Child Car Seat Insert with Curved Thigh Calf Surface
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Solution Overview
Problem
Existing motor car chairs for children, particularly small ones, often have angular bending between the cushion and backrest, which can cause respiratory and digestive issues due to improper positioning, and existing inserts may not be suitable for all chair designs, leading to discomfort and potential health problems.
Innovation Solution
A motor car chair with a shell seat design featuring a concave curved junction between the backrest and cushion, accompanied by an insert with a thigh and calf surface converging at a right angle and a convex surface, ensuring a straight line alignment of the child's head and torso, and made of soft plastic with protective fabric for comfort and hygiene.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the cushion and backrest are positioned at an angular bending (as in prior art), then the chair structure is simple, but the child's respiratory and digestive functioning is impaired
Solution Approach 1:
The chair is divided into two main segments: a shell seat providing structural support and an insert providing the physiological positioning surface. This segmentation allows the insert to create the necessary angular bending for respiratory and digestive functioning while the shell seat maintains structural simplicity.
Solution Approach 2:
The insert acts as an intermediary element between the child and the shell seat. It mediates the interaction by providing the appropriate angular bending surface that supports the child's head, pelvis, and torso in a physiological position, thereby preventing respiratory and digestive disorders while keeping the main chair structure simple.
2Object-affected harmful factors
If an insert is added to correct the angular bending, then the child's physiological functioning is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The insert is nested within the shell seat structure, fitting into the space defined by the converging backrest and cushion portions. This nesting approach allows the insert to provide the necessary physiological support without requiring a completely redesigned chair structure, thus limiting the increase in device complexity.
Solution Approach 2:
The insert features a convex curved surface that corresponds to the concave curved surface formed by the shell seat's backrest and cushion. This curvature design provides ergonomic support for the child's body while maintaining a relatively simple geometric form that is easy to manufacture.
3Ease of operation
If the insert has a convex curved surface corresponding to the concave surface, then the child's positioning is optimized, but the manufacturing precision requirements increase
Solution Approach 1:
The insert design specifies a convex curved surface with parameters that correspond to the concave surface of the shell seat. By defining specific geometric parameters for the insert, the patent enables optimized child positioning while providing clear manufacturing specifications that balance precision requirements with manufacturability.
Data Source
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AI summary
The invention provides a motor car chair 1 for a child and an insert 6 of a motor car chair for a child, to be mounted on a cushion of a motor car seat, intended for transporting a child, in particular a very small child in motor cars. A motor car chair (1) for a child mounted on a cushion of a motor car seat, having a shell seat (2) comprising a backrest portion (3) and a cushion portion (4) extending at an angle to each other and mutually converging, where the region of convergence of the backrest portion (3), the cushion portion (4) defining a concave curved surface (5) at the inner side of the shell seat (2) of the chair (1), is characterized in that the shell seat (2) of the chair (1) is provided with an insert (6) positioned at a site where the backrest portion (3) and the cushion portion (4) of the shell seat (2) of the motor car chair (1) for a child converge, where the insert (6) has a thigh surface (7) and a calf surface (8), converging at a substantially right angle and joined at the opposite side via a convex curved surface (9). An insert (1) of a motor car chair for a child, mounted on a cushion of a motor car seat having a shell seat (2) comprising a backrest portion (3) and a cushion portion (4) extending towards each other and mutually converging, where the region of convergence of the backrest portion (3) and the cushion portion (4) defines a concave curved surface (5) at the inner side of the chair (1) is characterized in that the insert (6) has a thigh surface (7) and a calf surface (8), converging at a substantially right angle and joined at the opposite side via a convex curved surface (9).