Pedal Angle Adjusting Device for Musical Instruments
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Solution Overview
Problem
Conventional pedal devices for musical instruments, such as bass drums and high hat stands, do not allow for easy adjustment of the pedal inclination angle without affecting other parameters like the beater angle or operation feel, and often require cumbersome two-handed operations and are prone to obstruction during use.
Innovation Solution
A pedal device with a direct drive system that includes a pedal angle adjusting device allowing for easy adjustment of the pedal inclination angle using a pivotable and fixable mechanism, coupled to the coupling arms and the pedal, enabling single-handed operation and maintaining the beater angle and operation feel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the inclination angle of the pedal is adjusted by sliding the free end of the pedal vertically with respect to the link member or chain, then the inclination angle can be adjusted, but the adjustment requires two-handed operation and is troublesome
Solution Approach 1:
The pedal free end is designed with a protrusion that automatically engages with a groove on the link member at predetermined positions. This self-locking mechanism allows the pedal inclination angle to be adjusted by simply moving the pedal to the desired position, where it automatically locks without requiring manual fastening operations with both hands.
Solution Approach 2:
The adjustment mechanism is segmented into discrete predetermined positions along the vertical direction. The groove on the link member has multiple segments corresponding to different inclination angles, allowing the pedal to be adjusted to specific angles by engaging with different segments of the groove, rather than requiring continuous adjustment.
2Ease of operation
If the upper limit position of the shock absorber is changed to adjust the pedal inclination angle, then the inclination angle can be adjusted, but the height of the rod changes and the repulsive force of the pedal changes
Solution Approach 1:
The link member is designed with multiple grooves at predetermined positions along the vertical direction, each corresponding to a specific pedal inclination angle. When the pedal protrusion engages with a groove, it fixes the pedal at that specific angle while maintaining the rod at its original height position, thus preserving the spring compression amount and repulsive force characteristics.
Solution Approach 2:
The groove-protrusion mechanism acts as an intermediary that decouples the pedal inclination angle adjustment from the rod height adjustment. By engaging the pedal protrusion with different grooves on the link member, the pedal angle can be changed without affecting the vertical position of the rod, thereby maintaining consistent operation feel.
3Ease of operation
If the free end of the pedal is made protruding to enable vertical sliding adjustment, then the inclination angle can be adjusted, but the protruding portion may contact the toe of the performer or other parts and obstruct the stepping operation
Solution Approach 1:
The protrusion on the pedal free end is designed as a compact element that engages with grooves on the link member. This segmented design allows the protrusion to be positioned precisely at predetermined locations, minimizing its interference with the stepping operation while still enabling effective angle adjustment through groove engagement.
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
Enables easy and precise adjustment of the pedal inclination angle without affecting the beater angle or operation feel, improving user convenience and reducing the risk of obstruction during use.
Implementation Method 1
a tension coil spring, which is disposed at the rear side of the pedal and is coupled to the shaft and the pedal, the elastic force of which holds the pedal at an initial position
Data Source
AI summary
A pedal angle adjusting device is coupled to a coupling arm such as to be pivotable about an axis. Also, the pedal angle adjusting device is coupled to a free end of a pedal such as to be pivotable about an axis and arranged to be fixable to the free end of the pedal.