Door Closer Arrangement with Movable Rail and Auxiliary Spring
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Solution Overview
Problem
Existing door closer arrangements require substantial force to open doors initially and may not provide sufficient closing power in all situations due to the spring tension mechanism.
Innovation Solution
A door closer arrangement featuring a slide rail, carriage, and auxiliary spring arrangement with a harvesting spring and transmission mechanism, along with low-friction bearings and a safety switch, which aids in easier door opening and improved closing by redistributing energy and adjusting the door closer's position along a second rail with a slide slope.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring mechanism is used to close the door automatically, then the closing function is improved, but the force required to open the door becomes too large
Solution Approach 1:
The patent applies dynamics by making the door closer position movable along a rail instead of fixed. The door closer can dynamically adjust its position between a first position (near hinge) and second position (near lock), allowing the system to adapt the closing force characteristics during door operation. This resolves the contradiction by enabling the spring mechanism to maintain automatic closing while reducing initial opening force through optimal position adjustment.
Solution Approach 2:
The patent changes the parameter of door closer position along the rail. By allowing the door closer to move between different positions on the rail, the effective leverage and spring tension characteristics are modified. This parameter change enables the system to reduce the force required to overcome spring tension during door opening while maintaining reliable automatic closing functionality.
2Force
If the door closer is positioned near the hinge side, then the opening force is reduced, but the closing power becomes insufficient
Solution Approach 1:
The patent implements dynamics by enabling the door closer to move between a first position (near hinge) and second position (near lock) along the rail. When near the hinge, opening force is reduced; when near the lock, closing power is enhanced. This dynamic repositioning resolves the contradiction between reducing opening force and maintaining sufficient closing power.
Solution Approach 2:
The patent applies preliminary action through the auxiliary motion arrangement that automatically moves the door closer to the optimal position before the door closing operation. The auxiliary spring arrangement pre-positions the door closer near the lock side before closing, ensuring sufficient closing power is available when needed, without requiring the user to manually adjust the position.
3Device complexity
If a fixed door closer position is used, then the structure is simple, but the force characteristics cannot be optimized for different door positions
Solution Approach 1:
The patent transitions from a fixed door closer structure to a dynamic structure where the door closer can move along a rail. While this increases structural complexity, it enables optimization of force characteristics for different door positions, significantly improving door opening smoothness and user experience.
Solution Approach 2:
The patent introduces a rail as an intermediary element that enables the door closer to move between different positions. This simple intermediary structure allows the door closer to access multiple positions along the rail, optimizing force characteristics without requiring complex adjustment mechanisms.
4Power
If the carriage moves along the second rail during door operation, then the closing power is improved, but friction losses increase
Solution Approach 1:
The patent incorporates low-friction bearings in the carriage that move along the second rail. These bearings reduce friction losses during the carriage movement, enabling the system to maintain improved closing power while minimizing energy loss to friction.
Solution Approach 2:
The patent changes the friction parameter by introducing low-friction bearings in the carriage. This allows the carriage to move smoothly along the second rail with minimal friction, enabling the door closer to reach optimal positions for enhanced closing power without significant energy loss.
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
Reduces the initial opening force and enhances closing power by utilizing the auxiliary spring arrangement to assist the door closer's movement along the second rail, ensuring smoother operation and efficient door closure.
Implementation Method 1
The auxiliary spring arrangement further comprises an harvesting spring attached on the second rail and a transmission mechanism between the harvesting spring and the carrier in order to tension the harvesting spring when the carrier and the harvesting arm move towards the first end of the second rail, and also to release energy of the harvesting spring when the carrier and the harvesting arm move away from the first end of the second rail
Implementation Method 2
The door closer arrangement further comprises a first low-friction arrangement between the second rail and the carriage, and a second low-friction arrangement between the arm and the slide rail
Data Source
Figure 1~3
Figure 4~5
Figure 6~7
AI summary
The aim of the invention is to achieve a door closer arrangement (1) where the force needed for opening the door (2) is not so substantial. The invention comprises a door closer (6), a slide rail (7), and an arm (8) that connects the door closer with the slide rail. The arrangement comprises also a second rail (9), which is arranged to form a slide slope for the door closer (6) and the auxiliary spring arrangement