Cabinet Door Ejection Piston and Tension Rod Mechanism
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Solution Overview
Problem
Existing devices for opening cabinet doors with ejection mechanisms are not user-friendly and often cause the door to self-close prematurely.
Innovation Solution
A device comprising an ejection piston with a compression spring and a tension rod, coupled via a control device that allows the piston and rod to retract into the cabinet body when the door is tapped, enabling easy manual opening and preventing self-closing, with a damping unit to mitigate impact and a locking mechanism for secure operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an ejection device is used to open the cabinet door, then the door can be opened automatically, but the device complexity increases
Solution Approach 1:
The ejection device is divided into two independent systems: an ejection piston with compression spring for initial door separation, and a tension rod with tension spring for maintaining door opening. This segmentation allows each component to perform its specific function independently, simplifying the overall control mechanism while maintaining automatic opening capability.
Solution Approach 2:
The device uses dynamic coupling through a control device that engages only when the ejection piston is drawn into the cabinet body. This dynamic interaction allows the system to transition from a simple ejection mechanism to a coordinated two-stage system, enabling automatic door opening without requiring complex continuous control.
2Reliability
If the ejection piston and tension rod are always coupled, then the door opening force is maintained, but the door may self-close prematurely
Solution Approach 1:
The control device creates a dynamic coupling between the ejection piston and tension rod that activates only when the ejection piston is drawn into the cabinet body. This dynamic engagement ensures the door opening force is applied at the appropriate moment while preventing premature self-closing, as the systems work independently until the triggering condition is met.
Solution Approach 2:
The control device acts as a feedback mechanism that monitors the position of the ejection piston and only couples the tension rod to the door when the piston is retracted. This feedback-based control ensures the door remains reliably open without premature self-closing, as the coupling state automatically adjusts based on the ejection piston's position.
3Reliability
If the tie rod is permanently connected to the cabinet door, then the door opening force is maintained, but the installation becomes more difficult
Solution Approach 1:
The connection between the tie rod and cabinet door is made dynamic through the control device, which allows the tie rod to be coupled to the door only when needed (when the ejection piston is retracted). This dynamic connection maintains reliable door opening force while significantly simplifying installation, as the tie rod does not require permanent attachment to the door 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
The solution provides a user-friendly and efficient mechanism for opening cabinet doors, preventing self-closing and allowing for easy installation, while also being adaptable for use with drawers and other movable furniture parts.
Implementation Method 1
an ejection piston (21) with a compression spring (23)
Implementation Method 2
a tension rod (25) with a tension spring (26)
Implementation Method 3
a damping unit (30), in particular a spring-loaded damper (31), which decelerates or stops the cabinet door (11)
Data Source
Figure 1
Figure 2~4
Figure 5
AI summary
The invention relates to a device for opening the cabinet door of a cabinet body, wherein the cabinet door (11) is attached to the cabinet body (10) by means of self-closing hinges (12), wherein the cabinet door (11) is held in the closed position at a small distance (x) from the front side of the cabinet body (10). In order to allow the cabinet door to be opened without gripping elements, without hindering the self-closing of the hinges, the invention provides for a unit (20) having an ejection piston (21) having a locking apparatus (24) and for a tension rod (25) in the cabinet body (10), wherein the ejection piston (21) is supported in the unit (20) by means of a compression spring (23) and the tension rod (25) is supported in the unit by means of a tension spring (26). The ejection piston (21) and the tension rod (25) are coupled to each other by means of a control apparatus (27) having a freewheel, and thus by tapping (a) on the cabinet door the opening of the cabinet door (11) can be initiated and the cabinet door can be brought into an intermediate position. In the intermediate position, the cabinet door (11) can be grasped by a hand and opened further. The invention further relates to an additional embodiment of the device having the same functions.