Cajon Hitting Device Foot Pedal Mechanism
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Solution Overview
Problem
Conventional cajon hitting devices are complex and costly due to the need for a pedal assembly and wire system, which complicates assembly and increases production time.
Innovation Solution
A simplified hitting device design featuring a base with a pivoting portion, a retractable spring, and a driving member, such as a linking rod or chain, that allows for direct foot tread operation to rotate a shaft and swing a cajon hitter radially, eliminating the need for a pedal assembly and wire system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pedal assembly and wire system are used to connect the pedal to the hitting assembly, then the cajon can be hit, but the device becomes complicated and assembly time increases
Solution Approach 1:
The patent removes the pedal assembly and wire system from the conventional design. The hitting assembly is repositioned to be directly mounted on the base, eliminating the need for the complex pedal-wire connection mechanism while maintaining the core hitting functionality through direct structural integration
Solution Approach 2:
The hitting assembly is merged directly with the base structure. The post that holds the shaft is assembled directly to the front portion of the base, combining what were previously separate components (pedal assembly, wire system, hitting assembly) into an integrated unit that reduces overall complexity
2Reliability
If a pedal assembly and wire system are used to connect the pedal to the hitting assembly, then the cajon can be hit, but assembly cost and time increase
Solution Approach 1:
The patent removes the pedal assembly and wire system from the conventional design. The hitting assembly is repositioned to be directly mounted on the base, eliminating the need for the complex pedal-wire connection mechanism while maintaining the core hitting functionality through direct structural integration
Solution Approach 2:
The hitting assembly is merged directly with the base structure. The post that holds the shaft is assembled directly to the front portion of the base, combining what were previously separate components (pedal assembly, wire system, hitting assembly) into an integrated unit that reduces overall complexity
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 solution reduces material costs and simplifies assembly, enabling rapid and efficient production of a cajon hitting device while maintaining effective percussion functionality.
Implementation Method 1
A retractable spring is provided at one side of the post for rotating the shaft resiliently in the opposite direction when the shaft is rotated
Implementation Method 2
The bar member is pivoted at the pivoting portion... When the treading portion is treaded, the first end of the bar member is pivoted about the pivoting portion, so that the bar member drives the driving member to move longitudinally and the arm drives the shaft to rotate
Data Source
AI summary
A hitting device for cajon includes a base having a cajon hitting assembly, a shaft, and a driving portion assembled thereon. When the treading portion is treaded, the first end of the bar member is pivoted about the pivoting portion, so that the bar member drives the driving member to move longitudinally and the arm drives the shaft to rotate along a direction where the cajon hitter moves forward the hitting surface of the cajon.