Vehicle Seat Adjusting Device Threaded Positioning Member
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Solution Overview
Problem
Conventional adjusting devices for vehicle seats face difficulties in installing positioning pins and stop features during assembly, requiring multiple staking processes that increase time, cost, and risk of mechanical damage, especially with customer-specific floor mounting and varying rail lengths.
Innovation Solution
A simplified assembly method using threaded components where a positioning member with a male thread is screwed into a corresponding female thread on a stop member, combining both the positioning pin and stop feature in a single step, reducing the need for separate staking processes and enhancing mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional staking processes are used to install positioning pins and stop features, then the adjusting device can be assembled, but the assembly time and cost increase
Solution Approach 1:
The patent combines the positioning pin and stop feature into a single integrated component that performs both functions simultaneously. The positioning pin has a positioning portion that engages with the guide rail to locate it relative to the vehicle floor, and a stop portion that limits the travel stroke of the sliding rail. This integration eliminates the need for separate staking processes for positioning pins and stop features, reducing assembly time and complexity while maintaining structural integrity
Solution Approach 2:
The positioning pin is designed as a multi-functional component that serves multiple purposes: it positions the guide rail relative to the vehicle floor, provides a stop feature for the sliding rail travel stroke, and can be installed through a single staking process. This universal component replaces what would traditionally require separate positioning pins and stop features, simplifying the assembly process and reducing the number of operational steps required
2Reliability
If multiple staking processes are used for positioning pins and stop features, then proper positioning and stopping are achieved, but the risk of mechanical damage increases
Solution Approach 1:
By merging the positioning pin and stop feature into one component, the patent reduces the number of staking operations from two separate processes to a single staking process. This reduction minimizes the cumulative risk of mechanical damage to the rails that could occur during multiple staking operations, while still achieving both positioning and stopping functions through the integrated component's design
3Adaptability or versatility
If conventional separate installation methods are used for positioning pins and stop features, then both functions are provided, but assembly cost increases
Solution Approach 1:
The integrated positioning pin combines both positioning and stop functions in a single component, eliminating the need to manufacture, inventory, and install separate positioning pins and stop features. This reduction in part count and assembly operations directly reduces manufacturing and assembly costs while maintaining both positioning and stopping functionalities through the component's dual-designed structure
Solution Approach 2:
The universal positioning pin component performs multiple functions (positioning and stopping) that would traditionally require separate components. This multi-functionality reduces the overall bill of materials, simplifies inventory management, and reduces assembly time and labor costs, making the adjusting device more cost-effective to manufacture and assemble
Data Source
AI summary
An adjusting device for longitudinal adjustment of a vehicle seat including: a guide rail 2 and a guided sliding rail 1; a stop member 7 mounted to the guide rail 2 for limiting the travel stroke of the sliding rail 1; and a positioning member 4 for positioning the guide rail 2, wherein the positioning member 4 has a first end and a second end fixed to the guide rail 2, a first threaded portion 40 is provided at the second end, extending through a through-hole 22 of the guide rail 2, and a positioning portion 44 for positioning the guide rail 2 relative to the vehicle floor is provided at the first end and outside of the hollow space 8. The first threaded portion 43 is in engagement with a second threaded portion 49 which is mated to the first threaded portion 43 and coupled with the stop member 7.