阅读说明：本技术 线缆组件 (Cable assembly ) 是由 大福亮介 宫胁孝治 于 2021-06-17 设计创作，主要内容包括：本发明涉及线缆组件。在编织层(13)的外周紧固有套筒(16),编织层(13)在套筒(16)的前端部(16d)侧利用折返部(13a)而折返,该折返后的编织层(13A)覆盖套筒(16)的外周,屏蔽端子(17)的编织层压接片(17b)经由折返后的编织层(13A)而紧固在套筒(16)的外周,折返后的编织层(13A)被套筒(16)和编织层(17b)夹持,护套压接片(17)被紧固在护套(14)的外周,在向使线缆(10)相对于屏蔽端子(17)相对分离的方向(P)施加了拉伸力的情况下,套筒(16)向拉伸方向(P)移动,从而套筒(16)的后端缘(16e)与护套压接片(17)的前端缘(17d)抵接。(The present invention relates to a cable assembly. A sleeve (16) is fastened to the outer periphery of the woven layer (13), the woven layer (13) is folded back by a folded-back section (13a) on the side of the front end section (16d) of the sleeve (16), the braid (13A) after being folded back covers the outer periphery of the sleeve (16), the braid crimping piece (17b) of the shield terminal (17) is fastened to the outer periphery of the sleeve (16) through the braid (13A) after being folded back, the braid (13A) after being folded back is clamped by the sleeve (16) and the braid (17b), the sheath crimping piece (17) is fastened to the outer periphery of the sheath (14), when a tensile force is applied in a direction (P) in which the cable (10) is relatively separated from the shield terminal (17), the sleeve (16) moves in the tensile direction (P), the rear end edge (16e) of the sleeve (16) is thereby brought into contact with the front end edge (17d) of the sheath pressing piece (17).)

1. A cable assembly provided with a shield terminal having a braid crimping piece and a sheath crimping piece, a cable having a braid and a sheath, and a sleeve mounted on an outer periphery of the braid,

the sleeve is arranged on the outer periphery of the braid by fastening,

the woven layer is folded back via a folded-back portion at the front end portion side of the sleeve,

the braided layer folded back via the folded-back portion covers the outer periphery of the sleeve,

the braid crimping piece of the shield terminal is fastened to the outer periphery of the sleeve via the braid folded back via the folded-back portion, and the braid folded back via the folded-back portion is sandwiched between the sleeve and the braid crimping piece,

the sheath crimping piece of the shield terminal is fastened to an outer periphery of the sheath of the cable, and

the cable assembly is formed as: when a tensile force is applied in a direction in which the cable is relatively separated from the shield terminal, the sleeve moves in the tensile direction, and a rear end edge of the sleeve abuts against a front end edge of the sheath crimping piece.

2. The cable assembly of claim 1,

the cable assembly is formed as follows: the sheath crimping piece is fastened to the outer periphery of the sheath in such a manner that the inner diameter of the woven layer in the fastened portion of the sheath crimping piece is equal or substantially equal to the inner diameter of the woven layer in the unfastened portion of the sheath.

3. The cable assembly of claim 1,

the sleeve is formed in a C-plate shape, and the C-plate shaped sleeve is cylindrically fastened to an outer periphery of the braid.

4. The cable assembly of claim 1 or 3,

the sleeve has an engaging recess on one end side and an engaging projection on the other end side, and the engaging projection is fitted into the engaging recess when the sleeve is fastened to the outer periphery of the braid.

5. The cable assembly of any one of claims 1 to 4,

the cable assembly further includes an inner housing to which a terminal connected to an internal electric wire exposed at a terminal of the cable is attached, and a matching member for impedance adjustment, which has an insertion hole through which the internal electric wire is inserted, and which is a component part

The inner housing and the mating member are integrally accommodated within a shield connecting portion of the shield terminal.

Technical Field

The present invention relates to a cable assembly of a shield connector such as a high-speed transmission connector.

Background

Japanese patent laid-open No. 2018-63795 discloses an STP connector as a shielded connector provided with a Shielded Twisted Pair (STP) cable.

Disclosure of Invention

Technical problem to be solved by the invention

However, in the STP connector of japanese patent application laid-open No. 2018-63795, when a tensile force is applied to the STP cable in a direction of relative separation from the outer conductor, there is a possibility that the shield conductor such as a braided wire is displaced with respect to the cylindrical portion, or in the worst case, the shield conductor is separated from the cylindrical portion. Therefore, there is a concern that the electrical connection reliability between the outer conductor and the shield conductor such as the braided wire of the STP cable may be lowered due to the displacement or the like.

The invention aims to provide a cable assembly with high electrical connection reliability, which can prevent a cable from being separated from a shielding terminal even if tensile force is applied in the direction of separating the cable from the shielding terminal.

Means for solving the problems

The cable assembly according to an embodiment includes a shield terminal having a braid crimping piece and a sheath crimping piece, a cable having a braid and a sheath, and a sleeve attached to an outer periphery of the braid, the cable assembly being characterized in that the sleeve is disposed on the outer periphery of the braid by fastening, the braid is folded back via a folded-back portion on a front end portion side of the sleeve, the outer periphery of the sleeve is covered with the braid folded back via the folded-back portion, the braid crimping piece of the shield terminal is fastened to the outer periphery of the sleeve via the braid folded back via the folded-back portion, the braid folded back via the folded-back portion is in a state of being sandwiched between the sleeve and the braid crimping piece, and the sheath crimping piece of the shield terminal is fastened to the outer periphery of the sheath of the cable, and the cable assembly is formed as: when a tensile force is applied in a direction in which the cable is relatively separated from the shield terminal, the sleeve moves in the tensile direction, and a rear end edge of the sleeve abuts against a front end edge of the sheath crimping piece.

Preferably, the cable assembly is formed as: the sheath crimping piece is fastened to the outer periphery of the sheath in such a manner that the inner diameter of the woven layer in the fastened portion of the sheath crimping piece is equal or substantially equal to the inner diameter of the woven layer in the unfastened portion of the sheath.

Preferably, the sleeve is formed in a C-plate shape, and the C-plate shaped sleeve is cylindrically fastened to an outer periphery of the braid.

Preferably, the sleeve has an engaging recess on one end side and an engaging projection on the other end side, and the engaging projection is fitted into the engaging recess when the sleeve is fastened to the outer periphery of the braid.

Preferably, the cable assembly further includes, as components, an inner housing to which a terminal connected to an internal electric wire exposed at a distal end of the cable is attached, and a matching member for impedance adjustment having an insertion hole through which the internal electric wire is inserted, the inner housing and the matching member being integrally accommodated in a shield connecting portion of the shield terminal.

Effects of the invention

According to the above configuration, it is possible to provide a cable assembly having high electrical connection reliability, which can prevent the cable from being relatively separated from the shield terminal even if a tensile force is applied in a direction in which the cable is relatively separated from the shield terminal.

Drawings

Fig. 1 is a perspective view showing an example of a shielded connector using a cable assembly according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view of the cable assembly.

Fig. 3 is a perspective view showing a state before the inner case and the mating member of the cable assembly are assembled.

Fig. 4 is a perspective view showing a state before the terminal is assembled to the end of the cable assembly.

Fig. 5 is a front view of the cable assembly.

Fig. 6 is a sectional view taken along line VI-VI in fig. 5.

Fig. 7 is a sectional view taken along line VII-VII in fig. 5.

Fig. 8 is an enlarged cross-sectional view of a main portion of the cable assembly.

Detailed Description

Hereinafter, a cable assembly according to an embodiment of the present invention will be described in detail with reference to the drawings.

As shown in fig. 1, the shielded connector 1 is used for high-speed transmission, and includes: a cable assembly 2 connected to an end of a cable 10, i.e., a Shielded Twisted Pair (STP) wire; and a housing 3 accommodating the cable assembly 2. That is, the shielded connector 1 is a high-speed transmission connector for differential communication, and has an electromagnetic shielding structure.

As shown in fig. 1, the housing 3 is formed of resin into a box shape, having a component accommodating portion 3a that accommodates the cable component 2. A lock arm 3c for maintaining a fitted state when fitted to a counterpart connector, not shown, is provided on the upper surface 3b side of the housing 3.

As shown in fig. 1 and 2, the cable assembly 2 includes a cable 10, a female terminal (terminal) 15 made of metal, a sleeve 16, a shield terminal 17, an inner case 18, and a matching member 19 for impedance adjustment as constituent members.

As shown in fig. 2, 4, and 7, the cable 10 includes: 2 twisted internal wires 11, 11; a metal braid 13 covering the 2 inner wires 11, 11 via a shield foil 12; and a sheath 14 which is an outer covering made of resin and covers the braided layer 13. Each inner wire 11 has a metal core wire 11a and a resin insulating sheath 11b covering the core wire 11 a. Then, the 2 inner wires 11 and 11 exposed on the terminal 10a side of the cable 10 are untwisted, and the pair of core wire crimping pieces 15b and 15b of the female terminal 15 are crimped and connected to the core wires 11a exposed from the respective insulating sheaths 11b by fastening. The female terminal 15 has a contact portion 15a on the front side of the pair of core wire crimping pieces 15b, which is electrically connected to a protruding piece of a male terminal of a counterpart connector, not shown. In addition, in the female terminal 15 shown in fig. 2 and 4, a shape in which the pair of core wire crimping pieces 15b, 15b are fastened is shown.

As shown in fig. 2 and 4, the sleeve 16 is made of metal, has a C-shaped plate shape before being fastened, and is attached to the outer periphery of the braid 13 exposed by cutting a part of the sheath 14 of the cable 10. The C-plate shaped sleeve 16 has a plurality of convex portions 16a at the center, an engaging concave portion 16b at one end side, and an engaging convex portion 16C at the other end side. As shown in fig. 6 and 8, after the braid pressing piece 17b of the shield terminal 17 described later is fastened to the folded braid 13A of the cable 10, the folded braid 13A is disposed from the front side inside the braid pressing piece 17b to a position adjacent to the front end edge 17d of the sheath pressing piece 17 c. That is, as shown in fig. 4 and 7, the C-shaped plate-shaped sleeve 16 is arranged on the outer periphery of the woven layer 13 by being cylindrically fastened, and the sleeve 16 is covered with the folded-back woven layer 13A in a state where the engaging convex portions 16C are fitted into the engaging concave portions 16 b. That is, as shown in fig. 6 to 8, the braid 13 is folded back toward the rear end edge 16e side via the folded-back portion 13A at the front end portion 16d of the sleeve 16 fastened to be cylindrical, and the braid 13A folded back at the folded-back portion 13A covers the outer periphery of the cylindrical sleeve 16.

As shown in fig. 2, the shield terminal 17 is formed by sheet metal working using a sheet metal material. Also, the shield terminal 17 has a cylindrical housing accommodating portion 17a serving as a shield connecting portion for accommodating the inner housing 18 and the mating member 19. Further, the shield terminal 17 includes: a pair of braid crimping pieces 17b, 17b for fastening and connecting the braid 13 exposed by cutting off a part of the sheath 14 of the cable 10; and a pair of sheath crimping pieces 17c, 17c which are fixedly connected to the sheath 14 of the cable 10. As shown in fig. 6, braid crimping pieces 17b of shield terminal 17 fasten sleeve 16 fastened to the outer periphery of braid 13 exposed from sheath 14, and also fasten braid 13A folded at folded portion 13A covering the outer periphery of sleeve 16. That is, the braid pressing piece 17b is fastened to the outer periphery of the sleeve 16 through the braid 13A folded at the folded portion 13A. Then, braid 13A folded back at folded-back portion 13A is sandwiched between sleeve 16 and braid pressing piece 17b, and shield terminal 17 and braid 13 are electrically connected.

As shown in fig. 6 to 8, the sheath crimping piece 17c of the shield terminal 17 is crimped to the outer periphery of the sheath 14 of the cable 10. Further, the braid crimping pieces 17b are fastened to the sleeve 16 via the braid 13A folded at the folded portion 13A, and the sheath crimping pieces 17c are further fastened to the sheath 14, whereby the cable 10 is held (fixed) with respect to the shield terminal 17. In this case, as shown in fig. 6 and 8, the rear end edge 16e of the sleeve 16 is adjacent to the front end edge 17d of the sheath crimping piece 17 c. That is, there is some gap t in the axial direction between the rear end edge 16e of the sleeve 16 and the front end edge 17d of the sheath crimping piece 17 c. In the shield terminal 17 shown in fig. 2, a shape in which a pair of braid crimping pieces 17b, 17b and a pair of sheath crimping pieces 17c, 17c are fastened is shown.

As shown in fig. 2, 3, and 6, the inner housing 18 is formed of synthetic resin into an elliptical cylinder shape, and has a pair of left and right terminal accommodating chambers 18a, 18a on both sides thereof into which the female terminals 15 connected to the ends of the cable 10 are inserted. The female terminals 15 accommodated in the terminal accommodating chambers 18a are held by a locking mechanism, not shown. Further, an engagement groove (engagement recess) 18d into which a pair of engagement projections 19b and 19b of a resin mating member 19 described later are press-fitted is formed in the center of the rear side of the upper surface 18b and the lower surface 18c of the inner case 18.

As shown in fig. 6 and 7, the matching member 19 is a dielectric for impedance adjustment, and is interposed between the inner housing 18 and the sleeve 16 to suppress impedance mismatch and improve transmission performance of the cable assembly 2 of the shielded connector 1. As shown in fig. 2 and 3, the impedance adjustment matching member 19 is formed in a resin tube shape, and has a pair of insertion holes 19a and 19a through which the twisted portions of the internal electric wires 11 and 11 press-connected to the 2 female terminals 15 and 15 are inserted. Further, engaging projections (engaging portions) 19b that press-fit into the upper and lower engaging grooves 18d, 18d of the inner case 18 are provided on the front side of the center of the upper and lower portions of the mating member 19, respectively. These engaging groove 18d and engaging projection 19b constitute an engaging mechanism for integrating the inner housing 18 and the mating member 19. As shown in fig. 7, the integrated inner housing 18 and mating member 19 are housed in the cylindrical housing portion 17a of the shield terminal 17, and are held by a locking mechanism including a locking piece portion 17e and a locking recess portion 19 d. Instead of the matching member 19 as a dielectric, a metallic member as a conductor may be used.

Next, the procedure of assembling the components constituting the cable assembly 2 will be described.

First, a part of the jacket 14 of the terminal 10a of the cable 10 is cut off to expose the braid 13, and the sleeve 16 is fastened to the outer periphery of the exposed braid 13 in a cylindrical shape. Then, as shown in fig. 4, the end portion of the knitted layer 13 is folded back toward the rear end edge 16e so that the knitted layer 13A folded back at the folded-back portion 13A of the knitted layer 13 covers the outer periphery of the cylindrical sleeve 16.

Next, the core wire crimping pieces 15b of the female terminal 15 are crimped and connected to the core wires 11a of the 2 inner wires 11, 11 exposed on the terminal 10a side of the cable 10 exposed from the respective insulation covers 11b by a fastening process. Thereafter, the 2 female terminals 15, 15 are inserted into the pair of insertion holes 19a, 19a of the matching member 19 for impedance adjustment, and accommodated in the pair of terminal accommodation chambers 18a, 18a of the inner housing 18.

Then, the engaging projection 19b of the mating member 19 is press-fitted into and held by the engaging groove 18d of the inner housing 18, and the inner housing 18 integrated with the mating member 19 is accommodated in the housing accommodating portion 17a of the shield terminal 17. Thereafter, the braid crimping pieces 17b of the shield terminal 17 are fastened to the braid 13A of the cable 10 after the folded portion 13A of the braid 13 is folded, and the sheath crimping pieces 17c are further fastened to the sheath 14 of the cable 10, thereby completing the cable assembly 2 shown in fig. 1 and 6.

According to the cable assembly 2 of the above embodiment, as shown in fig. 6, even if a tensile force is applied in the direction P of separating the cable 10 with respect to the shield terminal 17, the cable 10 can be prevented from being relatively separated with respect to the sheath crimping pieces 17c of the shield terminal 17.

Specifically, as shown in fig. 6, when the cable assembly 2 is transported or the like, or when the shielded connector 1 for a high-speed transmission connector is mounted on a vehicle or the like, a tensile force may be applied in a direction P in which the cable 10 is separated from the shield terminal 17. In this case, by moving the sleeve 16 in the pulling direction P, the rear end edge 16e of the sleeve 16 abuts against the front end edge 17d of the sheath crimping piece 17c of the shield terminal 17. This contact is caused by the cable 10 being pulled, the folded portion 13a of the braided layer 13 pressing the rear end portion of the sleeve 16 in the pulling direction P, and the sleeve 16 being displaced in the pulling direction P. The braid crimping pieces 17b are fastened to the sleeve 16 via the braid 13A after being folded back, and the sheath crimping pieces 17c are fastened to the sheath 14, whereby the cable 10 is fastened to the shield terminal 17 and the holding force thereof is secured. Therefore, even if a tensile force is applied to the cable 10 due to the abutment, the cable 10 can be prevented from being relatively separated (displaced) from the shield terminal 17. Therefore, it is possible to prevent the electrical connection reliability between the shield terminal 17 and the braid 13 of the cable 10 from being lowered due to the displacement, and to improve the electrical connection reliability. Further, since the displacement is prevented, the holding force of the cable assembly 2 to the cable 10 can also be improved.

In this way, in the cable assembly 2, when the tensile force is applied to the cable 10, the rear end edge 16e of the sleeve 16 abuts against the front end edge 17d of the sheath crimping piece 17c of the shield terminal 17, and the holding force of the cable 10 is further secured.

In addition, as shown in fig. 8, in the fastened state of the sheath crimping pieces 17c to the sheath 14, the inner diameter B of the braided layer 13 in the fastened portion of the sheath crimping pieces 17c is equal to the inner diameter a of the braided layer 13 in the portion of the sheath 14 which is not fastened. Alternatively, the sheath crimping pieces 17c are fastened to the outer periphery of the sheath 14 in a substantially equal manner. That is, sheath crimping piece 17c is fastened to the outer periphery of sheath 14 so that "inner diameter B of braid 13 is equal to inner diameter a of braid 13 or inner diameter B of braid 13 is approximately equal to inner diameter a of braid 13". Further, the larger the amount of tightening of the sheath crimping pieces 17c, the smaller the inner diameter B of the braid 13, the higher the holding force, but the "inner diameter B of the braid 13 < inner diameter a of the braid 13" becomes, resulting in impedance mismatching of the cable 10 in the axial direction. However, in the cable assembly 2, since "the inner diameter B of the braid 13 is equal to the inner diameter a of the braid 13 or the inner diameter B of the braid 13 is approximately equal to the inner diameter a of the braid 13", it is possible to prevent impedance mismatch while securing the holding force of the cable 10.

Next, a comparative example will be described. The Shielded Twisted Pair (STP) connector according to the comparative example includes an outer conductor (shield terminal) in an STP dielectric body, and the outer conductor is connected by crimping by fastening a shield conductor such as a braided wire that surrounds and shields a twisted pair of electric wires of an STP cable by a cylindrical portion.

However, in the STP connector of the comparative example, when a tensile force is applied in a direction in which the STP cable is relatively separated from the outer conductor, the shield conductor such as a braided wire may be displaced with respect to the cylindrical portion, or in the worst case, the shield conductor may be detached from the cylindrical portion. Therefore, there is a concern that the electrical connection reliability between the outer conductor and the shield conductor such as the braided wire in the STP cable may be lowered due to the misalignment or the like.

The present embodiment has been described above, but the present embodiment is not limited to this, and various modifications can be made within the scope of the present embodiment.

That is, according to the above embodiment, the sleeve has a C-shaped plate shape before fastening and has a cylindrical shape after fastening, but may have a cylindrical shape such as a cylindrical shape from before fastening.