Focus-Adjustable Lighting Device With Semi-Helical Guide Groove

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Solution Overview

Problem

Existing zoom lamps suffer from unstable focus adjustment and low zoom accuracy, making it difficult to produce precise lighting effects for various applications.

Innovation Solution

A focus-adjustable lighting device with a housing, light source module, focus-adjustable mechanism, and light guiding unit, featuring a rotating member with a semi-helical guide groove and engaging unit, allowing precise control of the distance between the light guiding unit and light source module to adjust beam angle and light spot size.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a rotating member with continuous rotation is used for focus adjustment, then the device can achieve continuous beam angle adjustment, but the focus adjustment becomes unstable and zoom accuracy decreases

Engineering Contradiction:

Improvebeam angle adjustment rangeVSAvoidzoom accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent transforms the continuous rotation capability into a controlled stepwise motion system. The rotating member can still rotate continuously for broad coverage, but the limiting member with guide groove and engaging unit with convex portions converts this into discrete positional steps, achieving both adaptability and precision

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The limiting member acts as an intermediary between the rotating member and the light guiding unit. Through the guide groove and engaging unit mechanism, it mediates the rotation motion to produce controlled stepwise adjustments, resolving the contradiction between continuous adjustment capability and precise positioning

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If a simple rotating mechanism is used for focus adjustment, then the device structure remains simple, but the focus adjustment becomes unstable and cannot restrict rotation steps

Engineering Contradiction:

Improvemechanism structureVSAvoidfocus adjustment stability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The limiting member is segmented into a guide groove portion and multiple engaging units with convex portions. This segmentation allows the mechanism to provide both guidance for stable motion and discrete engagement points for restricted stepwise rotation, achieving reliability without excessive complexity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The guide groove is designed with a curved or semi-helical shape that guides the engaging unit during rotation. This curved path ensures smooth transitions between positions while the convex portions provide discrete stopping points, combining stability with controlled stepwise motion

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentUS11125417B2Focus-adjustable lighting device

Publication Date: 2021.09.21 XIAMEN SANAN OPTOELECTRONICS CO LTD

AI summary

A focus-adjustable lighting device includes a housing, a light source module, a focus-adjustable mechanism, and a light guiding unit. The focus-adjustable mechanism includes a rotating member and a first limiting member. The rotating member is rotatable relative to the housing, and has a semi-helical guide groove, and an engaging unit that includes a plurality of spaced-apart concave grooves corresponding in position to the semi-helical guide groove. The first limiting member includes a first limiting portion disposed in the semi-helical guide groove, and a second limiting portion spaced apart from the first limiting portion. The light guiding unit is movable with the rotating member.