EP2610970B1 - Solderable contact pin for printed circuit boards and process for manufacturing an electronic device - Google Patents
Solderable contact pin for printed circuit boards and process for manufacturing an electronic device Download PDFInfo
- Publication number
- EP2610970B1 EP2610970B1 EP12199794.4A EP12199794A EP2610970B1 EP 2610970 B1 EP2610970 B1 EP 2610970B1 EP 12199794 A EP12199794 A EP 12199794A EP 2610970 B1 EP2610970 B1 EP 2610970B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coupling portion
- mechanical coupling
- elastic elements
- printed circuit
- outer edges
- 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.)
- Not-in-force
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- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 238000000034 method Methods 0.000 title claims description 9
- 230000008878 coupling Effects 0.000 claims description 48
- 238000010168 coupling process Methods 0.000 claims description 48
- 238000005859 coupling reaction Methods 0.000 claims description 48
- 238000005476 soldering Methods 0.000 claims description 17
- 229910000679 solder Inorganic materials 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000001465 metallisation Methods 0.000 claims description 9
- 238000000151 deposition Methods 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000005499 meniscus Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009760 electrical discharge machining Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/50—Fixed connections
- H01R12/51—Fixed connections for rigid printed circuits or like structures
- H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
- H01R12/58—Fixed connections for rigid printed circuits or like structures characterised by the terminals terminals for insertion into holes
- H01R12/585—Terminals having a press fit or a compliant portion and a shank passing through a hole in the printed circuit board
Definitions
- the present invention relates to an electronic device comprising a printed circuit board and a solderable contact pin, and a process for manufacturing an electronic device.
- printed circuit devices comprise printed circuit boards on which various types of components are mounted.
- Printed circuit boards have metal tracks and contact pads on one or both surfaces and through-holes, usually internally coated with a metallization layer, for mounting and electrically connecting components and, if necessary, for electrical connection between the opposite faces of the boards.
- contact pins which normally serve as terminals for the electrical connection of external devices.
- Known contact pins are made for being mounted by press fitting or soldering in the holes of printed circuit boards.
- Pins of the first type are provided with rather complex connection mechanisms, which must ensure sufficient force to retain the contact pins in their respective seats for the life of the devices.
- the forces must not be excessive.
- ensuring this balance between the mounting force and that for pin retention is expensive and critical, as it is necessary to use materials with high mechanical performance and more precise production tools and controls.
- the electrical properties of the contacts made in this way are sub-optimal.
- the resistance of the contact can be quite high, as the connection area between hole and pin is limited to the edges in contact and is subject to possible oxidation because it is not protected.
- press-fit pins examples are disclosed e.g. in DE 41 32 996 A1 , DE 43 21 065 A1 , US 3 428 934 A , GB 2 121 620 A and US 2004/154907 A1 .
- the press-fit pin of DE 41 32 996 A1 has a mechanical coupling portions in the form of a fork that extends through and projects from a seat in a printed circuit board.
- Solderable pins are simpler to make and guarantee contacts with optimal electrical properties, due to both the larger extension of the contact area and because the level of conduction is not significantly altered by possible oxidation (which at most is limited to just the surface of the solder joint).
- the positioning of the contact pins is critical and requires special machines being introduced on the soldering lines. In fact, until soldering is completed, the pins are unsteady and the transfer from a machine outside the soldering line would be highly likely to cause them to come out or, in and case, to move.
- soldering lines of this type are not very flexible and can only be used for a limited range of printed circuit devices. Their high cost is only justified if the few types of printed circuit devices are produced in sufficient volumes to saturate the production capacity, as the lines cannot be shared with other devices.
- the object of the present invention is therefore to provide an electronic device comprising a printed circuit board and a solderable contact pin, and a process for manufacturing an electronic device that enables the described limitations to be overcome.
- an electronic device comprising a printed circuit board and a solderable contact pin, and a process for manufacturing an electronic device are provided as defined in claims 1 and 9, respectively.
- solderable contact pin for printed circuit boards is indicated as a whole by reference numeral 1.
- the pin 1 is obtained by shearing from a lamina of metal and comprises a terminal 2 and a mechanical coupling portion 3, which extend along an axis A, on opposite sides of a base 5.
- the base 5 comprises two facing arms, transversal to axis A and defining a seat for mounting the pin 1 on a printed circuit board (not shown in Figures 1-3 ).
- the mechanical coupling portion 3 comprises two elastic elements 6 and 7 on opposite sides with respect to axis A and has a length L that is less than the thickness of a printed circuit board on which the pin 1 is intended to be mounted (the length L of the coupling portion is understood as defined between the side of the base 5 from which the mechanical coupling portion 3 projects and a longitudinal extremity, along axis A, of the mechanical coupling portion 3).
- the elastic elements 6 and 7 form a fork along axis A and are shaped so that, following the insertion of the mechanical coupling portion 3 in an opening (such as a hole of a printed circuit board) with a width less than a maximum distance D between respective outer edges 6a and 7a of the elastic elements 6 and 7, respective free ends 6b and 7b of the elastic elements 6 are rotated towards each other (as shown in Figures 4 and 5 , and which shall be described hereinafter).
- the elastic elements 6 and 7 have respective contact sections 6c and 7c and respective guide sections 6d and 7d.
- the contact sections 6c and 7c of the mechanical coupling portion 3 project in the opposite direction with respect to terminal 2 and are connected to the base 5 by a connecting portion 8, which forms a narrowing between the base 5 and the mechanical coupling portion 3.
- the outer edges 6a and 7a of the elastic elements 6 and 7 are substantially straight and parallel to axis A.
- the contact sections 6c and 7c of the elastic elements 6 and 7 also form respective hooking elements 9 and 10 with a connecting portion.
- the hooking elements 9 and 10 are defined by sharp edges at the connection between the respective outer edges 6a and 7a of the elastic elements 6 and 7 and respective edges 11 and 12 of the connecting portion 8.
- angles ⁇ formed by the outer edges 6a and 7a and the respective edges 11 and 12 of the connecting portion are less than 135°, preferably between 45° and 90°.
- the sharp edges that define the hooking elements 9 and 10 extend in a perpendicular direction to the outer edges 6a and 7a.
- the guide sections 6d and 7d are shaped so as to facilitate the rotation of the elastic elements 6 and 7 towards each other following the introduction of the mechanical coupling portion in an opening having a width less than the distance between the outer edges.
- the outer edges 6a and 7a of the elastic elements 6 and 7 are curvilinear and converge towards each other at the respective free ends 6b and 7b, which are spaced from each other in absence of stress.
- the elastic elements 6 and 7 are shaped so that the hooking elements 9 and 10 are turned outwards to prevent the extraction of the mechanical coupling portion 3 from an opening in which it has been inserted, thus ensuring temporary locking of the pin 1.
- Figure 4 shows a step of press fitting the pin 1 into a printed circuit board 15 to manufacture an electronic device 16, part of which is visible in Figure 5 .
- the operation is performed by a specially provided press-fitting machine 30, of a type in itself known ( Figure 6 ).
- the printed circuit board 15 has a thickness T that is greater than the length L of the mechanical coupling portion 3 of the pin 1 and has two opposite faces 17 and 18 parallel to each other, on which the conductive tracks 19 are arranged, these being produced, for example, by lamination of a copper layer with subsequent definition via a spark erosion process.
- the printed circuit board 15 also has through-holes 20 (only one is visible in Figure 4 and to which reference will be made).
- the through-hole 20 is internally coated with a metallization layer 21, for example, electroplated copper.
- the metallization layer 21 is connected to a contact pad 23 on face 17 and to one of the tracks 19 on face 18.
- the clear width W of the through-hole 20 is less than the distance D between the outer edges 6a and 7a of the elastic elements 6 and 7.
- the shape of the guide sections 6d and 7d causes the rotation of the free ends 6b and 7b of the elastic elements 6 and 7 towards each other and towards axis A (arrows 26 and 27).
- the contact sections 6c and 7c exert an elastic reaction against the walls of the through-hole 20.
- the hooking elements 9 and 10 which are turned outwards due to the rotation of the elastic elements 6 and 7, cut into the metallization layer 21 and remain embedded, obstructing the extraction of the mechanical coupling portion 3 from the through-hole 20.
- the mechanical coupling portion 3 ensures that the pin 1 is temporarily centred and locked to the printed circuit board 15 before further processing steps are performed.
- the mechanical coupling portion 3 is completely contained between the faces 17 and 18 of the printed circuit board 15 and does not protrude from face 18.
- the grip offered by the mechanical coupling portion 3 is not sufficient to ensure correct functionality in use, because the contact with the walls of the through-hole 20 is only partially exploited. Nevertheless, the coupling is stable enough to enable transport of the printed circuit board 15 without significant risks of the pins coming out before final soldering.
- the printed circuit board 15, with the pin 1 pressed in and temporarily retained in the through-hole 20, is then moved from the press-fitting machine 30 to an SMT soldering line 31, which comprises a depositing station 32 and an oven 33 ( Figure 6 ).
- SMT soldering line 31 which comprises a depositing station 32 and an oven 33 ( Figure 6 ).
- particles of solder material are deposited on the printed circuit board 15 around the through-hole on the side of the pad 19 and where it is required for manufacturing the electronic device 16.
- SMT soldering is possible because the length L of the mechanical coupling portion 3 is such that no part of the pin 1 protrudes from face 18.
- the depositing step normally also provides for the removal of excess solder material by means of a doctor blade, which could not be used with normal protruding press-fit pins.
- the printed circuit board 15 is then transferred to the oven 33 for fusion.
- the molten solder material penetrates into the through-hole 20 by capillarity, filling it and forming a solder meniscus on both the side with pad 19 and the side with pad 23.
- the soldering line is of the wave type.
- the solder material is thus transferred to the printed circuit board 15 by contact with a crest of a wave in the liquid state that laps the pad 19 and penetrates the metallized hole 20, filling it and creating the solder menisci on both sides of the printed circuit board 15.
- the electronic device 16 can be used both as a simple connector and as a true processing board, if equipped with further analogue and/or digital components.
- the invention therefore enables making high-quality soldered contacts (it should be noted that the entire mechanical coupling portion also accomplishes the function of electrical connection to the printed circuit board through the solder material), but without the costs of soldering lines with dedicated press-fitting machines.
- the mechanical coupling portion of the contact pins may be made in a very simple manner, using ordinary and not special materials, and does not require complex mechanisms with critical details like press-fit pins.
- the open fork shaped enables exerting sufficient force for temporarily retaining the pins seated in the soldering position.
- the constructional simplicity results in a low number of production rejects and consequently in high output.
- a solderable contact pin 100 for printed circuit boards comprises a terminal 102 with an output along an axis C at 90° with respect to the press-fitting axes A and B, a mechanical coupling portion 103 and a base 105.
- the base 105 which in the described embodiment has a substantially quadrangular frame shape, defines a contact position for mounting the pin 100 on a printed circuit board ( Figure 8 ) .
- the mechanical coupling portion 103 extends from the base 105 along axis A and comprises two elastic elements 106 and 107, which form a fork and are provided with respective hooking elements 109 and 110, substantially as already described with reference to Figures 1-5 .
- the mechanical coupling portion 103 has a length L' that is less than the thickness of a printed circuit board on which the pin 1 is destined to be mounted ( Figure 8 ).
- a centering pin 104 protrudes from the base 105 along axis B, which is parallel to axis A of the mechanical coupling portion 103.
- the terminal 102 extends from the base 105 transversally to axis A of the mechanical coupling portion 103, in particular along axis C, which is perpendicular to axis A.
- the pin 100 is mounted on a printed circuit board 115 to manufacture an electronic device 116.
- the printed circuit board 115 which has a thickness T' greater than the length L' of the mechanical coupling portion 3 of pin 1, has a through-hole 120, provided with a metallization layer 121 and connected to a track 119 and a pad 123, and an auxiliary hole 120' that, in one embodiment, is devoid of metallization to avoid an excessive increase in the press-fit force.
- the pin 100 is mounted with the mechanical coupling portion 103 inserted and soldered in the through-hole 120, with axis A perpendicular to the faces 117 and 118 of the printed circuit board 120, while the centering pin 104 is inserted in the auxiliary hole 120' without soldering.
- the centering pin 104 can also be soldered.
- the soldering can be of the SMT or wave type in this case as well.
- the terminal 102 is therefore substantially parallel to the faces of the printed circuit board 115.
Description
- The present invention relates to an electronic device comprising a printed circuit board and a solderable contact pin, and a process for manufacturing an electronic device.
- As is known, printed circuit devices comprise printed circuit boards on which various types of components are mounted. Printed circuit boards have metal tracks and contact pads on one or both surfaces and through-holes, usually internally coated with a metallization layer, for mounting and electrically connecting components and, if necessary, for electrical connection between the opposite faces of the boards.
- Among the components normally used in printed circuit devices, there are also contact pins, which normally serve as terminals for the electrical connection of external devices.
- Known contact pins are made for being mounted by press fitting or soldering in the holes of printed circuit boards.
- Pins of the first type are provided with rather complex connection mechanisms, which must ensure sufficient force to retain the contact pins in their respective seats for the life of the devices. At the same time, in order to avoid damage to the hole's metallization layer and consequent loss of reliability in the electrical contact, the forces must not be excessive. In production, ensuring this balance between the mounting force and that for pin retention is expensive and critical, as it is necessary to use materials with high mechanical performance and more precise production tools and controls. In addition, the electrical properties of the contacts made in this way are sub-optimal. In particular, the resistance of the contact can be quite high, as the connection area between hole and pin is limited to the edges in contact and is subject to possible oxidation because it is not protected.
- Examples of press-fit pins are disclosed e.g. in
DE 41 32 996 A1 ,DE 43 21 065 A1 ,US 3 428 934 A ,GB 2 121 620 A US 2004/154907 A1 . In particular, the press-fit pin ofDE 41 32 996 A1 has a mechanical coupling portions in the form of a fork that extends through and projects from a seat in a printed circuit board. - Solderable pins are simpler to make and guarantee contacts with optimal electrical properties, due to both the larger extension of the contact area and because the level of conduction is not significantly altered by possible oxidation (which at most is limited to just the surface of the solder joint). On the other hand, the positioning of the contact pins is critical and requires special machines being introduced on the soldering lines. In fact, until soldering is completed, the pins are unsteady and the transfer from a machine outside the soldering line would be highly likely to cause them to come out or, in and case, to move.
- However, soldering lines of this type are not very flexible and can only be used for a limited range of printed circuit devices. Their high cost is only justified if the few types of printed circuit devices are produced in sufficient volumes to saturate the production capacity, as the lines cannot be shared with other devices.
- The object of the present invention is therefore to provide an electronic device comprising a printed circuit board and a solderable contact pin, and a process for manufacturing an electronic device that enables the described limitations to be overcome.
- According to the present invention, an electronic device comprising a printed circuit board and a solderable contact pin, and a process for manufacturing an electronic device are provided as defined in
claims - The present invention will now be described with reference to the attached drawings, which illustrate some non-limitative embodiments, wherein:
-
Figure 1 is a front view of a contact pin for printed circuit boards in accordance with one embodiment of the present invention; -
Figure 2 is a side view of the contact pin inFigure 1 ; -
Figure 3 shows an enlarged detail of the view inFigure 1 ; -
Figure 4 is a front view of the pin inFigure 1 in the step of insertion in a printed circuit board; -
Figure 5 is a front view of the pin inFigure 1 fastened in a printed circuit board to form a printed circuit device; -
Figure 6 is a simplified block diagram regarding a process for manufacturing an electronic device in accordance with one embodiment of the present invention; -
Figure 7 is a front view of a contact pin for printed circuit boards in accordance with a different embodiment of the present invention; and -
Figure 8 is a front view of the pin inFigure 7 fastened in a printed circuit board to form a printed circuit device. - With reference to
Figures 1-3 , a solderable contact pin for printed circuit boards is indicated as a whole byreference numeral 1. - The
pin 1 is obtained by shearing from a lamina of metal and comprises aterminal 2 and amechanical coupling portion 3, which extend along an axis A, on opposite sides of abase 5. In turn, thebase 5 comprises two facing arms, transversal to axis A and defining a seat for mounting thepin 1 on a printed circuit board (not shown inFigures 1-3 ). - The
mechanical coupling portion 3 comprises twoelastic elements pin 1 is intended to be mounted (the length L of the coupling portion is understood as defined between the side of thebase 5 from which themechanical coupling portion 3 projects and a longitudinal extremity, along axis A, of the mechanical coupling portion 3). Theelastic elements mechanical coupling portion 3 in an opening (such as a hole of a printed circuit board) with a width less than a maximum distance D between respectiveouter edges elastic elements free ends elastic elements 6 are rotated towards each other (as shown inFigures 4 and 5 , and which shall be described hereinafter). - More precisely, the
elastic elements respective contact sections respective guide sections - The
contact sections mechanical coupling portion 3 project in the opposite direction with respect toterminal 2 and are connected to thebase 5 by a connectingportion 8, which forms a narrowing between thebase 5 and themechanical coupling portion 3. Along thecontact sections outer edges elastic elements contact sections elastic elements respective hooking elements elements outer edges elastic elements respective edges portion 8. In addition, the angles α formed by theouter edges respective edges hooking elements outer edges - The
guide sections elastic elements guide sections outer edges elastic elements free ends - In practice, the
elastic elements hooking elements mechanical coupling portion 3 from an opening in which it has been inserted, thus ensuring temporary locking of thepin 1. -
Figure 4 shows a step of press fitting thepin 1 into a printedcircuit board 15 to manufacture anelectronic device 16, part of which is visible inFigure 5 . The operation is performed by a specially provided press-fitting machine 30, of a type in itself known (Figure 6 ). - The printed
circuit board 15 has a thickness T that is greater than the length L of themechanical coupling portion 3 of thepin 1 and has twoopposite faces conductive tracks 19 are arranged, these being produced, for example, by lamination of a copper layer with subsequent definition via a spark erosion process. The printedcircuit board 15 also has through-holes 20 (only one is visible inFigure 4 and to which reference will be made). The through-hole 20 is internally coated with ametallization layer 21, for example, electroplated copper. In the described embodiment, in particular, themetallization layer 21 is connected to acontact pad 23 onface 17 and to one of thetracks 19 onface 18. The clear width W of the through-hole 20 is less than the distance D between theouter edges elastic elements - When the
mechanical coupling portion 3 is inserted in the through-hole 20 throughface 17 of the printed circuit board 15 (in the direction indicated by arrow 25), the shape of theguide sections free ends elastic elements arrows 26 and 27). In this way, thecontact sections hole 20. Furthermore, the hookingelements elastic elements metallization layer 21 and remain embedded, obstructing the extraction of themechanical coupling portion 3 from the through-hole 20. Themechanical coupling portion 3 ensures that thepin 1 is temporarily centred and locked to the printedcircuit board 15 before further processing steps are performed. - Furthermore, given that the length L is less than the thickness T, the
mechanical coupling portion 3 is completely contained between thefaces circuit board 15 and does not protrude fromface 18. The grip offered by themechanical coupling portion 3 is not sufficient to ensure correct functionality in use, because the contact with the walls of the through-hole 20 is only partially exploited. Nevertheless, the coupling is stable enough to enable transport of the printedcircuit board 15 without significant risks of the pins coming out before final soldering. - The printed
circuit board 15, with thepin 1 pressed in and temporarily retained in the through-hole 20, is then moved from the press-fitting machine 30 to anSMT soldering line 31, which comprises adepositing station 32 and an oven 33 (Figure 6 ). At thedepositing station 32, particles of solder material are deposited on the printedcircuit board 15 around the through-hole on the side of thepad 19 and where it is required for manufacturing theelectronic device 16. It should be noted that SMT soldering is possible because the length L of themechanical coupling portion 3 is such that no part of thepin 1 protrudes fromface 18. The depositing step normally also provides for the removal of excess solder material by means of a doctor blade, which could not be used with normal protruding press-fit pins. - The printed
circuit board 15 is then transferred to theoven 33 for fusion. The molten solder material penetrates into the through-hole 20 by capillarity, filling it and forming a solder meniscus on both the side withpad 19 and the side withpad 23. Theelectronic device 16, part of which is shown inFigure 5 (where the solder material and the meniscus are respectively indicated byreference numerals 28 and 29), is thus obtained. - In an alternative embodiment that is not shown, the soldering line is of the wave type. The solder material is thus transferred to the printed
circuit board 15 by contact with a crest of a wave in the liquid state that laps thepad 19 and penetrates the metallizedhole 20, filling it and creating the solder menisci on both sides of the printedcircuit board 15. - The
electronic device 16 can be used both as a simple connector and as a true processing board, if equipped with further analogue and/or digital components. - Since the
contact pin 1 is fastened, albeit in a temporary manner, to printedcircuit board 15 by themechanical coupling portion 3, transfer from the press-fittingmachine 30 to thesoldering line 31 is not critical and the risk of altering the position of thecontact pin 1 is reduced to acceptable limits. Therefore, press fitting may be carried out externally to the soldering line and the available machines may be exploited in a flexible manner to make a wide variety of printed circuit devices. - The invention therefore enables making high-quality soldered contacts (it should be noted that the entire mechanical coupling portion also accomplishes the function of electrical connection to the printed circuit board through the solder material), but without the costs of soldering lines with dedicated press-fitting machines.
- Furthermore, the mechanical coupling portion of the contact pins may be made in a very simple manner, using ordinary and not special materials, and does not require complex mechanisms with critical details like press-fit pins. In particular, the open fork shaped enables exerting sufficient force for temporarily retaining the pins seated in the soldering position. The constructional simplicity results in a low number of production rejects and consequently in high output.
- According to a different embodiment of the invention, shown in
Figures 7 and 8 , asolderable contact pin 100 for printed circuit boards comprises a terminal 102 with an output along an axis C at 90° with respect to the press-fitting axes A and B, amechanical coupling portion 103 and abase 105. - The
base 105, which in the described embodiment has a substantially quadrangular frame shape, defines a contact position for mounting thepin 100 on a printed circuit board (Figure 8 ) . - The
mechanical coupling portion 103 extends from thebase 105 along axis A and comprises twoelastic elements elements Figures 1-5 . In particular, themechanical coupling portion 103 has a length L' that is less than the thickness of a printed circuit board on which thepin 1 is destined to be mounted (Figure 8 ). - A centering
pin 104 protrudes from thebase 105 along axis B, which is parallel to axis A of themechanical coupling portion 103. - The terminal 102 extends from the base 105 transversally to axis A of the
mechanical coupling portion 103, in particular along axis C, which is perpendicular to axis A. - In
Figure 8 , thepin 100 is mounted on a printedcircuit board 115 to manufacture anelectronic device 116. - The printed
circuit board 115, which has a thickness T' greater than the length L' of themechanical coupling portion 3 ofpin 1, has a through-hole 120, provided with ametallization layer 121 and connected to atrack 119 and apad 123, and an auxiliary hole 120' that, in one embodiment, is devoid of metallization to avoid an excessive increase in the press-fit force.
Thepin 100 is mounted with themechanical coupling portion 103 inserted and soldered in the through-hole 120, with axis A perpendicular to thefaces circuit board 120, while the centeringpin 104 is inserted in the auxiliary hole 120' without soldering. Optionally, the centeringpin 104 can also be soldered. The soldering can be of the SMT or wave type in this case as well. - In the described embodiment, the terminal 102 is therefore substantially parallel to the faces of the printed
circuit board 115. - Finally, it is clear that modification and changes can be made to the described contact pin and process without leaving the scope of the present invention, as defined in the appended claims.
Claims (10)
- An electronic device comprising a printed circuit board (15; 115), having at least one hole (20; 120), and a contact pin (1; 100) in the hole (20; 120), the contact pin (1; 100) comprising a terminal (2; 102) and a mechanical coupling portion (3; 103), extending along an axis (A); wherein the mechanical coupling portion (3; 103) comprises two elastic elements (6, 7; 106, 107), forming a fork along the axis (A); characterized in that the mechanical coupling portion (3; 103) has a length (L; L') less than a thickness (T; T') of the printed circuit board (15), the contact pin (1; 100) is a metal lamina and the elastic elements (6, 7; 106, 107) are provided with respective hooking elements (9, 10; 109, 110); wherein the elastic elements (6, 7; 106, 107) are shaped so that, following the insertion of the mechanical coupling portion (3; 103) in an opening defined by the hole (20; 120) having a width (W) less than a maximum distance (D) between respective outer edges (6a, 7a) of the elastic elements (6, 7; 106, 107), respective free ends (6b, 7b) of the elastic elements (6, 7; 106, 107) are rotated towards each other and the hooking elements (9, 10; 109, 110) are turned outwards to prevent the extraction of the mechanical coupling portion (3; 103) from the opening; wherein the elastic elements (6, 7; 106, 107) have respective contact sections (6c, 7c) and respective guide sections (6d, 7d), and wherein the guide sections (6d, 7d) are shaped so as to facilitate the rotation of the elastic elements (6, 7; 106, 107) towards each other following the introduction of the mechanical coupling portion (3; 103) in an opening having a width (W) less than the distance (D) between the outer edges (6a, 78); and wherein the hooking elements (9, 10; 109, 110) are defined by sharp edges transverse to the outer edges (6a, 7a) of the elastic elements (6, 7; 106, 107) in the contact sections (6c, 7c), at the ends of the outer edges (6a, 7a) opposite to the free ends (6b, 7b).
- The device according to claim 1, wherein the mechanical coupling portion (3; 103) is connected to the terminal (2; 102) by a connecting portion (8) and the hooking elements (9, 10; 109, 110) are defined by respective outer edges (6a, 7a) and by respective edges of the connecting portion (8).
- The device according to claim 2, wherein the outer edges (6a, 7a) of the mechanical coupling portion (3; 103) and the respective edges of the connecting portion (8) form angles (α) of less than 135°.
- The device according to any of the preceding claims, wherein the free ends (6b, 7b) of the elastic elements (6, 7; 106, 107) are spaced from each other in absence of stress,
- The device according to any of the preceding claims, having the mechanical coupling portion (3; 103) soldered into the hole (20; 120).
- The device according to claim 5, wherein the mechanical coupling portion (3; 103) is completely contained between the opposite faces (17, 18; 117, 118) of the printed circuit board (15; 115).
- The device according to claim 6, wherein the hole (20; 120) is internally coated with a metallization layer (21; 121).
- The device according to claim 7, wherein the metallization layer (21; 121) is cut into by the hooking elements (9, 10; 109, 110) of the mechanical coupling portion (3; 103).
- A process of manufacturing an electronic device, comprising the steps of:providing a contact pin (1; 100) having a terminal (2; 102) and a mechanical coupling portion (3; 103), extending along an axis (A); wherein the mechanical coupling portion (3; 103) comprises two elastic elements (6, 7; 106, 107), forming a fork along the axis (A);characterized by:providing a printed circuit board (15; 115), having at least one hole (20; 120) with a width (W) less than the maximum distance (D) between the respective outer edges (6a, 7a) of the elastic elements (6, 7; 106, 107), the length (L; L') of the mechanical coupling portion (3; 103) being less than the thickness (T; T') of the printed circuit board (5; 105);press-fitting the mechanical coupling portion (3; 103) of the contact pin (1; 100) into the hole (20; 120); andsoldering the mechanical coupling portion (3; 103) of the contact pin (1; 100) in the hole (20; 120);wherein the contact pin (1; 100) is a metal lamina and the elastic elements (6, 7; 106, 107) are provided with respective hooking elements (9, 10; 109, 110); wherein the elastic elements (6, 7; 106, 107) are shaped so that, following the insertion of the mechanical coupling portion (3; 103) in an opening defined by the hole (20; 120) having a width (W) less than a maximum distance (D) between respective outer edges (6a, 7a) of the elastic elements (6, 7; 106, 107), respective free ends (6b, 7b) of the elastic elements (6, 7; 106, 107) are rotated towards each other and the hooking elements (9, 10; 109, 110) are turned outwards to prevent the extraction of the mechanical coupling portion (3; 103) from the opening; wherein the elastic elements (6, 7; 106, 107) have respective contact sections (6c, 7c) and respective guide sections (6d, 7d), and wherein the guide sections (6d, 7d) are shaped so as to facilitate the rotation of the elastic elements (6, 7; 106, 107) towards each other following the introduction of the mechanical coupling portion (3; 103) in an opening having a width (W) less than the distance (D) between the outer edges (6a, 7a); and wherein the hooking elements (9, 10; 109, 110) are defined by sharp edges transverse to the outer edges (6a, 7a) of the elastic elements (6, 7; 106, 107) in the contact sections (6c, 7c), at the ends of the outer edges (6a, 7a) opposite to the free ends (6b, 7b).
- The process according to claim 9, comprising depositing a solder material (28) after the step of press-fitting and before the step of soldering.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL12199794T PL2610970T3 (en) | 2011-12-30 | 2012-12-31 | Solderable contact pin for printed circuit boards and process for manufacturing an electronic device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT001245A ITTO20111245A1 (en) | 2011-12-30 | 2011-12-30 | CONTACT FEET TO WELD FOR CARDS WITH PRINTED CIRCUITS AND PROCEDURE FOR REALIZING AN ELECTRONIC DEVICE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2610970A1 EP2610970A1 (en) | 2013-07-03 |
EP2610970B1 true EP2610970B1 (en) | 2018-07-25 |
Family
ID=45614977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12199794.4A Not-in-force EP2610970B1 (en) | 2011-12-30 | 2012-12-31 | Solderable contact pin for printed circuit boards and process for manufacturing an electronic device |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2610970B1 (en) |
ES (1) | ES2682245T3 (en) |
IT (1) | ITTO20111245A1 (en) |
PL (1) | PL2610970T3 (en) |
PT (1) | PT2610970T (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016164825A (en) * | 2015-03-06 | 2016-09-08 | 富士電機株式会社 | Connection terminal |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5497546A (en) * | 1992-09-21 | 1996-03-12 | Matsushita Electric Works, Ltd. | Method for mounting lead terminals to circuit board |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3428934A (en) * | 1967-02-28 | 1969-02-18 | Amp Inc | Electrical connector for printed circuit board |
GB2121620A (en) * | 1982-06-08 | 1983-12-21 | Oxley Dev Co Ltd | Connectors pins for printed circuit boards |
DE4132996C2 (en) * | 1991-05-16 | 2003-03-20 | Eads Deutschland Gmbh | Contact pin for printed circuit boards |
DE4321065A1 (en) * | 1993-06-24 | 1995-01-19 | Phoenix Contact Gmbh & Co | Connecting strip |
US7030325B2 (en) * | 2002-12-16 | 2006-04-18 | Trw Automotive U.S. Llc | Electrical switch assembly |
-
2011
- 2011-12-30 IT IT001245A patent/ITTO20111245A1/en unknown
-
2012
- 2012-12-31 EP EP12199794.4A patent/EP2610970B1/en not_active Not-in-force
- 2012-12-31 PT PT12199794T patent/PT2610970T/en unknown
- 2012-12-31 PL PL12199794T patent/PL2610970T3/en unknown
- 2012-12-31 ES ES12199794.4T patent/ES2682245T3/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5497546A (en) * | 1992-09-21 | 1996-03-12 | Matsushita Electric Works, Ltd. | Method for mounting lead terminals to circuit board |
Also Published As
Publication number | Publication date |
---|---|
PT2610970T (en) | 2018-10-10 |
ES2682245T3 (en) | 2018-09-19 |
EP2610970A1 (en) | 2013-07-03 |
PL2610970T3 (en) | 2018-12-31 |
ITTO20111245A1 (en) | 2013-07-01 |
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