CN219552816U

CN219552816U - Ray apparatus and AR glasses

Info

Publication number: CN219552816U
Application number: CN202321060467.6U
Authority: CN
Inventors: 王瑞; 关健; 游旭; 周兴
Original assignee: Meta Bounds Inc
Current assignee: Meta Bounds Inc
Priority date: 2023-05-05
Filing date: 2023-05-05
Publication date: 2023-08-18
Anticipated expiration: 2033-05-05

Abstract

The utility model is applicable to the field of augmented reality (Augmented Reality, AR), and discloses an optical machine and AR glasses. The light source component comprises a light emitting element, a main board and a heat radiation structure, wherein the light emitting element is electrically connected with the main board and controlled by the main board, and is used for emitting light beams under the control of the main board, and the direction of the light beams along the straight line propagation is defined as the optical axis direction. Along the optical axis direction, the heat dissipation structure and the light-emitting element are both arranged on one surface of the main board facing the optical machine main body. In the utility model, the radiating structure and the light-emitting element are arranged on the surface of the main board facing the optical engine main body in the optical axis direction, so that the distance between the radiating structure and the optical engine main body is shortened, the axial length of the optical engine is effectively shortened on the basis of ensuring the radiating function of the radiating structure, and the volume of the optical engine is reduced.

Description

Ray apparatus and AR glasses

Technical Field

The utility model relates to the technical field of augmented reality (Augmented Reality, AR), in particular to an optical machine and AR glasses.

Background

Augmented reality (Augmented Reality, AR) technology is a technology that smartly merges virtual information with the real world, and lightweight, foldable AR glasses are a new type of glasses to which the Augmented Reality (AR) technology is applied.

The light engine in AR glasses, such as DLP micro light engine, is usually provided with a heat dissipation structure to prevent the light source from being damaged due to too high temperature, or to prevent the color coordinate from being shifted due to the decrease of light efficiency. The axial length of ray apparatus can influence the design of AR glasses, and the long ray apparatus of axial length is difficult for placing in the picture frame of AR glasses, also can influence the miniaturized design of picture frame, hinge and mirror leg.

In the related art, the ray apparatus is usually provided with the heat radiation structure at the tail end of the ray apparatus, so that the volume of the ray apparatus is increased, the axial length of the ray apparatus is also increased, and the non-foldable part on the glasses leg needs to be designed longer, so that the volume of the folded AR glasses is increased, and the storage of the AR glasses is not facilitated.

Disclosure of Invention

The first objective of the present utility model is to provide a light machine, which is aimed at solving the technical problems of long axial length and large volume of the light machine in the related art.

In order to achieve the above purpose, the utility model provides the following scheme:

the light machine comprises a light machine main body and a light source assembly, wherein the light source assembly is arranged on the light machine main body, and the light machine main body is used for receiving and processing light beams when the light source assembly emits the light beams;

the light source assembly comprises a light emitting element, a main board and a heat dissipation structure, wherein the light emitting element is electrically connected with the main board and is used for emitting the light beam under the control of the main board, and the direction of the light beam along the straight line propagation is defined as the optical axis direction;

along the optical axis direction, the heat dissipation structure and the light emitting element are both arranged on one surface of the main board facing the optical machine main body.

In some embodiments, along the optical axis direction, the heat dissipation structure is provided with a containing portion for containing at least part of the light emitting element, and at least part of the light emitting element extends into the containing portion.

In some embodiments, the accommodating portion includes a first hole, the light emitting element penetrates through the first hole, and an inner peripheral surface of the first hole is attached to an outer peripheral surface of the light emitting element.

In some embodiments, an orthographic projection of the first aperture in the optical axis direction is square; and/or the number of the groups of groups,

at least two second open holes are arranged at intervals in the circumferential direction of the first open hole, and the second open holes are communicated with the first open hole.

In some embodiments, the heat dissipation structure is provided with a first positioning portion, a second positioning portion is disposed on a surface of the optical engine body facing the main board, and the first positioning portion and the second positioning portion are in plug-in fit, so that the heat dissipation structure is mounted on the optical engine body.

In some embodiments, the first positioning portion is a receptacle; and/or the number of the groups of groups,

the second positioning portion is a first protrusion extending in the optical axis direction.

In some embodiments, the heat dissipation structure includes a heat conducting portion, a surface of the heat conducting portion away from the optical engine main body covers a portion of the motherboard, and the first positioning portion is disposed on the heat conducting portion.

In some embodiments, the heat dissipation structure further includes a heat dissipation portion connected to an end of the heat conduction portion remote from the motherboard.

In some embodiments, the optical engine body has a receiving notch, and the heat dissipation portion is received in the receiving notch.

In some embodiments, the light engine further comprises a dust guard positioned between the light engine body and the heat dissipating structure.

In some embodiments, a second protrusion is disposed on a surface of the optical engine body facing the main board, and the main board is connected to the second protrusion.

The second objective of the present utility model is to provide an AR glasses, which includes a glasses main body, two legs and the optical machine, wherein the two legs are respectively disposed on two opposite sides of the glasses main body, and the optical machine is disposed on the glasses main body.

The optical machine provided by the utility model has the following beneficial effects: the light machine comprises a light machine main body and a light source assembly, wherein the light source assembly comprises a light emitting element, a main board and a heat radiation structure, the light emitting element emits light beams under the control of the main board, the light beams propagate along the direction of an optical axis and are received and processed by the light machine main body, and the heat radiation structure radiates heat of the light emitting element in the process. In the utility model, the radiating structure and the light-emitting element are arranged on the surface of the main board facing the optical engine main body in the optical axis direction, so that the distance between the radiating structure and the optical engine main body is shortened.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an exploded view of an optical engine according to an embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of a portion of FIG. 1 at a;

FIG. 3 is a partial cross-sectional view of an optical engine according to an embodiment of the present utility model taken along the optical axis;

FIG. 4 is a schematic diagram of a partial structure of an optical engine according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a light source assembly in an optical engine according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a heat dissipation structure in an optical machine according to an embodiment of the present utility model.

Reference numerals illustrate:

10. a light machine;

100. a light machine main body; 110. a second positioning portion; 111. a first protrusion; 120. a receiving notch; 130. the optical box body; 131. a mounting part; 1311. a first mounting groove; 1312. a second mounting groove; 1313. a fixing part; 140. a collimating lens; 150. a second protrusion; 151. a first perforation;

200. a light source assembly; 210. a light emitting element; 220. a main board; 221. a second perforation; 222. a flexible circuit board; 2221. a first plate body; 2222. a second plate body; 223. a reinforcing plate; 230. a heat dissipation structure; 231. a housing part; 2311. a first opening; 2312. a second opening; 232. a first positioning portion; 233. a heat conduction part; 2331. avoiding the notch; 234. a heat dissipation part; 2341. a heat dissipation plate; 2342. a heat sink; 2343. a heat dissipation space; 240. a carrying plate; 241. a third perforation;

300. a dust-proof member; 310. a third positioning portion; 400. a first screw; 500. and a second screw.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship between the components, the movement condition, etc. in a specific posture, and if the specific posture is changed, the directional indication is changed accordingly.

It will also be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or be indirectly connected to the other element through intervening elements.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In the related art, a heat dissipation structure is usually disposed at the end of the light machine to prevent the light source in the light machine from being too high in temperature, so as to solve the problem that the light source is damaged or the light efficiency is reduced to cause color coordinate shift due to the too high temperature of the light source. However, the heat dissipation structure in the optical machine in the related art is usually disposed at the rear end of the light source, such as the side of the main board facing away from the light source, which increases the axial length of the optical machine and the volume of the optical machine, so that the optical machine is not easy to be placed in the frame of the AR glasses, and the non-foldable portion on the glasses leg needs to be designed longer, thereby increasing the volume of the folded AR glasses, which is not beneficial to the storage of the AR glasses.

In view of this, as shown in fig. 1, the present utility model provides a light engine 10, in which the heat dissipation structure 230 and the light emitting element 210 are disposed on the side of the main board 220 facing the light engine main body 100, instead of being disposed on the back side of the light emitting element 210, so as to effectively shorten the axial length of the light engine 10, thereby reducing the volume of the light engine 10, and further facilitating the difficulty of placing the light engine 10 in the frame of the AR glasses (not labeled) when the light engine 10 is applied to the AR glasses (not labeled), and shortening the design length of the glasses legs, thereby reducing the volume of the AR glasses, and facilitating the storage and miniaturization design of the AR glasses.

Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without collision.

As shown in fig. 1, the optical engine 10 according to the embodiment of the present utility model includes an optical engine main body 100 and a light source assembly 200, wherein the light source assembly 200 is mounted on the optical engine main body 100, and the optical engine main body 100 is used for receiving and processing a light beam when the light source assembly 200 emits the light beam. Generally, the optical engine body 100 has an optical system (not shown) capable of receiving and processing the light beam, and the optical system can use the prior art. The light source assembly 200 includes a light emitting element 210, a main board 220, and a heat dissipation structure 230, where the light emitting element 210 may be an LED light source, the light emitting element 210 and the main board 220 are electrically connected and controlled by the main board 220, and the light emitting element 210 is configured to emit a light beam under the control of the main board 220, and define a direction of the light beam along a straight line to be an optical axis direction. Along the optical axis direction, the heat dissipation structure 230 and the light emitting element 210 are both disposed on a surface of the main board 220 facing the optical engine main body 100, and the heat dissipation structure 230 dissipates heat from the light emitting element 210 and the main board 220.

It can be understood that the light engine 10 of the present utility model includes an engine main body 100 and a light source assembly 200, wherein the light source assembly 200 includes a light emitting element 210, a main board 220 and a heat dissipation structure 230, the light emitting element 210 emits a light beam under the control of the main board 220, and then the light beam propagates along the optical axis direction, and is finally received and processed by the engine main body 100, and in this process, the heat dissipation structure 230 dissipates heat of the light emitting element 210. In the utility model, since the heat dissipation structure 230 and the light emitting element 210 are both arranged on the surface of the main board 220 facing the optical engine main body 100 in the optical axis direction, the distance between the heat dissipation structure 230 and the optical engine main body 100 is shortened, and compared with the scheme that the heat dissipation structure 230 is arranged on the back surface of the light emitting element 210 in the related art, the axial length of the optical engine 10 is effectively shortened and the volume of the optical engine 10 is reduced on the basis of ensuring the heat dissipation function of the heat dissipation structure 230.

As shown in fig. 1 and 5, as an embodiment, the heat dissipation structure 230 is provided with a receiving portion 231 along the optical axis direction, the receiving portion 231 is used for receiving at least part of the light emitting element 210, so as to provide a region for the light emitting element 210 to be placed thereon, and at least part of the light emitting element 210 extends into the receiving portion 231, so that part or all of the light emitting element 210 can be received in the receiving portion 231, so that the distance between the light emitting element 210 and the optical machine main body 100 is not increased along the optical axis direction, and the heat dissipation structure 230 can be enclosed on the periphery of the light emitting element 210, thereby improving the heat dissipation effect.

As shown in fig. 5 and 6, as an embodiment, the accommodating portion 231 includes a first opening 2311 capable of accommodating the outline of the light emitting element 210, and the light emitting element 210 is penetrated through the first opening 2311, so that the heat dissipating structure 230 can be enclosed around the light emitting element 210, and an inner peripheral surface of the first opening 2311 is attached to an outer peripheral surface of the light emitting element 210, so that when the light emitting element 210 is assembled with the heat dissipating structure 230, the light emitting element 210 can penetrate through the heat dissipating structure 230 along the optical axis direction, thereby reducing the axial length of the optical engine 10.

As shown in fig. 1, 5 and 6, as an embodiment, the orthographic projection of the first opening 2311 in the optical axis direction is square, for example, square or rectangular, and the first opening 2311 is designed as a square hole, which can limit the light emitting element 210 from being offset in the circumferential direction, thereby limiting the light emitting element 210, improving the assembly accuracy of the light emitting element 210, and enabling the heat dissipating structure 230 to use the first opening 2311 to position the light emitting element 210, independent of the patch accuracy between the light emitting element 210 and the main board 220. At least two second openings 2312 are provided at intervals in the circumferential direction of the first opening 2311, for example, in an embodiment in which the first opening 2311 is a square hole, the second openings 2312 are provided at four corners of the first opening 2311, and the second openings 2312 communicate with the first opening 2311 to facilitate the installation and removal of the light emitting element 210 into and from the square hole.

As shown in fig. 1, fig. 2, and fig. 4, and referring to fig. 5, as an embodiment, the heat dissipation structure 230 is provided with a first positioning portion 232, a second positioning portion 110 is provided on a surface of the optical engine main body 100 facing the motherboard 220, and the first positioning portion 232 and the second positioning portion 110 are in plug-in fit, so as to mount the heat dissipation structure 230 on the optical engine main body 100. In this way, when the heat dissipating structure 230 is assembled on the optical engine main body 100, the first positioning portion 232 and the second positioning portion 110 can be aligned and inserted to simplify the assembling operation of the heat dissipating structure 230 and the optical engine main body 100, and shorten the assembling time.

As shown in fig. 2 and 5, as an embodiment, the first positioning portion 232 is an insertion hole, the second positioning portion 110 is a first protrusion 111 extending along the optical axis direction, the first protrusion 111 may be columnar, and is conveniently penetrated by the insertion hole, and the second positioning portion 110 penetrates the first positioning portion 232, so as to simplify the connection between the first positioning portion 232 and the second positioning portion 110.

As shown in fig. 1, 3 and 5, as an embodiment, the heat dissipation structure 230 includes a heat conducting portion 233, and a surface of the heat conducting portion 233, which is far away from the optical engine main body 100, covers a part of the motherboard 220 to conduct heat from the motherboard 220 and the light emitting element 210. In the embodiment where the heat dissipation structure 230 includes the heat conducting portion 233, the heat dissipation structure 230 further includes the heat dissipating portion 234, the heat conducting portion 233 is configured to transfer heat on the motherboard 220 and the light emitting element 210 to the heat dissipating portion 234, the heat dissipating portion 234 is connected to an end of the heat conducting portion 233 away from the motherboard 220, and the heat dissipating portion 234 is configured to dissipate the heat transferred from the heat conducting portion 233. It should be understood that the heat dissipation structure 230 may have only a heat conduction function, but not a heat dissipation function, and of course, may have both a heat conduction function and a heat dissipation function. The first positioning portion 232 is disposed on the heat conducting portion 233, so as to mount the heat conducting portion 233 on the optical engine main body 100. The number of the first positioning portions 232 is two, the two first positioning portions 232 are staggered, the two first positioning portions 232 are symmetrical about the central axis of the accommodating portion 231, and the second positioning portions 110 are in one-to-one correspondence with the first positioning portions 232, so as to reduce the alignment difficulty of the first positioning portions 232 and the second positioning portions 110, and improve the assembly accuracy of the heat dissipation structure 230 assembled on the optical machine main body 100. In general, the heat dissipation structure 230 may be an aluminum heat sink to improve heat dissipation.

Referring to fig. 6, in one embodiment, the heat dissipation portion 234 includes a heat dissipation plate 2341, where the heat dissipation plate 2341 extends from the heat conduction portion 233 toward the optical engine main body 100, and the heat dissipation plate 2341 is used to dissipate heat conducted from the heat conduction portion 233. In the embodiment where the heat dissipating part 234 includes the heat dissipating plate 2341, the heat dissipating part 234 further includes at least two heat dissipating fins 2342 to enhance the heat dissipating effect, each heat dissipating fin 2342 extends from one side of the heat dissipating plate 2341 along the first direction, and a heat dissipating space 2343 is formed between two adjacent heat dissipating fins 2342. It should be appreciated that the heat sink 234 may not have the heat sink 2342. The heat conduction portion 233 is a heat conduction plate extending in a first direction from the other surface of the heat dissipation plate 2341, and the first direction is perpendicular to the optical axis direction.

As shown in fig. 1 and 3, as an embodiment, the top of the optical engine main body 100 has a receiving notch 120, and the heat dissipating part 234 is received in the receiving notch 120, so that the structural compactness can be improved and the axial length of the optical engine 10 can be shortened.

As shown in fig. 1, 2 and 3, as an embodiment, the optical engine 10 further includes a dust-proof member 300 disposed between the optical engine main body 100 and the heat dissipation structure 230, where the dust-proof member 300 has a dust-proof effect on the optical engine main body 100 and the heat dissipation structure 230, and the dust-proof member 300 may be a dust-proof pad. Illustratively, the dust-proof member 300 is provided with a third positioning portion 310 corresponding to the second positioning portion 110, and the third positioning portion 310 is penetrated by the second positioning portion 110, so that the dust-proof member 300 is assembled with the optical engine main body 100, and the heat dissipation structure 230 can be pressed on the dust-proof member 300 along the optical axis direction.

As shown in fig. 1, 2 and 6, as an embodiment, the optical bench body 100 includes an optical bench body 130 and a collimator lens 140, the collimator lens 140 is mounted on a surface of the optical bench body 130 facing the main board 220, and the collimator lens 140 is used for receiving and transmitting the light beam emitted by the light emitting element 210. In the optical axis direction, the center orthographic projection of the collimating lens 140 coincides with the center orthographic projection of the first opening 2311, so that the center of the collimating lens 140, the center of the first opening 2311 and the center of the light emitting element 210 can be on the same straight line, and when the light emitting element 210 is matched with the first opening 2311, accurate positioning is achieved with the optical box 130, so that the optical axis offset error can be reduced, and adverse phenomena such as color edges, dark angles and the like caused by off-axis of the light emitting element 210 are avoided.

Referring to fig. 4, a surface of the optical machine housing 130 facing the light emitting element 210 is provided with a mounting portion 131, and the collimator lens 140 is mounted on the mounting portion 131. Illustratively, the mounting part 131 includes a first mounting groove 1311, two second mounting grooves 1312 and a fixing part 1313, the first mounting groove 1311 and the second mounting groove 1312 are communicated, the two second mounting grooves 1312 are disposed at intervals along the circumference of the first mounting groove 1311, and the two second mounting grooves 1312 are symmetrical about the central axis of the first mounting groove 1311, and the collimating lens 140 is mounted to the first mounting groove 1311 while fixing the outer circumference of the collimating lens 140 with the second mounting groove 1312 through the fixing part 1313 to improve the mounting stability of the collimating lens 140. The fixing portion 1313 may be a fixing adhesive formed by fixing the collimator lens 140 in the second mounting groove 1312 by dispensing using a dispensing fixing technique.

As shown in fig. 1, 4 and 5, as an embodiment, a surface of the optical engine main body 100 facing the main board 220 is provided with a second protrusion 150, and the main board 220 is connected to the optical engine main body 100 through the second protrusion 150. The second protrusion 150 is provided with a first through hole 151 through which the first screw 400 passes, and the second through hole 221 is disposed on the main board 220 corresponding to the position of the second protrusion 150, and the first screw 400 sequentially passes through the second through hole 221 and the first through hole 151 to fix the main board 220 on the second protrusion 150, so that the main board 220 is convenient to install and detach by using a screw locking mode. The heat conducting portion 233 is provided with a avoiding notch 2331 for avoiding the second protrusion 150, so that the second protrusion 150 can conveniently pass through the heat dissipating structure 230.

As shown in fig. 1 and 3, as an embodiment, the main board 220 includes a flexible circuit board 222 and a reinforcing plate 223, and the light emitting element 210 and the reinforcing plate 223 are respectively connected to two opposite sides of the flexible circuit board 222 along the optical axis direction, and the heat dissipation structure 230 is disposed on a surface of the flexible circuit board 222 facing the optical engine main body 100. The flexible circuit board 222 is electrically connected to the light emitting element 210 and serves to control the light emitting element 210, and the reinforcing plate 223 plays a role of reinforcing the strength of the flexible circuit board 222 to facilitate the assembly of the flexible circuit board 222.

As shown in fig. 1, 3 and 5, as an embodiment, the flexible circuit board 222 includes a first board 2221 and a second board 2222, the first board 2221 is disposed at the bottom of the optical engine main body 100, the second board 2222 is connected to an end of the first board 2221 away from the optical engine main body 100, and the light emitting element 210 and the heat dissipation structure 230 are both disposed on the second board 2222. The second board 2222 is electrically connected to the optical engine main body 100 through the first board 2221, so as to at least obtain electric power from the optical engine main body 100 to supply the light emitting element 210. The light source assembly 200 further includes a carrier plate 240, where the carrier plate 240 is connected to a surface of the first plate body 2221 opposite to the optical engine main body 100, and at least a portion of the carrier plate is covered by the first plate body 2221, and the carrier plate 240 is used for carrying and supporting the first plate body 2221, so as to improve the assembly stability of the flexible circuit board 222, thereby improving the structural stability of the light source assembly 200. The carrier plate 240 is provided with a third through hole 241 through which the second screw 500 passes, and a fourth through hole (not labeled) is correspondingly provided on the bottom surface of the optical engine main body 100, and the second screw 500 sequentially passes through the third through hole 241 and the fourth through hole to fix the carrier plate 240 on the optical engine main body 100. The bearing plate 240 is conveniently assembled and disassembled by using a screw locking mode.

Based on the optical bench 10, the embodiment of the utility model further provides an AR glasses, which includes a glasses main body (not labeled), two glasses legs (not labeled) and the optical bench 10, wherein the two glasses legs are respectively disposed on two opposite sides of the glasses main body, and the optical bench 10 is disposed on the glasses main body. It can be appreciated that, because the AR glasses use the optical machine 10 described above, the difficulty of placing the optical machine 10 in the glasses main body of the AR glasses is reduced, and because the optical machine 10 shortens the axial length and reduces the volume, the design length of the glasses leg can be shortened, thereby reducing the volume of the AR glasses, and being beneficial to the storage and miniaturization design of the AR glasses.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. The light source assembly is arranged on the light machine main body, and the light machine main body is used for receiving and processing light beams when the light source assembly emits the light beams;

2. The bare engine according to claim 1, wherein the heat dissipation structure is provided with a receiving portion for receiving at least part of the light emitting element along the optical axis direction, and at least part of the light emitting element extends into the receiving portion.

3. The light engine of claim 2, wherein the receiving portion includes a first opening, the light emitting element is disposed through the first opening, and an inner peripheral surface of the first opening is attached to an outer peripheral surface of the light emitting element.

4. A light engine as claimed in claim 3, characterized in that the orthographic projection of the first opening in the direction of the optical axis is square; and/or the number of the groups of groups,

5. The optical bench according to any of claims 1-4, wherein the heat dissipation structure is provided with a first positioning portion, a second positioning portion is disposed on a surface of the optical bench body facing the main board, and the first positioning portion and the second positioning portion are in plug-in fit to mount the heat dissipation structure on the optical bench body.

6. The optical bench of claim 5 wherein said first positioning portion is a socket; and/or the number of the groups of groups,

7. The bare engine according to claim 5, wherein the heat dissipation structure comprises a heat conducting portion, a surface of the heat conducting portion away from the bare engine body covers a portion of the main board, and the first positioning portion is disposed on the heat conducting portion.

8. The bare engine according to claim 7, wherein the heat dissipation structure further comprises a heat dissipation portion connected to an end of the heat conduction portion away from the motherboard.

9. The optical bench of claim 8, wherein the optical bench body has a receiving notch, and the heat dissipation portion is received in the receiving notch.

10. The bare engine of claim 5 further comprising a dust guard positioned between the bare engine body and the heat dissipating structure.

11. The optical bench according to any of claims 1-4, wherein a second protrusion is disposed on a surface of the main body of the optical bench facing the main board, and the main board is connected to the second protrusion.

12. An AR glasses, comprising a glasses body, two glasses legs and a light machine according to any one of claims 1-11, wherein the two glasses legs are respectively arranged on two opposite sides of the glasses body, and the light machine is arranged on the glasses body.