| 摘要 |
A dual adjusting holder includes two sets of adjusting holder engaged with a support mounted on a bass drum for holding percussion instruments. Each adjusting holder includes a first clamp and a second clamp to hold and grip a ball member. The first clamp has a first holding space, a rectangular through opening at one end and a first lug at another end. The second clamp has a second holding space, a round through opening at one end and two second lugs at another end pivotally engageable with the first lug. A fastening bolt is provided to engage the rectangular and round through opening for adjusting gripping force on the ball member such that the ball member may be turned to an angle desired. There is a sleeve attached to one side of the second clamp. The sleeve includes a stationary clamp arm and a movable clamp arm for engaging with the support at a position desired through a fastening screw. The ball member holds a strut for supporting the percussion instruments. By means of adjusting the fastening bolt and fastening screw, the adjusting holder may be secured easily and quickly at a position and angle desired.
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