MR / AR head-mounted display

Abstract

The invention discloses an MR / AR head-mounted display, and relates to the technical field of AR and MR equipment, the MR / AR head-mounted display comprises a head-mounted display body, a key assembly, first rotating joints, second rotating joints, an elastic support, an eye distance adjusting mechanism and an open type dynamic earphone, the two sides of the head-mounted display body are movably connected with the first rotating joints, and the eye distance adjusting mechanism is installed in the first rotating joints; the first rotating joint is movably connected with a telescopic frame through an eye distance adjusting mechanism, one side of the telescopic frame is movably connected with second rotating joints, battery holders are installed between the second rotating joints, and a head circumference adjusting mechanism is installed between the battery holders; when a user rotates the eye distance adjusting knob, the eye distance adjusting knob can drive the transmission wheel on the rotating shaft to rotate, the transmission wheel is meshed with the transmission rack through a gear of the transmission wheel, the transmission rack can slide along the sliding rail, the transmission rack moves to drive the telescopic frame connected to the sliding rail to move front and back, and the eye distance of a display screen of the head display body is changed. The distance between the display screen and eyes can be accurately adjusted to obtain the best visual experience.

Description

Technical Field

[0001] The present invention relates to the technical field of AR and MR equipment, and in particular to MR / AR head displays. Background Art

[0002] MR / AR head display device is a wearable device that implements AR (Augmented Reality, also known as mixed reality) technology and can be worn on the human head for display. It uses AR (augmented reality) and VR (virtual reality) technologies, can display virtual information or objects in the real world, and can follow the user's movement to achieve interaction, superimpose virtual information on the real world, so that the real environment and virtual objects can be superimposed on the same screen in real time, realize the mutual complementation of the two information, and display the picture in front of the user through devices such as helmet displays, enhance the user's sense of reality, and can superimpose virtual data on the real-time image collected by the camera, and display the picture in front of the human eye through a micro-projection device, so as to realize a variety of application functions, such as navigation or displaying the parameters of surrounding buildings;

[0003] However, the discomfort and visual fatigue of existing MR / AR headsets may cause users to feel uncomfortable during use, affecting their willingness to use for a long time and reducing overall satisfaction. In situations where frequent adjustment of eye distance or interaction with the outside world is required, the complicated operation will cause users to waste time and affect work or entertainment efficiency. Inconvenient battery replacement and usage restrictions in strong light environments may cause users to choose not to use the device, reducing the frequency of use and practical value of the device. In addition, it is not convenient to adjust according to different head shapes and fatness, resulting in inconvenience in use, discomfort in wearing or the device slipping, affecting the user experience. Therefore, those skilled in the art provide MR / AR headsets to solve the problems raised in the above background technology. Summary of the invention

[0004] The purpose of the present invention is to provide an MR / AR head display to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The MR / AR head display comprises a head display body, a button assembly, a first rotating joint, a second rotating joint, an elastic bracket, an eye distance adjustment mechanism and an open dynamic earphone, wherein the first rotating joints are movably connected to both sides of the head display body, and the eye distance adjustment mechanism is installed in the first rotating joints, the first rotating joint is movably connected to a telescopic frame through the eye distance adjustment mechanism, a second rotating joint is movably connected to one side of the telescopic frame, a battery holder is installed between the second rotating joints, a replaceable battery is clamped on the battery holder, and a head circumference adjustment mechanism is installed between the battery holders, and an elastic bracket is arranged on one side of the second rotating joint close to the telescopic frame, and the elastic bracket is a C-shaped open-loop structure.

[0007] As a further solution of the present invention: the eye distance adjustment mechanism includes a first adjustment groove, a rotating shaft, a transmission wheel, a transmission rack, a limit groove, a slide rail, a limit rod and an eye distance adjustment knob, the first rotating joint is provided with a first adjustment groove, a rotating shaft is provided in the first adjustment groove, a transmission wheel is movably connected to the rotating shaft, one side of the transmission wheel is fixedly connected to the eye distance adjustment knob on the rotating shaft, a slide rail is provided in the first adjustment groove, and a telescopic frame is slidably connected to the slide rail.

[0008] As a further solution of the present invention: the telescopic frame is provided with a transmission rack in the first adjusting groove, the gears between the transmission rack and the transmission wheel are meshed with each other, a limiting groove is opened on the surface of the transmission rack, and a limiting rod is fixedly connected in the first adjusting groove, and the limiting rod is located in the limiting groove.

[0009] As a further solution of the present invention: a shading hood is detachably provided on one side of the head display body, and a cooling chamber is provided on the side of the head display body away from the shading hood, a cooling groove is provided in the cooling chamber, and a heat insulation plate is provided on the side of the cooling groove close to the head display body, and a plurality of heat dissipation holes are provided on the surface of the cooling chamber at equal distances.

[0010] As a further solution of the present invention: rotation grooves are provided on both sides of the second rotation joint, and the second rotation joint is movably connected to the telescopic frame through the rotation grooves.

[0011] As a further solution of the present invention: display screens are arranged on both sides below the head display body, signal lights are symmetrically arranged on the surface of the head display body, and cameras are symmetrically arranged on the surface of the head display body below the signal lights, and signals are connected between the cameras, signal lights and display screens.

[0012] As a further solution of the present invention: the head display body is provided with a fill light, a laser and a photoreceptor in sequence from left to right on the upper side of the signal light, the display screen is electrically connected to the replaceable battery, and button assemblies are symmetrically provided on both sides of the head display body close to the first rotating joint.

[0013] As a further solution of the present invention: the head circumference adjustment mechanism includes a second adjustment slot, an adjustment soft plate, a driving wheel, a head circumference adjustment knob and a movable rod, a battery seat is provided on the side of the second rotating joint close to the replaceable battery, a second adjustment slot is provided in the battery seat, a movable rod is movably connected in the second adjustment slot, a driving wheel is provided on the movable rod in the second adjustment slot, and the movable rod passes through a head circumference adjustment knob on one side of the battery seat.

[0014] As a further solution of the present invention: an adjustment soft plate is provided on one side of the second rotating joint on both sides, the adjustment soft plate is located inside the second adjustment groove, and the side of the adjustment soft plate close to the driving wheel is a rack structure, and the gears between the adjustment soft plate and the driving wheel are meshed with each other.

[0015] As a further solution of the present invention: a limit frame is arranged inside the telescopic frame, limit blocks are arranged on both sides of the limit frame, a damping shaft is arranged in the middle of the limit frame, and the limit frame is movably connected to the open dynamic earphone through the damping shaft.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. When the user rotates the eye distance adjustment knob, the eye distance adjustment knob drives the transmission wheel on the rotating shaft to rotate, and the transmission wheel meshes with the transmission rack through its gear, and the transmission rack slides along the slide rail. The movement of the transmission rack drives the telescopic frame connected to the slide rail to move forward and backward, changing the eye distance of the display screen of the head display body. The limit rod on the limit slot ensures that the transmission rack moves within the specified range, thereby controlling the maximum and minimum adjustment distances to avoid exceeding the design range. The user can accurately adjust the distance between the display screen and the eyes to obtain the best visual experience. The eye distance adjustment function is integrated into the head display body, avoiding external adjustment devices, reducing the complexity of the appearance, and improving the aesthetics and user convenience. Through the eye distance adjustment mechanism, the user can accurately adjust the distance between the display screen and the eyes to reduce visual fatigue and discomfort. The design of the eye distance adjustment knob and the gear system makes the adjustment process intuitive and easy, and the user can quickly adapt and adjust. Moreover, by accurately adjusting the eye distance, the user can wear the head display more comfortably to adapt to different vision needs and usage environments.

[0018] 2. The telescopic stand allows the user to conveniently interact with the outside world without completely removing the head display. During use, the user can quickly switch to the real environment for communication or operation, thereby improving the convenience of use and allowing the entire head display body to be flipped upward or lifted up, so that the user can lift the head display to an open state when needed, thereby achieving interaction with the outside world without affecting the wearing of the device. At the same time, by adjusting the rotation, the head display body is rotated on the first rotation joint to adjust the eye viewing angle. The user can adapt to different visual scenes according to personal needs, thereby improving the personalized experience, allowing the head display to play a role in various occasions such as work, entertainment, and social interaction, and improving the frequency and value of device use. By optimizing the wearing experience and quick switching, users can reduce fatigue during long-term use, thereby extending the use time.

[0019] 3. In a strong light environment, the headset may cause unclear vision and even affect the appearance and function of the device, which may increase the difficulty of use for female users in particular. The hood of the device can be removed to block external light when needed, so as to achieve the switching of MR, AR and VR visual function experience. During use, the presence of the heat dissipation holes helps release the heat generated by the headset during use to the outside to avoid overheating. The heat dissipation holes also allow air to flow, taking away moisture or heat generated inside the headset body, and maintaining the stability and comfort of the internal environment of the headset.

[0020] 4. The replaceable battery provides the convenience of battery replacement, allowing users to replace batteries during long-term use without stopping the use of the device or disassembling the entire headset. Users can easily replace the battery without using special tools, which not only improves the battery life of the device, but also simplifies the maintenance process. The fill light is used to provide additional lighting for the camera in low-light environments to ensure that the camera can capture clear images. The laser may be used for depth measurement, three-dimensional scanning or augmented reality projection. The photoreceptor is used to detect the intensity of ambient light and automatically adjust the brightness of the fill light to adapt to different lighting conditions. The button assembly allows the user to perform various operations and setting adjustments of the device, provides a convenient operation interface, and improves the user's operating experience and the ease of use of the device.

[0021] 5. The C-shaped open-loop bracket provides a stable fixing platform while allowing a certain degree of flexibility. This design ensures that the headset is more stable during wearing, reduces the deviation or shaking caused by head movement, enables the bracket to firmly support the entire device, and has sufficient durability to withstand the pressure of long-term use, making the wearing experience more comfortable and greatly improving its ergonomic characteristics.

[0022] 6. The limit frame and damping shaft in the telescopic frame allow the open dynamic headphones to be flexibly adjusted and used, providing a personalized audio experience, allowing users to adjust the sound field effect of the headphones according to their personal needs, while ensuring the stability of the headphones during wearing to meet the user's requirements for sound quality and comfort.

[0023] 7. When the head circumference adjustment knob is rotated, the movable rod rotates in the second adjustment slot, driving the driving wheel to rotate accordingly. The surfaces of the adjustment soft plates on both sides are designed with rack structures, which mesh with the gears on the driving wheels. The rotation of the driving wheels is transmitted to the adjustment soft plates through the gears, so that the adjustment soft plates can move horizontally along the second adjustment slot, limiting the movement range of the adjustment soft plates to prevent them from exceeding the preset range, thereby adjusting the size of the head circumference and avoiding wearing discomfort caused by different head shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of MR / AR headset.

[0025] Figure 2 This is the overall front view of the MR / AR headset.

[0026] Figure 3 This is a top view of the entire MR / AR headset.

[0027] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along the AA direction.

[0028] Figure 5 This is a schematic diagram of the structure of the head display body in the MR / AR head display.

[0029] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along the BB direction.

[0030] Figure 7 Schematic diagram of the coordination between open dynamic headphones and limit frames in MR / AR headsets.

[0031] Figure 8 Schematic diagram of the coordination between the second rotation joint and the replaceable battery in the MR / AR headset.

[0032] Fig. 9 This is a schematic diagram of the structure of the head circumference adjustment mechanism in the MR / AR headset.

[0033] In the figure: 1, head display body; 2, button assembly; 3, first rotating joint; 4, second rotating joint; 5, elastic bracket; 6, eye distance adjustment mechanism; 601, first adjustment slot; 602, rotating shaft; 603, transmission wheel; 604, transmission rack; 605, limit slot; 606, slide rail; 607, limit rod; 608, eye distance adjustment knob; 7, signal light; 8, head circumference adjustment mechanism; 801, second adjustment slot; 802, adjustment soft board; 803 , driving wheel; 804, head circumference adjustment knob; 805, movable rod; 9, camera; 10, telescopic frame; 11, cooling chamber; 12, open dynamic headphones; 13, limit frame; 14, limit block; 15, damping shaft; 16, hood; 17, display screen; 18, heat insulation board; 19, cooling tank; 20, heat dissipation hole; 21, rotating slot; 22, replaceable battery; 23, photoreceptor; 24, battery holder; 25, fill light; 26, laser. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example 1

[0036] Reference Figure 1 to Figure 4 This embodiment provides an MR / AR head display, including a head display body 1, a button assembly 2, a first rotating joint 3, a second rotating joint 4, an elastic bracket 5, an eye distance adjustment mechanism 6 and an open dynamic earphone 12, wherein the head display body 1 is movably connected with the first rotating joint 3 on both sides, and the eye distance adjustment mechanism 6 is installed in the first rotating joint 3, the first rotating joint 3 is movably connected with the telescopic frame 10 through the eye distance adjustment mechanism 6, and the second rotating joint 4 is movably connected to one side of the telescopic frame 10, a battery holder 23 is installed between the second rotating joints 4, a replaceable battery 22 is clamped on the battery holder 23, and a head circumference adjustment mechanism 8 is installed between the battery holders 23, and the second rotating joint 4 is provided with an elastic bracket 5 on one side close to the telescopic frame 10, and the elastic bracket 5 is a C-shaped open loop structure;

[0037] In this embodiment, specifically, the eye distance adjustment mechanism 6 includes a first adjustment slot 601, a rotating shaft 602, a transmission wheel 603, a transmission rack 604, a limit slot 605, a slide rail 606, a limit rod 607 and an eye distance adjustment knob 608. The first rotating joint 3 is provided with a first adjustment slot 601, a rotating shaft 602 is provided in the first adjustment slot 601, a transmission wheel 603 is movably connected to the rotating shaft 602, and a one side of the transmission wheel 603 is fixedly connected to the rotating shaft 602. The eye distance adjustment knob 608, a slide rail 606 is provided in the first adjustment slot 601, and a telescopic frame 10 is slidably connected to the slide rail 606;

[0038] The telescopic frame 10 is provided with a transmission rack 604 in the first adjustment slot 601, the transmission rack 604 and the transmission wheel 603 are meshed with each other, a limiting slot 605 is provided on the surface of the transmission rack 604, and a limiting rod 607 is fixedly connected in the first adjustment slot 601, and the limiting rod 607 is located in the limiting slot 605;

[0039] When the user rotates the eye-distance adjustment knob 608, the eye-distance adjustment knob 608 drives the transmission wheel 603 on the rotating shaft 602 to rotate, and the transmission wheel 603 meshes with the transmission rack 604 through its gear, and the transmission rack 604 slides along the slide rail 606. The movement of the transmission rack 604 drives the telescopic frame 10 connected to the slide rail 606 to move back and forth, thereby changing the eye-distance of the display screen 17 of the head display body 1. The limit rod 607 on the limit slot 605 ensures that the transmission rack 604 moves within the specified range, thereby controlling the maximum and minimum distances of the adjustment to avoid exceeding the design range. The user can accurately adjust the display screen 17. The distance between the display screen 17 and the eyes is adjusted to obtain the best visual experience. The eye distance adjustment function is integrated into the head display body 1, avoiding external adjustment devices, reducing the complexity of the appearance, and improving the aesthetics and user convenience of operation. Through the eye distance adjustment mechanism 6, the user can accurately adjust the distance between the display screen 17 and the eyes to reduce visual fatigue and discomfort. The design of the eye distance adjustment knob 608 and the gear system makes the adjustment process intuitive and easy, and the user can quickly adapt and adjust. Moreover, by accurately adjusting the eye distance, the user can wear the head display more comfortably and adapt to different vision needs and usage environments.

[0040] Example 2

[0041] Reference Figures 1 to 8 This embodiment is based on the previous embodiment, and is different from the previous embodiment in that a shading cover 16 is detachably provided on one side of the head display body 1, and a cooling chamber 11 is provided on the side of the head display body 1 away from the shading cover 16, a cooling tank 19 is provided in the cooling chamber 11, and a heat insulation plate 18 is provided on the side of the cooling tank 19 close to the head display body 1, and a plurality of heat dissipation holes 20 are provided on the surface of the cooling chamber 11 at equal distances;

[0042] The second rotating joint 4 has rotating grooves 21 on both sides, and the second rotating joint 4 is movably connected to the telescopic frame 10 through the rotating grooves 21;

[0043] The telescopic frame 10 allows the user to conveniently interact with the outside world without completely removing the head display body 1. During use, the user can quickly switch to the real environment for communication or operation, thereby improving the convenience of use, allowing the entire head display body part to be flipped upward or lifted, so that the user can lift the head display to an open state when needed, thereby realizing interaction with the outside world without affecting the wearing of the device. At the same time, by adjusting the rotation, the head display body 1 is rotated on the first rotating joint 3, thereby adjusting the eye viewing angle, and the user can adapt to different visual scenes according to personal needs, thereby improving the personalized experience, so that the head display can play a role in various occasions such as work, entertainment, and social interaction, and improving the frequency and value of the device. By optimizing the wearing experience and fast switching, the user can reduce fatigue during long-term use, thereby extending the use time;

[0044] Display screens 17 are arranged on both sides below the head display body 1, signal lights 7 are symmetrically arranged on the surface of the head display body 1, and cameras 9 are symmetrically arranged on the surface of the head display body 1 below the signal lights 7, and the cameras 9, the signal lights 7 and the display screen 17 are connected by signals;

[0045] The head display body 1 is provided with a fill light 25, a laser 26 and a photoreceptor 23 from left to right on the upper side of the signal light 7, the display screen 17 is electrically connected to the replaceable battery 22, and the button assembly 2 is symmetrically provided on one side of the two sides of the head display body 1 close to the first rotating joint 3;

[0046] The telescopic frame 10 is provided with a limit frame 13 inside, and limit blocks 14 are provided on both sides of the limit frame 13. A damping shaft 15 is provided in the middle of the limit frame 13, and the limit frame 13 is movably connected to the open dynamic earphone 12 through the damping shaft 15.

[0047] In a strong light environment, the head display may cause unclear vision and even affect the appearance and function of the device, which may increase the difficulty of use for female users in particular. The hood of the device can be removed to block external light when needed, so as to achieve the switching of MR, AR and VR visual function experience. In addition, during use, the presence of the heat dissipation holes helps to release the heat generated by the head display during use to the outside to avoid overheating. The heat dissipation holes also allow air to flow, taking away the moisture or heat generated inside the head display body, and maintaining the stability and comfort of the internal environment of the head display.

[0048] The replaceable battery 22 provides convenience for battery replacement, allowing users to replace batteries during long-term use without stopping the device or disassembling the entire head display. Users can easily replace batteries without using special tools, which not only improves the battery life of the device but also simplifies the maintenance process. The fill light 25 is used to provide additional lighting for the camera 9 in an environment with insufficient light to ensure that the camera can capture clear images. The laser 26 may be used for depth measurement, three-dimensional scanning or augmented reality projection. The photoreceptor 23 is used to detect the intensity of ambient light and automatically adjust the brightness of the fill light 25 to adapt to different lighting conditions. The button assembly 2 allows the user to perform various operations and setting adjustments of the device, provides a convenient operation interface, and improves the user's operating experience and the ease of use of the device.

[0049] The C-shaped open-loop bracket provides a stable fixing platform while allowing a certain degree of flexibility. This design ensures that the headset is more stable during wearing, reduces the deviation or shaking caused by head movement, and enables the bracket to firmly support the entire device. It is durable enough to withstand the pressure of long-term use, making the wearing experience more comfortable and greatly improving its ergonomic characteristics.

[0050] The limit frame 13 and the damping shaft 15 in the telescopic frame 10 enable the open dynamic earphone 12 to be flexibly adjusted and used, providing a personalized audio experience, allowing the user to adjust the sound field effect of the earphone according to personal needs, while ensuring the stability of the earphone during wearing to meet the user's requirements for sound quality and comfort.

[0051] Example 3

[0052] Reference Fig. 9 This embodiment is based on the previous embodiment, and is different from the previous embodiment in that the head circumference adjustment mechanism 8 includes a second adjustment slot 801, an adjustment soft plate 802, a driving wheel 803, a head circumference adjustment knob 804 and a movable rod 805, a battery holder 24 is provided on the side of the second rotating joint 4 close to the replaceable battery 22, a second adjustment slot 801 is provided in the battery holder 24, a movable rod 805 is movably connected in the second adjustment slot 801, the movable rod 805 is provided with a driving wheel 803 in the second adjustment slot 801, and the movable rod 805 passes through a head circumference adjustment knob 804 on one side of the battery holder 24;

[0053] An adjustment soft plate 802 is provided on one side of the second rotating joint 4 on both sides. The adjustment soft plate 802 is located inside the second adjustment groove 801, and the side of the adjustment soft plate 802 close to the driving wheel 803 is a rack structure, and the gears between the adjustment soft plate 802 and the driving wheel 803 are meshed with each other.

[0054] When the head circumference adjustment knob 804 rotates, the movable rod 805 rotates in the second adjustment slot 801, driving the driving wheel 803 to rotate accordingly. The surfaces of the adjusting soft plates 802 on both sides are designed with rack structures, which mesh with the gears on the driving wheel 803. The rotation of the driving wheel 803 is transmitted to the adjusting soft plate 802 through the gears, so that the adjusting soft plate 802 can move horizontally along the second adjustment slot 801, limiting the moving range of the adjusting soft plate 802 and preventing it from exceeding the preset range, thereby adjusting the size of the head circumference and avoiding wearing discomfort caused by different head shapes.

[0055] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0056] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. MR / AR head display, characterized by: The invention comprises a head display body (1), a button assembly (2), a first rotating joint (3), a second rotating joint (4), an elastic bracket (5), an eye distance adjustment mechanism (6) and an open dynamic earphone (12). The head display body (1) is movably connected with the first rotating joint (3) on both sides, and the eye distance adjustment mechanism (6) is installed in the first rotating joint (3). The first rotating joint (3) is movably connected with a telescopic frame (10) through the eye distance adjustment mechanism (6). The telescopic frame (10) is movably connected with the second rotating joint (4) on one side. A battery holder (23) is installed between the second rotating joints (4). A replaceable battery (22) is clamped on the battery holder (23). A head circumference adjustment mechanism (8) is installed between the battery holders (23). The second rotating joint (4) is provided with an elastic bracket (5) on one side close to the telescopic frame (10). The elastic bracket (5) is a C-shaped open loop structure.

2. The MR / AR head display according to claim 1, characterized in that: The eye-distance adjustment mechanism (6) comprises a first adjustment slot (601), a rotating shaft (602), a transmission wheel (603), a transmission rack (604), a limiting slot (605), a slide rail (606), a limiting rod (607) and an eye-distance adjustment knob (608); the first rotating joint (3) is provided with a first adjustment slot (601); a rotating shaft (602) is provided in the first adjustment slot (601); a transmission wheel (603) is movably connected to the rotating shaft (602); a side of the transmission wheel (603) is fixedly connected to the rotating shaft (602) with an eye-distance adjustment knob (608); a slide rail (606) is provided in the first adjustment slot (601); and a telescopic frame (10) is slidably connected to the slide rail (606).

3. The MR / AR head display according to claim 2, characterized in that: The telescopic frame (10) is provided with a transmission rack (604) in the first adjustment groove (601), the transmission rack (604) and the transmission wheel (603) are meshed with each other, a limiting groove (605) is provided on the surface of the transmission rack (604), and a limiting rod (607) is fixedly connected in the first adjustment groove (601), and the limiting rod (607) is located in the limiting groove (605).

4. The MR / AR head display according to claim 1, characterized in that: A shading hood (16) is detachably provided on one side of the head display body (1), and a cooling chamber (11) is provided on the side of the head display body (1) away from the shading hood (16), a cooling groove (19) is provided in the cooling chamber (11), and a heat insulation plate (18) is provided on the side of the cooling groove (19) close to the head display body (1), and a plurality of heat dissipation holes (20) are provided on the surface of the cooling chamber (11) at equal distances.

5. The MR / AR head display according to claim 1, characterized in that: Rotation slots (21) are provided on both sides of the second rotation joint (4), and the second rotation joint (4) is movably connected to the telescopic frame (10) via the rotation slots (21).

6. The MR / AR head display according to claim 1, characterized in that: Display screens (17) are arranged on both sides below the head display body (1), signal lights (7) are symmetrically arranged on the surface of the head display body (1), and cameras (9) are symmetrically arranged on the surface of the head display body (1) below the signal lights (7), and signals are connected between the camera (9), the signal lights (7) and the display screen (17).

7. The MR / AR head display according to claim 6, characterized in that: The head display body (1) is provided with a fill light (25), a laser (26) and a photoreceptor (23) in sequence from left to right on the upper side of the signal light (7), the display screen (17) is electrically connected to a replaceable battery (22), and button assemblies (2) are symmetrically provided on both sides of the head display body (1) near the first rotating joint (3).

8. The MR / AR head display according to claim 1, characterized in that: The head circumference adjustment mechanism (8) comprises a second adjustment slot (801), an adjustment soft plate (802), a driving wheel (803), a head circumference adjustment knob (804) and a movable rod (805); a battery seat (24) is provided on a side of the second rotating joint (4) close to the replaceable battery (22); a second adjustment slot (801) is provided in the battery seat (24); a movable rod (805) is movably connected in the second adjustment slot (801); the movable rod (805) is provided with a driving wheel (803) in the second adjustment slot (801); and the movable rod (805) passes through a side of the battery seat (24) and is provided with a head circumference adjustment knob (804).

9. The MR / AR head display according to claim 8, characterized in that: An adjustment soft plate (802) is provided on one side of the second rotating joint (4) on both sides. The adjustment soft plate (802) is located inside the second adjustment groove (801), and the side of the adjustment soft plate (802) close to the driving wheel (803) is in a rack structure, and the gears between the adjustment soft plate (802) and the driving wheel (803) are meshed with each other.

10. The MR / AR head display according to claim 1, characterized in that: A limit frame (13) is arranged inside the telescopic frame (10), limit blocks (14) are arranged on both sides of the limit frame (13), a damping shaft (15) is arranged in the middle of the limit frame (13), and the limit frame (13) is movably connected to the open dynamic earphone (12) via the damping shaft (15).

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