Projection device

Abstract

The utility model discloses projection equipment which comprises a heating device, a radiator, a heat pipe, a first fixing piece and a first fixing block, the first end of the heat pipe is connected with the heating device, the second end of the heat pipe is connected with the radiator, and the first fixing block is fixedly connected to the radiator. The first fixing piece is fixed to the side, away from the radiator, of the first fixing block, the first fixing piece and the first fixing block form a cantilever structure relative to the radiator, and the first fixing piece is pressed on the heat pipe. According to the projection equipment provided by the utility model, the assembly between the heating device and the radiator can be in soft contact, the assembly tolerance is fully absorbed, and the assembly precision is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of projection devices, in particular to a projection device. Background Art

[0002] Since the development of the projection industry, as the brightness of projectors has become higher and higher, the core device DMD (Digital Micro-mirror Device) is affected by extremely high-brightness light beams, resulting in an increasingly high temperature. For the conventional DMD heat dissipation, an aluminum extrusion solution is adopted, and the heat dissipation efficiency of the aluminum extrusion radiator is low. For example, in response to high-brightness projection, the volume of the aluminum extrusion radiator increases exponentially, which conflicts with the delicate requirements of the projection volume.

[0003] In addition, in some solutions, a solution of welding a copper plate, a heat pipe, fins, and a fixing piece is adopted. Although the heat dissipation performance is improved, the allowable assembly tolerance is small, which easily leads to the problem that one end is assembled obliquely when the two ends of the heat pipe are installed on the DMD and the heat dissipation fins, affecting the DMD heat dissipation. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides a projection device, which can make the assembly between the heat-generating device and the radiator in soft contact, fully absorb the assembly tolerance, and ensure the assembly accuracy.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] The utility model discloses a projection device, which includes a heat-generating device, a radiator, a heat pipe, a first fixing piece, and a first fixing block. The first end of the heat pipe is connected to the heat-generating device, and the second end is connected to the radiator. The first fixing block is fixedly connected to the radiator. The first fixing piece is fixed on the side of the first fixing block away from the radiator, and the first fixing piece forms a cantilever structure relative to the radiator and the first fixing block, and the first fixing piece is pressed on the heat pipe.

[0007] Preferably, the first fixing piece includes a first cantilever and a second cantilever. The second cantilever is connected between the first cantilever and the first fixing block. The first cantilever and the second cantilever are spaced from the radiator together. The first cantilever is spaced from the first fixing block. The heat pipe passes through between the first cantilever and the first fixing block and reaches between the first fixing piece and the radiator, and the first cantilever is pressed on the heat pipe.

[0008] Preferably, the first fixing piece includes two second cantilevers that are parallel and spaced apart from each other. The two second cantilevers are respectively connected to opposite ends of the first cantilever, and one ends of the two second cantilevers away from the first cantilever are both fixedly connected to the first fixing block.

[0009] Preferably, the heat pipe includes at least one bending portion, and the first cantilever is pressed at a position of one of the bending portions of the heat pipe.

[0010] Preferably, the first fixing block is in a U-shaped structure. One ends of the two second cantilevers away from the first cantilever are respectively fixedly connected to two parallel sides of the first fixing block, and the opening direction of the U-shaped structure formed by the first cantilever and the two second cantilevers is opposite to the opening direction of the U-shaped structure of the first fixing block; the heat pipe includes at least one bending portion, and one of the bending portions of the heat pipe is located on a side of the first fixing block away from the radiator.

[0011] Preferably, the projection device further includes a second fixing piece and a second fixing block. The second fixing block is fixedly connected to the radiator. The second fixing piece is fixedly connected to the second fixing block and is spaced apart from the radiator. The second fixing piece presses the second end of the heat pipe between the second fixing piece and the radiator.

[0012] Preferably, the second fixing block is in a U-shaped structure. Two ends of the second fixing piece are respectively fixedly connected to two parallel sides of the second fixing block, and the second end of the heat pipe extends into the area enclosed by the U-shaped structure of the second fixing block.

[0013] Preferably, the radiator includes heat dissipation fins and a heat conductive gasket. The heat conductive gasket is pressed between the second end of the heat pipe and the heat dissipation fins.

[0014] Preferably, the contact position of the heat pipe with the radiator is in a strip shape.

[0015] Preferably, the first fixing piece is in a thin sheet-like structure.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: For the projection device proposed by the present utility model, the heat generating device and the radiator are connected by a heat pipe, and the heat of the heat generating device is conducted to the radiator for faster heat dissipation. The first fixing piece pressed on the heat pipe forms a cantilever structure relative to the radiator and the second fixing block, so that the first fixing piece has a certain deformation ability, and further enables the heat pipe to have a certain displacement adjustment space even when being pressed, so that the assembly between the heat generating device and the radiator is in soft contact, fully absorbing the assembly tolerance and ensuring the assembly accuracy.

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

[0018] (1) The heat pipe includes at least one bent portion, so that the heat pipe itself can withstand slight deformation, absorb part of the assembly tolerance, and one of the bent portions is pressed under the first cantilever of the first fixing piece, further increasing the displacement adjustment space between the heat pipe and the first fixing piece, thereby further improving the assembly accuracy.

[0019] (2) The radiator includes heat dissipation fins and a heat conducting gasket. The heat conducting gasket can generally be made of an elastic material, which can be compressed itself and can also absorb part of the assembly tolerance, thereby further improving the assembly accuracy.

[0020] (3) The first fixing piece adopts a thin sheet structure, has elasticity itself, and can also absorb part of the assembly tolerance, thereby further improving the assembly accuracy.

[0021] (4) The second end of the heat pipe is fixedly connected through a second fixing piece and a second fixing block, which can improve the installation stability of the heat pipe. Further, the second fixing block has a U-shaped structure, and the second end of the heat pipe extends into the area enclosed by the U-shaped structure, so that the second fixing block can play a positioning role on the heat pipe and improve the installation efficiency of the heat pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the internal structure of a projection device disclosed in a preferred embodiment of the present utility model;

[0023] Figure 2 is Figure 1 an enlarged schematic diagram of part A in

[0024] Figure 3 is Figure 1 an enlarged schematic diagram of part B in

[0025] Figure 4 is Figure 1 an exploded schematic diagram of the interior of the projection device in

[0026] DESCRIPTION OF THE REFERENCE NUMERALS:

[0027] 10, heating device; 11, heat dissipation bottom plate; 12, spring screw; 20, radiator; 21, heat dissipation fins; 22, heat conducting gasket; 30, heat pipe; 40, first fixing piece; 41, first cantilever; 42, second cantilever; 50, first fixing block; 60, second fixing piece; 70, second fixing block; 80, heat dissipation fan. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following is a detailed description of the embodiments of the present utility model. It should be emphasized that the following description is merely exemplary and not intended to limit the scope of the present utility model and its applications.

[0029] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the connection can be for fixing or for circuit / signal communication.

[0030] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present invention 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 therefore should not be construed as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0032] As Figure 1 and Figure 2 shown, a preferred embodiment of the present invention discloses a projection device, including a heating device 10, a radiator 20, a heat pipe 30, a first fixing piece 40, and a first fixing block 50. The first end of the heat pipe 30 is connected to the heating device 10, and the second end is connected to the radiator 20. The first fixing block 50 is fixedly connected to the radiator 20. The first fixing piece 40 is fixed on the side of the first fixing block 50 away from the radiator 20, and the first fixing piece 40 forms a cantilever structure relative to the radiator 20 and the first fixing block 50, and the first fixing piece 40 is pressed on the heat pipe 30. It should be noted that the first end and the second end of the heat pipe 30 in this application are not limited to the end positions, but also include a section of structure extending from the end of the heat pipe 30 towards the center.

[0033] The first fixing piece 40 includes a first cantilever 41 and a second cantilever 42. The second cantilever 42 is connected between the first cantilever 41 and the first fixing block 50. The first cantilever 41 and the second cantilever 42 are jointly arranged at an interval relative to the radiator 20. The first cantilever 41 is spaced from the first fixing block 50. The heat pipe 30 passes through between the first cantilever 41 and the first fixing block 50 and reaches between the first fixing piece 40 and the radiator 20. The first cantilever 41 is pressed against the heat pipe 30. Further, the first fixing piece 40 includes two second cantilevers 42 that are parallel and spaced from each other. The two second cantilevers 42 are respectively connected to opposite ends of the first cantilever 41. At this time, the first cantilever 41 and the two second cantilevers 42 form a U-shaped structure. The ends of the two second cantilevers 42 away from the first cantilever 41 are both fixedly connected to the first fixing block 50. The first cantilever 41 and the second cantilever 42 are integrally formed. The second cantilever 42 is fixedly locked to the top of the first fixing block 50 through fasteners such as screws.

[0034] Combined Figure 4 , wherein, the first fixing block 50 is a U-shaped structure. The ends of the two second cantilevers 42 away from the first cantilever 41 are respectively fixedly connected to two parallel sides on the first fixing block 50, such as fixedly connected through the above-mentioned fasteners. And the opening direction of the U-shaped structure formed by the first cantilever 41 and the two second cantilevers 42 is arranged opposite to the opening direction of the U-shaped structure of the first fixing block 50 to provide a larger space for the heat pipe 30 to pass through, which is beneficial to avoiding the second cantilever 42 being too long and unable to make the first cantilever 41 stably press the heat pipe 30. The heat pipe 30 includes at least one bending portion 31, and one of the bending portions 31 is located on the side of the first fixing block 50 away from the radiator 20 and is simultaneously pressed by the first cantilever 41. By arranging a plurality of bending portions 31, the heat pipe 30 is integrally in a bent long strip shape and can bear slight deformation itself, and can absorb part of the assembly tolerance. In a specific example, the heat pipe 30 can be made of, for example, a copper pipe or other common materials with excellent thermal conductivity.

[0035] Combined Figure 3 , in a further embodiment, the projection device further includes a second fixing piece 60 and a second fixing block 70. The second fixing block 70 is fixedly connected to the radiator 20. The second fixing piece 60 is fixedly connected to the second fixing block 70 and the second fixing piece 60 is arranged at an interval relative to the radiator 20. The second fixing piece 60 presses the second end of the heat pipe 30 between the second fixing piece 60 and the radiator 20. Further, the second fixing block 70 is a U-shaped structure. The two ends of the second fixing piece 60 are respectively fixedly connected to two parallel sides on the second fixing block 70. The second end of the heat pipe 30 extends into the area enclosed by the U-shaped structure of the second fixing block 70.

[0036] The heat sink 20 includes heat dissipation fins 21 and a heat conductive gasket 22. The heat conductive gasket 22 is located between the first fixing block 50 and the second fixing block 70, and is pressed between the second end of the heat pipe 30 and the heat dissipation fins 21. The heat conductive gasket 22 has elastic characteristics and can deform after being pressed, so that it can also provide a certain rotation space for the heat pipe 30 during installation, which helps to absorb the assembly tolerance when the heat pipe 30 is fixed on the optical engine. Among them, the heat conductive gasket 22 is strip-shaped, the contact position between the heat conductive gasket 22 and the heat dissipation fins 21 is strip-shaped, and the contact position between the heat pipe 30 and the heat conductive gasket 22 is strip-shaped. First, the heat pipe 30 contacts the heat dissipation fins 21 through the heat conductive gasket 22. The heat conductive gasket 22 conducts the heat on the heat pipe 30 to the heat dissipation fins 21. The heat conductive gasket 22 itself can be compressed and can absorb part of the assembly tolerance. Further, the first fixing block 50 and the second fixing block 70 are respectively fixedly connected to the heat dissipation fins 21. Specifically, combined with Figure 4 , the first fixing block 50 and the second fixing block 70 are respectively welded to the heat dissipation fins 21, and threaded holes are provided on the upper surfaces of the first fixing block 50 and the second fixing block 70. Screws are used to lock the first fixing piece 40 and the second fixing piece 60 to the first fixing block 50 and the second fixing block 70 welded on the heat dissipation fins 21 respectively, so that the first fixing piece 40 and the second fixing piece 60 respectively abut against the heat pipe 30. The first fixing piece 40 and the second fixing piece 60 are respectively in a thin sheet structure and have certain elasticity themselves, and can also absorb part of the assembly tolerance. Specifically, the first fixing piece 40 and the second fixing piece 60 can be metal thin sheets of 1 mm to 2 mm, such as thin iron sheets. After the optical engine and the heat sink 20 are fixed, the first end of the heat pipe 30 can be installed on the heat generating device 10, and the second end can be pressed onto the heat conductive gasket 22. Subsequently, the first fixing piece 40 and the second fixing piece 60 are respectively installed on the first fixing block 50 and the second fixing block 70 to press the second end of the heat pipe 30, so that the second end of the heat pipe 30 is restricted between the first fixing block 50 and the second fixing block 70. In some other embodiments, the first fixing piece 40 and the second fixing piece 60 can also be respectively welded to the heat pipe 30.

[0037] In a projection device, generally, the DMD has relatively high requirements for the installation accuracy of the heat dissipation base plate, and the tolerable tolerance is small. Therefore, in one example, the heat generating device 10 is a DMD (Digital Micromirror Device), the first end of the heat pipe 30 is welded and connected to the heat dissipation base plate 11, and the heat dissipation base plate 11 can be connected to the back of the heat generating device 10 through a spring screw 12; so that the heat of the DMD sequentially passes through the radiator base plate 11, the heat pipe 30, and the heat conducting gasket 22, enabling the heat of the DMD and the heat of the optical engine to be collected on the heat dissipation fins 21 of the optical engine, and then blown out by the heat dissipation fan 80, so as to be able to reduce the temperature of the optical engine and the DMD simultaneously. In other examples, the heat generating device 10 can also be other high-heat-generating devices such as the light source of the optical engine.

[0038] In the projection device of the present invention, a three-layer scheme is utilized in the assembly of the heat generating device 10 to absorb tolerances layer by layer, maximizing the guarantee of assembly accuracy, and is particularly suitable for heat generating devices with relatively high requirements for installation accuracy; among them, the three structures for absorbing the assembly tolerance of the heat pipe 30 are: the bending structure of the heat pipe 30, the thin cantilever structure of the first fixing piece 40, and the structure of the heat conducting gasket 22.

[0039] In the projection device proposed in the preferred embodiment of the present utility model, the heat generating device 10 and the heat dissipation fins 21 are connected through the heat pipe 30 to conduct the heat of the heat generating device 10 to the heat dissipation fins 21 for faster heat dissipation; at the same time, by arranging the first fixing piece 40 with a cantilever structure of a certain length on the heat dissipation fins 21, the heat pipe 30 is pressed by pressing the first fixing piece, and the cantilever structure of the first fixing piece 40 is made to have a certain deformation energy, so that the heat pipe 30 can have a certain displacement adjustment space even when being pressed, thereby enabling the assembly between the heat generating device 10 and the heat dissipation fins 22 to be in soft contact, fully absorbing the assembly tolerance, and ensuring the assembly accuracy; furthermore, the assembly inclination of the heat pipe 30 on the side of the heat generating device 10 can be reduced, effectively reducing the inclination problem of the heat pipe 30 on the side of the heat generating device 10 caused by the assembly tolerance.

[0040] The background part of the present utility model may include background information about the problems or environment of the present utility model, rather than the description of the prior art by others. Therefore, the content included in the background art section is not an admission by the applicant of the prior art.

[0041] The above content is a further detailed description of the present utility model in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the art to which the present utility model pertains, without departing from the concept of the present utility model, several alternatives or modifications can be made to these described embodiments, and these alternative or modified forms should all be regarded as belonging to the protection scope of the present utility model. In the description of this specification, the descriptions referring to terms such as "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present utility model and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope defined by the appended claims.

Claims

1. A projection device, characterized in that, It includes a heating device, a radiator, a heat pipe, a first fixing piece, and a first fixing block. The first end of the heat pipe is connected to the heating device, and the second end is connected to the radiator. The first fixing block is fixedly connected to the radiator. The first fixing piece is fixed to the side of the first fixing block away from the radiator, and the first fixing piece forms a cantilever structure relative to the radiator and the first fixing block. The first fixing piece is pressed against the heat pipe.

2. The projection device according to claim 1, characterized in that, The first fixing piece includes a first cantilever and a second cantilever. The second cantilever is connected between the first cantilever and the first fixing block. The first cantilever and the second cantilever are jointly spaced from the radiator. The first cantilever is spaced from the first fixing block. The heat pipe passes through between the first cantilever and the first fixing block and reaches between the first fixing piece and the radiator. The first cantilever is pressed against the heat pipe.

3. The projection device according to claim 2, characterized in that, The first fixing piece includes two second cantilevers that are parallel and spaced from each other. The two second cantilevers are respectively connected to opposite ends of the first cantilever. The ends of the two second cantilevers away from the first cantilever are both fixedly connected to the first fixing block.

4. The projection device according to claim 2, wherein The heat pipe includes at least one bending portion, and the first cantilever is pressed against a position of one of the bending portions of the heat pipe.

5. The projection device according to claim 3, characterized in that, The first fixing block is in a U-shaped structure. The ends of the two second cantilevers away from the first cantilever are respectively fixedly connected to two parallel sides on the first fixing block, and the opening direction of the U-shaped structure formed by the first cantilever and the two second cantilevers is opposite to the opening direction of the U-shaped structure of the first fixing block; the heat pipe includes at least one bending portion, and one of the bending portions of the heat pipe is located on the side of the first fixing block away from the radiator.

6. The projection device according to claim 1, wherein It further includes a second fixing piece and a second fixing block. The second fixing block is fixedly connected to the radiator. The second fixing piece is fixedly connected to the second fixing block and is spaced from the radiator. The second fixing piece presses the second end of the heat pipe between the second fixing piece and the radiator.

7. The projection device according to claim 6, wherein The second fixing block is in a U-shaped structure. The two ends of the second fixing piece are respectively fixedly connected to two parallel sides on the second fixing block. The second end of the heat pipe extends into the area enclosed by the U-shaped structure of the second fixing block.

8. The projection device according to claim 1, wherein, The radiator includes heat dissipation fins and a heat conduction gasket. The heat conduction gasket is pressed between the second end of the heat pipe and the heat dissipation fins.

9. The projection device according to claim 1, characterized in that, The contact position of the heat pipe with the radiator is in a strip shape.

10. The projection device according to claim 1, characterized in that, The first fixing piece is in a thin sheet structure.

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