Pressure adjusting device of quick fixture

A pressure adjusting device of a quick fixture, comprising:

• a main member having a first end and a second end at opposite ends thereof;
• each ends having an opening;
• a fixed member fixed to the main member through the second end;
• a movable member movably connected to the main member through the first end, wherein the movable member has a first stop block received in the main member,
• an elastic member received in the main member and having opposite end connected to the fixed member and the movable member to urge the movable member;
• wherein the main member has a first plug connected to the first end of the main member;
• the first plug is provided with a first opening, and the first stop block is larger than the first opening;
• wherein the main member has a second plug connected to the second end of the main member;
• the second plug is provided with a second opening, and the second opening comprises a threaded hole, and the fixed member has a threaded section to be threaded with the second opening;
• and
• an auxiliary holder located at the second end of the main member, wherein the auxiliary holder comprises a nut;
• wherein the fixed member has a threaded section to be threaded with both the threaded hole of the second plug and the nut of the auxiliary holder in sequence, and the nut abuts against the second plug.