Automatic Return Device for Glass Door with Buffer and Positioning
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Solution Overview
Problem
Conventional hydraulic hinges for glass doors lack a buffer mechanism to prevent impact-induced damage and do not offer positioning functionality, causing the doors to immediately return to their closed position, making them unsuitable for applications requiring ventilation or other open positions.
Innovation Solution
An automatic return device combining a hydraulic hinge assembly with a leaf positioning assembly, which includes a piston unit, drive axles, grip units, and a spring mechanism to control the opening and closing velocity of glass doors and position them at a predetermined angle, utilizing oil storage areas, guide wheels, and regulating valves to manage the door's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional hydraulic hinge is used for glass doors, then the door can be opened and closed easily, but the returning force acts fully on the doorframe causing impact-induced damage after long-term use
Solution Approach 1:
The patent introduces a buffer mechanism comprising a buffer spring and buffer limiting structure that is pre-installed in the hydraulic hinge assembly. When the glass door returns to the closed position, the buffer spring absorbs the impact force before it can be transmitted to the doorframe, and the buffer limiting structure prevents excessive compression. This beforehand cushioning resolves the contradiction by protecting the doorframe from impact damage while maintaining easy door operation.
2Ease of operation
If a conventional hydraulic hinge is used for glass doors, then the door can be opened and closed smoothly, but the door immediately returns to closed position without positioning function
Solution Approach 1:
The patent introduces a positioning mechanism with a positioning block and positioning groove that can dynamically engage at predetermined positions during door movement. The positioning block can selectively engage with positioning grooves at different angles (e.g., 45 degrees, 90 degrees) to hold the door in various open positions for ventilation or other reasons, while still allowing smooth door operation. This dynamic positioning capability resolves the contradiction by enabling the door to be held at multiple positions while maintaining operational smoothness.
3Reliability
If a buffer mechanism and positioning mechanism are added to the hydraulic hinge, then impact damage is prevented and door positioning is enabled, but the device complexity increases
Solution Approach 1:
The patent merges the buffer mechanism and positioning mechanism into a single integrated hydraulic hinge assembly that combines both functions with the existing hydraulic components. The buffer spring, buffer limiting structure, positioning block, and positioning grooves are all incorporated within the same hinge housing and work together with the hydraulic piston and cylinder. This merging resolves the contradiction by achieving reliable door protection and positioning capabilities while minimizing the increase in overall device complexity through integrated design.
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 effectively controls the opening and closing velocity of glass doors and positions them at a predetermined angle, preventing impact damage and allowing for customizable door positioning, enhancing the functionality and durability of glass door systems.
Implementation Method 1
a piston unit, having a piston seat that is received in the oil storage area in a transversely movable manner... the piston seat is guided by the guide wheel and presses oil in the oil storage area
Implementation Method 2
the piston unit abuts against the base through a spring... the spring abutting against the piston unit pushes and thereby returns the piston unit
Implementation Method 3
the guide wheel having a tooth portion for selectively engaging with the two racks, so that the piston seat is guided by the guide wheel
Implementation Method 4
the cam having a front end and two laterals connected to the front end, each of the front end and the two lateral ends having a pit for the first ball to selectively lean against one of the pits
Implementation Method 5
the second spring is set in the receiving area to abut against one end of the slide seat... the second spring pushes the first ball into one of the pits
Data Source
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AI summary
An automatic return device (1) for a glass door (A) includes a hydraulic hinge assembly (10) having a first base (12), a piston unit (13), a first drive axle (14) and a first grip unit (15) and a leaf positioning assembly (20) having a second base (22), a slide seat unit (23), a second drive axle (24), and second grip unit (25). The first and second bases (12, 22) are connected to a doorframe (2). The piston unit (13) and first drive axle (14) are set in the first base (12). The first drive axle (14) interacts with the piston unit (13) to generate oil pressure. The first and second drive axles (14, 24) are connected to the first and second grip units (15, 25) that grip the glass door (A). The slide seat unit (23) and the second drive axle (24) are set in the second base (22). When the second drive axle (24) pivots, the slide seat unit (23) positions the second drive axle (24) at a predetermined pivotal angle.