Plastic Closure Device with Resilient Tongue for Vehicle Paint Protection

The patent changes the material parameter from metallic to plastic, specifically using a thermoplastic material that can be molded into a resilient tongue. This material parameter change eliminates the harmful mechanical damage caused by metallic parts while maintaining the closure function through the elastic deformation capabilities of the plastic tongue.

The closure device uses a composite structure combining plastic material with specific geometric features (resilient tongue, arch connection, limit stop element). The plastic body provides corrosion resistance and paint compatibility, while the geometric configuration ensures effective closure function without requiring metallic reinforcing elements.

The patent introduces an intermediary arch connection structure between the resilient tongue and the device body. This arch acts as a mediator that distributes and absorbs the stresses and deformations, preventing direct transmission of mechanical stress to the paint surface and eliminating paint flaking while maintaining closure function.

The arch connection structure is designed beforehand to cushion and absorb the stresses that will occur during tongue deformation. The geometric configuration of the arch pre-positioned stress absorption mechanisms that activate during operation, preventing paint damage before it can occur.

The patent extracts and eliminates the fixing members (screws, bolts, or other fasteners) from the closure device system. The device achieves secure fixing through its own structural features - the resilient tongue engaging with the housing rim and the arch connection providing mechanical stability - without requiring separate fastening elements, thereby simplifying installation and removal operations.

The closure device is designed to be self-fixing through its inherent structural features. The resilient tongue automatically engages with the housing rim, and the arch connection provides self-stabilizing mechanical support. The device serves its own fixing function without requiring external fastening operations, enabling rapid installation and removal.

The patent uses a composite design combining plastic material with specific geometric features (resilient tongue, arch connection, limit stop element). The plastic material provides the necessary elasticity to withstand closure stresses, while the geometric configuration distributes these stresses throughout the structure, enabling simple installation without requiring complex fixing mechanisms.

The closure device incorporates dynamic elements - the resilient tongue that can deform elastically during closure and the arch connection that allows controlled movement. These dynamic features enable the device to absorb closure stresses through controlled deformation while maintaining ease of installation and removal through the same flexibility.