Retractable Camping Lamp String Mechanism for Compact Battery Lighting

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Solution Overview

Problem

Existing camping lamps are large and inconvenient to carry, and they cannot be easily charged in the wild when battery power is depleted.

Innovation Solution

A tape camping lamp design featuring a rotating entwined module with a rolling bearing, allowing the lamp string to be pulled out and withdrawn easily, powered by replaceable dry batteries, and equipped with a control switch and power indicator for convenient operation and power management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If the lamp housing size is reduced to make the camping lamp compact and portable, then the occupied space and portability are improved, but the battery capacity and lighting duration are reduced

Engineering Contradiction:
Improvelamp housing volumeVSAvoidlighting duration
Core Design Contradiction:
Volume of moving objectVSDuration of action of moving object

Solution Approach 1:

The patent divides the lighting system into modular components: a compact lamp housing containing control electronics and a separate extendable lamp string with battery power. This segmentation allows the housing to remain small for portability while the lamp string can be extended to provide sufficient lighting duration and replaceable batteries enable extended use through battery replacement rather than recharging.

Inventive Principle:
Principle #1Segmentation

2Volume of moving object

If a retractable lamp string mechanism is implemented to improve portability, then the occupied space is reduced, but the mechanical complexity increases

Engineering Contradiction:
Improveoccupied spaceVSAvoidmechanical complexity
Core Design Contradiction:
Volume of moving objectVSDevice complexity

Solution Approach 1:

The patent implements a dynamic, rotatable entwined module that can transition between retracted and extended states. The module rotates on the base to allow the lamp string to be pulled out for use and then rotated back to withdraw it into the lamp housing. This dynamic mechanism provides compact storage while maintaining operational simplicity through rotational motion rather than complex linear retraction systems.

Inventive Principle:
Principle #15Dynamics

3Ease of operation

If dry batteries are used for power supply to enable easy replacement in the wild, then the ease of operation is improved, but the device complexity increases due to battery jar and replacement mechanism

Engineering Contradiction:
Improvebattery replacement easeVSAvoidpower supply system complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The power supply system is segmented into a removable battery jar and the main lamp housing. The battery jar can be easily detached and replaced without requiring tools or complex mechanisms. This segmentation allows users to quickly swap depleted batteries for charged ones in the field, maintaining ease of operation while keeping the overall system design simple and modular.

Inventive Principle:
Principle #1Segmentation

4Area of stationary object

If the lamp string is made long to provide sufficient lighting coverage, then the lighting area is improved, but the storage space requirement increases

Engineering Contradiction:
Improvelighting areaVSAvoidstorage space
Core Design Contradiction:
Area of stationary objectVSVolume of moving object

Solution Approach 1:

The lamp string is integrated with a rotatable entwined module that enables the long lamp string to be dynamically extended for lighting coverage and then rotated back to retract into the lamp housing. This dynamic mechanism allows the lamp string to achieve sufficient lighting area when extended while maintaining compact storage volume when retracted, effectively resolving the contradiction between lighting coverage and storage space.

Inventive Principle:
Principle #15Dynamics

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 design provides a compact, easy-to-carry lamp with extended lighting time, stable string withdrawal, and efficient battery replacement, ensuring reliable lighting without the need for recharging.

Implementation Method 1

The rolling bearing is configured to allow the entwined module to rotate on the base

Methodology Applied
Scientific EffectRolling bearing: Ball Bearing

Data Source

PatentUS12486957B1Tape camping lamp
Publication Date: 2025.12.02 LIANG LU
  • US12486957B1 patent drawing
  • US12486957B1 patent drawing
  • US12486957B1 patent drawing

AI summary

The present disclosure discloses a lighting lamp, and aims to provide a tape camping lamp which is small in occupied space and convenient to carry, can prevent power shortage of batteries, and is convenient to use and good in lighting effect. The key point of the technical scheme lies in that a lamp string is arranged on an entwined module inside a lamp housing. The entwined module rotates on a base through a rolling bearing. The base includes a relatively fixed annular mounting structure and a rotating part which is arranged inside the annular mounting structure and can rotate relative to the annular mounting structure. The annular mounting structure is connected with the lamp housing. The pull-out and withdrawal of the lamp string are realized while the lamp housing and the annular mounting structure keep still.