Waterproof String Lamp with Segmented Circuit and Heat-Shrink Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing Christmas string lamps are prone to failure when one lamp goes out, leading to a poor use effect, as they are not designed to maintain light emission in the event of a single bulb failure and lack adequate waterproofing for outdoor use.
Innovation Solution
A new waterproof string lamp design featuring a plastic lamp holder with a penetrating cavity, light-transmitting lampshade, light-emitting bulb, and leads with a resistor and heat-shrinkable sleeve for isolation, ensuring that if one bulb fails, the others can still emit light and maintaining waterproof integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional string lamp structure is used, then manufacturing is simple, but reliability deteriorates when one bulb fails causing the whole string to go out
Solution Approach 1:
The string lamp is divided into multiple independent lamp holder units, each containing its own bulb and circuit path. The series circuit is segmented into individual lamp holder sections that can be electrically isolated from each other, allowing one section to fail without affecting the others.
Solution Approach 2:
A conductor bridge is introduced as an intermediary element between adjacent lamp holders. This bridge provides an alternative electrical path that bypasses failed bulbs, maintaining circuit continuity through the intermediate conductor structure when direct bulb-to-bulb connection is broken.
2Reliability
If traditional lamp holder structure is used, then manufacturing is simple, but waterproof performance deteriorates for outdoor use
Solution Approach 1:
The lamp holder integrates multiple functions into a single molded structure: the holder body, bulb socket, and waterproof sealing elements are combined into one injection-molded plastic component. This merging of functions achieves waterproof performance while maintaining manufacturing efficiency through single-step molding.
Solution Approach 2:
A waterproof film or coating is applied to the lamp holder structure to create a water-tight barrier. The plastic lamp holder incorporates sealing films that prevent water penetration while maintaining the simplicity of the molded structure and assembly process.
3Reliability
If electrical terminals are exposed, then electrical connection is simple, but safety deteriorates with potential short circuits
Solution Approach 1:
The electrical terminal is nested within the molded plastic lamp holder body. The conductor enters the lamp holder and connects to the bulb socket through internal pathways, with all electrical components nested within the protective plastic housing that prevents exposure and short circuits.
Solution Approach 2:
The lamp holder uses composite construction combining plastic insulation material with metal conductor elements. The plastic provides electrical isolation and safety, while the metal provides conductive pathways, creating a composite structure that ensures both safety and electrical functionality.
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 excellent stability, reliability, and effective waterproofing, allowing the string lamp to maintain light emission even if one bulb fails, with improved structural integrity and use effect.
Implementation Method 1
a heat-shrinkable sleeve, the lower end of the heat-shrinkable sleeve is sleeved on the periphery of the upper end of the plastic lamp holder, and the lower end of the heat-shrinkable sleeve clasps the upper end of the plastic lamp holder
Data Source
AI summary
The present disclosure discloses a new waterproof string lamp and a component structure thereof. The new waterproof string lamp comprises a plastic lamp holder, a light-transmitting lampshade, a light-emitting bulb, and positive and negative leads, wherein a lamp holder accommodating cavity is formed in the core of the plastic lamp holder; the wire core of the positive lead is welded or riveted to the positive electrical terminal, and the wire core of the negative lead is welded or riveted to the negative electrical terminal; a plastic inner plug and a plastic bulb holder are embedded in the lamp holder accommodating cavity, the plastic inner plug is provided with a resistor, the light-emitting bulb is provided in the plastic bulb holder,The new waterproof string lamp has the advantages of new structural design, excellent stability and reliability and good use effect.