Door Closer Piston Oil Sealing Ring Hold Position
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Solution Overview
Problem
Conventional door closers require a blocker to hold doors open, which is inconvenient to remove when closing the door.
Innovation Solution
A door closer with a piston and oil sealing ring that divides the piston accommodating chamber into oil storage and opening spaces, using communicating holes to control oil flow and hold the door in a predetermined position when open.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a blocker is provided to hold the door open, then the door can be held in a predetermined position, but it is inconvenient to remove the blocker for closing the door
Solution Approach 1:
The door closer system performs the holding function automatically through the piston blocking the first communicating hole at a predetermined door opening angle, eliminating the need for manual intervention to install or remove a blocker. The system serves itself by using the door's own movement to trigger the holding mechanism.
Solution Approach 2:
The piston's position dynamically changes with door opening angle, automatically blocking the communicating hole when the door reaches the predetermined angle. This dynamic mechanism replaces the static blocker, allowing seamless transition between holding and closing modes without manual intervention.
2Reliability
If a blocker is used to hold the door open, then the door can remain open, but an additional component is required which increases device complexity
Solution Approach 1:
The piston in the door closer performs multiple functions: it controls oil flow during door closing and simultaneously serves as a blocker to hold the door open at the predetermined angle. By making the piston multi-functional, the invention eliminates the need for a separate blocker component, reducing overall device complexity.
Solution Approach 2:
The invention merges the holding function with the existing piston component of the door closer. The piston's dual role combines the closing mechanism and holding mechanism into a single integrated system, eliminating redundant components and simplifying the overall device structure.
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 the door to be held securely in a predetermined open position without the need for a blocker, allowing for easy closure by controlling oil flow and using an oil sealing ring to block the communicating hole.
Implementation Method 1
The piston is installed in the piston accommodating chamber to divide the piston accommodating chamber into a first oil storage space and a first opening space. The channel connecting module communicates with the first opening space by the first communicating hole and communicates with the first oil storage space by the second communicating hole.
Implementation Method 2
The oil sealing ring is coupled to and moved together with the main body in the piston accommodating chamber. The oil sealing ring is adapted to block the first communicating hole for holding the door in a predetermined position when the door is open.
Data Source
AI summary
A door closer pivoted on a door at least includes a case and a piston. When the door is open, the door closer blocks a communicating hole of the case by an oil sealing ring of the piston to allow an oil filled in the door closer cannot flow through the communicating hole. As a result, the open door can be held in a predetermined position.