Pedal Arm-Pad Overlap Structure to Prevent Disjoining
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Solution Overview
Problem
Existing pedal devices face challenges in maintaining a strong coupling between the connection link and the pedal pad due to insufficient overlap, making them prone to disjoin under external forces.
Innovation Solution
A pedal device design that includes a stopper part fixed to the pedal pad, with a first and second arrangement section holding the arm end in place, ensuring sufficient width to withstand external forces and maintain a robust connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a connection link is coupled to a pedal pad, then the pedal device can transmit operational force, but the coupling is prone to disjoin under external forces due to insufficient overlap
Solution Approach 1:
The patent transitions from a single-point or minimal-contact coupling to a multi-dimensional overlapping structure. The connection link is designed with an overlapping region that extends across multiple dimensions relative to the pedal pad, creating a distributed contact area that resists disjoining forces from multiple directions. This dimensional expansion of the coupling interface directly addresses the insufficiency of traditional minimal-overlap designs.
Solution Approach 2:
The connection link and pedal pad are merged into an integrated overlapping structure where the boundaries between components are blended through the overlap region. This merging creates a unified load-path that distributes external forces across the combined structure, preventing the separation that occurs in traditional discrete coupling arrangements. The overlap region effectively merges the structural integrity of both components.
2Device complexity
If the arm is coupled to the pedal pad with minimal overlap, then the device complexity is reduced, but the arm disjoins from the pedal pad under external forces
Solution Approach 1:
The coupling structure is segmented into distinct functional zones: the arm portion, the pedal pad portion, and the intermediate overlapping region. This segmentation allows each zone to be optimized for its specific function while maintaining overall simplicity. The overlapping region acts as a transitional segment that provides the necessary mechanical interconnection without requiring complex fastening mechanisms or multiple separate components.
Solution Approach 2:
The overlapping region serves as an intermediary structure between the arm and pedal pad, mediating the mechanical connection without requiring additional fasteners or complex joining mechanisms. This intermediate zone distributes and transitions forces between the two main components, providing a simple yet reliable connection that avoids the complexity of traditional multi-component coupling systems.
3Strength
If the overlap width between the connection link and pedal pad is increased, then the coupling strength is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent optimizes the overlap width parameter to achieve an optimal balance between coupling strength and manufacturing feasibility. By carefully selecting and standardizing the overlap dimension, the design ensures sufficient mechanical strength while maintaining tolerance ranges that are achievable with conventional manufacturing processes. This parameter optimization allows the coupling to be strong without requiring ultra-precise manufacturing.
Solution Approach 2:
The overlapping region is designed with locally optimized geometry and material properties tailored to the specific stress conditions in that zone. The local structure of the overlap area is enhanced to maximize strength where it is most needed, while other portions of the components can be manufactured with standard precision. This localized quality enhancement ensures high coupling strength without requiring the entire component to be manufactured with excessive precision.
Data Source
AI summary
An arm includes an arm one end and an arm body extended from the arm one end. The arm is coupled with a pedal pad at the arm one end and is coupled with a reaction force generation mechanism on an counter-operation side. A stopper part is a component separate from the pedal pad and fixed to the pedal pad. One part, which is one of the pedal pad and the stopper part, includes a first arrangement section, and the other part, which is the other of the pedal pad and the stopper part, includes a second arrangement section. The first arrangement section and the second arrangement section interpose the arm one end therebetween and hold the arm one end against the pedal pad.