Center-pull LATCH Mechanism for Secure Safety Seat Attachment
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Solution Overview
Problem
Conventional safety seat attachment systems to vehicle seats often face difficulties in applying sufficient tension, leading to insecure seating due to interference from straps or belts, making it hard to access and tighten the attachment devices properly.
Innovation Solution
A center-pull LATCH mechanism with a locking assembly and tensioning system that allows easy access to strap ends for tensioning, featuring a shell with a window for external access and a tensioning assembly using elastic straps to reduce slack, ensuring secure attachment to the vehicle seat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional straps or belts are used to attach safety seats to vehicle seats, then the attachment function is provided, but the straps interfere with the attachment process and make it difficult to apply sufficient tension
Solution Approach 1:
The attachment system is divided into separate functional components: a locking assembly that anchors to the vehicle seat, a base plate that attaches to the safety seat, and straps that connect these components. The locking assembly is further segmented with individual locking elements for each strap, allowing independent tensioning and reducing interference between straps during the attachment process.
Solution Approach 2:
A base plate is introduced as an intermediary component between the safety seat and the locking assembly. This base plate provides a stable attachment point for the straps and distributes the loading, preventing the straps from interfering with each other and with the attachment process. The base plate acts as a mediator that organizes the strap routing and tensioning mechanics.
2Reliability
If multiple straps are used to secure the safety seat, then the security and distribution of load are improved, but the complexity of accessing and tensioning each strap increases
Solution Approach 1:
Multiple locking elements are combined into a single integrated locking assembly that anchors to the vehicle seat. This consolidation provides a centralized access point for tensioning multiple straps simultaneously or sequentially, improving accessibility while maintaining the security benefits of multiple straps. The locking assembly merges the anchoring function for all straps into one location.
Solution Approach 2:
The locking assembly is positioned in a different spatial dimension relative to the base plate and straps, allowing strap ends to be accessed from a convenient location on the base plate rather than requiring access to the vehicle seat anchors. This dimensional repositioning of the tensioning interface improves ergonomics and accessibility while maintaining attachment security.
3Strength
If the locking assembly is positioned within the vehicle seat anchors, then the attachment strength is maximized, but the accessibility of the straps for tensioning is reduced
Solution Approach 1:
The base plate serves as an intermediary that transfers the attachment strength from the locking assembly (positioned at the strong vehicle seat anchors) to the straps. This mediator allows the locking assembly to remain in the optimal high-strength location while providing a more accessible interface on the base plate for strap tensioning. The base plate mediates between the strength requirement at the anchors and the accessibility requirement for the user.
Solution Approach 2:
The system separates the anchoring function (in the vertical dimension at the vehicle seat anchors) from the tensioning function (at the horizontal dimension of the base plate). This dimensional separation allows the locking assembly to engage strong anchors while presenting accessible strap ends at a convenient location on the base plate, resolving the conflict between strength and accessibility.
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
Facilitates easy and secure attachment of safety seats to vehicle seats by allowing straightforward tensioning of straps, reducing interference and enhancing safety by minimizing the risk of decoupling during crashes.
Implementation Method 1
The tensioning assembly may comprise one or more elastic straps
Data Source
AI summary
A base for a safety seat and method for manufacturing the same are provided. The base may have a shell defining a cavity therein with a locking assembly disposed within the cavity. The base may further include one or more straps having a first end and a second end extending through the locking assembly releasably engaging the straps with the first and second ends being disposed on opposing sides of the locking assembly. The straps may define a first portion extending from a connector to the locking assembly and a second portion extending from the locking assembly to the second ends. A tensioning assembly may be provided to apply a tension to the second portions. The one or more straps may include two straps configured to be accessed by a user parallel to a centerline of the base.