Light Bulb Changing Tool With Telescoping Pole And Controlled Torque
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Solution Overview
Problem
Existing light bulb changing devices fail to address accessibility issues for overhead lights, lack adjustability for varying bulb sizes and heights, and do not control torque effectively, leading to potential bulb breakage and difficulty in actuating mechanisms from both ends.
Innovation Solution
A light bulb changing tool with telescoping extension tubes and flexible fingers that can be actuated from both ends, controlled torque, and adjustable length to accommodate different ceiling heights and bulb sizes, using a compression spring and pulley system to provide mechanical advantage and prevent bulb breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a light bulb changing device is designed to reach overhead lights, then accessibility to elevated positions is improved, but the device becomes difficult to actuate from both proximal and distal ends
Solution Approach 1:
The device is divided into two independent actuation systems: a proximal actuation mechanism with a handle and trigger for gripping the bulb base, and a distal actuation mechanism with a button on the gripping fingers for releasing the bulb. This segmentation allows operation from either end of the extended device without requiring complex transmission mechanisms.
Solution Approach 2:
The gripping fingers act as an intermediary element that can be actuated independently from both ends. The distal button on the fingers provides a mediation point for releasing the bulb when the device is extended, while the proximal trigger provides alternative actuation when the device is retracted, eliminating the need for complex cable or linkage systems.
2Adaptability or versatility
If the device is made adjustable for varying bulb sizes, then adaptability is improved, but the mechanism becomes more complex and difficult to adjust
Solution Approach 1:
The gripping fingers are designed with spring-loaded tips that dynamically adjust to different bulb diameters. The springs allow the fingers to flex and conform to various bulb sizes without requiring manual adjustment mechanisms, locks, or complex positioning systems. The gripping force automatically adapts to the bulb size through the elastic deformation of the spring elements.
Solution Approach 2:
The gripping characteristics are changed by varying the spring constants and pre-loads of the spring elements in the fingers. By adjusting these parameters during design, the device can accommodate a range of bulb sizes without requiring operational adjustment mechanisms. The gripping force and finger opening distance are controlled through spring parameter selection rather than mechanical adjustment.
3Reliability
If torque is increased to secure grip on light bulbs, then gripping reliability is improved, but the light bulb may break due to excessive torque
Solution Approach 1:
The spring-loaded gripping fingers are pre-loaded with a controlled force that is sufficient to securely grip the bulb before rotation begins. This preliminary gripping action ensures reliable attachment to the bulb base without requiring excessive torque during the gripping phase. The spring pre-load is calibrated to provide adequate friction and mechanical engagement.
Solution Approach 2:
The spring elements act as cushioning elements that absorb and limit the maximum gripping force applied to the bulb. If excessive force is applied, the springs compress and deform elastically, preventing the transmission of damaging peak loads to the bulb glass. This beforehand cushioning protects the bulb from breakage while maintaining secure grip under normal operating conditions.
4Ease of operation
If the device is extended to reach higher lights, then accessibility is improved, but the handling and control of the device becomes more difficult
Solution Approach 1:
The device employs a telescoping pole structure where nested tubes slide within each other to extend and retract the device length. This nesting arrangement provides a compact storage configuration while allowing extension to reach high ceiling lights. The nested tubes are equipped with simple lock mechanisms that engage at predetermined extension positions, providing stable support without complex hydraulic or mechanical extension systems.
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
Enables safe and easy installation and removal of light bulbs from elevated positions, accommodating various sizes and heights, while controlling torque to prevent bulb breakage and simplifying operation for users of all strengths.
Implementation Method 1
using a compression spring and pulley system to provide mechanical advantage and prevent bulb breakage
Implementation Method 2
flexible fingers that can be actuated from both ends, controlled torque
Implementation Method 3
using a compression spring and pulley system to provide mechanical advantage
Implementation Method 4
pulley system to provide mechanical advantage and prevent bulb breakage
Implementation Method 5
telescoping extension tubes and flexible fingers that can be actuated from both ends, controlled torque, and adjustable length to accommodate different ceiling heights and bulb sizes
Data Source
AI summary
A light bulb changing device with expandable fingers is extendable to allow a person to install and remove light bulbs from an elevated ceiling without need for climbing a ladder. The device includes a tube, with the fingers attached thereto. A horn is slidably disposed on the top, movement of the horn adjusts the movement of the fingers. A compression spring and pulley housing with pulleys therein actuate movement of a tension member allowing for opening of the fingers and closing the fingers around a light bulb with limited torque to avoid breaking the light bulb.