Door Closer Using Flexible Element and Braking Device
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Solution Overview
Problem
Conventional door closers are complex, unreliable, difficult to install, and often use oil, which raises concerns about fire safety, sustainability, and require complicated adjustments.
Innovation Solution
A flexible elongated element-based arrangement with a braking device that allows for tensioning to control door movement, eliminating the need for hydraulic systems and enabling easy installation and compact design, with optional electromagnetic generators for energy harvesting and smart control systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional door closers use hydraulic cylinders containing oil, then damping force can be provided proportional to door speed, but fire safety is compromised and leakage occurs
Solution Approach 1:
The patent replaces the hydraulic mechanical system with an electromagnetic system. The door closer uses an electromagnetic motor to provide controlled closing force and a separate electromagnetic braking device to control door speed, eliminating the need for oil-based hydraulic cylinders and associated fire safety and leakage problems.
Solution Approach 2:
The patent extracts and removes the harmful hydraulic oil system from the door closer design. By separating the damping function into a distinct electromagnetic braking device, the design eliminates the oil containment issues while maintaining the speed control function.
2Ease of operation
If conventional door closers use complex cam profiles to control closing force, then closing force control is achieved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical cam profiles with electromagnetic control systems. The closing force is controlled through an electromagnetic motor that can be programmed to deliver precise force profiles, and the braking device provides electronic speed control, eliminating the need for complex mechanical cam mechanisms.
Solution Approach 2:
The patent introduces dynamic control through electromagnetic systems that can adjust closing force and speed in real-time based on programmed parameters, replacing static mechanical cam profiles with adaptable electronic control that simplifies the mechanical structure.
3Measurement precision
If conventional door closers are designed with complicated adjustments, then precise control is achieved, but ease of installation deteriorates
Solution Approach 1:
The patent incorporates self-adjusting electromagnetic control systems that automatically calibrate and optimize door closing parameters during initial operation. The electronic control system can self-diagnose and adjust parameters without requiring complex manual adjustments, making installation simpler while maintaining precise control.
Solution Approach 2:
The patent uses feedback mechanisms where sensors monitor door position, speed, and force, and the electronic control system continuously adjusts parameters to achieve optimal performance. This automated feedback loop eliminates the need for complex manual adjustment procedures during installation while maintaining high precision control.
4Adaptability or versatility
If conventional door closers use temperature-sensitive materials, then environmental adaptation is achieved, but reliability deteriorates due to temperature changes
Solution Approach 1:
The patent replaces temperature-sensitive mechanical components with electromagnetic systems that are less sensitive to temperature variations. The electromagnetic motor and braking device maintain consistent performance across a wider temperature range, and the electronic control system can compensate for environmental conditions through software algorithms.
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 solution provides a reliable, cost-effective, and compact door closer system that is easy to install and operate, eliminating the drawbacks of conventional door closers by using a flexible elongated element and braking device, and enabling efficient energy harvesting and smart control.
Implementation Method 1
a flexible elongated element configured to be tensioned to thereby force the base section and the fixation part to move towards each other in a relative closing movement
Implementation Method 2
a braking device arranged to brake a speed of the relative closing movement
Data Source
AI summary
An arrangement (16) for controlling movements of an access member (12) relative to a frame (14), the arrangement (16) comprising abase section (18) for connection to either the access member (12) or the frame (14); a fixation part (20) for connection to the other of the access member (12) and the frame (14); a flexible elongated element (22) configured to be tensioned to thereby force the base section (18) and the fixation part (20) to move towards each other in a relative closing movement (86); and a braking device (82) arranged to brake a speed of the relative closing movement (86).