CN203265714U - Fishtail-type drill pin used for circuit board - Google Patents
Fishtail-type drill pin used for circuit board Download PDFInfo
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- CN203265714U CN203265714U CN 201320299309 CN201320299309U CN203265714U CN 203265714 U CN203265714 U CN 203265714U CN 201320299309 CN201320299309 CN 201320299309 CN 201320299309 U CN201320299309 U CN 201320299309U CN 203265714 U CN203265714 U CN 203265714U
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- drill
- circuit board
- cutting blade
- body part
- point
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- 238000005520 cutting process Methods 0.000 claims abstract description 81
- 241000251468 Actinopterygii Species 0.000 claims description 19
- 238000005553 drilling Methods 0.000 abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 13
- 239000011889 copper foil Substances 0.000 description 13
- 238000012797 qualification Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 230000008034 disappearance Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Drilling Tools (AREA)
Abstract
The utility model relates to a fishtail-type drill pin used for a circuit board. The fishtail-type drill pin comprises a drill body portion and a drill groove portion extending from the front end of the drill body portion. The front end of the drill groove portion is provided with two reversely-symmetrical cutting edges, the two cutting edges are in a relatively inclined shape so that a drill core is formed in a connection portion, a concave portion for allowing the drill core to be located at the bottom is formed in a center staggered portion, the two cutting edges are respectively provided with a first cutting edge face which is located on the outer edge of one side of the drill core, crosses the drill core from back to front, extends to the other side of the drill core and is in a sideward inclined shape, the two first cutting edge faces form an included angle of 179-120 degrees, the tail ends of the two first cutting edge faces extend backwards in a reversed and inclined mode to form second cutting edge faces, protruding drill point portions extending along a straight line are formed on the connection portions of the first cutting edge faces and the second cutting edge faces, the angle of each drill point portion ranges from 150 degrees to 179 degrees, the concave portion makes the drill core not be in contact with the circuit board, the contact area of the two drill point portions and the surface of the soft circuit board is increased, the distance between the drill point portions and the drill core is short, so that tension is reduced, shaking and deviation caused in drilling can be avoided, and the aim of improvement of the precision and the qualified rate is achieved.
Description
Technical field
The utility model relates to the fish tail type drill point that a kind of circuit board is used, the drill point of espespecially flexible circuit board being holed, the end face of two cutting blades of its drill point front end has the first cutting blade face and end is oppositely tiltedly stretched formation the second cutting blade face backwards, both apex point section's enlarge active surface of forming of junction and shorten with unbearable between distance reduce torsion, generation is rocked and is offset when avoiding holing.
Background technology
be under compact designer trends at electronic product now, make various electronic products become less for volume requirement, so the volume of each electronic component also need dwindle thereupon, therefore the manufacturing processing of the inner various electronic components of electronic product will become more and more meticulousr, and but the circuit board volume of electronic component group setting position in electronic product also must be dwindled thereupon, and electronic product is (as desktop computer, notebook computer, panel computer, digital still camera, mobile phone, display screen, or personal digital assistant (PDA) etc.) limited space in or because the design requirement of rotary part etc., be with, has distribution density high, lightweight, thin thickness, flexible circuit board (the Flexible Printed Circuit of the less or flexibility ratio advantages of higher of distribution spatial constraints, FPC) just used widely by manufacturer.
need to utilize drill point to carry out hole processing in the processing procedure of flexible circuit board, giving solid welding after allowing the plural pin of electronic component intert to form with flexible circuit board and is electrically connected again, but because electronic product is constantly towards compact research and development, so utilize the multi-layer soft circuit board of repeatedly plate mode moulding because effectively saving the space, so use the product of multi-layer soft circuit board just more and more, to utilize Copper Foil to form circuit in the flexible circuit board of general single or double, and the multi-layer soft circuit board need utilize bore mode allow between the multilayer copper foil circuit to form and is electrically connected, be with, the processing of flexible circuit board does not just break away from the processing job procedure that utilizes drill point to hole in processing.
moreover, see also shown in Figure 7, because traditional drill point A forms the unbearable A1 of convex shape in the center, so at unbearable A1 contact flexible circuit board B and allow after drill point A begins to rotate, the flexible circuit board B Copper Foil that just can produce unbearable A1 contact is torn and is turned up, after drill point A completes bore operation, just have inconsistent burr (Burr) around its hole, allow product become defective products, be with, utility model designer just develops the drill point of fish tail type, see also shown in Figure 8, it has utilized two cutting blade A2 that are convex shape in two sides, allow two cutting blade A2 centers be formed with recess A3, unbearable A1 just can be positioned at recess A3 to avoid touching flexible circuit board B, because cutting place of two cutting blade A2 ends is just the wall place of hole, just excision Copper Foil that can be certain is to avoid producing burr, above-mentioned situation is to add the situation in man-hour at the flexible circuit board to general single or double, but when the multi-layer soft circuit board is carried out Drilling operation, because it is many that its Copper Foil number of plies becomes, cause toughness to increase, so when two cutting blade A2 ends contact the multi-layer soft circuit board surfaces and rotate, two cutting blade A2 end is positioned at the unbearable A1 of distance farthest, two situations that cutting blade A2 end produces skew or rocks have been caused so torsion is large, just can allow the dimensional accuracy of hole reduce, cause product to become defective products, be with, how to solve problem and the disappearance of existing drill point, be the relevant manufacturer that is engaged in the industry and desire most ardently the direction place person that research improves.
Summary of the invention
Utility model designer is because above-mentioned problem and disappearance, be to collect related data, via in many ways assessing and considering, and to engage in the many years of experience of the industry accumulation, via constantly studying and revising, beginning is designed the fish tail type drill point that this kind circuit board is used, and solves two problems that the generation of cutting blade ends is offset or rocks that prior art exists.
For achieving the above object, the technical solution adopted in the utility model is:
The fish tail type drill point that a kind of circuit board is used, it comprises drill body part and the drill flute section of being extended by the drill body part front end, and drill flute section is provided with two cutting blades that are the reverse symmetry shape away from the front end of drill body part, it is characterized in that:
these two cutting blades are the relative tilt shape, and that the junction is formed is unbearable, and the center staggered place of allowing is formed with a recess, allow the unbearable bottom that is positioned at recess locate, two cutting blade end faces have to be positioned to cross forward after the outer cause of a unbearable side and unbearablely extend to opposite side and be the first cutting blade face that rolls shape, be formed with an angle between 179 °～120 ° between two the first cutting blade faces, two the first cutting blade face ends are oppositely tiltedly stretched backwards respectively and are formed the second cutting blade face, allow the junction of two the first cutting blade faces and two the second cutting blade faces form the apex point section that straight line extends and be convex shape, and the angle of apex point section is between 150 °～179 °.
The fish tail type drill point that described circuit board is used, wherein this drill flute section is provided with spiral chip area by two cutting blade side edge towards the drill body part direction.
The fish tail type drill point that described circuit board is used, wherein this drill flute section external diameter is more than or equal to 0.2mm.
The fish tail type drill point that described circuit board is used, wherein this drill body part is straight handle type or undercutting formula.
The fish tail type drill point that described circuit board is used, wherein the external diameter of this drill body part is 2.0mm～3.175mm.
The fish tail type drill point that described circuit board is used, wherein the angle of this apex point section is 170 °.
Compared with prior art, adopt the advantage that the utlity model has of technique scheme to be:
This drill point of the present utility model utilizes recess allow unbearable can directly not be contacted with circuit board surface, and the two symmetrical shapes of apex point section are contacted with the flexible circuit board surface, two apex point sections are that linearity extends and makes contact area increase, and two apex point sections make torsion reduce from unbearable Distance Shortened, so just can avoid producing the situation of rocking and being offset during drill point boring, and then reach the purpose that promotes boring precision and qualification rate.
This drill point of the present utility model be with two apex point sections linearly and symmetrical shape be contacted with the flexible circuit board surface, and the angle of apex point section is between 150 °～179 °, when allowing drill point rotate, two apex point sections are the negative angle cutting, two apex point sections just only can promote or the extruding flexible circuit board uniformly, outer peripheral edges cutting with two the second cutting blade faces pierces flexible circuit board again, allow Copper Foil carried out the ring-type cutting under the state that compresses, so Copper Foil just can not produce the situation of the inconsistent burr that turn up (Burr), and then reaches the purpose of improving product qualification rate.
Description of drawings
Fig. 1 is side view of the present utility model;
Fig. 2 is the partial enlarged drawing of the utility model Fig. 1;
Fig. 3 is front view of the present utility model;
Fig. 4 is the schematic side view before the utility model drilling;
Schematic side view when Fig. 5 is the utility model drilling (one);
Schematic side view when Fig. 6 is the utility model drilling (two);
Schematic side view when Fig. 7 is existing drill point drilling;
Schematic side view when Fig. 8 is existing fish tail type drill point drilling.
Description of reference numerals: 1-drill point; The 11-drill body part; 12-drill flute section; The 13-cutting blade; 130-is unbearable; The 131-recess; 132-the first cutting blade face; 133-the second cutting blade face; 134-apex point section; The 135-gap; The 14-chip area; The 2-flexible circuit board; The 21-hole; The 22-smear metal; The A-drill point; A1-is unbearable; The A2-cutting blade; The A3-recess; The B-flexible circuit board.
The specific embodiment
For reaching above-mentioned purpose and effect, the technological means that the utility model adopts and structure thereof, hereby drawing illustrates in detail that with regard to preferred embodiment of the present utility model its features and functions is as follows, understands fully in order to do profit.
see also Fig. 1, Fig. 2, shown in Figure 3, be respectively side view of the present utility model, the partial enlarged drawing of Fig. 1, front view, find out by knowing in figure, drill point 1 of the present utility model is for having drill body part 11, drill body part 11 front ends are extended with drill flute section 12, and be provided with two cutting blades 13 that are the reverse symmetry shape in drill flute section 12 away from the front end of drill body part 11, and two cutting blades 13 are the relative tilt shape makes the junction form unbearable 130, and the center staggered place of allowing is formed with a recess 131, allow unbearable 130 bottoms that are positioned at recess 131 locate, two cutting blade 13 end faces have to be positioned to be crossed unbearable 130 forward after the outer cause of unbearable 130 1 sides and extends to opposite side and be the first cutting blade face 132 that rolls shape, between two the first cutting blade faces 132 for being formed with an angle α between 179 °～120 °, two the first cutting blade face 132 ends are oppositely tiltedly stretched backwards respectively and are formed the second cutting blade face 133, allow the junction of two the first cutting blade faces 132 and two the second cutting blade faces 133 form the apex point section 134 that straight line extends and be convex shape, and the angle beta of apex point section 134 is between 150 °～179 °, drill flute section 12 is provided with spiral chip area 14 by being positioned at two cutting blade 13 side edge towards drill body part 11 directions again.
Moreover, drill flute section 12 outside diameter d of above-mentioned drill point 1 can be more than or equal to 0.2mm, and the drill body part 11 of drill point 1 can be a straight handle type (Straight) or undercutting formula (Undercut), the D outer diameter of drill body part 11 can be 2.0mm～3.175mm, and drill body part 11 and drill flute section 12 can be formed in one and make or separate to make and organize structure again and form.
Separately; the second cutting blade face 133 outer rim places that this drill flute section 12 is positioned at two cutting blades 13 can further be concaved with respectively gap 135; and two gaps 135 are to extend in the shape of a spiral towards drill body part 11 directions; it is only a kind of better enforcement state; but when practical application; its drill flute section 12 also can not be provided with gap 135; such as use simple and easy modification and the equivalent structure that the utility model specification and graphic content are done to change; all should in like manner be contained in scope of patent protection of the present utility model, close and give Chen Ming.
please arrange in pairs or groups and consult Fig. 4, Fig. 5, shown in Figure 6, be respectively the front schematic side view of the utility model drilling, schematic side view during drilling (one), schematic side view during drilling (two), find out by knowing in figure, when drill point 1 of the present utility model during in bore operation, for first with drill flute section 12 with two cutting blades 13 towards flexible circuit board 2(Flexible Printed Circuit, FPC) or slim hard circuit board surface, axially move down again and make two apex point sections 134 be contacted with flexible circuit board 2 surfaces, after just drill point 1 can be rotated and carry out Drilling operation, the hole 21 that flexible circuit board 2 is formed with penetrate up and down shape, owing to utilizing recess 131 to allow unbearable 130 can directly not be contacted with flexible circuit board 2 surfaces, and two apex point sections 134 are contacted with flexible circuit board 2 surfaces for symmetrical shape, two apex point sections 134 linearly extension again make contact area increase, just can allow drill point 1 move down contact flexible circuit board 2 surface and when rotating, its drill point 1 can not produce the problem of skew, and two apex point sections 134 are not the outer radius that is aligned with drill flute section 12, so two apex point sections 134 just can shorten from unbearable 130 distance, the torsion that two apex point section 134 contact flexible circuit board 2 surfaces produce when drill point 1 rotates will reduce, can avoid drill point 1 to produce the situation of rocking and being offset, and then reach the purpose that promotes boring precision and qualification rate.
in addition, because drill point 1 be with two apex point sections 134 linearly and symmetrical shape be contacted with flexible circuit board 2 surfaces, and the angle beta of its apex point section 134 is between 150 °～179 °, and the preferred angle β of apex point section 134 is 170 °, so when drill point 1 rotates, two apex point sections 134 are to be the negative angle cutting, but because flexible circuit board 2 is to have flexible softwood matter, so two apex point sections 134 just only can promote or push flexible circuit board 2, recess 131 between two apex point sections 134 also can accommodating distortion flexible circuit board 2, until after two the second cutting blade faces 133 are contacted with flexible circuit board 2 surfaces completely, the outer peripheral edges of two the second cutting blade face 133 just can certain cutting pierce flexible circuit board 2, the flexible circuit board 2 that allows drill flute section 12 align is cut to pierce and forms smear metal 22 and drop down, just can form hole 21 on flexible circuit board 2, and during 12 drilling of drill flute section, its chip area 14 can carry out quick chip removal.
owing to using multi-layer soft circuit board 2 in increasing electronic product now, but because flexible circuit board 2 it is inner for having Copper Foil, multi-layer soft circuit board 2 its inner Copper Foil numbers of plies just can increase, so under this situation, utilize two apex point section's 134 promotions uniformly or extruding flexible circuit boards 2, outer peripheral edges cutting with two the second cutting blade faces 133 pierces flexible circuit board 2 again, so Copper Foil is being carried out the ring-type cutting under the state that compresses, so Copper Foil just can not produce the situation of the inconsistent burr that turn up (Burr), and then reach the purpose of improving product qualification rate.
The fish tail type drill point that above-mentioned circuit board of the present utility model is used when reality is used, for can have following advantage, as:
(1) this drill point 1 is because utilize recess 131 to allow unbearable 130 can directly not be contacted with flexible circuit board 2 surfaces, and two apex point sections 134 are contacted with flexible circuit board 2 surfaces for symmetrical shape, two apex point sections 134 make contact area increase for linearity extends, and two apex point sections 134 reduce from unbearable 130 the short torsion that makes of distance, so just can avoid producing the situation of rocking and being offset during drill point 1 boring, and then reach the purpose that promotes boring precision and qualification rate.
(2) this drill point 1 be with two apex point sections 134 linearly and symmetrical shape be contacted with flexible circuit board 2 surfaces, and the angle beta of apex point section 134 is between 150 °～179 °, when allowing drill point 1 rotate, two apex point sections 134 are the negative angle cutting, two apex point sections 134 just only can promote or extruding flexible circuit board 2 uniformly, outer peripheral edges cutting with two the second cutting blade faces 133 pierces flexible circuit board 2 again, allow Copper Foil carried out the ring-type cutting under the state that compresses, so Copper Foil just can not produce the situation of the inconsistent burr that turn up (Burr), and then reach the purpose of improving product qualification rate.
therefore, the fish tail type drill point of the utility model for using mainly for circuit board, and can be extended with in drill body part 11 front ends of drill point 1 drill flute section 12, drill flute section 12 front ends are provided with two cutting blades 13 that are the reverse symmetry shape, and two cutting blades 13 are the relative tilt shape makes the junction form unbearable 130, and the center staggered place of allowing is formed with a recess 131, allow unbearable 130 bottoms that are positioned at recess 131 locate, two cutting blade 13 end faces have to be positioned to be crossed unbearable 130 forward after the outer cause of unbearable 130 1 sides and extends to opposite side and be the first cutting blade face 132 that rolls shape, between two the first cutting blade faces 132 for being formed with an angle α between 179 °～120 °, two the first cutting blade face 132 ends are oppositely tiltedly stretched backwards respectively and are formed the second cutting blade face 133, allow the junction of two the first cutting blade faces 132 and two the second cutting blade faces 133 form the apex point section 134 that straight line extends and be convex shape, and the angle beta of apex point section 134 is between 150 °～179 °, two apex point sections 134 make contact area increase for linearity extends, and two apex point sections 134 reduce from unbearable 130 the short torsion that makes of distance, so just can avoid producing the situation of rocking and being offset during drill point 1 boring, to promote boring precision and qualification rate as main key protection point.
Yet; the above is only preferred embodiment of the present utility model; non-so namely limit to the scope of the claims of the present utility model; therefore such as use simple and easy modification and the equivalent structure that the utility model specification and graphic content are done to change; all should in like manner be contained in protection domain of the present utility model, close and give Chen Ming.
Claims (6)
1. fish tail type drill point that circuit board is used, it comprises drill body part and the drill flute section of being extended by the drill body part front end, and drill flute section is provided with two cutting blades that are the reverse symmetry shape away from the front end of drill body part, it is characterized in that:
these two cutting blades are the relative tilt shape, and that the junction is formed is unbearable, and the center staggered place of allowing is formed with a recess, allow the unbearable bottom that is positioned at recess locate, two cutting blade end faces have to be positioned to cross forward after the outer cause of a unbearable side and unbearablely extend to opposite side and be the first cutting blade face that rolls shape, be formed with an angle between 179 °～120 ° between two the first cutting blade faces, two the first cutting blade face ends are oppositely tiltedly stretched backwards respectively and are formed the second cutting blade face, allow the junction of two the first cutting blade faces and two the second cutting blade faces form the apex point section that straight line extends and be convex shape, and the angle of apex point section is between 150 °～179 °.
2. the fish tail type drill point used of circuit board according to claim 1, wherein this drill flute section is provided with spiral chip area by two cutting blade side edge towards the drill body part direction.
3. the fish tail type drill point used of circuit board according to claim 1, wherein this drill flute section external diameter is more than or equal to 0.2mm.
4. the fish tail type drill point used of circuit board according to claim 1, wherein this drill body part is straight handle type or undercutting formula.
5. the fish tail type drill point used of circuit board according to claim 1, wherein the external diameter of this drill body part is 2.0mm～3.175mm.
6. the fish tail type drill point used of circuit board according to claim 1, wherein the angle of this apex point section is 170 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320299309 CN203265714U (en) | 2013-05-28 | 2013-05-28 | Fishtail-type drill pin used for circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320299309 CN203265714U (en) | 2013-05-28 | 2013-05-28 | Fishtail-type drill pin used for circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203265714U true CN203265714U (en) | 2013-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320299309 Expired - Fee Related CN203265714U (en) | 2013-05-28 | 2013-05-28 | Fishtail-type drill pin used for circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203265714U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001709A (en) * | 2016-05-20 | 2016-10-12 | 冯立友 | Complete cutting u-type eccentric blade drill bit |
| WO2019019334A1 (en) * | 2017-07-24 | 2019-01-31 | 方大控股有限公司 | Alloy drill bit facilitating chip removal |
-
2013
- 2013-05-28 CN CN 201320299309 patent/CN203265714U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001709A (en) * | 2016-05-20 | 2016-10-12 | 冯立友 | Complete cutting u-type eccentric blade drill bit |
| WO2019019334A1 (en) * | 2017-07-24 | 2019-01-31 | 方大控股有限公司 | Alloy drill bit facilitating chip removal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI TOPOINT PRECISION TECHNOLOGY COMPANY LIMI Free format text: FORMER OWNER: TOP POINT TECHNOLOGY CO., LTD. Effective date: 20141224 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: TAIWAN, CHINA TO: 201801 JIADING, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20141224 Address after: 201801 Shanghai Fengdeng Jiading District Malu Town Road No. 505 Patentee after: Top point Technology Co., Ltd. Address before: Chinese Taiwan New Taipei City Patentee before: Top point Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20210528 |