Stroller Frame Folding Linkage for One-Step Lock and Fold
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Solution Overview
Problem
Conventional strollers require complex and inconvenient operations to fold the frame and seat portion, making them difficult to compact and store efficiently.
Innovation Solution
A frame folding mechanism with a planar linkage mechanism, where the handle, front foot, and rear foot are coaxially and pivotally connected, and a linking member is used to drive the seat portion to fold in linkage with the frame, along with a simple frame locking mechanism using a sliding member and unlock driving mechanism, and a backrest unlocking mechanism that allows the backrest to fold independently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional stroller folding mechanisms are used, then the frame and seat portion can be folded separately, but the operation becomes complicated and inconvenient
Solution Approach 1:
The patent combines the frame folding mechanism and seat portion folding mechanism into a single integrated system. The link rod connects the handle assembly (frame) and seat portion assembly, so that when the user operates one folding mechanism, both the frame and seat portion fold simultaneously through the mechanical linkage, eliminating the need for separate operations
Solution Approach 2:
The link rod serves as an intermediary mechanical element between the handle assembly and seat portion assembly. It transfers the folding motion from one assembly to the other, coordinating their movement and ensuring they fold in a synchronized manner, thereby simplifying the user operation
2Productivity
If the frame and seat portion are folded separately, then each component can be folded independently, but the overall folding process becomes more time-consuming
Solution Approach 1:
The patent merges the folding actions of the frame and seat portion into a single operational sequence. Through the link rod mechanism, actuating one folding mechanism causes both assemblies to fold simultaneously, effectively doubling the folding speed compared to separate operations and reducing the time required to collapse the stroller
3Adaptability or versatility
If multiple separate folding mechanisms are used for frame and seat portion, then each can be controlled independently, but the structural complexity increases
Solution Approach 1:
The link rod mechanism serves multiple functions: it acts as a structural support element, a motion transfer mechanism, and a coordination device. This single component performs what would otherwise require separate mechanisms, reducing the overall part count and structural complexity while maintaining the ability to control both frame and seat portion folding
Data Source
AI summary
The invention provides a frame folding mechanism, a frame locking mechanism, a backrest unlocking mechanism and a stroller. A handle, a front foot, a seat portion and a linking member of the frame folding mechanism form a planar linkage mechanism. The handle and the front foot can be driven to rotate and fold toward a rear foot, so as to drive the seat portion to rotate and fold. The frame locking mechanism can drive a sliding member and a frame expansion locking member to slide by an unlock driving mechanism, such that the frame expansion locking member disengages from a handle locking hole and a front foot locking hole to unlock a frame. The backrest unlocking mechanism has a backrest locking member. The unlock driving mechanism can drive the backrest locking member to slide, such that the backrest locking member disengages from a backrest portion to unlock the backrest portion.