Patent Publication Number: US-6334795-B1

Title: Structure of a cordless phone plug

Description:
BACKGROUND OF THE INVENTION 
     (a) Technical Field of the Invention 
     The present invention relates to a cordless phone plug, and in particular, to an insertion-pin positioning member having a specific structure mounted at a space formed between two rows of insertion-pins located at the rear end of a base seat for the phone plug. The phone plug structure simplifies assembling procedures, and the insertion-pins are securely mounted. 
     (b) Description of the Prior Art 
     Cordless phone plugs are widely used in hand phones to provide external charging of battery or hand free operation. The basic structure of such a conventional plug is a standard plug mounted to a standard insertion slot located at the bottom section of the plug such that the two corresponding terminals of the phone and the plug are mounted to each other, thereby, through the connection of all the individual wiring, such as signal wires and/or power source wire, an electrically connected base is thus obtained. 
     In application, the conventional plug has drawbacks. The plug is manufactured in accordance with the standard plug, and due to the frequent plug-in and unplugged operation, the frequent friction between the insertion-pins with the insertion slots loosen the contacts of the two components. Thus, the plug cannot be smoothly mounted to a receptacle and more often, the contacts of the insertion-pins are poor. 
     Accordingly, it is a main object of the present invention to solve the above drawbacks by providing an improved structure of a cordless phone plug. 
     SUMMARY OF THE INVENTION 
     Accordingly, it is an object of the present invention to provide an improved structure of a cordless phone plug, wherein the plug structure has an enhanced rigid structure and will not be easily damaged, and the process of manufacturing and assembly thereof are thus simplified, and in turn, the cost of manufacturing is low 
     Yet another object of the present invention is to provide an improved structure of a cordless phone plug, wherein an insertion-pin positioning member having specific structure is mounted at a space formed between two rows of insertion-pins located at the rear end of the base seat. Thus, this will simplify the assembly operation and the insertion-pins are rigid and the insertion-pins will not be damaged easily, and the longevity of the plug is improved. 
     One aspect of the present invention is to provide an improved structure of a cordless phone plug, comprising an insulation housing, wiring, a base seat, an upper covering hood, and a lower covering hood, wherein an insertion-pin positioning member is mounted at a space formed between two rows of the insertion-pins located at the rear end of the base seat, and an U-shaped seat at the rear end of the positioning member is urged at a wiring positioning board and each of the insertion-pins is securely positioned, and at the same time the distance between the base seat and the wiring positioning board is constant, thus the rigidity of the structure of the entire plug is improved. 
     Yet another aspect of the present invention is to provide an improved structure of a cordless phone plug wherein the positioning member is mounted in between the base seat  22  and the wiring mounting plate without any locking operation or drilling a hole on the plug components, or injection of a glue process. Thus, as compared to the conventional method of assembly, the present claimed invention is simpler, and the cost of manufacturing is low. 
     Various other objects, advantages and features of the present invention will become readily apparent from the ensuing detailed description and the novel features which will be particularly pointed out in the appended claims. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 shows an application of the preferred embodiment of a cordless phone plug in accordance with the present invention. 
     FIG. 2 is a perspective view of a cordless phone plug of the present invention. 
     FIG. 3 is a perspective exploded view of a cordless phone plug of the present invention. 
     FIG. 4 is a sectional view of a cordless phone plug of the present invention, showing the structure of a positioning member. 
     FIG. 5 is a sectional view of a cordless phone plug of the present invention, showing the structure of various components. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to FIGS. 1 and 2, there is shown an improved structure of a cordless phone plug  20  which is used to insert into a standard insertion slot provided at the bottom section of a cordless hand phone  10  to form into an electrical communication for the connection with an external device as battery-charging, or hand free operation of phone. 
     As shown in FIGS. 2 and 3, the cordless phone plug  20  comprises wiring  21 , a base seat  22 , an upper covering hood  23 , a lower covering hood  24  and an insertion-pin positioning member  30 . All those components are enclosed within an insulation housing  25 , and the front end of the base seat  22  is extended out from the open end of the housing  25 , and forms into a connection end of the plug  20 . 
     FIG. 3 shows the cordless phone plug  20  in accordance with the present invention. As shown in FIG. 3, the wiring  21  are referred to a power source wire, a signal wire and cables. In the figure, the wiring  21  of the present inventions are shown as power source wiring. 
     As the wiring  21  are provided on a wiring positioning board  26 , and the positioning board  26  urges the interior of the insulation housing  25  so as to position the wiring  21 . The end terminal of the wiring  21  is provided with a single wire to connect to an anti-surge coil  27  to prevent instantaneous high voltage. Together with the two electrodes of the wiring, they form into a plurality of connection points, which can be soldered to the insertion-pins  28  of the base seat  22  to form an electrical communication. 
     The base seat  22  includes a plurality of insertion-pins, which are arranged into two horizontal rows. Each of the insertion-pins can be soldered to the signal connection point or power source connection point of the wiring  21  for connection to the external device. 
     The upper covering hood  23  is provided with a spring fastener  28  at the front end thereof, and together with the lower covering hood  24 , they are enclosed by the base seat  22 , forming into a base seat  22  with an outer metallic covering hood. 
     As shown in FIGS. 3,  4  and  5 , the insertion-pins positioning member  30  is formed as one unit and includes a transverse direction positioning seat  31  at the front end thereof, an U-shaped seat  32  integrally connected from the rear end of the transverse direction positioning seat  31 , and the U-shaped opening facing backward, which is corresponding to the wiring positioning board  26 . 
     In assembly the insertion-pin positioning member  30 , the positioning seat  31  at the front end of the positioning member  30  is directly mounted at a space formed between the two rows of insertion-pins  28  at the base seat  22 . As shown in FIG. 4, the U-shaped seat  32  at the rear end of the positioning member  30  can exactly urge against the wiring positioning board  26  within the housing  25  to form into a secured positioning structure, which is shown in FIG.  5 . 
     Due to the fact that the insertion-pin positioning member  30  located in between the base seat  22  and the wiring positioning board  26 , and the transverse positioning seat  31  at the front end of the positioning member  30  being exactly located at the space between the two rows of the insertion-pins  28  at the rear end of the base  22 , every insertion-pin  28  is urged by the positioning seat  31  and is formed into a secured positioning structure. Therefore, even the plug is often unplugged; the insertion-pins  28  will not be dislocated. 
     In additional, the U-shaped seat  32  at the rear end of the positioning member  30  urges the wiring positioning board  26  such that the base  22  is securely mounted within the insulation housing  25 , and at the same time the U-shaped space of the U-shaped seat  32  can accommodate any other the additional parts and other supplementary parts of the end terminal of the wiring  21 , for instance, the anti-surge coil  27  is protected within the U-shaped space. 
     As compared with the conventional cordless phone plug, the present claimed invention allows the individual components within the insulation housing  25  to be securely positioned by means of the positioning member  30  and upgrades the rigid structure of the plug. In additional, the transverse positioning seat  31  at the front end of the positioning member  30  allows the insertion-pins  28  not to be dislocated by means of the urging of the positioning seat  31 . Further, in assembling this positioning member  30 , the positioning member  30  is mounted in between the base seat  22  and the wiring positioning plate  26  without any locking operation or drilling a hole on the plug components, or injection of a glue process. Thus, as compared to the conventional method of assembly, the present claimed invention is easy and quick, and the cost of manufacturing is low. 
     While the invention has been described with respect to preferred embodiment, it will be clear to those skilled in the art that modifications and improvements may be made to the invention without departing from the spirit and scope of the invention. Therefore, the invention is not to be limited by the specific illustrative embodiment, but only by the scope of the appended claims.