Support Leg Anti-Pinch Structure for Child Safety Seat

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Solution Overview

Problem

Existing child safety seats have a gap between the support leg and cover that can pinch users' fingers during rotation, posing a risk of injury, especially for children's active nature.

Innovation Solution

A support leg anti-pinch structure with a sliding piece movably connected between the support leg and cover, utilizing a torsion spring to cover the rotational gap, ensuring the sliding piece slides relative to the cover, and a locking mechanism to prevent pinching.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a support leg is set at the front end of the support leg cover to prevent child safety seat movement, then the support leg can effectively prevent the seat from moving during sudden braking, but a gap is created between the support leg and cover that can pinch users' fingers during rotation

Engineering Contradiction:

Improvesupport leg stabilityVSAvoidfinger pinching risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

A sliding piece is introduced as an intermediary component between the support leg and support leg cover. This sliding piece moves along with the support leg during rotation and effectively covers the gap that would otherwise pinch fingers, while not interfering with the support leg's stabilizing function

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The support leg cover is divided into multiple parts: the main cover body and a sliding piece that can move independently. This segmentation allows the sliding piece to dynamically cover the rotational gap while the main cover maintains its structural integrity and support function

Inventive Principle:

Principle #1Segmentation

2Object-affected harmful factors

If a sliding piece is added to cover the rotational gap and prevent finger pinching, then finger pinching risk is eliminated, but the device complexity increases

Engineering Contradiction:

Improvefinger pinching riskVSAvoidstructure complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The sliding piece is designed to move dynamically with the support leg during rotation. It slides along the inner wall of the support leg cover, automatically covering the gap when the support leg rotates and retracting when not in use. This dynamic design eliminates the need for complex mechanical linkages or additional actuating mechanisms

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The sliding piece utilizes the rotational movement of the support leg itself to drive its own motion. As the support leg rotates, it naturally pushes the sliding piece along the inner wall of the cover, causing the sliding piece to cover the gap without requiring any additional power source or control mechanism

Inventive Principle:

Principle #25Self-service

3Shape

If the sliding piece is placed inside the support leg cover to be concealed, then aesthetics are improved and external dimensions are maintained, but the ease of manufacture decreases

Engineering Contradiction:

Improveconcealed structureVSAvoidassembly complexity

Core Design Contradiction:

ShapeVSEase of manufacture

Solution Approach 1:

The sliding piece is nested inside the support leg cover, moving along the inner wall. This nested configuration keeps the sliding piece concealed during normal use, maintaining the aesthetic appearance and external dimensions of the support leg assembly, while the simple sliding motion along the inner wall keeps manufacturing and assembly relatively straightforward

Inventive Principle:

Principle #7Nested doll (Nesting)

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

Prevents finger pinching during support leg rotation with a simple, low-cost structure that is concealed within the cover, maintaining movement functionality and external dimensions, providing a safe and aesthetically pleasing product experience.

Implementation Method 1

the support leg cover is provided with a torsion spring, the two ends of the torsion spring are connected to the support leg cover and the sliding piece respectively

Methodology Applied

Scientific EffectTorsion spring: Torsion Spring

Data Source

PatentEP4635793A1Support leg Anti-pinch structure and child safety seat

Publication Date: 2025.10.22 NINGBO BABY FIRST BABY PROD CO LTD

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AI summary

This disclosure relates to the field of child safety seat technology and discloses a support leg anti-pinch structure and child safety seat. It includes a support leg and support leg cover that are rotatably connected to each other, with a sliding piece movably connected between the support leg cover and the support leg. When the support leg rotates relative to the support leg cover, the sliding piece moves in the front-back direction to cover the rotational gap between the support leg and the support leg cover. Compared to existing technology, the support leg anti-pinch structure of this disclosure prevents users' fingers from being pinched in the gap during rotation due to the presence of a rotational gap between the support leg and support leg cover. The sliding piece covering this gap eliminates the risk of hand pinching during support leg rotation, with a simple structure and low cost.