AR glasses temple folding structure
By designing a linked temple sleeve and a light-blocking positioning shield structure, the problems of convenient storage and accurate positioning of AR glasses in the traditional form are solved, achieving a balance between portability and display performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU IDEALSEE TECH
- Filing Date
- 2025-08-29
- Publication Date
- 2026-08-04
AI Technical Summary
While pursuing traditional forms, existing AR glasses struggle to achieve convenient storage while ensuring precise coupling between the display optical engine and waveguide, resulting in poor portability and compromised display performance.
Design an AR glasses temple folding structure. Through the linkage of temple sleeve, light-blocking positioning shield and light-blocking shield, the temple can be opened and bent for storage. The positioning connection structure ensures the precise alignment of the display optical engine and waveguide to avoid light leakage.
While reducing the size of components, it achieves convenient storage of traditional glasses, while ensuring the stability and reliability of the display effect, providing accurate positioning performance and protection for the image display elements.
Smart Images
Figure CN224594930U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of AR glasses technology, and in particular to a folding structure for the temples of AR glasses. Background Technology
[0002] Augmented reality (AR) glasses, as a next-generation computing platform, aim to seamlessly overlay virtual information onto the real world, providing users with an immersive experience. To achieve this goal, AR glasses typically integrate a miniature display optical engine and waveguide lenses. The display optical engine is responsible for generating images, while the waveguide lenses transmit the images emitted by the optical engine to the user's eye.
[0003] In current AR glasses designs, to more closely resemble traditional glasses, the display optical engine is typically placed in the temples, with the emitted light directed towards the waveguide coupling area. However, the relative position and angle between the display optical engine and the waveguide coupling area must be extremely precise. Even minute deviations can have catastrophic consequences for image quality. For example, tiny linear displacements in position (X, Y, Z axis offsets) can lead to reduced brightness, poor uniformity, and even cropping of the field of view (FoV). Tiny angular deviations can cause chromatic aberration (rainbow effect), image distortion, blurring, or ghosting. This alignment precision requirement far exceeds the manufacturing tolerances of traditional glasses.
[0004] However, the core function of traditional eyeglass temples is to rotate around a hinge axis for easy storage and wearing. This hinge structure (whether screw-fixed or spring-loaded) typically uses a "clearance fit," and its design does not include maintaining high-precision alignment. Long-term, high-frequency rotation, as well as wear, bumps, and environmental factors (such as thermal expansion and contraction) during daily wear, inevitably lead to structural loosening and tolerance accumulation in the hinge structure that is imperceptible to the naked eye but fatal to the optical system. This causes a shift in the relative position of the display optical engine and the waveguide coupling area, severely affecting the display performance of AR glasses.
[0005] To circumvent the aforementioned problems, existing technologies generally employ a compromise: the front temple section, which contains the display optical engine, is fixedly connected to the frame as a single, immovable rigid unit, thus ensuring that the relative positions of the optical engine and waveguide are permanently locked after leaving the factory. The rear section of the temple is designed as a bendable or detachable structure to accommodate different head shapes and facilitate storage.
[0006] Although this solution has solved the technical problem of the relative positional misalignment between the display optical engine and the waveguide coupling area to some extent, its overall volume after storage is much larger than that of traditional folded glasses because the temples are usually only bent inward. This makes it impossible to fit into a standard-sized glasses case, significantly reducing portability.
[0007] Therefore, while pursuing the traditional form of glasses, how to achieve convenient storage while ensuring precise coupling between the display optical engine and the waveguide is a key technical problem that the industry urgently needs to solve. Utility Model Content
[0008] This application provides an AR glasses temple folding structure that, while being more similar in shape to traditional glasses, offers good protection and light-blocking performance as well as accurate positioning performance.
[0009] To achieve the above objectives, this application provides a folding temple structure for AR glasses, which includes a frame, a waveguide lens disposed within the frame, and a temple on each of the left and right sides of the frame. The side of the temple relative to the frame is designated as the rear side, and the extension plane of the waveguide lens is designated as a vertical plane perpendicular to the front-rear direction. The front ends of both temples are connected to the frame via positioning connectors.
[0010] The positioning connector includes a temple sleeve, a light-shielding positioning cover, and a light-shielding cover. Both the light-shielding positioning cover and the light-shielding cover are C-shaped sleeves with an opening on one side.
[0011] The sunshade extends roughly along the front-to-back direction, with its opening located on the side furthest from the outer edge of the frame on either side. The front end of the sunshade is fixedly connected to the frame.
[0012] The light-shielding positioning cover is installed inside the light-shielding cover, and the opening of the light-shielding positioning cover is on the same side as the opening of the light-shielding cover.
[0013] The opening side of the light-shielding positioning cover is hinged to the opening side of the light-shielding cover by a hinge axis extending approximately in a vertical direction, and the light-shielding positioning cover rotates relative to the light-shielding cover about the hinge axis.
[0014] The temple sleeve includes a sleeve body for fixing the front end of the temple, the front end of the temple passing through the sleeve body and extending beyond the front face of the sleeve body.
[0015] The front end of the sleeve body is provided with a hinge part, which extends into the interior of the light-shielding positioning cover and is hinged to the hinge axis. The part of the front end of the temple that extends beyond the sleeve body extends into the light-shielding positioning cover.
[0016] A positioning connection structure is provided between the hinge and the light-shielding positioning cover. The positioning connection structure ensures that when the sleeve body and the light-shielding positioning cover rotate relative to each other around the hinge axis, there is a relative rotation limit position during the rotation process in different rotation directions. After reaching the relative rotation limit position, the sleeve body drives the light-shielding positioning cover to rotate through the positioning connection structure.
[0017] Therefore, when the temple is in the open state, the sleeve body and the light-blocking positioning shield are at the first relative rotation limit position, and when the temple is in the closed state, the sleeve body and the light-blocking positioning shield are at the second relative rotation limit position.
[0018] Specifically, the positioning connection structure includes a first positioning connection structure disposed between the hinge portion and the upper side wall of the light-shielding positioning cover, and a second positioning connection structure disposed between the hinge portion and the lower side wall of the light-shielding positioning cover. The first and second positioning connection structures allow the hinge portion and the light-shielding positioning cover to have a certain degree of freedom to rotate relative to each other around the hinge axis; the first and second positioning connection structures move synchronously and cooperatively, so that when the sleeve body and the light-shielding positioning cover rotate relative to each other around the hinge axis in both directions, they have a relative rotation limit position during the rotation process in different rotation directions.
[0019] Furthermore, during the process of opening the temple from the retracted state to the open state, the sleeve body rotates forward around the hinge axis with the temple. The sleeve body and the light-shielding positioning shield rotate forward relative to each other from the second relative rotation limit position. When the first relative rotation limit position is reached, the sleeve body drives the light-shielding positioning shield to rotate forward around the hinge axis through the positioning connection structure until the temple reaches the open state. The sleeve body and the light-shielding positioning shield are at the first relative rotation limit position and are coaxial.
[0020] Specifically, image display elements are located at the front of both the left and right temples. These elements emit image light forward along the temple's extension direction. Waveguide lenses guide the image light emitted by the display elements, along with ambient light, into the eye. The area of the waveguide lens that receives the image light emitted by the display elements is called the coupling region. A light-transmitting hole is located at the coupling region of the waveguide lens on the frame, exposing this region. This light-transmitting hole is situated within the area surrounded by a light-shielding shield. Furthermore, when the light-shielding positioning shield is rotated to be coaxial with it, the light-transmitting hole is located within the area surrounded by the light-shielding positioning shield.
[0021] Specifically, the cross-section of the light-shielding positioning cover and the light-shielding cover at any position is a C-shaped cross-section when cut by a plane perpendicular to their axis.
[0022] Optionally, the front end face of the light-shielding positioning cover is provided with a first snap-fit positioning structure, and the frame is provided with a second snap-fit positioning structure that cooperates with the first snap-fit positioning structure for positioning. When the light-shielding positioning cover rotates forward around the hinge axis until its axial extension direction is perpendicular to the extension plane of the waveguide lens on its front side, the front end face of the light-shielding positioning cover is in close contact with the frame, and the first snap-fit positioning structure and the second snap-fit positioning structure cooperate to snap together, which not only positions the temple but also prevents the light-shielding positioning cover from continuing to rotate forward. At this time, the temple is in the open state, and the light beam emitted from the image display element inside the temple enters the coupling area through the light-transmitting hole. Obviously, the second snap-fit positioning structure is located inside the light-shielding cover and outside the light-transmitting hole.
[0023] During the process of the temple rotating from the open state to the closed state, the sleeve body rotates in the opposite direction around the hinge axis along with the temple. The sleeve body and the light-shielding positioning shield rotate in opposite directions from the first relative rotation limit position. When the second relative rotation limit position is reached, the sleeve body drives the light-shielding positioning shield to rotate in the opposite direction around the hinge axis through the positioning connection structure until the temple reaches the closed state.
[0024] Optionally, a stop block is provided on the side of the frame near the opening of the sunshade. When the temple is in the retracted state, the sleeve body contacts the stop block, which restricts the continued reverse rotation of the sleeve body. More preferably, a stop surface is provided on the front end face of the sunshade positioning cover near the opening of the sunshade positioning cover. When the temple is in the retracted state, the stop surface contacts the frame, and the frame restricts the continued reverse rotation of the sunshade positioning cover through the stop surface.
[0025] In some preferred embodiments, when the temple is in the open state, the front end face of the temple is located within the light-transmitting aperture, thereby bringing the image display element of the temple closer to the waveguide lens. This requires the aperture diameter to be larger than the outer diameter of the front end of the temple so that the rotation of the temple about the hinge axis is not interfered with. Similarly, the axial length of the portion of the front end of the temple extending beyond the sleeve body is determined to not interfere with the rotation of the temple about the hinge axis, including but not limited to not affecting the first relative rotation limit position and the second relative rotation limit position between the sleeve body and the light-shielding positioning cover, not affecting the engagement of the first snap-fit positioning structure and the second snap-fit positioning structure, and not affecting the temple reaching the retracted state.
[0026] Optionally, the first positioning connection structure includes an arc-shaped guide groove on the side wall of the upper side of the light-shielding positioning cover and a connecting post on the upper side of the hinge. The center of the arc-shaped guide groove is located on the axis of the hinge shaft. The width of the arc-shaped guide groove matches the outer diameter of the connecting post. The connecting post is slidably disposed in the arc-shaped guide groove. When the temple sleeve rotates bidirectionally relative to the light-shielding positioning cover around the hinge shaft, the connecting post slides bidirectionally along the arc-shaped guide groove within the arc-shaped guide groove.
[0027] Optionally, the second positioning connection structure includes an arc-shaped guide groove disposed on the side wall of the lower side of the light-shielding positioning cover and a connecting post disposed on the lower side of the hinge. The center of the arc-shaped guide groove is located on the axis of the second hinge shaft. The width of the arc-shaped guide groove matches the outer diameter of the connecting post. The connecting post is slidably disposed in the arc-shaped guide groove. When the temple sleeve rotates bidirectionally relative to the light-shielding positioning cover around the hinge shaft, the connecting post slides bidirectionally along the arc-shaped guide groove within the arc-shaped guide groove.
[0028] Optionally, the first snap-fit positioning structure is a snap-fit groove provided on the front end face of the light-shielding positioning cover, and the second snap-fit positioning structure is a snap-fit protrusion provided on the frame that corresponds to and cooperates with the snap-fit groove.
[0029] One or more technical solutions in this application have at least the following technical effects or advantages:
[0030] This application, by setting up linked temple sleeves, light-shielding positioning covers, and light-shielding covers that serve as the mounting base for the hinge axis, achieves both the opening and folding of temples similar to traditional eyeglasses, while minimizing the size of the components, and provides precise and stable positioning to prevent light leakage, ensuring the stability and reliability of the display effect. Simultaneously, the light-shielding covers and the light-shielding positioning covers form a protective shell for housing the front image display element of the temples, providing protection for the image display element regardless of the temple's position. Attached Figure Description
[0031] Figure 1 This is a schematic diagram of the structure of this application;
[0032] Figure 2 This is a schematic diagram of the mating structure of the temple sleeve, the light-shielding positioning shield, and the light-shielding shield in this application;
[0033] Figure 3 This is a schematic diagram of the structure of the temple sleeve;
[0034] Figure 4 A schematic diagram of the structure of the light-shielding positioning shield;
[0035] Figure 5 This is a schematic diagram of the mating structure between the temple sleeve and the light-shielding positioning cover;
[0036] Figure 6 A schematic diagram of the structure in which the sleeve body and the light-shielding positioning cover are in the second relative rotation limit position during the retraction of the temple;
[0037] Figure 7This is a schematic diagram of the structure when the temple of the glasses is in the first relative rotational limit position between the sleeve body and the light-shielding positioning cover during the opening of the temple.
[0038] Figure 8 This is a schematic diagram of the structure of the temples of the glasses in the open state. Detailed Implementation
[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0040] like Figure 1 As shown, this application provides an AR glasses temple folding structure, which includes a frame 100, a waveguide lens 200 disposed inside the frame 100, and a temple 300 disposed on each of the left and right sides of the frame 100. The side of the temple 300 relative to the frame 100 is the rear side, and the extension plane of the waveguide lens 200 is the vertical plane perpendicular to the front-back direction. The front ends of the two temples 300 are connected to the frame 100 through positioning connectors. An image display element is disposed at the front of the left temple 300 and the right temple 300. The image display element emits image light forward along the extension direction of the temple 300. The waveguide lens 200 is used to guide the image light emitted by the image display element and the external real ambient light into the human eye. The area of the waveguide lens 200 used to receive the image light emitted by the image display element is the coupling area.
[0041] It should be noted that in some embodiments, the waveguide lenses 200 on the left side and the right side of the frame 100 are not on the same plane. In this case, the extended plane of the waveguide lens 200 on the same side as a certain temple 300 is regarded as a vertical plane in the coordinate system that describes the connection structure between the temple 300 on that side and the frame 100, which is perpendicular to the front and back direction.
[0042] Combination Figure 1 , Figure 2 As shown, the positioning connector includes a temple sleeve 401, a light-shielding positioning cover 402, and a light-shielding cover 403. Both the light-shielding positioning cover 402 and the light-shielding cover 403 are C-shaped sleeves with an opening on one side. That is, the cross-section of the light-shielding positioning cover 402 and the light-shielding cover 403 at any position is a C-shaped cross-section when cut by a plane perpendicular to its axis.
[0043] The sunshade 403 extends approximately along the front-to-back direction, with its opening located on the left and right sides away from the outer edge of the frame 100. The front end of the sunshade 403 is fixedly connected to the frame 100.
[0044] A light-shielding positioning cover 402 is disposed inside a light-shielding cover 403, and the opening of the light-shielding positioning cover 402 and the opening of the light-shielding cover 403 are on the same side.
[0045] The opening side of the light-shielding positioning cover 402 is hinged to the opening side of the light-shielding cover 403 by a hinge axis 404 extending in a generally vertical direction, and the light-shielding positioning cover 402 rotates relative to the light-shielding cover 403 about the hinge axis 404.
[0046] The frame 100 is provided with a light-transmitting hole 101 for exposing the coupling area at the coupling area position of the waveguide lens 200. The light-transmitting hole 101 is located in the area surrounded by the light-shielding cover 403. Furthermore, when the light-shielding positioning cover 402 is rotated to be coaxial with the light-shielding cover 403, the light-transmitting hole 101 is located in the area surrounded by the light-shielding positioning cover 402.
[0047] Combination Figure 3 , Figure 4 , Figure 5 As shown, the temple sleeve 401 includes a sleeve body 4011 for fixing the front end of the temple 300. The front end of the temple 300 passes through the sleeve body 4011 and extends beyond the front end face of the sleeve body 4011.
[0048] The front end of the sleeve body 4011 is provided with a hinge part 4012. The hinge part 4012 extends into the interior of the light-shielding positioning cover 402 and is hinged to the hinge shaft 404. The front end of the temple 300 extends beyond the sleeve body 4011 into the light-shielding positioning cover 402.
[0049] A first positioning connection structure is provided between the hinge portion 4012 and the upper side wall of the light-shielding positioning cover 402, and a second positioning connection structure is provided between the hinge portion 4012 and the lower side wall of the light-shielding positioning cover 402.
[0050] The first positioning connection structure and the second positioning connection structure enable the hinge part 4012 and the light-shielding positioning cover 402 to have a certain degree of freedom to rotate relative to each other around the hinge axis 404. The first positioning connection structure and the second positioning connection structure work synchronously and in coordination, so that when the sleeve body 4011 and the light-shielding positioning cover 402 rotate relative to each other around the hinge axis 404 in both directions, there is a relative rotation limit position during the rotation process in different rotation directions. After reaching the relative rotation limit position, the sleeve body 4011 drives the light-shielding positioning cover 402 to rotate through the first positioning connection structure and the second positioning connection structure.
[0051] Therefore, when the temple 300 is in the open state, the sleeve body 4011 and the light-shielding positioning cover 402 are at the first relative rotation limit position, and when the temple 300 is in the closed state, the sleeve body 4011 and the light-shielding positioning cover 402 are at the second relative rotation limit position.
[0052] Combination Figure 1 , Figure 8 , Figure 6 and Figure 7 As shown, specifically, during the process of the temple 300 opening from the retracted state to the open state, the sleeve body 4011 rotates forward around the hinge axis 404 with the temple 300. The sleeve body 4011 and the light-shielding positioning cover 402 rotate relative to each other from the second relative rotation limit position. When the first relative rotation limit position is reached, the sleeve body 4011 drives the light-shielding positioning cover 402 to rotate forward around the hinge axis 404 through the positioning connection structure until the temple 300 reaches the open state. The sleeve body 4011 and the light-shielding positioning cover 402 are in the first relative rotation limit position, and the sleeve body 4011 and the light-shielding positioning cover 402 are coaxial.
[0053] The front end of the light-shielding positioning cover 402 is provided with a first snap-fit positioning structure 503, and the frame 100 is provided with a second snap-fit positioning structure 504 that cooperates with the first snap-fit positioning structure 503 for positioning. When the light-shielding positioning cover 402 rotates forward around the hinge axis 404 until its axial extension direction is perpendicular to the extension plane of the waveguide lens 200 on its front side, the front end of the light-shielding positioning cover 402 is in close contact with the frame 100, and the first snap-fit positioning structure 503 and the second snap-fit positioning structure 504 cooperate to snap-fit, which not only positions the temple but also prevents the light-shielding positioning cover 402 from continuing to rotate forward. At this time, the temple 300 is in the open state. At this time, the light beam emitted from the image display element inside the temple 300 enters the coupling area through the light-transmitting hole 101. Obviously, the second snap-fit positioning structure 504 is located inside the light-shielding cover 403 and outside the light-transmitting hole 101.
[0054] During the process of the temple 300 rotating from the open state to the closed state, the sleeve body 4011 rotates in the opposite direction around the hinge axis 404 along with the temple 300. The sleeve body 4011 and the light-shielding positioning cover 402 rotate in opposite directions from the first relative rotation limit position. When the second relative rotation limit position is reached, the sleeve body 4011 drives the light-shielding positioning cover 402 to rotate in the opposite direction around the hinge axis 404 through the positioning connection structure until the temple 300 reaches the closed state.
[0055] A stop block is provided on the side of the frame 100 near the opening of the light-shielding cover 403. When the temple 300 is in the retracted state, the sleeve body 4011 contacts the stop block, which restricts the continued reverse rotation of the sleeve body 4011. More preferably, a stop surface is provided on the front end face of the light-shielding positioning cover 402 near its opening. When the temple 300 is in the retracted state, the stop surface contacts the frame 100, and the frame 100 restricts the continued reverse rotation of the light-shielding positioning cover 402 through the stop surface.
[0056] In some preferred embodiments, when the temple 300 is in the open state, the front end face of the temple 300 is located within the light-transmitting hole 101, thereby bringing the image display element of the temple 300 closer to the waveguide lens 200. This requires the aperture of the light-transmitting hole 101 to be larger than the outer diameter of the front end of the temple 300 so that the rotation of the temple 300 around the hinge axis 404 is not interfered with. Similarly, the axial length of the portion of the front end of the temple 300 extending beyond the sleeve body 4011 is determined to not interfere with the rotation of the temple 300 around the hinge axis 404, including but not limited to not affecting the first relative rotation limit position and the second relative rotation limit position between the sleeve body 4011 and the light-shielding positioning cover 402, not affecting the engagement of the first snap-fit positioning structure 503 and the second snap-fit positioning structure 504, and not affecting the temple 300 reaching the retracted state.
[0057] Optionally, the first positioning connection structure includes an arc-shaped guide groove 5011 disposed on the side wall of the upper side of the light-shielding positioning cover 402 and a connecting post 5021 disposed on the upper side of the hinge part 4012. The center of the arc-shaped guide groove 5011 is located on the axis of the hinge shaft 404. The width of the arc-shaped guide groove 5011 matches the outer diameter of the connecting post 5021. The connecting post 5021 is slidably disposed in the arc-shaped guide groove 5011. When the temple sleeve 401 rotates bidirectionally relative to the light-shielding positioning cover 402 around the hinge shaft 404, the connecting post 5021 slides bidirectionally along the arc-shaped guide groove 5011 within the arc-shaped guide groove 5011.
[0058] Optionally, the second positioning connection structure includes an arc-shaped guide groove 5012 disposed on the side wall of the lower side of the light-shielding positioning cover 402 and a connecting post 5022 disposed on the lower side of the hinge part 4012. The center of the arc-shaped guide groove 5012 is located on the axis of the second hinge shaft 404. The width of the arc-shaped guide groove 5012 matches the outer diameter of the connecting post 5022. The connecting post 5022 is slidably disposed in the arc-shaped guide groove 5012. When the temple sleeve 401 rotates bidirectionally relative to the light-shielding positioning cover 402 around the hinge shaft 404, the connecting post 5022 slides bidirectionally along the arc-shaped guide groove 5012 within the arc-shaped guide groove 5012.
[0059] Optionally, the first snap-fit positioning structure 503 is a snap-fit groove provided on the front end face of the light-shielding positioning cover 402, and the second snap-fit positioning structure 504 is a snap-fit protrusion provided on the frame 100 that corresponds to and cooperates with the snap-fit groove.
[0060] Optionally, in order to reduce the friction between the light-shielding positioning cover 402 and the light-shielding cover 403 and the temple sleeve 401 when the light-shielding positioning cover 402 rotates, and to facilitate the opening and closing of the temple 300, the light-shielding positioning cover 402 is preferably made of wear-resistant lubricating material, such as POM or PTFE.
[0061] The advantage of this application lies in the fact that, by setting up a linked temple sleeve 401, a light-shielding positioning cover 402, and a light-shielding cover 403 serving as the mounting base for the hinge axis 404, it achieves the opening and bending of the temple 300, similar to traditional eyeglasses, while minimizing the size of the components. Furthermore, it provides precise and stable positioning while preventing light leakage, ensuring the stability and reliability of the display effect. Simultaneously, the light-shielding cover 403 and the light-shielding positioning cover 402 form a protective shell for housing the front image display element of the temple 300, providing protection for the image display element regardless of the temple 300's position.
[0062] It should be noted that the above embodiments are illustrative of this application and not limiting of it, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The words “comprising” or “including” do not exclude the presence of elements or steps not listed in the claims. The words “a” or “an” preceding an element do not exclude the presence of a plurality of such elements. The use of the words first, second, and third, etc., does not indicate any order and these words can be interpreted as names.
[0063] All features disclosed in this specification, except for mutually exclusive features, can be combined in any way.
[0064] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.
[0065] This application is not limited to the specific embodiments described above. This application extends to any new features or combinations disclosed in this specification, as well as any new steps or combinations of any new methods or processes disclosed.
Claims
1. An AR glasses temple folding structure, characterized by, The frame includes a waveguide lens inside, and a temple on each side of the frame. The side of the temple relative to the frame is considered the rear side, and the extension plane of the waveguide lens is considered the vertical plane perpendicular to the front-rear direction. The front ends of both temples are connected to the frame via positioning connectors. The positioning connector includes a temple sleeve, a light-shielding positioning cover, and a light-shielding cover. Both the light-shielding positioning cover and the light-shielding cover are C-shaped sleeves with an opening on one side. The sunshade extends roughly along the front-to-back direction, with its opening located on the side furthest from the outer edge of the frame on either side. The front end of the sunshade is fixedly connected to the frame. The light-shielding positioning cover is installed inside the light-shielding cover, and the opening of the light-shielding positioning cover is on the same side as the opening of the light-shielding cover. The opening side of the light-shielding positioning cover is hinged to the opening side of the light-shielding cover by a hinge axis extending approximately in a vertical direction, and the light-shielding positioning cover rotates relative to the light-shielding cover about the hinge axis. The temple sleeve includes a sleeve body for fixing the front end of the temple, the front end of the temple passing through the sleeve body and extending beyond the front end face of the sleeve body. The front end of the sleeve body is provided with a hinge part, which extends into the interior of the light-shielding positioning cover and is hinged to the hinge axis. The part of the front end of the temple that extends beyond the sleeve body extends into the light-shielding positioning cover. A positioning connection structure is provided between the hinge and the light-shielding positioning cover. The positioning connection structure ensures that when the sleeve body and the light-shielding positioning cover rotate relative to each other around the hinge axis, there is a relative rotation limit position during the rotation process in different rotation directions. After reaching the relative rotation limit position, the sleeve body drives the light-shielding positioning cover to rotate through the positioning connection structure.
2. An AR glasses temple folding structure as claimed in claim 1, wherein, The positioning connection structure includes a first positioning connection structure between the hinge part and the upper side wall of the light-shielding positioning cover, and a second positioning connection structure between the hinge part and the lower side wall of the light-shielding positioning cover. The first and second positioning connection structures allow the hinge part and the light-shielding positioning cover to have a certain degree of freedom to rotate relative to each other around the hinge axis. The first and second positioning connection structures work synchronously and in coordination, so that when the sleeve body and the light-shielding positioning cover rotate relative to each other around the hinge axis in both directions, they have a relative rotation limit position during the rotation process in different rotation directions.
3. The AR glasses temple fold structure of claim 1, wherein, Image display elements are provided at the front of both the left and right temples. The image display elements emit image light forward along the extension direction of the temples. Waveguide lenses are used to guide the image light emitted by the image display elements and the external ambient light into the human eye. The area of the waveguide lenses used to receive the image light emitted by the image display elements is the coupling area.
4. An AR eyeglass temple fold structure as claimed in claim 3, wherein, The frame has a light-transmitting hole at the coupling area of the waveguide lens to expose the coupling area. The light-transmitting hole is located in the area surrounded by the light-shielding shield.
5. The AR glasses temple fold structure of claim 1, wherein, Both the light-shielding positioning cover and the light-shielding cover have C-shaped cross sections when cut at any position by a plane perpendicular to their axis.
6. An AR glasses temple fold structure as claimed in claim 4, wherein, When the light-shielding positioning cover is rotated to be coaxial with the light-shielding cover, the light-transmitting hole is located in the area surrounded by the light-shielding positioning cover.
7. The AR glasses temple fold structure of claim 1, wherein, When the temples are open, the sleeve body and the light-blocking positioning shield are at the first relative rotation limit position. When the temples are closed, the sleeve body and the light-blocking positioning shield are at the second relative rotation limit position.
8. The AR glasses temple fold structure of claim 1, wherein, The front end face of the light-shielding positioning cover is provided with a first snap-fit positioning structure, and the lens frame is provided with a second snap-fit positioning structure that cooperates with the first snap-fit positioning structure for positioning. When the light-shielding positioning cover rotates around the hinge axis in the positive direction until its axial extension direction is perpendicular to the extension plane of the waveguide lens on its front side, the front end face of the light-shielding positioning cover is in close contact with the lens frame, and the first snap-fit positioning structure and the second snap-fit positioning structure cooperate to snap together.
9. An AR glasses temple fold structure as claimed in claim 8, wherein, The first snap-fit positioning structure is a snap-fit groove provided on the front end face of the light-shielding positioning cover, and the second snap-fit positioning structure is a snap-fit protrusion provided on the frame that corresponds to and cooperates with the snap-fit groove.
10. The AR glasses temple fold structure of claim 1, wherein, A stop block is provided on the side of the frame near the opening of the sunshade. When the temple is in the retracted state, the sleeve body contacts the stop block.
11. The AR glasses temple fold structure of claim 1, wherein, When the temples are in the open position, the front surface of the temples is located inside the light-transmitting hole.
12. An AR glasses temple fold structure as claimed in claim 2, wherein, The first positioning connection structure includes an arc-shaped guide groove on the side wall of the upper side of the light-shielding positioning cover and a connecting post on the upper side of the hinge. The center of the arc-shaped guide groove is located on the axis of the hinge shaft. The width of the arc-shaped guide groove matches the outer diameter of the connecting post. The connecting post is slidably disposed in the arc-shaped guide groove. When the temple sleeve rotates bidirectionally relative to the light-shielding positioning cover around the hinge shaft, the connecting post slides bidirectionally along the arc-shaped guide groove within the arc-shaped guide groove.
13. The AR glasses temple folding structure of claim 2 or 12, wherein, The second positioning connection structure includes an arc-shaped guide groove on the side wall of the lower side of the light-shielding positioning cover and a connecting post on the lower side of the hinge. The center of the arc-shaped guide groove is located on the axis of the second hinge shaft. The width of the arc-shaped guide groove matches the outer diameter of the connecting post. The connecting post is slidably disposed in the arc-shaped guide groove. When the temple sleeve rotates bidirectionally relative to the light-shielding positioning cover around the hinge shaft, the connecting post slides bidirectionally along the arc-shaped guide groove within the arc-shaped guide groove.