Projection device

By introducing a cleaning unit of a rotating structure and a transmission structure into the projection device, the lens is automatically cleaned, which solves the problem of degradation of projection effect caused by dust accumulation of the projector and simplifies the use process.

CN120507935APending Publication Date: 2025-08-19JIANGXI INST OF FASHION TECH
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Patent Information

Application Number
CN202510861626.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-25
Publication Date
2025-08-19

AI Technical Summary

Technical Problem

Existing projectors are prone to accumulation of dust during use, resulting in a decrease in projection effect and staff need to manually wipe the lens, which causes inconvenience.

Method used

A projection device is designed, including a lens and a cleaning unit. The cleaning unit consists of a rotating structure, a transmission structure and a cleaning structure. Through the transmission structure, the cleaning structure is driven to move along the lens axis direction to automatically clean the lens.

Benefits of technology

It realizes automatic cleaning of the lens, improves projection effect, simplifies the use process, and reduces dependence on staff.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of projection equipment, and discloses a projection device which comprises a projection unit and a cleaning unit, the projection unit comprises a lens, and the lens is used for projection; the cleaning unit corresponds to the lens in position and is used for cleaning dust on the lens, the cleaning unit comprises a rotating structure, a transmission structure and a cleaning structure, and the rotating structure is connected with the cleaning structure through the transmission structure and is used for driving the cleaning structure to move in the direction perpendicular to the axis of the lens through the transmission structure; therefore, the lens is cleaned. By arranging the cleaning unit, rotation of the rotating structure in the cleaning unit drives the cleaning structure to move in the direction perpendicular to the axis of the lens through the transmission structure so as to clean the lens, so that the projection effect is improved, a worker does not need to carry about wiping work in the process, and the working efficiency is improved. And meanwhile, the lens is automatically wiped and cleaned through the cleaning unit, so that the technical effect of improving the use convenience of the projection device is achieved.
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Description

Technical Field

[0001] The present invention relates to the technical field of projection equipment, and in particular to a projection device. Background Art

[0002] As an interactive visual communication system based on multimodal situation recognition, projectors are widely used in various scenarios, such as education, commercial presentations, and entertainment. They present the desired information to users in the form of audio, video, and images. However, projectors tend to heat up during use, which can easily cause dust to stick to them, affecting the quality of the projected image and reducing the projection effect, hindering their widespread use.

[0003] Currently, workers manually clean the projector lens between uses, before and after each use to ensure the projector's projection quality. However, this process not only requires workers to carry around wiping tools but also requires manual wiping, which undoubtedly brings a lot of inconvenience to the use of the projector. Summary of the Invention

[0004] In view of this, the present invention provides a projection device to solve the problem of manually wiping the projector lens during use, before and after use, to ensure the projection effect of the projector. However, this process not only requires the staff to carry a wiping tool at all times, but also requires the staff to wipe it manually, which undoubtedly brings many inconveniences to the use of the projector.

[0005] The present invention provides a projection device, comprising:

[0006] A projection unit, comprising a lens, wherein the lens is used for projection;

[0007] A cleaning unit, whose position corresponds to the position of the lens, is used to clean the lens. The cleaning unit includes a rotating structure, a transmission structure and a cleaning structure. The rotating structure is connected to the cleaning structure through the transmission structure, and is used to drive the cleaning structure to move along an axial direction perpendicular to the lens through the transmission structure to clean the lens.

[0008] Beneficial effect: By setting up a cleaning unit, the rotation of the rotating structure in the cleaning unit drives the cleaning structure to move along the axis direction perpendicular to the lens through the transmission structure to clean the lens, thereby improving the projection effect. In this process, there is no need for staff to carry wiping work with them. At the same time, the lens is automatically wiped and cleaned by the cleaning unit, so as to achieve the technical effect of improving the ease of use of the projection device.

[0009] In an optional embodiment, the transmission structure includes:

[0010] a first rotating portion, one end of which is connected to the rotating structure and is configured to rotate along with the rotating structure;

[0011] a second rotating portion, one end of which is hinged to the other end of the first rotating portion and is configured to rotate along with the first rotating portion;

[0012] A connecting portion is connected to the other end of the second rotating portion, the connecting portion is slidably connected to the shell, and the connecting portion is connected to the cleaning structure, and is used to drive the cleaning structure to move along the axis direction perpendicular to the lens through the second rotating portion.

[0013] Beneficial effect: The first rotating part rotates along with the rotating structure, so that the first rotating part can drive the second rotating part to rotate in the accommodating cavity, and under the limitation of the shell, the second rotating part can drive the connecting part to move only along the axis direction perpendicular to the lens, so as to realize the cleaning operation of the lens.

[0014] In an optional embodiment, the projection device includes:

[0015] The housing includes a housing cavity for accommodating the projection unit and the cleaning unit.

[0016] Beneficial effect: By providing a shell to protect the projection unit and the cleaning unit, the technical effect of enhancing the protection of the projection unit and the cleaning unit is achieved.

[0017] In an optional embodiment, the transmission structure includes:

[0018] a first rotating portion, one end of which is connected to the rotating structure and is configured to rotate along with the rotating structure;

[0019] a second rotating portion, one end of which is rotatably connected to the other end of the first rotating portion and is configured to rotate along with the first rotating portion;

[0020] a connecting portion connected to the other end of the second rotating portion, the connecting portion being slidably connected to the housing, and the connecting portion being connected to the cleaning structure, and being used to drive the cleaning structure to move along an axis perpendicular to the lens;

[0021] And / or, a through hole is provided on the inner wall of the accommodating cavity corresponding to the position of the lens, so that the lens can project through the through hole.

[0022] Beneficial effect: The first rotating part rotates along with the rotating structure, so that the first rotating part can drive the second rotating part to rotate in the accommodating cavity. Under the limitation of the shell, the second rotating part can drive the connecting part to move only in the direction perpendicular to the axis of the lens, so as to achieve the cleaning operation of the lens.

[0023] By providing the through hole, the housing can be prevented from affecting the projection effect of the lens, thereby improving the projection effect of the projection device of the present invention.

[0024] In an optional embodiment, a groove perpendicular to the axis of the lens is provided on the inner wall of the accommodating cavity, and a protrusion adapted to fit in the groove is provided on the connecting portion, and the protrusion slides in the groove to form a sliding connection between the connecting portion and the housing;

[0025] And / or, the connecting portion is a slider, and a slide rail that cooperates with the slider is provided on the inner wall of the accommodating cavity, and the extension direction of the slide rail is perpendicular to the axis direction of the lens to form a sliding connection between the connecting portion and the shell.

[0026] In an optional embodiment, the lens has a first state in which it is disposed in the accommodating cavity, and a second state in which it passes through the accommodating cavity through the through hole, and the projection device includes:

[0027] The adjusting unit is arranged in the accommodating cavity and connected to the projection unit, and is used for adjusting the lens to move linearly along the axis direction of the lens to adjust the state of the lens.

[0028] Beneficial effect: By setting up the adjustment unit, the projection unit can be driven to move without manual operation to adjust the state of the lens, thereby avoiding the setting of the shell affecting the projection effect of the projection unit, thereby achieving the technical effect of improving the ease of use of the projection device and further improving the projection effect of the projection device.

[0029] In an optional embodiment, the adjustment unit includes:

[0030] a third rotating portion, disposed in the accommodating cavity;

[0031] a straight portion connected to the third rotating portion and further connected to the lens, and configured to move linearly along with the third rotating portion to adjust the state of the lens;

[0032] And / or, the projection device includes:

[0033] A limiting unit is provided in the accommodating cavity and on the projection unit and / or the adjustment unit, and is used to limit the movement direction of the lens.

[0034] Beneficial effect: The rotation of the third rotating part can drive the straight part to reciprocate along the axis direction of the lens, thereby adjusting the state of the lens;

[0035] By providing a limiting unit, the movement direction of the projection unit, that is, the movement direction of the lens, can be limited so that the lens only moves along its own axis, thereby achieving the technical effect of improving the reliability of lens state adjustment.

[0036] In an optional embodiment, the limiting unit includes:

[0037] A first limiting structure is provided in the accommodating cavity, wherein the first limiting structure is provided with a first limiting portion arranged in a direction parallel to the axis of the lens;

[0038] The second limiting structure is provided on the projection unit and / or the adjustment unit. The second limiting structure is slidably connected to the first limiting portion to limit the movement direction of the projection unit.

[0039] In an optional embodiment, the projection device includes:

[0040] The fixing unit is arranged outside the accommodating cavity, one end of the fixing unit is connected to the shell, and the other end of the fixing unit is used to connect to the to-be-connected component to fix the position of the shell.

[0041] Beneficial effect: By providing the fixing unit, the projection device can be fixed on the component to be connected, thereby achieving the technical effect of improving the position stability of the projection device.

[0042] In an optional embodiment, the fixing unit includes:

[0043] a connecting structure, one end of which is connected to the housing;

[0044] A fixing structure has one end connected to the other end of the connecting structure, and the other end of the fixing structure is used to fix the projection unit on the to-be-connected component.

[0045] Beneficial effect: By setting up a connecting structure and a fixing structure, the connecting structure can fix the fixing structure on the shell, so that the fixing structure can fix the projection unit on the part to be connected, and the structures of the connecting structure and the fixing structure are simple, thereby achieving the technical effect of improving the ease of manufacturing the projection device.

[0046] In an optional embodiment, one end of the fixing structure is rotatably connected to the other end of the connecting structure for adjusting the projection angle of the projection unit.

[0047] Beneficial effect: By limiting the fixed structure to be rotatably connected to the other end of the connecting structure, the lens angle can be adjusted, thereby achieving the technical effect of improving the ease of use of the projection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0049] Figure 1 Schematic diagram of the structure of the projection device of this embodiment;

[0050] Figure 2 is a cross-sectional view of the projection device of this embodiment;

[0051] Figure 3 for Figure 2 A partial enlarged schematic diagram;

[0052] Figure 4 for Figure 2 A partial enlarged schematic diagram of B in the figure.

[0053] Description of reference numerals:

[0054] 1. Projection unit; 101. Lens;

[0055] 2. Cleaning unit; 201. Rotating structure;

[0056] 202, transmission structure; 2021, first rotating part; 2022, second rotating part;

[0057] 2023, connecting portion; 2024, protrusion; 2025, hinge axis;

[0058] 203. Cleaning structure;

[0059] 3. Shell; 301. Groove;

[0060] 4. Adjustment unit; 401. Third rotating portion; 402. Straight portion; 403. Driving portion; 404. Second rotating member;

[0061] 5. Fixing unit; 501. Connecting structure; 5011. Bending portion;

[0062] 502, fixed structure;

[0063] 6. Sealing unit; 7. First rotating member; 8. Positioning unit;

[0064] 9. Limiting unit; 901. First limiting structure; 9011. First limiting portion;

[0065] 902. The second limiting structure. DETAILED DESCRIPTION

[0066] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0067] The following combination Figures 1 to 4 , describing embodiments of the present invention.

[0068] According to an embodiment of the present invention, there is provided a projection device, comprising:

[0069] The projection unit 1 includes a lens 101, and the lens 101 is used for projection;

[0070] The cleaning unit 2 is positioned corresponding to the position of the lens 101 and is used to clean the lens 101. The cleaning unit 2 includes a rotating structure 201, a transmission structure 202 and a cleaning structure 203. The rotating structure 201 is connected to the cleaning structure 203 through the transmission structure 202, and is used to drive the cleaning structure 203 to move along an axial direction perpendicular to the lens 101 through the transmission structure 202 to clean the lens 101.

[0071] In the projection device of this embodiment, a cleaning unit 2 is provided. The rotation of the rotating structure 201 in the cleaning unit 2 drives the cleaning structure 203 to move along the axis direction perpendicular to the lens 101 through the transmission structure 202 to clean the lens 101, thereby improving the projection effect. In this process, there is no need for staff to carry wiping work with them. At the same time, the cleaning unit 2 automatically wipes and cleans the lens 101, thereby achieving the technical effect of improving the ease of use of the projection device.

[0072] In this embodiment, the cleaning structure 203 is an electrostatic brush. Of course, in other embodiments, the type of the cleaning structure 203 is adjusted according to the design of the projection device. For example, the cleaning structure 203 is a scouring pad.

[0073] In addition, the direction perpendicular to the axis of the lens 101 refers to the direction parallel to the Figure 2 In the horizontal direction shown, the projection unit 1 is a projector.

[0074] In addition, combined Figures 1 to 4As shown, the projection device includes:

[0075] The housing 3 includes a receiving cavity for receiving the projection unit 1 and the cleaning unit 2 to protect the projection unit 1 and the cleaning unit 2 , thereby achieving a technical effect of enhancing the protection of the projection unit 1 and the cleaning unit 2 .

[0076] The housing 3 is provided with a card slot, and the projection device includes a card that engages with the card slot. When the projection device is in normal use, the card engages with the card slot. When the projection unit 1 and cleaning unit 2 need to be repaired or replaced, the card is removed, exposing the projection unit 1 and cleaning unit 2, making them easier to repair or replace. The card engagement technique is a mature technology and will not be elaborated on here.

[0077] As an alternative embodiment, the projection device may not include the housing 3 .

[0078] Of course, in other embodiments, depending on the design of the projection device, a card slot may be provided on the housing 3, with the card hingedly connected to the card slot. When the projection device is in normal use, the card covers the card slot. When the projection unit 1 and the cleaning unit 2 need to be repaired or replaced, the user drives the card away from the card slot around the hinged position, exposing the projection unit 1 and the cleaning unit 2, thereby facilitating repair and replacement of the projection unit 1 and the cleaning unit 2.

[0079] In addition, combined Figure 2 As shown, in this embodiment, the rotating structure 201 is a motor and is fixedly connected to the inner wall of the accommodating cavity, and the axis direction of the rotating structure 201 is parallel to Figure 2 The vertical direction shown is the movement of the transmission structure 202 driven electrically.

[0080] Preferably, the cleaning unit 2 includes a first rotating member 7, which is disposed between the rotating structure 201 and the transmission structure 202. The first rotating member 7 is a rotating shaft that serves as an extension of the motor shaft in the rotating structure 201, thereby reducing the length restriction of the motor shaft in the rotating structure 201, thereby achieving the technical effect of improving the ease of connection between the rotating structure 201 and the transmission structure 202. The specific connection method between the first rotating member 7 and the rotating structure 201 and between the first rotating member 7 and the transmission structure 202 is not limited and can be a fixed connection or a detachable connection, both of which fall within the scope of protection of the present invention.

[0081] As a convertible embodiment, the cleaning unit 2 may not include the first rotating member 7 , and the rotating structure 201 is directly connected to the transmission structure 202 .

[0082] Of course, in other embodiments, the type of the rotating structure 201 is adjusted according to the design of the projection device. For example, the rotating structure 201 is coordinated between a motor and a handwheel. The motor drives the handwheel to rotate, so that the handwheel can drive the transmission structure 202 to rotate, and further drive the first rotating member 7 to rotate around the axis direction of the rotating structure 201.

[0083] In other embodiments, the type of the first rotating member 7 may be adjusted according to the design of the projection device, for example, the first rotating member 7 may be a rod-shaped structure. Alternatively, the connection method between the rotating structure 201 and the inner wall of the accommodating chamber may be adjusted, for example, to a detachable connection. The specific detachable connection method is not limited herein.

[0084] In addition, combined Figure 2 As shown, in this embodiment, the transmission structure 202 includes:

[0085] A first rotating portion 2021 , one end of which is connected to the rotating structure 201 and is configured to rotate along with the rotating structure 201 ;

[0086] The second rotating portion 2022 has one end rotatably connected to the other end of the first rotating portion 2021 and is configured to rotate along with the first rotating portion 2021;

[0087] The connecting portion 2023 is connected to the other end of the second rotating portion 2022, the connecting portion 2023 is slidably connected to the shell 3, and the connecting portion 2023 is connected to the cleaning structure 203, and is used to drive the cleaning structure 203 to move along the axis direction perpendicular to the lens 101 through the second rotating portion 2022.

[0088] In this embodiment, both the first rotating portion 2021 and the second rotating portion 2022 are rod-shaped structures, with the first rotating portion 2021 fixedly connected to the rotating structure 201. The first rotating portion 2021 is rotatably connected to the second rotating portion 2022 via a hinge shaft 2025. The second rotating portion 2022 is sleeved onto and fixedly connected to the connecting portion 2023, thereby achieving the technical effect of improving the connection stability between the first rotating portion 2021 and the rotating structure 201, and between the second rotating portion 2022 and the connecting portion 2023.

[0089] By rotating the first rotating part 2021 along with the rotating structure 201, the first rotating part 2021 can drive the second rotating part 2022 to rotate in the accommodating cavity, and under the limitation of the shell 3, the second rotating part 2022 can drive the connecting part 2023 to move only along the axial direction perpendicular to the lens 101, so as to realize the cleaning operation of the lens 101.

[0090] Of course, in other embodiments, depending on the design of the projection device, the specific type of transmission structure 202 can also be adjusted. For example, the transmission structure 202 can be a gear and rack structure. By driving the rotation of the gear through the rotating structure 201, the cleaning structure 203 can also be driven by the rack to move in a direction perpendicular to the axis of the lens 101. Compared to other embodiments in which the gear needs to rotate one tooth angle at a time to drive the linear motion of the rack, the rotation angle of the rotating structure 201 in this embodiment can be any angle. Therefore, in this embodiment, the rotating structure 201 drives the movement of the connecting portion 2023 with greater precision and a greater length of linear motion, thereby achieving the technical effect of improving the reliability of the projection device.

[0091] In other embodiments, depending on the design of the projection device, the shapes and specific structures of the first rotating portion 2021, the second rotating portion 2022, and the third rotating portion 401 may be adjusted. Furthermore, the connection between the first rotating portion 2021 and the second rotating portion 2022, the rotational connection between the first rotating portion 2021 and the rotating structure 201, and the connection between the second rotating portion 2022 and the connecting portion 2023 may also be adjusted. For example, a detachable connection between the first rotating portion 2021 and the rotating structure 201, and a detachable connection between the second rotating portion 2022 and the connecting portion 2023 are all within the scope of protection of the present invention.

[0092] In addition, combined Figure 2 As shown, in this embodiment, a groove 301 perpendicular to the axis of the lens 101 is provided on the inner wall of the accommodating cavity, that is, the length direction of the groove 301 is parallel to the axis of the lens 101. Figure 2 The connecting portion 2023 is provided with a protrusion 2024 adapted to the groove 301 , and the protrusion 2024 slides in the groove 301 to form a sliding connection between the connecting portion 2023 and the housing 3 .

[0093] Specifically, combined Figure 2 and Figure 3 As shown, in this embodiment, a positioning unit 8 is provided in the accommodating cavity, and a groove 301 is provided on the positioning unit 8, that is, the groove 301 makes the positioning unit 8 "mouth" shaped, and an accommodating groove perpendicular to the axis direction of the lens 101 is provided on the top surface of the positioning unit 8, that is, the accommodating groove is along the Figure 2 301, and is used to accommodate the connecting portion 2023. A protrusion 2024 is provided at the bottom of the connecting portion 2023, and the protrusion 2024 is disposed in the groove 301. The connecting portion 2023 is disposed in the accommodating groove. Under the limitation of the groove 301, the cleaning unit 2 is driven by the connecting portion 2023 to move only in a direction perpendicular to the axis of the lens 101, thereby limiting the movement direction of the connecting portion 2023 and the cleaning unit 2, thereby achieving the technical effect of improving the reliability of the cleaning unit 2 in cleaning the lens 101.

[0094] As a convertible embodiment, the connecting part 2023 may be a slider, and a slide rail matching the slider is provided on the inner wall of the accommodating cavity, and the extension direction of the slide rail is perpendicular to the axial direction of the lens 101 to form a sliding connection between the connecting part 2023 and the shell 3.

[0095] Of course, in other embodiments, depending on the design of the projection device, the protrusion 2024 is not provided on the connecting portion 2023. In this case, the connecting portion 2023 is along the Figure 2 The bottom of the device serves as the protrusion 2024, or the connecting portion 2023 serves as both the protrusion 2024 and the slider, both of which are within the scope of protection of the present invention.

[0096] As a convertible embodiment, the positioning unit 8 may not be provided in the accommodating cavity, and the groove 301 may be directly provided on the housing 3 , which is within the protection scope of the present invention.

[0097] In addition, in this embodiment, a through hole is provided on the inner wall of the accommodating cavity corresponding to the position of the lens 101, so that the lens 101 can project through the through hole. Based on this, it is possible to prevent the configuration of the housing 3 from affecting the projection effect of the lens 101, thereby improving the projection effect of the projection device of the present invention.

[0098] Furthermore, the lens 101 has a first state in which it is disposed in the accommodating cavity, and a second state in which it is positioned outside the accommodating cavity. The projection device includes:

[0099] The adjustment unit 4 is disposed in the accommodating cavity and connected to the projection unit 1 , and is used to adjust the lens 101 to perform linear motion along the axis direction of the lens 101 to adjust the state of the lens 101 .

[0100] By providing the adjustment unit 4, the projection unit 1 can be driven to move without manual operation to adjust the state of the lens 101, thereby preventing the setting of the shell 3 from affecting the projection effect of the projection unit 1, thereby achieving the technical effect of improving the ease of use of the projection device and further improving the projection effect of the projection device.

[0101] As an alternative embodiment, the projection device may not include the adjustment unit 4 .

[0102] Of course, in other embodiments, depending on the design of the projection device, the housing 3 may be made of a transparent material. In this case, there is no need to provide a through hole, and the lens 101 can also perform projection through the through hole.

[0103] In other embodiments, depending on the design of the projection device, only the specific structural arrangement of the transmission structure 202 may be limited, or only the inner wall of the accommodating cavity may be limited to have through holes, which are all within the protection scope of the present invention.

[0104] In addition, combined Figure 2 As shown, in this embodiment, the adjustment unit 4 includes:

[0105] The third rotating part 401 is disposed in the accommodating cavity;

[0106] The straight portion 402 is connected to the third rotating portion 401 , and is also connected to the lens 101 , and is configured to perform a linear motion along with the third rotating portion 401 to adjust the state of the lens 101 .

[0107] Among them, the third rotating part 401 can be a gear, and the straight part 402 can be a rack. The rotation of the third rotating part 401 can drive the straight part 402 to reciprocate along the axial direction of the lens 101, thereby adjusting the state of the lens 101. The structure of the gear and rack is simple and easy to obtain, thereby achieving the technical effect of improving the simplicity of manufacturing the projection device.

[0108] Preferably, combined Figure 2 As shown, the adjustment unit 4 includes:

[0109] The driving unit 403 is disposed within the accommodating cavity. The driving unit 403 is coaxially arranged with the third rotating unit 401 via the second rotating member 404. The driving unit 403 drives the third rotating unit 401 to rotate about its own axis via the second rotating member 404. For example, the driving unit 403 may be a motor. As an alternative embodiment, the driving unit 403 may also be a handwheel.

[0110] The second rotating member 404 can increase the length of the driving portion 403 , thereby reducing the restriction of the adjusting unit 4 on the length of the driving portion 403 , thereby achieving the technical effect of improving the structural simplicity of the adjusting unit 4 .

[0111] As a convertible embodiment, the second rotating member 404 may not be provided, and the driving unit 403 may directly drive the third rotating unit 401 to perform a rotation operation.

[0112] Of course, in other embodiments, the structure of the adjustment unit 4 may be adjusted depending on the design of the projection device. For example, the adjustment unit 4 may not include the driving portion 403, and the third rotating portion 401 may be manually driven to achieve the movement of the linear portion 402. Furthermore, in other embodiments, the specific structures of the third rotating portion 401 and the linear portion 402 may be adjusted depending on the design of the projection device. For example, the third rotating portion 401 and the linear portion 402 may be a crank slider mechanism.

[0113] In addition, combined Figure 2 As shown, in this embodiment, the projection device includes:

[0114] The limiting unit 9 is provided in the accommodating cavity and on the projection unit 1 , and is used to limit the movement direction of the projection unit 1 .

[0115] By providing the limiting unit 9 , the movement direction of the projection unit 1 , that is, the movement direction of the lens 101 , can be limited so that the lens 101 only moves along its own axis, thereby achieving the technical effect of improving the reliability of the state adjustment of the lens 101 .

[0116] The limiting unit 9 includes:

[0117] A first limiting structure 901 is disposed in the accommodating cavity. The first limiting structure 901 is provided with a first limiting portion 9011 . The first limiting portion 9011 is arranged in a direction parallel to the axis of the lens 101 .

[0118] The second limiting structure 902 is provided on the projection unit 1 , and is slidably connected to the first limiting portion 9011 to limit the movement direction of the projection unit 1 , ie, the lens 101 .

[0119] Among them, the first limiting part 9011 can be a "T"-shaped limiting groove, and the second limiting structure 902 can be a "T"-shaped limiting block. Through the cooperation between the limiting block and the limiting groove, the second limiting structure 902 and the first limiting part 9011 are slidingly connected to limit the movement direction of the lens 101, and the structure of the limiting block and the limiting groove is simple, which can achieve the technical effect of improving the structural simplicity of the projection device.

[0120] As an alternative embodiment, the shapes of the first limiting portion 9011 and the second limiting structure 902 may be adjusted, or the first limiting portion 9011 may be a limiting block and the second limiting structure 902 may be a limiting groove, all of which are within the scope of protection of the present invention. Furthermore, the second limiting structure 902 may be provided on the adjustment unit 4, or the second limiting structure 902 may be provided on both the projection unit 1 and the adjustment unit 4, all of which are within the scope of protection of the present invention.

[0121] Of course, in other embodiments, depending on the design of the projection device, the second limiting structure 902 is provided on the straight portion 402 of the adjustment unit 4, in which case the limiting unit 9 is slidably connected to the adjustment unit 4. Alternatively, the second limiting structure 902 is provided on the straight portion 402 of the adjustment unit 4 and also on the projection unit 1, in which case the limiting unit 9 is slidably connected to both the adjustment unit 4 and the projection unit 1.

[0122] In other embodiments, depending on the design of the projection device, the projection device does not include the limiting unit 9. Alternatively, only the specific structure of the adjustment unit 4 or only the projection device including the limiting unit 9 is limited, all of which are within the scope of protection of the present invention.

[0123] Meanwhile, in other embodiments, the structure of the limiting unit 9 is adjusted according to different designs of the projection device. For example, the limiting unit 9 is a linear guide rail.

[0124] In other embodiments, depending on the design of the projection device, the limiting unit 9 can be provided on the adjustment unit 4, specifically on the straight portion 402, that is, the second limiting structure 902 is provided on the straight portion 402, and the groove 301 is provided on the inner wall of the accommodating cavity. Alternatively, the second limiting structure 902 can be provided on both the projection unit 1 and the straight portion 402, all of which are within the scope of protection of the present invention.

[0125] In addition, combined Figure 1 and Figure 2 As shown, in this embodiment, the projection device includes:

[0126] The fixing unit 5 is provided outside the accommodating cavity, one end of the fixing unit 5 is connected to the housing 3, and the other end of the fixing unit 5 is used to connect to the object to be connected, so as to fix the position of the housing 3. The object to be connected can be a wall.

[0127] The fixing unit 5 is connected to the projection unit 1 through the connection with the housing 3 .

[0128] By providing the fixing unit 5, the projection device can be fixed on the component to be connected, thereby achieving the technical effect of improving the position stability of the projection device.

[0129] As a convertible embodiment, the member to be connected may be other fixed structures, and as long as the position of the projection device can be fixed, it is within the scope of protection of the present invention.

[0130] Specifically, combined Figure 2 As shown, the fixing unit 5 includes:

[0131] A connecting structure 501, one end of which is connected to the housing 3;

[0132] One end of the fixing structure 502 is connected to the other end of the connecting structure 501 , and the other end of the fixing structure 502 is used to fix the projection unit 1 on the component to be connected.

[0133] Among them, the connecting structure 501 is a rod-shaped structure, the fixing structure 502 is a sheet-shaped structure with a hole, and the part to be connected is provided with a threaded hole. The bolt passes through the hole of the sheet-shaped structure and is threadedly connected to the part to be connected to achieve the fixation of the position between the projection device and the part to be connected.

[0134] By providing the connecting structure 501 and the fixing structure 502, the connecting structure 501 can fix the fixing structure 502 on the housing 3, so that the fixing structure 502 can fix the projection unit 1 on the part to be connected, and the structures of the connecting structure 501 and the fixing structure 502 are simple, thereby achieving the technical effect of improving the ease of manufacturing the projection device.

[0135] Specifically, the connecting structure 501 is detachably connected to the shell 3. For example, a fixing plate is provided on the connecting structure 501, a through hole is provided on the shell 3, and a threaded hole is provided on the shell 3. Bolts are passed through the through hole and threadedly connected to the threaded hole to form a detachable connection between the connecting structure 501 and the shell 3.

[0136] Preferably, the connecting structure 501 has three bending parts 5011, and the fixing structure 502 is provided at Figure 2 Above the middle shell 3, one end of the connecting structure 501 is connected to Figure 2 The fixing structure 502 above the middle shell 3 is connected, and when three bending parts 5011 are provided, the other end of the connecting structure 501 can be connected to the fixing structure 502 above the middle shell 3. Figure 2 Based on this, the installation position of the fixing structure 502 can be located on a side other than the side of the housing 3 where the connecting structure 501 is installed on the housing 3, and there is no need to limit the installation position of the fixing structure 502, thereby achieving the technical effect of improving the installation convenience of the projection device.

[0137] Furthermore, one end of the fixed structure 502 is rotatably connected to the other end of the connecting structure 501. For example, a threaded hole is provided on the fixed structure 502, and a thread is provided on the connecting structure 501. The angle of the lens 101 can be adjusted through the threaded connection between the thread and the threaded hole, thereby achieving the technical effect of improving the ease of use of the projection device.

[0138] Of course, in other embodiments, depending on the design of the projection device, the specific types of the connecting structure 501 and the fixing structure 502 may be adjusted. Alternatively, the number of the bent portions 5011 may be adjusted, or the connection method between the connecting structure 501 and the housing 3, between the connecting structure 501 and the fixing structure 502, and between the fixing structure 502 and the connected component may be adjusted. This may be a detachable connection method or a fixed connection method.

[0139] Meanwhile, in other embodiments, depending on the design of the projection device, the projection device may not include the fixing unit 5. Alternatively, the rotational connection between the fixing structure 502 and the connecting structure 501 may be adjusted, for example, the fixing structure 502 may be rotationally connected to the connecting structure 501 via a rotating disk.

[0140] In other embodiments, the shape of the connecting structure 501 and the shape of the fixing structure 502 are adjusted according to different designs of the projection device.

[0141] In addition, combined Figure 1 As shown, in this embodiment, the projection device includes a sealing unit 6, which is detachably connected to the through hole.

[0142] The dimensions of the sealing unit 6 and the through-hole correspond to the radial dimensions of the lens 101. That is, if the lens 101 is circular, the sealing unit 6 and the through-hole are also circular. When the projection device is not in use, the sealing unit 6 is connected to the through-hole to seal the through-hole and protect the lens 101. When the projection device is needed, the sealing unit 6 can be removed, thereby achieving the technical effect of enhancing the protection of the projection device. For example, the sealing unit 6 and the housing 3 are threadedly connected. As an alternative embodiment, the sealing unit 6 and the housing 3 can also be plug-in connected, which is within the scope of protection of the present invention.

[0143] In addition, the sealing unit 6 is provided with a protrusion 2024, which facilitates the user to rotate the sealing unit 6 via the protrusion 2024, thereby achieving the technical effect of improving the ease of assembly and disassembly of the sealing unit 6. As an alternative embodiment, the sealing unit 6 may also be provided with no protrusion 2024.

[0144] Furthermore, the sealing unit 6 can be made of rubber. Of course, in other embodiments, the material of the sealing unit 6 can be adjusted according to the design of the projection device, provided that it does not damage the lens 101, and all such adjustments are within the scope of protection of the present invention. Alternatively, the shape of the lens 101, the sealing unit 6, or the through hole can be adjusted.

[0145] As an alternative embodiment, the projection device may not include the sealing unit 6 .

[0146] Of course, in other embodiments, the size of the sealing unit 6 is adjusted according to the design of the projection device, or the detachable connection between the sealing unit 6 and the housing 3 is adjusted.

[0147] The specific working process of the projection device of this embodiment is as follows:

[0148] The projection device is fixed to the component to be connected by the fixing unit 5. When the projection device is required to perform projection operation, the sealing unit 6 is opened and the lens 101 is driven to the second state of passing through the through hole to the outside of the accommodating cavity by the adjustment unit 4 for projection.

[0149] When the lens 101 needs to be cleaned, the lens 101 is driven into the accommodating cavity through the adjustment unit 4, so that the lens 101 is in the first state, and then the lens 101 is cleaned by the cleaning unit 2. After cleaning, the lens 101 is driven through the through hole to the outside of the accommodating cavity through the adjustment unit 4 to continue the projection operation.

[0150] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A projection device, characterized in that: include: A projection unit (1) includes a lens (101), wherein the lens (101) is used for projection; A cleaning unit (2) is located at a position corresponding to the position of the lens (101) and is used to clean the lens (101). The cleaning unit (2) comprises a rotating structure (201), a transmission structure (202) and a cleaning structure (203). The rotating structure (201) is connected to the cleaning structure (203) via the transmission structure (202) and is used to drive the cleaning structure (203) to move along an axial direction perpendicular to the lens (101) via the transmission structure (202) to clean the lens (101).

2. The projection device according to claim 1, wherein: The projection device comprises: The housing (3) comprises a housing cavity, wherein the housing cavity is used to accommodate the projection unit (1) and the cleaning unit (2).

3. The projection device according to claim 2, wherein: The transmission structure (202) comprises: A first rotating portion (2021), one end of which is connected to the rotating structure (201) and is configured to rotate along with the rotating structure (201); a second rotating portion (2022), one end of which is rotatably connected to the other end of the first rotating portion (2021) and is configured to rotate along with the first rotating portion (2021); a connecting portion (2023) connected to the other end of the second rotating portion (2022), the connecting portion (2023) being slidably connected to the housing (3), and the connecting portion (2023) being connected to the cleaning structure (203) for driving the cleaning structure (203) to move along an axial direction perpendicular to the lens (101); And / or, a through hole is provided on the inner wall of the accommodating cavity corresponding to the position of the lens (101), so that the lens (101) can project through the through hole.

4. The projection device according to claim 3, wherein: A groove (301) perpendicular to the axis of the lens (101) is provided on the inner wall of the accommodating cavity, and a protrusion (2024) adapted to the groove (301) is provided on the connecting portion (2023), and the protrusion (2024) slides in the groove (301) to form a sliding connection between the connecting portion (2023) and the housing (3); And / or, the connecting portion (2023) is a slider, and a slide rail that matches the slider is provided on the inner wall of the accommodating cavity, and the extension direction of the slide rail is perpendicular to the axial direction of the lens (101) to form a sliding connection between the connecting portion (2023) and the housing (3).

5. The projection device according to claim 3 or 4, characterized in that: The lens (101) has a first state in which it is arranged in the accommodating cavity, and a second state in which it passes through the accommodating cavity through the through hole. The projection device comprises: An adjustment unit (4) is provided in the accommodating cavity and connected to the projection unit (1), and is used for adjusting the lens (101) to perform linear motion along the axis direction of the lens (101) to adjust the state of the lens (101).

6. The projection device according to claim 5, characterized in that The regulating unit (4) comprises: A third rotating part (401) is provided in the accommodating cavity; a straight portion (402) connected to the third rotating portion (401), and the straight portion (402) is also connected to the lens (101), and is used to perform linear motion along with the third rotating portion (401) to adjust the state of the lens (101); And / or, the projection device includes: A limiting unit (9) is provided in the accommodating cavity and on the projection unit (1) and / or the adjustment unit (4), and is used to limit the movement direction of the lens (101).

7. The projection device according to claim 6, wherein: The limiting unit (9) comprises: A first limiting structure (901) is provided in the accommodating cavity, wherein the first limiting structure (901) is provided with a first limiting portion (9011) arranged along an axial direction parallel to the lens (101); A second limiting structure (902) is provided on the projection unit (1) and / or the adjustment unit (4), and the second limiting structure (902) is slidably connected to the first limiting portion (9011) to limit the movement direction of the projection unit (1).

8. The projection device according to any one of claims 2 to 4, 6 and 7, characterized in that: The projection device comprises: A fixing unit (5) is provided outside the accommodating cavity, one end of the fixing unit (5) is connected to the shell (3), and the other end of the fixing unit (5) is used to connect to a component to be connected, so as to fix the position of the shell (3).

9. The projection device according to claim 8, wherein: The fixing unit (5) comprises: A connecting structure (501), one end of which is connected to the housing (3); A fixing structure (502) has one end connected to the other end of the connecting structure (501), and the other end of the fixing structure (502) is used to fix the projection unit (1) on the component to be connected.

10. The projection device according to claim 9, wherein: One end of the fixed structure (502) is rotatably connected to the other end of the connecting structure (501) for adjusting the projection angle of the projection unit (1).