WO2021129609A1 - Led箱体、led箱体的制造方法及led显示屏 - Google Patents

Led箱体、led箱体的制造方法及led显示屏 Download PDF

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Publication number
WO2021129609A1
WO2021129609A1 PCT/CN2020/138292 CN2020138292W WO2021129609A1 WO 2021129609 A1 WO2021129609 A1 WO 2021129609A1 CN 2020138292 W CN2020138292 W CN 2020138292W WO 2021129609 A1 WO2021129609 A1 WO 2021129609A1
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Prior art keywords
rib
led box
led
reinforcing rib
groove
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Ceased
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PCT/CN2020/138292
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English (en)
French (fr)
Inventor
吴瑞彬
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Guangzhou Shiyuan Electronics Thecnology Co Ltd
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Guangzhou Shiyuan Electronics Thecnology Co Ltd
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Publication of WO2021129609A1 publication Critical patent/WO2021129609A1/zh
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes

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  • This application relates to the technical field of display screens, for example, to an LED box body, a method for manufacturing the LED box body, and an LED display screen.
  • the LED display is a flat panel display, which is formed by splicing small LED module panels.
  • Each LED module panel includes an LED box and a display module.
  • the display module is installed by magnetic attraction or screw fixing. On the LED box.
  • the structure of the LED box in the related art is shown in Figures 1 and 2.
  • the box includes a box body 1'with a flat plate structure and a surrounding wall 2'annularly arranged on the front circumference of the box body 1'.
  • the box body A plurality of regular criss-cross stiffeners 3'are arranged on the front of 1'and located in the surrounding wall 2'.
  • the front of the box body 1' is also provided with a magnet fixing column 4', which is far away from the box body.
  • One end of 1' is used to install the magnet of the magnetic display module.
  • the related technology has the following defects: 1.
  • the box body is produced by die-casting. When the box body is die-casted out of the mold, the four corners of the box body (that is, the corners of the surrounding wall 2') wrap the back mold of the mold, causing the mold to be ejected.
  • the area where the thimble pushes out of the middle of the box is arched backwards (that is, to the back of the box); 2.
  • the tightening force when the main ribs are contracted will deform the box; 3.
  • the ribs 3'of the box are regularly distributed horizontally and vertically, which makes the four corners of the box have poor resistance to external force deformation and easily cause warping of the four corners; 4.
  • the back of the box It is relatively flat. When the box body is die-casted out of the mold, the back side is easy to stick to the front mold of the mold, causing the box body to be deformed.
  • the present application provides an LED box body and an LED display screen, which have strong anti-deformation ability, high flatness and good display effect.
  • the present application also provides a method for manufacturing the LED box, which can reduce the deformation of the LED box during the manufacturing process and improve the flatness after manufacturing and molding.
  • the present application provides an LED box, including a body and a surrounding wall surrounding the body, a side of the body provided with the surrounding wall is a first side, and the first side
  • the upper part is criss-crossed with main reinforcing ribs, the main reinforcing ribs are provided with a plurality of first notches at intervals along the length direction of the main reinforcing ribs, and the main reinforcing ribs divide the space in the surrounding wall into a plurality of regions, and the regions are arranged
  • There is a secondary reinforcement rib at least one end of the secondary reinforcement rib is connected to the main reinforcement rib extending in the first direction in length, and a second notch is provided at the joint between the two, the first notch and the second notch All face away from the main body.
  • the auxiliary reinforcing rib has at least two corners along the length direction of the auxiliary reinforcing rib.
  • the auxiliary reinforcing ribs include a first rib, a second rib, and a third rib that are vertically connected in sequence, and the first rib and the third rib are respectively It is arranged on two opposite sides of the second rib, and the corner position is formed at the junction of two adjacent ribs.
  • the main reinforcing rib includes a first reinforcing rib and a second reinforcing rib perpendicular to the first reinforcing rib, and the length of the first reinforcing rib extends in the second direction, There is a set distance between the auxiliary reinforcing rib and the first reinforcing rib and the surrounding wall extending in the second direction, and the first direction is perpendicular to the second direction.
  • the surrounding wall includes two first wall panels arranged in parallel along the first direction and two second wall panels arranged in parallel along the second direction.
  • the main reinforcement rib includes a first reinforcement rib and a second reinforcement rib perpendicular to the first reinforcement rib, the length of the first reinforcement rib extends along the second direction, the The two ends of the first reinforcing rib are respectively connected to the two second wall plates, and the two ends of the second reinforcing rib are respectively connected to the two first wall plates.
  • a side of the body facing away from the surrounding wall is a second side, a groove is provided on the second side, and a position corresponding to the groove is formed on the first side Raised.
  • a plurality of the grooves are spaced on the second side surface along a second direction, and the second direction is perpendicular to the first direction.
  • the included angle between the groove wall and the groove bottom of the groove is ⁇ , and a plurality of the grooves are directed from the center of the body in the second direction toward the edge of the body.
  • the angle ⁇ of the grooves decreases successively.
  • the length of the plurality of grooves decreases sequentially from the center of the body in the second direction toward the edge of the body.
  • the groove includes a first groove and a second groove arranged at an included angle, and the first groove communicates with the second groove and runs along the first direction of the body.
  • the first groove and the second groove are both inclined from the center of the body toward the edge of the body.
  • the number of the grooves located on both sides of the center line of the second direction of the body is equal and the shapes are symmetrical.
  • the main reinforcing rib includes a first reinforcing rib, the length of the first reinforcing rib extends along the second direction, and the surrounding wall includes two Second wall panels arranged in parallel in two directions, the two ends of the first reinforcing ribs are respectively connected to the centers of the two second wall panels;
  • the secondary reinforcement ribs located on both sides of the first reinforcement rib are symmetrically arranged along the first reinforcement rib, and the secondary reinforcement ribs located on both sides of the center line in the second direction of the main body are symmetrically arranged.
  • a magnet fixing column is provided on the body corresponding to each of the areas.
  • the present application provides a method for manufacturing an LED box body, providing a casting mold with a thimble with broken ribs, and casting the LED box body blank to form a main reinforcement rib and a secondary reinforcement rib on the LED box body blank, And at the position where the main reinforcing rib, the main reinforcing rib and the auxiliary reinforcing rib intersect, the broken rib thimble is used to form a gap, and the LED box body is machined to form the LED box body.
  • a barbed thimble is arranged in the middle area of the rear mold of the casting mold, and after the LED box body blank is cast, the magnet in the middle of the LED box body blank is fixed
  • the end of the column uses the barbed thimble to form barbs to demold the rear mold.
  • the barbed thimble pulls the barbs to form a pulling force opposite to the demolding direction of the rear mold.
  • the barbed thimble is separated from the barb, the LED box body blank is machined and the barb is removed to expose the magnet mounting surface on the magnet fixing column.
  • the present application also provides an LED display screen, which includes a plurality of spliced LED boxes, and each of the LED boxes is provided with a display module.
  • Figure 1 is a schematic front view of a related LED box.
  • Figure 2 is a schematic diagram of the back of the related LED box.
  • FIG. 3 is a three-dimensional schematic diagram of the LED box according to the embodiment of the present application from a first viewing angle.
  • FIG. 4 is a perspective schematic diagram of the LED box according to the embodiment of the present application from a second perspective.
  • Fig. 5 is a schematic front view of an LED box according to an embodiment of the application.
  • Fig. 6 is a schematic cross-sectional view of an LED box according to an embodiment of the application.
  • Fig. 7 is a three-dimensional schematic diagram of an LED box according to an embodiment of the application (showing the position of the barbed thimble).
  • Fig. 8 is a schematic cross-sectional view of the LED box according to the embodiment of the application (showing the position of the barbed thimble).
  • Fig. 9 is a three-dimensional schematic diagram of an LED box according to an embodiment of the application (showing the position of the broken rib thimble).
  • FIG. 10 is a partial enlarged schematic diagram of the LED box according to the embodiment of the application.
  • Main stiffener 31. The first gap; 32. The second gap; 33. The first stiffener; 34. The second stiffener; 35. The third gap;
  • connection shall be interpreted broadly, for example, they may be fixedly connected, detachably connected, or integrated. ; 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 internal communication between two components or the interaction relationship between two components.
  • connection shall be interpreted broadly, for example, they may be fixedly connected, detachably connected, or integrated. ; 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 internal communication between two components or the interaction relationship between two components.
  • the "above” or “below” of the first feature of the second feature may include direct contact between the first and second features, or may include the first and second features Not in direct contact but through other features between them.
  • “above”, “above” and “above” the second feature of the first feature include the first feature being directly above and obliquely above the second feature, or it simply means that the level of the first feature is higher than that of the second feature.
  • the “below”, “below” and “below” the first feature of the second feature include the first feature directly below and obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.
  • this application provides an LED cabinet that can be used for small-pitch LED displays.
  • the small-pitch LED displays in the industry refer to LED displays with a spacing between LED lamp beads less than 2.5mm .
  • the LED display screen is usually formed by splicing multiple LED module panels.
  • Each LED module panel includes an LED box body and a display module that can be detachably installed on the LED box body.
  • the LED boxes are spliced by connectors.
  • the LED module panel refers to a single module unit that constitutes the LED display.
  • Each LED module panel is an independent structure. Multiple LED module panels can be spliced according to certain rules to realize large-screen display.
  • the display module includes the main board and is connected to the main board.
  • the main board is used to control the operation of the LED lamp beads on the lamp board, and the main board can realize the communication connection between adjacent LED module panels, which is convenient for overall control.
  • the LED box of the embodiment of the present application is formed by casting. It includes a main body 1 and a surrounding wall 2 surrounding the main body 1.
  • the main body 1 is provided with a side surface of the surrounding wall 2. It is the first side surface 11, the first side surface 11 is provided with main reinforcing ribs 3 criss-crossed, and the main reinforcing ribs 3 are provided with a plurality of first notches 31 at intervals along its length.
  • the main reinforcing ribs 3 divide the space in the surrounding wall 2 into A plurality of regions are provided with a secondary reinforcement rib 4 in the region, at least one end of the secondary reinforcement rib 4 is connected to the main reinforcement rib 3 whose length extends in the first direction, and the connection between the two is provided with a second notch 32 and a first notch 31 Both the second notch 32 and the second notch 32 face away from the main body 1.
  • the main reinforcing rib 3 can be prevented from generating a large shrinking force during the die-casting cooling process, and by providing the second notch 32, the stress at the connection between the main reinforcing rib 3 and the auxiliary reinforcing rib 4 can be eliminated. Furthermore, the deformation of the LED box can be effectively avoided.
  • the first direction in this embodiment is the width direction in FIG. 3, and the second direction is the length direction in FIG. 3.
  • the notch such as the first notch 31 and the second notch 32 refers to the structure recessed on the reinforcing rib.
  • the opening of the notch faces a side surface of the LED box body where the LED module panel is mounted on the light board and the main board.
  • the body 1 is rectangular, the first direction of the body 1 is its width direction, and the second direction of the body 1 is its length direction, that is, the first direction is perpendicular to the second direction.
  • the main stiffener 3 on the body 1 includes a first stiffener 33 and a second stiffener 34.
  • the length of the first stiffener 33 extends along the length of the body 1, and the length of the second stiffener 34 extends along the width of the body 1.
  • the body 1 can be rectangular, square, or other regular shapes, such as polygonal structures such as equilateral triangles, pentagons, and hexagons.
  • the secondary reinforcing rib 4 has at least two corners in its length direction.
  • the number of distribution of the auxiliary reinforcing ribs 4 can be reduced, thereby reducing the shrinking force of the auxiliary reinforcing rib 4 during the casting and cooling process, and the auxiliary reinforcing rib 4 with the corner position can also increase the strength of the LED box.
  • the secondary ribs 4 with corners have higher strength.
  • the secondary reinforcing rib 4 includes a first rib 41, a second rib 42 and a third rib 43 that are vertically connected in sequence, and the first rib 41 and the third rib 43 are respectively arranged on the second rib.
  • the junction of two adjacent ribs forms a corner position.
  • the Z-shaped secondary rib 4 is easier to manufacture and shape, and the processing difficulty can be reduced on the premise of ensuring that the secondary rib 4 has sufficient strength.
  • two corner positions can be set, and more corner positions can be set, that is, the shape of the secondary stiffener 4 can be Z-shaped or other shapes.
  • the surrounding wall 2 includes two second wall panels 22 arranged in parallel along the length direction and two first wall panels 21 arranged in parallel along the width direction.
  • the secondary reinforcement ribs 4 are respectively connected to the first reinforcement rib 33 and the first wall panel 21. There is a set distance between them, and the size of this distance can be set according to needs. It is only necessary that the secondary reinforcing rib 4 is not connected with or contacting the first reinforcing rib 33 and the first wall 21. This design can prevent the secondary reinforcement ribs 4 from being connected to the longer main reinforcement ribs 3 and the longer surrounding wall 2, thereby reducing the stress concentration on the secondary reinforcement ribs 4 after casting and avoiding the deformation of the LED box.
  • the LED box body is provided with a first reinforcing rib 33 and three second reinforcing ribs 34, and the longitudinal ends of the first reinforcing rib 33 are respectively connected to the centers of the two second wall panels 22,
  • the three second reinforcing ribs 34 are equally spaced along the length of the LED box.
  • the four reinforcing ribs divide the space enclosed by the wall 2 into 8 areas, and each area is provided with a Z-shaped auxiliary reinforcing rib. 4.
  • the secondary reinforcement ribs 4 in the area on both sides of the first reinforcement rib 33 are arranged symmetrically along the first reinforcement rib 33, and the secondary reinforcement ribs 4 located on both sides of the second reinforcement rib 34 in the middle are arranged symmetrically along the second reinforcement rib 34 .
  • the number of the first reinforcing rib 33 and the second reinforcing rib 34 can also be adjusted according to the overall size of the LED box.
  • the first side surface 11 of the LED box body is further provided with a magnet fixing column 5, and the end of the magnet fixing column 5 away from the first side surface 11 is fixed with a magnet, and this magnet is used to connect with the back of the display module of the LED display screen.
  • the metal plate is magnetically fitted.
  • At least four magnet fixing posts 5 are provided in each area, and the part of the magnet fixing posts 5 in the middle area of the main body 1 has an end away from the first side surface 11, which is pre-cast and molded before the magnet is installed.
  • Barb 51 this barb 51 cooperates with the barbed thimble 6 in the rear mold in the casting mold to realize the drawing of the middle of the LED box.
  • the barbed thimble 6 can be along the demolding direction of the rear mold A pulling force is applied to the deviation direction (this direction is the direction of the arrow shown in Figure 8) to effectively prevent the LED box from being deformed during the demolding process of the rear mold, thereby ensuring the flatness of the LED box.
  • the barb 51 can be machined and removed, exposing the magnet mounting surface, without adding additional operating procedures, and ensuring that the LED box body is not deformed during demolding Requirements.
  • nine magnet fixing posts 5 are arranged in each area, the area is square, four corners are arranged, one is arranged in the center of the four sides, and one is arranged in the center of the area, that is, nine magnets are fixed.
  • the columns 5 are evenly distributed in 3 rows and 3 columns.
  • the magnet fixing column 5 located in the center of the area is arranged on the auxiliary reinforcing rib 4, and the magnet fixing column 5 can use the auxiliary reinforcing rib 4 to increase the strength to prevent the magnet fixing column 5 from being deformed.
  • the remaining magnet fixing columns 5 are all formed with barbs 51 during casting.
  • the main reinforcing rib 3 is further provided with a third notch 35, the width of the third notch 35 is greater than the width of the first notch 31, and the first notch 31 is recessed at the bottom of the third notch 35.
  • the bottoms of the first gap 31 and the second gap 32 may be connected to the first side surface 11 or have a set distance from the first side surface 11.
  • a side of the body 1 facing away from the surrounding wall 2 is a second side 12, the second side 12 is disposed opposite to the first side 11, and a groove is provided on the second side 12 13.
  • a protrusion 14 is formed at the position of the first side surface 11 corresponding to the groove 13.
  • a plurality of grooves 13 are provided at intervals on the second side surface 12 along the length direction of the LED box.
  • the arrangement of the plurality of grooves 13 reduces the contact area between the second side surface 12 and the front mold as much as possible.
  • the included angle between the groove wall of the groove 13 and the groove bottom is ⁇ , and the included angle of the plurality of grooves 13 from the center of the length direction of the main body 1 toward the edge of the main body 1 ⁇ gradually becomes smaller.
  • the larger the angle between the groove wall and the groove wall the easier it is to demold. Therefore, in the process of demolding the LED box, the resistance of the middle part of the LED box is small when demolding, and the resistance of the surrounding demolding is large, which is minimized.
  • the mold-out deformation at the middle position of the LED box body can also reduce the mold-out deformation at the four corners of the LED box body due to the large touch resistance around it, that is, the corner position deformation of the surrounding wall 2 is reduced.
  • the included angle ⁇ of all the grooves 13 is an obtuse angle.
  • the groove 13 provided at an obtuse angle makes it easier to demold the second side surface 12 of the LED box, that is, it is easier to demold the front mold.
  • the lengths of the plurality of grooves 13 from the center of the length direction of the main body 1 toward the edge of the main body 1 gradually decrease.
  • the grooves 13 of different lengths make the LED box different in the length direction by the front mold pulling force.
  • the groove 13 includes a first groove 131 and a second groove 132 arranged at an included angle.
  • the first groove 131 and the second groove 132 communicate with each other and are symmetrical along the center of the width direction of the body 1, and the first groove 131 Both the second groove 132 and the second groove 132 are inclined from the center of the main body 1 toward the edge of the main body 1.
  • a non-linear groove 13 structure is provided, and the inclination direction of the first groove 131 and the second groove 132 is inclined from the middle to the end in the length direction, which makes it easier for the LED box to be demolded after casting.
  • the included angle between the first groove 131 and the second groove 132 is 120 degrees.
  • the number of grooves 13 on both sides of the center line in the longitudinal direction of the main body 1 is equal in number and symmetrical in shape.
  • the symmetrically arranged groove 13 structure can ensure that the stress points of the LED box body at various positions are uniform, and effectively prevent the LED box body from deforming.
  • six grooves 13 are provided on the second side surface 12 of the LED box.
  • the two grooves 13 located in the middle have the longest length, and the two grooves 13 located at the two ends of the length direction have the longest length. Minimum length.
  • the number of grooves 13 on the LED box can be six, and it can also be increased or decreased according to the actual length and width of the LED box.
  • the angle ⁇ of the groove 13 in the middle is 113°, and the angle ⁇ of the groove 13 adjacent to the lengthwise end of the LED box is 99°, and it is located between the two grooves 13
  • the angle ⁇ of the groove 13 may be 107°.
  • the embodiment of the present application also provides a method for manufacturing an LED box body.
  • a casting mold with a broken rib thimble 7 is provided to cast the LED box body blank to form on the LED box body blank
  • the processing difficulty can be reduced.
  • the gap formed during the casting process can eliminate the LED box in the main reinforcement 3 and main reinforcement 3 in time.
  • the internal stress at the position where it intersects with the secondary reinforcing rib 4 prevents the LED box from being deformed after demolding.
  • the barbed thimble 6 is arranged in the middle area of the rear mold of the casting mold. After the LED box blank is cast, the barbed thimble 6 is formed at the end of the magnet fixing column 5 in the middle of the LED box blank. 51. Demold the rear mold. During the demolding process, the barb thimble 6 pulls the barb 51 to form a pulling force opposite to the direction of the rear mold. After the rear mold overcomes the pulling force, the barb thimble 6 separates from the barb 51, and the LED is machined. The box body is blank and the barb 51 is removed to expose the magnet mounting surface on the magnet fixing column 5.
  • the middle area of the LED box can be pulled when the mold is drawn to prevent the middle area of the LED box from being deformed.
  • the barb 51 of the LED box can be milled flat with the help of the post-machined magnet fixing column 5 Barb 51, leaving no trace.
  • the main reinforcing rib can be prevented from producing a large shrinking force during the cooling process of die-casting molding, and by setting the second notch, the stress at the connection between the main reinforcing rib and the auxiliary reinforcing rib can be eliminated, and then Effectively avoid the deformation of the LED box.

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Abstract

一种LED箱体、LED箱体的制造方法及LED显示屏，其中，LED箱体包括本体（1）和环设在本体（1）周部的围壁（2），本体（1）设有围壁（2）的一侧面为第一侧面（11），第一侧面（11）上纵横交错设置有主加强筋（3），主加强筋（3）沿其长度方向间隔设置多个第一缺口（31），主加强筋（3）将围壁（2）内的空间分隔为多个区域，区域内设置有副加强筋（4），副加强筋（4）的至少一端与长度沿第一方向延伸的主加强筋（3）连接，二者的连接处设置有第二缺口（32），第一缺口（31）和第二缺口（32）均朝向远离本体（1）的一侧。

Description

LED箱体、LED箱体的制造方法及LED显示屏
本公开要求在2019年12月23日提交中国专利局、申请号为201911340077.2的中国专利申请的优先权，以上申请的全部内容通过引用结合在本公开中。
技术领域
本申请涉及显示屏技术领域，例如涉及一种LED箱体、LED箱体的制造方法及LED显示屏。
背景技术
LED显示屏是一种平板显示器，其由一个个小小的LED模块面板拼接而成，每个LED模块面板均包括LED箱体和显示模组，显示模组通过磁吸或螺丝固定的方式安装在LED箱体上。随着LED显示技术的提升，像素点的点间距越来越小，对于箱体正面的平面度要求越来越高。相关技术中的LED箱体的结构如图1和2所示，箱体包括平板结构的箱体主体1′和环形设置在箱体主体1′的正面周部的围壁2′，箱体主体1′的正面并位于围壁2′内设置有多个规则的纵横交错的加强筋3′，箱体主体1′的正面还设置有磁铁固定柱4′，磁铁固定柱4′远离箱体主体1′的一端用于安装磁吸显示模组的磁铁。相关技术存在以下缺陷：1、箱体采用压铸的方式生产，在箱体毛坯压铸出模时，箱体的四角(即围壁2′的转角处)包住模具后模，造成出模时，顶针顶出箱体中间的区域发生向后(即向箱体的背面)拱曲变形；2、箱体内的加强筋3′数量多，单方面布置于箱体正面，在压铸箱体冷却后，主筋位收缩时的缩紧力将箱体拉变形；3、箱体加强筋3′呈规则的横竖分布，使得箱体四角抗外力变形效果差，容易引起四角的翘曲；4、箱体背面较为平整，在箱体毛坯压铸出模时，背面容易粘住模具前模，造成箱体出模变形。
发明内容
本申请提供一种LED箱体及LED显示屏，其抗变形能力强，平整度高，显示效果好。
本申请还提供一种LED箱体的制造方法，其可以减少LED箱体在制造过程中的变形，提升制造成型后的平整度。
第一方面，本申请提供一种LED箱体，包括本体和环设在所述本体周部的围壁，所述本体设有所述围壁的一侧面为第一侧面，所述第一侧面上纵横交错设置有主加强筋，所述主加强筋沿其长度方向间隔设置多个第一缺口，所述主加强筋将所述围壁内的空间分隔为多个区域，所述区域内设置有副加强筋，所述副加强筋的至少一端与长度沿第一方向延伸的所述主加强筋连接，二者的连接处设置有第二缺口，所述第一缺口和所述第二缺口均朝向远离所述本体的一侧。
作为LED箱体的一种可选方案，沿所述副加强筋的长度方向所述副加强筋至少具有两个拐角位。
作为LED箱体的一种可选方案，所述副加强筋包括依次垂直连接的第一筋条、第二筋条和第三筋条，所述第一筋条和所述第三筋条分别设置在所述第二筋条相对的两侧，相邻两个筋条的连接处形成所述拐角位。
作为LED箱体的一种可选方案，所述主加强筋包括第一加强筋和与所述第一加强筋垂直的第二加强筋，所述第一加强筋的长度沿第二方向延伸，所述副加强筋分别与所述第一加强筋以及长度沿所述第二方向延伸的所述围壁之间具有设定距离，所述第一方向垂直于所述第二方向。
作为LED箱体的一种可选方案，所述围壁包括两个沿所述第一方向平行设 置的第一壁板和两个沿第二方向平行设置的第二壁板，所述第一方向垂直于所述第二方向，所述主加强筋包括第一加强筋和与所述第一加强筋垂直的第二加强筋，所述第一加强筋的长度沿第二方向延伸，所述第一加强筋的两端分别连接两个所述第二壁板，所述第二加强筋的两端分别连接两个所述第一壁板。
作为LED箱体的一种可选方案，所述本体背离所述围壁的一侧面为第二侧面，所述第二侧面上设有凹槽，所述第一侧面对应凹槽的位置形成有凸起。
作为LED箱体的一种可选方案，沿第二方向在所述第二侧面上间隔设置多个所述凹槽，所述第二方向垂直于所述第一方向。
作为LED箱体的一种可选方案，所述凹槽的槽壁与槽底的夹角为α，由所述本体的所述第二方向的中心朝向所述本体的边缘多个所述凹槽的夹角α依次变小。
作为LED箱体的一种可选方案，由所述本体的所述第二方向的中心朝向所述本体的边缘多个所述凹槽的长度依次变小。
作为LED箱体的一种可选方案，所述凹槽包括呈夹角设置的第一槽和第二槽，所述第一槽与所述第二槽连通并沿所述本体的第一方向的中心对称，所述第一槽和所述第二槽均由所述本体的中心朝向所述本体的边缘倾斜。
作为LED箱体的一种可选方案，位于所述本体的所述第二方向的中心线两侧的所述凹槽的数量相等且形状对称。
作为LED箱体的一种可选方案，所述主加强筋包括一个第一加强筋，所述第一加强筋的长度沿所述第二方向延伸，所述围壁包括两个沿所述第二方向平行设置的第二壁板，所述第一加强筋的两端分别连接两个所述第二壁板的中心；
位于所述第一加强筋两侧的所述副加强筋的沿所述第一加强筋对称设置，位于所述本体的第二方向的中心线的两侧的所述副加强筋对称设置。
作为LED箱体的一种可选方案，所述本体上对应每个所述区域均设置有磁铁固定柱。
第二方面，本申请提供一种LED箱体的制造方法，提供带有断筋顶针的铸造模具，铸造LED箱体毛坯，以在所述LED箱体毛坯上形成主加强筋和副加强筋，并在所述主加强筋、所述主加强筋与所述副加强筋相交的位置利用所述断筋顶针形成缺口，机加工所述LED箱体毛坯成型所述LED箱体。
作为LED箱体的制造方法的一种可选方案，在所述铸造模具的后模的中部区域布置倒钩顶针，铸造所述LED箱体毛坯后，在所述LED箱体毛坯中部的磁铁固定柱的端部利用所述倒钩顶针形成倒钩，使所述后模脱模，脱模过程中所述倒钩顶针拉动所述倒钩形成一个与所述后模脱模方向相反的拉力，所述后模克服所述拉力后所述倒钩顶针与所述倒钩脱离，机加工所述LED箱体毛坯并去除所述倒钩，以露出所述磁铁固定柱上的磁铁安装面。
第三方面，本申请还提供一种LED显示屏，包括多个拼接的LED箱体，每个所述LED箱体上均设置有显示模组。
附图说明
下面根据附图和实施例对本申请作进一步详细说明。
图1为相关的LED箱体的正面示意图。
图2为相关的LED箱体的背面示意图。
图3为本申请实施例的LED箱体的第一视角的立体示意图。
图4为本申请实施例的LED箱体的第二视角的立体示意图。
图5为本申请实施例的LED箱体的正视示意图。
图6为本申请实施例的LED箱体的剖视示意图。
图7为本申请实施例的LED箱体的立体示意图(示出倒钩顶针的位置)。
图8为本申请实施例的LED箱体的剖视示意图(示出倒钩顶针的位置)。
图9为本申请实施例的LED箱体的立体示意图(示出断筋顶针的位置)。
图10为本申请实施例的LED箱体的局部放大示意图。
图1和2中：
1′、箱体主体；2′、围壁；3′、加强筋；4′、磁铁固定柱。
图3至10中：
1、本体；11、第一侧面；12、第二侧面；13、凹槽；131、第一槽；132、第二槽；14、凸起；
2、围壁；21、第一壁板；22、第二壁板；
3、主加强筋；31、第一缺口；32、第二缺口；33、第一加强筋；34、第二加强筋；35、第三缺口；
4、副加强筋；41、第一筋条；42、第二筋条；43、第三筋条；
5、磁铁固定柱；51、倒钩；
6、倒钩顶针；
7、断筋顶针。
具体实施方式
下面将结合附图对本申请实施例的技术方案作进一步的详细描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本申请的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固 定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据情况理解上述术语在本申请中的含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
参照图3至10，本申请提供一种LED箱体，可用于小间距的LED显示屏，行业内的小间距的LED显示屏是指：LED灯珠之间的间距小于2.5mm的LED显示屏。
此LED显示屏通常由多个LED模块面板拼接成型，每个LED模块面板均包括LED箱体和可拆卸安装在LED箱体上的显示模组，LED箱体之间通过连接件拼接。LED模块面板是指构成LED显示屏的单个模块单元，每个LED模块面板是一个独立的结构，多个LED模块面板按照一定规则拼接后实现大屏幕显示，而显示模组包括主板和与主板连接的灯板，主板用于控制灯板上的LED灯珠工作，且主板可以实现相邻的LED模块面板之间的通信连接，便于整体控制。
如图3和图4所示，本申请实施例的LED箱体采用铸造的方式成型，其包括本体1和环设在本体1周部的围壁2，本体1设有围壁2的一侧面为第一侧面11，第一侧面11上纵横交错设置有主加强筋3，主加强筋3沿其长度方向间隔 设置多个第一缺口31，主加强筋3将围壁2内的空间分隔为多个区域，区域内设置有副加强筋4，副加强筋4的至少一端与长度沿第一方向延伸的主加强筋3连接，二者的连接处设置有第二缺口32，第一缺口31和第二缺口32均朝向远离本体1的一侧。通过设置第一缺口31，可以避免主加强筋3在压铸成型冷却过程中产生较大的缩紧力，通过设置第二缺口32，可以消除主加强筋3和副加强筋4连接处的应力，进而有效地避免LED箱体发生变形。本实施例中的第一方向为图3中的宽度方向，第二方向为图3中的长度方向。
第一缺口31和第二缺口32这类缺口是指凹陷在加强筋上的结构，在本实施例中，缺口的开口朝向LED箱体安装LED模块面板的灯板和主板的一侧面。
在本申请的一个实施例中，本体1为矩形，本体1的第一方向为其宽度方向，本体1的第二方向为其长度方向，即第一方向垂直于第二方向。
本体1上的主加强筋3包括第一加强筋33和第二加强筋34，其中，第一加强筋33的长度沿本体1的长度方向延伸，第二加强筋34的长度沿本体1的宽度方向延伸。当然，本体1可以为矩形，还可以正方形，或者其他规则的形状，比如等边三角形、五边形、六边形等多边形结构。
在一实施例中，副加强筋4在其长度方向至少具有两个拐角位。通过设置拐角位，可以减少副加强筋4的分布数量，进而减少副加强筋4铸造成型冷却过程中的缩紧力，且此带拐角位的副加强筋4还可以增加LED箱体的强度，相对于直条形的加强筋，带有拐角位的副加强筋4的强度更高。
在本实施例中，副加强筋4包括依次垂直连接的第一筋条41、第二筋条42和第三筋条43，第一筋条41和第三筋条43分别设置在第二筋条42相对的两侧，相邻两个筋条的连接处形成拐角位。Z字型的副加强筋4更易于制造成型，可以在保证副加强筋4具有足够的强度的前提下，降低加工难度。当然，在其他实 施例中，可以设置两个拐角位，还可以设置更多的拐角位，即副加强筋4的形状可以为Z字型，还可以为其他的形状。
围壁2包括两个沿长度方向平行设置的第二壁板22和两个沿宽度方向平行设置的第一壁板21，副加强筋4分别与第一加强筋33以及第一壁板21之间具有设定距离，这个距离的尺寸可以根据需要进行设定，只需要副加强筋4与第一加强筋33以及第一壁板21不连接也不接触。此设计可以避免副加强筋4与较长的主加强筋3和较长的围壁2连接，进而可以减少铸造后的副加强筋4上的应力集中，避免LED箱体发生变形。
在一实施例中，LED箱体上设置有一个第一加强筋33和三个第二加强筋34，第一加强筋33的长度方向的两端分别连接两个第二壁板22的中心，三个第二加强筋34沿LED箱体的长度方向等间距分布，这四个加强筋将围壁2围成的空间分隔为8个区域，每个区域内设置一个Z字型的副加强筋4，第一加强筋33两侧的区域内的副加强筋4沿第一加强筋33对称设置，位于中部的第二加强筋34两侧的副加强筋4沿此第二加强筋34对称设置。通过将主加强筋3的布置方式设置为上述一条第一加强筋33和三个第二加强筋34交错的结构，使得整个主加强筋3的布局更加合理，不会出现较密集的主加强筋3分布区域，同时配合每个区域内的副加强筋4可以实现较强的加强效果，并能尽可能减少铸造变形，使得LED箱体的平整度较高，另外，还可以降低LED箱体的制造成本。
第一加强筋33和第二加强筋34的数量，还可以根据LED箱体的整体大小进行调整。
在一实施例中，LED箱体的第一侧面11还设置有磁铁固定柱5，磁铁固定柱5远离第一侧面11的一端固定有磁铁，此磁铁用于与LED显示屏的显示模组 背面的金属板磁吸配合。
在本实施例中，每个区域内均设置有至少四个磁铁固定柱5，在位于本体1的中部的区域的部分磁铁固定柱5远离第一侧面11的一端在安装磁铁之前预先铸造成型有倒钩51，此倒钩51配合铸造模具中的后模内的倒钩顶针6实现对LED箱体中部进行拉近，在后模脱模过程中，倒钩顶针6可以沿后模脱模方向的背离方向(此方向为图8所示的箭头方向)施加一个拉力，有效防止LED箱体在后模脱模过程中发生变形，进而保证LED箱体的平整。另外，由于LED箱体在铸造成型后都会进行机加工，因此可以将倒钩51进行机加工去除，露出磁铁安装面，不会增加额外的操作工序，又能满足LED箱体脱模时不变形的要求。
在一实施例中，每个区域内设置九个磁铁固定柱5，区域为方形，四角设置有四个，四边的中心设置各设置有一个，区域的中心还设置有一个，即九个磁铁固定柱5呈3排3列均匀分布。特别地，位于区域中心的磁铁固定柱5设置在副加强筋4上，此磁铁固定柱5可以利用副加强筋4增加强度，防止磁铁固定柱5发生变形。位于LED箱体长度方向的中心的四个区域中除开邻近于第一壁板21的磁铁固定柱5外的其余磁铁固定柱5均在铸造时形成有倒钩51。
另外，主加强筋3上还设置有第三缺口35，第三缺口35的宽度大于第一缺口31的宽度，在第三缺口35的底部凹设形成此第一缺口31。第一缺口31和第二缺口32的底部可以连通至第一侧面11，也可以与第一侧面11具有设定距离。通过在主加强筋3上设置大缺口套设小缺口的结构，可以避免一次开设较大的缺口而过于降低了LED箱体的整体强度，这样的结构既可以保证LED箱体具有足够的强度，又可以将主加强筋3的应力降低到最小，即可以降低主加强筋3的缩紧力。
在一实施例中，如图4至6所示，本体1背离围壁2的一侧面为第二侧面 12，第二侧面12与第一侧面11相对设置，第二侧面12上设有凹槽13，第一侧面11对应凹槽13的位置形成有凸起14。通过在本体1的第二侧面12设置凹槽13，可以减少LED箱体在铸造过程中与铸造模具的前模的连接面积，进而保证LED箱体在前模脱模过程中，LED箱体的第二侧面12被拉变形，提升了LED箱体铸造成型后的平整度，而且，凹槽13在第一侧面11形成了凸起14，凸起14可以提高LED箱体在后期使用中的抗变形能力。
在本实施例中，沿LED箱体的长度方向在第二侧面12上间隔设置多个凹槽13。多个凹槽13的设置尽可能缩小第二侧面12与前模的接触面积。
在一实施例中，如图5和6所示，凹槽13的槽壁与槽底的夹角为α，由本体1的长度方向的中心朝向本体1的边缘多个凹槽13的夹角α依次变小。槽壁与槽壁的夹角越大越容易脱模，因此，在LED箱体脱前模的过程中，LED箱体中部脱模时的阻力小，四周的脱模的阻力大，最大限度地减少LED箱体中间位置的出模变形，同时由于四周的触摸阻力大，还可以减少LED箱体四角位置的出模变形，即减少围壁2的转角位置的变形。
可选地，所有凹槽13的夹角α均为钝角。钝角设置的凹槽13，更加易于LED箱体的第二侧面12脱模，即易于前模脱模。
另外，由本体1的长度方向的中心朝向本体1的边缘多个凹槽13的长度依次变小。不同长度的凹槽13使得LED箱体在长度方向上被前模拉扯的力有所不同，设置长度较长的凹槽13的区域前模对其拉扯的力越小，反之，则拉扯的力越大，在LED箱体脱前模的过程中，LED箱体中部脱模时的阻力小，四周的脱模的阻力大，最大限度地减少LED箱体中间位置的出模变形。
在一实施例中，凹槽13包括呈夹角设置的第一槽131和第二槽132，第一槽131与第二槽132连通并沿本体1的宽度方向的中心对称，第一槽131和第 二槽132均由本体1的中心朝向本体1的边缘倾斜。设置非直线的凹槽13结构，且第一槽131和第二槽132的倾斜方向由中部朝向长度方向的端部倾斜，这样更加便于LED箱体在铸造后后模脱模。
可选地，第一槽131和第二槽132之间的夹角为120度。
位于本体1的长度方向的中心线两侧的凹槽13的数量相等且形状对称。对称设置的凹槽13结构，可以保证LED箱体在各个位置的受力点均匀，有效防止LED箱体发生变形。
在本申请的一个实施例中，LED箱体的第二侧面12上设置6个凹槽13，位于中部的两个凹槽13的长度最长，位于长度方向的两端的两个凹槽13的长度最小。当然，LED箱体上的凹槽13的数量可以为6个，还可以根据实际的LED箱体的长度和宽度进行增减。
位于中部的凹槽13的夹角α的度数为113°，邻近于LED箱体的长度方向的端部的凹槽13的夹角α的度数为99°，位于这两个凹槽13之间的凹槽13的夹角α的度数可以为107°。
本申请实施例还提供一种LED箱体制造方法，如图3、图7至10所示，提供带有断筋顶针7的铸造模具，铸造LED箱体毛坯，以在LED箱体毛坯上形成主加强筋3和副加强筋4，并在主加强筋3、主加强筋3与副加强筋4相交的位置利用断筋顶针7形成缺口，机加工LED箱体毛坯成型LED箱体。通过利用布置断筋顶针7的方式在LED箱体的铸造过程中直接成型缺口，可以降低加工难度，同时铸造过程中成型的缺口可以及时地消除LED箱体在主加强筋3、主加强筋3与副加强筋4相交的位置的内应力，避免LED箱体在脱模后发生变形。
在本实施例中，在铸造模具的后模的中部区域布置倒钩顶针6，铸造LED箱体毛坯后，在LED箱体毛坯中部的磁铁固定柱5的端部利用倒钩顶针6形成 倒钩51，使后模脱模，脱模过程中倒钩顶针6拉动倒钩51形成一个与后模脱模方向相反的拉力，后模克服拉力后倒钩顶针6与倒钩51脱离，机加工LED箱体毛坯并去除倒钩51，以露出磁铁固定柱5上的磁铁安装面。利用倒钩顶针6，在出模时可以拉住LED箱体的中部区域，防止LED箱体的中部区域发生变形，同时LED箱体的倒钩51可以借助后期机加工磁铁固定柱5来铣平倒钩51，不留下痕迹。
于本文的描述中，需要理解的是，术语“上”等方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述和简化操作，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
在本说明书的描述中，参考术语“一实施例”等的描述意指结合该实施例的特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例。
此外，应当理解，虽然本说明书按照实施方式加以描述，但并非每个实施方式仅包含一个独立的技术方案，说明书的这种叙述方式仅仅是为清楚器件，本领域技术人员应当将说明书作为一个整体，各实施例中的技术方案也可以适当组合，形成本领域技术人员可以理解的其他实施方式。
本申请中，通过设置第一缺口，可以避免主加强筋在压铸成型冷却过程中产生较大的缩紧力，通过设置第二缺口，可以消除主加强筋和副加强筋连接处的应力，进而有效地避免LED箱体发生变形。

Claims (16)

  1. 一种LED箱体，包括本体和环设在所述本体周部的围壁，所述本体设有所述围壁的一侧面为第一侧面，所述第一侧面上纵横交错设置有主加强筋，所述主加强筋沿其长度方向间隔设置多个第一缺口，所述主加强筋将所述围壁内的空间分隔为多个区域，所述区域内设置有副加强筋，所述副加强筋的至少一端与长度沿第一方向延伸的所述主加强筋连接，二者的连接处设置有第二缺口，所述第一缺口和所述第二缺口均朝向远离所述本体的一侧。
  2. 根据权利要求1所述的LED箱体，其中，沿所述副加强筋的长度方向所述副加强筋至少具有两个拐角位。
  3. 根据权利要求2所述的LED箱体，其中，所述副加强筋包括依次垂直连接的第一筋条、第二筋条和第三筋条，所述第一筋条和所述第三筋条分别设置在所述第二筋条相对的两侧，相邻两个筋条的连接处形成所述拐角位。
  4. 根据权利要求1所述的LED箱体，其中，所述主加强筋包括第一加强筋和与所述第一加强筋垂直的第二加强筋，所述第一加强筋的长度沿第二方向延伸，所述副加强筋分别与所述第一加强筋以及长度沿所述第二方向延伸的所述围壁之间具有设定距离，所述第一方向垂直于所述第二方向。
  5. 根据权利要求1所述的LED箱体，其中，所述围壁包括两个沿所述第一方向平行设置的第一壁板和两个沿第二方向平行设置的第二壁板，所述第一方向垂直于所述第二方向，所述主加强筋包括第一加强筋和与所述第一加强筋垂直的第二加强筋，所述第一加强筋的长度沿第二方向延伸，所述第一加强筋的两端分别连接两个所述第二壁板，所述第二加强筋的两端分别连接两个所述第一壁板。
  6. 根据权利要求1所述的LED箱体，其中，所述本体背离所述围壁的一侧面为第二侧面，所述第二侧面上设有凹槽，所述第一侧面对应凹槽的位置形成 有凸起。
  7. 根据权利要求6所述的LED箱体，其中，沿第二方向在所述第二侧面上间隔设置多个所述凹槽，所述第二方向垂直于所述第一方向。
  8. 根据权利要求7所述的LED箱体，其中，所述凹槽的槽壁与槽底的夹角为α，由所述本体的所述第二方向的中心朝向所述本体的边缘多个所述凹槽的夹角α依次变小。
  9. 根据权利要求7所述的LED箱体，其中，由所述本体的所述第二方向的中心朝向所述本体的边缘多个所述凹槽的长度依次变小。
  10. 根据权利要求7至9任一项所述的LED箱体，其中，所述凹槽包括呈夹角设置的第一槽和第二槽，所述第一槽与所述第二槽连通并沿所述本体的第一方向的中心对称，所述第一槽和所述第二槽均由所述本体的中心朝向所述本体的边缘倾斜。
  11. 根据权利要求10所述的LED箱体，其中，位于所述本体的所述第二方向的中心线两侧的所述凹槽的数量相等且形状对称。
  12. 根据权利要求1至9任一项所述的LED箱体，其中，所述主加强筋包括一个第一加强筋，所述第一加强筋的长度沿所述第二方向延伸，所述围壁包括两个沿所述第二方向平行设置的第二壁板，所述第一加强筋的两端分别连接两个所述第二壁板的中心；
    位于所述第一加强筋两侧的所述副加强筋的沿所述第一加强筋对称设置，位于所述本体的第二方向的中心线的两侧的所述副加强筋对称设置。
  13. 根据权利要求1至9任一项所述的LED箱体，其中，所述本体上对应每个所述区域均设置有磁铁固定柱。
  14. 一种LED箱体的制造方法，其中，提供带有断筋顶针的铸造模具，铸造 LED箱体毛坯，以在所述LED箱体毛坯上形成主加强筋和副加强筋，并在所述主加强筋、所述主加强筋与所述副加强筋相交的位置利用所述断筋顶针形成缺口，机加工所述LED箱体毛坯成型所述LED箱体。
  15. 根据权利要求14所述的LED箱体的制造方法，其中，在所述铸造模具的后模的中部区域布置倒钩顶针，铸造所述LED箱体毛坯后，在所述LED箱体毛坯中部的磁铁固定柱的端部利用所述倒钩顶针形成倒钩，使所述后模脱模，脱模过程中所述倒钩顶针拉动所述倒钩形成一个与所述后模脱模方向相反的拉力，所述后模克服所述拉力后所述倒钩顶针与所述倒钩脱离，机加工所述LED箱体毛坯并去除所述倒钩，以露出所述磁铁固定柱上的磁铁安装面。
  16. 一种LED显示屏，包括多个拼接的LED箱体，每个所述LED箱体上均设置有显示模组，所述LED箱体为如权利要求1至13任一项所述的LED箱体。
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