Sliding Door Hinge Structure for Gap-Free Appliance Doors
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Solution Overview
Problem
Conventional door hinges in electric home appliances require a gap between the door and the door frame for operation, leading to design and sanitary issues such as dust and insect entry.
Innovation Solution
A door hinge design where the actuation frame is forwardly drawn at a predetermined distance when opened, utilizing a slider, rotatable moving guide plate, guide roller, and connection frame to maintain contact and prevent gaps, with a cover frame for easy detachment and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a gap is formed between the door and door frame for door operation, then the door can be opened and closed, but dust and insects enter through the gap causing sanitary issues
Solution Approach 1:
The door hinge system is divided into multiple functional components: a fixed frame, a movable frame with guide plate, and a cover frame. This segmentation allows the movable frame to slide forward during door opening, creating a dynamic sealing mechanism that maintains contact with the door frame while enabling smooth door operation without gaps
Solution Approach 2:
The cover frame is detachably coupled to the movable frame, forming a nested structure. This nesting allows the cover frame to follow the movable frame's forward motion during door opening, maintaining the sealed configuration and preventing dust and insect entry while preserving ease of operation
2Object-affected harmful factors
If the actuation frame is forwardly drawn during door opening, then no gap is formed between door and door frame, but the hinge mechanism becomes more complex
Solution Approach 1:
A guide pin inserted into a slant guide hole acts as an intermediary mechanism between the slider and the fixing member. This simple geometric constraint automatically converts rotational door motion into forward sliding motion of the actuation frame, achieving gap prevention without requiring complex actuation mechanisms
Solution Approach 2:
The hinge mechanism transitions from a static configuration to a dynamic one during door opening. The slider and connection frame are forwardly pushed out as the door opens, dynamically adjusting the actuation frame's position to maintain contact with the door frame throughout the opening sequence, preventing gap formation adaptively
3Ease of repair
If the cover frame is detachably coupled to the movable frame, then maintenance becomes easier, but the device complexity increases
Solution Approach 1:
The cover frame is separated as a detachable component from the movable frame through a coupling mechanism. This segmentation allows the cover frame to be easily removed for maintenance or replacement without disassembling the entire hinge mechanism, improving ease of repair while adding only minimal coupling structure complexity
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 smooth opening and closing of doors without forming a gap between the door and door frame, enhancing sanitation and appearance by preventing dust and insect entry while allowing for easy maintenance.
Implementation Method 1
a guide roller configured to resiliently support the rotatable movement of the rotatable moving guide plate by tensile force of a spring
Data Source
AI summary
A door hinge includes a fixing member (10) fixed to a door frame (100), an actuation frame (20) fixed to a door (200) to enable the door to be opened and closed, a slider (22) coupled between the actuation frame and the fixing member, a rotatable moving guide plate (30) rotatably moved around the hinge (34) when the door is opened, and configured to forwardly push the slider, a guide roller (18) to resiliently support the rotatable movement of the rotatable moving guide plate, and a connection frame (60) having one end connected to a slot (11) of the fixing member by a pin (62) and the other end connected to the actuation frame by the hinge (24) and forwardly pushed out when the door is opened along with the slider.