CN102540668B - Automatic cleaning projector dust screen device and projector - Google Patents

Abstract

The present invention is applicable to the technical field of projection equipment production, and provides an automatically cleanable projector dust-proof net device and a projector. The dust-proof net device includes a bottom case, a cooling air duct, a control chip, a dust-proof net, A cleaning system consisting of a cleaning air duct, a fan, a motor, and a windshield slot, including a detection system of a wind pressure sensor for detecting the air pressure in the cooling air duct; the fan and the motor are communicated with the control chip; when When the wind pressure sensor detects that the air pressure in the cooling air duct is lower than the set value, it sends a signal to the control chip to start the cleaning system and clean the dust-proof net; the projector includes the above-mentioned The self-cleaning projector dust-proof net device. The automatically cleanable projector dust-proof net device and the projector provided by the present invention can realize automatic detection and cleaning of the projector dust-proof net, avoid manual operation, and greatly improve the convenience and practicability of the projector.

Description

Auto-cleaning projector dust-proof net device and projector

technical field

The invention belongs to the technical field of automatic office equipment production, and more specifically relates to an automatic cleaning dust-proof net device for a projector and a projector.

Background technique

For projectors, dust resistance is an extremely important factor. If the dustproof effect is good, the precision components inside the projector will be well protected, and the life of the projector can be extended a lot. Therefore, the device specially used for dust-proofing of the projector is also the first thing to consider when designing. At present, the dust-proof nets used for projectors on the market are basically used for a period of time, and they need to be manually removed and cleaned before they can be used again, which is troublesome to operate and inconvenient to use.

Contents of the invention

The technical problem to be solved by the present invention is to provide an automatically cleanable projector dust-proof net device, which aims to realize automatic detection and cleaning of the projector dust-proof net, avoid manual operation, and improve the convenience and practicality of the projector sex.

In order to solve the above technical problems, the technical solution adopted by the present invention is to provide an automatically cleanable projector dust-proof net device for preventing dust from entering the interior of the projector, including the bottom case and the cooling air duct, and also includes:

The control chip is used to control the automatic cleaning process of the dust filter device;

A dust-proof net is arranged at the air inlet end of the cooling air duct;

The cleaning system includes an external cleaning air duct, a fan provided at one end of the external cleaning air duct, a motor provided on the cooling air duct, and a windshield installed in the cooling air duct driven by the motor to open and close slot, the fan and the motor are connected in communication with the control chip;

The detection system includes a wind pressure sensor used to detect the air pressure in the cooling air duct, and when the air pressure sensor detects that the air pressure in the cooling air duct is lower than a set value, it sends a start-up instruction to the control chip. Signal to clean the system and clean the filter.

Further, one side of the cooling air duct is provided with a gap penetrating with the cooling air duct, and the wind pressure sensor is fixedly arranged at the gap.

Further, at least one top air inlet and at least one side air inlet are respectively provided on the cooling air passage, and the external cleaning air passage communicates with the top air inlet and the side air inlet on the cooling air passage .

Further, the wind-shielding groove includes a side frame and a plurality of wind-shielding blades rotatably arranged on the side frame, and the output shaft of the motor passes through the transmission assembly and any wind-shielding blade on the wind-shielding groove A plurality of windshields are connected through connecting rods, and when the motor drives the connected windshields to rotate, the connecting rod drives each of the windshields to open or close at the same time.

Further, the transmission assembly includes a pair of gears meshing with each other, one of the gears is arranged on the output shaft of the motor, and the other gear is connected to one end of any wind deflector on the wind deflector groove. connect.

Further, the bottom shell is provided with at least two card slots, and the dust-proof net is provided with at least two buckles, and the dust-proof net is engaged with the card slots through the buckles and is set on the The air inlet end of the cooling air duct described above.

Furthermore, a dust outlet is provided on the bottom case, and the bottommost windshield piece on the windshield groove is adapted to the dust outlet and can open or close the dust outlet.

The beneficial effect of the automatically cleanable projector dust-proof net device provided by the present invention is that: when dust accumulates on the dust-proof net device of the present invention, the automatically-cleanable projector dust-proof net device is sucked by the cooling fan inside the cooling air duct. The air entering will decrease, and the wind pressure will decrease. In this way, the wind pressure inside the cooling air duct can be detected by the wind pressure sensor installed on the cooling air duct to determine the amount of dust on the dust-proof net. When the dust on the dust-proof net When the accumulation is relatively large, the wind pressure detected by the wind pressure sensor 5 is lower than the set value. At this time, a signal to start the cleaning system to clean the dust-proof net will be sent to the control chip, so as to realize automatic cleaning of the dust-proof net. The process does not require manual operation, which is very convenient and practical.

The present invention also provides a projector, which includes a power supply, a main control board, an optical machine and a dust-proof device, the dust-proof device is the above-mentioned automatically cleanable projector dust-proof net device, and the self-cleanable The control chip of the dust-proof net device of the projector is arranged on the main control board, and the power supply, main control board and light engine are arranged on the inner side of the bottom case.

The beneficial effect of the projector provided by the present invention is that: the projector of the present invention adopts the above-mentioned automatically cleanable projector dust-proof net device, so it can be automatically detected by the projector itself whether it has reached the state that needs to be cleaned, when the projector When the amount of dust accumulated on the dust-proof net reaches a certain level, the cleaning system will be automatically activated to clean the dust-proof net. The whole process does not require manual operation, which is very convenient and practical; at the same time, the overall performance of the projector is improved.

Description of drawings

FIG. 1 is a schematic diagram of an explosion decomposition structure of an automatically cleanable projector dust-proof net device provided by an embodiment of the present invention;

FIG. 2 is a three-dimensional structural schematic diagram 1 of an automatically-cleaning dust-proof screen device for a projector provided by an embodiment of the present invention;

Fig. 3 is a three-dimensional structural schematic diagram II of an automatically-cleanable dust-proof screen device for a projector provided by an embodiment of the present invention;

4 is a schematic diagram of an exploded structure of the dust filter and other components of the automatically cleanable projector dust filter device provided by the embodiment of the present invention;

FIG. 5 is a three-dimensional structural schematic diagram of an automatically-cleaning dust-proof screen device for a projector provided by an embodiment of the present invention;

FIG. 6 is a schematic diagram of an exploded structure of the wind pressure sensor and other components of the automatically-cleanable projector dust-proof net device provided by the embodiment of the present invention;

Fig. 7 is a three-dimensional structural schematic diagram 4 of an automatically-cleaning dust-proof screen device for a projector provided by an embodiment of the present invention;

FIG. 8 is a schematic diagram of an exploded structure of the external cleaning air duct and other components of the automatically-cleanable projector dust-proof screen device provided by the embodiment of the present invention;

FIG. 9 is a three-dimensional structural schematic diagram 1 of the automatically cleanable projector dust-proof screen device provided by the embodiment of the present invention after the bottom case is removed;

Fig. 10 is a three-dimensional structural schematic diagram 2 after the bottom case is removed of the automatically-cleaning projector dust-proof net device provided by the embodiment of the present invention;

Fig. 11 is a schematic diagram of the assembly structure of the windshield groove and the motor in the automatically cleanable projector dust-proof screen device provided by the embodiment of the present invention;

Fig. 12 is a schematic diagram of the assembly structure of the bottom case, the windshield groove, and the dust-proof net in the automatically-cleanable projector dust-proof net device provided by the embodiment of the present invention;

Fig. 13 is a structural schematic diagram of the windshield flaps of the windshield groove in the open state of the automatically cleanable projector dustproof net device provided by the embodiment of the present invention;

FIG. 14 is a schematic structural diagram of the windshield blades of the windshield slot in the automatically-cleanable dust filter device for projectors provided by an embodiment of the present invention in a closed state.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Please refer to FIG. 1 to FIG. 8 and FIG. 12 together, and now the automatic cleaning dust filter device for the projector provided by the present invention will be described. The self-cleaning projector dust-proof net device is used to prevent dust from entering the interior of the projector, including a bottom case 1 and a cooling air duct 2, and also includes a control chip for controlling the automatic cleaning process of the dust-proof net device (Fig. Invisible), dust-proof net 3, cleaning system and detection system, the dust-proof net 3 is set at the air inlet end of the cooling air duct 2; the cleaning system includes an external cleaning air duct 41, which is set at the external cleaning A fan 42 at one end of the air duct 41, a motor 43 arranged on the cooling air duct 2, and a windshield slot 44 installed in the cooling air duct 2 and driven by the motor 43 to open and close, the fan 42 And the motor 43 is connected with the control chip in communication; the detection system includes a wind pressure sensor 5 for detecting the air pressure in the cooling air duct 2, when the wind pressure sensor 5 detects that the cooling air duct 2 When the air pressure inside is lower than the set value, a signal is sent to the control chip to start the cleaning system and clean the dust-proof net 3 .

The automatically cleanable projector dust-proof screen device provided by the present invention, when dust is accumulated on the dust-proof screen 3, the gas sucked in by the cooling fan inside the cooling air duct 2 will be reduced, and the wind pressure will be reduced, so that The amount of dust on the dust-proof net 4 can be determined by detecting the wind pressure inside the cooling air duct 2 through the wind pressure sensor 5 installed on the cooling air duct 2. When the dust on the dust-proof net 3 accumulates a lot, the wind The wind pressure detected by the pressure sensor 5 is lower than the set value, and a signal to start the cleaning system to clean the dustproof net 3 will be sent to the control chip at this time, and the fan 42 starts running, and the wind is blown by the external cleaning air duct 41. onto the dust-proof net 3, thereby blowing off the dust on the dust-proof net 3, and realizing the automatic cleaning of the dust-proof net 3, the whole process is fully automatic and does not require manual operation, which is very convenient and practical; at the same time, the overall performance of the projector is improved.

Further, please refer to Fig. 5 and Fig. 6, as a specific embodiment of the automatically cleanable projector dust-proof net device provided by the present invention, one side of the cooling air duct 2 is provided with a There is a notch 50 through which the road passes, and the wind pressure sensor 5 is fixedly arranged at the notch 50 . In this embodiment, the wind pressure sensor 5 can be fixed on the outside of the cooling air duct 2 by screws, and can directly sense the wind pressure in the cooling air duct 2 without occupying the internal space of the cooling air duct 2, and is also convenient Installation, disassembly and maintenance of wind pressure sensor 5.

Further, please refer to FIG. 8 to FIG. 10 , as a specific embodiment of the automatically cleanable projector dust-proof screen device provided by the present invention, the cooling air ducts 2 are respectively provided with at least one top air intake hole 21 and at least one side air inlet 22 , the external cleaning air passage 41 communicates with the top air inlet 21 and the side air inlet 22 on the cooling air passage 2 . In this embodiment, part of the airflow blown by the fan 42 through the external cleaning air duct blows onto the dust-proof net 3 through the top air inlet 21 on the cooling air duct 2, and part of it blows onto the dust-proof net through the side air inlet 22. 3, to ensure that the airflow is fully blown to the dust-proof net 3 from multiple directions to ensure the wind force and dust removal effect.

Further, referring to FIG. 1 and FIG. 11 , as a specific embodiment of the automatically cleanable projector dust-proof screen device provided by the present invention, the windshield groove 44 includes a side frame 440 and a side frame 440 rotatably arranged on the side. The multiple wind deflectors 441 on the frame 440, the output shaft of the motor 43 is connected to any one of the wind deflectors 441 on the wind deflector slot 44 through the transmission assembly, and the plurality of wind deflectors 441 are connected through the connecting rod 442 connected, when the motor 43 drives the wind deflectors 441 connected thereto to rotate, the connecting rod 442 drives each of the wind deflectors 441 to open or close simultaneously. In this embodiment, during normal use of the projector, the plurality of windshield pieces 441 of the windshield groove 44 are in an open state, so that the external cold air enters the inside of the projector from the dustproof net 3; and When the dust accumulated in the dust-proof net 3 reaches a certain amount, the wind pressure sensor 5 will detect that the wind pressure in the cooling air duct 2 has decreased to the set value, and then send a signal to start the cleaning system through the control chip. At this time, the fan 42 and motor 43 start, and under the effect of motor 43, a plurality of wind-shielding pieces 441 of wind-shielding groove 44 just can all pass through connecting rod 442 and close at the same time, at this moment wind-shielding groove 44 and dust-proof net 3 form a narrow and narrow space. space, the wind blown from the fan 42 cannot be blown into the inside of the projector through the cooling duct 2, but can only be blown to the dust filter 3, and the dust on the dust filter 3 is blown off, thereby realizing the dust filter 3 for cleaning.

Further, please refer to Fig. 1 and Fig. 11, as a specific embodiment of the automatically cleanable projector dust filter device provided by the present invention, the transmission assembly includes a pair of mutually meshing gears 432 and 433, wherein The gear 432 is arranged on the output shaft of the motor 43 , and the gear 433 is connected to one end of any wind-shielding piece 441 on the wind-shielding groove 44 . In this embodiment, when the motor 43 is started, the gear 432 cooperates with the gear 433 to drive the windshield 441 connected to the gear 433 to rotate, and at the same time other windshields 441 will also rotate together, thereby realizing opening or closing; The method avoids that the motor 43 is directly arranged on the side of the windshield slot 44 and will increase the lateral size of the projector, which is beneficial to the rational use of space and makes the structure of the projector compact.

Further, please refer to Fig. 1 and Fig. 4, as a specific embodiment of the automatically cleanable projector dust filter device provided by the present invention, the bottom case 1 is provided with at least two card slots 10, the At least two buckles 31 are provided on the dust-proof net 3 , and the dust-proof net 3 is locked on the air inlet end of the cooling air duct 2 through the buckles 31 and the slots 10 . In this embodiment, this buckle-type fixing method is beneficial to the disassembly of the dust-proof net 3, which is not only beneficial to the maintenance of the dust-proof net 3 itself, but also facilitates the windshield located inside it without opening the projector casing. Tank 44 maintenance.

Further, referring to Fig. 13 and Fig. 14, as a specific embodiment of the automatically cleanable projector dust-proof screen device provided by the present invention, the bottom case 1 is provided with a dust outlet (located at the bottom of the bottom case 1 , not visible in the figure), the lowermost windshield piece 441 on the windshield groove 44 is adapted to the dust outlet and can open or close the dust outlet. In this embodiment, the bottommost windshield piece 441 on the windshield slot 44 realizes its opening and closing control by making one end of the connecting rod 442 into a curved arm. The following windshield 441 blocks; when cleaning dust, the dust outlet is opened, and the dust is removed from the outside of the projector from the dust outlet.

The present invention also provides a projector (not shown). The projector includes a power supply, a main control board, an optical engine and a dustproof device, the dustproof device is the above-mentioned automatically cleanable projector dustproof net device, and the automatically cleanable projector dustproof net The control chip of the device is arranged on the main control board, and the power supply, main control board and optical machine are arranged on the inner side of the bottom case.

The projector provided by the present invention adopts the above-mentioned automatically cleanable projector dust-proof net device, so the projector itself can automatically detect whether it needs to be cleaned. When the amount of dust accumulated on the dust-proof net of the projector reaches a certain The cleaning system will be activated automatically to clean the dust-proof net. The whole process does not require manual operation, which is very convenient and practical.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (8)

1. a projector dustproof net arrangement that can automated cleaning, for preventing that dust from entering projector inside, comprises drain pan and cooling air channel, it is characterized in that, also comprises:

Control chip, for controlling the automated cleaning process of dust screen apparatus;

Air Filter, is located at the air inlet end of described cooling air channel;

Cleaning systems, comprise exterior clean air channel, be arranged at one end, described exterior clean air channel fan, be located at the motor on described cooling air channel and be installed on being driven and the groove that keeps out the wind of folding by described motor in described cooling air channel, described fan and described motor are connected with described control chip communication;

Detection system, comprise the blast inductor for detection of the air pressure in cooling air channel, when described blast inductor detects air pressure in described cooling air channel lower than setting value, just to described control chip, send and start described cleaning systems and described Air Filter is carried out to clean signal.

2. projector dustproof net arrangement that can automated cleaning as claimed in claim 1, is characterized in that, a side of described cooling air channel offers the breach connecting with described cooling air channel, and described blast inductor is fixed at described indentation, there.

3. projector dustproof net arrangement that can automated cleaning as claimed in claim 1, it is characterized in that, on described cooling air channel, be respectively equipped with at least one top air admission hole and at least one side air admission hole, described exterior clean air channel communicates with top air admission hole and side air admission hole on described cooling air channel.

4. projector dustproof net arrangement that can automated cleaning as claimed in claim 1, it is characterized in that, the described groove that keeps out the wind comprises frame and is rotatably located at the multi-disc blinker on described frame, the output shaft of described motor by transmission component with described in arbitrary blinker keeping out the wind on groove be connected, described in multi-disc, blinker connects by connecting link, when described motor drives connected blinker to rotate, described connecting link drives blinker described in each open simultaneously or close.

5. projector dustproof net arrangement that can automated cleaning as claimed in claim 4, it is characterized in that, described transmission component comprises a pair of pitch wheel, described in one of them, gear is located on the output shaft of described motor, described in another gear with described in the keep out the wind one end of the arbitrary blinker on groove be connected.

6. projector dustproof net arrangement that can automated cleaning as claimed in claim 1, it is characterized in that, described drain pan is provided with at least two draw-in grooves, described Air Filter is provided with at least two buckles, and described Air Filter coordinates the air inlet end that is arranged in mutually described cooling air channel with described draw-in groove by described buckle.

7. projector dustproof net arrangement that can automated cleaning as claimed in claim 1, is characterized in that, described drain pan is provided with dust-exhausting port, described in one of the bottom blinker that keeps out the wind on groove and described dust-exhausting port is suitable and described dust-exhausting port can be opened or closed.

8.Yi Zhong projector, comprise power supply, master control borad, ray machine and dust guard, it is characterized in that, described dust guard be described in claim 1 to 7 any one can automated cleaning projector dustproof net arrangement, the control chip of described projector dustproof net arrangement that can automated cleaning is located on described master control borad, and described power supply, master control borad, ray machine are located at the inner side of described drain pan.