JP6955133B1 - Cable with round connector and its manufacturing method - Google Patents

Abstract

Provided is a cable with a round connector that can guarantee the electrical characteristics as a communication cable. The cable 1A with a round connector is a resin that covers a LAN cable 10 composed of a twisted pair cable that is a twisted pair wire, a connector portion 15 that is connected to the LAN cable 10, and a connection portion between the LAN cable 10 and the connector portion 15. It has a mold portion 16. The resin mold portion 16 is provided with an inner housing for positioning the anti-twisted wire exposed from the LAN cable 10.

Description

The present invention relates to a cable with a round connector and a method for manufacturing the same.

Conventionally, the RJ45 type connector is widely known as a general-purpose connector of Ethernet (registered trademark). In recent years, "round connectors" have come to be accepted in many industries as connectors that can cover the high reliability required for industrial applications such as vibration resistance and waterproofness. It is possible to secure the above characteristics simply by fitting and screwing.

Patent Documents 1 and 2 disclose a round connector and a LAN (Local Area Network) cable using the same.
In Patent Document 1, four pairs of differential pairs P are formed for each of two mating contacts 120 (pin contacts) or mating contacts 220 (socket contacts), and the arrangement of each differential pair P is arranged in a special arrangement. By doing so, it is attempted to improve electrical characteristics such as near-end crosstalk, far-end crosstalk, insertion loss, and reflection attenuation (paragraphs 0018, 0021, 0023-0030, FIG. 5 and the like).
Also in Patent Document 2, four pairs of differential pairs P are formed for each of two contacts 50 (pin contacts) or contacts 90 (socket contacts), and the arrangement of each differential pair P is made into a special arrangement. The influence of crosstalk is reduced and the standard value of insertion loss is cleared (paragraphs 0020, 0030, 0033-0040, FIGS. 6-8, etc.).

Japanese Patent No. 5565835 JP-A-2018-142417

However, in the techniques of Patent Documents 1 and 2, there is no mention of the connection portion between the connector portion and the LAN cable, and it is necessary to take the connection portion into consideration to improve the electrical characteristics of the communication cable. be.
Therefore, a main object of the present invention is to provide a cable with a round connector capable of improving the electrical characteristics as a communication cable, taking into consideration the connection portion between the connector portion and the LAN cable.

According to the present invention, in order to solve the above problems,
A LAN cable consisting of a twisted pair cable that is a pair of twisted wires,
The connector part connected to the LAN cable and
It has a connection portion between the LAN cable and the connector portion, and has a connection portion.
The connection portion is a cable with a round connector in which an inner housing for positioning the anti-twisted wire exposed from the LAN cable is installed.
The LAN cable is composed of four pairs of twisted wires and has different twisted pitches.
In a state where the twisted pair wire is exposed from the LAN cable and is positioned in the inner housing from a perspective view or a cross-sectional view, the twisted pair wire having the second longest twisted pair pitch is upward and the twisted pair pitch. When the longest twisted pair wires are arranged below, the twisted pair wire with the third longest twisted pair pitch intersects on the upper side of the twisted pair wire with the fourth longest twisted pair pitch. A cable with a round connector is provided.

According to the present invention, the electrical characteristics of the communication cable can be improved.

It is a top view which shows the appearance of the cable with a round connector. It is a schematic perspective view of a LAN cable. It is a schematic plan view which omitted the resin mold from FIG. It is a schematic perspective view of an inner housing. It is a top view which shows the appearance of the cable with a round connector. It is a schematic cross-sectional view of a LAN cable. FIG. 5 is a perspective view in which the resin mold portion is omitted from FIG. 5 and each part is disassembled. It is a schematic perspective view of an inner housing. It is the schematic perspective view which shows the back side of the insert. It is the schematic perspective view which shows the front side of the insert. It is a figure which shows roughly the internal structure of the resin mold part, and is the figure which shows how the anti-twisted wire is connected to a connector part via an inner housing. It is a figure which shows roughly the internal structure of the resin mold part, and is the figure which shows the state of being covered with a shielding cylinder body. It is a perspective view which shows the modification of the inner housing. It is a perspective view which shows the modification of the inner housing.

Hereinafter, a cable with a round connector according to a preferred embodiment of the present invention will be described.

[First Embodiment]
As shown in FIG. 1, the cable 1A with a round connector is mainly composed of a LAN (Local Area Network) cable 10, a connector portion 15, and a resin mold portion 16.

As shown in FIG. 2, the LAN cable 10 is a communication cable composed of a so-called twisted pair cable, and has a cable core 9, an inner layer 4, and a th. It has a shielding layer 5 of 1, a second shielding layer 6, and an outer cover layer 7.
The anti-twisted wire 8 has a structure in which two insulated wires 12 are twisted together. The insulated wire 12 has a structure in which the conductor 2 is covered with the insulator 3. The conductor 2 is made of annealed copper wire, and the insulator 3 is made of polyethylene resin.

The inner layer 4 covers the outer periphery of the cable core 9, and is formed by extruding a polyethylene resin having flame resistance.
The first shielding layer 5 and the second shielding layer 6 sequentially cover the outer peripheral side of the inner covering layer 4.
The first shielding layer 5 is formed by laminating and winding a polyester tape on which an aluminum foil is attached and laminated on the outer peripheral surface of the inner covering layer 4. The second shielding layer 6 is made of a tin-plated annealed copper wire braid.
The outer cover layer 7 covers the outer periphery of the second shielding layer 6 to form the outermost layer of the LAN cable 10. The outer cover layer 7 is made of an oil-resistant resin.

The connector portion 15 is a portion connected to another connector cable, a connector for connecting a board, or the like, and a resin insert (not shown) is installed in a metal sleeve (member exposed in FIG. 1). A contact (so-called metal terminal, not shown) that conducts with the conductor 2 is arranged there.
The resin mold portion 16 is a connection portion between the LAN cable 10 and the connector portion 15 (metal sleeve), and the portion is molded (coated) with resin.
The cable 1A with a round connector is a so-called overmolded cable in which the LAN cable 10 and the connector portion 15 are covered with a resin mold portion 16.

As shown in FIG. 3, in the state where the resin mold portion 16 is omitted in the cable 1A with a round connector (at the stage before forming the resin mold portion 16), the connection portion between the LAN cable 10 and the connector portion 15 is inner. The housing 17 is installed.
As shown in FIG. 4, the inner housing 17 is a resin member having a substantially columnar shape, and a plurality of grooves 18 are formed along the length direction. Here, four grooves 18 are formed corresponding to the number of twisted wires 8.
In the present embodiment, the anti-twisted wire 8 is fitted and positioned in the groove 18 in a twisted state, and is fixed by the resin mold portion 16 in that state.

Next, a method of manufacturing the cable 1A with a round connector will be described.

The manufacturing method is largely composed of a connecting step between the LAN cable 10 and the connector portion 15 and a forming step of the resin mold portion 16.
In the process of connecting the LAN cable 10 and the connector portion 15, the LAN cable 10 is first cut to a desired length, and at the cut portion, the inner layer 4, the first shielding layer 5, the second shielding layer 6 and the like are cut. The outer layer 7 is peeled off to expose the anti-twisted wire 8 (insulated wire 12). After that, the insulator 3 is peeled off from the tip of the insulated wire 12, and the contact is crimped to the conductor 2. After that, the anti-twisted wire 8 is fitted into the groove 18 of the inner housing 17 without untwisting the anti-twisted wire 8 in the twisted state. After that, the contact is inserted into a resin insert and installed in a metal sleeve to connect the LAN cable 10 and the connector portion 15.
In the process of forming the resin mold portion 16, the connection portion between the LAN cable 10 and the connector portion 15 (the portion straddling the LAN cable 10 and the connector portion 15 centering on the exposed anti-twisted wire 8) is installed in a certain mold. , Inject molten resin into the connection site. When the resin is cured, the mold is removed to form the resin mold portion 16.
By these steps, the cable 1A with a round connector can be manufactured.

According to the above embodiment, at the connection portion between the LAN cable 10 and the connector portion 15, the anti-twisted wire 8 exposed from the LAN cable 10 is fitted into the groove 18 of the inner housing 17 and positioned and the groove 18 is formed. Among them, it keeps the twisted state. Therefore, even when the molten resin is injected in the manufacturing process of the cable 1A with a round connector or after the manufacturing is completed (after commercialization), the distance between the pairs of the stranded wires 8 is kept constant, and the cable can be used as a communication cable. The electrical characteristics can be ensured (see Example 1).

[Second Embodiment]
As shown in FIG. 5, the cable 1B with a round connector is mainly composed of a LAN (Local Area Network) cable 20, a connector portion 40, and a resin mold portion 60.

As shown in FIG. 6, the LAN cable 20 is a communication cable composed of a so-called twisted pair cable, and has a cable core 9, an inner layer 4, and a th. It has a shielding layer 5 of 1, a second shielding layer 6, and an outer cover layer 7.

The anti-twisted wire 8 has a structure in which two insulated wires 12 are twisted together. The insulated wire 12 has a structure in which the conductor 2 is covered with the insulator 3. The conductor 2 is made of annealed copper wire, and the insulator 3 is made of polyethylene resin.
In the anti-twisted wire 8, the insulator 3 is colored and the anti-twisted pitch is also different from each other. The twisted pair pitch is 7 to 14 mm. The twisted pair wire 8a is colored with brown / white tea and has the longest twisted pair pitch. The twisted pair wire 8b is colored orange / white orange and has the second longest twisted pair pitch. The twisted pair wire 8c is colored green / white green and has the third longest twisted pair pitch. The twisted pair wire 8d is colored blue / white blue and has the fourth longest (shortest) twisted pair pitch.

A cross-shaped interposition 21 is installed in the cable core 9. The cross interposition 21 is made of polyethylene resin. The cross-shaped interposition 21 extends in the length direction of the LAN cable 20 and separates the anti-twisted wires 8 from each other in a non-contact state.
The cross interposition 21 is twisted along the length direction of the LAN cable 20, and the anti-twisted wires 8 are also twisted while being separated by the cross interposition 21. Here, the total twisting direction of the anti-twisted wire 8 is the right direction.

The inner layer 4 covers the outer periphery of the cable core 9, and is formed by extruding a polyethylene resin having flame resistance.
The first shielding layer 5 and the second shielding layer 6 sequentially cover the outer peripheral side of the inner covering layer 4.
The first shielding layer 5 is formed by laminating and winding a polyester tape on which an aluminum foil is attached and laminated on the outer peripheral surface of the inner covering layer 4. The second shielding layer 6 is composed of a tin-plated annealed copper wire braid.
The outer cover layer 7 covers the outer periphery of the second shielding layer 6 to form the outermost layer of the LAN cable 20. The outer cover layer 7 is made of an oil-resistant polyvinyl chloride resin.

As shown in FIG. 7, one pin contact 22 is crimped to the tip of the insulated wire 12 (conductor 2) of the LAN cable 20.
The connector portion 40 is a portion connected to another connector cable, a connector for connecting a board, or the like, and is installed at both ends of the LAN cable 20. The connector portion 40 is composed of a metal sleeve 42, a coupling nut 44, and a resin insert 46. The coupling nut 44 is extrapolated to the sleeve 42, and the insert 46 is interpolated (inserted) into the sleeve 42.

The resin mold portion 60 is a connection portion between the LAN cable 20 and the connector portion 40, and the portion is molded (coated) with resin.
The cable 1B with a round connector is a so-called overmolded cable in which the LAN cable 20 and the connector portion 40 are covered with a resin mold portion 60.
The resin mold portion 60 has an inner housing 62 and a shielding cylinder 66, and these are embedded inside the resin mold portion 60 in a state where the inner housing 62 is inserted into the shielding cylinder 66.

As shown in FIG. 8A, the inner housing 62 is a resin member having a substantially columnar shape, and a plurality of grooves 64 are formed along the length direction. Here, four grooves 64 are formed corresponding to the number of twists of the anti-twisted wire 8.
As shown in FIGS. 8B and 8C, the insert 46 is formed with a plurality of through holes 48 through which the pin contact 22 is inserted. Here, eight through holes 48 are formed corresponding to the number of the insulated wires 12 of the anti-twisted wire 8.
As shown in FIGS. 8A and 8B, the inner housing 62 is formed with a shaft portion 65 (projection), and the insert 46 is formed with a bearing portion 49 (hole) that receives the shaft portion 49. The LAN cable 20 and the connector portion are formed. In the connection step with 40, the shaft portion 65 is inserted into the bearing portion 49, and the positions of the inner housing 62 and the insert 46 are fixed.
As shown in FIG. 9, the anti-twisted wire 8 is fitted and positioned in the groove 64 in a twisted state, and is inserted into the shielding cylinder 66 in that state.
As shown in FIG. 10, the shielding cylinder 66 is a tubular member for electromagnetically shielding the resin mold portion 60, and is made of copper or a copper alloy. The shielding cylinder 66 has a shape that matches the outer diameters of the LAN cable 20 and the sleeve 42, and both ends thereof are crimped or the like to be fixed to the LAN cable 20 and the sleeve 42.

As shown in FIG. 9, at one end of the cable 1B with a round connector, the green / green / white paired wire 8c exposed from the LAN cable 20 and the blue / blue / white paired wire 8d are in a certain relationship. They are crossed with each other and fitted into the groove 64 of the inner housing 62. Here, the crossing mode of the anti-twisted wires 8c and 8d has a special configuration, and the portion between the anti-twisted wires 8 exposed from the LAN cable 20 and positioned by the inner housing 62 is viewed from a perspective or cross-sectional view. In this state, when the orange / white-orange paired wire 8b is arranged above and the brown / brown-white paired wire 8a is arranged below, the green / green-white paired wire 8c is a blue / blue-white pair. It intersects on the upper side of the stranded wire 8d, and the blue / blue-white paired stranded wire 8d intersects on the lower side of the green / green-white paired stranded wire 8c.
At the other end of the cable 1B with a round connector, the green / green-white anti-twisted wire 8c and the blue / blue-white anti-twisted wire 8d are fitted into the groove 64 of the inner housing 62 without intersecting with each other. ing.

A conductive paint is applied to the surface of the inner housing 62. The conductive paint can be used as long as it is a general-purpose paint that can impart conductivity, and here, a silver conductive paint is applied.
When the inner housing 62 is inserted into the shielding cylinder 66, its surface is in contact with the inner surface of the shielding cylinder 66, and the inner housing 62 and the shielding cylinder 66 are electrically conductive. The inner housing 62 may be made of a conductive metal component, and even in such a case, the surface of the inner housing 62 is brought into contact with the inner surface of the shielding cylinder 66, and the inner housing 62 and the shielding cylinder 66 are electrically contacted with each other. Make it conductive.

Next, a method of manufacturing the cable 1B with a round connector will be described.

The manufacturing method is largely composed of a connecting step between the LAN cable 20 and the connector 40 and a forming step of the resin mold portion 60.
In the process of connecting the LAN cable 20 and the connector 40, first, the shielding cylinder 66 is externally inserted into the LAN cable 20, and the LAN cable 20 is cut to a desired length. Then, the inner layer 4, the first shielding layer 5, the second shielding layer 6, and the outer skin layer 7 are peeled off and removed at the cut portion to expose the anti-twisted wire 8 (insulated wire 12). At this time, the second shielding layer 6 is exposed from the outer layer 7, or is exposed from the outer layer 7 and folded back to the outside. After that, the insulator 3 is peeled off from the tip of the insulated wire 12, and the pin contact 22 is crimped to the conductor 2.
After that, at one end of the LAN cable 20, the orange / white-orange anti-twisted wire 8b is arranged above and the brown / brown-white anti-twisted wire 8a is arranged below, respectively, when the LAN cable 20 is viewed from a perspective or cross-sectional view. Then, in that state, the green / green-white anti-twisted wire 8c is crossed on the upper side of the blue / blue-white anti-twisted wire 8d. At the other end of the LAN cable 20, it is not necessary to cross the stranded wires 8c and 8d.
After that, the anti-twisted wire 8 is fitted into the groove 64 of the inner housing 62 in a twisted state (without untwisting the anti-twisted wire 8). After that, the pin contact 22 is inserted into the through hole 48 of the insert 46, and the inner housing 62 is installed in the insert 46 as it is. After that, the insert 46 and the coupling nut 44 are inserted and removed from the sleeve 42 to connect the LAN cable 20 and the connector portion 40.

In the process of forming the resin mold portion 60, the shielding cylinder 66 is slid from the LAN cable 20 side, and the exposed anti-twisted wire 8 and the inner housing 62 are covered with the shielding cylinder 66. In such a case, one end of the shielding cylinder 66 is brought into contact with the sleeve 42, and the other end of the shielding cylinder 66 is brought into contact with the exposed or folded second shielding layer 6. At the same time, the surface of the inner housing 62 is brought into contact with the inner surface of the shielding cylinder 66. At that position, both ends of the shielding cylinder 66 are crimped or the like to fix the shielding cylinder 66 to the sleeve 42 and the second shielding layer 6. In this state, the second shielding layer 6, the shielding cylinder 66, the inner housing 62, and the sleeve 42 are electrically conductive with each other.
After that, the connection portion between the LAN cable 20 and the connector portion 40 (the portion centered on the shielding cylinder 66) is installed in a certain mold, and the molten resin is injected into the connection portion. When the resin is cured, the mold is removed to form the resin mold portion 60.
By these steps, the cable 1B with a round connector can be manufactured.

According to the above embodiment, similarly to the first embodiment, the anti-twisted wire 8 exposed from the LAN cable 20 is fitted into the groove 64 of the inner housing 62 at the connection portion between the LAN cable 20 and the connector 40. It is aligned and positioned, and is kept in a twisted state even in the groove 64. Therefore, even when the molten resin is injected in the manufacturing process of the cable 1B with a round connector or after the manufacturing is completed (after commercialization), the distance between the pairs of the stranded wires 8 is kept constant, and the cable can be used as a communication cable. The electrical characteristics can be stabilized (see Examples 2 and 3).

At the same time, at one end of the cable 1B with a round connector, the green / green-white anti-twisted wire 8c is crossed on the upper side of the blue / blue-white anti-twisted wire 8d, so that the electrical characteristics (near-end call). The amount of attenuation Next) can be improved (see Examples 2 and 3). This is because when focusing on the green / green-white anti-twisted wire 8c and the blue / blue-white anti-twisted wire 8d, the twisting direction of the anti-twisted wires 8c and 8d is one in the total twisting direction of the anti-twisted wires 8. However, it is presumed that the spacing and relationship between the stranded wires 8c and 8d were properly maintained (to the right).
Further, since the surface of the inner housing 62 is coated with the conductive paint, not only the portion from the second shielding layer 6 of the LAN cable 20 to the sleeve 42 through the shielding cylinder 66 but also the inside of the shielding cylinder 66. Since the shielding effect is exerted and each of the stranded wires 8 can be isolated while being shielded, the electrical characteristics (reflection attenuation amount RL) can be improved (see Example 3).
Both the technical element of crossing the green / green-white anti-twisted wire 8c on the upper side of the blue / blue-white anti-twisted wire 8d and the technical element of imparting conductivity to the inner housing 62 are as in the present embodiment. May be combined and applied at the same time, or only one of them may be selectively applied. The technical elements are either both or depending on the electrical characteristics required for cable 1B with round connector (depending on whether it improves near-end call attenuation Next or reflection attenuation RL). Either one may be applied.

The modes of the inner housing 17 of FIG. 4 and the inner housing 62 of FIG. 8A can be changed as appropriate.
For example, it may be changed to the inner housing 80 of FIG. 11 or may be changed to the inner housing 90 of FIG.
The inner housing 80 of FIG. 11 also has a columnar shape, and a plurality of through holes 82 are formed along the length direction. When the inner housing 80 is applied, the twist of the anti-twisted wire 8 may be partially untwisted, and the insulated wire 12 may be inserted into the through hole 82 for each of the anti-twisted wires 8 for positioning.
The inner housing 90 of FIG. 12 also has a substantially columnar shape, and a plurality of fins 92 are formed along the length direction. When the inner housing 90 is applied, the twist of the anti-twisted wire 8 may be partially untwisted, and the insulated wires 12 may be fitted and positioned between the fins 92 one by one.
In both cases of changing to the inner housing 80 of FIG. 11 and changing to the inner housing 90 of FIG. 12, the insulated wire 12 is fixed and positioned at a fixed position, although the twist of the anti-twisted wire 8 is partially unwound. (The arrangement and spacing between the insulated wires 12 are kept constant), so that the electrical characteristics of the communication cable are ensured.

(1) Preparation of sample Prepare a LAN cable having the same configuration as in Fig. 2 (the LAN cable is 10 gigabit defined in ANSI / TIA-568-D.2, which is a wiring standard of ANSI (American Standards Association). A cable with a round connector was manufactured according to the electrical characteristics of Cat.6A capable of transmission (transmission band up to a frequency of 500 MHz) and the manufacturing method described in the first embodiment.
Here, two types of cables with round connectors are manufactured, and a cable with the inner housing shown in FIG. 4 installed (sample 11) and a cable with the inner housing shown in FIG. 4 intentionally omitted (sample 12) are prepared. bottom.

(2) Electrical property test of samples Each sample was subjected to a patch cord test in accordance with the test standard TIA 568.2-D Patch Cord Cat 6A. The test results are shown in Table 1.

(3) Summary As shown in Table 1, in sample 11, the results of near-end call attenuation Next and reflection attenuation RL were both good, ensuring the electrical characteristics of the communication cable, whereas sample 12 However, the result that can guarantee the characteristic was not obtained.
From the above, positioning the anti-twisted wire exposed from the LAN cable in the inner housing (here, positioning in the inner housing with the anti-twisted wire twisted) ensures the electrical characteristics of the communication cable. It turned out to be useful for.

(1) Preparation of sample Prepare a LAN cable having the same configuration as in FIG. 6 (the LAN cable is 10 gigabits defined in ANSI / TIA-568-D.2, which is a wiring standard of ANSI (American Standards Association). A cable with a round connector was manufactured according to the electrical characteristics of Cat.6A capable of transmission (transmission band up to a frequency of 500 MHz) and the manufacturing method described in the second embodiment.
Here, four types of cables with round connectors are manufactured, and a blue / blue-white paired wire is crossed on the upper side of a green / green-white paired wire at one end (Samples 21 and 22). , The crossing mode was reversed and the green / green-white paired wire was crossed on the upper side of the blue / blue-white paired wire (Samples 23 and 24), respectively.
In Samples 21-24, the inner housing shown in FIG. 11 was used, and the twist of the anti-twisted wire was partially untwisted, and two insulated wires were inserted into the through holes for each of the anti-twisted wires for positioning. In Samples 21-24, no shielding cylinder was installed, and conductivity was not imparted to the inner housing.
As a comparison of Samples 21-24, a sample similar to Sample 12 of Example 1 without an inner housing and a shielding cylinder was also prepared (Sample 20).

(2) Electrical property test of samples Each sample was subjected to a patch cord test in accordance with the test standard TIA 568.2-D Patch Cord Cat 6A. The test results are shown in Table 2.

(3) Summary As shown in Table 2, in Samples 21-24, the near-end call attenuation amount Next and the reflection attenuation amount RL were remarkably improved with respect to Sample 20. This is due to the installation of the inner housing and the positioning of the stranded wire.
In the samples 23 and 24 as compared with the samples 21 and 22, the near-end call attenuation amount Next was significantly improved. This means that the twisting direction of the green / green / white paired wire and the blue / blue / white paired wire matches the total twisting direction of the four pairs of twisted wires (right direction), and the green / green / white paired twist. It is presumed that the distance and relationship between the wire and the blue / blue-white paired wire were properly maintained.
From the above, crossing the green / green-white paired wire on the upper side of the blue / blue-white paired wire at one end of the cable with a round connector improves the electrical characteristics of the communication cable. It turned out to be useful for.

(1) Preparation of sample Prepare a LAN cable having the same configuration as in FIG. 6 (the LAN cable is 10 gigabits defined in ANSI / TIA-568-C.2, which is a wiring standard of ANSI (American Standards Association). A cable with a round connector was manufactured according to the electrical characteristics of Cat.6A capable of transmission (transmission band up to a frequency of 500 MHz) and the manufacturing method described in the second embodiment.
Here, four types of cables with round connectors were manufactured, one in which the inner housing was not coated with conductive paint (samples 31 and 41) and the other in which the inner housing was coated with conductive paint (samples 32 and 42). Was prepared respectively. As the conductive paint, 4817N manufactured by DuPont Co., Ltd. was used.
In Samples 31, 32, 41, and 42, the inner housing shown in FIG. 8A was used, and the anti-twisted wires were fitted into the grooves in a twisted state and positioned by the inner housing.
At the same time, in the samples 31 and 32, the green / green-white paired wire is crossed on the upper side of the blue / blue-white paired wire at one end, and in the samples 41 and 42, the crossing mode is not adopted and the blue / green / white pair is crossed. Blue-white anti-twisted wires were crossed above the green / green-white anti-twisted wires.

(2) Electrical property test of samples Each sample was subjected to a patch cord test in accordance with the test standard TIA Patch Cord Cat.6a. The test results are shown in Table 3.

(3) Summary As shown in Table 3, the reflection attenuation amount RL was improved by about 1 dB in the sample 32 with respect to the sample 31, and the same improvement was observed in the samples 41 and 42.
From the above, it was found that imparting conductivity to the inner housing and bringing the surface into contact with the inner surface of the shielding cylinder is useful for improving the electrical characteristics of the communication cable.

The present invention relates to a cable with a round connector and a method for manufacturing the same, and is useful for improving the electrical characteristics of a communication cable.

1A, 1B Cable with round connector 2 Conductor 3 Insulator 4 Inner cover layer 5 First shield layer 6 Second shield layer 7 Outer layer 8 Paired wire 9 Cable core 10 LAN cable 12 Insulated wire 15 Connector part 16 Resin mold part 17 Inner housing 18 Groove 20 LAN cable 21 Cross interposition 22 Pin contact 40 Connector part 42 Sleeve 44 Coupling nut 46 Insert 48 Through hole 49 Bearing part 60 Resin mold part (connection part)
62 Inner housing 64 Groove 65 Shaft 66 Shielding cylinder 80 Inner housing 82 Through hole 90 Inner housing 92 Fins

Claims (8)

A LAN cable consisting of a twisted pair cable that is a pair of twisted wires,
The connector part connected to the LAN cable and
It has a connection portion between the LAN cable and the connector portion, and has a connection portion.
The connection portion is a cable with a round connector in which an inner housing for positioning the anti-twisted wire exposed from the LAN cable is installed.
The LAN cable is composed of four pairs of twisted wires and has different twisted pitches.
In a state where the twisted pair wire is exposed from the LAN cable and is positioned in the inner housing from a perspective view or a cross-sectional view, the twisted pair wire having the second longest twisted pair pitch is upward and the twisted pair pitch. When the longest twisted pair wires are arranged below, the twisted pair wire with the third longest twisted pair pitch intersects on the upper side of the twisted pair wire with the fourth longest twisted pair pitch. Cable with round connector. In the cable with a round connector according to claim 1,
A cable with a round connector, characterized in that the anti-twisted wire is positioned in the inner housing while being twisted. In the cable with a round connector according to claim 2.
A groove for fitting the anti-twisted wire is formed on the side surface of the inner housing, and the round is fitted and positioned in the groove while the anti-twisted wire is twisted. Cable with type connector. In the cable with a round connector according to claim 1,
A cable with a round connector, wherein the anti-twisted wire is partially untwisted and positioned in the inner housing. In the cable with a round connector according to claim 4.
A through hole for inserting the anti-twisted wire is formed in the inner housing, or a fin for fitting the anti-twisted wire is formed on a side surface of the inner housing.
A cable with a round connector, characterized in that the anti-twisted wire is partially untwisted and inserted through the through hole for positioning, or fitted and positioned between the fins. In the cable with a round connector according to any one of claims 1 to 5.
A shielding cylinder through which the inner housing is inserted is installed in the connection portion, and a conductive paint is applied to the surface of the inner housing, or the inner housing is made of a conductive metal part. Being done
A cable with a round connector, characterized in that the surface of the inner housing is in contact with the inner surface of the shielding cylinder when the inner housing is inserted into the shielding cylinder. A LAN cable consisting of a twisted pair cable that is a pair of twisted wires,
The connector part connected to the LAN cable and
It has a connection portion between the LAN cable and the connector portion, and has a connection portion.
A method for manufacturing a cable with a round connector in which an inner housing for positioning a pair of twisted wires exposed from the LAN cable is installed at the connection portion.
A step of connecting the LAN cable and the connector portion while exposing the anti-twisted wire from the LAN cable and keeping the anti-twisted wire positioned in the inner housing.
In a method for manufacturing a cable with a round connector , which comprises a step of injecting a molten resin into a connection portion between the LAN cable and the connector portion to form the connection portion.
The LAN cable is composed of four pairs of twisted wires and has different twisted pitches.
In the step of connecting the LAN cable and the connector portion, the twisted pair wire is exposed from the LAN cable, the twisted pair wire having the second longest twisted pair pitch is placed upward, and the twisted pair wire having the longest twisted pair pitch is placed upward. The twisted pair wire having the third longest twisted pitch was crossed on the upper side of the twisted pair wire having the fourth longest twisted pair pitch, and the twisted pair wire was positioned on the inner housing. A method for manufacturing a cable with a round connector, which comprises connecting the LAN cable and the connector in the same state. In the method for manufacturing a cable with a round connector according to claim 7.
A shielding cylinder through which the inner housing is inserted is installed in the connection portion, and a conductive paint is applied to the surface of the inner housing, or the inner housing is made of a conductive metal part. Being done
In the step of forming the connection portion, the shielding cylinder is arranged at the connection portion between the LAN cable and the connector, the surface of the inner housing is brought into contact with the inner surface of the shielding cylinder, and the molten resin is connected to the connection portion. A method for manufacturing a cable with a round connector, which comprises injecting a cable to form the connection portion.

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