Magnetic attraction structure, LED display screen module and mold

Abstract

The utility model relates to a magnetic attraction structure, LED display screen module and mould belong to LED display screen technical field, this magnetic seat structure is used for the front maintenance LED display screen, specifically includes the magnet seat, its first end surface is equipped with the soldering tin runner, the soldering tin runner is used for even tin distribution and the subsidiary soldering exhaust, second end surface is equipped with the joint, the joint is used for the magnet of joint and the magnet seat magnetism is attracted, first end surface and second end surface are the axial both ends of magnet seat. The scheme provided by the utility model can realize soldering tin even distribution and soldering exhaust optimization through setting up the soldering tin runner, and the magnet is fixed through the joint, has the advantages of improving the soldering quality, ensuring the module surface flatness and facilitating the magnet dismounting maintenance.

Description

TECHNICAL FIELD

[0001] The utility model relates to LED display screen technical field especially relates to a magnetic attraction structure, LED display screen module and mould. BACKGROUND

[0002] As a new type of display technology that can adapt to complex building shapes, flexible LED display screens have been widely used in arc, round corner, cylindrical and other special-shaped display scenes in recent years. Flexible LED display screens can be divided into front maintenance, rear maintenance and front and rear maintenance according to the maintenance method, and the front maintenance design is mainly aimed at the convenient disassembly and assembly requirements of the module. The core component of the flexible LED display screen is the flexible LED display module, which is usually assembled by LED lamp panel, copper column, double-sided adhesive, soft glue bottom shell, magnet seat and magnetic sheet, and the copper column, magnet seat and magnetic sheet form a magnetic attraction structure for fixing the module. The copper column needs to be welded to the PCB pad position by a chip mounter, but due to the processing error of the copper column and the deficiency of the soldering process, the surface of the module after splicing is prone to unevenness, which seriously affects the display effect and product competitiveness. In addition, the existing magnet seat structure has problems such as uneven tin distribution and poor exhaust during welding, which leads to unstable welding quality and further aggravates the unevenness of the module surface. At the same time, the magnet installation and disassembly process of the magnet seat is relatively complicated, which lacks convenience and affects the maintenance efficiency of the module. SUMMARY

[0003] In order to overcome the problems in the related art, the utility model provides a magnetic attraction structure, which can realize uniform distribution of solder and welding exhaust optimization through the setting of solder flow channel, and stably fix the magnet through the joint part, having the advantages of improving welding quality, ensuring the flatness of the module surface and facilitating the disassembly and maintenance of the magnet.

[0004] The utility model discloses a first aspect provides a kind of magnetic attraction structure, for front maintenance LED display screen, including magnet seat, its first end surface is equipped with solder flow channel, the solder flow channel is used for even tin distribution and auxiliary welding exhaust, second end surface is equipped with joint part, the joint part is used for installing magnet, the first end surface and second end surface are the axial two ends of magnet seat.

[0005] That is, in the implementation manner of the utility model, solder flow channel and joint part for engaging magnet are designed on the axial two ends of magnet seat respectively, solder flow channel realizes the uniform distribution of solder and the optimization of welding exhaust, which improves the welding quality, and the joint part cooperates with the magnet to simplify the front maintenance operation.

[0006] In some embodiments, the distribution form of the solder flow channel includes any one of a ring shape, a grid shape and a radial shape.

[0007] The solder flow channel is designed in a ring, grid or radial distribution form, which can adapt to different welding scene requirements, and further improve the solder flow uniformity and structural adaptability.

[0008] In some embodiments, the solder flow channel has a depth of 0.5mm-1mm and a width of 0.5mm-2mm. Limiting the depth and width of the solder flow channel to 0.5mm-1mm ensures the balance between solder flowability and exhaust efficiency, and can avoid welding defects or insufficient structural strength caused by improper size.

[0009] In some embodiments, the joint includes at least two arc-shaped ring walls arranged on the second end surface, the arc-shaped ring walls enclosing a chamber for accommodating the magnet, the chamber being in interference fit with the magnet, and adjacent arc-shaped ring walls forming a tool socket for inserting a tool to remove the magnet.

[0010] Specifically, the arc-shaped ring walls enclose the chamber in interference fit with the magnet, preventing the magnet from loosening or falling off; the tool socket design supports quick disassembly or replacement of the magnet, which can improve the maintenance efficiency.

[0011] In some embodiments, the tool socket has a U-shaped or rectangular shape, and the opening width is 1mm-3mm.

[0012] On the basis of the above specific embodiments, the U-shaped or rectangular tool socket ensures compatibility with general tools, reduces the difficulty of maintenance operation, and avoids the risk of socket deformation.

[0013] In some embodiments, the inner side of the arc-shaped ring wall is further provided with a rib extending in the circumferential direction, and the circumferential direction of the magnet is provided with an annular groove for clamping the rib. The design of the rib and the annular groove can enhance the friction force between the magnet and the chamber, and further improve the long-term reliability of the magnetic structure.

[0014] In some embodiments, the height of the rib is 0.3mm-0.5mm, which ensures the stability of the magnet while avoiding installation difficulties or structural weakness problems caused by excessive height.

[0015] In some embodiments, the magnet seat is powder sintered.

[0016] The second aspect of the utility model provides a LED display screen module, including lamp board, soft bottom shell and above-mentioned magnetic attraction structure, the soft bottom shell bonds the lamp board, the soft bottom shell is equipped with a plurality of installation hole for inlaying the magnet seat, the lamp board is equipped with a plurality of pads corresponding with installation hole, the shape of pad is matched with solder flow channel.

[0017] That is, in the implementation manner of the utility model, the matching design of the soft bottom shell mounting hole and the lamp plate pad in the module ensures precise fitting of the magnetic base structure and improves the overall welding precision and display flatness of the module.

[0018] The utility model discloses a third aspect provides a kind of mould, the mould is used to manufacture the magnetic attraction structure described above, the mould includes mutually buckling upper die and lower die, the upper die has first cavity, the bottom of the first cavity is equipped with the first protruding structure of forming soldering channel, the lower die has second cavity, the bottom of the second cavity is equipped with the second protruding structure of forming joint.

[0019] That is, in the implementation manner of the utility model, the mould is accurately formed soldering channel and joint by upper and lower die protruding structure, ensures the consistency of the magnetic base structure of batch production, reduces processing cost and improves yield.

[0020] From the above technical solution, it can be seen that the magnetic attraction structure, the LED display screen module and the mould provided by the utility model omit the original copper column design in structure, the soldering channel is arranged on the first end face of the magnet base to realize uniform tin distribution and exhaust, and the joint is arranged on the second end face to simplify the magnet installation, systematically solve the copper column welding defects and magnet easy to fall off in the traditional scheme, simplify the assembly sequence of the LED display screen module, and finally realize the LED display screen module with high reliability and easy maintenance.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and other objects, features and advantages of the utility model will become more apparent from the following detailed description of exemplary embodiments of the utility model, taken in conjunction with the accompanying drawings in which, in the exemplary embodiments of the utility model, the same reference numerals are usually used to represent the same components.

[0023] Figure 1 It is the structure schematic view of the magnetic attraction structure shown in the utility model embodiment;

[0024] Figure 2 It is another structure schematic view of the magnetic attraction structure shown in the utility model embodiment;

[0025] Figure 3 It is the explosion schematic view of the magnetic attraction structure shown in the utility model embodiment;

[0026] Figure 4 It is the explosion schematic view of the LED display screen module shown in the utility model embodiment;

[0027] Figure 5Is the structure schematic diagram of the mold shown in the embodiment of the utility model.

[0028] Reference signs:

[0029] 1, magnet seat; 10, solder flow channel; 11, joint; 110, arc-shaped ring wall; 111, tool socket; 112, rib; 2, magnet;

[0030] 3, LED lamp plate; 30, solder pad; 4, soft bottom shell; 40, mounting hole; 51, upper mold; 52, lower mold. DETAILED DESCRIPTION

[0031] The preferred embodiments of the utility model will be described in more detail below with reference to the drawings. Although the preferred embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to make the utility model more thorough and complete, and to fully convey the scope of the utility model to those skilled in the art.

[0032] The terms used in the utility model are only for the purpose of describing specific embodiments, and are not intended to limit the utility model. The singular forms "a", "said" and "the" used in the utility model and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein means and includes any or all possible combinations of one or more associated listed items.

[0033] In order to solve the above problems, the researchers noticed that there was solder accumulation at the connection between the copper column and the magnet seat, and speculated that the lack of solder flowability was the main reason for the residual bubbles. By analyzing the copper column, it was found that the soldering surface of the copper column and the lamp plate lacked a channel to guide the flow of solder, and the gas could not be effectively discharged. In order to solve this problem, a specific form of groove structure was set on the end face of the magnet seat to optimize the distribution of solder, and finally the technical content proposed by the utility model was formed.

[0034] The technical solutions of the embodiments of the utility model are described in detail below with reference to the drawings.

[0035] Figure 1 Is the structure schematic diagram of the magnetic attraction structure shown in the embodiment of the utility model.

[0036] Referring to Figures 1 to 3The utility model provides a kind of magnetic attraction structure, for front maintenance LED display screen, including magnet seat 1, its first end surface is equipped with soldering tin flow channel 10, the soldering tin flow channel 10 is used for even tin and auxiliary soldering exhaust, second end surface is equipped with joint 11, the joint 11 is used for installing magnet 2, the first end surface and second end surface are the axial two ends of magnet seat 1.

[0037] Wherein, the axial two ends of magnet seat 1 are welding surface and magnetic attraction surface respectively, welding surface is used to cooperate with the soldering pad 30 of LED lamp plate 3, and the magnetic attraction surface is attached to the iron case under the action of magnet 2, the material of magnet seat 1 can be selected from metal materials, which is formed by milling or powder sintering, the soldering tin flow channel 10 refers to the continuous groove structure inwardly recessed on the welding surface of magnet seat 1, which guides the molten solder to flow along the preset path, thereby promoting gas exhaust and improving the uniformity of solder distribution between magnet seat 1 and LED lamp plate 3, the joint 11 refers to the mounting cavity outwardly recessed on the magnetic attraction surface of magnet seat 1, for example, an arc-shaped ring wall 110 is used to enclose a chamber, and magnet 2 is fixed by interference fit, the shape of magnet 2 is adapted to the joint, which can be circular, square or irregular.

[0038] When assembling the flexible LED display module, a layer of soldering tin is printed on the LED lamp plate by printing, and then magnet seat 1 is placed on the soldering pad 30 of LED lamp plate 3 using a chip mounter, the soldering pad 30 has a groove matched with the soldering tin flow channel 10, and the molten solder uniformly diffuses in the flow channel during the welding process, which can avoid local accumulation to form a protrusion. The continuous extension form of soldering tin flow channel 10 can guide bubbles to move along the groove to the edge to overflow, reduce welding pores, and improve the parallelism between the welding surface of magnet seat 1 and the plane of LED lamp plate 3.

[0039] Compared with the prior art, the copper column of the traditional scheme needs to be welded to the position of the soldering pad 30 of LED lamp plate 3 by a chip mounter, but due to uneven solder paste coating, improper reflow soldering temperature control or insufficient matching precision of the copper column and the soldering pad 30, the copper column is often tilted or unevenly tinned after welding. This problem directly causes imbalance of local support force of the module, and further causes display surface concave-convex phenomenon. The traditional magnet seat 1 and the copper column are designed in a split type, which needs to weld the copper column first and then install the magnet seat 1, and the process is complex and depends on the precision of manual operation. The present scheme actively guides the solder flow path through flow channel design, eliminating welding bubbles. The existing magnet 2 fixing method uses simple adhesive or buckle structure, which is easy to cause displacement due to vibration, and the interference fit joint 11 of the present scheme improves positioning accuracy while maintaining assembly convenience.

[0040] In a preferred embodiment, the distribution form of soldering tin flow channel 10 includes any one of annular, grid and radial.

[0041] Specifically, the annular distribution refers to the annular structure formed by the solder flow channel 10 surrounding the center point of the magnet base 1 welding surface, and the annular structure also has an extended groove communicating with the outer peripheral wall of the magnet base 1. The grid distribution is formed by the vertically and horizontally intersecting straight flow channels. The radial distribution is the straight or curved flow channel extending outward from the center point of the welding surface. The solder flow channel 10 can be realized by powder injection molding or milling. Through the specific distribution form of annular, grid or radial, a controllable liquid solder flow path is formed during the welding process, which ensures that the solder uniformly covers the pad 30 area during the welding process, reduces the welding defects caused by local lack of solder or bubble residue, and improves the assembly precision and display effect consistency of the LED display screen module.

[0042] In a preferred embodiment, the depth of the solder flow channel 10 is 0.5mm-1mm, and the width is 0.5mm-2mm, which can ensure that the solder is fully filled in the flow channel, and can avoid solder overflow or uneven distribution caused by too deep or too wide flow channel. The size of the flow channel makes the solder uniformly cover the pad 30 during welding, while assisting in discharging gas and reducing welding defects.

[0043] In a preferred embodiment, the joint 11 includes at least two arc-shaped ring walls 110 provided on the second end surface, the arc-shaped ring walls 110 enclosing a cavity accommodating the magnet 2, the cavity being in interference fit with the magnet 2, and adjacent arc-shaped ring walls 110 forming a tool insertion port 111 for inserting a tool to remove the magnet 2.

[0044] Further, the tool insertion port 111 is U-shaped or rectangular, and the opening width is 1mm-3mm.

[0045] In a preferred embodiment, the inner side of the arc-shaped ring wall 110 is provided with a rib 112 extending in the circumferential direction, and the circumferential direction of the magnet 2 is provided with an annular groove for clamping the rib 112.

[0046] Specifically, when the magnet 2 is installed in the cavity enclosed by the arc-shaped ring wall 110, the annular groove on the surface of the magnet 2 and the rib 112 on the inner side of the arc-shaped ring wall 110 form axial limiting. When the magnet 2 is subjected to external force and tends to rotate, the rib 112 is embedded in the groove to form a physical barrier, effectively eliminating the circumferential displacement of the magnet 2 in the cavity. The tool insertion space is reserved in the area of the tool insertion port 111 between adjacent arc-shaped ring walls 110 to perform the magnet 2 dismounting operation.

[0047] Further, the height of the rib 112 is 0.3mm-0.5mm.

[0048] Further, the magnet base 1 is powder sintered. Specifically, one or more metal powders and a lubricant are mixed together, and then the mixed powder is subjected to pressure forming and sintering treatment to obtain the magnet base 1.

[0049] Referring to Figure 4 The utility model further puts forward a kind of LED display screen module, including LED lamp plate 3, soft bottom shell 4 and magnetic attraction structure, soft bottom shell 4 bonds LED lamp plate 3, soft bottom shell 4 is equipped with a plurality of installation holes 40 for embedding magnet seat 1, LED lamp plate 3 is equipped with a plurality of corresponding solder pad 30 with installation hole 40, the shape of solder pad 30 is matched with soldering tin runner 10.

[0050] Specifically, soft bottom shell 4 is fixed on the back of LED lamp plate 3 by double-sided adhesive, the position of installation hole 40 corresponds with the axial projection of magnet seat 1, so that magnet seat 1 is embedded in installation hole 40 and forms close cooperation with soft bottom shell 4.Solder pad 30 on LED lamp plate 3 covers the first end surface area of magnet seat 1, soldering tin is evenly filled by the matching shape of solder pad 30 and soldering tin runner 10, to avoid soldering tin overflow or uneven distribution.Magnet seat 1's joint 11 fixes magnet 2, so that module can be quickly installed to display frame by magnetic attraction.

[0051] In some embodiments, the inner wall of installation hole 40 can be provided with a guide slope to automatically correct the position when magnet seat 1 is embedded.The shape of solder pad 30 can be designed as a concentric circular ring structure corresponding to annular soldering tin runner 10, or a radial stripe structure corresponding to radial runner.

[0052] Through the above technical scheme, the utility model solves the problem of module surface concave-convex caused by copper column processing error, and optimizes the welding quality by the shape matching of solder pad 30 and soldering tin runner 10, to avoid soldering tin accumulation or gas hole, so as to improve the long-term reliability of module splicing flatness and magnetic attraction structure.

[0053] Referring to Figure 5 The utility model further puts forward a mold for manufacturing magnetic attraction structure, the mold includes mutually buckling upper die 51 and lower die 52, upper die 51 has first cavity, and the bottom of first cavity is equipped with the first protruding structure of forming soldering tin runner 10, and lower die 52 has second cavity, and the bottom of second cavity is equipped with the second protruding structure of forming joint 11.

[0054] Specifically, the upper die 51 and lower die 52 of the mold form complete cavity in closed state, the first protruding structure forms the soldering tin runner 10 of preset shape on the first end surface of magnet seat 1, for example annular or radial distribution, so that tin paste can flow uniformly and discharge gas when welding;Second protruding structure forms joint 11 on the second end surface of magnet seat 1, for example, the cavity surrounded by arc-shaped ring wall 110 is used to fix magnet 2 and reserve tool insertion port 111.

[0055] The above has described various embodiments of the present application, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles, practical application, or improvement of technology in the market of the embodiments, or to enable other ordinary skilled in the art to understand the embodiments disclosed herein.

Claims

1. A magnetic attraction structure for a front maintenance LED display, characterized in that, The magnet base (1) has a solder flow channel (10) on the first end surface for uniform solder distribution and auxiliary soldering exhaust, and a joint (11) on the second end surface for mounting a magnet (2). The first and second end surfaces are the axial ends of the magnet base (1).

2. The magnetic attraction structure of claim 1, wherein, The solder flow channel (10) can have any of a ring shape, a grid shape, and a radial shape.

3. The magnetic attraction structure of claim 2, wherein, The solder flow channel (10) has a depth of 0.5-1 mm and a width of 0.5-2 mm.

4. The magnetic attraction structure of claim 1, wherein, The joint (11) includes at least two arc-shaped ring walls (110) on the second end surface, which enclose a cavity for receiving the magnet (2). The cavity is in interference fit with the magnet (2), and adjacent arc-shaped ring walls (110) form a tool socket (111) for inserting a tool to remove the magnet (2).

5. The magnetic attraction structure of claim 4, wherein, The tool socket (111) has a U shape or a rectangular shape, and an opening width of 1-3 mm.

6. The magnetic attraction structure of claim 4, wherein, The arc-shaped ring walls (110) have a circumferentially extending rib (112) on the inner side, and the magnet (2) has a circumferentially extending annular groove for engaging the rib (112).

7. The magnetic attraction structure of claim 6, wherein, The rib (112) has a height of 0.3-0.5 mm.

8. The magnetic attraction structure of claim 1, wherein, The magnet base (1) is formed by powder sintering.

9. An LED display screen module, characterized in that, The soft bottom shell (4) is bonded to the LED lamp panel (3), and has a plurality of mounting holes (40) for embedding the magnet base (1). The LED lamp panel (3) has a plurality of pads (30) corresponding to the mounting holes (40), and the pads (30) have a shape matching the solder flow channel (10).

10. A mold for manufacturing the magnetically attracted structure according to any one of claims 1-8, comprising an upper mold (51) and a lower mold (52) that are buckled to each other. The upper mold (51) has a first cavity with a first protrusion structure on the bottom for forming the solder flow channel (10). The lower mold (52) has a second cavity with a second protrusion structure on the bottom for forming the joint (11).

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