VR teaching head-mounted display adaptive focal length adjusting device

Abstract

The invention relates to the technical field of VR head-mounted display equipment, in particular to a VR teaching head-mounted display self-adaptive focal length adjusting device which comprises a shell, horizontally moving display screens are symmetrically arranged on one side in the shell, each display screen is provided with a lens assembly, a mounting frame is arranged in the shell, a driving assembly is arranged on the mounting frame, and the driving assembly is provided with a lens assembly. A movable shaft is arranged on the driving assembly, the driving assembly is used for driving the movable shaft to rotate and translate, and a first gear, a second gear and a third gear are sequentially in key connection with the movable shaft. When the first transmission gear is meshed with the first gear, the distance between the right side lens and the right eye of a user can be adjusted, when the second transmission gear is meshed with the second gear, the distance between the left side lens and the left eye of the user can be adjusted, and when the synchronous gear is meshed with the third gear, the distances between the two side lenses and the two eyes of the user can be synchronously adjusted.

Description

Technical Field

[0001] This invention relates to the technical field of VR headsets, and more particularly to an adaptive focus adjustment device for VR educational headsets. Background Technology

[0002] With the continuous development of virtual reality (VR) and artificial intelligence (AI) technologies, the teaching models and methods of professional courses in universities have undergone tremendous changes. For example, some universities have built virtual simulation experimental teaching centers to promote the integration of virtual reality technology with teaching. To further enhance the immersive experience of virtual simulation teaching, VR headsets are currently used as interactive teaching devices.

[0003] In existing VR headsets, the distance between most lens components and the display screen is fixed, and the focus cannot be adjusted, resulting in an inability to see a clear image. Over time, this can cause adverse reactions such as eye fatigue and dizziness, reducing the user experience and affecting normal use. Summary of the Invention

[0004] To overcome the above-mentioned shortcomings, the present invention provides an adaptive focus adjustment device for VR teaching headsets.

[0005] The technical implementation of this invention is as follows: A VR teaching headset adaptive focus adjustment device includes a housing, with horizontally movable display screens symmetrically arranged on one side of the housing. Each display screen is equipped with a lens assembly. A mounting frame is provided inside the housing, and a drive assembly is provided on the mounting frame. The drive assembly is equipped with a movable shaft, which is used to drive the movable shaft to rotate and translate. A first gear, a second gear, and a third gear are sequentially keyed to the movable shaft. Rotary shafts located on both sides of the movable shaft are symmetrically rotatably connected to the mounting frame. A first transmission gear meshing with the first gear is keyed to one side of the rotating shaft, and a second transmission gear meshing with the second gear is keyed to the other side of the rotating shaft. Synchronous gears meshing with the third gear are keyed to both rotating shafts. A transmission assembly for focus adjustment is provided between the rotating shafts and the lens assemblies.

[0006] Furthermore, the lens assembly includes a connecting frame disposed on one side of the display screen. The connecting frame has a boss, and an adjusting sleeve is rotatably disposed on the boss. The adjusting sleeve has an internal thread, and a movable sleeve is disposed inside the adjusting sleeve. The movable sleeve has an external thread that matches the internal thread. The movable sleeve has a mounting ring, and a lens is mounted inside the mounting ring. A guide is disposed outside the mounting ring. On the other side of the housing, guide sleeves corresponding to the display screen are symmetrically disposed. The guide sleeves and the mounting ring are connected by the guides.

[0007] Furthermore, the guide member includes a guide groove formed within the guide sleeve and a guide block disposed on the edge of the mounting ring and matching the guide groove.

[0008] Furthermore, the drive assembly includes a motor, which is mounted on a mounting bracket and slidably connected to one end of a movable shaft. The other end of the movable shaft is rotatably connected to a connecting plate. An electric push rod connected to the connecting plate is mounted on the mounting bracket, and a controller for controlling the motor and the electric push rod is mounted on the outside of the housing.

[0009] Furthermore, the transmission assembly includes a first transmission wheel, which is mounted on an adjusting sleeve, and a second transmission wheel, which is mounted on a rotating shaft. A transmission belt is fitted between the first transmission wheel and the second transmission wheel.

[0010] Furthermore, a connecting rod is rotatably connected to the mounting bracket, and threaded rods are provided at both ends of the connecting rods. The external threads on the two threaded rods are arranged opposite to each other. Threaded sleeves are provided at the top of the two connecting frames, and internal threads matching the corresponding threaded rods are provided inside the threaded sleeves. A tensioning component for tensioning the transmission belt is provided inside the outer shell.

[0011] Furthermore, the tensioning assembly includes two fixed frames, which are symmetrically arranged on the top of the housing. A movable frame is slidably connected to the fixed frame, and a tensioning spring is sleeved between the fixed frame and the movable frame. A movable wheel is rotatably arranged on the movable frame, and a transmission belt is wound around the movable wheel.

[0012] Furthermore, the guide sleeve is provided with first guide rails on both sides, and the display screen is provided with second guide rails on both sides. The first and second guide rails are fixedly installed inside the housing. The guide sleeve moves along the first guide rail, and the display screen moves along the second guide rail.

[0013] Furthermore, one of the threaded rods is provided with a wheel on one side, the wheel extending out of the housing.

[0014] The present invention has the following advantages: 1. When the first transmission gear meshes with the first gear, the distance between the right lens and the user's right eye can be adjusted; when the second transmission gear meshes with the second gear, the distance between the left lens and the user's left eye can be adjusted; when the synchronizing gear meshes with the third gear, the distance between both lenses and the user's eyes can be adjusted synchronously.

[0015] 2. The distance between the two lens components can be adjusted by manually rotating the dial in both directions, so that the device can adapt to the different interpupillary distances of each person;

[0016] 3. The transmission belt is tensioned by the elastic force of the tension spring through the set movable wheel to prevent the transmission belt from detaching from the first transmission wheel and the second transmission wheel. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural cross-sectional view of the outer casing of the present invention.

[0019] Figure 3 This is a three-dimensional structural diagram of the interior of the outer shell of the present invention.

[0020] Figure 4 This is a three-dimensional structural unfolded view of the lens assembly of the present invention.

[0021] Figure 5 This is a three-dimensional structural diagram of the driving component of the present invention.

[0022] Figure 6 This is a three-dimensional structural diagram of the first gear, second gear, and third gear of the present invention.

[0023] Figure 7 This is a three-dimensional structural diagram of the transmission component of the present invention.

[0024] In the attached diagrams: 1-Outer shell, 101-Mounting bracket, 2-Display screen, 3-Connecting frame, 4-Boss, 5-Adjusting sleeve, 6-Moving sleeve, 7-Mounting ring, 8-Lens, 9-Guide block, 10-Guide sleeve, 11-Guide groove, 12-Moving shaft, 13-Rotating shaft, 14-First transmission gear, 141-First gear, 15-Second transmission gear, 151-Second gear, 16-Synchronous gear, 161-Third gear, 17-Motor, 18-Electric push rod, 19-Connecting plate, 20-First transmission wheel, 201-Second transmission wheel, 202-Moving wheel, 203-Transmission belt, 21-Moving frame, 22-Fixed frame, 23-Tension spring, 24-First guide rail, 25-Second guide rail, 26-Connecting rod, 27-Threaded rod, 28-Threaded sleeve, 29-Rotating wheel. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1: Refer to Figures 1-7A VR teaching headset adaptive focus adjustment device includes a housing 1. A horizontally movable display screen 2 is symmetrically arranged on one side of the housing 1. Second guide rails 25 are arranged on both sides of the display screen 2, and the second guide rails 25 are fixedly installed inside the housing 1. The display screen 2 moves laterally along the second guide rails 25. Each display screen 2 is equipped with a lens assembly 8. A mounting frame 101 is provided inside the housing 1. A drive assembly is provided on the mounting frame 101. A movable shaft 12 is provided on the drive assembly. The drive assembly is used to drive the movable shaft 12 to rotate and translate. A first gear 141, a second gear 151, and a third gear 161 are sequentially keyed to the movable shaft 12. Rotating shafts 13 located on both sides of the movable shaft 12 are symmetrically rotatably connected to the mounting frame 101. A first transmission gear 141 meshes with the first gear 141 on one side of the rotating shaft 13. When the first gear 141... When a transmission gear 14 meshes with a first gear 141, the first gear 141 drives the right-side rotating shaft 13 to rotate. A second transmission gear 15 meshes with a second gear 151 on the other side of the rotating shaft 13. When the second transmission gear 15 meshes with the second gear 151, the second gear 151 drives the left-side rotating shaft 13 to rotate. Both rotating shafts 13 are keyed with a synchronizing gear 16 that meshes with a third gear 161. When the synchronizing gear 16 meshes with the third gear 161, the two rotating shafts 13 rotate synchronously. The engagement of the first transmission gear 14 with the first gear 141, the engagement of the second transmission gear 15 with the second gear 151, and the engagement of the synchronizing gear 16 with the third gear 161 are all completed independently and do not interfere with each other. A transmission component for focal length adjustment is provided between the rotating shaft 13 and the lens assembly 8.

[0027] Reference Figure 4 The lens 8 assembly includes a connecting frame 3, which is located on one side of the display screen 2. The connecting frame 3 has a boss 4, and an adjusting sleeve 5 is rotatably mounted on the boss 4. The adjusting sleeve 5 has an internal thread, and a movable sleeve 6 is located inside the adjusting sleeve 5. The movable sleeve 6 has an external thread that matches the internal thread. The movable sleeve 6 has a mounting ring 7, and the lens 8 is mounted inside the mounting ring 7. The distance between the lens 8 on the mounting ring 7 and the user's eyes can be adjusted by the threaded engagement between the adjusting sleeve 5 and the movable sleeve 6. On the other side of the housing 1, a guide sleeve 10 is symmetrically arranged opposite to the display screen 2. The guide sleeve 10 has a first guide rail 24 on both sides, which is fixedly located inside the housing 1. The guide sleeve 10 moves laterally along the first guide rail 24. A guide member is located outside the mounting ring 7. The guide sleeve 10 and the mounting ring 7 are connected by the guide member. The guide member includes a guide groove 11 opened in the guide sleeve 10 and a guide block 9 located on the edge of the mounting ring 7 and matching the guide groove 11. The guide block 9 moves along the guide groove 11.

[0028] Reference Figure 5The drive assembly includes a motor 17, which is mounted on a mounting bracket 101. The output end of the motor 17 is provided with a sliding connector. A groove matching the sliding connector is opened in the movable shaft 12. The sliding connector extends into the groove and is slidably connected to one end of the movable shaft 12. The motor 17 drives the sliding connector to rotate the movable shaft 12. The other end of the movable shaft 12 is rotatably connected to a connecting plate 19. An electric push rod 18 connected to the connecting plate 19 is provided on the mounting bracket 101. The electric push rod 18 drives the connecting plate 19 to move the movable shaft 12. A controller for controlling the motor 17 and the electric push rod 18 is installed on the outside of the housing 1.

[0029] Reference Figure 7 The transmission assembly includes a first transmission wheel 20, which is mounted on the adjusting sleeve 5. A second transmission wheel 201 is mounted on the rotating shaft 13. A transmission belt 203 is fitted between the first transmission wheel 20 and the second transmission wheel 201. The movable shaft 12 drives the adjusting sleeve 5 to rotate and focus via the transmission assembly.

[0030] To accommodate different interpupillary distances, a connecting rod 26 is rotatably connected to the mounting bracket 101. Both ends of the connecting rod 26 are equipped with threaded rods 27, with the external threads on the two threaded rods 27 being oppositely arranged. Each of the two connecting frames 3 has a threaded sleeve 28 at its top, with an internal thread inside each sleeve matching the corresponding threaded rod 27. A rotating wheel 29 is located on one side of one of the threaded rods 27, extending out of the outer shell 1. Rotating the threaded rod 27 via the rotating wheel 29, and through the threaded engagement between the threaded rod 27 and the threaded sleeve 28, adjusts the distance between the two lens components 8, thus adapting to each individual's interpupillary distance. When the spacing between the lenses 8 is such that the transmission belt 203 is kept taut, a tensioning assembly for tensioning the transmission belt 203 is provided inside the housing 1. The tensioning assembly includes two fixed frames 22, which are symmetrically arranged at the top inside the housing 1. A movable frame 21 is slidably connected to the fixed frame 22. A tension spring 23 is sleeved between the fixed frame 22 and the movable frame 21. A movable wheel 202 is rotatably arranged on the movable frame 21. The transmission belt 203 is wound around the movable wheel 202. The transmission belt 203 is tensioned by the elastic force of the tension spring 23 through the movable wheel 202, so as to prevent the transmission belt 203 from detaching from the first transmission wheel 20 and the second transmission wheel 201.

[0031] Working principle: Refer to Figures 1-7When the focus needs to be adjusted, the electric push rod 18 is extended and retracted by the controller. The electric push rod 18 drives the movable shaft 12 to move back and forth through the connecting plate 19. The controller controls the motor 17 to drive the movable shaft 12 to rotate forward and backward. The movable shaft 12 drives the first gear 141, the second gear 151 and the third gear 161 to rotate forward and backward. When the first transmission gear 14 meshes with the first gear 141, the first gear 141 drives the right rotating shaft 13 to rotate forward and backward. The right rotating shaft 13 drives the right adjusting sleeve 5 to rotate forward and backward through the right transmission assembly, thereby adjusting the right mirror. The distance between the lens 8 and the user's right eye is adjusted by the following: When the second transmission gear 15 meshes with the second gear 151, the second gear 151 drives the left rotating shaft 13 to rotate in both directions. The left rotating shaft 13 drives the left adjusting sleeve 5 to rotate in both directions through the left transmission component, thereby adjusting the distance between the left lens 8 and the user's left eye. When the synchronous gear 16 meshes with the third gear 161, the two rotating shafts 13 rotate synchronously in both directions. The two rotating shafts 13 drive the adjusting sleeves 5 on both sides to rotate synchronously through the transmission components on both sides, thereby adjusting the distance between the two lenses 8 and the user's two eyes simultaneously.

[0032] When it is necessary to adjust the distance between the two lens components 8, the rotating wheel 29 is manually rotated in both directions. The rotating wheel 29 drives the threaded rods 27 and connecting rods 26 on both sides to rotate in both directions. Through the threaded engagement of the threaded rods 27 and the threaded sleeves 28, the distance between the two lens components 8 can be adjusted, so that the device can adapt to the different interpupillary distances of each person. At the same time, when adjusting the distance between the two lenses 8, in order to keep the transmission belt 203 taut, the movable wheel 202 uses the elastic force of the tension spring 23 to tension the transmission belt 203, preventing the transmission belt 203 from disengaging from the first transmission wheel 20 and the second transmission wheel 201.

[0033] The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the claims.

Claims

1. A VR teaching headset adaptive focus adjustment device, characterized by: The device includes a housing, within which horizontally movable display screens are symmetrically arranged on one side. Each display screen has a lens assembly. A mounting frame is located inside the housing, and a drive assembly is mounted on the mounting frame. The drive assembly has a movable shaft, which is used to drive the movable shaft to rotate and translate. A first gear, a second gear, and a third gear are sequentially keyed onto the movable shaft. Rotating shafts located on both sides of the movable shaft are symmetrically rotatably connected to the mounting frame. A first transmission gear meshing with the first gear is keyed onto one rotating shaft, and a second transmission gear meshing with the second gear is keyed onto the other rotating shaft. Synchronizing gears meshing with the third gear are keyed onto both rotating shafts. A transmission assembly for focus adjustment is provided between the rotating shafts and the lens assemblies.

2. The VR teaching head-mounted display adaptive focus adjustment device according to claim 1, characterized in that: The lens assembly includes a connecting frame disposed on one side of the display screen. A boss is provided on the connecting frame, and an adjusting sleeve is rotatably disposed on the boss. The adjusting sleeve has an internal thread, and a movable sleeve is disposed inside the adjusting sleeve. An external thread matching the internal thread is provided outside the movable sleeve. A mounting ring is provided on the movable sleeve, and a lens is installed inside the mounting ring. A guide is provided outside the mounting ring. A guide sleeve corresponding to the display screen is symmetrically disposed on the other side of the housing. The guide sleeve and the mounting ring are connected by the guide.

3. The VR teaching head-mounted display adaptive focus adjustment device according to claim 1, characterized in that: The guide component includes a guide groove formed within the guide sleeve and a guide block disposed on the edge of the mounting ring and matching the guide groove.

4. The VR teaching head-mounted display adaptive focus adjustment device according to claim 1, characterized in that: The drive assembly includes a motor, which is mounted on a mounting frame and slidably connected to one end of a movable shaft. The other end of the movable shaft is rotatably connected to a connecting plate. An electric push rod connected to the connecting plate is mounted on the mounting frame. A controller for controlling the motor and the electric push rod is mounted on the outside of the housing.

5. The VR teaching head-mounted display adaptive focus adjustment device according to claim 2, characterized in that: The transmission assembly includes a first transmission wheel, which is mounted on an adjusting sleeve, and a second transmission wheel, which is mounted on a rotating shaft. A transmission belt is fitted between the first transmission wheel and the second transmission wheel.

6. The VR teaching headset adaptive focus adjustment device according to claim 5, characterized in that: The mounting frame is rotatably connected to a connecting rod, and both ends of the connecting rod are provided with threaded rods. The external threads on the two threaded rods are arranged oppositely to each other. The top of the two connecting frames is provided with threaded sleeves, and the threaded sleeves are provided with internal threads that match the corresponding threaded rods. The housing is provided with a tensioning component for tensioning the transmission belt.

7. The VR teaching head-mounted display adaptive focus adjustment device according to claim 6, characterized in that: The tensioning assembly includes two fixed frames, which are symmetrically arranged on the top of the housing. A movable frame is slidably connected to the fixed frame. A tension spring is sleeved between the fixed frame and the movable frame. A movable wheel is rotatably arranged on the movable frame, and a transmission belt is wound around the movable wheel.

8. The VR teaching head-mounted display adaptive focus adjustment device according to claim 1, characterized in that: The guide sleeve is provided with first guide rails on both sides, and the display screen is provided with second guide rails on both sides. The first and second guide rails are fixedly installed inside the outer shell. The guide sleeve moves along the first guide rail, and the display screen moves along the second guide rail.

9. The VR teaching head-mounted display adaptive focus adjustment device according to claim 6, characterized in that: One of them A rotating wheel is provided on one side of the threaded rod, and the rotating wheel extends out of the outer shell.

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