Kettledrum Skin Tensioning Link Mechanism
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Solution Overview
Problem
Existing devices for setting the tension of a musical instrument's skin, such as a kettledrum, require high forces to adjust, leading to uneven load distribution and undesirable vibrations, affecting the instrument's ease of use and tonal quality.
Innovation Solution
A device with a link divided into two pivotally interconnected parts, where the coupling and support means are positioned close to the pivot, allowing for a favorable transmission ratio and accurate tension adjustment with minimal force, enabling a simple, compact, and ergonomic design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single link is used for tension adjustment, then the structure is simple, but high forces are required and force distribution is uneven
Solution Approach 1:
The single link is divided into two separate link parts (first link part and second link part) that are pivotally connected. This segmentation allows the force application point to be separated from the coupling means, creating a lever arm that reduces the force required for tension adjustment while maintaining structural simplicity.
2Force
If high forces are applied to the frame, then tension adjustment is effective, but uneven load distribution causes undesirable vibrations
Solution Approach 1:
The harmful effect of uneven force distribution is eliminated by extracting the force application point from the coupling means and relocating it to the operating face on the second link part. This separation allows the frame to experience only the necessary tension forces without the harmful uneven loads that cause vibrations.
3Ease of operation
If the link is divided into two pivotally interconnected parts, then force distribution is improved, but the device becomes complicated and heavy
Solution Approach 1:
The two link parts are merged through a pivotal connection that allows them to function as a unified lever system. This merging maintains the force distribution benefits while keeping the overall structure compact and simple, avoiding unnecessary complexity and weight.
4Force
If coupling means are positioned far from pivot, then leverage is increased, but force distribution over frame becomes uneven
Solution Approach 1:
The problem of force distribution is solved by moving the force application to a different spatial dimension - the operating face on the second link part - while keeping the coupling means close to the pivot. This dimensional separation allows both leverage and even force distribution to be achieved simultaneously.
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
The device allows for even force distribution across the instrument's frame, reducing the need for high forces and improving tonal quality and ease of operation, while maintaining a lightweight and compact construction.
Implementation Method 1
By means of the operating means, the first link part can be pivoted about the pivot so that, due to the distance between the pivot and the coupling of the coupling means to the first link part, a displacement of the coupling means is obtained
Data Source
AI summary
The invention relates to a device for setting the tension of a skin, and a musical instrument such as a kettledrum provided with such a device. The device comprises a frame, a first link part and a second link part, both having a longitudinal direction, wherein, adjacent a first end, the first link part is connected to the second link part for pivoting relative to each other about a pivot which extends approximately at right angles to the longitudinal direction, while, adjacent a second end opposite the first end, the first link part is connected to setting means which comprise support means receiving support from the frame, which support means are located between the first and second end of the first link part, while adjacent a second end opposite the first end, the second link part comprises an operating face for operating means, while coupling means are connected to the second link part between the first end second end thereof, the first and second link part extending in said longitudinal direction at the same side of the pivot.