A micro projector

Abstract

The embodiment of the present invention relates to a micro projector, comprising a housing and an optical machine, a heat dissipation device, a fan, and a projection lens installed in the housing; the optical machine has a front side and a rear side opposite to the front side, and the projection lens is connected to the front side of the optical machine; the heat dissipation device is arranged on the front side of the optical machine and is located under the projection lens, and the heat dissipation device includes a radiator, and there is a gap between the radiator and the front side of the optical machine; the fan is arranged between the optical machine and the radiator, and the fan air inlet faces the optical machine, and the fan air outlet faces the radiator. The present invention has a compact structure, high space utilization, and good heat dissipation effect.

Description

Technical Field

[0001] The invention relates to the field of projectors, and in particular to a micro projector. Background Art

[0002] A projector is a device that can project videos, images or text onto a screen for display. It is widely used in places such as homes, offices, schools or cinemas.

[0003] Since the internal structure of the projector is complex and many components are sensitive to temperature, heat dissipation needs to be considered. With the development of technology, consumers have higher requirements for the small size and portability of projectors. The smaller the projector, the higher the heat dissipation requirements. Therefore, how to reduce the size and effectively dissipate heat is a technical problem that needs to be solved urgently for micro projectors. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a micro projector with compact structure, small volume and good heat dissipation effect.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a micro projector, comprising

[0006] A housing and an optical engine, a heat sink, a fan, and a projection lens installed in the housing;

[0007] The optical machine has a front side and a rear side opposite to the front side, and the projection lens is connected to the front side of the optical machine;

[0008] The heat dissipation device is arranged on the front side of the optical machine and is located at the lower side of the projection lens, and the heat dissipation device includes a radiator, and there is a gap between the radiator and the front side of the optical machine;

[0009] The fan is arranged between the optical engine and the heat sink, with the fan air inlet facing the optical engine and the fan air outlet facing the heat sink.

[0010] The beneficial effects of the present invention are as follows: the micro-projector provided by the present invention has a projection lens connected to the front side of the optical machine, and a heat dissipation device and a fan are installed on the lower side of the projection lens, which rationally utilizes the internal space of the shell, makes the structure compact, effectively improves the utilization rate of the internal space of the shell, and reduces the size of the projector; and the fan is installed between the radiator and the optical machine. During the operation of the micro-projector, the fan allows cooling air to pass through the optical machine and then enter the fan inlet, and flow from the fan outlet to the radiator, which can promptly take away the heat generated by the optical machine and has a good heat dissipation effect.

[0011] Based on the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, the heat dissipation device also includes a heat conductive substrate and at least two heat conductive pipes, one side of the heat conductive substrate is in close contact with the optical engine, the heat conductive substrate is connected to the heat sink through the heat conductive pipes, and the fan is located between the heat conductive substrate and the heat sink.

[0013] The beneficial effect of adopting the above-mentioned further scheme is that the thermally conductive substrate is in close contact with the optical machine, and the heat generated during the operation of the optical machine is transferred to the radiator through the thermally conductive substrate and the heat pipe. The air outlet of the fan is directed toward the radiator to take away the heat of the radiator, thereby achieving cooling. The thermally conductive pipe and the thermally conductive substrate have a compact structure and a good heat dissipation effect.

[0014] Furthermore, a mounting plate is arranged on the bottom side of the optical engine, a main board is arranged on the side of the mounting plate facing away from the optical engine, and a gap is provided between the mounting plate and the main board to form an air flow channel.

[0015] The beneficial effect of adopting the above further scheme is that the mainboard is used for overall centralized control of the present invention, and there is a gap between the mounting plate and the mainboard, which facilitates cooling of the mainboard when cooling air passes between the mounting plate and the mainboard, thereby improving the heat dissipation efficiency of the mainboard.

[0016] Furthermore, a support frame is provided on the front side of the optical machine, and the support frame has a heat dissipation channel running through the front and rear sides, and the heat dissipation channel is connected to the air flow channel, the radiator and the fan are installed in the heat dissipation channel, and a buffer sleeve is provided between the fan and the support frame.

[0017] The beneficial effect of adopting the above further scheme is that the radiator and the fan are installed in the channel, which is easy to install and has a compact structure; the buffer sleeve is used to reduce the vibration of the fan when it is working, thereby reducing the jitter of the projected image. At the same time, the buffer sleeve can protect the fan to prevent the fan from being damaged and affecting the cooling effect of the present invention.

[0018] Furthermore, the support frame includes a first bracket and a second bracket, the first bracket and the second bracket are connected to form the heat dissipation channel, and the inner sides of the first bracket and the second bracket are both provided with a slot for engaging the buffer sleeve.

[0019] The beneficial effect of adopting the above further scheme is that the first bracket and the second bracket are directly buckled or spliced ​​together, which is simple and intuitive as a whole and easy to install and disassemble; the card slot is used to snap-fit ​​and install the buffer sleeve to prevent the buffer sleeve from shifting.

[0020] Furthermore, a camera device is installed on the side of the radiator opposite to the fan, and a through hole corresponding to the camera device is provided on the shell.

[0021] The beneficial effect of adopting the above further solution is that the camera device senses the clarity of the projected image through the through hole on the front shell, and after transmitting the detection signal to the main board, it is beneficial for the main board to automatically control the focus.

[0022] Furthermore, the position of the camera device on the heat sink corresponds to the axis of the fan, and the size of the camera device is not larger than the size of the axis of the fan.

[0023] The beneficial effect of adopting the above-mentioned further scheme is that the camera device corresponds to the axis of the fan, and the size of the camera device is not larger than the size of the axis of the fan, ensuring that the axis will isolate the setting components from the hot air flow. The heat generated by the fan will not increase the temperature of the camera device, and will not block the heat dissipation airflow, thereby ensuring the heat dissipation efficiency.

[0024] Further, the optical machine has a top side surface and an inclined surface connecting the top side surface and the rear side surface of the optical machine;

[0025] The micro projector further comprises a sound box, the longitudinal section of which is roughly triangular, and the sound box is installed on the inclined surface of the optical machine, and one surface of the sound box is opposite to the inclined surface of the optical machine.

[0026] The beneficial effect of adopting the above further solution is that the inclined surface of the sound box corresponds to the inclined surface of the optical machine, which reduces the installation dimensions of the optical machine and the inclined surface and further improves the space utilization.

[0027] Furthermore, a voice board for receiving voice signals is installed on the top side of the optical machine, and a key board is installed on the voice board, and keys are arranged on the key board;

[0028] A button cover for pressing the button is also installed outside the shell.

[0029] The beneficial effect of adopting the above further solution is that the voice board is used to receive voice signals and transmit them to the main board for realizing voice control; the button is mainly a power button, which is used to turn on the device.

[0030] Furthermore, the shell includes a front shell and a rear shell, the front shell includes a front panel, a left panel, a right panel, a top panel and a bottom panel, the front panel of the front shell is provided with a window corresponding to the projection lens and an air outlet corresponding to the radiator, and the air outlet is located at the lower side of the projection lens, and the rear shell is provided with an air inlet.

[0031] The beneficial effect of adopting the above further solution is that the shell is formed by buckling the front shell and the rear shell, and the whole is simple and beautiful. The air inlet is used for cooling air intake, the air outlet is used for hot air blowing, and the window on the front panel of the front shell further protects the projection lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the explosion structure of a specific embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the exploded structure of a heat dissipation device according to a specific embodiment of the present invention;

[0035] Figure 4 It is a schematic diagram of the internal installation structure of a specific embodiment of the present invention.

[0036] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0037] 1. Optical machine; 2. Speaker; 3. Mounting plate; 4. Mainboard; 5. Radiator; 6. Fan; 7. Buffer sleeve; 8. First bracket; 9. Second bracket; 10. Power device; 11. Window; 12. Lens decoration; 13. Front shell decoration; 14. Front shell; 15. Voice bracket; 16. Voice board; 17. Keyboard; 18. Key; 19. Key cover; 20. Camera device; 21. Foot pad; 22. Back shell; 23. Shell; 24. Mainboard radiator; 25. Projection lens; 26. Focus ring; 27. Gear; 28. Thermal substrate; 29. ​​Heat pipe. DETAILED DESCRIPTION

[0038] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0039] In the description of the present invention, it is necessary to understand that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inside", "outside", "peripheral", "circumferential" and the like 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 referred system or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In the description of the present invention, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a micro projector provided by the present invention is a vertical micro projector, comprising a shell 23 and an optical machine 1, a heat dissipation device, a fan 6, and a projection lens 25 installed in the shell 23; the optical machine 1 has a front side and a rear side opposite to the front side, and the projection lens 25 is connected to the front side of the optical machine 1; the heat dissipation device is arranged on the front side of the optical machine 1 and is located at the lower side of the projection lens 25, the heat dissipation device includes a radiator 5, and there is a gap between the radiator 5 and the front side of the optical machine 1; the fan 6 is arranged between the optical machine 1 and the radiator 5, and the air inlet of the fan 6 faces the optical machine 1, and the air outlet of the fan 6 faces the radiator 5.

[0043] In the micro projector provided by the present invention, the projection lens 25 is connected to the front side of the optical machine 1, and the heat dissipation device and the fan 6 are installed on the lower side of the projection lens 25, so that the internal space of the shell 23 is reasonably utilized, the structure is compact, the utilization rate of the internal space of the shell 23 is effectively improved, and the volume of the projector is reduced; and the fan 6 is installed between the radiator 5 and the optical machine 1. During the operation of the micro projector, the fan 6 allows the cooling air to pass through the optical machine 1 and then enter the fan inlet, and flow from the fan outlet to the radiator, so as to promptly take away the heat generated by the optical machine 1, and the heat dissipation effect is good.

[0044] The optical machine 1 has a front side and a rear side opposite to the front side, and each side is mainly used to install accessories and auxiliary devices. Optical components such as a light source and a light modulator are installed in the internal cavity of the optical machine 1 to form a projection screen. Both the light source and the light modulator will generate heat during operation, which needs to be discharged in time to avoid affecting performance. In a specific embodiment, the light source is an LED light source and the light modulator is an LCD screen.

[0045] The projection lens 25 is connected to the front side of the optical machine 1. The projection lens 25 is used to project the projection image formed by the optical machine 1. In a specific embodiment, the projection lens 25 has an automatic focusing function. Specifically, a port is provided on the front side of the optical machine 1, and the projection lens 25 is connected to the port. A focus ring 26 for adjusting the focal length is installed outside the projection lens 25, and a rack is provided on the outer periphery of the focus ring 26. A power device 10 is installed on the optical machine 1. In order to further improve the focusing accuracy, the power device 10 can use a high-precision motor, such as a stepper motor or a servo motor. A gear 27 that meshes with the rack is installed at the output end of the power device 10, wherein the rotation of the power device 10 drives the focus ring 26 to rotate, and the rotation of the focus ring 26 drives the projection lens 25 to move axially, thereby realizing the focusing of the projection lens 25.

[0046] like Figure 2 , Figure 3 As shown, the housing 23 includes a front housing 14 and a rear housing 22. Both the front housing 14 and the rear housing 22 are integrally molded. The front housing 14 and the rear housing 22 can be connected by snap-fit ​​connection. In order to further improve the connection strength between the front housing 14 and the rear housing 22, bolts can be added between the front housing 14 and the rear housing 22. The front housing 14 includes a front panel, a left panel, a right panel, a top panel and a bottom panel. The front panel of the front housing 14 is provided with a window 11 corresponding to the projection lens 25 and an air outlet corresponding to the radiator 5, and the air outlet is located at the lower side of the projection lens 25. The rear housing 22 is provided with an air inlet. The window 11 is used to protect and support the projection lens 25 to prevent the projection lens 25 from being damaged. The window 11 is also provided with a lens decoration 12 and a front housing decoration 13, and the front housing decoration 13 can be bolted.

[0047] In order to enhance the friction force at the bottom of the shell 23 , foot pads 21 are further installed on the bottom sides of the front shell 14 and the rear shell 22 . The foot pads 21 are generally directly adhered to the groove at the bottom of the shell 23 using double-sided tape.

[0048] like Figure 2 , Figure 3 ,and Figure 4 As shown, the heat dissipation device is arranged on the front side of the optical machine 1 and is located at the lower side of the projection lens 25. The heat dissipation device specifically includes a heat sink 5. The heat sink 5 is made of metal with good thermal conductivity. In order to enhance the heat dissipation efficiency of the heat sink 5, the heat sink 5 can be processed into a plurality of parallel heat dissipation fins, and there are gaps between each heat dissipation fin for cooling air to flow. When the cooling air flows between each heat dissipation fin, the contact area between the cooling air and the heat dissipation fin is large, thereby improving the heat dissipation efficiency.

[0049] In some embodiments, the radiator 5 includes multiple layers of heat dissipation coils, each of which has a gap between them, and the gaps between two adjacent layers of heat dissipation coils are staggered. When the cooling air passes through the gaps between the heat dissipation coils, multiple loops are formed, thereby increasing the contact area between the heat dissipation coils and the cooling air, thereby improving the heat dissipation efficiency of the radiator 5.

[0050] The heat dissipation device also includes a heat-conducting substrate 28 and at least two heat-conducting pipes 29. One side of the heat-conducting substrate 28 is in close contact with the optical machine 1. Thermal grease can be applied between the heat-conducting substrate 28 and the optical machine 1. The heat-conducting pipe 29 is roughly U-shaped. One end of the heat-conducting pipe 29 is connected to the side of the heat-conducting substrate 28 away from the optical machine 1. The other end of the heat-conducting pipe 29 is inserted into the heat sink 5. The heat-conducting pipe 29 is used to provide a gap between the heat sink 5 and the front side of the optical machine 1. During the operation of the micro projector, the optical machine 1 transfers the heat generated to the heat-conducting pipe 29 through the heat-conducting substrate 28, and the heat-conducting pipe 29 then transfers the heat to the heat sink 5.

[0051] like Figure 2 , Figure 3 As shown, the fan 6 is disposed between the optical engine 1 and the radiator 5. In a specific embodiment, the fan 6 is installed at the interval between the radiator 5 and the front side of the optical engine 1. Furthermore, the fan 6 is located between the heat-conducting substrate 28 and the radiator 5. The fan 6 can be a turbo fan, which can increase the ventilation volume and improve the heat dissipation effect. The air inlet of the fan 6 faces the optical engine 1, and the air outlet of the fan 6 faces the radiator 5.

[0052] A support frame is provided on the front side of the optical machine 1, and the support frame is used to support the heat dissipation device and the fan 6. A positioning column is provided on the side of the optical machine 1 opposite to the support frame, and a positioning hole that cooperates with the positioning column is provided on the support frame, and the optical machine 1 and the support member can be locked by bolts. The support frame has a heat dissipation channel that runs through the front and back sides, and the two ends of the heat dissipation channel face the optical machine 1 and the front shell 14 respectively, and the heat dissipation channel is connected to the air flow channel, and the radiator 5 and the fan 6 are installed in the heat dissipation channel. A buffer sleeve 7 is provided between the fan 6 and the support frame. In order to enhance the buffering effect, the buffer sleeve 7 can be made of elastic materials such as silicone. There can be two buffer sleeves 7, and the two buffer sleeves 7 are respectively sleeved on the upper and lower sides of the fan 7. In order to facilitate the installation of the radiator 5 and the fan 6, the support frame includes a first bracket 8 and a second bracket 9, and the first bracket 8 and the second bracket 9 are connected together by buckling or splicing to form a heat dissipation channel, and bolt locking is added. The inner sides of the first bracket 8 and the second bracket 9 are both provided with a slot for engaging the buffer sleeve 7 , and the slot engages and fixes the buffer sleeve 7 to prevent displacement.

[0053] A camera device 20 is installed on the radiator 5 and on the back side opposite to the fan 6. The camera device 20 is used to sense the clarity of the projected image. The position of the camera device 20 on the radiator 5 corresponds to the axis of the fan 6, and the size of the camera device 20 is not greater than the size of the axis of the fan 6. In this embodiment, the camera device 20 mainly includes a camera and a camera mounting plate. A groove for mounting the camera mounting plate is provided on the radiator 5 and on the axis of the fan 6. The groove corresponds to the axis of the fan 6. The axis of the fan 6 is provided with a motor for driving the fan blades to rotate. By making the camera device 20 correspond to the axis of the fan 6, the airflow is blocked to a minimum. The camera mounting plate is arranged in the groove, and the camera is mounted on the camera mounting plate. The camera mounting plate can be fixed in the groove by bolt locking or welding. Preferably, the bottom of the groove is sealed, and the hot air flow will not pass through the groove, thereby avoiding the temperature rise of the camera and avoiding damage to the camera. The size of the camera device 20 is not larger than the size of the axial center of the fan 6, which reduces the obstruction to the heat dissipation airflow, thereby ensuring a high heat dissipation efficiency. A through hole corresponding to the camera device 20 is provided on the housing 23, and the camera device 20 shoots the projection screen through the through hole. Specifically, the through hole is located on the front housing 14.

[0054] A mounting plate 3 is provided on the bottom side of the optical machine 1, and a main board 4 is provided on the side of the mounting plate 3 facing away from the optical machine 1, and an air flow channel is formed by a gap between the mounting plate 3 and the main board 4. During the heat dissipation process, the cooling air passes through the air flow channel between the mounting plate 3 and the main board 4 to cool the main board 4. The main board 4 is used to control the projector as a whole. The main board 4 is provided with a variety of signal input interfaces, which mainly include headphone / speaker output, HDMI input, U disk insertion, DC power supply, etc., to further improve the versatility of the present invention.

[0055] In order to further enhance the heat dissipation of the optical machine 1, a second radiator is also arranged on the rear side of the optical machine 1; in order to further enhance the heat dissipation of the mainboard 4, a mainboard radiator 24 can also be installed on the mainboard 4, and thermal silicone grease is coated between the mainboard radiator 24 and the mainboard 4, and there is a gap between the mainboard radiator 24 and the mounting plate 3 so that cooling air can flow smoothly.

[0056] In the specific heat dissipation process, the cooling air flows from the air inlet of the rear shell 22 under the action of the fan 6 to the rear side of the optical machine 1, and cools the second radiator installed on the rear side of the optical machine 1. Then, the cooling air flows through the air flow channel between the mainboard radiator 24 and the mounting plate 3, and cools the mainboard 4 and the mainboard radiator 24. Then, under the action of the fan 6, the cooling air enters the air inlet of the fan 6 and flows to the radiator 5 through the air outlet. After cooling the radiator 5, the cooling air is discharged from the air outlet on the front shell 14. By optimizing the installation position of the fan 6 and the radiator 5, the cooling air passes through the set air duct, and the main components of the present invention are all cooled and cooled, with good heat dissipation effect, high space utilization, and compact structure.

[0057] The optical machine 1 has a top side surface and an inclined surface connecting the top side surface and the rear side surface of the optical machine 1. The micro projector also includes a speaker 2. The longitudinal section of the speaker 2 is roughly triangular. The speaker 2 is installed on the inclined surface of the optical machine 1, and one surface of the speaker 2 is opposite to the inclined surface of the optical machine 1. The sound outlet of the speaker 2 faces the rear shell 22, and the rear shell 22 is provided with a sound outlet hole. It can be understood that the air inlet hole on the rear shell 22 can also be used as a sound outlet hole, so as to achieve the effect of air intake and sound output at the same time. Preferably, the longitudinal section of the speaker 2 is roughly a right triangle, the inclined surface of the speaker 2 is opposite to the inclined surface of the optical machine 1, one surface of the speaker 2 is parallel to the top side surface of the optical machine 1, and the other surface of the speaker 2 is provided with at least one speaker outlet and faces the rear shell 22. This arrangement has a compact structure, high space utilization, and further reduces the volume.

[0058] One surface of the speaker 2 is opposite to the inclined surface of the optical machine 1. In the embodiment, a plurality of positioning posts or positioning slots are provided on the inclined surface of the optical machine 1. The ends of the positioning posts are provided with threads. Bolts matching the threads are provided on the speaker 2. The speaker 2 is installed on the inclined surface of the optical machine 1 through the threads and bolts. The installation is firm and the speaker 2 will not slip or loosen. The positioning slots can be used to further engage and limit the speaker 2.

[0059] A voice board 16 for receiving voice signals is installed on the top side of the optical machine 1, and the top side of the optical machine 1 is connected to the voice board 16 through a voice bracket 15. The voice board 16 transmits the received voice signal to the main board 4, and can realize automatic voice control. A key board 17 is installed on the voice board 16, and the key board 17 is installed in the middle of the voice board 16. A key 18 is set on the key board 17. The key 18 is generally a power button. A key cover 19 for pressing the key 18 is also installed outside the housing 23. The key cover 19 is fixed with the housing 23 by snapping. The micro projector is turned on and off by pressing the key 18.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A micro projector, characterized in that: include A housing (23) and an optical engine (1), a heat sink, a fan (6), and a projection lens (25) installed in the housing (23); The optical machine (1) has a front side and a rear side opposite to the front side, and the projection lens (25) is connected to the front side of the optical machine (1); The heat dissipation device is arranged on the front side of the optical machine (1) and is located below the projection lens (25), and the heat dissipation device comprises a heat sink (5), and a gap is provided between the heat sink (5) and the front side of the optical machine (1); The fan (6) is installed at the interval between the radiator (5) and the front side of the optical engine (1), and the air inlet of the fan (6) faces the optical engine (1), and the air outlet of the fan (6) faces the radiator (5).

2. The micro projector according to claim 1, characterized in that: The heat dissipation device further comprises a heat-conducting substrate (28) and at least two heat-conducting pipes (29); one side of the heat-conducting substrate (28) is in close contact with the optical machine (1); the heat-conducting substrate (28) is connected to the heat sink (5) via the heat-conducting pipe (29); and the fan (6) is located between the heat-conducting substrate (28) and the heat sink (5).

3. The micro projector according to claim 1, characterized in that: A mounting plate (3) is arranged on the bottom side of the optical engine (1), a main board (4) is arranged on the side of the mounting plate (3) facing away from the optical engine (1), and a gap is provided between the mounting plate (3) and the main board (4) to form an air flow channel.

4. The micro projector according to claim 3, characterized in that: A support frame is arranged on the front side of the optical machine (1), and the support frame has a heat dissipation channel that runs through the front and rear sides, and the heat dissipation channel is connected to the air flow channel. The radiator (5) and the fan (6) are installed in the heat dissipation channel, and a buffer sleeve (7) is arranged between the fan (6) and the support frame.

5. The micro projector according to claim 4, characterized in that: The support frame comprises a first bracket (8) and a second bracket (9), the first bracket (8) and the second bracket (9) are connected to form the heat dissipation channel, and the first bracket (8) and the second bracket (9) are both provided with a slot for engaging the buffer sleeve (7) on the inner side.

6. The micro projector according to any one of claims 1 to 5, characterized in that: A camera device (20) is installed on the side of the radiator (5) opposite to the fan (6), and a through hole corresponding to the camera device (20) is provided on the housing (23).

7. The micro projector according to claim 6, characterized in that: The position of the camera device (20) on the heat sink (5) corresponds to the axis of the fan (6), and the size of the camera device (20) is not larger than the size of the axis of the fan (6).

8. The micro projector according to claim 6, characterized in that: The optical machine (1) has a top side surface and an inclined surface connecting the top side surface and the rear side surface of the optical machine (1); The micro projector also includes a sound box (2), the longitudinal section of the sound box (2) is roughly triangular, the sound box (2) is installed on the inclined surface of the optical machine (1), and one surface of the sound box (2) is opposite to the inclined surface of the optical machine (1).

9. The micro projector according to claim 6, characterized in that: A voice board (16) for receiving voice signals is installed on the top side of the optical machine (1), a key board (17) is installed on the voice board (16), and keys (18) are arranged on the key board (17); A button cover (19) for pressing the button (18) is also installed outside the housing (23).

10. The micro projector according to claim 4, characterized in that: The housing (23) comprises a front housing (14) and a rear housing (22); the front housing (14) comprises a front panel, a left panel, a right panel, a top panel and a bottom panel; a window (11) corresponding to the projection lens (25) and an air outlet corresponding to the heat sink (5) are arranged on the front panel of the front housing (14); the air outlet is located at the lower side of the projection lens (25); and an air inlet is arranged on the rear housing (22).

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