Vehicle Hemming Structure for Secure Removable Trim
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Solution Overview
Problem
Existing automotive decorative members are difficult to disassemble and replace, leading to poor anti-theft performance.
Innovation Solution
An encapsulation structure featuring a main body with an engaging cavity and a first assembling hole, a decorative member with a buckle and limiting protrusion, and an active member that moves relative to the main body to switch the buckle between states, allowing for easy assembly and disassembly while maintaining anti-theft properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If decorative members are installed with difficult-to-disassemble structures, then anti-theft performance is improved, but ease of operation deteriorates
Solution Approach 1:
The connection mechanism is segmented into two distinct states: a locked state where the limiting protrusion abuts against the inner wall of the engaging cavity to prevent removal, and an unlocked state where the buckle is squeezed to allow the protrusion to pass through the first assembling hole. This segmentation allows the same structure to provide both strong anti-theft protection and controlled ease of operation.
Solution Approach 2:
The connection structure transitions from a static fixed state to a dynamic adjustable state through the buckle mechanism. The buckle can be squeezed to change the position of the limiting protrusion, enabling dynamic switching between secured and removable states. This dynamic capability resolves the contradiction by allowing the structure to adapt between providing strong security and enabling easy operation when needed.
2Ease of operation
If decorative members are made easily disassemblable, then ease of operation is improved, but anti-theft performance deteriorates
Solution Approach 1:
The buckle is pre-configured in a recovered state where the limiting protrusion automatically engages with the inner wall of the engaging cavity upon insertion through the first assembling hole. This preliminary engagement action ensures anti-theft protection is established automatically during the assembly process, so that ease of operation does not compromise security. The protrusion's automatic engagement prevents unintended removal while still allowing controlled disassembly.
3Ease of operation
If direct disassembly from the decorative member side is allowed, then ease of operation is improved, but anti-theft performance deteriorates
Solution Approach 1:
The active member acts as an intermediary tool that must be used to disassemble the connection. It is movably matched with the main body and extends into the engaging cavity to press the buckle, forcing it from the recovered state to the squeezed state. This intermediary mechanism ensures that disassembly cannot be performed directly from the decorative member side, maintaining anti-theft protection while still enabling controlled operation when the proper tool is used.
Solution Approach 2:
Instead of allowing direct disassembly from the decorative member side, the design inverts the operation by requiring action from the main body side through the active member. The active member presses the buckle from within the engaging cavity, forcing the buckle to release and allowing the limiting protrusion to pass through the first assembling hole. This inversion prevents direct removal while enabling controlled disassembly.
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 encapsulation structure enables easy disassembly and assembly of decorative members while enhancing anti-theft performance by preventing direct disassembly from the decorative member side.
Implementation Method 1
the buckle has a squeezed state and a recovered state, when the buckle is squeezed to enable the buckle to switch from the recovered state to the squeezed state
Implementation Method 2
the active member is capable of moving relative to the main body and presses the buckle, so that the buckle switches from the recovered state to the squeezed state
Data Source
AI summary
A hemming structure includes a main body, an accessory piece and a movable piece. The main body is internally provided with a clamping cavity. The main body is provided with a first assembling hole in communication with the clamping cavity. The accessory piece is provided with a fastener. The outer side of the fastener is provided with a limiting protrusion. When the fastener is being pressed, the limiting protrusion can pass through the first assembling hole. When the limiting protrusion enters the clamping cavity from the first assembling hole, the fastener changes from a pressed state to a recovered state.