Vehicle Seat Harness Strap Orientation via Fixed Loops
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Solution Overview
Problem
Conventional vehicle seats, particularly in armored vehicles, face challenges in providing both firm and ergonomic support during accelerations while occupying minimal space, with existing solutions like the US2005/0264082 seat experiencing strap twisting and inadequate ergonomic alignment due to a single attachment point and insufficient space access.
Innovation Solution
A vehicle seat design featuring a backrest integral with the vehicle structure, with shoulder straps passing through fixed loops positioned between the backrest and a fixing means, allowing an adjustable angle between 0° and 45°, and using flexible bands with adjustable lengths for secure and ergonomic support, while allowing easy access to the passenger compartment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the two shoulder straps of the harness have a single attachment point at the end of a strap attached to the carrycot, then the structure is simplified, but the rigidity of the support is reduced and strap twisting occurs during accelerations
Solution Approach 1:
The invention divides the single attachment point into two separate attachment points on the carrycot. Each shoulder strap has its own dedicated attachment point, eliminating the common strap that causes twisting. This segmentation maintains structural simplicity while significantly improving support rigidity during accelerations.
2Device complexity
If the shoulder straps form an angle with the horizontal close to 90°, then the attachment structure is simplified, but the ergonomic support is insufficient
Solution Approach 1:
The invention introduces adjustable components including a telescopic rod with variable length and an adjustable angle mechanism. This allows the shoulder strap angle to be dynamically adjusted between 0° and 45° relative to the horizontal, optimizing ergonomic support while maintaining a simple attachment structure through the telescopic connection.
3Weight of stationary object
If the seat structure is made light and removable, then the space occupation is reduced, but the support effectiveness during longitudinal accelerations may be compromised
Solution Approach 1:
The invention uses a telescopic rod with collapsible structure that can be compressed into a compact form when not in use, reducing the space occupied by the seat. The rod maintains its structural integrity and load-bearing capacity during longitudinal accelerations, providing effective support while keeping the overall seat structure lightweight and removable.
Data Source
Figure 1
Figure 2
Figure 3a~4b
AI summary
The seat (1) has a flexible backrest (2) integrated to a section (5) of a vehicle structure. The backrest has orifices (15) allowing passage of ends of shoulder straps (10a, 10b) of a harness (9). The straps respectively traverse fixed loops (16a, 16b) positioned at the rear of the backrest. The loops are respectively arranged between the backrest and fixation units (17a, 17b) e.g. screws. The loops are integrated to the vehicle structure and located at height so as to assure orientation of the straps in relation to a horizontal plane with an angle of 0 to 45 degrees.