CN220709885U - Alloy column and alloy column assembly suitable for flexible COB display screen - Google Patents
Alloy column and alloy column assembly suitable for flexible COB display screen Download PDFInfo
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- CN220709885U CN220709885U CN202322172412.0U CN202322172412U CN220709885U CN 220709885 U CN220709885 U CN 220709885U CN 202322172412 U CN202322172412 U CN 202322172412U CN 220709885 U CN220709885 U CN 220709885U
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- display screen
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- 239000000956 alloy Substances 0.000 title claims abstract description 67
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 67
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical group [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 239000000696 magnetic material Substances 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 17
- 229910052802 copper Inorganic materials 0.000 abstract description 15
- 239000010949 copper Substances 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000012545 processing Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 230000002493 climbing effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012372 quality testing Methods 0.000 description 1
- 238000011012 sanitization Methods 0.000 description 1
Abstract
An alloy column and an alloy column assembly suitable for a flexible COB display screen belong to the technical field of COB display screen production, and solve the problem that the processing quality of a PCB (printed Circuit Board) cannot be guaranteed due to the fact that partial chips are short-circuited in the PCB processing process caused by copper scraps in a copper column. The alloy column includes: the diameter of the first cylinder, the diameter of the second cylinder, the diameter of the third cylinder, the diameter of the fourth cylinder and the diameter of the fourth cylinder are sequentially reduced, the first cylinder, the second cylinder, the third cylinder and the fourth cylinder are coaxial and are sequentially connected end to form an integrated structure, and the fourth cylinder is provided with external threads. The alloy column assembly comprises the alloy column and a nut, and the nut is connected with a fourth cylinder of the alloy column. The utility model is suitable for the production scene of the flexible COB display screen.
Description
Technical Field
The utility model belongs to the technical field of COB display screen production, and particularly relates to a fastener used in COB display screen production.
Background
In recent years, along with the higher originality of the LED-COB display screen, the common special-shaped screen module can enable the LED-COB display screen to realize various changeable shapes like a changeable star, but in a long time before, the LED-COB special-shaped screen is realized by assembling or wrapping the traditional rectangular plane module, such as a common arc-shaped screen and a round screen. However, under the conditions that the radian of a display screen is small and the display form is more complex, the problems of joint and flatness of the joint and the edge wrapping of the special-shaped module cannot be solved, and then the problems of inconsistent display and mosaic of the display screen are caused, so that the whole display effect of the display screen is poor, the flexible COB display screen technology is generated for solving the problem, and the traditional COB display screen assembly technology is to realize simple hard connection between a copper column and a box body on the back of a PCB by using screws, so that the mode is obviously inapplicable to a flexible display substrate.
The main defects existing in the prior art are as follows: for the flexible COB display screen technology, the hard connection process of the traditional boxing process is easy to damage the process layer of the flexible substrate, the flatness after boxing is difficult to ensure, and the radian of the display screen is smaller and can not meet the splicing requirement.
In order to solve the above problems, an environment-friendly copper pillar bonding pad assembly suitable for a COB display screen is disclosed in patent document CN21608709U, and the disclosed copper pillar structure can effectively solve the above problems. However, the connection structure of this structure still uses the connection structure commonly used in the art, namely: adopt the screw fixation, it is more troublesome to maintain and dismantle, and the dismantlement in-process causes the destruction to the box easily, and in the large screen construction in-process, it is also comparatively loaded down with trivial details to replace PCB display element. In addition, during the reuse process, new problems are found: because this kind of structure can produce a large amount of copper cuttings in the course of working, owing to be internal thread structure, and the internal diameter is less, current cleaning means can't guarantee completely to cut the sanitization with interior thread aperture space interior micron order copper, this just results in, at the in-process that the copper post was used to the COB manufacturing process, can lead to partial chip short circuit owing to copper attached on the copper post can fall in PCB board front, because the chip short circuit that this kind of condition leads to, be difficult for finding in the quality testing process, more difficult maintenance, consequently, the existence of this problem leads to PCB board processingquality unable guarantee, be the urgent problem that needs to be solved in the field.
In view of this problem, the solution adopted in the prior art is to perform secondary cleaning of the used copper pillar before machining, which can solve the above-mentioned problem to some extent, but cannot overcome the problem by 100%, and also increases the machining cost.
Disclosure of Invention
The utility model provides an alloy column and a separated alloy column assembly suitable for a flexible COB display screen, which solve the problem that the processing quality of a PCB (printed Circuit Board) cannot be ensured due to short circuit of part of chips in the processing process of the PCB caused by copper scraps in a copper column.
An alloy post suitable for use in a flexible COB display screen, the alloy post comprising:
the diameter of the first cylinder, the diameter of the second cylinder, the diameter of the third cylinder, the diameter of the fourth cylinder and the diameter of the fourth cylinder are sequentially reduced, the first cylinder, the second cylinder, the third cylinder and the fourth cylinder are coaxial and sequentially connected end to form an integrated structure, and the fourth cylinder is provided with external threads;
further, the material of the alloy column comprises a magnetic material;
further, the magnetic material is iron, and the surface of the iron is plated with nickel;
further, the ratio of the diameters of the third cylinder to the fourth cylinder is 1.1-1.2;
further, the height of the first cylinder is 0.4-1mm;
further, the height of the third cylinder is 1-1.5mm;
further, the height of the fourth cylinder is 2-3mm;
further, the height of the second cylinder is 0.5-1mm;
further, the outer side of the second cylinder is provided with a plurality of sawteeth, the lateral section of each sawtooth is a right trapezoid, and the ratio of the upper bottom to the lower bottom of the right trapezoid is 0.3-0.5.
The utility model also provides an alloy column assembly suitable for the flexible COB display screen, which comprises an alloy column and a nut, wherein the alloy column is suitable for the flexible COB display screen, and the nut is in threaded connection with a fourth cylinder of the alloy column.
The utility model has the beneficial effects that:
compared with the prior art, the separated alloy column assembly suitable for the flexible COB display screen has the following beneficial effects:
in the prior art, the fixed connecting piece of the PCB always adopts a metal internal thread cylinder and then is matched with a screw to realize the fixed connection. The structure of the external thread can ensure that the cleaning process in the processing process can completely remove the attached copper scraps generated by the processing of the copper column.
Meanwhile, the alloy column is suitable for the COB manufacturing process, the structure of parts is smaller, in order to ensure the strength of the alloy column and the reliable connection of the alloy column and a PCB, and further the alloy column realizes the reliable connection and supporting function between the PCB and a box body, the structure of the alloy column fully considers the shape of the connection part with the PCB, ensures the welding reliability, fully considers the sufficient strength on the premise of small volume, and also has the adaptability to the existing connection structure. The specific effects are as follows:
1. the alloy column fourth cylinder adopts the external screw thread design, can guarantee the copper dust cleaning performance, avoids the copper dust to cause the chip short circuit in production process, reduces the unusual proportion of hair worm.
2. The diameter of the first cylinder of the alloy column is designed according to the inner diameter of the bonding pad, and under the premise of ensuring that the bonding pad is embedded smoothly, a good tin climbing effect in the SMT process can be ensured, so that the ground of the second cylinder of the alloy column is in close contact with the bonding pad, the flatness after being packaged is not affected by the consistency of the height after being welded, and the consistency of the surface is high.
3. The ratio of the third cylinder to the fourth cylinder of the alloy column is 1.1-1.2, so that the alloy column can play a good limiting role when the alloy nuts are combined.
4. The alloy column and the alloy nut are both magnetic materials, so that the whole-course magnetic assembly in the boxing process can be realized, the boxing process is more convenient, the damage rate of the flexible screen boxing process is effectively reduced, and the failure rate of the use of later products is reduced.
5. The edge of the second cylinder part of the alloy column adopts a step-type zigzag design mode, so that better tin climbing effect in the welding process can be ensured, and meanwhile, tin paste cavities in the welding process can be reduced.
6. The split alloy column assembly is designed, so that the replacement and maintenance of the alloy column in the later period are facilitated.
In the actual working process, the defect of the structure described in the patent document CN21608709U of the prior application is found in the use process, and the structure is more suitable for the production scene of the flexible COB display screen, can completely replace the original connecting part and is suitable for popularization and application in order to overcome the defect and improve the structure.
Drawings
Fig. 1 is a schematic structural diagram of an alloy column suitable for a flexible COB display screen according to an embodiment, wherein 1 is a first cylinder, 2 is a second cylinder, 3 is a third cylinder, 4 is a fourth cylinder, and 21 is a saw-toothed upper step surface22 is a sawtooth lower step surface D 1 For the diameter of the first cylinder, D 2 Is the diameter of the second cylinder, D 3 Diameter of the third cylinder, D 4 Is the diameter of the fourth cylinder, h 1 Is the height of the first cylinder, h 2 Is the height of the second cylinder, h 3 Is the height of the third cylinder, h 4 Is the height of the fourth cylinder, h 21 The upper bottom of the right trapezoid is provided with saw teeth;
fig. 2 is a schematic perspective view of an alloy pillar suitable for a flexible COB display screen according to an embodiment;
fig. 3 is a bottom view of fig. 1, in which θ 1 And theta 2 Opening angles of the saw teeth are respectively, and phi is the inter-tooth center interval angle;
fig. 4 is a schematic perspective view of a nut suitable for an alloy post of a flexible COB display screen according to the fourth embodiment;
fig. 5 is a schematic structural view of a nut suitable for an alloy pillar assembly of a flexible COB display screen according to a fourth embodiment, wherein D 5 D is the inner diameter of the nut 6 Is the outer diameter of the nut;
fig. 6 is a top view of fig. 5.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.
Embodiment one
The present embodiment will be described with reference to fig. 1 and 2.
An alloy post suitable for flexible COB display screen of this embodiment, it includes first cylinder 1, second cylinder 2 and third cylinder 3, the alloy post still includes: the diameter of the second cylinder 2, the diameter of the third cylinder 3, the diameter of the fourth cylinder 4 and the diameter of the first cylinder 1 are sequentially reduced, the diameters of the first cylinder 1, the diameters of the second cylinder 2, the diameters of the third cylinder 3 and the diameters of the fourth cylinder 4 are coaxial, and the diameters of the first cylinder, the second cylinder, the third cylinder and the diameters of the fourth cylinder 4 are sequentially connected end to form an integrated structure, and the fourth cylinder 4 is provided with external threads.
Specifically:
as shown in fig. 1, the diameters of the second cylinder 2, the third cylinder 3, the fourth cylinder 4 and the first cylinder 1 are respectively D 2 、D 3 、D 4 、D 1 D is 2 ﹥D 3 ﹥D 4 ﹥D 1 。
Diameter D of the third cylinder 3 and the fourth cylinder 4 3 、D 4 The ratio is 1.1-1.2;
the diameter of the positioning hole of the bonding pad and the diameter D of the first cylinder 1 during installation 1 The ratio is 0.9-1.
The height of the first cylinder is 0.4-1mm;
the height of the third cylinder is 1-1.5mm;
the height of the fourth cylinder is 2-3mm;
the height of the second cylinder is 0.5-1mm.
The alloy column is a surface nickel plating process.
The external screw thread that fourth cylinder 4 set up can effectively avoid the metal clastic residue in the machining process, avoids COB to show the short circuit risk, effectively improves the reliability of flexible COB display screen.
Second embodiment
The present embodiment will be described with reference to fig. 3.
This embodiment is a further example of the second cylinder 2 described in the alloy column for the flexible COB display screen according to the first embodiment.
The outer side of the second cylinder 2 according to this embodiment is provided with a plurality of saw teeth, the lateral section of the saw teeth is a right trapezoid, and the upper bottom h of the right trapezoid is provided with a plurality of saw teeth 21 ＝(0.3～0.5)h 2 。
Specifically:
as shown in fig. 3:
the upper step surface 21 of the second cylinder 2 described in this embodiment is a chamfer surface, and the lower step surface 22 is a flat surface.
Further, the saw teeth around the second cylinder 2 are two opening angles theta 1 And an opening angle theta 2 Alternately, the interdental center spacing angles are phi, theta in this embodiment 1 ＝52°，θ 2 =59°, Φ=30°; using two opening angles theta 1 And an opening angle theta 2 Alternatively, the sawtooth processing technology of the parameter is convenient to operate, the strength of the sawtooth processing technology can be ensured, the tin climbing effect in the welding process is further improved, and meanwhile, the tin paste cavity in the welding process is reduced.
Embodiment III:
this embodiment is a further illustration of an alloy post according to embodiment one, which is suitable for use in flexible COB display screens.
The material of the alloy column in the embodiment comprises a magnetic material, wherein the magnetic material is iron, and nickel is plated on the surface of the iron.
Specifically:
the material can completely realize the magnetic attraction mode of the flexible screen during assembly, hard damage in the assembly process is avoided, flatness after boxing is not affected, and surface consistency is high.
Embodiment four:
the present embodiment will be described with reference to fig. 4, 5, and 6.
The alloy column assembly suitable for the flexible COB display screen of this embodiment includes an alloy column and a nut, the alloy column is one suitable for the flexible COB display screen of any one of the first to third embodiments, and the nut is connected with the external thread of the fourth cylinder 4 of the alloy column.
Specifically:
as shown in fig. 4:
the nut is a cylinder or a polygon prism, and the internal thread of the nut is matched with the external thread of the fourth cylinder.
As shown in fig. 5 and 6:
the height of the nut is 1-3 mm;
the outer diameter D of the nut 6 8-10mm；
The outer diameter D of the nut 6 Diameter D of the third cylinder 3 3 ；
The nut comprises a magnetic material, wherein the magnetic material is iron, and nickel is plated on the surface of the iron;
the alloy column and the nut are both made of nickel plating technology.
Claims (10)
1. Alloy post suitable for flexible COB display screen, it includes first cylinder (1), second cylinder (2) and third cylinder (3), its characterized in that, alloy post still includes: the diameter of the second cylinder (2), the diameter of the third cylinder (3), the diameter of the fourth cylinder (4) and the diameter of the first cylinder (1) are sequentially reduced, the diameters of the first cylinder (1), the diameters of the second cylinder (2), the diameters of the third cylinder (3) and the diameters of the fourth cylinder (4) are coaxial, and the diameters of the first cylinder, the second cylinder, the third cylinder and the diameters of the fourth cylinder are sequentially connected end to form an integrated structure, and the diameters of the fourth cylinder (4) are provided with external threads.
2. The alloy post for a flexible COB panel of claim 1 wherein the material of the alloy post comprises a magnetic material.
3. The alloy post for a flexible COB panel of claim 2 wherein the magnetic material is iron and the iron surface is nickel plated.
4. Alloy column suitable for flexible COB display as claimed in claim 1, characterized in that the ratio of the diameters of the third cylinder (3) to the fourth cylinder (4) is 1.1-1.2.
5. Alloy column suitable for flexible COB display screens according to claim 1, characterized in that the height of the first cylinder (1) is 0.4-1mm.
6. Alloy column suitable for flexible COB display as claimed in claim 1, characterized in that the height of the third cylinder (3) is 1-1.5mm.
7. Alloy column suitable for flexible COB display as claimed in claim 1, characterized in that the height of the fourth cylinder (4) is 2-3mm.
8. Alloy column suitable for flexible COB display as claimed in claim 1, characterized in that the height of the second cylinder (2) is 0.5-1mm.
9. Alloy column suitable for flexible COB display screen according to claim 8, characterized in that the outer side of the second cylinder (2) is provided with several serrations whose lateral section is a right trapezoid, the upper base (h 21 ) And the lower bottom (h) 2 ) The ratio of (2) is 0.3-0.5.
10. An alloy column assembly suitable for a flexible COB display screen, comprising an alloy column and a nut, characterized in that said alloy column is an alloy column suitable for a flexible COB display screen as claimed in any one of claims 1 to 9, said nut being in threaded connection with a fourth cylinder (4) of said alloy column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322172412.0U CN220709885U (en) | 2023-08-14 | 2023-08-14 | Alloy column and alloy column assembly suitable for flexible COB display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322172412.0U CN220709885U (en) | 2023-08-14 | 2023-08-14 | Alloy column and alloy column assembly suitable for flexible COB display screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220709885U true CN220709885U (en) | 2024-04-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322172412.0U Active CN220709885U (en) | 2023-08-14 | 2023-08-14 | Alloy column and alloy column assembly suitable for flexible COB display screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220709885U (en) |
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2023
- 2023-08-14 CN CN202322172412.0U patent/CN220709885U/en active Active
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