Adjustment mechanism for head-mounted display device, head-mounted display device, and display method thereof

Abstract

The present application discloses an adjustment mechanism for a head-mounted display device, a head-mounted display device, and a display method thereof, for use in improving the interactivity of the head-mounted display device in different scenes, and improving the operation convenience of a user. The adjustment mechanism is mounted on a housing of the head-mounted display device. The adjustment mechanism comprises an adjustment rod and a transmission assembly. The adjustment rod has a first state and a second state; the adjustment rod is used for being disconnected from the transmission assembly in the first state, and for, when receiving a pressing or rotating operation, triggering an electric device of the head-mounted display device to send a signal; and the adjustment rod is used for being transmittingly connected to the transmission assembly in the second state, and for, when receiving the rotating operation, transmitting power to the transmission assembly. The transmission assembly is used for receiving the power transmitted by the adjustment rod, and driving a display assembly of the head-mounted display device to perform myopic or hyperopic adjustment.

Description

Adjustment mechanism of head-mounted display device, head-mounted display device and display method thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on August 11, 2023, with application number 202311016248.2 and application name “Adjustment mechanism of head-mounted display device, head-mounted display device and display method thereof”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of electronic equipment, and in particular to an adjustment mechanism of a head-mounted display device, a head-mounted display device, and a display method thereof. Background Art

[0004] The metaverse is a virtual world constructed using digital technology that mirrors or transcends the real world and can interact with it. Head-mounted display devices (HMDs) are the gateway to the metaverse, allowing users to interact with the virtual world for both entertainment and work. Common HMDs include augmented reality (AR) and virtual reality (VR).

[0005] Currently, head-mounted display devices (HMDs) have issues with gesture interaction failing in some scenarios, requiring users to rely on peripherals to interact with the device, resulting in relatively poor interactivity. Furthermore, for users with myopia or hyperopia, although some HMDs offer vision correction, these often require users to remove the device to adjust the vision. In this state, users cannot be sure whether the adjustment is appropriate for their degree of myopia or hyperopia, resulting in lengthy and cumbersome operations.

[0006] Summary of the Invention

[0007] The present application provides an adjustment mechanism for a head-mounted display device, a head-mounted display device, and a display method thereof, so as to improve the interactivity of the head-mounted display device in different scenarios and enhance the user's operational convenience.

[0008] In a first aspect, the present application provides an adjustment mechanism for a head-mounted display device. The adjustment mechanism can be mounted on the housing of the head-mounted display device and is configured to adjust the head-mounted display device in response to user operation. The adjustment mechanism includes an adjustable rod and a transmission assembly. The adjustment rod has a first state and a second state. In the first state, the adjustment rod can be disconnected from the transmission assembly and, upon receiving a press or rotation operation, trigger an electrical device within the head-mounted display device to send a signal. In the second state, the adjustment rod can be transmission-connected to the transmission assembly and, upon receiving a rotation operation, transmit power to the transmission assembly. The transmission assembly can receive power transmitted by the adjustment rod in the second state and use this power to drive the display assembly of the head-mounted display device to adjust myopia or hyperopia. Using this adjustment mechanism, a user can control the head-mounted display device through the adjustment mechanism without the aid of a handle or gestures. This allows the user to use the head-mounted display device even in the absence of a handle or in dim light. This effectively improves the interactivity of the head-mounted display device in different scenarios and enhances user convenience.

[0009] In some embodiments, an adjustment knob may be provided at one end of the adjustment rod to facilitate user operation. Parameters such as the diameter and thickness of the adjustment knob may be designed based on ergonomics to reduce user operation difficulty.

[0010] In some embodiments, the adjustment rod may include a first rod body and a second rod body, wherein the diameter of the first rod body is larger than that of the second rod body. One end of the first rod body may be used to mount the aforementioned adjustment knob, and the other end surface may have a groove. One end of the second rod body may be assembled into the groove of the first rod body, thereby achieving a fixed connection between the first and second rod bodies. This split structural design can reduce the difficulty of assembling the adjustment rod and the transmission assembly. Moreover, since the radial dimension of the second rod body is relatively small, the transmission assembly can also be relatively small in size to mate with the second rod body, thereby helping to reduce the overall size of the adjustment mechanism.

[0011] In some embodiments, the adjustment mechanism may further include a limiting assembly having an elastic arm, the end of the elastic arm having a protrusion disposed toward the circumference of the adjustment rod. The circumference of the adjustment rod may be provided with a first limiting groove and a second limiting groove, the first limiting groove and the second limiting groove being spaced apart along the axial direction of the adjustment rod. The adjustment rod may slide relative to the limiting assembly, and the adjustment rod may be in a first state when the protrusion of the elastic arm is confined in the first limiting groove, and in a second state when the limiting protrusion of the elastic arm is confined in the second limiting groove, thereby utilizing the limiting assembly to reliably maintain the adjustment rod in the first state or the second state.

[0012] In addition, the limit assembly may further include a fixing frame and a limit cover, wherein the fixing frame and the limit cover may be fixedly connected and form a limit hole, and the adjustment rod is slidably disposed in the limit hole. The elastic arm may be fixed to the fixing frame or the limit cover, and the side of the elastic member provided with the protrusion may be positioned toward the limit hole, so that when the adjustment rod slides in the limit hole, the protrusion can switch between the first limit slot and the second limit slot of the adjustment rod.

[0013] In some embodiments, the first limiting groove and the second limiting groove may be separated by a limiting step, and the two side end faces of the limiting step along the axial direction of the adjusting rod may respectively have a chamfered structure to reduce the risk of the protrusion of the elastic arm getting stuck in the first limiting groove or the second limiting groove, so that the adjusting rod can smoothly switch between the first state and the second state.

[0014] In some embodiments, the axial length of the first limiting groove along the adjusting rod may be greater than the axial length of the protrusion of the elastic arm along the adjusting rod. In this way, when the adjusting rod is in the first state, the adjusting rod can produce a small displacement under the action of pressing, thereby facilitating the triggering of electrical components in the head-mounted display device.

[0015] In some embodiments, the adjustment mechanism may include another form of limiting assembly, which may include a spring sheet and a rotating member. The spring sheet may be fixed to a structural member within the housing, and the spring sheet has a first receiving slot and a second receiving slot spaced apart. The rotating member may include a rotating portion and a first rotating arm and a second rotating arm connected to the rotating portion. The rotating portion may be rotatably disposed within the housing of the head-mounted display device. The first rotating arm has a first limiting post, which can switch between the first receiving slot and the second receiving slot as the rotating portion rotates. The second rotating arm has a second limiting post. The peripheral side of the adjustment rod has a locking groove, which can be used to lock the second limiting post. The adjustment rod can drive the rotating member to rotate through the second limiting post when sliding. The adjustment rod is in a first state when the first limiting post is limited in the first receiving slot, and in a second state when the second limiting post is limited in the second receiving slot. In this way, the limiting assembly can be used to reliably limit the adjustment rod to the first state or the second state.

[0016] For example, the rotating member may be located between the spring sheet and the adjusting rod. In this case, the first limiting column and the second limiting column may be located on opposite sides of the rotating portion to facilitate cooperation with the corresponding structures of the spring sheet and the adjusting rod.

[0017] In some embodiments, the first receiving groove and the second receiving groove are separated by a limiting protrusion, and the limiting protrusion may have an arcuate surface to reduce the risk of the first limiting column getting stuck when moving from the first receiving groove to the second receiving groove, or from the second receiving groove to the second receiving groove.

[0018] In some embodiments, the width of the first receiving groove may be greater than the diameter of the first limiting column, so that when the adjustment rod is in the first state, the adjustment rod can produce a small displacement under the action of pressing, thereby facilitating triggering the electrical components in the head-mounted display device.

[0019] In some embodiments, the transmission assembly may include a housing and a multi-stage gear pair that is sequentially connected in transmission, wherein at least one stage of the gear pair is installed in the housing, and along the power transmission direction, the first stage of the multi-stage gear pair can be used to be connected to the adjustment rod in a meshing state and disconnected from the adjustment rod in a non-meshing state, and the last stage of the multi-stage gear pair can be used to be connected to the display assembly of the head-mounted display device in a meshing state to facilitate driving the display assembly for myopia or hyperopia adjustment.

[0020] In some embodiments, the first-stage gear pair may include a first gear and a second gear, each of which may be sleeved onto an adjustment rod. The first gear may be fixedly connected to the adjustment rod, while the second gear may be loosely fitted with the adjustment rod. The second gear may be rotatably assembled within the housing, and the first gear and the second gear may be end gears. When the adjustment rod is in a first position, the first gear and the second gear are spaced apart, thereby disconnecting the transmission chain of the transmission assembly. When the adjustment rod is in a second position, the first gear and the second gear are meshed, thereby transmitting power from the first gear to the second gear.

[0021] In addition, in order to smoothly connect the first gear and the second gear, the tooth tops of the gear teeth of the first gear can be transitioned by an arc surface. Similarly, the tooth tops of the gear teeth of the second gear can also be transitioned by an arc surface.

[0022] In some embodiments, the last-stage gear pair is located outside the casing, and the last-stage gear pair may include a first bevel gear and a second bevel gear. The first bevel gear may be transmission-connected to the previous-stage gear pair of the last-stage gear pair, and the second bevel gear may be fixedly connected to the display assembly, thereby transmitting power from the adjusting rod to the display assembly in sequence.

[0023] In some embodiments, in addition to the first-stage gear pair and the last-stage gear pair, the gear assembly may also include a second-stage gear pair and a third-stage gear pair. The second-stage gear pair is a cylindrical gear pair, comprising a third gear and a fourth gear, each of which can be rotatably assembled in the housing, and the third gear is fixedly connected to the second gear; the third-stage gear pair is a cylindrical gear pair, comprising a fifth gear and a sixth gear, each of which can be rotatably assembled in the housing, the fifth gear and the fourth gear being connected via a universal joint, and the sixth gear being connected to the driving wheel of the last-stage gear pair. Connecting the fourth and fifth gears via a universal joint allows for variable-angle power transmission between the fourth and fifth gears, reducing the requirements for the location of the starting and ending points of the power transmission.

[0024] In some embodiments, the transmission assembly may further include a gear rod that extends from within the housing to outside the housing, is slidably connected to the housing, and is rotatable relative to the housing, with the portion of the gear rod within the housing having a profiled cross-section. A sixth gear is slidably mounted within the portion of the gear rod within the housing, and the cross-sectional shape of the gear hole of the sixth gear is identical to the profiled cross-section of the gear rod. This allows the sixth gear to drive the gear rod to rotate while also freeing the gear rod's axial freedom, allowing the gear rod to move axially. The driving wheel of the final gear pair is fixed to the portion of the gear rod outside the housing, thereby being able to rotate or slide synchronously with the gear rod.

[0025] In some embodiments, the box body may include a main body, a first gear cover, a second gear cover and a third gear cover, the first gear cover and the second gear cover are respectively covered on opposite sides of the main body, and the third gear cover is arranged adjacent to the first gear cover and the second gear cover, and the third gear cover is fixedly connected to the main body, the first gear cover and the second gear cover respectively.

[0026] In some other embodiments, in addition to the first-stage gear pair and the last-stage gear pair, the gear assembly may also include a second-stage gear pair. The second-stage gear pair may be a cylindrical gear pair. The second-stage gear pair includes a third gear and a fourth gear. The third gear and the fourth gear can be rotatably assembled on the housing respectively. The third gear is fixedly connected to the second gear. The fourth gear is connected to the driving wheel of the last-stage gear pair through a universal joint transmission, so that variable-angle power transmission can be achieved between the fourth gear and the last-stage gear pair, reducing the requirements for the setting positions of the starting and ending points of the power transmission.

[0027] In the above solution, the universal joint may include a first universal yoke, a second universal yoke, and a cross shaft, the cross shaft being mounted on the first and second universal yokes, respectively. The first universal yoke is fixedly connected to the fourth gear, and the second universal yoke has a sleeve at the end away from the cross shaft, the inner hole of the sleeve being a special-shaped hole. One end of the gear rod is slidably mounted on the sleeve, and the cross-sectional shape of the gear rod is the same as that of the special-shaped hole. This allows the universal joint to drive the gear rod to rotate while also releasing the gear rod's axial freedom, allowing the gear rod to move axially. The other end of the gear rod is fixedly connected to the driving wheel of the final gear pair, allowing the driving wheel of the final gear pair to rotate or slide synchronously with the gear rod.

[0028] In a second aspect, the present application further provides a head-mounted display device, which includes a housing, a display assembly, and an adjustment mechanism according to any one of the embodiments of the first aspect. The display assembly and the adjustment mechanism are mounted on the housing, and there are two display assemblies and two adjustment mechanisms, respectively. The two display assemblies are arranged in a one-to-one correspondence with the two adjustment mechanisms. The two display assemblies are arranged along a first direction, and each adjustment mechanism can be arranged on the side of the corresponding display assembly facing away from the other display assembly. The adjustment rod of the adjustment mechanism is slidably assembled on the housing, and the adjustment rod has a first end exposed to the outside of the housing. When the first end of the adjustment rod moves close to the housing, the adjustment rod is in a first state, and when the first end of the adjustment rod moves away from the housing, the adjustment rod is in a second state. In the present application, when the adjustment rod is in the first state, the adjustment rod can be switched from the first state to the second state by applying a pulling force to the adjustment rod; conversely, when the adjustment rod is in the second state, the adjustment rod can be switched from the second state to the first state by applying a pushing force to the adjustment button.

[0029] In some embodiments, the display assembly may include a lens barrel, a display screen, a first lens, and a lens holder. The display screen may be fixed within the lens barrel, and the first lens is supported by the lens holder. The lens holder may be slidably disposed within the lens barrel along the axial direction of the lens barrel, and the lens holder is in transmission connection with a transmission assembly. The lens holder may be driven by the transmission assembly to slide in a direction toward or away from the display screen, thereby driving the first lens to slide synchronously. Based on this design, when a user wears a head-mounted display device, the focal length of the user's eye can be adjusted by adjusting the distance between the first lens and the user's eye, so as to adjust the focal length of the user's eye to the retina for different degrees of myopia or hyperopia, thereby enabling the display assembly to achieve myopia or hyperopia adjustment function.

[0030] In one implementation, the first lens is a concave lens. In this case, the first lens can function as a myopia lens, enabling the display assembly to correct the vision of a myopic user. In another implementation, the first lens is a convex lens. In this case, the first lens can function as a hyperopia lens, enabling the display assembly to correct the vision of a hyperopic user.

[0031] In some embodiments, the lens barrel may include a first barrel and a second barrel, the first barrel being used to accommodate a display screen, a first lens, and a lens holder, and the first barrel being provided with a slide rail extending in the axial direction, and a sliding pin being provided on the peripheral side of the lens holder, and the sliding pin being slidably provided on the slide rail. The second barrel is sleeved on the outer side of the first barrel, and the inner wall of the second barrel is provided with a spiral slide groove, and the end of the sliding pin can extend from the slide rail and be assembled in the slide groove; the second barrel is in transmission connection with a transmission component, and the second barrel can rotate under the drive of the transmission component. When the second barrel rotates, the end of the sliding pin can slide in the slide groove of the second barrel, and there is a tendency of spiral rise or spiral fall, and due to the limitation of the slide rail of the first barrel, the lens holder is driven by the second barrel and only has an axial displacement, thereby realizing the position adjustment of the lens holder and the first lens carried thereon.

[0032] In some embodiments, the lens assembly may further include a second lens, which may be fixed within the first barrel and located on a side of the first lens facing away from the display screen. The second lens may be used to correct the angle of the light source to the lens of the user's eye, allowing the user to clearly see the image displayed on the display screen.

[0033] In some embodiments, the housing may include a frame and a cover plate fixed within the frame. The cover plate may be provided with a first guide rail and a second guide rail. The first guide rail and the second guide rail may be arranged along a first direction, and the first guide rail and the second guide rail may extend along the first direction, respectively. One of the two display assemblies may be slidably mounted on the first guide rail, and the other display assembly may be slidably mounted on the second guide rail. This design allows the distance between the two display assemblies to be adjustable, thereby enabling the head-mounted display device to achieve an interpupillary distance adjustment function, meeting the usage needs of user groups with different interpupillary distances and improving the user experience.

[0034] In some embodiments, the electrical components of the head-mounted display device may include a button. A first support arm may be disposed within the housing, with an end of the first support arm disposed proximate to a second end of an adjustment rod within the housing. The button may be fixed to a side of the first support arm facing the second end of the adjustment rod. The adjustment rod may be configured to trigger the button upon receiving a press operation in a first state, such that a press signal is emitted when the button is triggered.

[0035] In some embodiments, the electrical components of the head-mounted display device may further include a sensor. A second support arm may be disposed within the housing, with the end of the second support arm positioned adjacent to the periphery of the adjustment rod. The sensor may be disposed at the end of the second support arm to detect a rotation signal from the adjustment rod. Alternatively, rotation of the adjustment rod may trigger the sensor to emit a rotation signal.

[0036] Exemplarily, the outer wall of the adjustment rod may include multiple circumferentially distributed regions, each with a different surface roughness. The side of the sensor facing the adjustment rod includes a light source and a photosensitive area. The light source can be used to emit light toward the adjustment rod, causing the light to reflect off the outer wall of the adjustment rod, and the photosensitive area can be used to receive the reflected light. Because the roughness of each region of the outer wall of the adjustment rod varies, the degree of light reflection varies. When light is reflected by different regions of the adjustment rod, the reflected light received by the photosensitive area also varies. Therefore, the region on the adjustment rod that reflects the light can be determined based on the reflected light received by the photosensitive area, and the rotation angle of the adjustment rod can be calculated.

[0037] In some embodiments, the head mounted display device may further include a processor, which may be configured to:

[0038] When determining that the head mounted display device is not connected to the controller, receiving a signal sent by the electrical device when the electrical device is triggered by the adjustment mechanism;

[0039] A corresponding control instruction is generated according to the type of signal, and the control instruction is used to control the display content of the display interface of the head-mounted display device.

[0040] In the present application, the user can interact with the head-mounted display device without the help of a handle or through gestures, but can control the head-mounted display device through an adjustment mechanism. In this way, the head-mounted display device can still be used even in scenes without a handle or in dim light, thereby effectively improving the interactivity of the head-mounted display device in different scenes and improving the user's operating convenience.

[0041] In some embodiments, the processor may also be used to:

[0042] Before receiving the signal sent by the electrical device when being triggered by the adjustment rod, the cursor in the display interface is controlled to point to the interactive control in the display interface according to the user's head movement or eye movement, thereby improving the effectiveness of the control instruction.

[0043] In some embodiments, the type of signal may include a compression signal, and the processor may be configured to:

[0044] A first control instruction is generated according to the pressing signal, and the first control instruction can control a cursor in the display interface to click on an interactive control in the display interface.

[0045] In some embodiments, the type of signal may include a rotation signal, and the processor may be configured to:

[0046] A second control instruction is generated according to the rotation signal, and the second control instruction can control the display interface to slide.

[0047] In some embodiments, the processor may also be used to:

[0048] When a rotation signal is received, the state of the adjusting lever is determined, and when the adjusting lever is in the first state, a second control instruction is generated according to the rotation signal; that is, the adjusting lever can trigger the electrical device and send a valid rotation signal after receiving a rotation operation in the first state. Although the adjusting lever can also trigger the electrical device and send a rotation signal after receiving a rotation operation in the second state, the rotation signal in this state is invalid, and the processor may not process the signal to avoid misoperation.

[0049] In a third aspect, the present application further provides a display method for a head-mounted display device, the display method comprising:

[0050] When determining that the head-mounted display device is in a state where the handle is not connected, receiving a signal sent by an electrical component of the head-mounted display device when triggered by an adjustment mechanism of the head-mounted display device;

[0051] A corresponding control instruction is generated according to the type of signal, and the control instruction is used to control the display content of the display interface of the head-mounted display device.

[0052] By applying the display method provided in this application, the user can interact with the head-mounted display device without the help of a handle or through gestures, but instead control the head-mounted display device through an adjustment mechanism. In this way, the head-mounted display device can still be used even in scenes without a handle or in dim light, thereby effectively improving the interactivity of the head-mounted display device in different scenes and improving the user's operating convenience.

[0053] In some embodiments, the display method may further include:

[0054] Before receiving the signal sent by the electrical device when being triggered by the adjustment rod, the cursor in the display interface is controlled to point to the interactive control in the display interface according to the user's head movement or eye movement, thereby improving the effectiveness of the control instruction.

[0055] In some embodiments, the type of signal may include a press signal, and the display method may specifically include:

[0056] A first control instruction is generated according to the pressing signal, and the first control instruction can control a cursor in the display interface to click on an interactive control in the display interface.

[0057] In some embodiments, the type of signal may include a rotation signal, and the display method may specifically include:

[0058] A second control instruction is generated according to the rotation signal, and the second control instruction can control the display interface to slide. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] FIG1 is a schematic structural diagram of a head-mounted display device provided in an embodiment of the present application;

[0060] FIG2 is a schematic structural diagram of a display module provided in an embodiment of the present application;

[0061] FIG3 is a schematic structural diagram of a first display assembly provided in an embodiment of the present application;

[0062] FIG4 is a partially exploded schematic diagram of a first display assembly provided in an embodiment of the present application;

[0063] FIG5 is a schematic cross-sectional view of a first display assembly according to an embodiment of the present application;

[0064] FIG6 is a schematic diagram of a partial structure of a display module provided in an embodiment of the present application;

[0065] FIG7 is a schematic diagram of a partial cross-sectional structure of the display module shown in FIG6 ;

[0066] FIG8 is a schematic structural diagram of a first adjustment mechanism in one state provided by an embodiment of the present application;

[0067] FIG9 is a schematic structural diagram of a first adjustment mechanism provided in an embodiment of the present application in another state;

[0068] FIG10 is a schematic structural diagram of the universal joint shown in FIG8 ;

[0069] FIG11 is a partial exploded schematic diagram of the lens barrel and transmission assembly provided in an embodiment of the present application;

[0070] FIG12 is a partially exploded schematic diagram of a transmission assembly provided in an embodiment of the present application;

[0071] FIG13 is a schematic structural diagram of another first adjustment mechanism provided in an embodiment of the present application;

[0072] FIG14 is a schematic diagram of a partial structural decomposition of the first adjustment mechanism shown in FIG13;

[0073] FIG15 is a schematic diagram of a partial structure of the first adjustment mechanism shown in FIG13;

[0074] FIG16 is a schematic diagram of a partial structure of the limiting assembly of the first adjustment mechanism shown in FIG13 in one state;

[0075] FIG17 is a schematic diagram of a partial structure of the limiting assembly of the first adjustment mechanism shown in FIG13 in another state;

[0076] FIG18 is a schematic diagram of a partial structure of the transmission assembly of the first adjustment mechanism shown in FIG13 in one state;

[0077] FIG19 is a schematic diagram of a partial structure of the transmission assembly of the first adjustment mechanism shown in FIG13 in another state;

[0078] FIG20 is a partial exploded schematic diagram of the lens barrel and transmission assembly shown in FIG13 ;

[0079] FIG21 is a partial exploded schematic diagram of the transmission assembly shown in FIG13;

[0080] FIG22 a is a display interface of a head-mounted display device provided in an embodiment of the present application;

[0081] FIG22 b is another display interface of the head-mounted display device provided in an embodiment of the present application;

[0082] Figure 23 is a flow chart of the display method of the head-mounted display device provided in an embodiment of the present application.

[0083] Description of the drawings: 100 - display module; 110 - housing; 111 - frame; 1111 - first through hole; 112 - cover plate; 1121 - first guide rail; 113 - accommodation space; 114 - first support arm; 115 - second support arm; 120 - display assembly; 120a - first display assembly; 120b - second display assembly; 121 - lens barrel; 1211 - first barrel; 12111 - slide rail; 12112 - flange; 1212 - second barrel; 12121 - slide groove; 1213 - lug; 1214 - first limiting wall; 1215 - second limiting wall; 122 - lens assembly; 1221 - first lens; 1222 - second lens; 123 - lens holder; 1231 - sliding pin; 130 - Adjustment mechanism; 130a - First adjustment mechanism; 130b - Second adjustment mechanism; 131 - Adjustment rod; 1311 - First rod body; 13111 - Groove; 1312 - Second rod body; 1313 - First limiting groove; 1314 - Second limiting groove; 1315 - Limiting step; 1316 - Special-shaped plug; 1317 - Sealing ring; 1318 - Slot; 132 - Transmission assembly; 1321 - Housing; 132101 - First opening; 132102 - Second opening; 132103 - Third opening; 13211 - Main body; 132111 - First accommodating chamber; 132112 - Second accommodating chamber; 132113 - Third accommodating chamber; 132114 - Fourth accommodating chamber; 13212 - Gear cover; 13212a - First gear cover; 13212b - Second gear cover; 13212c - Third gear cover; 13213 - First portion; 13214 - Second portion; 132141 - Through slot; 1322 - First stage gear pair; 13221 - First gear; 13222 - Second gear; 1323 - Second stage gear pair; 13231 - Third gear; 13232 - Fourth gear; 1324 - Third stage gear pair; 13241a - Fifth gear; 13242a - Sixth gear; 132421 - Guide protrusion; 1325 - Fourth stage gear pair; 13251, 13241b - first bevel gear; 13252, 13242b - second bevel gear; 1326 - universal joint; 13261 - first universal joint fork; 132621 - sleeve; 13262 - second universal joint fork; 13263 - cross shaft; 1327 - gear rod; 13271 - guide groove; 13272 - first boss; 13273 - second boss; 13274 - annular groove; 133 - adjustment button; 1331 - first mounting slot; 13311 - slot; 134 - limit assembly; 1341 - elastic arm; 13411 - protrusion; 1342 - fixing bracket; 1343 - limit cover; 1344 - limit hole; 1346 - spring piece; 13461 - fixing portion; 13462-first elastic branch; 134621-first receiving slot; 134622-second receiving slot;134623 - Position-limiting protrusion; 13463 - Second elastic branch; 1347 - Rotating member; 13471 - Rotating portion; 13472 - First rotating arm; 134721 - First position-limiting post; 13473 - Second rotating arm; 134731 - Second position-limiting post; 135 - Follower; 1351 - Second mounting slot; 13511 - Protrusion; 135111 - Special-shaped slot; 1352 - Bump; 136 - Mounting seat; 1361 - First seat body; 1362 - Second seat body; 13621 - Mounting hole; 140 - Button; 150 - Sensor; 200 - Fixing assembly. DETAILED DESCRIPTION

[0084] In order to make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted. The words expressing position and direction described in the embodiments of the present application are all explained using the accompanying drawings as examples, but changes may be made as needed, and the changes made are all included in the scope of protection of the present application. The drawings in the embodiments of the present application are only used to illustrate the relative position relationship and do not represent the true proportion.

[0085] It should be noted that the following description sets forth specific details to facilitate understanding of the present application. However, the embodiments of the present application can be implemented in a variety of other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotations of the embodiments of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0086] Referring to Figure 1, Figure 1 is a schematic diagram of the structure of a head-mounted display device provided in an embodiment of the present application. In an embodiment of the present application, the head-mounted display device can be an augmented reality (AR) display device, a virtual reality (VR) display device, or a mixed reality (MR) display device, such as VR glasses, VR helmets, or AR glasses, AR helmets, or MR glasses, MR helmets, etc. Users can wear head-mounted display devices to play games, read, watch movies (or TV series), participate in virtual meetings, participate in video education, or video shopping, etc. The head-mounted display device of the embodiment shown in Figure 1 is explained using VR glasses as an example.

[0087] A head-mounted display device may include a display module 100 and a fixing assembly 200. The display module 100 may be used to display images. In a specific implementation, the image displayed by the display module 100 may be an image projected onto the display module 100 by a terminal device (e.g., a mobile phone, tablet computer, etc.), or an image formed by the display module 100. The fixing assembly 200 may be used to support the display module 100 and fix the display module 100 in front of the user's eyes when the user wears the head-mounted display device.

[0088] Exemplarily, the fixing component 200 may include two temples, which are respectively connected to both sides of the display module 100 to form a wearing space for accommodating the user's head together with the display module 100; or, the fixing component 200 may also be a fixing strap, which may include at least two ends, and the two ends of the fixing strap are respectively connected to both sides of the display module 100, so that a wearing space for accommodating the user's head can also be formed between the fixing strap and the display module 100; or, the fixing component 200 may also be a headband or a helmet shell.

[0089] Referring to Figure 2, Figure 2 is a schematic structural diagram of a display module 100 provided in an embodiment of the present application. In the embodiment of the present application, the display module 100 may include a housing 110, a display component 120, and an adjustment mechanism 130. Among them, the display component 120 and the adjustment mechanism 130 are both installed on the housing 110, and there are two display components 120. The two display components 120 can provide image display for the user's left eye and right eye respectively; there can also be two adjustment mechanisms 130, and the two adjustment mechanisms 130 are set in a one-to-one correspondence with the two display components 120. Each adjustment mechanism 130 can be used to adjust the display mode, position and other information of the corresponding display component, so that the user can interact with the head-mounted display device, adjust myopia / hyperopia or adjust pupil distance and other functions by operating the adjustment mechanism 130.

[0090] In this embodiment, the display module 120 may also include a circuit board (not shown in the figure), which can be used to set up a processor, memory, and communication module. The processor is used to control the overall operation of the head-mounted display device and may include one or more processing units. For example, the processor may include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a video processing unit (VPU) controller, memory, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU). Among them, different processing units can be independent devices or integrated into one or more processors. The memory can be used to store instructions and data. The communication module can be used to implement the communication function between the head-mounted display device and external devices. In addition, the display module may also include devices such as a battery, a camera, and a microphone.

[0091] 2 , the housing 110 may include a frame 111 and a cover 112. The cover 112 may be fixed within the frame 111 and, together with the frame 111, define a receiving space 113. For example, the frame 111 and the cover 112 may be an integral structure, or the frame 111 and the cover 112 may be formed separately and then fixedly connected by riveting, bonding, or the like.

[0092] In order to make the display module 100 fit the user's face better, the two ends of the frame 111 along its width direction can be bent relative to its main body. When the user wears the head-mounted display device, the main body of the frame 111 is opposite to the front of the user's face, and the bent parts at both ends of the frame are opposite to the side of the user's face. In addition, the shell 110 can also include a mask (not shown in the figure), which can be fixed to the frame 111. When the user wears the head-mounted display device, the mask is located on the side of the display module 100 facing the user's face, and the mask can fit the user's face. This can improve the wearing comfort of the user on the one hand, and on the other hand, it can also make the accommodating space 113 of the shell 110 form an effect similar to a dark room, which helps to improve the display effect of the head-mounted display device.

[0093] For ease of explanation, in the embodiment of the present application, the two display components 120 may be respectively referred to as the first display component 120a and the second display component 120b. Correspondingly, the adjustment mechanism 130 corresponding to the first display component 120a may be referred to as the first adjustment mechanism 130a, and the adjustment mechanism 130 corresponding to the second display component 120b may be referred to as the second adjustment mechanism 130b.

[0094] The first display assembly 120a and the second display assembly 120b are located within the housing space 113 of the housing 110, and the first display assembly 120a and the second display assembly 120b are arranged along a first direction. The first direction can be understood as the width direction of the head-mounted display device, or can be understood as the arrangement direction of the user's two eyes when the user wears the head-mounted display device. The first adjustment mechanism 130a can be partially located within the housing space 113 to facilitate connection with the first display assembly 120a, and the other part of the first adjustment mechanism 130a can be located outside the housing space 113 to facilitate user operation. Similarly, the second adjustment mechanism 130b can also be partially located within the housing space 113 and the other part can be located outside the housing space 113.

[0095] The following embodiments mainly illustrate the display module 100 by taking the first display component 120a and the first adjustment mechanism 130a as an example. The second display component 120b and the second adjustment mechanism 130b can be configured with reference to the first display component 120a and the first adjustment mechanism 130a, respectively.

[0096] With reference to Figures 3 and 4, Figure 3 is a schematic structural diagram of the first display assembly 120a provided in an embodiment of the present application, and Figure 4 is a partially exploded schematic diagram of the first display assembly 120a provided in an embodiment of the present application. In an embodiment of the present application, the first display assembly 120a may include a lens barrel 121, a display screen (not shown in the figure), and a lens group 122, wherein the axial direction of the lens barrel 122 extends along a second direction, and the second direction can be understood as the thickness direction of the display module, or can be understood as the direction close to or away from the user's eyes when the user wears the head-mounted display device. Both the lens group 122 and the display screen can be arranged in the lens barrel 121, and the display screen is located on the side of the lens group 122 facing the cover plate. That is, when the user wears the head-mounted display device, the display screen is located on the side of the lens group 122 away from the user's glasses.

[0097] In the embodiments of the present application, the display screen may be a micro organic light emitting diode (micro OLED), a silicon-based OLED, a liquid crystal display (LCD), a micro light emitting diode (micro LED) or other display devices, and the present application does not make any specific limitations on this.

[0098] In an embodiment of the present application, the lens group 122 may include a first lens 1221. The surface shape of the first lens 1221 can be designed as a concave lens or a convex lens as required. For example, in one implementation, the first lens 1221 is a concave lens. In this case, the first lens 1221 can serve as a myopic lens, enabling the first display assembly 120a to correct the vision of a myopic user, thereby enabling the head-mounted display device to meet the needs of myopic users. In another implementation, the first lens 1221 is a convex lens. In this case, the first lens 1221 can serve as a hyperopic lens, enabling the first display assembly 120a to correct the vision of a hyperopic user, thereby enabling the head-mounted display device to meet the needs of hyperopic users.

[0099] In some embodiments, the first lens 1221 can be slidably disposed on the lens barrel 121 along the second direction. Thus, by moving the position of the first lens 1221, the relative distance between the first lens 1221 and the user's eye can be changed, thereby adjusting the focal length of the user's eye. It is easy to understand that the focal length of eyes with different degrees of myopia or hyperopia is different. Based on the above-mentioned adjustment function, the first display component 120a can adjust the focal length of the user's eye with different degrees of myopia or hyperopia to the retina. This is equivalent to the first display component 120a achieving the effect of myopia glasses or hyperopia glasses with different degrees of myopia, thereby effectively expanding the user base of the head-mounted display device and improving the user experience.

[0100] In this embodiment, the first display component 120a may further include a lens bracket 123, which is roughly annular in structure. The first lens 1221 can be fixed to the lens bracket, and the lens bracket 123 can be slidably arranged in the lens barrel 121 along the second direction, thereby adjusting the position of the first lens 1221 by moving the lens 123 bracket, thereby reducing the difficulty of sliding connection between the first lens 1221 and the lens barrel 121.

[0101] For example, the first lens 1221 can be fixed to the inner wall of the lens holder 123. To improve the connection between the first lens 1221 and the lens holder 123, the inner wall of the lens holder 123 is provided with a stepped surface, and the edge of the first lens 1221 is fixed to the stepped surface. In addition, the first lens 1221 and the lens holder 123 can be fixed by, but are not limited to, bonding.

[0102] Continuing with reference to Figures 3 and 4, the lens barrel 121 may include a first barrel 1211 and a second barrel 1212, wherein the second barrel 1212 is sleeved on the outside of the first barrel 1211, and the lens holder 123 is specifically slidably disposed within the first barrel 1211. One or more sliding pins 1231 may be provided on the circumference of the lens holder 123, and the sliding pins 1231 extend in the radial direction of the lens holder 123. Accordingly, the first barrel 1211 may be provided with one or more sliding rails 12111 extending along the second direction, and the sliding rails 12111 and the sliding pins 1231 of the lens holder 123 may be provided in a one-to-one correspondence, each sliding pin 1231 may be slidably disposed within a corresponding sliding rail 12111, and the end of the sliding pin 1231 may extend from the inside of the sliding rail 12111 to the outside of the first barrel 1211.

[0103] The inner wall of the second barrel 1212 may be provided with one or more slide grooves 12121, and the slide grooves 12121 may also be provided in a one-to-one correspondence with the sliding pins 1231 of the lens holder 123. The slide grooves 12121 may extend along the circumference of the second barrel, and the slide grooves 12121 gradually extend from the side away from the display screen to the side close to the display screen. Therefore, in this embodiment, the slide grooves 12121 can be regarded as a spiral structure that rotates along the circumference of the second barrel 1212. In addition, when there are multiple slide grooves 12121, the multiple slide grooves 12121 are distributed along the circumference of the second barrel, and the spiral directions of the multiple slide grooves 12121 are the same. In this case, the ends of the multiple slide grooves 12121 away from the display screen are approximately in the same plane in the second direction, and the ends of the multiple slide grooves 12121 close to the display screen are also approximately in the same plane in the second direction.

[0104] Referring to Figures 4 and 5 , Figure 5 is a schematic cross-sectional view of the first display assembly 120a provided in an embodiment of the present application. As previously described, the sliding pin 1231 of the lens holder 123 is assembled within the slide rail 12111 of the first barrel 1211, and the end of the sliding pin 1231 can extend from the slide rail 12111 to the outside of the first barrel 1211. In a specific implementation, the end of the sliding pin 1231 can be assembled within the corresponding slide groove 12121 of the second barrel 1212. In other words, the lens holder 123 is in a relative motion relationship with the first barrel 1211 and the second barrel 1212, respectively. By rotating the second barrel 1212, the end of the sliding pin 1231 can slide in the slide groove 12121 of the second barrel 1212, and there is a tendency of spiral upward (which can be understood as the direction approaching the display screen) or spiral downward (which can be understood as the direction away from the display screen). Due to the limitation of the slide rail 12111 of the first barrel 1211, the lens holder 123 can only move in the second direction under the drive of the second barrel 1212, thereby realizing the position adjustment of the lens holder 123 and the first lens 1221 carried thereon in the second direction.

[0105] In some embodiments, the lens assembly 122 may further include a second lens 1222, which may be fixed within the first barrel 1211 and located on the side of the first lens 1221 facing away from the display screen. In a specific design, the second lens 1222 may be a convex lens. When a user wears the head-mounted display device, the distance between the user's eyes and the display screen is too close, making it difficult to clearly see the display screen. However, by configuring the second lens 1222, the angle of the light source in the user's eye lens can be corrected, allowing the user to clearly see the display screen.

[0106] For example, the second lens 1222 can be fixed to the inner wall of the first barrel 1211. To improve the connection between the second lens 1222 and the first barrel 1211, the inner wall of the first barrel 1211 can be provided with a stepped surface, and the edge of the second lens 1222 can be fixed to the stepped surface. In addition, the second lens 1222 and the first barrel 1211 can be fixed by, but are not limited to, bonding.

[0107] Referring to FIG. 6 , FIG. 6 is a schematic diagram of a partial structure of a display module 100 provided in an embodiment of the present application. The diagram illustrates the partial structure of the display module 100 on the first display assembly 120a and the first adjustment mechanism 130a side. The first adjustment mechanism 130a may be located on the side of the first display assembly 120a facing away from the second display assembly. In this embodiment of the present application, a first guide rail 1121 may be provided on a surface of the cover plate 112 facing the receiving space. The first guide rail 1121 is fixed to the cover plate 112 along a first direction, and the first display assembly 120a is slidably mounted on the first guide rail 1121. In a specific implementation, the end of the lens barrel 121 of the first display assembly 120a facing the cover plate 112 has a lug 1213. The lug 1213 is provided with an opening, and the first guide rail 1121 can be inserted into the opening. The engagement between the lug 1213 and the first guide rail 1121 allows the first display assembly 120a to be slidably mounted on the first guide rail 1121. In this embodiment, by sliding the display assembly along the first direction and assembling it on the cover 112, the distance between the two display assemblies can be changed, thereby enabling the head-mounted display device to achieve an interpupillary distance adjustment function, meeting the usage needs of user groups with different interpupillary distances and improving the user experience.

[0108] The lug 1213 can be disposed on the end surface of the first barrel 1211. To provide ample installation space for the lug 1213, a flange 12112 can be provided on the end of the first barrel 1211 facing the cover plate 112. The lug 1213 can be specifically disposed on the side of the flange 12112 facing the cover plate 112. The lug 1213 and the first barrel 1211 can be integrally molded, or they can be molded separately and then fixedly connected by bonding or other means. In addition, after the first barrel 1211 and the second barrel 1212 are assembled, the second barrel 1212 can be located on the side of the flange 12112 of the first barrel 1211 facing away from the cover plate 112.

[0109] In order to improve the sliding stability of the first display assembly 120a relative to the cover plate 112, a plurality of first guide rails 1121 may be provided on the cover plate 112. The plurality of first guide rails 1121 may be arranged along a third direction. Here, the third direction may be understood as the height direction of the head-mounted display device, or may be understood as the length direction of the user's face when the user is wearing the head-mounted display device. Accordingly, the end surface of the first cylinder 1211 may be provided with a plurality of groups of lugs 1213. The plurality of groups of lugs 1213 are provided in a one-to-one correspondence with the plurality of first guide rails 1121. Each group of lugs 1213 may include one or more lugs 1213, and each lug 1213 in each group of lugs 1213 is slidably connected to a corresponding first guide rail 1121.

[0110] Referring to Figures 6 and 7 , Figure 7 is a schematic diagram of a partial cross-section of the display module 100 shown in Figure 6 . The first adjustment mechanism 130a includes an adjustment rod 131 and a transmission assembly 132. The first end of the adjustment rod 131 can extend from a first through-hole 1111 provided in the housing 111 to the exterior of the housing 110. The second end of the adjustment rod 131 is located within the housing, and the adjustment rod 131 can slide along the first through-hole 1111. The first through-hole 1111 can be provided on a side wall of the housing 111 proximal to the first display assembly 120a, i.e., on a side wall of the housing 111 along the first direction. As previously mentioned, the housing 111 has two bends at both ends along the first direction. Therefore, to provide relatively ample installation space for the adjustment rod 131, the sliding direction of the adjustment rod 131 can have a certain angle with the first direction. This angle can be approximately equal to the bending angle of the bend relative to the main body of the housing 111. The transmission assembly 132 is located inside the housing. The transmission assembly 132 can be transmission-connected to the lens barrel 121 of the first display assembly 120 a . For example, the transmission assembly 132 can be transmission-connected to the second barrel 1212 of the lens barrel 121 .

[0111] In some embodiments, the first end of the adjustment rod 131 may be provided with an adjustment button 133, and the user can control the first adjustment mechanism 130a by operating the adjustment button 133. Parameters such as the diameter and thickness of the adjustment button 133 can be designed based on ergonomics to reduce the difficulty of operation for the user.

[0112] In addition, in the embodiment of the present application, the adjustment rod 131 can be an integral structure or a split structure. For example, in the embodiment shown in FIG7 , the adjustment rod 131 can include a first rod body 1311 and a second rod body 1312. The diameter of the first rod body 1311 is larger than the diameter of the second rod body 1312. One end of the first rod body 1311 can constitute the first end of the adjustment rod 131, and the other end surface of the first rod body 1311 can have a groove 13111 extending along its length. One end of the second rod body 1312 can constitute the second end of the adjustment rod 131, and the other end of the second rod body 1312 can be assembled into the groove 13111 of the first rod body 1311, thereby achieving a fixed connection between the second rod body 1312 and the first rod body 1311. In this way, the adjustment rod 131 can use the first rod body 1311 to mount the adjustment button 133, and use the second rod body 1312 to achieve a transmission connection with the transmission assembly 132. This split structural design can reduce the difficulty of assembling the adjustment rod 131 and the transmission assembly 132, and since the radial dimension of the second rod body 1312 is relatively small, the transmission assembly 132 can also be matched with the second rod body 1312 with a relatively small size, thereby helping to reduce the space occupied by the first adjustment mechanism 130a in the shell 110.

[0113] For example, the inner wall of the groove 13111 of the first rod 1311 may have an internal thread, and correspondingly, the outer wall of the portion of the second rod 1312 assembled in the groove 13111 may have an external thread, so that the first rod 1311 and the second rod 1312 are fixedly connected by a threaded connection. Of course, in other embodiments, the first rod 1311 and the second rod 1312 may also be fixedly connected by a key connection, an interference fit, an adhesive, or the like.

[0114] Continuing with reference to FIG. 7 , in the embodiment of the present application, the adjustment rod 131 can have two different states. The adjustment rod 131 can switch between the two states by sliding along the first through hole 1111. Corresponding to the two states of the adjustment rod 131, the first adjustment mechanism 130a can implement different adjustment functions. For ease of explanation, the state in which the adjustment rod 131 is relatively retracted into the housing 110 is referred to as the first state, and the state in which the adjustment rod 131 is relatively extended from the housing 110 is referred to as the second state. As will be readily understood, when the adjustment rod 131 is in the first state, the adjustment button 133 is closer to the outer wall of the frame 111. Therefore, by pulling the adjustment button 133 toward the outside of the housing 110, the adjustment rod 131 can be switched from the first state to the second state. Conversely, when the adjustment rod 131 is in the second state, by pressing the adjustment button 133 toward the inside of the housing 110, the adjustment rod 131 can be switched from the second state to the first state.

[0115] In the embodiment of the present application, the adjustment rod 131 is disconnected from the transmission assembly 132 in the first state, and in this state, the user can interact with the head-mounted display device by operating the adjustment rod 131; the adjustment rod 131 is in a second state, and is transmission-connected to the transmission assembly 132, and in this state, the user can transmit torque to the transmission assembly 132 by operating the adjustment rod 131, so as to transmit the torque to the lens barrel 121 of the first display assembly 120a through the transmission assembly 132.

[0116] In order to ensure that the adjustment rod 131 can be stably and reliably maintained in the first state or the second state, the first adjustment mechanism 130a may further include a limiting component 134 for limiting the adjustment rod 131. The following is an illustrative description of the structure of a possible limiting component 134 provided in an embodiment of the present application.

[0117] Continuing with reference to Figures 6 and 7, in this embodiment, the limiting assembly 134 includes an elastic arm 1341, one end of which is fixed relative to the housing 110, and the other end of which is provided with a protrusion 13411 disposed toward the adjustment rod 131. The circumference of the adjustment rod 131 includes a first limiting groove 1313 and a second limiting groove 1314, wherein the first limiting groove 1313 is located on the side of the second limiting groove 1314 near the adjustment button 133, and a limiting step 1315 is formed between the first limiting groove 1313 and the second limiting groove 1314. In a specific implementation, the first limiting groove 1313 and the second limiting groove 1314 can be provided on either the first rod 1311 or the second rod 1312, and this is not limited to this aspect of the present application. Figure 6 illustrates a case where both limiting grooves are provided on the first rod 1311. In addition, the first limiting groove 1313 and the second limiting groove 1314 can both be annular grooves, and the limiting step 1315 formed therebetween is an annular step.

[0118] The protrusion 13411 of the elastic arm 1341 can be limited in the first limiting groove 1313 or the second limiting groove 1314 . When the protrusion 13411 of the elastic arm 1341 is limited in the first limiting groove 1313, the adjusting rod 131 is in the first state. At this time, if the adjusting rod 131 is subjected to tension and moves to the outside of the shell 110, the elastic arm 1341 is deformed, and the protrusion 13411 of the elastic arm 1341 can pass through the limiting step 1315 and move into the second limiting groove 1314, thereby adjusting the adjusting rod 131 to the second state; when the protrusion 13411 of the elastic arm 1341 is limited in the second limiting groove 1314, the adjusting rod 131 is in the second state. At this time, if the adjusting rod 131 is subjected to pressing force and moves to the inside of the shell 110, the elastic arm 1341 is deformed, and the protrusion 13411 of the elastic arm 1341 can pass through the limiting step 1315 and move into the first limiting groove 1313, thereby adjusting the adjusting rod 131 to the first state.

[0119] Furthermore, to reduce the risk of the protrusion 13411 of the elastic arm 1341 becoming stuck in the first limiting groove 1313 or the second limiting groove 1314 and to enable the adjustment rod 131 to smoothly switch between the first and second positions, the end surfaces of the protrusion 13411 along the axial direction of the adjustment rod 131 can be chamfered or rounded. Alternatively, the surface of the protrusion 13411 can be designed as an arcuate surface. Accordingly, the end surfaces of the limiting step 1315 can also be chamfered or rounded.

[0120] In some embodiments, the position limiting assembly 134 may include a fixing frame 1342 and a position limiting cover 1343. The fixing frame 1342 may be fixed to the inner wall of the housing 110, for example, the inner wall of the cover plate 112 or the inner wall of the frame 111. The position limiting cover 1343 is disposed on the end of the fixing frame 1342 away from the inner wall of the housing 110. For example, the position limiting cover 1343 and the fixing frame 1342 may be fixedly connected by fasteners. The end of the fixing frame 1342 facing the position limiting cover 1343 may be provided with a groove, and the side of the position limiting cover 1343 facing the fixing frame may also be provided with a groove. The groove of the fixing frame 1342 and the groove of the position limiting cover 1343 are arranged opposite each other and together form a position limiting hole 1344. The axis of the position limiting hole 1344 may be substantially coaxial with the axis of the first through hole 1111. The adjustment rod 131 may be inserted into the position limiting hole 1344.

[0121] In one implementation, the elastic arm 1341 can be disposed on the limiting cover 1343, extending along the axial direction of the adjustment rod 131, with one end of the elastic arm 1341 fixedly connected to the limiting cover 1343, and the protrusion 13411 located at the other end of the elastic arm 1341 and disposed toward the limiting hole 1344. In another implementation, the elastic arm 1341 can be disposed on the fixing bracket 1342, with one end of the elastic arm 1341 fixedly connected to the fixing bracket 1342, and the protrusion 13411 located at the other end of the elastic arm 1341 and disposed toward the limiting hole 1344.

[0122] After understanding the switching mode of the adjusting rod 131 between the first state and the second state and the limiting effect of the limiting assembly 134 on the adjusting rod 131 , the adjusting function of the adjusting rod 131 in the two states will be described in detail below.

[0123] Please refer to Figure 6 again. The display module 100 may include one or more electrical components, all of which are arranged inside the housing 110. The electrical components can be connected to the circuit board of the display module 100 through wires, and further connected to the processor through the wiring provided on the circuit board. Among them, the wires used to connect the electrical components to the circuit board can be cables, or they can also be flexible printed circuit boards (FPCs). Both cables and FPCs can adapt to the wiring space in the housing 110 by deformation, thereby reducing the difficulty of connecting the electrical components to the circuit board. The adjustment rod 131 can be used to trigger the one or more electrical components when pressed or rotated in the first state, so that the electrical components send signals to the processor, and then the processor performs corresponding functions according to the received signals.

[0124] In some embodiments, the one or more electrical components may include a button 140, which may be arranged toward the second end of the adjustment rod 131. The button 140 can be triggered in a pressed state, and the processor can execute a corresponding function, such as triggering a control, etc., after receiving a signal that the button 140 is triggered. Exemplarily, the button 140 may be a DOME button. In addition, in order to fix the position of the button 140, a first support arm 114 may be provided in the shell 110, and the first support arm 114 may be fixed to the inner wall of the shell 110, such as the inner wall of the cover 112 or the inner wall of the frame 111. The end of the first support arm 114 away from the inner wall of the shell 110 is arranged close to the second end of the adjustment rod 131, and the button 140 can be provided at this end of the first support arm 114.

[0125] In one specific implementation, the length of the first limiting groove 1313 along the axial direction of the adjustment rod 131 is greater than the length of the protrusion 13411 of the elastic arm 1341 along the axial direction of the adjustment rod 131. Thus, when the adjustment rod 131 is in the first state, the adjustment rod 131 can produce a small displacement when pressed. When the adjustment rod 131 is in the first state and not pressed, a certain gap can be left between the second end of the adjustment rod 131 and the button 140. When the adjustment rod 131 is pressed, the second end of the adjustment rod 131 can trigger the button 140, thereby inputting a key signal.

[0126] Continuing with FIG6 , in some embodiments, the one or more electrical components may further include a sensor 150 that can be configured to detect a rotation signal of the adjustment lever 131. The rotation signal may be a rotation angle. A processor may receive the rotation signal detected by the sensor 150 and execute a corresponding function based on the rotation signal, such as increasing or decreasing the volume, switching between menus, and the like.

[0127] Furthermore, the processor can be configured to first determine the state of the adjustment rod 131, and if it is determined that the adjustment rod 131 is in the first state, then obtain the rotation signal detected by the sensor 150. In other words, when the user is wearing the head-mounted display device, after adjusting the adjustment rod 131 to the first state, they can interact with the head-mounted display device by rotating the adjustment knob 133.

[0128] In addition, in this embodiment, a second support arm 115 may be further provided within the housing 110. Similar to the first support arm 114, the second support arm 115 may also be fixed to the inner wall of the housing 110, such as the inner wall of the cover 112 or the inner wall of the frame 111. The end of the second support arm 115 away from the inner wall of the housing 110 may be disposed proximate to the circumference of the adjustment rod 131. The sensor 150 may be disposed at this end of the second support arm 115, with a certain distance between the sensor 150 and the circumference of the adjustment rod 131. For example, the second support arm 115 may be located on a side of the limiting assembly 134 proximate to the first end of the adjustment rod 131.

[0129] The outer wall of the adjustment rod 131 may include multiple areas distributed along the circumferential direction, and the surface roughness of the multiple areas is different from each other. In one implementation, the multiple areas may be specifically located on the outer wall of the first rod body 1311. The side of the sensor 150 facing the adjustment rod 131 includes a light source and a photosensitive area, wherein the light source can be used to emit light to the adjustment rod 131 so that the light is reflected on the outer wall of the adjustment rod 131, and the photosensitive area can be used to receive the reflected light. Since the roughness of each area of ​​the outer wall of the adjustment rod 131 is different, the degree of reflection of the light is also different. When the light is reflected by different areas of the adjustment rod 131, the reflected light received by the photosensitive area is also different, for example, it can be manifested as the wavelength of the reflected light in each area is different.

[0130] In some implementations, the sensor 150 may be integrated with a chip that can determine the area on the adjustment rod 131 that reflects light based on the reflected light received by the photosensitive area, and thus calculate the approximate rotation angle of the adjustment rod 131. It should be noted that along the circumference of the adjustment rod 131, each area on the outer wall of the adjustment rod 131 has a certain arc length. When the adjustment rod 131 rotates slightly, the light source may be directed to the same area on the outer wall of the adjustment rod 131 before and after the rotation. In this case, the rotation angle calculated by the chip does not change. Of course, in order to improve the detection accuracy of the sensor 150, the arc length of each area on the outer wall of the adjustment rod 131 along the circumference of the adjustment rod 131 can be as small as possible.

[0131] Continuing with reference to Figures 6 and 7, in the embodiment of the present application, the transmission assembly 132 can achieve torque transmission through a multi-stage gear pair. Along the direction of torque transmission, the first stage gear pair in the multi-stage gear pair can be used to be transmission-connected with the adjustment rod 131 in a meshed state, and disconnected from the adjustment rod 131 in a non-meshed state. The last stage gear pair in the multi-stage gear pair can be transmission-connected with the second barrel 1212 of the lens barrel 121. In this way, the torque of the adjustment rod 131 can be sequentially transmitted to the second barrel 1212 through each stage of the gear pair to drive the second barrel 1212 to rotate.

[0132] In addition, the transmission assembly 132 may include a housing 1321, within which at least one gear pair of the transmission assembly 132 may be mounted. Lubricating oil may also be provided within the housing 1321 to lubricate the gear pair and reduce wear on the transmission assembly 132. A first opening 132101 and a second opening 132102 may be provided on the two axial end surfaces of the housing 1321 along the adjustment rod 131, respectively. The adjustment rod 131 is partially located within the housing 1321, with the first end of the adjustment rod 131 extending outward through the first opening 132101 and the second end of the adjustment rod 131 extending outward through the second opening 132102. Oil seals may be provided at the first opening 132101 and the second opening 132102, respectively, to reduce the risk of lubricating oil leakage within the housing 1321.

[0133] Referring to Figures 8 and 9 , Figure 8 illustrates a schematic diagram of the structure of a first adjustment mechanism 130a according to an embodiment of the present application in one state, and Figure 9 illustrates a schematic diagram of the structure of a first adjustment mechanism 130a according to an embodiment of the present application in another state. In this embodiment, along the direction of power transmission, the transmission assembly 132 may include a first-stage gear pair 1322, a second-stage gear pair 1323, a third-stage gear pair 1324, and a fourth-stage gear pair 1325. The fourth-stage gear pair 1325 is the final gear pair of the transmission assembly 132. Each gear pair is described below.

[0134] The first-stage gear pair 1322 includes a first gear 13221 and a second gear 13222. Both the first gear 13221 and the second gear 13222 are sleeved onto the adjustment rod 131, with the second gear 13222 located on the side of the first gear 13221 near the first end of the adjustment rod 131. The first gear 13221 is fixedly connected to the adjustment rod 131, while the second gear 13222 has a clearance fit with the adjustment rod 131, and the second gear 13222 is rotatably assembled to the housing. The first gear 13221 and the second gear 13222 can each be a face gear. The teeth of the first gear 13221 are disposed on the end face facing the second gear 13222, and the teeth of the second gear 13222 are disposed on the end face facing the first gear 13221. When the adjustment rod 131 is in the first state, there is a certain distance between the teeth of the first gear 13221 and the teeth of the second gear 13222, and the first gear 13221 and the second gear 13222 are not meshed. When the adjustment rod 131 is pulled to the second state, the first gear 13221 moves with the adjustment rod toward the second gear 13222, and the first gear 13221 and the second gear 13222 are meshed. In addition, to ensure a smooth connection between the first gear 13221 and the second gear 13222, the tooth tops of the teeth of the first gear 13221 can adopt a circular arc surface transition. Similarly, the tooth tops of the teeth of the second gear 13222 can also adopt a circular arc surface transition.

[0135] The second-stage gear pair 1323 includes a third gear 13231 and a fourth gear 13232. The third gear 13231 can be fixedly connected to the second gear 13222 and can be sleeved on the adjustment rod 131. The third gear 13231 is located on the side of the second gear 13222 facing away from the first gear 13221. The third gear 13231 and the adjustment rod 131 can also have a clearance fit. For example, the third gear 13231 and the second gear 13222 can be integrally formed. The fourth gear 13232 can be located on one side of the third gear 13231 in the circumferential direction and rotatably assembled to the housing. The third gear 13231 and the fourth gear 13232 can each be a cylindrical gear, meshing with each other via gear teeth disposed on their respective circumferential sides.

[0136] The third-stage gear pair 1324 includes a fifth gear 13241a and a sixth gear 13242a. Both the fifth gear 13241a and the sixth gear 13242a are rotatably mounted within the housing. The fifth gear 13241a is transmission-connected to the fourth gear 13232 via a universal joint 1326. The sixth gear 13242a is located on one side of the fifth gear 13241a. The fifth gear 13241a and the sixth gear 13242a can be cylindrical gears, meshing with each other via gear teeth disposed on their respective circumferences. In this solution, by connecting the fourth gear 13232 and the fifth gear 13241a through the universal joint 1326, variable-angle power transmission can be achieved between the fourth gear 13232 and the fifth gear 13241a, that is, the transmission component 132 can achieve variable-angle power transmission. This not only simplifies the structure of the transmission component 132, but also reduces the requirements for the setting positions of the starting end (adjustment rod 131) and the end end (second cylinder 1212) of the power transmission of the entire device, thereby helping to achieve a miniaturized design of the head-mounted display device.

[0137] Referring to Figure 10 , which is a schematic diagram of the structure of the universal joint shown in Figure 8 , in this embodiment, universal joint 1326 may include a first universal yoke 13261, a second universal yoke 13262, and a cross shaft 13263. First universal yoke 13261 is fixed to one end face of fourth gear 13232, second universal yoke 13262 is fixed to one end face of fifth gear 13241a, and two connecting shafts of cross shaft 13263 are respectively assembled in first universal yoke 13261 and second universal yoke 13262.

[0138] Referring again to Figures 6, 8, and 9, the fourth-stage gear pair 1325 is a bevel gear pair, comprising a first bevel gear 13251 and a second bevel gear 13252, which are located outside the housing 1321. The housing 1321 may be provided with a third opening 132103, in which a gear rod 1327 is mounted, with one end of the gear rod 1327 located inside the housing 1321 and the other end located outside the housing 1321. The gear rod 1327 can both slide axially along the third opening 132103 and rotate within the third opening 132103. The sixth gear 13242a can be mounted on the end of the gear rod 1327 located inside the housing 1321, and can drive the gear rod 1327 to rotate. The first bevel gear 13251 can be mounted on the end of the gear rod 1327 located outside the housing 1321, and is fixedly connected to the gear rod 1327. The second bevel gear 13252 is disposed on the circumference of the second cylindrical body 1212 and is fixedly connected to the second cylindrical body 1212. The teeth of the first bevel gear 13251 can rotate by rolling on the teeth of the second bevel gear 13252, driving the second bevel gear 13252 and the second cylindrical body 1212 to rotate.

[0139] The first bevel gear 13251 and the gear rod 1327 can be formed separately and then assembled and fixed, or they can be an integrally formed structure; the second bevel gear 13252 and the second cylinder 1212 can be formed separately and then assembled and fixed, or they can be an integrally formed structure.

[0140] Referring to Figures 9 and 11 , Figure 11 is a partial exploded schematic diagram of the lens barrel and transmission assembly provided in an embodiment of the present application. In this embodiment, the inner wall of the gear hole of the sixth gear 13242a may be provided with an axially extending guide protrusion 132421, and the outer wall of the gear rod 1327 may be provided with a guide groove 13271. After the sixth gear 13242a is assembled to the gear rod 1327, the guide protrusion 132421 can be correspondingly assembled within the guide groove 13271. The cooperation between the guide protrusion 132421 and the guide groove 13271 allows the sixth gear 13242a to drive the gear rod 1327 to rotate, thereby achieving torque transmission between the sixth gear 13242a and the gear rod 1327, and also releases the axial freedom of the gear rod 1327, allowing the gear rod 1327 and the first bevel gear 13251 to move axially along the gear rod.

[0141] There may be multiple guide protrusions 132421 and multiple guide grooves 13271, respectively. The multiple guide protrusions 132421 are distributed along the circumference of the inner wall of the gear hole of the sixth gear 13242a, and the multiple guide grooves 13271 are distributed along the circumference of the gear rod 1327. The multiple guide protrusions 132421 are assembled one-to-one in each guide groove 13271. In this design, the multiple guide grooves 13271 on the circumference of the gear rod 1327 can be regarded as external splines, and the multiple guide protrusions 132421 on the inner wall of the gear hole of the sixth gear 13242a can be regarded as internal splines. The connection between the sixth gear 13242a and the gear rod 1327 is a spline connection.

[0142] In addition, the circumference of the gear rod 1327 may be provided with a first boss 13272 and a second boss 13273, wherein the first boss 13272 is provided near the first bevel gear 13251, and the second boss 13273 is located on a side of the first boss 13272 away from the first bevel gear 13251. The lens barrel 121 may also include a first limiting wall 1214, which is provided on the circumference of the lens barrel 121 and is spaced apart from the second barrel 1212. Exemplarily, when the first barrel 1211 is provided with a flange 12112, the first limiting wall 1214 may be fixed to a side of the flange 12112 facing the second barrel 1212. The first bevel gear 13251 may be located between the first limiting wall 1214 and the outer wall of the second barrel 1212, so as to engage with the second bevel gear 13252 fixed to the second barrel 1212. The first boss 13272 and the second boss 13273 of the gear rod 1327 may be located on both sides of the first limiting wall 1214 , and both are in contact with the first limiting wall 1214 , thereby limiting the relative movement of the gear rod 1327 and the lens barrel 121 through the first limiting wall 1214 .

[0143] In some embodiments, the lens barrel 121 may further include a second limiting wall 1215, which may be fixed to a side of the first limiting wall 1214 facing away from the flange 12112. The second limiting wall 1215 and the first limiting wall 1214 may together form a hole-shaped structure, and the portion of the gear rod 1327 located between the first boss 13272 and the second boss 13273 is located within the hole-shaped structure. The second limiting wall 1215 and the first limiting wall 1214 jointly limit the gear rod, thereby helping to improve the meshing stability of the first bevel gear 13251 and the second bevel gear 13252 during movement of the first display assembly.

[0144] Of course, in other embodiments, the aforementioned limiting function can be achieved by providing an annular groove around the circumference of the gear rod 1327. In this case, the first limiting wall 1214 can be partially embedded in the annular groove, with both sides of the first limiting wall 1214 abutting against the side walls of the annular groove. Similarly, the second limiting wall 1215 can also be partially embedded in the annular groove, with both sides of the second limiting wall 1215 abutting against the side walls of the annular groove. In this way, the relative sliding of the gear rod 1327 and the lens barrel 121 can also be limited by the first limiting wall 1214 and the second limiting wall 1215.

[0145] When the user moves the first display assembly to adjust the pupil distance, the gear rod 1327 and the first bevel gear 13251 can move synchronously with the first display assembly through the limiting effect of the first limiting wall 1214 and the second limiting wall 1215 on the gear rod 1327. Therefore, the first bevel gear 13251 and the second bevel gear 13252 can always maintain an engaged state. Due to the sliding connection between the gear rod 1327 and the sixth gear 13242a, the sixth gear 13242a can also always maintain a transmission connection state with the first bevel gear 13251, thereby effectively improving the structural stability of the transmission assembly.

[0146] In combination with Figures 8 and 9, it can be seen from the above description that when the adjusting rod 131 is adjusted to the second state, the power transmission path of the transmission assembly 132 is as follows: the first gear 13221 receives the torque of the adjusting rod 131 and transmits it to the second gear 13222, which is then transmitted by the second gear 13222 to the third gear 13231, and then transmitted by the third gear 13231 to the fourth gear 13232 meshed therewith, and then transmitted by the fourth gear 13232 to the fifth gear 13241a through the universal joint 1326, and then transmitted by the fifth gear 13241a to the sixth gear 13242a meshed therewith, and further transmitted by the sixth gear 13242a to the first bevel gear 13251 through the gear rod 1327, and finally transmitted by the first bevel gear 13251 to the second bevel gear 13252 meshed therewith, driving the second cylinder 1212 to rotate through the second bevel gear 13252. Since the second barrel 1212 can drive the first lens to move during the rotation process, the rotational movement of the adjustment rod 131 in the second state can eventually be converted into the movement of the first lens in the second direction. That is to say, the adjustment rod 131 can receive the user's rotation operation in the second state, so that the first adjustment mechanism 130a can realize the myopia or hyperopia adjustment function.

[0147] Referring to Figure 12 , which is a partially exploded schematic diagram of a transmission assembly 132 provided in an embodiment of the present application, a housing 1321 may include a main body 13211 and a gear cover 13212 . The gear cover 13212 is connected to the main body 13211 and encloses the interior of the housing 1321 . To simplify assembly of the various gear pairs within the housing 1321 , multiple gear covers 13212 may be provided. For example, the housing shown in Figure 14 includes three gear covers 13212 . The three gear covers 13212 are defined as the first gear cover 13212a, the second gear cover 13212b and the third gear cover 13212c. The first gear cover 13212a is arranged on the side of the first end of the main body 13211 facing the adjusting rod 131, the second gear cover 13212b is arranged on the side of the second end of the main body 13211 facing the adjusting rod 131, and the third gear cover 13212c is arranged adjacent to the first gear cover 13212a and the second gear cover 13212b, and the third gear cover 13212c is fixedly connected to the main body 13211, the first gear cover 13212a and the second gear cover 13212b respectively.

[0148] In this embodiment, the body 13211 includes a first accommodating chamber 132111, into which the first gear 13221 and the second gear 13222 can be assembled. The side of the body 13211 facing the first gear cover 13212a can, together with the first gear cover 13212a, enclose a second accommodating chamber 132112. The second accommodating chamber 132112 is connected to the first accommodating chamber 132111, into which the third gear 13231 and the fourth gear 13232 can be assembled. The side of the body 132111 facing the second gear cover 13212b can, together with the second gear cover 13212b, enclose a third accommodating chamber 132113, into which the fifth gear 13241a and the sixth gear 13242a can be assembled. The side of the body 13211 facing the third gear cover 13212c can form a fourth accommodating chamber 132114 together with the third gear cover 13212c. The fourth accommodating chamber 132114 can be connected to the first accommodating chamber 132111 and the second accommodating chamber 132112 respectively, and the universal joint 1326 can be assembled in the fourth accommodating chamber 132114.

[0149] The following describes the assembly process of the display module provided by the embodiment of the present application in conjunction with Figures 7, 8 and 12. During assembly, first, the second gear 13222 and the third gear 13231 are sleeved on the second rod 1312, and the second rod 1312, the third gear 13231, the fourth gear 13232, the universal joint 1326, the fifth gear 13241a, and the sixth gear 13242a are assembled in the box 1321, and then the box 1321 is fixed to the cover; the first lens 1221 and the second lens 1222 are installed on the first cylinder 1211, and then the second cylinder 1212 is sleeved on the first cylinder 1211. outside; assemble the first bevel gear 13251 and the second bevel gear 13252 to the second cylinder 1212, and extend the gear rod 1327 of the first bevel gear 13251 into the box body 1321 to be assembled with the sixth gear 13242a, and then assemble the lens barrel 121 to the cover plate 112 through the first guide rail 1121; install the cover plate 112 in the frame body 111; finally, pass one end of the first rod body 1311 with the adjusting button 133 through the frame body 111 and fixedly connect it to the second rod body 1312 in the frame body 111.

[0150] Referring to Figure 13, Figure 13 is a schematic diagram of the structure of another first adjustment mechanism 130a provided in an embodiment of the present application. In this embodiment of the present application, the first adjustment mechanism 130a also includes an adjustment rod 131, a transmission assembly 132, and a limit assembly 134. The functions of the adjustment rod 131, transmission assembly 132, and limit assembly 134, as well as their arrangement within the display module 100, are similar to those of the aforementioned embodiment, with slight structural differences. The specific implementation of the first adjustment mechanism 130a will be described below in conjunction with Figures 13 to 21.

[0151] Referring to Figure 14, Figure 14 is a schematic diagram of a partial exploded structure of the first adjustment mechanism shown in Figure 13. In this embodiment, at the first end of the adjustment rod 131, in addition to the adjustment button 133, the first adjustment mechanism 130a may also include a follower 135 and a mounting seat 136. The adjustment button 133 has a first mounting groove 1331 on one side, into which the follower 135 can be mounted. Similarly, the follower 135 has a second mounting groove 1351 on the side facing away from the adjustment button 133, into which the mounting seat 136 is at least partially mounted. The first end of the adjustment rod 131 can pass through the mounting seat 136 and be fixedly connected to the follower 135.

[0152] In some embodiments, the inner wall of the first mounting groove 1331 has one or more slots 13311. Accordingly, the outer wall of the follower 135 has protrusions 1352 that correspond one-to-one with the slots 13311. When the follower 135 is installed in the first mounting groove 1331, each protrusion 1352 can be locked into the corresponding slot 13311, thereby achieving a fixed connection between the follower 135 and the adjustment button 133 through the cooperation between the protrusions 1352 and the slots 13311. Of course, in other embodiments, to simplify the assembly process of the first adjustment mechanism 130a, the follower 135 and the adjustment button 133 can also be an integrated structure.

[0153] In some embodiments, the bottom wall of the second mounting groove 1351 may be provided with a protrusion 13511, and the protrusion 13511 is provided with a special-shaped groove 135111. For example, the cross-sectional shape of the special-shaped groove 135111 can be any shape other than a circle, such as a diamond, square, sawtooth, etc.

[0154] In some embodiments, the first end of the adjustment rod 131 may have a shaped plug 1316 whose cross-sectional shape matches that of the shaped groove 135111. When the above components are assembled, the shaped plug 1316 of the adjustment rod 131 can pass through the mounting seat 136 and then be inserted into the shaped groove 135111 of the protrusion 13511. The cooperation between the shaped groove 135111 and the shaped plug 1316 can restrict the relative movement between the adjustment rod 131 and the follower 135, thereby allowing the follower 135 to synchronously drive the adjustment rod 131 when adjusting the adjustment knob 133. Of course, in other embodiments, the adjustment rod 131 and the follower can also be connected through threaded connections, adhesive bonding, or other methods.

[0155] In some embodiments, the mounting seat 136 may have a stepped structure along the axial direction of the adjustment rod 131. For example, the mounting seat 136 may include a first seat 1361 and a second seat 1362, with the diameter of the first seat 1361 being larger than the diameter of the second seat 1362. When the mounting seat 136 is assembled with the follower 135, the first seat 1361 of the mounting seat 136 may be located within the second mounting groove 1351 of the follower 135. A clearance fit may be provided between the first seat 1361 of the mounting seat 136 and the second mounting groove 1351 of the follower 135, allowing the follower 135 to rotate or move relative to the mounting seat 136. Furthermore, the first seat 1361 may be provided with an escape groove that allows for clearance of the protrusion 13511 within the second mounting groove 1351. The second seat body 1362 can be located outside the second mounting groove 1351 of the follower 135, and the second seat body 1362 can be provided with a mounting hole 13621, the mounting hole 13621 is communicated with the avoidance groove, the first end of the adjusting rod 131 can pass through the mounting hole 13621 and be connected to the protrusion 13511, and the adjusting rod 131 can rotate relative to the mounting seat 136.

[0156] When the adjustment rod 131 is mounted on the display module 100, similar to the previous embodiment, the housing of the display module 100 may be provided with a first through-hole, and the second base 1362 of the mounting base 136 may be fixed within the first through-hole. The first base 1361 of the mounting base 136, the follower 135 mounted on the first base 1361, and the adjustment button 133 mounted on the follower 135 are all located outside the housing. When the user pushes or pulls the adjustment button 133, the follower 135 drives the adjustment rod 131 to move relative to the mounting base 136, thereby switching the adjustment rod 131 between the first and second states. When the user rotates the adjustment button 133, the follower 135 drives the adjustment rod 131 to rotate relative to the mounting base 136.

[0157] In addition, in some embodiments, the first adjustment mechanism 130a may further include a sealing ring 1317, and a sealing groove 1317 may be provided on a portion of the circumferential side of the mounting hole 13621 of the adjusting rod 131 corresponding to the second seat body 1362. The sealing ring 137 may be partially accommodated in the sealing groove 1317, and along the radial direction of the adjusting rod 131, the sealing ring 1317 may be squeezed between the bottom of the sealing groove 1317 and the inner wall of the mounting hole 13621. This can not only improve the sealing of the shell at the mounting hole 13621, but also increase the damping of the adjusting rod 131 during movement or rotation, thereby helping to improve the user experience.

[0158] Referring also to FIG. 15 , FIG. 15 is a schematic diagram of a partial structure of the first adjustment mechanism 130a described in FIG. In the embodiment of the present application, the position-limiting assembly 134 may include a spring 1346 and a rotating member 1347 , both of which are mounted on structural components within the display module. For example, in the embodiment shown in FIG. 15 , the spring 1346 and the rotating member 1347 may be mounted on the housing 1321 of the transmission assembly 132 , thereby utilizing existing structural components within the display module as carriers for the spring 1346 and the rotating member 1347 , thereby simplifying the structure of the display module. Of course, in other embodiments, an independent structural component may be provided within the display module to support the position-limiting assembly 134 .

[0159] In this embodiment of the present application, the housing 1321 may include a first portion 13213 and a second portion 13214, which are arranged axially away from the adjusting knob 133. In a specific design, the second portion 13214 has a through-slot 132141 that extends radially through the second portion 13214 along the adjusting rod 131. In this case, the second portion 13214 functions as a hollow frame structure. The second end of the adjusting rod 131 may extend into the second portion 13214, and the second end of the adjusting rod 131 is exposed within the through-slot 132141 of the second portion 13214.

[0160] In some embodiments, the spring piece 1346 includes a fixing portion 13461 and a first elastic branch 13462. The fixing portion 13461 is fixedly connected to the second portion 13214 of the box body 1321, for example, but not limited to, by a fastener. The first elastic branch 13462 is fixedly connected to the fixing portion 13461, and one side of the first elastic branch 13462 has a first receiving groove 134621 and a second receiving groove 134622. The first receiving groove 134621 and the second receiving groove 134622 are separated by a limiting protrusion 134623, and the width of the first receiving groove 134621 is greater than the width of the second receiving groove 134622. In some embodiments, the spring piece 1346 may further include a second elastic branch 13463 , which is fixedly connected to the fixing portion 13461 , and an end of the second elastic branch 13463 is spaced apart from an end of the first elastic branch 13462 .

[0161] The rotating member 1347 can be disposed on a side of the fixed portion 13461 facing the housing 1321. The rotating member 1347 includes a rotating portion 13471 and a first rotating arm 13472 and a second rotating arm 13473 connected to the rotating portion 13471. The rotating portion 13471 is rotatably connected to the second portion 13214 of the housing 1321. The first rotating arm 13472 and the second rotating arm 13473 are arranged at an angle greater than 0 degrees and less than 180 degrees. The end of the first rotating arm 13472 can be disposed between the first elastic branch 13462 and the outer wall of the second portion 13214. The first rotating arm 13472 can be provided with a first limiting post 134721 on a side facing the first elastic branch 13462. The first limiting post 134721 can be received in the first receiving slot 134621 or the second receiving slot 134622. In addition, in the example where the spring piece 1346 includes the second elastic branch 13463 , the second rotating arm 13473 may be partially pressed between the second elastic branch 13463 and the outer wall of the second portion 13214 of the box body 1321 .

[0162] Referring to Figures 16 and 17 , Figure 16 illustrates a partial structural diagram of the limiting assembly 134 of the first adjustment mechanism 130a shown in Figure 13 in one state, and Figure 17 illustrates a partial structural diagram of the limiting assembly 134 of the first adjustment mechanism 130a shown in Figure 13 in another state. To clearly illustrate the relative positional relationship between the limiting assembly 134 and the adjustment rod 131, the housing is omitted in both Figures 16 and 17 . In this embodiment of the present application, a second limiting post 134731 may be provided at the end of the second pivoting arm 13473. This second limiting post 134731 may be located on the side of the second pivoting arm 13473 facing the housing. The adjustment rod 131 includes a slot 1318 around its periphery, into which the second limiting post 134731 of the second pivoting arm 13473 can be retained. Exemplarily, this slot 1318 may be an annular groove disposed along the circumference of the adjustment rod 131.

[0163] When the first limiting post 134721 of the first rotating arm 13472 is limited in the first receiving groove 134621 of the first elastic branch 13462, the adjusting rod 131 is in the first state. At this time, if the adjusting rod 131 is subjected to a pulling force and moves out of the housing, the adjusting rod 131 drives the rotating member 1347 to rotate clockwise via the second limiting post 134731. The position of the first limiting post 134721 of the first rotating arm 13472 also changes accordingly. The first limiting post 134721 is deformed by squeezing the first elastic branch 13462 and moves from the first receiving groove 134621 to the second receiving groove 134622, thereby adjusting the adjusting rod 131 to the second state. When the first limiting column 134721 of the first rotating arm 13472 is limited in the second receiving groove 134622 of the first elastic branch 13462, the adjusting rod 131 is in the second state. At this time, if the adjusting rod 131 is subjected to pressing force and moves into the interior of the shell, the adjusting rod 131 will drive the rotating member 1347 to rotate counterclockwise through the second limiting column 134731, and the position of the first limiting column 134721 of the first rotating arm 13472 will also change accordingly, and by squeezing the first elastic branch 13462 to deform and move from the second receiving groove 134622 to the first receiving groove 134621, the adjusting rod 131 is adjusted to the first state.

[0164] In addition, in order to reduce the risk of the first limiting column 134721 of the first rotating arm 13472 getting stuck in the first receiving groove 134621 or the second receiving groove 134622, so that the adjusting rod 131 can be smoothly switched between the first state and the second state, the limiting protrusion 134623 between the first receiving groove 134621 and the second receiving groove 134622 can have an arc-shaped surface, so that the first limiting column 134721 can move smoothly between the first receiving groove 134621 and the second receiving groove 134622 along the arc-shaped surface of the limiting protrusion 134623.

[0165] Please refer to Figure 15 again. In the embodiment of the present application, the electrical components in the display module, such as the button 140, the sensor (not shown in the figure), etc. can be carried on the second part 13214 of the box 1321, and the correspondence between the button 140 and the sensor and the adjustment rod 131 can be designed with reference to the aforementioned embodiments, that is, the button 140 is arranged toward the second end of the adjustment rod 131, and the sensor is provided with a light source and a photosensitive area. The side facing the outer wall of the adjustment rod 131, so that the adjustment rod 131 can achieve a function similar to that in the aforementioned embodiment in the first state.

[0166] In addition, in this embodiment, the width of the first receiving groove 134621 of the first elastic branch 13462 is greater than the diameter of the first limiting column 134721 of the first rotating arm 13472. In this way, when the adjusting rod 131 is in the first state, the first limiting column 134721 can move slightly in the first receiving groove 134621, thereby allowing the adjusting rod 131 to produce a small displacement under the action of pressing, so that the adjusting rod 131 can trigger the above-mentioned button 140 when being pressed in the first state, thereby realizing the input of the key signal.

[0167] Referring to Figures 18 and 19 , Figure 18 is a schematic diagram of the partial structure of the transmission assembly 132 of the first adjustment mechanism 130a shown in Figure 13 in one state, and Figure 19 is a schematic diagram of the partial structure of the transmission assembly 132 of the first adjustment mechanism 130a shown in Figure 13 in another state. In this embodiment, the transmission assembly 132 can also achieve torque transmission via a multi-stage gear pair. Along the direction of torque transmission, the first stage gear pair of the multi-stage gear pair can be used to be transmission-connected to the adjustment rod 131 in a meshed state and disconnected from the adjustment rod 131 in a non-meshed state. The last stage gear pair of the multi-stage gear pair can be transmission-connected to the second barrel of the lens barrel. In this way, the torque of the adjustment rod 131 can be transmitted to the second barrel through each stage gear pair in sequence, thereby driving the second barrel to rotate.

[0168] In a specific implementation, the transmission assembly 134 may include three gear pairs. Along the power transmission direction, the three gear pairs are respectively a first-stage gear pair 1322, a second-stage gear pair 1323, and a third-stage gear pair 1324. The first-stage gear pair 1322 and the second-stage gear pair 1323 may be installed within the housing 1321, and the third-stage gear pair 1324 may be located outside the housing 1321. The third-stage gear pair 1324 is the final gear pair of the transmission assembly 132. Each gear pair is described below.

[0169] The first-stage gear pair 1322 includes a first gear 13221 and a second gear 13222. Both the first gear 13221 and the second gear 13222 are sleeved onto the adjustment rod 131, with the second gear 13222 located on the side of the first gear 13221 near the first end of the adjustment rod 131. The first gear 13221 is fixedly connected to the adjustment rod 131, while the second gear 13222 has a clearance fit with the adjustment rod 131, and the second gear 13222 is rotatably assembled to the housing. The first gear 13221 and the second gear 13222 can each be a face gear. The teeth of the first gear 13221 are disposed on the end face facing the second gear 13222, and the teeth of the second gear 13222 are disposed on the end face facing the first gear 13221. When the adjustment rod 131 is in the first state, there is a certain distance between the teeth of the first gear 13221 and the teeth of the second gear 13222, and the first gear 13221 and the second gear 13222 are not meshed. When the adjustment rod 131 is pulled to the second state, the first gear 13221 moves with the adjustment rod 131 toward the second gear 13222, and the first gear 13221 and the second gear 13222 are meshed. In addition, to ensure a smooth connection between the first gear 13221 and the second gear 13222, the tooth tops of the teeth of the first gear 13221 can adopt a circular arc surface transition. Similarly, the tooth tops of the teeth of the second gear 13222 can also adopt a circular arc surface transition.

[0170] The second gear pair 1323 includes a third gear 13231 and a fourth gear 13232. The third gear 13231 can be fixedly connected to the second gear 13222. The third gear 13231 can be sleeved on the adjustment rod, and the third gear 13231 is located on the side of the second gear 13222 facing away from the first gear. The third gear 13231 and the adjustment rod 131 can also be a clearance fit. Exemplarily, the third gear 13231 and the second gear 13222 can be an integrally molded structure. The fourth gear 13232 can be located on one side of the third gear 13231 and rotatably assembled to the housing. The third gear 13231 and the fourth gear 13232 can each be a cylindrical gear, and the two can mesh with each other through gear teeth provided on their respective sides.

[0171] The third gear pair 1324 is a bevel gear pair, comprising a first bevel gear 13241b and a second bevel gear (not shown). The first bevel gear 13241b and the second bevel gear are located outside the housing. The first bevel gear 13241b is mounted on a gear rod 1327, which is connected to the fourth gear 13232 via a universal joint 1326. The second bevel gear is disposed on the circumference of the second cylinder and is fixedly connected to the second cylinder. The first bevel gear 13241b and the second bevel gear can be bevel gears, and the teeth of the first bevel gear 13241b can rotate the second bevel gear by rolling on the teeth of the second bevel gear.

[0172] In this embodiment, universal joint 1326 may include a first universal yoke 13261, a second universal yoke 13262, and a cross shaft 13263. First universal yoke 13261 is fixed to one end surface of fourth gear 13232, second universal yoke 13262 is slidably connected to gear rod 1327 of first bevel gear 13241b, and two connecting shafts of cross shaft 13263 are respectively assembled in first universal yoke 13261 and second universal yoke 13262. Exemplarily, the end of second universal yoke 13262 away from the cross shaft has a sleeve 132621, and gear rod 1327 is slidably assembled in sleeve 132621.

[0173] Referring to Figures 19 and 20 , Figure 20 is a partial exploded schematic diagram of the lens barrel and transmission assembly shown in Figure 13 . In this embodiment, the inner hole of the sleeve 132621 of the second universal joint yoke 13262 can be a special-shaped hole, and accordingly, the cross-section of the gear rod 1327 can be a special-shaped cross-section that matches the special-shaped hole. The cooperation between the gear rod 1327 and the sleeve 132621 allows the fourth gear 13232 to rotate the gear rod 1327, thereby driving the first bevel gear 13241b to rotate, achieving torque transmission between the fourth gear 13232 and the first bevel gear 13241b. This also frees up the axial freedom of the gear rod 1327 and the first bevel gear 13241b, allowing the gear rod 1327 and the first bevel gear 13241b to move axially along the gear rod 1327.

[0174] Of course, in some other embodiments, the gear rod 1327 and the sleeve 132621 of the second universal joint fork 13262 can also be connected by means of splines or the like, which will not be described in detail here.

[0175] The gear rod 1327 may also be provided with an annular groove 13274 on one side near the first bevel gear 13241b. The lens barrel 121 may include a first limiting wall 1214, which may be provided on the circumference of the lens barrel 121, and the first limiting wall 1214 and the lens barrel 121 are spaced apart. The first bevel gear 13241b may be located between the first limiting wall 1214 and the outer wall of the second barrel 1212, so as to facilitate engagement of the first bevel gear 13241b with the second bevel gear 13242b fixed to the second barrel 1212. The first limiting wall 1214 may be partially clamped in the annular groove 13274, and both sides of the first limiting wall 1214 respectively abut against the two side groove walls of the annular groove 13274, thereby limiting the relative movement of the gear rod 1327 and the lens barrel 121 through the first limiting wall 1214.

[0176] In some embodiments, the lens barrel 121 may further include a second limiting wall 1215, which may be disposed on a side of the first limiting wall 1214 facing the gear rod 1327. The second limiting wall 1215 is also partially disposed within the annular groove 13274, and both sides of the second limiting wall 1215 abut against the side walls of the annular groove 13274, thereby enabling the second limiting wall 1215 to also function as a limiter for the gear rod 1327. Exemplarily, the first limiting wall 1214 and the second limiting wall 1215 may be combined to form a hole-shaped structure, and a portion of the gear rod 1327 corresponding to the annular groove 13274 is located within the hole-shaped structure.

[0177] When the user moves the first display assembly to adjust the pupil distance, based on the cooperation between the first limiting wall 1214, the second limiting wall 1215 and the gear rod 1327, the gear rod 1327 and the first bevel gear 13241b can move synchronously with the first display assembly, so the first bevel gear 13241b and the second bevel gear 13242b can always maintain an engaged state, and due to the sliding connection between the gear rod 1327 and the second universal joint fork 13262, the fourth gear 13232 can also always maintain a transmission connection state with the first bevel gear 13241b through the universal joint 1326, thereby effectively improving the structural stability of the transmission assembly.

[0178] In conjunction with Figures 18 to 20, it can be seen from the above description that in this embodiment, when the adjustment rod is adjusted to the second state, the power transmission path of the transmission assembly is as follows: the first gear 13221 receives the torque of the adjustment rod 131 and transmits it to the second gear 13222, which is then transmitted by the second gear 13222 to the third gear 13231, and then by the third gear 13231 to the fourth gear 13232 meshing therewith, and then by the fourth gear 13232 through the universal joint 1326 to the first bevel gear 13241b, and then by the first bevel gear 13241b to the second bevel gear 13242b meshing therewith, which drives the second barrel 1212 to rotate via the second bevel gear 13242b. Since the second barrel 1212 can drive the first lens to move during rotation, the rotational movement of the adjustment rod 131 in the second state is ultimately converted into movement of the first lens in the second direction. In other words, the adjustment rod 131 can receive the user's rotational operation in the second state, so that the first adjustment mechanism 130a can achieve the myopia or hyperopia adjustment function.

[0179] Referring to Figure 21, Figure 21 is a partial exploded schematic diagram of the transmission assembly shown in Figure 13. In the embodiment of the present application, the housing 1321 may include a main body 13211 and a gear cover 13212, which are connected and enclosed to form the interior of the housing 1321. The first portion 13213 and the second portion 13214 of the housing 1321 may both belong to the main body 13211, and the gear cover may be provided on a side of the first portion facing away from the first portion. The main body 13211 includes a first accommodating cavity 132111, and the first gear 13221 and the second gear 13222 may be assembled in the first accommodating cavity 132111. The side of the body 13211 facing the first gear cover 13212a can form a second accommodating cavity 132112 together with the first gear cover 13212a. The second accommodating cavity 132112 is connected to the first accommodating cavity 132111. The third gear 13231 and the fourth gear 13232 can be assembled in the second accommodating cavity 132112.

[0180] As previously mentioned, the head-mounted display device may also include a processor for controlling the operation of the entire device. For example, in each of the above embodiments, the processor can be used to receive a signal sent by the electrical components of the head-mounted display device when the adjustment lever of the adjustment mechanism is triggered, upon determining that the head-mounted display device is not connected to the handle; and generate corresponding control instructions based on the type of signal, wherein the control instructions are used to control the display content of the display interface of the head-mounted display device. Based on this approach, the user can interact with the head-mounted display device directly through the adjustment mechanism without the help of a handle or gestures. In this way, the head-mounted display device can still be used even in scenes without a handle or in dim light, thereby effectively expanding the application scenarios of the head-mounted display device and improving the interactivity of the head-mounted display device in different scenarios.

[0181] In one implementation, the processor can determine whether the controller is disconnected based on the Bluetooth connection status between the head-mounted display device and the controller. In another implementation, the processor can determine whether the user is currently using the controller by determining whether the uploaded position and posture of the controller remain unchanged. If the position and posture of the controller remain unchanged for a long time, the head-mounted display device can be considered to be disconnected from the controller.

[0182] In the embodiment of the present application, the type of signal may include a press signal or a rotation signal, wherein the press signal may be generated when the button is pressed by the adjustment rod, and the rotation signal may be obtained by the sensor detecting the rotation state of the adjustment rod.

[0183] Referring to Figure 22a, Figure 22a illustrates a display interface of a head-mounted display device provided in an embodiment of the present application. In this embodiment, a user can activate a button by pressing the adjustment lever after adjusting the adjustment lever to a first state. Based on the press signal generated when the button is activated, the processor can generate a first control instruction. This first control instruction can control a cursor in the display interface to click an interactive control in the display interface, such as Application 1 in Figure 22a.

[0184] Referring to Figure 22b, Figure 22b illustrates another display interface of a head-mounted display device provided in an embodiment of the present application. In this embodiment, a user can activate a sensor by rotating the adjustment lever after adjusting it to a first state. Based on the rotation signal generated when the sensor is triggered, the processor can generate a second control instruction, which can control the sliding of the display interface.

[0185] In addition, in this embodiment, the processor is further configured to control a cursor in the display interface to point to an interactive control in the display interface based on the user's head movement or eye movement before receiving a signal sent by the electrical device when triggered by the adjustment lever. For example, in the embodiment shown in FIG22a, the processor may control the cursor in the display interface to point to Application 1 based on the user's head movement or eye movement, thereby controlling the cursor to click Application 1 to enter the application after receiving a press signal according to a generated first control instruction; or, in the embodiment shown in FIG22b, the processor may control the cursor in the display interface to point to a selection list based on the user's head movement or eye movement, thereby sliding the selection list according to a generated second control instruction after receiving a rotation signal.

[0186] In one implementation, if the processor controls cursor movement based on the user's head movements, the processor may control the head-mounted display device to project the cursor perpendicularly from the center of the display screen to interact with the display interface. If the processor controls cursor movement based on the user's eye movements, the processor may obtain the user's eye position information, and the cursor will indicate the location where the user is looking.

[0187] Based on the same concept, an embodiment of the present application further provides a display method for a head-mounted display device, as shown in FIG23 , the display method includes:

[0188] Step S101: When it is determined that the head mounted display device is not connected to the controller, receiving a signal sent by an electrical component of the head mounted display device when triggered by an adjustment mechanism of the head mounted display device;

[0189] Step S102: Generate a corresponding control instruction according to the type of the signal, where the control instruction is used to control the display content of the display interface of the head-mounted display device.

[0190] By applying the display method provided in the embodiments of the present application, the user can interact with the head-mounted display device without the help of a handle or through gestures, but can directly control the head-mounted display device through the adjustment mechanism. In this way, the head-mounted display device can still be used even in scenes without a handle or in dim light, thereby effectively expanding the application scenarios of the head-mounted display device and improving the interactivity of the head-mounted display device in different scenarios.

[0191] In some embodiments, the type of signal may include a press signal. In this case, the display method may specifically include:

[0192] A first control instruction is generated according to the pressing signal, and the first control instruction can control a cursor in the display interface to click on an interactive control in the display interface.

[0193] In some embodiments, the signal type may further include a rotation signal. In this case, the display method may specifically include:

[0194] A second control instruction is generated according to the rotation signal generated when the sensor is triggered, and the second control instruction can control the display interface to slide.

[0195] In some embodiments, the display method may further include:

[0196] Before receiving the signal sent by the electrical device when triggered by the adjustment lever, the cursor in the display interface is controlled to point to an interactive control in the display interface based on the user's head movement or eye movement. For example, to control the cursor movement based on the user's head movement, the cursor position can be determined by determining the position perpendicular to the center of the head-mounted display screen toward the display interface; the cursor position can be determined by determining the position the user is looking at based on the user's eye position information.

[0197] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An adjustment mechanism (130) of a head mounted display device, the adjustment mechanism (130) being mounted on a housing (110) of the head mounted display device, characterized in that: The adjusting mechanism (130) comprises an adjusting rod (131) and a transmission assembly (132), wherein the adjusting rod (131) has a first state and a second state, wherein: The adjusting rod (131) is used to disconnect from the transmission component (132) in the first state, and trigger the electrical device of the head mounted display device to send a signal when receiving a pressing or rotating operation; and the adjusting rod (131) is used to be connected to the transmission component (132) in the second state, and transmit power to the transmission component (132) when receiving a rotating operation; The transmission component (132) is used to receive power transmitted by the adjustment rod (131) and drive the display component (120) of the head mounted display device to perform myopia or hyperopia adjustment.

2. The adjustment mechanism (130) according to claim 1, characterized in that: The adjustment mechanism (130) further comprises a limit assembly (134), wherein the limit assembly (134) comprises an elastic arm (1341), and an end of the elastic arm (1341) comprises a protrusion (13411) arranged toward the peripheral side of the adjustment rod (131); A first limiting groove (1313) and a second limiting groove (1314) are arranged on the circumferential side of the adjusting rod (131); the first limiting groove (1313) and the second limiting groove (1314) are arranged at intervals along the axial direction of the adjusting rod (131); the adjusting rod (131) can slide relative to the limiting assembly (134); and the adjusting rod (131) is in the first state when the protrusion (13411) of the elastic arm (1341) is limited in the first limiting groove (1313); and the adjusting rod (131) is in the second state when the protrusion (13411) of the elastic arm (1341) is limited in the second limiting groove (1314).

3. The adjustment mechanism (130) according to claim 2, characterized in that: The limiting assembly (134) comprises a fixing frame (1342) and a limiting cover (1343); the fixing frame (1342) and the limiting cover (1343) are fixedly connected and enclosed to form a limiting hole (1344); the adjusting rod (131) is slidably disposed in the limiting hole (1344); The elastic arm (1341) is fixedly connected to the fixing frame (1342) or the limiting cover (1343).

4. The adjustment mechanism (130) according to claim 2 or 3, characterized in that: The first limiting groove (1313) and the second limiting groove (1314) are separated by a limiting step (1315), and both side end surfaces of the limiting step (1315) along the axial direction of the adjusting rod (131) respectively have chamfered structures.

5. The adjustment mechanism (130) according to any one of claims 2 to 4, characterized in that: The length of the first limiting groove (1313) along the axial direction of the adjusting rod (131) is greater than the length of the protrusion (13411) of the elastic arm (1341) along the axial direction of the adjusting rod (131).

6. The adjustment mechanism (130) according to claim 1, characterized in that: The adjustment mechanism (130) further comprises a limit assembly (134), wherein the limit assembly (134) comprises a spring sheet (1346) and a rotating member (1347), wherein the spring sheet (1346) is fixed to a structural member in the housing (110), and the spring sheet (1346) has a first receiving groove (134621) and a second receiving groove (134622) arranged at intervals; the rotating member (1347) comprises a rotating portion (13471) and a first rotating arm (13471) connected to the rotating portion (13471). 13472) and a second rotating arm (13473), the rotating portion (13471) rotates a structural member arranged in the housing (110), the first rotating arm (13472) has a first limiting column (134721), the first limiting column (134721) switches between the first receiving groove (134621) and the second receiving groove (134622) as the rotating member (1347) rotates, and the second rotating arm (13473) has a second limiting column (134731); The peripheral side of the adjusting rod (131) is provided with a slot (1318), and the slot (1318) is used to hold the second limiting column (134731). When the adjusting rod (131) slides, it drives the rotating member (1347) to rotate through the second limiting column (134731), and the adjusting rod (131) is in the first state when the first limiting column (134721) is limited in the first receiving groove (134621), and the adjusting rod (131) is in the second state when the first limiting column (134721) is limited in the second receiving groove (134622).

7. The adjustment mechanism (130) according to claim 6, characterized in that: The first receiving groove (134621) and the second receiving groove (134622) are separated by a limiting protrusion (134623), and the limiting protrusion (134623) has an arc surface.

8. The adjustment mechanism (130) according to claim 6 or 7, characterized in that: The width of the first receiving groove (134621) is greater than the diameter of the first limiting column (134721).

9. The adjustment mechanism (130) according to any one of claims 1 to 8, characterized in that: The transmission assembly (132) comprises a housing (1321) and a plurality of gear pairs which are sequentially connected in transmission. At least one gear pair is installed in the housing (1321), and along the transmission direction of the power, a first gear pair (1322) of the plurality of gear pairs is used for transmission connection with the adjustment rod (131) in a meshing state, and is disconnected from the adjustment rod (131) in a non-meshing state, and a last gear pair of the plurality of gear pairs is used for transmission connection with the display assembly (120) of the head mounted display device.

10. The adjustment mechanism (130) according to claim 9, characterized in that: The first-stage gear pair (1322) comprises a first gear (13221) and a second gear (13222); the first gear (13221) and the second gear (13222) are respectively sleeved on the adjusting rod (131); the first gear (13221) is fixedly connected to the adjusting rod (131); the second gear (13222) is clearance-matched with the adjusting rod (131); and the second gear (13222) is rotatably assembled in the box body (1321); the first gear (13221) and the second gear (13222) are respectively face gears; When the adjusting rod (131) is in the first state, the first gear (13221) and the second gear (13222) are spaced apart from each other; when the adjusting rod (131) is in the second state, the first gear (13221) and the second gear (13222) are meshed with each other.

11. The adjustment mechanism (130) according to claim 9 or 10, characterized in that: The last-stage gear pair is located outside the housing (1321), and comprises a first bevel gear (13251) and a second bevel gear (13252), wherein the first bevel gear (13251) is transmission-connected to a previous-stage gear pair of the last-stage gear pair, and the second bevel gear (13252) is fixedly connected to the display assembly (120).

12. The adjustment mechanism (130) according to claim 10 or 11, characterized in that: The transmission assembly (132) further comprises a second-stage gear pair (1323) and a third-stage gear pair (1324), wherein: The second-stage gear pair (1323) is a cylindrical gear pair, and the second-stage gear pair (1323) comprises a third gear (13231) and a fourth gear (13232), wherein the third gear (13231) and the fourth gear (13232) are respectively rotatably assembled on the box body (1321), and the third gear (13231) is fixedly connected to the second gear (13222); The third-stage gear pair (1324) is a cylindrical gear pair. The third-stage gear pair (1324) comprises a fifth gear (13241a) and a sixth gear (13242a). The fifth gear (13241a) and the sixth gear (13242a) are respectively rotatably assembled on the box body (1321). The fifth gear (13241a) is connected to the fourth gear (13232) through a universal joint (1326). The sixth gear (13242a) is connected to the driving wheel of the last-stage gear pair.

13. The adjustment mechanism (130) according to claim 12, characterized in that: The transmission assembly (132) further comprises a gear rod (1327), the gear rod (1327) extending from the inside of the box (1321) to the outside of the box (1321), the gear rod (1327) being slidably connected to the box (1321) and being rotatable relative to the box (1321), and the portion of the gear rod (1327) located inside the box (1321) having a special-shaped cross-section; The sixth gear (13242a) is slidably assembled on the portion of the gear rod (1327) located in the box body (1321), and the cross-sectional shape of the gear hole of the sixth gear (13242a) is the same as the cross-sectional shape of the special-shaped cross section; The driving wheel of the last-stage gear pair is fixed to the portion of the gear rod (1327) located outside the box (1321).

14. The adjustment mechanism (130) according to any one of claims 9 to 11, characterized in that: The transmission assembly (132) further comprises a second-stage gear pair (1323), wherein the second-stage gear pair (1323) is a cylindrical gear pair, and the second-stage gear pair (1323) comprises a third gear (13231) and a fourth gear (13232), wherein the third gear (13231) and the fourth gear (13232) are respectively rotatably assembled on the housing (1321), the third gear (13231) is fixedly connected to the second gear (13222), and the fourth gear (13232) is connected to the driving wheel of the last-stage gear pair via a universal joint transmission.

15. The adjustment mechanism (130) according to claim 14, characterized in that: The transmission assembly (132) further includes a gear rod (1327); The universal joint (1326) comprises a first universal joint fork (13261), a second universal joint fork (13262) and a cross shaft (13263), wherein the cross shaft (13263) is respectively assembled on the first universal joint fork (13261) and the second universal joint fork (13262), wherein the first universal joint fork (13261) is fixedly connected to the fourth gear (13232), and the second universal joint fork (13262) has a sleeve (132621) at one end away from the cross shaft (13263), wherein the inner hole of the sleeve (132621) is a special-shaped hole; One end of the gear rod (1327) is slidably assembled on the sleeve (132621), and the cross-sectional shape of the gear rod (1327) is the same as the cross-sectional shape of the special-shaped hole. The other end of the gear rod (1327) is fixedly connected to the driving wheel of the last-stage gear pair.

16. A head mounted display device, characterized in that: The invention comprises a housing (110), a display assembly (120) mounted on the housing (110), and an adjustment mechanism (130) according to any one of claims 1 to 15, wherein there are two display assemblies (120) and two adjustment mechanisms (130), respectively, and the two display assemblies (120) and the two adjustment mechanisms (130) are arranged in a one-to-one correspondence, wherein: The two display components (120) are arranged along a first direction; Each of the adjustment mechanisms (130) is arranged on a side of the corresponding display assembly (120) facing away from the other display assembly (120); an adjustment rod (131) of the adjustment mechanism (130) is slidably assembled on the housing (110); and the adjustment rod (131) has a first end exposed outside the housing (110); when the first end of the adjustment rod (131) moves close to the housing (110), the adjustment rod (131) is in the first state; when the first end of the adjustment rod (131) moves away from the housing (110), the adjustment rod (131) is in the first state. The adjusting rod (131) is in the second state.

17. The head mounted display device according to claim 16, wherein: The display assembly (120) comprises a lens barrel (121), a display screen, a first lens (1221) and a lens bracket (123); the display screen is fixed in the lens barrel (121); the first lens (1221) is carried by the lens bracket (123); the lens bracket (123) is slidably arranged in the lens barrel (121) along the axial direction of the lens barrel (121); the lens bracket (123) is transmission-connected to the transmission assembly (132); and the lens bracket (123) is used to slide in a direction approaching or moving away from the display screen under the drive of the transmission assembly (132).

18. The head mounted display device according to claim 17, wherein: The lens barrel (121) comprises a first barrel (1211) and a second barrel (1212); the first barrel (1211) is used to accommodate the display screen, the first lens (1221) and the lens holder (123); the first barrel (1211) is provided with a slide rail (12111) extending in the axial direction; a sliding pin (1231) is provided on the peripheral side of the lens holder (123); the sliding pin (1231) is slidably arranged on the slide rail (12111); The second cylinder (1212) is sleeved on the outer side of the first cylinder (1211), and the inner wall of the second cylinder (1212) is provided with a spiral slide groove (12121), and the end of the sliding pin (1231) extends out from the slide rail (12111) and is assembled in the slide groove (12121); the second cylinder (1212) is transmission-connected with the transmission assembly (132), and the second cylinder (1212) is used to rotate under the drive of the transmission assembly (132).

19. The head mounted display device according to any one of claims 16 to 18, characterized in that: The housing (110) comprises a frame (111) and a cover plate (112) fixed in the frame (111); the cover plate (112) is provided with a first guide rail (1121) and a second guide rail; the first guide rail (1121) and the second guide rail are arranged along the first direction, and the first guide rail (1121) and the second guide rail extend along the first direction respectively; One of the two display assemblies (120) is slidably mounted on the first guide rail (1121), and the other display assembly (120) is slidably mounted on the second guide rail.

20. The head mounted display device according to any one of claims 16 to 19, characterized in that: The electrical device of the head mounted display device comprises a button (140); a first support arm (114) is arranged in the housing (110); an end of the first support arm (114) is arranged close to the second end of the adjustment rod (131); and the button is fixed to a side of the first support arm (114) facing the second end of the adjustment rod (131); The adjusting rod (131) is used to trigger the button (140) when receiving a pressing operation in the first state.

21. The head mounted display device according to any one of claims 16 to 20, characterized in that: The electrical device of the head mounted display device further comprises a sensor (150); a second support arm (115) is arranged in the shell (110); an end of the second support arm (115) is arranged close to the peripheral side of the adjustment rod (131); the sensor (150) is arranged at the end of the second support arm (115); and the sensor (150) is used to detect a rotation signal of the adjustment rod (131).

22. The head mounted display device according to any one of claims 16 to 21, characterized in that: The head mounted display device further includes a processor, wherein the processor is configured to: When it is determined that the head mounted display device is in a state where the handle is not connected, receiving a signal sent by the electrical device when it is triggered by the adjustment mechanism; A corresponding control instruction is generated according to the type of the signal, and the control instruction is used to control the display content of the display interface of the head-mounted display device.

23. The head mounted display device according to claim 22, wherein: The processor is further configured to: Before receiving the signal sent by the electrical device when being triggered by the adjustment rod, the cursor in the display interface is controlled to point to the interactive control in the display interface according to the head movement or eye movement of the user.

24. The head mounted display device according to claim 22 or 23, characterized in that: The type of the signal includes a pressing signal; and the processor is configured to: A first control instruction is generated according to the pressing signal, where the first control instruction is used to control a cursor in the display interface to click an interactive control in the display interface.

25. The head mounted display device according to any one of claims 22 to 24, characterized in that: The type of the signal includes a rotation signal; and the processor is configured to: A second control instruction is generated according to the rotation signal, where the second control instruction is used to control the sliding of the display interface.

26. A display method for a head mounted display device, characterized in that: include: When it is determined that the head mounted display device is in a state where the handle is not connected, receiving a signal sent by an electrical device of the head mounted display device when being triggered by an adjustment mechanism of the head mounted display device; A corresponding control instruction is generated according to the type of the signal, and the control instruction is used to control the display content of the display interface of the head-mounted display device.

27. The display method according to claim 26, characterized in that: The display method further includes: Before receiving the signal sent by the electrical device when triggered by the adjustment mechanism, the cursor in the display interface is controlled to point to an interactive control in the display interface according to the user's head movement or eye movement.

28. The display method according to claim 26 or 27, characterized in that: The type of the signal includes a pressing signal; and the display method specifically includes: A first control instruction is generated according to the pressing signal, where the first control instruction is used to control a cursor in the display interface to click an interactive control in the display interface.

29. The display method according to any one of claims 26 to 28, characterized in that: The type of the signal includes a rotation signal; and the display method specifically includes: A second control instruction is generated according to the rotation signal, where the second control instruction is used to control the sliding of the display interface.

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