Eyepiece structure of industrial intelligent AR glasses

Abstract

The utility model relates to an eyepiece structure of industrial intelligent AR (Augmented Reality) glasses, which is arranged at the bottom of a device host of the AR glasses and comprises a double-diffraction optical machine assembly and protective glasses, the double-diffraction optical machine assembly comprises an image output optical machine and waveguide diffraction lenses, and the protective glasses are positioned on the front side of the double-diffraction optical machine assembly to form a protective structure; the waveguide diffraction lens is obliquely arranged, the top end is close to the image output light machine, and the bottom end is far away from the image output light machine. According to the utility model, the waveguide diffraction lens is arranged in an inclined manner, so that light rays of a lower environment are prevented from being reflected to eyes of a user through the inner side mirror surface, unnecessary glare phenomena can be reduced, and the visibility and definition of virtual contents are improved; the inclined waveguide diffraction lens enables the light emitted by the image output light machine to be efficiently coupled into the waveguide lens, thereby improving the quality and efficiency of image transmission. The protective glasses are additionally arranged on the front side of the double-diffraction optical machine assembly, so that the waveguide diffraction lenses are effectively prevented from being scratched, impacted and other external damage.

Description

Technical Field

[0001] The utility model relates to the technical field of AR glasses, and in particular to an eyepiece structure of industrial intelligent AR glasses. Background Art

[0002] Augmented Reality (AR) glasses are smart wearable devices that can overlay digital information and virtual images onto the user's real field of view, creating a mixed reality experience.

[0003] For example, Chinese Patent Publication No. CN219417882U discloses a coupled AR glasses structure, and Chinese Patent Publication No. CN211857057U discloses a near-eye display device. It can be seen that the waveguide lenses of existing AR glasses are arranged vertically, allowing ambient light to easily enter from below and reflect through the inner side of the mirror to the user's eyes, causing unnecessary glare or ghosting, reducing the visibility and clarity of virtual content. Secondly, the waveguide lenses are exposed on the outermost side and lack effective protection, making the waveguide diffraction lenses susceptible to damage such as scratches and impacts, affecting the long-term reliability of AR glasses and increasing maintenance costs.

[0004] The above problems are worth solving. Utility Model Content

[0005] In order to solve the problem that the waveguide lenses of existing AR glasses are easily affected by ambient light and the lens protection is insufficient, the utility model provides an eyepiece structure of industrial intelligent AR glasses.

[0006] The technical solution of this utility model is as follows:

[0007] An eyepiece structure for industrial intelligent AR glasses is provided at the bottom of the device host of the AR glasses, and includes a dual-diffraction optical machine assembly and a protective mirror. The dual-diffraction optical machine assembly includes an image output optical machine and a waveguide diffraction lens. The image output optical machine is used to output an image source to the waveguide diffraction lens for display. The protective mirror is located on the front side of the dual-diffraction optical machine assembly to form a protective structure; the waveguide diffraction lens is arranged at an angle, with its top end close to the image output optical machine and its bottom end away from the image output optical machine.

[0008] By adopting the above technical solution, the tilted waveguide diffraction lens can not only better couple the light from the image output optical machine into the waveguide diffraction lens, but also prevent the ambient light below the AR glasses from being reflected to the human eye through the inner mirror of the waveguide diffraction lens, affecting the viewing of the image on the waveguide diffraction lens, thereby ensuring the clarity of the virtual content of the AR glasses; the protective mirror forms a semi-enclosed protective structure on the front side of the dual diffraction optical machine assembly to prevent damage to the waveguide diffraction lens.

[0009] The utility model according to the above scheme is characterized in that the double-diffraction optical machine assembly also includes an optical machine main shell, a shell side cover, and a shell back plate. The optical machine main shell has a cavity for installing the image output optical machine. The shell side cover can be detachably installed at the lateral opening of the optical machine main shell. The protective shell assembled by the optical machine main shell and the shell side cover is provided with an installation groove, and the shell back plate is correspondingly provided with a limiting groove. The shell back plate can be installed and removed on the protective shell, and the waveguide diffraction lens is fixed by the limiting groove and the installation groove that are spliced ​​with each other.

[0010] Furthermore, a square heat dissipation hole is provided on one side of the main housing of the optical machine, and a circular light exit hole is provided on the other opposite side, and the square heat dissipation hole and the circular light exit hole are located on both sides of the lateral opening.

[0011] Furthermore, the size of the circular light-emitting hole is equal to the size of the light port of the image output optical machine.

[0012] The utility model according to the above solution is characterized in that the inclination angle of the waveguide diffraction lens ranges from 10° to 15°.

[0013] The utility model according to the above scheme is characterized in that the middle of the bottom of the shell of the device main body extends downward to form a accommodating cavity, and the accommodating cavity is connected to the inner cavity of the device main body; the double diffraction optical machine component is installed in the accommodating cavity.

[0014] Furthermore, the accommodating cavity is provided with a detachable cavity cover, two studs are provided inside the accommodating cavity, the cavity cover is provided with corresponding bolt holes, and the main optical machine housing of the double-diffraction optical machine assembly is provided with a connecting ear with a screw hole.

[0015] The utility model according to the above solution is characterized in that the protective mirror is arc-shaped, and the chord height of the protective mirror is not less than 2 cm, and the width of the protective mirror is greater than the width of the waveguide diffraction lens.

[0016] The utility model according to the above scheme is characterized in that an arc-shaped notch is provided on the lower side of the middle part of the waveguide diffraction lens, and a convex arc surface is provided on the shell back plate of the double diffraction optical machine component, and the convex arc surface is fitted with the lower surface of the arc-shaped notch.

[0017] The utility model according to the above solution is characterized in that a supporting groove is provided at the bottom of the protective mirror.

[0018] The utility model according to the above solution has the following beneficial effects:

[0019] By tilting the waveguide diffraction lens, the utility model can effectively prevent the ambient light below from directly entering and being reflected to the user's eyes through the inner mirror, which helps to reduce unnecessary glare or ghosting, thereby improving the visibility and clarity of virtual content; the tilted waveguide diffraction lens design enables the light emitted by the image output optical machine to be more efficiently coupled into the waveguide lens, improving the quality and efficiency of image transmission; a protective mirror is added to the front side of the dual diffraction optical machine assembly to form a semi-enclosed physical barrier, which effectively protects the waveguide diffraction lens from external damage such as scratches and impacts. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the utility model applied to AR glasses;

[0021] Figure 2 This is a schematic diagram of the structure of the present invention applied to AR glasses from another perspective;

[0022] Figure 3 This is a schematic diagram of the structure of the present invention and the host of the AR glasses device;

[0023] Figure 4 This is a schematic diagram of the installation of the double-diffraction optical machine assembly and the device host of the present invention;

[0024] Figure 5 Schematic diagram of the tilting arrangement of the waveguide diffraction mirror of the double diffraction optomechanical assembly;

[0025] Figure 6 This is an exploded diagram of the structure of the double-diffraction optical machine assembly;

[0026] Figure 7 This is a structural exploded diagram of the double-diffraction optical machine assembly from another perspective;

[0027] Figure 8 Schematic diagram of the structure of protective glasses.

[0028] In the figure,

[0029] 1. Headband wearing part; 2. Device main unit; 21. Accommodating chamber; 211. Chamber cover; 221. Axis pin; 22. Arc-shaped slot;

[0030] 3. Dual-diffraction optical engine assembly; 31. Image output optical engine; 32. Waveguide diffraction lens; 321. Arc-shaped notch; 33. Optical engine main housing; 331. Square heat dissipation holes; 332. Circular light exit hole; 333. Mounting slot; 34. Housing side cover; 35. Housing back plate; 351. Limiting slot; 352. Convex arc surface; 353. Positioning pin;

[0031] 4. Protective glasses; 41. Snap-in slot; 42. Support slot. DETAILED DESCRIPTION

[0032] To better understand the purpose, technical solutions, and technical effects of the present invention, the present invention is further explained below with reference to the accompanying drawings and embodiments. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. It should also be noted that the embodiments described below are intended only to illustrate the present invention and are not intended to limit the present invention.

[0033] It should be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element; when an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0034] The indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the application is typically placed when in use, or the orientation or position relationship commonly understood by those skilled in the art, or the orientation or position relationship commonly placed when the product of the application is in use. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0035] like Figures 1 to 3 As shown, an eyepiece structure of industrial intelligent AR glasses is arranged at the bottom of the device host of the AR glasses. The eyepiece structure includes a dual-diffraction optical machine component and a protective mirror. The dual-diffraction optical machine component 3 includes an image output optical machine 31 and a waveguide diffraction lens 32. The image output optical machine 31 is used to output the image source to the waveguide diffraction lens 32, and the waveguide diffraction lens 32 is used to image the image source into the left and right eye fields of the wearer, thereby achieving the effect of left and right dual-channel augmented reality.

[0036] In one application example, the mainboard of the device host 2 integrates at least a processing unit (MCU) and a storage unit. The processing unit can analyze the environment based on the real scene and spatial positioning data obtained by the camera and / or sensors of the AR glasses, and automatically calculate how to accurately place the virtual content in the corresponding position in the real world, retrieve the display content from the storage unit, and display it at the corresponding position. For example, if the position of the cabinet in front is analyzed and the distance from the user is 2 meters, the text message "2 meters" and the distance ruler icon will be correctly displayed on the cabinet.

[0037] like Figure 4 、 Figure 6As shown, the dual-diffraction optical engine assembly 3 includes not only the image output optical engine 31 and the waveguide diffraction lens 32, but also includes: an optical engine main housing 33, a housing side cover 34, and a housing back plate 35. The optical engine main housing 33 has a cavity for installing the image output optical engine 31, and the cavity has a lateral opening. The housing side cover 34 can be removably installed at the lateral opening of the optical engine main housing 33. The optical engine main housing 33 and the housing side cover 34 are assembled into a protective shell. A square heat dissipation hole 331 is provided on one side of the optical engine main housing 33, and a circular light exit hole 332 is provided on the other side of the opposite side. The square heat dissipation hole 331 and the circular light exit hole 332 are located on both sides of the lateral opening. The square heat dissipation hole 331 can provide a heat dissipation outlet for the image output optical engine 31 in the protective shell, which is beneficial for the discharge of heat generated by the image output optical engine 31 during operation. The size of the circular light outlet 332 is equal to the size of the light port of the image output optical machine 31, which can provide a larger light outlet for the image output optical machine 31 in the protective shell, and can meet the needs of the image output optical machine 31 to use a shorter focal length lens to achieve the same field of view, which is conducive to projecting the image onto the waveguide diffraction lens 32 at a close distance; not only that, the larger light outlet can pass more light, which helps to improve the overall brightness of the picture, thereby providing a clear virtual image.

[0038] The protective housing, formed by the main housing 33 of the optical engine and the housing side cover, has a mounting slot 333 for mounting the waveguide diffraction lens 32 on the side near the circular light exit 332. The housing back panel 35 has a corresponding retaining slot 351, which is adapted to the structure of the waveguide diffraction lens 32. The housing back panel 35 can be installed and removed from the protective housing, and the waveguide diffraction lens 32 is secured by the interlocking retaining slots 351 and mounting slots 333. Screw holes are provided at the upper and lower ends of the housing back panel 35. When maintaining or replacing the waveguide diffraction lens 32, the housing back panel 35 can be removed by screwing the screws, and then the waveguide diffraction lens 32 can be removed. When installing the waveguide diffraction lens 32, the combined structure of the retaining slots 351 and mounting slots 333 secures the waveguide diffraction lens 32, eliminating the need for complex lens adjustment and providing great convenience.

[0039] In a preferred embodiment, positioning pins 353 are provided on both sides of the upper and lower screw holes of the shell back plate 35, and corresponding pin holes are provided on the back of the optical machine main shell 33. When installing the shell back plate 35, the positioning pins 353 only need to be aligned and inserted into the pin holes to quickly complete the installation.

[0040] In a preferred embodiment, a curved notch 321 is provided on the lower middle portion of the waveguide diffraction lens 32. The width of the central lens only needs to cover the circular light exit aperture 332 to allow light to be smoothly coupled into the waveguide diffraction lens 32. The curved notch 321 not only serves as a positioning mechanism for installation, but also reduces lens material consumption, saving costs. Correspondingly, a convex curved surface 352 is provided at the lower end of the retaining groove 351 of the housing backplate 35. The convex curved surface 352 mates with the lower surface of the curved notch 321 of the waveguide diffraction lens 32, ensuring a stable installation of the waveguide diffraction lens 32.

[0041] like Figure 5 As shown, in a preferred embodiment, the waveguide diffraction lens 32 is tilted. Specifically, its top end is close to the image output optical engine 31, and its bottom end is away from the image output optical engine 31. The tilt angle α of the waveguide diffraction lens 32 ranges from 10° to 15°. The tilted waveguide diffraction lens 32 can not only better couple the light from the image output optical engine 31 into the waveguide diffraction lens 32, but also prevent the ambient light below the AR glasses from being reflected to the human eye through the inner mirror surface of the waveguide diffraction lens 32, affecting the viewing of the image on the waveguide diffraction lens 32. Accordingly, the mounting slot 333 of the optical engine main housing 33 and the limiting slot 351 of the housing back plate 35 are both tilted to accommodate the tilted waveguide diffraction lens 32.

[0042] In an optional embodiment, the bottom center of the housing of the device main body 2 extends downward to form a housing 21 for mounting the dual-diffraction optical-mechanical assembly 3. The inner cavity of the device main body 2 is connected to the housing 21, facilitating the wiring strip of the dual-diffraction optical-mechanical assembly 3 to pass through the housing 21 and into the inner cavity of the device main body 2 for electrical connection to the working main board. The housing 21 is equipped with a removable chamber cover 211. Two studs are provided inside the housing 21, and corresponding bolt holes are provided in the chamber cover 211. The main housing 33 of the dual-diffraction optical-mechanical assembly 3 is provided with connecting ears with screw holes. The dual-diffraction optical-mechanical assembly 3 is placed in the housing 21, and the chamber cover 211 is installed. The screw holes of the studs, the screw holes of the connecting ears, and the bolt holes of the chamber cover 211 are aligned. The bolts are passed from the outside to the inside. The bolts are tightened to secure the dual-diffraction optical-mechanical assembly 3 in the housing 21. The side walls of the accommodating cavity 21 and the side walls of the cavity cover 211 are both provided with notches for avoiding the waveguide diffraction lens 32 .

[0043] In the present invention, a transparent protective mirror 4 is provided on the bottom front side of the main body 2 of the device. The material of the protective mirror 4 can be polycarbonate, which has the characteristics of impact resistance and lightness. The material of the protective mirror 4 can also be glass. The glass protective mirror 4 has a higher hardness, a harder and smoother surface, and is not easily scratched. It should be noted that the attached Figure 1In the figure, since the protective mirror 4 is transparent, the effect shown in the figure is that the waveguide diffraction lens 32 and the double diffraction optical machine component 3 can be seen through the protective mirror 4. In fact, the waveguide diffraction lens 32 and the double diffraction optical machine component 3 are located behind the protective mirror 4.

[0044] The bottom of the protective goggles 4 is provided with a support groove 42. When the user wears the AR glasses, the bridge of the nose is placed in the support groove 42, increasing the contact area between the nose bridge and the protective goggles 4, reducing the gravitational pressure of the protective goggles 4 on the nose bridge, and improving wearing comfort. Preferably, a flexible material such as silicone or sponge can be provided at the bottom of the support groove 42.

[0045] like Figure 8 As shown, in a preferred embodiment, the protective glasses 4 are arc-shaped, the chord height of the protective glasses 4 is not less than 2 cm, and the width of the protective glasses 4 is greater than the width of the waveguide diffraction lens 32, so as to provide sufficient space for installing the dual-diffraction optical machine component 3 to avoid affecting the wearing; at the same time, the protective glasses 4 form a semi-enclosed protective structure on the front side of the dual-diffraction optical machine component 3.

[0046] like Figure 3 As shown, an arc-shaped slot 22 is provided at the bottom of the shell of the device main body 2 corresponding to the position of the protective mirror 4, a snap-in block is provided on the inner wall of the shell adjacent to the arc-shaped slot 22, and a snap-in slot 41 is provided at the top of the protective mirror 4. The snap-in slots 41 correspond to the number and position of the snap-in blocks one by one. Through the above structure, the protective mirror 4 and the device main body 2 can be detachably installed, which is convenient for maintenance personnel to repair or replace the aged protective mirror 4.

[0047] In summary, the present invention can effectively prevent the ambient light below from directly entering and being reflected to the user's eyes through the inner mirror by tilting the waveguide diffraction lens, which helps to reduce unnecessary glare or ghosting, thereby improving the visibility and clarity of virtual content; the tilted waveguide diffraction lens design enables the light emitted by the image output optical machine to be more efficiently coupled into the waveguide lens, thereby improving the quality and efficiency of image transmission; a protective mirror is added to the front side of the dual diffraction optical machine assembly to form a semi-enclosed physical barrier, which effectively protects the waveguide diffraction lens from external damage such as scratches and impacts.

[0048] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, and these variations and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. An eyepiece structure of industrial smart AR glasses, characterized in that: Located at the bottom of the device main body of the AR glasses, it includes a dual-diffraction optical machine assembly and a protective mirror. The dual-diffraction optical machine assembly includes an image output optical machine and a waveguide diffraction lens. The image output optical machine is used to output the image source to the waveguide diffraction lens for display. The protective mirror is located on the front side of the dual-diffraction optical machine assembly to form a protective structure; The waveguide diffraction lens is tilted, with its top end close to the image output optical machine and its bottom end away from the image output optical machine.

2. The eyepiece structure of the industrial intelligent AR glasses according to claim 1, characterized in that: The double-diffraction optical machine assembly also includes an optical machine main housing, a housing side cover plate, and a housing back plate. The optical machine main housing has a cavity for installing the image output optical machine, the housing side cover can be detachably installed at the side opening of the optical machine main housing, the protective shell assembled by the optical machine main housing and the housing side cover is provided with a mounting groove, and the housing back plate is correspondingly provided with a limiting groove. The shell back plate can be installed and removed from the protective shell, and the waveguide diffraction lens is fixed by the mutually spliced ​​limiting grooves and mounting grooves.

3. The eyepiece structure of the industrial intelligent AR glasses according to claim 2, characterized in that: A square heat dissipation hole is provided on one side of the main housing of the optical machine, and a circular light exit hole is provided on the other opposite side, and the square heat dissipation hole and the circular light exit hole are located on both sides of the lateral opening.

4. The eyepiece structure of the industrial intelligent AR glasses according to claim 3, characterized in that: The size of the circular light-emitting hole is equal to the size of the light port of the image output optical machine.

5. The eyepiece structure of the industrial intelligent AR glasses according to claim 1, characterized in that: The inclination angle of the waveguide diffraction lens ranges from 10° to 15°.

6. The eyepiece structure of the industrial intelligent AR glasses according to claim 1, characterized in that: The middle of the bottom of the shell of the device main body extends downward to form a accommodating cavity, and the accommodating cavity is communicated with the inner cavity of the device main body; the double diffraction optical machine component is installed in the accommodating cavity.

7. The eyepiece structure of the industrial intelligent AR glasses according to claim 6, characterized in that: The accommodating cavity is provided with a detachable cavity cover, two studs are provided inside the accommodating cavity, the cavity cover is provided with corresponding bolt holes, and the main optical machine housing of the double-diffraction optical machine assembly is provided with a connecting ear with a screw hole.

8. The eyepiece structure of the industrial intelligent AR glasses according to claim 1, characterized in that: The protective mirror is arc-shaped, and the chord height of the protective mirror is not less than 2 cm. The width of the protective mirror is greater than the width of the waveguide diffraction lens.

9. The eyepiece structure of the industrial intelligent AR glasses according to claim 1, characterized in that: An arc-shaped notch is provided on the lower side of the middle portion of the waveguide diffraction lens, and a convex arc surface is provided on the shell back plate of the double diffraction optical machine component, and the convex arc surface is fitted with the lower surface of the arc-shaped notch.

10. The eyepiece structure of the industrial intelligent AR glasses according to claim 1, characterized in that: A supporting groove is provided at the bottom of the protective mirror.

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