Removable Loudspeaker Battery Pack With Vibration-Resistant Retention
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Solution Overview
Problem
Conventional loudspeakers for public address and musical performances often require grid power and cords, limiting their portability and usability in cordless, fully battery-powered configurations, and lack secure and vibration-resistant battery pack retention systems.
Innovation Solution
A loudspeaker design featuring a removable battery pack assembly with electrochemical cells, a multi-pin connector, and cooperative keying features that ensure proper orientation and secure insertion into a battery receptacle, along with a battery door secured by threaded fasteners for enhanced retention and reduced vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a removable battery pack is used for cordless operation, then portability and ease of operation are improved, but battery retention security and vibration resistance deteriorate
Solution Approach 1:
The battery system is divided into a removable battery pack and a loudspeaker unit with separate mounting mechanisms. The battery pack includes its own door assembly with fasteners that independently secure to the loudspeaker, allowing the battery to be removed and replaced without affecting other components.
Solution Approach 2:
The battery door is pre-secured to the battery pack housing with multiple fasteners before insertion into the loudspeaker. This preliminary securing ensures that the battery pack maintains structural integrity and proper orientation during insertion and operation, preventing vibration-induced loosening.
2Reliability
If a threaded fastener is used to secure the battery door, then battery retention security is improved, but device complexity increases
Solution Approach 1:
The fastening system is segmented into multiple independent threaded fasteners distributed around the battery door perimeter. Each fastener operates independently to secure the door to the battery pack, providing redundant security without requiring a complex integrated locking mechanism.
Solution Approach 2:
The threaded fasteners are positioned asymmetrically around the battery door assembly, with different numbers and locations of fasteners on different sides. This asymmetric distribution optimizes the mechanical strength distribution to counteract vibration forces from various directions while maintaining a relatively simple overall structure.
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 fully portable, cordless operation with secure battery retention, minimizing vibration and ensuring reliable power supply for the audio transducer, enhancing user satisfaction and performance stability.
Implementation Method 1
a battery pack having a plurality of electrochemical cells to generate an output voltage configured to power the audio transducer
Implementation Method 2
The battery door is further secured to the enclosure with a threaded fastener configured to be tightened parallel to the longitudinal direction
Data Source
AI summary
A loudspeaker includes an enclosure defining an open front side, and an audio transducer positioned within the enclosure and configured to emit sound in a forward direction from the open front side of the enclosure. A battery receptacle is provided by the enclosure, and a removable battery pack assembly is selectively received within the battery receptacle along a longitudinal direction. The removable battery pack assembly includes a battery pack having a plurality of electrochemical cells to generate an output voltage configured to power the audio transducer. A connector at an insertion end of the battery pack electrically connects the electrochemical cells with the audio transducer. A battery door is secured with a plurality of removable fasteners to a base end of the battery pack opposite the insertion end. The battery door is further secured to the enclosure with a threaded fastener configured to be tightened parallel to the longitudinal direction.