Adjustable Picture Hanger with Threaded Height Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing picture hangers with a fixedly mounted upper piece and a lower piece connected by a screw face difficulties in gripping the small nut in confined spaces and tend to bend under heavy loads, making it hard to adjust the height of the lower piece relative to the upper piece.
Innovation Solution
A two-piece picture hanger design featuring a threaded shaft connecting the upper and lower pieces, with strengthening ribs and a notched shaft head to prevent removal, allowing for easy height adjustment and enhanced structural integrity to prevent shelf bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a small nut is used to connect the screw in a confined space under a shelf, then the device complexity is reduced, but the ease of operation deteriorates because installers find it difficult to grip the small nut while turning the screwdriver
Solution Approach 1:
The connection structure is divided into two separate components: a nut embedded in the shelf and a screw with an integrated drive mechanism. This segmentation allows the screwdriver to engage the screw head directly without needing to grip a separate small nut, solving the ease of operation problem while maintaining device simplicity
Solution Approach 2:
The drive mechanism (slot or recess) is merged directly into the screw head, combining the fastening function and the driving function into a single component. This eliminates the need for a separate nut that would be difficult to grip in confined spaces
2Quantity of substance
If the shelf is made thin to reduce material usage, then the manufacturing cost is reduced, but the strength deteriorates causing the shelf to bend under heavy loads
Solution Approach 1:
The shelf is designed with non-uniform thickness: thin at the edges to reduce material usage and cost, but with a thicker central portion or reinforcement ribs to maintain strength and prevent bending under load. This local variation in quality optimizes both material efficiency and structural integrity
Solution Approach 2:
The shelf incorporates reinforcement ribs or structural elements that create a composite structure, combining thin material with strategic thickening or reinforcement to achieve high strength-to-weight ratio and prevent bending while minimizing overall material usage
3Adaptability or versatility
If the lower piece is made adjustable to align multiple objects, then the adaptability is improved, but the device complexity increases due to the threaded connection mechanism
Solution Approach 1:
The lower piece is designed with a movable, adjustable position relative to the upper piece through the threaded screw mechanism. This dynamic capability allows the hanger to adapt to different heights and alignment requirements, providing versatility while the standardized thread design keeps the complexity manageable
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
Facilitates easy height adjustment of the lower piece relative to the fixed upper piece, ensuring the object is aligned correctly and preventing shelf bending under load, thereby simplifying installation and maintaining the desired position of the object on the wall.
Implementation Method 1
The aperture on the shelf on the lower piece includes threads that mate with the threads on the shaft so that when the upper piece is fixedly mounted on the vertical surface by the elongated fastener the lower piece is held in place only by the threads of the shaft engaging the threads in the aperture on the shelf on the lower piece
Data Source
AI summary
A picture hanger has an upper piece, a lower piece, and a screw that extends through apertures in shelves on bases of the pieces. The aperture on the lower piece has threads mating with the screw threads on the shaft so that when the upper piece is fixedly mounted on the vertical surface by an elongated fastener the lower piece is held in place only by the threads of the shaft engaging the threads in the aperture on the lower piece shelf. The base of the lower piece carries a picture wire receiving hook so that turning the screw enables the height of the picture to be changed. Strengthening ribs extend between the base and shelf of both pieces.