Patent Publication Number: US-6902436-B2

Title: Car lighter plug of quick disassembly

Description:
FIELD OF THE INVENTION 
   The present invention relates to a car lighter plug of quick disassembly and, more particularly, to a car lighter plug capable of being inserted into a car lighter insertion hole to transmit electricity to a lighter, a charger, or an electronic device connected to the car lighter plug. The car lighter plug of quick disassembly of the present invention can be firmly fixed after angle adjustment is finished. 
   BACKGROUND OF THE INVENTION 
   A conventional car lighter plug has an insertion portion, which has an elastic conducting post disposed at the front end thereof. Projective elastic conducting sheets are disposed at the side face of the insertion portion. The insertion portion can be inserted into a car lighter insertion hole to let the elastic conducting post and the elastic conducting sheets of the insertion portion achieve electric connection with corresponding conducting terminals in the car lighter insertion hole so that electricity can be transferred to the car lighter plug. The car lighter plug can also be connected to a lighter, a charger, or an electronic device so that electricity can be transferred to the lighter, the charger, or the electronic device. 
   Besides, there is also a kind of car lighter plug with an angle-adjustable joint structure thereon. A user can adjust various kinds of a car lighter, a charger, or an electronic device according to practical necessity to facilitate use. 
   However, the joint structure of the conventional car lighter plug utilizes a ratchet wheel or a friction face to fix the already adjusted angle. After a period time of use, the situation of slide may arise due to factors like abrasion so that the already adjusted angle cannot be firmly fixed. 
   Accordingly, the above conventional car lighter plug has inconvenience and drawbacks in practical use. The present invention aims to resolve the problems in the prior art. 
   SUMMARY OF THE INVENTION 
   The primary object of the present invention is to provide a car lighter plug of quick disassembly, whereby a first body and a second body thereof cannot make relative motion after angle adjustment is finished, thereby ensuring that the first body and the second body can be firmly fixed so as to have skidproof effect after angle adjustment is finished. 
   To achieve the above object, the present invention provides a car lighter plug of quick disassembly, which comprises a first body, a second body, a pivot, and a first quick-disassembly twist button. The first body has an elastic conducting post and a plurality of projective elastic conducting sheets. The rear end of the first body has a through hole. A plurality of elastic sheet portions, each having a positioning body, are formed in the through hole. The periphery of the elastic sheet portions has a vacant space. The front end of the second body has a second pivotal seat. The pivot has a pivotal portion, a ring of positioning teeth, and a stop ring. The pivotal portion of the pivot passes through the through hole of the first body and the second pivotal seat of the second body. One end of the first quick-disassembly twist button has a cam portion. The first quick-disassembly twist button is pivotally connected at one end of the pivot. The cam portion abuts against the first body. The positioning teeth engage the positioning bodies. The first quick-disassembly twist button can jointly drive the pivot to make axial displacement so that the stop ring can selectively enter into or recede from the vacant space. 
   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, in which: 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective view of the present invention; 
       FIG. 2  is another perspective view of the present invention; 
       FIG. 3  is an exploded perspective view of the present invention; 
       FIG. 4  is another exploded perspective view of the present invention; 
       FIG. 5  is a cross-sectional view of the adjustment state of the present invention; and 
       FIG. 6  is a cross-sectional view of the fixed state of the present invention. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   As shown in  FIGS. 1  to  4 , the present invention provides a car lighter plug of quick disassembly, which comprises a first body  10 , a second body  20 , a pivot  30 , and a first quick-disassembly twist button  40 . The first body  10  has a cylindrical insertion portion  11 , whose outer diameter is equal to the inner diameter of a car lighter insertion hole (not shown). The front end of the insertion portion  11  has an elastic conducting post  12 . A plurality of projective elastic conducting sheets  13  are formed on the side face of the insertion portion  11 . The elastic conducting post  12  and the elastic conducting sheets  13  are electrically connected to a car lighter, a charger, or an electronic device to be connected with the car lighter plug via conducting wires (not shown). The insertion portion  11  can be inserted into the car lighter insertion hole. The elastic conducting post  12  and the elastic conducting sheets  13  of the insertion portion  11  achieve electric connection with corresponding conducting terminals in the car lighter insertion hole so that electricity can be transferred to the car lighter plug. 
   The rear end of the first body  10  has a first pivotal seat  14 , which has a groove  15  at the center thereof. The first pivotal seat  14  has a transversal through hole  16 , which vertical intersects the groove  15 . The through hole  16  has a plurality of elastic sheet portions  17  therein. Each of the elastic sheet portions  17  has a positioning body  18 . The periphery of the elastic sheet portions  17  forms a vacant space  19  so that the elastic sheet portions  17  can make outward swing. 
   The front end of the second body  20  has a second pivotal seat  21 , which is a flat body corresponding to the groove  15 . The second pivotal seat  21  can be inserted into the groove  15 . The second pivotal seat  21  has a noncircular transversal fixing hole  22  corresponding to the through hole  16 . The other end of the second body  20  can be connected to a car lighter, a charger, or an electronic device according to necessity. 
   The pivot  30  has a pivotal portion  31 , which is a noncircular body corresponding to the fixing hole  22  of the second body  20 . One end of the pivotal portion  31  has a head portion  33  having a larger outer diameter. The outer edge of the head portion  32  has a stop ring  33  corresponding to the vacant space  19  of the first body  10 . The pivot  30  has also a ring of positioning teeth  34  between the pivotal portion  31  and the head portion  32 . The other end of the pivotal portion has two connection holes  35 . 
   The pivotal portion  31  of the pivot  30  passes through the through hole of the first body  10  and the fixing hole  22  of the second body  20 . The pivotal portion  31  and the fixing hole  22  are connected in such a way that they cannot make relative rotation. The pivot  30  and the second body  20  thus cannot make relative rotation. Because the inner diameter of the through hole  16  is larger than the outer diameter of the pivotal portion  31 , the pivotal portion  31  and the through hole  16  are connected in such a way that they can make relative rotation. The pivot  30  and the first body  10  thus can make relative rotation. Therefore, the first body  10  and the second body  20  can make relative rotation with the pivot  30  as the axis. 
   One end of the first quick-disassembly twist button  40  has a cam portion  41  and a recessed portion  42 . Each side of the recessed portion  42  has a connection shaft  43 . The two connection shafts  43  are pivotally matched with the two connection holes  35  of the pivot  30  so that the first quick-disassembly twist button  40  can be pivotally connected with the pivot  30 . The cam portion  41  of the first quick-disassembly twist button  40  can abut against the outside of the first pivotal seat  14  of the first body  10 . The positioning teeth  34  of the pivot  30  can engage the positioning bodies  18  on the elastic sheet portions  17 . When the first body  10  and the second body  20  make relative rotation, multi-stage positioning effect can be accomplished. 
   The first quick-disassembly twist button  40  can be wrenched to jointly drive the pivot  30  to make axial displacement through cam action of the cam portion  41 . The stop ring  33  of the pivot  30  can thus selectively enter into the vacant space  19  of the first body  10  or recede from the vacant space  19 . The car lighter plug of quick disassembly of the present invention is thus formed. 
   The first body  10  and the second body  20  are pivotally connected together through the pivot  30  to form an angle-adjustable joint structure. A user can adjust different angles of a car lighter, a charger, or an electronic device tp facilitate use according to practical necessity. 
   When the user wants to adjust the angle, he needs to first wrench the quick-disassembly twist button  40  so as to jointly drive the pivot  30  to make axial displacement through cam action of the cam portion  41 . The stop ring  33  of the pivot  30  can thus recede from the vacant space  19 , as shown in FIG.  5 . The elastic sheet portions  17  can thus make outward swing and have elasticity so that the positioning teeth  34  of the pivot  30  and the positioning bodies  18  on the elastic sheet portions  17  can make relative motion. The first body  10  and the second body  20  can thus make relative rotation. Moreover, multi-stage positioning effect and sound can be generated through the action of the positioning teeth  34  and the positioning bodies  18 . 
   After angle adjustment is finished, the user needs to wrench the first quick-disassembly twist button  40  in the reverse direction so as to jointly drive the pivot  30  to make axial displacement in the reverse direction through cam action of the cam portion  41 . The stop ring  33  of the pivot  30  can thus enter into the vacant space  19 , as shown in FIG.  6 . The stop ring  33  of the pivot  30  can thus recede from the vacant space  19 , as shown in FIG.  5 . The elastic sheet portions  17  thus cannot make outward swing and have no elasticity so that the positioning teeth  34  of the pivot  30  and the positioning bodies  18  on the elastic sheet portions  17  cannot make relative motion. The first body  10  and the second body  20  thus cannot make relative rotation. Therefore, the first body  10  and the second body  20  can be firmly fixed after angle adjustment is finished to have skidproof effect. 
   Besides, the rear end of the second body  20  can also have a third pivotal seat  23 , whose structure is the same as that of the first pivotal seat  14  of the first body  10 . The third pivotal seat  23  of the second body  20  is also connected with a second pivot  30 ′ and a second quick-disassembly twist button  40 ′, which can be used to connect the car lighter, the charger, or the electronic device to form a dual-pivot car lighter plug, whose angle can be more flexible adjusted. The two pivots  30  and  30 ′ are arranged in different directions, i.e., the pivot  30  is vertically arranged, while the pivot  30 ′ is horizontally arranged. 
   Although the present invention has been described with reference to the preferred embodiment thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have been suggested in the foregoing description, and other 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.