Projection device
By setting up three speakers in the projection device to form a 270° sound field layout, the problem of poor sound quality in micro-projection devices is solved, improving sound quality and enhancing user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- FORMOVIE (CHONGQING) INNOVATIVE TECH CO LTD
- Filing Date
- 2022-12-30
- Publication Date
- 2026-05-12
Smart Images
Figure CN115993752B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of projection equipment technology, and in particular to a projection device. Background Technology
[0002] A projection device is a device that can project video, images, or text onto a screen for display. It is widely used in homes, offices, schools, cinemas, and other places.
[0003] With technological advancements, mini projectors have gained popularity among consumers due to their small size and portability. However, current mini projectors suffer from poor sound quality and low volume, resulting in a subpar user experience. Summary of the Invention
[0004] Therefore, it is necessary to provide a projection device that addresses the problems of poor sound quality and low volume in current micro-projection devices.
[0005] This application provides a projection device, including a housing and an optical engine assembly, a first speaker, a second speaker, and a third speaker disposed within the housing. The housing includes a first sidewall and a second sidewall disposed opposite each other along a first direction, and a third sidewall and a fourth sidewall disposed opposite each other along a second direction. A first sound outlet is provided on the first sidewall, a second sound outlet is provided on the second sidewall, and a third sound outlet is provided on the third sidewall. The first direction and the second direction are perpendicular. The first speaker and the second speaker are respectively located on opposite sides of the optical engine assembly along the first direction. The first speaker is opposite to the first sound outlet, and the second speaker is opposite to the second sound outlet. The third speaker is located on the side of the optical engine assembly along the third direction closer to the third sound outlet; the third speaker is opposite to the third sound outlet.
[0006] In one embodiment, the optical engine assembly includes an optical engine body, an optical engine lens, and a heat sink;
[0007] The optical engine lens is disposed on the side of the optical engine body away from the third sidewall, and the optical engine lens is located between the first speaker and the second speaker;
[0008] The heat sink is disposed on the side of the optical engine body near the third sidewall, and the orthographic projection of the heat sink on the bottom wall of the housing coincides with at least a portion of the orthographic projection of the third speaker on the bottom wall of the housing.
[0009] In one embodiment, the first horn and the second horn are symmetrically arranged along the axis of the optical engine lens, which is parallel to the second direction.
[0010] In one embodiment, the radiator has a clearance notch on the side near the housing, and at least a portion of the third horn is disposed within the clearance notch.
[0011] In one embodiment, the heat sink includes a first fin group and a second fin group arranged along a third direction, the second fin group being located on the side of the first fin group near the bottom wall of the housing; the length of the first fin group along the second direction is greater than the length of the second fin group along the second direction, the first fin group and the second fin group forming the clearance notch; the third direction is perpendicular to the first direction and the second direction.
[0012] In one embodiment, a speaker enclosure is further provided inside the housing, the speaker enclosure comprising a first part, a second part, and a third part connected in sequence, the first part and the third part being located on both sides of the second part along the first direction; the first speaker is disposed in the first part of the speaker enclosure; the second speaker is disposed in the third part of the speaker enclosure;
[0013] Along the third direction, the height of the first part and the height of the third part are both greater than the height of the second part, so that the first part, the second part and the third part together form an assembly area, and at least a portion of the structure of the optical engine lens is located within the assembly area.
[0014] In one embodiment, the projection device further includes a passive radiator assembly disposed on the speaker housing.
[0015] In one embodiment, the passive basin assembly includes a first passive basin and a second passive basin, which are symmetrically disposed on both sides of the second portion along the second direction.
[0016] In one embodiment, the projection device further includes a buffer;
[0017] The inner wall of the housing is provided with a first assembly post, and the speaker shell is provided with a first assembly ring, which is sleeved on the first assembly post; the first assembly ring and the first assembly post are...
[0018] The buffer element is provided in the space;
[0019] The inner wall of the housing is provided with a second assembly post, and the outer shell of the third horn is provided with a second assembly ring, which is sleeved on the second assembly post; the buffer is provided between the second assembly ring and the second assembly post.
[0020] In one embodiment, the projection device further includes a fan assembly disposed within the housing and located on one side of the third speaker along the first direction;
[0021] 5 The air outlet of the fan assembly faces the radiator and the third horn. The outer casing of the third horn near the fan assembly is provided with an air guide surface, which is used to guide the cooling air blown by the fan assembly toward the third horn to the radiator.
[0022] The aforementioned projection device, by respectively arranging a first speaker and a second speaker on both sides of the optical engine assembly in a first direction, and arranging a third speaker on one side of the optical engine assembly in a second direction, and positioning the first speaker, second speaker, and third speaker opposite the first sound outlet, second sound outlet, and third sound outlet, respectively, thus...
[0023] Setting up a sound field layout with three speakers around the optical engine assembly not only amplifies the sound of the projection device but also creates a sound field layout where sound comes out from three different sides of the projection device simultaneously, improving the sound quality and thus enhancing the user experience. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is an exploded view of a portion of the projection device provided in one embodiment of this application;
[0026] Figure 2 for Figure 1 The top view of a portion of the projection device in its assembled state;
[0027] Figure 3 for Figure 1 The side view of a portion of the projection device in its assembled state;
[0028] Figure 4 for Figure 2 Schematic diagram of the AA section structure;
[0029] Figure 5 for Figure 2 Schematic diagram of the BB section structure;
[0030] Figure 6 for Figure 1 Assembly diagram of the middle housing, main speaker enclosure and third speaker;
[0031] Figure 7 for Figure 1 Assembly diagram of the middle shell, main speaker, third speaker and fan assembly;
[0032] Figure 8 for Figure 1 A schematic diagram of the main speaker enclosure;
[0033] Figure 9 for Figure 1 A schematic diagram of the structure of the third loudspeaker;
[0034] Figure 10 for Figure 6 and Figure 7 A schematic diagram of the middle buffer component.
[0035] Explanation of reference numerals in the attached figures:
[0036] 10-Projection device; 11-Housing; 111-First sidewall; 1111-First sound outlet; 112-Second sidewall; 1121-Second sound outlet; 113-Third sidewall; 1131-Third sound outlet; 114-Fourth sidewall; 12-Optical engine assembly; 121-Optical engine body; 122-Optical engine lens; 123-Heat sink; 123a-Avoidance notch; 1231-First fin group; 1232-Second fin group; 13-Main speaker; 131-Speaker housing; 1311-First part; 131 2-Second Part; 1313-Third Part; 1314-Assembly Area; 1315-First Assembly Ring; 1315a-First Notch; 132-First Horn; 133-Second Horn; 14-Third Horn; 141-Second Assembly Ring; 141a-Second Notch; 142-Air Guide Surface; 15-Passive Basin Assembly; 151-First Passive Basin; 152-Second Passive Basin; 16-Buffer; 161-Groove; 162-Concave-convex Surface; 17-Second Assembly Column; 18-Fan Assembly; 19-Optical Machine Bracket. Detailed Implementation
[0037] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0038] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0039] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0041] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0042] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening 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 possible implementation.
[0043] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, in this specification, the term “and / or” includes any and all combinations of the associated listed items.
[0044] Reference Figures 1-5 As shown, this application provides a projection device 10, which can be a micro projector.
[0045] Specifically, the projection device 10 includes a housing 11 and an optical engine assembly 12, a first speaker 132, a second speaker 133, and a third speaker 14 disposed within the housing 11. The housing 11 includes a first sidewall 111 and a second sidewall 112 disposed opposite each other along a first direction a, and a third sidewall 113 and a fourth sidewall 114 disposed opposite each other along a second direction b. The first sidewall 111 has a first sound outlet 1111, the second sidewall 112 has a second sound outlet 1121, and the third sidewall 113 has a third sound outlet 1131. The first direction a and the second direction b are perpendicular.
[0046] It should be noted that the housing 11 shown in the accompanying drawings is only a part of the housing 11 of the projection device 10. It is understood that the housing 11 of the projection device 10 also includes housings for forming the external surface. Furthermore, it is understood that the shape of the projection device 10 can be cylindrical or other shapes, and is not limited to the cuboid structure shown in the accompanying drawings. The first direction a can be the left-right direction of the projection device 10, and the second direction b can be the front-back direction of the projection device 10.
[0047] Furthermore, the first horn 132 and the second horn 133 are respectively located on both sides of the optomechanical assembly 12 along the first direction a. The first horn 132 is opposite to the first sound outlet 1111, and the second horn 133 is opposite to the second sound outlet 1121. The third horn 14 is located on the side of the optomechanical assembly 12 along the third direction c, closer to the third sound outlet 1131. The third horn 14 is opposite to the third sound outlet 1131.
[0048] Here, "the first speaker 132 is opposite to the first sound outlet 1111" means that at least a portion of the sound outlet of the first speaker 132 is opposite to the first sound outlet 1111, and there is no sound transmission barrier between them. The third direction c can be the height direction of the projection device 10. By setting the first sound outlet 1111, the second sound outlet 1121, and the third sound outlet 1131, on the one hand, the sound emitted by the first speaker 132, the second speaker 133, and the third speaker 14 can be transmitted quickly; on the other hand, it can ensure that the sound emitted by the first speaker 132, the second speaker 133, and the third speaker 14 can be transmitted from their respective external locations, ensuring that the sound field layout meets the design requirements.
[0049] The aforementioned projection device 10, by arranging a first speaker 132 and a second speaker 133 on both sides of the optical engine assembly 12 in the first direction a, and a third speaker 14 on one side of the optical engine assembly 12 in the second direction b, and arranging the first speaker 132, the second speaker 133, and the third speaker 14 opposite to the first sound outlet 1111, the second sound outlet 1121, and the third sound outlet 1131, respectively, not only amplifies the sound of the projection device 10, but also creates a sound field layout where sound is emitted simultaneously from three different sides (such as the left, right, and rear sides) of the projection device 10, thereby improving the sound quality and enhancing the user experience.
[0050] It should be noted that, in one example, the first speaker 132, the second speaker 133, and the third speaker 14 can be a separate structure, meaning that each of them forms a component and can be assembled individually. In another example, the first speaker 132, the second speaker 133, and the third speaker 14 can be a single unit, meaning they together form a single component and are assembled as a whole. In yet another example, two of the speakers in the first speaker 132, the second speaker 133, and the third speaker 14 form a single unit, while the third speaker is a separate unit. For example, the first speaker 132 and the second speaker 133 together form a single unit, i.e., the main speaker 13, while the third speaker 14 is a separate unit.
[0051] In one embodiment, reference Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the optical engine assembly 12 includes an optical engine body 121, an optical engine lens 122, and a heat sink 123. The optical engine lens 122 is disposed on the side of the optical engine body 121 opposite to the third sidewall 113, and is located between the first horn 132 and the second horn 133. The heat sink 123 is disposed on the side of the optical engine body 121 close to the third sidewall 113, and the orthographic projection of the heat sink 123 on the bottom wall of the housing 11 coincides with at least a portion of the orthographic projection of the third horn 14 on the bottom wall of the housing 11.
[0052] This allows for a more optimized arrangement of the optical engine assembly 12, the first speaker 132, the second speaker 133, and the third speaker 14, making full use of the overall space, improving the overall space utilization rate, and also contributing to improved sound quality.
[0053] In one embodiment, reference Figure 2 As shown, the first horn 132 and the second horn 133 are symmetrically arranged along the axis of the optical-mechanical lens 122, which is parallel to the second direction b. That is, the distance from the center of the first horn 132 to the axis of the optical-mechanical lens 122 is equal to the distance from the center of the second horn 133 to the axis of the optical-mechanical lens 122. Furthermore, the third horn 14 is located on the plane containing the axis of the optical-mechanical lens 122, i.e., along the first direction a. The distance between the third horn 14 and the first horn 132 is equal to the distance between the third horn 14 and the second horn 133, i.e., the distance between the third horn 14 and the first horn 132 in the first direction a is equal to the distance between the third horn 14 and the second horn 133 in the first direction a.
[0054] In this way, the first speaker 132, the second speaker 133, and the third speaker 14 form an isosceles triangle arrangement within the housing 11. Specifically, the lines connecting the centers of the first speaker 132, the second speaker 133, and the third speaker 14 form an isosceles triangle. Thus, the sound output directions of the three speakers are arranged at 270°, further optimizing the sound field layout for simultaneous sound output from three different sides of the projection device 10, thereby further improving sound quality and enhancing the user experience.
[0055] It is understood that the lines connecting the centers of the first speaker 132, the second speaker 133, and the third speaker 14 can also form a right triangle or other irregular triangular arrangement. The embodiments of this application will not be described in detail here.
[0056] In one embodiment, the heat sink 123 has a clearance notch 123a on the side near the housing 11, and at least a portion of the structure of the third speaker 14 is disposed within the clearance notch 123a. In this way, by providing the clearance notch 123a, a space for accommodating the third speaker 14 can be created within the narrow space of the housing 11, making it convenient to place the third speaker 14.
[0057] Specifically, the clearance notch 123a can be set at the corner of the radiator 123, so that the space inside the clearance notch 123a can be combined with the space outside the clearance notch 123a to form a larger accommodating space, which makes it easier to place the third speaker 14.
[0058] In one embodiment, the heat sink 123 includes a first fin group 1231 and a second fin group 1232 arranged along a third direction c. The second fin group 1232 is located on the side of the first fin group 1231 near the bottom wall of the housing 11. The length of the first fin group 1231 along the second direction b is greater than the length of the second fin group 1232 along the second direction b, and the first fin group 1231 and the second fin group 1232 form a clearance notch. The third direction c is perpendicular to the first direction a and the second direction b. In this way, it is equivalent to placing the third speaker 14 below the first fin group 1231. On the one hand, it can make full use of the space of the whole machine and improve the space utilization rate of the whole machine; on the other hand, it is beneficial to increase the volume of the third speaker 14, thereby improving the sound quality.
[0059] It is understood that the first fin group 1231 may include a plurality of spaced-apart first fins (not shown), and the second fin group 1232 may include a plurality of spaced-apart second fins (not shown).
[0060] In one embodiment, reference Figure 8 As shown, a speaker enclosure 131 is also provided inside the housing 11. The speaker enclosure 131 includes a first part 1311, a second part 1312, and a third part 1313 connected in sequence. The first part 1311 and the third part 1313 are located on both sides of the second part 1312 along the first direction a. A first speaker 132 is disposed in the first part 1311 of the speaker enclosure 131. A second speaker 133 is disposed in the third part 1313 of the speaker enclosure 131. Along the third direction c, the height of the first part 1311 and the height of the third part 1313 are both greater than the height of the second part 1312, so that the first part 1311, the second part 1312, and the third part 1313 together form an assembly area 1314, and at least a portion of the structure of the optical-mechanical lens 122 is located within the assembly area 1314.
[0061] It is understandable that the speaker housing 131 is the outer shell of the main speaker 13. By setting up the assembly area 1314, the light emitted by the optical engine lens 122 can be easily projected out of the projector from the fourth side wall 114 of the housing 11. In this way, without affecting the normal operation of the optical engine assembly 12, the optical engine lens 122 and the main speaker 13 are reasonably arranged, which improves the space utilization of the projection device 10, thereby improving the compactness of the internal structure of the projection device 10, which is conducive to the miniaturization of the projection device 10 and improves the user experience.
[0062] In one embodiment, reference Figure 7 As shown, the projection device 10 also includes a fan assembly 18, which is disposed within the housing 11 and located on one side of the third horn 14 along the first direction a. The fan assembly 18 is used to dissipate heat from the interior of the projection device 10. Specifically, the fan assembly 18 can be disposed on the inner side of the first sidewall 111. The air outlet of the fan assembly 18 faces the radiator 123 and the third horn 14. A guide surface 142 is provided on the housing of the third horn 14 near the fan assembly 18, which guides the cooling air blown by the fan assembly 18 toward the third horn 14 to the radiator 123. In this way, the cooling air blown by the fan assembly 18 can flow to the radiator 123 to the maximum extent, thereby improving the cooling efficiency of the fan assembly 18.
[0063] It is understandable that the air guide surface 142 can be flat or curved. Taking a flat air guide surface 142 as an example, the angle between the plane containing the air guide surface 142 and the orientation of the air outlet of the fan assembly 18 is not a right angle. Furthermore, the space between the end of the air guide surface 142 closest to the fan assembly 18 and the heat sink 123 is greater than the space between the end of the air guide surface 142 furthest from the fan assembly 18 and the heat sink 123. This allows for better air guiding effect of the air guide surface 142.
[0064] In one embodiment, reference Figure 8 As shown, the projection device 10 also includes a passive radiator assembly 15, which is disposed on the speaker housing 131. By disposing of the passive radiator assembly 15 on the speaker housing 131, the bass effect of the projection device 10 can be enhanced, and the impact of low-frequency energy vibration of the main speaker 13 on the jitter of the projected image can be reduced.
[0065] In one embodiment, the passive radiator assembly 15 includes a first passive radiator 151 and a second passive radiator 152, which are symmetrically arranged on both sides of the second portion 1312 along the second direction b. This allows the passive radiator assembly 15 to form a symmetrical front-to-back layout, maximizing the consistency of the front-to-back damping effect of the main speaker 13 and further reducing the impact of low-frequency energy vibrations of the main speaker 13 on the jitter of the projected image.
[0066] In one embodiment, reference Figure 6 , Figure 8 and Figure 9 As shown, the projection device 10 also includes a buffer 16. A first mounting post (not shown) is provided on the inner wall of the housing 11, and a first mounting ring 1315 is provided on the speaker housing 131, which is fitted onto the first mounting post. A buffer 16 is provided between the first mounting ring 1315 and the first mounting post. A second mounting post 17 is provided on the inner wall of the housing 11, and a second mounting ring 141 is provided on the outer shell of the third speaker 14, which is fitted onto the second mounting post 17. A buffer 16 is provided between the second mounting ring 141 and the second mounting post 17. For example, the buffer 16 can be made of silicone or other materials capable of providing cushioning.
[0067] Here, the first mounting post refers to the structure used to assemble the main speaker 13, and the second mounting post 17 refers to the structure used to assemble the third speaker 14. By setting the buffer 16, the vibration of the main speaker 13 and the third speaker 14 can be prevented from being transmitted to the housing 11, thus avoiding serious mechanical vibration, and the sound vibration can also be improved.
[0068] In one embodiment, reference Figure 10 As shown, the buffer 16 has a ring-shaped structure, allowing it to be fitted onto the first or second assembly post 17. A groove 161 is provided on the outer periphery of the ring-shaped structure, and the first assembly ring 1315 or the second assembly ring 141 is engaged within the groove 161. By providing the groove 161, the connection between the first assembly ring 1315 (or the second assembly ring 141) and the buffer 16 is secured, minimizing the risk of connection failure.
[0069] In one example, the groove 161 can be a continuous groove, that is, the groove 161 is an annular groove, which is arranged around the outer periphery of the buffer member 16. In another example, the groove 161 can be an intermittent groove, that is, multiple grooves 161 are provided on the outer periphery of the buffer member 16, and the multiple grooves 161 are spaced apart along the circumference of the buffer member 16.
[0070] In one embodiment, the inner wall surface of the annular structure is a concave-convex surface 162. It can be understood that the annular structure is sleeved on the first assembly post (or the second assembly post 17). By providing the concave-convex surface 162, the friction between the annular structure and the first assembly post (or the second assembly post 17) can be increased, thereby enhancing the assembly stability of the annular structure and the first assembly post (or the second assembly post 17).
[0071] In one embodiment, reference Figure 8 and Figure 9As shown, the first assembly ring 1315 has a first notch 1315a. The second assembly ring 141 has a second notch 141a. By providing the first notch 1315a and the second notch 141a, it is easy to fit the first assembly ring 1315 and the second assembly ring 141 onto the buffer member 16.
[0072] Understandably, referring to Figure 1 As shown, the projection device 10 also includes an optical engine bracket 19, which is mounted on the bottom wall of the housing 11, and the optical engine assembly 12 is mounted on the optical engine bracket 19. The optical engine bracket 19 is provided with ventilation holes so that the cooling air blown out of the air outlet of the fan assembly 18 is blown to the optical engine assembly 12 through the ventilation holes to dissipate heat from the optical engine assembly 12.
[0073] In the description of this specification, the references to terms such as "some embodiments," "other embodiments," "ideal embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.
[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features of the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0075] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A projection device, characterized in that, include: The housing includes a first sidewall and a second sidewall disposed opposite to each other along a first direction, and a third sidewall and a fourth sidewall disposed opposite to each other along a second direction; a first sound outlet is provided on the first sidewall, a second sound outlet is provided on the second sidewall, and a third sound outlet is provided on the third sidewall; the first direction and the second direction are perpendicular to each other; Optomechanical components are disposed within the housing; A first horn and a second horn are disposed within the housing and are located on opposite sides of the optomechanical assembly along the first direction, respectively; the first horn is opposite to the first sound outlet, and the second horn is opposite to the second sound outlet; A third speaker is disposed within the housing and located on the side of the optomechanical assembly closer to the third sound outlet along the second direction; the third speaker is opposite to the third sound outlet; The optical engine assembly includes an optical engine lens, which is located between the first horn and the second horn. The first horn and the second horn are symmetrically arranged along the axis of the optical engine lens, which is parallel to the second direction. The third horn is located on the plane containing the axis of the optical engine lens, and the distance between the third horn and the first horn along the first direction is equal to the distance between the third horn and the second horn.
2. The projection device according to claim 1, characterized in that, The optomechanical assembly includes an optomechanical main body and a heat sink; The optical engine lens is disposed on the side of the optical engine body away from the third sidewall; The heat sink is disposed on the side of the optical engine body near the third sidewall, and the orthographic projection of the heat sink on the bottom wall of the housing coincides with at least a portion of the orthographic projection of the third speaker on the bottom wall of the housing.
3. The projection device according to claim 2, characterized in that, The radiator has a clearance notch on the side near the housing, and at least a portion of the third horn is located within the clearance notch.
4. The projection device according to claim 3, characterized in that, The radiator includes a first fin group and a second fin group arranged along a third direction, the second fin group being located on the side of the first fin group near the bottom wall of the shell; the length of the first fin group along the second direction is greater than the length of the second fin group along the second direction, and the first fin group and the second fin group form the clearance notch; The third direction is perpendicular to the first direction and the second direction.
5. The projection device according to claim 4, characterized in that, The housing also includes a speaker enclosure, which comprises a first part, a second part, and a third part connected in sequence. The first part and the third part are located on opposite sides of the second part along the first direction. The first speaker is disposed in the first part of the speaker enclosure, and the second speaker is disposed in the third part of the speaker enclosure. Along the third direction, the height of the first part and the height of the third part are both greater than the height of the second part, so that the first part, the second part and the third part together form an assembly area, and at least a portion of the structure of the optical engine lens is located within the assembly area.
6. The projection device according to claim 5, characterized in that, The projection device also includes a passive radiator assembly, which is disposed on the speaker housing.
7. The projection device according to claim 6, characterized in that, The passive basin assembly includes a first passive basin and a second passive basin, which are symmetrically arranged on both sides of the second portion along the second direction.
8. The projection device according to claim 6, characterized in that, The projection device also includes a buffer component; The inner wall of the housing is provided with a first assembly post, and the speaker shell is provided with a first assembly ring, which is sleeved on the first assembly post; the buffer is provided between the first assembly ring and the first assembly post. The inner wall of the housing is provided with a second assembly post, and the outer shell of the third horn is provided with a second assembly ring, which is sleeved on the second assembly post; the buffer is provided between the second assembly ring and the second assembly post.
9. The projection device according to any one of claims 2-8, characterized in that, The projection device also includes a fan assembly, which is disposed inside the housing and located on one side of the third speaker along the first direction; The air outlet of the fan assembly faces the radiator and the third horn. The outer casing of the third horn near the fan assembly is provided with an air guide surface, which is used to guide the cooling air blown by the fan assembly toward the third horn to the radiator.