Door Closer Self-Control Positioning Grooved Pull Rod
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Solution Overview
Problem
Mechanical door closers in prior art can only fix a door leaf position when the opening angle exceeds 90 degrees, limiting convenience and usability for door positioning at arbitrary angles.
Innovation Solution
A door closer with a self-control positioning mechanism comprising a cylindrical housing, piston component, long spring, pull rod, and a locking mechanism that allows the pull rod to be positioned at any angle through a series of grooves and a movable lock core, enabling arbitrary door leaf positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mechanical door closer uses only a spring and pull rod mechanism, then the structure is simple, but the door leaf can only be fixed when opening angle exceeds 90 degrees, reducing positioning versatility
Solution Approach 1:
The door closer is divided into two independent functional modules: the elastic mechanism (spring and pull rod) and the self-control positioning mechanism (locking mechanism with grooves). This segmentation allows each module to perform its specific function while maintaining overall structural simplicity, enabling the door to be positioned at any angle without excessive complexity
Solution Approach 2:
The pull rod is designed with a series of grooves that can engage with the locking mechanism at multiple positions, allowing the same basic mechanism to provide positioning at any angle rather than being limited to a single fixed angle or angle range, thus achieving multi-functionality
2Ease of operation
If a mechanical door closer allows free movement of the pull rod, then the operation is convenient, but the door leaf cannot maintain arbitrary positions, reducing positioning control
Solution Approach 1:
The door closer automatically locks and holds the door at the desired position without requiring manual intervention. When the door is moved to any angle, the locking mechanism automatically engages with the appropriate groove on the pull rod, providing self-service positioning and holding functionality
Solution Approach 2:
The locking mechanism acts as an intermediary between the pull rod and the door leaf, enabling the pull rod to move freely while still providing reliable positioning control through the engagement of the locking block with the grooves at specific positions
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 door leaf positioning at any angle, facilitating personnel and cargo circulation while maintaining a compact, convenient, safe, and reliable structure.
Implementation Method 1
the elastic mechanism comprises a cylindrical housing, a piston component, a long spring and a pull rod... the pull rod is sheathed in the long spring, and two end parts of the long spring respectively are in contact with a sealing lid of the piston component and the cylindrical housing
Data Source
AI summary
A door closer capable of realizing self-control positioning has a cylindrical housing, a piston, a spring and a pull rod; the piston is built in the cylindrical housing and connected and fastened with one end of the pull rod; the pull rod is sheathed in the spring, and the two end parts of the spring respectively are in contact with a sealing lid of the piston and the cylindrical housing; the door closer further has a self-control positioning mechanism having a cylindrical outer sleeve a control part and a locking part; the cylindrical outer sleeve is connected and fastened with the cylindrical housing; the control part and the locking part are linked by a clutch and joined together; the locking part and the pull rod are linked by a clutch, and the pull rod is provided with a series of grooves which can be clasped with the locking part.