Vehicle Seat Backrest Headrest Guide Part Integration

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Solution Overview

Problem

Existing vehicle seat backrests with headrests require additional components and complex assembly processes due to separate guide sleeves and locking mechanisms, increasing costs and complexity.

Innovation Solution

Integration of a single-piece guide part into the backrest support structure, combined with a latching element and unlocking slide, eliminates the need for additional guide sleeves and simplifies the locking device to two components, reducing assembly costs and interfaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate guide sleeves are used to connect the headrest to the backrest, then the connection is achieved, but the number of components and assembly complexity increases

Engineering Contradiction:

Improveconnection reliabilityVSAvoidassembly complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The guide part is integrated directly into the backrest support structure as a single piece, eliminating the need for separate guide sleeves. This merging of components reduces the total number of parts and simplifies the assembly process while maintaining the connection function between the headrest and backrest

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated guide part serves multiple functions: it guides the support rod, provides structural support, and forms part of the locking mechanism interface. By combining multiple functions into a single component, the design reduces complexity while maintaining reliability

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If additional guide sleeves and locking mechanisms are used, then the headrest connection is achieved, but the force path between headrest and backrest is lengthened

Engineering Contradiction:

Improveconnection strengthVSAvoidforce path length

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

By integrating the guide part directly into the backrest support structure, the force transmission path is shortened. The direct integration eliminates intermediate components (separate guide sleeves), creating a more direct and efficient force path from the headrest to the backrest structure

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If multiple separate components are used for the locking device, then the locking function is achieved, but the manufacturing cost increases

Engineering Contradiction:

Improvelocking reliabilityVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The guide part is manufactured as a single integrated component with the backrest support structure, eliminating the need for separate guide sleeves and reducing assembly steps. This integration significantly reduces manufacturing complexity and cost while maintaining locking reliability through the integrated locking element and guide part design

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP3048005B1Backrest of a vehicle seat with a headrest

Publication Date: 2019.04.24 SITECH SITZTECHNIK GMBH

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AI summary

The invention relates to a vehicle seat backrest (10) with a head pillow (62), and the backrest comprises at least one support rod. A support structure (12) of the backrest (10) is used for at least one guide piece (14) of at least one support rod.