Bicycle Cable Control Body with Stopping Member

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Solution Overview

Problem

Existing bicycle operating devices face challenges in achieving rapid response speeds due to limitations in the movement and positioning of cable control components, leading to inefficiencies in gear shifting and brake operations.

Innovation Solution

The bicycle operating device incorporates a cable control body, positioning pawl, stopping member, and biasing member, allowing for precise movement and positioning within a defined range, with pivotable and rotatable components to enhance control and compactness, and a restricting structure to limit excess movement, thereby improving response speed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the cable control body is allowed to move freely to reach target positions, then the response speed is improved, but excess movement causes positioning inaccuracies and operational errors

Engineering Contradiction:

Improveresponse speedVSAvoidpositioning precision

Core Design Contradiction:

SpeedVSManufacturing precision

Solution Approach 1:

The stopping member is designed to be movable relative to the cable control body, transitioning between a stopping state (engaging with the stopping pawl) and a non-stopping state. This dynamic configuration allows the system to adapt during operation: the stopping member restricts movement during positioning to ensure precision, then allows free movement during rapid repositioning to maintain high response speed.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The movable range of the cable control body is dynamically adjusted based on operational requirements. When rapid response is needed, the stopping member disengages allowing larger movement ranges. When positioning accuracy is critical, the stopping member engages to limit the movement range to a precise interval, thereby changing the operational parameters of the system.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If the stopping member is fixed to the cable control body, then the structure is simplified, but the cable control body cannot be precisely positioned within a defined range

Engineering Contradiction:

Improvestructural complexityVSAvoidpositioning precision

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The stopping member is divided into distinct functional portions: a stopping portion that engages with the stopping pawl to limit movement, and a movable connection portion that attaches to the cable control body. This segmentation allows independent optimization of each function while maintaining overall system simplicity.

Inventive Principle:

Principle #1Segmentation

3Reliability

If the cable control body moves beyond the target position to ensure reaching it, then the target position is reached, but the excess movement slows down the response speed

Engineering Contradiction:

Improvetarget position achievementVSAvoidresponse speed

Core Design Contradiction:

ReliabilityVSSpeed

Solution Approach 1:

The stopping member is positioned in advance at predetermined intervals along the cable control body's path. These pre-positioned stopping points guide the cable control body to approach the target position in controlled increments, preventing overshooting and eliminating the need for corrective reverse movements, thereby maintaining high response speed while ensuring reliable target achievement.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The engagement between the stopping pawl and stopping member provides mechanical feedback that indicates when the cable control body has reached a predetermined interval. This feedback mechanism allows the operating device to know when to stop applying force, preventing excess movement and enabling precise positioning without overshooting the target.

Inventive Principle:

Principle #23Feedback

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

This configuration enables faster and more precise control of the control cables, enhancing the response speed of the bicycle operating device by allowing the cable control body to approach target positions within a defined range while restricting excess movement, resulting in improved performance in gear shifting and brake operations.

Implementation Method 1

a biasing member configured to bias the stopping member relative to the cable control body in the first direction

Methodology Applied

Scientific EffectElastic force: Elasticity

Data Source

PatentUS10131406B2Bicycle operating device

Publication Date: 2018.11.20 SHIMANO INC

AI summary

A bicycle operating device comprises a base member, a cable control body, a positioning pawl, a stopping member, and a stopping pawl. The positioning pawl is movable between a holding position to stop a movement of the cable control body in a first direction, and a non-holding position to allow a movement of the cable control body in the first direction. The stopping pawl is movable between a stopping position to stop a movement of the stopping member in the first direction, and a non-stopping position to allow a movement of the stopping member in the first direction. The stopping member is coupled to the cable control body such that the cable control body is movable relative to the stopping member within a movable range while the stopping pawl is arranged at the stopping position.