Head-Mounted Display Linkage Mechanism for Safe Removal
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Solution Overview
Problem
Conventional head-mounted display devices often cause inconvenience and risk of injury when removed from the user's head, as they may collide with glasses or skin, reducing usage willingness.
Innovation Solution
A head-mounted display device design featuring a wearable device, a display with guide grooves, and a linkage system that allows the display to slide away from the eyes and pivotally connect to the wearable device, preventing collisions and skin injury during removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display is tightly fitted on the user's face, then the display can contact and fit on the face properly, but the display may collide with glasses or rub against skin when removed
Solution Approach 1:
The patent implements a dynamic linkage mechanism connecting the display to the headband, allowing the display to move along a controlled trajectory during removal. The linkage device includes movable connections that enable the display to pivot and slide away from the face in a predetermined path, transforming the static fitted structure into a dynamic system that adapts during the removal process to avoid collision with glasses and skin.
Solution Approach 2:
The linkage device serves as an intermediary mechanism between the display and the headband. This intermediate structure includes guide grooves, movable connections, and linkage components that mediate the removal motion, guiding the display along a safe trajectory that prevents direct contact with the user's face and glasses during the transition from worn to removed state.
2Ease of operation
If the display is removed upward from the human head, then the display can be taken off, but it may collide with user's glasses or rub against skin
Solution Approach 1:
The linkage mechanism transforms the simple upward removal motion into a controlled dynamic trajectory. As the user pulls the display upward, the linkage device activates, causing the display to pivot at connection points and slide along guide grooves, creating a curved removal path that naturally avoids collision with glasses and skin while maintaining ease of operation.
Solution Approach 2:
The guide grooves and linkage structure are pre-configured to define a safe removal trajectory before the actual removal action occurs. The mechanical constraints are built into the structure in advance, so that when removal is initiated, the display automatically follows the predetermined safe path without requiring the user to perform additional actions to avoid collision.
3Object-affected harmful factors
If a linkage device is added to enable sliding motion, then collision with glasses is prevented, but device complexity increases
Solution Approach 1:
The linkage device is segmented into distinct functional components: guide grooves in the headband, movable connections at the display corners, and linkage arms. This segmentation allows each component to perform a specific function (guiding, connecting, moving) while keeping individual parts relatively simple in structure, reducing overall manufacturing complexity despite the added functionality.
Solution Approach 2:
The linkage device performs multiple functions simultaneously: it guides the removal trajectory, prevents collision with glasses, provides mechanical support during transition, and enables the sliding motion. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving comprehensive collision prevention.
Data Source
AI summary
A head-mounted display device includes a wearable device, a display and a linkage device. The wearable device is worn on a human head. The display includes a case for covering a human's eyes and face, and two guide grooves separately formed on the same side of the case. One end of the linkage device is slidably received within the guide grooves, the other end thereof is pivotally connected to the wearable device.