Head-mounted display device

Abstract

The utility model provides a kind of head-mounted display device, comprising: main body;Two visual mechanisms, along the first direction interval setting in main body, visual mechanism includes: fixed part, is connected to main body;Moving part, is configured as along the second direction close to fixed part with the first direction being orthogonal, or, away from fixed part;Connecting portion, is set to fixed part;Operating part, operating part has transmission shaft, transmission shaft is worn in connecting portion, operating part is configured as with moving part mechanical transmission, to adjust the position of moving part along the second direction relative to fixed part by operating part, so that visual mechanism has different diopter;Damping layer, set between transmission shaft and connecting portion, is configured as limit the further rotation of transmission shaft relative to connecting portion, to keep the relative position of moving part and fixed part.

Description

Technical Field

[0001] At least one embodiment of this utility model relates to the field of display device technology, and more particularly to a head-mounted display device. Background Technology

[0002] Head-mounted displays can be used to control unmanned equipment to improve the monitoring and operation experience of unmanned equipment. They can also be combined with virtual reality (VR) and augmented reality (AR) technologies to provide users with an immersive visual experience.

[0003] Head-mounted display devices mainly consist of a main body and a visual mechanism mounted on the main body. To improve the adaptability of head-mounted display devices and provide users with a better experience, the visual mechanism is often equipped with functions for adjusting interpupillary distance and diopter. However, the diopter adjustment mechanisms in current visual mechanisms are often designed to be quite complex and difficult to achieve precise adjustment. As a result, head-mounted display devices may not meet the visual requirements of some users, easily leading to problems such as unclear display. Utility Model Content

[0004] To address at least one of the above-mentioned and other technical problems in the prior art, this utility model provides a head-mounted display device that limits further rotation of the drive shaft of the operating part by means of a damping layer disposed between the connecting part and the operating part.

[0005] An embodiment of this utility model provides a head-mounted display device, comprising: a main body; two vision mechanisms disposed at a distance from each other along a first direction on the main body, each vision mechanism comprising: a fixed part connected to the main body; a movable part configured to move closer to or further away from the fixed part along a second direction orthogonal to the first direction; a connecting part disposed on the fixed part; an operating part having a drive shaft passing through the connecting part, the operating part being configured to mechanically drive the movable part to adjust the position of the movable part relative to the fixed part along the second direction, thereby giving the vision mechanisms different refractive powers; and a damping layer disposed between the drive shaft and the connecting part, configured to restrict further rotation of the drive shaft relative to the connecting part to maintain the relative position of the movable part and the fixed part.

[0006] According to an embodiment of the present invention, the damping layer is made of a viscoelastic material, which includes at least one of damping grease, damping paste, damping adhesive, and damping tape; or, the damping layer is made of an elastic material and is configured as an annular structure with through holes, through which the drive shaft is interference-fitted.

[0007] According to an embodiment of the present invention, the transmission shaft is configured to pass through the connecting part along a third direction orthogonal to both the first and second directions; the moving part has a first connecting end, and the operating part also has a second connecting end, the second connecting end being disposed at one end of the transmission shaft facing the moving part, and forming a mechanical transmission with the first connecting end.

[0008] According to an embodiment of the present invention, one of the fixing part and the moving part is sleeved outside the other; wherein, the mating surfaces of the fixing part and the moving part form a threaded pair.

[0009] According to an embodiment of the present invention, the fixing part is configured as a first cylindrical structure, the moving part is configured as a second cylindrical structure, the second cylindrical structure is sleeved on one axial end of the first cylindrical structure, the second cylindrical structure has an internal thread, and the first cylindrical structure has an external thread that mates with the internal thread; wherein, the first connecting end is disposed on the outside of the second cylindrical structure.

[0010] According to an embodiment of the present invention, the fixed part has a first lens group; the movable part has a second lens group, the second lens group being configured to move with the movable part relative to the fixed part in a second direction to adjust the distance between the second lens group and the first lens group.

[0011] According to an embodiment of the present invention, at least one of the two vision mechanisms is configured to move relative to the main body to move closer to or further away from the other, so that the two vision mechanisms form different interpupillary distances; the head-mounted display device also includes a damping element disposed on the main body, slidably connected to the connecting portion of the vision mechanism that is movable relative to the main body, and providing a locking force to the connecting portion.

[0012] According to an embodiment of the present invention, the damping member has a guide groove extending in a first direction; the connecting portion is located in the guide groove and is interference-fitted with the inner wall of the guide groove extending in the first direction; wherein the inner wall of the guide groove is made of an elastic material.

[0013] According to an embodiment of the present invention, the connecting part includes: a plate-shaped member; an elastic arm disposed on the plate-shaped member and protruding from the plate-shaped member in a second direction, at least a portion of the elastic arm abutting against the inner wall of the guide groove, and at least one protruding end formed on the side of the elastic arm facing the inner wall of the guide groove, the protruding end abutting against the inner wall of the guide groove.

[0014] According to an embodiment of the present invention, two vision mechanisms are slidably disposed on the main body; the head-mounted display device further includes a first slide rail disposed on the main body and extending along a first direction, and the two vision mechanisms are slidably disposed on the first slide rail; and / or, the head-mounted display device further includes two second slide rails, the two second slide rails being symmetrically disposed on both sides of the main body and extending along the first direction, and the two vision mechanisms being slidably disposed on one of the second slide rails respectively.

[0015] As shown in the illustrative embodiment of this utility model, the head-mounted display device has an operating section. The user can adjust the relative position of the moving part with respect to the fixed part along a second direction by operating the operating section, thereby adjusting the refractive power of the visual mechanism. A damping layer disposed between the transmission shaft and the connecting part provides damping force, which the user must overcome when operating the operating section. This provides feedback to the user during operation and prevents accidental operation without the need for a dedicated locking mechanism. Furthermore, the moment the user stops operating can be considered as the operating section being subjected only to this damping force. Since the operating section and the moving part have a mechanical transmission relationship, this damping force can promptly restrict the movement of the moving part relative to the fixed part along the second direction, thereby achieving precise adjustment of the refractive power. Attached Figure Description

[0016] Figure 1 A partial cross-sectional view of a head-mounted display device according to an embodiment of the present invention is shown schematically;

[0017] Figure 2 yes Figure 1 A partial cross-sectional view of the vision mechanism shown;

[0018] Figure 3 yes Figure 1 A structural schematic diagram of the head-mounted display device from its official viewpoint;

[0019] Figure 4 yes Figure 1 The diagram shows the structure of the head-mounted display device viewed from below.

[0020] In the accompanying drawings, the meanings of the reference numerals are as follows:

[0021] 1. Main body;

[0022] 11. Accommodation space;

[0023] 12. First slide rail;

[0024] 13. Second slide rail;

[0025] 2. Visual mechanism;

[0026] 21. Connecting part;

[0027] 211. Plate-shaped parts;

[0028] 2111, Shoulders;

[0029] 212. Flexible arm;

[0030] 213. Protruding end;

[0031] 22. Operations Department;

[0032] 221. First connection end;

[0033] 2211. Annular groove;

[0034] 222. Drive shaft;

[0035] 223. Operating terminal;

[0036] 23. Moving part;

[0037] 231. Second connection end;

[0038] 232. Second lens group;

[0039] 233. Internal thread;

[0040] 24. Fixing part;

[0041] 241. First lens group;

[0042] 242. First slider;

[0043] 243. External thread;

[0044] 244. The second slider;

[0045] 25. Display unit;

[0046] 3. Damping layer;

[0047] 4. Damping components;

[0048] 41. Guide groove. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0050] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. 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.

[0051] 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.

[0052] When using expressions such as "at least one of A, B, and C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C. Similarly, when using expressions such as "at least one of A, B, or C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C.

[0053] Head-mounted displays are external devices worn on a user's head that can be used in the control of unmanned equipment (such as drones, autonomous vehicles, and robots) to display real-time footage captured by the unmanned equipment, thereby improving the monitoring and operational experience. Alternatively, they can be combined with Virtual Reality (VR) and / or Augmented Reality (AR) technologies to provide users with an immersive visual experience.

[0054] A head-mounted display device mainly comprises a main body and two visual mechanisms disposed on the main body. The two visual mechanisms correspond to the user's two eyes respectively, thereby displaying image information and / or video information to the user. To accommodate different interpupillary distances and visual acuity of users, the spacing between the two visual mechanisms and the refractive power of the visual mechanisms are often adjustable, for example, adjustable between at least two of zero refractive power, positive refractive power, and negative refractive power.

[0055] Currently, vision correction mechanisms include stepped methods for adjusting refractive power, where the adjustment is discontinuous, such as having multiple levels and only being able to adjust the refractive power corresponding to that level; and stepless methods, where the adjustment is continuous.

[0056] Vision mechanisms that use stepped adjustment are generally simple in structure, and because users need to continuously operate between adjacent levels to reach the corresponding level, they also have an anti-accidental touch function. However, their disadvantage is that they cannot achieve precise adjustment. In contrast, vision mechanisms that use stepless adjustment can achieve precise adjustment, but because even a slight operation will change the diopter, they are often equipped with an independent locking structure to maintain the appropriate diopter after adjustment. This makes the structure of the vision mechanism more complex.

[0057] In view of this, how to provide a head-mounted display device with continuously adjustable refractive power of the visual mechanism and a relatively simple structure has become an urgent technical problem to be solved.

[0058] Figure 1 A partial cross-sectional view of a head-mounted display device according to an embodiment of the present invention is shown schematically. Figure 2 yes Figure 1 A partial cross-sectional view of the vision mechanism shown.

[0059] According to the head-mounted display device provided by this utility model, such as Figure 1 and Figure 2 As shown, the device includes a main body 1, two vision mechanisms 2, and a damping layer 3. The two vision mechanisms 2 are spaced apart on the main body 1 along a first direction. Each vision mechanism 2 includes a fixed portion 24, a movable portion 23, a connecting portion 21, and an operating portion 22. The fixed portion 24 is connected to the main body 1. The movable portion 23 is configured to move closer to or further away from the fixed portion 24 along a second direction orthogonal to the first direction. The connecting portion 21 is disposed on the fixed portion 24. The operating portion 22 has a drive shaft 222 passing through the connecting portion 21. The operating portion 22 is configured to mechanically drive the movable portion 23 to adjust the position of the movable portion 23 relative to the fixed portion 24 along the second direction, thereby giving the vision mechanisms 2 different refractive powers. The damping layer 3 is disposed between the drive shaft 222 and the connecting portion 21 and is configured to restrict further rotation of the drive shaft 222 relative to the connecting portion 21 to maintain the relative position of the movable portion 23 and the fixed portion 24.

[0060] In some illustrative embodiments, such as Figure 1 and Figure 2 As shown, the head-mounted display device includes a main body 1, two vision mechanisms 2, and other functional modules. Specifically, the main body 1 serves as the mounting base for the vision mechanisms 2 and the functional modules. To hold the head-mounted display device over the user's face, auxiliary support mechanisms such as temples, nose pads, and headbands can be provided on the main body 1. Furthermore, depending on the different application scenarios of the head-mounted display device, each functional module located on the main body 1 should include at least a portion of the following: a circuit control module (e.g., a control unit, MCU, etc.), a battery and power management module (e.g., a lithium battery, a circuit board for circuit and / or battery management), a positioning module (e.g., laser positioning, visual positioning, etc.), an interaction module (e.g., an interface for connecting handles, controllers, and other external devices), and a communication module (e.g., a data link for communicating with unmanned equipment and / or control stations).

[0061] It should be noted that the functional modules set in the main body 1 are not the focus of protection of this utility model. Any functional module that can be used in head-mounted display devices can be selected and applied. The specific configuration should be based on the specific application scenario of the head-mounted display device.

[0062] like Figure 1 and Figure 2 As shown, the main body 1 has a first direction (X direction), a second direction (Y direction), and a third direction (Z direction). Since this head-mounted display device is worn on the user's head, and the two visual mechanisms 2 correspond to the user's left and right eyes respectively, the first direction (X direction) can be understood as the user's interpupillary distance direction, the second direction as the user's visual axis direction, and the third direction as a direction orthogonal to both the interpupillary distance direction and the visual axis direction. Taking a horizontally worn head-mounted display device as an example, this third direction can be a vertical direction. Unless otherwise stated, the first direction, second direction, and third direction of the main body 1 can all be as follows: Figure 1 and Figure 2 As shown in the accompanying drawings, embodiments of the present invention will be described below with reference to the accompanying drawings.

[0063] In some illustrative embodiments, such as Figure 2 As shown, the vision mechanism 2 includes a fixed part 24, a movable part 23 movable relative to the fixed part 24 along a second direction (Y direction), and a display part 25 disposed on the fixed part 24. The display part 25 includes, but is not limited to, a liquid crystal display (LCD), an organic light-emitting diode (OLED), a Micro OLED, and a module with other display devices. Specifically, both the fixed part 24 and the movable part 23 have lens assemblies, which include an eyepiece (the optical element closest to the user's glasses) and an objective lens (an optical element for receiving light from the display part 25 and forming a preliminary image). For example, the eyepiece may be disposed on the movable part 23, while the objective lens may be disposed on the fixed part 24. Furthermore, other optical elements may also be disposed between the eyepiece and the objective lens. Thus, when the movable part 23 moves relative to the fixed part 24 along the second direction, the spacing of the optical elements along the optical axis can be adjusted, thereby changing the diopter of the vision mechanism 2.

[0064] In some illustrative embodiments, such as Figure 1 and Figure 2 As shown, the vision mechanism 2 also includes a connecting portion 21, which is disposed on the fixed portion 24. Furthermore, an operating portion 22 is disposed on the connecting portion 21, so that the operating portion 22 is coupled to the moving portion 23, forming a mechanical transmission. In this way, the position of the moving portion 23 relative to the fixed portion 24 can be indirectly adjusted by the user's operation of the operating portion 22. The drive shaft 222 of the operating portion passes through the connecting portion 21, and a damping layer 3 is disposed between the drive shaft 222 and the connecting portion 21. The damping layer 3 is configured to apply a damping force to the drive shaft 222 in the opposite direction of rotation. This damping force can be the frictional force applied by the damping layer 3 to the circumferential direction of the drive shaft 222.

[0065] In this embodiment, the head-mounted display device has an operation unit 22. The user can adjust the relative position of the moving part 23 with respect to the fixed part 24 in the second direction by operating the operation unit 22, thereby adjusting the refractive power of the visual mechanism. A damping layer 3 disposed between the drive shaft 222 and the connecting part 21 provides a damping force, which the user must overcome when operating the operation unit 22. The damping force applied by the damping layer 3 to the drive shaft 222 of the operation unit 22 can be the frictional force between the drive shaft 222 and the connecting part 21. When the user operates the operation unit 22, such as twisting the drive shaft 222 circumferentially, when the drive shaft 222 is not rotating relative to the connecting part 21, the drive shaft 222 (and the operation unit 22) experiences static friction. When the force applied by the user to the operation unit 22 exceeds the maximum static friction, the drive shaft 222 begins to rotate relative to the connecting part 21, at which point the drive shaft 222 experiences dynamic friction.

[0066] In the above embodiment, since the mating surface between the drive shaft 222 and the damping layer 3 remains unchanged, the maximum static friction force is greater than the dynamic friction force. This means that the user needs to apply a relatively large force to the operating part 22 (and the drive shaft 222) to indirectly adjust the moving part 23. Thus, without configuring a dedicated locking mechanism (such as a groove and block with a convex-concave fit, or a clutch mechanism with feed connection and disengagement) for the vision mechanism 2, intentionally increasing the force required by the user in the initial adjustment of the operating part 22 prevents misoperation of the refractive power. As the drive shaft 222 rotates relative to the damping layer 3, the friction between the drive shaft 222 and the damping layer 3 becomes dynamic friction. This allows the user to continuously apply a small force during refractive power adjustment and receive feedback from the damping force on the user's operation, resulting in a better operating feel. The moment the user stops operating, it can be considered that the operating part 22 is only subjected to the damping force, thereby timely stopping the rotation of the transmission shaft 222 relative to the moving part 23. This prevents changes in refractive power caused by further rotation of the transmission shaft 222 due to inertia or other reasons, thus achieving precise adjustment of the refractive power. It should be understood that the embodiments of this utility model are not limited thereto.

[0067] For example, the damping force provided by the damping layer 3 can also be achieved through magnetic force. This can be achieved by arranging permanent magnets (or electromagnets) of different polarities (or the same polarity) on the circumferentially outer portion of the drive shaft 222, thereby achieving damping through the magnetic force between the magnets. Specifically, the damping layer 3 may include a first magnet disposed outside the drive shaft 222, and a second magnet disposed outside the first magnet. The first magnet can be a permanent magnet, which is radially magnetized along the drive shaft 222 and rotates with it. The second magnet can be an electromagnet, providing an attractive force opposite to the magnetic pole of the first magnet. Thus, when the user rotates the drive shaft 222, the second magnet can limit the rotation of the drive shaft 222 based on its attractive force on the first magnet.

[0068] According to embodiments of the present invention, such as Figure 2 As shown, one of the fixed part 24 and the movable part 23 is fitted over the other. The mating surfaces of the fixed part 24 and the movable part 23 form a threaded pair.

[0069] According to embodiments of the present invention, such as Figure 2 As shown, the fixing part 24 is configured as a first cylindrical structure, and the moving part 23 is configured as a second cylindrical structure, with the second cylindrical structure sleeved on one axial end of the first cylindrical structure. The second cylindrical structure has an internal thread 233, and the first cylindrical structure has an external thread 243 that mates with the internal thread 233. The first connecting end 221 is located on the outer side of the second cylindrical structure.

[0070] According to embodiments of the present invention, such as Figure 2 As shown, the fixed part 24 has a first lens group 241. The movable part 23 has a second lens group 232, which is configured to move with the movable part 23 relative to the fixed part 24 in a second direction to adjust the distance between the second lens group 232 and the first lens group 241.

[0071] In some embodiments, such as Figure 2 As shown, the first lens group 241 includes at least one lens. The second lens group 232 includes at least one lens, and the extension directions of the optical drive shafts 222 of the lenses in the first lens group 241 and the second lens group 232 coincide.

[0072] In some illustrative implementations, such as Figure 2As shown, the fixing part 24 is configured as a hollow first cylindrical structure, which has a first lens group 241 arranged along the second direction (Y direction). Specifically, the first cylindrical structure has a first end and a second end that are far apart along its axial direction (i.e., the second direction), wherein the fixing part 25 is disposed at the first end, and correspondingly, the moving part 23 is disposed at the second end. Further, the first lens group 241 includes, but is not limited to, at least one of a convex lens, a concave lens, a spherical lens, an aspherical lens, and a Fresnel lens, or a combination of at least two, preferably to meet the corresponding visual design requirements (such as magnifying the image displayed by the display unit 25 to a suitable ratio), wherein the optical element of the first lens group closest to the display unit 25 serves as the aforementioned objective lens.

[0073] In some illustrative embodiments, such as Figure 2 As shown, the movable part 23 is configured as a hollow second cylindrical structure, the opening of which faces the first cylindrical structure and is fitted onto the end of the fixed part 24 opposite to the display part 25. Specifically, a second lens group 232 is provided within the second cylindrical structure. This second lens group includes, but is not limited to, at least one of a convex lens, a concave lens, a spherical lens, an aspherical lens, and a Fresnel lens, or a combination of at least two of these. The optical element furthest from the display part 25 in the second lens group serves as the eyepiece. Furthermore, the optical axes of the optical elements in the first and second lens groups extend in the same direction (i.e., the second direction), allowing the user to observe the image processed by the first and second lens groups through the eyepiece.

[0074] According to embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the drive shaft 222 is configured to pass through the connecting portion 21 along a third direction orthogonal to both the first and second directions. The moving portion 23 has a first connecting end 221. The operating portion 22 also has a second connecting end 231, which is disposed at the end of the drive shaft 222 facing the moving portion 23 and forms a mechanical transmission with the first connecting end 221.

[0075] In some illustrative embodiments, such as Figure 1 and Figure 2 As shown, the first connecting end 221 includes a first bevel gear structure, and the second connecting end 231 includes a second bevel gear structure. The first bevel gear structure and the second bevel gear structure mesh with each other.

[0076] In some illustrative embodiments, such as Figure 1 and Figure 2 As shown, the operation section 22 also has an operation end 223, that is, an end of the drive shaft 222 located outside the connecting section 21.

[0077] In some illustrative embodiments, such as Figure 2As shown, the connecting portion 21 is disposed on the fixing portion 24, and the drive shaft 222 of the operating portion 22 passes through the connecting portion 21 along the third direction (Z direction). Specifically, the portion of the operating portion 22 located within the connecting portion 21 forms a first connecting end 221, and the portion of the operating portion 22 exposed outside the connecting portion 21 forms an operating end 223. Furthermore, the operating end 223 is fixedly connected to the drive shaft 222, allowing the user to rotate the drive shaft 222 around its axis by twisting the operating end. It should be understood that the embodiments of this utility model are not limited thereto.

[0078] For example, the drive shaft 222 may also extend along a second direction (Y direction) and form a mechanical transmission with the connecting part 21, such as through gears and gear sets.

[0079] In some illustrative implementations, such as Figure 2 As shown, the operating end 223 includes, but is not limited to, being configured as a knob structure, and the diameter of the knob structure is configured to be larger than the diameter of the drive shaft 222, so that when the user actuates the drive shaft 222 through the operating end 223, there can be a greater torque to facilitate actuation of the drive shaft 222.

[0080] In some illustrative embodiments, such as Figure 2 As shown, at least a portion of the outer wall of the first cylindrical structure is provided with an external thread 243, and at least a portion of the inner wall of the corresponding second cylindrical structure is provided with an internal thread 233 that mates with the external thread 243, thereby enabling relative movement of the second cylindrical structure (including the second lens assembly) relative to the first cylindrical structure (including the first lens assembly) in the second direction. Furthermore, the second cylindrical structure is provided with a first connecting end 221 circumferentially. This first connecting end 221 includes, but is not limited to, a first bevel gear structure (also referred to as a conical gear structure). Correspondingly, the second connecting end 221 of the operating part 22 can be a second bevel gear structure that meshes with the first bevel gear structure. Based on this, the second bevel gear structure is coaxially arranged with the drive shaft 222. Thus, when the user operates the operating part 22, the moving part 23 can rotate around its axis, thereby enabling the moving part 23 to move relative to the fixed part 24 in the second direction, thereby adjusting the diopter of the vision mechanism 2.

[0081] In some illustrative embodiments, such as Figure 1 As shown, the connecting part 21 includes a plate-shaped member 211. Specifically, a fork arm is provided at the bottom of the fixing part 23, and the end face of the plate-shaped member 211 facing the fork arm has a groove. Furthermore, the groove of the plate-shaped member 211 is engaged and connected with the fork arm provided with the fixing part 23.

[0082] According to one embodiment of the present invention, the damping layer 3 is made of a viscoelastic material. The viscoelastic material includes at least one of damping grease, damping paste, damping adhesive, and damping tape.

[0083] In some illustrative embodiments, such as Figure 2 As shown, the plate-shaped member 211 is provided with a through hole extending along a third direction, and a protruding shoulder 2111 is also provided on the upper part of the plate-shaped member 211. In detail, the shoulder 2111 is configured as an annular structure and is coaxially arranged with the through hole.

[0084] In some illustrative implementations, such as Figure 2 As shown, the drive shaft 222 has a large-diameter side and a small-diameter side with a smaller diameter. Specifically, the small-diameter side of the drive shaft 222 extends downward through a through-hole formed by the plate-shaped member 211, while the large-diameter side is located above the plate-shaped member 211, and the aforementioned second connecting end 221 is formed on this large-diameter side. Further, the end face of the second connecting end 221 (i.e., the second bevel gear structure) facing the shoulder 2111 (which can be considered as the lower end face of the second bevel gear) forms an annular groove 2211, and the aforementioned shoulder 2111 is at least partially located within this annular groove 2211. Even further, a damping layer 3 is disposed within this annular groove 2211.

[0085] In some illustrative embodiments, such as Figure 2 As shown, the opening of the annular groove 2211 is closed by the upper end face of the plate-shaped member 211, thereby keeping the damping layer 3 made of viscoelastic material within the annular groove 2211 as much as possible. Taking an embodiment using damping grease as the damping layer 3 as an example, since damping grease is a semi-solid structure between solid and fluid, it can remain within the annular groove 2211 for a relatively long time. However, with the increase in usage time and changes in temperature and humidity, the damping grease may overflow from the annular groove 2211, leading to wear. In this case, the damping effect can be maintained by applying damping grease.

[0086] In this embodiment, the damping layer 3, made of a viscoelastic material, has high viscosity and strong adhesion, thus preventing the drive shaft 222 from rotating around its axis. It should be understood that the embodiments of this invention are not limited thereto.

[0087] For example, the damping layer 3 can also be made of magnetorheological materials, such as magnetorheological grease. Accordingly, in order to make the viscosity of the magnetorheological material variable, it is necessary to adaptably configure a magnet with a variable magnetic field, such as an electromagnet, in the head-mounted display device so that the magnetorheological material can provide different magnitudes of damping force to the drive shaft 222 under different viscosity conditions.

[0088] For example, in addition to being provided in the annular groove 2211 and the shoulder 2111, the damping layer 3 can also be provided between the through hole formed by the drive shaft 222 and the plate member 211.

[0089] According to another embodiment of the present invention, the damping layer 3 is made of an elastic material and is configured as an annular structure with a through hole, through which the drive shaft 222 is interference-fitted.

[0090] In some illustrative embodiments, the damping layer 3 is made of, but is not limited to, rubber, thermoplastic elastomers, and other elastic materials. Specifically, the damping layer 3 formed of an elastic material can be configured as an annular structure similar in shape to the aforementioned annular groove 221. Furthermore, the through-hole formed by the annular structure of the damping layer 3 is coaxially arranged with the through-hole formed by the plate-shaped member 211, and the inner diameter of the through-hole formed by the damping layer 3 should be smaller than the diameter of the large-diameter side of the drive shaft 222, so that the drive shaft 222 interference fits with the damping layer 3, thereby providing a larger frictional force to the drive shaft 222.

[0091] Figure 3 yes Figure 1 The diagram shows a structural schematic of the head-mounted display device from its official viewpoint. Figure 4 yes Figure 1 The diagram shows the structure of the head-mounted display device viewed from below.

[0092] According to embodiments of the present invention, such as Figure 1 , Figure 3 and Figure 4 As shown, at least one of the two visual mechanisms 2 is configured to move relative to the main body 1 to move closer to or further away from the other, so that the two visual mechanisms 2 form different interpupillary distances. Furthermore, the head-mounted display device also includes a damping element 4 disposed on the main body 1. The damping element 4 is slidably connected to the connecting portion 21 of the visual mechanism 2 movable relative to the main body 1, and provides a locking force to the connecting portion 21.

[0093] According to embodiments of the present invention, such as Figure 1 , Figure 3 and Figure 4 As shown, two vision mechanisms 2 are slidably mounted on the main body 1.

[0094] In some illustrative embodiments, such as Figure 1 and Figure 3As shown, the main body 1 includes, but is not limited to, being configured as a frame, having a left and right portion symmetrically arranged along a first direction (X direction), and a nose pad located between the left and right portions. Of course, for the main body 1 to be worn on the user's head, the main body 1 also has support mechanisms such as temples and / or headbands (not shown in the figure). Specifically, the left and right portions of the main body 1 each form receiving spaces 11, which include, but are not limited to, being configured in a racetrack shape; that is, each receiving space 11 has a generally rectangular cutout area, and at both ends of the rectangular cutout area along the first direction, a generally semi-circular cutout area is integrally formed. Thus, the visual mechanism 2 disposed in the receiving space 11 can slide relative to the main body 11 along the first direction within the receiving space 11, thereby adjusting the distance between the two visual mechanisms 2 to suit the user's interpupillary distance. It should be understood that the embodiments of this utility model are not limited thereto.

[0095] For example, one of the two vision mechanisms 2 can be fixed to the main body 1, that is, the vision mechanism 2 is immovable relative to the main body 1, while the other of the two vision mechanisms 2 is configured to be movable relative to the main body 1 in a first direction, thereby adjusting the distance between the two vision mechanisms 2.

[0096] According to embodiments of the present invention, such as Figure 1 , Figure 3 and Figure 4 As shown, the head-mounted display device also includes a first slide rail 12. The first slide rail 12 is disposed on the main body 1 and extends along a first direction. Two vision mechanisms 2 are slidably disposed on the first slide rail 12.

[0097] According to embodiments of the present invention, such as Figure 1 , Figure 3 and Figure 4 As shown, the head-mounted display device also includes two second slide rails 13, which are symmetrically arranged on both sides of the main body 1 and extend along a first direction. Each of the two vision mechanisms 2 is slidably mounted on one of the second slide rails 13.

[0098] According to embodiments of the present invention, such as Figure 1 As shown, the head-mounted display device includes a first slide rail 12 and two second slide rails 13. Specifically, the first slide rail 12 and the second slide rails 13 are spaced apart along a third direction (Z direction) on the main body 1 and extend along a first direction (X direction). Specifically, the two second slide rails 13 are symmetrical and spaced apart on the left and right sides of the main body 1. Further, the first slide rail 12 is, but is not limited to, located on the upper part of the main body 1 (e.g., above the user's eye socket), and the second slide rails 13 are, but are not limited to, located on the lower part of the main body 1 (e.g., below the user's eye socket), wherein the length of the first slide rail 12 is configured to be greater than the length of the second slide rail 13.

[0099] In some illustrative embodiments, such as Figure 1 and Figure 2 As shown, each vision mechanism 2 is disposed between a first slide rail 12 and a second slide rail 13, thereby restricting the position of the vision mechanism 2 along a third direction (Z direction), so that changes in the relative position between the vision mechanisms 2 can be considered to exist only in the first direction (X direction). In this way, the main body 1 provides good support and fixation for the vision mechanism 2, thereby preventing the vision mechanism 2 from shifting along the third direction (Z direction) during sliding along the first direction (X direction). It should be understood that the embodiments of this utility model are not limited thereto.

[0100] For example, the vision mechanism 2 can be slidably connected to the main body 1 via either the first slide rail 12 or the second slide rail 13.

[0101] For example, in addition to the slide rail, the vision mechanism 2 can also be slidably connected to the main body 1 via a slide shaft, a sliding mechanism provided on the main body 1, and other sliding guide mechanisms.

[0102] In some illustrative embodiments, such as Figure 2 As shown, the fixing part 24 of the vision mechanism 2 has a first slider 242 corresponding to the first slide rail 12 and a second slider 244 corresponding to the second slide rail 13. One of the first slide rail 12 and the first slider 242 forms a recess, while the other forms a protrusion that slides into the recess, so that the first slider 242 and the first slide rail 12 form a sliding engagement along a first direction (X direction); similarly, the second slide rail 13 and the second slider 244 also form a sliding engagement along the first direction (X direction), thereby allowing each vision mechanism 2 to slide relative to the main body 1.

[0103] According to embodiments of the present invention, such as Figure 4 As shown, the damping member 4 has a guide groove 41 extending along a first direction. The connecting portion 21 is located within the guide groove 41 and is interference-fitted with the inner wall of the guide groove 41 extending along the first direction. The inner wall of the guide groove 41 is made of an elastic material.

[0104] According to embodiments of the present invention, such as Figure 4 As shown, the connecting part 21 includes a plate-shaped member 211 and an elastic arm 212. The elastic arm 212 is disposed on the plate-shaped member 211 and protrudes from the plate-shaped member 211 in a second direction. At least a portion of the elastic arm 212 abuts against the inner wall of the guide groove 41.

[0105] In some illustrative embodiments, such as Figure 4As shown, the head-mounted display device includes two damping elements 4, which are symmetrically arranged on the left and right sides of the main body 1. Specifically, the damping elements 4 include, but are not limited to, those configured as plate-like structures, extending along a first direction and located below the second slide rail 13. Further, the damping elements 4 are provided with guide grooves 41 extending along the first direction. The inner wall of the guide grooves 41 is made of, but is not limited to, rubber, silicone, or any other elastic material, so that it can deform inwardly along at least a second direction when subjected to pressure.

[0106] In some illustrative embodiments, such as Figure 4 As shown, elastic arms 212 are symmetrically arranged on both sides of the plate-shaped member 211 facing away from each other along the second direction. Each elastic arm 212 includes two connecting ends connected to the plate-shaped member 211 and a suspension section formed between the two connecting ends. The suspension section includes, but is not limited to, being configured as a strip structure and extending along the first direction (X direction). Specifically, the plate-shaped member 211 and the elastic arms 212 are located within the guide groove 41 formed by the damping member 4, and at least a portion of the elastic arm 212 facing the inner wall of the guide groove 41 presses against the inner wall of the guide groove 41. That is, the width of the guide groove along the second direction (Y direction) should be configured to be slightly smaller than the width between the opposite end faces of the two elastic arms 212 along the second direction (Y direction). For example, the width between the opposite end faces of the two elastic arms 212 along the second direction (Y direction) is, but is not limited to, being configured to be smaller than the width of the guide groove along the second direction (Y direction) by 1 mm, 2 mm, 3 mm, 4 mm, and other arbitrary dimensions.

[0107] In this implementation, since the elastic arm 212 and the inner wall of the guide groove 41 both deform at their contact points, the guide groove 41 can apply a locking force along the first direction (X direction) and the second direction (Y direction) to the elastic arm 212 (including the connecting part 21 and the vision mechanism 2), thereby maintaining the position of the vision mechanism 2 along the first direction. When it is necessary to adjust the position of the vision mechanism 2 along the first direction, since the operating part 22 is inserted into the connecting part 21, the position of the vision mechanism 2 can be adjusted simply by pushing the operating part 22 along the first direction. In other words, the user can adjust the interpupillary distance and diopter of the head-mounted display device simply by performing different operations on the operating part 22.

[0108] According to embodiments of the present invention, such as Figure 4 As shown, at least one protruding end 213 is formed on the side of the elastic arm 212 facing the inner wall of the guide groove 41. The protruding end 213 abuts against the inner wall of the guide groove 41.

[0109] In some illustrative embodiments, such as Figure 4As shown, a protruding end 213 protruding along a second direction is formed in the middle of the elastic arm 212. Specifically, the protruding end 213 is, but is not limited to, disposed in the middle of the elastic arm 212. Further, the protruding end 213 is, but is not limited to, configured as a semi-circular, semi-elliptical, or other block-shaped structure.

[0110] In this embodiment, the contact area between the protruding end 213 of the elastic arm 212 and the inner wall of the guide groove 41 of the damping member 4 can be reduced by setting the protruding end 213. This reduces the sliding friction between the connecting part 2 and the damping member 4, preventing excessive damping provided by the damping member 4 from causing sliding obstruction. This allows the user to adjust the interpupillary distance more smoothly.

[0111] It should also be noted that the directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," and "right," are only for reference in the accompanying drawings and are not intended to limit the scope of protection of this utility model. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted where they may cause confusion in understanding this utility model.

[0112] The embodiments of the present invention have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of the present invention is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of the present invention, and all such substitutions and modifications should fall within the scope of the present invention.

Claims

1. A head-mounted display device, characterized in that, include: main body; Two vision mechanisms are disposed at a distance from each other along a first direction on the main body, the vision mechanisms comprising: A fixing part is connected to the main body; The movable part is configured to move closer to the fixed part or away from the fixed part along a second direction orthogonal to the first direction; A connecting part is provided on the fixing part; An operating unit having a drive shaft passing through the connecting part, the operating unit being configured to mechanically drive the moving part to adjust the position of the moving part relative to the fixed part along the second direction, so that the visual mechanism has different refractive powers; A damping layer, disposed between the drive shaft and the connecting portion, is configured to limit further rotation of the drive shaft relative to the connecting portion in order to maintain the relative position of the moving portion and the fixed portion.

2. The head-mounted display device according to claim 1, characterized in that, The damping layer is made of a viscoelastic material, which includes at least one of damping grease, damping paste, damping adhesive, and damping tape. Alternatively, the damping layer may be made of an elastic material and configured as an annular structure with through holes, through which the drive shaft is interference-fitted.

3. The head-mounted display device according to claim 1 or 2, characterized in that, The drive shaft is configured to pass through the connecting portion in a third direction orthogonal to both the first and second directions; The moving part has a first connecting end, and the operating part also has a second connecting end. The second connecting end is disposed at one end of the transmission shaft facing the moving part and forms a mechanical transmission with the first connecting end.

4. The head-mounted display device according to claim 3, characterized in that, One of the fixed part and the movable part is sleeved outside the other; The mating surfaces of the fixed part and the movable part form a threaded pair.

5. The head-mounted display device according to claim 4, characterized in that, The fixed part is configured as a first cylindrical structure, the movable part is configured as a second cylindrical structure, the second cylindrical structure is sleeved on one axial end of the first cylindrical structure, the second cylindrical structure has an internal thread, and the first cylindrical structure has an external thread that mates with the internal thread. The first connecting end is located on the outside of the second cylindrical structure.

6. The head-mounted display device according to claim 1 or 2, characterized in that, The fixing part has a first mirror group; The movable part has a second lens group, which is configured to move with the movable part relative to the fixed part in the second direction to adjust the distance between the second lens group and the first lens group.

7. The head-mounted display device according to claim 1, characterized in that, At least one of the two vision mechanisms is configured to be movable relative to the subject to move closer to or further away from the other, such that the two vision mechanisms form different interpupillary distances; The head-mounted display device further includes a damping element disposed on the main body, slidably connected to the connecting portion of the visual mechanism that is movable relative to the main body, and providing a locking force to the connecting portion.

8. The head-mounted display device according to claim 7, characterized in that, The damping element has a guide groove extending along the first direction; The connecting part is located inside the guide groove and is interference-fitted with the inner wall of the guide groove extending along the first direction; The inner wall of the guide groove is made of an elastic material.

9. The head-mounted display device according to claim 8, characterized in that, The connecting part includes: Plate-shaped parts; An elastic arm is disposed on the plate-shaped member and protrudes from the plate-shaped member along the second direction. At least a portion of the elastic arm abuts against the inner wall of the guide groove. At least one protruding end is formed on the side of the elastic arm facing the inner wall of the guide groove, and the protruding end abuts against the inner wall of the guide groove.

10. The head-mounted display device according to any one of claims 7 to 9, characterized in that, The two vision mechanisms are slidably disposed on the main body; The head-mounted display device further includes a first slide rail disposed on the main body and extending along the first direction, and the two vision mechanisms are slidably disposed on the first slide rail; And / or, the head-mounted display device further includes two second slide rails, which are symmetrically arranged on both sides of the main body and extend along the first direction, and the two vision mechanisms are slidably arranged on one of the second slide rails.

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