Patent Publication Number: US-7896695-B1

Title: Coaxial cable terminal

Description:
BACKGROUND OF THE INVENTION 
     a) Field of the Invention 
     The present invention relates to a connection terminal of a coaxial cable, and more particularly to a coaxial cable terminal which is compatible with all kinds of coaxial cables of various apertures. 
     b) Description of the Prior Art 
     In general, a cable TV at home normally uses a coaxial cable for signal transmission. As being provided with advantages of a large bandwidth and not being easily interfered by noise signals, the coaxial cable has been widely applied to the home TV signal transmission. In addition, also due to the aforementioned merits, a lot of vendors have chosen the coaxial cable as a transmission medium for a broadband network. 
     Referring to  FIG. 7 , it shows a three-dimensional view of a conventional coaxial cable connector. As shown in the drawing, two ends of the conventional coaxial cable connector  3  are provided respectively with an opening  31 , and locations close to the openings  31  are opened respectively with a rectangular notch  32  which forms two clamping arms  33 . Each clamping arm  33  includes a tilted surface  34  which is extended obliquely, and the tilted surface  34  is further extended forward with a contact surface  35 . 
     By the aforementioned structures, a user can insert a coaxial cable terminal  36  into any opening  31  of the coaxial cable connector  3  to clamp the coaxial cable terminal  36  by the contact surfaces  35  of the clamping arms  33 , thereby achieving an effect of signal transmission. 
     Nevertheless, when using the aforementioned coaxial cable connector  3 , following problems and shortcomings actually exist to be improved. 
     As the rectangular notches  32  are too close to two ends of the coaxial cable connector  3 , impurities such as rain or dirt will easily intrude the contact surfaces  35  of the clamping arms  33 , causing oxidation to further result in bad contact. Moreover, the clamping effect is not perfect and when the coaxial cable terminal  36  of a different aperture is inserted, elastic fatigue will be formed easily. 
     Accordingly, how to solve the aforementioned problems and shortcomings of the prior art is a direction of research and development for improvement by the present inventor and related vendors. 
     SUMMARY OF THE INVENTION 
     The primary object of the present invention is to provide a coaxial cable terminal with higher compatibility. 
     To achieve the aforementioned object, the present invention includes an insulating shell and a connection terminal. An interior of the insulating shell is hollow and is thus formed with a holding space. Two ends of the insulating shell are provided respectively with an opening. The connection terminal is accommodated in the holding space and is extended toward one end to form at least two leaves. Each leaf is first bent inward with an abutting section. A tail end of the abutting section is then bent outward to extend with a contact section, and a bonding end is formed between the abutting section and the contact section. 
     As the connection terminal of the present invention is extended toward one end to form at least two leaves, each leaf is first bent inward to form the abutting section and the tail end of the abutting section is then bent outward to extend with the contact section, when a coaxial cable terminal is inserted from the opening at one end of the shell, the coaxial cable terminal will first touch the contact section that is bent outward. At this time, a force is then acted onto the coaxial cable terminal to extend the coaxial cable terminal into the shell, thereby accomplishing the connection of the coaxial cable terminal. On the other hand, the coaxial cable terminal can be clamped by the bonding end which can bond the coaxial cable terminal elastically through elastic abutting of the abutting section. Accordingly, the present invention can be compatible with all kinds of coaxial cable terminals of various apertures and will not be elastically fatigue easily. 
     To enable a further understanding of the said objectives and the technological methods of the invention herein, the brief description of the drawings below is followed by the detailed description of the preferred embodiments. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows a three-dimensional view of a preferred embodiment of the present invention. 
         FIG. 2  shows an exploded view of the preferred embodiment of the present invention. 
         FIG. 3  shows a cutaway view of the preferred embodiment of the present invention. 
         FIG. 4  shows a first schematic view of an implementation of the preferred embodiment of the present invention. 
         FIG. 5  shows a second schematic view of the implementation of the preferred embodiment of the present invention. 
         FIG. 6  shows a third schematic view of the implementation of the preferred embodiment of the present invention. 
         FIG. 7  shows a three-dimensional view of a conventional coaxial cable connector. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to  FIGS. 1 ,  2  and  3 , it shows a three-dimensional view, an exploded view and a cutaway view, of a preferred embodiment of the present invention. As shown in the drawings, the present invention comprises an insulating shell  1 , which is usually made by plastic, an interior of which is hollow and is thus formed with a holding space  11 , and a connection terminal  2 , which is accommodated in the holding space  11 . The insulating shell  1  has an upper end provided with a hole  12  and a lower end provided with an opening. A sleeve  20  has a lower end  201  engaged with an upper end  28  of the connection terminal  2  and has at least two leaves  21 , with each leaf  21  being first bent inward with an abutting section  211 , a tail end of the abutting section  211  being then bent outward to extend with a contact section  212 , and a bonding end  213  being formed between the abutting section  211  and the contact section  212 . A base  5  is engaged with the opening of the lower end of the insulating shell  1  and has a passage  51  which has an intermediate portion provided with a shoulder  511 . The connection terminal  2  has an upper end  28  and a flange  281  close to the upper end  28  of the connection terminal  2 . The upper end  28  of the connection terminal  2  is inserted into the lower end  201  of the sleeve  20  with the flange  281  bearing against a bottom of the lower end  201  of the sleeve  20 . The connection terminal  2  is inserted into the passage  51  of the base  5  with the flange  281  supported by the shoulder  511  of the passage  51  thereby preventing the connection terminal  2  from dropping out of the base  5 . 
     The sleeve  20  has at least one support arm  22 , a tail end of each support arm  22  forms a collar  221 . The lower section of the connection terminal  2  is provided with a connection end  23  for connection. 
     Referring to  FIGS. 3 ,  4 ,  5  and  6 , it shows the cutaway view, a first schematic view of an implementation, a second schematic view of the implementation and a third schematic view of the implementation, of the preferred embodiment of the present invention. As shown in the drawings, when a coaxial cable terminal  24  is to be connected with the present invention, the coaxial cable terminal  24  is inserted into the hole  12  of the insulating shell  1 , and the coaxial cable terminal  24  will first touch the contact section  212  that is bent outward. Next, a force is acted onto the coaxial cable terminal  24 , and then the coaxial cable terminal  24  can be extended into the insulating shell  1  and is bonded by the bonding end  213 . As a result, the connection of the coaxial cable terminal  24  is accomplished, thereby achieving a purpose of signal transmission. As the present invention includes the abutting section  211  that is bent inward, after the coaxial cable terminal  24  has been inserted into the insulating shell  1 , an outer wall of the coaxial cable terminal  24  can be bonded by elastic abutting of the abutting section  211  and by the bonding end  213 . Accordingly, the present invention can be effectively connected with the coaxial cable terminal  24 . 
     Moreover, as shown in  FIG. 6 , the present invention can be also compatible with the coaxial cable terminal  24  of a larger aperture. When the coaxial cable terminal  24  is inserted, the coaxial cable terminal  24  is similarly bonded by the bonding end  213 . In addition, as the sleeve  20  of the present invention is bent outward to extend with the contact section  212 , after the coaxial cable terminal  24  has been inserted into the insulating shell  1 , the contact section  212  will touch an inner wall of the insulating shell  1  due to pushing of the coaxial cable terminal  24 , allowing the contact section  212  and the abutting section  211  to be both provided with an elastic push force of bonding to the coaxial cable terminal  24 , such that the coaxial cable terminal  24  can be more effectively connected. On the other hand, after the coaxial cable terminal  24  has been pulled out, the contact section  212  will restore. By the aforementioned structures, the present invention will not be elastically fatigue easily and thus is provided with a longer life time of usage. 
     Accordingly, referring to all the drawings, the present invention is actually provided with following advantages in comparison with the prior art. 
     The connection terminal  2  of the present invention is engaged with the sleeve  20  which has at least two leaves  21 , each leaf  21  being first bent inward with the abutting section  211 , the tail end of the abutting section  211  is then bent outward to extend with the contact section  212 , and the bonding end  213  is formed between the abutting section  211  and the contact section  212 . By the aforementioned structures, the present invention can be accommodated into all kinds of coaxial cable terminals  24  of various sizes and will not be elastically fatigue easily to have the longer life time of usage. 
     It is of course to be understood that the embodiments described herein is merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.