Door handle
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Solution Overview
Problem
Conventional door handles for ovens cause user inconvenience and safety risks as they require users to bend their wrists and can trap fingers between the door and handle during opening, leading to potential accidents.
Innovation Solution
A door handle design featuring a rotating mechanism with first and second actuating rods, a rotating member, and a damper that allows the handle to tilt upward when opening the door, preventing finger trapping and slowly returns to its initial state through a spring tension, ensuring safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the door handle is fixed to the door and moves downward with the door during opening, then the door handle remains stationary relative to the door, but the user's wrist must bend excessively causing inconvenience
Solution Approach 1:
The door handle is transformed from a fixed structure to a dynamic one through the addition of a rotating member that allows the handle to tilt upward during door opening. The connection member with actuating rods and pins enables the handle to change its angle relative to the door, adapting to the door's movement while maintaining ergonomic operation.
2Stability of the object's composition
If the door handle moves downward with the door during opening, then the handle maintains its position on the door, but fingers may be trapped between the door and handle causing safety accidents
Solution Approach 1:
The rotating member is designed to tilt upward automatically at the beginning of the door opening operation, before the door fully opens. This preliminary upward movement creates clearance between the handle and the door edge, preventing fingers from being trapped in the gap that would otherwise form during door opening.
3Object-affected harmful factors
If a rotating mechanism with actuating rods and pins is added to allow the door handle to tilt upward, then finger trapping is prevented, but the device complexity increases
Solution Approach 1:
The door handle system is segmented into distinct functional components: a connection member with first and second actuating rods, a rotating member with pins, and a damper. This segmentation allows each component to perform its specific function (movement control, rotation enablement, damping) independently, making the complex mechanism more manageable and easier to manufacture.
Solution Approach 2:
The connection member features an asymmetric design with a first actuating rod connected to the door hinge and a second actuating rod connected to the rotating member at an offset position. This asymmetric arrangement creates the necessary mechanical advantage to produce the upward tilting motion of the handle during door opening, achieving the safety function through geometric design rather than complex actuation mechanisms.
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 door handle design prevents finger trapping and reduces wrist strain by tilting upward during door opening and slowly returning to its initial state, enhancing user safety and convenience.
Implementation Method 1
a door handle that tilts upward when a door is initially open, and after the tilting operation has been completed, that is slowly returned to an initial state thereof through the resistance of a damper
Data Source
AI summary
The present invention relates to a door handle that tilts upward when a door is open initially, and after the tilting has been completed, is slowly returned to an initial state thereof through the resistance of a damper, so that even if a user's fingers are caught in a space between the door handle and the door, the door handle can protect the user's fingers from safety accidents. According to the present invention, the door handle is located on an upper end of a front surface of a door for opening and closing a body so as to open and close a cooking compartment formed inside the body at the time when the door pulls and rotates around door hinges, and the door handle includes a first actuating rod disposed in a vertically erected state on each of both sides of the door and having an end connected to the corresponding door hinge in such a manner as to be movable upward and downward, a second actuating rod disposed above the first actuating rod and coupled to a front end of the first actuating rod by means of a pin, a rotating member having an end coupled to the door handle and a front end coupled to the second actuating rod by means of a pin, and a hinge pin having both ends coupled to a door bracket fixed to the door after passing through the front end of the rotating member, wherein the second actuating rod has an elongated hole formed on a lower end thereof so as to allow the pin for connecting the first actuating rod and the second actuating rod to be fitted thereto in such a manner as to be movable upward and downward.