Vehicle Headrest Assembly with Integrated Hooks and Foam
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Solution Overview
Problem
Existing headrest manufacturing processes for vehicle seats are costly and require multiple steps, failing to integrate safety standards effectively within a single process step using pour-in-place technology and attachment to a support rod.
Innovation Solution
A headrest design that combines a front part with hooks and a rear part with integrated side parts, assembled using pour-in-place technology, where the hooks irreversibly attach to the support rod, allowing for a one-step manufacturing process that includes injection molding of plastic and foam filling for stability, reducing production costs while maintaining safety standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional multi-step manufacturing processes are used for headrest assembly, then safety standards can be maintained through separate quality checks, but production costs increase and manufacturing time is extended
Solution Approach 1:
The patent combines multiple manufacturing operations into a single integrated process: the headrest shell is injection molded with built-in hooks, the support rod is attached during the same cycle, and foam is injected to complete the assembly. This merging of segmentation, connection, and filling operations into one continuous process achieves both high productivity and reliable safety standards through integrated quality control.
2Strength
If traditional assembly methods with stitching and multiple attachment steps are used, then structural integrity can be ensured, but manufacturing complexity and costs increase
Solution Approach 1:
The patent extracts and eliminates the stitching operation from the traditional assembly process. Instead of using needles and thread to attach the headrest cover, the design uses injection-molded hooks that mechanically engage with the support rod structure, securing the assembly through pure mechanical interlocking. This extraction of the stitching function simplifies manufacturing while maintaining structural integrity.
Solution Approach 2:
The patent replaces the mechanical stitching system with an injection molding-based mechanical connection system. The hooks are formed as integral parts of the injection-molded shell and engage with corresponding features on the support rod, creating a strong mechanical bond without requiring textile stitching operations. This substitution reduces manufacturing complexity while ensuring structural strength.
3Reliability
If separate production steps for headrest assembly and support rod attachment are used, then quality control can be maintained, but production time and costs increase
Solution Approach 1:
The patent incorporates preliminary action by pre-forming the attachment hooks as integral features of the headrest shell during the injection molding process, before the actual assembly with the support rod occurs. This preliminary preparation of connection elements allows the subsequent attachment step to be performed quickly and reliably in the same manufacturing cycle, reducing overall production time while maintaining quality control.
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 approach simplifies production, reduces costs, and ensures safety compliance by integrating the headrest assembly and attachment to a support rod into a single process, providing dimensional stability through foam filling and a secure, stitch-free assembly.
Implementation Method 1
a foam can be filled into the closed space, the foam being a rigid foam and/or a flexible foam... the interior of the headrest can be filled by introducing foams, such as polyurethane, and thereby give the headrest dimensional stability and stability
Implementation Method 2
the rear part with the integrated side parts is an injection molded part, the injection molded part comprising a plastic... the hooks of the rear part are firmly anchored immediately and irreversibly, simply by pressing them together
Data Source
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AI summary
The invention relates to a headrest (400) for a vehicle, said head rest (400) comprising a front part (200) and a back part (100) with integrated lateral parts (104). The front part (200) and the back part (100) with integrated lateral parts (104) are formed in a complementary manner such that when they are assembled together, a closed space in which a U-shaped curved support rod (300) can be inserted, is formed.