JPH11121052A - Connecting structure for wire with external conductor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance contact reliability of a wire with an external conductor and a mating conductor member. SOLUTION: In the case of connection, a tooth-like edge portion 19 passes through the gap of a braided wire 13A from outside, approaches so as to be along with the inner face of a shield layer (an external conductor) 13, a calking portion 18 is set from the external face side of the shield layer 13 so as to correspond to the tooth-like edge portion 19, and the calking portion 18 is calked to the shield layer 13. Since the shield layer 13 is sandwiched between the tooth-like edge portion 19 and the calking portion 18, a close contact between the shield layer 13, the tooth-like edge portion 19, and the calking portion 18 is maintained so that contact reliability is superior, even if resin-made core 12 yields permanently in fatigue. Since the tooth-like edge portion 19 passes through the shield layer 13 from out to in as a means for securing contact from the inside of the shield layer 13, the process is simple comparing with the case where a cylindrical sleeve is inserted into the gap between the shield layer and the core.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a connection structure for an electric wire with an external conductor.

[0002]

2. Description of the Related Art Conventionally, as means for connecting a shielded electric wire and a shield shell, there is one disclosed in Japanese Patent Application Laid-Open No. 7-245153. This is a structure in which the sheath of the shielded wire is peeled off to expose the braided shield layer, the U-shaped crimped portion of the shield shell is addressed thereto, and the crimped portion is crimped so as to surround the shield layer. . The resin core inside the shield layer is reduced in diameter by caulking, and the shield layer and the crimping portion are brought into close contact with each other by the restoring force of the core.

[0003]

However, since it is generally unavoidable that a resin core is formed in a shielded electric wire, in the above-described conventional connection structure, contact between the shield layer and the crimping portion is caused by the core set. There is a possibility that the reliability is reduced. As a countermeasure against the set of the core, it is considered to insert a high-rigidity sleeve in the gap between the shield layer and the core, which is resistant to caulking. However, in this method, the sleeve is inserted into a narrow space. Since a cumbersome process is required, there is a disadvantage that work efficiency is low. The present invention has been made in view of the above circumstances, and has as its object to improve contact reliability between an electric wire with an external conductor and a mating conductive member without lowering work efficiency.

[0004]

According to a first aspect of the present invention, there is provided an electric wire with an outer conductor having an outer conductor arranged along an outer periphery of a resin core through which an inner conductor is passed. A connection structure of an electric wire with an external conductor, which is configured to be caulked in a form in which a connection member provided on a mating conductive member side is surrounded, and the connection member penetrates the external conductor from an outer surface side to an inner surface thereof. A toothed edge portion that can enter along the edge portion, and a caulked portion that can correspond to the toothed edge portion from the outer surface side of the external conductor are provided, and the external conductor is crimped to form the toothed edge portion and the caulked portion. According to a second aspect of the present invention, the outer conductor is formed of a braided wire formed by knitting a plurality of fine metal wires in a net shape, and the tooth-shaped edge is formed of the metal. It was configured to be inserted into the gap between the fine wires.

[0005] The invention of claim 3 is claim 1 or claim 2.
In the invention of the above, the connecting member is composed of a pair of semi-cylindrical bodies that can be combined into a substantially cylindrical shape with side edges overlapped, and one of the overlapping side edges is a toothed edge. And the other is the caulking portion. According to a fourth aspect of the present invention, in the aspect of the third aspect, both side edges of one of the half cylinders are the caulking portions, and both caulking portions are narrowed in a space toward a circumferential end thereof. It was configured to be caulked.

[0006] The invention of claim 5 is the invention of claim 3 or claim 4.
In the invention of the present invention, a semi-cylindrical body in which both edges are both the caulked portion, and a semi-cylindrical body in which both side edges are both the toothed edges are separate parts, and The semi-cylindrical body on the side of the toothed edge is made of a highly rigid material that resists crimping.

[0007]

Actions and effects of the present invention

<Invention of claim 1> At the time of connection, the toothed edge portion penetrates the outer conductor from the outer surface side and enters along the inner surface, and the caulked portion is connected to the toothed edge portion from the outer surface side of the outer conductor. Correspondingly addressed, the caulked portion is caulked to the outer conductor in such a state. Since the outer conductor is sandwiched between the toothed edge and the caulked portion, even if the resin core is set, the close contact between the external conductor and the toothed edge and the caulked portion is maintained. ,
Excellent contact reliability. In addition, as means for ensuring contact from the inside to the external conductor, the toothed edge portion penetrates the external conductor from the external surface side to the inside, so that a cylindrical sleeve is provided in the gap between the external conductor and the core. The operation is simpler than the case of inserting the, so that there is no possibility that the operability is reduced.

<Invention of Claim 2> When the tooth-shaped edge portion is to enter the inside of the outer conductor, the tip of the tooth-shaped edge portion is appropriately inserted into a number of gaps provided in the braided wire. Good workability. <Invention of claim 3> At the time of connection, a pair of half-cylinder bodies are addressed so as to be sandwiched in the radial direction with respect to the outer conductor, and the toothed edge portion is advanced along the inner surface of the outer conductor and caulked. The part is made to correspond to the toothed edge, and caulking is performed. Since the connecting member is composed of a pair of semi-cylindrical bodies divided in the radial direction, the work directed to the outer conductor before crimping is simplified.
In addition, since the pair of half-cylinders are caulked in a cylindrical shape, the connection state to the external conductor is stabilized.

<Invention of Claim 4> Since both caulking portions are configured to embrace the semi-cylindrical body and the external conductor on the other side, the function of restricting the separation in the radial direction is improved, and the connection reliability is improved. . <Invention of claim 5> Since the semi-cylindrical body having the toothed edge addressed to the inner surface of the outer conductor has high rigidity, the toothed edge is displaced inward even if the core is set. Nothing.
Therefore, even if there is a gap between the toothed edge and the core, the state where the external conductor is pressed between the toothed edge and the caulked portion is maintained, and high contact reliability is maintained. can get.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 Embodiment 1 of the present invention will be described below with reference to FIGS. In the connection structure of the present embodiment, a shielded electric wire (an electric wire with an external conductor which is a constituent element of the present invention) 10 and a shield shell (a mating conductive member which is a constituent element of the present invention) 15 are connected via a connecting member 16. It is for doing. First, the shielded electric wire 10 will be described. The shielded electric wire 10 includes a conductor (inner conductor which is a constituent element of the present invention) 11 formed by twisting a plurality of conductive metal wires, a core 12 made of an insulating resin which covers the conductor 11, and a conductive metal wire. A shield layer (an outer conductor which is a constituent element of the present invention) 13 composed of a braided wire 13A in which the core 13 is braided along the outer periphery of the core 12 and a sheath 14 made of an insulating resin which covers the shield layer 13 It is configured. The tip of the conductor 11 is in a state where the core 12 is peeled off and exposed, and a male terminal fitting (not shown) is fixed thereto by caulking. The shield layer 13 is in a state where the sheath 14 is peeled off and exposed, and a connecting member 16 is connected to the exposed shield layer 13 by caulking.

The shield shell 15 is provided with the shielded electric wire 1.
It is for shielding a region not shielded by the zero shield layer 13 and is made of a metal cylinder. A connecting member 16 for connecting to the shielded electric wire 10 is composed of a receiving half cylinder 17R and a caulking half cylinder 17K, and is provided on the shield shell 15 side. That is, the rear end of the shield shell 15 is tapered in diameter, and the caulking-side half cylindrical body 17 is formed in the opening at the minimum diameter end so as to extend from the lower region of the opening edge.
K is integrally formed. This caulking half cylinder 17K
Has a semi-cylindrical shape that is open upward as a whole, and both edges thereof are caulking portions 18 that extend upward.

On the other hand, the receiving half-cylinder 17R has a semicylindrical shape which is opened downward as a whole, and both edges thereof are toothed edges 19 in which a plurality of teeth 19A are arranged. Each tooth 19A of the toothed edge portion 19 has a triangular shape at the tip and becomes thinner toward the tip, and its size is set to a size capable of entering the gap of the braided wire 13A. The receiving half cylinder 17R is made of a material having high rigidity that is not easily deformed by caulking.

Next, the operation of this embodiment will be described. When the shield shell 15 and the shielded electric wire 10 are connected, first, the receiving side semi-cylindrical body 17 </ b> R is addressed so as to cover the shield layer 13. At this time, each tooth 19 </ b> A of the toothed edge 19 is braided. 13A so as to enter along the inner surface of the shield layer 13 (see FIG. 5).
At this time, if the interval between the two toothed edges 19 is set slightly smaller than the outer diameter of the shield layer 13, the teeth 19 </ b> A are guided along the outer surface of the core 12 and are formed in the gaps between the braided wires 13 </ b> A. You can enter without fail. The receiving half cylinder 17R covers the upper half area of the shield layer 13. Next, the lower half region of the shield layer 13 is accommodated in the caulking-side half-barrel 17K, and both caulking portions 18 of the caulking-side half-barrel 17K are fitted to the toothed edges 19 of the receiving-side half-barrel 17R.
And a region above the toothed edge 19 from the outside. In this state, when the caulking portion 18 is caulked, the receiving half cylinder 17R and the caulking half cylinder 17R are formed.
K and shield wire 10 are integrated (see FIG. 3)
Thus, the shield layer 13 and the shield shell 15 are connected in a conductive state. In this connection state, as shown in FIG. 4, the braided wire 13A of the shield layer 13 is
And the caulking portion 18 squeezes from inside and outside, thereby ensuring the contact state between the shield layer 13 and the two half cylinders 17K and 17R.

As described above, in the present embodiment, the shield layer 13 is connected to the two half cylinders 17K and 17R from inside and outside as a means for connecting the shielded electric wire 10 and the shield shell 15.
Therefore, even if the resin core 12 is sagged inside the shield layer 13, there is no possibility that the contact pressure between the shield layer 13 and the two half cylinders 17K and 17R is reduced. In particular, since the receiving half cylinder 17R has a high rigidity against crimping, displacement of the core 12 to the inside of the toothed edge portion 19 is reliably prevented when the core 12 is sagged. Even if a gap is formed between the toothed edge 19 and the core 12, a state in which the shield layer 13 is pressed between the toothed edge 19 and the caulking portion 18 is maintained,
Demonstrate high contact reliability.

As means for ensuring the inside of the shield layer 13 from contact, the teeth 1
Since 9A is made to enter from the outside through the gap of the braided wire 13A, workability is superior to the case where a cylindrical sleeve is inserted into the gap between the shield layer 13 and the core 12. In particular, in the present embodiment, the shield layer 1
Since the braided wire 13A having a large number of gaps is used as 3, the teeth 19A of the toothed edge 19 can be easily inserted into the inside of the shield layer 13 simply by appropriately inserting them without positioning them. The workability can be improved also by this.

Further, since the connecting member 16 is composed of a pair of half-cylinders 17K, 17R on the caulking side and the receiving side divided in the radial direction, the half-cylindrical bodies 17K, 17R are formed on the shield layer 13 before caulking. And the operation of causing the toothed edge portion 19 to enter the gap of the braided wire 13A is easy. Moreover, since the pair of half-cylinder bodies 17K and 17R are combined into a cylindrical shape and are caulked so as to surround the shield layer 13 over the entire circumference, the connection state to the shield layer 13 is stabilized. In the connection state, the both caulked portions 18 are arranged above the portion of the maximum diameter of the receiving half cylinder 17R, and caulked in such a manner that the interval between the caulked portions 18 is reduced toward the circumferential end. I have. That is, since both caulking portions 18 are tightened so as to embrace the receiving half-cylinder 17R and the shielded electric wire 10, the caulking-side half-cylindrical 17K, the receiving half-cylindrical 17R and the shielded electric wire 10 are separated in the radial direction. Therefore, the connection reliability is improved.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, both the receiving-side half-cylinder 21R and the caulking-side half-cylinder 21K, which are the connection members 20, are formed integrally with the shield shell 15. That is, at the opening edge of the tapered reduced-diameter end portion of the shield shell 15, a receiving-side semi-cylindrical body 21 </ b> R having a toothed edge portion 22 extends obliquely upward from the upper end, and the swaging portion 23 is formed from the lower end. Caulking side half cylinder 2
1K extends obliquely downward. At the time of connection with the shielded electric wire 10, first, the receiving side half cylindrical body 21 </ b> R is bent downward so that
2 enters the inside of the shield layer 13 from the gap of the braided wire 13A, and thereafter, the swaged portion 23 and the toothed edge portion 22 are deformed while deforming the swage-side half-cylindrical body 21K from below toward the shield layer 13. After that, caulking is performed. Other configurations are the same as those in the first embodiment.
About the same structure, the same code | symbol is attached | subjected and description of a structure, an effect | action, and an effect is abbreviate | omitted. In the second embodiment, the connection member 2
Since the two half-cylinders 21K and 21R that constitute 0 are both integrally formed with the shield shell 15, the number of parts is smaller than in the first embodiment, and the parts management cost can be reduced.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIGS. In the first embodiment, two caulking portions 18 are provided on the caulking-side half-cylinder 17K integral with the shield shell 15, and the two toothed edges 1R are provided on the receiving-side half-cylinder 17R separate from the shield shell 15.
In the third embodiment, both the half cylinder 26A integrated with the shield shell 15 and the separate half cylinder 26B are provided.
Each of the caulking portions 27A, 27B and the toothed edge portion 28A,
28B. When connecting, the half cylinder 2 on the integrated side
6A, the shielded electric wire 10 is placed and its toothed edge 28A
Into the inside of the shield layer 13, and then cover the semi-cylindrical body 26B on the separate side so as to cover it from above.
8B enters the inside of the shield layer 23. In this state, both the caulked portions 27A and 27B correspond to the toothed edges 28A and 28B of the other side. The shielded wire 10 and the shield shell 15 are connected by the connecting member 25. Other configurations are the same as those of the first embodiment, and thus the same configurations are denoted by the same reference numerals.
The description of the structure, operation and effect is omitted.

<Fourth Embodiment> Next, a fourth embodiment of the present invention will be described with reference to FIGS. In the first to third embodiments, the connection member is formed of a pair of half-cylinders. However, the connection member 30 of the fourth embodiment is a single unit integrated with the shield shell 15. That is, the connection member 30 extends from the lower half of the rear end opening edge of the shield shell 15 and has a U-shape. One of the two side edges is a toothed edge 31 and the other is a swaged portion 32. When the shielded electric wire 10 is connected to the shielded electric wire 10, the braided wire 13 </ b> A is deformed so that the toothed edge portion 31 is wound inward while the shielded electric wire 10 is housed in the connection member 30.
Then, the caulking portion 32 is deformed so as to be wound inward and is opposed to the toothed edge portion 31 from the partially notched portion. If you caulk in this state,
The shield layer 13 is pressed by the toothed edge portion 31 and the caulked portion 32, so that the shielded electric wire 10 and the shield shell 15 are pressed.
Is connected.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention. (1) In the first embodiment, the caulking portion is provided in a half-cylinder body integral with the shield shell (the other conductive member), and the toothed edge is provided in a half-cylinder body separate from the shield shell. According to this, a toothed edge is provided on a semi-cylindrical body integral with the shield shell,
A caulking portion may be provided on a semi-cylindrical body separate from the shield shell.

(2) In each of the above embodiments, the semi-cylindrical body integrally formed with the shield shell may be a separate part from the shield shell. In this case, the two half cylinders and the shield shell may be fixed simultaneously with the crimping or in a separate step from the crimping. (3) In the above embodiments, the outer conductor is a braided wire.
According to the present invention, the outer conductor is not limited to the braided wire, and the toothed edge portion is made to penetrate the metal foil by using a relatively easily breakable conductive metal foil, or a large number of through holes are previously formed. A toothed edge may be inserted into the through hole using a metal foil.

(4) In the above embodiments, the case where the electric wire with an outer conductor is a shielded electric wire has been described. However, the present invention is also applicable to a coaxial cable in which an inner conductor, a core, an outer conductor, and a sheath are concentrically arranged in order. Can be applied.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a shield shell and a connection member according to a first embodiment.

FIG. 2 is a side view showing a state before connection according to the first embodiment.

FIG. 3 is a side view showing a connection state of the first embodiment.

FIG. 4 is an enlarged sectional view showing a connection state of the first embodiment;

FIG. 5 is a partially enlarged perspective view showing a state where a toothed edge portion has entered a gap between braided wires in the first embodiment.

FIG. 6 is a perspective view illustrating a shield shell and a connection member according to a second embodiment.

FIG. 7 is a side view showing a connection state of the second embodiment.

FIG. 8 is a perspective view illustrating a shield shell and a connection member according to a third embodiment.

FIG. 9 is an enlarged sectional view showing a connection state of the third embodiment.

FIG. 10 is a perspective view showing a shield shell and a connection member according to a fourth embodiment.

FIG. 11 is an enlarged sectional view showing a connection state of the fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Shield electric wire (electric wire with an external conductor) 13 ... Shield layer (external conductor) 13A ... braided wire 13B ... metal thin wire 15 ... Shield shell (partner conductive member) 16 ... Connection member 17K ... Caulking half cylinder 17R ... Receiver Side semi-cylinder 18 ... Caulking portion 19 ... Toothed edge 20,25,30 ... Connecting member 21K ... Caulking-side half cylinder 21R ... Receiving half-tubular body 22,28A, 28B, 31 ... Toothed edge 23, 27A, 27B, 32 ... crimping portion 26A ... half cylinder on one side 26B ... half cylinder on another side

Claims (5)

[Claims] 1. A connecting member provided on a mating conductive member side with respect to the external conductor of an external conductor wire having an external conductor arranged along the outer periphery of a resin core through which an internal conductor penetrates. A connection structure for an electric wire with an external conductor that is crimped in a surrounding form, wherein the connection member has a toothed edge portion that can penetrate the external conductor from the outer surface side and enter along the inner surface thereof. A caulking portion that can correspond to the toothed edge portion from the outer surface side of the external conductor, and that the external conductor is clamped between the toothed edge portion and the caulking portion by caulking. Characteristic connection structure of electric wire with external conductor. 2. The structure according to claim 1, wherein the outer conductor is formed of a braided wire formed by knitting a plurality of fine metal wires in a net shape, and the tooth-shaped edge portion is inserted into a gap between the fine metal wires. The connection structure of the electric wire with an external conductor according to the description. 3. The connecting member comprises a pair of semi-cylindrical bodies that can be combined into a substantially cylindrical shape with side edges overlapping each other, and one of the overlapping side edges is a toothed edge. The connection structure for an electric wire with an external conductor according to claim 1 or 2, wherein the other portion is the caulking portion. 4. A method according to claim 1, wherein both side edges of said one half cylindrical body are said caulked portions, and both caulked portions are caulked in such a manner as to narrow a gap toward a circumferential end thereof. Item 4. A connection structure for an electric wire with an external conductor according to item 3. 5. A semi-cylindrical body, both edges of which are said caulked portions, and a semi-cylindrical body, of which both side edges are both said toothed edges, are separate parts, 5. The connection structure for an electric wire with an external conductor according to claim 3, wherein the semi-cylindrical member on the side of the toothed edge is made of a highly rigid material that is resistant to caulking.