LED display screen box frame and die-casting die

Abstract

The utility model discloses an LED display screen box body frame and die-casting mould, the LED display screen box body frame comprises a shell and a mounting plate, the shell comprises a containing cavity, the mounting plate is used for being contacted with a power supply located in the containing cavity, the shell is formed by liquid metal die-casting, one part of the shell is located on one side of the mounting plate and is contacted with the mounting plate, and the other part of the shell is located on the other side of the mounting plate. And one part of the shell surrounds the peripheral side of the mounting plate and is in contact with the mounting plate. The shell is enclosed on the outer side of the mounting plate in a die composite forming mode, alloy made of different materials is integrally formed in a composite mode, the problem of sand holes caused by the fact that the wall thickness of a power source mounting portion of an LED display screen box frame is too large is solved, the surface of the mounting plate is smooth and free of sand holes, the contact area with a power source is increased, and the service life of the LED display screen box frame is prolonged. Therefore, the heat dissipation area is increased, and the heat dissipation effect is improved; meanwhile, the wall thickness of the die-casting metal forming part is uniform, the problem of sink marks on the appearance surface is solved, and the attractiveness is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of LED display screens, in particular to an LED display screen box frame and a die-casting mold. Background Art

[0002] The installation part of the power box of the LED display cabinet frame needs to contact the power supply for heat dissipation. The common method is to directly increase the thickness of the installation position. Due to the characteristics of the die-casting process, this also leads to the problem of internal sand holes in the cabinet during the die-casting process due to the excessive wall thickness. The sand holes are exposed on the surface of the installation part after machining by CNC machine tools, affecting the appearance. At the same time, large-area sand holes will also reduce the contact area between the installation part and the power supply, thereby reducing the heat dissipation efficiency of the power supply and affecting the display effect of the LED display. Utility Model Content

[0003] In order to overcome at least one of the above-mentioned disadvantages, the present invention provides a LED display box frame and a die-casting mold. The purpose of the present invention can be achieved by adopting the following technical solutions:

[0004] According to a first aspect of the utility model, a box frame of an LED display screen is provided, comprising a shell and a mounting plate, wherein the mounting plate is used to contact a power source, the shell is a die-casting, and the mounting plate is a profile member, a portion of the shell is located on one side of the mounting plate and contacts the mounting plate, and a portion of the shell is enclosed on the outer peripheral side of the mounting plate and contacts the mounting plate.

[0005] In one possible implementation, the mounting plate includes a plate body and a positioning column, and the positioning column is arranged on the plate body and protrudes from the plate body.

[0006] In one possible implementation manner, the mounting plate further comprises a glue pulling position which is arranged at the edge of the plate body and is recessed inwardly, and a plurality of the glue pulling positions are all located in the same horizontal plane.

[0007] In one possible implementation manner, the glue pulling position is arranged along the outer edge of the plate body, and the distance between two adjacent glue pulling positions arranged in the same direction is the same.

[0008] In one embodiment, the housing includes a mounting groove, which is formed by die-casting a liquid casting material around the mounting plate, and the shape of the mounting groove is adapted to the mounting plate so that the outer peripheral wall of the mounting plate contacts the inner peripheral wall of the mounting groove.

[0009] In one possible implementation, the mounting groove further includes a protrusion, which is located in the glue pulling position and extends toward the mounting plate.

[0010] In one possible implementation manner, the surface of the mounting plate for contacting the power supply is flat and smooth and / or its shape is adapted to the power supply, the number of the positioning posts is at least four, and they are symmetrically arranged in the edge area of ​​the plate body, and the distance between the end faces of several of the positioning posts and the plate body is the same.

[0011] In one possible implementation manner, a protruding limiting portion is provided on a surface of the plate body facing the shell, and the limiting portion is located at a periphery of the plate body.

[0012] In one possible implementation manner, the housing is formed by die-casting of a cast aluminum alloy and / or a magnesium alloy, and the mounting plate is processed from an aluminum alloy.

[0013] The second aspect of the utility model provides a die-casting mold, which is used for die-casting the LED display box frame described in any one of the first aspects, the mounting plate includes a positioning column, the die-casting mold includes a positioning hole, the positioning holes are arranged in a one-to-one correspondence with the positioning columns, the positioning holes are used to accommodate the positioning columns and form a limit with the mounting plate.

[0014] Beneficial technical effects of the utility model: According to the content of the present disclosure, the LED display box frame includes an outer shell and a mounting plate. The outer shell is formed by liquid metal die-casting, and the outer shell is enclosed on the outside of the mounting plate by die-casting through mold composite molding. Alloys of different materials can be composited into one piece, which solves the problem of sand holes caused by excessive wall thickness at the power supply installation part of the LED display box frame. The surface of the mounting plate is smooth and free of sand holes, which increases the contact area with the power supply, thereby increasing the heat dissipation area and improving the heat dissipation effect. At the same time, the wall thickness of the die-cast metal molding part is uniform, which solves the problem of shrinkage marks on the appearance surface and improves the aesthetics. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In the accompanying drawings, the following are given by way of example and not limitation:

[0016] Figure 1 Shows a stereoscopic view of the LED display screen cabinet frame structure;

[0017] Figure 2 Shows a top view of the LED display box frame structure;

[0018] Figure 3 Shows Figure 3 A schematic diagram of the enlarged structure of part A;

[0019] Figure 4 A cross-sectional view of the main structure of the housing and the mounting plate is shown;

[0020] Figure 5 A cross-sectional view of the main structure of the LED display cabinet frame is shown;

[0021] Figure 6 Shows Figure 5 A schematic diagram of the enlarged structure of part B;

[0022] Figure 7 Shows Figure 6 A schematic diagram of the enlarged structure of the C portion;

[0023] Figure 8 A top view of the mounting plate structure is shown;

[0024] Fig. 9 A left side structural cutaway view of the housing and mounting plate is shown.

[0025] In the figure: 1, housing; 2, mounting plate; 11, mounting groove; 12, convex part; 21, plate body; 22, positioning column; 23, glue pulling position; 24, limit part. DETAILED DESCRIPTION

[0026] In the following detailed disclosure, these embodiments are fully described with reference to the drawings. In order to make the technical scheme of the utility model more clear and specific to those skilled in the art, the implementation methods described below are not limited to this. The utility model is further described in detail below in combination with the embodiments and drawings.

[0027] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0028] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0029] The first aspect of the utility model is as follows Figure 1-Figure 9As shown, an LED display box frame is provided, including a shell 1 and a mounting plate 2, the mounting plate 2 is used to contact with a power source, the shell 1 is a die-casting, the mounting plate 2 is a profile part, a part of the shell 1 is located on one side of the mounting plate 2 and contacts with the mounting plate 2, and a part of the shell 1 is enclosed on the outer peripheral side of the mounting plate 2 and contacts with the mounting plate 2.

[0030] The LED display box frame includes a shell 1 and a mounting plate 2. The shell 1 is formed by liquid metal die-casting. The shell 1 is enclosed on the outside of the mounting plate 2 by die-casting through a mold composite molding method. Alloys of different materials are composited into one piece, which solves the problem of sand holes caused by excessive wall thickness at the power supply installation part of the LED display box frame. The surface of the mounting plate 2 is smooth and free of sand holes, which increases the contact area with the power supply, thereby increasing the heat dissipation area and improving the heat dissipation effect. At the same time, the wall thickness of the die-cast metal molding part is uniform, which solves the problem of shrinkage marks on the appearance surface and improves the aesthetics.

[0031] like Figure 1 As shown, the housing 1 includes a receiving cavity for receiving components such as a power supply. Reinforcing ribs may be provided in the receiving cavity to increase the hardness and rigidity of the housing 1 for supporting the components in the receiving cavity.

[0032] In one possible implementation, Figure 7-Figure 9 As shown, the mounting plate 2 includes a plate body 21 and a positioning column 22 . The positioning column 22 is disposed on the plate body 21 and protrudes from the plate body 21 .

[0033] It can be understood that by providing a protruding positioning column 22 on the plate body 21 and placing the positioning column 22 on the positioning hole of the die-casting mold, the mounting plate 2 is fixed on the die-casting mold to prevent the mounting plate 2 from shifting during subsequent processing and improve the processing accuracy.

[0034] In one possible implementation, Figure 8 As shown, the mounting plate 2 also includes a glue pulling position 23 which is arranged at the edge of the plate body 21 and is recessed inward, and several glue pulling positions 23 are all located in the same horizontal plane; the glue pulling positions 23 are arranged along the outer edge of the plate body 21, and the distance between two adjacent glue pulling positions 23 arranged in the same direction is the same.

[0035] The mounting plate 2 is provided with a glue pulling position 23. Specifically, the glue pulling position 23 can be as follows: Figure 8The notch shown can reduce cracking caused by insufficient fusion of the bonding area, and improve the clamping force between the mounting plate 2 and the outer shell 1, so as to realize a battery box after the fusion of materials with different requirements. After final molding, the wall thickness of the outer shell 1 is uniform and has no shrinkage marks, and the surface of the mounting plate 2 can be normally polished, which solves the problem of sand holes on the contact surface with the power supply, increases the contact area between the power supply and the mounting plate 2, and also increases the contact area between the mounting plate 2 and the outer shell 1, thereby improving the heat transfer effect between the power supply, the mounting plate 2 and the outer shell 1, and improving the heat dissipation efficiency of the power supply.

[0036] In one possible implementation, Figure 3 As shown, the housing 1 includes a mounting groove 11, which is formed by die-casting a liquid casting material to surround a mounting plate 2, and the shape of the mounting groove 11 is adapted to the mounting plate 2 so that the outer peripheral wall of the mounting plate 2 contacts the inner peripheral wall of the mounting groove 11.

[0037] It can be understood that the mounting groove 11 is formed by injecting liquid casting material into the die-casting mold to surround the mounting plate 2, so that the shape of the mounting groove 11 is adapted to the mounting plate 2, and a circumferentially closed contact surface is formed between the plate body 21 and the casting material.

[0038] In one possible implementation, Figure 3 As shown, the mounting groove 11 further includes a protrusion 12 , which is located in the glue pulling position 23 and extends toward the mounting plate 2 .

[0039] It can be understood that the glue pulling position 23 of the mounting plate 2 is recessed inward to accommodate the protrusion 12, and the mounting groove 11 of the outer shell 1 after the casting material and the mounting plate 2 are contact-formed is formed with a protrusion 12 adapted to the groove, and the protrusion 12 is located in the glue pulling position 23, and the side wall of the protrusion 12 is in contact with the inner wall of the glue pulling position 23, which greatly increases the contact area between the outer wall of the mounting plate 2 and the inner wall of the mounting groove 11, that is, increases the contact area between the mounting plate 2 and the outer shell 1, and improves the stability and heat transfer effect of the two.

[0040] In one possible implementation, Figure 8 and Fig. 9 As shown, the number of the positioning posts 22 is at least four, and they are symmetrically arranged at the edge area of ​​the plate body 21 , and the distances between the end faces of the plurality of positioning posts 22 and the plate body 21 are the same.

[0041] It is understandable that the number of the positioning posts 22 is at least four and they are disposed at the edge areas of the plate body 21 . Several positioning posts 22 can be symmetrically disposed on the plate body 21 to keep the plate body 21 level.

[0042] The end faces of the plurality of positioning columns 22 are at the same distance from the plate body 21. The plurality of positioning columns 22 are used to provide multi-point support to the plate body 21, so that a horizontal gap is left between the plate body 21 and the die-casting mold for liquid metal to enter, so that a portion of the molded housing 1 is located between the mounting plate 2 and the die-casting mold.

[0043] The positioning column 22 is arranged along the normal direction of the plate body 21 itself. The positioning column 22 is used in conjunction with the positioning hole of the die-casting mold. A portion of the positioning column 22 is inserted into the positioning hole to form a limit in the horizontal direction of the mounting plate 2. During the process of injecting liquid metal into the die-casting mold, the liquid metal will not cause the mounting plate 2 to shift, thereby ensuring the stability of the mounting plate 2 and further improving the precision of the parts. Furthermore, the end of the positioning column 22 for inserting into the positioning hole can be set as a cone surface, which is more convenient for insertion into the positioning hole.

[0044] The side of the plate body 21 facing the die-casting mold is in contact with the liquid metal, and the outer wall of the positioning column 22 is in contact with the liquid metal, thereby increasing the contact area between the casting material and the plate body 21. The contact surface between the plate body 21 and the casting material includes a horizontal surface and a vertical surface closed along the circumferential direction, and the contact surface between the positioning column 22 and the casting material is a vertical surface closed along the circumferential direction. The contact surface between the plate body 21 and the casting material is not completely the same as the contact surface between the positioning column 22 and the casting material in the same direction, which can greatly improve the locking effect between the mounting plate 2 and the outer shell 1, and can achieve more reliable, rigid and durable fixation of the mounting plate 2 in the casting material, thereby improving the connection effect between the mounting plate 2 and the outer shell 1, and improving the stability and contact area of ​​the two.

[0045] Specifically, the mounting plate 2 is first placed on the positioning hole of the die-casting mold through the positioning column 22. Then when the liquid casting material is filled into the die-casting mold through the die-casting machine, the liquid casting material encounters the mounting plate 2 and quickly undergoes boundary fusion. The mounting plate 2 is processed with a top position. During the molding process, the fixed mold presses the mounting plate 2 through the top position to prevent it from falling off.

[0046] In one possible implementation manner, the surface of the side of the mounting plate 2 facing the power supply is flat and smooth, and / or the shape of the side of the mounting plate 2 facing the power supply is adapted to the power supply.

[0047] The surface of the mounting plate 2 facing the power supply can be flat and smooth, which is suitable for power supplies with relatively flat end surfaces, thereby increasing the contact area between the mounting plate 2 and the power supply.

[0048] The surface shape of the mounting plate 2 facing the power supply can be adapted to the power supply, and is suitable for power supplies with end faces of various shapes, and can increase the contact area between the mounting plate 2 and the power supply.

[0049] In one possible implementation, Figure 7As shown, a protruding limiting portion 24 is provided on the surface of the plate body 21 facing the housing 1 , and the limiting portion 24 is located at the periphery of the plate body 21 .

[0050] It is understandable that a limiting portion 24 is provided on the surface of the plate body 21 facing the housing 1 , and the limiting portion 24 protrudes from the end surface of the plate body 21 to increase the contact area with the housing 1 , avoid misalignment of the mounting plate 2 , and improve position stability.

[0051] In one possible implementation, the shape of the plate body 21 is polygonal, circular, or a combination of two or more.

[0052] It is understandable that the shape of the plate 21 can be set according to the shape of the power supply, and is not limited to polygonal or circular shapes, etc., and can also be other shapes such as ellipse.

[0053] When the shape of the plate body 21 is a triangle, the number of the positioning posts 22 may be three, which are respectively disposed at the three vertices of the plate body 21 .

[0054] When the plate body 21 is in a square shape, the number of the positioning posts 22 may be four, which are disposed at four vertices of the plate body 21 .

[0055] When the plate body 21 is in a hexagonal shape, the number of the positioning posts 22 may be six, which are disposed at six vertices of the plate body 21 .

[0056] When the plate body 21 is circular in shape, the number of the positioning posts 22 is at least three, and the angles between the multiple positioning posts 22 are the same.

[0057] like Figure 8 As shown, when the plate body 21 is a polygon, the vertex position of the plate body 21 can be provided with a chamfer or a rounded corner, which can reduce cracks in the housing 1.

[0058] During the die-casting process, the mounting plate 2 is used as an embedded part, and the casting material partially encapsulates the embedded part to form the housing 1 through die-casting. The casting material may be liquid metal.

[0059] Furthermore, the casting material may be an aluminum alloy or a magnesium alloy, that is, the housing 1 is formed by die-casting of a cast aluminum alloy / magnesium alloy, and the mounting plate 2 is formed by processing of an aluminum alloy.

[0060] It is understandable that aluminum alloy and magnesium alloy have better heat transfer effect, lower density and lighter weight, and can meet the requirements of different LED display cabinet frames.

[0061] Specifically, magnesium alloy has a lower density and lighter weight than aluminum alloy, and its strength is higher than that of aluminum alloy. Under good structural conditions, magnesium alloy allows the wall thickness of the casting to be less than 0.6mm, which is impossible for plastics to achieve at the same strength. The die-casting performance of aluminum alloy must be above 1.2-1.5mm to be comparable to that of magnesium alloy. Magnesium alloy is easier to die-cast and is suitable for mass die-casting production. The production speed is higher than that of aluminum alloy, and the wear of magnesium alloy mold is lower than that of aluminum alloy. Magnesium alloy has good electromagnetic wave blocking function, absorbs electromagnetic interference, and can provide excellent anti-electromagnetic protection for LED. Magnesium alloy also has good hysteresis and shock absorption performance, which can absorb vibration and noise. It can be used as the housing of the equipment LED display to reduce noise transmission, prevent impact and prevent dent damage. Magnesium alloy has good machinability, is easier to grind and polish, has a small specific heat capacity, and the alloy liquid cools quickly. Magnesium alloy has low affinity with the die-casting mold, is not easy to adhere to the mold, and is easy to demold. The aluminum alloy shell 1 after molding has a high appearance quality, good appearance and touch, which can improve the aesthetics of the shell 1.

[0062] Compared with magnesium alloy, aluminum alloy has higher corrosion resistance, higher corrosion resistance to chemical erosion, and is more suitable for contact with power supply. Aluminum alloy can form a hard, dense oxide film with good corrosion resistance in the atmosphere. The corrosion resistance of aluminum alloy can be further improved through surface treatment such as electrophoretic painting, anodizing, powder spraying, etc.

[0063] The utility model uses aluminum alloy with good corrosion resistance to prepare the mounting plate 2, the mounting plate 2 is used to contact with the power source, and uses aluminum alloy or magnesium alloy as a casting material to enclose the mounting plate 2 to form the housing 1.

[0064] In this embodiment, taking magnesium alloy as the casting material for the shell 1 as an example, the aluminum alloy mounting plate 2 and the magnesium alloy shell 1 can make the power box have better corrosion resistance, anti-electromagnetic interference and lighter weight, better heat dissipation effect, uniform wall thickness, and better outer wall surface quality.

[0065] A second aspect of the present invention provides a die-casting mold used for die-casting any one of the above-mentioned LED display box frames, wherein a portion of the housing 1 is located between the mounting plate 2 and the die-casting mold.

[0066] It can be understood that the mold cavity of the die-casting mold is set according to the shape of the battery box. The mounting plate 2 is first placed on the die-casting mold, and the liquid casting material enters the mold cavity.

[0067] In one embodiment, when the mounting plate 2 includes the positioning posts 22 , the die-casting mold further includes positioning holes, and the positioning holes are arranged in a one-to-one correspondence with the positioning posts 22 . The positioning holes are used to accommodate the positioning posts 22 and form a limit with the mounting plate 2 .

[0068] It can be understood that by placing the positioning column 22 correspondingly on the positioning hole of the die-casting mold, the shape and position of the positioning hole are set one-to-one with the positioning column 22, ensuring that the mounting plate 2 does not fall off or shift during the impact of the liquid casting material.

[0069] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0071] In view of the above detailed description, these and other changes can be made to these embodiments, and this written description includes the best mode embodiments to disclose the utility model. The scope of the patent obtained by the utility model is defined by the claims, and the claims are not limited by the content of the present disclosure. The protection scope of the utility model is not limited thereto. Any technician familiar with the technical field within the scope disclosed by the utility model, according to the technical solution and its concept of the utility model, makes equivalent replacement or change, which is within the protection scope of the utility model.

Claims

1. A LED display box frame, characterized in that: It includes a shell and a mounting plate, wherein the mounting plate is used to contact a power source, the shell is a die-casting, and the mounting plate is a profile part. A part of the shell is located on one side of the mounting plate and contacts the mounting plate, and a part of the shell is surrounded on the outer peripheral side of the mounting plate and contacts the mounting plate.

2. The LED display box frame according to claim 1, characterized in that: The mounting plate comprises a plate body and a positioning column, wherein the positioning column is arranged on the plate body and protrudes from the plate body.

3. The LED display box frame according to claim 2, characterized in that: The mounting plate also includes a glue pulling position which is arranged at the edge of the plate body and is recessed inwardly, and a plurality of the glue pulling positions are all located in the same horizontal plane.

4. The LED display box frame according to claim 3, characterized in that: The glue pulling position is arranged along the outer edge of the plate body, and the distance between two adjacent glue pulling positions arranged in the same direction is the same.

5. The LED display box frame according to claim 4, characterized in that: The housing comprises a mounting groove, which is formed by die-casting a liquid casting material around the mounting plate. The shape of the mounting groove is adapted to the mounting plate so that the outer peripheral wall of the mounting plate contacts the inner peripheral wall of the mounting groove.

6. The LED display box frame according to claim 5, characterized in that: The mounting groove further comprises a convex portion, which is located in the glue pulling position and extends toward the mounting plate.

7. The LED display box frame according to any one of claims 2 to 6, characterized in that: The surface of the mounting plate for contacting the power supply is flat and smooth and / or its shape is adapted to the power supply. There are at least four positioning posts, which are symmetrically arranged in the edge area of ​​the plate body, and the distance between the end faces of several positioning posts and the plate body is the same.

8. The LED display box frame according to any one of claims 2 to 6, characterized in that: A protruding limiting portion is provided on the surface of the plate body facing the shell, and the limiting portion is located at the periphery of the plate body.

9. The LED display box frame according to any one of claims 1 to 6, characterized in that: The housing is formed by die-casting of cast aluminum alloy and / or magnesium alloy, and the mounting plate is processed from aluminum alloy.

10. A die-casting mold, characterized in that: Applied to die-casting of an LED display box frame as described in any one of claims 1-9, the mounting plate includes a positioning column, the die-casting mold includes a positioning hole, the positioning holes are arranged in a one-to-one correspondence with the positioning columns, the positioning holes are used to accommodate the positioning columns and form a limit with the mounting plate.

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