HMD Assistance Member Torque Hinge Head Shape Adaptation
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Solution Overview
Problem
Conventional head-mounted displays (HMDs) face challenges in maintaining stability and comfort across different head shapes, particularly when users tilt their heads, as existing mounting mechanisms fail to adequately distribute pressure and accommodate varying head sizes, leading to potential image displacement and discomfort.
Innovation Solution
A head-mounted apparatus featuring an abutment portion, a support member, and an assistance member connected via a torque hinge or ratchet mechanism, which allows the assistance member to move along the side of the face, distributing pressure and maintaining the image display unit's position, while also accommodating different head shapes and allowing use with glasses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rigid member having a shape suitable for a person having a large head is used, then the HMD can accommodate large heads, but if a person having a small head wears the HMD, the user is in a state where the HMD is supported by the front portion of the head and thus a space is formed on a side portion of the face, causing image displacement when the wearer tilts the head
Solution Approach 1:
The assistance member is configured to be movable relative to the abutment portion, allowing it to dynamically adjust its position according to the user's head shape and facial contours. This dynamic adjustment ensures stable support for users with different head sizes while maintaining proper image display unit positioning during head movements.
Solution Approach 2:
The assistance member acts as an intermediary element between the rigid abutment portion and the user's face. It mediates the interaction by providing adaptive contact that fills the space between the fixed abutment portion and the user's facial features, preventing image displacement while accommodating various head shapes.
2Adaptability or versatility
If a rigid member having a shape suitable for a person having a small head is used, then the HMD can fit small heads, but if a person having a large head wears the HMD, the area of a portion where the flexible member abuts the face of the wearer decreases, and a pressure applied to the head of the wearer increases, so that wearing comfort may decline
Solution Approach 1:
The assistance member's movable configuration allows it to dynamically adapt to different head sizes, expanding its contact area with users having large heads to distribute pressure evenly, and maintaining appropriate contact with users having small heads without excessive pressure.
Solution Approach 2:
The assistance member provides localized adaptive support at specific contact points on the face, allowing different regions to have different contact characteristics. This enables pressure distribution optimization for large heads while maintaining proper fit for small heads.
3Stability of the object's composition
If the HMD employs a rigid member, then the structure is stable, but the user may attempt to use the HMD and a pair of glasses together, but there is a case where the HMD and the pair of glasses cannot be used together because the rigid member interferes with the pair of glasses
Solution Approach 1:
The assistance member's movable design allows it to dynamically adjust its position to accommodate glasses, moving aside when glasses are present and returning to its support position when glasses are removed, thereby maintaining both structural stability and glasses compatibility.
Solution Approach 2:
The assistance member is positioned and configured in advance to anticipate the presence of glasses, allowing users to wear both the HMD and glasses simultaneously without interference, while still providing the necessary structural support for the HMD.
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 consistent comfort and stability regardless of head shape, reduces image displacement during head tilts, and enables simultaneous use with glasses by adjusting to individual facial contours, enhancing both usability and safety.
Implementation Method 1
an assistance member connected via a torque hinge or ratchet mechanism, which allows the assistance member to move along the side of the face
Implementation Method 2
an assistance member connected via a torque hinge or ratchet mechanism, which allows the assistance member to move along the side of the face
Data Source
AI summary
The present disclosure is directed to a head mounted apparatus that provides similar feeling in wearing, regardless of differences in head shape of users, and maintains stability of wearing even in a case where a user moves the head. A head mounted apparatus to be mounted on a head of a user includes a display unit configured to display an image to the user, an abutment portion disposed near the display unit and configured to abut the head of the user, a support member connected to the abutment portion and configured to hold a positional relationship between the abutment portion and the head of the user, and an assistance member movably connected to the abutment portion, and configured to abut a side portion of a face of the user and to assist support of the support member.