Patent Publication Number: US-6668423-B1

Title: Control device of a luggage pull rod

Description:
RELATED U.S. APPLICATIONS 
     Not applicable. 
     STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
     Not applicable. 
     REFERENCE TO MICROFICHE APPENDIX 
     Not applicable. 
     FIELD OF THE INVENTION 
     The present invention relates generally to luggage, and more particularly to a pull rod control device of the luggage. 
     BACKGROUND OF THE INVENTION 
     The conventional luggage pull rod control device is generally formed of an elastic locating block and a receiving hole. The elastic locating block is located at one end of the expandable pull rod while the receiving hole is located at an appropriate position of the shank of the pull rod. In light of the mechanical friction between the wall of the receiving hole and the locating block, both the receiving hole and the locating block are worn out easily. As a result, the locating effect of the expandable pull rod is seriously undermined. 
     BRIEF SUMMARY OF THE INVENTION 
     The primary objective of the present invention is to provide a luggage pull rod control device comprising a locating member to locate effectively the expandable pull rod. 
     The features and the advantages of the present invention will be readily understood upon a thoughtful deliberation of the following detailed description of the present invention with reference to the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
     FIG. 1 shows an exploded view of the present invention. 
     FIGS. 2-7 are sectional schematic views of the present invention in action. 
     FIG. 8 shows a reference view of the present invention in use. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     As shown in all drawings provided herewith, a luggage pull rod control device of the present invention comprises a locating member  10  which is located in the interiors of a drive rod  20  and extension rods  21 ,  22 , and  23 . The drive rod  20 , the extension rods  21 ,  22  and  23 , and a fixation rod  24  form together an expandable pull rod which is applicable to a variety of luggages. 
     The locating member  10  comprises a main body  11 , a locating body  12 , and a driven member  13 . 
     The main body  11  is provided in the interior with a receiving space, and in the side with an assembly hole  111 , so as to join with the extension rods  21 ,  22 ,  23 . The main body  11  is provided at the bottom with a press face  112 . 
     The locating body is disposed in the assembly hole  111  of the main body  11  in conjunction with an elastic element  14  and is provided with a moving portion  121  and a locating portion  122  which is jutted out of the main body  11  to be corresponding with the through holes  211 ,  212 ,  213  of the extension rod  21 , the through holes  221 ,  222 ,  223  of the extension rod  22 , and the through holes  231 ,  232 , of the extension rod  23 , and the through holes  241  and  242  of the fixation rod  24 . 
     The driven member  13  is of a rod-shaped construction and is provided at one end with a bearing end  131 . The driven member  13  is provided in the shank with a guide portion  132 , and at other end with a position confining portion  133  which is disposed in the main body  11  in conjunction with the elastic element  14 . The guide portion  132  is cooperative with the moving portion  121  of the locating member  12 . 
     By virtue of the displacement of the guide portion  132  of the driven member  13 , the locating member  10  enables each rod member of the expandable pull rod to be located or adjusted. 
     The main body  11  is provided in the press face  112  with an elastic element  14  and a position confining member  15 . 
     The drive rod  20 , the extension rods  21 ,  22 ,  23 , and the fixation rod  24  are different in diameter from one another. 
     In operation, the locating portion  201  is caused by the drive rod  20  to move away from the through hole  211 , as shown in FIG. 2, thereby enabling the drive rod  20  to press downward the locating member  10  which is located at the end of the extension rod  21 , as shown in FIG.  3 . As a result, bearing portion  131  of the driven member  13  is forced to link the guide portion  132  and the moving portion  121  of the locating member  12 , thereby resulting in the withdrawal of the locating portion  122  from the through hole  221 . The extension rod  21  and the drive rod  20  continue to press the locating member  10  which is located at the end of the extension rod  22 . The process is repeated such that the extension rods  21 ,  22 ,  23  are received in the fixation rod  24 , as shown in FIGS. 5-7. 
     The present invention described above is to be regarded in all respects as being illustrative and nonrestrictive. Accordingly, the present invention may be embodied in other specific forms without deviating from the spirit thereof. The present invention is therefore to be limited only by the scopes of the following claims.