Rear Seatbelt Winder Holder Reinforcement for Deformation Control
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Solution Overview
Problem
Existing seat belt retractor supports for rear seats in vehicles face issues with deformation under significant tensile forces during accidents, leading to poor distribution of forces on welding points and a risk of rupture due to peeling at weld points.
Innovation Solution
Incorporating a reinforcement with a substantially vertical tab on the inner lateral side of the shelf, which can receive a control member for the seat or rear seatback, significantly stiffening the tablet and preventing bending, thereby maintaining a good distribution of load across all welding points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If a thin sheet metal shelf is used for the seat belt retractor support, then the mass is reduced and production is simplified, but the shelf deforms under tensile forces during accidents
Solution Approach 1:
The patent combines a thin sheet metal shelf with a reinforcement element to create a composite structure. The reinforcement, made from a different material or structural configuration, is integrated with the shelf to provide additional strength and rigidity without significantly increasing mass, thus resolving the contradiction between lightweight design and structural strength.
Solution Approach 2:
The shelf is divided into functional zones by adding a reinforcement element that segments the structural load paths. This allows the thin sheet metal to maintain its weight advantage while the reinforcement handles the tensile forces, preventing deformation during accidents.
2Stability of the object's composition
If the shelf is stiffened by adding reinforcement, then deformation is prevented and load distribution is improved, but the device complexity increases
Solution Approach 1:
Instead of reinforcing the entire shelf uniformly, the patent applies reinforcement only in specific critical areas where tensile forces are most concentrated during accidents. This localized approach maintains stiffness where needed while minimizing the overall structural complexity and number of components.
Solution Approach 2:
The reinforcement element is designed to integrate with the existing shelf structure, combining structural support and load distribution functions into a unified assembly. This merging reduces the number of separate components and simplifies the overall device complexity while achieving the desired stiffness.
3Strength
If the shelf thickness is increased to prevent deformation, then strength is improved, but the mass increases and production cost rises
Solution Approach 1:
The patent uses a composite construction combining thin sheet metal with a reinforcement element, achieving the strength of a thick shelf without the corresponding mass increase. The reinforcement provides the necessary structural integrity while the thin base material keeps the overall mass low.
Solution Approach 2:
Instead of changing the thickness parameter of the shelf material, the patent changes the structural configuration by adding a reinforcement element. This parameter change approach achieves improved strength-to-mass ratio without simply increasing material quantity.
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
The reinforcement effectively prevents excessive deformation and rupture of the shelf during accidents, ensuring a stable and secure attachment to the vehicle body while allowing for economic production and reduced mass.
Implementation Method 1
one branch of which is spot-welded to the shelf
Data Source
Figure 1~3
Figure 4~8
AI summary
Rear seat belt retractor support of a motor vehicle, comprising a shelf (12) formed by an elongated sheet metal along the longitudinal direction of the vehicle, intended to be arranged substantially horizontally in this vehicle, having an external lateral fold (14) intended to be fixed on a quarter panel lining sheet of the body of this vehicle, a rear part (20) intended to be fixed on a rear pillar of this body, and fixing holes for the retractor, characterized in that it comprises an added reinforcement (60) which is fixed on the shelf (12).