Eyeglass Hinge Assembly Without Screws or Rivets
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Solution Overview
Problem
The connection between the temple and the front of eyeglasses using traditional hinges requires small screws, which complicates assembly and is prone to failure due to repeated stress, necessitating specialized opticians and affecting aesthetics.
Innovation Solution
A simplified hinge design using an L-shaped connecting element with a spherical retention and locking element, allowing direct assembly without screws, rivets, or adhesive bonding, ensuring durability and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screws are used to connect the temple to the front of the eyeglasses, then the connection can be achieved, but the assembly process becomes complex and requires specialized opticians
Solution Approach 1:
The patent removes the screw from the connection system entirely. The temple is directly integrated with the front of the eyeglasses through a recess and protrusion geometry that eliminates the need for separate fastening components, thereby simplifying assembly while maintaining connection reliability
Solution Approach 2:
The patent merges the temple and front of the eyeglasses into a single integrated structure. The connection interface is built into the geometry of the components themselves, combining the functions of structural support and fastening into one unified design that requires no separate assembly steps
2Ease of manufacture
If traditional hinges with screws are used, then the connection can be made, but the connection is delicate and prone to failure under stress
Solution Approach 1:
The patent segments the connection interface into a recess in the front of the eyeglasses and a corresponding protrusion in the temple. This segmentation allows each component to be manufactured independently with simple geometries while creating a robust interlocking connection that resists stress and failure
Solution Approach 2:
Instead of using a protruding screw to fasten components together, the patent uses a recessed geometry where the temple fits into the front of the eyeglasses. This inverted approach eliminates stress concentration points associated with screw threads and fastening holes, resulting in a more durable connection
3Reliability
If multiple small components like screws, rivets, and bushings are used for coupling, then the connection can be achieved, but the production time increases
Solution Approach 1:
The patent extracts all small fastening components (screws, rivets, bushings) from the connection system. The temple and front of the eyglasses are designed with complementary geometries that allow direct coupling without any intermediate fasteners, dramatically reducing production time while maintaining connection strength
Solution Approach 2:
The patent combines the functions of multiple separate components into a single integrated connection interface. The recess and protrusion geometry performs the functions of alignment, fastening, and stress distribution that previously required multiple separate components, thereby streamlining production
4Reliability
If welding spots or adhesive bonding spots are used to connect the temple to the front, then the connection can be made, but the process becomes more complex and time-consuming
Solution Approach 1:
The patent replaces thermal processes (welding) and chemical processes (adhesive bonding) with a purely mechanical interlocking system. The recess and protrusion geometry provides a physical connection that achieves reliability without the complexity and time requirements of welding spots or adhesive bonding spots
Data Source
AI summary
Eyeglasses with simplified hinge include a pair of lenses, a pair of temples and a hinge for connection between each one of the temples and the lenses. The hinge includes an element for connecting the lens and the temple, adapted to be connected to the lens at one end and provided, at an opposite end, with a portion adapted to engage a retention and locking element. The temple is provided with a cavity adapted to accommodate and lock the retention and locking element, the retention and locking element acting as a rotation fulcrum for the temple with respect to the connecting element.