Dual Latch Seat Assembly Reducing Part Count
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Solution Overview
Problem
Conventional dump and tumble rear row seat assemblies require multiple latch subassemblies and extensive cabling, leading to increased part count and complexity, which results in higher costs and reduced cost-effectiveness.
Innovation Solution
A redesigned seat assembly utilizing a single pair of reinforced lock and release seatback and floor latches, combined with free pivoting seatback and floor supported riser assemblies, reduces the number of individually engageable latch subassemblies from four to two and minimizes cabling requirements, while maintaining full fold/dump and tumble functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple latch subassemblies are used to ensure reliable seat locking, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple separate latch subassemblies into a single integrated latch mechanism. The latch assembly includes a latch body with integrated locking components that work together to secure both the seatback and seat bottom to the floor, eliminating the need for multiple separate latch subassemblies while maintaining reliable locking functionality.
Solution Approach 2:
The single latch assembly performs multiple functions: it secures the seatback to the floor, secures the seat bottom to the floor, and provides controlled release mechanisms for both components. This multi-functional design replaces what would traditionally require multiple specialized latch subassemblies.
2Ease of operation
If extensive cabling is used to connect multiple latch subassemblies, then operational control is improved, but device complexity increases
Solution Approach 1:
The patent integrates the control mechanisms for both seatback and seat bottom release into a single cable system. The cable connects to the latch assembly and provides coordinated control for releasing both components, eliminating the need for separate cabling for multiple latch subassemblies.
3Reliability
If four individually engageable latch subassemblies are used, then seating position security is improved, but manufacturing cost increases
Solution Approach 1:
The patent consolidates four separate latch subassemblies into a single manufactured unit. The latch assembly is produced as one integrated component or subassembly, reducing manufacturing steps, inventory complexity, and assembly operations while providing equivalent or superior security through its integrated locking design.
Solution Approach 2:
The single latch assembly is designed to perform all four locking functions (seatback and seat bottom securing to floor) within one manufactured unit, eliminating the need to produce and inventory four different latch subassembly types.
Data Source
AI summary
An improved seat assembly in which the first and second pairs of seatback and floor mounted latches associated with first and second sides of prior dump and tumble assemblies are substituted by an improved design incorporating a single reinforced lock and release seatback latch and either a single or pair of floor latches arranged on opposite sides of the seat. Additional supports include a free pivoting and secondary seatback latch, as well as an optional floor supported riser assembly in lieu of the second floor latch and which are positioned at alternating inboard/outboard seatback and floor locations of the seat assembly. In cooperation with the redesigned fully functional latches, the free pivot seatback and optional floor riser latches provide a cost advantageous design exhibiting reduced part count.