Water cooling head fixing device of projector LED light source

Abstract

The utility model discloses a water-cooling head fixing device of a projector LED light source. The water-cooling head fixing device comprises a base, an LED light source, a water-cooling head, a plate spring pressing sheet and a connecting assembly. An avoiding surface is arranged on the base, and a mounting surface is concavely arranged from the avoiding surface; a light-transmitting window penetrating through the base is arranged on the mounting surface of the base; a positioning column is arranged on the mounting surface; the LED light source comprises a metal substrate and an LED luminous body, the LED luminous body is fixedly mounted on the light emitting surface of the metal substrate, and positioning holes corresponding to the positioning columns are formed in the metal substrate; the light-emitting surface of the metal substrate is attached to the mounting surface, the positioning column is inserted into the positioning hole, the light-transmitting window is opposite to the LED luminous body in position, and the back surface of the metal substrate protrudes out of the avoiding surface; the back face of the metal substrate is attached to the heated face of the water cooling head. The plate spring pressing piece is connected with the base through a connecting assembly and presses the water cooling head and the metal base plate. The LED light source and the water cooling head are reliably fixed, and the water cooling head has the advantages of being simple in structure, low in heat transfer resistance, stable in weather resistance and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of projectors, and in particular relates to a water cooling head fixing device for a LED light source of a projector. Background Art

[0002] Domestic projector LED light source (see Figure 6 As shown in the figure: 21' is the LED luminous body, 22' is the metal substrate, the LED luminous body 21' is usually welded on the metal substrate 22' by eutectic process or reflow process, which is common knowledge in the industry and will not be repeated) has shown an increasing development trend in recent years. When the power of the LED light source is ≥120 watts, the water cooling method (including necessary components such as water cooling head, water pump, water pipe, water cooling radiator, fan, etc.) for the heat dissipation of the LED light source has better technical adaptability and economy.

[0003] In terms of technical adaptability, the heat source (LED light source) and the heat expansion facility (water cooling row) are connected by a soft water pipe, which is different from the existing high-power heat pipe radiator (see Figure 6 As shown: 71' is the heated substrate, 72' is the heat pipe, there are 4 of them in the figure, 73' is the "Fin" for heat expansion), the structure stacking of the projector is more flexible; and the heat transfer capacity of the heat pipe, on the finished radiator, people cannot change its thermal resistance, but water cooling is completely different, by changing the speed of the water pump, the thermal resistance from the heat source to the heat expansion facility can be changed over a wide range.

[0004] In terms of economy, water pumps, water cooling radiators, water cooling heads, etc. are all very mature, ready-made standard parts, which also saves the cost of making molds for heat pipe radiators. Because they are standard parts rather than customized parts, their cost and quality have a better foundation; and the length and cost of the heat pipe are directly related. In comparison, the cost of increasing the length of the water pipe (such as rubber, silicone and other materials) can be completely ignored.

[0005] The water cooling head is a very mature component, and its main application industry is to transfer heat or cold to semiconductor refrigerators (Peltier elements). For example, the 40mm*40mm size (thickness is generally about 6-12mm) is the most common. This size is very compatible with the LED light source of domestic projectors, but these standardized water cooling heads cannot be directly fixed together with the LED light source. Therefore, how to simply and reliably fix the water cooling head and the LED light source, and make the extremely high heat flux density and extremely large Joule heat of the LED light source be effectively transferred to the water cooling head through extremely low thermal resistance, is a topic that technical personnel in this field need to seriously face. Utility Model Content

[0006] The object of the present utility model is to provide a fixing device for a water-cooled head of a projector LED light source according to the technical development trend of the industry and for the water-cooled application of LED light sources, realizing the reliable fixation of the LED light source and the water-cooled head, and having many advantages such as simple structure, reliable heat transfer, and stable weather resistance.

[0007] To achieve the above object, the present utility model provides a fixing device for a water-cooled head of a projector LED light source, comprising a base, an LED light source, a water-cooled head, a leaf spring pressing piece, and a connecting component; the base is provided with an avoidance surface, and an installation surface is recessed inward from the avoidance surface; the base is provided with a light-transmitting window penetrating the base on the installation surface; positioning posts are arranged on the installation surface, and the number of the positioning posts is ≥ 2.

[0008] The LED light source includes a metal substrate and an LED light-emitting body. The LED light-emitting body is fixedly installed on the light-emitting surface of the metal substrate. Positioning holes corresponding to the positioning posts are made on the metal substrate; the light-emitting surface of the metal substrate is attached to the installation surface, the positioning posts are inserted into the positioning holes, and the light-transmitting window and the LED light-emitting body are opposite in position, and the back surface of the metal substrate protrudes from the avoidance surface.

[0009] The back surface of the metal substrate is attached to the heat-receiving surface of the water-cooled head; the middle of the leaf spring pressing piece is in an arched structure. The leaf spring pressing piece is connected to the base through the connecting component, so that the arched structure of the leaf spring pressing piece presses the back surface of the water-cooled head, and the heat-receiving surface of the water-cooled head is closely attached to the back surface of the metal substrate.

[0010] Further, the connecting component includes a copper column and a screw, and both ends of the leaf spring pressing piece are connected to the base through the copper column and the screw.

[0011] Further, limiting piers are arranged at the edge of the avoidance surface, and the number of the limiting piers is ≥ 4. The limiting piers are used for limiting the water-cooled head.

[0012] Preferably, the base is formed by die-casting with a metal material. The water-cooled head is a standard part with a heat-receiving surface size of 40mm * 40mm.

[0013] Advantages of the present utility model: The present utility model realizes the positioning and fixing of the metal substrate and the base through the positioning posts and positioning holes, and realizes the reliable fixing of the leaf spring pressing piece, the water-cooling head, the metal substrate and the base through the leaf spring pressing piece and the connecting component, that is, realizes the reliable fixing of the LED light source and the water-cooling head. At the same time, the arched structure of the leaf spring pressing piece presses the back surface of the water-cooling head, and makes the heat receiving surface of the water-cooling head closely fit with the back surface of the metal substrate, so that the extremely high heat flux density and extremely large Joule heat of the LED light source can be effectively transferred to the water-cooling head through an extremely low thermal resistance. The device of the present utility model has many advantages such as simple structure, reliable heat transfer and stable weather resistance. Description of the Drawings

[0014] 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 for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is an exploded view of an embodiment of the present utility model;

[0016] Figure 2 It is a sectional view of an embodiment of the present utility model;

[0017] Figure 3 It is a view showing the base of the present utility model;

[0018] Figure 4 It is an assembly schematic diagram of an embodiment of the present utility model;

[0019] Figure 5 For Figure 4 A view showing from another angle;

[0020] Figure 6 It is an existing heat pipe radiator.

[0021] The above-mentioned reference numerals:

[0022] 1. Base; 2. LED light source; 22. Metal substrate; 21. LED light-emitting body; 3. Water-cooling head; 4. Copper column; 5. Leaf spring pressing piece; 6. Screw; 11. Mounting surface; 12. Avoidance surface; 13. Translucent window; 14. Positioning post; 15. Limiting pier. Detailed Embodiments

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be described in detail below with reference to the drawings. The description in this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present utility model.

[0024] It should be noted that like reference numerals represent like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] It should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is customarily placed during use. It is 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0026] In addition, terms such as "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0027] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] Embodiment:

[0029] See Figures 1 - 5 As shown, a water-cooled head fixing device for a projector LED light source provided in this embodiment includes a base 1, an LED light source 2, a water-cooled head 3, a leaf spring pressing piece 5, and a connection assembly; an avoidance surface 12 is provided on the base 1, and an installation surface 11 is recessed inward from the avoidance surface 12; a light-transmitting window 13 penetrating the base 1 is provided on the installation surface 11 of the base 1; positioning columns 14 are provided on the installation surface 11, and the number of the positioning columns 14 is ≥ 2. The specific number of the positioning columns 14 is not limited here and is determined according to actual situations.

[0030] The LED light source 2 includes a metal substrate 22 and an LED light-emitting body 21. The LED light-emitting body 21 is fixedly installed on the light-emitting surface of the metal substrate 22. Positioning holes corresponding to the positioning posts 14 are made on the metal substrate 22. The light-emitting surface of the metal substrate 22 is attached to the installation surface 11. The positioning posts 14 are inserted into the positioning holes, and the light-transmitting window 13 and the LED light-emitting body 21 are relatively positioned. The back surface of the metal substrate 22 protrudes from the avoidance surface 12.

[0031] The back surface of the metal substrate 22 is attached to the heat-receiving surface of the water-cooling head 3. The middle of the leaf spring pressing piece 5 is in an arched structure. The leaf spring pressing piece 5 is connected to the base 1 through the connecting component, so that the arched structure of the leaf spring pressing piece 5 presses the back surface of the water-cooling head 3, and the heat-receiving surface of the water-cooling head 3 is closely attached to the back surface of the metal substrate 22.

[0032] In this embodiment, the positioning and fixing of the metal substrate 22 and the base 1 are realized through the positioning posts 14 and the positioning holes, that is, the positioning and fixing of the LED light source 2 and the base 1 are realized. And the reliable fixing of the leaf spring pressing piece 5, the water-cooling head 3, the metal substrate 22 and the base 1 is realized through the leaf spring pressing piece 5 and the connecting component, that is, the reliable fixing of the LED light source 2 and the water-cooling head 3 is realized. At the same time, the arched structure of the leaf spring pressing piece 5 presses the back surface of the water-cooling head 3, and the heat-receiving surface of the water-cooling head 3 is closely attached to the back surface of the metal substrate 22. Thus, the extremely high heat flux density and the extremely large joule heat of the LED light source 2 can be effectively transferred to the water-cooling head 3 with extremely low thermal resistance. The device of this embodiment has many advantages such as simple structure, reliable heat transfer, and stable weather resistance.

[0033] Preferably in this embodiment, the connecting component includes a copper column 4 and a screw 6. Both ends of the leaf spring pressing piece 5 are connected to the base 1 through the copper column 4 and the screw 6. Specifically, threaded holes are provided on the base 1, and corresponding through holes are provided on the leaf spring pressing piece 5. One end of the copper column 4 is provided with an external thread (screw rod), and the other end is provided with a screw hole (internal thread). When the leaf spring pressing piece 5 is connected to the base 1 through the copper column 4 and the screw 6, the external thread at one end of the copper column 4 is connected to the threaded hole on the base 1, and the other end of the copper column 4 abuts against the leaf spring pressing piece 5. The screw 6 passes through the through hole on the leaf spring pressing piece 5 and is connected to the screw hole at the other end of the copper column 4.

[0034] Preferably in this embodiment, limit piers 15 are provided at the edge of the avoidance surface 12. The number of the limit piers 15 is ≥4. The limit piers 15 are used for limiting the water-cooling head 3 and restricting the position of the water-cooling head 3 in four directions. See Figure 3 As shown, limit piers 15 are provided at the four corners at the edge of the avoidance surface 12, and at the same time, limit piers 15 are also provided in the middle of the edge of the avoidance surface 12. The specific number of the limit piers 15 is not limited here and is determined according to the actual situation.

[0035] Preferably in this embodiment, the base 1 is die-cast from a metal material such as ADC12. The water block 3 is a standard part with a heated surface size of 40mm * 40mm.

[0036] In this embodiment, a thermal interface material is filled between the heated surface of the water block 3 and the back surface of the metal substrate 22. This is common knowledge in the industry and will not be elaborated further. The heat transfer efficiency between the metal substrate 22 and the water block 3 is effectively improved through the thermal interface material.

[0037] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0038] In this article, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above examples is only used to help understand the method and its core idea of the present utility model. The above is only the preferred implementation manner of the present utility model. It should be pointed out that due to the limited nature of digital expression and the objectively infinite specific structures, for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the utility model to other occasions without improvement, should all be regarded as the protection scope of the present utility model.

Claims

1. A fixing device for a water-cooling head of a projector LED light source, characterized in that, It includes a base (1), an LED light source (2), a water-cooling head (3), a leaf spring pressing piece (5) and a connecting component; the base (1) is provided with an avoidance surface (12), and an installation surface (11) is recessed inward from the avoidance surface (12); the base (1) is provided with a light-transmitting window (13) penetrating the base (1) on the installation surface (11); positioning columns (14) are arranged on the installation surface (11), and the number of the positioning columns (14) is ≥ 2. The LED light source (2) includes a metal substrate (22) and an LED light-emitting body (21), the LED light-emitting body (21) is fixedly installed on the light-emitting surface of the metal substrate (22), and positioning holes corresponding to the positioning columns (14) are made on the metal substrate (22); the light-emitting surface of the metal substrate (22) is attached to the installation surface (11), the positioning columns (14) are inserted into the positioning holes, and the positions of the light-transmitting window (13) and the LED light-emitting body (21) are opposite, and the back surface of the metal substrate (22) protrudes from the avoidance surface (12). The back surface of the metal substrate (22) is attached to the heat-receiving surface of the water-cooling head (3); the middle of the leaf spring pressing piece (5) is in an arched structure, and the leaf spring pressing piece (5) is connected to the base (1) through the connecting component, so that the arched structure of the leaf spring pressing piece (5) presses the back surface of the water-cooling head (3), and the heat-receiving surface of the water-cooling head (3) is closely attached to the back surface of the metal substrate (22).

2. The water-cooling head fixing device for a projector LED light source according to claim 1, wherein The connecting component includes a copper column (4) and a screw (6), and both ends of the leaf spring pressing piece (5) are connected to the base (1) through the copper column (4) and the screw (6).

3. The water-cooled head fixing device for a projector LED light source according to claim 1, characterized in that, Limit piers (15) are arranged at the edge of the avoidance surface (12), the number of the limit piers (15) is ≥ 4, and the limit piers (15) are used for limiting the water-cooling head (3).

4. The water-cooled head fixing device for a projector LED light source according to claim 1, characterized in that The base (1) is die-cast from a metal material.

5. The water-cooling head fixing device for a projector LED light source according to claim 1, characterized in that, The water-cooling head (3) is a standard part with a heat-receiving surface size of 40mm * 40mm.

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