Abstract:
A microphone stand structure allows an upper frame rod to be elevated automatically for adjustment to a proper elevation after a locking seat is released. A pressure rod is received and mounted in a hollow main frame rod and includes an extensible member having a top end supporting a bottom end of the upper frame rod movably inserted into the hollow main frame rod such that the whole stand height can be selectively fixed simply locking the locking seat.

Description:
TECHNICAL FIELD OF THE INVENTION 
       [0001]    The present invention relates to a microphone stand adjusting structure, and more particularly to a microphone stand lifting structure capable of the convenient placement of a microphone and the arbitrary adjustment of the height thereof. 
       DESCRIPTION OF THE PRIOR ART 
       [0002]    Conventional microphone stands are generally divided into single tube typed stand and double tube typed stand constituted by a upper tube inserted in a lower tube and being extensible to change an assembly height, the latter being more popular. The double tube typed stands are configured with a fixing seat in the middle thereof for the locking upon the extension or contraction adjustment thereof so as to adjust the height of the whole stand, thereby to be in response to a user&#39;s height so as to achieve sound receiving convenience and sound effect assurance. However, since the structure thereof are too simple and the assembled stand is too long, the inner tube being extended from or inserted into the outer tube usually is not smooth upon the extension or contraction adjustment. Especially, longer insertion assembly will cause shaking such that it is difficult to be used in important occasions or performances. To overcome the defects mentioned above, tripod structure for the stable placement of a musical instrument, such as Taiwan Patent No. M267586, titled “adjustable musical instrument tripod”, are developed. The patent mentioned above uses the separate support of the equally spaced support rods of the bottom tripod seat operated in coordination with the configuration of the central main rod to carry out the vertical adjustment of the musical instrument accepting rod by means of the collapsing adjustment of the main support rod, thereby achieving a musical instrument placement stabilization effect. However, the locking and releasing operations thereof are very minute and complicated upon adjustment such that it is not possible for the tripod to be adjusted in the middle of a performance; it may be a secure design, but not suitable for use in a performance in which the placement height of a microphone is always needed to change timely according to the heights and postures of performers. 
       SUMMARY OF THE INVENTION 
       [0003]    To overcome the defects of the conventional microphone stand mentioned above, which are inconvenient and unpractical in use and adjustment, the present invention is proposed. 
         [0004]    The main object of the present invention is to provide a microphone stand structure, allowing a upper frame rod to be elevated automatically and adjusted, extended to a proper elevation after a locking seat is released by inserting an extensible pressure lever in a hollow main frame rod, and the whole stand height can be fixed simply by locking the locking seat, thereby achieving the convenience, practicality and security of microphone placement and stand adjustment. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0005]      FIG. 1  is an exploded view of a microphone stand structure of the present invention; 
           [0006]      FIG. 2  is a perspective view of a microphone stand structure of the present invention; 
           [0007]      FIG. 3  is a schematic view of a microphone stand structure of the present invention upon the reduction of the height thereof; and 
           [0008]      FIG. 4  is a schematic view of a microphone stand structure of the present invention upon the increasing of the height thereof 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0009]    The present invention is a microphone stand adjusting structure, mainly setting a support stand for the placement and use of a microphone into two-part telescopically adjustable structure. Referring to  FIGS. 1 to 4 , the structure includes: a hollow tubal main frame rod  10 ; and a tripod set  20 , adapted to support collapsible operating frames and locked to the bottom of the main frame rod  10 , and having collapsible enforced linkages  21  in connection with the peripheral of a central base  11  and in equal connection with respective tripod rods  22 , where ends of the tripod rods  22  are respectively coupled pivotally equally to the outer peripheral of the fixing seat ring  12 , thereby allowing the collapsing operation of the tripod set  20 . Furthermore, the whole main frame rod  10  is passed through the fixing seat ring  12  to insert in and assemble on the base  11 , thereby being locked and connected integrally thereto. Thereupon, the collapsing angle of the supporting tripod can be adjusted properly and a microphone supporting height can be changed together with a tripod grounding area by changing the position of the main frame rod  10  locked by the central fixing seat ring  12 . Furthermore, a pressure lever  13  capable of telescopic operation is fixed on the bottom inside the hollow main frame rod  10 , and the bottom end of the lever  13  is locked directly from the outside of the bottom generally by a bolt shank  23  to the central base  11  adapted to support the main frame rod  10 . Furthermore, the top end of the pressure lever  13  is locked with a disc seat  14 , the outer rim of which has an indented stepped annular groove  14 , and the top rim of the whole main frame rod  10  is configured with a locking seat  15 ; a plastic cover  151  is configured on the inner annular surface of the locking seat  15 ; a locking lever  152  configured on one side of the locking seat  15  allows the plastic cover  151  inside to control the locking and loosing of the collapsing. Putting the locking seat  15  around the top end of the main frame rod  10  is to limit the highest extended position of the disc seat  14  on the top end of the pressure lever  13  not to go beyond the bottom end of the locking seat  15 . Furthermore, the bottom end of a upper frame rod  16  can be propped against and positioned on the stepped annular groove  14  of the disc seat  14  after the upper frame rod  16  is inserted in the main frame rod  10 , thereby keeping an overlapping insertion of a considerable depth with the locking seat  15 . Thereafter, the locking seat  15  can be used to clamp the upper frame rod  16  properly, achieving assembly and use safety and stabilization. This mutual contact assembly allows the upper frame rod  16  to be pushed high quickly by the extension of the pressure lever  13  to increase the placement height of the microphone  30  quickly to achieve the change control of the whole supporting height after the upper frame rod  16  is released from the locking seat  15 , and a user&#39;s hand will not hold the upper frame rod  16  until the upper frame rod  16  is extended to a proper position and, at the same time, the locking seat  15  may be locked tight so as to fix the assembly length of the whole stand. When the assembly length is too long and needs to be shorten, only pressing the upper frame rod  16  downward reversely is enough and the pressure lever  13  inside can be pressed down simply and smoothly. Because the bottom end of the upper frame rod  16  is positioned by the disc seat  14  and middle part thereof is slipping due to the locking seat  15 , the bottom end is fixed and the middle part is displaced in a way of touching the plastic cover  151  upon the extension of the upper frame rod  16  so as to achieve a smooth effect without shaking and to be very convenient for control. Furthermore, only the locking and loosing of the locking seat  15  can achieve the positioning simply and, because the whole assembly structure and outlook is similar to conventional tripod sets for the placement of a microphone, only the assistance of the extensible pressure lever  13  inside the hollow part of the main frame rod  10  and the locking and loosing of the locking seat  15  are needed to adjust the use height of a microphone  30 , thereby achieving a fast, extension-stable and safe effect. 
         [0010]    The microphone stand adjusting structure of the present invention is characterized in that the pressure lever  13  is fixed inside the hollow inner bottom of the main frame rod  10 , the movable side of the pressure lever  13  can be extended out stably, quickly and automatically with pressure, achieving the effect of pushing the upper frame rod  16  inside the main frame rod  10  upward to extend out a proper length, allowing a microphone or other musical instrument (not shown in the figures) placed on the top of the upper frame rod  16  to be displaced upward quickly and automatically. Furthermore, when the extension of the upper frame rod  16  is adjusted, the upper frame rod  16  can be driven upward automatically simply and slid smoothly after the locking seat  15  is loosed by the push of the pressure lever  13  inside the upper frame rod  10 , and only the locking seat  15  is needed to lock again when the microphone reaches the position of a required height; if the upper frame rod  16  is extended out too high, only the locking seat  15  is needed to loose, and the upper frame rod  16  can then be pressed down reversely to contract into the main frame rod  10  and, thereafter, the locking seat  15  can then be locked tight when the microphone reaches the position of a proper height, thereby achieving the accurate positioning of the microphone. In addition, because the middle part of the upper frame rod  16  is slid stably in contact with the plastic cover  151  of the locking seat  15  and the accurate propping of the bottom end of the upper frame rod  16  against the disc seat  14  upon the vertical displacement of the whole upper frame rod  16 , the stable slippage thereof can be carried out accurately without shaking to cause security concerns.