The present disclosure relates to a shielded electrically conductive path.
Patent Document 1 discloses a terminal-equipped shielded cable including a shielded cable and a terminal. The shielded cable includes a braided wire surrounding a wire and a sheath surrounding the braided wire, and a folded portion covering the outer peripheral surface of the sheath is formed by folding a front end part of the braided wire rearward. A barrel is formed in a rear end part of the terminal, and a protrusion projecting radially inward is formed at the rear end of the barrel. A sleeve is arranged in a gap between the outer peripheral surface of the sheath and the folded portion, and swaged to the outer peripheral surface of the sheath. The barrel is swaged to the sleeve while surrounding the folded portion. The protrusion is arranged to face the sleeve from behind. If a rearward tensile force is applied to the shielded cable, the sleeve integrated with the shielded cable is locked to the protrusion, whereby the shielded cable and the terminal are held in a fixed state.
Since the folded portion of the braided wire is interposed between the inner peripheral surface of the barrel and the outer peripheral surface of the sleeve, the sleeve pushes the protrusion at a position more radially inward than a bent portion continuous with the protrusion and the barrel when a tensile load is applied to the shielded cable. A moment of a force originated from the bent portion continuous with the protrusion and the barrel when the sleeve pushes the sleeve increases toward the projecting end of the protrusion. Thus, in the terminal-equipped shielded cable of Patent Document 1, when a tensile load is applied to the shielded cable, there is a concern that the protrusion pushed by the sleeve is deformed to open and the reliability of a fixing function by the locking of the sleeve and the protrusion is reduced.
A shielded electrically conductive path of the present disclosure was completed on the basis of the above situation and aims to improve the reliability of a fixing function against a tensile load.
The present disclosure is directed to a shielded electrically conductive path with a shielded cable including a shield layer surrounding a conductor, a sheath surrounding the shield layer and a folded portion covering an outer peripheral surface of the sheath, the folded portion being formed by folding a front end part of the shield layer rearward, a sleeve arranged in a gap between the outer peripheral surface of the sheath and the folded portion, the sleeve being swaged to the outer peripheral surface of the sheath, and an outer conductor formed with a crimping portion in a rear end part, the crimping portion including a tubular swaging portion and a claw portion cantilevered radially inward from a rear end of the swaging portion, the sleeve including a base portion and an extending portion extending rearward from a rear end edge of the base portion, an outer diameter of a rear end of the extending portion being larger than that of the base portion, and the crimping portion being crimped to the sleeve in a state where the swaging portion surrounds the folded portion and the claw portion faces the extending portion from behind.
According to the present disclosure, it is possible to improve the reliability of a fixing function against a tensile load.
First, embodiments of the present disclosure are listed and described.
(1) The shielded electrically conductive path of the present disclosure is provided with a shielded cable, a sleeve and an outer conductor. The shielded cable includes a shield layer surrounding a conductor, a sheath surrounding the shield layer and a folded portion covering an outer peripheral surface of the sheath, the folded portion being formed by folding a front end part of the shield layer rearward. The sleeve is arranged in a gap between the outer peripheral surface of the sheath and the folded portion, and swaged to the outer peripheral surface of the sheath. The outer conductor is formed with a crimping portion in a rear end part. The crimping portion includes a tubular swaging portion and a claw portion cantilevered radially inward from a rear end of the swaging portion. The sleeve includes a base portion and an extending portion extending rearward from a rear end edge of the base portion. An outer diameter of a rear end of the extending portion is larger than that of the base portion. The crimping portion is crimped to the sleeve in a state where the swaging portion surrounds the folded portion and the claw portion faces the extending portion from behind.
If the shielded cable is pulled rearward, the extending portion pushes the claw portion rearward. A moment of a force originated from a bent portion continuous with the claw portion and the swaging portion is smaller when a base end part of the claw portion is pushed than when a tip part thereof is pushed. Since the extending portion pushes the base end part of the claw portion in the shielded electrically conductive path of the present disclosure, there is no possibility that the claw portion is deformed to open rearward. Therefore, according to the shielded electrically conductive path of the present disclosure, the reliability of a fixing function against a tensile load can be improved.
(2) Preferably, an outer peripheral edge of the rear end of the extending portion is in contact with an inner periphery of the swaging portion. According to this configuration, since a position where the extending portion pushes the claw portion can be set at a position closest to the swaging portion, the reliability of the fixing function against a tensile load can be most enhanced.
(3) Preferably, a part of the folded portion is sandwiched in a squeezed state between an outer peripheral surface of the extending portion and an inner peripheral surface of the swaging portion. According to this configuration, misalignment between the sleeve and the folded portion can be prevented.
(4) Preferably, a rear end outer peripheral edge of the extending portion has a circular shape, and a rear end part of the crimping portion has an elliptical shape. According to this configuration, even if the swaging accuracy of the sleeve and that of the crimping portion are low, parts continuous with a minor axis, out of the swaging portion, can be brought into contact with the outer peripheral edge of the extending portion.
One specific embodiment of the present disclosure is described with reference to
As shown in
The shielded cable 11 is formed such that the outer peripheries of two coated wires 13 are surrounded by a braided wire 14, which is a shield layer made of metal thin wires, and the outer periphery of the braided wire 14 is surrounded by a sheath 15. The two coated wires 13 are so-called twisted pair wires. Each coated wire 13 includes a core wire 16, which is a conductor, and an insulation coating 17 surrounding the outer periphery of the core wire 16. Copper, copper alloy, aluminum, aluminum alloy or the like is used for the core wire 16. The core wire 16 may be constituted by one metal strand or a stranded wire formed by twisting a plurality of metal strands. The insulation coatings 17 and the sheath 15 are made of insulating and flexible synthetic resin. An end processing such as stripping is applied to an end of the shielded cable 11 to expose an end of each of the core wires 16, the insulation coatings 17 and the braided wire 15. The braided wire 14 is formed by braiding a plurality of metal thin wires into a tubular shape. A part of the braided wire 14 exposed to extend from the end of the sheath 15 is folded toward an end side of the sheath 15 (rearward) and is formed as a folded portion 14A covering the outer peripheral surface of the sheath 15.
The sleeve 27 is made of metal. As shown in
The sleeve 27 is swaged to the outer peripheral surface of the sheath 15 and, thereafter, arranged to cover the outer peripheral surface of the sheath 15 in a gap between the outer peripheral surface of the end of the sheath 15 and the folded portion 14A (braided wire 14) by folding the exposed braided wire 14 (see
The female terminal 18 is formed by press-working a metal plate material into a predetermined shape. Copper, copper alloy, aluminum, aluminum alloy or the like is used for the female terminal 18. As shown in
One clip 25 is attached to the two coated wires 13 drawn out from the end of the sheath 15. The clip 25 is formed by press-working a metal plate material into a predetermined shape. As shown in
As shown in
The first outer conductor 33 is formed by press-working a metal plate material into a predetermined shape. Copper, copper alloy, aluminum, aluminum alloy or the like is used for the first outer conductor 33. As shown in
As shown in
The second outer conductor 34 is formed by press-working a metal plate material into a predetermined shape. Copper, copper alloy, aluminum, aluminum alloy or the like is used for the second outer conductor 34. The second outer conductor 34 includes a front crimping portion 44, a rear crimping portion 45, which is a crimping portion, and a second coupling portion 46. The front crimping portion 44 is located on a front side and crimped to the outer periphery of the rectangular tube portion 35 (see
In the front crimping portion 44, left and right walls hang down from both left and right end edges of an upper wall extending in the front-rear direction and lateral direction. As shown in
The projecting portion 43 provided on the left wall of the rectangular tube portion 35 is fit into the slit 44A in the left wall of the front crimping portion 44 (see
The rear crimping portion 45 is provided behind the second coupling portion 46 in a rear end part of the second outer conductor 34. The rear crimping portion 45 includes a swaging portion 50 extending rearward from the rear end part of the second coupling portion 46 and six claw portions 52 cantilevered radially inward from the rear end of the swaging portion 50.
The swaging portion 50 is curved upward when viewed from the front-rear direction. The swaging portion 50 includes two right crimping pieces 50A and a left crimping piece 50B. The two right crimping pieces 50A are provided at an interval in the front-rear direction on the right end edge of the swaging portion 50. One right crimping piece 50A is provided in each of front and rear end parts of the right end edge of the swaging portion 50. A right locking portion 50C is formed on a tip part of each right crimping piece 50C. The right locking portion 50C is formed by folding the tip part of the right crimping piece 50A laterally inward. These right crimping pieces 50A hang down as shown by a two-dot-chain line before being swaged to the shielded cable 11. These right crimping pieces 50A are curved and deformed along the outer peripheral surface of the shielded cable 11 to embrace the shielded cable 11 from below after being swaged to the shielded cable 11 (see
The left crimping piece 50B is provided to extend in a central part in the front-rear direction of the left end edge of the swaging portion 50. A width in the front-rear direction of the left crimping piece 50B is set to be smaller than the interval in the front-rear direction between the pair of right crimping pieces 50A. A left locking portion 50D is formed on a tip part of the left crimping piece 50B. The left locking portion 50D is formed by folding the tip part of the left crimping piece 50B laterally inward. This left crimping piece 50B hangs down as shown by a two-dot-chain line before being swaged to the shielded cable 11. The left crimping piece 50B is curved and deformed along the outer peripheral surface of the shielded cable 11 to embrace the shielded cable 11 from below after being swaged to the shielded cable 11 (see
The six claw portions 52 are provided apart from each other along the rear end edge of the swaging portion 50. These claw portions 52 are bent radially inwardly of the shielded cable 11 substantially at a right angle from the rear end edge of the swaging portion 50 with the swaging portion 50 swaged to the end part of the shielded cable 11 (see
With the rear crimping portion 45 swaged and crimped to the folded portion 14A and the connecting plate portion 36 (i.e. the end part of the shielded cable 11), the claw portions 52 are arranged to face and contact the rear end of the extending portion 27B of the sleeve 27 from behind (see
Further, with the rear crimping portion 45 swaged to the folded portion 14A and the connecting plate portion 36 (i.e. the end part of the shielded cable 11), the right locking portions 50C are facing the left edge of the connecting plate portion 36 from left across a tiny gap (see
Next, an example of an assembly process of the shielded electrically conductive path 10 is described. The assembly process of the shielded electrically conductive path 10 is not limited to the one described below.
First, as shown in
Subsequently, as shown in
Subsequently, as shown in
Subsequently, the female terminals 18 are arranged in the upper dielectric 29, and the lower dielectric 28 is assembled with the upper dielectric 29. Then, the dielectric 19 is inserted into the rectangular tube portion 35 of the first outer conductor 33 from behind (see
Subsequently, as shown in
At this time, as shown in
At this time, as shown in
Next, functions and effects of the embodiment are described.
The shielded electrically conductive path 10 of the present disclosure is provided with the shielded cable 11, the sleeve 27 and the second outer conductor 34. The shielded cable 11 includes the braided wire 14 surrounding the core wire 16 and the sheath 15 surrounding the braided wire 14, and the folded portion 14A covering the outer peripheral surface of the sheath 15 is formed by folding the front end part of the braided wire 14 rearward. The sleeve 27 is arranged in the gap between the outer peripheral surface of the sheath 15 and the folded portion 14A and swaged to the outer peripheral surface of the sheath 15. The second outer conductor 34 is formed with the rear crimping portion 45 in the rear end part. The rear crimping portion 45 includes the tubular swaging portion 50 and the claw portions 52 cantilevered radially inward from the rear end of the swaging portion 50. The sleeve 27 includes the tubular base portion 27A and the extending portion 27B extending rearward from the rear end edge of the base portion 27A. The outer diameter of the rear end of the extending portion 27B is larger than that of the base portion 27A. The rear crimping portion 45 is crimped to the sleeve 27 in a state where the swaging portion 50 surrounds the folded portion 14A and the claw portions 52 face the extending portion 27B from behind.
If the shielded cable 11 is pulled rearward, the extending portion 27B pushes the claw portions 52 rearward. When the extending portion 27B pushes the claw portion 52, a moment of a force originated from the bent portion 52A continuous with the claw portion 52 and the swaging portion 50 is smaller when the base end part 52B of the claw portion 52 is pushed than when the tip part 52C thereof is pushed. Since the extending portion 27B pushes the base end parts 52B of the claw portions 52 in the shielded electrically conductive path 10 of the present disclosure, there is no possibility that the claw portions 52 are deformed to open rearward. Therefore, according to the shielded electrically conductive path 10 of the present disclosure, the reliability of a fixing function against a tensile load can be improved.
The outer peripheral edge of the rear end of the extending portion 27B of the shielded electrically conductive path 10 of the present disclosure is in contact with the inner periphery of the swaging portion 50. According to this configuration, since positions where the extending portion 27B pushes the claw portions 52 can be set at positions closest to the inner peripheral surface of the swaging portion 50 (i.e. the base end parts 52B), the reliability of the fixing function against a tensile load can be most enhanced.
The rear end outer peripheral edge of the extending portion 27B of the shielded electrically conductive path 10 of the present disclosure has a circular shape, and the rear end part of the rear crimping portion 45 has an elliptical shape. According to this configuration, even if the swaging accuracy of the sleeve 27 and that of the rear crimping portion 45 are low, parts continuous with the minor axis, out of the swaging portion 50, can be brought into contact with the outer peripheral edge of the extending portion 27B.
The embodiment disclosed this time should be considered illustrative in all aspects, rather than restrictive. The scope of the present invention is not limited to the embodiment disclosed this time, but is represented by claims and intended to include all changes in the scope of claims and in the meaning and scope of equivalents.
Unlike the above embodiment, a part of the folded portion 14A may be sandwiched in a squeezed state between the outer peripheral surface of the extending portion 27B and the inner peripheral surface of the swaging portion 50 as shown in
Although the shield layer is the braided wire in the above embodiment, the shield layer may be a metal foil or the like without being limited to the braided wire.
Although the rear end outer peripheral edge of the extending portion has a circular shape and the rear end part of the rear crimping portion has an elliptical shape in the above embodiment, both the rear end outer peripheral edge of the extending portion and the rear end part of the rear crimping portion may have a circular shape.
Although a twisted pair cable is used as the shielded cable in the above embodiment, a coaxial cable may be used.
Unlike the above embodiment, a sleeve formed with a slit from one end to the other end in an axial direction may be used. Further, as in a sleeve 127 shown in
| Number | Date | Country | Kind |
|---|---|---|---|
| 2021-112602 | Jul 2021 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2022/026570 | 7/4/2022 | WO |