path limiting component.

2. The wire harness according to claim 1, wherein, The protrusion protrudes from the inner surface of the first end and the inner surface of the second end.

3. The wire harness according to claim 1 or claim 2, wherein, The path limiting member has a groove, which is disposed on the outer surface of the portion of the connecting portion where the second protrusion is disposed, and extends along the second protrusion throughout the length direction of the path limiting member.

4. The wire harness according to claim 1 or claim 2, wherein, The protrusion protrudes from the inner surface of at least one of the tips of the first end and the second end.

5. The wire harness according to claim 1 or claim 2, wherein, Viewed along the length of the path limiting member, the top ends of the first end and the second end are curved.

6. The wire harness according to claim 1 or claim 2, wherein, The protrusion is made of a material that is softer than other parts of the path limiting member.

7. The wire harness according to claim 1 or claim 2, wherein, The path limiting component is made of metal. The protrusion is formed by bending.

8. The wire harness according to claim 1 or claim 2, wherein, The external components are flat in shape. The path limiting member forms a flat shape along the outer periphery of the outer component.

9. The wire harness according to claim 8, wherein, When the direction orthogonal to the length direction of the path limiting member is defined as the first direction, and the direction orthogonal to both the length direction of the path limiting member and the first direction is defined as the second direction, The dimension of the path limiting member in the first direction is longer than the dimension of the path limiting member in the second direction. The insertion port opens in the first direction.

10. The wire harness according to claim 8, wherein, When the direction orthogonal to the length direction of the path limiting member is defined as the first direction, and the direction orthogonal to both the length direction of the path limiting member and the first direction is defined as the second direction, The dimension of the path limiting member in the first direction is longer than the dimension of the path limiting member in the second direction. The insertion port opens in the second direction.

11. The wire harness according to claim 1 or claim 2, wherein, The outer casing is a flexible, circumferentially integral, and sealed bellows that extends throughout the outer casing.

Images