Multi-Level Sofa Hinge With Covered Gear for Finger Safety
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Solution Overview
Problem
Current sofa hinges with exposed gear mechanisms pose a risk of finger injury during position transitions, as they can snap operators' fingers when converting the sofa from one position to another.
Innovation Solution
A sofa hinge design featuring a semi-circular bracket, lever with notches, and a cover plate that conceals the gear mechanism, providing protection for operators' fingers by covering the internal components and reducing exposure to potential hazards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an exposed gear mechanism is used in the sofa hinge, then the conversion between positions is achieved, but the risk of finger injury increases
Solution Approach 1:
A cover plate is introduced as an intermediary component between the user's fingers and the exposed gear mechanism. The cover plate rotates with the hinge mechanism and physically blocks access to the gear teeth, allowing the conversion function to remain while eliminating the injury hazard.
Solution Approach 2:
The hazardous gear mechanism is effectively separated from the user-accessible area by the cover plate. The cover plate acts as a barrier that extracts the danger from the operational interface, allowing the gear mechanism to function while remaining inaccessible to fingers.
2Object-affected harmful factors
If a cover plate is added to conceal the gear mechanism, then finger injury risk is reduced, but the device complexity increases
Solution Approach 1:
The cover plate serves multiple functions: it conceals the gear mechanism from fingers, provides a smooth rotational surface for users, and acts as a structural component of the hinge assembly. This multi-functionality justifies the added complexity by delivering multiple benefits from a single component.
Solution Approach 2:
The cover plate is integrated with the existing hinge structure, rotating together with the brackets and gear mechanism. This merging approach combines the protective function with the existing motion mechanism, reducing the need for separate independent components.
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 allows for safe and easy conversion of the sofa between positions while significantly reducing the risk of finger injuries by shielding the gear mechanism, enhancing user safety.
Implementation Method 1
a first bracket (101) and a second bracket (102) that are rotatably connected together via a first bolt (103)
Implementation Method 2
The lever (105) comprises a plurality of notches (114), where the first lever latch (106) is bolted to an end of the lever (105) and where the second lever latch (110) comprises a pin (113) used to select one of the plurality of notches (114) of the lever (105) to select a position of the sofa (300)
Data Source
AI summary
A sofa hinge that provides easy conversion of a sofa convertible from one position to another while providing added safety by substantially reducing the risk of an injury to the operator's fingers. The sofa hinge includes a first and a second bracket rotatably connected to the sofa hinge at a bolt. The sofa hinge further comprises a lever gear mechanism connected to the first bracket via a first lever latch on the first bracket. The lever gear mechanism is connected to the second bracket via a second lever latch on the second bracket. The first bracket has cover plates on both the inside and outside surfaces of the bracket. The second bracket includes a cover plate attached on the outside surface. The second lever latch can larger than the first lever latch and function as an additional cover plate on the inside surface of the sofa hinge. By having the cover plates and second lever latch cover the lever gear mechanism of the sofa hinge on both the outside and inside surfaces of the sofa hinge, the risk of injury to the operator's fingers is substantially reduced.