Abstract:
A terminal for assembling wires of different diameters, such as UBS or 1394 terminals. The terminal includes a base with piercing conductive pieces installed in the base. A buckling press is attached to the base and presses metal wires positioned so that conductive wires of different diameters in a predetermined range can be connected effectively.

Description:
BACKGROUND OF THE INVENTION 
     Computer, electronic devices and other related devices are developed continuously. Therefore, the data or instruction transmissions between different components are performed by wires so that connecting terminals are more and more important. To transfer data correctly, each pin of a terminal must be completely connected to each conductive metal wires of a cable. Therefore, how to connect pins of a terminal to metal wires of a cable rapidly and effectively has become a critical point in manufacturing terminals. 
     Since the function of the transmitting wire connected to a terminal is varied, the prior art that a terminal is connected to a plurality of wires with the same diameter is changed. Currently, a terminal is necessary to be connected with a plurality of wires with different diameters by pins, such as universal serial buses. In general, in that system, a terminal is connected to four wires (afterward, it will be developed to be connected to six or eight wires). Two wires are coarse, and the other two are slender. The two coarse wires are power wires (wire of electric number  24  to number  28  according to the current. The larger the number, the thinner the diameter). The wire for signal transmission is slender (wire of electric number  28  to  30 ). Therefore, the terminal of the wires must be connected to wires of different diameters. However, in order to have a preferred quality of connection, in the manufacturing of the terminal, different parts must be prepared, such as metal pins, and fixing press plates. The manufacturing process is thus prolonged. The parts can not be standardized so that the compatibility is low. 
     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. 
     SUMMARY OF THE INVENTION 
     Accordingly, the primary object of the present invention is to provide a terminal for assembling wires of different diameters, wherein a terminal can be assembled with conductive wires of different diameters, such as UBS or 1394 terminals. A base is placed in a terminal, and a piercing conductive piece can be installed in the base. A buckling press is used to be pressed as metal wires are positioned so that conductive wires of different diameters in a predetermined range can be connected effectively. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is an exploded perspective view of the components of the present invention. 
     FIG. 2A is a bottom view of the piercing conductive pieces of the present invention. 
     FIG. 2B is a side view of one of the piercing conductive pieces of FIG.  2 A. 
     FIG. 2C is a cross-sectional view taken along line I—I of FIG.  2 B. 
     FIG. 2D is a cross-sectional view taken along line II—II of FIG.  2 B. 
     FIG. 3A is a bottom view of the base according to the present invention. 
     FIG. 3B is a cross-sectional view taken along line III—III of FIG.  3 A. 
     FIG. 3C is a cross-sectional view taken along line IV—IV of FIG.  3 A. 
     FIG. 3D is a cross-sectional view taken along line V—V of FIG.  3 A. 
     FIG. 4A is a top view of the base assembly of the present invention. 
     FIG. 4B is an end view of the base assembly of FIG.  4 A. 
     FIG. 5 is an exploded side view showing the base of the terminal having been placed with a piercing conductive piece and a buckling press pressed thereinto. 
     FIG. 6A is a bottom view of the buckling press of the present invention. 
     FIG. 6B is an end view of the buckling press of FIG.  6 A. 
     FIG. 6C is a cross-sectional view taken along line VI—VI of FIG.  6 A. 
     FIG. 7 is an exploded cross sectional view showing the base of the terminal having been placed with a piercing conductive piece and a buckling press pressed thereinto. 
     FIG. 8 is an exploded side view of the terminal of the present invention being coupled with a lead wire. 
     FIG. 9 is an assembled view of the terminal of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to FIGS. 1,  3  and  4 , the present invention is suitable for terminals for assembling wires of different diameters. The present invention includes a base  1 , piercing conductive piece  2 , and a buckling press  3 , etc. The base  1  has basically a rectangular shape. A front end thereof has an extending tongue  11 . The lower side of the extending tongue  11  has an opened section  12 , and the rear side thereof has a press section  13 . The two sides of the press section  13  are installed with buckling groove  14 . A recess is installed in the plane thereof. The distal end of the recess  15  is a stop  16 . The recess  15  extends to the extending tongue  11  and then is formed with a penetrating positioning groove  17 . 
     Referring to FIG. 2, the piercing conductive piece  2  of the present invention has a shape approximately matching to the recess  15  of the base  1  and the penetrating positioning groove  17 , while the front section thereof has a stop block  21  and the rear section thereof has a large piercing rod  22  and a small piercing rod  23 . The center of the large piercing rod  22  has a larger slot suitable to be penetrated and then connected to a metal wire with a larger diameter, while the small piercing rod has an opposite effect. 
     Referring to FIGS. 4 and 5, the front end of the piercing conductive piece  2  passes into the penetrating positioning groove  17  and then is buckled by the stop block  21  so that the front end of the piercing conductive piece  2  exposes out of the opening section  12  below the extending tongue  11  of the base  1  (for contacting and conduction as assembling with the male side). Moreover, the rear section thereof is placed into the recess  15 . Thereby, the piercing conductive piece  2  is combined to the base  1 . 
     With reference to FIGS. 5,  6 , and  7 , the buckling press  3  of the present invention has a shape similar to the press section  13  at the rear side of the base  1 . Two sides thereof are installed with hooks  31  symmetrically to the buckling groove  14 . The lower side of the buckling press  3  is installed with a plurality of large wire grooves  32  and a plurality of small wire grooves  33  which are equal in numbers and symmetrical to the recess  15  and piercing conductive piece  2 . The middle section of the large wire groove  32  has small wire slot  321 . The buckling press  3  is installed with through holes  34  with respect to the large piercing rod  22  and small piercing rod  23 . 
     Referring to FIGS. 5,  7  and  8 , in assembly, the metal conductive wires  4  and  5  of different diameters are placed in the large wire groove  32  and small wire groove  33  of the buckling press  3  (in general, the large metal conductive wire  4  is placed at outer side, and the slender one  5  is placed at the middle section). The larger metal conductive wire does not pass through the small piercing rod  23 , but is stopped in front of the small piercing rod  23 ). After the wire is pressed into the base  1  so that the piercing rods  22  and  23  pierces through each metal conductive wires so as to conduct. Then, it is buckled and positioned by the buckling groove  14  and hook  31 . Then, an inner casing  6  covers thereon. 
     Aforesaid terminal structure of the present invention can be assembled with slender metal conductive wires  5 , while the two wires at the outer side are penetrated by the smaller piercing rod  23 . If it is assembled with larger wires  4 , it is only necessary to replace the buckling press  3 . Thereby, the terminal structure of the present invention may be assembly by only slender wires, or only larger wires, or the mixing of the two. 
     Referring to FIG. 1, after assembling the terminal, in general, a front edge thereof is inserted into a frame  7  and then outer side of the inner casing  6  is screwedly fixed or is molded. These are well known in the prior art, and thus the detail will not be described herein. 
     The present invention are thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.