Single Folding Shaft Stroller Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing strollers have complex folding mechanisms requiring two-hand operation, making it inconvenient for users, especially those with babies, and lack adjustable features for varying user heights and figures.
Innovation Solution
A stroller with a single folding shaft mechanism using a roller and locking devices that allow the handle and front frame to pivot relative to the rear frame, enabling one-handed folding and adjustable seat and handle heights through sliders and position pins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional folding mechanism with release devices on both sides is used, then the stroller can be folded securely, but the folding operation requires two hands and becomes inconvenient
Solution Approach 1:
The patent combines the folding functions of both sides of the stroller into a single folding shaft that controls the folding of both left and right sides simultaneously. This merging of functions allows the user to fold the entire stroller with one hand by operating a single folding shaft, rather than needing to operate separate release devices on both sides
Solution Approach 2:
The single folding shaft serves multiple functions: it acts as both a folding mechanism and a locking mechanism. The folding shaft includes a locking portion that can engage with a locking hole to secure the stroller in either folded or unfolded state, combining what were previously separate folding and locking operations into a single component
2Ease of operation
If a single folding shaft is used to simplify folding operation, then one-handed folding is achieved, but the structural complexity of the shaft and locking mechanism increases
Solution Approach 1:
The folding shaft integrates multiple functions including folding control, locking, and positioning into a single component. The shaft includes a locking portion with a locking hole that can engage with a locking structure on the handle, combining what would traditionally be separate folding and locking mechanisms into one unified component
Solution Approach 2:
The folding shaft is designed with a nested structure where the locking portion is integrated within the shaft body. The locking hole is formed within the shaft, and the entire locking mechanism is contained within the folding shaft assembly, creating a compact nested structure that reduces overall complexity
3Adaptability or versatility
If fixed seat and handle heights are used, then the structure is simple, but the stroller cannot accommodate users with various heights and figures
Solution Approach 1:
The patent transforms the fixed seat and handle heights into adjustable dynamic structures. The seat height is made adjustable through a slider mechanism that can move along the frame, and the handle height is made adjustable through a telescopic structure with locking mechanisms, allowing both components to change position according to user needs
Solution Approach 2:
The handle is divided into multiple telescopic sections that can extend or retract to different lengths. Each section can be independently adjusted and locked at specific positions, allowing the handle height to be segmented into multiple adjustable levels to accommodate different user heights
Data Source
AI summary
A stroller utilizes a handle folding assembly and a front frame folding assembly for a compact, easy storing folded size. An axle of the handle folding assembly rotates when a wrench is operated with single hand and two first sliders are brought to approach axially to each other and detach from two fastening elements, making the handle rotatable and folding to a rear frame. A button of the front frame folding assembly is pressed with single hand (or a seat is detached from a seat bracket) to detach a second slider of the front frame from a roller to make the front frame rotatable and folding to the rear frame. The position pins accompanied with a plurality of position holes enable the stroller an adjustable height of a seat and the handle.