Two-Layer Seat Pad Skin Locking Without Clips
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Solution Overview
Problem
Conveyance seats with two-layer pad members face increased manufacturing costs due to the use of locking members like clips to fix the skin to the seat pad, which complicates the assembly process and increases component count.
Innovation Solution
A conveyance seat design that integrates a protruding portion on the second pad member to lock the skin without the need for clips, utilizing a hole portion for locking and an elevated portion to prevent damage, with a bent tip for enhanced stability and a thicker base for increased strength, allowing for a more straightforward and cost-effective assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If locking members such as clips are used to fix the skin to the seat pad, then the skin can be securely fixed, but the number of components increases and manufacturing cost increases
Solution Approach 1:
The protruding portion is integrally formed with the second pad member, merging the fixation function into the existing pad member structure. This eliminates the need for separate locking members like clips, thereby reducing component count while maintaining secure skin fixation.
Solution Approach 2:
The second pad member provides its own fixation function through the protruding portion that locks into the hole portion of the skin. This self-service mechanism eliminates the need for external locking members, simplifying the overall structure while ensuring reliable skin attachment.
2Reliability
If locking members such as clips are used to fix the skin to the seat pad, then the skin can be securely fixed, but manufacturing cost increases
Solution Approach 1:
By integrating the protruding portion directly into the second pad member through integral formation, the patent eliminates the need to manufacture and assemble separate locking members. This consolidation reduces part count, simplifies manufacturing processes, and lowers overall production costs while maintaining secure skin fixation.
3Ease of manufacture
If the protruding portion is made with uniform thickness, then manufacturing is simple, but strength may be insufficient at the tip
Solution Approach 1:
The protruding portion features variable thickness with a thicker base portion and a thinner tip portion. The thicker base provides structural strength and rigidity where needed, while the thinner tip allows for easier insertion into the hole portion. This non-uniform thickness distribution optimizes both strength and manufacturability.
Data Source
AI summary
There is provided a conveyance seat in which in a seat pad composed of two layers of pad members, the number of components is reduced by fixing a skin to the seat pad without using a locking member such as a clip. A conveyance seat includes a seat pad; and a skin covering the seat pad. The seat pad includes a first pad member and a second pad member harder than the first pad member. The second pad member is provided with a protruding portion integrally formed with the second pad member to lock the skin. The skin is provided with a locked portion locked to the protruding portion.