Auxiliary Handlebar Clamp Lock to Prevent Accidental Unlocking
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Solution Overview
Problem
Auxiliary handlebars for additional passengers on bicycles are not securely mounted, risking discomfort and safety due to potential manipulation of vehicle controls.
Innovation Solution
A mount system comprising a stem, fastener, clamp, and clamp lock with a linkage and cam lever that allows for secure attachment and locking of auxiliary handlebars to primary handlebars without requiring tools, featuring a two-stage locking mechanism and adjustable clamping pressure to mitigate out-of-plane rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If auxiliary handlebars are mounted to primary handlebars, then additional passengers can control the vehicle, but the mounting security is insufficient and controls may be manipulated accidentally
Solution Approach 1:
The mounting mechanism is divided into distinct functional segments: the clamp structure for securing to the primary handlebar, the cam lever for applying clamping force, the linkage for motion transformation, and the lock for maintaining the locked state. This segmentation allows each component to perform its specific function efficiently while contributing to overall mounting security without requiring a monolithic complex mechanism
Solution Approach 2:
The cam lever is designed to pre-load the clamp onto the primary handlebar before the lock is engaged. This preliminary action ensures that the clamp is already securely positioned and applying sufficient clamping force when the lock is activated, preventing accidental manipulation from the outset rather than relying solely on the lock mechanism
2Stability of the object's composition
If a secure locking mechanism is implemented, then mounting stability is improved, but the ease of operation decreases due to complex locking procedures
Solution Approach 1:
The mechanism transitions dynamically between two stable states: unlocked and locked. The cam lever rotates to transform the clamp from an open, easily adjustable state to a locked, stable state. This dynamic state transformation allows the system to provide ease of operation during installation/removal while maintaining stability during use, as the transition between states is simple but the states themselves are stable
Solution Approach 2:
The linkage acts as an intermediary between the cam lever and the clamp. When the cam lever rotates, the linkage transforms this rotational motion into the appropriate clamping motion, mediating between the simple user input (rotating the cam lever) and the complex required action (securing the clamp firmly to the handlebar). This intermediary mechanism simplifies the user's operation while achieving the desired stable mounting
3Reliability
If clamping pressure is increased to prevent out-of-plane rotation, then mounting reliability improves, but the risk of accidental unlocking increases
Solution Approach 1:
The lock mechanism applies a preliminary counter-action to the clamping force. While the clamp applies inward pressure to secure the auxiliary handlebar, the lock simultaneously applies an opposing constraint that prevents the clamp from releasing. This preliminary anti-action ensures that the high clamping pressure does not create a risk of accidental unlocking, as the lock is already positioned to counteract any release tendency
Solution Approach 2:
The mechanism provides mechanical feedback through the interaction between the cam lever, linkage, and lock. When the clamp is properly secured with appropriate clamping pressure, the linkage positions the lock in a stable locked state. This feedback mechanism ensures that the system responds appropriately to the applied clamping force, maintaining reliability while preventing accidental unlocking through proper mechanical state interlocking
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 system provides a secure and easy-to-use mounting solution that prevents accidental unlocking and ensures the safety of both the rider and the additional passenger by maintaining a stable attachment of auxiliary handlebars to primary handlebars.
Implementation Method 1
a cam lever rotatably connected to the linkage; wherein the clamp lock is configured to selectively lock the clamp
Data Source
AI summary
A mount for an auxiliary handlebar, the mount comprising: a stem; a fastener configured to receive the auxiliary handlebar; a clamp configured to secure the mount to a primary handlebar; and a clamp lock comprising: a linkage rotatably connected to the stem; and a cam lever rotatably connected to the linkage; wherein the clamp lock is configured to selectively lock the clamp.