Rotational Joint for Children's Products with Linked Folding Mechanism
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Solution Overview
Problem
Existing children's products such as strollers and cribs with foldable structures often have complex linkage mechanisms involving multiple rods, making them cumbersome and inconvenient to unfold and fold.
Innovation Solution
A rotational joint with a novel structure that connects at least three support rods, featuring a linkage member that moves linearly and guide slots/pillars allowing for relative rotation, reducing the complexity and number of rods, and incorporating a lock mechanism for easy operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple rods are used to form a linkage mechanism for foldable structure, then the product can realize linked unfolding and folding, but the frame becomes complicated and operation becomes inconvenient
Solution Approach 1:
The patent combines multiple rod functions into a single rod structure. The first rod integrates the functions of multiple traditional linkage rods by incorporating guide slots for both the first and second connecting blocks, allowing one rod to control the motion of multiple connected components simultaneously, thereby simplifying the frame while maintaining linkage capability
Solution Approach 2:
The first rod serves multiple functions: it acts as a structural support, a motion guide for the first connecting block via its first guide slot, and a motion guide for the second connecting block via its second guide slot. This multi-functionality reduces the number of separate components needed in the linkage mechanism
2Adaptability or versatility
If multiple rods with linkage mechanism are used, then folding function is achieved, but the number of components increases making operation inconvenient
Solution Approach 1:
The patent merges multiple rod components into a single integrated first rod that contains both guide slots. This consolidation reduces the total number of rods from multiple separate linkage rods to just one primary rod, simplifying the overall structure while preserving the folding function
Solution Approach 2:
The first rod is segmented into functional zones with distinct guide slots for different connecting blocks. This segmentation allows the single rod to independently control the motion of multiple connecting blocks at different locations, achieving the function of multiple rods with a single component
Data Source
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AI summary
Disclosed are a rotational joint and a product for children having the rotational joint. The rotational joint comprises a first connecting base (1), a second connecting base (2) and a base (3) rotationally connected about a same rotation center line, the rotational joint further comprises a linkage member (4), and the linkage member (4) is arranged in such a manner that the linkage member is capable of only linearly moving relative to the base (3); one of the linkage member (4) and the first connecting base (1) is provided with a first guide slot (41), and the other one is provided with a first guide pillar (11), and the first guide pillar (11) is capable of being relatively slidably inserted in the first guide slot (41); one of the linkage member (4) and the second connecting base (2) is provided with a second guide slot (42), and the other one is provided with a second guide pillar (21), and the second guide pillar (21) is capable of being relatively slidably inserted in the second guide slot (42). When one rod member is driven to rotate, the other rod members can be linked to rotate relatively. The rotational joint can be used for products for children, such as strollers and child sitting saddles, to realize linked unfolding and folding of the respective rod members.