A transformer core blank for liquid crystal display

Abstract

The invention discloses a transformer magnetic core blank for a liquid crystal display, comprising a blank bottom plate, a middle column and side columns symmetrically arranged on both sides of the middle column are arranged on the upper surface of the blank bottom plate, and the blank also comprises a sink groove arranged on the lower surface of the blank bottom plate, the sink groove comprises a sink groove I located in the middle of the blank bottom plate, a sink groove II located on the wide side of the blank bottom plate, and a sink groove III located on the long side of the blank bottom plate, the channel direction of the sink groove I extends along the length direction of the blank bottom plate and is arranged perpendicular to the extension direction of the middle column, there are two groups of sink grooves II, which are respectively arranged on the wide sides of the blank bottom plate, and the sink grooves II in each group are all concave toward the middle along the wide side of the blank bottom plate; there are two groups of sink grooves III, which are respectively arranged on the long sides of the blank bottom plate, and the sink grooves III in each group are all concave toward the middle along the long side of the blank bottom plate. The magnetic core blank is not easy to be damaged or deformed during the sintering process, and the finished product made of the magnetic core blank has the characteristics of high power and strong heat dissipation performance.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic core blanks, and in particular to a transformer magnetic core blank for a liquid crystal display. Background Art

[0002] In recent years, with the continuous progress of the electronics industry, LCD TVs have developed rapidly towards energy saving, lightweight and thinness. Applying magnetic cores to LED or OLED LCD TVs can reduce the height of PCB boards and ultimately reduce the overall thickness of LCD TVs, which is conducive to the thinning production of LCD TVs. However, it puts forward further requirements for the structure of the magnetic cores.

[0003] The magnetic core is a sintered magnetic metal oxide composed of a mixture of various iron oxides. The production process of the magnetic core consists of five steps: particle preparation, pressing, sintering, grinding and inspection. Pressing is a method of using a press to press the particles with the help of a mold to produce a magnetic core blank, and then the blank is sintered in a nitrogen kiln. If the density of the formed magnetic core blank is uneven, it is very easy to deform after sintering, resulting in poor core size, which directly affects the quality of the product. Therefore, how to reduce the defective rate of magnetic cores is a problem that technical personnel in this field are committed to solving. Summary of the invention

[0004] The object of the present invention is to overcome the deficiencies of the prior art and provide a transformer core blank for a liquid crystal display.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a transformer core blank for a liquid crystal display, comprising a blank bottom plate, a middle column and side columns symmetrically arranged on both sides of the middle column are arranged on the upper surface of the blank bottom plate, the middle column extends along the width direction of the blank bottom plate, and the side columns are located at the two ends of the length direction of the blank bottom plate, the blank also includes a sink groove arranged on the lower surface of the blank bottom plate, and the sink groove includes a sink groove I located in the middle of the blank bottom plate, a sink groove II located on the wide side of the blank bottom plate, and a sink groove located on the long side of the blank bottom plate. Ⅲ, the groove direction of the sink groove I extends along the length direction of the bottom plate of the blank and is arranged perpendicular to the extension direction of the center column. There are two groups of sink grooves II, which are respectively arranged on the wide sides of the bottom plate of the blank. The sink grooves II in each group are recessed toward the middle along the wide sides of the bottom plate of the blank, and each group of sink grooves II includes two sink grooves II symmetrically arranged on both sides of the sink groove I; There are two groups of sink grooves III, which are respectively arranged on the long sides of the bottom plate of the blank. The sink grooves III in each group are recessed toward the middle along the long sides of the bottom plate of the blank, and each group of sink grooves III includes two sink grooves III symmetrically arranged on both sides of the center column.

[0006] Preferably, in the sinking tank, the depth of sinking tank I is greater than the depth of sinking tank III and less than the depth of sinking tank II.

[0007] Preferably, the width of the sink Ⅰ is 1.2 to 1.5 times the width of the center column.

[0008] Preferably, the height of the middle column is equal to that of the side columns, the width of the side columns is 1 / 2 to 1 / 3 of the width of the middle column, the spacing between the side columns and the middle column is 2 to 3 times the width of the middle column, and the spacing between the side columns and the middle column is 5 times or more of the height of the middle column.

[0009] Preferably, transition slopes are respectively provided on both sides of the long sides of the upper surface of the bottom plate of the blank toward the side surfaces of the bottom plate of the blank.

[0010] Preferably, the width of the sink groove II is greater than the width of the side column.

[0011] Preferably, four vertex corners of the upper surfaces of the side columns and the middle column are all provided with arc chamfers.

[0012] Preferably, the groove surface length of the sink groove II is equal to the groove surface length of the sink groove III, and the groove surface width of the sink groove II is smaller than the groove surface width of the sink groove III.

[0013] Preferably, the groove surface length and width of the sink groove III are equal.

[0014] Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: the transformer core blank for liquid crystal display of the present invention has a sink groove on the bottom surface of the blank bottom plate, which not only increases the strength of the blank, but also increases the molding density of the blank, so that the sintered finished product will not be deformed, thereby improving the product qualification rate, and the distance between the side column and the middle column is set to be much larger than the height of the middle column, thereby increasing the heat dissipation area of ​​the entire magnetic core. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 A front view of a transformer magnetic core blank for a liquid crystal display according to the invention;

[0016] Attached Figure 2 For attachment Figure 1 A top view of

[0017] Attached Figure 3 For attachment Figure 1 Bottom view of

[0018] Among them: 1. blank bottom plate; 2. middle column; 3. side column; 4. sink groove I; 5. sink groove II; 6. sink groove III; 7. transition slope; 8. arc chamfer. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] A transformer core blank for a liquid crystal display comprises a blank bottom plate 1, wherein a middle column 2 and side columns 3 symmetrically arranged on both sides of the middle column 2 are arranged on the upper surface of the blank bottom plate 1. Figure 1 , 2 The center column 2 extends along the width direction of the blank bottom plate 1, and the side columns 3 are located at the two ends of the blank bottom plate 1 in the length direction. The blank also includes a sink groove provided on the lower surface of the blank bottom plate 1, see Figure 3 As shown, the sink groove includes a sink groove I4 located in the middle of the blank bottom plate 1, a sink groove II6 located on the wide side of the blank bottom plate 1, and a sink groove III7 located on the long side of the blank bottom plate 1. The groove direction of the sink groove I4 extends along the length direction of the blank bottom plate 1 and is arranged perpendicular to the extension direction of the center column 2. There are two groups of sink grooves II6, which are respectively arranged on the wide sides of the blank bottom plate 1 on both sides. The sink grooves II6 in each group are recessed toward the middle along the wide side of the blank bottom plate 1, and each group of sink grooves II6 includes two sink grooves II6 symmetrically arranged on both sides of the sink groove I4; there are two groups of sink grooves III7, which are respectively arranged on the long sides of the blank bottom plate 1 on both sides. The sink grooves III7 in each group are recessed toward the middle along the long side of the blank bottom plate 1, and each group of sink grooves III7 includes two sink grooves III7 symmetrically arranged on both sides of the center column 2.

[0021] Here, in the sink, the depth of sink Ⅰ4 is greater than that of sink Ⅲ7 and less than that of sink Ⅱ6. Because the forming density of the middle part of the blank is weaker than that of the side part during the blank forming, the depth of sink Ⅰ4 is set to be greater than that of sink Ⅲ7. Since the position of sink Ⅱ6 is placed below the side column 3, the forming density in the width direction is the weakest, so the depth of sink Ⅱ6 is the deepest. Here, the width of sink Ⅱ6 is greater than the width of the side column 3. Since the part between the side column 3 and the middle column 2 has a large span and a thin thickness, and the density is weaker than that of the side column 3, the product is too low in density when it leaves the pressing die cavity and is easy to be demolded and cracked. Therefore, the width of sink Ⅱ6 is greater than the width of the side column 3, so that the powder in the die cavity during pressing is re-pressurized at sink Ⅱ6 to increase the density.

[0022] In this example, the groove surface length of the sink groove II 6 is equal to the groove surface length of the sink groove III 7, and the groove surface width of the sink groove II 6 is smaller than the groove surface width of the sink groove III 7. The groove surface length and width of the sink groove III 7 are equal.

[0023] Here, the width of the sink groove Ⅰ4 is 1.2 to 1.5 times the width of the middle column 2. The height of the middle column 2 is equal to the height of the side column 3, the width of the side column 3 is 1 / 2 to 1 / 3 of the width of the middle column 2, the distance between the side column 3 and the middle column 2 is 2 to 3 times the width of the middle column 2, and the distance between the side column 3 and the middle column 2 is 5 times or more the height of the middle column 2. By setting the distance between the side column 3 and the middle column 2 to be much larger than the height of the middle column 2, the magnetic core manufactured later has a large bottom, strong power, and greatly increased heat dissipation area.

[0024] Here, transition slopes 7 are respectively provided on both sides of the long sides of the upper surface of the blank bottom plate 1 toward the side of the blank bottom plate 1, see Figure 1 As shown. This makes it difficult for the adhesive tape used for packaging to be worn out during the later packaging.

[0025] In this example, the four top corners of the upper surfaces of the side columns 3 and the middle column 2 are all provided with arc chamfers 8, see Figure 2 By providing the arc chamfer 8, the adhesive tape is not easily worn during the subsequent magnetic core packaging.

[0026] In this example, the size of the magnetic core blank is 70.74mm long, 58.75mm wide, 6.7mm high, and 3.06mm thick. The length of the groove Ⅰ4 is 70.74mm, the width is 16mm, and the depth is 0.2mm; the length of the groove Ⅱ6 is 10mm, the width is 5.2mm, and the depth is 0.3mm; the length of the groove Ⅲ7 is 10mm, the width is 10mm, and the depth is 0.1mm. The magnetic core blank with this size is not easy to deform or break during the sintering process. At the same time, the magnetic core blank with this structure has high power and strong heat dissipation performance. After the magnetic core blank is sintered, the bottom groove will be ground flat during the grinding process, so that the outer surface of the finished product is smooth.

[0027] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A transformer core blank for a liquid crystal display, characterized in that: The invention comprises a blank bottom plate, wherein a middle column and side columns symmetrically arranged on both sides of the middle column are arranged on the upper surface of the blank bottom plate, wherein the middle column extends along the width direction of the blank bottom plate, and the side columns are located at the two end portions in the length direction of the blank bottom plate, and the blank further comprises sink grooves arranged on the lower surface of the blank bottom plate, wherein the sink grooves comprise sink groove I located in the middle of the blank bottom plate, sink groove II located on the wide side of the blank bottom plate, and sink groove III located on the long side of the blank bottom plate, wherein the channel direction of the sink groove I extends along the length direction of the blank bottom plate and is arranged perpendicular to the extension direction of the middle column, wherein the sink groove II has two groups, which are respectively arranged on the wide sides of the blank bottom plate, and the sink grooves II in each group are recessed toward the middle along the wide side of the blank bottom plate. Each group of sink grooves II includes two sink grooves II symmetrically arranged on both sides of the sink groove I; there are two groups of sink grooves III, which are respectively arranged on the long sides of the bottom plate of the blank, and the sink grooves III in each group are recessed toward the middle along the long sides of the bottom plate of the blank. Each group of sink grooves III includes two sink grooves III symmetrically arranged on both sides of the middle column. In the sink grooves, the groove depth of the sink groove I is greater than the groove depth of the sink groove III and less than the groove depth of the sink groove II. The width of the sink groove I is 1.2 to 1.5 times the width of the middle column, the height of the middle column is equal to the height of the side column, the width of the side column is 1 / 2 to 1 / 3 of the width of the middle column, the spacing between the side column and the middle column is 2 to 3 times the width of the middle column, and the spacing between the side column and the middle column is 5 times or more of the height of the middle column.

2. The transformer core blank for a liquid crystal display according to claim 1, characterized in that: Transition slopes are respectively arranged on both long sides of the upper surface of the blank bottom plate toward the side surfaces of the blank bottom plate.

3. The transformer core blank for a liquid crystal display according to claim 1, characterized in that: The width of the sink groove II is greater than the width of the side column.

4. The transformer core blank for a liquid crystal display according to claim 1, characterized in that: The four top corners of the upper surfaces of the side columns and the middle column are all provided with arc chamfers.

5. The transformer core blank for a liquid crystal display according to claim 1, characterized in that: The groove surface length of the sink groove II is equal to the groove surface length of the sink groove III, and the groove surface width of the sink groove II is smaller than the groove surface width of the sink groove III.

6. The transformer core blank for a liquid crystal display according to claim 1, characterized in that: The groove surface length and width of the sink groove III are equal.

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