Furniture Frame Hinge Assembly Without a Transversal Pin
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Solution Overview
Problem
Existing hinges for furniture with front frames are complex, imprecise, and not compact due to the use of transversal pins and adjusting screws that lead to assembly difficulties and resistance issues.
Innovation Solution
A hinge design featuring a base plate, intermediate plate, hinge arm, and adjusting screw with hinging means provided by side wings and projections that eliminate the need for a transversal pin, allowing for precise adjustment and compactness, and side retaining parts for guiding the intermediate plate without play.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a transversal pin is used to connect the base plate, intermediate plate, and hinge arm, then the structural resistance is improved, but the device complexity and assembly difficulty increase
Solution Approach 1:
The patent merges the functions of multiple separate connecting elements (base plate, intermediate plate, hinge arm, and transversal pin) into an integrated construction where the hinge arm is directly connected to the intermediate plate through hinging means, eliminating the need for the transversal pin and reducing assembly complexity while maintaining structural integrity
Solution Approach 2:
The patent extracts and removes the transversal pin from the hinge assembly, replacing it with direct hinging means between the hinge arm and intermediate plate. This extraction eliminates the harmful factor of assembly complexity while preserving the necessary structural resistance through the redesigned connection mechanism
2Manufacturing precision
If multiple adjusting means (cam and adjusting screw) are used between the base plate, intermediate plate, and hinge arm, then the adjustment precision is improved, but the device complexity increases
Solution Approach 1:
The patent combines the adjustment functions into a more integrated system where the adjusting screw directly engages with the hinge arm, and the cam mechanism is streamlined. This merging reduces the number of separate adjusting means while maintaining precise adjustment capabilities through the coordinated action of the simplified components
3Adaptability or versatility
If the adjusting screw engages with the edges or profiled wings at an opening of the hinge arm, then the adjustment range is improved, but the measurement precision and coupling resistance decrease
Solution Approach 1:
The patent applies local quality by providing a specifically designed threaded engagement zone on the hinge arm where the adjusting screw directly engages. This localized threaded opening provides precise angular adjustment control at the critical connection point, while the overall hinge arm structure maintains the necessary adjustment range through its geometric design and hinging means
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 solution results in a structurally resistant, compact, and easily assemblable hinge with precise adjustment capabilities, reducing overall costs and assembly complexity while ensuring reliable coupling between parts.
Implementation Method 1
an intermediate plate slidably connected to the base plate and movable, by an adjusting cam, along the longitudinal direction of the said longitudinal plane
Implementation Method 2
the box being swingably connected to a front end of said hinge arm by an articulation pin
Implementation Method 3
adjusting means for adjusting the angle between said hinge arm and said intermediate plate, comprising at least an adjusting screw
Data Source
AI summary
The hinge for mounting a door on a piece of furniture provided with a front frame comprises a base plate fixable to the front frame of the piece of furniture, an intermediate plate slidably connected to the base plate and movable by an adjusting cam, a hinge arm connected to the intermediate plate swingably according to a transversal axis and mobile by means of an adjusting screw; the intermediate plate, at a rear end thereof, exhibits side wings having hinging projections which project on opposite sides according to the transversal axis so as to engage rotatably in rear side holes of the hinge arm. The base plate exhibits retaining side parts for the intermediate plate, conformed and arranged such as to retain the side edges of the intermediate plate in a perpendicular direction to the longitudinal extension plane of the base plate.