Plastic Subframe for Door Closer Housing Installation
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Solution Overview
Problem
Metallic open-ended door closer housings with separate plastic end pieces are cumbersome to install due to imprecise tolerances and high manufacturing costs, as they require precise production and fitting, leading to loose corners and increased complexity.
Innovation Solution
A plastic subframe with end pieces fits into the metal frame, featuring easy installation fastening elements for the subframe and metal housing, reducing complexity and manufacturing costs, and allowing on-site or factory assembly similar to plastic housings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate plastic end pieces are used to cover the open ends of a metal housing, then the housing can be adapted to different installation requirements, but the installation becomes cumbersome and the manufacturing costs increase
Solution Approach 1:
The patent combines the previously separate end pieces and subframe into a single integrated plastic subframe component. This subframe includes integrated end pieces that fit into the open ends of the metal housing, eliminating the need for separate assembly steps and reducing installation complexity while maintaining adaptability.
Solution Approach 2:
The plastic subframe acts as an intermediary component between the metal housing and the door closer body. It provides a simplified interface that absorbs tolerance variations and simplifies the connection process, making installation easier while maintaining adaptability to different mounting requirements.
2Adaptability or versatility
If separate plastic end pieces are used to cover the open ends of a metal housing, then the housing can be adapted to different installation requirements, but the manufacturing costs become high due to the need for precise production
Solution Approach 1:
The patent combines the previously separate end pieces and subframe into a single integrated plastic subframe component. This subframe includes integrated end pieces that fit into the open ends of the metal housing, eliminating the need for separate assembly steps and reducing installation complexity while maintaining adaptability.
Solution Approach 2:
The patent changes the material parameter from metal to plastic for the subframe and end pieces. Plastic material allows for easier and less costly manufacturing with standard tolerances, reducing the need for expensive precision machining while maintaining the required adaptability for different installation scenarios.
3Adaptability or versatility
If separate plastic end pieces are used to cover the open ends of a metal housing, then the housing can be adapted to different installation requirements, but loose corners remain and the parts do not fit neatly
Solution Approach 1:
The plastic subframe acts as an intermediary component between the metal housing and the door closer body. It provides a simplified interface that absorbs tolerance variations and simplifies the connection process, making installation easier while maintaining adaptability to different mounting requirements.
Solution Approach 2:
The patent changes the material parameter from metal to plastic for the subframe and end pieces. Plastic material allows for easier and less costly manufacturing with standard tolerances, reducing the need for expensive precision machining while maintaining the required adaptability for different installation scenarios.
Data Source
Figure 1~3
Figure 4
AI summary
The invention relates to a door closer housing. The invention comprises a plastic subframe (3) arranged for fitting into the inside of a separate metal housing (2). The subframe comprises end pieces (4) that fit into the ends of the metal housing. The subframe comprising the end pieces is easy to install.