Door Handle Fitting With Rotatable Ring For Secure Installation
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Solution Overview
Problem
Existing door handle sets are complex to install due to their design, which involves mounting handles on a polygonal pin in a rotationally fixed manner, making installation cumbersome.
Innovation Solution
A door handle set comprising a handle, rosette, fastening ring, actuator, and securing element, where the fastening ring is rotatable between release and securing positions, allowing easy installation by actuating the handle to fix it to the rosette through a mechanism involving a polygonal pin and actuator engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the handle is mounted on the polygonal pin in a rotationally fixed manner, then the handle is securely fixed to the door, but the installation process becomes complex and cumbersome
Solution Approach 1:
The fastening ring is designed to be rotatable relative to the carrier ring, transitioning between a release position (during installation) and a securing position (during operation). This dynamic element allows the handle to be easily installed when in the release position, then securely fixed when rotated to the securing position, resolving the contradiction between easy installation and secure fixation.
2Reliability
If the handle set includes multiple components for secure mounting, then the handle is firmly fixed against displacement and twisting, but the number of parts and assembly steps increases
Solution Approach 1:
The fastening ring integrates multiple functions: it serves as both the mounting component and the securing mechanism. By combining the rotationally fixed handle mounting with the rotatable fastening ring that engages securing elements, the design achieves firm fixation against displacement and twisting while minimizing the number of separate components and assembly steps.
Data Source
Figure 1
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Figure 4~6
AI summary
The invention relates to a door handle set, comprising a handle (4) and a rosette (14, 46), characterized by a fastening ring (20, 48), an actuator (22, 70), and at least one securing element, in particular a securing ball (28) or a securing pin. The rosette (14, 46) comprises a carrier ring with at least one recess (32) in which the securing element is mounted so as to be movable in the radial direction. The fastening ring (20, 48) is mounted on the carrier ring so as to be rotatable between a release position and a securing position and has at least one notch (30) on the side facing the carrier ring. In the release position, the notch (30) is aligned in the radial direction with the recess (32) and in the securing position is spaced from the recess (32) such that the securing element fixes the handle (4) to the fastening ring (20, 48).The actuator (22, 70) is rotatable by actuating the handle (4) and has at least one engagement element (38) which is engaged and/or can be brought into engagement with a counter-engagement element (36) of the fastening ring (20, 48) in such a way that the fastening ring (20, 48) can be rotated from the release position into the securing position by rotating the actuator (22, 70).