CN112764299B - Dustproof equipment for lens of cinema projector - Google Patents
Dustproof equipment for lens of cinema projector Download PDFInfo
- Publication number
- CN112764299B CN112764299B CN202110202068.8A CN202110202068A CN112764299B CN 112764299 B CN112764299 B CN 112764299B CN 202110202068 A CN202110202068 A CN 202110202068A CN 112764299 B CN112764299 B CN 112764299B
- Authority
- CN
- China
- Prior art keywords
- cinema projector
- lens
- projector lens
- clamping
- shielding plates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000428 dust Substances 0.000 claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 7
- 230000008602 contraction Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/145—Housing details, e.g. position adjustments thereof
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
Abstract
The invention discloses a dustproof device for a cinema projector lens, which structurally comprises a supporting plate, an underframe, a dustproof device and a radiating groove, wherein the bottom of the supporting plate is welded at the rear end of the underframe, the upper end of the supporting plate is hinged with the side surface of the rear end of the dustproof device, four shielding plates are ensured to rotate and open through rotating around a torsion shaft by pushing a fixing ring and rotating around the torsion shaft by a rotating block, the cinema projector lens is exposed, otherwise, the four shielding plates are closely adsorbed by magnetic sheets between the shielding plates after being closed, dust is prevented from contacting with the cinema projector lens, a connecting pipe is displaced outside the cinema projector lens, the outer side surface of the lens can stably slide on a clamping sheet through the micro-rotation of the clamping sheet around a connecting shaft on the hinging sheet, the cinema projector lens is fixed after rotating and adjusting the focal length by the clamping of the clamping strip, the focal length of the lens of the cinema projector is prevented from changing.
Description
Technical Field
The invention relates to the field of cinema viewing equipment, in particular to dustproof equipment for a cinema projector lens.
Background
Cinema plays the film and projects through cinema projector lens, the clean degree of camera lens is very important, cinema projector lens is in the in-process of placing, need use dust keeper to come to prevent dust protection to projector's camera lens, avoid the camera lens to be influenced by dust, ensure that the camera lens carries out the projection work of high definition, but because cinema projector lens is longer, need to highlight its protection, and cinema projector lens need rotate and adjust the focus, the dust keeper of highlighting protection causes the camera lens easily and blocks, cause the camera lens to be in the in-process of carrying out the projection easily, produce the shadow, be in the inside dust keeper of highlighting protection when the camera lens is adjusted the focus simultaneously, operating personnel is inconvenient to operate in narrow and small space, cause the camera lens to adjust the focus and produce the error easily, thereby lead to the definition decline of camera lens show.
Disclosure of Invention
The technical scheme adopted by the invention for realizing the technical purpose is as follows: this a dustproof facilities for cinema projector camera lens, its structure includes backup pad, chassis, dust keeper, radiating groove, the backup pad bottom welds in the chassis rear end to the backup pad upper end is articulated mutually with dust keeper rear end side, dust keeper side end inlays admittedly and installs the radiating groove, dust keeper includes dust cover, standing groove, opening and closing door, closing device, telescoping device, the inside embedding of dust cover installs the standing groove to dust cover rear end and opening and closing door upper end are articulated mutually, the dust cover front end is fixed mutually with the telescoping device rear end, the telescoping device front end is equipped with closing device, opening and closing door lower extreme is the radius angle structure.
As a further improvement of the invention, the closing device comprises a fixing ring, a rotating block, a torsion shaft and dustproof baffles, wherein the fixing ring is fixedly arranged at the front end of the telescopic device, the rotating block is arranged in the fixing ring in a clearance fit manner, the torsion shaft penetrates through the rotating block in a clearance fit manner, the inner side end of the rotating block is welded to the outer side end of the dustproof baffle, the rotating block, the torsion shaft and the dustproof baffles are respectively arranged in four directions in the fixing ring, the dustproof baffles are of right-angle fan-shaped structures, and the four dustproof baffles form a disc-shaped structure and have diameters matched with the inner diameter of the fixing ring.
As a further improvement of the invention, the dustproof baffle comprises a shielding plate, magnetic sheets, rubber strips and pulleys, the magnetic sheets are arranged on the inner wall of the shielding plate, the rubber strips are tightly attached to the surface of the shielding plate, the pulleys are slidably mounted on the surface of the shielding plate, and the two magnetic sheets are opposite magnetic poles and are respectively arranged on the right-angle end faces of the two sides of the shielding plate.
As a further improvement of the present invention, the telescopic device includes a telescopic hose, a connecting pipe, and a sliding mechanism, wherein the front end of the telescopic hose is fixed to the rear end face of the fixing ring, the connecting pipe is fixed to the middle of the telescopic hose, the sliding mechanism is disposed on the inner wall of the connecting pipe, the telescopic hose is of a corrugated structure and made of rubber, and has a certain resilience, and four sliding mechanisms are disposed on the inner wall of the connecting pipe in four directions.
As a further improvement of the invention, the sliding mechanism comprises a fixed rod, a spring, a hinge plate, a connecting shaft and a clamping plate, one end of the fixed rod is welded on the inner wall surface of the connecting pipe, the other end of the fixed rod is installed inside the hinge plate in a clearance fit manner, the spring is arranged inside the hinge plate and welded with the fixed rod, the hinge plate is hinged with the outer end of the clamping plate through the connecting shaft, and the hinge plate is close to the clamping plate, is of an arc surface structure and is provided with a groove.
As a further improvement of the invention, the clamping sheet comprises a clamping strip and a roller, the outer side end of the clamping strip is hinged with the hinge sheet through a connecting shaft, the roller is arranged on the end surface of the inner side of the clamping strip, the clamping strip is of an arc structure, and the radian of the clamping strip is matched with that of a lens of a cinema projector.
The invention has the beneficial effects that:
1. when the cinema projector lens needs to be used, the fixing ring is pushed, at the moment, the front end of the cinema projector lens is in contact with the rubber strip, the four shielding plates are rotated around the torsion shaft through the rotating block, the cinema projector lens is exposed and can be projected, otherwise, the four shielding plates are closed, the four shielding plates are tightly adsorbed through the magnetic sheets between the shielding plates, and dust is prevented from being in contact with the cinema projector lens.
2. The shrink through flexible hose, thereby it carries out the displacement in the cinema projector camera lens outside to have driven the connecting pipe, rotate a little on articulated piece round the connecting axle through the snap-on piece, and the gyro wheel is supplementary to be slided, thereby ensure that the camera lens outside surface can carry out steady slip on the snap-on piece, cinema projector lens to after exposing rotates the focus and adjusts, block through the card strip, fix after the regulation focus is rotated to cinema projector lens, avoid cinema projector lens's focus to change.
Drawings
Fig. 1 is a schematic structural view of a dust-proof apparatus for a lens of a cinema projector according to the present invention.
Fig. 2 is a schematic side view of the dustproof device according to the present invention.
FIG. 3 is a schematic view of the internal structure of a closure device of the present invention.
Fig. 4 is a perspective internal structure schematic view of a dust-proof baffle of the present invention.
Fig. 5 is a schematic view of the internal structure of a telescopic device according to the present invention.
Fig. 6 is a schematic view of the internal structure of a sliding mechanism according to the present invention.
Fig. 7 is a schematic perspective view of a card sheet according to the present invention.
In the figure: the device comprises a supporting plate-1, an underframe-2, a dust-proof device-3, a heat dissipation groove-4, a dust cover-31, a placing groove-32, an opening and closing door-33, a closing device-34, a telescopic device-35, a fixed ring-341, a rotating block-342, a torsion shaft-343, a dust-proof baffle-344, a baffle-44 a, a magnetic sheet-44 b, a rubber strip-44 c, a pulley-44 d, a telescopic hose-351, a connecting pipe-352, a sliding mechanism-353, a fixed rod-53 a, a spring-53 b, a hinged sheet-53 c, a connecting shaft-53 d, a clamping sheet-53 e, a clamping strip-e 1 and a roller-e 2.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
example 1:
as shown in figures 1 to 4:
the invention relates to a dustproof device for a lens of a cinema projector, which structurally comprises a supporting plate 1, an underframe 2, a dustproof device 3 and a radiating groove 4, wherein the bottom of the supporting plate 1 is welded at the rear end of the underframe 2, the upper end of the supporting plate 1 is hinged with the side surface of the rear end of the dustproof device 3, the side surface end of the dustproof device 3 is fixedly embedded with the radiating groove 4, the dustproof device 3 comprises a dustproof cover 31, a placing groove 32, an opening and closing door 33, a closing device 34 and a telescopic device 35, the placing groove 32 is fixedly embedded in the dustproof cover 31, the rear end of the dustproof cover 31 is hinged with the upper end of the opening and closing door 33, the front end of the dustproof cover 31 is fixed with the rear end of the telescopic device 35, the front end of the telescopic device 35 is provided with the closing device 34, the lower end of the opening and closing door 33 is of a rounded structure, the upper end of the opening and closing door 33 can rotate around the inner wall of the dustproof cover 31, and the lower end of the opening and closing door 33 can be prevented from colliding with the inner wall of the dustproof cover 31, when the projector is placed on the inner wall of the dust cover 31, the opening/closing door 33 is automatically opened/closed to reduce the entry of external dust into the dust cover 31.
The closing device 34 includes a fixed ring 341, a rotating block 342, a torsion shaft 343, and a dust guard 344, the fixed ring 341 is fixedly mounted at the front end of the expansion device 35, the rotating block 342 is mounted inside the fixed ring 341 in a clearance fit, the torsion shaft 343 penetrates inside the rotating block 342 in a clearance fit, the inner end of the rotating block 342 is welded to the outer end of the dust guard 344, four rotating blocks 342, four torsion shafts 343, and four dust guards 344 are provided, and are respectively provided at four positions inside the fixed ring 341, the dust guard 344 has a right-angle fan-shaped structure, and the four dust guards 344 form a disk-shaped structure, and have a diameter matching the inner diameter of the fixed ring 341, thereby ensuring that the inside of the fixed ring 341 can be closed, and preventing dust on the lens of the cinema projector.
The dustproof baffle 344 comprises a shielding plate 44a, a magnetic sheet 44b, a rubber strip 44c and pulleys 44d, the magnetic sheet 44b is arranged on the inner wall of the shielding plate 44a, the rubber strip 44c is tightly attached to the surface of the shielding plate 44a, the pulleys 44d are slidably mounted on the surface of the shielding plate 44a, the magnetic sheets 44b are two in number and are opposite magnetic poles, and the two opposite magnetic poles are respectively arranged on the right-angle end surfaces of two sides of the shielding plate 44a, so that the four shielding plates 44a are favorably and tightly adsorbed, the sealing performance between the shielding plates 44a is improved, and dust is prevented from contacting with a lens of a cinema projector.
The specific use mode and function of the embodiment are as follows:
in the invention, the upper end of the opening and closing door 33 rotates around the inner wall of the dust cover 31 to the rear end, so that the placing groove 32 in the dust cover 31 is in an open state, then the cinema projector is placed in the placing groove 32, the lens at the front end of the cinema projector extends into the expansion device 35, then the opening and closing door 33 is automatically closed, so as to prevent dust for the cinema projector lens, when the cinema projector lens needs to be used, the front end of the cinema projector lens contacts with the rubber strip 44c by pushing the fixing ring 341, so as to push the shielding plate 44a to rotate, the rotating block 342 rotates around the torsion shaft 343 to ensure that the four shielding plates 44a rotate and open, in the rotating and opening process, the pulley 44d contacts with the outer side of the cinema projector lens, so as to ensure that the cinema projector lens pushes the shielding plate 44a to open smoothly, and avoid the shielding plate 44a colliding with the cinema projector lens, when the four shielding plates 44a are completely opened, the lens of the cinema projector is exposed, and projection work can be performed, otherwise, after the four shielding plates 44a are closed, the four shielding plates 44a are tightly adsorbed by the magnetic sheets 44b between the shielding plates 44a, so that the sealing property between the shielding plates 44a is improved, and dust is prevented from contacting the lens of the cinema projector.
Example 2:
as shown in fig. 5 to 7:
wherein the extension device 35 comprises an extension hose 351, a connection pipe 352, and a sliding mechanism 353, the front end of the extension hose 351 is fixed with the rear end face of the fixing ring 341, the connection pipe 352 is fixed at the middle part of the extension hose 351, the sliding mechanism 353 is arranged on the inner wall of the connection pipe 352, the extension hose 351 is of a fold structure and is made of rubber material and has a certain resilience, the cinema projector lens is positioned in the extension hose 351, the cinema projector lens is exposed through the extension and contraction of the extension hose 351 so as to adjust the focal length of the cinema projector lens, the sliding mechanism 353 is provided with four in total, and is arranged on four directions of the inner wall of the connection pipe 352 to assist the extension and contraction sliding between the four directions of the outer side surface of the cinema projector lens and the extension hose 351 so as to ensure that the extension hose 351 can smoothly slide and expand outside the cinema projector lens, the lens of the cinema projector is prevented from colliding with the inside of the flexible hose 351.
The sliding mechanism 353 comprises a fixing rod 53a, a spring 53b, a hinge piece 53c, a connecting shaft 53d and a clamping piece 53e, one end of the fixing rod 53a is welded on the inner wall surface of the connecting pipe 352, the other end of the fixing rod 53a is installed inside the hinge piece 53c in a clearance fit mode, the spring 53b is arranged inside the hinge piece 53c, the spring 53b is welded with the fixing rod 53a, the hinge piece 53c is hinged with the outer side end of the clamping piece 53e through the connecting shaft 53d, the hinge piece 53c is close to the clamping piece 53e and is of an arc-shaped structure, a groove is formed in the hinge piece 53c, the clamping piece 53e can be adjusted in an angle rotation mode on the hinge piece 53c, and collision between the clamping piece 53e and the hinge piece 53c in the angle adjustment process is avoided.
The clamping piece 53e comprises a clamping strip e1 and a roller e2, the outer end of the clamping strip e1 is hinged to the hinge piece 53c through a connecting shaft 53d, the roller e2 is mounted on the inner end face of the clamping strip e1, the clamping strip e1 is of an arc structure, the radian of the clamping strip e is matched with that of the lens of the cinema projector, the clamping strip e1 is guaranteed to be abutted and attached to the outer side of the lens of the cinema projector, the lens of the cinema projector is fixed after being rotated to adjust the focal length, and the focal length of the lens of the cinema projector is prevented from changing.
The specific use mode and function of the embodiment are as follows:
in the invention, when the lens of the cinema projector is exposed, by the contraction of the telescopic hose 351, thereby driving the connection pipe 352 to displace at the outside of the lens of the cinema projector, and in the process of displacement, through the elastic extrusion of the fixing rod 53a and the spring 53b, thereby ensuring the engagement piece 53e to collide with the outer surface of the lens for buffering, preventing the outer surface of the lens from being damaged, at the same time, by the engaging piece 53e slightly rotating on the hinge piece 53c around the connecting shaft 53d, and the roller e2 assists sliding, thereby ensuring that the lens outer surface can slide smoothly on the engaging piece 53e to expose the lens of the cinema projector, then, the exposed lens of the cinema projector is adjusted in the rotating focal length, and after the focal length is adjusted, the lens is clamped by the clamping strip e1, the lens of the cinema projector is fixed after being rotated to adjust the focal length, so that the change of the focal length of the lens of the cinema projector is avoided.
The technical solutions of the present invention or similar technical solutions designed by those skilled in the art based on the teachings of the technical solutions of the present invention are all within the scope of the present invention to achieve the above technical effects.
Claims (2)
1. The utility model provides a dustproof facilities for cinema projector lens, its structure includes backup pad (1), chassis (2), dust keeper (3), radiating groove (4), backup pad (1) bottom welds in chassis (2) rear end to backup pad (1) upper end is articulated mutually with dust keeper (3) rear end side, dust keeper (3) side end inlays solid and installs radiating groove (4), its characterized in that: the dustproof device (3) comprises a dustproof cover (31), a placing groove (32), an opening and closing door (33), a closing device (34) and a telescopic device (35), the placing groove (32) is fixedly embedded in the dustproof cover (31), the rear end of the dustproof cover (31) is hinged with the upper end of the opening and closing door (33), the front end of the dustproof cover (31) is fixed with the rear end of the telescopic device (35), and the closing device (34) is arranged at the front end of the telescopic device (35); the closing device (34) comprises a fixed ring (341), a rotating block (342), a torsion shaft (343) and a dustproof baffle plate (344), the fixed ring (341) is fixedly installed at the front end of the telescopic device (35), the rotating block (342) is installed inside the fixed ring (341) in a clearance fit mode, the torsion shaft (343) penetrates through the rotating block (342) in a clearance fit mode, and the inner end of the rotating block (342) is welded to the outer end of the dustproof baffle plate (344); the dustproof baffle (344) comprises a shielding plate (44a), a magnetic sheet (44b), a rubber strip (44c) and a pulley (44d), the magnetic sheet (44b) is arranged on the inner wall of the shielding plate (44a), the rubber strip (44c) is tightly attached to the surface of the shielding plate (44a), and the pulley (44d) is slidably mounted on the surface of the shielding plate (44 a); the telescopic device (35) comprises a telescopic hose (351), a connecting pipe (352) and a sliding mechanism (353), the front end of the telescopic hose (351) is fixed with the end face of the rear side of the fixing ring (341), the connecting pipe (352) is fixed in the middle of the telescopic hose (351), and the sliding mechanism (353) is arranged on the inner wall of the connecting pipe (352); the sliding mechanism (353) comprises a fixing rod (53a), a spring (53b), a hinge piece (53c), a connecting shaft (53d) and a clamping piece (53e), one end of the fixing rod (53a) is welded on the inner wall surface of the connecting pipe (352), the other end of the fixing rod (53a) is installed inside the hinge piece (53c) in a clearance fit mode, the spring (53b) is arranged inside the hinge piece (53c), the spring (53b) is welded with the fixing rod (53a), and the hinge piece (53c) is hinged with the outer side end of the clamping piece (53e) through the connecting shaft (53 d); the clamping piece (53e) comprises a clamping strip (e1) and a roller (e2), the outer end of the clamping strip (e1) is hinged to the hinge piece (53c) through a connecting shaft (53d), and the roller (e2) is installed on the inner end face of the clamping strip (e 1).
2. A dust-proofing apparatus for a lens of a cinema projector according to claim 1, wherein: when the cinema projector lens needs to be used, the front end of the cinema projector lens is contacted with the rubber strip (44c) by pushing the fixed ring (341), so that the shielding plate (44a) is pushed to rotate, the four shielding plates (44a) are ensured to rotate and open by rotating the rotating block (342) around the torsion shaft (343), and the pulley (44d) is contacted with the outer side of the cinema projector lens in the rotating and opening process, the cinema projector lens is ensured to push the shielding plates (44a) to be opened smoothly, the shielding plates (44a) are prevented from colliding with the cinema projector lens, when the four shielding plates (44a) are all opened, the cinema projector lens is exposed, projection can be carried out, otherwise, after the four shielding plates (44a) are closed, the four shielding plates (44a) are closely adsorbed by the magnetic sheets (44b) between the shielding plates (44a), the sealing performance between the shielding plates (44a) is improved, and dust is prevented from contacting with the cinema projector lens;
the cinema projector lens is exposed, the connecting pipe (352) is driven to displace outside the cinema projector lens by the contraction of the telescopic hose (351), the clamping sheet (53e) and the outer surface of the lens are ensured to be in collision buffer by the elastic extrusion of the fixed rod (53a) and the spring (53b) in the displacement process, the outer surface of the lens is prevented from being damaged, meanwhile, the clamping sheet (53e) rotates slightly on the hinged sheet (53c) around the connecting shaft (53d), the roller (e2) assists in sliding, the outer surface of the lens is ensured to slide stably on the clamping sheet (53e), the cinema projector lens is exposed, the exposed cinema projector lens is rotated and adjusted in focal length, after the focal length is adjusted, the cinema projector lens is fixed after the rotary focal length is adjusted by the clamping of the clamping strip (e1), the focal length of the lens of the cinema projector is prevented from changing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110202068.8A CN112764299B (en) | 2021-02-23 | 2021-02-23 | Dustproof equipment for lens of cinema projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110202068.8A CN112764299B (en) | 2021-02-23 | 2021-02-23 | Dustproof equipment for lens of cinema projector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112764299A CN112764299A (en) | 2021-05-07 |
| CN112764299B true CN112764299B (en) | 2022-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110202068.8A Expired - Fee Related CN112764299B (en) | 2021-02-23 | 2021-02-23 | Dustproof equipment for lens of cinema projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112764299B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000305175A (en) * | 1999-04-20 | 2000-11-02 | Fujitsu General Ltd | Liquid crystal projector device |
| CN207601486U (en) * | 2017-12-15 | 2018-07-10 | 深圳市中科创激光技术有限公司 | Projector dirt seal housing and projector |
| CN210958459U (en) * | 2019-08-21 | 2020-07-07 | 北京易华录国际技术有限公司 | Dustproof protective cover for camera |
| CN212305399U (en) * | 2020-07-30 | 2021-01-05 | 陈俊宇 | Mobile phone with Barde film optical filter |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4914077B2 (en) * | 2006-02-07 | 2012-04-11 | キヤノン株式会社 | Projection type image display device |
| CN206946067U (en) * | 2017-06-09 | 2018-01-30 | 广州涉川科技有限公司 | A kind of optical lens module for bar code identification |
| CN208588888U (en) * | 2018-08-20 | 2019-03-08 | 中山新鑫光电有限公司 | A kind of zoom lens with dustproof construction |
| CN212410940U (en) * | 2020-05-29 | 2021-01-26 | 福州蓝达光电有限公司 | Cylindrical mirror projection lens |
-
2021
- 2021-02-23 CN CN202110202068.8A patent/CN112764299B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000305175A (en) * | 1999-04-20 | 2000-11-02 | Fujitsu General Ltd | Liquid crystal projector device |
| CN207601486U (en) * | 2017-12-15 | 2018-07-10 | 深圳市中科创激光技术有限公司 | Projector dirt seal housing and projector |
| CN210958459U (en) * | 2019-08-21 | 2020-07-07 | 北京易华录国际技术有限公司 | Dustproof protective cover for camera |
| CN212305399U (en) * | 2020-07-30 | 2021-01-05 | 陈俊宇 | Mobile phone with Barde film optical filter |
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| CN112764299A (en) | 2021-05-07 |
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