Retractable Chuck for Drumstick Angle Adjustment
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Solution Overview
Problem
Conventional foot drums have a fixed drumstick angle and require complex disassembly for angle adjustments, and their large size complicates portability, failing to meet practical and utilization needs.
Innovation Solution
A chuck structure with two arched plates and a retractable chuck, including a fastening element, allows quick adjustment of the drumstick's angle on a non-circular revolving shaft without disassembling the foot drum, and can be used with a percussion practice plate for portable percussion practice.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the drumstick is fixed on the non-circular revolving shaft with a constant relative angle, then the structural stability is improved, but the adaptability deteriorates because the placement angle cannot be changed without complex disassembly
Solution Approach 1:
The drumstick support structure is segmented into multiple components: the non-circular revolving shaft, the retractable chuck with clamping arms, and the arched plates. This segmentation allows the drumstick to be clamped at different angular positions on the shaft without disassembling the entire foot drum, enabling angle adjustment while maintaining overall structural stability
Solution Approach 2:
The retractable chuck mechanism transforms the static fixed-angle connection into a dynamic adjustable connection. The clamping arms can be moved radially to engage with the non-circular shaft at different angular positions, and the drumstick placement angle can be changed by simply adjusting the chuck position rather than disassembling the structure
2Reliability
If the conventional foot drum structure is used, then the drumstick can be firmly fixed, but the device complexity increases and portability deteriorates due to the massive volume of the practice drum
Solution Approach 1:
The drumstick support and angle adjustment functionality is extracted from the main foot drum body into a separate retractable chuck mechanism. This allows the angle adjustment feature to be added without increasing the overall structural complexity of the foot drum, and the practice drum can be replaced by smaller alternative targets
3Adaptability or versatility
If the drumstick placement angle needs to be changed in the conventional structure, then the adaptability is improved, but the loss of time increases due to tedious disassembling and assembling processes
Solution Approach 1:
The retractable chuck is pre-configured with multiple engagement positions on the non-circular shaft, allowing the drumstick to be quickly positioned at different angles by simply moving the chuck radially. This preliminary preparation of engagement positions eliminates the need for time-consuming disassembly and reassembly operations
Data Source
AI summary
A chuck structure for fixing a drumstick on a non-circular revolving shaft of a foot drum includes a retractable chuck, two arched plates and a fastening element. The two arched plates clamp the non-circular revolving shaft. An inner arched surface of each arched plate has an inner fastening surface correspondingly clamping the non-circular revolving shaft, and an outer arched surface of each arched plate has a spiked surface. The retractable chuck includes a fastening portion and a rotating portion, which are pivotally connected to each other, clamp the two arched plates, and are penetrated by the drumstick. Each of the fastening portion and a rotating portion has a clamping surface abutting against the spiked surface. The fastening member propels and rotates the rotating portion, so as to allow the retractable chuck, spaced by the two arched plates, to clamp and fasten on the non-circular revolving shaft.