Adjustable Child Car Seat Headrest with Sliding Side Cheeks
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Solution Overview
Problem
Existing child car seats with fixed headrest side cheek spacing are not suitable for young children whose heads are small, as their head width increases significantly between the ages of one and seven, requiring inadequate support during sleep.
Innovation Solution
A child car seat with an adjustable headrest that allows simultaneous height and width adjustments through horizontally movable side cheeks guided by oblong slots and grooves, ensuring easy and efficient scalability as the child grows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the side cheeks of the headrest are fixed in spacing, then the structure is simple and stable, but the seat becomes unsuitable for young children whose heads are small and require better support during sleep
Solution Approach 1:
The headrest side cheeks are made movable relative to each other through a mechanical linkage system. The operating finger moves along an inclined guide groove in the backrest, which converts vertical movement into horizontal separation of the side cheeks. This dynamic adjustment allows the headrest to adapt to different head sizes while maintaining structural integrity through guided motion paths.
Solution Approach 2:
The operating finger is nested within the headrest structure, moving along a guide groove that is integrated into the backrest. The side cheeks are positioned within the headrest assembly, allowing compact storage when not in use. The entire adjustment mechanism is contained within the existing headrest footprint, minimizing additional space requirements.
2Duration of action of moving object
If the headrest height is adjustable, then the seat can be used for a relatively long period of infancy, but the spacing between the side cheeks remains fixed and inadequate for growing children
Solution Approach 1:
The patent combines height adjustment and width adjustment functions into a single integrated mechanism. Moving the headrest vertically along the backrest simultaneously adjusts both the height position and the spacing between side cheeks through the inclined guide groove. This merged mechanism allows the seat to adapt to both height growth and head width growth of the child, extending the usable period significantly.
Solution Approach 2:
The adjustment mechanism transforms one-dimensional vertical movement into two-dimensional adjustment by incorporating an inclined guide groove. As the headrest moves vertically, the operating finger travels along the inclined groove, which converts part of the vertical displacement into horizontal separation of the side cheeks. This dimensional transformation enables simultaneous height and width adjustment from a single degree of freedom.
3Adaptability or versatility
If the side cheeks are made movable to adjust width, then the seat adapts to growing children, but the mechanism becomes more complex
Solution Approach 1:
The adjustment mechanism is designed to be self-actuating through the inclined guide groove geometry. When the user moves the headrest vertically, the operating finger automatically follows the inclined groove path, which automatically separates the side cheeks to the appropriate width. No additional actuators, motors, or complex control systems are needed - the geometry of the guide groove itself provides the adjustment logic.
Solution Approach 2:
The operating finger acts as an intermediary element that transfers motion from the vertical headrest movement to the horizontal side cheek separation. The inclined guide groove serves as a mechanical mediator that converts the direction and magnitude of movement. This intermediary mechanism simplifies the overall system by using passive geometric conversion rather than active control systems.
Data Source
AI summary
The invention concerns a seat (1) comprising a back (2) provided in its upper part with a headrest (5) adjustable in height including two side walls (6, 7), designed to support the child's head, mounted mobile and guided horizontally on a support plate (9) vertically mobile along the back (2). Each of the side walls (6, 7) comprises a maneuvering finger (13, 14) which, when the support plate (9) moves vertically relative to the back (2), slides simultaneously in a horizontally elongated corresponding guiding slot (11, 12), formed in the support plate (9) and in an elongated corresponding guiding groove (18, 10) formed in the back (2), substantially inclined relative to the general axis (A) of the back (2) so as to move away towards the top of the back (2), such that the vertical movement of the support plate (9) relative to the back (2) causes the spacing of the side walls (6, 7) of the headrest (5) to be modified.