Adjustable Handlebar Fastener Structure to Prevent Rotation
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Solution Overview
Problem
Existing fasteners for securing objects to bicycle handlebars lack adjustability in diameter, leading to either improper fit or inadequate tightening, which can result in the fastener rotating and colliding with other bicycle structures during use.
Innovation Solution
A size-adjustable fastener comprising a first fastener with connection strips and limiting blocks, and a second fastener with connection holes and limiting holes, allowing the connection strips to be inserted into the holes to adjust the diameter of the through hole, ensuring a secure fit to the handlebar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the fastener uses a fixed diameter through hole, then the structure is simple, but it cannot adapt to different handlebar diameters
Solution Approach 1:
The fastener body is divided into multiple segments along its circumference, with each segment independently adjustable. The segmentation allows the fastener to adapt to different diameters by adjusting individual segments rather than requiring a completely different fastener size
Solution Approach 2:
The fastener transitions from a static fixed-diameter structure to a dynamic adjustable structure. The adjustable segments can be moved radially to change the overall diameter of the fastener, enabling it to adapt to different handlebar sizes while maintaining a relatively simple base structure
2Reliability
If the through hole diameter is larger than the handlebar diameter, then the fastener can be mounted, but it cannot be tightly fastened
Solution Approach 1:
The fastener provides dynamic adjustability allowing users to precisely match the through hole diameter to the handlebar diameter. This eliminates the gap between the fastener and handlebar while maintaining easy mounting through the adjustable mechanism
Solution Approach 2:
The fastener diameter parameter can be changed to match the handlebar diameter. By adjusting the segment positions, the effective diameter of the fastener is modified to achieve a tight fit without requiring force or complex installation procedures
3Reliability
If the fastener diameter is smaller than the handlebar diameter, then it can be tightly fastened, but it cannot sleeve the handlebar
Solution Approach 1:
The adjustable segments allow the fastener to expand to a larger diameter for easy installation over the handlebar, then contract to a tighter fit for secure fastening. This dynamic size change enables both easy installation and reliable security
4Reliability
If the fastener diameter is not adjustable, then the structure is simple, but it rotates and collides with other structures during use
Solution Approach 1:
The adjustable segments can be positioned to create an asymmetric or keyed configuration that prevents rotation. By adjusting the segment positions, the fastener can be customized to match the handlebar geometry, providing anti-rotation capability without requiring complex built-in anti-rotation mechanisms
Data Source
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AI summary
A size-adjustable fastener includes: a first fastener and a second fastener. The first fastener is arranged with connection strips; an end of the connection strip is arranged with a limiting block; a transverse cross section of the limiting block is larger than that of the connection strip; the second fastener defines connection holes; each connection hole is communicated with a limiting hole, and the limiting hole is located at a side of the connection hole; the connection strip is inserted into the connection hole from a side of the second fastener; the connection strip is moved to approach the limiting hole to enable the limiting block to abut against the other side of the second fastener, enabling an end of the second fastener to be connected to an end of the first fastener. The other end of the second fastener is connected to the other end of the first fastener.