Projection device

Abstract

The utility model discloses projection equipment, which comprises a shell, a light machine, a sound cavity and a water cooling device, the shell is provided with an air outlet, the water cooling device comprises a heat conducting plate and a radiator which are communicated with each other, the heat conducting plate is connected with the light machine, the air outlet side of the radiator faces the air outlet, the sound cavity is fixedly connected with the radiator, and the sound cavity is fixedly connected with the radiator. And the sound cavity and the optical machine are arranged at an interval. The projection equipment provided by the utility model can realize a good damping effect.

Description

Technical Field

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

[0002] Projection devices are popular in the consumer electronics market due to their portability, large screen size, and high brightness. However, because of their light weight, the internal components such as fans and sound chambers vibrate noticeably during operation. This vibration is easily transmitted to the optical engine, causing visible shaking in the projected image, which significantly affects the user's viewing experience.

[0003] Generally, during operation, the sound cavity transmits vibrations to the support through contact transmission. The vibration energy is then transmitted to the optical engine through the support. The common solution in the prior art is to place a silicone pad at the connection between the sound cavity and the support to absorb some of the vibrations, but the damping effect is limited. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model proposes a projection device that can achieve good shock absorption effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model discloses a projection device, including a housing, an optical engine, a sound cavity, and a water cooling device. The housing has an air outlet. The water cooling device includes a heat-conducting plate and a radiator connected in communication. The heat-conducting plate is connected to the optical engine. The air outlet side of the radiator faces the air outlet. The sound cavity is fixedly connected to the radiator and is spaced apart from the optical engine.

[0007] Preferably, the projection device further includes a rigid support member, and the sound cavity and the cooling radiator are respectively fixed on the rigid support member.

[0008] Preferably, the projection device further includes a bracket, the optical engine is fixed on the bracket, the bracket is fixedly connected to the rigid support member, and both the optical engine and the bracket are located above the rigid support member.

[0009] Preferably, the rigid support includes a base plate, the base plate protruding upward to form a first mounting plate, the sound cavity is fixed on the first mounting plate, and the radiator is fixed on the base plate.

[0010] Preferably, the base plate further protrudes upward to form a second mounting plate, the top of the second mounting plate being higher than the first mounting plate, the bottom of the bracket being fixed to the top of the second mounting plate, and the distance between the first mounting plate and the radiator being less than the distance between the second mounting plate and the radiator.

[0011] Preferably, the upper end of the acoustic cavity is fixed to the bracket, and the lower end is fixed to the rigid support.

[0012] Preferably, the water cooling device further includes a pump body and multiple pipe sections, which are respectively connected between any two of the heat-conducting plate, the pump body, and the radiator. The heat-conducting plate, the pump body, and the radiator are connected through the pipes, and the pump body is fixed on the bracket.

[0013] Preferably, the water cooling device further includes a water tank, which is connected to the radiator and is fixed to the radiator.

[0014] Preferably, the optomechanic includes a light source and a light modulator, and the heat-conducting plate is connected to the light source and / or the light modulator.

[0015] Preferably, the projection device further includes a fan, which is fixed to the radiator and located between the radiator and the optical engine, and is spaced apart from the optical engine.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: The projection device proposed by this utility model introduces a water cooling device. By fixing the sound cavity to the cooling radiator in the water cooling device and setting the sound cavity and the optical engine at intervals, part of the vibration of the sound cavity is transmitted to the water cooling device and absorbed by the liquid medium therein, so as to achieve a good vibration reduction effect.

[0017] In a further embodiment, this utility model also has the following beneficial effects:

[0018] (1) The acoustic cavity is fixed to the first mounting plate formed by the upward protrusion of the bottom plate of the rigid support member, the cold plate is fixed to the bottom plate, the bracket is fixedly connected to the second mounting plate formed by the upward protrusion of the bottom plate of the rigid support member, and the optical engine is fixed to the bracket. The first mounting plate is closer to the cold plate than the second mounting plate. On the one hand, this allows the vibration of the acoustic cavity to be transmitted to the cold plate more quickly. On the other hand, it further reduces the vibration transmission between the optical engine and the acoustic cavity.

[0019] (2) The water cooling device also includes a water tank, which can increase the volume of the liquid medium at the radiator and improve the buffering capacity. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the projection device according to a preferred embodiment of the present invention;

[0021] Figure 2 yes Figure 1 A schematic diagram of the internal structure of a projection device;

[0022] Figure 3 yes Figure 1An exploded view of the sound cavity, water cooling device, and rigid support frame of the projection equipment;

[0023] Figure 4 yes Figure 1 A schematic diagram of the internal structure of a projection device from the bottom view.

[0024] Figure 5 yes Figure 1 A schematic diagram showing the connection between the acoustic cavity, water cooling device, and rigid support frame of a projection device.

[0025] Figure 6 yes Figure 5 Enlarged diagram of point A in the middle.

[0026] Explanation of icon numbers:

[0027] 10. Outer shell; 20. Optical engine; 30. Sound chamber; 40. Water cooling device; 41. Heat conduction plate; 42. Pipe; 43. Pump body; 44. Cooling radiator; 45. Water tank; 50. Rigid support; 51. Base plate; 511. Fixing hole; 512. Air outlet; 52. First mounting plate; 53. Second mounting plate; 60. Bracket; 70. Fan. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. It should be emphasized that the following description is merely exemplary and not intended to limit the scope and application of this utility model.

[0029] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be used for both fixing and circuit / signal connectivity.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, 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.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In the preferred embodiment of the present invention, a water-cooling device is introduced into the projection device. By directly or indirectly connecting the sound cavity to the water-cooling device, part of the vibration energy of the sound cavity is transferred to the water-cooling device and absorbed by the liquid medium (coolant) therein, thereby achieving vibration reduction.

[0033] like Figure 1 and Figure 2 As shown, a preferred embodiment of this utility model discloses a projection device, including a housing 10, an optical engine 20, a sound cavity 30, and a water-cooling device 40. The housing 10 has an air outlet (not shown in the figure). In this embodiment, the air outlet of the housing 10 is located at the bottom of the housing 10. Figure 3 The water-cooling device 40 includes a heat-conducting plate 41, multiple pipe sections 42, a pump body 43, and a radiator 44 connected in series. The multiple pipe sections 42 are connected between any two of the heat-conducting plate 41, pump body 43, and radiator 44, and are interconnected via the pipe sections 42. The heat-conducting plate 41 is connected to the optical engine 20. The air outlet side of the radiator 44 faces the air outlet. The acoustic cavity 30 is fixedly connected to the radiator 44, and the acoustic cavity 30 is spaced apart from the optical engine 20. This structural arrangement ensures that the vibration of the acoustic cavity 30 is not directly transmitted to the optical engine 20, but is dissipated by the radiator 44 in the water-cooling device 40, thus effectively reducing vibration in the optical engine 20.

[0034] Generally, the radiator 44, through its structure of flat copper tubes and corrugated heat dissipation fins, conducts heat from the liquid medium flowing through it to the air. This process achieves "liquid-gas" heat exchange, lowering the temperature of the liquid medium so that it is at a lower temperature when it subsequently reaches the heat-conducting plate 41, forming a circulating heat dissipation. In one embodiment, the heat-conducting plate 41 is connected to the pump body 43, the pump body 43 is connected to the radiator 44, and the radiator 44 is connected to the heat-conducting plate 41 via different pipes 42. Both the heat-conducting plate 41 and the radiator 44 have water flow channels that communicate with the pipes 42. The heat-conducting plate 41, pipes 42, pump body 43, and radiator 44 are connected to form a closed loop to achieve the circulation of the liquid medium. The pump body 43 provides power for the liquid medium entering the loop. The liquid medium can absorb a large amount of heat from the higher-temperature heat-conducting plate 41 and flow to the lower-temperature radiator 44 to transfer heat to the surface of the radiator 44, specifically from the flat copper tubes to the numerous corrugated heat dissipation fins. As airflow passes through the radiator 44 inside the housing 10, heat from the surface of the radiator 44 is blown out of the housing 10. The number of heat-conducting plates 41 is not limited to one; the number of heat-conducting plates 41 and the area connected to the optical engine 20 can be set according to actual needs. The pipe 42 can be a rigid pipe or a flexible rubber pipe.

[0035] In some other embodiments, the water cooling device 40 may not have a separate tubular pipe 42. Instead, the heat-conducting plate 41 and the radiator 44 are integrated into a housing. A water flow channel is formed in the housing to connect the heat-conducting plate 41 and the radiator 44. At the same time, a pump is installed in the water flow channel to drive the liquid flow. In this case, there is no need to install a separate pump body 43.

[0036] The acoustic cavity 30 and the radiator 44 can be directly or indirectly fixedly connected. In this embodiment, the projection device also includes a rigid support 50. The acoustic cavity 30 and the radiator 44 are respectively fixed to the rigid support 50 so that the acoustic cavity 30 and the radiator 44 are indirectly fixedly connected. By fixing the acoustic cavity 30 and the radiator 44 to the same rigid structure, the vibration of the acoustic cavity 30 can be transmitted to the radiator 44 more quickly. The rigid support 50 can be made of sheet metal or other thin metal sheets. Alternatively, the acoustic cavity 30 can also be directly fixed to the periphery of the radiator 44 by fasteners.

[0037] Combination Figure 4 The projection device also includes a bracket 60, with the optical engine 20 fixed to the bracket 60. The bottom end of the bracket 60 is fixedly connected to the top end of the rigid support member 50, and both the optical engine 20 and the bracket 60 are located above the rigid support member 50. Notably, the support points of the optical engine 20 and the sound cavity 30 are not entirely fixed to the same component, which reduces vibration transmission. In this embodiment, the upper end of the sound cavity 30 is fixed to the bracket 60, and the lower end is fixed to the rigid support member 50. A speaker is provided in the sound cavity 30, with the speaker's sound output direction away from the optical engine 20.

[0038] Combination Figure 5 and Figure 6 The rigid support member 50 includes a base plate 51, a portion of which protrudes upward to form a first mounting plate 52. The first mounting plate 52 is perpendicular to the base plate 51. The lower end of the sound cavity 30 is fixed to the first mounting plate 52, and the radiator 44 is fixed to the base plate 51, so that the vibration of the sound cavity 30 can be quickly transmitted to the radiator 44 through the first mounting plate 52 and the base plate 51. Specifically, the base plate 51 is provided with multiple fixing holes 511, and multiple fasteners pass through the multiple fixing holes 511 to fix the radiator 44 to the base plate 51. The base plate 51 is also provided with an air outlet 512, and the radiator 44 is fixed to the corresponding air outlet 512 so that the heat of the radiator 44 can be discharged more quickly through the air outlet.

[0039] Furthermore, the base plate 51 protrudes upward to form a second mounting plate 53. The second mounting plate 53 is perpendicular to the base plate 51, parallel to the first mounting plate 52, and located above the base plate 51. The top of the second mounting plate 53 is higher than the first mounting plate 52. The bottom end of the bracket 60 is fixed to the top of the second mounting plate 53. The distance between the first mounting plate 52 and the radiator 44 is less than the distance between the second mounting plate 53 and the radiator 44. The first mounting plate 52 is located between the second mounting plate 53 and the radiator 44, thereby enabling the vibration of the sound cavity 30 to be transmitted to the radiator 44 more quickly.

[0040] In one embodiment, there are four second mounting plates 53 on the base plate 51, located at the four corners of the base plate 51. The bracket 60 and the four second mounting plates 53 are fixedly connected by fasteners. Further, the optical engine 20 is suspended from the bracket 60. The first mounting plate 52 is located between the two second mounting plates 53 on the same side of the radiator 44 and the base plate 51. The main body of the acoustic cavity 30 is located between the first mounting plate 52 and the two second mounting plates 53, and the acoustic cavity 30 is simultaneously located between the two second mounting plates 53. The bracket 60, the base plate 51, and the second mounting plates 53 together form an assembly space, which is approximately cuboid in shape. The optical engine 20 and the acoustic cavity 30 are located within this assembly space.

[0041] The heat-conducting plate 41, pump body 43, and radiator 44 in the water-cooling device 40 are connected by a pipe 42 to achieve coolant circulation. The pump body 43 can be fixed to the bracket 60 with fasteners to prevent it from swaying. Furthermore, the water-cooling device 40 also includes a water tank 45, which is connected to the radiator 44 and the pipe 42. The water tank 45 is fixed to the radiator 44 and is used to inject liquid medium. It has a accommodating space to hold more liquid medium. By setting up the water tank 45, the volume of coolant at the radiator 44 can be increased, improving buffering capacity. For water-cooling devices 40 without independent pipes 42, the water tank 45 is connected to the radiator 44. The optomechanical system 20 includes a light source and a light modulator, such as a digital micromirror device (DMD) or a liquid crystal on silicon (LCOS). The light beam emitted by the light source is adjusted by optical elements such as lenses, diffusers, and mirrors before shining onto the light modulator, thereby forming a light beam carrying image information. Finally, it is magnified by the projection lens and projected onto the projection device. The heat-conducting plates 41 in the water-cooling device 40 are connected to the light source and / or the light modulator. Specifically, in one embodiment, the water-cooling device 40 includes multiple heat-conducting plates 41, which are connected one by one to the light modulator and each light source, so that the water-cooling device 40 can efficiently dissipate heat from the core heat-generating components in the optical engine 20. At the same time, since there are multiple fixed connections between the water-cooling device 40 and the optical engine 20 through the heat-conducting plates 41, it can improve the support for the optical engine 20 and prevent the optical engine 20 from shaking significantly. It also helps to more fully transmit the vibration of the optical engine 20 to the liquid medium in the pipes 42 and the cooling radiator 44 through the pipes 42.

[0042] refer to Figure 3 The projection device also includes a fan 70, which is fixed to the radiator 44 and arranged in a stacked configuration. The fan 70 can be an axial fan. Furthermore, the fan 70 is located between the radiator 44 and the optical engine 20, and is spaced apart from the optical engine 20, so that the vibration of the fan 70 is directly transmitted to the radiator 44 without directly affecting the optical engine 20. The exhaust side of the fan 70 faces the radiator 44 to blow air across the radiator 44 and remove heat from its surface. The fan 70 is spaced apart from the heat-conducting plate 41, the pipe 42, and the pump body 43 to prevent the vibration generated by the fan 70 from being directly transmitted to the optical engine 20 through the pipes. In this embodiment, there are two fans 70, arranged along the length of the radiator 44. The fans 70 are spaced apart from the heat-conducting plate 41, the pipe 42, and the pump body 43.

[0043] The water-cooling device 40 contains a large amount of coolant, especially in the radiator 44. The function of the radiator 44 is to dissipate the heat in the coolant into the air. The heat dissipation efficiency is improved by increasing the heat dissipation area and using a fan to accelerate airflow. In the preferred embodiment of this utility model, the sound cavity 30 is fixed directly or indirectly to the radiator 44 by a rigid support member 50, so that the vibration of the sound cavity 30, which is the largest vibration source, can be directly transmitted to the liquid medium in the radiator 44. The vibration energy is dissipated through the liquid medium, reducing the vibration of the entire projection device and improving the problem of screen shaking.

[0044] The background section of this utility model may include background information about the problems or circumstances surrounding the present utility model, rather than a description of prior art by others. Therefore, the content included in the background section is not an admission of prior art by the applicant.

[0045] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the protection scope of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations may be made herein without departing from the scope defined by the appended claims.

Claims

1. A projection device, characterized by The application relates to a water-cooled sound cavity, which comprises a shell, a light machine, a sound cavity and a water cooling device, the shell is provided with an air outlet, the water cooling device comprises heat-conducting plates and a cooling row in communication, the heat-conducting plates are connected to the light machine, the air outlet side of the cooling row faces the air outlet, the sound cavity is fixedly connected to the cooling row, and the sound cavity is arranged in a spaced mode with the light machine.

2. The projection device according to claim 1, characterized in that, The sound cavity and the cooling row are fixed on a rigid support.

3. The projection device according to claim 2, characterized in that, The light machine is fixed on a support, the support is fixedly connected to the rigid support, and the light machine and the support are arranged above the rigid support.

4. The projection apparatus according to claim 3, wherein, The rigid support comprises a bottom plate, the bottom plate is upwardly protruded to form a first mounting plate, the sound cavity is fixed on the first mounting plate, and the cooling row is fixed on the bottom plate.

5. The projection device according to claim 4, characterized in that, The bottom plate is further upwardly protruded to form a second mounting plate, the top end of the second mounting plate is higher than the first mounting plate, the bottom end of the support is fixed on the top end of the second mounting plate, and the distance between the first mounting plate and the cooling row is smaller than the distance between the second mounting plate and the cooling row.

6. The projection apparatus according to claim 3, wherein, The upper end of the sound cavity is fixed on the support, and the lower end is fixed on the rigid support.

7. The projection apparatus according to claim 3, wherein, The water cooling device further comprises a pump body and a plurality of pipe sections, the pipe sections are connected between any two of the heat-conducting plates, the pump body and the cooling row, the heat-conducting plates, the pump body and the cooling row are communicated through the pipe sections, and the pump body is fixed on the support.

8. The projection apparatus according to claim 1, wherein, The water cooling device further comprises a water tank, the water tank is communicated with the cooling row, and the water tank is fixed on the cooling row.

9. The projection apparatus according to claim 1, wherein, The light machine comprises a light source and a light modulator, and the heat-conducting plates are connected to the light source and / or the light modulator.

10. The projection apparatus according to claim 1, wherein, The water-cooled sound cavity further comprises a fan, the fan is fixed on the cooling row, and the fan is arranged between the cooling row and the light machine in a spaced mode.

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