Screwless Spectacles Hinge With Spring-Defined End Positions
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Solution Overview
Problem
Existing spectacle hinges require adjustable spring forces for different usage environments and lack a fixed position in open or closed states, complicating assembly and potentially leading to deformation of the frame.
Innovation Solution
A screwless, spring-loaded spectacle hinge with a joint consisting of a front part, temple part, and compression spring element, featuring a retaining lug and pivot axes for tool-free assembly, allowing defined open and closed positions and minimizing frame deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If adjustable spring force is used to adapt to different usage environments, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent applies parameter changes by providing multiple spring elements with different spring constants (k values). Instead of using an adjustable mechanism, the invention selects the appropriate spring by changing the parameter of spring constant. Each spring element is designed with a specific k value to suit different usage environments, and the selected spring is fixed in the hinge, eliminating the need for adjustment mechanisms while maintaining adaptability.
2Ease of manufacture
If screwless assembly is used to simplify assembly process, then the ease of manufacture is improved, but the reliability of connection may worsen
Solution Approach 1:
The patent applies segmentation by dividing the hinge into separate modular components: a front part, a temple part, and a compression spring element. These segmented parts can be assembled without tools through a snap-fit mechanism where the front part is inserted into the temple part, and the compression spring provides automatic retention. This segmentation enables tool-free assembly while maintaining connection reliability through the spring-loaded retention system.
3Stability of the object's composition
If defined end positions are implemented to prevent frame deformation, then the stability is improved, but the device complexity increases
Solution Approach 1:
The patent applies self-service by designing a hinge where the compression spring automatically maintains the temple in defined end positions (open or closed) without requiring external control mechanisms. The spring's elastic force self-regulates to hold the temple against the frame, preventing deformation while allowing free movement between defined positions. This self-service mechanism eliminates complex position control systems while ensuring frame stability.
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 hinge provides secure, tool-free assembly and defined end positions, preventing frame deformation by maintaining consistent spring tension, reducing wear, and enabling easy replacement of components.
Implementation Method 1
a compression spring element (4) arranged between the front part (2) and the temple part (3) in such a way that the front part (2) is movably fixed on the pivot axes (6) of the temple part (3)
Data Source
Figure 1
Figure 2a~2c
Figure 3
AI summary
The present invention relates to a screw-free, resilient spectacles joint. The invention describes a joint for a spectacles frame having temples, wherein the joint (1) consists of a front part (2), a temple part (3) and a compression spring element (4), wherein the temple part (3) consists of a cuboid which is open to the front, along one side and inside, and short, inwardly directed hinge pins (6) are situated on the opposing inner faces (5) of the open cuboid, and wherein the front part (2) is in the form of a retaining lug (9), wherein the retaining lug (9) is designed to be insertable into the open cuboid of the temple part (3) and bearing catches (13) in the form of recesses are situated in two opposing outer surfaces of the retaining lug (9) and can be hooked onto the short hinge pins (6) of the temple part (3), as a result of which the front part (2) and the temple part (3) can be interconnected in an articulated manner, and the compression spring element (4) is situated between the front part (2) and the temple part (3) such that the front part (2) is movably fastened to the hinge pins (6) of the temple part (3).