Projection device

Abstract

The present application provides a kind of projection device, it includes shell, lens, two first ribs, two second ribs and sliding cover, wherein shell has top plate, left side wall and right side wall;Lens is arranged in shell, and is exposed by opening;Two first ribs are arranged in top plate, the extension direction of two first ribs is perpendicular to left side wall and right side wall, and opening is arranged between two first ribs;Sliding cover is slidably arranged in shell, for covering opening;Two second ribs are arranged in the top cover body of sliding cover, one of two second ribs is located between two first ribs;Wherein, sliding cover can be relative to shell sliding, when sliding cover is located in opening position, top cover body does not shield lens, when sliding cover is located in closing position, top cover body shields lens, and two second ribs are supported on corresponding two first ribs.The projection device of the present application can form closed space by sliding cover, shell and the ribs that support each other, to prevent dust from entering the inside of shell.

Description

Technical Field

[0001] This invention relates to a projection device, and more particularly to a projection device with dustproof properties. Background Technology

[0002] A projector is a display technology that projects a large image from a small image, which also means that a projector is a small but energy-intensive electronic product. Therefore, to address the high heat generated during projection, traditional projectors typically use active cooling designs such as fans, and have openings 12 on the casing 11 as air inlets and outlets (e.g., ...). Figure 1 (As shown). However, while the openings 12 on the housing 11 allow the projector 1 to achieve better heat dissipation, they also allow external dust to accumulate in the system of the projector 1. In particular, when dust accumulates on the projection lens 13, it will have a significant impact on the image quality and brightness of the projector 1.

[0003] As can be seen from the above, the current technology has the following unresolved problems:

[0004] 1. A heat dissipation design without openings will result in poor overall system heat dissipation efficiency, leading to overheating problems.

[0005] 2. The lack of a dustproof design on the lens will cause the brightness to decrease due to dust accumulation on the lens after a period of use. At the same time, the image sharpness will also become blurry because the dust will prevent the light from being effectively reflected to the preset position.

[0006] This "Background Art" section is only intended to help understand the content of this invention. Therefore, the content disclosed in the "Background Art" section may include some prior art that is not known to those skilled in the art. The content disclosed in the "Background Art" section does not mean that the content or the problems to be solved by one or more embodiments of this invention were known or recognized by those skilled in the art prior to this application. Summary of the Invention

[0007] This invention provides a projection device with dustproof effect.

[0008] A projection device according to the present invention includes a housing, a lens, two first ribs, two second ribs, and a sliding cover. The housing has a top plate, a left side wall, and a right side wall. The top plate is connected to the left side wall and the right side wall, and the top plate has an opening. The lens is disposed in the housing and exposed by the opening. The two first ribs are disposed on the top plate, and the extension direction of the two first ribs is perpendicular to the left side wall and the right side wall, and the opening is disposed between the two first ribs. The sliding cover is slidably disposed on the housing to cover the opening. The two second ribs are disposed on the top cover of the sliding cover, and one of the two second ribs is located between the two first ribs. The sliding cover can slide relative to the housing. When the sliding cover is in the open position, the top cover does not cover the lens. When the sliding cover is in the closed position, the top cover covers the lens, and the two second ribs abut against the corresponding two first ribs.

[0009] In the projection device of the present invention, the sliding cover is slidably disposed on the housing, and the sliding cover and the housing are provided with corresponding ribs. Therefore, when the lens is needed, the sliding cover can be slid along the housing to expose the opening of the top plate of the housing, and the projection device can project an image. When the lens is not needed, the sliding cover can be slid along the housing to cover the opening, and the ribs abut against each other to form a closed space surrounding the opening, thus achieving the effect of preventing dust from entering the interior of the housing.

[0010] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a traditional projector.

[0012] Figure 2 This is a three-dimensional schematic diagram of the projection device of the present invention.

[0013] Figure 3A for Figure 2 A schematic diagram of the projection device with its sliding cover in the open position.

[0014] Figure 3B for Figure 2 A schematic diagram of the projection device with its sliding cover in the closed position.

[0015] Figure 4A for Figure 3A Side view.

[0016] Figure 4B for Figure 3B Side view.

[0017] Figure 5A and Figure 5B A schematic diagram showing that the sliding cover of the projection device has ribs corresponding to the air outlet area.

[0018] Figure 5C This is a schematic diagram of another embodiment of the fifth and sixth ribs.

[0019] Figure 6 This is a schematic diagram showing the fitting of the sliding cover to the side wall of the housing.

[0020] Figure 7A and Figure 7B This is a schematic diagram of the protrusions on the cover and the protrusions on the sidewalls.

[0021] Figure 8A A schematic diagram showing a projection device equipped with sensors and a sliding cover in the closed position.

[0022] Figure 8B A schematic diagram showing a projection device equipped with sensors and a sliding cover in the open position.

[0023] Figure 8C A schematic diagram showing the different placement positions of the sensor.

[0024] Figure 9A and Figure 9B This is a schematic diagram showing a vent on the left side wall and a fence structure on the cover.

[0025] Figure 9C and Figure 9D This is a schematic diagram showing a vent on the right side wall and a fence structure on the cover. List of reference numerals 1: Projector 11: Outer shell 12: Opening 13: Projection lens 2: Projection device 21: Chassis 211: Top Plate 2111: Opening 212: Left side wall 2121: The First Opportunity 21211: First air vent 2122: First sliding part 2123: Third convex point 213: Right side wall 2131: The Second Opportunity 21311: Second air vent 2132: Second sliding part 2133: Fourth convex point 22: Light Source Module 23: Light source heat dissipation module 24: Fan Module 25: Lens 26: First Rib 27: Second rib 28: Sliding cover 281: Top cover 282: Left cover 2821: First convex point 2822: Second convex point 2823: First Fence Structure 283: Right cover 29: Third Rib 31: Fifth Rib 32: Sixth rib 33: First sensing element 34: Second sensor U1, U2: Open ends. Detailed Implementation

[0026] The foregoing and other technical contents, features, and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying views. The directional terms mentioned in the following embodiments (e.g., up, down, left, right, front, or back) are only for reference to the accompanying views. Therefore, the directional terms used are for illustrative purposes and not for limiting the present invention.

[0027] Figure 2 This is a three-dimensional schematic diagram of the projection device of the present invention. Figure 3A for Figure 2 A schematic diagram of the projection device with its sliding cover in the open position, and Figure 3B for Figure 2 A schematic diagram of the projection device with its sliding cover in the closed position.

[0028] Please also refer to Figure 2 , Figure 3A and Figure 3B The projection device 2 in this embodiment includes a housing 21, a light source module 22, a light source heat dissipation module 23, a fan module 24, a lens 25, two first ribs 26, two second ribs 27, and a sliding cover 28. The light source module 22, the light source heat dissipation module 23, the fan module 24, and the projection lens 25 are all disposed inside the housing 21. A heat pipe (not shown) is connected between the light source module 22 and the light source heat dissipation module 23 so that the heat emitted by the light source module 22 during operation can be further dissipated through the light source heat dissipation module 23. The fan module 24 is disposed adjacent to the light source heat dissipation module 23.

[0029] The housing 21 has a top plate 211, a left side wall 212, and a right side wall 213. The top plate 211 is connected to the left side wall 212 and the right side wall 213, and has an opening 2111. A lens 25 is disposed within the housing 21 and exposed by the opening 2111. Two first ribs 26 are disposed on the top plate 211, with the extension direction of the two first ribs 26 perpendicular to the left side wall 212 and the right side wall 213, and the opening 2111 is disposed between the two first ribs 26. A sliding cover 28 is slidably disposed on the housing 21, and the sliding cover 28 can be used to cover the opening 2111. Two second ribs 27 are disposed on the top cover body 281 of the sliding cover 28, with one of the two second ribs 27 located between the two first ribs 26. Specifically, the second rib 27 is located on the surface of the top cover body 281 facing the top plate 211.

[0030] The aforementioned sliding cover 28 can slide relative to the housing 21. When the sliding cover 28 is in the open position, the top cover 281 does not cover the lens 25, so the lens 25 is exposed by the opening 2111, thereby enabling image projection. When the sliding cover 28 is in the closed position, the top cover 281 covers the lens 25, and the two second ribs 27 abut against the corresponding two first ribs 26.

[0031] Since the two first ribs 26 and the two second ribs 27 are located between the top plate 211 of the housing 21 and the top cover 281 of the sliding cover 28, an airtight space is formed when the two second ribs 27 abut against the corresponding two first ribs 26, thereby preventing dust from entering from the gap between the housing 21 and the sliding cover 28.

[0032] In addition, the sliding cover 28 has a left cover 282 and a right cover 283, wherein the top cover 281 is connected to the left cover 282 and the right cover 283 respectively. The left cover 282 covers the left side wall 212 of the housing 21, and the right cover 283 covers the right side wall 213 of the housing 21.

[0033] Figure 4A for Figure 3A The side view, and Figure 4B for Figure 3B Side view. Please also refer to... Figure 2 , Figure 3A and Figure 4AThe projection device 2 also includes two third ribs 29 respectively disposed on the left cover 282 and right cover 283 of the sliding cover 28. One end of the two first ribs 26 extends from the top plate 211 to the left side wall 212, and the other end of the two first ribs 26 extends from the top plate 211 to the right side wall 213. The ends of the first ribs 26 extending to the side walls are located between the side walls and the covers; similarly, the third ribs 29 are located between the covers and the side walls. It should be further noted that one of the two third ribs 29 is disposed at the position of the right cover 283, which corresponds to the position of the other of the two third ribs 29 disposed at the left cover 282.

[0034] Please also refer to Figure 2 , Figure 3B and Figure 4B When the sliding cover 28 is in the closed position, the third rib 29 of the left cover 282 rests against one end of the two first ribs 26, and the third rib 29 of the right cover 283 rests against the other end of the two first ribs 26. The left cover 282, right cover 283, top cover 281, two first ribs 26, two second ribs 27, and two third ribs 29 seal the opening 2111 of the top plate 211. By having the ends of the first ribs 26 and the third ribs 29 rest against each other, dust can be prevented from entering through the gap between the left side wall 212, right side wall 213 of the housing 21 and the left and right covers 283 of the sliding cover 28.

[0035] As can be seen from the above, when the sliding cover 28 is in the closed position, the sliding cover 28, the top plate 211 of the housing 21, the left side wall 212 of the housing 21, the right side wall 213 of the housing 21, the first rib 26, the second rib 27 and the third rib 29 form a closed structure that can completely cover the opening 2111, thereby preventing dust from entering the interior of the housing 21 and affecting the operation of the internal components of the projection device 2.

[0036] Figure 5A and Figure 5B A schematic diagram showing ribs corresponding to the sliding cover and air outlet area of ​​the projection device. (See diagram) Figure 5A As shown, the projection device 2 also includes two fifth ribs 31 and two sixth ribs 32. The two fifth ribs 31 are respectively disposed on the left side wall 212 and the right side wall 213. The left side wall 212 has a first air vent 2121, and the fifth ribs 31 of the left side wall 212 surround the first air vent 2121. The right side wall 213 has a second air vent 2131, and the fifth ribs 31 of the right side wall 213 surround the second air vent 2131. The two sixth ribs 32 are respectively disposed on the left cover 282 and the right cover 283. Figure 5BAs shown, when the sliding cover 28 is in the closed position, the two sixth ribs 32 respectively abut against the corresponding fifth ribs 31. Specifically, the two fifth ribs 31 and the two sixth ribs 32 have a U-shaped structure, and the opening end U1 of the fifth rib 31 faces the opening end U2 of the sixth rib 32. Therefore, when the sliding cover 28 is in the closed position, each sixth rib 32 surrounds the corresponding fifth rib 31, and the opening end U1 of each fifth rib 31 abuts against the corresponding sixth rib 32 to form a sealed area. Therefore, the left cover 282, the sixth rib 32 of the left cover 282, and the fifth rib 31 of the left side wall 212 seal the first air vent 2121, and the right cover 283, the sixth rib 32 of the right cover 283, and the fifth rib 31 of the right side wall 213 seal the second air vent 2131. Please refer to the following: Figure 2 The first air vent 2121 and the second air vent 2131 have the same structural features, and the technical features of the fifth rib 31 of the left side wall 212 and the sixth rib 32 of the left cover 282 sealing the first air vent 2121 are the same as the technical features of the fifth rib 31 of the right side wall 213 and the sixth rib 32 of the right cover 283 sealing the second air vent 2131. Therefore, a separate schematic diagram of the fifth rib 31 of the right side wall 213 and the sixth rib 32 of the right cover 283 is not shown.

[0037] It should be further explained that when the fan module 24 is running, the airflow direction can be adjusted according to actual needs. For example, the first air vent 2121 can be used as an air inlet, and the second air vent 2131 can be used as an air outlet, but it is not limited to this.

[0038] The first rib 26, the second rib 27, the third rib 29, the fifth rib 31 and the sixth rib 32 mentioned above are made of elastic and low-porosity materials, such as rubber strips.

[0039] It is worth noting that, such as Figure 5C As shown, the fifth rib 31 can also be a U-shaped structure, while the sixth rib 32 can be an I-shaped structure. When the sliding cover 28 is in the closed position, the open end U1 of the fifth rib 31 rests against the corresponding sixth rib 32 to form a sealed area.

[0040] Figure 6 This is a schematic diagram showing the fitting of the sliding cover body to the side wall of the housing. The left cover body 282 has two first protrusions 2821, the right cover body 283 has two second protrusions 2822, the left side wall 212 has a first sliding part 2122, and the two first protrusions 2821 fit into the first sliding part 2122. The right side wall 213 has a second sliding part 2132, and the two second protrusions 2822 fit into the second sliding part 2132.

[0041] By fitting the aforementioned protrusions into the corresponding sliding parts, the sliding cover 28 can slide smoothly relative to the housing 21.

[0042] The aforementioned sliding part is a slide rail, which can be integrally formed on the side wall during the formation of the housing 21, or it can be separately assembled onto the housing 21. In the case where the slide rail is separately assembled onto the housing 21, the material of the slide rail can be different from the material of the housing 21, which is made of plastic, such as metal.

[0043] In addition, the first sliding part 2122 has two third protrusions 2123, which are respectively disposed at both ends of the first sliding part 2122, and the second sliding part 2132 has two fourth protrusions 2133, which are respectively disposed at both ends of the second sliding part 2132.

[0044] Figure 7A and Figure 7B This is a schematic diagram showing the protrusions on the cover and the sidewalls. Please also refer to... Figure 6 and Figure 7A When the sliding cover 28 is in the closed position, one of the first protrusions 2821 of the left cover 282 is engaged with one of the third protrusions 2123 of the first sliding part 2122, and one of the second protrusions 2822 of the right cover 283 is engaged with one of the fourth protrusions 2133 of the second sliding part 2132. Please also refer to... Figure 6 and Figure 7B When the sliding cover 28 is in the open position, one of the first protrusions 2821 of the left cover 282 is engaged with another of the third protrusions 2123 of the first sliding part 2122, and the other of the second protrusions 2822 of the right cover 283 is engaged with another of the fourth protrusions 2133 of the second sliding part 2132. It should be further noted that... Figure 7A and Figure 7B The technical feature shown is that the second protrusion 2822 of the right cover 283 can engage with the fourth protrusion 2133 of the second sliding part 2132. The technical feature of the same first protrusion 2821 of the left cover 282 engaging with the third protrusion 2123 of the first sliding part 2122 is not shown separately.

[0045] The third protrusion 2123 and the fourth protrusion 2133 interfere with the corresponding first protrusion 2821 and second protrusion 2822, thereby limiting the position of the sliding cover 28 relative to the housing 21.

[0046] Figure 8A A schematic diagram showing a projection device equipped with sensors and a sliding cover in the closed position. Figure 8B This is a schematic diagram showing a projection device equipped with sensors and a sliding cover in the open position. Please also refer to... Figure 2 , Figure 8A and Figure 8BThe projection device 2 also includes a first sensor 33 and a second sensor 34. The first sensor 33 is disposed on the left cover 282 or the right cover 283, and the second sensor 34 is disposed on the left side wall 212 or the right side wall 213. The first sensor 33 and the second sensor 34 are located on the same side of the housing 21, and the first sensor 33, the second sensor 34, or a combination thereof are connected to the fan module 24 inside the housing 21. Figure 8A As shown, when the sliding cover 28 is in the closed position, the first sensor 33 and the second sensor 34 do not overlap, and the fan module 24 is in the off state; Figure 8B As shown, when the sliding cover 28 is in the open position, the first sensor 33 and the second sensor 34 combine to start the fan module 24.

[0047] Specifically, in order to ensure the effectiveness of the opening 2111 covered by the sliding cover 28 and to prevent the cooling flow from flowing back due to the cover 28, which would cause dust to accumulate inside the casing 21, corresponding sensors are provided on the left cover 282 or right cover 283 of the sliding cover 28 and on the left side wall 212 or right side wall 213 of the casing 21. When the first sensor 33 and the second sensor 34 overlap, it indicates that the opening 2111 is not covered, and at this time the fan module 24 is activated to provide an active flow field.

[0048] The aforementioned sensors can be electromechanical contact devices, such as contact interlocking switches. When the first sensor 33 and the second sensor 34 overlap, one sensor presses the switch of the other sensor and feeds the information back to the notification system to start the fan module 24.

[0049] Alternatively, the sensor can be an inductive device, such as a magnetic induction type or a light induction type. When the sensor is a magnetic induction type, the fan module 24 can only be turned on after the detected magnetic field strength is greater than a certain value; while when the sensor is a light induction type, the fan module 24 can only be turned on after the receiver receives a specific spectrum from the transmitter.

[0050] The above-mentioned different types of sensors are only examples and are not intended to limit the types of sensors.

[0051] Figure 8C A schematic diagram showing the different placement positions of the sensor. Figures 8A to 8C It can be seen that, without affecting the functions of the first sensor 33 and the second sensor 34, the positions of the first sensor 33 and the second sensor 34 can be changed as needed.

[0052] Figure 9A and Figure 9B This is a schematic diagram showing a vent on the left side wall and a fence structure on the cover. Figure 9C and Figure 9D This is a schematic diagram showing a vent on the right side wall and a fence structure on the cover. Please also refer to... Figure 2 , Figure 9A , Figure 9B , Figure 9C and Figure 9D The sliding cover 28 can be a discontinuous structure without holes. Specifically, the areas of the sliding cover 28 corresponding to the first air vent 2121 and the second air vent 2131 can be set as a fence structure.

[0053] In detail, the left side wall 212 has a first air vent 2121 with multiple first air holes 21211, and the left cover 282 has a first fence structure 2823. The right side wall 213 has a second air vent 2131 with multiple second air holes 21311, and the right cover 283 has a second fence structure 2831.

[0054] like Figure 9A and Figure 9C As shown, when the sliding cover 28 is in the open position, the first grille structure 2823 exposes multiple first air vents 21211, and the second grille structure 2831 exposes multiple second air vents 21311; while as Figure 9B and Figure 9D As shown, when the sliding cover 28 is in the closed position, the first fence structure 2823 covers multiple first air vents 21211, and the second fence structure 2831 covers multiple second air vents 21311, wherein the fence structure completely covers the area of ​​the air vents.

[0055] In summary, in the projection device of the present invention, the sliding cover is slidably disposed on the housing. Therefore, when the lens is needed, the sliding cover can be slid along the housing to expose the opening of the top plate of the housing, so that the projection device can project an image; and when the lens is not needed, the sliding cover can be slid along the housing to cover the opening, thereby preventing dust from accumulating on the lens.

[0056] In addition, corresponding ribs are provided on the surfaces of the sliding cover and the housing that face each other. When the sliding cover is in the closed position, a closed space is formed by the cover of the sliding cover, the top plate of the housing, the left side wall of the housing, the right side wall of the housing, and the ribs that support each other, thereby preventing dust from entering the interior of the housing.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions described in the embodiments of the present invention.

Claims

1. A projection device, characterized in that, The projection device includes a housing, a lens, two first ribs, two second ribs, and a sliding cover; wherein... The housing has a top plate, a left side wall and a right side wall, the top plate is connected to the left side wall and the right side wall respectively, and the top plate has an opening; The lens is housed within the housing and exposed by the opening; The two first ribs are disposed on the top plate, the extension direction of the two first ribs is perpendicular to the left side wall and the right side wall, and the opening is disposed between the two first ribs; The sliding cover is slidably disposed on the housing and is used to cover the opening; The two second ribs are disposed on the top cover of the sliding cover, and one of the two second ribs is located between the two first ribs; The sliding cover is slidable relative to the housing. When the sliding cover is in the open position, the top cover does not obstruct the lens. When the sliding cover is in the closed position, the top cover obstructs the lens, and the two second ribs abut against the corresponding two first ribs.

2. The projection device according to claim 1, characterized in that, The sliding cover has a left cover and a right cover, and the top cover is connected to the left cover and the right cover respectively. The left cover covers the left side wall of the housing, and the right cover covers the right side wall of the housing.

3. The projection device according to claim 2, characterized in that, The projection device further includes two third ribs, which are respectively disposed on the left cover and the right cover of the sliding cover. One end of the two first ribs extends from the top plate to the left side wall, and the other end of the two first ribs extends from the top plate to the right side wall. When the sliding cover is in the closed position, the third rib of the left cover abuts against one end of the two first ribs, and the third rib of the right cover abuts against the other end of the two first ribs. The left cover, the right cover, the top cover, the two first ribs, the two second ribs, and the two third ribs close the opening of the top plate.

4. The projection device according to claim 2, characterized in that, The projection device further includes two fifth ribs and two sixth ribs, wherein the two fifth ribs are respectively disposed on the left side wall and the right side wall. The left side wall has a first air vent, and the fifth ribs of the left side wall surround the first air vent. The right side wall has a second air vent, and the fifth ribs of the right side wall surround the second air vent. The two sixth ribs are respectively disposed on the left cover and the right cover. When the sliding cover is in the closed position, the two sixth ribs respectively abut against the corresponding fifth ribs, and the left cover, the sixth ribs of the left cover, and the fifth ribs of the left side wall close the first air vent. The right cover, the sixth ribs of the right cover, and the fifth ribs of the right side wall close the second air vent.

5. The projection device according to claim 4, characterized in that, The two fifth ribs and the two sixth ribs have a U-shaped structure. When the sliding cover is in the closed position, the two sixth ribs surround the corresponding fifth ribs, and the open ends of the two fifth ribs abut against the corresponding sixth ribs.

6. The projection device according to claim 4, characterized in that, The two fifth ribs have a U-shaped structure. When the sliding cover is in the closed position, the open ends of the two fifth ribs abut against the corresponding sixth ribs.

7. The projection device according to claim 2, characterized in that, The left cover has two first protrusions, the right cover has two second protrusions, the left side wall has a first sliding portion, the two first protrusions are fitted into the first sliding portion, and the right side wall has a second sliding portion, the two second protrusions are fitted into the second sliding portion.

8. The projection device according to claim 7, characterized in that, The first sliding part has two third protrusions, which are respectively disposed at both ends of the first sliding part. The second sliding part has two fourth protrusions, which are respectively disposed at both ends of the second sliding part. When the sliding cover is in the closed position, one of the first protrusions is locked to one of the third protrusions, and one of the second protrusions is locked to one of the fourth protrusions. When the sliding cover is in the open position, the other of the first protrusions is locked to the other of the third protrusions, wherein the other of the second protrusions is locked to the other of the fourth protrusions.

9. The projection device according to claim 2, characterized in that, The projection device further includes a first sensor and a second sensor. The first sensor is disposed on the left cover or the right cover, and the second sensor is disposed on the left side wall or the right side wall. The first sensor and the second sensor are located on the same side of the housing, and the first sensor, the second sensor, or a combination thereof are connected to a fan module inside the housing. When the sliding cover is in the open position, the first sensor and the second sensor overlap and start the fan module.

10. The projection device according to claim 2, characterized in that, The left side wall has a first air vent with multiple first air holes, the left cover has a first fence structure, the right side wall has a second air vent with multiple second air holes, and the right cover has a second fence structure. When the sliding cover is in the closed position, the first fence structure covers the multiple first air holes, and the second fence structure covers the multiple second air holes.

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