CN209964370U - Can improve flexible circuit board structure and composing structure of die-cut burr - Google Patents
Can improve flexible circuit board structure and composing structure of die-cut burr Download PDFInfo
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- CN209964370U CN209964370U CN201920519394.XU CN201920519394U CN209964370U CN 209964370 U CN209964370 U CN 209964370U CN 201920519394 U CN201920519394 U CN 201920519394U CN 209964370 U CN209964370 U CN 209964370U
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- circuit board
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- 239000002699 waste material Substances 0.000 claims abstract description 30
- 230000002787 reinforcement Effects 0.000 claims abstract description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 80
- 238000004080 punching Methods 0.000 claims description 42
- 238000007493 shaping process Methods 0.000 abstract description 4
- 230000006978 adaptation Effects 0.000 abstract description 2
- 238000005520 cutting process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Abstract
The utility model discloses a can improve flexible circuit board and composing structure of die-cut burr relates to the flexible circuit board field of making, including the circuit board main part and the stiffening plate of locating circuit board main part reinforcement region one side, the edge of stiffening plate extends outside the regional appearance profile of circuit board main part reinforcement, be equipped with the die-cut window of fretwork on the stiffening plate, die-cut window and the regional interval certain distance of circuit board main part reinforcement to the shape of die-cut window and the shape looks adaptation of the regional appearance profile of circuit board main part reinforcement. The utility model discloses a form die-cut window in advance on the stiffening plate, get rid of partial waste material, make the waste material region between die-cut window and the circuit board main part edge diminish, carry out die-cut shaping to this flexible circuit board again, produced concentrated deformability is down obtained the release when die-cut this waste material region time, consequently can not produce the burr in reinforcement position department, to the improvement of burr problem when having guaranteed die-cut flexible circuit board from the source.
Description
Technical Field
The utility model relates to a flexible circuit board makes the field, especially relates to a can improve flexible circuit board structure and composing structure of die-cut burr.
Background
A flexible printed circuit board (FPC) is widely used in electronic products, which is a highly reliable flexible printed circuit board made of polyimide or polyester film as a base material, and has characteristics of high wiring density, light weight, thin thickness, and good bending property. Since the FPC has low mechanical strength and is easily cracked, a reinforcing material needs to be attached to reinforce the strength of the FPC. The FPC reinforcing sheet is made of steel sheets, PET, FR4, PI, aluminum foil and the like, is used for solving the flexibility characteristic of FPC, improves the strength of a splicing part and facilitates the integral assembly of products.
Regarding the punching and forming of the FPC, the prior art is that the FPC is not further refined and processed when being subjected to the whole edition, the appearance of the FPC is directly punched, burrs are easily generated at the edge of a reinforcing area in the process of punching the FPC, the burrs are difficult to clean up, and a circuit board is easily short-circuited or broken, so that the problems of poor appearance and poor quality can be brought, and even products are scrapped.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can improve flexible circuit board structure of die-cut burr to produce the burr in reinforcement position department easily when solving the die-cut flexible circuit board of prior art, lead to the bad problem of product.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a flexible circuit board structure capable of improving punching burrs comprises a circuit board main body and a reinforcing plate arranged on one side of a reinforcing area of the circuit board main body, wherein the edge of the reinforcing plate extends out of the outline of the reinforcing area of the circuit board main body, a hollow punching window is arranged on the reinforcing plate, the punching window and the reinforcing area of the circuit board main body are separated by a certain distance, and the shape of the punching window is matched with the shape of the outline of the reinforcing area of the circuit board main body; the waste material region between window and the circuit board main part reinforcement region is cut on the stiffening plate is stress concentration district, and this stress concentration district's deformability is toward die-cut window release when die-cut circuit board main part appearance to avoid producing the burr.
Further, the die-cut window is U-shaped.
Furthermore, the punching window is in a linear slit shape, a U-shaped window shape or a row of holes connected in front and back.
Further, the distance between the die-cut window and the outline of the reinforcing area of the circuit board main body is not less than 0.2 mm.
Furthermore, the reinforcing area of the circuit board main body and the reinforcing plate are rectangular, three sides of the reinforcing plate are positioned outside the outline of the reinforcing area of the circuit board main body, and the interval between the three sides and the outline of the corresponding reinforcing area of the circuit board main body is not less than 2 mm.
Compared with the prior art, the utility model has the advantages of it is following:
the utility model provides a pair of can improve flexible circuit board structure of die-cut burr through the die-cut window of preforming on the stiffening plate, gets rid of partial waste material earlier, makes the waste material region between die-cut window and the circuit board main part edge diminish, and this waste material region is outer to have abundant peripheral space, carries out die-cut shaping to this flexible circuit board again, and produced concentrated deformability when die-cut this waste material region obtains the release toward die-cut window, consequently can not produce the burr. The flexible circuit board is reasonable and reliable in structure, and high in universality and practicability.
The utility model also provides a composing structure of flexible circuit board, which comprises a plate body, interval arrangement has a plurality of as above-mentioned arbitrary one on the plate body the flexible circuit board structure that can improve die-cut burr, be equipped with the die-cut window of fretwork on the plate body, die-cut window one-to-one and overlapping on die-cut window on the plate body and the stiffening plate.
Furthermore, the shape of the punching window on the plate body comprises one or more than two of a linear slit shape, a U-shaped window shape or a front and back connected row hole shape.
Compared with the prior art, the utility model provides a pair of flexible circuit board's composing structure all is equipped with the die-cut window with the shape looks adaptation of the regional appearance profile of circuit board main part reinforcement on plate body and stiffening plate, all does not produce the burr on circuit board main part and stiffening plate during die-cut flexible circuit board, to the improvement of burr problem when having guaranteed die-cut flexible circuit board from the source, has avoided the bad problem of outward appearance that probably takes place.
Drawings
FIG. 1 is a structural view of a flexible circuit board capable of improving punching burrs according to the present embodiment;
FIG. 2 is a schematic structural view of a circuit board main body and a reinforcing plate;
FIG. 3 is a schematic view of a flexible circuit board with burrs after die cutting is complete;
FIG. 4 is a flexible circuit board structure having a die cut window in the shape of a U-shaped fenestration;
FIG. 5 is a flexible circuit board structure having die cut windows in the form of linear slits;
FIG. 6 is a flexible circuit board structure having punched windows in the form of rows of holes that are aligned in a front-to-back relationship;
FIG. 7 illustrates the drill path for making a circular row of holes that are joined in tandem;
FIG. 8 is a schematic diagram of the layout structure of a flexible printed circuit board without a punching window;
fig. 9 shows the position of burrs generated when fig. 8 is directly punched out of the outer shape of the flexible circuit board;
fig. 10 is a schematic structural view of the reinforcing plate and the plate body in fig. 8 after a U-shaped window-shaped die-cut window is formed therein;
FIG. 11 is a schematic view of the reinforcing plate and the plate body of FIG. 8 after forming a die-cut window in the shape of a linear slit;
fig. 12 is a schematic structural view of the reinforcing plate and the plate body in fig. 8 after punching windows in a row of holes connected in front and back are formed;
FIG. 13 is an enlarged view at A in FIG. 12;
FIG. 14 is a schematic view of the slug shapes formed when blanking the flexible circuit board outline in the imposition structure shown in FIGS. 10 and 11;
FIG. 15 is an enlarged view at B in FIG. 14;
FIG. 16 is a schematic view of the slug shapes formed when blanking the flexible circuit board outline in the imposition structure shown in FIG. 12;
fig. 17 is an enlarged view at C in fig. 16.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings and specific embodiments.
Fig. 2 is a schematic structural diagram of the circuit board main body 1 and the reinforcing plate 2 of the flexible circuit board of the present embodiment, and when the outer shape of the flexible circuit board is directly punched according to the prior art, burrs 5 are easily generated at the positions shown in fig. 3.
Please refer to fig. 1 to 3, the present invention provides a flexible circuit board structure capable of improving the punching burr 5, which comprises a circuit board main body 1 and a reinforcing plate 2 disposed at one side of a reinforcing region 4 of the circuit board main body 1, wherein the edge of the reinforcing plate 2 extends to the outside of the outline of the reinforcing region 4 of the circuit board main body 1, a hollow punching window 3 is disposed at the position of the reinforcing plate 2 outside the outline of the reinforcing region 4 of the circuit board main body 1, the punching window 3 has a certain distance with the outline of the reinforcing region 4 of the circuit board main body 1, and the shape of the punching window 3 is adapted to the shape of the outline of the reinforcing region 4 of the circuit board main body 1. The waste material region between window and the circuit board main part reinforcement region is cut on the stiffening plate is stress concentration district, and this stress concentration district's deformability is toward die-cut window release when die-cut circuit board main part appearance, and then avoids producing burr 5.
The reinforcing plate 2 mainly comprises a stainless steel reinforcing plate, an aluminum foil reinforcing plate, a polyester reinforcing plate, a polyimide reinforcing plate, a glass fiber reinforcing plate, a polytetrafluoroethylene reinforcing plate, a polycarbonate reinforcing plate and the like, and is used for solving the flexibility characteristic of FPC (flexible printed circuit), improving the strength of a reinforcing area 4 and facilitating the overall assembly of products.
In this embodiment, through forming die-cut window 3 in advance on stiffening plate 2, get rid of partial waste material earlier, make the waste material region between die-cut window 3 and the 1 edge of circuit board main part diminish, there is abundant peripheral space outside the waste material region, carry out die-cut shaping to this flexible circuit board again, produced concentrated deformability when die-cutting this waste material region obtains the release toward die-cut window 3, consequently, burr 5 does not produce during the die-cut stiffening plate, the improvement to burr 5 problem when having guaranteed die-cut flexible circuit board from the source, the bad problem of outward appearance that has avoided probably taking place.
As shown in fig. 1 to 4, the reinforcing region 4 of the circuit board main body 1 of the present embodiment is rectangular, and therefore, in the present embodiment, the reinforcing plate 2 is adaptively configured into a rectangular structure, and three sides of the reinforcing plate 2 are located outside the outline of the reinforcing region 4 of the circuit board main body 1. The portion of the reinforcing plate 2 located outside the reinforcing region 4 of the circuit board body 1 is a scrap region to be cut off, and the die-cut window 3 is opened in the scrap region.
The distance between the die-cut window 3 and the outline of the reinforcing area 4 of the circuit board main body 1 is not less than 0.2mm, so that the residual reinforcing plate waste can be die-cut smoothly after the die-cut window 3 is opened. This spacing is preferably 0.2mm in this embodiment, i.e. L in fig. 4 to 7 is 0.2 mm. The space between the three sides of the reinforcing plate 2 outside the outline of the reinforcing area 4 of the circuit board body 1 and the outline of the corresponding reinforcing area 4 is not less than 2mm, and if the space is too large, the material of the reinforcing plate 2 is wasted, and if the space is too small, the die-cut window 3 is difficult to be formed in the waste area of the reinforcing plate 2, and in the embodiment, the space is preferably 2 mm.
The shape of the blanking window 3 is preferably U-shaped so as to fit the outline of the reinforcing area 4 of the circuit board main body 1. Further, in the present embodiment, as shown in fig. 4 to 6, the punching window 3 is in a linear slit shape, a U-shaped window shape, or a row of holes connected in front and rear. Three processes for forming the blanking window 3 will be briefly described below.
For the structure of the die-cut window 3 in the shape of linear slit as shown in fig. 5, in the region where the reinforcing plate 2 is attached, the waste material portion of the reinforcing plate 2 outside the circuit board main body is subjected to the slitting process using a cutting die, the waste material of the reinforcing plate is firstly slit at the position 0.2mm away from the appearance of the circuit board main body 1, and attention is paid to avoid the die-cutting on the circuit board main body 1, thereby obtaining a unique flexible circuit board structure having the die-cut window in the shape of linear slit.
In the structure of the U-shaped window 3 shown in fig. 4, the scrap of the reinforcing plate 2 other than the circuit board body is punched out by using a steel die in the area where the reinforcing plate 2 is attached, and the scrap is punched out at a position 0.2mm from the outer shape of the circuit board body 1, and the circuit board body 1 is not punched out. This results in a unique FPC structure with a die cut window in the shape of a U-shaped window.
In the punching window 3 structure of the row-hole shape in which the front and rear are connected as shown in fig. 6, the reinforcing region 4 is attached, the scrap part of the reinforcing plate 2 is drilled by using the drilling machine, and the scrap is first drilled at a position 0.2mm away from the outer shape of the circuit board main body 1, and the scrap is not drilled on the circuit board main body 1. Thus, a unique FPC structure of punching windows in a row of holes which are connected in front and back is obtained. The drill bit path to make the circular rows of holes next to each other is shown in fig. 7.
It is understood that the shape of the reinforcing plate 2 is related to the shape of the reinforcing region 4 of the circuit board body 1, but is not limited to a rectangle, as long as the reinforcing plate 2 can cover the reinforcing region 4 of the circuit board body 1 and has enough space to open the die-cut window 3.
The flexible circuit board structure that can improve die-cut burr 5 that this embodiment provided, through set up die-cut window 3 on stiffening plate 2, make the regional 4 outlying stiffening plate 2 waste material regions of reinforcement of circuit board main part 1 diminish, get rid of the waste material through opening the window of U-shaped earlier, or the waste material is got rid of in advance drilling earlier, or the waste material is got rid of in advance the seam, carry out FPC die-cut shaping again at last, make the waste material diminish, the waste material only exists in the region within 0.2mm apart from 1 appearance of circuit board main part, and the region beyond 0.2mm apart from 1 appearance of circuit board main part is unsettled, there is abundant peripheral space, when die-cutting FPC, very concentrated deformability obtains the release toward die-cut window, avoid producing like the burr shown in figure 3 bad.
As shown in fig. 8 to 13, the present embodiment further provides a typesetting structure of a flexible circuit board, including a board body 6, a plurality of the above-mentioned flexible circuit board structures capable of improving the punching burr 5 are arranged on the board body 6 at intervals, the board body 6 is provided with the hollow punching windows 3, and the punching windows 3 on the board body 6 are in one-to-one correspondence with the punching windows 3 on the reinforcing plate 2 and are overlapped.
The circuit board main body is formed by punching a board body. Preferably, five flexible circuit board structures are provided on the board body 6, and accordingly, the number of the punching windows 3 is also five. The die-cut window 3 of the plate body 6 is in a linear slit shape as shown in fig. 11, a U-shaped window shape as shown in fig. 10, or a row of holes which are connected in front and rear as shown in fig. 12, and two or more of the three shapes may be included in the plate body 6.
The typesetting structure of the flexible circuit board is characterized in that: the waste materials are removed through pre-opening the U-shaped window, or pre-drilling the hole to remove the waste materials, or pre-cutting the seam to remove the waste materials, so that a punching window 3 matched with the shape of the outline of the reinforcing area of the circuit board main body is formed on the board body 6 and the reinforcing plate 2, the waste materials between the punching window 3 and the circuit board main body 1 are shown in figures 14 to 17, the waste materials are reduced, finally, FPC (flexible printed circuit) is punched and formed, the stress of the waste materials is released towards the punching window 3 during punching, burrs 5 are prevented from being generated on the reinforcing plate 2 or the board body 6, the improvement of the burrs 5 during punching of FPC is ensured from the source, and the problem of poor appearance which can occur is avoided. The flexible circuit board is reasonable and reliable in typesetting structure, rich in innovation, high in universality and practicability, and improves product quality and FPC reliability in the application process. The scheme is applied to production in batches and achieves good effect.
The above description is only an embodiment utilizing the technical content of the present disclosure, and any modification and variation made by those skilled in the art can be covered by the claims of the present disclosure, and not limited to the embodiments disclosed.
Claims (7)
1. The utility model provides a can improve flexible circuit board structure of die-cut burr which characterized in that: the circuit board comprises a circuit board main body and a reinforcing plate arranged on one side of a reinforcing area of the circuit board main body, wherein the edge of the reinforcing plate extends out of the outline of the reinforcing area of the circuit board main body, a hollow punching window is arranged on the reinforcing plate, the punching window and the reinforcing area of the circuit board main body are separated by a certain distance, and the shape of the punching window is matched with the shape of the outline of the reinforcing area of the circuit board main body; the waste material region between window and the circuit board main part reinforcement region is cut on the stiffening plate is stress concentration district, and this stress concentration district's deformability is toward die-cut window release when die-cut circuit board main part appearance to avoid producing the burr.
2. A flexible circuit board structure capable of improving the punching burr according to claim 1, wherein: the die-cut window is U-shaped.
3. A flexible circuit board structure capable of improving the punching burr according to claim 2, wherein: the punching window is in a linear slit shape, a U-shaped window opening shape or a row of holes connected in front and back.
4. A flexible circuit board structure capable of improving the punching burr according to claim 1, wherein: the distance between the die-cut window and the outline of the reinforcing area of the circuit board main body is not less than 0.2 mm.
5. A flexible circuit board structure capable of improving the punching burr according to claim 1, wherein: the reinforcing area of the circuit board main body and the reinforcing plate are rectangular, three sides of the reinforcing plate are positioned outside the outline of the reinforcing area of the circuit board main body, and the interval between the three sides and the outline of the corresponding reinforcing area of the circuit board main body is not less than 2 mm.
6. The utility model provides a composing structure of flexible circuit board which characterized in that: the flexible circuit board structure capable of improving the punching burrs comprises a board body, wherein a plurality of flexible circuit board structures as claimed in any one of claims 1, 2, 4 and 5 are arranged on the board body at intervals, hollow punching windows are arranged on the board body, and the punching windows on the board body correspond to and are overlapped with the punching windows on the reinforcing plate in a one-to-one mode.
7. The composition structure of the flexible circuit board according to claim 6, wherein: the shape of the punching window on the plate body comprises one or more than two of a linear slit shape, a U-shaped windowing shape or a row-hole shape connected in front and back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920519394.XU CN209964370U (en) | 2019-04-17 | 2019-04-17 | Can improve flexible circuit board structure and composing structure of die-cut burr |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920519394.XU CN209964370U (en) | 2019-04-17 | 2019-04-17 | Can improve flexible circuit board structure and composing structure of die-cut burr |
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| Publication Number | Publication Date |
|---|---|
| CN209964370U true CN209964370U (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920519394.XU Expired - Fee Related CN209964370U (en) | 2019-04-17 | 2019-04-17 | Can improve flexible circuit board structure and composing structure of die-cut burr |
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| Country | Link |
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| CN (1) | CN209964370U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112060200A (en) * | 2020-08-27 | 2020-12-11 | 韶关市华思迅飞信息科技有限公司 | Flexible circuit board structure and punching device thereof |
| CN113079643A (en) * | 2021-03-10 | 2021-07-06 | 福莱盈电子股份有限公司 | Method for manufacturing local reinforced flexible circuit board |
-
2019
- 2019-04-17 CN CN201920519394.XU patent/CN209964370U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112060200A (en) * | 2020-08-27 | 2020-12-11 | 韶关市华思迅飞信息科技有限公司 | Flexible circuit board structure and punching device thereof |
| CN113079643A (en) * | 2021-03-10 | 2021-07-06 | 福莱盈电子股份有限公司 | Method for manufacturing local reinforced flexible circuit board |
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Granted publication date: 20200117 |