Handleless Cabinet Door Opening With Self-Closing Hinges
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Solution Overview
Problem
Conventional cabinet door opening devices require handles or handle fittings and hinder the self-retraction mechanism of hinges, making it difficult to open the door without manual assistance.
Innovation Solution
A device comprising an ejection piston with a compression spring and a tension rod with an extension spring, coupled via a control device, allows the cabinet door to be opened by tapping, eliminating the need for handles and maintaining unhindered self-retraction of hinges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If self-retracting hinges are used to mount the cabinet door, then secure closure and automatic retraction are achieved, but handle elements are required to open the door
Solution Approach 1:
The ejection piston and tension rod are pre-loaded in a retracted position within the cabinet body, ready to automatically eject upon door closure, eliminating the need for manual handle operation to initiate the opening sequence
2Ease of operation
If handle elements are added to the cabinet door for opening, then door opening becomes easier, but the self-retraction function of hinges is hindered
Solution Approach 1:
The opening function is extracted from the door handle elements and transferred to an independent ejection mechanism (piston and tension rod) mounted in the cabinet body, allowing the door to open automatically without compromising hinge self-retraction
Solution Approach 2:
The ejection piston and tension rod act as intermediary elements between the cabinet body and door, providing the opening force without requiring direct interaction with the door's hinge mechanism, thus preserving self-retraction functionality
3Shape
If the cabinet door is mounted flush with the cabinet body front, then aesthetics are improved, but the door cannot be opened without handles
Solution Approach 1:
The opening mechanism transitions from a lateral door-handle interaction to a depth-based ejection motion, where the piston and rod move along the axis perpendicular to the cabinet front, enabling flush mounting while maintaining operability
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 cabinet door to be opened sufficiently for grasping and further manual opening without handles, while automatically returning to closed positions, ensuring the self-retracting hinge function remains unobstructed.
Implementation Method 1
an ejection piston (21), having a compression spring (23) and a locking unit (24)
Implementation Method 2
a tension rod (25), having an extension spring (26)
Data Source
AI summary
Device for opening cabinet door of cabinet body. Cabinet door is attached to cabinet body by self-closing hinges. Cabinet door is held in closed position at a small distance from the front of cabinet body. In order to allow cabinet door to be opened without gripping elements, without hindering the self-closing of the hinges, there is a unit having ejection piston with a locking apparatus and tension rod in cabinet body. Ejection piston is supported in the unit by compression spring, and tension rod is supported in the unit by tension spring. Ejection piston and tension rod are coupled to each other by a control apparatus having a freewheel, and thus by tapping on cabinet door the opening of cabinet door can be initiated and cabinet door can be brought into an intermediate position. In the intermediate position, cabinet door can be grasped by a hand and opened further.