Cushion Frame Belt Anchor Integration and Bracket Inversion
Solution Overview
Problem
Conventional cushion frames for conveyance seats have a high position due to the presence of anchor brackets and a complex structure, making it difficult to reduce their height and number of components, which limits their design flexibility and occupant comfort.
Innovation Solution
A cushion frame design featuring a connecting member that couples side frames, a fixing bracket with a reduced height, and an integrated belt anchor, eliminating the need for a separate anchor bracket, allowing for a lower position and fewer components, while enhancing mechanical strength and adaptability through a protrusion and connecting collar configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the fixing bracket is disposed in the inner side of the side frame, then the belt anchor can be fixed to the side frame, but the height of the fixing bracket cannot be reduced due to interference with the second side frame
Solution Approach 1:
The fixing bracket is disposed in the outer side of the first side frame, which is the opposite side from the conventional inner side disposal. This inversion of the disposal position allows the second fixing part to extend towards the second side frame without interference, enabling reduction of the fixing bracket's height while maintaining proper belt anchor fixation.
2Reliability
If a separate anchor bracket is used to fix the belt anchor pin, then the belt anchor can be securely fixed, but the number of components increases
Solution Approach 1:
The belt anchor is integrated directly into the second fixing part of the fixing bracket, eliminating the need for a separate anchor bracket. This merging of functions allows the belt anchor pin to be fixed securely to the side frame through the fixing bracket itself, reducing the total number of components while maintaining fixation reliability.
3Adaptability or versatility
If the cushion frame position is lowered to improve design flexibility and occupant comfort, then design flexibility and comfort improve, but the fixing bracket height must be reduced which causes interference with the anchor bracket
Solution Approach 1:
By inverting the disposal position of the fixing bracket to the outer side of the first side frame, the patent enables reduction of the fixing bracket height without causing interference. This allows the cushion frame to be positioned lower, improving design flexibility and occupant comfort while avoiding the interference problem that would otherwise occur.
Data Source
AI summary
A cushion frame for a conveyance seat is provided. The cushion frame comprises a first and a second side frame; a connecting member that couples the first side frame to the second side frame; a fixing bracket that comprises a first and a second fixing part; and a belt anchor that is disposed in the fixing bracket and is coupled to a seat belt. The first fixing part comprises a first plate-surface that is substantially parallel to a seat-width axis. The second fixing part comprises a second plate-surface that is substantially perpendicular to the first plate-surface and is situated in the opposite side of the second side frame across the first side frame. The belt anchor is fixed to the second fixing part.