Electrical connector for diversity antennas

Abstract: An electrical connector includes a male electrical connector (2) having a plurality of male contact terminals (16, 18) and a plurality of male antennas connection terminals (22); a female electrical connector (3) having a plurality of female contact terminals (53) for contact with said male contact terminals and a plurality of female antennas connection terminals (65) for contact with said male antennas connection terminals; a terminal support portion (40) provided on front end of said terminal aperture for supporting a front end of said female contact terminal; and said female contact terminals having a stopper portion (57) in a middle portion thereof, a hook portion (58) behind said stopper portion, a contact strip (59) extending backwardly and upwardly from a front bottom end and then downwardly to form a V-shaped contact portion, with a free end of said contact strip engaged with said hook portion, and a front end (61) supported by said means when said female contact terminal is fitted into said terminal aperture.

Description: Background of the Invention Field of the Invention The present invention relates to electrical connectors for establishing a contact between antennas connection terminals as well as between contact terminals ( see for example FR - A - 2 612 001). Description of the Prior Art Electrical connectors of this type are used to connect cables for transmitting signals to receivers from antennas which are mounted on moving objects such as automobiles. However, most of the conventional electrical connectors are used to connect a cable of a single antennas. Fig. 25 to 28 show an electrical connector according to the preamble of claim 1. Fig. 25 shows such a conventional male connector 80 which includes an insulation housing 82 with a fitting cavity 83 having a pair of insulation walls 84. An antennas terminal mount 85 is provided on the upper left-hand corner of the insulation housing 82. A number of male terminals 86 are mounted at predetermined intervals on opposite sides of each insulation walls 84 for serving as signal terminals or power terminals. An antennas male terminal 87 is mounted on the antennas terminal mount 85. In Fig. 26, the male connector 80 and a board 88 are mounted on a panel 89 with a screw 90 such that a contact pad 87a of the antennas male terminal 87 is brought into contact with the panel 89. In Figs. 27 and 28, a conventional female connector 81 includes an insulation housing 91 with two pairs of insulation walls 92. A number of female terminals 93 are mounted at predetermined intervals on the inner sides of each pair of insulation walls 92 for serving as power terminals or signal terminals. An antennas terminal mount 94 is provided on the upper right-hand corner of the insulation housing 91. An antennas female terminal 95 is mounted in the antennas terminal mount 94. When the female connector 81 is connected to the male connector 80, the insulation walls 92 of the female connector 81 are fitted into the fitting cavity 83 of the male connector 80 so that the signal terminals and the power terminals of the female connector 81 are brought into contact with those of the male connector 80 while the antennas female terminal 95 is brought into contact with the antennas male terminal 85. However, the conventional electrical connector has ordinary spring contact terminals as the female terminals 93 and are merely inserted into terminal channels so that they reflex back upon contact with the male terminals 86, resulting in the low contact pressure. The front end of the female terminals 93 are prone to damage. When the contact pieces of the contact portion deformed under the pressure of a male terminal, they can be deformed beyond the elastic limits, making the deformation plastic. Summary of the Invention Accordingly, it is an object of the invention to provide an electrical connector having contact terminals which do not flex back upon contact, thereby increasing the contact pressure. It is another object of the invention to provide an electrical connector having contact terminals which have a protected front end. It is still another object of the invention to provide an electrical connector which has a device for preventing a plastic deformation of the contact terminals, thus assuring a long service life. According to the invention there is provided an electrical connector according to claim 1. 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 top plan view of a male electrical connector for a diversity antennas according to an embodiment of the invention; Fig. 2 is a front elevational view thereof; Fig. 3 is a bottom plan view thereof; Fig. 4 is a sectional view taken along line 4-4 of Fig. 1; Fig. 4B is a top-front-side perspective view of an insulation housing for the male electrical connector; Fig. 5 is a top plan view of an antennas terminal mount for the male electrical connector; Fig. 6 is a sectional view taken along line 6-6 of Fig. 5; Fig. 7 is a top plan view of a signal or power male terminal for the male electrical connector; Fig. 8 is a side elevational view thereof; Fig. 9 is a top plan view of an antennas male terminal for the male electrical connector; Fig. 10 is a side elevational view thereof; Fig. 11 is a rear elevational view thereof; Fig. 12 is a sectional view of a mounting aperture of the male electrical connector; Fig. 13 is a top plan view of a female electrical connector according to an embodiment of the invention; Fig. 14 is a side elevational view thereof; Fig. 15 is a bottom plan view thereof; Fig. 16 is a sectional view taken along line 16-16 of Fig. 13; Fig. 17 is a sectional view taken along line 17-17 of Fig. 16; Fig. 18 is a top plan view of a female contact terminal for the female electrical connector; Fig. 19 is a side elevational view thereof; Fig. 20 is a bottom plan view thereof; Fig. 21 is a top plan view of an antennas female contact terminal for the female electrical connector; Fig. 22 is a side elevational view thereof; Fig. 23 is a sectional view taken along line 23-23 of Fig. 15; Fig. 24 is the sectional view showing how to bundle a number of cables on the female electrical connector; Fig. 25 is a conventional male electrical connector; Fig. 26 is a sectional view of a mounting aperture of the male electrical connector; Fig. 27 is a bottom plan view of a conventional female electrical connector; and Fig. 28 is a side elevational view thereof. Description of the Preferred Embodiment In Figs. 1-3, a male connector 2 includes an insulation housing 4 which has a rectangular base 4a and a side wall 4b for defining a fitting cavity 5. The side wall 4b has an expanded section 4c making the fitting cavity 5 asymmetric. A fuse mount 4d is provided on the rectangular base 4a in front of the fitting cavity 5 and is made lower than the side wall 4b. A pair of mounting apertures 6 with a pair of slits 6a are provided on the rectangular base 4a across the fuse mount 4d. A short insulation wall 7 and a long insulation wall 8 extend upwardly from the rectangular base 4a and parallel with each other. A pair of antennas terminal mounts 9 are provided on the rectangular base 4a across the short insulation wall 7. The leg portion 20a of the fuse terminal 20 is soldered to the power circuit conductor of a board. A fuse (not shown) is mounted on the fuse mount 4d of the male connector 2 by inserting its leg portion into the terminal apertures 15 so that they comes into contact with the fuse terminals 20. 16 signal terminal channels 10a and four power terminal channels 10b are formed at predetermined intervals on opposite sides of the long insulation wall 8 for receiving male signal contact terminals 16 and male power contact terminals 18, respectively, while 16 signal terminal channels 10a are formed at predetermined intervals on opposite sides of the short insulation wall 7 for receiving male signal contact terminals 16. The side wall 4b discontinues at a pair of openings 12 on the lines which include the antennas terminal mounts 9 and the mounting apertures 6. As best shown in Fig. 4, the terminal channels 10a communicate with press fit apertures 17 in the rectangular base 4a. The male signal terminals 16 are fitted into the press fit apertures 17. A terminal mount 19 is provided on the bottom of the fuse mount 4d for receiving the fuse terminal 20. In Figs. 4 and 4B, a fuse 33 is mounted on the fuse mount 4d such that the leg portions 33a fit into the terminal apertures 15 and come into contact with the contact portions 20b of the fuse terminals 20. In Figs. 5 and 6, the antennas terminal mount 9 includes a core column 13 which has a central aperture 14 for receiving a central conductor and a pair of hooks 13a on the base portion. A pair of openings 14a are formed on opposite sides of the core column 13. In Figs. 7 and 8, the signal or power contact terminal 16, 18 which is to be fitted in the terminal channel 10a, 10b has a press fit portion 16a, 18a to be press fitted into the press fit aperture 17. In Figs. 9-11, the antennas male terminal 22 has a cylindrical terminal body 23 which has press fit portion 23a and a leg portion 23b. A conductor portion 24 extends laterally from the terminal body 23 and terminates with a ring portion 25 with a pair of slits 25a. As shown in Fig. 1, the antennas male terminal 22 is affixed to the insulation housing 4 by fitting the terminal body 23 over the core column 13 while press fitting the leg portion 23b in the opening 14a. At the same time, the conductor portion 24 is fitted in the opening 12 of the side wall 4b while the ring portion 25 is placed on the mounting aperture 6. In Fig. 12, the male connector 2 and a board 26 are mounted on a panel 27 by inserting the side wall 4b of the insulation housing 4 into an opening of the panel 27 so that the housing base 4a is brought into contact with the panel 27, fitting the conductor portion 24 of the antennas male terminal 22 in the opening 12 of the side wall 4b such that the ring portion 25 of the antennas male terminal 22 is placed on the aperture of the panel 27. Thus, the ring portion 25, the panel opening, and the mounting aperture 6 are aligned, with the slits 25a and 6a also aligned. Then, the board 26 is placed upon the housing base 4a such that the aperture 30 of the board 26 is aligned with the mounting aperture 6 of the housing base 4a. Then, planar clip 31 is inserted into the ring portion 25 and the mounting aperture 6 such that the head 31c fits in the slits 25a and 6a while the leg portion 31a comes into contact with the ground conductor of the board 26 with the return 31b. Then, the return 31b is soldered to the ground conductor to secure the male connector 2 and the board 26 to the panel 27. In Figs. 13-15, the female connector 3 includes an insulation housing 34 which has a housing base 34a and a fitting block 34b with a long fitting recess 35 and a short fitting recess 36. Four power terminal channels 37a and 16 signal terminal channels 37b are formed on opposite sides of the long fitting recess 35 at predetermined intervals, and 16 signal terminal channels 37b are formed on opposite sides of the short fitting recess 36 at predetermined intervals. A pair of antennas terminal mounts 42 are formed across the short fitting recess 36 on the fitting block 34b. A cable bundling section 46 is formed on the center of a front portion 45 of the housing base 34a. A pair of terminal mounts 50 are formed across the cable bundling section 46. The terminal mount 50 has a rectangular recess 51 and a pair of slits 52 on opposite ends of the rectangular recess 51. In Figs. 16 and 17, the terminal channels 37a communicate with terminal press fit apertures 38a at the bottom of the fitting recess 35. A pair of terminal supports 40 are provided at opposite sides of the front end of each terminal channel 37a. A lance 41 extends forwardly from the middle of each terminal channel 37a. The antennas terminal mounts 42 have a columnar portion 43 which has an antennas terminal receiving aperture 44. In Figs. 18-20, a female terminal 53 has a substantially U-shaped terminal body 54 with a U-shaped sheath crimping portion 55 and a U-shaped central conductor crimping portion 56. The sheath crimping portion 55 has a pair of crimping tabs 55a while the central conductor crimping portion 56 has a pair of crimping tabs 56a. The terminal body 54 has a pair of bent pieces 54a to form a stopper portion 57 and a similarly structured hook portion 58. The front strip portion 59 of the terminal body 54 is bent backwardly and then downwardly to form a V-shaped contact portion 60. The free end 59a thereof is engages the hook portion 58. The front ends 61a of opposite sides of the terminal body 54 are bent to form a support portion 61 which surrounds the contact portion 60 for protection. The sheath crimping portion 55 and the central conductor crimping portion 56 are crimped to the sheath 62a and the central conductor 62b of a signal line 62. The terminal is then inserted into the terminal channel 37b through the terminal press fit aperture 38b until the front support portion 61 abuts on the terminal support portion 40. The lance 41 engages with the projection 63 of the terminal body 53a. The signal lines 62 connected to the female terminals 53 are bundled with a band 74 of the cable bundling section 46 to be described later. In Figs. 21 and 22, an antennas female terminal 65 has a terminal body 66 which has a U-shaped engaging portion 71, a U-shaped sheath crimping portion 67, and a U-shaped shield crimping portion 68. The engaging portion 71 has a pair of engaging tabs 71a while the sheath crimping portion 67 and the shield crimping portion 68 have a pair of crimping tabs 67a and 68a, respectively. A lance 66a extending upwardly and backwardly from the middle bottom of the terminal body 66. A pair of spring contact pieces 69 and 70 extend forwardly from the middle of the terminal body 66 to form a contact portion 73. The sheath crimping portion 67 and the shield crimping portion 68 are crimped to the sheath 72 and the shield braid 72b to connect the antennas line 72 to the female terminal 65. The contact 75 is attached to the signal line 72c of the antennas line 72. The contact portion 73 of the antennas female terminal 65 and the contact 75 are inserted into the antennas terminal aperture 44 from the back of the housing 34, and the antennas terminal 65 is bent between the contact portion 73 and the shield crimping portion 68 so that the engaging edges 71a of the engaging portion 71 is fitted into the slits 52 of the terminal engaging portion 50. Then, the engaging edges 71a are bent into the recess 51 to affix the antennas female terminal 65 to the housing 34. In Fig. 23, the cable bundling section 46 has a rectangular recess 47 and a pair of openings 48 opposite ends of the rectangular recess 47. The inner side 49 of the opening 48 is made in the form of a semi-circle. As Fig. 24 shows, the band 74 is passed through the apertures 48 to bind the signal lines bundled on the cable bundling section 46. The band 74 is bent along the semi-circular wall 49 so that the band does not become loose after being tightened. The male connector 2 and female connector 3 thus constructed are connected by fitting the fitting block 34b of the female connector 3 into the fitting cavity 5 of the male connector 2 so that the signal terminals and power terminals of both the connectors are brought into contact with each other while the antennas female terminal 65 is brought into contact with the antennas male terminal 20. Since the support portion 61 of the female terminal 53 is supported by the terminal supports 40 of the terminal aperture 38b, the female terminal 53 is prevented from flexing back upon contact with a mating male terminal 16, thereby increasing the contact pressure. The support portion 61 surrounds the front end of the contact portion 60 for protection. Since the stopper portion 57 is formed in the middle of the terminal body 54, the contact pieces 59 of the contact portion 60 is prevented by the stopper portion 57 from being deformed beyond the elastic limits by the mating male terminal 16, thus preventing plastic deformation of the contact pieces 59.

Claims: An electrical connector comprising: a male electrical connector (2) having a plurality of male contact terminals (16, 18) and a plurality of male antennas connection terminals (22); a female electrical connector (3) having a plurality of female contact terminals (53) for contact with said male contact terminals (16, 18) and a plurality of female antennas connection terminals (65) for contact with said male antennas connection terminals (22); means (40) provided on front end of said terminal aperture for supporting a front end of said female contact terminal; characterised in that said female contact terminals (53) have a stopper portion (57) in a middle portion thereof, a hook portion (58) behind said stopper portion, a contact strip (59) extending backwardly and upwardly from a front bottom end and then downwardly to form a V-shaped contact portion, with a free end (59a) of said contact strip (59) engaged with said hook portion (58), and a front end (61a) supported by said means when said female contact terminal is fitted into said terminal aperture.

Inventors: SATO KENSAKU C O HIROSE ELECTR, SHIRAI AKIRA C O HIROSE ELECTR, SATO, KENSAKU, C/O HIROSE ELECTRIC CO., LTD., SHIRAI, AKIRA, C/O HIROSE ELECTRIC CO., LTD.
Applicants: HIROSE ELECTRIC CO LTD, HIROSE ELECTRIC CO., LTD.
Application year: 1991
Main classification: H01R17
IPC codes: H01R24, H01R9, H01R13