Lens structure and virtual reality display device
Through the lens structure of sliding module and positioning slide column, the assembly process of VR display device is simplified, the optical path offset and assembly difficulty caused by threaded connection are solved, the precise adjustment of imaging position is achieved, and the production efficiency is improved. Imaging effect.
Patent Information
- Application Number
- CN202411452179.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-01-10
AI Technical Summary
The lens structure of the existing VR display device is assembled through threaded connections, resulting in increased optical path deviation and assembly difficulty, reducing production efficiency.
The sliding module and the positioning slide column are used to cooperate with the limiting groove of the fixed lens barrel, and combined with the spiral groove of the adjustment sleeve and the positioning convex portion, the relative movement between the lenses is achieved, simplifying the assembly process and improving production efficiency.
By simplifying the assembly process, the difficulty of assembling the lens structure is reduced, the production efficiency is improved, and the precise adjustment of the imaging position of myopia or hyperopia users is achieved to meet the needs of clear imaging.
Smart Images
Figure CN119291881A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of virtual reality technology, and in particular to a lens structure and a virtual reality display device. Background Art
[0002] With the development of science and technology, virtual reality (VR) technology is applied to various fields, such as games, education, medical treatment, retail, etc. However, with the increasing number of users with myopia or hyperopia, it is necessary to adjust the relative position of the lens and the display module in the optical system of the VR display device according to the degree of myopia or hyperopia of the user, so as to adjust the imaging position of the optical system, thereby meeting the viewing needs of the users with myopia or hyperopia and achieving a clear imaging effect.
[0003] However, the lens structure of the VR display devices currently commonly available in the market mainly uses a threaded connection between an outer sleeve and an inner sleeve, and the outer sleeve and the inner sleeve are relatively moved by rotating around the optical axis, thereby adjusting the distance between a first lens fixed on the inner sleeve and a second lens fixed on the outer sleeve, and further adjusting the imaging position of the optical system; when the outer sleeve and the inner sleeve are connected by threads, a slight alignment offset between the inner and outer threads will cause an offset in the optical path in the optical system, so the inner and outer threads need to be precisely aligned when assembling the inner sleeve and the outer sleeve, which greatly increases the difficulty of assembly and reduces the production efficiency of the VR display device. Summary of the invention
[0004] A first aspect of the present application provides a lens structure, including: The fixed lens barrel comprises a first barrel, a first accommodating cavity formed around the first barrel, and at least one first limiting groove opened on the first barrel; A sliding module, comprising a first sleeve ring and at least one positioning slide post arranged on the outer surface of the first sleeve ring, wherein the first sleeve ring is accommodated in the first accommodation cavity and is used to fix the first lens, and the at least one positioning slide post is limitedly matched with the first limiting groove; and an adjusting sleeve rotatably connected to the outer surface of the fixed lens barrel in the radial direction of the optical axis direction; the adjusting sleeve comprises a second barrel and at least one first spiral groove provided on the inner surface of the second barrel, wherein the at least one first spiral groove is inclined relative to the circumference of the second barrel; Wherein, the at least one first positioning slide column passes through the first limiting groove and is embedded in the first spiral groove; when the adjusting sleeve rotates around the optical axis, it drives the sliding module to move relative to the fixed lens barrel in the direction of the optical axis.
[0005] The lens structure provided in the embodiment of the present application can relatively simply assemble the sliding module and the fixed lens barrel by setting at least one positioning slide post of the sliding module to cooperate with the first limiting groove of the fixed lens barrel. At least one first spiral groove is provided on the adjusting collar, and the at least one first spiral groove is inclined relative to the circumference of the second barrel. The at least one first positioning slide post passes through the first limiting groove and is embedded in the first spiral groove. When the adjusting collar rotates around the optical axis, it drives the sliding module to move relative to the fixed lens barrel in the direction of the optical axis, which is beneficial to reducing the difficulty of assembling the sliding module, the adjusting collar and the fixed lens barrel, and is beneficial to improving the production efficiency of the lens structure. When the sliding module is fixed with the first lens and the fixed lens barrel is fixed with the second lens, the first lens and the second lens can be driven to move relative to each other by rotating the adjusting collar, thereby adjusting the imaging position, thereby meeting the viewing needs of users with myopia or hyperopia and achieving a clear imaging effect.
[0006] In one embodiment, the lens structure further includes a graduated ring, which is fixed to an end of the first barrel away from the first ring, and the graduated ring is used to fix the second lens and is partially accommodated in the first accommodating cavity.
[0007] In one embodiment, the scale ring includes a second ring and at least one positioning protrusion protruding from the second ring toward the direction close to the fixed lens barrel, the at least one positioning protrusion is engaged in the first limiting groove, and the at least one positioning slide is limitedly cooperated with the first limiting groove and the positioning protrusion.
[0008] In one embodiment, the scale ring includes three positioning protrusions, and the three positioning protrusions are arranged at equal intervals.
[0009] In one embodiment, the fixed lens barrel also includes a mounting plate; the mounting plate is connected to the first barrel and is arranged at one end of the first barrel away from the scale ring, and the side of the mounting plate away from the scale ring is used to fix a display module, and the display module is used to emit image light.
[0010] In one embodiment, at least one mounting hole is formed on the mounting plate, and the lens structure is screwed to the optical machine housing through the mounting hole.
[0011] In one embodiment, a first lens is fixed to the first ring, and a second lens is fixed to the scale ring. The first lens is used to receive the image light emitted from the display module, and the second lens is used to receive the image light emitted from the first lens.
[0012] In one embodiment, three positioning slide posts are disposed on the outer surface of the first collar, the three positioning slide posts are arranged at equal intervals, and each positioning slide post is limitedly matched with each first limiting groove.
[0013] A second aspect of the present application provides a virtual reality display device, comprising: display module; and As in the lens structure described in any of the above embodiments, the display module is fixed to a side of the fixed lens barrel away from the adjustment sleeve and is used to emit image light; the lens structure is used to receive the image light and project the image light to the human eye.
[0014] The virtual reality display device provided by the embodiment of the present application is provided with the lens structure described in any of the above embodiments, and at least one positioning slide post of the sliding module is limitedly matched with the first limiting groove of the fixed lens barrel, so that the sliding module and the fixed lens barrel can be assembled relatively simply, and at least one first spiral groove is provided on the adjusting sleeve, and the at least one first spiral groove is inclined relative to the circumference of the second barrel, and the at least one first positioning slide post passes through the first limiting groove and is embedded in the first spiral groove. When the adjusting sleeve rotates around the optical axis direction, the sliding module is driven to move relative to the fixed lens barrel in the optical axis direction, which is conducive to reducing the difficulty of assembling the sliding module, the adjusting sleeve and the fixed lens barrel, and is conducive to improving the production efficiency of the virtual reality display device; and when the sliding module is fixed with the first lens and the fixed lens barrel is fixed with the second lens, the first lens and the second lens can be driven to move relative to each other by rotating the adjusting sleeve, so as to adjust the imaging position of the virtual reality display device, thereby meeting the viewing needs of users with myopia or hyperopia and achieving a clear imaging effect.
[0015] In one embodiment, the virtual reality display device further includes an optical machine housing, and the lens structure is disposed on the optical machine housing. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 Schematic diagram of the lens structure of an embodiment of the present application.
[0017] Figure 2 An exploded view of a lens structure according to an embodiment of the present application.
[0018] Figure 3 For Figure 1 Schematic cross-sectional view along line III-III.
[0019] Figure 4 It is a structural schematic diagram of an adjustment sleeve and a fixed lens barrel of a lens structure in one embodiment of the present application.
[0020] Figure 5is a schematic diagram of a virtual reality display device in one embodiment of the present application.
[0021] Description of main component symbols: Lens structure 100 Fixed tube 1 The first cylinder 11 The first limiting groove 13 First accommodating chamber 15 Mounting plate 17 Mounting hole 171 Sliding module 3 First set of rings 31 First lens 311 Positioning slide 33 Scale ring 5 Second set of rings 51 Second lens 511 Positioning protrusion 53 Adjustment sleeve 7 Second cylinder 71 Anti-slip pattern 711 First spiral groove 73 Notch 731 Median 733 Distance H1, H2, H3 Optical axis direction X Virtual reality display device 900 Optical machine housing 91 Display module 93 Image light L1 Human Eye The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.
[0023] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0024] In order to further explain the technical means and effects adopted by the present application to achieve the intended purpose, the present application is described in detail below in conjunction with the accompanying drawings and preferred implementation methods.
[0025] Please also read Figure 1 and Figure 2 The lens structure 100 of the embodiment of the present application includes a fixed lens barrel 1, a sliding module 3, a scale ring 5 and an adjusting sleeve 7.
[0026] The fixed lens barrel 1 includes a first barrel 11, a first limiting groove 13, a first accommodating cavity 15 and a mounting plate 17. The first barrel 11 is roughly sleeve-shaped, and the material of the first barrel 11 can be any one of plastic, metal and glass. For example, the material of the first barrel 11 can be polymethyl methacrylate (PMMA). At least one first limiting groove 13 is provided on the first barrel 11, and the first limiting groove 13 is used to cooperate with the sliding module 3 in limiting position. In this embodiment, three first limiting grooves 13 are provided on the first barrel 11, and the three first limiting grooves 13 are arranged at equal intervals; in other embodiments, one or more first limiting grooves 13 can also be provided on the first barrel 11; when the first barrel 11 is provided with multiple first limiting grooves 13, the multiple first limiting grooves 13 are arranged at equal intervals or at unequal intervals, and this application does not make any limitation.
[0027] The first accommodating chamber 15 is formed by surrounding the first cylinder 11, and the sliding module 3 and the scale ring 5 are partially accommodated in the first accommodating chamber 15. In some embodiments, the first accommodating chamber 15 may also be provided with a spacer, a locking ring, a sealing ring and other components, so that the lens (not shown) can be installed in the first accommodating chamber 15 through the above components.
[0028] The mounting plate 17 is connected to the first cylinder 11 and is disposed at an end of the first cylinder 11 away from the scale ring 5. Specifically, the mounting plate 17 is fixed in the radial direction of the first cylinder 11. Figure 1 and Figure 5 When the lens structure 100 is applied to a display device, the side of the mounting plate 17 away from the scale ring 5 is used to fix a display module 93, and the display module 93 is used to emit image light L1. At least one mounting hole 171 is provided on the mounting plate 17. When the lens structure 100 is applied to a display device, the lens structure 100 is screwed to the optical machine housing 91 of the display device through the mounting hole 171. In this embodiment, four mounting holes 171 are provided on the mounting plate 17 to further enhance the stability after installation; in other embodiments, one or more mounting holes 171 may be provided on the mounting plate 17, and this application does not limit this. The fixed lens barrel 1 is mounted on the optical machine housing 91 through the mounting plate 17, so as to facilitate disassembly and assembly.
[0029] Please also read Figure 2 and Figure 3The sliding module 3 includes a first ring 31 and at least one positioning slide 33. The first ring 31 is generally annular, and the material of the first ring 31 can be any one of plastic, metal and glass. The first ring 31 is accommodated in the first accommodation cavity 15 and is used to fix the first lens 311. Specifically, when the first ring 31 is used to fix the first lens 311, the first lens 311 can be engaged with the inner surface of the first ring 31.
[0030] The positioning slide 33 is disposed on the outer surface of the first sleeve ring 31. In this embodiment, the first sleeve ring 31 and the positioning slide 33 are integrally formed, for example, they can be integrally formed by an injection molding machine or integrally formed by 3D printing; in other embodiments, the first sleeve ring 31 and the positioning slide 33 can also be formed separately and then fixed by bonding, which is not limited in this application.
[0031] The positioning slide 33 is limitedly matched with the first limiting groove 13. Specifically, when the sliding module 3 is placed in the fixed lens barrel 1, the first sleeve 31 is accommodated in the first accommodating cavity 15, and the positioning slide 33 abuts against the first limiting groove 13, and protrudes from the outer surface of the first sleeve 31 in a direction away from the first sleeve 31. When the positioning slide 33 moves along the optical axis direction X in the first limiting groove 13, the positioning slide 33 drives the first sleeve 31 to move relative to the fixed sleeve along the optical axis direction X, thereby causing the first lens 311 to move relative to the fixed sleeve. In this embodiment, three positioning slides 33 are provided on the outer surface of the first ring 31, and the three positioning slides 33 are arranged at equal intervals, and each positioning slide 33 is limitedly cooperated with each first limiting groove 13; in other embodiments, one or more positioning slides 33 can also be provided on the outer surface of the first ring 31; when the outer surface of the first ring 31 is provided with multiple positioning slides 33, the multiple positioning slides 33 can be arranged at equal intervals or unequal intervals, and this application does not impose any restrictions.
[0032] The scale ring 5 is fixed to one end of the first cylinder 11 away from the first ring 31. The scale ring 5 is used to fix the second lens 511 and is partially accommodated in the first accommodating cavity 15. The scale ring 5 includes a second ring 51 and at least one positioning protrusion 53. The second ring 51 is roughly annular, and the material of the second ring 51 can be any one of plastic, metal and glass. One end of the second ring 51 close to the sliding module 3 is accommodated in the first accommodating cavity 15. The second ring 51 is used to fix the second lens 511. Specifically, when the second ring 51 is used to fix the second lens 511, the second lens 511 can be engaged with the inner surface of the second ring 51.
[0033] The positioning protrusion 53 protrudes from the second sleeve ring 51 toward the direction close to the first barrel 11. Specifically, the positioning protrusion 53 is engaged in the first limiting groove 13. By engaging the positioning protrusion 53 in the first limiting groove 13, the second sleeve ring 51 contacts the first barrel 11, which is conducive to further strengthening the rigidity of the scale sleeve ring 5 and the fixed lens barrel 1 after assembly, and is conducive to further improving the stability of the lens structure 100 when in use. When the sliding module 3 is placed in the fixed lens barrel 1, the scale sleeve ring 5 is fixed to the end of the first barrel 11 away from the first sleeve ring 31, and the positioning slide column 33 is limited and matched with the first limiting groove 13 and the positioning protrusion 53.
[0034] In this embodiment, the positioning protrusion 53 and the second collar 51 are integrally formed, for example, they can be integrally formed by an injection molding machine or integrally formed by 3D printing; in other embodiments, the second collar 51 and the positioning protrusion 53 can also be formed separately and then fixed by bonding, which is not limited in this application. In this embodiment, the scale collar 5 includes three positioning protrusions 53, and the three positioning protrusions 53 are arranged at equal intervals. In other embodiments, the scale collar 5 can also include one or more positioning protrusions 53, which is not limited in this application.
[0035] Please also read Figure 2 and Figure 4 The adjusting sleeve 7 is rotatably connected to the outer surface of the fixed lens barrel 1 in the radial direction of the optical axis direction X. The adjusting sleeve 7 includes a second barrel 71 and at least one first spiral groove 73. The second barrel 71 is generally sleeve-shaped, and the material of the second barrel 71 can be any one of plastic, metal and glass. The outer surface of the second barrel 71 is provided with anti-slip grooves 711, and when the user rotates the second barrel 71 around the optical axis direction X, the anti-slip grooves 711 are conducive to increasing friction.
[0036] At least one first spiral groove 73 is formed on the inner surface of the second cylinder 71. In this embodiment, three first spiral grooves 73 are formed on the inner surface of the second cylinder 71, and the three first spiral grooves 73 are arranged at equal intervals; in other embodiments, one or more first spiral grooves 73 may be formed on the second cylinder 71; when the second cylinder 71 is formed with multiple first spiral grooves 73, the multiple first spiral grooves 73 may be arranged at equal intervals or at unequal intervals, which is not limited in this application.
[0037] Specifically, a notch 731 is provided at one end of the first spiral groove 73 close to the mounting plate 17, and the notch 731 is used for the first positioning slide post 33 to pass through and be embedded in the first spiral groove 73. By providing the notch 731, the first positioning slide post 33 and the adjustment sleeve 7 can be assembled relatively simply. The first spiral groove 73 is inclined relative to the circumference of the second cylinder 71, that is, the distance H between each point on the midline 733 in the long diameter direction of the first spiral groove 73 and the mounting plate 17 gradually decreases or increases from one end of the midline 733 to the other end, such as Figure 4 As shown in , H1>H2>H3. The first positioning slide 33 passes through the first limiting groove 13 and is embedded in the first spiral groove 73. When the adjusting sleeve 7 rotates around the optical axis direction X, the sliding module 3 is driven to move relative to the fixed lens barrel 1 in the optical axis direction X.
[0038] By setting the first spiral groove 73 to be inclined relative to the circumferential direction of the second barrel 71, the first positioning slide post 33 can be moved in the first spiral groove 73 while the adjusting sleeve 7 rotates around the optical axis direction X. Since the positioning slide post 33 is limitedly matched with the first limiting groove 13 and the positioning protrusion 53, the first positioning slide post 33 is limited in the first spiral groove 73, and the first spiral groove 73 drives the first positioning slide post 33 to move relative to the fixed lens barrel 1 in the optical axis direction X, that is, the adjusting sleeve 7 drives the sliding module 33 to rotate around the optical axis direction X. 3 moves relative to the fixed lens barrel 1 in the optical axis direction X, that is, the adjusting sleeve 7 drives the first lens 311 to move relative to the fixed lens barrel 1 in the optical axis direction X while rotating around the optical axis direction X, so that the first lens 311 and the second lens 511 move relative to each other, which can easily achieve the purpose of adjusting the imaging position, thereby meeting the viewing needs of users with myopia or hyperopia and achieving a clear imaging effect; and when the first lens 311 is a special-shaped lens, the sliding module 3 can also move relatively stably in the optical axis direction X relative to the fixed lens barrel 1.
[0039] In a proportional lens structure 100, an outer sleeve and an inner sleeve are connected by threads, and the outer sleeve and the inner sleeve are relatively moved by rotating around the optical axis, thereby adjusting the distance between the inner sleeve fixed with the first lens 311 and the fixed lens barrel 1 fixed with the second lens 511. The lens structure 100 of the embodiment of the present application passes through the first limiting groove 13 and is embedded in the first spiral groove 73 through the first positioning slide post 33. The sliding module 3 is driven to move relative to the fixed lens barrel 1 in the optical axis direction X while the adjusting sleeve 7 rotates around the optical axis direction X. Compared with the method of using threads, the lens structure 100 of the embodiment of the present application can realize nonlinear proportional movement between the first lens 311 and the second lens 511, that is, a small rotation can also adjust the distance between the first lens 311 and the second lens 511, which is conducive to more precise adjustment of the distance between the first lens 311 and the second lens 511; and compared with the method of using threads, the lens structure 100 of the embodiment of the present application, because the sliding module 3 is accommodated in the first accommodating chamber 15, the movable devices are all in a relatively closed accommodating chamber, which is conducive to reducing the risk of the first lens 311 being contaminated by the environment. The lens structure 100 of the embodiment of the present application has only two layers of sleeve structure (fixed lens barrel 1 and adjustment sleeve 7) in the radial direction of the optical axis direction X. Compared with other comparative examples that use three layers of sleeve structure in the radial direction of the optical axis direction X, the lens structure 100 of the embodiment of the present application can achieve a larger accommodating space while reducing the overall volume. The lens structure 100 of the embodiment of the present application has limiting mechanisms such as the first limiting groove 13, the positioning slide column 33, the first convex portion and the first spiral groove 73, which can relatively simply assemble the fixed lens barrel 1, the sliding module 3, the scale ring 5 and the adjustment sleeve 7, which is conducive to improving the accuracy after assembly.
[0040] The lens structure 100 provided in the embodiment of the present application can be assembled relatively simply by setting at least one positioning slide post 33 of the sliding module 3 to be limitedly matched with the first limiting groove 13 of the fixed lens barrel 1. At least one first spiral groove 73 is provided on the adjusting sleeve, and at least one first spiral groove 73 is inclined relative to the circumference of the second barrel 71. At least one first positioning slide post 33 passes through the first limiting groove 13 and is embedded in the first spiral groove 73. When the adjusting sleeve 7 rotates around the optical axis direction X, the sliding module 3 is driven to move relative to the fixed lens barrel 1 in the optical axis direction X, which is conducive to reducing the assembly difficulty of the sliding module 3, the adjusting sleeve and the fixed lens barrel 1, and is conducive to improving the production efficiency of the lens structure 100; and when the sliding module 3 is fixed with the first lens 311 and the fixed lens barrel 1 is fixed with the second lens 511, the first lens 311 and the second lens 511 can be driven to move relative to each other by rotating the adjusting sleeve 7, so as to adjust the imaging position, thereby meeting the viewing needs of users with myopia or hyperopia and achieving a clear imaging effect.
[0041] Please also read Figure 2 and Figure 5 The virtual reality display device 900 of the embodiment of the present application includes an optical machine housing 91, two lens structures 100 and a display module 93. The display module 93 is fixed to the side of the fixed lens barrel 1 away from the adjustment sleeve 7 and is used to emit the image light L1. The two lens structures 100 are arranged on the optical machine housing 91, and the two lens structures 100 are used to respectively receive the image light L1 and independently project the image light L1 to one of the human eyes E. The first lens 311 in the first ring 31 is used to receive the image light L1 emitted from the display module 93, and the second lens 511 in the scale ring 5 is used to receive the image light L1 emitted from the first lens 311 and project the image light L1 to the human eye E. The display module 93 includes a display (not shown) and a control circuit board (not shown), and the display can be any one of a liquid crystal display, a light emitting diode display, a micro light emitting diode display, an organic electric laser display and an organic light emitting semiconductor display.
[0042] The virtual reality display device 900 provided in the embodiment of the present application, by setting the lens structure 100, at least one positioning slide post 33 of the sliding module 3 is limitedly matched with the first limiting groove 13 of the fixed lens barrel 1, the sliding module 3 and the fixed lens barrel 1 can be assembled relatively simply, at least one first spiral groove 73 is opened on the adjusting sleeve, and at least one first spiral groove 73 is inclined relative to the circumference of the second barrel 71, at least one first positioning slide post 33 passes through the first limiting groove 13 and is embedded in the first spiral groove 73, when the adjusting sleeve 7 rotates around the optical axis direction X, it drives the sliding module 3 and the fixed lens barrel 1 to rotate. The movable module 3 moves relative to the fixed lens barrel 1 in the optical axis direction X, which is beneficial to reducing the difficulty of assembling the sliding module 3, the adjusting ring and the fixed lens barrel 1, and is beneficial to improving the production efficiency of the virtual reality display device 900; and when the sliding module 3 is fixed with the first lens 311 and the fixed lens barrel 1 is fixed with the second lens 511, the first lens 311 and the second lens 511 can be driven to move relative to each other by rotating the adjusting sleeve 7, so as to adjust the imaging position of the virtual reality display device 900, thereby meeting the viewing needs of users with myopia or hyperopia and achieving a clear imaging effect.
[0043] The above implementation modes are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above preferred implementation modes, a person skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.
Claims
1. A lens structure, characterized in that: include: The fixed lens barrel comprises a first barrel, a first accommodating cavity formed around the first barrel, and at least one first limiting groove opened on the first barrel; A sliding module, comprising a first sleeve ring and at least one positioning slide post arranged on the outer surface of the first sleeve ring, wherein the first sleeve ring is accommodated in the first accommodation cavity and is used to fix the first lens, and the at least one positioning slide post is limitedly matched with the first limiting groove; and an adjusting sleeve rotatably connected to the outer surface of the fixed lens barrel in the radial direction of the optical axis; the adjusting sleeve comprises a second barrel and at least one first spiral groove provided on the inner surface of the second barrel, wherein the at least one first spiral groove is inclined relative to the circumference of the second barrel; Wherein, the at least one first positioning slide column passes through the first limiting groove and is embedded in the first spiral groove; when the adjusting sleeve rotates around the optical axis, it drives the sliding module to move relative to the fixed lens barrel in the direction of the optical axis.
2. The lens structure according to claim 1, characterized in that: The lens structure further comprises a graduated ring, which is fixed to an end of the first barrel away from the first ring. The graduated ring is used to fix the second lens and is partially accommodated in the first accommodating cavity.
3. The lens structure according to claim 2, characterized in that: The scale ring includes a second ring and at least one positioning protrusion protruding from the second ring toward the direction close to the fixed lens barrel, the at least one positioning protrusion is engaged in the first limiting groove, and the at least one positioning slide is limitedly cooperated with the first limiting groove and the positioning protrusion.
4. The lens structure according to claim 3, characterized in that: The scale ring includes three positioning protrusions, and the three positioning protrusions are arranged at equal intervals.
5. The lens structure according to claim 2, characterized in that: The fixed lens barrel also includes a mounting plate; the mounting plate is connected to the first barrel and is arranged at one end of the first barrel away from the scale ring, and the side of the mounting plate away from the scale ring is used to fix a display module, and the display module is used to emit image light.
6. The lens structure according to claim 5, characterized in that: The mounting plate is provided with at least one mounting hole, and the lens structure is screwed to the optical machine housing through the mounting hole.
7. The lens structure according to claim 5, characterized in that: A first lens is fixed to the first ring, and a second lens is fixed to the scale ring. The first lens is used to receive the image light emitted from the display module, and the second lens is used to receive the image light emitted from the first lens.
8. The lens structure according to claim 1, characterized in that: The outer surface of the first sleeve ring is provided with three positioning slide posts, the three positioning slide posts are arranged at equal intervals, and each positioning slide post is limitedly matched with each first limiting groove.
9. A virtual reality display device, characterized in that: include: Display module; as well as According to the lens structure as described in any one of claims 1 to 8, the display module is fixed to a side of the fixed lens barrel away from the adjustment sleeve and is used to emit image light; the lens structure is used to receive the image light and project the image light to the human eye.
10. The virtual reality display device according to claim 9, characterized in that: The virtual reality display device also includes an optical machine housing, and the lens structure is arranged on the optical machine housing.