Patent Publication Number: US-7909623-B2

Title: Wedge of a cable connector grounding device

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This invention relates to a wedge of a cable connector grounding device. 
     2. Description of the Prior Art 
     With reference to  FIG. 1 , a 3D view of a conventional cable central connector, the cable connector mainly comprises a body  1 . One side of the body  1  is formed with a spirally conjunct seat  2  inside which a concave tapped hole  3  is formed. Then, on the circumferential wall of spirally conjunct seat  2 , two concave slots  4  opposite to each other are formed axially for a lead wire  6  of a grounding wire  5  to pass into. Further, an arc-shaped slot  7  conjunct to the slots  4  is formed at the bottom of tapped hole  3 . Next, a packing seat  8  is spirally conjunct to the tapped hole  3 , and a concave arc-shaped slot  9  is further formed at the bottom of packing seat  8 . 
     With reference to  FIG. 2 , a schematic view illustrating the service of conventional cable central connector, although the conventional cable connector can be wedged to the lead wire  6  of grounding wire  5 , the diameter of lead wire  6  is smaller than that of each of the arc-shaped slots  7  and  9 , only points A and B of the lead wire  6  contact the arc-shaped slots  7  and  9 , poor contact being thereby caused. Then, the arc-shaped slot  7  is a groove of which the surface is flat and smooth, so the resistance resulting from the lead wire  6  relatively decreases. Further, when being subject to a force and pulled and dragged, the lead wire  6  glides along the arc-shaped slot  7 , there being thereby the possibility of poor tightness and clearance. Apparently, the effect of grounding is not achieved. Thus, improvement of the conventional cable central connector is necessarily made. 
     Consequently, because of the technical defects of described above, the applicant keeps on carving unflaggingly through wholehearted experience and research to develop the present invention, which can effectively improve the defects described above. 
     SUMMARY OF THE INVENTION 
     A wedge of a cable connector grounding device according to this invention comprises a body. One side of the body is formed with a spirally conjunct seat inside which a concave spirally conjunct slot is formed. Then, on the circumferential wall of spirally conjunct seat, two concave slots opposite to each other are formed. Further, at the bottom of spirally conjunct slot, a position limiting groove is formed from the concave slots towards the center. Next, at the bottom of spirally conjunct slot, a concave camber is formed along the circumferential wall toward the center. A wedge crest line is defined at a section of connection between the concave camber and the position limiting groove. A packing unit is further provided is spirally connected to the spirally conjunct slot. 
     Thus, the packing unit can be used to tighten the lead wire passing through the position limiting groove for achievement of the longitudinal position limiting. The wedge crest lines are used to wedge the lead wire transversally and further tighten the lead wire. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a 3D view of a conventional cable central connector; 
         FIG. 2  is a schematic view illustrating the service of conventional cable central connector; 
         FIG. 3  is a partially exploded 3D view of a cable connector according to this invention; 
         FIG. 4  is a top view of a spirally conjunct seat according to this invention; 
         FIG. 5  is a sectional view of the spirally conjunct seat according to this invention; 
         FIG. 6  is a schematic view illustrating a first service state of this invention clipping a big lead wire; 
         FIG. 7  is a schematic view illustrating a second service state of this invention clipping a big lead wire; 
         FIG. 8  is a schematic view illustrating a first service state of this invention clipping a small lead wire; and 
         FIG. 9  is a schematic view illustrating a second service state of this invention clipping a small lead wire. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Now, the present invention will be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of preferred embodiments of this invention are presented herein for purpose of illustration and description only; it is not intended to be exhaustive or to be limited to the precise form disclosed. 
     With reference to  FIGS. 3 and 4  shown respectively as a partially exploded 3D view of a cable connector according to this invention and as a top view of a spirally conjunct seat, this invention mainly comprises a body  10  and a packing unit  20 . 
     The body  10  is provided with two male joints  11  connected to each other, and the male joints  11  can be spirally conjunct to female joints  110  of two cables  100 . One side of the body  10  is formed with a spirally conjunct seat  12 . A concave spirally conjunct slot  121  is formed in the spirally conjunct seat  12  and a circumferential wall  122  is defined around the circumference of spirally conjunct slot  121 . The circumferential wall  122  is lengthways formed with two concave slots  123  opposite to each other are formed into which a lead wire  210  of a grounding wire  200  passes. Further, the bottom of spirally conjunct slot  121  is formed with a concave position limiting groove  124  toward the center of each of the slots  121 , and the position limiting groove  124  is generally a V-formed groove and brings to an end from the circumference of each of the slots  123  toward the center of spirally conjunct seat  12 . Next, at the bottom of spirally conjunct slot  121 , a concave camber  125  is formed along the circumferential wall  122 . Each of the concave cambers  125  is generally in the form of a conic surface and is depressed by degree from the edge of inner side of the circumferential wall  122  toward the center of spirally conjunct seat  12 . A wedge crest line  126  is defined at a section of connection between the concave camber  125  and the position limiting groove  124 . Each of the wedge crest lines  126  brings to an end from the inner side of circumferential wall  122 , slanting toward the center of spirally conjunct seat  12 . Besides, the center of bottom of the spirally conjunct slot  121  is formed with a concave container chamber  127 . 
     With reference to  FIG. 5 , the packing unit  20  comprises a locking screw nut  21  and a packing block  22  oppositely wedged into the locking screw nut  21 . The locking screw nut  21  can be spirally conjunct to the spirally conjunct slot  121  and the packing block  22  can be used to push down the lead wire  210 . The packing block  22  is formed with a concave slot  221  opposite to one side of the bottom of spirally conjunct slot  121 . The direction of concave slot  221  is identical to that of position limiting groove  124 . 
     With reference to  FIGS. 6 and 7  shown respectively as schematic views illustrating a first service state and a second service state of this invention clipping a big lead wire, when a clipping diameter is larger than that of lead wire  210 , the lead wire  210  must be made to pass through the position limiting groove  124  from the slots  123 . With the locking screw nut  21  spirally conjunct to the spirally conjunct slot  121 , the packing block  22  can be further driven downwards by locking screw nut  21  to push down the top of lead wire  210  and limit the lead wire  210  lengthways to the position between the concave slot  221  and the position limiting groove  124 . Further, the wedging crest lines  126  are used to generate a transversal wedging force applied to the lead wire  210  between the slots  123 , which thereby prevents the lead wire  210  from being loose. 
     With reference to  FIGS. 8 and 9  shown respectively as schematic views illustrating a first service state and a second service state of this invention clipping a small lead wire, when the clipping diameter is smaller than that of lead wire  210 , the packing block  22  is also used to limit the lead wire  210  lengthways to the position between the concave slot  221  and the position limiting groove  124  and the wedging crest lines  126  are used to generate the transversal wedging force applied to the lead wire  210 . Besides, when the lead wire  210  is repressed by the packing block  22 , the lead wire  210  is bent in a determined degree and sunken in the container chamber  127 , an transversal wedging force being thereby applied increasingly to the lead wire  210 . 
     While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention needs not be limited to the disclosed embodiment. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.