Child Seat Back Assembly With Linked Headrest and Side Wings
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Solution Overview
Problem
Current child car seats have complex structures that are difficult to operate, particularly in adjusting the height of the headrest and width of the side wings to accommodate children of different body sizes.
Innovation Solution
A seat back assembly with a headrest and side wings that can fold and unfold relative to a backrest, driven by a sliding driving member on the headrest, allowing simultaneous adjustment of the headrest height and side wing width through a single driving member, simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the headrest height and side wing width are adjusted independently through separate mechanisms, then the adaptability to different body sizes is improved, but the device complexity increases and ease of operation deteriorates
Solution Approach 1:
The patent combines the headrest height adjustment mechanism and side wing width adjustment mechanism into a single integrated system. The driving member, which moves along the guide post when the headrest is adjusted, is mechanically linked to both the headrest and the side wings through pushing structures. This allows one adjustment operation to simultaneously control both the headrest position and side wing configuration, reducing structural complexity while maintaining adaptability.
Solution Approach 2:
The driving member serves multiple functions: it acts as both the actuator for headrest height adjustment and the actuator for side wing width adjustment. By making this single component universal, the patent eliminates the need for separate adjustment mechanisms, thereby simplifying the overall structure while preserving the ability to adapt to different body sizes.
2Adaptability or versatility
If multiple separate adjustment mechanisms are used for headrest and side wings, then the adaptability is improved, but the ease of operation deteriorates
Solution Approach 1:
The patent merges the control of headrest height and side wing width into a single operational sequence. When the user adjusts the headrest along the guide post, the driving member automatically translates this motion into corresponding side wing adjustments through mechanical pushing structures. This combined operation eliminates the need for separate adjustment steps, significantly improving ease of operation while maintaining full adaptability.
Solution Approach 2:
The system performs self-adjustment of the side wings based on the headrest position. Once the user positions the headrest, the driving member automatically pushes the side wings to the appropriate width configuration without requiring additional user input. This self-service mechanism simplifies operation by reducing the number of manual adjustment actions needed.
3Device complexity
If a single driving member controls both headrest and side wings, then the device complexity is reduced, but the reliability may deteriorate due to increased functional integration
Solution Approach 1:
While using a single driving member, the patent segments the adjustment process into distinct phases through the guide post structure. The guide post divides the motion path into different zones that correspond to different adjustment stages, ensuring that the driving member performs headrest adjustment and side wing adjustment in a controlled sequence. This segmentation maintains reliability by preventing interference between the two adjustment functions.
Solution Approach 2:
The guide post acts as an intermediary structure that mediates between the driving member's motion and the two adjustment functions. It provides a structured path that ensures the driving member first completes headrest adjustment and then transitions to side wing adjustment, maintaining reliable and predictable operation despite the integrated design.
Data Source
AI summary
The present disclosure discloses a seat back assembly including a backrest, a headrest and a side wing. The headrest is slidably installed at an upper end of the backrest, and the side wing is disposed on a side of the backrest and is capable of folding and unfolding relative to the backrest. The seat back assembly further includes a driving member, which is disposed on the backrest or the headrest and moves along with the headrest relative to the backrest. The headrest at least, relative to the backrest, has an initial position close to the backrest and an operation position driving the side wing to unfold relative to the backrest. The side wing is folded on the backrest when the headrest slides to a position between the initial position and the operation position.