High Chair Harness Adjustment Mechanism for Faster Strap Positioning
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Solution Overview
Problem
Adjusting the safety harness in high chairs is tedious and time-consuming due to the need for weaving shoulder straps through slots, which is inefficient and requires significant effort.
Innovation Solution
An adjustable harness system with a vertical adjustment mechanism, featuring an attachment component fixed on the chair's backrest and an operable adjustment component that allows for simple and fast adjustment of shoulder straps, utilizing a tri-glide buckle and pulling tab for parallel and non-parallel forces to secure the strap, and optionally incorporating an infant insert that moves with the strap for seamless adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If shoulder straps are adjusted by weaving through slots in the backrest, then the restraint system can be adjusted for different heights and weights, but the adjustment process becomes tedious and time-consuming
Solution Approach 1:
The restraint system is divided into separate modular components: the shoulder strap assembly with adjustment mechanism is distinct from the backrest structure. This segmentation allows the adjustment mechanism to be optimized independently, enabling quick adjustment without requiring complex weaving through backrest slots, thereby reducing adjustment time while maintaining adaptability.
Solution Approach 2:
The adjustment mechanism incorporates dynamic elements including a sliding component that moves along the shoulder strap and a releaseable locking mechanism. This dynamic design allows for rapid adjustment by simply sliding the component to the desired position and locking it, eliminating the tedious weaving process while maintaining secure restraint for different child sizes.
2Adaptability or versatility
If shoulder straps are adjusted by weaving through slots in the backrest, then the restraint system can accommodate different child sizes, but the adjustment process requires significant effort
Solution Approach 1:
The adjustment mechanism is designed to be self-contained on the shoulder strap assembly, requiring no interaction with the backrest structure for adjustment. The sliding component and locking mechanism work together to provide self-service adjustment capability, allowing caregivers to quickly adjust the restraint system without complex manual weaving operations, significantly improving ease of operation while maintaining adaptability.
3Loss of time
If a complex adjustment mechanism is used to enable quick adjustment, then adjustment time is reduced, but the device complexity increases
Solution Approach 1:
The adjustment mechanism is extracted from the backrest structure and integrated into the shoulder strap assembly itself. This extraction simplifies the overall system by removing the need for complex interactions between the backrest and adjustment components. The mechanism uses a straightforward sliding and locking design with minimal parts, achieving quick adjustment while keeping device complexity low.
Solution Approach 2:
A simple sliding component serves as an intermediary element between the shoulder strap and the locking mechanism. This intermediary allows for smooth adjustment by translating linear motion into position changes, enabling quick adjustment without requiring complex mechanical linkages or multiple moving parts, thus maintaining simplicity while reducing adjustment time.
Data Source
AI summary
An adjustable harness and a chair therewith are disclosed. The adjustable harness includes an attachment component, an adjustment component, and a shoulder strap. The attachment component is fixedly disposed on a backrest of a chair. The adjustment component is disposed on the attachment component and capable of being operated to move relative to the attachment component. An end of the shoulder strap is connected to the adjustment component. Thereby, the attachment component and the adjustment component function as an adjustment mechanism, by which a user can simply and fast adjust the shoulder strap, so as to solve the problem of tediousness and time consuming in adjusting restraint systems in the prior art.