Rotational Handlebar Brake Control for Low-Hand-Strength Riders
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional bicycle hand-braking systems are inefficient for riders with small or weak hands, as they require significant finger strength to actuate the brake levers, and pedal brakes can only actuate the rear wheel, which is not ideal since 75% of braking power is generated by the front wheel.
Innovation Solution
A handlebar configured to rotate, allowing users to apply rotational force to actuate a braking system using both hands and forearms, which can independently or jointly control both front and rear brakes, and a rotational hand brake mechanism that includes a cable seat or pushrod mount to transfer force through cables or hydraulics to the braking mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional brake levers are used, then the braking system can be actuated, but riders with small or weak hands experience difficulty in actuating the brakes
Solution Approach 1:
The patent transitions from linear lever actuation to rotational handlebar actuation. Instead of pulling a lever along a straight line, the rider rotates the handlebar around its longitudinal axis, utilizing forearm rotation rather than finger strength. This dimensional change from linear to rotational motion provides mechanical advantage and enables riders with weak hands to operate the brakes effectively.
Solution Approach 2:
The patent introduces a cable seat or pushrod mount coupled to the handlebar as an intermediary mechanism. This intermediary transfers the rotational force applied to the handlebar into linear force through a cable or rod to actuate the braking mechanism. The intermediary converts the rider's rotational input into the linear motion required by the brake system, providing mechanical advantage.
2Power
If pedal brakes are used, then the rear wheel can be braked, but the front wheel which generates 75% of braking power cannot be braked
Solution Approach 1:
The rotational handlebar mechanism serves as a universal control that can independently or jointly actuate both front and rear brakes. By coupling the handlebar rotation to a force transfer mechanism, the system can distribute braking force to either wheel or both wheels simultaneously, providing multi-functionality and ensuring that the front wheel, which generates 75% of braking power, can be effectively braked.
3Reliability
If hands are removed from the handlebar to actuate brake levers, then the brakes can be applied, but reaction time is reduced and control is compromised
Solution Approach 1:
The patent merges the steering function and braking function into a single integrated control mechanism. The handlebar serves both as the steering input and the brake actuator. By combining these functions, the rider can maintain hand contact with the handlebar for both steering and braking operations, eliminating the need to remove hands from the handlebar to apply brakes, thus preserving reaction time and control.
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 solution provides a mechanical advantage, allowing riders to generate more efficient braking power using stronger forearm muscles, improves reaction time by keeping hands on the handlebar, and can be applied to both front and rear wheels, making it safer and more effective for various riding conditions.
Implementation Method 1
A rotational hand brake mechanism can provide a mechanical advantage, allowing a rider to utilize stronger forearm muscles to generate more efficient braking power
Implementation Method 2
the braking system actuates the brake pads configured to exert force upon (e.g., squeeze) a rim of a bicycle wheel, tire, drum, hub or brake disc
Data Source
AI summary
Various technologies for reducing a speed of land vehicle by rotating its handle bar. A device comprises: a handlebar having a longitudinal axis; a seat coupled to the handle bar; a line coupled to the seat; and a brake coupled to the line, wherein the handlebar is rotatable about the longitudinal axis such that the seat moves and thereby controls the brake via the line.