Bicycle Shifting Device with Attachment Blocking Path
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Solution Overview
Problem
Existing bicycle operating devices lack a mechanism to prevent accidental shifting during braking operations, leading to potential misoperation and reduced rider control.
Innovation Solution
A bicycle operating device design featuring a base member with pivotally mounted operating members and an attachment that blocks specific paths to prevent shifting during braking, allowing for distinct operating paths for shifting and braking, ensuring the operating unit is securely retained and preventing accidental shifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the operating members are allowed to move freely along their operating paths, then the device can perform both shifting and braking operations, but accidental shifting may occur during braking operations
Solution Approach 1:
The attachment is provided with blocking portions that proactively prevent the operating members from moving along shifting paths during braking operations. This preliminary anti-action eliminates the possibility of accidental shifting before it can occur, resolving the contradiction between operational versatility and operation accuracy.
2Reliability
If an attachment is added to block operating paths and prevent accidental shifting, then operation accuracy is improved, but device complexity increases
Solution Approach 1:
The attachment is divided into multiple independent blocking portions, each responsible for blocking a specific operating path. This segmentation allows the attachment to be designed as a modular component that can be easily integrated into the existing device structure, minimizing the increase in device complexity while achieving the goal of preventing accidental shifting.
3Reliability
If the attachment blocks the operating paths, then accidental shifting is prevented, but the ease of operation is reduced
Solution Approach 1:
The attachment is designed to be removable, allowing users to dynamically adjust the blocking function based on operational needs. When the attachment is installed, it prevents accidental shifting during braking; when removed, full operational functionality is restored. This dynamic design resolves the contradiction between operation accuracy and operational convenience.
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
Enhances rider control by ensuring that the device can only perform braking operations when the attachment is engaged, preventing accidental shifting and providing a secure shifting mechanism when needed.
Implementation Method 1
The first operating member is pivotally mounted relative to the base member about a first pivot axis to move along the first operating path
Implementation Method 2
The first operating member is a lever that is pivotally mounted relative to the base member about a second pivot axis to move along a second operating path
Implementation Method 3
The attachment blocks the first operating path to prevent movement of the first operating member from reaching the operated position
Data Source
AI summary
A bicycle operating device is basically provided with a base member, a first operating member and an attachment. The base member has an interior space that is configured to receive an operating unit. The first operating member is configured to move along a first operating path from a rest position to an operated position to operate the operating unit when the operating unit is disposed in the interior space. The attachment blocks the first operating path to prevent movement of the first operating member from reaching the operated position.