Slide Hinge Cam Expansion for Honeycomb Cardboard Doors
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Solution Overview
Problem
Conventional slide hinges struggle to securely attach to doors made of honeycomb cardboard, as attaching screws do not work well, leading to instability and potential detachment during usage.
Innovation Solution
A slide hinge design featuring a pair of cam members that expand to protrude claw portions into the door's attaching holes, allowing secure fixation without screws, and using a single tool to align and bore circular holes for reduced labor, time, and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If attaching screws are used to fix the coupling case onto a door with honeycomb cardboard core, then the attachment method is simple and low-cost, but the attachment fails to be firm and the coupling case escapes during usage
Solution Approach 1:
The patent changes the attachment mechanism from screw-based to expansion-based. The expanding member transforms the attachment method by changing physical parameters (expansion ratio) to create a firm grip within the attaching hole, solving the problem of insufficient holding power on honeycomb cardboard doors while maintaining ease of installation.
Solution Approach 2:
The patent introduces an expanding member as an intermediary component between the coupling case and the door. This expanding member acts as a mediator that transfers and amplifies the attachment force, enabling firm fixation without requiring screws to penetrate the honeycomb cardboard core.
2Manufacturing precision
If multiple different sized circular holes are provided on the door for the coupling case and attaching case members, then the components can be properly positioned, but different tools are required and precision alignment becomes difficult
Solution Approach 1:
The patent makes the attaching case members universal by giving them identical circular contours. This allows a single drilling tool and hole size to be used for all attaching case members, eliminating the need for multiple tools and different hole sizes while maintaining proper positioning through the standardized design.
Solution Approach 2:
The patent applies homogeneity by making all attaching case members have the same circular contour and dimensions. This uniformity simplifies the manufacturing process, allowing precise hole positioning to be achieved with a single tool configuration rather than requiring multiple differently sized holes and tools.
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
Ensures secure attachment and reduced labor, time, and costs by allowing a single tool to align and bore holes, maintaining stability and preventing detachment.
Implementation Method 1
a pair of cam members (11a, 12a) respectively rotatably provided in first and second fixing means housing portions (7, 8)
Data Source
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AI summary
To provide a slide hinge which can ensure a reduction of time, labour and costs in boring, as well as to provide a cabinet using such a slide hinge, a solution is found in approaches that the attaching case is formed in the shape of a pair of circles of an identical diameter, with a segment of one circle overlapping that of the other, wherein the attaching case is provided in a direction perpendicular to the slide hinge main body, and it is provided with a housing portion capable of housing parts of the coupling pieces, as well as of the slide hinge main body, on its central portion; that it is further provided with a pair of fixing means housing portions, sandwiching the housing portion; and that each of the fixing means housing portions is provided with a plurality of craw portions provided so as to be projectable from and retractable in its circumferential wall, and with diameter expanding means for allowing each of the craw portions to protrude from each of the circumferential walls.