Detachable Chair Back Support Locked by the Safety Bow
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Solution Overview
Problem
Existing children's chairs, such as the Tripp Trapp®, face challenges in adapting to changing safety regulations and user needs without requiring physical modifications or tools, especially in providing adequate back support for older children and adults, while maintaining safety and allowing for easy updates to comply with varying regional standards.
Innovation Solution
A back support device for children's chairs that integrates left and right arms which lock into existing openings or grooves in the backrest or side pieces using the existing safety bow, eliminating the need for tools and allowing for intuitive installation and removal, while maintaining the chair's adjustability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a back support device is added to an existing children's chair to meet new safety regulations, then back support and safety are improved, but the chair structure becomes more complex and requires additional components
Solution Approach 1:
The back support device is designed as a separate, detachable component that can be added to existing chairs without modifying the original structure. This segmentation allows the safety enhancement to be independent from the chair's base design, resolving the contradiction by adding functionality without permanently complicating the chair structure.
Solution Approach 2:
The back support device utilizes the existing safety bow and track system of the chair, nesting the new support structure within the existing framework. The arms of the back support device engage with the existing tracks, and the safety bow serves dual purposes by both securing the child and locking the back support device in place.
2Adaptability or versatility
If the back support device is made detachable for easy removal and relocation, then adaptability and ease of operation are improved, but the reliability and security of attachment may be compromised
Solution Approach 1:
The back support device employs self-locking arms that automatically secure themselves into the tracks through elastic deformation. When the arms are inserted, their elasticity causes them to expand and lock firmly into place without requiring additional fastening mechanisms, providing both easy installation and reliable attachment.
Solution Approach 2:
The arms of the back support device are designed with curved elastic sections that allow them to flex during insertion and then spring back to lock securely. This elastic curvature enables the arms to adapt to the track geometry while maintaining a strong locking force, balancing ease of attachment with security.
3Ease of manufacture
If the back support device uses existing safety bow and tracks without modification, then ease of manufacture and adaptability to existing chairs are improved, but the device complexity increases due to integration requirements
Solution Approach 1:
The back support device is designed to be universally compatible with chairs that have tracks and a safety bow, using these existing components for multiple functions. The safety bow serves both its original purpose of securing the child and the new function of locking the back support device arms in place, eliminating the need for separate fastening mechanisms.
Solution Approach 2:
The locking mechanism for the back support device is merged with the existing safety bow system. The safety bow's tension and positioning are utilized to simultaneously secure the child and lock the back support arms, combining two functions into one existing component and simplifying the overall integration.
Data Source
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AI summary
The present invention concerns a back support device (60) for use in a children's chair (1) wherein the children's chair comprises at least one backrest, two side pieces (5), one seat plate (2) and one safety bow (100) with ends (101), wherein the safety bow (100) is detachably fastened to the side pieces (5) and wherein the backrest or the side pieces have at least one opening or groove each, wherein the back support device (60) comprises: a top part (61) stretching beyond the backrest in height; left and right arms (63) for at least partly inlay in the opening(s) or groove(s) in the backrest or the side pieces; wherein parts of the arms (63) are locked in said opening(s) or groove(s) by the safety bow (100). The invention also concerns the use of the back support device, and a children's set comprising the back support device and use of the children's set.