Focusing assembly and AR ray machine module

Abstract

The utility model relates to a focusing assembly and an AR light machine module, the focusing assembly comprises a lens cup, a focusing upper cover, a guide rail, a sliding frame and a focusing screw rod, the guide rail is fixedly connected to the lens cup, the focusing upper cover is installed on the lens cup and is provided with a via hole in clearance fit with the guide rail, the focusing screw rod is rotatably installed on the upper cover, and the sliding frame is slidably installed on the guide rail and is used for installing an imaging assembly. The focusing screw rod is rotatably installed on the upper cover and is in threaded connection with the sliding frame to drive the sliding frame to slide along the guide rail, so that the imaging assembly is driven to move along the guide rail, and the distance between the imaging assembly and the lens assembly is adjusted. The stability of the guide rail installed on the lens cup is high, the stability of the sliding process of the sliding frame and the imaging assembly sliding along with the sliding frame is further improved, and the guide rail is prevented from inclining due to errors generated when the focusing upper cover and the lens cup are assembled. In addition, the upper cover does not need to be matched to implement image combination adjustment, so that the avoidance space reserved for the focusing screw rod is relatively small, and the utilization rate of the internal space of the AR light machine module is favorably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of AR glasses focusing, in particular to a focusing component and an AR optical machine module. Background Art

[0002] The existing design of a zoom AR module uses a sliding assembly that moves the screen and lens axially via a guide rail. The module's top cover is equipped with a knob connected to the sliding assembly to facilitate user adjustment of the module's diopter. The guide rail is fixed to the top cover, and the image alignment needs to be ensured by adjusting the position of the top cover. This existing design has two problems: first, adjusting the image alignment by adjusting the top cover will cause the position of the knob to deviate. At the same time, the guide rail is also installed on the top cover, causing the lens assembly to be focused to deflect and tilt, thereby reducing focusing accuracy. Second, the position accuracy of the top cover in this adjustment method is not high, and space for adjustment to avoid interference must be reserved in advance. This will make the product larger horizontally and vertically, affecting the user's wearing experience. Utility Model Content

[0003] Since the AA adjustment in the existing zoom AR module will affect the installation position of the adjustment knob for diopter adjustment, which further leads to a large diopter adjustment error, it is necessary to provide a focusing component and an AR optical machine module.

[0004] Focusing components for AR optical modules, including:

[0005] Mirror cup;

[0006] A guide rail, the guide rail being fixedly connected to the mirror cup;

[0007] A focusing upper cover, which is mounted on the lens cup and is provided with a through hole that is gap-matched with the guide rail;

[0008] a slide, the slide being slidably mounted on the guide rail and being used to mount the imaging component of the AR optical machine module; and

[0009] A focusing screw is rotatably mounted on the focusing upper cover and is screwed to the slide to drive the imaging assembly to move along the guide rail.

[0010] With this arrangement, the guide rail installed on the mirror cup has higher stability, further improving the stability of the sliding process of the slide and the imaging component that slides with the slide. The clearance between the other end of the guide rail and the focusing cover also avoids the error in assembling the focusing cover and the mirror cup from causing the guide rail to tilt. In addition, since there is no need to adjust the cover, the avoidance space reserved for the focusing screw is also smaller, which is also beneficial to improving the internal space utilization of the AR optical machine module.

[0011] In one embodiment, the slide is provided with a threaded through hole that cooperates with the thread of the focusing screw, and the major diameter of the threaded portion of the focusing screw is larger than the minor diameter of the threaded through hole and smaller than the major diameter of the threaded through hole.

[0012] This arrangement not only prevents the focusing screw from slipping out of the threaded through hole, but also ensures that the slide is only subjected to the axial force exerted by the focusing screw. The assembly error caused by the tilt or radial deviation of the focusing screw itself will not be further transmitted to the slide, thereby ensuring the smoothness of the slide sliding, which is beneficial to improving the focusing accuracy of the AR optical machine module.

[0013] In one embodiment, the focusing upper cover is provided with a screw through hole, and the focusing assembly further comprises a fastening screw, which is passed through the screw through hole and screwed to the lens cup;

[0014] The hole diameter of the screw through hole is larger than the major diameter of the fastening screw, and the difference between the hole diameter of the screw through hole and the major diameter of the fastening screw is greater than or equal to 0.1 mm and less than or equal to 0.15 mm.

[0015] With this arrangement, the assembler can repeatedly debug the installation position of the focusing screw when installing the focusing cover, thereby ensuring smooth assembly of the focusing screw and the threaded through hole.

[0016] In one embodiment, the diameter range of the guide rail is greater than or equal to 11.99 mm and less than or equal to 12 mm, and the mirror cup is provided with a first assembly hole that is interference fit with the guide rail, and the aperture range of the first assembly hole is greater than or equal to 11.98 mm and less than or equal to 11.995 mm.

[0017] With this arrangement, the interference fit between the guide rail and the mirror cup facilitates assembly, and within this range, the tightness of the assembly between the guide rail and the mirror cup can be ensured without damaging the guide rail or the mirror cup.

[0018] In one embodiment, the diameter of the via hole is greater than or equal to 1.4 mm and less than or equal to 1.45 mm.

[0019] With this arrangement, within this range, the error in assembling the focusing cover and the lens cup will not affect the guide rail. At the same time, the through hole corresponds to the position of the guide rail, which facilitates the rapid positioning of the focusing cover to the preset position of the lens cup during assembly.

[0020] In one embodiment, the slide bracket is provided with a sliding hole that is clearance-matched with the guide rail, and the aperture range of the sliding hole is greater than or equal to 11.975 mm and less than or equal to 12.005 mm.

[0021] Such an arrangement, combined with lubricating the guide rail with grease, can ensure smooth sliding of the slide.

[0022] In one embodiment, the number of the guide rails is at least two, and at least two of the guide rails are arranged in parallel on both sides of the focusing screw.

[0023] This arrangement balances the driving force of the focusing screw on the slide, improving the smoothness of the slide.

[0024] In one embodiment, the focusing cover is provided with a second assembly hole, and the focusing screw includes a mounting portion rotatably mounted on the second assembly hole, a screw portion extending from the mounting portion toward the lens cup, and an interface portion extending axially from the mounting portion away from the screw portion.

[0025] With such arrangement, the focusing screw and the focusing upper cover can be pre-assembled, thereby facilitating subsequent assembly.

[0026] In one embodiment, the mounting portion includes a carrier body with a snap-fit ​​groove formed in an annular direction and a sealing ring snap-fitted to the snap-fit ​​groove, and the sealing ring is snap-fitted to the inner wall of the second assembly hole.

[0027] With this arrangement, the focusing screw can rotate and seal the second assembly hole at the same time through the interference fit between the sealing ring and the focusing cover. It can be stopped and positioned at any time during the adjustment process, and can also prevent external dust from entering, which is conducive to maintaining the airtightness of the internal space of the AR optical machine module.

[0028] This application also provides an AR optical machine module, including:

[0029] Optical machine bracket;

[0030] As the above-mentioned focusing assembly, the focusing assembly is installed on the optical machine bracket;

[0031] an imaging assembly, the imaging assembly being mounted on a slide of the focusing assembly; and

[0032] A lens assembly is mounted on the lens cup of the focusing assembly and is located in the optical path of the imaging assembly.

[0033] With such a setting, the focusing assembly provided in this application can achieve tight adjustment of the refractive power of the AR optical machine module without changing the volume of the existing AR optical machine module, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the structure of an AR optical machine module in one embodiment of the present invention;

[0035] Figure 2 for Figure 1Schematic diagram of the structure after the middle focusing component and imaging component are assembled;

[0036] Figure 3 for Figure 2 A cross-sectional view of the focusing assembly and the imaging assembly at the focusing screw;

[0037] Figure 4 for Figure 3 A partial enlarged view of the X in the middle;

[0038] Figure 5 for Figure 2 Schematic diagram of the structure of the middle mirror cup;

[0039] Figure 6 for Figure 2 Schematic diagram of the structure of the middle focus upper cover;

[0040] Figure 7 for Figure 2 Schematic diagram of the structure of the middle slide;

[0041] Figure 8 for Figure 2 Schematic diagram of the structure of the center focusing screw.

[0042] Reference numerals:

[0043] 100. Focusing assembly; 10. Mirror cup; 11. First assembly hole; 12. Limit hole; 13. Mounting hole; 20. Guide rail; 30. Slide; 31. Threaded through hole; 32. Sliding hole; 40. Focusing cover; 41. Through hole; 42. Second assembly hole; 43. Support platform; 44. Screw through hole; 50. Focusing screw; 51. Mounting part; 511. Carrier; 512. Sealing ring; 52. Screw part; 521. Smooth section; 522. Threaded section; 53. Interface part; 531. Stop ring; 54. Open retaining ring; 60. Fastening screw; 200. Optical machine bracket; 300. Imaging assembly; 310. Display screen; 320. Diopter; 400. Lens assembly; 410. Lens holder. DETAILED DESCRIPTION

[0044] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 should not be understood as a limitation to the present invention.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0047] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0048] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0049] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may 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. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0050] The existing design of a zoom AR module is that the sliding assembly of the screen and lens assembly moves axially via a guide rail. The upper cover of the module is equipped with a knob connected to the sliding assembly to facilitate user adjustment of the module's diopter. The guide rail is fixed to the upper cover, and the image alignment needs to be ensured by adjusting the position of the upper cover. This existing design has two problems: first, adjusting the image alignment by adjusting the upper cover will cause the position of the knob to deviate. At the same time, the guide rail is also installed on the upper cover, causing the lens assembly to be focused to deflect and tilt, thereby reducing the focusing accuracy. Second, the position accuracy of the upper cover in this adjustment method is not high, and space for adjustment to avoid interference must be reserved in advance, which will make the horizontal and vertical dimensions of the product larger, affecting the user's wearing experience.

[0051] Based on this, it is necessary to provide a focusing component and an AR optical machine module that can improve the accuracy of diopter adjustment while minimizing the product size.

[0052] See also Figure 1 、 Figure 2 and Figure 3 , Figure 1 Schematic diagram of the structure of the AR optical machine module in one embodiment of the present invention. Figure 2 for Figure 1 Schematic diagram of the structure after the middle focusing assembly 100 and the imaging assembly 300 are assembled, Figure 3 for Figure 2The focus assembly 100 and the imaging assembly 300 are shown in a cross-sectional view at the focus screw 50. Specifically, in this embodiment, the AR optical engine module includes an optical engine bracket 200, two focus assemblies 100, and an imaging assembly 300 and a lens assembly 400 arranged corresponding to the focus assemblies 100. The imaging assembly 300 includes a display screen 310 and a diopter 320 respectively mounted on the upper and lower sides of the slide 30. The lens assembly 400 includes a lens frame 410 fixedly connected to the lens cup 10 and a lens body (not shown). The focusing assembly 100 includes a lens cup 10, a focusing top cover 40, a guide rail 20, a slide 30 and a focusing screw 50. The guide rail 20 is fixedly connected to the lens cup 10. The focusing top cover 40 is installed on the lens cup 10 and is provided with a through hole 41 that is clearance-matched with the guide rail 20. The slide 30 is slidably installed on the guide rail 20 and is used to install the imaging assembly 300. The focusing screw 50 is rotatably installed on the top cover and is screwed to the slide 30 to drive the slide 30 to slide along the guide rail 20, thereby driving the imaging assembly 300 to move along the guide rail 20, thereby adjusting the distance between the imaging assembly 300 and the lens assembly 400, that is, realizing the adjustment of the diopter. During assembly, first fix the guide rail 20 to the lens cup 10, then put the slide 30 on the guide rail 20, then pass the guide rail 20 through the through hole 41 of the focusing cover 40 and fix the focusing cover 40 to the lens cup 10, and finally insert the focusing screw 50 from the first assembly hole 11 and cooperate with the threaded through hole 31 of the slide 30. It can be understood that the focusing screw 50 can also be pre-assembled with the focusing cover 40, and the focusing screw 50 is simultaneously screwed into the threaded through hole 31 when installing the focusing cover 40. By fixing the guide rail 20 on the lens cup 10 with higher stability, the sliding stability of the slide 30 is increased, and the clearance fit between the through hole 41 on the focusing cover 40 and the guide rail 20 also avoids the influence of the assembly error when the focusing cover 40 and the lens cup 10 are assembled on the guide rail 20. It can be understood that if the two ends of the guide rail 20 are respectively fixed to the focusing cover 40 and the lens cup 10, that is, when over-positioned, the assembly error between the focusing cover 40 and the lens cup 10 can easily cause the guide rail 20 to be misaligned, thereby causing the adverse consequence of the slide 30 tilting. The above-mentioned technical solution provided in the present application can circumvent this technical problem.

[0053] It is worth noting that in this application, the alignment of the imaging component 300, i.e., AA adjustment, is completed within the structure of the slide 30, so there is no need to adjust the upper cover. The position deviation of the focusing screw 50 is smaller than that of the solution for AA adjustment with the help of the focusing upper cover 40, so the reserved space required to avoid interference is also smaller, which is conducive to improving the internal space utilization of the AR optical machine module. Specifically, the positioning of the optical components (imaging component 300, lens component 400) involved in this application is all referenced to the lens cup 10, and the optical components are also directly or indirectly installed on the lens cup 10, and have nothing to do with the focusing upper cover 40. The function of the focusing upper cover 40 includes carrying the focusing screw 50 and limiting the sliding range of the slide 30, and will not affect the alignment adjustment, i.e., the AA adjustment process.

[0054] See also Figure 3 and Figure 4 , Figure 4 for Figure 3 A partial enlarged view at the X in the middle. Optionally, in order to further reduce the impact of assembly errors on diopter adjustment, thereby achieving the effect of improving adjustment accuracy, the slide 30 is provided with a threaded through hole 31 that is threadedly mated with the focusing screw 50. The major diameter d1 of the threaded portion of the focusing screw 50 is greater than the minor diameter d2 of the threaded through hole 31 and smaller than the major diameter d3 of the threaded through hole. Specifically, the difference between the major diameter d1 of the focusing screw 50 and the major diameter d3 of the threaded through hole 31 is in the range of 0.1mm to 0.15mm. In this way, the focusing screw 50 is prevented from slipping out of the threaded through hole 31, and it is ensured that the slide 30 is only subjected to the axial force applied by the focusing screw 50. The assembly error caused by the tilt or radial deviation of the focusing screw 50 due to its own installation will not be further transmitted to the slide 30, thereby ensuring the smoothness of the sliding of the slide 30, which is conducive to improving the focusing accuracy of the AR optical machine module.

[0055] See also Figure 2 、 Figure 5 and Figure 6 , Figure 5 for Figure 2 The structural diagram of the middle mirror cup 10, Figure 6 for Figure 2Schematic diagram of the structure of the middle focus cover 40. Optionally, in one embodiment provided in the present application, the focus cover 40 is provided with a screw through hole 44, and the focus assembly further includes a fastening screw 60, which is passed through the screw through hole 44 and screwed to the lens cup 10. It can be understood that the lens cup 10 is provided with a mounting hole 13 that precisely matches the fastening screw 60. In order to further facilitate the assembly of the focus screw 50 and the threaded through hole 31, the aperture d4 of the screw through hole 44 is larger than the major diameter d5 of the fastening screw 60 (not shown in the figure, it can be understood as the maximum outer diameter of the threaded section of the fastening screw 60), and the difference between the aperture d4 of the screw through hole 44 and the major diameter d5 of the fastening screw 60 is greater than or equal to 0.1mm and less than or equal to 0.15mm. In this way, when installing the focus cover 40, the assembler can also repeatedly debug the installation position of the focus screw 50, thereby ensuring that the focus screw 50 is smoothly assembled with the threaded through hole 31. For example, the fastening screw 60 is an M1.4 screw, and the diameter of the screw through hole 44 is in the range of 1.5 mm to 1.55 mm.

[0056] See also Figure 2 Specifically, in one embodiment provided in the present application, the number of guide rails 20 is at least two to prevent the slide 30 from rotating, and at least two guide rails 20 are respectively arranged on both sides of the focusing screw 50 to balance the driving force applied by the focusing screw 50 to the slide 30, thereby improving the smoothness of the sliding of the slide 30. Furthermore, the number of guide rails 20 is at least three and they are arranged at intervals around the threaded through hole 31. In this way, the tilt of the slide 30 caused by the eccentric force of the focusing screw 50 on the slide 30 can be minimized as much as possible, thereby improving the accuracy of diopter adjustment.

[0057] See also Figure 2 and Figure 5 Optionally, in one embodiment provided herein, the diameter of the guide rail 20 ranges from 11.99 mm to 12 mm, and the eyeglass cup 10 defines a first assembly hole 11 that provides an interference fit with the guide rail 20. The diameter of the first assembly hole 11 ranges from 11.98 mm to 11.995 mm. The interference fit between the guide rail 20 and the eyeglass cup 10 facilitates assembly, and within this range, the tightness between the guide rail 20 and the eyeglass cup 10 is ensured without damaging either the guide rail 20 or the eyeglass cup 10.

[0058] For further information, see Figure 2 、 Figure 5 and Figure 6 Optionally, in this embodiment provided herein, the aperture of the through hole 41 ranges from 1.4 mm to 1.45 mm. Within this range, any errors in the assembly of the focusing cover 40 and the lens cup 10 will not affect the guide rail 20. At the same time, the alignment of the through hole 41 and the guide rail 20 facilitates quick positioning of the focusing cover 40 to the preset position of the lens cup 10 during assembly.

[0059] Optional, see Figure 3 and Figure 7 , Figure 7 for Figure 2 A structural diagram of the middle slide 30. In one embodiment provided in the present application, the slide 30 is provided with a sliding hole 32 that is clearance-matched with the guide rail 20. The aperture range of the sliding hole 32 is 11.975 mm to 12.005 mm. Lubricating the guide rail 20 with grease can ensure the smooth sliding of the slide 30.

[0060] See also Figure 3 and Figure 5 Optionally, in one embodiment provided herein, the lens cup 10 further defines a limiting hole 12 that is clearance-matched with the end of the focusing screw 50. Thus, the limiting hole 12 limits the end of the focusing screw 50, thereby reducing the shaking of the focusing screw 50 during rotation and preventing the slide 30 and guide rail 20 from being squeezed in the radial direction, thereby improving the adjustment accuracy of the AR module.

[0061] See also Figure 8 , Figure 8 for Figure 2 Schematic diagram of the structure of the focusing screw 50. Optionally, in one embodiment provided herein, the focusing cover 40 defines a second assembly hole 42. The focusing screw 50 includes a mounting portion 51, a screw portion 52 extending from opposite ends of the mounting portion 51 in mutually diverging directions, and an interface portion 53. The mounting portion 51 is rotatably mounted in the second assembly hole 42, and the screw portion 52 is clearance-fitted with the threaded through-hole 31 of the slide 30. The focusing screw 50 also includes an interface portion 53 extending axially away from the screw portion 52 from the mounting portion 51, and the interface portion 53 defines a cross slot. In this manner, the focusing screw 50 can be pre-assembled with the focusing cover 40, facilitating subsequent assembly.

[0062] See also Figure 3 and Figure 8Optionally, in one embodiment provided herein, the mounting portion 51 includes a carrier 511 having an annular engaging groove and a sealing ring 512 engaged with the engaging groove. The sealing ring 512 is engaged with the inner wall of the second assembly hole 42. It is understood that the focusing screw 50 is interference-fitted with the focusing cover 40 through the sealing ring 512, thereby simultaneously achieving the function of rotating the focusing screw 50 and sealing the second assembly hole 42. During the adjustment process, the focusing screw 50 can be stopped and positioned at any time, and external dust can also be prevented from entering, which is beneficial for maintaining the airtightness of the internal space of the AR optical machine module. Furthermore, the outer diameter of the interface portion 53 is larger than the aperture of the second assembly hole 42 and is used to abut the focusing cover 40. In this way, the interface portion 53 can block the second assembly hole 42, thereby blocking external dust. The abutment between the interface portion 53 and the focusing cover 40 can position the focusing screw 50, ensuring that during the adjustment process, the focusing screw 50 does not move axially toward the lens cup 10, thereby improving focusing accuracy. Specifically, a stop ring 531 is provided at one end of the interface portion 53 proximal to the mounting portion 51, and the adjustable cover is provided with a support platform 43 positioned in the second assembly hole 42 and abutting against the stop ring 531. This also extends the axial length of the second assembly hole 42, reducing the wobble of the focus screw 50. It will be appreciated that in other embodiments, to enable rotation of the focus screw 50, the sealing ring 512 may also be a precision bearing, with the inner ring of the bearing sleeved on the carrier 511 and the outer ring fixedly connected to the focus cover 40.

[0063] Please refer again Figure 3 and Figure 8 Optionally, in order to prevent the external thread of the screw portion 52 from scratching the focusing cover 40, in this embodiment provided in the present application, the screw portion 52 includes a smooth section 521 close to the mounting portion 51 and a threaded section 522 extending from the smooth section 521 away from the mounting portion 51, and the focusing screw 50 also includes an open retaining ring 54 sleeved on the smooth section 521. It can be understood that in this embodiment, the focusing screw 50 and the focusing cover 40 are pre-assembled. After the mounting portion 51 and the focusing cover 40 are fixed, the open retaining ring 54 is sleeved on the smooth section 521 of the focusing screw 50. When the focusing cover 40 is installed on the lens cup 10, the focusing screw 50 is simultaneously screwed into the threaded through hole 31 of the slide 30.

[0064] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0065] The above-described embodiments merely represent 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 various modifications and improvements without departing from the concept of the present invention, and these modifications 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. Focusing component, used for AR optical machine module, characterized in that: include: Mirror cup; A guide rail, the guide rail being fixedly connected to the mirror cup; A focusing upper cover, which is mounted on the lens cup and is provided with a through hole that is gap-matched with the guide rail; a slide, the slide being slidably mounted on the guide rail and being used to mount the imaging component of the AR optical machine module; and A focusing screw is rotatably mounted on the focusing upper cover and is screwed to the slide to drive the imaging assembly to move along the guide rail.

2. The focusing assembly according to claim 1, wherein: The slide is provided with a threaded through hole that is threadably matched with the focusing screw. The major diameter of the threaded portion of the focusing screw is larger than the minor diameter of the threaded through hole and smaller than the major diameter of the threaded through hole.

3. The focusing assembly according to claim 1, wherein: The focusing upper cover is provided with a screw through hole, and the focusing assembly further comprises a fastening screw, which is passed through the screw through hole and screwed to the lens cup; The hole diameter of the screw through hole is larger than the major diameter of the fastening screw, and the difference between the hole diameter of the screw through hole and the major diameter of the fastening screw is greater than or equal to 0.1 mm and less than or equal to 0.15 mm.

4. The focusing assembly according to claim 1, wherein: The diameter range of the guide rail is greater than or equal to 11.99 mm and less than or equal to 12 mm. The mirror cup is provided with a first assembly hole that is interference fit with the guide rail. The aperture range of the first assembly hole is greater than or equal to 11.98 mm and less than or equal to 11.995 mm.

5. The focusing assembly according to claim 2, wherein: The aperture range of the via hole is greater than or equal to 1.4 mm and less than or equal to 1.45 mm.

6. The focusing assembly according to claim 2, wherein: The slide frame is provided with a slide hole which is clearance-matched with the guide rail, and the aperture range of the slide hole is greater than or equal to 11.975 mm and less than or equal to 12.005 mm.

7. The focusing assembly according to claim 1, wherein: There are at least two guide rails, and at least two guide rails are arranged in parallel on both sides of the focusing screw.

8. The focusing assembly according to any one of claims 1 to 7, characterized in that: The focusing upper cover is provided with a second assembly hole, and the focusing screw comprises a mounting portion rotatably mounted in the second assembly hole, a screw portion extending from the mounting portion toward the lens cup, and an interface portion extending axially from the mounting portion away from the screw portion.

9. The focusing assembly according to claim 8, characterized in that: The mounting portion includes a supporting body with a clamping groove formed in an annular direction and a sealing ring clamped in the clamping groove. The sealing ring is annularly connected to the inner wall of the second assembly hole.

10. AR optical machine module, characterized in that: include: Optical machine bracket; The focusing assembly according to any one of claims 1 to 9, wherein the focusing assembly is mounted on the optical machine bracket; as well as An imaging assembly, the imaging assembly being mounted on a slide of the focusing assembly; as well as A lens assembly is mounted on the lens cup of the focusing assembly and is located in the optical path of the imaging assembly.

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