Reversible ISOFIX Connector Assembly for Lightweight Child Safety Seats
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Solution Overview
Problem
Current child safety seats with ISOFIX connectors are bulky, cumbersome, and heavy due to their design, which includes a separate base and a steel connector core that doubles in weight when elongated, and often fail to meet safety regulations with simple 180° rotation.
Innovation Solution
A child safety seat with reversible ISOFIX connectors featuring a self-rotating linkage assembly that allows the ISOFIX connection assembly to flip and self-rotate, adjusting the eccentric notch to comply with safety regulations, eliminating the need for a separate base and reducing weight by using a single ISOFIX connection assembly on both sides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate base is used with single-headed connectors, then connection stability is improved, but device volume and weight increase making it cumbersome to carry
Solution Approach 1:
The patent merges the base and seat body into a single integrated structure, eliminating the separate base component. The ISOFIX connectors are directly mounted on the seat body, combining functions that were previously separated into distinct components, thereby reducing overall weight while maintaining connection stability through direct mounting.
Solution Approach 2:
The seat body is designed to serve dual functions: as the seating structure and as the mounting platform for ISOFIX connectors. This multi-functionality eliminates the need for a separate base, reducing weight while ensuring that the connectors are securely attached to the seat structure itself.
2Adaptability or versatility
If the connector core is elongated to enable bi-directional installation, then installation versatility is improved, but weight doubles due to steel structure requirements
Solution Approach 1:
The patent employs a rotatable connector core that can rotate 180 degrees around its longitudinal axis. This dynamic capability allows the same connector to interface with ISOFIX sockets in both forward and backward directions, providing bi-directional installation versatility without requiring an elongated double-headed structure, thereby avoiding the weight penalty of doubled steel components.
Solution Approach 2:
Instead of extending the connector length in one dimension to achieve bi-directional capability, the patent introduces rotation in a different dimension (angular orientation). The connector core rotates around its longitudinal axis, allowing the eccentric notch to present the correct orientation for both forward and backward installations without increasing the connector's length or requiring additional material.
3Ease of operation
If the connector core is simply rotated 180° for direction switching, then ease of operation is improved, but safety compliance is violated as the eccentric notch orientation becomes non-compliant
Solution Approach 1:
The connector core is designed with rotational capability around its longitudinal axis, allowing it to dynamically adjust its orientation. When the seat direction needs to be switched, the connector rotates 180 degrees, maintaining the correct orientation of the eccentric notch relative to the ISOFIX socket, thus ensuring safety compliance while enabling easy direction switching.
Solution Approach 2:
The connector core features an asymmetric eccentric notch design that, when combined with 180-degree rotation capability, ensures that the notch always presents the correct orientation for safe connection. The asymmetric geometry, coupled with rotational freedom, guarantees that regardless of which direction the seat faces, the eccentric notch aligns properly with the ISOFIX socket to meet safety requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a lightweight, easy-to-carry child safety seat with secure and compliant connections to ISOFIX sockets, enhancing user convenience and safety compliance through adjustable eccentric notches and self-rotating mechanisms.
Implementation Method 1
The self-rotating linkage assembly includes a gear connected with the ISOFIX connection assembly and a gear rack fixedly attached to the underbody of the seat body, where the gear can mesh with the gear rack, enabling the ISOFIX connection assembly to self-rotate along its longitudinal axis during the flipping process.
Implementation Method 2
The self-rotating linkage assembly further comprises a flipping joint connected with the connection shaft, where the flipping joint is rotatably connected with the rotating connection end of the ISOFIX connection assembly.
Implementation Method 3
A locking assembly is provided between the ISOFIX connection assembly and the underbody of the seat body to lock the ISOFIX connection assembly when it is flipped and self-rotates to a preset position.
Data Source
AI summary
The present invention discloses a child safety seat with reversible ISOFIX connectors. Each side of a seat body is equipped with a single ISOFIX connection assembly and can be flipped forward or backward relative to the seat body, and the direction of the eccentric notch is adjustable during the flipping process by a self-rotating linkage assembly. After a direction change, the ISOFIX connection assembly the eccentric notch can be adjusted to a safety-compliant angle and connected to the ISOFIX sockets of the car seat.