Patent Publication Number: US-6982373-B1

Title: Musical instrument stand

Description:
FIELD OF THE INVENTION 
   The present invention relates to a musical instrument stand, and more particularly to a musical instrument stand which holds a musical instrument stably. 
   BACKGROUND OF THE INVENTION 
   Referring to  FIGS. 1 and 2 , a conventional musical instrument stand has a tripod device  11 , a main shaft  12  disposed on the tripod device  11 , a brace device  13  disposed on the main shaft  12 , and two brackets  113 . The tripod device  11  has a main leg  111  and two auxiliary legs  112 . Each of the brackets  113  is connected to the corresponding auxiliary let  112 . The main shaft  12  has a L shape. The brace device  13  has a U-shaped bracer  131  having two arms  134 , an end rod  133  disposed on one of the arms  134 , and a locking bar  132 . The locking bar  132  has an end groove  136 , and an end hole  135  to receive the end rod  133 . One end of the U-shaped bracer  131  has the end rod  133  engaging with the end hole  135 , and the other end of the U-shaped bracer  131  engages with the end groove  136 . The locking bar  132  is rotated along a direction A. Then a guitar  14  is placed on the conventional musical instrument stand. The brackets  113  and the brace device  13  support the guitar  14 . Since the U-shaped bracer  131  is made of a plastics material, the end hole  135  of the locking bar  132  will be enlarged after a long period of usage. Therefore, the end rod  135  will be disengaged from the end hole  135  of the locking bar  132  easily. 
   SUMMARY OF THE INVENTION 
   An object of the present invention is to provide a musical instrument stand which holds a musical instrument stably. 
   Accordingly, a musical instrument stand comprises a tripod device, a main shaft disposed on the tripod device, a holder device disposed on the main shaft, at least a retainer device, and at least a bracket device. The retainer device is disposed on the main shaft. The bracket device engages with the retainer device. The tripod device has a joint, and three legs connected to the joint. The main shaft has a first tube engaging with the joint, and a second tube inserted through the first tube. The holder device has a main seat, a connector connected to the main seat, a fixed fastening device, a movable fastening device, and the connector engaging with the main shaft. The main seat has a generally U-shaped pad, an aperture engaging with the fixed fastening device, and a socket portion engaging with the movable fastening device. 
   In accordance with a preferred embodiment of the present invention, a musical instrument stand comprises a tripod device, a main shaft disposed on the tripod device, a holder device disposed on the main shaft, at least a retainer device, and at least a bracket device. The retainer device is disposed on the main shaft. The bracket device engages with the retainer device. The tripod device has a joint, and three legs connected to the joint. The main shaft has a first tube engaging with the joint, and a second tube inserted through the first tube. The holder device has a main seat, a connector connected to the main seat, a fixed fastening device, a movable fastening device, and the connector engaging with the main shaft. The main seat has a generally U-shaped pad, an aperture engaging with the fixed fastening device, and a socket portion engaging with the movable fastening device. The fixed fastening device has a rod, a first hose, and a cap plug. The rod is inserted through the aperture of the main seat. The first hose encloses the rod. The cap plug engages with the rod. The movable fastening device has a locking bar, a second hose, and a pillar having an annular protrusion and an end protrusion. The pillar is inserted through the second hose and inserted in the socket portion of the main seat. The locking bar engages with the pillar. The locking bar has a fastening end having an end chamber to receive the fixed fastening device. The connector has a top wall, a peripheral wall, a through hole formed on the peripheral wall, an inner chamber communicating with the through hole, and a confining portion communicating with the inner chamber. A nut is inserted in the inner chamber to match the through hole of the connector. The nut is blocked by the confining portion of the connector. A threaded button is inserted through the through hole of the connector to be engaged with the nut. The socket portion of the main seat has a first end, a second end, a first chamber, a second chamber communicating with the first chamber, a periphery wall surrounding the first chamber and the second chamber, a confining groove to receive the end protrusion of the pillar, and a confining block disposed in the second chamber to block the end protrusion of the pillar. A diameter of the first chamber is smaller than a diameter of the second chamber. The retainer device has a pipe and a hollow plug engaging with the pipe. The pipe has a distal end, a proximal end, and a round hole. The hollow plug has a click portion and a confining recess. The bracket device has a generally U-shaped frame and a post having an end block to be inserted in the confining recess of the hollow plug. The post is inserted in the hollow plug. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective view of a conventional musical instrument stand of the prior art; 
       FIG. 2  is a perspective exploded view of a brace device stand of the prior art; 
       FIG. 3  is a perspective exploded view of a musical instrument stand of a first preferred embodiment in accordance with the present invention; 
       FIG. 4  is a perspective assembly view of a musical instrument stand of a first preferred embodiment in accordance with the present invention; 
       FIG. 5  is a sectional view taken along line  5 — 5  in  FIG. 4 ; 
       FIG. 6  is a sectional view taken along line  6 — 6  in  FIG. 4 ; 
       FIG. 7  is a sectional schematic view illustrating an engagement between a movable device and a socket portion of a holder device of a first preferred embodiment in accordance with the present invention; 
       FIG. 8  is a sectional schematic view illustrating a locking bar engaging with a cap plug and a confining groove engaging with a confining block of a first preferred embodiment in accordance with the present invention; 
       FIG. 9  is a partially sectional schematic view illustrating an engagement between a retainer device and a bracket device of a first preferred embodiment in accordance with the present invention; and 
       FIG. 10  is a perspective exploded view of a musical instrument stand of a second preferred embodiment in accordance with the present invention. 
   

   DETAILED DESCRIPTION OF THE INVENTION 
   Referring to  FIGS. 3 to 9 , a first musical instrument stand comprises a tripod device  2 , a main shaft  3  disposed on the tripod device  2 , a holder device  4  disposed on the main shaft  3 , at least a retainer device  5 , and at least a bracket device  6 . 
   The retainer device  5  is disposed on the main shaft  3 . 
   The bracket device  6  engages with the retainer device  5 . 
   The tripod device  2  has a joint  22 , and three legs  21  connected to the joint  22 . 
   The main shaft  3  has a first tube  31  engaging with the joint  22 , and a second tube  32  inserted through the first tube  31 . 
   The holder device  4  has a main seat  41 , a connector  42  connected to the main seat  41 , a fixed fastening device  45 , a movable fastening device  46 , and the connector  42  engaging with the main shaft  3 . 
   The main seat  41  has a generally U-shaped pad  47 , an aperture  43  engaging with the fixed fastening device  45 , and a socket portion  44  engaging with the movable fastening device  46 . 
   The fixed fastening device  45  has a rod  451 , a first hose  452 , and a cap plug  453 . 
   The rod  451  is inserted through the aperture  43  of the main seat  41 . 
   The first hose  452  encloses the rod  451 . 
   The cap plug  453  engages with the rod  451 . 
   The movable fastening device  46  has a locking bar  462 , a second hose  465 , and a pillar  461  having an annular protrusion  464  and an end protrusion  463 . 
   The pillar  461  is inserted through the second hose  465  and inserted in the socket portion  44  of the main seat  41 . 
   The locking bar  462  engages with the pillar  461 . 
   The locking bar  462  has a fastening end  466  having an end chamber  467  to receive the fixed fastening device  45 . 
   The connector  42  has a top wall  421 , a peripheral wall  422 , a through hole  423  formed on the peripheral wall  422 , an inner chamber  424  communicating with the through hole  423 , and a confining portion  425  communicating with the inner chamber  424 . 
   A nut  426  is inserted in the inner chamber  424  to match the through hole  423  of the connector  42 . The nut  426  is blocked by the confining portion  425  of the connector  42 . 
   A threaded button  7  is inserted through the through hole  423  of the connector  42  to be engaged with the nut  426 . 
   The socket portion  44  of the main seat  41  has a first end  441 , a second end  445 , a first chamber  444 , a second chamber  445  communicating with the first chamber  444 , a periphery wall  443  surrounding the first chamber  444  and the second chamber  445 , a confining groove  446  formed along a direction X 1  to receive the end protrusion  463  of the pillar  461 , and a confining block  447  disposed in the second chamber  445  to block the end protrusion  463  of the pillar  461 . 
   A diameter of the first chamber  444  is smaller than a diameter of the second chamber  445 . 
   The retainer device  5  has a pipe  53  and a hollow plug  55  engaging with the pipe  53 . 
   The pipe  53  has a distal end  51 , a proximal end  52 , and a round hole  54  formed along a direction X 2 . 
   The hollow plug  55  has a click portion  57  and a confining recess  56  formed along the direction X 2 . 
   The bracket device  6  has a generally U-shaped frame  62  and a post  61  having an end block  63  to be inserted in the confining recess  56  of the hollow plug  55 . 
   The post  61  is inserted in the hollow plug  55 . 
   The first musical instrument stand holds a guitar. 
   Referring to  FIG. 10 , a second musical instrument stand comprises a main shaft  3 ′ having a tube  31 ′. 
   The tube  31 ′ has a plurality of insertion holes  33 ′. 
   The bracket device  6  is inserted in one of the insertion holes  33 ′ of the tube  31 ′. 
   The musical instrument stand of the present invention provides the socket portion to be engaged with the movable fastening device stably. 
   The present invention is not limited to the above embodiment but various modification thereof may be made. Furthermore, various changes in form and detail may be made without departing from the scope of the present invention.