Projector shading structure
By designing multiple light-shielding strips and filter structures in the projector and optimizing the airflow layout, the problems of light leakage and wind resistance in the new projector's light-shielding structure were solved, achieving efficient heat dissipation and stable light-shielding effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN YIXIN OPTOELECTRONICS CO LTD
- Filing Date
- 2025-04-28
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional projector light-shielding structures cannot adapt to the new air inlet and outlet layouts, resulting in light leakage problems. In addition, traditional light-shielding structures are insufficient in terms of wind resistance and air intake.
Design a light-shielding structure for a projector, which uses multiple light-shielding strips spaced apart along the light-emitting direction of the optical components. The light-shielding strips are tilted on the side closer to the lens components and the spacing gradually increases. Combined with a filter and a flanged part, the air duct layout is optimized to reduce wind resistance and block the light emitted by the optical components.
It effectively prevents light leakage from the projector, ensures airflow, improves heat dissipation efficiency, enhances light-blocking effect, and reduces wind resistance and production costs.
Smart Images
Figure CN224152829U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of projector technology, and in particular to a projector light-shielding structure. Background Technology
[0002] Currently, projectors on the market typically place the air inlets and outlets of their cooling ducts on both sides of the optical module for rapid heat dissipation. In these projectors, the fan guiding the airflow is located at either the inlet or outlet. Therefore, a light-shielding structure must be installed at the corresponding inlet or outlet to prevent light emitted from the optical components from leaking out of the projector. However, to further improve the projector's heat dissipation efficiency, some newer projectors are adopting a new airflow layout. In these projectors, the air inlets and outlets are located at the front and rear sides of the optical module (or the outlet is located at the rear of the circumferential side of the optical component), ensuring that the airflow between the inlet and outlet passes through the optical module axially and radially. This means that traditional light-shielding structures located on the sides of the optical module are no longer suitable for the new inlet layout, necessitating the design of a new light-shielding structure to prevent light leakage. Utility Model Content
[0003] The purpose of this invention is to provide a light-shielding structure for a projector that can block light while ensuring air intake, thus preventing light leakage from the projector.
[0004] To achieve this objective, the present invention adopts the following technical solution: a projector light-shielding structure, including a projector body and a centrifugal fan. The projector body includes a housing and a mounting frame. The mounting frame is located inside the housing. A lens assembly and an optical assembly are connected inside the mounting frame and arranged opposite to each other. The housing has an air inlet and an air outlet. The air inlet is located between the lens assembly and the optical assembly, and the air outlet is located on one side of the optical assembly. The centrifugal fan is installed on the mounting frame and located between the lens assembly and the optical assembly. The centrifugal fan is used to drive airflow sequentially through the air inlet, the optical assembly, and the air outlet. The mounting frame has multiple light-shielding strips, which are spaced apart along the light-emitting direction of the optical assembly. Along the light-emitting direction of the optical assembly, the side of the light-shielding strips closest to the lens assembly is inclined away from the air inlet, and the spacing between the multiple light-shielding strips gradually increases.
[0005] Preferably, a filter is installed between the light-shielding strip and the air inlet.
[0006] Preferably, the mounting bracket has a slot, the housing has an openable and closable socket communicating with the slot, and the filter screen is inserted into the slot.
[0007] Preferably, the sidewall of the slot is integrally formed with both ends of the plurality of light-shielding strips.
[0008] Preferably, the angle of inclination of the light-shielding strip closest to the optical component relative to the air inlet is smaller than the angle of inclination of the other light-shielding strips relative to the air inlet.
[0009] Preferably, the mounting bracket has a flanged portion that surrounds the air inlet and abuts against the inner wall of the housing.
[0010] Preferably, along the light-emitting direction of the optical component, the width of the light-shielding strip located at least partially in the middle is greater than the width of the light-shielding strips located at both ends.
[0011] Preferably, the light-shielding strip has a wind-facing angle on the side near the air inlet, and the cross-section of the wind-facing angle is triangular.
[0012] Preferably, the mounting bracket includes a first bracket and a second bracket. The first bracket has a plurality of first blocks, and the second bracket has a plurality of second blocks. The first blocks and the second blocks are spliced together to form the light-shielding strip.
[0013] Preferably, the outer diameter of the first block gradually decreases along the extension direction of the first block toward the second block.
[0014] The beneficial effects of this utility model are as follows: by setting multiple light-shielding strips with the spacing between them gradually increasing along the light-emitting direction, wind resistance can be reduced and the air intake flow of the centrifugal fan can be guaranteed. The side of the light-shielding strips near the lens assembly is tilted away from the air inlet. When the optical assembly emits light towards the lens assembly, the light-shielding strips can block the tilted light emitted by the optical assembly, thus preventing light leakage from the projector. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the internal structure of the projector's light-shielding structure according to an embodiment of the present invention;
[0016] Figure 2 This is a schematic diagram of the installation of the filter screen according to an embodiment of the present utility model;
[0017] Figure 3 This is a schematic diagram of the mounting bracket according to an embodiment of the present utility model;
[0018] Figure 4 This is a side view of the first bracket according to an embodiment of the present utility model;
[0019] Figure 5 This is a schematic diagram of the structure of the second support in an embodiment of the present invention.
[0020] In the diagram: 100, Projector body; 110, Outer shell; 111, Air inlet; 112, Air outlet; 113, Socket; 120, Mounting bracket; 121, Light shield; 1211, Windward angle; 122, Slot; 123, Flanged edge; 124, First bracket; 1241, First block; 125, Second bracket; 1251, Second block; 130, Lens assembly; 140, Optical assembly; 150, Filter; 200, Centrifugal fan. Detailed Implementation
[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0022] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0024] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0025] Reference Figures 1 to 5As shown, a projector light-shielding structure provided according to an embodiment of this application includes a projector body 100 and a centrifugal fan 200. The projector body 100 includes a housing 110 and a mounting bracket 120. The mounting bracket 120 is located inside the housing 110. A lens assembly 130 and an optical assembly 140 are connected inside the mounting bracket 120 and are arranged opposite to each other. Optionally, the lens assembly 130 includes a plurality of spaced concave and convex lenses. The optical assembly 140 includes a light source, a display panel, and two Fresnel lenses. The two Fresnel lenses are located on both sides of the display panel to filter stray light. The light source is arranged towards the display panel to project the image of the display panel onto the lens assembly 130.
[0026] The housing 110 is provided with an air inlet 111 and an air outlet 112. The air inlet 111 is located between the lens assembly 130 and the optical assembly 140, and the air outlet 112 is located on one side of the optical assembly 140. The centrifugal fan 200 is mounted on the mounting frame 120 and located between the lens assembly 130 and the optical assembly 140. The centrifugal fan 200 is used to drive the airflow to flow sequentially through the air inlet 111, the optical assembly 140 and the air outlet 112. The mounting frame 120 is provided with a plurality of light-shielding strips 121. The plurality of light-shielding strips 121 are spaced apart along the light-emitting direction of the optical assembly 140. Along the light-emitting direction of the optical assembly 140, the side of the light-shielding strips 121 near the lens assembly 130 is inclined away from the air inlet 111, and the spacing between the plurality of light-shielding strips 121 gradually increases.
[0027] Understandably, placing the air inlet 111 between the lens assembly 130 and the optical assembly 140, mounting the centrifugal fan 200 on the mounting bracket 120, and placing the air outlet 112 on one side of the optical assembly 140 can extend the air duct, increase the contact area between the air duct and the optical assembly 140, optimize the air duct layout, and improve heat dissipation efficiency. By setting multiple light-shielding strips 121, with the spacing of the multiple light-shielding strips 121 gradually increasing along the light emission direction, wind resistance can be reduced, ensuring the air intake flow of the centrifugal fan 200. The side of the light-shielding strips 121 near the lens assembly 130 is inclined away from the air inlet 111, which can avoid the problem of unsatisfactory light-shielding effect when the light-shielding strips 121 are arranged perpendicular to the light path, and also avoid the problem of air intake obstruction when the light-shielding strips 121 are arranged parallel to the light path. When the optical assembly 140 emits light towards the lens assembly 130, the light-shielding strips 121 can block the inclined light emitted by the optical assembly 140, preventing light leakage from the projector.
[0028] It should be added that the surface of the light-shielding strip 121 is also formed with an uneven reflective layer through chemical etching technology (or coating with reflective material), so that the light hitting the light-shielding strip 121 is diffused, thereby improving the reflective performance of the light-shielding strip 121.
[0029] Reference Figure 2As shown, it can be understood that the tilt angle of the light-shielding strip 121 closest to the optical component 140 relative to the air inlet 111 is smaller than the tilt angle of the other light-shielding strips 121 relative to the air inlet 111. In other words, the light-shielding strip 121 closest to the light source is straighter than the other light-shielding strips 121 and has a smaller angle with the light path.
[0030] Reducing the tilt angle of the light-shielding strip 121 closest to the optical component 140 can increase the projected area of the light-shielding strip 121 on the projection surface in the direction parallel to the light path, thereby blocking more light rays that have just been emitted from the optical component 140 and enhancing the light-shielding effect of the light-shielding strip 121.
[0031] Reference Figure 3 As shown, the mounting bracket 120 includes a first bracket 124 and a second bracket 125. The first bracket 124 has multiple first blocks 1241, and the second bracket 125 has multiple second blocks 1251. The first bracket 124 and the second bracket 125 are detachably connected by bolt structures, locking block and slot structures, tenon and mortise structures, etc. The first blocks 1241 and the second blocks 1251 are spliced together to form a light-shielding strip 121. Optionally, the first bracket 124 or the second bracket 125 can be integrally formed with part of the outer shell 110.
[0032] By setting the first bracket 124 and the second bracket 125, the mounting bracket 120 can be easily processed and formed, and the problem of the single light-shielding strip 121 being too long, having low structural strength, and being easily broken by the incoming air can be avoided, thereby improving the structural stability of the light-shielding strip 121.
[0033] Reference Figure 1 As shown, it can be understood that a filter 150 is installed between the light-shielding strip 121 and the air inlet 111, and the filter 150 covers the light-shielding strip 121.
[0034] By setting up the filter 150, on the one hand, the filter 150 can filter dust and impurities in the air at the air inlet, preventing dust and impurities from accumulating in the mounting bracket 120 and affecting the projection quality; on the other hand, the filter 150 and the light shield 121 work together to further block the oblique light emitted from the optical component 140, ensuring that there is no light leakage at the air inlet 111.
[0035] Reference Figure 1 , Figure 3 and Figure 5As shown, it can be understood that the mounting bracket 120 is provided with a slot 122. The slot 122 includes a first groove symmetrically arranged on the first bracket 124 along the optical path direction and a second groove arranged on the second bracket 125 between the two first grooves. The housing 110 is provided with an openable and closable socket 113 communicating with the slot 122. Specifically, the housing 110 is connected with a detachable bar, and the bar can cover the socket 113. The filter screen 150 is inserted and cooperated with the slot 122.
[0036] By providing the slot 122, the user can remove the bar and then quickly insert or remove the filter screen 150, effectively improving the convenience of loading and unloading the filter screen 150.
[0037] Refer to Figure 5 As shown, it can be understood that the side walls of the slot 122 and both ends of the plurality of light-shielding strips 121 are integrally formed. Specifically, the side wall part of the second groove of the slot 122 on the second bracket 125 is integrally formed with the second block 1, and the side wall of the opening part of the slot 122 on the first bracket 124 is integrally formed with the first block 1241. <<
[0038] Setting both ends of the light-shielding strip 121 to be integrally formed with the side wall of the slot 122 can increase the contact area between the root of the first block 1241 and the first bracket 124 and the contact area between the root of the second block 1251 and the second bracket 125, further improving the structural stability of the light-shielding strip 121.
[0039] Refer to Figure 3 As shown, it can be understood that the mounting bracket 120 is provided with a flanging part 123, and the flanging part 123 protrudes along the direction away from the light-shielding strip 121. The flanging part 123 is arranged around the air inlet 111 and abuts against the inner wall of the housing 110.
[0040] By providing the flanging part 123, the flanging part 123 abuts against the inner wall of the housing 110, which can separate the air inlet 111 and the internal space of the housing 110, avoiding the air leakage problem caused by part of the air flowing into the gap between the housing 110 and the mounting bracket 120 when the centrifugal fan 200 intakes air, ensuring the air intake volume of the centrifugal fan 200, and also avoiding light leakage at the joint between the housing 110 and the mounting bracket 120 of the projector.
[0041] Furthermore, a windward angle 1211 is provided on one side of the light-shielding strip 121 close to the air inlet 111, and the cross-section of the windward angle 1211 is triangular.
[0042] By setting the windward angle 1211 with a triangular cross-section, the windward angle 1211 can reduce the contact area between the light-shielding strip 121 and the air, guide the air to quickly enter the mounting bracket 120, which is beneficial to reducing the wind resistance. On the premise of ensuring light shielding, the wind resistance is further reduced and the impact on the light-shielding strip 121 is reduced.
[0043] Refer to Figure 4 As shown, it can be understood that along the light-emitting direction of the optical component 140, the width of at least part of the light-shielding strip 121 in the middle is greater than the width of the light-shielding strips 121 at both ends. Specifically, along the light-emitting direction, the width of the light-shielding strip 121 gradually increases from the back to the front (the light-shielding strip 121 with a smaller inclination angle at the rearmost end can be regarded as a light-shielding strip 121 with a smaller width in the air inlet direction) until the second light-shielding strip 121 from the front side, and the width of the light-shielding strip 121 at the forefront is smaller to avoid structures such as reinforcing ribs.
[0044] Setting the width of the light-shielding strip 121 in the middle wider can block the gradually increasing gaps between the multiple light-shielding strips 121 with gradually increasing spacing, and avoid light at a specific angle from leaking out through the gaps between the light-shielding strips 121 with a larger spacing.
[0045] Refer to Figure 1 and Figure 3 As shown, it can be understood that along the extension direction of the first block 1241 towards the second block 1251, the outer diameter of the first block 1241 gradually decreases. Similarly, along the extension direction of the second block 1251 towards the first block 1241, the outer diameter of the second block 1251 gradually decreases.
[0046] By setting the gradually decreasing outer diameters of the first block 1241 and the second block 1251, it is convenient for the first block 1241 and the second block 1251 to be demolded, ensuring a smooth surface when the first block 1241 and the second block 1251 are formed, and then facilitating the subsequent processing of the reflective layer, reducing the production cost of the light-shielding strip 121.
[0047] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.
Claims
1. A light blocking structure for a projector, characterized by, include: The projector body (100) includes a housing (110) and a mounting bracket (120). The mounting bracket (120) is located inside the housing (110). A lens assembly (130) and an optical assembly (140) are connected inside the mounting bracket (120) and are arranged opposite to each other. The housing (110) is provided with an air inlet (111) and an air outlet (112). The air inlet (111) is located between the lens assembly (130) and the optical assembly (140), and the air outlet (112) is located on one side of the optical assembly (140). A centrifugal fan (200) is mounted on the mounting bracket (120) and located between the lens assembly (130) and the optical assembly (140). The centrifugal fan (200) is used to drive airflow sequentially through the air inlet (111), the optical assembly (140) and the air outlet (112). The mounting bracket (120) is provided with a plurality of light-shielding strips (121). The plurality of light-shielding strips (121) are spaced apart along the light-emitting direction of the optical component (140). Along the light-emitting direction of the optical component (140), the side of the light-shielding strip (121) near the lens component (130) is inclined away from the air inlet (111), and the spacing between the plurality of light-shielding strips (121) gradually increases.
2. The projector light shield structure of claim 1, wherein, A filter (150) is installed between the light-shielding strip (121) and the air inlet (111).
3. The projector light shield structure of claim 2, wherein, The mounting bracket (120) is provided with a slot (122), the housing (110) is provided with an openable and closable socket (113) communicating with the slot (122), and the filter (150) is inserted into the slot (122).
4. The projector light shield structure of claim 3, wherein, The sidewall of the slot (122) is integrally formed with the two ends of the plurality of light-shielding strips (121).
5. The projector light shield structure of claim 1, wherein, The angle of inclination of the light-shielding strip (121) closest to the optical component (140) relative to the air inlet (111) is smaller than the angle of inclination of the other light-shielding strips (121) relative to the air inlet (111).
6. The projector light shield structure of claim 1, wherein, The mounting bracket (120) is provided with a flange (123), which is arranged around the air inlet (111) and abuts against the inner wall of the outer casing (110).
7. The projector light shield structure of claim 1, wherein, Along the light-emitting direction of the optical component (140), the width of the light-shielding strip (121) located at least partially in the middle is greater than the width of the light-shielding strips (121) located at both ends.
8. The projector light shield structure of claim 1, wherein, The light-shielding strip (121) has a wind-facing angle (1211) on the side near the air inlet (111), and the cross section of the wind-facing angle (1211) is triangular.
9. The projector light shield structure of claim 1, wherein, The mounting bracket (120) includes a first bracket (124) and a second bracket (125). The first bracket (124) is provided with a plurality of first blocks (1241), and the second bracket (125) is provided with a plurality of second blocks (1251). The first blocks (1241) and the second blocks (1251) are spliced together to form the light-shielding strip (121).
10. The projector light shield structure of claim 9, wherein, The outer diameter of the first block (1241) gradually decreases in a direction along the extending direction of the first block (1241) toward the second block (1251).