Vehicle Seat Backrest Trim Assembly for Easy Headrest Rod Mounting
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Solution Overview
Problem
The assembly of vehicle seat backrests is complex and time-consuming due to varying comfort and safety functions, requiring different assembly methods and skilled operators, while also needing easy mounting and dismounting with potential for trim replacement.
Innovation Solution
A vehicle seat backrest design featuring a backrest frame with a pad having slots for headrest support rods and finishing elements with notches, allowing for easy mounting and removal of the trim from the front, independent attachment of trim modules, and elastic interlocking for secure positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the backrest incorporates multiple comfort and safety functions with different assembly methods, then the functional versatility is improved, but the assembly complexity and time increase
Solution Approach 1:
The backrest is divided into modular trim elements that can be independently assembled. Each trim element can be attached to the backrest frame using the same slot mechanism, allowing different functional modules (comfort features, safety features) to be combined without requiring different assembly methods for each function.
Solution Approach 2:
The slot mechanism serves as a universal attachment system that can accommodate various trim elements with different functions. The same slot and trim element design is used across all functional variants, allowing one assembly method to serve multiple purposes and reduce overall assembly complexity.
2Manufacturing precision
If skilled operators are required to assemble different variants, then the assembly precision is improved, but the operational difficulty and training requirements increase
Solution Approach 1:
The trim elements are designed with self-aligning features that guide them into the correct position on the backrest frame. The slot geometry and trim element shape work together to automatically position components correctly during assembly, reducing the need for skilled operators to manually align parts.
Solution Approach 2:
Instead of requiring operators to fit complex shapes into precise positions, the design inverts the approach by using simple slot geometries that guide the trim elements into place. The constraint system is simplified so that the trim element dictates the assembly path rather than requiring precise manual positioning.
3Stability of the object's composition
If the upholstery is permanently attached to the backrest frame, then the structural stability is improved, but the ease of repair and trim replacement decrease
Solution Approach 1:
The attachment system transitions from permanent to dynamic/reversible. The slot mechanism allows trim elements to be easily inserted and removed while maintaining stable attachment during normal use. This dynamic attachment enables repair and replacement without permanent fixation.
Solution Approach 2:
The slots are pre-positioned in the backrest frame during manufacturing, allowing trim elements to be easily attached or removed later without requiring modification to the frame structure. This preliminary preparation enables future repairs while maintaining structural integrity.
4Shape
If multiple trim elements are used to cover slots, then the aesthetic appearance is improved, but the device complexity increases
Solution Approach 1:
Multiple trim elements are merged into a coordinated system where each element serves both aesthetic and functional purposes. The trim elements are designed to visually complement each other while maintaining the same attachment mechanism, so the overall appearance is enhanced without proportionally increasing complexity.
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 design enables consistent assembly time across different function variants, simplifies the assembly process, and allows for easy replacement of trim modules without affecting safety functions, improving operational efficiency and user experience.
Implementation Method 1
elastic interlocking
Data Source
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AI summary
A vehicle seat back (16) (10) comprises a frame (17) and a trim piece (36, 38, 40) attached to the frame (17). The trim piece (36, 38, 40) has a slot (96, 97) for receiving a headrest support rod (35) by relative movement of the trim piece (36, 38, 40) with respect to the frame (17) along a longitudinal direction (X) of the vehicle seat (10). The backrest (16) further comprises first and second trim elements (50; 52). Each trim element (50, 52) forms a notch (84, 95). The notches in the first and second trim elements (50, 52) define a passage (98) for a headrest support rod (35). The second trim element (52) partially covers the slot (96, 97) in the trim (36, 38, 40). The first and/or second trim elements (50; 52) is/are in contact with the trim (36, 38, 40).