Bicycle Handlebar Mounting Structure Press Fit Design
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Solution Overview
Problem
Conventional bar-end type shifters require a tedious mounting process and lack the ability to freely rotate or pass electrical wires through the handlebar, making them difficult to position and operate efficiently.
Innovation Solution
A bicycle operating device with a press-fitting mounting structure that eliminates the need for tools and allows for easy orientation, featuring a holding member that deforms to securely fit into the handlebar, a through hole for electrical cables, and a compact design that integrates the electrical switch unit within the handlebar, enabling quick and secure mounting and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional expanders are used for mounting bar-end type shifters, then the mounting structure can securely fit into the handlebar, but the mounting process becomes tedious and requires tools
Solution Approach 1:
The patent removes the expander component from the mounting structure, replacing it with a press-fit design that directly inserts into the handlebar without requiring expansion mechanisms or additional tools. This extraction of the expander element simplifies the overall mounting process while maintaining secure attachment.
Solution Approach 2:
The mounting structure is designed to be self-installing through a press-fit mechanism that relies on the elastic deformation of the holding member to automatically secure itself into the handlebar without requiring external tools or expansion actions. The structure serves its own mounting function through material elasticity.
2Ease of manufacture
If conventional bar-end type shifters are used, then the shifter can be mounted on the handlebar, but it is difficult to pass electrical wires through the center of the handlebar
Solution Approach 1:
The mounting structure serves multiple functions: it provides secure attachment to the handlebar while simultaneously creating a through-hole pathway for electrical wires. This multi-functionality allows the same structural element to address both mounting and wire routing requirements, simplifying the overall system.
3Adaptability or versatility
If conventional bar-end type shifters are used, then the shifter can be mounted on the handlebar, but the user cannot freely rotate the shifter to position it in a preferred orientation
Solution Approach 1:
The mounting structure is designed to be dynamically adjustable during installation, allowing the user to rotate and position the shifter at any preferred orientation before final insertion. The press-fit mechanism with elastic holding member permits this rotational movement without requiring complex adjustment mechanisms or locking systems.
4Reliability
If expanders are used in the mounting structure, then the structure can securely fit into the handlebar, but the operating device becomes heavier
Solution Approach 1:
The expander component is completely removed from the mounting structure, eliminating the additional weight that expanders would contribute to the device. The press-fit design achieves secure mounting without requiring these extra mechanical elements.
Solution Approach 2:
The patent changes the mounting mechanism from an expansion-based system to a press-fit elastic deformation system. This parameter change in the mounting approach eliminates the need for expanders and their associated weight, while maintaining secure attachment through material elasticity and friction.
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 solution provides a quick, easy, and secure mounting process, allows for free rotation and orientation, and reduces the need for expanders, resulting in a lighter and more efficient bicycle operating device that can be easily integrated with handlebars of various sizes.
Implementation Method 1
the holding member may be at least partly elastically deformable. One potential advantage of this configuration is that the operating device may securely fit into the bicycle handlebar
Implementation Method 2
the holding member may be made of a resin material. One potential advantage of this configuration is that the coefficient of friction may be increased to secure the operating device to the handlebar
Data Source
AI summary
A bicycle operating device, having a center axis, comprises a mounting structure configured to be press fitted into a free end of a bicycle handlebar; and an operating structure for an operation of a bicycle component, the operating structure being coupled to the mounting structure.