A projection device

Abstract

This invention discloses a projection device, comprising: a housing with a projection hole; a lens connected to the housing to close the projection hole; a lens assembly disposed within the housing, the lens assembly including a telescopic portion and a fixing portion sleeved on the telescopic portion; a first sealing member sleeved on the outside of the fixing portion and extending towards the projection hole, the first sealing member having a first sealing surface inclined towards the projection hole; and a second sealing member disposed on the periphery of the projection hole and sealingly engaging with the housing, the second sealing member having a second sealing surface inclined towards the lens assembly, the second sealing surface abutting against the first sealing surface, the first sealing member and the second sealing member cooperating to form a sealed space, the sealed space accommodating the telescopic portion for sealing and dust prevention. This technical solution solves the technical problem of the difficulty in properly assembling the existing projector lens sealing structure.

Description

Technical Field

[0001] This invention relates to the field of projection equipment technology, and in particular to a projection device. Background Technology

[0002] A projector is a type of display device used to project images onto a wall or screen. Currently, projectors are widely used in various industries. A typical projector consists of a main body and a lens mounted on the main body for projecting images. The lens, as the output of the projected image, directly affects the projection quality during use.

[0003] As usage time increases, dust will accumulate on the lens, which will block the projected light and directly affect the projection effect. To solve this problem, existing projectors are generally equipped with a dustproof structure for the lens, which is usually a seal between the lens and the housing.

[0004] However, since the housing needs to be assembled with the lens in a vertical or horizontal direction, the dustproof structure is easily scratched by the housing or lens during the assembly process, which may cause damage to the dustproof structure or improper assembly, affecting the final dustproof effect. Summary of the Invention

[0005] The main objective of this invention is to provide a projection device that solves the technical problem of difficulty in assembling the sealing structure of existing projector lenses.

[0006] To achieve the above objectives, the projection device proposed in this invention includes:

[0007] The outer casing has a projection hole;

[0008] A lens is attached to the housing to seal the projection hole;

[0009] A lens assembly is disposed within the housing, the lens assembly including a telescopic part and a fixing part sleeved on the telescopic part;

[0010] A first sealing element, one end of which is sleeved on the outside of the fixing part and extends toward the projection hole, the first sealing element having a first sealing surface that is inclined toward the projection hole; and

[0011] The second seal is disposed on the periphery of the projection hole and is sealed to the housing. The second seal has a second sealing surface that faces the lens assembly and is inclined. The second sealing surface abuts against the first sealing surface. The first seal, the second seal, and the housing cooperate to form a sealed space. The sealed space accommodates the telescopic part to seal and prevent dust.

[0012] Optionally, the first seal includes:

[0013] A first sealing body, the first sealing body having a first end face facing the projection hole;

[0014] The second sealing body has a second end face facing the side of the projection hole;

[0015] The first sealing body and the second sealing body are detachably fastened to the outer peripheral wall of the fixing part, and the first end face and the second end face are joined to form the first sealing surface.

[0016] Optionally, the second seal includes a third sealing body, which is disposed around the projection hole and extends obliquely toward the lens assembly. The third sealing body and the housing together form a cavity with an opening on one side. The second sealing surface is the end face of the third sealing body facing the lens assembly. The first sealing body and the second sealing body abut against the end face to close the cavity and form the sealing space.

[0017] Optionally, the projection device further includes a flexible pad disposed between the first seal and the second seal, wherein the first sealing surface and the second sealing surface cooperate to clamp the flexible pad.

[0018] Optionally, the second seal further includes a decorative body disposed in the cavity and surrounding the projection hole. The decorative body has a light-transmitting hole that is opposite to the projection hole. The decorative body has a first abutting portion extending toward the opening of the cavity, and the second seal has a second abutting portion extending toward the projection hole. The first abutting portion and the second abutting portion cooperate to clamp the end of the flexible pad.

[0019] Optionally, a third abutment portion is provided on the periphery of the cavity opening, and the third abutment portion cooperates with the second abutment portion to clamp the end of the flexible pad.

[0020] Optionally, the projection device further includes a flexible sleeve, which is disposed between the first seal and the fixing part, wherein the first seal and the fixing part cooperate to clamp the flexible sleeve.

[0021] Optionally, the inner wall of the flexible sleeve is provided with a stop portion, which abuts against the end face of the fixing portion; and / or, the flexible pad is made of foam, and the flexible sleeve is made of silicone or soft rubber.

[0022] Optionally, the housing includes:

[0023] The housing has a mounting cavity with an opening on one side and a projection hole on one side wall, the lens is fastened to the projection hole, and the first sealing member is disposed in the mounting cavity;

[0024] The cover is fastened to the opening of the mounting cavity, and the lens assembly is disposed on the side of the cover facing the housing and housed within the mounting cavity;

[0025] The first sealing surface is inclined toward the mounting cavity opening and the lens assembly, and the second sealing surface is inclined toward the projection hole and the bottom wall of the mounting cavity.

[0026] Optionally, the cover has a support protruding on the side facing the housing, and the support is connected to the first seal.

[0027] Compared with the prior art, in this technical solution, the projection device includes a housing with a projection hole for the projected image to pass through. A lens is provided at the projection hole to close it. A lens assembly is provided inside the housing, including a telescopic part and a fixing part fitted onto the outside of the telescopic part. Furthermore, the projection device also includes a first seal and a second seal. The first seal is fitted onto the outside of the fixing part and extends towards the projection hole. The first seal has a first sealing surface on the side facing the projection hole, which is inclined. The second seal surrounds the periphery of the projection hole and seals with the housing. The second seal has a second sealing surface facing the lens assembly, which is also inclined. The first sealing surface and the second sealing surface can abut and fit together. At this time, the first seal, the second seal, and the housing together enclose the telescopic part to form a sealed space, isolating the telescopic part from the external environment, thereby achieving a sealing and dustproof function for the telescopic part. In this technical solution, dust prevention of the telescopic part is achieved by setting a first sealing element and a second sealing element, and by the contact between the first sealing surface and the second sealing surface. In addition, since the first sealing surface and the second sealing surface are both inclined in one direction, the first sealing element and the second sealing element can slide relative to each other in the inclined direction to the final assembly position during the assembly of the housing and the lens assembly, which prevents the first sealing element and the second sealing element from scratching each other during the assembly process and ensures the sealing effect. In addition, the inclined setting also allows the first sealing element and the second sealing element to be assembled in two directions, which also reduces the assembly difficulty of the sealing assembly. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment of the projection device of the present invention;

[0030] Figure 2 This is a cross-sectional schematic diagram of an embodiment of the projection device of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the housing, the second sealing element, and the decorative element in one embodiment of the projection device of the present invention;

[0032] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0033] Figure 5 This is a schematic diagram of the structure of the first sealing element in one embodiment of the projection device of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of the decorative body in one embodiment of the projection device of the present invention;

[0035] Figure 7 This is a schematic diagram of the sealing gasket structure in one embodiment of the projection device of the present invention;

[0036] Figure 8 This is a schematic diagram of the sealing sleeve in one embodiment of the projection device of the present invention.

[0037] Explanation of icon numbers:

[0038]

[0039] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0041] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0042] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0044] In existing projector lens sealing and dustproof solutions, a sealing structure is typically set up in the front-to-back direction of the lens to work with the housing for sealing. When the projector can be assembled along the front-to-back direction of the lens, the assembly of this sealing structure is relatively convenient, and the sealing effect after assembly can be guaranteed. However, when the projector housing is assembled with the lens in the vertical direction, the sealing structure will be subjected to vertical compression during the assembly process, which can easily lead to damage to the sealing structure or failure to assemble properly, affecting the final sealing effect.

[0045] To address the aforementioned technical problems, this technical solution proposes a projection device, which includes:

[0046] The outer casing 10 has a projection hole;

[0047] Lens 20 is connected to housing 10 to seal the projection hole;

[0048] The lens assembly 30 is disposed inside the housing 10. The lens assembly 30 includes a telescopic part 31 and a fixing part 32 sleeved on the telescopic part 31.

[0049] The first sealing member 100 is sleeved on the outside of the fixing part 32 and extends toward the projection hole side. The first sealing member 100 has a first sealing surface that is inclined toward the projection hole side; and

[0050] The second seal 200 is disposed on the periphery of the projection hole and is sealed to the housing 10. The second seal 200 has a second sealing surface that is inclined toward the lens assembly 30. The second sealing surface abuts against the first sealing surface. The first seal 100, the second seal 200 and the housing 10 cooperate to form a sealed space. The sealed space accommodates the telescopic part 31 for sealing and dust prevention.

[0051] Compared with the prior art, in this technical solution, the projection device includes a housing 10, which has a projection hole for the projected image to pass through. A lens 20 is provided at the projection hole, which closes the projection hole. A lens assembly 30 is provided inside the housing 10, which includes a telescopic part 31 and a fixing part 32 sleeved on the outside of the telescopic part 31. In addition, the projection device also includes a first sealing member 100 and a second sealing member 200. The first sealing member 100 is used to be sleeved on the outside of the fixed part 32. The first sealing member 100 extends towards the projection hole and has a first sealing surface on the side facing the projection hole. The first sealing surface is inclined. The second sealing member 200 surrounds the periphery of the projection hole and is sealed with the outer shell 10. The second sealing member 200 has a second sealing surface facing the lens assembly 30. The second sealing surface is inclined. The first sealing surface and the second sealing surface can abut and fit together. At this time, the first sealing member 100, the second sealing member 200 and the outer shell 10 together surround the outer periphery of the telescopic part 31 to form a sealed space, which isolates the telescopic part 31 from the external environment, thereby achieving the sealing and dustproof function of the telescopic part 31. In this technical solution, by setting a first sealing element 100 and a second sealing element 200, and by abutting the first sealing surface and the second sealing surface, the telescopic part 31 is dustproof. In addition, since the first sealing surface and the second sealing surface are both inclined in one direction, the first sealing element 100 and the second sealing element 200 can slide relative to each other in the inclined direction to the final assembly position during the assembly of the housing 10 and the lens assembly 30, preventing the first sealing element 100 and the second sealing element 200 from rubbing against each other during the assembly process, thus ensuring the sealing effect. In addition, the inclined setting also allows the first sealing element 100 and the second sealing element 200 to be assembled in two directions, which also reduces the assembly difficulty of the sealing assembly.

[0052] Specifically, such as Figures 1-7The projection device includes a housing 10 and a lens assembly 30. The housing 10 is a box-shaped structure with a mounting cavity inside. The lens assembly 30 can be housed in the mounting cavity during assembly. One end face of the housing 10 is provided with a projection hole, through which the projected image of the lens assembly 30 can pass. The lens assembly 30 includes a telescopic part 31 and a fixing part 32. The fixing part 32 constitutes the main body of the lens assembly 30 and is used to connect with the housing 10. The fixing part 32 is sleeved on the telescopic part 31. The telescopic part 31 can extend and retract toward the projection hole to achieve a focusing function. The telescopic part 31 can project an image toward the projection hole. To achieve a sealed and dustproof design for the telescopic part 31, the projection device includes a first sealing member 100 and a second sealing member 200. The first sealing member 100 can be a cylindrical structure fitted onto the fixing part 32 and forming a sealing fit with the outer peripheral wall of the fixing part 32. The first sealing member 100 has an internal cavity to accommodate the telescopic part 31. Furthermore, the first sealing member 100 extends towards the projection hole and has a first sealing surface on this side. This first sealing surface surrounds the telescopic part 31 and is inclined. In this embodiment, the first sealing member 100 has a first opening on the side facing the projection hole, inclined towards the top wall of the outer casing 10 and towards the side wall where the projection hole is located. The periphery of this first opening is the first sealing surface. The second sealing member 200 is disposed on the outer casing 10 and surrounds the projection hole. The second sealing member 200 is sealed to the side wall where the projection hole is located. The second sealing member 200 has a second sealing surface on the side facing the lens assembly 30. The second sealing surface is also inclined. In this embodiment, the second sealing member 200 has a second opening on the side facing the lens assembly 30, which is inclined towards the bottom wall of the housing 10 and towards the lens assembly 30. The periphery of the second opening is the second sealing surface. The second sealing surface is adapted to the first sealing surface. When the housing 10 is fastened to the lens assembly 30, the first sealing surface and the second sealing surface fit together and abut against each other, so that the first sealing member 100 and the second sealing member 200 form a sealing fit. At this time, the first sealing member 100, the second sealing member 200 and the inner wall of the housing 10 will surround and form a sealed space. The telescopic part 31 will be housed in the sealed space, isolating the telescopic part 31 from the outside, thereby achieving sealing and dust prevention.Furthermore, in the actual assembly process of the projection device, the inclined design of the first and second sealing surfaces allows the housing 10 and the lens assembly 30 to be simultaneously assembled in the vertical direction and in the front-rear direction along the telescopic part 31. For example, when the housing 10 is assembled with the lens assembly 30 in the vertical direction, the first and second sealing surfaces will partially fit together. If the first seal 100 and the second seal 200 are not fully in the sealing position at this time, the first seal 100 and the second seal 200 can slide relative to each other along the inclined direction of the first sealing surface until the first sealing surface... When fully fitted with the second sealing surface, the first sealing element 100 and the second sealing element 200 achieve a sealing fit, completing the seal. In other words, during the assembly process, the first sealing element 100 and the second sealing element 200 will not rub or collide, ensuring that the projection device can be assembled in place, thereby ensuring the final dustproof sealing effect. In addition, this technical solution also allows the housing 10 and the lens assembly 30 to be assembled in both the vertical direction and the front-back direction of the telescopic part 31. The front-back assembly process is similar to the above assembly process, which helps to reduce the assembly difficulty of the projection device. Furthermore, it is conceivable that the first opening of the first sealing member 100 is inclined toward the side wall where the projection hole is located and toward the adjacent side wall of that side wall, and the second opening of the second sealing member 200 is correspondingly inclined toward the side wall where the projection hole is located and toward another adjacent side wall of that side wall. That is, by adjusting the inclination direction of the first sealing surface and the second sealing surface, while satisfying the sealing effect of the previous embodiment, assembly in the front-back direction and left-right direction of the telescopic part 31 can be realized. By extension, by adjusting the inclination direction of the first sealing surface and the second sealing surface, assembly of the housing 10 and the lens in any direction can be realized, which can meet the assembly requirements under different working conditions.

[0053] Furthermore, the first seal 100 includes:

[0054] A first sealing body 110 has a first end face facing the projection hole side;

[0055] The second sealing body 120 has a second end face facing the projection hole side;

[0056] The first sealing body 110 and the second sealing body 120 are detachably fastened to the outer peripheral wall of the fixing part 32, and the first end face and the second end face are joined together to form the first sealing surface.

[0057] Furthermore, the first sealing body 110 is snapped into the second sealing body 120; and / or, the first sealing body 110 and the second sealing body 120 are screwed together.

[0058] Specifically, such as Figure 2 and Figure 5To facilitate the assembly and disassembly of the first sealing element 100, in this embodiment, the outer periphery of the fixing part 32 is a cylindrical structure. The first sealing element 100 includes a first sealing body 110 and a second sealing body 120. Both the first sealing body 110 and the second sealing body 120 are semi-circular plate-shaped structures adapted to the outer periphery of the fixing part 32. The first sealing body 110 and the second sealing body 120 are respectively disposed on opposite sides of the fixing part 32, and the first sealing body 110 and the second sealing body 120 are fastened to the outer periphery of the fixing part 32, and are clamped together to achieve a seal between the first sealing element 100 and the fixing part 32. To facilitate assembly and disassembly, the first sealing body 110 and the second sealing body 120 can be connected by bolts or clips. In addition, the first sealing body 110 has a first end face facing the projection hole, and the second sealing body 120 has a second end face facing the projection hole. When the first sealing body 110 and the second sealing body 120 are engaged, the first end face and the second end face can be spliced ​​together to form a first sealing surface.

[0059] Furthermore, the second seal 200 includes a third seal 210, which is disposed around the projection hole and extends obliquely toward the lens assembly 30. The third seal 210 and the housing 11 together form a cavity with an opening on one side. The second sealing surface is the end face of the third seal 210 facing the lens assembly 30. The first seal 110 and the second seal 120 abut against the end face to close the cavity and form a sealed space.

[0060] Specifically, such as Figure 2 and Figure 4The second sealing element 200 includes a third sealing body 210, which is a rib structure surrounding the projection hole. In this embodiment, the rib structure is distributed on opposite sides of the projection hole in the horizontal direction and on one side near the top wall of the outer casing 10. The rib structure extends obliquely toward the telescopic part 31, forming a cavity with an opening toward the bottom wall of the outer casing 10. A third end face is formed at the end of the third sealing body 210 near the telescopic part 31. This third end face is the first sealing element. During assembly, the first and second end faces can abut against the third end face. Additionally, the end face of the third sealing body 210 facing the projection hole can abut against the inner wall of the outer casing 10. At this time, the first sealing body 110, the second sealing body 120, and the outer casing 10 form a sealed fit, and together they seal the cavity, forming the aforementioned sealed space and enclosing the telescopic part 31 within this sealed space, thus achieving a sealed dustproof environment for the telescopic part 31. Furthermore, for ease of processing, the third sealing body 210 can be manufactured integrally with the outer casing 10, reducing the number of parts in the projection device and lowering manufacturing costs. Integral molding also ensures that a sealed fit is easily formed between the outer casing 10 and the third sealing body 210, improving the sealing and dustproof effect.

[0061] Furthermore, the projection device also includes a flexible pad 300, which is disposed between the first sealing member 100 and the second sealing member 200. The first sealing surface and the second sealing surface cooperate to clamp the flexible pad 300. To improve the sealing effect, such as Figure 2 and Figure 7The projection device also includes a flexible pad 300, which is a ring-shaped structure made of flexible material. The flexible pad 300 is disposed between the first sealing member 100 and the second sealing member 200. When the first sealing member 100 and the second sealing member 200 are engaged, the first sealing surface and the second sealing surface are respectively attached to the opposite two end faces of the flexible pad 300. In order to ensure the sealing effect, the shape of the flexible pad 300 can be adapted to the first sealing surface and the second sealing surface, so that the first sealing surface and the second sealing surface can clamp the flexible pad 300. At this time, the flexible pad 300 can deform, so that it forms an interference fit with the first sealing surface and the second sealing surface, thereby ensuring the reliability of the sealing fit between the first sealing member 100 and the second sealing member 200. In this embodiment, the flexible pad 300 has a first strip structure disposed on both sides of the projection hole along the horizontal direction. The first strip structure is inclined from the projection hole to the lens assembly 30, and the inclination direction and angle are adapted to the first sealing surface. In addition, the flexible pad 300 also has a second strip structure. There are two second strip structures, which are disposed at both ends of the first strip structure. Both second strip structures extend in the horizontal direction, and their ends are respectively connected to the ends of the two first strip structures on the same side, together forming a flexible pad 300 with a square frame shape.

[0062] Furthermore, the second sealing element 200 also includes a decorative body 220, which is disposed within the cavity and surrounds the projection hole. The decorative body 220 has a light-transmitting hole, which is disposed opposite to the projection hole. The decorative body 220 has a first abutting portion 221 extending toward the opening of the cavity. The second sealing element 120 has a second abutting portion 121 extending toward the projection hole. The first abutting portion 221 and the second abutting portion 121 cooperate to clamp the end of the flexible pad 300.

[0063] like Figure 2 , Figure 4 and Figure 6The decorative body 220 is a plate-shaped structural component located within the cavity. A light-transmitting hole is formed on the decorative body 220. A retaining body is located on the side of the projection hole on the outer shell 10, forming a slot with the side wall where the projection hole is located. The decorative body 220 can be inserted into this slot to achieve positioning on the outer shell 10. At this time, the decorative body 220 fits against the periphery of the projection hole, and the light-transmitting hole is positioned opposite the projection hole. To ensure the connection strength with the outer shell 10, the decorative body 220 can be bolted to the outer shell 10. Furthermore, the periphery of the light-transmitting hole facing the outside of the outer shell 10 can be decorated with concentric circles or other decorative textures, or a mirror effect can be achieved through electroplating or other methods. The decorative body 220 can provide shielding for the internal components of the projection device and also improve the overall aesthetics of the projection device. In addition, to further improve the sealing effect, the end of the decorative body 220 facing the bottom wall of the outer shell 10 can extend to form a first abutment portion 221. Correspondingly, the end of the second sealing body 120 near the bottom wall of the outer shell 10 extends towards the projection hole to form a second abutment portion 121. When the first sealing member 100 and the second sealing member 200 are engaged, the first abutment portion 221 and the second abutment portion 121 can cooperate to clamp together at the end of the flexible pad 300. The engagement of the first abutment portion 221 and the second abutment portion 121, as well as the engagement of the first sealing surface and the second sealing surface, can achieve the sealing of the cavity, which is beneficial to ensuring the sealing effect.

[0064] Furthermore, a third abutment portion 211 is provided around the periphery of the cavity opening, and the third abutment portion 211 cooperates with the second abutment portion 121 to clamp the end of the flexible pad 300. In addition, to ensure a reliable connection between the third sealing body 210 and the second sealing body 120, a third abutment portion 211 is provided on the third sealing body 210 at the periphery of the cavity opening. There are two third abutment portions 211, which are horizontally disposed on both sides of the projection hole. The top surface of the third abutment portion 211 is a horizontally extending plane. When the first sealing member 100 and the second sealing member 200 are engaged, the third abutment portion 211 can press the end of the flexible pad 300 against the second abutment portion 121. Through the clamping and limiting of the flexible pad 300 by the third abutment portion 211 and the second abutment portion 121, the relative position of the first sealing member 100, the second sealing member 200 and the flexible pad 300 can be ensured, thereby ensuring the reliability of the seal.

[0065] Furthermore, the projection device also includes a flexible sleeve 400, which is disposed between the first sealing member 100 and the fixing part 32. The first sealing member 100 and the fixing part 32 cooperate to clamp the flexible sleeve 400. To further ensure sealing reliability, the projection device also includes a flexible sleeve 400, which can be a sleeve-shaped structure made of flexible material. The flexible sleeve 400 can be disposed between the first sealing member 100 and the fixing part 32. The first sealing member 100 and the fixing part 32 can cooperate to clamp the flexible sleeve 400, so that the flexible sleeve 400 and the first sealing member 100, and the flexible sleeve 400 and the fixing part 32 form an interference fit, thereby ensuring sealing reliability.

[0066] Furthermore, the inner wall of the flexible sleeve 400 is provided with a stop portion, which is used to abut against the end face of the fixing part 32; and / or, the flexible pad 300 is made of foam, and the flexible sleeve 400 is made of silicone or soft rubber. In this embodiment, the flexible sleeve 400 has a sealing cavity, the inner wall of which may be provided with a stop portion, which may extend around the inner wall of the sealing cavity. When the flexible sleeve 400 is fitted onto the fixing part 32, the stop portion may abut against the end face of the fixing part 32 to axially position the flexible sleeve 400 and ensure the relative stability of the position when the first sealing member 100 and the second sealing member 200 are engaged. To ensure a good seal, in this embodiment, the flexible pad 300 can be made of foam. When the first sealing member 100 and the second sealing member 200 come into contact, the flexible pad 300 can be fully compressed and deformed, allowing it to fit snugly against both the first sealing member 100 and the second sealing member 200, thus ensuring a good seal and bridging any gaps between the first sealing member 100 and the second sealing member 200 caused by manufacturing or assembly tolerances. Alternatively, the flexible sleeve 400 can be made of silicone or soft rubber. When the first sealing member 100 is fitted onto the fixing part 32, it can cooperate with the fixing part 32 to compress the flexible sleeve 400, which also helps improve the sealing effect.

[0067] Furthermore, the housing 10 includes:

[0068] The housing 11 has a mounting cavity with an opening on one side and a projection hole on one side wall. The lens 20 is fastened to the projection hole, and the first seal 100 is disposed in the mounting cavity.

[0069] The cover 12 is fastened to the opening of the mounting cavity, and the lens assembly 30 is disposed on the side of the cover 12 facing the housing 11 and is housed in the mounting cavity;

[0070] The first sealing surface is inclined toward the mounting cavity opening and the lens assembly 30, and the second sealing surface is inclined toward the projection hole and the bottom wall of the mounting cavity.

[0071] Specifically, such as Figure 1 and Figure 2 For ease of assembly, the housing 10 includes a housing 11, which is a box-shaped structure. The housing 11 has a mounting cavity for placing the lens assembly 30. The bottom wall of the housing 11 has an opening that connects to the mounting cavity. The lens assembly 30 can be installed in the mounting cavity through the opening. In addition, a projection hole is provided on one side wall of the housing 11. The lens 20 is fastened to the projection hole to close it. When the lens assembly 30 is installed in the housing 11, the telescopic part 31 of the lens assembly 30 is opposite to the projection hole, so that the projected image can be projected from the projection hole. The outer casing 10 also includes a cover 12, which is a plate-shaped structural component. The cover 12 is adapted to the opening of the casing 11, so that the cover 12 can be fastened to the opening by a detachable connection method such as adhesive, snap-fit ​​or screw, and the opening is closed. In addition, in order to fix the lens assembly 30 on the outer casing 10, multiple connecting posts can be protruded on the end face of the cover 12 facing the casing 11. The lens assembly 30 can be connected to the connecting posts by screws and is housed in the casing 11 when the cover 12 is connected to the casing 11. In addition, in this embodiment, the first sealing surface of the first sealing member 100 is inclined toward the direction of the cover 12 and the direction of the lens assembly 30. Correspondingly, the second sealing surface of the second sealing member 200 is inclined toward the projection hole side and the bottom wall opposite the opening in the mounting cavity. When the cover 12 is fastened to the housing 11, the first sealing member 100 in the housing 11 and the second sealing member 200 on the lens assembly 30 will cooperate in a direction perpendicular to the opening of the mounting cavity. During the cooperation process, the first sealing surface and the second sealing surface will be partially attached. If the first sealing member 100 and the second sealing member 200 have not fully reached the sealing position at this time, the first sealing member 100 and the second sealing member 200 can slide relative to each other along the inclined direction of the first sealing surface until the first sealing surface and the second sealing surface are fully attached. At this time, the first sealing member 100 and the second sealing member 200 achieve a sealing cooperation and complete the sealing. In addition, it is equivalent to adjusting the inclination direction of the first sealing surface and the second sealing surface by opening either a side wall or a top wall in the housing 11, thereby achieving the sealing assembly effect described in the above embodiment.

[0072] Furthermore, a support body 13 protrudes from the cover 12 towards the housing 11, and the support body 13 is connected to the first sealing element 100. Specifically, in order to ensure the reliable fit between the first sealing element 100 and the second sealing element 200, the projection device also includes a support body 13. The support body 13 is located on the end face of the cover 12 facing the housing 11 and extends away from the cover 12. The support body 13 can be a columnar structure. The first sealing element 100 can be connected to the support body 13 by bolts or other means. The support body 13 can support and connect the first sealing element 100, ensuring the relative fixation of the position of the first sealing element 100 and the second sealing element 200 when they fit together, thereby ensuring the sealing and dustproof effect.

[0073] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A projection device, characterized in that, include: The outer casing has a projection hole; A lens is attached to the housing to seal the projection hole; A lens assembly is disposed within the housing, the lens assembly including a telescopic part and a fixing part sleeved on the telescopic part; A first sealing element is sleeved on the outside of the fixing part and extends toward the projection hole. The first sealing element has a first sealing surface that is inclined toward the projection hole. as well as The second seal is disposed on the periphery of the projection hole and is sealed to the housing. The second seal has a second sealing surface that faces the lens assembly and is inclined. The second sealing surface abuts against the first sealing surface. The first seal, the second seal, and the housing cooperate to form a sealed space. The sealed space accommodates the telescopic part to seal and prevent dust.

2. The projection device as described in claim 1, characterized in that, The first seal includes: A first sealing body, the first sealing body having a first end face facing the projection hole; The second sealing body has a second end face facing the side of the projection hole; The first sealing body and the second sealing body are detachably fastened to the outer peripheral wall of the fixing part, and the first end face and the second end face are joined to form the first sealing surface.

3. The projection device as described in claim 2, characterized in that, The second sealing element includes a third sealing body, which is disposed around the projection hole and extends obliquely toward the lens assembly. The third sealing body and the housing together form a cavity with an opening on one side. The second sealing surface is the end face of the third sealing body facing the lens assembly. The first sealing body and the second sealing body abut against the end face to close the cavity and form the sealing space.

4. The projection device as described in claim 3, characterized in that, The projection device also includes a flexible pad, which is disposed between the first seal and the second seal, and the first sealing surface and the second sealing surface cooperate to clamp the flexible pad.

5. The projection device as described in claim 4, characterized in that, The second sealing element further includes a decorative body disposed within the cavity and surrounding the projection hole. The decorative body has a light-transmitting hole that is opposite to the projection hole. The decorative body has a first abutting portion extending toward the opening of the cavity, and the second sealing body has a second abutting portion extending toward the projection hole. The first abutting portion and the second abutting portion cooperate to clamp the end of the flexible pad.

6. The projection device as described in claim 5, characterized in that, The periphery of the cavity opening is provided with a third abutment portion, which cooperates with the second abutment portion to clamp the end of the flexible pad.

7. The projection device as described in claim 4, characterized in that, The projection device further includes a flexible sleeve, which is disposed between the first sealing member and the fixed part, and the first sealing member and the fixed part cooperate to clamp the flexible sleeve.

8. The projection device as described in claim 7, characterized in that, The inner wall of the flexible sleeve is provided with a stop portion, which abuts against the end face of the fixing portion; and / or, the flexible pad is made of foam, and the flexible sleeve is made of soft rubber.

9. The projection device as described in claim 1, characterized in that, The outer casing includes: The housing has a mounting cavity with an opening on one side and a projection hole on one side wall, the lens is fastened to the projection hole, and the first sealing member is disposed in the mounting cavity; The cover is fastened to the opening of the mounting cavity, and the lens assembly is disposed on the side of the cover facing the housing and housed within the mounting cavity; The first sealing surface is inclined toward the mounting cavity opening and the lens assembly, and the second sealing surface is inclined toward the projection hole and the bottom wall of the mounting cavity.

10. The projection device as described in claim 9, characterized in that, The cover has a support protruding on the side facing the housing, and the support is connected to the first sealing element.

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