Eyewear Nosepad Pivot Axis Relocation for Wider Adjustment Range
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Solution Overview
Problem
Existing spectacles with adjustable nose supports face limitations in adjustment range and locking mechanism due to protruding pivot axes and inadequate latching, which compromise the strength and adaptability of the frame.
Innovation Solution
The design features wedge-shaped receiving grooves with a counter-lock mechanism, allowing pivot axes to shift closer to the lens edges, enabling a wide adjustment range while maintaining frame strength and ensuring reliable locking through a detent device, and optional asymmetry for additional adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the pivot axes are positioned on protruding legs of the holder against the flanks of the nose, then the nose pads can be adjusted, but the adjustment range is limited and the latching mechanism is inadequate
Solution Approach 1:
The pivot axes are relocated from the lateral flank area to the bridge area of the nose, representing a spatial repositioning that expands the adjustment range. The receiving grooves are designed with wedge-shaped cross-sections that guide the carrier webs into proper positioning, adding a dimensional control mechanism for the adjustment process.
Solution Approach 2:
Counter-latches are introduced as intermediary elements that interact with latching projections on the carrier webs. These counter-latches engage with the projections to secure the nose pads in their adjusted positions, providing a reliable latching mechanism that was previously inadequate.
2Adaptability or versatility
If laterally open receiving recesses are used for the carrier webs, then the nose pads can be adjusted, but the frame sections are weakened and lateral detachment risk increases
Solution Approach 1:
The receiving grooves are designed with wedge-shaped cross-sections that provide guiding and positioning functions while maintaining frame strength. The groove geometry allows the carrier webs to be inserted and positioned correctly without requiring large open recesses that would weaken the frame sections.
Solution Approach 2:
The wedge-shaped groove geometry acts as an intermediary mechanism that guides the carrier webs into proper positioning during adjustment. This geometric constraint provides the necessary adjustability while maintaining the structural integrity of the frame sections.
3Ease of manufacture
If the pivot axes are shifted toward the flanks of the nose, then the nose pads can be mounted, but the adjustment area is impaired
Solution Approach 1:
The pivot axes are repositioned from the lateral flank area to the bridge area of the nose, representing a spatial repositioning that maximizes the adjustment area. This dimensional change in axis location allows for greater angular adjustment range while maintaining proper mounting capability.
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to eyeglasses with a frame (2) for eyeglass lenses (3) and an adjustable nose support (6), the nose pads (8) of which are held in hinge bearings provided on a frame portion (5) in a pivotally adjustable manner by means of a respective carrier (9), said carrier comprising a web (10) which projects from the nose pads (8), engages into a receiving recess of the frame portions (5), and comprises a hinge axis (11) that runs in the longitudinal direction of the frame portion (5) and engages radially into a bearing recess (13) at the base of the receiving recess in the manner of a snap lock, wherein the carriers (9) are provided with a latching device for securing the pivot position of the carriers. The receiving recesses of the frame portions (5) are designed as receiving grooves (12) with a cross-section that tapers in the shape of a wedge and with a groove base that forms the bearing recess (13). An attachment (16) of the carrier (9) covers the receiving groove (12) at least at one end, said attachment being provided with a latch (15) which interacts with at least one counter latch (14) of the frame portions (5).