Rapid fixing structure for height adjusting rod of musical instrument chair

A rapid fixing structure for a height adjusting rod of a musical instrument chair, used for adjusting a height of a musical instrument chair, comprising:

• an upright rod seat, the upright rod seat being provided with an up-to-down through receiving space and a side opening horizontally communicated with the receiving space;
• a pressing plate, the pressing plate being disposed at the side opening and pivoted to the upright rod seat, and possessing a normal position invading the receiving space and an instant position exiting from the receiving space;
• a return spring, the return spring being disposed between the pressing plate and the upright rod seat, and pushing the pressing plate to be at the normal position under a normal state;
• and
• an upright rod, the musical instrument chair being disposed at an upper end of the upright rod, the upright rod penetrating into the receiving space from up to down, and being provided with a plurality of height-different fastening slots in which the pressing plate is fastened at the normal position so as to fix the upright rod,
• wherein two opposite side plates extend out from the side opening of the upright rod seat, and the pressing plate is pivoted to the two side plates through a pivot shaft.