Memory Alloy Strap Adjustment for Precise Wearable Fit
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Solution Overview
Problem
Existing wearable devices lack adaptive and stepless adjustment mechanisms for connection components, leading to discomfort and reduced detection precision due to gaps between the device and the user, complicating the adjustment process and degrading user experience.
Innovation Solution
A distance adjustment apparatus using memory alloy components that adjust length electrically and steplessly by controlling temperature changes with current, facilitated by sensors and a controller to ensure proper fit and contact pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual adjustment of connection component length is used, then device structure is simple, but adaptability to different users is poor and wearing comfort is reduced
Solution Approach 1:
The connection component incorporates a memory alloy spring that enables dynamic, automatic adjustment of length based on temperature changes. The spring transitions between different shapes at different temperatures, allowing the device to adapt to different users and wearing conditions without manual intervention, thus improving adaptability while maintaining relatively simple device structure.
Solution Approach 2:
The patent utilizes temperature as a controllable parameter to change the shape of the memory alloy spring. By applying heat (e.g., through a heating element or body heat), the spring transforms from a first shape to a second shape, thereby changing the length of the connection component. This parameter-based approach enables adaptive adjustment without complex mechanical mechanisms.
2Measurement precision
If gap is reserved between connection component and user for comfort, then wearing comfort is improved, but detection precision of sensors is reduced
Solution Approach 1:
The memory alloy spring provides dynamic adjustment capability that allows the connection component to automatically adapt to different wrist sizes and thicknesses. The spring can elongate or contract based on temperature control, ensuring optimal contact pressure between the sensor and the user's wrist while maintaining wearing comfort. This resolves the contradiction by making the system adaptive rather than static.
Solution Approach 2:
The patent incorporates sensors (such as force sensors or distance sensors) that detect the contact pressure or gap between the connection component and the user. This feedback information is used to control the heating element, which in turn adjusts the shape of the memory alloy spring to achieve the desired contact pressure. This closed-loop feedback system simultaneously optimizes both detection precision and wearing comfort.
3Ease of operation
If fastening belt length is fixed, then device structure is simple, but ease of length adjustment is poor
Solution Approach 1:
The memory alloy spring enables the connection component to automatically adjust its length without user intervention. By controlling the temperature of the spring (through heating elements or utilizing body heat), the spring autonomously transforms between different shapes to achieve the required length. This self-adjusting capability greatly improves ease of operation while keeping the adjustment mechanism relatively simple.
Solution Approach 2:
The patent replaces traditional mechanical adjustment mechanisms (such as buckles, sliders, or multiple length options) with a thermally-controlled memory alloy spring system. This substitution eliminates complex mechanical parts while providing continuous, stepless length adjustment capability, thereby improving ease of operation without significantly increasing device complexity.
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 comfortable and precise fitting of wearable devices by automatically adjusting to individual user dimensions, enhancing user experience and detection accuracy without manual intervention.
Implementation Method 1
a memory alloy component disposed in a connection region between the first component and the second component, wherein the memory alloy component is controlled by current to drive the first component and the second component to move closer to and/or away from each other
Implementation Method 2
the memory alloy component is controlled by current
Data Source
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AI summary
A distance adjustment apparatus and a control method of the distance adjustment apparatus are provided. The distance adjustment apparatus includes a connection component (200), and the connection component includes a first component (1) and a second component (2). The first component (1) is connected to the second component (2), and a memory alloy component (3) is disposed in a connection region between the first component (1) and the second component (2). The memory alloy component (3) is controlled by a current to drive the first component (1) and the second component (2) to move closer to and/or away from each other. In this way, a distance between the first component (1) and the second component (2) is adjusted, and a length of the connection component can be adjusted. Therefore, electric and stepless adjustment of the length of the connection component can be implemented.