Bicycle Handlebar Stem Auxiliary Latch Assembly
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Solution Overview
Problem
The existing handlebar stem assemblies for bicycles are cumbersome to assemble due to the need for precise alignment and securement of the face plate and handlebar relative to the stem base using screws, which can be time-consuming and prone to misalignment.
Innovation Solution
A handlebar stem assembly with an auxiliary retention system that includes a latch and catch mechanism, allowing for easier alignment and securement of the face plate to the stem base, using a flexible latch that engages a catch to maintain the face plate's position, complemented by threaded fasteners for additional stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional screw fasteners are used to secure the face plate and handlebar to the stem base, then the assembly is stable and secure, but the assembly process becomes time-consuming and complex
Solution Approach 1:
The latch is pre-positioned on the face plate and the catch is pre-positioned on the stem base during manufacturing. During assembly, the user simply needs to insert the handlebar and the latch automatically engages with the catch, eliminating the need for time-consuming screw fastening operations while maintaining secure attachment.
Solution Approach 2:
The invention extracts the time-consuming screw fastening operation from the assembly process and replaces it with an automated latch-catch engagement mechanism. The fastening function is separated from the alignment function, allowing the latch to handle securing while the handlebar insertion handles positioning.
2Reliability
If traditional screw fasteners are used to secure the face plate and handlebar to the stem base, then the connection is secure, but the assembly process becomes prone to misalignment
Solution Approach 1:
The invention segments the assembly process into two independent functions: alignment (handled by the handlebar insertion through the stem base) and securing (handled by the latch-catch engagement). This separation ensures that alignment precision is not compromised by the securing operation, as the latch engages automatically once the handlebar is inserted.
Solution Approach 2:
The latch mechanism is designed to automatically align and engage with the catch during the handlebar insertion process. The latch self-positions itself relative to the catch through the insertion motion, eliminating the need for precise manual alignment by the assembler while maintaining secure connection.
3Reliability
If multiple fasteners are used to secure the face plate and handlebar, then the assembly is more stable, but the device complexity increases
Solution Approach 1:
The invention merges the alignment and securing functions into a single integrated latch-catch mechanism. Instead of using multiple separate fasteners for different purposes, the latch simultaneously handles positioning and securing operations, reducing the overall number of components and simplifying the assembly process while maintaining stability.
Data Source
AI summary
A bicycle including a main frame, a front fork rotationally coupled to the main frame, a rear wheel rotationally coupled to the main frame, a front wheel rotationally coupled to the front fork, a handlebar, and a stem assembly coupling the handlebar to the front fork. The stem assembly includes a stem base coupled to the front fork, a face plate coupled to the stem base with the handlebar sandwiched between the face plate and the stem base, and an auxiliary retention system that holds the face plate engaged with the stem base.