Screw-in Lamp Base with Axially Movable Conductor
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Solution Overview
Problem
Existing screw-in type lighting devices with rotational asymmetry face challenges in maintaining electrical contact when adjusted, leading to potential disconnection or fire hazards due to loose fittings.
Innovation Solution
A screw-in type base with a threaded tubular enclosure and a compliant thin-walled base bottom conductor that is axially movable, allowing rotational adjustment without breaking electrical contact, and featuring a resilient structure for secure engagement with the socket.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lighting device is rotated to adjust its position or direction, then the visual appearance and light emission direction are improved, but the electrical connection is loosened or broken
Solution Approach 1:
The base bottom conductor is designed as a resilient, axially movable component that can dynamically adjust its position. When the lighting device rotates, the conductor moves axially to accommodate the rotation while maintaining continuous electrical contact with the socket bottom conductor, resolving the contradiction between rotational adjustment and connection stability
Solution Approach 2:
The electrical connection parameters are changed by allowing axial movement of the base bottom conductor. The conductor's resilience and ability to move axially enable it to maintain optimal contact pressure and electrical connection stability throughout the rotation range, preventing loosening or breaking of the connection
2Reliability
If a spring coil biased movable conductor is used to maintain electrical contact during rotation, then the electrical connection reliability is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The base bottom conductor combines multiple functions into a single component: it serves as both the electrical contact element and the resilient, axially movable mechanism. This merging eliminates the need for separate spring coils and movable conductors, reducing part count and assembly complexity while maintaining connection reliability
Solution Approach 2:
The base bottom conductor is designed as a multi-functional component that provides electrical conduction, mechanical resilience, axial movement capability, and rotational accommodation all in one element. This universality reduces the overall device complexity compared to using separate specialized components for each function
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 rotational adjustment of lighting devices with rotational asymmetry while maintaining a secure electrical connection, reducing the risk of disconnection and enhancing safety by allowing the base to be turned without loosening in the socket.
Implementation Method 1
a base bottom conductor arranged to be in electrically conductive contact with a light source of the lighting device, and arranged to make electrically conductive, biased contact with the socket bottom conductor when the lighting device is mounted in the socket, wherein the base bottom conductor comprises a cylindrical compliant thin-walled member partly embedded in the base and arranged such that the base bottom conductor is, relative to the enclosure, movable in the axial direction in response to engagement with the socket bottom conductor
Data Source
AI summary
The present invention relates to a screw-in type base for a lighting device being arranged to be mounted in a socket comprising a socket bottom conductor is provided. The base (100, 200, 300) comprising a threaded tubular enclosure (102) extending along an axial direction between a first (102a) and a second (102b) end portion of the enclosure (102), a base bottom conductor (103, 203, 311) arranged to be in electrically conductive contact with a light source (106) of the lighting device (400), and arranged to make electrically conductive, biased contact with the socket bottom conductor when the lighting device (400) is mounted in the socket, wherein the base bottom conductor (103, 203, 311) comprises a compliant thin-walled member (105, 205, 308) arranged such that the base bottom conductor (103, 203, 311) is, relative to the enclosure (102), movable in the axial direction in response to engagement with the socket bottom conductor when the lighting device (400) is mounted in the socket. The present invention also relates to a lighting device (400) comprising the base.