High Chair Tray Assembly With Roller-Guided Position Adjustment
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Solution Overview
Problem
High chairs with post and socket tray mounting designs suffer from high friction issues and difficulty in positional adjustment, making it hard for caregivers to easily remove and position the trays, which can lead to frustration and underutilization of the removable tray feature.
Innovation Solution
The design incorporates smaller lower trays with rearwardly extending horizontal posts and sockets equipped with rollers for smooth insertion, and a larger upper tray that is detachably mounted on the lower tray for positional adjustment, with a depression allowing access to the position adjustment actuator, enabling easy manipulation with one hand and reducing friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a post and socket tray mounting design is used, then the tray offers a strong interlocking connection with the high chair structure, but high amounts of friction occur between post and socket making adjustment difficult
Solution Approach 1:
A cammed actuator mechanism serves as an intermediary between the caregiver's manual input and the tray's connection to the high chair structure. The cammed surface converts rotational motion into linear displacement that overcomes friction and engages/disengages the tray from the socket, making adjustment easier while maintaining strong connection when engaged
Solution Approach 2:
The tray mounting system transitions from a static friction-based connection to a dynamic system where the cammed actuator can easily transition the tray between engaged and disengaged states. The cam mechanism provides mechanical advantage that dynamically overcomes the friction barrier during adjustment while maintaining structural integrity when locked
2Device complexity
If the snack tray is directly attached to the high chair seat, then the tray structure is simplified, but the caregiver must lift the child up and over the snack tray to seat or remove the child
Solution Approach 1:
The tray system is segmented into multiple components: a removable snack tray that can be detached from the main tray, and a main tray that attaches to the high chair structure. This segmentation allows the snack tray to be removed entirely, clearing the path for child placement while maintaining structural simplicity through modular design
Solution Approach 2:
The snack tray is extracted as a separate, removable component from the main tray assembly. This extraction allows the snack tray to be completely removed when not needed, eliminating the obstacle of lifting children over the tray while keeping the main tray structure simple and attached to the high chair
3Adaptability or versatility
If the large tray is positionally adjustable on the snack tray, then adaptability to different child sizes is improved, but the device complexity increases
Solution Approach 1:
A cammed actuator serves as an intermediary mechanism that simplifies the control of tray positional adjustment. The cammed surface converts simple rotational motion into precise linear positioning, providing adaptability to different child sizes while keeping the user interface simple and the overall mechanism manageable
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
This solution eliminates friction problems between tray posts and sockets, allowing for easy tray positioning and adjustment, making it easier for caregivers to use the high chair's multiple tray system, especially when handling a child.
Implementation Method 1
sockets equipped with rollers for smooth insertion
Data Source
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AI summary
A high chair is equipped with a multiple tray system (30) that is positionally adjustable relative to a high chair structure (10). The tray system (30) includes a lower tray (32) formed with rearwardly extending horizontal tray posts (35) that are received within horizontally aligned Sockets (28) formed in the high chair structure (10). The distal end of each tray post (35) is provided with a first roller (36), and each socket (28) has a second roller (29) to provide for smooth insertion of the tray posts (35) into the sockets (28). An upper tray (40) is detachably mounted on the lower tray (32) for positional adjustment therewith relative to the high chair structure (10) by releasing the tray posts (35) for movement within the sockets (28). The upper tray (40) is formed with a depression (42) to allow access to a position adjustment actuation mechanism (50). A tray insert (47) can be supported on the upper tray (40) to facilitate cleaning of the tray system (30).