Head-Mounted Device Support With Sensor-Based Strap Adjustment
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Solution Overview
Problem
Existing head-mounted devices require manual adjustment of straps for a comfortable fit, which is complex and time-consuming, and automatic adjustment systems often require user input for head size or suffer from motor lock-up at extreme positions.
Innovation Solution
A head-mounted device support with telescopic arms and a tightness adjustment mechanism, controlled by a control module, automatically adjusts to fit the user's head size using sensors or pressure detection, and includes safety mechanisms to prevent motor lock-up.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual adjustment of straps is used, then the device can be fixed on the user's head, but the wearing complexity increases and requires time-consuming manual adjustment
Solution Approach 1:
The head-mounted device automatically adjusts the strap tightness through a motor-driven telescopic arm mechanism. The control module autonomously controls the motor to adjust the overlapping length of telescopic arms, thereby automatically adjusting the tightness of the strap around the user's head without requiring manual intervention. This self-service approach resolves the contradiction by eliminating manual adjustment operations while maintaining reliable fixing.
Solution Approach 2:
The patent replaces the traditional manual mechanical adjustment system with an automated electromechanical system. A motor is introduced to drive the telescopic arms, substituting the manual mechanical tightening process with an automated motor-driven mechanism. This substitution maintains the mechanical fixing function while eliminating the need for manual operation, thus improving ease of operation without compromising fixing reliability.
2Extent of automation
If automatic shrinking wearing is implemented, then the wearing process is automated, but the user must input head size information and repeatedly adjust until comfortable
Solution Approach 1:
The patent incorporates a sensor that detects the tightness of the strap around the user's head and provides feedback to the control module. Based on this feedback, the control module automatically adjusts the motor to achieve the optimal overlapping length of the telescopic arms. This closed-loop feedback mechanism eliminates the need for users to repeatedly adjust the strap manually, as the system autonomously achieves comfortable tightness based on sensor data, thereby reducing adjustment time while maintaining high automation.
Solution Approach 2:
The system performs self-adjustment by using the sensor to detect head size and tightness conditions, then automatically controlling the motor to adjust the strap. This self-service capability eliminates the need for user input and repeated manual adjustments, as the device autonomously determines the appropriate tightness and achieves it through automated motor control, significantly reducing the time required for proper fitting.
3Manufacturing precision
If the telescopic arm overlaps completely to achieve maximum tightness, then the fitting precision is improved, but the motor may lock up and cause damage
Solution Approach 1:
The patent applies preliminary anti-action by introducing a limiting mechanism that prevents the telescopic arms from overlapping beyond a predetermined safe position. The control module is configured to stop the motor before complete overlap occurs, based on predetermined overlapping length information. This preventive measure counteracts the potential harm of motor lock-up by ensuring the motor never reaches the dangerous position of complete overlap, thus maintaining motor reliability while still achieving precise fitting within safe limits.
Solution Approach 2:
The control module acts as an intermediary between the motor and the telescopic arm overlap process. It mediates the adjustment process by controlling the motor to stop at a predetermined position before complete overlap, preventing direct contact between the opposing ends of the telescopic arms. This intermediary control prevents motor lock-up while maintaining sufficient fitting precision through controlled, limited overlap.
Data Source
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AI summary
Provided are a head-mounted device support and a head-mounted device. The head-mounted device support includes a telescopic arm (11), a tightness adjustment mechanism (2), and a control module (3). The telescopic arm (11) has an initial length. The tightness adjustment mechanism (2) is connected to the telescopic arm (11) for use in adjusting the telescopic length of the telescopic arm (11). The control module (3) is electrically connected to the tightness adjustment mechanism (2), and controls the tightness adjustment mechanism (2) based on an adjustment signal to drive the telescopic arm (11) to move, so that the telescopic length is extended from the initial length or retracted to a target length. The head-mounted device support can improve the wearing convenience.