CN114326122A

CN114326122A - Head-mounted display device

Info

Publication number: CN114326122A
Application number: CN202111601615.6A
Authority: CN
Inventors: 彭华军; 刘冬华; 王冲
Original assignee: Shenzhen Ned Optics Co Ltd
Current assignee: Shenzhen Ned Optics Co Ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-04-12
Anticipated expiration: 2041-12-24
Also published as: CN114326122B

Abstract

The invention relates to a head-mounted display device, which comprises a main body frame, wherein two display screens and two eyepieces are arranged on the main body frame and respectively opposite to the eyes of a wearer; the main body frame is provided with a diopter and interpupillary distance adjusting mechanism for adjusting the distance between the display screen and the ocular lens on one side and for adjusting the ocular lens on one side to move left or right; diopter and interpupillary distance adjustment mechanism are including setting up the knob subassembly in main body frame one side and setting up the subassembly of stirring in the adjacent one side with the knob subassembly, and diopter and interpupillary distance adjustment mechanism adopts knob subassembly's rotation and the slip operation of stirring the subassembly to realize wearing display device's diopter and interpupillary distance's regulation respectively. The knob subassembly sets up in one side of main body frame, stirs the subassembly setting and at the adjacent side of knob subassembly, and is rationally distributed, and the operation is convenient. Can independently correct to left eye, right eye difference respectively, the drive is adjusted the precision and is higher, has improved the use experience of intelligent glasses greatly.

Description

Head-mounted display device

Technical Field

The invention relates to the technical field of intelligent hardware, in particular to a head-mounted display device.

Background

With the continuous development of electronic devices towards ultra-miniaturization and the development of new computer, micro-electronics, photoelectric devices and communication theory and technology, the novel mode based on human-oriented and man-machine-in-one of wearable computing becomes possible. The method is continuously applied to the fields of military affairs, industry, medical treatment, education, consumption and the like. In a typical wearable computing system architecture, the head mounted display device is a key component. The head-mounted display device guides video image light emitted by a miniature image display (such as a transmission type or reflection type liquid crystal display, an organic electroluminescent device and a DMD device) to pupils of a user through an optical technology, realizes virtual and enlarged images in the near-eye range of the user, and provides visual and visible images, videos and character information for the user.

In order to achieve a better display effect, when a user wears the intelligent glasses, the user needs to tightly attach the eyes and the face around the eyes to the intelligent glasses, so that the user with poor eyesight can not use the glasses while using the intelligent glasses, the pictures seen by the user can be fuzzy, and the use experience is greatly influenced. Therefore, the smart glasses on the market at present provide diopter and interpupillary distance adjustment function for the user can adjust the diopter and the interpupillary distance of smart glasses after wearing smart glasses, makes the user need not to wear glasses when using smart glasses and also can see clear picture.

The diopter and interpupillary distance adjustment of the existing intelligent glasses mainly comprises the following adjustment modes: (1) the cam and the thread are arranged inside, and the manual roller is arranged outside for adjustment; (2) sliding adjustment is carried out through an external toggle key; (3) realize the binocular simultaneous control through the gear train, external manual gyro wheel is adjusted. However, these adjustment methods are not only inconvenient to operate and poor in driving precision, but also cannot independently correct the difference between the left eye and the right eye, and the use experience of the intelligent glasses is seriously affected.

Disclosure of Invention

The invention aims to solve the technical problems that diopter and interpupillary distance adjustment of the existing intelligent glasses has the defects of inconvenient operation, poor driving precision, incapability of independently correcting difference between a left eye and a right eye and the like, and provides a head-mounted display device aiming at the defects in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a head-mounted display device, which comprises a main body frame, wherein two display screens and two eyepieces are arranged on the main body frame and are respectively arranged relative to two eyes of a wearer; the main body frame is provided with a diopter and interpupillary distance adjusting mechanism for adjusting the distance between the display screen and the ocular lens on one side and for adjusting the ocular lens on one side to move left or right; diopter and interpupillary distance adjustment mechanism including set up the knob subassembly of main part frame one side and set up with the subassembly of stirring of the adjacent one side of knob subassembly, diopter and interpupillary distance adjustment mechanism adopt knob subassembly rotate with the slip operation of stirring the subassembly realizes wearing display device's diopter and interpupillary distance's regulation respectively.

Further, the toggle assembly comprises: the gear rack comprises a first rack, a toggle key arranged on the first rack, a first transmission gear meshed and connected with the first rack, a second transmission gear meshed and connected with the first transmission gear, and a second rack meshed and connected with the second transmission gear; the first rack, the first transmission gear and the second transmission gear are all arranged on the side wall of the main body frame; the second rack is disposed on the eyepiece surface.

Further, the knob assembly includes: the adjusting knob, the mounting bracket, the driving cam and the transmission slide block are arranged on the mounting bracket; one end of the driving cam penetrates into the mounting bracket, and the other end of the driving cam is in driving connection with the transmission slide block; the adjusting knob is connected with the driving cam through a screw; the mounting bracket is connected to the side wall of the main body frame adjacent to the first rack through a screw.

Further, a driving groove is formed in the driving cam; the transmission slide block is provided with a driving handle penetrating into the driving groove; the driving groove extends spirally from inside to outside.

Furthermore, a mounting groove is formed in the mounting bracket; a spring and a steel ball are arranged in the mounting groove; the surface of the driving cam is provided with a plurality of clamping grooves for containing the steel balls.

Further, a first cover plate is arranged on the outer side of the mounting groove.

Furthermore, a connecting hole is formed in the transmission sliding block; and a transmission shaft is arranged in the connecting hole.

Furthermore, a moving frame capable of reciprocating relative to the ocular is arranged on the ocular; the display screen is arranged in the movable frame; the movable frame is provided with a fixed hole; one end of the transmission shaft penetrates into the fixing hole.

Furthermore, a first motion shaft is arranged on the moving frame; a first guide block is arranged on the ocular; the first moving shaft is provided in the first guide block.

Furthermore, a first guide groove is formed in the transmission sliding block; and a guide shaft penetrating through the first guide groove is arranged on the side wall of the main body frame.

Further, the end part of the adjusting knob is provided with a dial.

Furthermore, a second cover plate located at the head end of the first rack and a third cover plate located at the tail end of the first rack are arranged on the side wall of the main body frame; the second cover plate and the third cover plate are both connected to the main body frame through screws; the first transmission gear and the second transmission gear are both positioned between the third cover plate and the main body frame.

Furthermore, a second guide groove is formed in the third cover plate; and a boss penetrating through the second guide groove is arranged on the second rack.

Furthermore, a sliding groove is arranged on the main body frame; the first rack is disposed in the sliding slot.

Further, a shell is arranged on the outer side of the main body frame; the toggle key penetrates through the shell and is connected with the first rack; the knob penetrates through the shell and is connected with the driving cam.

Furthermore, a second guide block and a second motion shaft are arranged on the ocular; the second motion shaft penetrates through the second guide block, and two ends of the second motion shaft are connected with the main body frame.

The invention has the beneficial effects that: the knob subassembly sets up in one side of main body frame, stirs the subassembly setting and at the adjacent side of knob subassembly, and is rationally distributed, and the operation is convenient. By rotating the knob assembly, the distance between the display screen on one side and the ocular can be adjusted, so that the diopter on one side can be adjusted in multiple stages. Through sliding the toggle assembly, the ocular of controllable unilateral moves left or right to adjust the interpupillary distance of both eyes. The rotating assembly and the stirring assembly are respectively distributed at different positions on the head-mounted display device, diopter and interpupillary distance can be more conveniently independently adjusted, the difference between the left eye and the right eye can be respectively and independently corrected, the driving adjustment precision is higher, and the use experience of the intelligent glasses is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only part of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the accompanying drawings:

fig. 1 is a schematic structural diagram of a head-mounted display device according to an embodiment of the invention;

FIG. 2 is a first schematic diagram illustrating a partial explosion structure of a head-mounted display device according to an embodiment of the present invention;

fig. 3 is a partial schematic structural diagram of a head-mounted display device according to an embodiment of the invention;

fig. 4 is a schematic diagram of a partial explosion structure of a head-mounted display device according to an embodiment of the invention;

fig. 5 is a partial schematic structural diagram of a head-mounted display device according to an embodiment of the invention;

FIG. 6 is a schematic cross-sectional view taken at A-A of FIG. 5 in accordance with an embodiment of the present invention;

FIG. 7 is a partial schematic view of a knob assembly according to an embodiment of the present invention;

fig. 8 is a schematic partial structural diagram of a head-mounted display device according to an embodiment of the invention;

FIG. 9 is an enlarged schematic view at B of FIG. 8 according to an embodiment of the present invention;

fig. 10 is a partial schematic structural diagram of a head-mounted display device according to a fourth embodiment of the invention.

In the figure, 1, a main body frame; 2. an eyepiece; 5. a display screen; 6. a housing; 11. a guide shaft; 12. a second cover plate; 13. a third cover plate; 14. a sliding groove; 21. a movable frame; 22. a fixing hole; 23. a first guide block; 24. a second guide block; 25. a second axis of motion; 31. adjusting a knob; 32. mounting a bracket; 33. a drive cam; 34. a transmission slide block; 35. a dial scale; 41. a first rack; 42. dialing a key; 43. a first drive gear; 44. a second transmission gear; 45. a second rack; 46. a damping rubber ring; 131. a second guide groove; 211. a first axis of motion; 321. mounting grooves; 322. a spring; 323. steel balls; 324. a first cover plate; 331. a drive slot; 332. a card slot; 341. a drive handle; 342. connecting holes; 343. a drive shaft; 344. a first guide groove; 451. and (4) a boss.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.

As shown in fig. 1 to 10, an embodiment of the invention provides a head-mounted display device, which includes a main body frame 1, wherein two display screens 5 and two eyepieces 2 are arranged on the main body frame 1, and the two display screens and the two eyepieces are respectively arranged opposite to two eyes of a wearer; the eyepiece 2 is provided with a lens. The main body frame 1 is provided with a diopter and interpupillary distance adjusting mechanism for adjusting the distance between the display screen 5 and the ocular 2 on one side and for adjusting the left movement or the right movement of the ocular 2 on one side; diopter and interpupillary distance adjustment mechanism are including setting up the knob subassembly in main body frame 1 one side and setting up the subassembly of stirring in the adjacent one side with the knob subassembly, and diopter and interpupillary distance adjustment mechanism adopt the rotation of knob subassembly and stir the slip operation of subassembly and realize wearing display device's diopter and interpupillary distance's regulation respectively.

Diopter and interpupillary distance adjustment mechanism are arranged for the wearer both eyes, and diopter and interpupillary distance adjustment mechanism include two sets of knob subassemblies and two sets of subassemblies of stirring promptly, and wherein, two sets of knob subassemblies set up respectively in two opposite sides of main body frame 1, and two sets of subassemblies of stirring set up jointly and two sides between the opposite side, and the knob subassembly of unilateral is located one side of main body frame 1 promptly, and the subassembly of stirring of unilateral is located knob subassembly adjacent side. The knob assembly adopts the rotating operation to adjust the distance between the display screen 5 and the ocular 2 on one side, so as to realize the adjustment of the diopter on one side. The poking component controls the ocular 2 on one side to move left or right by sliding operation, so that the distance between the two ocular 2 is adjusted to realize the adjustment of the interpupillary distance.

This scheme of adoption, the different positions that rotating assembly and stir the subassembly and distribute respectively on head-mounted display device can carry out the independent regulation of diopter and interpupillary distance more conveniently, and can be respectively to left eye, the independent correction of right eye difference, and the drive regulation precision is higher, has improved the use experience of intelligent glasses greatly.

In a further embodiment, the toggle assembly comprises: a first rack 41, a toggle key 42 arranged on the first rack 41, a first transmission gear 43 meshed with the first rack 41, a second transmission gear 44 meshed with the first transmission gear 43, and a second rack 45 meshed with the second transmission gear 44; the first rack 41, the first transmission gear 43 and the second transmission gear 44 are all arranged on the side wall of the main body frame 1, and the damping rubber ring 46 is arranged on the inner side of the first transmission gear 43, so that the hand feeling is better when the interpupillary distance is adjusted; the second rack 45 is provided on the surface of the eyepiece 2.

The toggle key 42 is toggled leftwards or rightwards, the toggle key 42 drives the first rack 41 to move, the first transmission gear 43 is driven by the first rack 41 to rotate, so that the second transmission gear 44 rotates along with the first transmission gear 43, the second rack 45 is driven by the second transmission gear 44 to move leftwards or rightwards, the eyepiece 2 on one side is driven to move leftwards or rightwards, and the pupil distance is adjusted. The first transmission gear 43 is a large gear, and the second transmission gear 44 is a small gear. The gear wheel drives the pinion, according to lever principle, the slip strength of second rack 45 is 3 times of the slip strength of first rack 41, when stirring strength when interpupillary distance adjustment sets for rationally, the auto-lock can be realized to the in-process about eyepiece 2 removes, prevents eyepiece 2 horizontal slip. And the first rack 41 and the second rack 45 move synchronously and have the same total stroke, so that the adjustment is convenient.

In a further embodiment, the main body frame 1 is provided with a sliding slot 14; the first rack 41 is disposed in the slide groove 14.

The width of the sliding slot 14 is larger than that of the first rack 41, so that the first rack 41 can move left or right along the sliding slot 14 when being driven by the toggle key 42.

In a further embodiment, a second cover plate 12 is arranged on the side wall of the main body frame 1 at the head end of the first rack 41, and a third cover plate 13 is arranged at the tail end of the first rack 41; the second cover plate 12 and the third cover plate 13 are both connected to the main body frame 1 through screws; the first transmission gear 43 and the second transmission gear 44 are both located between the third cover plate 13 and the main body frame 1.

The first rack 41 protrudes from the middle, so that the second cover plate 12 covers a part of the non-protruding area on the first rack 41, and the third cover plate 13 covers another part of the non-protruding area on the second rack 45, so that the first rack 41 is limited in the sliding slot 14 and cannot be separated from the sliding slot 14 during the movement. The third cover plate 13 limits the first transmission gear 43 and the second transmission gear 44, so that the first transmission gear 43 and the second transmission gear 44 cannot be separated from the main body frame 1 in the rotating process. The main body frame 1 is provided with an installation position for installing the second cover plate 12 and the third cover plate 13, and the second cover plate 12 and the third cover plate 13 are locked and fixed on the installation position through screws.

In a further embodiment, the third cover plate 13 is provided with a second guide groove 131; the second rack 45 is provided with a boss 451 passing through the second guide groove 131.

The boss 451 is disposed in the second guide groove 131, and when the second rack 45 is driven to move left or right, the eyepiece 2 can be ensured to move linearly without deviation by the action of the boss 451 and the second guide groove 131, and a guide function is provided for the movement of the eyepiece 2.

In a further embodiment, the knob assembly comprises: an adjusting knob 31, a mounting bracket 32, a driving cam 33 and a transmission slide block 34; one end of the driving cam 33 penetrates into the mounting bracket 32, and the other end is in driving connection with the transmission slide block 34; the adjusting knob 31 is connected with the driving cam 33 through a screw; the mounting bracket 32 is attached to a side wall of the main body frame 1 adjacent to the first rack 41 by screws.

In a further embodiment, a drive groove 331 is provided in the drive cam 33; the transmission slide block 34 is provided with a driving handle 341 penetrating into the driving groove 331; the driving groove 331 extends spirally from the inside to the outside.

The side wall of the main body frame 1 adjacent to the first rack 41 is provided with a mounting position for fixing the mounting bracket 32, and the mounting bracket 32 is fixed on the mounting position by screws. The driving groove 331 extends spirally from inside to outside, and when the driving handle 341 is located at any position in the driving groove 331, the distance between the display screen 5 and the eyepiece 2 is different. The adjusting knob 31 is rotated, the adjusting knob 31 drives the driving cam 33 to rotate together, so that the driving handle 341 moves from the outer end part to the inner end part of the driving groove 331, or the driving handle 341 moves from the inner end part to the outer end part of the driving groove 331, so that the transmission slide block 34 moves forwards or backwards, the distance between the display screen 5 on one side and the eyepiece 2 is adjusted, and diopter adjustment on one side is realized.

In a further embodiment, mounting bracket 32 has mounting slots 321 therein; a spring 322 and a steel ball 323 are arranged in the mounting groove 321; the surface of the driving cam 33 is provided with a plurality of clamping grooves 332 for accommodating the steel balls 323.

The surface of the driving cam 33 is provided with a plurality of teeth, and the space between the teeth forms the above-mentioned catching groove 332. During the rotation of the driving cam 33, the steel ball 323 is pressed by the gear teeth to move into the mounting groove 321, and after the gear teeth rotate, the steel ball 323 enters the clamping groove 332 under the action of the spring 322. Each clamping groove 332 represents one-stage adjustment, and the plurality of clamping grooves 332 realize multi-stage adjustment, so that the diopter adjustment precision is higher.

In a further embodiment, a first cover plate 324 is disposed outside the mounting groove 321. The first cover plate 324 is used for sealing the notch on the side of the mounting groove 321 and preventing the spring 322 and the steel ball 323 from falling off from the mounting groove 321.

In a further embodiment, the transmission slider 34 is provided with a connection hole 342; the connecting hole 342 is provided therein with a transmission shaft 343.

In a further embodiment, the eyepiece 2 is provided with a moving frame 21 that can reciprocate relative to the eyepiece 2; the display screen 5 is arranged in the movable frame 21; the movable frame 21 is provided with a fixed hole 22; one end of the transmission shaft 343 is inserted into the fixing hole 22.

One end of the transmission shaft 343 penetrates the main body frame 1 and is pressed into the fixing hole 22. The other end of the transmission shaft 343 is in clearance fit with the connection hole 342 and can reciprocate relative to the connection hole 342. In the pupil distance adjusting process, the two eyepieces 2 move left or right, the transmission shaft 343 is driven to reciprocate relative to the connecting hole 342, but the transmission shaft 343 cannot be separated from the connecting hole 342 in the whole process. When the transmission slider 34 is driven by the driving cam 33 to move forward or backward, the transmission shaft 343 in the connection hole 342 is driven by the transmission slider 34 to move together, and the fixing hole 22 is matched with the transmission shaft 343, so that the movable frame 21 is driven by the transmission shaft 343 to move together, the distance between the display screen 5 and the eyepiece 2 is adjusted, and the diopter adjustment on one side is realized.

In a further embodiment, the moving frame 21 is provided with a first moving axis 211; a first guide block 23 is arranged on the ocular 2; the first moving shaft 211 is provided in the first guide block 23. The first moving shaft 211 is movably arranged in the first guide block 23, so that the moving frame 21 can reciprocate relative to the ocular lens 2, meanwhile, the number of the first guide blocks 23 and the number of the first moving shaft 211 are four, the positions correspond to one another, and the moving frame 21 can be guaranteed to keep linear motion.

In a further embodiment, the drive slider 34 is provided with a first guide groove 344; the side wall of the main body frame 1 is provided with a guide shaft 11 passing through the first guide groove 344.

The guide shaft 11 is disposed in the first guide groove 344 and reciprocates along the first guide groove 344, so that the driving slider 34 can keep moving linearly when being moved forward or backward, and the display screen 5 is prevented from being tilted during the movement.

In a further embodiment, the end of the adjustment knob 31 is provided with a dial 35. Be equipped with the scale on the calibrated scale 35, the user when carrying out diopter adjustment, every carry out the one-level and adjust, calibrated scale 35 rotates the angle that corresponds, and the scale on the calibrated scale 35 is looked over to the accessible, learns the position of current diopter, and when using next time, can directly rotate and predetermine the regulation that the scale can accomplish diopter, can the accurate default of adjusting. The operation is convenient, and the diopter can be quickly adjusted to the proper diopter in each use.

In a further embodiment, the outer side of the main body frame 1 is provided with a shell 6; the toggle key 42 penetrates through the shell 6 and is connected with the first rack 41; the knob is connected to the drive cam 33 through the housing 6.

The main body frame 1, the two eyepieces 2 and the display screen 5, and other components of the diopter and interpupillary distance adjusting mechanism except the toggle key 42 and the knob are provided in the housing 6. Wherein, the knobs are positioned at the left and right sides of the shell 6, and the toggle keys 42 are positioned at the bottom of the shell 6 and are arranged at the left and right sides. When the user wears the pupil corrector, diopter and pupil distance can be adjusted by rotating the knob and sliding the toggle key 42.

In a further embodiment, a second guide block 24 and a second motion shaft 25 are arranged on the ocular 2; the second moving shaft 25 passes through the second guide block 24, and both ends of the second moving shaft 25 are connected with the main body frame 1. By the engagement of the second moving axis 25 and the second guide block 24, the eyepiece 2 can be kept in linear reciprocating motion during interpupillary distance adjustment.

Foretell display device wears, the interpupillary distance of eye about can independent accurate control through the cooperation of gear and rack, the diopter of eye about can independent accurate control through the cooperation of knob and cam drive mechanism, the knob is located display device wears's the left and right sides, stirs key 42 and is located about the display device bottom wears, and the operation is convenient, and rationally distributed controls the eye and can independently adjust and correct to optimum.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims

1. A head-mounted display device comprises a main body frame, wherein two display screens and two eyepieces are arranged on the main body frame and are respectively arranged relative to two eyes of a wearer; the method is characterized in that: the main body frame is provided with a diopter and interpupillary distance adjusting mechanism for adjusting the distance between the display screen and the ocular lens on one side and for adjusting the ocular lens on one side to move left or right; diopter and interpupillary distance adjustment mechanism including set up the knob subassembly of main part frame one side and set up with the subassembly of stirring of the adjacent one side of knob subassembly, diopter and interpupillary distance adjustment mechanism adopt knob subassembly rotate with the slip operation of stirring the subassembly realizes wearing display device's diopter and interpupillary distance's regulation respectively.

2. The head-mounted display device of claim 1, wherein the toggle assembly comprises: the gear rack comprises a first rack, a toggle key arranged on the first rack, a first transmission gear meshed and connected with the first rack, a second transmission gear meshed and connected with the first transmission gear, and a second rack meshed and connected with the second transmission gear; the first rack, the first transmission gear and the second transmission gear are all arranged on the side wall of the main body frame; the second rack is disposed on the eyepiece surface.

3. The head-mounted display device of claim 2, wherein the knob assembly comprises: the adjusting knob, the mounting bracket, the driving cam and the transmission slide block are arranged on the mounting bracket; one end of the driving cam penetrates into the mounting bracket, and the other end of the driving cam is in driving connection with the transmission slide block; the adjusting knob is connected with the driving cam through a screw; the mounting bracket is connected to the side wall of the main body frame adjacent to the first rack through a screw.

4. The head-mounted display device according to claim 3, wherein the driving cam has a driving groove therein; the transmission slide block is provided with a driving handle penetrating into the driving groove; the driving groove extends spirally from inside to outside.

5. The head-mounted display device of claim 3, wherein the mounting bracket has a mounting slot therein; a spring and a steel ball are arranged in the mounting groove; the surface of the driving cam is provided with a plurality of clamping grooves for containing the steel balls.

6. The head-mounted display device of claim 5, wherein a first cover plate is disposed outside the mounting groove.

7. The head-mounted display device according to any one of claims 3 to 4, wherein the transmission slider is provided with a connecting hole; and a transmission shaft is arranged in the connecting hole.

8. The head-mounted display device according to claim 7, wherein the eyepiece is provided with a movable frame that can reciprocate relative to the eyepiece; the display screen is arranged in the movable frame; the movable frame is provided with a fixed hole; one end of the transmission shaft penetrates into the fixing hole.

9. The head-mounted display device according to claim 8, wherein the movable frame is provided with a first motion axis; a first guide block is arranged on the ocular; the first moving shaft is provided in the first guide block.

10. The head-mounted display device according to any one of claims 3 to 4, wherein the transmission slider is provided with a first guide groove; and a guide shaft penetrating through the first guide groove is arranged on the side wall of the main body frame.

11. The head mounted display device of claim 3, wherein the end of the adjustment knob is provided with a dial.

12. The head-mounted display device according to claim 2, wherein a second cover plate is disposed on the sidewall of the main body frame at a head end of the first rack, and a third cover plate is disposed at a tail end of the first rack; the second cover plate and the third cover plate are both connected to the main body frame through screws; the first transmission gear and the second transmission gear are both positioned between the third cover plate and the main body frame.

13. The head-mounted display device according to claim 12, wherein the third cover plate is provided with a second guide groove; and a boss penetrating through the second guide groove is arranged on the second rack.

14. The head-mounted display device according to claim 2, wherein a sliding groove is provided on the main body frame; the first rack is disposed in the sliding slot.

15. The head-mounted display device according to claim 3, wherein a housing is provided outside the main body frame; the toggle key penetrates through the shell and is connected with the first rack; the knob penetrates through the shell and is connected with the driving cam.

16. The head-mounted display device according to claim 1, wherein a second guide block and a second motion axis are provided on the eyepiece; the second motion shaft penetrates through the second guide block, and two ends of the second motion shaft are connected with the main body frame.