Soft Light Box Chuck Assembly for Easier Long-Rib Folding
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Solution Overview
Problem
Large soft light boxes with longer umbrella ribs are cumbersome to store and open, making operation inconvenient due to their size and length.
Innovation Solution
A chuck assembly for a soft light box featuring a carrying ring and a rotating plate that allows umbrella ribs to be easily opened and folded by rotating and moving the plate up and down, facilitating the operation of the soft light box without requiring great strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the reflective area of the soft light box is increased to achieve better photographing effect, then the light uniformity and color vividness are improved, but the umbrella ribs become too long and difficult to store and open
Solution Approach 1:
The patent applies the dynamics principle by transforming the static, fixed-length umbrella ribs into a dynamic system where the rotating plate can swing between different angles (0-180 degrees) to control the extension of umbrella ribs. This allows the reflective area to be dynamically adjusted - when the plate swings to 180 degrees, the ribs extend to maximum length for large reflective area, and when swung to 0 degrees, the ribs fold back for compact storage, resolving the contradiction between large area and ease of operation.
2Area of stationary object
If the umbrella ribs are made longer to increase the reflective area, then the light uniformity is improved, but the length and complexity of the structure increases making it cumbersome
Solution Approach 1:
The patent implements the nesting principle by designing the umbrella ribs to be storable within the space created by the rotating plate mechanism. When the plate swings to 0 degrees, the long umbrella ribs fold back and nest within the compact structure, effectively hiding the length within the device's own footprint. This allows the structure to accommodate long ribs for large reflective area while maintaining compact form factor when not in use, reducing apparent structural complexity.
3Area of stationary object
If the umbrella ribs are made longer to achieve larger reflective area, then the photographing quality is improved, but the effort required to open and fold the ribs increases
Solution Approach 1:
The patent applies curvature through the arc-shaped pressing surface on the rotating plate that contacts the umbrella ribs. This curved surface design provides mechanical advantage by distributing the pressing force along the arc, reducing the peak force required to initiate movement of the long, stiff umbrella ribs. The curved geometry allows gradual engagement and leverage, making it easier to open and fold the ribs compared to a flat pressing surface, thus resolving the contradiction between large reflective area and reduced opening force.
Data Source
AI summary
The present disclosure provides a soft light box and a chuck assembly thereof. The chuck assembly includes a chuck and a rotating plate. The chuck includes a carrying ring and a sleeve. The carrying ring is arranged on the outer side of the sleeve and used to carry a plurality of umbrella ribs hingedly connected with the carrying ring. The rotating plate is rotatably sleeved on the sleeve, rotates in a circumferential direction of the sleeve, and moves up and down along the axial direction of the sleeve. The up-down motion of the rotating plate presses the hinged ends of the umbrella ribs, and drives the umbrella ribs to swing relative to the carrying ring.