Head-mounted device

Abstract

The application relates to the technical field of virtual image equipment. The application provides a head-mounted device. The application provides a head-mounted device. The head-mounted device comprises a main body frame, a lens seat, a lens and an adjusting piece. The main body frame is used for being worn on the head of a user. The lens seat is movably arranged on the main body frame. The lens is arranged on the lens seat. The lens seat drives the lens to move. The lens is used for displaying a virtual image. The adjusting piece is arranged on the lens seat. The adjusting piece can exert a pushing force on the lens seat, so that the exit pupil distance is prevented from increasing, and the observation range is prevented from being reduced. The exit pupil distance is the distance between the lens and the eyes of the user. The observation range is the range seen by the eyes of the user through the lens. The application provides a head-mounted device to prevent the observation range of the eyes from being reduced.

Description

Technical Field

[0001] This application relates to the field of virtual imaging equipment technology, and more specifically, to head-mounted devices. Background Technology

[0002] Virtual imaging devices can provide virtual images, but users need to look through the lenses of the device to see them. However, when the exit pupil distance increases, meaning the lenses of the virtual imaging device are farther from the user's eyes, the range of eye movement relative to the lenses decreases, resulting in a smaller field of vision and potentially making it impossible to see the entire virtual image. Summary of the Invention

[0003] In view of this, this application provides a head-mounted device to avoid reducing the field of vision of the eyes.

[0004] One embodiment of this application provides a head-mounted device. The head-mounted device includes a main frame, a lens mount, lenses, and an adjustment mechanism. The main frame is worn on a user's head. The lens mount is movably mounted on the main frame. The lenses are mounted on the lens mount. Movement of the lens mount causes movement of the lenses. The lenses are used to display virtual images. The adjustment mechanism is mounted on the lens mount. The adjustment mechanism can apply a pushing force to the lens mount, thereby preventing an increase in the exit pupil distance to avoid a reduction in the viewing range. The exit pupil distance is the distance between the lenses and the user's eyes. The viewing range is the range seen by the user's eyes through the lenses.

[0005] In the above embodiment, the user's eyes see the virtual image through the lens. The adjusting member applies a pushing force to the lens holder, moving the lens holder closer to the user's head or keeping it fixed in a position relative to the head, so that the lens cannot move away from the head. This prevents the exit pupil distance from increasing, avoids the observation range from decreasing, and prevents the proportion of the observation range relative to the virtual image from decreasing at the same distance, so as to keep the entire virtual image within the coverage of the observation range as much as possible, thereby seeing as much of the virtual image as possible.

[0006] In some embodiments of this application, the exit pupil distance has a set value. When the user wears an item in front of the user's eyes and blocks the lens so that the exit pupil distance cannot reach the set value, the adjusting member applies a pushing force to the lens holder, causing the lens to press against the item to prevent the exit pupil distance from increasing. When the user wears an item in front of the user's eyes but does not block the lens so that the exit pupil distance can reach the set value, the adjusting member fixes the lens holder relative to the main frame, maintaining the exit pupil distance at the set value to prevent it from increasing. When the user does not wear an item in front of the user's eyes, the adjusting member applies a pushing force to the lens, fixing the lens holder relative to the main frame to prevent the exit pupil distance from increasing.

[0007] In the above embodiments, when the exit pupil distance is a set value, the eye's observation range can completely cover the virtual image. If an object is worn in front of the eye and obstructs the lens, causing the exit pupil distance to be greater than the set value, the adjusting member applies a pushing force to the lens holder to move the lens against the object, bringing the lens as close to the eye as possible, thereby preventing the exit pupil distance from increasing further. Even with an object in front of the eye, the observation range is maintained at the maximum achievable range to see the entire virtual image. If the object in front of the eye does not obstruct the lens, or if no object is worn, the exit pupil distance can be at the set value. The adjusting member then applies a pushing force to the lens holder, fixing the lens position relative to the main frame, i.e., fixing the lens position relative to the eye. This prevents the exit pupil distance from increasing, ensuring the eye always sees the entire virtual image.

[0008] In some embodiments of this application, the adjusting member is an elastic member. One end of the elastic member is connected to the main frame, and the other end is connected to the lens mount. When the user wears the item in front of the user's eyes and blocks the lens so that the exit pupil distance cannot reach the set value, the elastic member applies an elastic force to the lens mount, causing the lens to press against the item. When the user wears the item in front of the user's eyes but does not block the lens so that the exit pupil distance can reach the set value, the elastic member is at its initial length, maintaining the exit pupil distance at the set value. When the user does not wear the item in front of the user's eyes, the elastic member is at its initial length, maintaining the exit pupil distance at the set value.

[0009] In the above embodiments, the two ends of the elastic element are connected to the main frame and the lens mount, respectively. The main frame is worn on the head, so the elastic element can apply an elastic force to the lens mount as a pushing force, causing the lens mount to move and driving the lens to move. If an object is worn in front of the eyes and obstructs the lens, the elastic force applied by the elastic element to the lens mount will cause the lens to tend to move closer to the eyes, thereby holding the lens against the object. This allows the lens to be as close to the eyes as possible, thus preventing the exit pupil distance from increasing further. Even when an object is worn in front of the eyes, the viewing range is maintained at the maximum achievable range to see the entire virtual image as much as possible. If the object worn in front of the eyes does not obstruct the lens or no object is worn, the exit pupil distance can be at a set value, and the elastic element can maintain its initial length. Regardless of whether the lens moves closer to or further away from the eyes, the elastic element can apply an elastic force to the lens mount to reset the lens mount, thereby fixing the position of the lens relative to the main frame, that is, fixing the position of the lens relative to the eyes. This prevents the exit pupil distance from increasing, thus allowing the eyes to always see the entire virtual image.

[0010] In some embodiments of this application, the elastic element is a spring.

[0011] In the above embodiments, the spring can extend or shorten to return itself to its initial length, thereby applying an elastic force to the lens mount and moving the lens mount while the spring returns to its original position.

[0012] In some embodiments of this application, the article is eyeglasses. Eyeglasses include at least one of myopia glasses, hyperopia glasses, reading glasses, astigmatism glasses, and non-prescription glasses.

[0013] In the above embodiments, since different eyes have different needs, different glasses need to be worn so that the eyes can see the virtual image provided by the lens. Therefore, the glasses are worn between the lens and the eye, which may affect the movement of the lens to the position where the exit pupil distance is a set value.

[0014] In some embodiments of this application, the head-mounted device further includes a pivot. The lens mount is rotatably connected to the main frame via the pivot, and the lens mount rotates relative to the main frame to change the exit pupil distance.

[0015] In the above embodiment, the adjusting member applies a pushing force to the lens mount to drive the lens mount to rotate relative to the main frame, thereby causing the lens to rotate relative to the main frame. Since the main frame is fixed relative to the eye, the lens can move closer to the eye while following the rotation of the lens mount, thereby changing the exit pupil distance to increase the observation range and allow the eye to see the entire virtual image as much as possible.

[0016] In some embodiments of this application, there is one lens mount, which has two lenses. The two lenses are used to display virtual images to the user's two eyes respectively. When the lens mount is rotated, the exit pupil distances of the two lenses are equal.

[0017] In the above embodiments, by using a lens mount to simultaneously move two lenses, the distance between the two lenses and their respective corresponding eyes changes synchronously, and the exit pupil distances of the two eyes are kept equal. This ensures that both eyes always see the same range of virtual image content, avoiding a situation where one eye can see the entire virtual image while the other eye cannot.

[0018] In some embodiments of this application, the head-mounted device further includes a slide rail and a slider, one of which is disposed on the main frame and the other on the lens mount. The slider is slidably disposed on the slide rail, so that the lens mount slides relative to the main frame to change the exit pupil distance.

[0019] In the above embodiment, the adjusting member applies a pushing force to the lens holder. Through the sliding cooperation between the slider and the slide rail, the lens holder is driven to slide relative to the main frame, thereby causing the lens to slide relative to the main frame. Since the main frame is fixed relative to the eye, the lens can move closer to the eye while following the sliding of the lens holder, thereby changing the exit pupil distance to increase the observation range and allow the eye to see the entire virtual image as much as possible.

[0020] In some embodiments of this application, the main frame includes a headband. The headband is for wrapping around the user's head. The lens mount is movable relative to the headband.

[0021] In the above embodiments, the headband is mounted on the head and can be stopped by the head in multiple directions to prevent movement, thereby keeping the headband in a fixed position relative to the head. When the lens mount moves relative to the headband, the lens mount can move relative to the head, thereby driving the lens to move relative to the eye, so that the lens can move closer to the eye, thereby changing the exit pupil distance, so as to increase the observation range and allow the eye to see the entire virtual image as much as possible.

[0022] In some embodiments of this application, the main frame further includes a fixing pad. The fixing pad is disposed on the headband. The fixing pad has a curved surface for abutting against the user's forehead to fix the headband relative to the user's head. The lens holder is movably disposed on the fixing pad.

[0023] In the above embodiments, the headband is equipped with a fixing pad. The combined effect of the headband being positioned around the head and the curved surface of the fixing pad resting against the user's forehead enhances the stability of the relative positions of the headband, fixing pad, and head. This ensures that when the lens mount moves relative to the fixing pad, causing the lens to move relative to the eye, the exit pupil distance is not affected by the movement of the headband and fixing pad relative to the head. This guarantees that the movement of the lens mount relative to the lens can stably change the exit pupil distance, thereby steadily increasing the field of view. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation on the scope.

[0025] Figure 1 This is a schematic diagram of the structure of a head-mounted device according to an embodiment of this application when it is worn on a user's head;

[0026] Figure 2 for Figure 1 A schematic diagram of a structure where there is an object between the head-mounted device and the eyes, but the object does not block the lenses;

[0027] Figure 3 for Figure 2 A schematic diagram of the structure when an object is stopped by a lens.

[0028] Explanation of key component symbols:

[0029] Head-mounted device 100

[0030] Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0032] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] This application provides a head-mounted device. The head-mounted device includes a main frame, a lens mount, lenses, and an adjustment mechanism. The main frame is worn on a user's head. The lens mount is movably mounted on the main frame. The lenses are mounted on the lens mount. Movement of the lens mount causes movement of the lenses. The lenses are used to display virtual images. The adjustment mechanism is mounted on the lens mount. The adjustment mechanism can apply a pushing force to the lens mount, thereby preventing an increase in the exit pupil distance to avoid a reduction in the viewing range. The exit pupil distance is the distance between the lenses and the user's eyes. The viewing range is the range seen by the user's eyes through the lenses.

[0036] The user's eyes see the virtual image through the lens. The adjustment component applies a pushing force to the lens mount, moving the lens mount closer to the user's head or keeping it fixed in a position relative to the head, so that the lens cannot move away from the head. This prevents the exit pupil distance from increasing, avoids the observation range from decreasing, and prevents the proportion of the observation range relative to the virtual image from becoming smaller at the same distance, so as to keep the entire virtual image within the coverage of the observation range as much as possible, thereby seeing as much of the virtual image as possible.

[0037] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0038] See Figure 1 One embodiment of this application provides a head-mounted device 100. The head-mounted device 100 includes a main frame 1, a lens mount 2, a lens 3, and an adjustment member 4. The main frame 1 is worn on the head 201 of a user 200. The lens mount 2 is movably mounted on the main frame 1. The lens 3 is mounted on the lens mount 2. Movement of the lens mount 2 causes movement of the lens 3. The lens 3 is used to display a virtual image 31. The adjustment member 4 is mounted on the lens mount 2. The adjustment member 4 can apply a pushing force to the lens mount 2, thereby preventing the exit pupil distance A from increasing, thus avoiding a decrease in the observation range 2021. The exit pupil distance A is the distance of the lens 3 relative to the user 200's eyes 202. The observation range 2021 is the range seen by the user 200's eyes 202 through the lens 3.

[0039] User 200's eyes 202 see the virtual image 31 through lens 3. Adjustment component 4 applies a pushing force to lens mount 2, moving lens mount 2 closer to user 200's head 201 or maintaining a fixed position relative to head 201, so that lens 3 cannot move away from head 201, thereby preventing the exit pupil distance A from increasing, avoiding the observation range 2021 from decreasing, and preventing the proportion of observation range 2021 relative to virtual image 31 from becoming smaller at the same distance, so as to make the virtual image 31 as fully as possible within the coverage of observation range 2021, thereby seeing the entire virtual image 31.

[0040] In some embodiments, the virtual image 31 includes, but is not limited to, AR virtual images, VR virtual images, and MR virtual images.

[0041] See Figures 1 to 3In some embodiments, the exit pupil distance A has a set value. When the exit pupil distance A is a set value, the observation range 2021 of the eye 202 can completely cover the virtual image 31. The set value is a preset value of the head-mounted device 100. For the same virtual image 31 displayed by the same head-mounted device 100, the position and size of the virtual image 31 relative to the lens 3 are fixed. For the same lens 3, and when its position relative to the eye 202 is fixed, the eye movement range of the eye 202 is fixed, that is, the observation range 2021 is fixed. If the position of the eye 202 exceeds the eye movement range, the line of sight of the eye 202 will be outside the range of the lens 3, that is, outside the observation range 2021, and therefore the virtual image 31 will definitely not be visible. If user 200 is wearing an object 300 in front of their eyes 202, or due to different head shapes of different users 200, or due to poor stability of the connection between the lens 3 and the main frame 1, the lens 3 will tend to move away from the eyes 202, causing the exit pupil distance A to tend to be greater than the set value, resulting in a tendency for the observation range 2021 to shrink. Therefore, it is necessary to avoid increasing the exit pupil distance A, otherwise the observation range 2021 will not be able to maintain the size of the screen that can fully view the virtual image 31.

[0042] In some embodiments, see Figure 3 When user 200 wears item 300 in front of user 200's eyes 202 and blocks lens 3, preventing the exit pupil distance A from reaching the set value, the adjusting member 4 applies a pushing force to the lens holder 2, causing lens 3 to abut against item 300, thereby preventing the exit pupil distance A from increasing. See also Figure 2 When user 200 wears item 300 in front of user 200's eyes 202, but not just blocking lens 3 so that the exit pupil distance A reaches the set value, adjustment member 4 fixes lens holder 2 relative to main frame 1, maintaining exit pupil distance A at the set value to prevent exit pupil distance A from increasing. See also Figure 1When user 200 is not wearing item 300 in front of user 200's eyes 202, adjustment component 4 applies a pushing force to lens 3, fixing lens mount 2 relative to main frame 1 to prevent the exit pupil distance A from increasing. If item 300 is worn in front of eyes 202 and obstructs lens 3, causing exit pupil distance A to be greater than the set value, adjustment component 4 applies a pushing force to lens mount 2 to move lens 3 against item 300, allowing lens 3 to be as close to eyes 202 as possible, thereby preventing exit pupil distance A from increasing further, and maintaining the observation range 2021 at the maximum achievable range even when item 300 is worn in front of eyes 202, so as to see the entire virtual image 31 screen as much as possible. If the item 300 worn in front of the eye 202 does not obstruct the lens 3 or if no item 300 is worn, the exit pupil distance A can be at the set value. Then the adjusting member 4 applies a pushing force to the lens holder 2, so that the position of the lens 3 relative to the main frame 1 is fixed, that is, the position of the lens 3 relative to the eye 202 is fixed. Then the exit pupil distance A cannot increase, so that the eye 202 can always see the entire virtual image 31.

[0043] In some embodiments, the adjusting member 4 is an elastic member 41. One end of the elastic member 41 is connected to the main frame 1, and the other end of the elastic member 41 is connected to the lens mount 2. See also Figure 3 When user 200 wears item 300 in front of user 200's eyes 202 and blocks lens 3, preventing the exit pupil distance A from reaching the set value, elastic member 41 applies elastic force to lens holder 2, causing lens 3 to abut against item 300. See also Figure 2 When user 200 wears item 300 in front of user 200's eyes 202 but not just blocking lens 3 so that the exit pupil distance A reaches the set value, elastic element 41 is at its initial length, maintaining the exit pupil distance A at the set value. See also Figure 1When user 200 is not wearing item 300 in front of user 200's eyes 202, elastic member 41 is at its initial length, maintaining the exit pupil distance A at a set value. The two ends of elastic member 41 are connected to the main frame 1 and lens mount 2, respectively. The main frame 1 is worn on the head 201, so elastic member 41 can apply an elastic force to lens mount 2 as a pushing force, causing lens mount 2 to move and thus moving lens 3. If item 300 is worn in front of eyes 202 and obstructs lens 3, the elastic force applied by elastic member 41 to lens mount 2 causes lens 3 to tend to move closer to eyes 202, thus allowing lens 3 to press against item 300. This allows lens 3 to be as close to eyes 202 as possible, preventing the exit pupil distance A from increasing further, and maintaining the observation range 2021 at the maximum achievable range even when item 300 is worn in front of eyes 202, so as to see the entire virtual image 31 screen as much as possible. If the object 300 worn in front of the eye 202 does not obstruct the lens 3 or if no object 300 is worn, the exit pupil distance A can be at the set value, and the elastic element 41 can maintain its initial length. No matter whether the lens 3 moves closer to or further away from the eye 202, the elastic element 41 can apply an elastic force to the lens holder 2 to reset the lens holder 2, thereby fixing the position of the lens 3 relative to the main frame 1, that is, fixing the position of the lens 3 relative to the eye 202. Therefore, the exit pupil distance A cannot increase, so that the eye 202 can always see the entire virtual image 31.

[0044] The elastic element 41 generates elastic force through elastic deformation. The elastic force provided by the elastic element 41 is an adaptive pushing force. The magnitude of the elastic force will adaptively change depending on the length of the elastic element 41's extension or contraction. Therefore, when the lens 3 is unobstructed at the exit pupil distance A, the elastic force of the elastic element 41 is zero. The further the exit pupil distance A of the lens 3 is from the set value, or the greater the obstruction encountered when the lens 3 returns to the position where the exit pupil distance A is the set value, the greater the elastic force of the elastic element 41 will adaptively increase accordingly. Thus, the user 200 does not need to actively adjust the elastic element 41 to achieve the elastic force exerted by the elastic element 41 on the lens mount 2, so that the lens 3 automatically adjusts to maintain the exit pupil distance A at the set value or at a distance closest to the set value, thereby avoiding a reduction in the observation range 2021.

[0045] See Figures 1 to 3 In some embodiments, the elastic element 41 is a spring. The spring extends or shortens to return to its initial length, thereby applying an elastic force to the lens mount 2 and moving the lens mount 2 as it returns to its original position. The initial length of the spring can be varied to accommodate different settings. It is understood that in other embodiments, the elastic element 41 is a rubber component, elastic cord, or other part capable of elastic deformation.

[0046] See Figures 2 to 3In some embodiments, the item 300 is eyeglasses. Eyeglasses include at least one of myopia glasses, hyperopia glasses, reading glasses, astigmatism glasses, and non-prescription glasses. Because different eyes 202 have different needs, different eyeglasses are required to enable the eyes 202 to clearly see the virtual image 31 provided by the lens 3. Therefore, the eyeglasses are worn between the lens 3 and the eye 202, which may affect the movement of the lens 3 to a position where the exit pupil distance A is a set value. It is understood that in other embodiments, the item 300 is a medical supply such as a bandage, an eye mask or other eye accessory that needs to be worn simultaneously in front of the eyes 202 when using the head-mounted device 100.

[0047] In other embodiments, the adjusting member 4 is a pneumatic member (not shown), which has an adjustable-sized pneumatic chamber that returns to its initial state under atmospheric pressure after a change in size, thus providing an adaptive driving force to move the lens mount 2. The adjusting member 4 can be any other component capable of providing an adaptive driving force without requiring active control of the lens mount 2 by the user 200.

[0048] See Figures 1 to 3 In some embodiments, the head-mounted device 100 also includes a pivot 5. The lens mount 2 is rotatably connected to the main frame 1 via the pivot 5, and the lens mount 2 rotates relative to the main frame 1 to change the exit pupil distance A. The adjustment member 4 applies a pushing force to the lens mount 2 to drive the lens mount 2 to rotate relative to the main frame 1, thereby causing the lens 3 to rotate relative to the main frame 1. Since the main frame 1 is fixed relative to the eye 202, the lens 3 can move closer to the eye 202 while rotating with the lens mount 2, thereby changing the exit pupil distance A, so as to increase the viewing range 2021 and allow the eye 202 to see the entire virtual image 31 as much as possible.

[0049] The lens holder 2 is rotatably connected to the main frame 1. The lens holder 2 moves by rotating. The adjusting component 4 drives the lens holder 2 to move by overcoming rolling friction, which has low resistance and is more conducive to the adjusting component 4 driving the lens holder 2 to move.

[0050] See Figures 1 to 3In some embodiments, there is one lens mount 2, which has two lenses 3. The two lenses 3 are used to display the virtual image 31 to the two eyes 202 of the user 200. When the lens mount 2 rotates, the exit pupil distance A of the two lenses 3 is equal. By moving the two lenses 3 simultaneously with one lens mount 2, the distance between the two lenses 3 and their respective eyes 202 changes synchronously, and the exit pupil distance A of the two eyes 202 is kept equal. This ensures that the two eyes 202 always see the same range of the virtual image 31, avoiding the situation where one eye 202 can see the entire virtual image 31 while the other eye 202 cannot.

[0051] See Figures 1 to 3 It is understood that in some embodiments, the point of application of the pushing force exerted by the adjusting member 4 on the lens holder 2 is on the same side of the rotating shaft 5 as the lens 3. The point of application of the pushing force exerted by the adjusting member 4 on the lens holder 2 is located between the rotating shaft 5 and the lens 3. This not only helps to reduce the volume of the lens holder 2 and prevent the lens holder 2 from extending in the opposite direction relative to the lens 3, but also ensures that the direction of the pushing force exerted by the adjusting member 4 on the lens holder 2 relative to the head 201 is the same as the direction of movement of the lens 3 relative to the head 201. This simplifies the assembly process by requiring only consideration of how to adjust the magnitude of the pushing force when setting up the adjusting member 4. For example, when the user 200 stands upright and wears the head-mounted device 100, in the vertical direction, the point of application of the pushing force exerted by the adjusting member 4 on the lens holder 2 is lower than the rotating shaft 5 and higher than the lens 3.

[0052] In some embodiments, the head-mounted device 100 further includes a slide rail (not shown) and a slider (not shown), one of which is disposed on the main frame 1 and the other on the lens mount 2. The slider is slidably disposed on the slide rail, causing the lens mount 2 to slide relative to the main frame 1 to change the exit pupil distance A. The adjusting member 4 applies a pushing force to the lens mount 2, and through the sliding engagement of the slider and the slide rail, drives the lens mount 2 to slide relative to the main frame 1, thereby causing the lens 3 to slide relative to the main frame 1. Since the main frame 1 is fixed relative to the eye 202, the lens 3 can move closer to the eye 202 while following the sliding of the lens mount 2, thereby changing the exit pupil distance A, so as to increase the viewing range 2021 and allow the eye 202 to see the entire virtual image 31 as much as possible.

[0053] See Figures 1 to 3In some embodiments, the main frame 1 includes a headband 11. The headband 11 is used to surround the head 201 of the user 200. The lens mount 2 is movable relative to the headband 11. The headband 11 is surrounded by the head 201 and can be stopped by the head 201 in multiple directions to prevent movement, thereby keeping the headband 11 in a fixed position relative to the head 201. When the lens mount 2 moves relative to the headband 11, the lens mount 2 can move relative to the head 201, thereby driving the lens 3 to move relative to the eye 202, so that the lens 3 can move closer to the eye 202, thereby changing the exit pupil distance A, so as to increase the viewing range 2021 and allow the eye 202 to see the entire virtual image as much as possible.

[0054] See Figures 1 to 3 In some embodiments, the main frame 1 further includes a fixing pad 12. The fixing pad 12 is disposed on the headband 11. The fixing pad 12 has an arc surface 121, which is used to abut against the forehead of the user 200 to fix the headband 11 relative to the head 201 of the user 200. The lens holder 2 is movably disposed on the fixing pad 12. The fixing pad 12 on the headband 11 enhances the stability of the relative position of the headband 11, the fixing pad 12 and the head 201 under the combined effect of the headband 11 surrounding the head 201 and the arc surface 121 of the fixing pad 12 abutting against the forehead of the user 200. This ensures that when the lens holder 2 moves relative to the fixing pad 12 and drives the lens 3 to move relative to the eye 202, the exit pupil distance A is not affected by the movement of the headband 11 and the fixing pad 12 relative to the head 201, thus ensuring that the movement of the lens holder 2 and the lens 3 can stably change the exit pupil distance A, so that the observation range 2021 can stably increase.

[0055] In this application, user 200's eyes 202 see the virtual image 31 through lens 3. Adjustment member 4 applies a pushing force to lens holder 2, moving lens holder 2 closer to user 200's head 201 or maintaining a fixed position relative to head 201, so that lens 3 cannot move away from head 201, thereby preventing the exit pupil distance A from increasing, avoiding the observation range 2021 from decreasing, and preventing the proportion of observation range 2021 relative to virtual image 31 from becoming smaller at the same distance, so as to make the virtual image 31 as fully as possible within the coverage of observation range 2021, thereby seeing the entire virtual image 31.

[0056] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

[0057] The information disclosed in the background section of this application is intended only to enhance the understanding of the overall background of this application and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

Claims

1. A head-mounted device, characterized in that: include: The main frame is designed to be worn on the user's head; The lens mount is movable within the main frame; A lens is disposed on the lens mount, and the movement of the lens mount causes the lens to move. The lens is used to display virtual images. An adjustment element is provided on the lens holder; The adjusting member can apply a pushing force to the lens mount to prevent the exit pupil distance from increasing, thereby avoiding a reduction in the observation range. The exit pupil distance is the distance between the lens and the user's eye, and the observation range is the range that the user's eye can see through the lens. The exit pupil distance has a set value, the adjusting member is an elastic member, one end of the elastic member is connected to the main frame, and the other end of the elastic member is connected to the lens mount. When the user wears an item in front of the user's eyes and blocks the lens, preventing the exit pupil distance from reaching the set value, the elastic element applies an elastic force to the lens holder, causing the lens to press against the item to prevent the exit pupil distance from increasing. When the user wears an item in front of the user's eyes but does not block the lens so that the exit pupil distance can reach the set value, the elastic member fixes the lens holder relative to the main frame. The elastic member is at its initial length, so that the exit pupil distance is maintained at the set value to prevent the exit pupil distance from increasing. When the user is not wearing the item in front of the user's eyes, the elastic element applies a pushing force to the lens, fixing the lens holder relative to the main frame. The elastic element is at its initial length, maintaining the exit pupil distance at the set value to prevent the exit pupil distance from increasing.

2. The head-mounted device according to claim 1, characterized in that: The elastic element is a spring.

3. The head-mounted device according to claim 1, characterized in that: The item is eyeglasses, which include at least one of the following: nearsighted glasses, farsighted glasses, reading glasses, astigmatism glasses, and non-prescription glasses.

4. The head-mounted device according to any one of claims 1-3, characterized in that: The head-mounted device also includes a rotating shaft, through which the lens mount is rotatably connected to the main frame, and the lens mount rotates relative to the main frame to change the exit pupil distance.

5. The head-mounted device according to claim 4, characterized in that: The lens holder is one in number, and the lens holder is provided with two lenses. The two lenses are used to display the virtual image to the user's two eyes respectively. When the lens holder is rotated, the exit pupil distances of the two lenses are equal.

6. The head-mounted device according to any one of claims 1-3, characterized in that: The head-mounted device also includes a slide rail and a slider, one of which is located on the main frame and the other is located on the lens mount. The slider is slidably located on the slide rail, so that the lens mount slides relative to the main frame to change the exit pupil distance.

7. The head-mounted device according to any one of claims 1-3, characterized in that: The main frame includes a headband for wrapping around the user's head, and the lens mount is movable relative to the headband.

8. The head-mounted device according to claim 7, characterized in that: The main frame also includes a fixing pad, which is disposed on the headband. The fixing pad has an arc surface, which is used to abut against the user's forehead so that the headband is fixed relative to the user's head. The lens holder is movably disposed on the fixing pad.

Images