Semi-horizontal closed light machine

Abstract

The utility model discloses a semi-horizontal closed light machine, which comprises a base, an optical assembly, a first radiator and a sealing cover. In the closed light machine, a bottom plate of a base separates a lower cavity from a light path cavity, and the lower cavity and the light path cavity are communicated through a first through hole and a second through hole. Internal circulation air flow is formed by the first fan and sequentially flows through the lower cavity, the second through hole, the light path cavity and the first through hole, the air flow flows through the cooling fins in the light path cavity, heat of the internal circulation air flow can be effectively transmitted to the first radiator, and the heat is dissipated through the cooling fins, located outside the light path cavity, of the first radiator. According to the semi-horizontal closed ray machine, regular circulating air flow flowing through the radiating fins can be formed, so that the heat transfer efficiency of the inner cavity of the light path cavity and the radiating fins is greatly improved, the radiating effect of the ray machine is improved, and the problems that optical elements are damaged, the performance is reduced, the service life is shortened and the service life is shortened due to the poor radiating effect are solved. And the reliability and the stability of the whole projection system are even influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of projector optical engines, in particular to a semi-horizontal sealed optical engine. Background Art

[0002] A projector is a device that can project images or videos onto a screen. With the development of the times, projectors are increasingly used in people's daily work and life. The optical engine is one of the core components of a projector, responsible for projecting the light generated by the light source onto the screen through a series of optical components to form an image. The main function of the optical engine is to modulate the light into an image, magnify it, and then project it onto the screen through a lens.

[0003] After dust enters the optical system, it will affect the transmission of light, resulting in blurred images, reduced brightness, and decreased contrast. Therefore, in existing optical engines, the core components (such as lenses, mirrors, prisms, display screens, etc.) are usually sealed to prevent dust accumulation, thereby maintaining the performance of the optical system and the image quality, that is, the key optical components are arranged in a sealed optical path cavity. Since the optical engine mainly generates heat during operation, the temperature in the sealed optical path cavity rises rapidly, and due to the sealed space, the heat dissipation effect is poor, which easily leads to damage to the optical components, reduced performance, shortened lifespan, and even affects the reliability and stability of the entire projection system. Therefore, a semi-horizontal sealed optical engine is proposed. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a semi-horizontal sealed optical engine to solve the above problems.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A semi-horizontal sealed optical engine, comprising:

[0007] A base, the base comprising a bottom plate and a vertical plate;

[0008] An optical component, arranged on the bottom plate, the optical component comprising a reflector cup;

[0009] A first radiator, comprising a substrate arranged on the bottom plate and heat sinks arranged on both sides of the substrate;

[0010] A sealing cover, comprising an upper cover and a lower cover, the upper cover is arranged on the vertical plate and encloses a sealed optical path cavity with the base, the substrate, and the inner wall of the reflector cup, and the optical component is arranged in the optical path cavity; the lower cover is arranged on the lower end surface of the bottom plate and encloses a lower cavity with the bottom plate;

[0011] Wherein, a first through hole and a second through hole are provided between the lower cavity and the optical path cavity. The first through hole corresponds to the heat sink, and a first fan is arranged in the lower cavity to form an internal circulation air flow surrounding the optical path cavity and the lower cavity.

[0012] Optionally, the semi-horizontal closed optical machine further includes a second fan and a second radiator arranged on the bottom plate. The second radiator is arranged on one side of the air outlet of the second fan, and both the second fan and the second radiator are arranged outside the optical path cavity.

[0013] Optionally, the second fan is an LED heat dissipation fan, and the second radiator is an LED radiator.

[0014] Optionally, the optical component further includes a light source, a display screen and a lens; the light source is arranged at the focus of the reflector cup, the display screen is arranged on one side of the light outlet of the reflector cup, and the lens is arranged on the side of the display screen away from the reflector cup.

[0015] Optionally, the optical component further includes a heat insulation sheet, which is arranged between the reflector cup and the display screen, and both the display screen and the heat insulation sheet are located above the second through hole.

[0016] Optionally, the optical component further includes a first Fresnel lens and a second Fresnel lens. The first Fresnel lens is arranged between the reflector cup and the heat insulation sheet, and the second Fresnel lens is arranged between the display screen and the lens.

[0017] Optionally, the optical component further includes a reflector, which is arranged at an angle with the second Fresnel lens, and the lens is arranged at the reflection angle of the reflector.

[0018] Optionally, the semi-horizontal closed optical machine further includes a sound cavity, which is arranged on the bottom plate and outside the optical path cavity.

[0019] Compared with the prior art, the utility model has the following beneficial effects: When the optical engine works, the optical components form an optical path and project it onto an external screen. The sealed optical engine of the utility model can effectively prevent dust from entering the optical path and affecting the transmission of light by arranging the optical components in a sealed optical path cavity. At the same time, the bottom plate of the base separates the lower cavity from the optical path cavity and communicates them through the first through hole and the second through hole. The internal circulation air flow formed by the first fan flowing through the lower cavity, the second through hole, the optical path cavity and the first through hole in sequence, and this air flow flows through the heat sink in the optical path cavity, can effectively transfer the heat of the internal circulation air flow to the first radiator, and dissipate the heat through the heat sink located outside the optical path cavity of the first radiator. For the existing optical engine with the fan directly arranged in the optical path cavity, it cannot form a regular circulating air flow flowing through the heat sink. The utility model can form a regular internal circulation air flow (flowing through the lower cavity, the second through hole, the optical path cavity and the first through hole in sequence) flowing through the heat sink, greatly increasing the heat transfer efficiency between the inner cavity of the optical path cavity and the heat sink, thereby improving the heat dissipation effect of the optical engine, and further solving the technical problems such as damage of optical elements, reduction of performance, shortening of service life caused by poor heat dissipation effect, and even affecting the reliability and stability of the entire projection system. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0021] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limited conditions for the implementation of the present utility model. Therefore, they do not have technical essence. Any modification of the structure, change of the ratio relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed by the present utility model.

[0022] Figure 1 It is a schematic structural diagram of the semi-horizontal sealed optical engine of the present utility model;

[0023] Figure 2 It is an exploded view of the semi-horizontal sealed optical engine of the present utility model;

[0024] Figure 3 It is a front view of the semi-horizontal sealed optical engine of the present utility model;

[0025] Figure 4 For Figure 3Cross-sectional view along A-A;

[0026] Illustration: 10, base; 11, bottom plate; 12, vertical plate; 20, optical component; 21, light source; 22, reflector cup; 23, display screen; 24, lens; 25, heat insulation sheet; 26, first Fresnel lens; 27, second Fresnel lens; 28, mirror; 30, first radiator; 31, substrate; 32, heat sink; 40, sealing cover; 41, upper cover; 411, first cover body; 412, second cover body; 413, third cover body; 42, lower cover; 50, first fan; 60, second fan; 70, second radiator; 80, sound cavity; 90, auxiliary cover plate. Detailed implementation manners

[0027] In order to make the invention purposes, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the embodiments described below are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be intermediate components present at the same time.

[0029] The technical solutions of the present utility model will be further described below with reference to the accompanying drawings and through specific implementation manners.

[0030] Refer to Figures 1 to 4, an embodiment of the present utility model provides a semi - horizontal closed optical machine, which includes a base 10, an optical component 20, a first radiator 30, and a sealing cover 40. The base 10 includes a bottom plate 11 and a vertical plate 12, and several mounting positions are provided on the bottom plate 11. The optical component 20 is arranged on the bottom plate 11, and its function is to form an optical path and project it onto an external screen. The optical component 20 includes a reflector cup 22. The first radiator 30 includes a substrate 31 arranged on the bottom plate 11 and heat sinks 32 arranged on both sides of the substrate 31, and the substrate 31 is perpendicular to the bottom plate 11. The sealing cover 40 includes an upper cover 41 and a lower cover 42. The upper cover 41 is covered on the vertical plate 12, and together with the base 10, the inner walls of the substrate 31 and the reflector cup 22, it encloses a closed optical path cavity. The optical component 20 is arranged in the optical path cavity to prevent dust from entering and affecting the transmission of light. It should be noted that the substrate 31 of the first radiator 30 is part of the enclosed optical path cavity, that is, among the heat sinks 32 on both sides of the substrate 31, one side of the heat sink 32 is located inside the optical path cavity, and the other side of the heat sink 32 is located outside the optical path cavity. When dissipating heat from the optical path cavity, the heat sink 32 inside the optical path cavity and the inner side of the substrate 31 are both in contact with the high - temperature gas inside the optical path cavity and undergo heat exchange, thereby improving the heat dissipation effect. The lower cover 42 has a receiving cavity, and the upper end of the receiving cavity is open. The lower cover 42 is arranged on the lower end surface of the bottom plate 11 and encloses a lower cavity with the bottom plate 11. That is, the optical path cavity is located on one side of the bottom plate 11, and the lower cavity is located on the other side of the bottom plate 11. A first through - hole and a second through - hole (not shown in the figure) are provided between the lower cavity and the optical path cavity. The first through - hole corresponds to the heat sink 32, so that the air flow passing through the first through - hole also passes through the heat sink 32. At the same time, there is a certain distance between the first through - hole and the second through - hole. A first fan 50 is arranged in the lower cavity. Due to the certain distance between the first through - hole and the second through - hole, when the first fan 50 works, the first through - hole and the second through - hole serve as the air inlet and outlet of the lower cavity respectively. That is, when the first fan 50 works, it can form an internal circulation air flow around the optical path cavity and the lower cavity for the air inside the optical path cavity.

[0031] Specifically, when the optical engine is operating, the optical component 20 forms an optical path that projects onto an external screen. The sealed optical engine of the present utility model can effectively prevent dust from entering the optical path and affecting the transmission of light by disposing the optical component 20 in a sealed optical path cavity. At the same time, the bottom plate 11 of the base 10 separates the lower cavity from the optical path cavity and communicates them through the first through-hole and the second through-hole. The internal circulation air flow formed by the first fan 50 that sequentially flows through the lower cavity, the second through-hole, the optical path cavity, and the first through-hole, and this air flow flows through the heat sink 32 in the optical path cavity, can effectively transfer the heat of the internal circulation air flow to the first radiator 30, and dissipate the heat through the heat sink 32 of the first radiator 30 located outside the optical path cavity. For the existing optical engine with a fan directly disposed in the optical path cavity, it cannot form a regular circulation air flow flowing through the heat sink 32. The present utility model can form a regular internal circulation air flow (sequentially flowing through the lower cavity, the second through-hole, the optical path cavity, and the first through-hole) flowing through the heat sink 32, greatly increasing the heat transfer efficiency between the inner cavity of the optical path cavity and the heat sink 32, thereby improving the heat dissipation effect of the optical engine, and further solving the technical problems such as damage to optical elements, performance degradation, shortened lifespan, and even affecting the reliability and stability of the entire projection system due to poor heat dissipation effect.

[0032] Furthermore, the semi-horizontal sealed optical engine further includes a second fan 60 and a second radiator 70 disposed on the bottom plate 11. The second radiator 70 is disposed on one side of the air outlet of the second fan 60, and both the second fan 60 and the second radiator 70 are disposed outside the optical path cavity. Optionally, the second fan 60 is an LED cooling fan, and the second radiator 70 is an LED radiator. The main reason for using the LED cooling fan and the LED radiator is that the LED cooling fan and the LED radiator are more focused on solving the high heat problem of LED devices in terms of design and function, and have higher heat dissipation efficiency, more optimized materials and structures, and characteristics more suitable for specific application scenarios.

[0033] The optical component 20 further includes a light source 21, a display screen 23, a lens 24, a heat insulation sheet 25, a first Fresnel lens 26, and a second Fresnel lens 27. The light source 21 is disposed at the focus of the reflector cup 22, and the first Fresnel lens 26, the heat insulation sheet 25, the display screen 23, the second Fresnel lens 27, and the lens 24 are sequentially disposed on one side of the light outlet of the reflector cup 22, and the first Fresnel lens 26, the heat insulation sheet 25, the display screen 23, and the second Fresnel lens 27 are parallel to each other. The light source 21 in the embodiment of the present utility model is an LED light source 21.

[0034] Specifically, the light source 21 provides light rays, which are irradiated onto the reflector cup 22; the reflector cup 22 collects and concentrates the light rays from the light source 21 and reflects them to the first Fresnel lens 26; the first Fresnel lens 26 corrects and focuses the light rays concentrated by the reflector cup 22, enabling the light rays to uniformly irradiate the display screen 23; during the process of the light rays irradiating from the first Fresnel lens 26 to the display screen 23, they pass through the heat insulation sheet 25, and the heat insulation sheet 25 isolates and absorbs the excess heat generated by the light source 21, protecting the subsequent optical components 20 from the influence of high temperature; the display screen 23 modulates the light rays according to the input image signal, forms the final image, and irradiates the light rays to the second Fresnel lens 27; the second Fresnel lens 27 corrects and focuses the light rays coming out of the display screen 23 again, enabling them to enter the lens 24 at a suitable angle and direction; the lens 24 finally projects the modulated, corrected, and reflected light rays onto the screen to form a visible image.

[0035] In the above light ray transmission route, the light rays are transmitted almost in a straight line, which will result in a longer length of the optical engine. Therefore, the optical component 20 further includes a reflector 28, the reflector 28 is arranged at an angle with the second Fresnel lens 27, and the lens 24 is arranged at the reflection angle of the reflector 28. The reflector 28 makes the entire optical system more compact by folding the optical path, saves the device space, and at the same time maintains the optical performance.

[0036] Furthermore, both the heat insulation sheet 25 and the display screen 23 are located above the second through hole. In the optical engine, since the heat insulation sheet 25 isolates and absorbs the excess heat generated by the light source 21, and the display screen 23 modulates the light rays according to the input image signal, the temperatures of the heat insulation sheet 25 and the display screen 23 themselves will rise rapidly. The second through hole is located below them, enabling the internal circulating air flow to flow through their surfaces, and quickly taking their heat to the heat sink 32, thereby improving the heat dissipation efficiency.

[0037] It should be noted that the first heat sink 30 is located on the back of the reflector 28, ensuring the heat dissipation efficiency while not affecting the light ray transmission; the upper cover 41 includes a first cover body 411, a second cover body 412, and a third cover body 413. The first cover body 411 covers above the lens 24, the reflector 28, and the second Fresnel lens 27; the second cover body 412 covers above the first Fresnel lens 26, the heat insulation sheet 25, and the display screen 23; the third cover body 413 covers above the light source 21 and the reflector cup 22. By splitting the upper cover 41 into multiple cover bodies, it is convenient to maintain the optical component 20.

[0038] The semi - horizontal closed optical engine further includes a sound cavity 80 arranged on the bottom plate 11 and an auxiliary cover plate 90 arranged on the upper cover 41. The sound cavity 80 is arranged on the side of the optical path cavity away from the second cooling fan. The main function of the sound cavity 80 is to optimize the sound output, enabling the projector to have better volume and sound quality when playing audio. The main function of the auxiliary cover plate 90 is for safety warning.

[0039] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A semi-horizontal enclosed optical machine, characterized in that: include: A base (10), the base (10) comprising a bottom plate (11) and a vertical plate (12); An optical component (20) is disposed on the bottom plate (11), wherein the optical component (20) comprises a reflective cup (22); A first heat sink (30) comprising a base plate (31) arranged on the bottom plate (11) and heat sinks (32) arranged on both sides of the base plate (31); A sealing cover (40) comprising an upper cover (41) and a lower cover (42), wherein the upper cover (41) is arranged on the vertical plate (12) and is combined with the base (10), the substrate (31) and the inner wall of the reflective cup (22) to form a closed optical path cavity, and the optical component (20) is arranged in the optical path cavity; The lower cover (42) is arranged on the lower end surface of the bottom plate (11) and is combined with the bottom plate (11) to form a lower cavity; A first through hole and a second through hole are provided between the lower cavity and the optical path cavity, the first through hole corresponds to the heat sink (32), and a first fan (50) is provided in the lower cavity to form an internal circulation airflow surrounding the optical path cavity and the lower cavity.

2. The semi-horizontal sealed optical machine according to claim 1, characterized in that: It also comprises a second fan (60) and a second heat sink (70) arranged on the bottom plate (11); the second heat sink (70) is arranged on one side of an air outlet of the second fan (60); and the second fan (60) and the second heat sink (70) are both arranged outside the optical path cavity.

3. The semi-horizontal sealed optical machine according to claim 2, characterized in that: The second fan (60) is an LED heat dissipation fan, and the second heat sink (70) is an LED heat sink.

4. The semi-horizontal sealed optical machine according to claim 1, characterized in that: The optical component (20) further comprises a light source (21), a display screen (23) and a lens (24); the light source (21) is arranged at the focal point of the reflective cup (22), the display screen (23) is arranged on one side of the light outlet of the reflective cup (22), and the lens (24) is arranged on a side of the display screen (23) away from the reflective cup (22).

5. The semi-horizontal sealed optical machine according to claim 4, characterized in that: The optical component (20) further comprises a heat insulating sheet (25), wherein the heat insulating sheet (25) is arranged between the reflective cup (22) and the display screen (23), and the display screen (23) and the heat insulating sheet (25) are both located above the second through hole.

6. The semi-horizontal sealed optical machine according to claim 5, characterized in that: The optical assembly (20) further comprises a first Fresnel lens (26) and a second Fresnel lens (27); the first Fresnel lens (26) is arranged between the reflective cup (22) and the heat insulating sheet (25); and the second Fresnel lens (27) is arranged between the display screen (23) and the lens (24).

7. The semi-horizontal sealed optical machine according to claim 6, characterized in that: The optical component (20) further comprises a reflector (28), wherein the reflector (28) and the second Fresnel lens (27) are arranged at an angle, and the lens (24) is arranged at the reflection angle of the reflector (28).

8. The semi-horizontal sealed optical machine according to claim 1, characterized in that: It also comprises a sound cavity (80), wherein the sound cavity (80) is arranged on the bottom plate (11) and outside the optical path cavity.

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