Abstract:
A flat F-port coaxial electrical connector disclosed herein comprises a connector body and a terminal structure. The connector body has an annular stopper protrusion which is able to engage with a second insulation adapter by inlaying into the outer surface of the second insulation adapter so that the terminal of the conductor body is formed into a flat surface. With this structure, when the electrical connector of the present invention is engaged with a F-type male connector, the mating surface can be maintained in smooth and flat finished state thereby preventing electromagnetic signal leakage.

Description:
BACKGROUND OF THE INVENTION 
     (1) Field of the Invention 
     The present invention relates to a flat F-port coaxial electrical connector, and more particularly, to a flat F-port coaxial electrical connector when the terminal structure is engaged to the connector body, a second insulator adapter of the terminal structure is conjoined to an annular stopper protrusion of the conductor body so that the terminal of the conductor body is formed into a flat surface. With this structure, when the electrical connector of the present invention is engaged with a F-type male connector, the mating surfaces can be maintained in smooth and finished state thereby preventing electromagnetic signal leakage. 
     (2) Description of the Prior Art 
     Recently, the inventor of the present invention acquired a US patent regarding a coaxial cable connector titled “Flat F-port coaxial electrical connector”. This patent is published in U.S. Pat. No. 6,113,431 dated Sep. 5, 2000. In aforesaid patent, an improvement was made to eliminate shortcomings arose from the conventional technique wherein a plastic terminal was directly riveted to the connector body after fitted with an annular collar, and in stead, in the aforesaid patented invention, flat sections at the two extremities of the cable connector body were formed in order to maintain flatness and smoothness when it was engaged with a F-type male connector thereby preventing electromagnetic signal leakage. 
     After being carried out further study and experimentation, the present inventor discovered there is still an improvement can be made for engagement technique of the aforesaid invention between the containment hole and the second insulating adapter so that production cost can be further reduced and manufacturing efficiency more improved, and similarly, there will be formed flat surfaces at both side of the connector body terminal. 
     SUMMARY OF THE INVENTION 
     Accordingly, it is a main object of the present invention to provide a flat F-port coaxial electrical connector having an annular stopper protrusion to be inlaid into and fixedly engaged with a second insulating adapter of the terminal structure. 
     It is another object of the present invention to provide a flat F-port coaxial electrical connector having an annular sleeve provided at a port formed in the connector body so as to form planar surfaces at the connector body terminal, and by engaging the annular sleeve fixedly with the terminal structure, when the connector body is engaged with a F-port male connector, the mating surfaces can be maintained in smooth and finished state thereby preventing electromagnetic signal leakage. 
     For fuller understanding of the nature and objects of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings below. Meanwhile, the accompanying drawings are provided for purposes of reference and explanation, and by no means are construed as limitations applicable to the invention herein. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a cross-sectional drawing of a first embodiment of the present invention; 
     FIG. 2 is a three dimensional exploded view of a first embodiment of the present invention; 
     FIG. 3 is a cross-sectional view of the connector body in a first embodiment of the present invention; 
     FIG. 4 is a cross sectional view of the terminal structure in all three embodiment of the present invention; 
     FIG. 5 is a cross-sectional view of a second embodiment of the present invention; 
     FIG. 6 is a cross-sectional view of the connector body in a second embodiment of the present invention; 
     FIG. 7 is a cross sectional view of the annular sleeve in a second embodiment of the present invention; 
     FIG. 8 is a cross sectional view showing the annular sleeve being in engagement with the connector body in a second embodiment of the present invention; 
     FIG. 9 is a cross sectional view of a third embodiment of the present invention; 
     FIG. 10 is a three-dimensional perspective view of a second insulating adapter in a third embodiment of the present invention; 
     FIG. 11 is a fragmentary drawing of an annular sleeve in a third embodiment of the present invention; and 
     FIG. 12 is a cross sectional view showing the annular sleeve being in engagement with the connector body in a third embodiment of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to FIG.  1  and FIG. 2, simultaneously, the flat F-port coaxial electrical connector in a first embodiment of the present invention comprises a connector body  10  and a terminal structure  20 . 
     Referring to FIG. 3, the connector body  10  further includes a threaded section  11 , a hexagonal section  12 , a first planar section  13 , and a second planar section  14 . A containment hole  15  having a diameter enough to accept the terminal structure  20  is formed in the connector body  10 . The inner space of the containment hole  15  is terminated at an annular flat bottom  16 . An annular stopper protrusion  17  is formed in the container hole  15  near the second planar section  14  so as to detain fixedly the terminal structure  20  thereat, and a conical portion  18  formed at the fringe of the stopper protrusion  17  is for facilitating the terminal structure  20  to slip into the containment hole  15 . 
     As shown in FIG. 4, the terminal structure  20  includes a first insulation adapter  21  and a second insulation adapter  22 . These first and second insulation adapters  21 ,  22  include respectively outer enclosure sections  23 ,  24  and elastic annular clipping sections  25 ,  26 . A tubular contact member  27  is interlaid between the two clipping sections  25 ,  26 . A flare inlet is formed near the terminal of the tubular contact member  27  for accepting insertion of a F-type male connector to achieve electrical connection. Both first and second insulating adapter  21 ,  22  are made of plastic materials such as PE, PP, PC or other rubber. 
     In connecting to a flat F-port coaxial electrical connector with a coaxial cable, at first, inserting the terminal structure  20  into the containment hole  15  of the connector body  10  until the terminal of the first insulation adapter  21  mates with the annular flat bottom  16 . As shown in FIG. 1, the annular stopper protrusion  17  is able to forcibly inlay into the outer surface of the second insulation adapter  22  by a compressive force given rise by properly designed mutually relating size between the containment hole  15  and the second insulation adapter  22 . As a result, the terminal structure  20  can be securely and reliably fixed in the connector body  10  and keep smoothness and flatness of the nearly surfaces where the coaxial electrical connector of the present invention is mating with the F-type male connector. 
     Referring to FIG. 5, the flat F-port coaxial electrical connector in a second embodiment of the present invention comprises a connector body  30 , a terminal structure  20 , and an annular sleeve  40 . 
     Referring to FIG. 6, the connector body  30  further includes a threaded section  31 , a hexagonal section  32 , a first planar section  33 , and a port  34 . A containment hole  35  having a diameter enough to accept the terminal structure  20  is formed in the connector body  30 . The inner space of the containment hole  35  is terminated at an annular flat bottom  36 . An annular groove  37  is formed in the containment hole  35  at the terminal of the port  34 , and the inner portion of the annular groove  37  is terminated at another annular flat bottom  38 . 
     In the second embodiment, the terminal structure  20  also includes a first insulation adapter  21 , a second insulation adapter  22 , and a tubular contact member  27  as shown in FIG.  4 . 
     Referring to FIGS. 4 and 7, the inner portion of the annular sleeve  40  defines a through hole  41  forming an annular stopper protrusion  42  at its end thereof for fixedly detaining the second insulation adapter  22  therewith. The contact surface between the stopper protrusion  42  and the through hole  41  is formed into a conical portion  43  so as to facilitate insertion of the first and the second insulation adapters  21  and  22  into the through hole  41 . 
     In connecting a flat F-port coaxial electrical connector with a coaxial cable, at first, pushing the annular sleeve  40  into the annular groove  37  in the connector body  30  until the terminal of the sleeve  40  mates with the annular flat bottom  38  as so to bring the annular sleeve  40  in engagement with the annular groove  37 . With this structure, the port  34  of the connector body  30  is formed into a planar portion  39  as shown in FIG.  8 . Finally, inserting the terminal structure  20  into the containment hole  35  of the connector body  30  until the terminal of the first insulation adapter  21  mates with the annular flat bottom  36 . As shown in FIG. 5, the annular stopper protrusion  42  is able to forcibly inlay into the outer surface of the second insulation adapter  22  by a compressive force given rise by properly designed mutually relating size between the containment hole  35  and the second insulation adapter  22 . As a result, the terminal structure  20  can be securely and reliably fixed in the connector body  30 . 
     Referring to FIG. 9, the flat F-port coaxial electrical connector in a third embodiment of the present invention comprises a connector body  30 , a terminal structure  50 , and an annular sleeve  60 . 
     As shown in FIGS. 9,  10 , the terminal structure  50  further includes a first insulation adapter  51 , a second insulation adapter  52 , and a tubular contact member  53 . The first and the second insulation adapters  51  and  52  are made of plastic materials. An annular outer enclosure  54  on the second insulator adapter  52  has an annular recessed slot  55  on its outer surface thereof. 
     Referring to FIG. 11, the annular sleeve  60  is made of metallic material; a through hole  61  is formed within the sleeve  60 . An annular stopper protrusion  62  is formed in the through hole  61  so that the stopper protrusion  62  can be inlaid in annular recessed slot  55  of the second insulation adapter  52  and fixed therein. The contact surface between the stopper protrusion  62  and the through hole  61  is formed into a conical portion  63  so as to facilitate insertion of the first and second insulation adapters  51  and  52  into the through hole  61 . 
     In connecting a flat F-port coaxial electrical connector with a coaxial cable, let us refer to FIGS. 6,  11  and  12 , at first, pushing the annular sleeve  60  into the annular groove  37  in the connector body  30  until the terminal of the sleeve  60  mates with the annular flat bottom  38  so as to bring the annular sleeve  60  in engagement with the annular groove  37 . With this structure, the port  34  of the connector body  30  is formed into a planar portion  39 . Finally, inserting the terminal structure  50  into the through hole  61  of the sleeve  60  until the terminal of the first insulation adapter  51  mates with the annular flat bottom  36 . By so, the annular recessed slot  55  and the stopped protrusion  62  are firming engaged with each other as shown in FIG.  9 . As a result, the terminal structure  50  is securely and reliably fixed in the connector body  30 . 
     While it will be apparent that the preferred embodiments of the invention disclosed are well calculated to provide the advantages and features above stated, it will be appreciated that the invention is susceptible to modification, variation and change without departing from the proper scope or fair meaning of the subjoined claims.