Head-mounted display device

Abstract

The application relates to a head-mounted display device, which relates to the technical field of display devices. The device comprises a display unit (5) for displaying a picture, a connecting unit (3) for positioning the display unit (5) in front of at least one eye of a user after the head-mounted display device is worn on the head of the user, a rotating shaft arm unit (4) comprising at least a first section (4-2-1), a second section (4-2-3) and a first adjusting member (4-4-1) connecting the first section (4-2-1) and the second section (4-2-3), the first section (4-2-1) being connected with the connecting unit (3), and the first adjusting member (4-4-1) being configured to change the relative position of the first section (4-2-1) and the second section (4-2-3) when subjected to external force, so that the second section (4-2-3) drives the display unit (5) to move to realize pupil distance adjustment. The device can meet the adjustment requirement of different pupil distance populations, thereby achieving better display effect.

Description

Technical Field

[0001] This disclosure relates to the field of display device technology, and more specifically to a head-mounted display device. Background Technology

[0002] With the rapid development of various 3D and AI technologies, a variety of display technologies have emerged in the market, such as AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality), and XR (Extended Reality).

[0003] However, although head-mounted display devices based on any of the above display technologies can display images, they cannot meet the needs of users with different interpupillary distances and need to be customized according to the user's interpupillary distance. Summary of the Invention

[0004] In view of the above problems, this disclosure provides a head-mounted display device that can be adjusted for people with different interpupillary distances to achieve better display effect.

[0005] This disclosure provides a head-mounted display device, including: a display unit for displaying an image; a connecting unit for positioning the display unit in front of at least one eye of the user after the head-mounted display device is worn on the user's head; and a pivot arm unit, including at least a first segment, a second segment, and a first adjusting member connecting the first segment and the second segment, wherein the first segment is connected to the connecting unit, and the first adjusting member is configured to change the relative position of the first segment and the second segment when subjected to an external force, such that the second segment drives the display unit to move to achieve interpupillary distance adjustment.

[0006] According to an embodiment of this disclosure, the pivot arm unit further includes a third segment, through which the second segment is connected to the display unit.

[0007] According to an embodiment of this disclosure, the pivot arm unit further includes a second adjusting member connected between the second segment and the third segment. The second adjusting member is configured to change the relative position between the second segment and the third segment when subjected to an external force, so that the third segment drives the display unit to move to achieve interpupillary distance adjustment.

[0008] According to embodiments of this disclosure, the first adjusting member includes a first flexible member, and / or the second adjusting member includes a second flexible member.

[0009] According to embodiments of this disclosure, the first segment includes a first rigid frame, the second segment includes a second rigid frame, and the pivot arm unit further includes a first flexible trim piece, the first flexible metal piece being configured to connect the first rigid frame and the second rigid frame through an internal through-hole of the first flexible trim piece.

[0010] According to an embodiment of this disclosure, the third segment includes a third rigid frame, and the pivot arm unit further includes a second flexible trim piece, the second flexible metal piece being configured to connect the second rigid frame and the third rigid frame through an internal through-hole in the second flexible trim piece.

[0011] According to an embodiment of this disclosure, the pivot arm unit further includes a third flexible trim piece, the first end of which is connected to the first rigid frame, the second end of which is connected to the third rigid frame, and the middle portion located between the first end and the second end is connected to the second rigid frame.

[0012] According to embodiments of this disclosure, the first adjusting member includes a first rotating shaft, and / or the second adjusting member includes a second rotating shaft.

[0013] According to embodiments of this disclosure, the first or second rotating axis includes: a rotating shaft that rotates about an axis or a ball axis that rotates in any direction, wherein the axis is perpendicular to the line connecting the pupils of both eyes.

[0014] According to embodiments of this disclosure, it further includes: a third rotation axis for connecting the connecting unit and the rotating arm unit, the rotating arm unit being configured to rotate about the third rotation axis to adjust its relative position with the connecting unit.

[0015] According to an embodiment of this disclosure, the first segment includes a second shaft hole and a first limiting groove, and the third rotating shaft includes: a first shaft cover including a first limiting protrusion, the first limiting protrusion cooperating with the first limiting groove; a second rotating shaft frame including a first side and a second side, wherein a first rotating shaft portion is provided on the second side, wherein the first side is connected to the connecting unit, and the first rotating shaft portion is configured to be connected to the first shaft cover via the second shaft hole.

[0016] According to an embodiment of this disclosure, the third rotating shaft further includes: a first shim, sleeved on the first rotating shaft portion, for lubrication and / or noise reduction when the first segment rotates around the first rotating shaft portion; and / or a second shim, sleeved on the first rotating shaft portion, for damping adjustment when the first segment rotates around the first rotating shaft portion.

[0017] According to embodiments of this disclosure, it further includes: a fourth rotation axis for connecting the pivot arm unit and the display unit, the pivot arm unit being configured to rotate about the fourth rotation axis to adjust its relative position with the display unit.

[0018] According to an embodiment of this disclosure, the third segment of the pivot arm unit includes a third shaft hole and a second limiting protrusion, the adapter housing of the display unit includes a fourth shaft hole and a second limiting groove, the fourth rotating shaft includes: a second shaft cover; a third pivot frame including a second pivot portion, wherein the second pivot portion passes through the third shaft hole and the fourth shaft hole and is connected to the second shaft cover, and the second limiting protrusion cooperates with the second limiting groove.

[0019] According to an embodiment of this disclosure, the fourth rotating shaft further includes: a third shim, sleeved on the second rotating shaft portion, for lubrication and / or noise reduction when the third segment rotates around the second rotating shaft portion; and / or a fourth shim, sleeved on the second rotating shaft portion, for damping adjustment when the third segment rotates around the second rotating shaft portion.

[0020] According to embodiments of this disclosure, it further includes: a main control box unit for capturing images and communicatively connected to the display unit; and a sixth rotation axis connecting the main control box unit and the connection unit, wherein the main control box unit is configured to rotate around the sixth rotation axis to adjust the shooting angle.

[0021] According to an embodiment of this disclosure, the rear cover of the main control box unit includes a third limiting groove and a fifth shaft hole, and the sixth rotating shaft includes: a third shaft cover, including a third limiting protrusion, the third limiting protrusion cooperating with the third limiting groove; and a fourth rotating shaft frame, including a third side and a fourth side, wherein a third rotating shaft portion is provided on the fourth side, wherein the third side is connected to the connecting unit, and the third rotating shaft portion is configured to be connected to the third shaft cover via the fifth shaft hole.

[0022] According to embodiments of this disclosure, the sixth rotating axis further includes:

[0023] A fifth gasket is disposed between the third shaft cover and the rear cover; and / or a sixth gasket is sleeved on the third rotating shaft portion for lubrication and / or noise reduction when the main control box unit rotates around the third rotating shaft portion; and / or a seventh gasket is sleeved on the third rotating shaft portion for damping adjustment when the main control box unit rotates around the third rotating shaft portion.

[0024] According to an embodiment of this disclosure, the connecting unit includes a ring headband, and the headwear unit includes a safety helmet, the ring headband being fitted onto the safety helmet.

[0025] According to an embodiment of this disclosure, the protrusion of the annular headband is inserted into the groove of the safety helmet.

[0026] According to an embodiment of this disclosure, the connecting unit further includes a fastener, which is used to pass through the annular headband and contact the safety helmet when the annular headband is fitted onto the safety helmet. Attached Figure Description

[0027] The foregoing contents, as well as other objects, features, and advantages of this disclosure, will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0028] Figure 1 A schematic front view of a head-mounted display device in use according to an embodiment of the present disclosure is shown.

[0029] Figure 2 A top view schematically illustrating a head-mounted display device in use according to an embodiment of the present disclosure;

[0030] Figure 3 A schematic left view of a head-mounted display device in use according to an embodiment of the present disclosure is shown;

[0031] Figure 4 A rear view schematically illustrating a head-mounted display device in use according to an embodiment of the present disclosure;

[0032] Figure 5 A schematic front view of a head-mounted display device in a folded state according to an embodiment of the present disclosure is shown;

[0033] Figure 6 An exploded view of a pivot arm unit according to an embodiment of the present disclosure is shown schematically;

[0034] Figure 7 A schematic diagram of the structure of a pivot arm unit according to another embodiment of the present disclosure is shown.

[0035] Figure 8 A schematic diagram of the structure of a pivot arm unit according to another embodiment of the present disclosure is shown.

[0036] Figure 9 An illustration of interpupillary distance adjustment diagram according to an embodiment of the present disclosure is shown schematically;

[0037] Figure 10 An exploded view schematically illustrating the third and fourth rotation axes according to embodiments of the present disclosure;

[0038] Figure 11 A schematic diagram illustrating the structure of a third rotation axis and a fourth rotation axis according to another embodiment of the present disclosure is shown.

[0039] Figure 12 An exploded view of the main control box unit according to an embodiment of the present disclosure is shown schematically;

[0040] Figure 13 An exploded view schematically illustrates a sixth rotation axis according to an embodiment of the present disclosure;

[0041] Figure 14 An exploded view of a display unit according to an embodiment of the present disclosure is shown schematically;

[0042] Figure 15 An exploded view schematically illustrates a connection unit according to an embodiment of the present disclosure;

[0043] Figure 16 An assembly diagram of a ring-shaped headband and a safety helmet according to an embodiment of the present disclosure is shown schematically;

[0044] It should be noted that, for clarity, the dimensions of the overall / partial structure or the overall / partial region in the drawings used to describe the embodiments of this disclosure may be enlarged or reduced, i.e., these drawings are not drawn to actual scale. Detailed Implementation

[0045] The embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the present disclosure for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0046] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0047] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0048] When using expressions such as "at least one of A, B, and C", they should generally be interpreted in accordance with the meaning that is commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B, and C, etc.).

[0049] Figure 1 A schematic front view of a head-mounted display device in use according to an embodiment of the present disclosure is shown. Figure 2 A top view schematically illustrates a head-mounted display device in use according to an embodiment of the present disclosure. Figure 3 A schematic left view of a head-mounted display device in use according to an embodiment of the present disclosure is shown. Figure 4 A rear view schematically illustrates a head-mounted display device in use according to an embodiment of the present disclosure. Figure 5 The diagram schematically shows a front view of a head-mounted display device in a folded state according to an embodiment of the present disclosure. Figure 6 An exploded view of a pivot arm unit according to an embodiment of the present disclosure is shown schematically.

[0050] Reference Figures 1 to 6 The head-mounted display device of this disclosure includes a connecting unit 3, a pivot arm unit 4, and a display unit 5. The display unit 5 is used to display an image. The connecting unit 3 is used to position the display unit 5 in front of at least one of the user's eyes after the head-mounted display device is worn on the user's head. The pivot arm unit 4 includes at least a first segment 4-2-1, a second segment 4-2-3, and a first adjusting member 4-4-1 connecting the first segment 4-2-1 and the second segment 4-2-3. The first segment 4-2-1 is connected to the connecting unit 3. The first adjusting member 4-4-1 is configured to change the relative position of the first segment 4-2-1 and the second segment 4-2-3 when subjected to an external force, so that the second segment 4-2-3 drives the display unit 5 to move to achieve interpupillary distance adjustment.

[0051] In other embodiments, reference is made to Figure 6 The first paragraph can correspond to Figure 6 Part 4-2-3, and the second paragraph can correspond to... Figure 6 Part 4-2-2. The first adjusting component can correspond to... Figure 6 Section 4-4-2. In other words, when the rotating arm unit includes the first section, the second section, and the first adjusting component, the positions of the three components can be changed according to actual needs.

[0052] For ease of understanding, the following description will further focus on the first segment 4-2-1, the second segment 4-2-3, and the first adjusting element 4-4-1 that connects the first segment 4-2-1 and the second segment 4-2-3.

[0053] According to embodiments of this disclosure, a pivot arm unit 4, comprising at least a first segment 4-2-1, a second segment 4-2-3, and a first adjusting member 4-4-1 connecting the first segment 4-2-1 and the second segment 4-2-3, can be used to change the relative positions of the first segment 4-2-1 and the second segment 4-2-3 during interpupillary distance adjustment. This causes the second segment 4-2-3 to move, thereby moving the display unit 5. During the movement of the display unit 5, its position relative to the viewer's eye changes, enabling adjustment for different users with varying interpupillary distances and achieving a better display effect.

[0054] In some embodiments, the pivot arm unit 4 further includes a third segment 4-2-2, and the second segment 4-2-3 is connected to the display unit 5 through the third segment 4-2-2.

[0055] For example, the second segment 4-2-3 and the third segment 4-2-2 can be directly connected, such as by bonding or welding, or by detachable connection (direct snap-fit ​​or bolt connection). Designing the pivot arm unit 4 as a multi-segment structure including at least the first segment 4-2-1, the second segment 4-2-3, and the third segment 4-2-2 can improve the design flexibility of the overall structure of the pivot arm unit 4.

[0056] In some embodiments, the second segment 4-2-3 and the third segment 4-2-2 may be provided with adjusting members. Specifically, the rotating arm unit 4 further includes a second adjusting member 4-4-2, which is connected between the second segment 4-2-3 and the third segment 4-2-2. The second adjusting member 4-4-2 is configured to change the relative position between the second segment 4-2-3 and the third segment 4-2-2 when subjected to an external force, so that the third segment 4-2-2 drives the display unit 5 to move to achieve interpupillary distance adjustment.

[0057] According to embodiments of this disclosure, by designing at least a first segment 4-2-1, a second segment 4-2-3, and a third segment 4-2-2, and providing an adjustment member between any two segments, such as a first adjustment member 4-4-1 and a second adjustment member 4-4-2, multiple adjustment positions can be provided to the user, making it easier for the user to adjust the interpupillary distance using at least one adjustment member, which is more convenient.

[0058] It should be noted that the rotating arm units of the first, second, and third segments, the first adjusting member, and the second adjusting member described above are merely schematic structures of this disclosure. More segments can be added, and it can be flexibly decided whether to add new adjusting members.

[0059] In some embodiments, the first adjusting member 4-4-1 includes a first flexible member, and / or the second adjusting member 4-4-2 includes a second flexible member. The flexible member comprises a flexible element that may have low stiffness in multiple directions and can deform under external force. The user can deform the first and / or second flexible members by applying force to them, thereby moving the display unit 5.

[0060] In some embodiments, the first flexible member includes a first flexible metal member, and / or the second flexible member includes a second flexible metal member, wherein the first flexible metal member or the second flexible metal member deforms when subjected to an external force.

[0061] For example, the flexible metal part (the first flexible metal part or the second flexible metal part) may include materials such as copper, iron, aluminum or alloys.

[0062] In some embodiments, the flexible metal element may include a shape that can be bent and deformed relative to the position of the human eye, such as a strip, like a metal rod or wire. In other embodiments, the flexible metal element may be sheet-like, such as a rectangular metal sheet.

[0063] In some embodiments, the flexible metal element is telescopic along its length (e.g., the extension direction of the pivot arm unit 4 from the connecting unit to the display unit). For example, the flexible metal element may be a multi-segmented telescopic metal rod, allowing the user to adjust the length of the pivot arm unit by extending or retracting it. (See also...) Figures 1 to 5 To accommodate different user head sizes, the retractable design allows for adjustment of the relative position between the user's eyes and the display unit. Furthermore, the retractable design also reduces the overall size of the hinge arm unit 4, making it easier to fold and store.

[0064] In some embodiments, the pivot arm unit 4 includes a pivot arm frame 4-2, such as a first rigid frame 4-2-1, a second rigid frame 4-2-3, and a third rigid frame 4-2-2. Exemplarily, the pivot arm frame 4-2 can be rigid, for example... Figure 6 The central pivot arm frame 4-2 has greater rigidity than other flexible components, making it less prone to deformation when the user adjusts the interpupillary distance.

[0065] Reference Figure 6 The first segment 4-2-1 includes a first rigid frame 4-2-1, the second segment 4-2-3 includes a second rigid frame 4-2-3, and the pivot arm unit 4 also includes a first flexible trim 4-3-1. The first flexible metal part is configured to pass through the internal through hole (not shown) of the first flexible trim 4-3-1 to connect the first rigid frame 4-2-1 and the second rigid frame 4-2-3.

[0066] In some embodiments, the third segment 4-2-2 includes a third rigid frame 4-2-2, and the pivot arm unit 4 also includes a second flexible trim 4-3-2. The second flexible metal part is configured to connect the second rigid frame 4-2-3 and the third rigid frame 4-2-2 through an internal through hole (not shown) of the second flexible trim 4-3-2.

[0067] In some embodiments, the pivot arm unit 4 further includes a third flexible trim 4-1, the first end 4-1-1 of which is connected to the first rigid frame 4-2-1, the second end 4-1-2 of which is connected to the third rigid frame 4-2-2, and the middle part located between the first end and the second end is connected to the second rigid frame 4-2-3.

[0068] Reference Figure 6 Surface A is parallel to Surface B. The relative connection may include connecting the contours of the pivot arm frame 4-2 and the third flexible trim 4-1 that match each other. After the connection, the normal of Surface A is parallel to the normal of Surface B.

[0069] For example, the materials of the first flexible trim 4-3-1, the second flexible trim 4-3-2 and the third flexible trim 4-1 may include rubber.

[0070] In some embodiments, refer to Figure 6 Taking flexible metal parts as an example, the first flexible metal part passes through the through hole of the first flexible ornament 4-3-1, and the second flexible metal part passes through the through hole of the second flexible ornament 4-3-2, connecting the various parts of the pivot arm frame 4-2 in series and fixing them with glue. Finally, the third flexible ornament 4-1 is glued to the connected pivot arm frame 4-2. The pivot arm assembly is complete.

[0071] According to embodiments of this disclosure, the pivot arm frame 4-2 is connected to the first flexible trim 4-3-1 and the second flexible trim 4-3-2 via flexible components (such as metal wires). Therefore, while ensuring a certain strength, the pivot arm unit 4 can also bend slightly to the left or right (relative to the human eye position) in the direction normal to surface A, to meet the needs of people with different interpupillary distances. Simultaneously, due to the 3+2 multi-segment structure of the pivot arm unit 4 (the three parts of the pivot arm frame 4-2 and the two flexible components), the display state of the display unit 5 is maintained when the pivot arm is bent.

[0072] In some embodiments, to distinguish it from a flexible component design, the first adjusting member 4-4-1 includes a first rotating axis, and / or the second adjusting member 4-4-2 includes a second rotating axis. In some embodiments, the first or second rotating axis includes: a rotating shaft that rotates about an axis or a ball axis that rotates in any direction, wherein the axis of the rotating shaft is perpendicular to the line L connecting the pupils of both eyes. The following describes... Figure 7 and Figure 8Expand description.

[0073] Figure 7 A schematic diagram of the structure of a pivot arm unit according to another embodiment of the present disclosure is shown.

[0074] Reference Figure 7 The pivot arm unit 4 includes a first segment 4-2-1, a second segment 4-2-3, and a first adjusting member 4-4-1 connecting the first segment 4-2-1 and the second segment 4-2-3. In addition, the pivot arm unit 4 may also include a flexible outer skin 7-1 that wraps around the first segment 4-2-1, the second segment 4-2-3, and the first adjusting member 4-4-1.

[0075] For example, the first segment 4-2-1 and the second segment 4-2-3 may be rigid frames, and the first rotation axis may include a rotating shaft that rotates about an axis or a ball shaft that rotates about any direction.

[0076] For example, when a user adjusts their interpupillary distance, if the first rotation axis is a pivot that rotates around an axis, the pivot can be rotated, causing the second segment 4-2-3 to move the display unit 5 to a suitable position. If the first rotation axis is a spherical axis that rotates in any direction, in addition to moving the display unit 5 left and right, it can also move it forward and backward relative to the user's eyes along the vertical line L.

[0077] Figure 8 A schematic diagram of the structure of a pivot arm unit according to another embodiment of the present disclosure is shown.

[0078] Reference Figure 8 The pivot arm unit 4, in addition to including the first segment 4-2-1, the second segment 4-2-3, and the first adjusting member 4-4-1 connecting the first segment 4-2-1 and the second segment 4-2-3, may also include a third segment 4-2-2 and a second adjusting member 4-4-2 connecting the second segment 4-2-3 and the third segment 4-2-2. Furthermore, the flexible outer skin 7-1 can wrap around the first segment 4-2-1, the second segment 4-2-3, the third segment 4-2-2, the first adjusting member 4-4-1, and the second adjusting member 4-4-2.

[0079] For example, the third segment 4-2-2 can be a rigid frame, and the second rotation axis can include a rotating shaft that rotates about an axis or a ball shaft that rotates about any direction.

[0080] For example, when a user adjusts their interpupillary distance, if the second rotation axis is a pivot that rotates around an axis, the pivot can be rotated, causing the third segment 4-2-2 to move the display unit 5 to a suitable position. If the second rotation axis is a spherical axis that rotates in any direction, in addition to moving the display unit 5 left and right, it can also move it forward and backward relative to the user's eyes along a direction perpendicular to line L.

[0081] It should be noted that the first and second rotating axes can have the same structure, such as both being rotating shafts or both being ball shafts. Alternatively, the first and second rotating axes can have different structures, such as one being a rotating shaft and the other a ball shaft. Users can choose to use the first and / or second rotating axes according to their needs.

[0082] In some embodiments, refer to Figures 6 to 8 When the pivot arm unit 4 has two or more adjusting components, the flexible component and the rotating shaft can be used in combination. For example, the first adjusting component 4-4-1 is a flexible component, and the second adjusting component 4-4-2 is a rotating shaft. Further, the second adjusting component 4-4-2 can be a rotating shaft that rotates around an axis or a ball shaft that rotates in any direction. Alternatively, the first adjusting component 4-4-1 can be a rotating shaft, and the second adjusting component 4-4-2 can be a flexible component. Further, the first adjusting component 4-4-2 can be a rotating shaft that rotates around an axis or a ball shaft that rotates in any direction. This allows for more interpupillary distance adjustment methods.

[0083] Figure 9 An illustration of interpupillary distance adjustment diagram according to an embodiment of the present disclosure is shown.

[0084] Due to differences in interpupillary distance among users, the optical engine display area needs to be aligned directly in front of the eyeball, and the interpupillary distance of most users is concentrated between 63±5mm. Therefore, during use, the interpupillary distance of the optical engine can be adjusted simply by slightly bending the conversion arm unit 4 to the left or right. Figure 9 The diagram illustrates adjustments for interpupillary distances of 58mm, 63mm, and 68mm. For example, the initial state of the rotating arm unit 4 is suitable for a user with an interpupillary distance of 63mm. When used by a user with an interpupillary distance of 58mm, the display unit 5 can be moved to the right relative to the initial state. When used by a user with an interpupillary distance of 63mm, the display unit 5 can be moved to the left relative to the initial state. This achieves stepless adjustment of the interpupillary distance.

[0085] When the pivot arm unit 4 adopts a multi-segment structure design, such as the 3+2 multi-segment structure described above, the pivot arm unit 4 can keep the display unit 5 in a horizontal state when bending, for example... Figure 9 (a) and Figure 9 In (c), by bending the two adjusting parts, the relative position between the third segment and the display unit 5 remains unchanged.

[0086] Figure 10 An exploded view schematically illustrating the third and fourth rotation axes according to embodiments of the present disclosure.

[0087] Reference Figures 1 to 5 ,as well as Figure 10In some embodiments, the head-mounted display device further includes a third rotation axis 7 for connecting the connection unit 3 and the pivot arm unit 4, the pivot arm unit 4 being configured to rotate about the third rotation axis 7 to adjust its relative position with respect to the connection unit 3.

[0088] Reference Figure 10 The first segment 4-2-1 includes a second shaft hole 10-2-1 and a first limiting groove 10-2-2. The connecting unit 3 includes a first shaft hole 3-1-2 and a first rotating shaft frame 3-1-4. The third rotating shaft 7 mainly includes a first shaft cover 4-5, a second rotating shaft frame 3-10, a first gasket 2-12-1, and / or a second gasket 2-12-2. The first shaft cover 4-5 includes a first limiting protrusion 4-5-1, which cooperates with the first limiting groove 10-2-2. The second rotating shaft frame 3-10 includes a first side (near the connecting unit 3) and a second side (near the first segment 4-2-1). A first rotating shaft portion is provided on the second side. The first side is connected to the connecting unit 3, and the first rotating shaft portion is configured to be connected to the first shaft cover 4-5 via the second shaft hole 10-2-1. Specifically, the data cable 10-1 enters the shaft arm unit 4 through the first shaft hole 3-1-2 and the second shaft hole 10-2-1. During assembly, the first limiting protrusion 4-5-1 of the first shaft cover 4-5 is inserted into the first limiting groove 10-2-2. The first shaft cover 4-5, the first shaft frame 3-1-4, the second shaft frame 3-10, the first washer 2-12-1, and / or the second washer 2-12-2 are fixed together with screws. This ultimately forms a third rotating shaft with angle limitation (limited by the first limiting groove 10-2-2).

[0089] Reference Figure 10 The first gasket 2-12-1 is fitted onto the first rotating shaft and is used for lubrication and / or noise reduction when the first segment 4-2-1 rotates around the first rotating shaft; and / or the second gasket 2-12-2 is fitted onto the first rotating shaft and is used for damping adjustment when the first segment rotates around the first rotating shaft. Figure 10 The positions of the first gasket 2-12-1 and the second gasket 2-12-2 can be interchanged.

[0090] Reference Figures 1 to 5 ,as well as Figure 10 In some embodiments, the head-mounted display device further includes a fourth rotation axis 8 for connecting the pivot arm unit 4 and the display unit 5, the pivot arm unit 4 being configured to rotate about the fourth rotation axis 8 to adjust its relative position with respect to the display unit 5.

[0091] Reference Figure 10The third segment 4-2-2 includes a third shaft hole 10-2-3 and a second limiting protrusion 4-2-4. The adapter shell 5-1 of the display unit 5 includes a fourth shaft hole 5-1-1 and a second limiting groove 5-1-2. The fourth rotating shaft 8 mainly includes a second shaft cover 4-6, a third rotating shaft frame 5-10, a third gasket 2-12-3, and / or a fourth gasket 2-12-4. Specifically, the data cable 10-1 enters the display unit 5 through the third shaft hole 10-2-3 and the fourth shaft hole 5-1-1. During assembly, the second rotating shaft portion of the third rotating shaft frame 5-10 passes through the fourth shaft hole 5-1-1 and the third shaft hole 10-2-3, and the second limiting protrusion 4-2-4 is inserted into the second limiting groove 5-1-2 for mutual cooperation. The second shaft cover 4-6, the third rotating shaft frame 5-10, the third gasket 2-12-3, and / or the fourth gasket 2-12-4 are fixed together with screws. This ultimately forms a fourth rotation axis 8 with angular limitations.

[0092] Reference Figure 10 The third shim 2-12-3 is fitted onto the second rotating shaft and is used for lubrication and / or noise reduction when the third segment 4-2-2 rotates around the second rotating shaft; and / or the fourth shim 2-12-4 is fitted onto the second rotating shaft and is used for damping adjustment when the third segment 4-2-2 rotates around the second rotating shaft. Figure 10 The positions of the third gasket 2-12-3 and the fourth gasket 2-12-4 can be interchanged.

[0093] According to embodiments of this disclosure, the multi-axis design utilizing the third rotating axis 7 and / or the fourth rotating axis 8 allows for convenient storage of the display unit 5 and enables easy switching of usage states (e.g., ...). Figures 1 to 5 ).

[0094] In some embodiments, the third rotation axis 7 or the fourth rotation axis 8 includes the above-described components. Figure 10 The structure shown can also be configured as a spherical axis that rotates in any direction. The following will illustrate this... Figure 11 The case where both the third rotation axis 7 and the fourth rotation axis 8 are ball shafts is further described.

[0095] Figure 11 A schematic diagram of the structure of a third rotation axis and a fourth rotation axis according to another embodiment of the present disclosure is shown.

[0096] like Figure 11 As shown, the user can use the third rotation axis 7 and the fourth rotation axis 8 to achieve the following: Figure 10 The function of the rotating structure shown is, for example, to move the display unit 5 to, as Figure 5 The folded state.

[0097] In some embodiments, the pivot arm unit 4 can be entirely rigid, and the user can use the third rotation axis 7 (such as a ball joint) to rotate to drive the display unit 5 to move through the pivot arm unit 4, thereby achieving interpupillary distance adjustment.

[0098] In some embodiments, the pivot arm unit 4 may also be a multi-segment structure as described above. Users can flexibly select the pivot arm unit 4 and / or the third rotating axis 7 to drive the display unit 5 to move, thereby achieving interpupillary distance adjustment.

[0099] In particular, it should be noted that for the third rotation axis 7 and the fourth rotation axis 8, Figure 10 The structure shown and Figure 11 The ball shaft structures shown can be used in combination, such as one being a rotating shaft and the other a ball shaft.

[0100] Figure 12 An exploded view of the main control box unit according to an embodiment of the present disclosure is shown schematically. Figure 13 An exploded view of the sixth rotation axis according to an embodiment of the present disclosure is shown schematically.

[0101] In some embodiments, the head-mounted display device further includes a main control box unit 2 and a sixth rotation axis 6. The main control box unit 2 is used to capture images and is communicatively connected to the display unit 5. The sixth rotation axis 6 connects the main control box unit 2 and the connection unit 3, and the main control box unit 2 is configured to rotate about the sixth rotation axis 6 to adjust the shooting angle.

[0102] Reference Figure 12 The main control box unit 2 includes a front cover 2-1, a heat sink 2-2, a middle shell 2-3, a rear cover 2-4, a hardware module 2-5, a fourth flexible decorative part 2-6, a first lens 2-7, a second lens 2-8, a first rubber plug 2-9, and a button pad 2-10. The main control box unit 2 primarily realizes functions including image acquisition, remote communication, human-computer interaction, and information processing. The heat sink 2-2 is attached to the motherboard chip, dispersing the chip's heat through efficient heat conduction to prevent overheating and affecting the overall machine's operation. The hardware module 2-5 mainly includes: an infrared camera module, a visible light camera module, a WIFI module, a 4G / 5G module, a motherboard module, a speaker, a microphone, buttons, and an adapter FPC. Lens 12-7 is the lens for the visible light camera; the material can be ordinary transparent materials such as transparent PC, acrylic, and glass. Lens 22-8 is the lens for the infrared camera; the material is a custom material that transmits specific light wavelengths, such as germanium glass. The first rubber stopper 2-9 is a sealing stopper for the SD card slot, which serves to prevent dust and water damage.

[0103] For example, when assembling the main control box unit 2, the button pad 2-10, the first lens 2-7, and the second lens 2-8 are respectively bonded to the corresponding positions of the middle shell 2-3. The hardware module 2-5 is fixed to the rear cover 2-4 with screws. Then, the middle shell 2-3 and the rear cover 2-4 are assembled together, and the data cable is led out through the fifth shaft hole 2-4-1. The heat sink 2-2 is fastened to the middle shell 2-3 with screws. The front cover 2-1 is fixed to the middle shell 2-3 with clips. Finally, the first rubber plug 2-9 and the fourth flexible trim 2-6 are installed in the corresponding positions of the main control box unit 2, and the main control box unit assembly is completed.

[0104] Reference Figure 13 The rear cover 2-4 may include a fifth shaft hole 2-4-1 and a third limiting groove 2-4-2. The sixth rotating shaft 6 mainly includes a third shaft cover 2-11, a fourth rotating shaft frame 3-1-3, and at least one of a fifth gasket 2-12-5, a sixth gasket 2-12-6, and a seventh gasket 2-12-7. Specifically, the data cable 10-1 passes through the fifth shaft hole 2-4-1 and the central shaft hole of the fourth rotating shaft frame to enter the connecting unit 3. The third shaft cover 2-11 includes a third limiting protrusion 2-11-1. During assembly, the third side of the fourth rotating shaft frame 3-1-3 is fixedly connected to the connecting unit 3. The fourth side is provided with a third rotating shaft part (close to the back cover 2-4, away from the connecting unit 3). The third rotating shaft part passes through the fifth shaft hole 2-4-1, and the third limiting protrusion 2-11-1 of the third shaft cover 2-11 is inserted into the third limiting groove 2-4-2 of the back cover 2-4 of the main control box to cooperate. Then, at least one of the fifth gasket 2-12-5, the sixth gasket 2-12-6, and the seventh gasket 2-12-7 is placed in the corresponding position. The third shaft cover 2-11, the back cover 2-4, and the fourth rotating shaft frame 3-1-3 are connected together with screws to finally form a sixth rotating shaft 6 with angle limitation.

[0105] Reference Figure 13 The fifth shim 2-12-5 is positioned between the third shaft cover 2-11 and the rear cover 2-4 (for lubrication or damping adjustment); and / or the sixth shim 2-12-6 is fitted onto the third rotating shaft for lubrication and / or noise reduction when the main control box unit 2 rotates around the third rotating shaft; and / or the seventh shim 2-12-7 is fitted onto the third rotating shaft for damping adjustment when the main control box unit 2 rotates around the third rotating shaft. The positions of the sixth shim 2-12-6 and the seventh shim 2-12-7 can be interchanged.

[0106] According to embodiments of this disclosure, the sixth rotation axis 6 includes a rotating shaft that rotates about an axis or a ball axis that rotates in any direction, wherein the axis is perpendicular to the line connecting the pupils of both eyes. The main control box unit 2 and the connection unit 3 are connected to change the image acquisition direction of the camera.

[0107] It should be noted that the positions of the main control box unit 2 and the sixth rotating axis 6 are not limited to... Figures 1 to 5 As shown, the connection positions of the main control box unit 2 and the sixth rotating shaft 6 with the connecting unit 3 can be moved according to actual needs, for example, on the rear side of the safety helmet, or on the side opposite to the rotating shaft arm unit 4.

[0108] Figure 14 An exploded view of a display unit according to an embodiment of the present disclosure is shown schematically.

[0109] like Figure 14 As shown, display unit 5 can be an optical engine unit. For example, display unit 5 includes an adapter housing 5-1, an optical engine housing 5-2, a cover plate 5-3, a gasket 5-4, an optical engine 5-5, an optical lens 5-6, a lens housing 5-7, a photochromic lens 5-8, and a bridge plate 5-9. The optical engine 5-5 includes optical engine structural components, a lens group, and a Micro OLED display module. The optical engine structural components are high-precision components, requiring the lens assembly tolerance to be less than 0.02mm. The optical lens 5-6 is an optical waveguide used for image display. The photochromic lens 5-8 can adjust its transmittance in real time according to the ambient brightness to ensure the optical engine image is clearly visible even in bright outdoor environments, thus guaranteeing the display quality. Because the optical solution used is a multi-piece optical waveguide solution to work with the Micro OLED module, the optical engine is very compact and lightweight, weighing approximately 20g (for example only).

[0110] In some embodiments, when assembling the display unit 5, firstly, the optical engine 5-5 and the optical engine lens 5-6 are assembled together and fixed with glue. The optical lens 5-6 and the photochromic lens 5-8 are then installed together into the lens housing 5-7. The optical engine 5-5 and the photochromic lens 5-8 are respectively connected to the corresponding connectors on the Bridge plate 5-9. Simultaneously, the wire leading out through the sixth shaft hole 5-1-1 is passed through hole 5-2-1 and connected to the Bridge plate 5-9. Then, the optical engine 5-5 and the Bridge plate 5-9 are installed together into the optical engine housing 5-2, and the cover plate 5-3 is fixed to the optical engine housing 5-2 with screws. Finally, a gasket 5-4 is placed between the adapter housing 5-1 and the optical engine housing 5-2 and connected together with screws (such as a fixed connection or a rotatable connection), completing the assembly.

[0111] In some embodiments, the display unit 5 includes a fifth rotation axis (e.g., disposed between the adapter housing 5-1 and the optical engine housing 5-2, not shown in the figure) for adjusting the display angle of the display unit relative to the human eye during rotation. The fifth rotation axis may include a pivot rotating about an axis or a ball axis rotating in any direction, wherein the axis is perpendicular to the line connecting the pupils of both eyes. For example, when adjusting the display angle, the user can rotate the fifth rotation axis (e.g., rotate the optical engine housing 5-2 about the axis of the shim 5-4) to move the image displayed by the optical lens 5-6 back and forth or up and down relative to the human eye.

[0112] In some embodiments, the connecting unit 3 can be worn in direct contact with the user's head. The connecting unit 3 has a shape adapted to the user's head contour, such as a ring headband, a notched ring headband, a strap, a headband, or a portion of an eyeglass frame that contacts the user's head.

[0113] In some other embodiments, the head-mounted display device further includes a head-mounted unit 1, which is described below. Figure 15 and Figure 16 Further explanation of headgear unit 1 and connection unit 3.

[0114] Figure 15 An exploded view of a connection unit according to an embodiment of the present disclosure is shown schematically. Figure 16 An assembly diagram of a ring-shaped headband and a safety helmet according to an embodiment of the present disclosure is shown schematically.

[0115] Reference Figures 1 to 5 , Figure 15 and Figure 16 In some embodiments, the connecting unit 3 is used to connect to the headgear unit 1. The headgear unit 1 includes a hat-type unit, such as a safety helmet, which can be fitted onto the safety helmet when the connecting unit 3 is a ring-shaped headband.

[0116] In some embodiments, the headgear unit 1 has a shape adapted to the user's head and is worn directly on the head by the user, and is not limited to a hat-style design. When the headgear unit 1 has a shape adapted to the overall shape of the user's head, it can cover the top of the head, such as a helmet, hood, or similar structure. When the headgear unit 1 has a shape adapted to the user's forehead area, it can be a headband or similar structure. When the headgear unit 1 has a shape adapted to the user's facial area, it can be a full-coverage mask structure or a mask structure covering a portion of the facial area. In addition, the headgear unit 1 may also include a clamping structure, such as an eyeglass temple type or having other clamping parts. In this case, the connection form between the connecting unit 3 and the headgear unit 1 is not limited to being sleeved on the headgear unit 1.

[0117] For example, after the ring-shaped headband is fitted onto the headwear unit 1, the user can wear the headwear unit 1 on their head. (Refer to...)Figures 1 to 5 The headband unit 1 directly contacts the user's head. The main unit 2 is connected to the connecting unit 3 and located on one side of the head (left or right). The connecting unit 3, configured as a headband, is located on top of the user's head. One end of the rotating arm unit 4 is connected to the connecting unit 3, and the other end is connected to the display unit 5. If the display unit 5 is in a certain position when the user is wearing it... Figure 5 The user can move the pivot arm unit 5 to the position shown, and then move the display unit 5 to the position shown. Figure 1 The front of the face is shown, as in front of the eyes when viewing display unit 5. Continue referring to... Figure 9 Even if the display unit 5 is in front of the user's eyes, it may not be adapted to the user's interpupillary distance. In this case, the user can adjust the display unit 5 to be directly in front of the user's eyes by bending the pivot arm unit 5 to the left or right through at least one adjusting member of the pivot arm unit 5.

[0118] It should be noted that, although Figures 1 to 5 Only a single pivot arm unit 4 and display unit 5 are provided. When needed, at least one of the pivot arm unit 4 and display unit 5 can be configured as two. For example, display unit 5 can be a dual-optical-machine interface located in front of the user's eyes. Another example is... Figure 1 On the other side, add a rotating arm unit 4 and a display unit 5 with the same structure.

[0119] According to embodiments of this disclosure, the head-mounted display device can be applied in industrial fields. For example, construction site users can wear a safety helmet while viewing images using the display unit 5. These images can be displayed based on display technologies such as AR, VR, MR, and XR. The ring-shaped headband design enables even weight distribution, improving user comfort. Furthermore, assembly and disassembly with the safety helmet are very convenient, facilitating future maintenance.

[0120] Reference Figure 15 The ring-shaped headband includes an upper housing 3-1, a lower housing 3-2, a power button 3-3, a fastener 3-4 (such as a fastening knob), a third lens 3-5, a power display panel 3-6, a rechargeable battery 3-7, a button bracket 3-8, and a second rubber plug 3-9. The fastener 3-4 secures the ring-shaped headband to the helmet. The rubber plug 3-9 is a sealing plug for the battery charging port, protecting the interface terminals.

[0121] In some embodiments, when assembling the ring headband, the third lens 3-5 is glued to the upper housing 3-1. The power button 3-3 and button bracket 3-8 are fixed to the upper housing 3-1. The power display panel 3-6 is fixed in the corresponding position with screws. The rechargeable battery 3-7 is glued to the lower housing 3-2 with foam adhesive. The data cable from the main control box 2 is passed through the seventh axis hole 3-1-1, and the power cable is soldered to the power switch. The remaining cable is passed through the eighth axis hole 3-1-2. The fifth axis hole 2-4-1 and the seventh axis hole 3-1-1 are assembled together with screws to form the sixth rotating axis 6. Then, the upper housing 3-1 and the lower housing 3-2 are assembled and fastened with screws. Finally, the rubber plug 23-9 is installed on the lower housing 3-2, and the headband assembly is complete.

[0122] In some embodiments, the protrusion 3-2-1 of the annular headband is inserted into the groove 1-1 of the safety helmet through the lower shell 3-2. At this time, the relative position of the annular headband and the safety helmet is determined. In some embodiments, when the annular headband is fitted onto the safety helmet, the fastener 3-4 is used to pass through the annular headband and contact the safety helmet.

[0123] In some embodiments, refer to Figures 1 to 16 The head-mounted display device proposed in one or more of the aforementioned embodiments, when used with a safety helmet, may include a main control box unit 2, a connecting unit 3, a rotating arm unit 4, and a display unit 5. Connecting the units via three rotating axes enables multi-degree-of-freedom adjustment of the display unit 5. Specifically, the multi-axis design makes the display unit 5 easy to store and allows for easy switching between usage states. In use, the display unit 5 is in... Figure 1 In its normal state, when not in use, the display unit 5 can be folded up above the helmet, as shown below. Figure 5 As shown. When installing the rotating shaft, lubricating shims and damping shims can be added. The lubricating shims can be made of POM, serving a self-lubricating function and eliminating friction noise. The damping shims can be made of rubber, providing damping adjustment. This allows for smoother shaft adjustment with a damped feel. The headband design of connecting unit 3 ensures even weight distribution and facilitates easy assembly and disassembly with the helmet, making future maintenance very convenient. The rotating shaft arm unit 4 allows for adjustment for people with different interpupillary distances, achieving optimal display effects.

[0124] In some embodiments, the head-mounted display device can serve as AR glasses for industrial applications. It features a compact optical engine, a lightweight and thin design, and an aesthetically pleasing appearance. When combined with hardware and software applications, these AR glasses can provide functions such as remote assistance, voice interaction, and infrared temperature measurement, thus demonstrating broad application prospects in the field of smart factories.

[0125] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A head-mounted display device, comprising: The display unit is used to display images. A connection unit is used to position the display unit in front of at least one of the user's eyes after the head-mounted display device is worn on the user's head; The pivot arm unit includes at least a first section, a second section, and a first adjusting member connecting the first section and the second section. The first section is connected to the connecting unit. The first adjusting member is configured to change the relative position of the first section and the second section when subjected to an external force, so that the second section drives the display unit to move to achieve interpupillary distance adjustment. The pivot arm unit further includes a third section, through which the second section is connected to the display unit; The rotating arm unit also includes a second adjusting member, which is connected between the second section and the third section. The second adjusting member is configured to change the relative position between the second section and the third section when subjected to external force, so that the third section drives the display unit to move to achieve interpupillary distance adjustment. The first adjusting member includes a first flexible member, and the second adjusting member includes a second flexible member, wherein the relative position between the third segment and the display unit remains unchanged when the rotating arm unit is bent; The first segment, the second segment, and the third segment each include a rigid pivot arm frame. The pivot arm unit also includes a first flexible trim and a second flexible trim. The pivot arm frame is connected to the first flexible trim and the second flexible trim via flexible parts. The head-mounted display device further includes: a main control box unit for capturing images and communicatively connected to the display unit; and a sixth rotation axis connecting the main control box unit and the connection unit, wherein the main control box unit is configured to rotate about the sixth rotation axis to adjust the shooting angle. The rear cover of the main control box unit includes a third limiting groove and a fifth shaft hole. The sixth rotating shaft includes: a third shaft cover, including a third limiting protrusion, the third limiting protrusion cooperating with the third limiting groove; a fourth rotating shaft frame, including a third side and a fourth side, wherein a third rotating shaft part is provided on the fourth side, wherein the third side is connected to the connecting unit, and the third rotating shaft part is configured to be connected to the third shaft cover via the fifth shaft hole; The display unit includes: a transition housing, an optical engine housing, and a fifth rotation axis, the fifth rotation axis being located between the transition housing and the optical engine housing, and the fifth rotation axis being configured to adjust the display angle of the display unit relative to the human eye during rotation.

2. The head-mounted display device according to claim 1, wherein, The first segment includes a first rigid frame, the second segment includes a second rigid frame, the first flexible element includes a first flexible metal element, and the first flexible metal element is configured to connect the first rigid frame and the second rigid frame through a through-hole inside the first flexible element.

3. The head-mounted display device according to claim 2, wherein, The third segment includes a third rigid frame, and the second flexible element includes a second flexible metal element configured to connect the second rigid frame and the third rigid frame through a through-hole inside the second flexible element.

4. The head-mounted display device according to claim 3, wherein, The pivot arm unit also includes a third flexible trim piece, the first end of which is connected to the first rigid frame, the second end of which is connected to the third rigid frame, and the middle part located between the first end and the second end is connected to the second rigid frame.

5. The head-mounted display device according to any one of claims 1-4, wherein, Also includes: A third rotation axis is used to connect the connecting unit and the rotating arm unit, the rotating arm unit being configured to rotate about the third rotation axis to adjust its relative position with the connecting unit.

6. The head-mounted display device according to claim 5, wherein, The first segment includes a second shaft hole and a first limiting groove, and the third rotating shaft includes: The first shaft cover includes a first limiting protrusion, which cooperates with the first limiting groove; The second rotating shaft frame includes a first side and a second side, and a first rotating shaft portion is provided on the second side. The first side is connected to the connecting unit, and the first rotating shaft portion is configured to be connected to the first shaft cover via the second shaft hole.

7. The head-mounted display device according to claim 6, wherein, The third rotation axis also includes: A first gasket, fitted onto the first rotating shaft, is used for lubrication and / or noise reduction when the first segment rotates around the first rotating shaft; and / or The second shim is fitted onto the first rotating shaft and is used for damping adjustment when the first segment rotates around the first rotating shaft.

8. The head-mounted display device according to claim 5, wherein, Also includes: A fourth rotation axis is provided for connecting the pivot arm unit and the display unit. The pivot arm unit is configured to rotate about the fourth rotation axis to adjust its relative position with respect to the display unit.

9. The head-mounted display device according to claim 8, wherein, The third section of the rotating arm unit includes a third shaft hole and a second limiting protrusion; the adapter housing of the display unit includes a fourth shaft hole and a second limiting groove; the fourth rotating shaft includes: Second shaft cover; The third rotating shaft frame includes a second rotating shaft part, wherein the second rotating shaft part passes through the third shaft hole and the fourth shaft hole and is connected to the second shaft cover, and the second limiting protrusion cooperates with the second limiting groove.

10. The head-mounted display device according to claim 9, wherein, The fourth rotation axis also includes: A third gasket, fitted onto the second rotating shaft, is used for lubrication and / or noise reduction when the third segment rotates around the second rotating shaft; and / or The fourth shim is fitted onto the second rotating shaft and is used for damping adjustment when the third segment rotates around the second rotating shaft.

11. The head-mounted display device according to claim 1, wherein, The sixth rotating axis also includes: A fifth gasket is disposed between the third shaft cover and the rear cover; and / or A sixth gasket, fitted onto the third rotating shaft, is used for lubrication and / or noise reduction when the main control box unit rotates around the third rotating shaft; and / or The seventh shim is fitted onto the third rotating shaft and is used for damping adjustment when the main control box unit rotates around the third rotating shaft.

12. The head-mounted display device according to claim 1, wherein, It also includes head-mounted units: The connecting unit includes a ring-shaped headband, which is used to be fitted onto the headwear unit.

13. The head-mounted display device according to claim 12, wherein, The headgear unit includes a helmet, with the protrusion of the ring headband inserted into a groove in the helmet.

14. The head-mounted display device according to claim 13, wherein, The connecting unit also includes a fastener, which is used to pass through the annular headband and contact the safety helmet when the annular headband is fitted onto the safety helmet.

Images