Drum Hoop Fastening Device with Anti-Loosening Mechanism
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Solution Overview
Problem
Conventional drum hoops loosen due to vibration, causing the drumhead to lose tightness and affecting sound production, as existing solutions fail to effectively prevent bolt loosening during drum vibrations.
Innovation Solution
A drum hoop fastening device with a fixing member and a fastening member, where the fastening member has a circumferentially interfering exterior wall that prevents random rotation relative to the fixing member, using non-circular sections and radially deformable petals to maintain stability and allow for adjustable tightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional bolts are used to fasten the drum hoop, then the structure is simple and easy to manufacture, but the bolts loosen and shake easily due to vibration when the drum is hit
Solution Approach 1:
The fastening member employs a non-circular cross-section (such as square or rectangular) instead of a conventional circular bolt. This asymmetric geometry prevents rotational movement of the fastening member within the through hole, eliminating the loosening and shaking problem caused by drum vibration while maintaining structural simplicity
Solution Approach 2:
The fastening member incorporates a radially deformable section that can elastically deform under impact forces during drum vibration. This dynamic deformation capability allows the fastening member to absorb vibration energy and maintain secure engagement, improving reliability without significantly increasing structural complexity
2Reliability
If the drum hoop is adjusted frequently to maintain tightness, then the sound and tune can be maintained, but time is lost and operation becomes inconvenient
Solution Approach 1:
The fastening member with non-circular cross-section and radially deformable section provides self-locking functionality. The geometry prevents automatic loosening under vibration, and the deformable section maintains engagement pressure, allowing the fastening system to self-maintain its tightness without requiring frequent user adjustments
Solution Approach 2:
The special geometry of the fastening member preemptively counteracts the loosening force generated by drum vibration. The non-circular shape and radial deformability are designed to resist the specific vibrational forces that cause conventional bolts to loosen, preventing the problem before it occurs rather than requiring corrective adjustments
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively prevents the fastening member from loosening during drum vibrations, maintaining consistent sound and tune production by ensuring the drum hoop remains securely fixed to the drum shell, reducing the need for frequent adjustments.
Implementation Method 1
radially deformable petals to maintain stability and allow for adjustable tightness
Implementation Method 2
when the fastening member rotates, an exterior circumferential wall of the fastening member circumferentially interferes the fixing member
Data Source
AI summary
A drum hoop fastening device is provided for being disposed on a drum. A first connecting portion is arranged on a drum hoop, an exterior circumferential wall of a drum shell has a second connecting portion, the first connecting portion has a first through hole, the second connecting portion has a connecting hole, and the drum hoop fastening device includes a fixing member and a fastening member. The fixing member is abutted against the drum, and has a second through hole. The fastening member is disposed through the first and second through holes and screwed with the connecting hole for fixing the drum hoop on the drum shell, and when the fastening member rotates, an exterior circumferential wall of the fastening member circumferentially interferes the fixing member.