Vehicle Door Trim Pull Handle Connecting Device
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Solution Overview
Problem
In vehicle door trim and pull handle systems, the strong coupling force between the boss and boss coupling protrusion transfers collision energy to passengers during broadside collisions, leading to increased damage and the generation of sharp edges.
Innovation Solution
A connecting device with a sliding back prevention boss and a supporting boss, featuring a semi-cylindrical and cylindrical design respectively, along with guide grooves and ribs, and a collision absorbing hole, to absorb and distribute collision energy and prevent sliding back of the pull handle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the boss is inserted into the boss coupling protrusion to achieve strong coupling force, then the shaking phenomenon is removed and customer satisfaction is improved, but collision energy is transferred to the passenger side and sharp edges are generated during broadside collision
Solution Approach 1:
The patent introduces a cushioning member (elastomeric material) between the boss and the boss coupling protrusion to absorb collision energy before it reaches the passenger. This beforehand cushioning prevents the harmful effect of energy transfer while maintaining the coupling stability during normal operation.
Solution Approach 2:
The patent changes the physical parameters of the coupling interface by introducing a deformable elastomeric material that can change its stiffness characteristics. During normal use, the material maintains firm coupling, but during collision, it deforms to absorb energy, thus changing the coupling parameters dynamically to resolve the contradiction.
2Stability of the object's composition
If the pull handle is firmly coupled to the door trim, then the shaking phenomenon is removed, but the structure generates sharp edges during broadside collision increasing passenger damage
Solution Approach 1:
The elastomeric cushioning member is installed in advance between rigid components to prevent sharp edge generation during collision. The material deforms under impact to round off potential sharp edges and absorb energy, thus eliminating the harmful effect before it can harm the passenger.
Solution Approach 2:
The patent combines rigid materials (for structural stability and anti-shaking) with elastomeric materials (for collision energy absorption). This composite approach allows the structure to maintain stability during normal operation while preventing sharp edge generation during collision through the elastomeric component's deformation characteristics.
Data Source
AI summary
A connecting device of a door trim and a pull handle for a vehicle includes a sliding back prevention boss which protrudes from the door trim of the vehicle and a supporting boss which protrudes from the pull handle mounted on the door trim and inserted into the sliding back prevention boss. As such, a phenomenon in which sharp edges are generated due to a broadside collision of a vehicle may be prevented and collision energy due to the collision may be decreased, thereby making it possible to improve salability and safety for a passenger.