Drummer Chair Securing Ring Geometry to Prevent Seat Rocking
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Solution Overview
Problem
Conventional securing assemblies for drummer's chairs fail to provide a stable support due to loose engagement between the cutout and boss, causing the chair to rock and distract the drummer during performance.
Innovation Solution
The securing assembly features a cylinder with an inclined cutout and a securing ring with an inclined boss, ensuring a firm engagement by allowing the boss to enter deeper into the cutout, eliminating relative movement and providing a stable support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cutout size is made larger than the boss size to allow smooth placement, then the ease of operation is improved, but the engagement becomes loose causing chair rocking
Solution Approach 1:
The patent applies asymmetry by making the boss and cutout non-circular in shape with complementary asymmetric profiles. The boss has a specific asymmetric cross-sectional shape that matches the asymmetric cutout shape in the cylinder, creating a shape-complementary fit. This asymmetric design allows the boss to be inserted smoothly while preventing relative movement, as the asymmetric shapes can only fit together in one orientation with full engagement.
2Stability of the object's composition
If the boss is rigidly received inside the cutout, then the stability is improved, but the ease of operation deteriorates due to difficulty in assembly
Solution Approach 1:
The asymmetric shape design allows the boss to be inserted smoothly into the cutout while achieving rigid engagement. The complementary asymmetric profiles guide the assembly process, ensuring proper alignment and full engagement without requiring force or complex alignment procedures.
3Ease of operation
If the boss is movably received inside the cutout, then the ease of operation is improved, but the stability deteriorates causing chair rocking during performance
Solution Approach 1:
The asymmetric shape design eliminates the play and movement between the boss and cutout by creating a precise shape-complementary fit. The asymmetric profiles ensure that when assembled, the boss is firmly engaged in the cutout with no relative movement possible, providing stable support during drumming performance.
Data Source
AI summary
A securing assembly for a drummer seat having a cylinder integrally formed on a bottom face of the base and having a cutout in a peripheral edge thereof and a securing ring connected to the cylinder and having a boss to be received in the cutout. The cutout has two opposed inclined side faces and a flat bottom face sandwiched between the two inclined side faces. The boss has two inclined sides corresponding to the two inclined side faces of the cutout and a connection face sandwiched between the two inclined sides and corresponding to the bottom face such that engagement between the inclined side faces of the cutout and the inclined sides of the boss and between the bottom face and the connection face allow the boss to be immovably received inside the cutout.