CN215867490U - Miniature projector - Google Patents

Abstract

The embodiment of the utility model relates to a micro projector, which comprises a shell, and an optical machine, a heat dissipation device, a fan and a projection lens which are arranged in the shell; the optical machine is provided with a front side surface and a rear side surface opposite to the front side surface, and the projection lens is connected to the front side surface of the optical machine; the heat dissipation device is arranged on the front side surface of the optical machine and is positioned on the lower side of the projection lens, the heat dissipation device comprises a radiator, and a gap is formed between the radiator and the front side surface of the optical machine; the fan set up in between the ray apparatus and the radiator, just fan air intake orientation the ray apparatus, fan air outlet orientation the radiator. The utility model has compact structure, high space utilization rate and good heat dissipation effect.

Description

Miniature projector

Technical Field

The utility model relates to the field of projectors, in particular to a miniature projector.

Background

A projector is a device that can project videos, images, or characters onto a screen for display, and is widely used in places such as homes, offices, schools, or movie theaters.

Since the internal structure of the projector is complicated and many components are sensitive to temperature, heat dissipation needs to be considered. With the development of technology, consumers have made higher demands on the small size and portability of projectors. The smaller the projector size, the higher the heat dissipation requirements. Therefore, how to reduce the volume and effectively dissipate heat is a technical problem that needs to be solved urgently in the current micro projector.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a miniature projector which is compact in structure, small in size and good in heat dissipation effect.

The technical scheme for solving the technical problems is as follows: a miniature projector comprises a shell, and an optical machine, a heat dissipation device, a fan and a projection lens which are arranged in the shell;

the optical machine is provided with a front side surface and a rear side surface opposite to the front side surface, and the projection lens is connected to the front side surface of the optical machine;

the heat dissipation device is arranged on the front side surface of the optical machine and is positioned on the lower side of the projection lens, the heat dissipation device comprises a radiator, and a gap is formed between the radiator and the front side surface of the optical machine;

the fan set up in between the ray apparatus and the radiator, just fan air intake orientation the ray apparatus, fan air outlet orientation the radiator.

The utility model has the beneficial effects that: according to the micro projector provided by the utility model, the projection lens is connected to the front side surface of the optical machine, and the heat dissipation device and the fan are arranged on the lower side of the projection lens, so that the internal space of the shell is reasonably utilized, the structure is compact, the utilization rate of the internal space of the shell is effectively improved, and the volume of the projector is reduced; and the fan is installed between radiator and ray apparatus, and in the course of the work of miniature projector, the fan makes the cooling air pass through the ray apparatus and then gets into fan air intake, flows to the radiator from the fan air outlet, can in time take away the heat that the ray apparatus produced, and the radiating effect is good.

On the basis of the technical scheme, the utility model can be further improved as follows.

Furthermore, the heat dissipation device further comprises a heat conduction substrate and at least two heat conduction pipes, one side face of the heat conduction substrate is tightly attached to the optical machine, the heat conduction substrate is connected with the radiator through the heat conduction pipes, and the fan is located between the heat conduction substrate and the radiator.

The beneficial effect who adopts above-mentioned further scheme is that heat conduction base plate and ray apparatus are hugged closely, and the heat that produces in the ray apparatus working process passes through heat conduction base plate, heat pipe transmission to radiator, and the air outlet of fan takes away the heat of radiator towards the radiator to realize the cooling, heat pipe and heat conduction base plate compact structure, the radiating effect is good.

Further, be provided with the mounting panel on the bottom side of ray apparatus, the mounting panel deviates from one side of ray apparatus is provided with the mainboard, the mounting panel with interval in order to form airflow channel between the mainboard.

The main board is used for carrying out overall centralized control on the air conditioner, and the gap is formed between the mounting board and the main board, so that cooling air can conveniently cool the main board when passing through the gap between the mounting board and the main board, and the heat dissipation efficiency of the main board is improved.

Further, a support frame is arranged on the front side face of the optical machine, the support frame is provided with a heat dissipation flow channel penetrating through the front side face and the rear side face, the heat dissipation flow channel is communicated with the air flow channel, the radiator and the fan are installed in the heat dissipation flow channel, and a buffer sleeve is arranged between the fan and the support frame.

The further scheme has the advantages that the radiator and the fan are arranged in the channel, so that the installation is convenient, and the structure is compact; the buffer sleeve is used for reducing the vibration of the fan during working so as to reduce the jitter of a projected picture, and meanwhile, the buffer sleeve can protect the fan and prevent the fan from being damaged so as to influence the cooling effect of the utility model.

Further, the support frame includes first support and second support, first support with the second support is connected and is formed the heat dissipation runner, first support with the second support inboard all is provided with and is used for the block draw-in groove of cushion collar.

The first support and the second support are directly buckled or spliced to form the structure, so that the whole structure is simple and visual, and the installation and the disassembly are convenient; the draw-in groove is used for installing the buffer sleeve block, prevents that the buffer sleeve from appearing shifting.

Further, a camera device is installed on the radiator and on the side opposite to the fan, and a through hole corresponding to the camera device is formed in the shell.

The beneficial effect who adopts above-mentioned further scheme is that camera device passes through the through-hole perception on the preceding shell and throws the picture definition, with behind the detected signal transmission to the mainboard, does benefit to mainboard automatic control focusing.

Furthermore, the position of the camera device on the radiator corresponds to the axial center part of the fan, and the size of the camera device is not larger than that of the axial center part of the fan.

The beneficial effect of adopting the above further scheme is that the camera device corresponds to the shaft center part of the fan, and the size of the camera device is not larger than that of the shaft center part of the fan, so that the shaft center part is ensured to be provided with the assembly to be isolated from hot air flow, the heat generated by the heat dissipation of the fan can not raise the temperature of the camera device, and the heat dissipation air flow can not be blocked, so that the heat dissipation efficiency is ensured.

Further, the optical machine is provided with a top side surface and an inclined surface connecting the top side surface and the rear side surface of the optical machine;

the micro projector further comprises a sound box, the longitudinal section of the sound box is approximately triangular, the sound box is installed on the inclined plane of the optical machine, and one surface of the sound box is opposite to the inclined plane of the optical machine.

The beneficial effect who adopts above-mentioned further scheme is that the inclined plane of audio amplifier is corresponding with the inclined plane of ray apparatus, reduces the erection dimension of ray apparatus and inclined plane, further improves space utilization.

Further, a voice board for receiving voice signals is installed on the side face of the optical machine top, a key board is installed on the voice board, and keys are arranged on the key board;

the shell is also provided with a key cover used for pressing the keys.

The voice board is used for receiving voice signals and transmitting the voice signals to the main board for realizing voice control; the key is mainly a start key and is used for starting the equipment.

Further, the casing includes preceding shell and backshell, preceding shell includes front panel, left panel, right panel, top panel and bottom panel, be provided with on the preceding shell front panel with the corresponding window of projection lens and with the corresponding exhaust vent of radiator, just the exhaust vent is located the projection lens downside, be provided with the fresh air inlet on the backshell.

The beneficial effect who adopts above-mentioned further scheme is that the casing passes through preceding shell and backshell lock formation, and whole succinct pleasing to the eye, and the air intake is used for the cooling air to inhale, and the air outlet is used for the hot-blast to blow out, and the window on the preceding shell front panel further protects projection lens.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram of an explosive structure according to an embodiment of the present invention;

FIG. 3 is an exploded view of a heat dissipation device according to an embodiment of the present invention;

fig. 4 is a schematic view of an internal mounting structure according to an embodiment of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. an optical machine; 2. a sound box; 3. mounting a plate; 4. a main board; 5. a heat sink; 6. a fan; 7. a buffer sleeve; 8. a first bracket; 9. a second bracket; 10. a power plant; 11. a window; 12. a lens decoration; 13. a front housing trim piece; 14. a front housing; 15. a voice support; 16. a voice board; 17. a key sheet; 18. pressing a key; 19. a key cover; 20. a camera device; 21. a foot pad; 22. a rear housing; 23. a housing; 24. a motherboard heat sink; 25. a projection lens; 26. a focusing ring; 27. a gear; 28. a heat conductive substrate; 29. a heat conducting pipe.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.

In the description of the present invention, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and simplicity of description, and do not indicate or imply that the system or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1, fig. 2, fig. 3, and fig. 4, a micro projector according to the present invention is a vertical micro projector, and includes a housing 23, and an optical engine 1, a heat dissipation device, a fan 6, and a projection lens 25 installed in the housing 23; the optical machine 1 is provided with a front side surface and a rear side surface opposite to the front side surface, and the projection lens 25 is connected with the front side surface of the optical machine 1; the heat dissipation device is arranged on the front side surface of the optical machine 1 and positioned on the lower side of the projection lens 25, the heat dissipation device comprises a heat radiator 5, and a gap is formed between the heat radiator 5 and the front side surface of the optical machine 1; the fan 6 is arranged between the optical machine 1 and the radiator 5, an air inlet of the fan 6 faces the optical machine 1, and an air outlet of the fan 6 faces the radiator 5.

According to the micro projector provided by the utility model, the projection lens 25 is connected to the front side surface of the optical machine 1, the heat dissipation device and the fan 6 are arranged at 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 fan 6 installs between radiator 5 and ray apparatus 1, and in the course of the work of miniature projector, fan 6 makes the cooling air get into the fan air intake behind ray apparatus 1, from the fan air outlet flow direction radiator, can in time take away the heat that ray apparatus 1 produced, and the radiating effect is good.

The light engine 1 has a front side and a rear side opposite to the front side, each side being mainly used for mounting accessories and auxiliary devices. Optical elements such as a light source and an optical modulator are installed in an internal cavity of the optical machine 1 to form a projection picture. Both the light source and the light modulator generate heat during operation, which needs to be discharged in time to avoid affecting performance. In one embodiment, the light source is an LED light source and the light modulator is an LCD screen.

The projection lens 25 is connected to the front side of the carriage 1. The projection lens 25 is used to project a projection screen formed by the optical machine 1. In a specific embodiment, the projection lens 25 has an auto-focusing function, specifically, a port is provided on a front side surface of the optical engine 1, the projection lens 25 is connected to the port, a focusing ring 26 for adjusting a focus is mounted outside the projection lens 25, a rack is provided on an outer periphery of the focusing ring 26, and the optical engine 1 is mounted with the power device 10, and in order to further improve a focusing accuracy, the power device 10 may employ a high-precision motor, such as a stepping motor or a servo motor. The output end of the power device 10 is provided with a gear 27 which is meshed and matched with the rack, wherein the power device 10 rotates to drive the focusing ring 26 to rotate, and the focusing ring 26 rotates to drive the projection lens 25 to move axially, so that the focusing of the projection lens 25 is realized.

As shown in fig. 2 and 3, the housing 23 includes a front shell 14 and a rear shell 22, the front shell 14 and the rear shell 22 are integrally molded, the front shell 14 and the rear shell 22 can be connected by snap-fit connection, and in order to further improve the connection strength between the front shell 14 and the rear shell 22, a bolt can be further added between the front shell 14 and the rear shell 22 for locking. Preceding shell 14 includes the front panel, the left panel, the right panel, top panel and bottom panel, be provided with on the front panel of preceding shell 14 with the corresponding window 11 of projection lens 25 and with the exhaust vent that radiator 5 corresponds, and the exhaust vent is located projection lens 25 downside, be provided with the fresh air inlet on the backshell 22, window 11 is used for protecting and supports projection lens 25, prevent that projection lens 25 from appearing the damage, still install camera lens decoration 12 and preceding shell decoration 13 on the window 11, preceding shell decoration 13 can adopt the bolt lock to attach.

In order to enhance the friction force at the bottom of the casing 23, the foot pads 21 are further installed on the bottom sides of the front casing 14 and the rear casing 22, and the foot pads 21 are generally directly adhered in the grooves at the bottom of the casing 23 by using double-sided adhesive tapes.

As shown in fig. 2, fig. 3, and fig. 4, the heat dissipation device is disposed on the front side surface of the optical machine 1 and located under the projection lens 25, the heat dissipation device specifically includes a heat sink 5, the heat sink 5 is made of metal with good heat conductivity, in order to enhance the heat dissipation efficiency of the heat sink 5, the heat sink 5 may be processed to have a plurality of parallel heat dissipation fins, gaps through which cooling air flows are formed between the heat dissipation fins, and when the cooling air flows between the heat dissipation fins, the contact area between the cooling air and the heat dissipation fins is large, thereby improving the heat dissipation efficiency.

In some embodiments, the heat sink 5 includes multiple layers of heat dissipation coils, gaps are formed between the heat dissipation coils, and the gaps between two adjacent layers of heat dissipation coils are staggered, so that when cooling air passes through the gaps between the heat dissipation coils, multiple loops are formed, the contact area between the heat dissipation coils and the cooling air is increased, and the heat dissipation efficiency of the heat sink 5 is further improved.

The heat dissipation device further comprises a heat conduction substrate 28 and at least two heat conduction pipes 29, one side surface of the heat conduction substrate 28 is tightly attached to the optical machine 1, and heat conduction silicone grease can be coated between the heat conduction substrate 28 and the optical machine 1. The heat transfer pipe 29 is substantially U-shaped, one end of the heat transfer pipe 29 is connected to a side surface of the heat transfer substrate 28 away from the optical device 1, and the other end of the heat transfer pipe 29 is inserted into the heat sink 5, so that the heat sink 5 is spaced from the front side surface of the optical device 1 by the heat transfer pipe 29. During the operation of the micro-projector, the optical engine 1 transfers the generated heat to the heat pipe 29 through the heat conducting substrate 28, and the heat pipe 29 transfers the heat to the heat sink 5.

As shown in fig. 2 and fig. 3, the fan 6 is disposed between the optical engine 1 and the heat sink 5, in a specific embodiment, the fan 6 is installed at a gap between the heat sink 5 and the front side surface of the optical engine 1, further, the fan 6 is located between the heat conducting substrate 28 and the heat sink 5, and the fan 6 may be a turbofan, which can increase ventilation volume and improve heat dissipation effect. The air inlet of the fan 6 faces the optical machine 1, and the air outlet of the fan 6 faces the radiator 5.

A support frame is arranged on the front side surface of the optical machine 1 and used for supporting the heat dissipation device and the fan 6. The positioning column is arranged on one side, opposite to the supporting frame, of the optical machine 1, the positioning hole matched with the positioning column is formed in the supporting frame, and the optical machine 1 and the supporting piece can be locked through bolts. The support frame is provided with a heat dissipation flow channel which penetrates through the front side and the rear side, two ends of the heat dissipation flow channel respectively face the optical machine 1 and the front shell 14, the heat dissipation flow channel is communicated with the air flow channel, and the heat radiator 5 and the fan 6 are installed in the heat dissipation flow channel. A buffer sleeve 7 is arranged between the fan 6 and the supporting frame, and in order to enhance the buffer effect, the buffer sleeve 7 can be made of elastic materials such as silica gel. The number of the buffer sleeves 7 can be two, and the two buffer sleeves 7 are respectively sleeved on the upper side and the lower side of the fan 7. In order to facilitate the installation of the heat sink 5 and the fan 6, the support frame comprises a first support 8 and a second support 9, the first support 8 and the second support 9 are connected together in a buckling or splicing manner, and the like, so that a heat dissipation flow channel is formed, and a bolt lock is added. The inboard of first support 8 and second support 9 all is provided with the draw-in groove that is used for block cushion collar 7, and the draw-in groove is fixed with cushion collar 7 block, prevents to appear shifting.

The back side of the radiator 5 opposite to the fan 6 is provided with a camera device 20, the camera device 20 is used for sensing the definition of a projected picture, the position of the camera device 20 on the radiator 5 corresponds to the axial center part of the fan 6, and the size of the camera device 20 is not larger than that of the axial center part 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 heat sink 5 and the axial center portion of the fan 6, the groove corresponds to the axial center portion of the fan 6, a motor for driving the fan blades to rotate is installed on the axial center portion of the fan 6, and the camera device 20 corresponds to the axial center portion of the fan 6, so as to block the airflow at least. The camera mounting panel sets up with the recess in, and the camera is installed on the camera mounting panel, can fix the camera mounting panel in the recess through modes such as bolt lock attaches or welding. Preferably, the bottom of the groove is sealed, and hot air flow cannot pass through the groove, so that the temperature rise of the camera is avoided, and the damage to the camera is avoided. And the size of the camera device 20 is not larger than that of the shaft center part of the fan 6, so that the blockage of the heat dissipation airflow is reduced, and the higher heat dissipation efficiency is further ensured. The housing 23 is provided with a through hole corresponding to the image pickup device 20, and the image pickup device 20 picks up a projection screen through the through hole. Specifically, the through-hole is located on the front case 14.

Be provided with mounting panel 3 on the bottom side of ray apparatus 1, one side that mounting panel 3 deviates from ray apparatus 1 is provided with mainboard 4, has the interval between mounting panel 3 and the mainboard 4 and forms with airflow channel. In the heat dissipation process, cooling air passes through the airflow channel between the mounting plate 3 and the main board 4 to cool the main board 4. The main board 4 is used for overall control of the projector. The main board 4 is provided with a plurality of signal input interfaces which mainly comprise earphone/sound box output, HDM I input, USB flash disk insertion, DC power supply and the like, thereby further improving the universal matching of the utility model.

In order to further enhance the heat dissipation of the optical machine 1, a second heat sink is further arranged on the rear side surface of the optical machine 1; in order to further enhance the heat dissipation of the main board 4, a main board heat sink 24 may be further mounted on the main board 4, heat dissipation silicone grease is coated between the main board heat sink 24 and the main board 4, and a space is provided between the main board heat sink 24 and the mounting plate 3 so that cooling wind can smoothly flow through the space.

In a specific heat dissipation process, cooling air flows into the rear side face of the optical machine 1 from the air inlet hole of the rear shell 22 under the action of the fan 6, cools a second radiator installed on the rear side face of the optical machine 1, then flows through an air flow channel between the main board radiator 24 and the installation plate 3, cools the main board 4 and the main board radiator 24, then enters the air inlet of the fan 6 under the action of the fan 6, flows to the radiator 5 through the air outlet, and is discharged from the air outlet on the front shell 14 after cooling the radiator 5. Through the optimal design of the installation positions of the fan 6 and the radiator 5, cooling air passes through the air channel according to the set air channel, all main parts in the cooling device are cooled, the cooling effect is good, the space utilization rate is high, and the structure is compact.

Bare engine 1 has the top side and connects the inclined plane of bare engine 1 top side and trailing flank, and miniature projector still includes audio amplifier 2, and audio amplifier 2's longitudinal section roughly is triangle-shaped, and audio amplifier 2 installs on bare engine 1's inclined plane, and audio amplifier 2's a surface is relative with bare engine 1's inclined plane, and audio outlet of audio amplifier 2 is towards backshell 22, is provided with out the sound through-hole on the backshell 22. It will be appreciated that the air inlet holes in the rear housing 22 can also be used as sound outlet holes to provide both air inlet and sound outlet effects. Preferably, the longitudinal section of the sound box 2 is substantially a right triangle, the inclined plane of the sound box 2 is opposite to the inclined plane of the optical machine 1, one surface of the sound box 2 is parallel to the top side of the optical machine 1, and the other surface of the sound box 2 is provided with at least one horn sound outlet facing the rear shell 22.

A surface of audio amplifier 2 is relative with the inclined plane of ray apparatus 1, and in the embodiment, be provided with a plurality of reference columns or positioning channel groove on the inclined plane of ray apparatus 1, the reference column tip is provided with the screw thread, be provided with on audio amplifier 2 with screw-thread fit's bolt, install audio amplifier 2 on the inclined plane of ray apparatus 1 through screw thread and bolt, and the installation is firm, audio amplifier 2 can not appear sliding or not hard up, positioning channel groove can be used to further carry out the block spacing to audio amplifier 2.

The sound board 16 for receiving the voice signal is installed on the top side of the optical machine 1, and the top side of the optical machine 1 is connected with the sound board 16 through the voice support 15. The voice board 16 transmits the received voice signal to the main board 4, and automatic voice control can be realized. Install keypad 17 on the pronunciation board 16, keypad 17 installs in pronunciation board 16 middle part, is provided with button 18 on the keypad 17, and button 18 generally is the on-off key, and casing 23 still installs the button lid 19 that is used for pressing button 18 outward, and button lid 19 is fixed with casing 23 buckle, realizes the start and the shutdown to miniature projector through pressing button 18.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A miniature projector characterized in that: comprises that

A shell (23), and an optical machine (1), a heat dissipation device, a fan (6) and a projection lens (25) which are arranged in the shell (23);

the optical machine (1) is provided with a front side surface and a rear side surface opposite to the front side surface, and the projection lens (25) is connected to the front side surface of the optical machine (1);

the heat dissipation device is arranged on the front side surface of the optical machine (1) and is positioned on the lower side of the projection lens (25), the heat dissipation device comprises a heat sink (5), and a gap is formed between the heat sink (5) and the front side surface of the optical machine (1);

the fan (6) is arranged between the optical machine (1) and the radiator (5), an air inlet of the fan (6) faces the optical machine (1), and an air outlet of the fan (6) faces the radiator (5).

2. The pico projector of claim 1, wherein: the heat dissipation device further comprises a heat conduction substrate (28) and at least two heat conduction pipes (29), one side face of the heat conduction substrate (28) is tightly attached to the optical machine (1), the heat conduction substrate (28) is connected with the heat sink (5) through the heat conduction pipes (29), and the fan (6) is located between the heat conduction substrate (28) and the heat sink (5).

3. The pico projector of claim 1, wherein: be provided with mounting panel (3) on the bottom side of ray apparatus (1), mounting panel (3) deviate from one side of ray apparatus (1) is provided with mainboard (4), mounting panel (3) with interval in order to form airflow channel has between mainboard (4).

4. The pico projector of claim 3, wherein: the light machine is characterized in that a support frame is arranged on the front side face of the light machine (1), the support frame is provided with a heat dissipation flow channel which penetrates through the front side face and the rear side face, the heat dissipation flow channel is communicated with the air flow channel, the heat radiator (5) and the fan (6) are installed in the heat dissipation flow channel, and a buffer sleeve (7) is arranged between the fan (6) and the support frame.

5. The pico projector of claim 4, wherein: the support frame includes first support (8) and second support (9), first support (8) with second support (9) are connected and are formed the heat dissipation runner, first support (8) with second support (9) inboard all is provided with and is used for the block draw-in groove of cushion collar (7).

6. The pico projector according to any of claims 1 to 5, wherein: the radiator (5) is provided with a camera device (20) on the side opposite to the fan (6), and the shell (23) is provided with a through hole corresponding to the camera device (20).

7. The pico projector of claim 6, wherein: the position of the camera device (20) on the radiator (5) corresponds to the axial center part of the fan (6), and the size of the camera device (20) is not larger than that of the axial center part of the fan (6).

8. The pico projector of claim 6, wherein: the optical machine (1) is provided with a top side surface and an inclined surface which is connected with the top side surface and the back side surface of the optical machine (1);

the micro projector further comprises a sound box (2), the longitudinal section of the sound box (2) is approximately 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 pico projector of claim 6, wherein: 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);

and a key cover (19) used for pressing the key (18) is also arranged outside the shell (23).

10. The pico projector of claim 4, wherein: casing (23) are including preceding shell (14) and backshell (22), preceding shell (14) are including preceding panel, left panel, right panel, top panel and bottom panel, be provided with on preceding shell (14) the front panel with projecting lens (25) corresponding window (11) and with the corresponding exhaust vent of radiator (5), just the exhaust vent is located projecting lens (25) downside, be provided with the fresh air inlet on backshell (22).

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