Retractable Earphone Cable Storage with Friction Braking
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Solution Overview
Problem
Existing protective cases for handheld electronic devices do not effectively manage tangled or damaged headphone/earbud cables, as they often rely on spring-loaded mechanisms that apply undue pressure, leading to cable damage and shortening.
Innovation Solution
A protective carrier system with a retractable earphone/earbud system featuring molded plastic construction, wrap-around side walls, and a back panel with chambers and wire channels for secure cable storage, along with a friction-based braking system to control the rotational speed of the spring-biased spool during retraction, ensuring safe and controlled cable wrapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a spring-loaded mechanism is used to retract the cable, then automatic retraction function is provided, but the cable is subjected to undue pressure and may be damaged
Solution Approach 1:
The patent applies beforehand cushioning by incorporating a friction-based braking system that activates before the cable retraction is complete. This braking system gradually slows down the spool rotation, cushioning the cable against excessive speed and pressure that would otherwise cause damage. The friction brake creates controlled resistance throughout the retraction process, preventing the harmful effects of uncontrolled spring force.
Solution Approach 2:
The patent uses an intermediary approach by introducing a friction-based braking mechanism as a mediator between the spring-loaded spool and the cable. This braking system acts as an intermediate control element that modulates the force transmission from the spring to the cable, converting the potentially harmful high-speed retraction into a controlled, gradual process that protects the cable while maintaining automatic retraction functionality.
2Force
If a spring-loaded mechanism is used to retract the cable, then retraction force is provided, but the rotational speed becomes uncontrollable and damages the cable
Solution Approach 1:
The patent implements feedback control through a friction-based braking system that continuously monitors and adjusts the spool rotation speed during cable retraction. The braking mechanism provides real-time feedback resistance that counteracts excessive rotational speed, maintaining controlled retraction velocity while preserving the necessary retraction force. This feedback loop prevents uncontrollable speed buildup that would damage the cable.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the friction brake's resistance characteristics during the retraction process. The braking system modifies the friction parameter in response to spool rotation speed, creating a variable resistance that maintains optimal retraction force while controlling rotational speed. This parameter adjustment transforms the fixed-force spring mechanism into a controlled-speed system that protects the cable.
3Ease of operation
If the cable is wound tightly in a protective case, then storage organization is improved, but the cable becomes tangled and damaged
Solution Approach 1:
The patent applies dynamics by replacing static cable storage with a dynamic retractable spool system. The spool can rotate to pay out and wind in the cable as needed, providing organized storage when not in use while allowing controlled cable deployment during use. This dynamic mechanism prevents tangling by maintaining cable tension and guiding it through a fixed rotation path, unlike static winding methods that create random tangles.
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 solution provides a safe and controlled method for retracting and storing earphone/earbud cables, reducing the risk of damage and tangling, while allowing for easy access and use, and includes additional features like cell signal amplification and accessory storage.
Implementation Method 1
a cable management mechanism operable to automatically retract the cable into the storage chamber when the cable is in a disposed state
Implementation Method 2
The cable management mechanism comprises a friction-based braking system to control a rotational speed of the spool
Data Source
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AI summary
A retractable storage system for handheld electronic device comprises a removable panel with one or more storage chambers for storing an accessory item, such as a wireless earbud, cabled earbud, headphone cable or e-cigarette, and a retractable mechanism to retrieve and dispense the stored accessory item through an accessory station. The removable panel can be replaced with another removable panel configured with different structure to store different accessory item., such as a battery to charge a wireless earbud or e-cigarette.