Abstract:
An electric power connector and power cable retainer arrangement includes an electric power connector for the connection of the electric plug or socket of an external power cable for power transmission, and a power cable retainer that has a holder base provided at the electric power connector and a clip extended from the holder base for securing the cable of the external power cable in place to prohibit disconnection of the electric plug or socket of the external power cable.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to electric power connectors and more particularly, to an electric power connector and power cable retainer arrangement, which prohibits disconnection of the connected electric plug or electric socket. 
         [0003]    2. Description of the Related Art 
         [0004]    When using an electric appliance, the electric plug of the power cable of the electric appliance must be connected to an electric socket to obtain the necessary working power supply. However, when the user moves the electric appliance or the power cable of the electric appliance is stretched accidentally, the electric plug of the power cable of the electric appliance may be disconnected from the electric socket, causing power supply interruption or resulting in an accident. 
       SUMMARY OF THE INVENTION 
       [0005]    The present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide an electric power connector and power cable retainer arrangement, which prohibits disconnection of the electric plug or socket of the external power cable accidentally, assuring a high level of safety. 
         [0006]    To achieve this and other objects of the present invention, a electric power connector and power cable retainer arrangement comprises an electric power connector for the connection of the electric connector of an external power cable for power transmission, and at least one power cable retainer provided at the electric power connector for securing the cable of the external power cable been connected to the electric power connector to prohibit disconnection of the electric connector of the external power cable from the electric connector. Each power cable retainer comprises a holder base affixed to the electric power connector and a clip extended from the holder base for securing the cable of the connected external power cable. The clip defines a retaining hole and an opening through which the cable of the attached external power cable is set into the retaining hole. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]      FIG. 1  is an oblique elevation of an electric power connector in accordance with a first embodiment of the present invention. 
           [0008]      FIG. 2  illustrates a status of use of the electric power connector in accordance with the first embodiment of the present invention before connection of an external electric plug. 
           [0009]      FIG. 3  corresponds to  FIG. 2 , showing the electric plug connected to the electric power connector. 
           [0010]      FIG. 4  is an oblique elevation of an electric power connector in accordance with a second embodiment of the present invention. 
           [0011]      FIG. 5  illustrates a status of use of the electric power connector in accordance with the second embodiment of the present invention before connection of an external electric plug and an external socket type power extension cable. 
           [0012]      FIG. 6  corresponds to  FIG. 5 , showing the external electric plug and the external socket type power extension cable connected to the electric power connector. 
           [0013]      FIG. 7  is an exploded view of an electric power connector in accordance with a third embodiment of the present invention. 
           [0014]      FIG. 8  is an elevational assembly view of the electric power connector in accordance with the third embodiment of the present invention. 
           [0015]      FIG. 9  illustrates a status of use of the electric power connector in accordance with the third embodiment of the present invention before connection of an external electric plug. 
           [0016]      FIG. 10  corresponds to  FIG. 9 , showing the electric plug connected to the electric power connector. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0017]    Referring to  FIG. 1 , an electric power connector and power cable retainer arrangement in accordance with a first embodiment of the present invention is shown comprising an electric power connector  2  and a power cable retainer  1  provided at the electric power connector  2 . 
         [0018]    The power cable retainer  1  has a holder base  11  formed integral with a part (for example, the rear part of the electrically insulative housing) of the electric power connector  2  and a clip  12  extended from the holder base  11 . The clip  12  and the holder base  11  define a retaining hole  13  and an opening  14 . The opening  14  is defined between the free end of the clip  12  and the holder base  11 . 
         [0019]    The electric power connector  2  according to this embodiment is an electric socket, having an extension cable  21  extending out of the rear side thereof and insertion holes  22  located on the front side thereof. The holder base  11  is formed integral with a part of the electric power connector  2  adjacent to the extension cable  21 . 
         [0020]    Referring to  FIGS. 2 and 3 , when connecting an electric plug  3  to the electric power connector (electric socket)  2 , insert the metal contact blades  32  of the electric plug  3  into the insertion holes  22  of the electric power connector (electric socket)  2  to keep the electric power connector (electric socket)  2  and the electric plug  3  in an electrically connected condition, then turn the power cable  31  of the electric plug  3  toward the electric power connector (electric socket)  2  and force the power cable  31  through the opening  14  into the retaining hole  13 . When forcing the power cable  31  of the electric plug  3  into the opening  14 , the clip  12  will be temporarily deformed for allowing the power cable  31  of the electric plug  3  to be moved into the retaining hole  13 . Immediately after the power cable  31  entered the retaining hole  13 , the clip  12  returns to its former shape subject to its elastic material property, thereby holding down the power cable  31 . Thus, if the user, either intendedly or accidentally, moves the electric or electronic apparatus (not shown) to which the power cable  31  of the electric plug  3  is connected, the friction resistance produced between the power cable  31  of the electric plug  3  and the clip  12  prohibits disconnection of the electric plug  3  from the electric power connector (electric socket)  2 . 
         [0021]      FIGS. 4˜6  illustrate an electric power connector and power cable retainer arrangement in accordance with a second embodiment of the present invention. According to this second embodiment, the electric power connector comprises an electric power connector  2  and a plurality of power cable retainers  1  provided at the electric power connector  2 . The electric power connector  2  according to this second embodiment is a multi-outlet socket having multiple sets of insertion holes  22  for power input and a set of metal contact blades  23  for power output. Each power cable retainer  1  has a holder base  11  formed integral with a part (of the electrically insulative housing) of the electric power connector  2  and a clip  12  extended from the holder base  11 . The clip  12  and the holder base  11  define a retaining hole  13  and an opening  14 . The opening  14  is defined between the free end of the clip  12  and the holder base  11 . When a socket type power extension cable  4  is connected to the metal contact blades  23 , the power cable  41  of the socket type power extension cable  4  is forced through the opening  14  of the clip  12  of one of the power cable retainers  1  into the retaining hole  13  of the respective clip  12 . When the metal contact blades  32  of an electric plug  3  are into one set of insertion holes  22  of the electric power connector  2 , the power cable  31  of the electric plug  3  is forced through the opening  14  of the clip  12  of another power cable retainer  1  into the retaining hole  13  of the respective clip  12 . Thus, the electric plug  3  and the socket type power extension cable  4  will not be disconnected from the electric power connector  2  accidentally. 
         [0022]      FIGS. 7˜10  illustrate an electric power connector and power cable retainer arrangement in accordance with a third embodiment of the present invention. According to this third embodiment, the electric power connector comprises an electric power connector  2  and a power cable retainer  1 . 
         [0023]    The power cable retainer  1  comprises a holder base  11  having two clamping arms  111 , a clip  12  connected between the two clamping arms  111  of the holder base  11 . The clip  12  and the holder base  11  define a retaining hole  13  and an opening  14 . The opening  14  is defined between the free end of the clip  12  and the holder base  11 . During application, the two clamping arms  111  of the holder base  11  of the power cable retainer  1  are clamped on a part (for example, the rear part of the electrically insulative housing) of the electric power connector  2  and then the free ends of the two clamping arms  111  are fixedly fastened together with screws  112 . Thus, the power cable retainer  1  is firmly secured to the electric power connector  2 . When connecting an electric plug  3  to the electric power connector  2 , insert the metal contact blades  32  of the electric plug  3  into the insertion holes  22  of the electric power connector  2 , and then turn the power cable  31  of the electric plug  3  toward the electric power connector  2  and force the power cable  31  through the opening  14  into the retaining hole  13 . Thus, the power cable  31  of the electric plug  3  is positively secured to the power cable retainer  1 , and the electric plug  3  will not be disconnected from the electric power connector  2  accidentally. 
         [0024]    Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.