Slide Hinge Screwless Attachment for Honeycomb Cardboard Doors
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Solution Overview
Problem
Conventional slide hinges fail to securely attach to doors made of honeycomb cardboard, as attaching screws do not work effectively, leading to a risk of the coupling case escaping during usage.
Innovation Solution
A slide hinge design featuring a coupling case with attaching means that include a locking plate with protruding craw portions, an operating plate with pressurizing portions, and a cap, allowing for secure attachment without screws by expanding the craw portions to fit into the door's connecting holes, using a wrench to rotate the operating plate and control the expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If attaching screws are used to fix the coupling case onto the door, then the fixation is secure on traditional wooden doors, but the attaching screws do not work well on honeycomb cardboard doors, causing the coupling case to escape
Solution Approach 1:
The invention changes the attachment mechanism from screw-based (requiring threading into wood) to expansion-based (requiring only holes). The expanding portion changes the physical state of the attachment from inserted to expanded, creating friction and mechanical interlocking with the honeycomb structure, thereby adapting to materials where screws fail.
Solution Approach 2:
The expanding portion acts as an intermediary element between the coupling case and the door. Instead of directly using screws that fail on honeycomb cardboard, the expanding portion serves as a mediator that translates rotational motion into radial expansion, creating a reliable mechanical connection suitable for both traditional and honeycomb doors.
2Ease of operation
If the coupling case is made detachable for easy installation and removal, then ease of operation is improved, but the risk of escape during usage increases
Solution Approach 1:
The attachment mechanism transitions from a static screwed connection to a dynamic expandable connection. The expanding portion can be rotated to expand and contract, allowing easy installation and removal when needed, while automatically locking into place during normal usage to prevent escape. This dynamic behavior resolves the contradiction between ease of operation and reliability.
Solution Approach 2:
The expanding portion performs the locking function automatically through its expansion action. When the operating plate is rotated, the expanding portion radially expands to engage with the door holes, self-locking the coupling case in place without requiring additional fastening operations. This self-locking mechanism ensures reliability while maintaining ease of operation through simple rotational control.
3Device complexity
If a simple attaching structure is used, then device complexity is reduced, but the ability to prevent escape on honeycomb cardboard doors is insufficient
Solution Approach 1:
The attachment structure is segmented into distinct functional components: the coupling case, the expanding portion, and the operating plate. This segmentation allows each component to perform its specific function efficiently - the expanding portion handles the locking action while the operating plate provides controlled rotation. This modular segmentation achieves reliable escape prevention without excessive overall complexity.
Solution Approach 2:
The expanding portion is nested within the coupling case structure, and the operating plate is nested within the expanding portion. This nested arrangement allows the locking mechanism to be integrated into the existing coupling case design without adding significant external complexity. The compact nested structure achieves reliable attachment while minimizing the increase in device 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
The design ensures a firm fixation of the coupling case to the door, preventing escape and providing a stable, secure attachment mechanism even on honeycomb cardboard doors.
Implementation Method 1
a diameter expanding means pushing out the craw portions of the locking plate, so that the craw portions protrude outward
Implementation Method 2
an operating plate having a plurality of pressurizing portions rotatably housed in the locking plate and protruding from an outer circumference of the operating plate
Data Source
AI summary
To provide a slide hinge which can be easily attached to a door or a cabinet main body of honeycomb cardboard, on which attaching screws do not work well, and which is further devised to eliminate a risk of escape from the door after the fixation, fittings enabling a coupling case to be attached to the door even without attaching screws or nails are provided; furthermore, each of the fittings comprises an attaching case part integrally connected to each side portion of the coupling case, and an fitting for each attaching case part; then, this fitting comprises a locking plate housed into the attaching case part and a diameter expanding means pushing out craw portions of the locking plate; the diameter expanding means further comprises an operating plate with pressurizing portions protruding on an outer circumference and a cap locked by a locking plate on each attaching case part.