Door Fitting Cover Cap with Rotating Latch Mechanism
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Solution Overview
Problem
Existing door and window fittings have complex structures requiring special tools for assembly and disassembly, and cover caps often need to be made of elastic materials for proper fitting, making the process cumbersome.
Innovation Solution
A simplified door or window fitting design where the latching element is prestressed to automatically snap into place when the cover cap is rotated, allowing for quick assembly and disassembly without axial displacement, and featuring a push button and spring mechanism for secure locking and easy unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the latching element is made rigid and fixed to the mounting base, then the structural strength is improved, but the ease of operation deteriorates because the cap cannot be easily rotated into position
Solution Approach 1:
The latching element is made movable rather than fixed, allowing it to be pushed into the access hole to enable cap rotation, then spring-loaded to automatically snap into place when the cap is turned, providing both ease of operation and secure locking
Solution Approach 2:
The spring-loaded latching element automatically snaps into the access hole when the cap is rotated into position, providing self-securing functionality without requiring additional tools or manual intervention beyond the initial rotation
2Ease of manufacture
If the cap is made of elastic material to allow clipping, then the ease of manufacture is improved, but the device complexity increases due to material and structural requirements
Solution Approach 1:
The elastic material requirement is extracted from the cap design entirely. Instead of making the cap elastic, the invention uses a rigid cap that clips onto a movable latching element, eliminating the need for elastic materials while maintaining clipping functionality
Solution Approach 2:
The design uses simple, rigid components that can be easily manufactured and replaced if needed, rather than requiring complex elastic materials with specific properties
3Device complexity
If the cap must be moved axially on the neck for assembly, then the ease of operation deteriorates, but the device complexity is reduced compared to fixed positioning systems
Solution Approach 1:
The latching element is pre-positioned on the mounting base, and the cap is designed to be rotated directly into its final position without requiring axial movement or preliminary positioning steps
Solution Approach 2:
The axial movement function is extracted from the assembly process. Instead of moving the cap axially along the neck, the invention allows the cap to be rotated directly into position, eliminating the axial displacement step
4Reliability
If a special tool is required for assembly and disassembly, then the reliability of the connection is improved, but the ease of operation and productivity deteriorate
Solution Approach 1:
The fitting can be assembled and disassembled by hand without special tools. The push button mechanism allows the latching element to be easily moved, and the spring-loaded design provides automatic securing, enabling quick tool-free operation while maintaining reliable connection
Solution Approach 2:
The special tool requirement is replaced with a simple push button mechanism that can be operated by hand, substituting a complex tool-based mechanical system with a simpler manual operation system
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
Enables quick and easy assembly and disassembly of the fitting with a compact, cost-effective design that prevents dirt entry and provides a visually appealing appearance.
Implementation Method 1
the latching element can be moved and is prestressed in the direction of the covering cap
Implementation Method 2
the anti-rotation means consists of a push button and a spring supported on the mounting base
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
The fitting has an anti-rotation unit (31) comprising a latch element (41), which is pre-stressed and moved in a direction of a protective cap (19). An access hole (29) is provided in the cap. The hole has same distance as screw holes (15, 16) from a middle axis of the cap and has the latch element, so that the hole faces the screw hole in a determined rotary position of the cap. The access hole faces the latch element in another rotary position, so that the latch element is extended in the latter rotary position in the hole. The cap covers a mounting socket (9).