Projector with auxiliary adjustment of projection area

Abstract

The present invention discloses a projector with auxiliary adjustment of projection area, which relates to the technical field of projectors and comprises a main unit and a projection lens arranged on the front side of the main unit, wherein a storage seat is movably arranged outside the main unit, and sliding grooves are provided on both sides of the top and bottom of the main unit, and a sliding seat is slidably matched in the sliding grooves, and elastic sheets are symmetrically arranged on both sides of the sliding seat, wherein the elastic sheets are arc-shaped structures, and the openings of the elastic sheets face the inner walls of the sliding grooves, and the sliding seat is fixedly connected to the inner walls of the storage seat, and a moving unit and a fine-tuning unit are arranged between the interior of the storage seat and the top of the main unit, and a shielding unit is arranged on the front side of the main unit. The present invention facilitates adjustment of the projection area of ​​the projector, effectively prevents impurities in the air from adhering to the projection lens, and facilitates cleaning of the projection lens to avoid irradiation of the projection lens by strong light.

Description

Technical Field

[0001] The present invention relates to the technical field of projectors, in particular to a projector with auxiliary adjustment of projection area. Background Art

[0002] Projector technology is widely used in corporate meetings, education, home audio and video, commercial exhibitions and other fields, and has become an indispensable tool in modern society. During the use of the projector, in order to make the projector accurately project the image in the specified area, the position of the projector needs to be adjusted, such as:

[0003] Chinese patent application number 2016205166309 discloses a ceiling-mounted projector with a fine-tuning function, including a mounting plate, a lead screw seat is provided on one side of the lower part of the mounting plate, and a fine-tuning seat is provided on the other side, the lead screw seat and the fine-tuning seat are both rotatably matched with a group of lead screws, a driving gear is provided in the middle of the fine-tuning seat, a lead screw gear is provided at one end of the lead screw, a translation seat is installed on the lead screw, an articulated frame and a sleeve are provided at the lower part of the translation seat, a telescopic rod is provided in the sleeve, the articulated frame and the telescopic rod are both hinged to the projector host, and the projector host is provided with a dustproof plate and a heat sink.

[0004] A Chinese patent with application number 2018219963141 discloses an adjustable ceiling-mounted laser projector, including a projector body, a first support plate and a second support plate are respectively provided above the projector body, a rotation adjustment mechanism is connected between the first support plate and the second support plate, both sides of the first support plate are connected with an integrally formed first connecting plate, a second connecting plate is provided on one side below the two groups of the first connecting plates, the projector body is clamped between the second connecting plates, and the first connecting plate and the second connecting plate are respectively provided with a first strip groove and a second strip groove.

[0005] However, the above-mentioned projectors are all installed in a ceiling-mounted manner, and being installed at a high place makes it difficult to adjust the projection area. When installed at a high place, impurities floating in the air are easy to adhere to the projection lens, and it is inconvenient to clean the projection lens. In addition, when the projection lens is illuminated by surrounding light with higher brightness, reflections or glare will be generated, affecting the clarity and quality of the projected image and reducing the visual experience. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the existing defects and provide a projector with auxiliary adjustment of the projection area, which is convenient for adjusting the projection area of ​​the projector, effectively prevents impurities in the air from adhering to the projection lens, and facilitates the cleaning of the projection lens, thereby preventing the projection lens from being irradiated by strong light, and can effectively solve the problems in the background technology.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: a projector with auxiliary adjustment of projection area, comprising a main unit and a projection lens, wherein the projection lens is embedded in the middle of the front side of the main unit, a storage seat is provided on the outside of the main unit, a sliding groove is provided on both sides of the top and bottom of the main unit, a sliding seat is slidably matched in the sliding groove, elastic sheets are symmetrically provided on both sides of the sliding seat, the elastic sheets are arc-shaped structures, and the opening of the elastic sheets faces the inner wall of the sliding groove, and the sliding seat is fixedly connected to the inner wall of the storage seat;

[0008] A moving unit and a fine-adjustment unit are provided between the interior of the storage seat and the top of the main unit, the moving unit is used to drive the telescopic movement of the main unit, the fine-adjustment unit is used to achieve horizontal micro-movement of the main unit, a shielding unit is provided on the front side of the main unit, the shielding unit is used to cover the front side of the main unit and cooperate with the moving unit to achieve shading, and a sealing unit is provided on the shielding unit, the sealing unit is used to seal the projection lens and cooperate with the fine-adjustment unit to clean the projection lens.

[0009] Preferably, the movable unit includes two correspondingly arranged mounting grooves, a tooth plate and a movable gear, the two mounting grooves are respectively opened on both sides of the top of the storage seat, the tooth plate is arranged in the mounting groove, the tooth plate is slidably connected to the mounting groove, a locking mechanism for limiting the tooth plate is provided in the mounting groove, and the bottom of the tooth plate is meshingly connected with the movable gear.

[0010] Preferably, a rotating shaft is provided in the middle of the movable gear, the end of the rotating shaft is rotatably connected to a support, a movable motor is provided on the side of the support, the output shaft of the movable motor is fixedly connected to the end of the rotating shaft, and an electromagnetic block is provided at the end of the gear plate close to the front side of the main machine.

[0011] Preferably, the fine-tuning unit includes a top groove and a tooth groove, the top groove is opened on the top side of the storage seat close to the projection lens, a screw is rotatably connected in the top groove, an adjustment seat that slides with the top groove is threadedly connected on the screw, a tooth block is provided at the bottom of the adjustment seat, and an electrically controlled telescopic mechanism is provided between the adjustment seat and the tooth block.

[0012] Preferably, the tooth groove is opened at the top of the main machine, the tooth groove is meshed with the tooth block, a fine-tuning motor is embedded in the top of the storage seat, and the output shaft of the fine-tuning motor is fixedly connected to the end of the screw rod.

[0013] Preferably, the shielding unit includes a shielding cover and a mounting base, the mounting base is arranged on the top of the main machine, a mounting shaft is rotatably connected inside the mounting base, a mounting plate is provided on the circumferential surface of the mounting shaft, a driving motor is provided on the side of the mounting base, the output shaft of the driving motor is fixedly connected to the end of the mounting shaft, a fixing rod is provided on the mounting plate, the fixing rod is rotatably connected to the mounting plate, and the end of the fixing rod is fixedly connected to the shielding cover.

[0014] Preferably, a torsion spring is sleeved on the fixing rod, and the two ends of the torsion spring are respectively fixedly connected to the shielding cover and the mounting plate, a magnetic block is provided at a position on the surface of the shielding cover corresponding to the electromagnetic block, and light sensors are provided on both sides of the projection lens on the host.

[0015] Preferably, the sealing unit includes a mounting rod and a sealing cover, the mounting rod is rotatably connected to the middle part of the shielding cover, a sealing cover is provided at the end of the mounting rod, the sealing cover corresponds to the position of the projection lens, a cleaning part is provided on the sealing cover, and an arc-shaped gear seat is provided at one end of the outside of the mounting rod.

[0016] The present invention has the following beneficial effects:

[0017] 1. After the projection screen appears, the present invention uses a moving motor to mesh the moving gear and the toothed plate to extend and retract the main unit, thereby adjusting the distance between the projection lens and the projection surface. When the projection screen deviates from the horizontal, the fine-tuning motor drives the screw to rotate, and the adjustment seat and the coordination of the tooth block and the tooth groove drive the main unit to move horizontally, thereby correcting the deviated projection screen.

[0018] 2. When strong light appears on one side of the projection lens, the present invention releases the lock on the toothed plate on that side, and utilizes a mobile motor to drive the mobile gear to rotate and drive the toothed plate to move, so that the electromagnetic block corresponds to the magnetic block, and then a magnetic repulsion force is generated between the electromagnetic block and the magnetic block to drive one side of the shielding cover to rotate downward, thereby shielding the strong light.

[0019] 3. After the main unit is retracted, the present invention utilizes an electrically controlled telescopic mechanism to disengage the tooth block from the tooth groove, and then moves the main unit into the storage seat through a moving unit, so that the arc-shaped tooth seat engages with the bottom of the tooth block, and starts the fine-tuning motor to rotate the drive screw, so that the adjustment seat drives the tooth block to move, and the tooth block drives the arc-shaped tooth seat to rotate, thereby realizing the rotation of the cleaning unit, and the projection lens can be wiped and cleaned.

[0020] 4. After the projection lens is cleaned, the main unit is extended out of the storage seat, and the shielding cover is rotated vertically upward by the driving motor, and then the tooth plate is unlocked. The movable motor is rotated forward and reversely to make the tooth plate reciprocate. When the tooth plate moves toward the shielding cover, it hits the side of the shielding cover, causing the cleaning part to vibrate, thereby shaking off the attached impurities and completing the cleaning of the cleaning part. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a structural schematic diagram of another angle of the present invention;

[0023] Figure 3 This is a schematic diagram of the top structure of the host of the present invention;

[0024] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0025] Figure 5 It is a schematic diagram of the front structure of the host of the present invention.

[0026] In the figure: 1. storage seat; 2. main machine; 201. sliding groove; 202. sliding seat; 203. elastic sheet; 204. projection lens; 3. moving unit; 301. mounting groove; 302. tooth plate; 303. moving gear; 304. support; 305. moving motor; 306. electromagnetic block; 4. fine-tuning unit; 401. top groove; 402. screw rod; 403. adjustment seat; 404. fine-tuning motor; 405. tooth block; 406. tooth groove; 5. shielding unit; 501. shielding cover; 502. mounting seat; 503. mounting shaft; 504. mounting plate; 505. driving motor; 506. fixing rod; 507. torsion spring; 508. magnetic block; 509. photosensor; 6. sealing unit; 601. mounting rod; 602. sealing cover; 603. cleaning unit; 604. arc-shaped tooth seat. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1

[0029] See also Figure 1-5The embodiment of the present invention provides a technical solution, a projector with auxiliary adjustment of projection area, comprising a host 2 and a projection lens 204, wherein the projection lens 204 is embedded in the middle of the front side of the host 2, and a storage seat 1 is provided on the outside of the host 2, wherein the storage seat 1 is a U-shaped frame structure to ensure the heat dissipation effect of the host 2, and sliding grooves 201 are provided on both sides of the top and bottom of the host 2, wherein a sliding seat 202 is slidably matched in the sliding groove 201, and elastic sheets 203 are symmetrically provided on both sides of the sliding seat 202, wherein the elastic sheets 203 are arc-shaped structures, and the opening of the elastic sheets 203 faces the inner wall of the sliding groove 201, and the sliding seat 202 is fixedly connected to the inner wall of the storage seat 1, and the setting of the elastic sheets 203 enables the sliding seat 202 to elastically move along the width direction of the sliding groove 201, and when the sliding seat 202 moves along the length direction of the sliding groove 201, the elastic sheet 203 limits the sliding seat 202 under the action of its own elastic force, so that the sliding seat 202 keeps linear sliding along the length direction of the sliding groove 201.

[0030] A moving unit 3 and a fine-adjustment unit 4 are provided between the interior of the storage seat 1 and the top of the main unit 2. The moving unit 3 is used to drive the telescopic movement of the main unit 2. The fine-adjustment unit 4 is used to realize the horizontal micro-movement of the main unit 2. A shielding unit 5 is provided on the front side of the main unit 2. The shielding unit 5 is used to cover the front side of the main unit 2 and cooperate with the moving unit 3 to achieve shading. A sealing unit 6 is provided on the shielding unit 5. The sealing unit 6 is used to seal the projection lens 204 and cooperate with the fine-adjustment unit 4 to clean the projection lens 204.

[0031] The mobile unit 3 includes two correspondingly arranged installation grooves 301, a tooth plate 302 and a mobile gear 303. The two installation grooves 301 are respectively opened on both sides of the top of the storage seat 1. The tooth plate 302 is arranged in the installation groove 301. The bottom of the tooth plate 302 is meshed and connected with the mobile gear 303. The middle of the mobile gear 303 is provided with a rotating shaft. The end of the rotating shaft is rotatably connected with a support 304. The side of the support 304 is provided with a mobile motor 305. The output shaft of the mobile motor 305 is fixedly connected to the end of the rotating shaft. The mobile motor 305 drives the rotating shaft to drive the mobile gear 303 to rotate. Since the storage seat 1 is fixed to the indoor ceiling or wall by a lifting mechanism, the rotation of the mobile gear 303 drives the main unit 2 to move, thereby realizing the extension and retraction of the main unit 2 in the storage seat 1 and realizing the adjustment of the distance between the projection lens 204 and the projection area.

[0032] The fine-tuning unit 4 includes a top groove 401 and a tooth groove 406. The top groove 401 is arranged at a side of the top of the storage seat 1 close to the projection lens 204. A screw rod 402 is rotatably connected in the top groove 401. An adjustment seat 403 which is slidably matched with the top groove 401 is threadedly connected on the screw rod 402. A tooth block 405 is arranged at the bottom of the adjustment seat 403. The tooth groove 406 is arranged at the top of the host 2. The tooth groove 406 meshes with the tooth block 405. A fine-tuning motor 404 is embedded at the top of the storage seat 1. The output shaft of the fine-tuning motor 404 is fixedly connected to the end of the screw rod 402. The fine-tuning motor 404 drives the screw rod 402 to rotate, so that the adjustment seat 403 drives the tooth block 405 to move horizontally. The tooth block 405 drives the host 2 to move horizontally by cooperating with the tooth groove 406. At the same time, the corresponding elastic sheet 203 is compressed to realize the lateral adjustment of the projection area. The length of the tooth groove 406 is long enough and will not interfere with the telescopic action of the host 2 in the storage seat 1.

[0033] The shielding unit 5 includes a shielding cover 501 and a mounting base 502. The mounting base 502 is arranged on the top of the main unit 2. A mounting shaft 503 is rotatably connected inside the mounting base 502. A mounting plate 504 is provided on the circumferential surface of the mounting shaft 503. A driving motor 505 is provided on the side of the mounting base 502. The output shaft of the driving motor 505 is fixedly connected to the end of the mounting shaft 503. A fixing rod 506 is provided on the mounting plate 504. The end of the fixing rod 506 is fixedly connected to the shielding cover 501. The driving motor 505 drives the mounting shaft 503 to rotate to realize the raising and lowering of the shielding cover 501, so as to shield the control panel and the projection lens 204 on the front side end face of the main unit 2.

[0034] The sealing unit 6 includes a mounting rod 601 and a sealing cover 602. The mounting rod 601 is rotatably connected to the middle part of the shielding cover 501. The end of the mounting rod 601 is provided with a sealing cover 602. The sealing cover 602 corresponds to the position of the projection lens 204. When the shielding cover 501 is rotated to a vertical state and is parallel to the front side of the host 2, the sealing cover 602 corresponds to the end of the projection lens 204.

[0035] When in use, firstly, the moving motor 305 is started, and the reaction force of the meshing of the moving gear 303 and the tooth plate 302 is used to make the main unit 2 extend out of the storage seat 1, and then the driving motor 505 is started, and the mounting shaft 503 is driven to rotate the driving mounting plate 504 and the fixing rod 506 to drive the shielding cover 501 to flip, so that the shielding cover 501 rotates to the position as shown in the figure. Figure 1In the horizontal state shown, the host 2 is started, and after the projection image appears on the projection plane, the moving motor 305 is used again to slightly extend and retract the host 2 to adjust the distance between the projection lens 204 and the projection surface. When the projection image deviates from the projection area, the fine-tuning motor 404 is used to drive the screw 402 to rotate, and the linear motion of the adjustment seat 403 and the cooperation between the tooth block 405 and the tooth groove 406 are used to drive the host 2 to move horizontally, so that the projection image is adjusted to within the projection area. During the horizontal and lateral movement, the elastic sheet 203 is compressed to make the sliding seat 202 move along the width direction of the sliding groove 201.

[0036] The gear plate 302 is reset to the mounting groove 301 by the reverse rotation of the moving motor 305, and the host 2 is retracted into the receiving seat 1 by the moving unit 3, and the shielding cover 501 is rotated to a vertical state, so that the sealing cover 602 is correspondingly fitted with the groove in which the projection lens 204 is embedded.

[0037] Embodiment 2

[0038] See also Figure 1-5 Based on the projector with auxiliary adjustment of projection area provided in the first embodiment, the applicant found that during use, there is strong light around the projection lens 204, and when the strong light is irradiated on the projection lens 204, it will affect the image quality on the projection plane, so the following improvements are made:

[0039] Light sensors 509 are disposed on both sides of the projection lens 204 on the host 2 . The light sensors 509 are used to detect the light intensity on both sides of the projection lens 204 to determine whether the light intensity affects the projection lens 204 .

[0040] The tooth plate 302 is slidably connected to the mounting groove 301. A locking mechanism for limiting the tooth plate 302 is provided in the mounting groove 301. The locking mechanism is in a locked state in the initial state, that is, the tooth plate 302 is fixed in the mounting groove 301. When the locking mechanism is unlocked, the tooth plate 302 can slide along the mounting groove 301.

[0041] The fixing rod 506 is rotatably connected to the mounting plate 504, and a torsion spring 507 is sleeved on the fixing rod 506. The two ends of the torsion spring 507 are respectively fixedly connected to the shielding cover 501 and the mounting plate 504. The setting of the torsion spring 507 enables the shielding cover 501 to be elastically twisted and reset around the fixing rod 506. During normal use, the elastic limit of the torsion spring 507 keeps the shielding cover 501 in a horizontal state.

[0042] An electromagnetic block 306 is provided at the end of the tooth plate 302 close to the front side of the main unit 2, and a magnetic block 508 is provided at a position on the surface of the shielding cover 501 corresponding to the electromagnetic block 306. When the tooth plate 302 drives the electromagnetic block 306 to move to a position corresponding to the magnetic block 508, a magnetic force is generated between the electromagnetic block 306 and the magnetic block 508 to act on the shielding cover 501.

[0043] When in use, when the light sensor 509 on one side detects that the light intensity on that side is greater than the set threshold, the locking mechanism on the side close to the strong light releases the lock on the toothed plate 302 on that side, and starts the moving motor 305. By driving the moving gear 303 to rotate, the toothed plate 302 on that side moves linearly. At this time, the friction between the elastic sheet 203 and the sliding slot 201 is not enough to make the main unit 2 move linearly, so only the linear movement of the toothed plate 302 can be achieved. The toothed plate 302 drives the electromagnetic block 306 to move linearly, so that the position of the electromagnetic block 306 on this side corresponds to the position of the magnetic block 508. At this time, the electromagnetic Block 306 is powered, so that a magnetic repulsion force is generated between the electromagnetic block 306 and the magnetic block 508 on this side, so that the side of the shielding cover 501 close to the strong light rotates downward around the central axis of the fixing rod 506, and at the same time the torsion spring 507 is twisted, and the light is blocked during the rotation of the shielding cover 501. When the photosensor 509 on this side detects that the light intensity on this side is less than the set threshold, it means that the blocking of the strong light is completed, and the magnitude of the magnetic repulsion force between the electromagnetic block 306 and the magnetic block 508 is kept unchanged at this time, so that the strong light on this side can be continuously shielded, thereby preventing the strong light from directly shining on the projection lens 204.

[0044] After use, the electromagnetic block 306 stops supplying power, the twisted torsion spring 507 drives the shielding cover 501 to return to a horizontal state, and the driving motor 505 is used to rotate the shielding cover 501 to a vertical downward state, and the reverse rotation of the moving motor 305 is used to restore the tooth plate 302 to the installation groove 301, and the locking mechanism locks the tooth plate 302 again.

[0045] In addition, during use, since the projection lens 204 is exposed to the air for a long time and the host 2 is located at a high position, impurities floating in the air will adhere to the projection lens 204, making it difficult to clean. In order to solve the above problem:

[0046] An electrically controlled telescopic mechanism is provided between the adjustment seat 403 and the tooth block 405 for controlling the lifting and lowering adjustment of the tooth block 405. The electrically controlled telescopic mechanism is preferably an electric telescopic rod, and may also be an electromagnetic telescopic device.

[0047] The sealing cover 602 is provided with a cleaning part 603 , which is preferably a lens-specific wiping cloth. When the shielding cover 501 is in a vertical state, the wiping cloth fits against the projection lens 204 , and an arc-shaped tooth seat 604 is provided at one end of the outer side of the mounting rod 601 .

[0048] After use is completed and the main unit 2 is retracted into the storage seat 1, the electrically controlled telescopic mechanism is used to drive the tooth block 405 to rise, so that the tooth block 405 is disengaged from the tooth groove 406. At this time, the arc-shaped tooth seat 604 is in a vertical upward state, and the moving unit 3 is used to continue to retract the main unit 2 into the storage seat 1. At the same time, the arc-shaped tooth seat 604 moves toward the inside of the storage seat 1 until the arc-shaped tooth seat 604 and the bottom of the tooth block 405 are correspondingly engaged and stop. At this time, the fine-tuning motor 404 is rotated to drive the screw 402 to rotate, so that the adjustment seat 403 drives the tooth block 405 to move in a straight line, and the tooth block 405 drives the arc-shaped tooth seat 604 to rotate, so as to realize the rotation of the cleaning unit 603 to wipe the projection lens 204 and remove the attached impurities.

[0049] It is worth noting that in order to prevent the projection lens 204 from being worn and to ensure the cleaning effect, the fine-tuning motor 404 only rotates in one direction once, that is, the cleaning unit 603 rotates in one direction around the mounting rod 601 at a certain angle, to prevent the cleaning unit 603 from rotating back and forth to cause the projection lens 204 to be worn and the impurities wiped off from adhering to the projection lens 204 again, affecting the cleaning effect.

[0050] However, after the cleaning unit 603 finishes wiping and cleaning the projection lens 204, the cleaning unit 603 will be attached with impurities and cannot be used again. Therefore, in order to ensure the continuity of the use of the cleaning unit 603, the following improvements are made:

[0051] When the locking mechanism locks the tooth plate 302, first start the moving motor 305 to extend the main unit 2 out of the storage seat 1, and then start the driving motor 505 to rotate the shielding cover 501 from the vertical downward state to the vertical upward state, that is, the arc-shaped tooth seat 604 is in a downward state, and then the locking mechanism releases the lock on the tooth plate 302, and starts the moving motor 305 to rotate the moving motor 305 forward and reverse, and the tooth plate 302 is meshed with the moving gear 303 to make the tooth plate 302 reciprocate in a straight line. When the tooth plate 302 moves toward the side of the shielding cover 501, the end of the tooth plate 302 hits the side of the shielding cover 501, so that the shielding cover 501 and the cleaning part 603 vibrate, so that the impurities attached to the cleaning part 603 can be shaken off, and the cleaning part 603 is cleaned.

[0052] Therefore, the present invention realizes shielding of strong light on one side by means of the linkage and cooperation between the moving unit 3 and the shielding unit 5, thereby preventing the strong light from irradiating the projection lens 204; the projection lens 204 is cleaned and the attached impurities are removed by means of the linkage and cooperation between the fine-tuning unit 4 and the sealing unit 6; finally, the impurities attached to the cleaning part 603 are removed by means of the linkage and cooperation between the moving unit 3 and the shielding unit 5 in another state, thereby ensuring the continuous and multiple use of the cleaning part 603.

[0053] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A projector with auxiliary adjustment of projection area, comprising a host (2) and a projection lens (204), characterized in that: The projection lens (204) is embedded in the middle of the front side of the main unit (2); a storage seat (1) is movably provided on the outside of the main unit (2); light sensors (509) are provided on both sides of the projection lens (204) on the main unit (2); sliding grooves (201) are provided on both sides of the top and bottom of the main unit (2); a sliding seat (202) is slidably fitted in the sliding groove (201); elastic sheets (203) are symmetrically provided on both sides of the sliding seat (202); the elastic sheets (203) are of an arc-shaped structure, and the opening of the elastic sheets (203) faces the inner wall of the sliding groove (201); the sliding seat (202) is fixedly connected to the inner wall of the storage seat (1); A moving unit (3) and a fine-adjustment unit (4) are provided between the interior of the storage seat (1) and the top of the main unit (2); the moving unit (3) is used to drive the telescopic movement of the main unit (2); the fine-adjustment unit (4) is used to achieve a micro-horizontal movement of the main unit (2); a shielding unit (5) is provided on the front side of the main unit (2); the shielding unit (5) is used to cover the front side of the main unit (2) and cooperate with the moving unit (3) to achieve light shielding; a sealing unit (6) is provided on the shielding unit (5); the sealing unit (6) is used to seal the projection lens (204) and cooperate with the fine-adjustment unit (4) to clean the projection lens (204); The moving unit (3) comprises two correspondingly arranged mounting grooves (301), a tooth plate (302) and a moving gear (303); the two mounting grooves (301) are respectively arranged on both sides of the top of the storage seat (1); the tooth plate (302) is arranged in the mounting groove (301); the tooth plate (302) is slidably connected to the mounting groove (301); a locking mechanism for limiting the position of the tooth plate (302) is arranged in the mounting groove (301); and the bottom of the tooth plate (302) is meshingly connected with the moving gear (303); A rotating shaft is provided in the middle of the moving gear (303), the end of the rotating shaft is rotatably connected to a support (304), a moving motor (305) is provided on the side of the support (304), an output shaft of the moving motor (305) is fixedly connected to the end of the rotating shaft, and an electromagnetic block (306) is provided at the end of the toothed plate (302) close to the front side of the main machine (2); The shielding unit (5) comprises a shielding cover (501) and a mounting seat (502), wherein the mounting seat (502) is arranged on the top of the main unit (2), a mounting shaft (503) is rotatably connected inside the mounting seat (502), a mounting plate (504) is provided on the circumferential surface of the mounting shaft (503), a driving motor (505) is provided on the side surface of the mounting seat (502), an output shaft of the driving motor (505) is fixedly connected to the end of the mounting shaft (503), a fixing rod (506) is provided on the mounting plate (504), the fixing rod (506) is rotatably connected to the mounting plate (504), and the end of the fixing rod (506) is fixedly connected to the shielding cover (501); A torsion spring (507) is sleeved on the fixing rod (506), and two ends of the torsion spring (507) are respectively fixedly connected to the shielding cover (501) and the mounting plate (504), and a magnetic block (508) is provided at a position on the surface of the shielding cover (501) corresponding to the electromagnetic block (306).

2. The projector with auxiliary adjustment of projection area according to claim 1, characterized in that: The fine adjustment unit (4) comprises a top groove (401) and a tooth groove (406); the top groove (401) is provided on a side of the top of the storage seat (1) close to the projection lens (204); a screw rod (402) is rotatably connected in the top groove (401); an adjustment seat (403) slidably matched with the top groove (401) is threadedly connected on the screw rod (402); a tooth block (405) is provided at the bottom of the adjustment seat (403); and an electrically controlled telescopic mechanism is provided between the adjustment seat (403) and the tooth block (405).

3. The projector with auxiliary adjustment of projection area according to claim 2, characterized in that: The tooth groove (406) is opened at the top of the main machine (2), and the tooth groove (406) is meshed with the tooth block (405). A fine-tuning motor (404) is embedded in the top of the storage seat (1), and the output shaft of the fine-tuning motor (404) is fixedly connected to the end of the screw rod (402).

4. The projector with auxiliary adjustment of projection area according to claim 1, characterized in that: The sealing unit (6) comprises a mounting rod (601) and a sealing cover (602); the mounting rod (601) is rotatably connected to the middle part of the shielding cover (501); the end of the mounting rod (601) is provided with a sealing cover (602); the sealing cover (602) corresponds to the position of the projection lens (204); a cleaning portion (603) is provided on the sealing cover (602); and an arc-shaped tooth seat (604) is provided at one end of the outside of the mounting rod (601).

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