Patent Publication Number: US-6986680-B2

Title: Conductive wire insertion device for installing a lamp rod

Description:
This is the continuation in part of the U.S. patent Ser. No. 10/054,466 filed Jan. 24, 2002, now abandoned which is filed by the inventor of this application. The contents of U.S. patent Ser. No. 10/054,466 are thus incorporated into the present invention as a part of this specification. 

   BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to wire connection devices of lamps, and particularly to a conductive wire insertion device for installing a lamp rod. The user only inserts a lamp rod into the retaining seat of a wire connecting box without using any locking tool. Thus, the user can assemble the wire connecting box by himself or herself. 
   2. Description of Related Art 
   In the prior art, wire connection devices of lamps, such as wall lamps, stand type lamps, ceiling lamps, use studs and nuts to lock their components. In assembly, a user must use tools (such as spanners, openers, etc) to assembly the lamp, and it is often that the user is harmed. Moreover, in assembly, it is often that electric wires expose out and some dangerous events occur. Thereby, the prior art lamps are not suitable to be assembled by the user. In general, the manufacturer assembles lamp devices in advance, namely, wire boxes are assembled with inserting rods in the manufacturing process. However, a large space is required for transferring and storing wire connection devices and thus cost is increased. 
   SUMMARY OF THE INVENTION 
   Accordingly, the primary object of the present invention is to provide a conductive wire insertion device for installing a lamp rod. The conductive wire insertion device comprises a retaining seat and a locking seat. The retaining seat has a stepped through hole. A larger stepped hole of the through hole is exactly inserted by a female joint of a first electric wire. A male joint of a second electric wire is exactly positioned in a bottom stepped hole of the inserting hole. After the locking seat inserts into the retaining seat from a top end thereof, the male joint has an end portion which is exactly inserted into the female joint in the retaining seat; as a result, the first and second electric wire are conducted. 
   Another object of the present invention is to provide a conductive wire insertion device for installing a lamp rod, wherein the locking seat and the lamp rod are capable of being pulled out from the retaining seat for reducing the necessary storage space. Since the retaining seat is assembled to the wire connecting box, the user only inserts the locking seat into the retaining seat. Then, it can be used without using any locking tool; thus, the user may assemble it by himself or herself. 
   The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is an exploded perspective view of the present invention. 
       FIG. 1A  shows another embodiment of the present invention. 
       FIG. 1B  is a sectional view of the locking seat of  FIG. 1 . 
       FIG. 1C  is a sectional view of the inner threaded ring of  FIG. 1 . 
       FIG. 1D  is a sectional view of the retaining seat of  FIG. 1 . 
       FIG. 2  shows an assembled view of the present invention. 
       FIG. 3A  is a plane cross section view of the present invention before the lamp rod is inserted into a wire connecting box. 
       FIG. 3B  is a plane cross section view of the present invention after the lamp rod is inserted into the wire connecting box. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   Referring to  FIGS. 1 ,  1 A and  2 , the conductive wire insertion device for installing a lamp rod of the present invention is illustrated. The conductive wire insertion device includes a retaining seat  1  installed in a bottom plate D 1  of a wire connecting box (not shown), and a locking seat  2  inserted in a retaining seat  1 . 
   With reference to  FIG. 1  and  FIG. 1A , wherein  FIG. 1A  is another embodiment of the present invention, which shows another structure of the retaining seat  1  and the locking seat  2 . In the following description, the structure of  FIG. 1  is described, while the structure of  FIG. 1A  is indicated in parentheses. The retaining seat  1  has a stepped through hole  11 . Thereby, the locking seat  2  is exactly inserted into a smaller stepped hole  11 A of the through hole  11  and then positioned therein. The larger stepped hole  11 B of the through hole  11  is exactly inserted by a female joint  31  of an electric wire  3 . An outer side of the retaining seat  1  is protruded with a flange  12  for resisting against the bottom plate D 1 . Two sides of the flange  12  are a front threaded section  13  and a rear threaded section  14 . Thereby, after the retaining seat  1  is inserted into a via hole D 2  of the bottom plate D from a top end of the wire connecting box. The bottom plate D 1  of the wire connecting box is locked with a female screw Q. Thereby, the retaining seat  1  is positioned to the wire connecting box. A top edge of the retaining seat  1  ( 1 ′) is protruded with two protrusions  15  (or grooves  15 ′ in  FIG. 1A ) for preventing the locking seat  2  from rotation. Furthermore, the rear threaded section  14  of the retaining seat  1  is locked to an inner threaded ring P 1 . The electric wire  3  passes through the inner threaded ring P 1 . A lower end of the inner threaded ring P 1  exactly supports the female joint  31  of the electric wire  3  for preventing the electric wire  3  from falling down. 
   An interior of the locking seat  2  has a two-staged stepped inserting hole  21 . Thereby, an electric wire  4  is exactly inserted from a lower end of the locking seat  2  and then the male joint  41  of the electric wire  4  is exactly positioned in a bottom stepped hole  21 B of the inserting hole  21 . An end portion of the male joint slightly protrudes from a bottom end  22  of the locking seat  2 . After the locking seat  2  inserts into the retaining seat  1  from a top end thereof. The male joint  41  has an end portion which is exactly inserted into the female joint  31  in the retaining seat  1 . As a result, the wire is conducted. The parts of the annular surface of the locking seat  2  ( 2 ′) engaged with the protrusions  15  (or grooves  15 ′ in  FIG. 1A ) of the retaining seat  1  are formed with grooves  23  (or blocks  23 ′ in  FIG. 1A ) for preventing the locking seat  2  ( 2 ′) from rotation. After the locking seat  2  is inserted into the retaining seat  1 , an inner threaded ring P 2  is placed around the upper part of the locking seat  2 . The inner threaded ring P 2  is exactly locked to the front threaded section  13  of the retaining seat  1 . Thereby, the locking seat  2  is positioned to the retaining seat  1 . 
   Moreover, in the top stepped hole  21 A of the locking seat  2 , a hollow lamp rod  24  is welded therein. The lamp rod  24  can be passed through by the electric wire  4 . 
   The assembly of the present invention will be described hereinafter. Referring to  FIG. 3 , after the electric wire  3  is inserted into the retaining seat  1 , it is locked to the bottom plate D 1  by screwing the female screw Q with the rear threaded section  14  so that the female joint  31  of the electric wire  3  exactly protrudes from the larger stepped hole  11 B of the retaining seat  1 . The electric wire  4  is inserted into the locking seat  2  from a lower end thereof in advance. The male joint  41  of the electric wire  4  protrudes out of the bottom end of the locking seat  2 . Thereby, when the locking seat  2  is inserted into the retaining seat  1  and locked therein by using the inner threaded ring P 1 . Then the top of the locking seat  2  is welded with the lamp rod  24 . Thereby, when the locking seat  2  is inserted into the retaining seat  1 , the lower end  22  of the locking seat  2  is exactly inserted into the smaller stepped hole  11 A of the retaining seat  1 , and the female joint  31  protruding from the lower end of the locking seat  2  is exactly engaged with the male joint  41  positioned in the larger stepped hole  11 B. Thereby, the retaining seat  1  and the locking seat  2  are conductive. Thereby, the inner threaded ring P 1  is tightly locked to the ear threaded section  14  so that the locking seat  2  is positioned above the retaining seat  1 . When it is desired to detach the locking seat  2  from the retaining seat  1 , it is only necessary to loose the inner threaded ring P 1 , and then the locking seat  2  is detached from the retaining seat  1 . 
   Thereby, when it is desired to package, transfer, or store the lamp seat, the locking seat  2  and the lamp rod  24  can be pulled out from the retaining seat  1  so that the locking seat  2  and the lamp rod  24  are disposed separately and thus the space for placing the two is reduced. Moreover, since the retaining seat  1  is assembled to the wire connecting box, the user only inserts the locking seat  2  into the retaining seat  1 . Then, it can be used without using any locking tool. Thus, the user may assemble it by himself or herself. 
   Although the present invention has been described with reference to the preferred embodiments, it will be understood that the invention is not limited to the details described thereof. Various substitutions and modifications have been suggested in the foregoing description, and others will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.