Implantable Transducer Shock Management via Phase Transition Fluid
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Solution Overview
Problem
Existing bone conduction devices face issues with the piezoelectric transducer's movement during deceleration or acceleration, which can lead to deformation and damage, particularly when implanted, due to the lack of effective shock-proofing mechanisms.
Innovation Solution
The implementation of a phase transitioning fluid within the implantable component's housing that transitions between solid and fluid states to prevent or allow movement of the piezoelectric transducer, thereby temporarily shock-proofing the assembly and limiting excessive flapping or bending, ensuring the transducer's safety and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the piezoelectric transducer is allowed to move freely inside the housing, then the transducer can perform its function of producing vibrations for bone conduction, but the transducer is vulnerable to excessive movement and deformation during deceleration or acceleration
Solution Approach 1:
The patent changes the physical state parameter of the fluid medium within the housing. By transitioning the fluid between liquid and gel states, the system dynamically adjusts its viscosity and flow properties. In the gel state, the fluid provides strong resistance to transducer movement during shock events, while in the liquid state, it allows normal operational movement. This parameter change resolves the contradiction by making the protective effect conditional rather than constant.
Solution Approach 2:
The patent implements a dynamic shock-proofing mechanism where the fluid's physical properties change in response to operational conditions. The system transitions from a static protective approach to a dynamic one, where the fluid automatically adjusts its state based on detected shock levels or temperature changes. This dynamic behavior allows the transducer to move freely during normal operation while being protected during extreme events.
2Reliability
If a shock-proofing mechanism is implemented to prevent transducer movement during acceleration or deceleration, then the transducer is protected from deformation, but the transducer's ability to move for producing vibrations may be restricted
Solution Approach 1:
The patent utilizes phase transitions of the fluid medium as the core protective mechanism. The fluid transitions between liquid and gel phases based on temperature or shock detection. In the gel phase, the fluid becomes highly viscous and prevents excessive transducer movement during shock events. During normal operation, the fluid remains in the liquid phase, allowing the transducer to move freely for vibration production. This phase transition approach resolves the contradiction by making protection conditional rather than continuous.
Solution Approach 2:
The patent implements prior cushioning by pre-positioning the fluid medium within the housing to surround the transducer. The fluid is prepared in advance to provide protective cushioning when needed. During normal operation, the fluid remains in a low-viscosity state that does not interfere with transducer movement. When shock is detected or temperature increases, the fluid transitions to a high-viscosity gel state, providing beforehand-prepared cushioning exactly when required, thus protecting the transducer without restricting normal productivity.
3Reliability
If the fluid is controlled to limit transducer movement, then shock-proofing is achieved, but the fluid may interfere with normal transducer operation
Solution Approach 1:
The patent employs phase transitions of the fluid as the primary control mechanism. The fluid exists in a liquid state during normal operation, providing minimal resistance to transducer movement. When shock conditions are detected or temperature rises, the fluid transitions to a gel state, dramatically increasing its viscosity and limiting transducer movement. This phase transition ensures that the fluid only interferes with transducer operation when protection is actually needed, resolving the contradiction between shock-proofing effectiveness and operational freedom.
Solution Approach 2:
The patent implements periodic or conditional control of the fluid state based on operational conditions. The fluid transitions between liquid and gel states in response to periodic shock events or temperature cycles. During normal periods, the fluid remains liquid and non-intrusive. During shock events, the fluid transitions to gel state providing protection. This periodic action ensures that the fluid controls transducer movement only when necessary for shock-proofing, maintaining ease of operation during normal 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
This solution effectively prevents the piezoelectric transducer from excessive movement and deformation, maintaining its operational integrity during normal and extreme conditions, such as deceleration or acceleration, thereby enhancing the reliability and longevity of the bone conduction device.
Implementation Method 1
The implementation of a phase transitioning fluid within the implantable component's housing that transitions between solid and fluid states to prevent or allow movement of the piezoelectric transducer
Implementation Method 2
an electrical stimulus is provided via the electrode array to the auditory nerve, thereby causing a hearing percept
Data Source
AI summary
An implantable component, such as by way of example, an implantable component of a transcutaneous bone conduction device, the implantable component comprising a piezoelectric transducer, wherein the implantable component is configured to temporarily prevent the piezoelectric transducer from moving inside the housing while the housing is implanted in the recipient.