Rotatable Handlebar Assembly with Position Locking for Compact Parking
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Solution Overview
Problem
Traditional bicycles with large handlebars occupy excessive space when parked, leading to interference and scratching with adjacent vehicles, limiting parking capacity and user experience.
Innovation Solution
A handlebar assembly with a rotatable stem and limiting structure, allowing the handlebar to be rotated perpendicular or parallel to the frame, reducing its width and minimizing interference during parking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the handlebar is kept in a traditional horizontal position, then the user experience during riding is improved, but the space occupied during parking increases
Solution Approach 1:
The handlebar is designed to be rotatable relative to the stem through a rotatable sleeve structure, allowing it to dynamically change position between horizontal (for riding) and vertical/parallel (for parking). This dynamic adjustment capability resolves the contradiction by enabling the handlebar to adapt its configuration based on whether the bicycle is in use or parked.
Solution Approach 2:
The handlebar can be rotated from its traditional horizontal arrangement to a vertical or parallel arrangement relative to the bicycle frame, effectively changing its spatial orientation from one dimension (horizontal width) to another (vertical height or longitudinal alignment). This dimensional transformation reduces the handlebar's projection in the width direction, minimizing space occupation during parking while preserving the horizontal configuration for optimal riding ergonomics.
2Productivity
If the handlebar is rotated to reduce width, then parking efficiency is improved, but the stability of handlebar position deteriorates
Solution Approach 1:
The limiting structure with limiting members and limiting holes is designed to automatically engage when the handlebar reaches specific rotational positions (horizontal or vertical/parallel). This preliminary positioning mechanism ensures that once the handlebar is rotated to the desired configuration, the limiting members snap into the limiting holes to maintain stable positioning, preventing unintended movement during subsequent use or parking.
Solution Approach 2:
The limiting structure acts as an intermediary mechanism between the handlebar and stem, providing controlled rotational movement while ensuring stable positioning at specific angles. The limiting members and limiting holes serve as the intermediary elements that enable the handlebar to rotate freely during adjustment but lock firmly at predetermined positions, thus resolving the contradiction between rotatability and positional stability.
3Area of stationary object
If a limiting structure is added to enable rotation, then parking space utilization is improved, but the device complexity increases
Solution Approach 1:
The limiting structure is segmented into distinct components: limiting members attached to the stem and limiting holes provided on the handlebar. This segmentation allows each component to be independently manufactured and assembled, simplifying the overall design and manufacturing process while enabling the rotational functionality needed for compact parking.
Solution Approach 2:
The limiting structure is implemented locally at specific positions rather than requiring a complete redesign of the entire handlebar assembly. The limiting members are positioned at specific locations on the stem, and corresponding limiting holes are provided at specific angles on the handlebar, enabling rotation functionality with minimal additional complexity while achieving the goal of reduced parking space occupation.
Data Source
AI summary
A handlebar assembly includes a stem, a handlebar, and a limiting structure. A side circumference of the stem is provided with a limiting hole, and the handlebar includes a grip and a support tube, either of the support tube and the stem being rotatably sleeved with the other, and a side circumference of the support tube being provided with a positioning hole. The limiting structure includes a limiting member movably connected to the handlebar, the limiting member being capable of moving to an unlocking position and a locking position relative to the handlebar, at least a part of the limiting member being inserted into the positioning hole and the limiting hole simultaneously to lock the handlebar and the stem at the locking position, the limiting member being separated from the limiting hole and the positioning hole at the unlocking position, and the handlebar being rotatable relative to the stem.