Concealed Automobile Glare Shield Sliding Groove Mechanism
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Solution Overview
Problem
Conventional sun visor designs with concealed glare shields face issues of unstable sliding and wear, leading to difficulties in positioning and operation, which limits their practical utility and availability in the market.
Innovation Solution
A sun visor device featuring a track device with an outer, middle, and inner track, along with positioning members and a supporting rod, that allows for smooth sliding and precise positioning of the glare shield, reducing wear and enhancing operational ease by using ball-supported tracks and adjustable pressing springs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional sun visor is used that is not transmittable to light, then the glare blocking effect is achieved, but the driving safety is adversely affected due to limited interior space and blocked eyesight
Solution Approach 1:
The invention divides the sun visor system into two functional parts: a fixed non-transmittable sun visor for basic glare blocking, and a separate light-transmittable glare shield that can be pivoted into position only when needed. This segmentation allows the glare blocking function to be activated selectively without continuously blocking the driver's view, thus maintaining driving safety while achieving effective glare blocking when required.
2Ease of operation
If a light-transmittable glare shield is clipped to the sun visor, then driving safety is improved while effectively filtering glare, but the glare shield becomes visually protrusive and blocks make-up mirror and night lamp
Solution Approach 1:
The glare shield is designed with a pivotal connection that allows it to dynamically change position between a retracted state (flush with the sun visor surface, not blocking mirrors or lamps) and an extended state (pivoted downward to provide glare blocking). This dynamic positioning resolves the contradiction by making the protrusion temporary and conditional rather than permanent.
3Reliability
If a three-sided rigid frame with guide stops is used, then the glare shield can be prevented from falling out, but the structure has significant thickness and limits practical utility
Solution Approach 1:
The invention extracts the retention function from a thick rigid frame structure and implements it through a thin receiving groove formed in the sun visor body, combined with lateral resistance provided by the guiding groove. This extraction maintains the reliability of preventing the glare shield from falling out while dramatically reducing the structural thickness to enable practical utility.
4Measurement precision
If the glare shield is made wider to improve positioning, then lateral resistance is improved, but the unbalanced force components increase causing shear force and wear
Solution Approach 1:
The invention introduces a vertical dimension to the positioning mechanism through the guiding groove, which provides lateral resistance perpendicular to the direction of pulling force. This dimensional addition allows the glare shield to be positioned precisely without requiring excessive width, thereby reducing the unbalanced force components and minimizing wear on the connection points.
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 solution provides a stable and efficient sliding mechanism for the glare shield, reducing wear and improving operational ease, allowing for effective glare blocking while maintaining aesthetic and functional integrity of the sun visor.
Implementation Method 1
each of the two positioning members includes a pressing spring received in a central portion thereof and a pressing member received in an outer end thereof, wherein the pressing spring biases the pressing member outwards to provide the pressing member with an outward pressing force
Implementation Method 2
A sun visor device featuring a track device with an outer, middle, and inner track, along with positioning members and a supporting rod, that allows for smooth sliding and precise positioning of the glare shield, reducing wear and enhancing operational ease by using ball-supported tracks
Data Source
AI summary
A sun visor device includes a sun visor including a receiving portion having two guiding grooves at two lateral sides thereof. A glare shield is slidably received in the receiving portion. A track device is disposed in the receiving portion and includes an outer track, a middle track slidably received in the outer track, an inner track slidably received in the middle track and fixed to a supporting rod. Two positioning members are disposed on two ends of the supporting rod, respectively. A pressing member is received in an outer end of each positioning member and is biased outward by a pressing spring to slidably abut an inner wall of an associated guiding groove. Each positioning member further includes a clamping unit fixed to two ends of the glare shield, such that the glare shield is jointly movable with the supporting rod.