Abstract:
A plug connector includes a housing, a latch member and an actuating member. The housing includes a base portion and a tongue portion extending forwardly from the base portion. The tongue portion has a first surface and is sized to fit within the complementary connector. The base portion has a second surface disposed at a level on the housing that is above the first surface of the tongue portion. The latch member includes an engaging portion attached to the second surface of the base portion and a latching portion extending beyond the base portion and located above the first surface of the tongue portion. The actuating member has an operating portion extending beyond said base portion, a cooperating portion disposed between the latch member and said second surface of the base portion, and an intermediate portion interconnecting the operating portion and the cooperating portion. The actuating member is sized, structured and arranged such that movement of said actuating member away and toward said tongue portion caused the latching portion of the latch member to be raised and lowered relative to the first surface of the tongue portion. The intermediate portion of the actuating member has a portion being sized, structured and arranged such that movement of the actuating member away and toward said tongue portion causing the portion of the intermediate portion to be compressed by the base portion and to provide elastic restoring force to the latching member.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS  
       [0001]     This application is a CA (Continuation Application) of U.S. patent application Ser. No. 11/213048 filed on Aug. 26, 2005 and entitled “PLUG CONNECTOR WITH EMI GASKET”, and closely related to U.S. Pat. No. 7,134,914 and entitled “CABLE CONECTOR ASSEMBLY WITH LATCHING MECHANSIM”, both of which have the same applicant and assignee as the present invention. 
     
    
     BACKGROUND OF THE INVENTION  
       [0002]     1. Field of the Invention  
         [0003]     The present invention generally relates to a plug connector, and more particularly to a plug connector used for high-speed signal transmission.  
         [0004]     2. Description of Related Art  
         [0005]     A committee called SFF is an ad hoc group formed to address storage industry needs in a prompt manner. When formed in 1990, the original goals were limited to define de facto mechanical envelopes within disk drives can be developed to fit compact computer and other small products. Specification SFF-8088 defines matable Compact Multilane Shielded connectors adopted for being used in laptop portable computer to connect small-size disk drives to a printed circuit board. The connectors comprise a plug connector connecting with the small-size drive and a header mounted on the printed circuit board. The plug connector defined in the specification comprises a pair of engagble metal housings together defining a receiving space therebetween, a PCB received in the receiving space, a cable comprising a plurality of conductors electrically connecting with the PCB, and a latching mechanism assembled to a top surface of the upper metal housing. The latching mechanism comprises an elongated T-shape latch member for latching with the header mentioned above and an actuating member cooperating with the latch member for actuating the latch member to separate from the header. The latch member is assembled to a rear portion of a base of the upper housing with latch portion exposed beyond a front portion of the base of the upper housing to locate above a tongue portion of the upper housing. However, such elongated latch member is hard to be actuated by the actuating member, otherwise the latch member must have enough thickness or made by high-quality material having enough rigidity to achieve the goal of latching reliably and unlatching easily.  
         [0006]     Hence, an improved plug connector is provided in the present invention to address the problems mentioned above and meet the current trend.  
       BRIEF SUMMARY OF THE INVENTION  
       [0007]     Accordingly, an object of the present invention is to provide a plug connector with latch mechanism for achieving perfect signal transmission effect.  
         [0008]     In order to achieve the above-mentioned object, a plug connector in accordance with the present invention comprises a housing, a latch member and an actuating member. The housing comprises a base portion and a tongue portion extending forwardly from the base portion. The tongue portion has a first surface and is sized to fit within the complementary connector. The base portion has a second surface disposed at a level on the housing that is above the first surface of the tongue portion. The latch member comprises an engaging portion attached to the second surface of the base portion and a latching portion extending beyond the base portion and located above the first surface of the tongue portion. The actuating member has an operating portion extending beyond said base portion, a cooperating portion disposed between the latch member and said second surface of the base portion, and an intermediate portion interconnecting the operating portion and the cooperating portion. The actuating member is sized, structured and arranged such that movement of said actuating member away and toward said tongue portion caused the latching portion of the latch member to be raised and lowered relative to the first surface of the tongue portion. The intermediate portion of the actuating member has a portion being sized, structured and arranged such that movement of the actuating member away and toward said tongue portion causing the portion of the intermediate portion to be compressed by the base portion and to provide elastic restoring force to the latching member.  
         [0009]     Other objects, advantages and novel features of the invention will become more apparent from the following detailed description of the present embodiment when taken in conjunction with the accompanying drawings. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0010]      FIG. 1  is an exploded, perspective view of a plug connector in accordance with the first embodiment of the present invention;  
         [0011]      FIGS. 2-4  are views similar to  FIG. 1 , but viewed from different angles;  
         [0012]      FIG. 5  is an enlarged view of a gasket of the plug connector of  FIG. 1 ;  
         [0013]      FIG. 6  is a partially assembled view of the plug connector of  FIG. 1 ;  
         [0014]      FIG. 7  is a view similar to  FIG. 6 , but viewed from a different angle;  
         [0015]      FIG. 8  is an assembled view of the plug connector of  FIG. 1 ;  
         [0016]      FIG. 9  is a view similar to  FIG. 8 , but viewed from a different angle;  
         [0017]      FIGS. 10-14  are cross-section views taken along lines  10 - 10  to  14 - 14  of  FIG. 8 ;  
         [0018]      FIG. 15  is partially exploded, perspective view of the plug connector in accordance with the second embodiment of the present invention;  
         [0019]      FIG. 16  an exploded view of a latch mechanism of the second embodiment;  
         [0020]      FIG. 17  is a partially assembled view of the plug connector of the second embodiment;  
         [0021]      FIG. 18  is a cross-section view taken along line  18 - 18  of  FIG. 17 ;  
         [0022]      FIG. 19  is a partially exploded, perspective view of the plug connector in accordance with the third embodiment of the present invention;  
         [0023]      FIG. 20  is an exploded view of a latch mechanism of the third embodiment;  
         [0024]      FIG. 21  is a partially assembled view of the plug connector in accordance with the third embodiment;  
         [0025]      FIG. 22  is a cross-section view taken along line  22 - 22  of  FIG. 21 ;  
         [0026]      FIG. 23  is an exploded, perspective view of a plug connector in accordance with the forth embodiment of the present invention; and  
         [0027]      FIG. 24  is an assembled view of the plug connector of  FIG. 23 . 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0028]     Reference will now be made to the drawing figures to describe the present invention in detail.  
         [0029]     Referring to  FIGS. 1-4 , a plug connector  100  in accordance with the first embodiment of the present invention comprises a housing  1 , a printed circuit board (PCB)  2  located in the housing  1 , a cable  7  with a cable holder  6  electrically connecting with the PCB  2 , a latch mechanism  3  assembled to the housing  1 , a metal shell  4  assembled to the housing  1  to partially cover the latch mechanism  3 .  
         [0030]     Please refer to  FIGS. 1-8 , the housing  1  of the present invention is made of metal material and comprises a base  11 , a cover  12  engagble with the base  11  and a receiving space  15  formed between the base and the cover  11 ,  12 . The metal housing  1  also comprises a rectangular base portion  13  and an elongated tongue portion  14  extending forwardly from the base portion  13 .  
         [0031]     The base  11  comprises a first base section  11   a  and a first tongue section  11   b  extending forwardly from the first base section  11   a.  The first base section  11   a  comprises a first flat portion  110 , a pair of first flanges  112  and a first rear wall  113  extending upwardly from opposite side edges and rear edge of the first flat portion  110 . The front portions of the first flanges  112  are cut to present the first flanges  112  L-shaped. A first substantially semicircular opening  1130  is defined in the first rear wall  113  and a pair of first screw holes  1312  are defined in the first rear wall  113  and located at opposite sides of the first semicircular opening  1130 . A first slit  1120  extends downwardly from a top surface of the first base section  11   a  and into the first flanges  112  and a front portion of the first rear wall  113 . The first tongue section  11   b  comprises a first panel  118  formed with a pair of ribs  114  located at opposite sides thereof. Each rib  114  forms a tip end  1140  extending beyond a front edge of the flat portion  118 . The first panel  118  also forms two pairs of first standoffs  115  spaced arranged thereon, and each first standoff  115  defines a first positioning hole  1150  therein. A pair of U-shape cutouts  117  extend rearward from the front edge of the first panel  118  and respectively locate adjacent to corresponding ribs  1140 .  
         [0032]     The cover  12  comprises a second base section  12   a  and a second tongue section  12   b  extending forwardly from the second base section  12   a . The second base section  12   a  comprises a second flat portion  120 , a pair of second flanges  122  and a second rear wall  123  extending downwardly from opposite side edges and a rear edge of the second flat portion  120 . The rear portions of the second flanges  122  and the second rear wall  123  are cut to present the second flanges  122  L-shaped. A second substantially semicircular opening  1230  is defined in the second rear wall  123 . A pair of second screw holes  1232  are defined through the second rear wall  123  and locate at opposite sides of the second semicircular opening  1230 . Corresponding to the first slit  1120  of the base  11 , a continuous protruding ridge  1220  integrally extend downwardly from inner edges of the second flanges  122  and the second rear wall  123 . The second flat portion  120  defines a first recess section  127  consisting of different-size first and second recesses  1270 ,  1272 , and a deeper and narrower second recess section  128  formed in a front portion of the second flat portion  120  to communicate with a front surface of the second flat portion  120 . A deeper slit  1280  is defined in the front portion of the second flat portion  120  and extends in a direction perpendicular to that of the second recess section  128  to communicate with the second recess section  128 . A transversely-extending bar  1282  is formed at a front end of the second recess section  128  with a pair of projections  1284  arranged thereon. A pair of first channels  121  are respectively defined in opposite sides of the first flat portion  12   a  extending in a back-to-front direction. A pair of rims  129  are formed at the front portion of the first flat portion  12   a.    
         [0033]     The second tongue section  12   b  comprises a second panel  124  formed with a long keyway  1244  and a pair of side walls  125  extending downwardly from opposite sides of the second panel  124 . A pair of second channels  1250  are defined in corresponding side walls  125  opened toward outside for guiding an insertion of a complementary connector (not shown). A pair of protrusions  126  extend rearward from a front surface of the second tongue section  12   b  and respectively locate below the side walls  125  to form a pair of gaps  1260  therebetween. The second panel  124  forms a enhancing portion (not labeled) on a bottom surface thereof for enhancing the strength thereof and three pairs of second standoffs  1240  are symmetrically arranged on the enhancing portion with two pairs of second standoffs  1240  formed with posts  1242  extending downwardly. The first and second standoffs  115 ,  1240  with the first and second positioning holes  1150 ,  1242  are served as first engaging means of the housing  1 . The first engaging means is not limited to the structures described above, it also can be protrusions protruding from the first and second tongue sections  11   b,    12   b , or recesses recessed from the first and second tongue sections  11   b,    12   b.    
         [0034]     The PCB  2  is formed with a plurality of first conductive pads  21  aligned at a front end thereof and a plurality of second conductive pads  22  aligned at an opposite rear end thereof with different amount from that of the first conductive pads  21 . The first and second conductive pads  21 ,  22  electrically connect with one another through inner traces disposed in the PCB  2 . Two pairs of holes  23  served as are symmetrically arranged on the PCB  2  adjacent to the first conductive pads  21 . The holes  23  are served as second engaging means of the PCB  2 . The second engaging means is also not limited to the structures described above, it can be standoffs with holes to receive the respective protrusions of the first engaging means of the housing  1 , or different-shape projections formed on opposite surfaces of the PCB to be received in the recesses of the first engaging means of the housing  1 .  
         [0035]     The latch mechanism  3  comprises a latch member  31  latching with the complementary connector and an actuating member  32  cooperating with the latch member  31  to actuate the latch member  31  to unlatch from the complementary connector.  
         [0036]     The latch member  31  is made of metal material and is a cantilever-type member. The latch member  31  comprises a N-shape engaging portion  310  located in a vertical surface, a flat latching portion  311  located in a horizontal surface perpendicular to the vertical surface and an inclined connecting portion  312  connecting the engaging portion  310  with the latching portion  311  to provide spring force to the latch member  31 . The engaging portion  310  comprises a transverse bar section  3101  and a pair of side sections  3102  extending downwardly from opposite sides of the bar section  3101 . Each side section  3102  is formed with barbs  3104  on outmost edge thereof. The flat latching portion  311  defines a pair of rectangular holes  3110  at a rear portion thereof adjacent to the connecting portion  312  and a pair of latches  3112  bending downwardly from opposite sides of the front edge thereof. The connecting portion  312  connects with middle portion of the bar section  3101  and extends upwardly from a lower edge of the bar section  3101 . The connecting portion  312  also defines a hole therein for adjusting spring force of the latch member  31  through changing size and shape of the hole.  
         [0037]     The actuating member  32  is made by insulative material and comprises a cooperating portion  321 , an elongated intermediate portion  323  extending rearward form the cooperating portion  321  and formed with interference portion  322 , and a ring-shape operating portion  324  formed at a rear end of the intermediate portion  323 . The interference portion  322  comprises a pair of stop sections  3212  formed at opposite sides of the intermediate portion  323  and located adjacent to the cooperating portion  321  and two pairs of elastic sections  3210  formed at middle portion of the intermediate portion  323 . Each elastic section  3210  comprises a transverse block section  3224  and a V-shape spring section  3226  extending rearward from the block section  3224 . The cooperating portion  321  comprises a vertical section  3210  connecting the cooperating portion  321  with the intermediate portion  323  and a body section  3212  extending forwardly from a lower edge of the vertical section  3210 . The body section  3212  forms a pair of upwardly extending ribs  3214  with tip end formed with enlarged protrusions  3216 . A slanted surface  3218  downwardly and rearward extends from a front surface of the body section  3212 .  
         [0038]     The conductive shell  4  comprises a body portion  40  formed with a plurality of bars  400  on a top surface for increasing friction and a pair of L-shape lateral walls  42  extending downwardly from opposite sides of the body portion  40 . A pair of holes  402  and a downwardly-extending first tab  404  are respectively formed in a rear portion and a front edge of the body portion  40 . A pair of second tabs  405  are formed with the body portion  40  extending downwardly from a rear edge of the body portion  40 .  
         [0039]     In assembly, conductors  70  of the cable  7  are respectively soldered to the second conductive pads  22  of the PCB  2 . The PCB  2  with the cable  7  is located on the first standoffs  115  of the base  11  with the holes  23  aligned with the first positioning holes  1150  and the cable  7  is located in the first semicircular opening  1130  of the base  11 . The plug connector  100  of the present invention may have a cable holder  6  grasping a metal braiding area exposed outside of the cable  7  to provide strain relief to the cable  7 . The cover  12  is assembled to the base  11  and the PCB  2  with the posts  1242  protruding through the holes  23  and the first positioning holes  1150  to position the PCB  2  in the receiving space  15  of the housing  1 . The PCB  2  is sandwiched between the base  1  and the cover  12  by the first and second engaging means engaging with each other. The protruding ridge  1220  of the cover  12  is received in the first slit  1120  of the base  11  and the pair of tip ends  1140  received in the gaps  1260 , thus, the base  11  and the cover  12  are also securely assembled together. The first and second screw holes  1132 ,  1232  combine into a screw receiving space  17  ( FIG. 13 ).  
         [0040]     Referring to  FIG. 6  in conjunction with  FIGS. 11-14 , the latch mechanism  3  is assembled to the second base section  12   a  of the cover  12  along a vertical direction perpendicular to the front-to-back direction. The actuating member  32  is firstly pressed to the cover  12 . The cooperating portion  321  of the actuating member  32  is received in the second recess section  128  of the cover  12 , and the intermediate portion  323  with the interference portion  322  are received in the first recess section  127 . The stop sections  3222  and the elastic sections  3220  are respectively sliderably received in the different-size first and second recesses  1270 ,  1272  with the block section  3224  and spring section  3226  respectively abutting against opposite edges of the large-size second recesses  1272 . The latch member  31  is assembled to the cover  12  along the vertical direction and the engaging portion  310  is interferentially received in the slit  1280 . The inclined connecting portion  312  is located on the slanted surface  3218  of the body section  3212  of the cooperating portion  321 . The bar section  3101  of the latch member  31  are located on the ribs  3214  with the enlarged protrusions  3216  located in front of the bar section  3101 . The projections  1284  of the cover  12  are respectively received in the rectangular holes  3110  and the latches  3112  exposed above the second tongue section  12   b.    
         [0041]     When the complementary connector mates with the plug connector  100  of the present invention, contacts of the complementary connector may electrically connect with the first conductive pads  21  of the PCB  2  with corresponding structure thereof latches with the latches  3112  of the latch member  31 . When the plug connector  100  disengages from the complementary connector, a rearward pulling force exerts to the operating portion  324  of the actuating member  31  to actuate the actuating member  32  rearward move with the elastic sections  3220  and the stop sections  3222  sliding in the second and first recesses  1272 ,  1270  until the enlarged protrusions  3216  abut against the bar section  3101  of the latch member  31 . The body section  3212  also rearward moves with the slanted surface  3218  sliding along a bottom periphery of the inclined connecting portion  312 , thus actuating the connecting portion  312  to pivot upwardly relative to the bar section  3101  of the engaging portion  310  and the latch section  311  with the latches  3112  to upwardly move to unlatch from the complementary connector. After the rearward pulling force is removed, restore force of the elastic sections  3220  actuates the actuating member  32  to move forwardly to its original position, and thus, the latch member  31  also reverts to its original position.  
         [0042]     The conductive shell  4  is finally assembled to the second base section  12   a  of the cover  12  with the L-shape lateral walls  42  sliderably received in the first channels  121  of the cover  12  along a back-to-front direction until a front edge of the conductive shell abuts against the rims  129 . The first tab  404  is received in the second recess section  128  of the cover  12  and the second tabs  405  respectively locate on steps formed on rear edge of the cover  12 . The first tab  404  also presses on the latch member  31  to provide extra return force to the latch member  31  when disengaging the plug connector  100  from the complementary connector. A pair of screws  8  are screwed through the holes  402  of the shell  4 , the second screw holes  1232  of the cover  12  and the first screw holes  1132  of the base  11  to retain the shell  4  with the base  11  and the cover  12 .  
         [0043]     The metal housing  1  may define a plurality of splits  16  spaced arranged on the tongue portion  14  adjacent to the front surface of the base portion  13 . The plug connector  100  of the present invention may have an EMI gasket  5  assembled to the metal housing  1  for reducing the Electro Magnetic Interference (EMI) in the signal transmission. The gasket  5  is a rectangular frame and stamped from a metal sheet. The gasket  5  comprises a continuous periphery wall  50  consisting of a pair of opposite longitudinal edges  501  and a pair of side edges  502  respectively connecting with the longitudinal edges  501 . The gasket  5  also defines a space  51  circumscribed by the periphery wall  50 . A plurality of tubers  52 , served as holding means, are spaced arranged on inner edge of the periphery wall  50  and all extend toward the space  51 . A plurality of first spring fingers  503  are stamped corresponding to the tubers  52  formed on the longitudinal edges  501 . Each side edge  502  is formed with a pair of second spring fingers  504  respectively extending toward each other from opposite upper and lower edges thereof. The tubers  52  are respectively received in the splits  16  of the housing  1  for retaining the gasket  5  in the housing  1 . The first and second spring fingers  503 ,  504  are served as contacting means for elastically engaging with a conductive panel to which the complementary connector is mounted for grounding and reducing EMI.  
         [0044]     A cable assembly  200  of the second embodiment of the present invention is illustrated in  FIGS. 15-18 . The difference between the cable assemblies  100 ,  200  exists in the latch mechanisms  3 ,  3 ′. Thus, the description of the same members is omitted here and some same members are omitted in the drawing figures.  
         [0045]     Referring to  FIGS. 15-16 , the latch mechanism  3 ′ of the cable assembly  200  has the substantially same structure as that of the latch mechanism  3  of the cable assembly  100 . The latch mechanism  3 ′ also comprises a latch member  31 ′ and an actuating member  32 ′ cooperating with the latch member  31 ′. The latch member  31 ′ comprises a U-shape engaging portion  310 ′ located in a vertical surface, the flat latching portion  311  located in a horizontal surface perpendicular to the vertical surface and the inclined connecting portion  312  connecting the engaging portion  310 ′ with the latching portion  311 . The latching portion  311  and the connecting portion  312  have the same structures as those of the latch member  31 . Compared with the engaging portion  310 , the engaging portion  310 ′ comprises a transverse bar section  3101 ′ and a pair of side sections  3102 ′ extending upwardly from opposite sides of the bar section  3101 ′. The connecting portion  312  extends upwardly from an upper edge of the middle portion of the bar section  3101 ′.  
         [0046]     The actuating member  32 ′ also has the substantially same structure as that of the actuating member  32  except the cooperating portion  321 ′. The cooperating portion  321 ′ of the second embodiment extends flatly from the intermediate portion  323  and forms a pair of downwardly-extending protruding sections  3210 ′ at tip end thereof. The cooperating portion  321 ′ is partially cut to form a pair of slanted surfaces  3218 ′ on the protruding sections  3210 ′ and a receiving area  3214 ′ to receive a corresponding portion of the latch member  31 ′.  
         [0047]     Corresponding to the structure changes of the latch member  31 ′, the second base section  12   a  of the cover  12  forms a pair of vertical slits  1280 ′ perpendicular to the second recess section  128  and forms a step  1282 ′ corresponding to the position of the slits  1280 ′.  
         [0048]     In assembly (the assembly of other same members are omitted here), referring to  FIGS. 17-18 , the latch member  31 ′ is planted to the housing  1  in the vertical direction and received in the second recess section  128 . The pair of side sections  3102 ′ of the engaging portion  310  are respectively interferentially received in the slits  1280 ′ by the barbs  3104  formed thereon and the bar section  3101 ′ abut against the front surface of the step  1282 ′. The projections  1284  of the cover  12  are received in corresponding rectangular holes  3110  with the latch section  311  exposed above the second tongue section  12   b . The actuating member  32 ′ is assembled to the housing  1  and the latch member  31 ′ first in a front-to-back direction to let the cooperating portion  321 ′ locate below the connecting portion  312  of the latch member  31 ′ and in the second recess section  128 , then in the vertical direction to press other portions of the actuating member  4  to be received in the first recess section  127  of the housing  1  (same as in the first embodiment, omitted here). The connecting portion  312  is received in the receiving area  3214 ′ of the actuating member  32 ′. As to disengage the cable assembly  200  from the complementary connector, a rearward pulling force is exerted to the pulling portion  324  of the actuating member  32 ′. The slanted surfaces  3218 ′ of the cooperating portion  321 ′ slide along the inclined connecting portion  312  of the latch member  31 ′ until the protruding sections  3210 ′ abuts against the bar section  3101 ′ of the latch member  31 ′ to actuate the connecting portion  312  to pivot upwardly relative to the bar section  3101 ′ of the engaging portion  310 ′ and the latch section  311  with the latches  3112  to upwardly move to disengage from the complementary connector. The pair of vertical walls forming the second recess section  128  prevents the pair of protruding sections  3210 ′ of the cooperating portion  321 ′ from moving outwardly when the actuating member  32 ′ is pulled rearward.  
         [0049]     Referring to  FIGS. 19-22 , a plug connector  300  in accordance with the third embodiment of the present invention is illustrated. The latch mechanism  3 ″ of the plug connector  300  also comprises a latch member  31 ″ and an actuating member  32 ″ cooperating with the latch member  31 ″. Same members and structure description are omitted in the specification and in the drawing figures.  
         [0050]     Referring to  FIGS. 19-20 , tip end of the cooperating portion  321 ″ of the actuating member  32 ″ is enlarged and forms an inclined surface  3210 ″ for latching with the latch member  31 ″.  
         [0051]     The latch member  31 ″ comprises a flat connecting portion  312 ″ formed with a pair of rectangular holes  3120 ″, a latch section  311 ′ upwardly then flatly extending from a front edge of the connecting portion  312 ″, an H-shape engaging portion  310 ″ vertically extending from a rear edge of the connecting portion  312 ″, and an inclined portion  313 ′ upwardly and rearward extending from a middle of the engaging portion  310 ″. The engaging portion  310 ″ comprises a pair of vertically-extending side sections  3102 ″ and a transversely-extending bar section  3101 ″ connecting with lower portions of the side sections  3102 ″.  
         [0052]     In assembly, the latch member  31 ″ is assembled to the housing  1 ″, which has the same structure as the housing  1 ′ of the second embodiment, in the vertical direction and received in the second recess section  128 . The side sections  3102 ″ are interferentially received in the slits  1280 ″ via the barbs  3104  formed thereon and the bar section  3101 ″ abuts against the step  1282 ″ in the second recess section  128 . The projections  1284  of the housing  1 ″ are received in the rectangular holes  3120 ″ of the connecting portion  312 ″ and the latch portion  311  with the latches  3112  exposed above the second tongue section  12   b . The actuating member  32 ″ is assembled to the housing  1 ″ and the latch member  31 ″ in the vertical direction. The inclined surface  3210 ″ of the cooperating portion  321 ″ presses on the slanted portion  313 ″ with other portions of the actuating member  32 ″ received in the first recess section  127  as described in the first embodiment.  
         [0053]     When to disengage the plug connector  300  from the complementary connector, a rearward pulling force is exerted to the pulling portion  324  of the actuating member  32 ″, the inclined surface  3210 ″ of the cooperating portion  321 ″ rearward moves and slides along the slanted surface of the slanted portion  313 ″ of the latch member  31 ″. With the pivotal downward movement of the slanted portion  313 ″ relative to the bar section  3101 ″ of the engaging portion  310 ″, the latch portion  311  moves pivotally upwardly relative to the bar section  3101 ″ to disengage from the complementary connector.  
         [0054]      FIGS. 23-25  shows the forth embodiment of the present invention. The assembly  400  of the forth embodiment comprises a pair of cable connector assemblies juxtaposed arranged, each plug connector has the same structure as that of the plug connector  100  of the first embodiment. Of course, the cable connector assemblies  200 ,  300  also can be juxtaposed arranged. The assembly  400  integrates a pair of bases  11  into a base portion  18  and integrates a pair of actuating members  32  into a pulling part  19 . The first flanges  112  of the pair of bases  11  are integrated together and the pair of actuating members  32  uses a common operating portion  324  which integrates the pair of actuating members  22  together. The assembly process is same as that of the cable assembly  100  of the first embodiment and is omitted here. To disengage the assembly  400  from the complementary connector, a rearward pulling force is exerted to the common operating portion  324  to actuate upward movement of the pair of latch sections  311  of the latch members  31 , thus, the assembly  400  disengages from the complementary connector.  
         [0055]     It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.