CN101448358A - Design of bending region structure of flexible printed circuit board - Google Patents
Design of bending region structure of flexible printed circuit board Download PDFInfo
- Publication number
- CN101448358A CN101448358A CNA2007101681908A CN200710168190A CN101448358A CN 101448358 A CN101448358 A CN 101448358A CN A2007101681908 A CNA2007101681908 A CN A2007101681908A CN 200710168190 A CN200710168190 A CN 200710168190A CN 101448358 A CN101448358 A CN 101448358A
- Authority
- CN
- China
- Prior art keywords
- printed circuit
- circuit board
- flexible printed
- bending region
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005452 bending Methods 0.000 title claims abstract description 69
- 239000000758 substrate Substances 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Landscapes
- Structure Of Printed Boards (AREA)
Abstract
The invention relates to a design of a bending region structure of a flexible printed circuit board, the flexible printed circuit board comprises a substrate, at least one printed circuit and a bending region, the bending region is staggered with at least one printed circuit, at least one groove is formed at the bending region of the printed circuit, the thickness of the groove is less than or equal to the thickness of the printed circuit, and the groove can not cut off the printed circuit; the design of the groove can effectively control the stress position at the bending region of the flexible printed circuit board, thereby achieving the purpose of precise bending angle of the flexible printed circuit board.
Description
Technical Field
The present invention relates to a flexible printed circuit board structure design, and more particularly, to a structure design for forming a bending stress line by forming a groove in a bending region of a flexible printed circuit board.
Background
The main characteristic and advantage of the Flexible Printed Circuit (FPC) is easy to bend and flexible, so the FPC is often applied to a design structure that needs to be bent during assembly, and it is very important whether the position of the bent portion is accurate during bending.
Referring to fig. 1 and 2, in the prior art, a white paint line 11 is generally added at a position where a flexible printed circuit board 10 needs to be bent so that an operator can recognize the bent position. However, in the conventional bending method, due to the printing tolerance of the white paint line 11 and the tolerance caused by manual bending by the operator, the angle of the flexible printed circuit board 10 cannot be completely accurate during bending.
In addition, in order to improve the above-mentioned drawback that the bending precision is difficult to control, some manufacturers have partially hollowed out the bending region of the flexible printed circuit board. However, the method must damage the flexible printed circuit board, so that the strength of the flexible printed circuit board is reduced, and even the flexible printed circuit board is broken.
Disclosure of Invention
In view of the disadvantages of the prior art, the present invention is directed to a flexible printed circuit board bending region structure design, which is a special stress line design for a printed circuit of the flexible printed circuit board to control the position of stress generation when the flexible printed circuit board is bent, so as to achieve the effect of precise bending angle.
In order to achieve the above object, the present invention provides a structure design of a flexible printed circuit board bending region, the flexible printed circuit board has at least one printed circuit and a bending region, the bending region is interlaced with the at least one printed circuit, and at least one groove is formed in the bending region of the printed circuit, and the groove does not cut off the printed circuit; by the design of the grooves, the stress position can be effectively controlled in the bending area of the flexible printed circuit board.
For further understanding and appreciation of the structural objects and functions of the present invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a conventional FPC structure.
FIG. 2 is a schematic view of a conventional FPC after bending.
Fig. 3 is a schematic structural diagram of an embodiment of the present invention.
Fig. 4 is a schematic view of a bent and enlarged partial structure of the present invention.
Fig. 5 is a schematic structural view of the embodiment of fig. 3 after bending.
Fig. 6 to 11 are schematic structural diagrams of different embodiments of the present invention.
Description of the main Components
One, the prior art:
10-flexible printed circuit board
11-white paint line
Secondly, the invention:
2. 12, 22, 32, 42, 52, 62-flexible printed circuit board
20. 120, 220, 320, 420, 520, 620-substrate
21. 121, 221, 321, 421, 521, 621, 22, 122, 222, 322, 422, 522, 622 printed circuit
1211-wide area
23. 123, 223, 323, 423, 523, 623-bending zone
24. 124, 224, 324, 424, 524a, 524b, 624a, 624 b-grooves
g-clearance between two opposite surfaces of the flexible printed circuit board after bending
Length of L-groove
thickness of t-flexible printed circuit board
Width of W-groove
Width of W1 printed Circuit
Theta-angle of bending
Pi-circumference ratio
Detailed Description
The technical means and functions of the present invention for achieving the purpose will be described below with reference to the attached drawings, and the embodiments listed in the following drawings are only for assisting understanding, but the technical means of the present invention is not limited to the listed drawings.
Referring to fig. 3, in an embodiment of the present invention, the flexible printed circuit board 2 has a substrate 20, at least one printed circuit and a bending region 23, for example, two printed circuits 21 and 22 are provided on the drawing, the bending region 23 is staggered with the printed circuits 21 and 22, and the bending region 23 and the substrate 20 usually form a 45-degree bending angle θ; by etching, a groove 24 is formed in the bending region 23 of the printed circuit 21.
Since the recess 24 completely etches the printed circuit 21, the depth of the recess 24 must be less than or equal to the thickness of the printed circuit 21; as for the length L of the groove 24, it is not limited to completely cut off the printed circuit 21, as shown in the present embodiment, the width W1 of the printed circuit 21 with the groove 24 is increased, so that the length L of the groove 24 can cover most of the area of the flexible printed circuit board 2, and the printed circuit 21 can still maintain the circuit connection state; further, referring to fig. 4, the width W of the groove 24 is designed according to the following formula:
W≧(g/2+t)*π；
wherein W is the width of the groove 24; g is a gap between two opposite surfaces of the flexible printed circuit board 2 after the flexible printed circuit board is bent; t is the thickness of the flexible printed circuit board 2; and pi is the circumferential ratio.
The closer the width W is to (g/2+ t) × pi, the more precise the bending angle will be.
By the above-mentioned dimension design of the groove 24, such as depth, length L, width W, etc., as shown in fig. 5, the stress position can be effectively controlled in the bending region 23 of the flexible printed circuit board 2, so as to achieve the purpose of precise bending angle of the flexible printed circuit board 2.
Referring to the embodiment shown in fig. 6, which is based on the embodiment shown in fig. 3, the flexible printed circuit board 12 has a substrate 120, two printed circuits 121, 122 and a bending region 123, the printed circuit 121 has a wide region 1211 with a width W1, the wide region 1211 covers the bending region 123 and can be used to provide a groove 124, the embodiment is characterized in that the width of the two ends of the wide region 1211 away from the bending region 123 is gradually reduced to be equal to the width of the other printed circuit 122; the tapered portion 1212 should be spaced apart from the inflection region 123 to avoid forming another stress line in the tapered portion 1212.
Please refer to fig. 7 to 11 for structural diagrams of other embodiments of the present invention.
As shown in fig. 7, the flexible printed circuit board 22 has a substrate 220, a wider printed circuit 221, a narrower printed circuit 222 and a bending region 223, and a groove 224 is disposed at the bending region 223 of the printed circuit 221, wherein the groove 224 is disposed at an edge of the printed circuit 221 close to the printed circuit 222.
As shown in fig. 8, the flexible printed circuit board 32 has a substrate 320, a wider printed circuit 321, a narrower printed circuit 322, and a bending region 323, and a groove 324 is disposed at the bending region 323 of the printed circuit 321, wherein the groove 324 is disposed at about the center of the printed circuit 321 and does not penetrate through two side edges of the printed circuit 321.
As shown in fig. 9, the flexible printed circuit board 42 has a substrate 420, a wider printed circuit 421, a narrower printed circuit 422 and a bending region 423, and the present embodiment is characterized in that the bending region 423 of the printed circuit 421 is provided with a plurality of grooves 424, and the shape of the grooves 424 is not limited to the circular shape shown in the figure, and can be any geometric combination.
As shown in fig. 10, the flexible printed circuit board 52 has a substrate 520, two printed circuits 521 and 522 with the same width, and a bending region 523, and the present embodiment is characterized in that a groove 524a and a groove 524b are respectively disposed at the bending region 523 of the printed circuits 521 and 522, and the groove 524a and the groove 524b are respectively disposed at the edges of the printed circuits 521 and 522 away from each other.
As shown in fig. 11, the flexible printed circuit board 62 has a substrate 620, two printed circuits 621 and 622 with the same width, and a bending region 623. this embodiment is based on the embodiment of fig. 10, and a groove 624a and 624b are respectively disposed at the bending region 623 of the printed circuits 621 and 622, and this embodiment is characterized in that the groove 624a and 624b are disposed at the edge adjacent to the printed circuits 621 and 622.
In summary, the structural design of the bending region of the flexible printed circuit board provided by the present invention is characterized in that the bending region of the printed circuit board forms a groove stress line, which can effectively control the stress position in the bending region of the flexible printed circuit board, thereby achieving the purpose of precise bending angle of the flexible printed circuit board; it should be noted that the shape, number and position of the grooves are not limited to the above embodiments, and the design emphasis is to reduce the thickness of the bending region of the printed circuit or to completely etch the bending region without cutting the printed circuit.
The above description is only an example of the present invention, and the scope of the present invention should not be limited thereto. Therefore, all the equivalent changes and modifications made according to the claims of the present invention should fall within the scope of the present invention.
Claims (10)
1. A flexible printed circuit board bending region structure design is characterized by comprising:
a flexible printed circuit board, which has at least one printed circuit and a bending area, and the bending area is interlaced with the at least one printed circuit;
at least one groove, which is arranged on the printed circuit and is positioned in the bending area.
2. The flexible printed circuit board bending region structural design of claim 1, wherein: the depth of the groove is less than or equal to the thickness of the printed circuit, so that at least one notch is formed on the printed circuit.
3. The flexible printed circuit board bending region structural design of claim 2, wherein: the notch of the printed circuit does not cut the printed circuit.
4. The flexible printed circuit board bending region structural design of claim 3, wherein: a plurality of notches are provided, and the total length of the plurality of notches does not cut off the printed circuit.
5. The flexible printed circuit board bending region structural design of claim 1, wherein: the design of the groove is according to the following formula:
w ≧ (g/2+ t) · π; wherein,
w is the width of the groove;
g is the gap between the two opposite surfaces of the flexible printed circuit board after the flexible printed circuit board is bent;
t is the thickness of the flexible printed circuit board;
and pi is the circumferential ratio.
6. The flexible printed circuit board bending region structural design of claim 1, wherein: the flexible printed circuit board is provided with two printed circuits, one printed circuit is provided with a wide area, and the wide area covers the bending area and is provided with a groove.
7. The flexible printed circuit board bending region structural design of claim 6, wherein: the groove is arranged at the edge of the printed circuit with wider width.
8. The flexible printed circuit board bending region structural design of claim 6, wherein: the groove is arranged at the approximate center of the printed circuit with wider width and does not penetrate through the two side edges of the printed circuit.
9. The flexible printed circuit board bending region structural design of claim 1, wherein: the shape of the groove can be circular or any combination of geometric shapes.
10. The flexible printed circuit board bending region structural design of claim 1, wherein: the two printed circuits have the same width and are provided with at least one groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101681908A CN101448358B (en) | 2007-11-28 | 2007-11-28 | Bending region structure of flexible printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101681908A CN101448358B (en) | 2007-11-28 | 2007-11-28 | Bending region structure of flexible printed circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101448358A true CN101448358A (en) | 2009-06-03 |
| CN101448358B CN101448358B (en) | 2011-07-20 |
Family
ID=40743660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101681908A Expired - Fee Related CN101448358B (en) | 2007-11-28 | 2007-11-28 | Bending region structure of flexible printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101448358B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104378911A (en) * | 2014-11-26 | 2015-02-25 | 河源中光电通讯技术有限公司 | Improved flexible circuit board of mobile phone display screen |
| CN105578721A (en) * | 2015-12-29 | 2016-05-11 | 广东欧珀移动通信有限公司 | Flexible circuit board and mobile terminal |
| CN107432080A (en) * | 2015-03-16 | 2017-12-01 | 日本梅克特隆株式会社 | Flexibility printed circuit board |
| CN107919061A (en) * | 2016-10-05 | 2018-04-17 | 三星显示有限公司 | Display device |
-
2007
- 2007-11-28 CN CN2007101681908A patent/CN101448358B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104378911A (en) * | 2014-11-26 | 2015-02-25 | 河源中光电通讯技术有限公司 | Improved flexible circuit board of mobile phone display screen |
| CN107432080A (en) * | 2015-03-16 | 2017-12-01 | 日本梅克特隆株式会社 | Flexibility printed circuit board |
| CN107432080B (en) * | 2015-03-16 | 2018-10-02 | 日本梅克特隆株式会社 | Flexibility printed circuit board |
| CN105578721A (en) * | 2015-12-29 | 2016-05-11 | 广东欧珀移动通信有限公司 | Flexible circuit board and mobile terminal |
| CN107919061A (en) * | 2016-10-05 | 2018-04-17 | 三星显示有限公司 | Display device |
| CN107919061B (en) * | 2016-10-05 | 2021-11-09 | 三星显示有限公司 | Display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101448358B (en) | 2011-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8058560B2 (en) | Bendable area design for flexible printed circuitboard | |
| JP4802959B2 (en) | connector | |
| US7147480B2 (en) | Connecting structure of flexible printed circuit board to printed circuit board | |
| US9093780B2 (en) | Press-fit pin, connection structure including the press-fit pin, and electronic device including the press-fit pin | |
| CN101448358B (en) | Bending region structure of flexible printed circuit board | |
| JP6349346B2 (en) | Contact and connector using the contact | |
| CN102665371A (en) | Rigid/Flexible Circuit Board | |
| JP6462634B2 (en) | connector | |
| JP6167294B2 (en) | Coil parts | |
| JP2005235410A (en) | Terminal for connecting substrate | |
| US6814592B1 (en) | Short contact element between housing parts | |
| EP3419392A1 (en) | Device and led module for bending board | |
| CN110718780A (en) | Press-fit terminal and substrate assembly | |
| JP2020068093A (en) | Connector and method for manufacturing connector | |
| US9583858B2 (en) | Connector terminal and connector | |
| JP2006210230A (en) | Press-fit terminal, its fixing method, and method of manufacturing circuit board device using press-fit terminal | |
| JPH01289190A (en) | Terminal structure of printed board connection | |
| JP5286513B2 (en) | Flexible flat cable and flexible printed circuit board | |
| US20160079715A1 (en) | Terminal fitting and its manufacturing method, and connector using the terminal fitting | |
| JP5067978B2 (en) | Connection member and method of manufacturing connection member | |
| JP4832557B2 (en) | Contact structure of electrical connector | |
| JP4849690B2 (en) | connector | |
| JP2021002475A (en) | connector | |
| KR101697934B1 (en) | Connector pin for PCB | |
| CN108758317B (en) | Plate member |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110720 Termination date: 20141128 |
|
| EXPY | Termination of patent right or utility model |