Electrical connector and method of connecting shielded cable to same

Abstract: A shield jacket (3) for an electrical connector (B) includes a cylindrical contact support portion (6) having an insulation block (4) for supporting a conductor contact (5); a U-shaped shield wire crimping portion (7); a U-shaped outer sheath crimping portion (8); a substantially flat linkage portion (6a) provided between the contact support portion and the shield wire crimping portion. A method of connecting a shielded cable to the above electrical connector, which includes the steps of bending downwardly the shield wire and outer sheath crimping portions at the linkage portion; inserting into the insulation block a conductor contact to which a shielded cable has been connected; bending back the shield wire and outer sheath crimping portions to original positions so that the shield wires and outer sheath are placed in the shield wire and outer sheath crimping portions, respectively; and deforming the shield wire and outer sheath crimping portions to the shield wires and the outer sheath, respectively.

Description: Background of the Invention Field of the Invention The present invention relates to electrical connectors and methods of connecting shielded cables to the electrical connectors. Description of the Prior Art Fig. 13 shows a conventional electrical connector. A length of outer sheath g is removed from a shielded cable a so that shield wires b and a signal line c are separated. The shield wires b are put together into a shield braid and connected to the contact terminal e of a connector proper d. The signal line c is connected by insulation replacement, for example, to the contact terminal f of the connector proper d. However, in the above conventional electrical connector, it is necessary to connect separately the shield wires b and the signal line c to the contact terminals e and f, respectively, making it difficult to mechanize the connection operation. In addition, since some shield wires c are removed from the shielded cable, there is little or no shield effect on the signal line. A shield jacket according to the preamble of claim 1 is known from EP-A-0 432 666. Summary of the Invention Accordingly, it is an object of the invention to provide an electrical connector which makes it easy to connect a shielded cable to a contact terminal and has excellent shield effect. It is another object of the invention to provide a simple method of connecting a shielded cable to a contact terminal. According to one aspect of the invention there is provided a shield jacket for an electrical connector as defined in claim 1. According to another aspect of the invention there is provided a method of connecting a shielded cable to the above electrical connector as defined in claim 2. The above and other objects, features, and advantages of the invention will be more apparent from the following description when taken in conjunction with the accompanying drawings. Brief Description of the Drawings Fig. 1 is a perspective view of electrical connectors before connection; Fig. 2 is a perspective view of a shield jacket for an electrical contact terminal; Fig. 3 is a perspective view of a conductor contact for the electrical contact terminal; Fig. 4 is a side elevational view of the shield jacket of Fig. 2; Fig. 5 is a top plan view of the shield jacket of Fig. 2; Fig. 6 is a perspective view of a shielded cable; Fig. 7 is a side elevational view of the shield jacket prior to bending; Fig. 8 is a side elevational view of the shield jacket with the shielded cable and outer sheath crimping portions bent downwardly; Fig. 9 is a side elevational view of the shield jacket having an insulation block into which the conductor contact of a shielded cable is being inserted; Fig. 10 is a side elevational view of the shield jacket with the shielded cable and outer sheath crimping portions bent back to the original positions; Fig. 11 is a side elevation partly in section of the shield jacket to which a shielded cable is being crimped; Fig. 12 is a perspective view of an electrical contact terminal to which the shielded cable has been connected; and Fig. 13 is a perspective view of a conventional electrical connector to which a shielded cable is connected. Description of the Preferred Embodiment In Fig. 1, an electrical connector A consists of a female connector B and a male connector C. The female connector B consists of a housing D and an electrical contact terminal 1 therein. In Fig. 2, the electrical contact terminal 1 consists of a shield jacket 3, an insulator block 4, and a conductor (signal line) contact 5. The shield jacket 3 has a cylindrical contact support portion 6, a U-shaped shield wire crimping portion 7, and a U-shaped outer sheath crimping portion 8. The shield wire crimping portion 7 and the outer sheath crimping portion 8 have a pair of clamp tabs 12 and a pair of clamp tabs 13, respectively. In Fig. 3, the conductor contact 5 has a contact proper 14, a U-shaped conductor crimping portion 15 for connection with an insulated conductor, and a U-shaped conductor insulation crimping portion 16. The contact proper 14 has a pin-like form. The conductor crimping portion 15 has a pair of crimping tabs 17. The conductor insulation crimping portion 16 has a pair of crimping tabs 18. In Figs. 4 and 5, the insulation block 4 is placed within the contact supporting portion 6 of the shield jacket 3 and has a contact supporting aperture 4a through the center of the insulation block 4. In Fig. 6, the shielded cable 2 has an outer sheath 21, shield wires 22, a conductor insulation 23, and a conductor wire 24. How to connect the shielded cable 2 to the electrical contact terminal 1 will be described with reference to Figs. 7 through 11. The shielded cable 2 is secured to the conductor contact 5 by inserting and crimping the conductor wire 24 and the conductor insulation 23 of the shielded cable 2 to the conductor crimping portion 15 and the insulation crimping portion 16 of a conductor contact 5, respectively. In Figs. 7 and 8, the shielded cable crimping portion 7 and outer sheath crimping portion 8 are bent at a plate-like linkage portion 6a provided between the contact support portion 6 and the shield wire crimping portion 7 by substantially right angles with respect to the contact support portion 6. In Fig. 9, the contact proper 14 of the conductor contact 5 is inserted into the contact support aperture 4a of an insulation block 4. In Fig. 10, the shield wire crimping portion 7 and sheath crimping portion 8 are bent back to the original position at the linkage portion 6a so that the shield wires 22 and outer sheath 21 are placed between the respective crimping tabs 12 and 13 of the shield wire crimping portion 7 and the outer sheath crimping portion 8. In Fig. 11, the crimping tabs 12 and 13 of the shield wire crimping portion 7 and the outer sheath crimping portion 8 are simultaneously crimped to the shield wires 22 and the outer sheath 21 with the crimper dies 26a and 26b and anvils 27a and 27b. Alternatively, the conductor crimping portion 15 may be replaced with an insulation replacement portion. In this case, it is unnecessary to remove a length of conductor insulation 23 so as to expose the conductor wire 24. Two or more conductor contacts 5 may be housed in the shield jacket 3 for a multiconductor cable. As have been described above, the electrical connector and the connection method according to the invention make it easy to connect a shielded cable 2 to a contact terminal. In addition, since it is unnecessary to provide a tool opening for connecting the conductor connection portion, it is possible to make the shield jacket 3 without the tool opening, thereby providing excellent shielding effect.

Claims: A shield jacket for an electrical connector comprising a cylindrical contact support portion (6) including an insulation block (4) provided with a contact supporting aperture (4a) for supporting a conductor contact (5), a U-shaped shield wire crimping portion (7), a U-shaped outer sheath crimping portion (8), a linkage portion (6a) provided between the contact support portion (6) and the U-shaped shield wire crimping portion (7), the conductor contact (5) being adapted to be connected to the conductor (24) of a shielded cable (2) with the conductor (24) extending in the axial direction of the conductor contact (5), the conductor contact (5) being insertable with the conductor connected thereto into said contact supporting aperture (4a) in the direction of the axis of said cylindrical contact support portion (6), characterized in that said linkage portion (6a) is substantially flat and adapted to be bent away from said axis before the insertion of said conductor contact (5) and back towards said axis thereafter. A method of connecting a shielded cable to an electrical connector of claim 1, which comprises the steps of: bending downwardly said shield wire and outer sheath crimping portions (7, 8) at said linkage portion (6a); inserting into said insulation block (4) a conductor contact (5) to which a shielded cable has been connected; bending back said shield wire and outer sheath crimping portions (7, 8) to original positions so that said shield wires (22) and outer sheath (21) are placed in said shield wire and outer sheath crimping portions (7, 8), respectively; and deforming said shield wire and outer sheath crimping portions (7, 8) to said shield wires (22) and said outer sheath (21), respectively.

Inventors: NAKATA NAOHISA, SATO KENSAKU, NAKATA, NAOHISA, SATO, KENSAKU, NAKATA, NAOHISA C/O HIROSE ELECTRIC CO. LTD., SATO, KENSAKU C/O HIROSE ELECTRIC CO. LTD.
Applicants: HIROSE ELECTRIC CO LTD, HIROSE ELECTRIC CO., LTD.
Application year: 1991
Main classification: H01R9
IPC codes: H01R43, H01R24, H01R9, H01R4