Cable arrangement

Abstract

Cable arrangement (2) comprising a shield connector (17) containing a braid crimp piece (17b) and a sheath crimp piece (17c), a cable (10) containing a braid (13) and a sheath (14), and a sleeve (16) attached to an outer circumference of the braid (13), wherein the cable arrangement (2) is shaped such that: the sleeve (16) is arranged by crimping on the outer circumference of the braid (13), the mesh (13) is folded back on a front end face (16d) of the sleeve (16) by a back-folding section (13a), the mesh (13) folded back by the refold section (13a) covers an outer circumference of the sleeve (16), the braid crimp piece (17b) of the shielding connection (17) is crimped to the outer circumference of the sleeve (16) via the braid (13) folded back by the back-folding section (13a) and the braid (13) folded back by the back-folding section (13a) is held between the sleeve (16) and the braid crimp piece (17b), a sheath crimp piece (17c) of the shield connection (17) is crimped to an outer circumference of the sheath (14) of the cable (10), when a tensile force is applied in a direction in which the cable (10) is separated relative to the shield connection (17), the sleeve (16) is moved in a tensile direction so that a rear end edge (16e) of the sleeve (16) and a front end edge (17d) of the sheath crimp piece (17c) are brought into contact with each other, wherein the sleeve (16) further comprises a plurality of projections (16a) in its center, an engagement recess (16b) on one end face and an engagement projection (16c) on the other end face, and the engagement projection (16c) is fitted into the engagement recess (16b) when the sleeve (16) is crimped onto the outer circumference of the braid (13), and wherein a distance (t) in the axial direction is formed between the rear end edge (16e) of the sleeve (16) and the front end edge (17d) of the jacket crimp piece (17c).

Description

Technical field

[0001] The present invention relates to a cable arrangement of a shield connector, such as a high-speed transmission connector. background

[0002] Japanese patent application publication No. JP 2018-63795A discloses a shielded twisted pair connector (STP connector) as a shielding connector formed with a shielded twisted pair of cables.

[0003] Document CN 1 07 591 641 A relates to a coaxial connector comprising an outer conductor, a main body, and a crimp section crimped to the periphery of a folded-back fabric portion of a coaxial cable; a contact section crimped to a center conductor of the cable; an insulating layer, etc. The coaxial connector also has an inner sleeve attached to the outside of the insulating layer and connected to the outer conductor. The inner sleeve is provided with a contact piece that is in contact with the folded-back fabric portion and is free to expand.

[0004] Document JP 2005 - 190 941 A concerns a shielding connection structure between a shielded cable, such as a shielded twisted electrical cable, which is a transmission cable mounted in a vehicle in a LAN system.

[0005] Document CN 1 06 207 544 A concerns an external cylinder connection for a vehicle device or the like of a motor vehicle and a connector with the external cylinder connection. Summary

[0006] In the case of the STP connector disclosed in Japanese patent application no. JP 2018-63795A, there is a possibility that a shielding conductor, such as a braided wire, could become misaligned within a cylindrical section. In the worst-case scenario, the shielding conductor could fall out of the cylindrical section if a tensile force is applied in a direction that separates the STP cable from the outer conductor. Therefore, there is a concern that the electrical connection reliability between the outer conductor and the shielding conductor, such as a wire braid, within the STP cable could be reduced due to this misalignment.

[0007] An objective of the present invention is to provide a cable arrangement with high electrical connection reliability that is able to prevent a cable from separating relative to a shield connector, even when a tensile force is applied in a direction in which the cable is separated relative to the shield connector.

[0008] According to one embodiment of the present invention, a cable arrangement comprises a shield connector containing a braid crimp piece and a sheath crimp piece, a cable containing a braid and a sheath, and a sleeve attached to an outer circumference of the braid.In the cable assembly, the sleeve is arranged by crimping on the outer circumference of the braid. The braid is folded back at a front end face of the sleeve by a back-folding section. The braid folded back by the back-folding section covers an outer circumference of the sleeve. The braid crimp piece of the shield connector is crimped over the braid folded back by the back-folding section to the outer circumference of the sleeve. The braid folded back by the back-folding section is held between the sleeve and the braid crimp piece. A sheath crimp piece of the shield connector is crimped to an outer circumference of the cable sheath. When a tensile force is applied in a direction that separates the cable relative to the shield connector, the sleeve is moved in a tensile direction so that a rear end edge of the sleeve and a front end edge of the sheath crimp piece are brought into contact with each other.The sleeve further features a multitude of projections in its center, an engagement recess on one end face, and an engagement projection on the other end face. The engagement projection fits into the engagement recess when the sleeve is crimped to the outer circumference of the braid. An axial gap is formed between the rear end edge of the sleeve and the front end edge of the sleeve crimp piece.

[0009] Preferably, the sheath crimp piece is crimped to the outer circumference of the sheath such that an inner diameter of the braid in a crimped section of the sheath crimp piece is equal to or substantially equal to an inner diameter of the braid in an uncrimped section of the sheath.

[0010] Preferably the sleeve is formed in a C-shaped plate, and the C-shaped sleeve is crimped cylindrically to the outer circumference of the braid.

[0011] Preferably, the cable arrangement further comprises an inner housing to which a terminal connected to an exposed inner conductor is attached at one end of the cable, and a suitable impedance adjustment element with an insertion hole into which the inner conductor is inserted, wherein the inner housing and the suitable element are integrally housed in a shield connection section of the shield connector.

[0012] According to the above configuration, it is possible to provide a cable arrangement with high electrical connection reliability that is able to prevent a cable from separating relative to a shield terminal, even when a tensile force is applied in a direction in which the cable is separated relative to the shield terminal. Brief description of the drawings Fig. Figure 1 is a perspective view showing an example of a shield connector with a cable arrangement according to an embodiment of the present invention. Fig. Figure 2 is a perspective exploded view of the cable arrangement. Fig. Figure 3 is a perspective view showing a state before the assembly of an inner housing and a matching element of the cable arrangement. Fig. Figure 4 is a perspective view showing a state before the installation of a connector at one end of a cable in the cable assembly. Fig. Figure 5 is a front view of the cable arrangement. Fig. Figure 6 is a cross-sectional view along line VI-VI in Fig. 5. Fig. Figure 7 is a cross-sectional view along line VII-VII in Fig. 5. Fig. Figure 8 is an enlarged cross-sectional view of a major part of the cable arrangement. Detailed description

[0013] A cable arrangement according to an embodiment of the present invention is described in more detail below with reference to the drawings.

[0014] As in Fig. As shown in Figure 1, a shield connector 1 includes a cable assembly 2 for high-speed transmission, which is connected to one end of a shielded twisted pair (STP) electrical wire, which is a cable 10, and an outer housing 3 for receiving the cable assembly 2. That is, the shield connector 1 is a high-speed transmission connector for differential communication and has an electromagnetic shielding structure.

[0015] As in Fig. As shown in Figure 1, an outer housing 3 is formed in a box shape from resin and contains an assembly housing section 3a for receiving the cable assembly 2. A locking arm 3c, which maintains a fitted state when the outer housing 3 is attached to a mating connector (not shown), is provided on an upper surface 3b of the outer housing 3.

[0016] As in the Fig. 1 and Fig. As shown in Figure 2, the cable arrangement 2 comprises a cable 10, a metallic socket connector (terminal) 15, a sleeve 16, a shield connector 17, an inner housing 18 and a suitable impedance adjustment element 19 as components.

[0017] As in the Fig. 2, Fig. 4 and Fig. As shown in Figure 7, the cable 10 contains two twisted inner wires 11, a metal braid 13 covering the two inner wires 11 over a shielding foil 12, and a jacket 14, which is an outer resin coating covering the braid 13. Each inner wire 11 comprises a metal core wire 11a and a resin insulating foil 11b covering the core wire 11a. The two inner wires 11 exposed at the end 10a of the cable 10 are twisted, and a pair of core wire crimp pieces 15b of a jack connector 15 is crimped to the core wire 11a exposed by the respective insulating foils 11b. The socket connector 15 includes a contact section 15a with which a tab of a plug connector of a mating plug (not shown) is electrically connected to the front of the pair of core wire crimp pieces 15b. In the Fig. 2 and Fig. The pair of core wire crimp pieces 15b shown in the socket connector 15 in a crimped form is shown.

[0018] As in the Fig. 2 and Fig. As shown in Figure 4, a metal sleeve 16 is formed into a C-shaped plate before crimping and is attached to an outer circumference of the braid 13 where part of a sheath 14 of the cable 10 has been cut off and exposed. The C-shaped sleeve 16 includes a plurality of projections 16a in the middle, an engagement recess 16b at one end, and an engagement projection 16c at the other end. As shown in the Fig. 6 and Fig. As shown in Figure 8, when a braided crimp piece 17b of a shield terminal 17 described later is crimped to a folded-back braid 13A of the cable 10, the folded-back braid 13A is positioned next to a front end edge 17d of a jacket crimp piece 17c from the front in the braided crimp piece 17b. That is, as shown in Fig. 4 and Fig. As shown in Figure 7, the C-shaped sleeve 16 is arranged on the outer circumference of the braid 13 by being crimped into a cylindrical shape while covered with the folded-back braid 13A, with the engagement projection 16c fitting into the engagement recess 16b. That is, as shown in the Fig. 6, Fig. 7 to Fig. As shown in Figure 8, the braid 13 is folded back to a rear end edge 16e by a back-fold section 13a at a front end 16d of the sleeve 16, which is crimped in a cylindrical shape, and the braid 13A folded back at the back-fold section 13a covers an outer circumference of the cylindrical sleeve 16.

[0019] As in Fig. As shown in Figure 2, the shielding terminal 17 is formed by sheet metal fabrication using a sheet metal material. The shielding terminal 17 comprises a cylindrical housing section 17a, which serves as a shield connection section to accommodate an inner housing 18 and a matching element 19. The shielding terminal 17 includes a pair of braid crimp pieces 17b for crimping and joining the braid 13, which is exposed by cutting away part of the jacket 14 of the cable 10, and a pair of jacket crimp pieces 17c for crimping and joining the jacket 14 of the cable 10. As shown in Figure 2, the shielding terminal 17 comprises a cylindrical housing section 17a, which serves as a shield connection section to accommodate an inner housing 18 and a matching element 19. The shielding terminal 17 includes a pair of braid crimp pieces 17b for crimping and joining the braid 13, which is exposed by cutting away part of the sheath 14 of the cable 10, and a pair of sheath crimp pieces 17c for crimping and joining the sheath 14 of the cable 10. Fig. As shown in Figure 6, the braid crimp piece 17b of the shielding terminal 17 crimps the sleeve 16, which is crimped to the outer circumference of the braid 13 protruding from the sheath 14, while simultaneously crimping and connecting the braid 13A, which has been folded back by the foldback section 13a covering the outer circumference of the sleeve 16. That is, the braid crimp piece 17b is crimped to the outer circumference of the sleeve 16 over the braid 13A folded back by the foldback section 13a. The braid 13A, folded back by the foldback section 13a, is held by the sleeve 16 and the braid crimp piece 17b, and the shielding terminal 17 and the braid 13 are electrically connected.

[0020] In the detailed description of the crimp connection between cable 10 and shield terminal 17, as in Fig. 6, Fig. 7 to Fig. As shown in Figure 8, the sheath crimp piece 17c of the shield connection 17 is crimped to the outer circumference of the sheath 14 of the cable 10.

[0021] The cable 10 is held (fixed) at the shield connection 17 by crimping the braid crimp piece 17b over the braid 13A, which is folded back at the return section 13a, to the sleeve 16, and furthermore by crimping the sheath crimp piece 17c to the sheath 14. In this case, as in Fig. 6 and Fig. As shown in Figure 8, the rear end edge 16e of the sleeve 16 and the front end edge 17d of the sleeve crimp piece 17c are abutting each other. This means that there is a certain distance t in the axial direction between the rear end edge 16e of the sleeve 16 and the front end edge 17d of the sleeve crimp piece 17c. In the Fig. The shield connection 17 shown in Figure 2 is the pair of braid crimp pieces 17b and the pair of sheath crimp pieces 17c in a crimped form.

[0022] As in Fig. 2, Fig. 3 and Fig. As shown in Figure 6, an inner housing 18 made of resin is formed in an elliptical cylindrical shape and comprises a pair of right and left terminal housing chambers 18a on both sides of the inner housing 18. Each socket terminal 15, which is connected to the end of the cable 10, is inserted into the pair of right and left terminal housing chambers 18a. The socket terminal 15 housed in the respective terminal housing chambers 18a is held by a locking element (not shown). In the center of the rear side of an upper surface 18b and a lower surface 18c of the inner housing 18, an engagement groove (engagement recess) 18d is formed into which a pair of engagement projections 19b and 19c of the resin-formed matching element 19, which will be described later, is pressed.

[0023] As in the Fig. 6 and Fig. As shown in Figure 7, the appropriate element 19 is a dielectric for impedance adjustment and is inserted between the inner housing 18 and the sleeve 16 to suppress impedance mismatch and improve the transmission performance of the cable assembly 2 of the shield connector 1. As shown in the Fig. 2 and Fig. As shown in Figure 3, the matching element 19 for impedance adjustment is formed in a resin cylindrical shape with a pair of insertion holes 19a into which untwisted sections of the inner wires 11, crimped to the two socket terminals 15, are inserted. Furthermore, the matching element 19 is provided on the front face of the center of its upper and lower sections with an engagement projection (engagement section) 19b, which is pressed into the upper and lower engagement groove 18d of the inner housing 19. The engagement groove 18d and the engagement projection 19b provide engagement means for assembling the inner housing 18 and the matching element 19. As shown in Figure 3, the matching element 19 is formed in a resin cylindrical-lindrical shape with a pair of insertion holes 19a into which untwisted sections of the inner wires 11, crimped to the two socket terminals 15, are inserted. Fig. As shown in Figure 7, the inner housing 18 and the matching element 19, which are assembled, are housed in the cylindrical housing section 17a of the shielding terminal 17 and are held in place by locking means comprising a locking piece section 17e and a locking recess section 19d. Instead of the matching element 19, which is a dielectric, a metallic element, which is a conductor, can also be used.

[0024] Next, the assembly of the individual components that make up the cable arrangement 2 described above will be described.

[0025] First, part of the sheath 14 of the end 10a of the cable 10 is cut off to expose the braid 13, and the sleeve 16 is crimped cylindrically onto the outer circumference of the exposed braid 13. As in Fig. As shown in Figure 4, an end section of the braid 13 is folded back towards the rear end edge 16e, so that the braid 13A folded back at the back-folding section 13a of the braid 13 covers the outer circumference of the cylindrical sleeve 16.

[0026] Next, the core wire crimp piece 15b of the jack connector 15 is crimped to the core wire 11a protruding from each insulating foil 11b of the two inner wires 11 that extend towards the end face 10a of the cable 10. Then, the two jack connectors 15 are inserted into the pair of insertion holes 19a of the matching impedance adjustment element 19 and housed in the pair of connector housing chambers 18a of the inner housing 18.

[0027] Then the engagement projection 19b of the matching element 19 is pressed into and held in the engagement groove 18d of the inner housing 18, and the inner housing 18, together with the matching element 19, is placed in the housing section 17a of the shielding connector 17. Next, the braid crimp piece 17b of the shielding connector 17 is crimped to the braid 13A folded back at the back-fold section 13a of the braid 13 of the cable 10, and the sheath crimp piece 17c is crimped to the sheath 14 of the cable 10 to secure the Fig. 1 and Fig. 6. To complete the cable arrangement shown in section 2.

[0028] According to cable arrangement 2 of the above embodiment, as shown in Fig. Figure 6 shows that even when a tensile force is applied in the direction P in which the cable 10 is separated from the shielding terminal 17, the cable 10 is prevented from being separated from the sheath crimp 17c of the shielding terminal 17.

[0029] In particular, as in Fig. Figure 6 shows that when the cable assembly 2 is transported as a shield connector 1 for a high-speed transmission connector or mounted on a vehicle, a tensile force is applied in the direction P in which the cable 10 is separated relative to the shield connector 17. In this case, as the sleeve 16 moves in the tensile direction P, the rear end edge 16e of the sleeve 16 and the front end edge 17d of the jacket crimp piece 17c of the shield connector 17 are brought into contact. This contact occurs when the cable 10 is pulled, the folded-back section 13a of the braid 13 presses the rear end of the sleeve 16 in the tensile direction P, and the sleeve 16 is displaced in the tensile direction P. By crimping the braid crimp piece 17b with the sleeve 16 over the folded-back braid 13A and by crimping the sheath crimp piece 17c with the sheath 14, the cable 10 is fixed to the shield connection 17 to ensure a holding force of the cable 10.Therefore, it is prevented that the cable 10 becomes relatively separated (misaligned) from the shielding terminal 17, even if a tensile force is exerted on the cable 10 by the system. This prevents the electrical connection reliability between the shielding terminal 17 and the braid 13 in the cable 10 from being compromised due to misalignment, thus increasing the electrical connection reliability. Since misalignment is prevented, the holding force of the cable 10 in the cable assembly 2 is also improved.

[0030] In this way, when a tensile force is applied to the cable 10 in the cable arrangement 2, the rear end edge 16e of the sleeve 16 and the front end edge 17d of the sheath crimp piece 17c of the shield connection 17 are brought into contact with each other, thereby further securing the holding force of the cable 10.

[0031] As in Fig.As shown in Figure 8, in the crimped state of the sheath 14 in the sheath crimp piece 17c, the inner diameter B of the braid 13 in the crimped section of the sheath crimp piece 17c is the same as the inner diameter A of the braid 13 in the uncrimped section of the sheath 14. Alternatively, the sheath crimp piece 17c is crimped to the outer circumference of the sheath 14 such that it is essentially the same. That is, the sheath crimp piece 17c is crimped to the outer circumference of the sheath 14 such that the relationship "inner diameter B of the braid 13 = inner diameter A of the braid 13 or inner diameter B of the braid 13 ≒ inner diameter A of the braid 13" is satisfied. Furthermore, as the crimping of the sheath crimp piece 17c increases, the inner diameter B of the braid 13 becomes smaller and the holding force increases, but the inner diameter B of the braid 13 < inner diameter A of the braid 13 applies, so that the impedance of the cable 10 is mismatched in the axial direction.However, since in cable arrangement 2 the following applies: “Inner diameter B of the braid 13 = inner diameter A of the braid 13 or inner diameter B of the braid 13 ≒ inner diameter A of the braid 13”, a mismatch of the impedance can be prevented while simultaneously ensuring the holding force of the cable 10.

[0032] Next, a comparative example of the present invention is described. A shielded twisted pair connector (STP) according to a comparative example of the present invention is provided with an outer conductor (shield connector) in an STP dielectric. In the outer conductor, a shield conductor, such as a wire braid, which surrounds and shields a pair of twisted wires of the STP cable, is crimped and crimped to a cylindrical section.

[0033] However, if a tensile force is applied in the STP connector, as in the comparative example, in a direction where the STP cable is relatively separated from the outer conductor, the shielding conductor, such as the braided wire, can become misaligned from the cylindrical section, and in the worst case, the shielding conductor can detach from the cylindrical section. Therefore, there is a concern that the reliability of the electrical connection between the outer conductor and the shielding conductor, such as the braided wire, in the STP cable will be reduced due to this misalignment.

[0034] Although the present embodiment of the present invention has been described previously, the present embodiment is not limited to it, and various modifications can be made within the scope of the core of the present embodiment.

[0035] That is, according to the present embodiment, the sleeve has a C-shaped plate before crimping and is formed in a cylindrical shape after crimping, but may have a cylindrical shape before crimping.

[0036] While certain embodiments have been described, these embodiments serve only as examples and are not intended to limit the scope of the inventions. Indeed, the new embodiments described herein can be embodied in many other forms; moreover, various omissions, substitutions, and modifications in the form of the embodiments described herein can be made without departing from the spirit of the inventions. The appended claims and their equivalents are intended to cover such forms or modifications that would fall within the scope and spirit of the inventions.

Claims

[1] Cable assembly (2) comprising a shield connector (17) containing a braid crimp piece (17b) and a sheath crimp piece (17c), a cable (10) containing a braid (13) and a sheath (14), and a sleeve (16) attached to an outer circumference of the braid (13), wherein the cable assembly (2) is shaped such that: the sleeve (16) is arranged by crimping on the outer circumference of the braid (13), the mesh (13) is folded back on a front end face (16d) of the sleeve (16) by a back-folding section (13a), the mesh (13) folded back by the refold section (13a) covers an outer circumference of the sleeve (16), the braid crimp piece (17b) of the shielding connection (17) is crimped to the outer circumference of the sleeve (16) via the braid (13) folded back by the back-folding section (13a) and the braid (13) folded back by the back-folding section (13a) is held between the sleeve (16) and the braid crimp piece (17b), a sheath crimp piece (17c) of the shield connection (17) is crimped to an outer circumference of the sheath (14) of the cable (10), when a tensile force is applied in a direction in which the cable (10) is separated relative to the shield connection (17), the sleeve (16) is moved in a tensile direction so that a rear end edge (16e) of the sleeve (16) and a front end edge (17d) of the sheath crimp piece (17c) are brought into contact with each other, wherein the sleeve (16) further comprises a plurality of projections (16a) in its center, an engagement recess (16b) on one end face and an engagement projection (16c) on the other end face, and the engagement projection (16c) is fitted into the engagement recess (16b) when the sleeve (16) is crimped onto the outer circumference of the braid (13), and wherein a distance (t) in the axial direction is formed between the rear end edge (16e) of the sleeve (16) and the front end edge (17d) of the jacket crimp piece (17c). [2] Cable arrangement (2) according to claim 1, wherein the sheath crimp piece (17c) is crimped to the outer circumference of the sheath (14) such that an inner diameter (B) of the braid (13) in a crimped section of the sheath crimp piece (17c) is equal to or substantially equal to an inner diameter (A) of the braid (13) in an uncrimped section of the sheath (14). [3] Cable arrangement (2) according to claim 1, wherein the sleeve (16) is formed in a C-shaped plate and the C-shaped sleeve (16) is crimped cylindrically to the outer circumference of the braid (13). [4] Cable arrangement (2) according to any one of claims 1 to 3, further comprising an inner housing (18) to which a terminal (15) connected to an exposed inner wire (11) is attached at one end (10a) of the cable (10), and a suitable impedance adjustment element (19) with an insertion hole (19a) into which the inner wire (11) is inserted, wherein the inner housing (18) and the matching element (19) are housed in one piece in a shielding connection section (17a) of the shielding connection (17).

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