Projection device

Abstract

The embodiment of the utility model provides projection equipment, relates to the technical field of projection, and aims to solve the technical problem of poor sealing performance of projection equipment in related technologies. The projection equipment comprises a shell, and the shell comprises a front shell which is provided with a communication port; an accommodating cavity is defined by the rear shell and the front shell; the cover plate assembly is arranged at the communication port, and the cover plate assembly is provided with a movable port facing the rear shell; the lens assembly comprises a lens cone which is arranged on one side, close to the rear shell, of the lens assembly; the lens cone is movably arranged in the accommodating cavity so as to be close to or far away from the communication port; the lens is positioned on the inner side of the lens barrel and is opposite to the communication port; the dustproof frame is arranged on the outer side of the lens cone; a gap is formed between the dustproof frame and the cover plate assembly; the dustproof piece is at least partially filled in the gap; the first end of the dustproof piece is arranged on the dustproof frame, and the second end of the dustproof piece can stretch out and draw back in the direction close to or away from the dustproof frame and abuts against the inner wall of the movable opening. The projection equipment can improve the sealing performance and ensure the quality of a projection picture.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of projection technology, in particular to a projection device. BACKGROUND

[0002] The projection device is a device capable of projecting an image or a video signal onto a screen or a curtain, and plays an important role in many fields.

[0003] The projection device includes a housing, a lens assembly, and a cover plate assembly. The lens assembly is disposed in the housing near one side of the rear shell, and the cover plate assembly is mounted on the front shell of the housing and can modify the lens assembly. In order to prevent dust from entering the lens assembly from the gap between the cover plate assembly and the front shell, the projection device further includes a dust ring. One side of the dust ring is crimped with the cover plate assembly, and the other side is sleeved on the lens barrel of the lens assembly.

[0004] When the lens assembly can move in the front-rear direction, the shorter width of the dust ring sleeved on the lens barrel allows dust to enter the lens assembly, resulting in poor sealing of the projection device and blurred projection image. UTILITY MODEL CONTENT

[0005] Embodiments of the present application provide a projection device, which can solve the technical problem of poor sealing of the projection device.

[0006] In a first aspect, embodiments of the present application provide a projection device, comprising:

[0007] The housing includes:

[0008] The front shell is provided with a communication port;

[0009] The rear shell surrounds the accommodation cavity with the front shell;

[0010] The cover plate assembly is disposed in the communication port, and the cover plate assembly is provided with a movable port facing the rear shell;

[0011] The lens assembly includes:

[0012] The lens barrel is disposed on one side of the lens assembly near the rear shell; the lens barrel is movably disposed in the accommodation cavity to approach or move away from the communication port;

[0013] The lens is located on the inner side of the lens barrel and opposite the communication port;

[0014] The dust frame is disposed on the outer side of the lens barrel; the dust frame forms a gap with the cover plate assembly;

[0015] The dust piece is at least partially filled in the gap; the first end of the dust piece is disposed on the dust frame, the second end of the dust piece is telescopic in the direction of approaching or moving away from the dust frame, and the second end of the dust piece abuts against the inner wall of the movable port.

[0016] The first end of the dustproof piece is arranged on the dustproof frame, the second end of the dustproof piece is telescopic along the direction close to or away from the first end of the dustproof piece, and the second end of the dustproof piece can abut against the inner wall of the movable port. When the lens barrel moves, the dustproof piece can be deformed to adapt to the gap change, preventing dust from spreading from the movable port to the side away from the movable port in the accommodation cavity. The dustproof piece can block the gap between the dustproof frame and the cover plate assembly, preventing dust from entering the lens assembly, thereby avoiding the blur of the projected image. In this way, the sealing performance of the projection device can be improved, and the stability of the projection quality can be ensured.

[0017] In some embodiments of the present application, when the lens barrel approaches the communication port, the outer surface of the dustproof frame can be inserted into the movable port;

[0018] The dustproof piece is arranged as a ring-shaped dustproof piece; the inner side of the ring-shaped dustproof piece is sleeved on the outer surface of the dustproof frame, and the outer side of the ring-shaped dustproof piece abuts against the inner wall of the movable port.

[0019] In this way, the dustproof frame and the cover plate assembly can be prevented from interfering or colliding, thereby ensuring the reliability of the lens assembly and the cover plate assembly. The ring-shaped dustproof piece can improve the uniformity of its contact with the dustproof frame and the movable port, and strengthen the sealing effect of the projection device.

[0020] In some embodiments of the present application, the dustproof frame is provided with a limiting portion protruding from the outer surface of the dustproof frame;

[0021] The surface of the limiting portion facing the communication port abuts against the surface of the ring-shaped dustproof piece away from the communication port.

[0022] In this way, the ring-shaped dustproof piece can be prevented from moving away from the communication port by the limiting portion, so that the ring-shaped dustproof piece cannot fill the gap, affecting the sealing performance of the projection device.

[0023] In some embodiments of the present application, the dustproof piece is arranged as an elastic dustproof piece, and the elastic dustproof piece is in a compressed state; the inner wall of the dustproof frame and the movable port jointly apply a pressing force to the elastic dustproof piece.

[0024] In this way, the elastic dustproof piece can be deformed, which can adapt to dustproof frames and movable ports of different sizes and shapes, improve the adhesion to the inner wall of the dustproof frame and the movable port, prevent dust and impurities from entering the lens assembly, and thereby improve the sealing effect of the projection device.

[0025] In some embodiments of the present application, the thickness of the dustproof piece is 4-6mm in the moving direction of the lens barrel.

[0026] In this way, the dustproof member occupies less space, the volume of the projection device is reduced, and the portability of the projection device is improved. In addition, when the lens barrel drives the dustproof frame to move away from the cover assembly, the dustproof member is stretched, preventing the second end of the dustproof member from being separated from the inner wall of the movable port, thereby preventing dust from entering the lens assembly.

[0027] In some embodiments of the present application, the cover assembly comprises a fixing ring, which is detachably arranged on the front shell.

[0028] In this way, the fixing ring can be easily disassembled, cleaned, or replaced.

[0029] In some embodiments of the present application, the fixing ring is provided with at least one protrusion.

[0030] The surface of the front shell facing the rear shell is provided with at least one elastic clamping portion, which is arranged on the periphery of the communication port.

[0031] The fixing ring is arranged on the communication port, and the protrusion is located on the side of the fixing ring facing the rear shell. The protrusion is clamped with the elastic clamping portion.

[0032] And / or, the outer surface of the fixing ring is provided with at least one insertion slot, and the slot of the insertion slot is away from the axis of the fixing ring. The insertion slot is inserted with the front shell.

[0033] In this way, the protrusion and the elastic clamping portion cooperate to facilitate the installation of the fixing ring and improve the assembly efficiency of the fixing ring.

[0034] In some embodiments of the present application, the inside of the fixing ring is provided with a ring groove, and the groove bottom of the ring groove faces the lens assembly.

[0035] The cover assembly comprises a transparent cover plate arranged in the ring groove, and the transparent cover plate abuts against the groove bottom of the ring groove.

[0036] In this way, in the direction of the front shell outside the projection device, the edge of the transparent cover plate and the ring edge of the ring groove do not have a gap, which can improve the appearance of the projection device.

[0037] In some embodiments of the present application, the dustproof frame is provided with a limiting portion protruding from the outer surface of the dustproof frame.

[0038] The cover assembly further comprises a compression ring, which at least partially extends into the ring groove, and the side of the compression ring away from the lens barrel is pressed against the transparent cover plate.

[0039] The gap comprises a first gap and a second gap, the first gap is located between the dustproof frame and the inner wall of the movable port, and the second gap is located between the compression ring and the limiting portion.

[0040] In this way, the transparent cover plate is defined by the compression ring, so that the existence of residual glue around the transparent cover plate is avoided, and the appearance of the projection device is not affected.

[0041] In a second aspect, the embodiments of the present application provide a projection device, comprising:

[0042] A housing, the housing comprising:

[0043] A front shell, provided with a communication port;

[0044] A rear shell, surrounding the accommodation cavity with the front shell;

[0045] A cover plate assembly, arranged in the communication port, the cover plate assembly being provided with a movable port;

[0046] A lens assembly, comprising:

[0047] A lens barrel, movably arranged in the accommodation cavity to approach or move away from the communication port;

[0048] A lens, located on the inside of the lens barrel and opposite the cover plate assembly;

[0049] A dustproof frame, arranged on the outside of the lens barrel; the dustproof frame and the cover plate assembly form a gap therebetween;

[0050] A dustproof piece;

[0051] When the lens barrel drives the lens to approach or move away from the communication port, the dustproof piece deforms, and the dustproof piece seals the gap.

[0052] In this way, the first end of the dustproof piece is arranged in the dustproof frame, the second end of the dustproof piece is telescopic in the direction of approaching or moving away from the first end of the dustproof piece, and the second end of the dustproof piece can abut against the inner wall of the movable port. When the lens barrel moves, the dustproof piece can deform to adapt to the change of the gap, so that dust is prevented from spreading from the movable port to the side of the accommodation cavity away from the movable port. The dustproof piece can seal the gap between the dustproof frame and the cover plate assembly, so that dust is prevented from entering the lens assembly, and the projection picture is prevented from being blurred. In this way, the sealing performance of the projection device is improved, and the stability of the projection quality is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0053] In order to more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the drawings needed to be used in the embodiments or related art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0054] Figure 1 It is an exploded structural schematic view of the cover plate assembly in the related art;

[0055] Figure 2A structure diagram of a connection between a cover plate assembly and a front shell in the related art;

[0056] Figure 3 A front view of a connection between a cover plate assembly and a front shell in an embodiment of the present application;

[0057] Figure 4 An exploded view of a cover plate assembly in an embodiment of the present application;

[0058] Figure 5 A sectional view of a cover plate assembly in an embodiment of the present application;

[0059] Figure 6 A structure diagram of a connection between a cover plate assembly and a front shell in the related art; Figure 5 An enlarged view of a portion A in FIG. 1;

[0060] Figure 7 A structure diagram of a connection between a dustproof frame and a dustproof member in an embodiment of the present application;

[0061] Figure 8 A structure diagram of a fixing ring in an embodiment of the present application;

[0062] Figure 9 A structure diagram of a connection between a cover plate assembly and a front shell in the related art; Figure 8 A full sectional view of B-B in FIG. 1;

[0063] Figure 10 A structure diagram of a front shell in an embodiment of the present application;

[0064] Figure 11 A structure diagram of a connection between a cover plate assembly and a front shell in the related art; Figure 10 A full sectional view of C-C in FIG. 1;

[0065] Figure 12 A structure diagram of a connection between a cover plate assembly and a front shell in the related art; Figure 5 An enlarged view of a portion D in FIG. 1.

[0066] Explanation of reference numerals:

[0067] 110 - front shell; 111 - communication port; 112 - elastic clamping portion; 113 - screw;

[0068] 20 - cover plate assembly;

[0069] 200 - movable port;

[0070] 210 - fixing ring; 211 - protrusion; 212 - insertion slot; 213 - ring groove;

[0071] 220 - transparent cover plate;

[0072] 230 - compression ring;

[0073] 240 - transparent member;

[0074] 250 - transparent member fixing ring;

[0075] 260 - dust ring;

[0076] 270 - dust ring pressing plate;

[0077] 320 - lens;

[0078] 330 - dust frame;

[0079] 331 - limiting part;

[0080] 40 - dust piece;

[0081] H - dust piece thickness; L1 - first gap; L2 - second gap. DETAILED DESCRIPTION

[0082] As the background art, the projection device is a device capable of projecting an image or a video signal onto a screen or a curtain, and plays an important role in many fields.

[0083] Referring to Figure 1 and Figure 2 , the projection device includes a housing (not shown in the figure), a lens assembly (not shown in the figure), and a cover plate assembly 20. The lens assembly is disposed in the housing near one side of the rear shell, and the cover plate assembly 20 is installed on the front shell 110 of the housing and can modify the lens assembly. The cover plate assembly 20 includes a transparent piece 240, a transparent piece fixing ring 250, a dust ring 260, and a dust ring pressing plate 270. The transparent piece fixing ring 250 is installed on the front shell 110 through a fixing column on the front shell 110. The transparent piece 240 is attached to the side of the transparent piece fixing ring 250 away from the lens assembly by means of a back adhesive. The dust ring 260 is pressed against the side of the transparent piece fixing ring 250 close to the lens assembly through the dust ring pressing plate 270. The dust ring 260 can prevent dust from entering the lens assembly from the gap between the cover plate assembly 20 and the front shell 110. One side of the dust ring 260 is pressed against the cover plate assembly 20, and the other side is sleeved on the lens barrel of the lens assembly.

[0084] The lens assembly can move in the front-back direction, but the short width of the dust ring 260 sleeved on the lens barrel can cause dust to enter the lens assembly, resulting in poor sealing of the projection device and blurring of the projected image.

[0085] Therefore, the projection device provided by the embodiments of the present application is provided with a cover plate assembly arranged on the front shell through the communication opening, and a lens assembly is arranged in the accommodating cavity formed by the rear shell and the front shell. The lens barrel can move forward and backward to realize focusing or focusing adjustment of the projection device. The cover plate assembly is provided with a movable opening to prevent the lens assembly from interfering with the cover plate assembly. A dustproof frame is arranged outside the lens barrel, and a gap is formed between the dustproof frame and the cover plate assembly. A first end of the dustproof piece is arranged in the dustproof frame, a second end of the dustproof piece can be telescoped in a direction close to or away from the first end of the dustproof piece, and the second end of the dustproof piece can abut against the inner wall of the movable opening. When the lens barrel moves, the dustproof piece can be deformed to adapt to the change of the gap, so as to prevent dust from spreading from the movable opening to the side of the accommodating cavity away from the movable opening. The dustproof piece can block the gap between the dustproof frame and the cover plate assembly, so as to prevent dust from entering the lens assembly, thereby avoiding blurring of the projection picture. In this way, the sealing performance of the projection device can be improved, and the stability of the projection quality can be ensured.

[0086] In order to make the purpose, implementation and advantages of the present application clearer, the following will clearly and completely describe the exemplary implementation of the present application by combining the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application.

[0087] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the following described embodiments, and is not intended to limit the implementation of the present application. Unless otherwise stated, these terms should be understood according to their ordinary and general meanings.

[0088] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclusive inclusion, for example, a product or device including a series of components does not have to be limited to the clearly listed components, but can include other components not clearly listed or inherent to these products or devices.

[0089] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0090] The terms "first", "second", etc. are only used for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0091] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0092] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0093] The embodiments of the present application provide a projection device. The projection device can magnify and project image or video signals onto a screen through an optical system. For example, the projection device can be set as a laser projector. The laser projector uses laser as light source, which can have the characteristics of high brightness, wide color gamut and long service life, and can present more realistic picture effect.

[0094] The projection device can include a housing, which can protect the internal components. The housing can be made of a strong and light material, such as metal or plastic, to ensure the durability and portability of the projection device.

[0095] In combination with Figure 3 and Figure 4 As shown, the housing can include a front shell 110. The front shell 110 can be designed with a specific shape, color, texture or pattern to improve the aesthetics of the projection device. In addition, the front shell 110 is also provided with a communication port 111, which can install elements. For example, display screen, keys, appearance decoration elements and other elements can be arranged in the communication port 111.

[0096] The housing can include a rear shell. The front shell 110 and the rear shell can enclose an accommodation cavity, which can be used to accommodate various elements of the projection device.

[0097] The projection device can include a light source. The light source can provide illumination for the projection device.

[0098] The projection device can include a projection chip, which can convert an input signal into an image.

[0099] The projection device can include an optical system. The optical system can include lenses, mirrors, prisms, etc., which can guide and adjust the route of light. The optical system can focus and transmit the light emitted by the light source to the projection chip.

[0100] The projection device can include a heat dissipation system. The heat dissipation system usually includes components such as heat dissipation fans, heat dissipation fins, etc. The heat dissipation system can dissipate heat inside the device, ensuring that the projection device works normally for a long time.

[0101] The projection device can include a control panel. The control panel can be used to set and operate the projection device. Various function buttons and indicator lights can be provided on the control panel to facilitate user adjustment and monitoring of the projection device.

[0102] The projection device can include a lens assembly. The lens assembly can project an image onto a screen and is one of the key components of the projection device. The lens assembly is arranged on one side of the accommodating cavity close to the rear shell.

[0103] The projection device can include a cover plate assembly 20. The cover plate assembly 20 can be arranged at the communication port 111 and used to decorate the projection device to improve the aesthetics of the projection device.

[0104] The cover plate assembly 20 can have light transmission properties, and the cover plate assembly 20 is arranged opposite to the lens assembly so that the light emitted by the lens assembly can pass through the cover plate assembly 20 and be transmitted to the screen.

[0105] The cover plate assembly 20 is provided with a movable port 200 facing the rear shell, so that the light emitted by the lens assembly can propagate along the movable port 200, pass through the cover plate assembly 20, and be transmitted to the screen to realize the projection function of the projection device.

[0106] Referring to Figure 3 and Figure 5 In some embodiments of the present application, the cover plate assembly 20 can include a fixed ring 210, which can play a decorative role for the projection device. The fixed ring 210 can be detachably arranged on the front shell 110, facilitating the disassembly, cleaning, or replacement of the fixed ring 210.

[0107] For example, the fixed ring 210 is provided with a buckle, and the cover plate assembly 20 is provided with a groove, and the buckle and the groove are connected to realize the installation of the fixed ring 210. In this way, the fixed ring 210 is easy to disassemble.

[0108] The cover plate assembly 20 can include a transparent cover plate 220. The transparent cover plate 220 can protect the lens assembly and help prevent foreign matter from entering the housing to damage the lens assembly. The transparent cover plate 220 can have elements such as patterns added thereon to improve the aesthetics of the projection device.

[0109] For example, the transparent cover plate 220 can be made of glass material to increase the light transmittance of the transparent cover plate 220 and avoid affecting the light emitted by the lens assembly to cause poor projection effect.

[0110] The cover plate assembly 20 can include a compression ring 230 for fixing the transparent cover plate 220. The compression ring 230 partially or entirely extends into the ring groove 213, and the compression ring 230 is in compression with the transparent cover plate 220.

[0111] The lens assembly can include a lens barrel. The lens barrel can be disposed on the side of the lens assembly close to the rear shell. The lens barrel can be movably disposed in the accommodating cavity to be close to or away from the communication port 111. By moving the lens barrel, the focal length can be adjusted according to the projection requirements to ensure the clarity and accuracy of the projection picture. In this way, the projection device can be adapted to different distances of the projection screen to increase the application occasions of the projection device.

[0112] For example, a motor can be disposed in the accommodating cavity of the projection device to control the lens barrel to be close to or away from the communication port 111 to realize the focusing of the projection device.

[0113] Referring to Figure 5 As shown in the figure, the lens assembly can include a lens 320. The lens 320 can focus light to ensure the clarity and brightness of the projection picture. The lens 320 can be disposed inside the lens barrel, and the lens 320 can be disposed opposite to the communication port 111 so that the light passes through the lens assembly of the communication port 111 through the lens 320 of the lens assembly, which can improve the accuracy of the projection onto the screen.

[0114] The lens assembly can include a dustproof frame 330. The dustproof frame 330 can provide support for elements disposed on the dustproof frame 330. The dustproof frame 330 is disposed outside the lens barrel, and the dustproof frame 330 can be detachably connected with the outside of the lens barrel to facilitate the assembly of the dustproof frame 330. For example, the dustproof frame 330 can be buckled with the outside of the lens barrel.

[0115] The dustproof frame 330 and the cover plate assembly 20 form a gap, which can provide a space for the movement of the lens barrel to prevent the lens barrel from interfering with the cover plate assembly 20 when moving.

[0116] Dust can enter the movable port 200 from the connection between the fixed ring 210 and the lens, spread into the accommodation cavity from the movable port 200 to the side away from the movable port 200, and enter the lens assembly, causing the projection image to be blurred. In order to prevent dust from entering the lens assembly, the projection device can include a dustproof piece 40, part or all of which can be filled in the gap to prevent dust from entering the lens assembly.

[0117] The first end of the dustproof piece 40 can be arranged on the dustproof frame 330, so that the dustproof piece 40 cannot fall off or shift when the lens assembly moves, causing the dustproof function to fail.

[0118] The second end of the dustproof piece 40 can move with the lens barrel, and the lens barrel can extend or retract in the direction of approaching or moving away from the dustproof frame 330. The second end of the dustproof piece 40 abuts against the inner wall of the movable port 200. The dustproof piece 40 can fill the path from the movable port 200 to the side of the accommodation cavity away from the movable port 200, block the gap between the dustproof frame 330 and the cover plate assembly 20, and prevent dust from entering the lens assembly.

[0119] The cover plate assembly 20 is arranged on the front shell 110 through the communication port 111, and the lens assembly is arranged in the accommodation cavity surrounded by the rear shell and the front shell 110. The lens barrel can move forward and backward to realize the focusing or focusing of the projection device. The cover plate assembly 20 is provided with a movable port 200 to prevent the lens assembly from interfering with the cover plate assembly 20. The lens barrel is provided with a dustproof frame 330 on the outside, and a gap is formed between the dustproof frame 330 and the cover plate assembly 20. The first end of the dustproof piece 40 is arranged on the dustproof frame 330, and the second end of the dustproof piece 40 can extend or retract in the direction of approaching or moving away from the first end of the dustproof piece 40. The second end of the dustproof piece 40 can abut against the inner wall of the movable port 200. When the lens barrel moves, the dustproof piece 40 can deform to adapt to the change of the gap, preventing dust from spreading from the movable port 200 to the side of the accommodation cavity away from the movable port 200. The dustproof piece 40 can block the gap between the dustproof frame 330 and the cover plate assembly 20, prevent dust from entering the lens assembly, and further avoid the projection image from being blurred. In this way, the sealing performance of the projection device can be improved, and the stability of the projection quality can be ensured.

[0120] In some embodiments of the present application, the dustproof piece 40 can be arranged as an elastic dustproof piece. The elastic dustproof piece can have a certain deformation ability, which can adapt to dustproof frames 330 and movable ports 200 of different sizes and shapes, and ensure the stability of the dustproof effect.

[0121] The inner walls of the dustproof frame 330 and the movable port 200 jointly apply extrusion force to the elastic dustproof piece 40, which can make the elastic dustproof piece 40 in a compressed state. In this way, the adhesion to the inner walls of the dustproof frame 330 and the movable port 200 can be improved, thereby improving the sealing effect of the projection device and preventing dust and impurities from entering the lens assembly.

[0122] For example, the elastic dustproof component 40 can be made of foam. Foam has good sealing performance, which can improve the sealing of the projection equipment. Foam material has high wear resistance and corrosion resistance, which can prevent the elastic dustproof component 40 from aging or being damaged when it moves frequently with the lens barrel.

[0123] In some embodiments of this application, when the lens barrel approaches the communication port 111, the lens barrel will drive the dustproof component 40 to approach the communication port 111, and then approach the cover plate assembly 20. The outer surface of the dustproof bracket 330 can be inserted into the movable opening 200 of the cover plate assembly 20 to prevent the dustproof bracket 330 from interfering with or colliding with the cover plate assembly 20, thereby ensuring the reliability of the lens assembly and the cover plate assembly 20.

[0124] The dustproof component 40 can be configured as a ring-shaped dustproof component, with the inner side of the ring-shaped dustproof component fitted onto the outer surface of the dustproof frame 330, and the outer side of the ring-shaped dustproof component abutting against the inner wall of the movable opening 200. The ring-shaped dustproof component can improve the uniformity of its contact with the dustproof frame 330 and the movable opening 200, and enhance the sealing effect of the projection equipment.

[0125] For example, the ring-shaped dustproof component can be installed on the lens barrel using an adhesive mounting method. Adhesive mounting makes the installation of the ring-shaped dustproof component simple and quick, eliminating the need for connecting structures or additional mounting structures.

[0126] Reference Figure 6 and Figure 7 As shown, in some embodiments of this application, the dust cover 330 is provided with a limiting part 331, which can limit the position of the annular dust cover. The limiting part 331 can protrude from the outer surface of the dust cover 330, reducing the number of parts and reducing the assembly time of the projection equipment.

[0127] As the lens barrel approaches the connecting port 111, the compression of the annular dustproof component increases, and the elastic force generated by the annular dustproof component increases, which may cause the annular dustproof component to move away from the connecting port 111. The surface of the annular dustproof component away from the connecting port 111 abuts against the surface of the limiting part 331 facing the connecting port 111. In this way, the limiting part 331 can prevent the annular dustproof component from moving away from the connecting port 111, which would prevent the annular dustproof component from filling the gap and affecting the sealing performance of the projection device.

[0128] If the thickness H of the dustproof component is greater than 6mm in the direction of lens barrel movement, the dustproof component 40 will occupy more space within the cavity, resulting in a larger size of the projection device and affecting its portability. Furthermore, a thicker dustproof component 40 will require more material, increasing the cost of the projection device.

[0129] In the moving direction of the lens barrel, the dustproof member thickness H is less than 4mm. When the lens barrel moves the dustproof frame 330 away from the cover plate assembly 20, the dustproof member 40 will be stretched, and the second end of the dustproof member 40 may be separated from the inner wall of the movable port 200, resulting in the gap being unable to be sealed to prevent dust from entering the lens assembly.

[0130] Therefore, in the moving direction of the lens barrel, the dustproof member thickness H is set to 4-6mm, which can prevent dust from entering the lens assembly without occupying too much space. For example, the dustproof member thickness H is set to 4mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm, 5.0mm, 5.2mm, 5.4mm, 5.6mm, 5.8mm, 6.0mm or a range formed by any two of them.

[0131] As mentioned earlier, the dustproof frame 330 and the cover plate assembly 20 form a gap to provide space for the lens barrel to move. Referring to Figure 6 , the gap includes a first gap L1 and a second gap L2, the first gap L1 is located between the dustproof frame 330 and the inner wall of the movable port 200, the distance of the first gap L1 does not change, and the part of the dustproof member 40 located in the first gap L1 does not change much. This part of the dustproof member 40 does not need to deform frequently, can provide a more stable sealing effect, can reduce material fatigue and wear, and prolong the service life of the dustproof member 40. The second gap L2 is located between the compression ring 230 and the limiting portion 331, and the limiting portion 331 moves with the lens barrel, so that the distance of the second gap L2 changes, and the part of the dustproof member 40 located in the second gap L2 is compressed and stretched. The part of the dustproof member 40 located in the second gap L2 can adapt to the dynamic movement of the lens barrel, ensuring the sealing performance under dynamic conditions.

[0132] The mounting structure of the fixed ring, the transparent cover plate and the compression ring will be described in detail below.

[0133] Referring to Figure 8- Figure 12 , in some embodiments of the present application, the fixed ring 210 is provided with one or more protrusions 211, which are located on the side of the fixed ring 210 facing the rear shell, so as to be mounted on the front shell 110.

[0134] The surface of the front shell 110 facing the rear shell is provided with a corresponding elastic clamping portion 112, which is arranged on the periphery of the communication port 111. The elastic clamping portion 112 can provide a force to the fixed ring 210 through its elastic deformation, ensuring the firm installation of the fixed ring 210.

[0135] When the fixed ring 210 is arranged on the communication port 111, the protrusion 211 is clamped with the elastic clamping portion 112. Through the cooperation of the protrusion 211 and the elastic clamping portion 112, the assembly of the fixed ring 210 is facilitated, and the assembly efficiency of the fixed ring 210 is improved.

[0136] For example, the elastic clamping portion 112 is provided with a U-shaped structure, so that the elastic clamping portion 112 has a sufficient deformation amount, and the stability of the clamping of the protrusion 211 and the elastic clamping portion 112 is improved.

[0137] In some embodiments of the present application, the outer surface of the fixing ring 210 is provided with one or more insertion grooves 212, the groove of the insertion groove 212 is away from the axis of the fixing ring 210, and the insertion groove 212 is inserted with the front shell 110 to realize the installation of the fixing ring 210.

[0138] At the matching position of the insertion groove 212 on the front shell 110, a bevel is processed along the edge of the communication port 111 in the direction of the front shell 110, which facilitates the insertion of the insertion groove 212 and the front shell 110, prevents excessive assembly stress, and improves the convenience of the installation of the fixing ring 210.

[0139] In some embodiments of the present application, the outer surface of the fixing ring 210 can be provided with three protrusions 211 and one insertion groove 212. The front shell 110 is provided with corresponding elastic clamping portions 112 on the surface facing the rear shell. The protrusions 211 are clamped with the elastic clamping portions 112 through the insertion of the insertion groove 212 and the front shell 110, and the deformation of the elastic clamping portions 112 provides the installation force for the fixing ring 210. The fixing ring 210 is installed on the front shell 110 through clamping and insertion, which can improve the assembly efficiency of the fixing ring 210. The fixing ring 210 is convenient to disassemble, which facilitates the maintenance and replacement of the fixing ring 210.

[0140] In combination with Figure 5 , as shown in Figure 9 , the inner side of the fixing ring 210 is provided with a ring groove 213, and the groove bottom surface of the ring groove 213 faces the lens assembly. The transparent cover plate 220 is arranged in the ring groove 213, and the transparent cover plate 220 abuts against the groove bottom surface of the ring groove 213. The fixing ring 210 can limit the transparent cover plate 220 through the ring groove 213 to prevent the movement of the transparent cover plate 220. The transparent cover plate 220 is arranged in the ring groove 213, which can avoid the generation of a flash gap between the transparent cover plate 220 and the fixing ring 210. That is, in the direction of the front shell 110 outward of the projection device, there is no gap between the edge of the transparent cover plate 220 and the ring edge of the ring groove 213, which can improve the appearance of the projection device.

[0141] The compression ring 230 is partially or entirely inserted into the ring groove 213, and the side of the compression ring 230 away from the lens barrel is pressed against the transparent cover plate 220. Through the compression ring 230 applying pressure to the transparent cover plate 220 and the limiting of the ring groove 213, the movement of the transparent cover plate 220 can be limited, so that the transparent cover plate 220 is fixed in the ring groove 213 and adheres to the fixing ring 210. In this way, the gap between the transparent cover plate 220 and the adhering surface of the fixing ring 210 can be prevented, which affects the appearance of the projection device.

[0142] In addition, compared with the mounting mode of the transparent cover plate 220 by being pasted to the fixing ring 210, the transparent cover plate 220 is defined by the pressing ring 230, which can avoid the existence of residual glue around the transparent cover plate 220, thereby avoiding affecting the appearance of the projection device.

[0143] For example, the pressing ring 230 is provided with a mounting hole. The front shell 110 can be provided with a screw 113 (refer to Figure 10 ) by an injection molding integrated process. The pressing ring 230 is fixed on the front shell 110 by screwing the screw 113 through the mounting hole and then fastening the nut, so that the transparent cover plate 220 is convenient to disassemble.

[0144] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0145] In order to facilitate explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussion is not intended to exhaust or limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained according to the above teachings. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. A projection device, characterized in that, include: Housing, the housing comprising: The front shell (110) is provided with a communication port (111); The rear shell, together with the front shell (110), forms a receiving cavity; A cover plate assembly (20) is disposed at the communication port (111), and the cover plate assembly (20) is provided with an movable opening (200) facing the rear shell; Lens assembly, including: The lens barrel is disposed on the side of the lens assembly near the rear housing; the lens barrel is movably disposed within the receiving cavity to be close to or away from the communication port (111); The lens (320) is located inside the lens barrel and is opposite to the communication port (111); A dust cover (330) is disposed on the outside of the lens barrel; the dust cover (330) forms a gap with the cover plate assembly (20); a dust cover (40) is at least partially filled in the gap; a first end of the dust cover (40) is disposed on the dust cover (330), and a second end of the dust cover (40) is retractable in a direction close to or away from the dust cover (330), and the second end of the dust cover (40) abuts against the inner wall of the movable opening (200).

2. The projection device according to claim 1, characterized in that, When the lens barrel is close to the communication port (111), the outer surface of the dust cover (330) can be inserted into the movable port (200); The dustproof component (40) is configured as an annular dustproof component; the inner side of the annular dustproof component is sleeved on the outer surface of the dustproof frame (330), and the outer side of the annular dustproof component abuts against the inner wall of the movable opening (200).

3. The projection device according to claim 2, characterized in that, The dustproof frame (330) is provided with a limiting part (331), which protrudes from the outer surface of the dustproof frame (330); The surface of the limiting part (331) facing the communication port (111) abuts against the surface of the annular dustproof member away from the communication port (111).

4. The projection device according to claim 1, characterized in that, The dustproof component (40) is configured as an elastic dustproof component, which is in a compressed state; the inner walls of the dustproof frame (330) and the movable opening (200) together apply a compressive force to the elastic dustproof component.

5. The projection device according to claim 2, characterized in that, In the direction of movement of the lens barrel, the thickness of the dustproof component is set to 4-6 mm.

6. The projection device according to any one of claims 1-5, characterized in that, The cover assembly (20) includes a retaining ring (210) which is detachably disposed on the front shell (110).

7. The projection device according to claim 6, characterized in that, The fixing ring (210) is provided with at least one protrusion (211); The front shell (110) has at least one elastic snap-fit ​​part (112) on the surface facing the rear shell, and the elastic snap-fit ​​part (112) is disposed on the periphery of the communication port (111); The fixing ring (210) is disposed at the communication port (111), the protrusion (211) is located on the side of the fixing ring (210) facing the rear shell, and the protrusion (211) is engaged with the elastic snap-fit ​​part (112); And / or, the outer surface of the fixing ring (210) is provided with at least one insertion groove (212), the groove opening of the insertion groove (212) is away from the axis of the fixing ring (210), and the insertion groove (212) is inserted into the front shell (110).

8. The projection device according to claim 7, characterized in that, The fixing ring (210) has an annular groove (213) on its inner side, and the bottom surface of the annular groove (213) faces the lens assembly; The cover plate assembly (20) includes a transparent cover plate (220), which is disposed in the annular groove (213) and abuts against the bottom surface of the annular groove (213).

9. The projection device according to claim 8, characterized in that, The dustproof frame (330) is provided with a limiting part (331), which protrudes from the outer surface of the dustproof frame (330); The cover plate assembly (20) further includes a pressure ring (230), which at least partially extends into the annular groove (213), and the side of the pressure ring (230) facing away from the lens barrel is pressed against the transparent cover plate (220); The gap includes a first gap and a second gap that are connected. The first gap is located between the inner wall of the dustproof frame (330) and the movable opening (200), and the second gap is located between the pressure ring (230) and the limiting part (331).

10. A projection device, characterized in that, include: Housing, the housing comprising: The front shell (110) is provided with a communication port (111); The rear shell, together with the front shell (110), forms a receiving cavity; A cover plate assembly (20) is disposed at the communication port (111), and the cover plate assembly (20) is provided with a movable port (200); Lens assembly, including: The lens tube is movably disposed within the receiving cavity to be close to or away from the communication port (111); The lens (320) is located inside the lens barrel and is opposite to the cover plate assembly (20); A dust cover (330) is disposed on the outside of the lens barrel; a gap is formed between the dust cover (330) and the cover plate assembly (20); Dustproof parts (40); When the lens barrel moves the lens (320) closer to or further away from the communication port (111), the dustproof component (40) deforms and seals the gap.

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