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
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
  • H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending

Definitions

• the invention relates to a press-fit.
• the press-in contact has a
• the press-fit pin has a channel-shaped longitudinal section, wherein the channel-shaped longitudinal section is designed to make electrical contact with an inner wall of a cylindrical opening and to hold it in a force-fit manner in the opening in particular.
• press-in contacts In press-in contacts, the problem is that the press-in contact is to be pressed both with the lowest possible press-in force in the opening of a circuit substrate, as well as the circuit board in the breakthrough should contact well electrically.
• the longitudinal section in particular a press-fit zone of the press-fit contact, has two respectively spring-shaped spring legs which each have a rounding.
• the spring legs are each designed to shrink when pressed into the opening a radius of curvature of the rounding.
• the spring legs are each adapted to adjust the radius of curvature of the rounding a radius of curvature of the cylindrical aperture.
• the spring leg can advantageously electrically contact the inner wall of the opening on the largest possible surface area and thus nestle evenly against the inner wall.
• a press-in force when Einpresstwerden be kept small.
• the channel-shaped longitudinal section is formed to contact along a peripheral section the inner wall along an uninterrupted arc, in particular circular arc.
• the groove-shaped longitudinal portion which is for example U-shaped, so that the spring legs each form a U-leg of the U-shape, so along the peripheral portion generate a spring tension, which is adapted to snuggle the spring legs to the inner wall, and so Rounding the spring leg to the rounding of the inner wall of the opening to adapt.
• the aforementioned uninterrupted arc is at least half of a circumference of the inner wall.
• the spring leg on at least one - preferably on an inner wall of the trough-shaped longitudinal portion - angled end portion which is adapted to reduce when pressed an angle to the spring leg.
• the end portion can be advantageously formed a spring arm, which can facilitate the aforementioned clinging to the inner wall, and so also the curling of the spring leg.
• the angling is preferably formed by a groove or depression extending along the longitudinal axis of the press-fit pin. The thus angled section can thus deflect further reducing its angle to the adjacent section, in particular circumferential section radially inwardly angled.
• the channel-shaped longitudinal section is also called gutter below.
• the groove extends along a longitudinal axis of the injection pin.
• the end portion is angled in the region of an inner wall, so that the groove formed on the longitudinal portion on the inner wall in cross section has a kind of recess or an angle which is formed by the aforementioned spring arm and the spring leg.
• a leg length and a length of the end portion are formed such that the press-in contact can be pressed into openings with mutually different diameters.
• the longitudinal section can conform to inner walls of openings with mutually different diameters smoothly.
• the spring leg has at least two angled portions, wherein a portion of the angled portions forms the aforementioned end portion.
• the spring leg may be formed to conform to cylindrical apertures of mutually different diameters along a continuous arc.
• the channel preferably has an outer wall which is curved in cross-section, hereinafter also referred to as a lateral surface, and an inner wall of polygonal cross-section.
• the inner wall forms - more preferably at least on the groove-shaped longitudinal section of the press-in contact - in cross-section a part of a polygon, in particular polygon curve.
• the channel preferably has a channel bottom, on which the spring legs are formed.
• the channel can thus form the previously described U-shape.
• the channel-shaped longitudinal section preferably has an inlet region, a contact region and an outlet region along the longitudinal axis, wherein the inlet region and the outlet region enclose the contact region between one another.
• the channel bottom along an axis of the Einpress turns of the contact area repellent on increasing ground thickness.
• a press-in force along the longitudinal extent of the press-in pin can advantageously increase during press-fitting.
• the inlet area preferably points toward one end of the contact pin or surrounds the end, and is molded onto the contact area.
• the outlet area is preferably formed on the contact area.
• the channel bottom of the contact pin has a concave shape along the longitudinal axis of the channel in the contact region.
• the groove, in particular the spring legs in the contact region advantageously roll evenly.
• the channel bottom is preferably made thicker in the inlet region and / or in the outlet region than in the contact region.
• the spring legs of the channel can produce a spring force which acts uniformly along the longitudinal extent when the roll is rolled in, and acts radially outward along the longitudinal extent.
• the channel bottom of the outlet region has a convex shape along the longitudinal axis.
• a force measuring device can thus advantageously detect an end of the press-fitting operation.
• such a decrease in force can be compensated for by a reducing circumference of the press-fit pin in the outlet region by means of the convexly increasing bottom thickness.
• the channel bottom of the outlet region has a straight shape along the longitudinal axis.
• the thickness of the gutter floor increases so evenly. An insertion force can thus increase linearly during pressing.
• the channel bottom of the outlet region has a concave shape along the longitudinal axis.
• the thickness of the gutter floor can increase so.
• a press-in force can be so when pressing rising sharply, especially exponentially, increasing. The force measuring device can thus safely prevent too deep pressing in at low sensitivity.
• the thickness of the channel bottom preferably corresponds to a depth of the channel, with an embossed channel of an embossing depth of the channel.
• the thickness of the gutter bottom of the contact area increase repellent and / or decrease the length of the spring legs.
• the channel bottom in the contact area along the longitudinal axis is concave or straight.
• the press-in pin can be pressed in the contact area with a uniform or slightly decreasing force.
• a wall thickness of the channel wall of the channel is between one third and one quarter of a diameter of the channel in the contact region.
• the corners of the polygon each form a crease line.
• the spring leg is designed to pivot radially inwards along the bending line.
• the crease line is formed for example by a crest line of an angle formed on the inner wall, or by a notch extending along the longitudinal axis in the inner wall of the channel.
• the bend line thus forms a kind of hinge joint, on which the spring leg can pivot radially inwards.
• the press-in contact is integrally formed.
• the press-in contact can be produced, for example, advantageously by means of stamping and / or cold forming.
• the press-in contact can thus for example by cutting an end portion of a wire, in particular a Wire with a round cross-section or with a rectangular cross section, be generated, wherein the portion of the wire during or after cutting can be stamped and additionally cold formed, so that by means of the forming process of the press-in contact with the contact portion and the trough-shaped longitudinal section can be formed.
• the press-fit pin is formed by a copper alloy, such as CuSn6, comprising copper as the major constituent and six percent by weight tin.
• the copper alloy is in another embodiment, for example, a copper alloy comprising an admixture comprising chromium, silver, iron, titanium, silicon, and formed for the most part copper.
• the proportions of the admixture are, for example, 0.5 weight percent chromium, 0.1 weight percent silver, 0.08 weight percent iron, 0.06 weight percent titanium, and 0.03 weight percent silicon.
• the copper alloy is, for example, an alloy according to the UNS 18080 standard.
• the copper alloy advantageously has good electrical conductivity and a high modulus of elasticity, so that the spring legs can generate a high contact pressure.
• the invention also relates to a contact system with at least one press-in contact according to the above-described type.
• the contact system has a circuit carrier with an opening, in particular a bore, for the press-fit pin.
• the aperture has a cylindrical inner wall, wherein the diameter of the aperture is smaller than a diameter, in particular transverse diameter, of the press-fit pin.
• a press-fit pin is inserted into an opening or a blind hole of the circuit carrier, wherein two legs of a groove of the press-in pin each cling to an inner wall of the opening and a lateral surface of the channel thereby forms an uninterrupted arc of a circle, which contacts the inner wall.
• FIG. 1 shows an exemplary embodiment of a press-in contact which is designed to conform to an inner wall of a cylindrical break-through when pressed in, and a contact system comprising a circuit carrier having an opening and the press-fit contact;
• FIG. 2 shows the press-fit contact shown in FIG. 1 in a cross-section in the region of a channel-shaped longitudinal section of a press-fit pin of the press-fit contact;
• FIG. 3 shows the channel-shaped longitudinal section of the press-in pin in an opening, wherein the channel formed by the longitudinal section has been rolled up in a springy manner radially inward;
• FIG. 4 shows the channel-shaped longitudinal section of the press-in pin in an opening, whereby the channel formed by the longitudinal section has curled radially inwards in a spring-like manner, wherein a diameter of the channel-shaped longitudinal section is smaller than in FIG.
• FIG. 5 shows the press-fit pin of FIG. 1 in a longitudinal section along a longitudinal axis of the press-fit pin
• FIG. 6 shows a diagram of the force distribution of the press-fit pin via a press-in path when pressed into a breakthrough of a printed circuit board.
• Figure 1 shows - schematically - an embodiment of a press-fit. 1
• the press-fit contact 1 has a channel-shaped longitudinal section 2, on which two spaced spring legs 3 and 4 are formed as part of a channel 5.
• the longitudinal section 2 forms a press-fit zone of the press-fit contact 1.
• the press-fit contact 1 also has a press-in shoulder 10 and a press-fit shoulder 1 1, which each extend transversely to the longitudinal axis 32.
• the press shoulders 10 and 11 are each on a longitudinal section 9 along the
• the press-fit contact 1 also has a contact section 12, which is formed along a longitudinal section 13 along the longitudinal axis 32 and forms an end section of the contact element 1.
• the contact portion 12 is configured to be connected to an electrical conductor.
• the electrical conductor can be connected to the contact section, for example by resistance welding or by soldering.
• the contact portion may also be formed as a pin contact for plugging with a plug.
• the press-fit contact 1 also has a longitudinal section 8 adjoining the longitudinal section 9, to which a neck 33 of the press-fit contact 1, in particular a circular embossing, is connected.
• the press-fit contact 1 has on the longitudinal section 2 in the region of the channel 5 a subsequent to the longitudinal section 2, tapering towards the neck 33 longitudinal section 7, wherein a diameter 34 of the press-fit 1 in the region of the channel 5, in particular on the longitudinal section 2, is formed larger than a transverse diameter transverse to the longitudinal axis 32 of the neck 33rd
• the press-fit contact 1 is designed to taper along the longitudinal axis 32 to an end 36 which is remote from the contact section 12, so that the press-fit contact 1 can be easily inserted into an opening 28 in a circuit carrier 30.
• the circuit carrier 30 is formed, for example, by a printed circuit board, in particular a fiber-reinforced epoxy resin printed circuit board, or a form-cut metal sheet, also called a lead frame.
• the opening 28 is formed in this embodiment by a cylindrical bore.
• the opening 28 has a cylindrical inner wall 29, wherein a diameter 35 of the opening 28 is smaller than the diameter 34 of the press-fit in the region of the channel 5 on the longitudinal section 2.
• the inner wall 29 may in the case of the circuit board by a metal layer, in particular galvanic formed layer or a metal sleeve may be formed.
• the channel 5 is formed on a longitudinal portion 6 tapers towards the end 36, wherein the tapered longitudinal section 6 of the channel 5, an end portion 15 connects, at which the press-fit 1 has a tip 14.
• the press-in contact 1 can be inserted with the tip 14 in the opening 28.
• the press-fit contact 1 is formed with the channel 5, comprising the spring legs 3 and 4, the inner wall 29 of the opening 28 to contact electrically. In this case, the spring legs 3 and 4 are moved towards each other during insertion of the press-fit contact 1, as far as the diameter 34 of the press-fit in the region of the channel 5 is formed larger than the diameter 35 of the opening 28.
• the channel 5 extends in this embodiment along the longitudinal section. 2 along the longitudinal section 6 and along the longitudinal section 7 along the longitudinal axis 32 of the press-fit contact 1.
• the longitudinal sections 8, 7, 2, 6 and 15 form a press-fit pin 43 in this embodiment.
• the longitudinal section 2 forms the aforementioned contact area
• the longitudinal section 6 forms the aforementioned inlet area
• the longitudinal section 7 forms the aforementioned outlet area.
• FIG. 1 also shows a contact system 44.
• the contact system 44 comprises the circuit carrier 30 and the press-fit contact 1.
• the press-in contact 1 is designed to be pressed into the opening 28 of the circuit carrier 30 and thereby radially inwardly, in particular by bending the spring legs 3 and 4 and by rolling a jacket surface described in more detail in Figure 2 - resiliently against the inner wall 29 to press.
• FIG. 2 shows-schematically-the press-fit contact 1 shown in FIG. 1 in a sectional view along a section line 31 shown in FIG.
• the section line 31 extends transversely to the longitudinal axis 32 in the region of the channel 5.
• Figure 2 shows the channel 5, which has a channel bottom 16, wherein the channel bottom 16 along a peripheral portion 17 is formed.
• a spring leg 4 is formed, which extends along a peripheral portion 18 and a peripheral portion 19. The length of the peripheral sections 18 and 19 thus corresponds to the leg length described above.
• a spring leg 3 is formed, which extends along a peripheral portion 20 and along a peripheral portion 21.
• the spring legs 3 and 4 extend in mutually opposite circumferential directions around the longitudinal axis 32 circumferentially.
• the channel 5 has an articulation line 23 on an inner wall 37, wherein the spring leg 3 is designed to spring along the crease line 23 radially inwards towards the longitudinal axis 32 - angled away from the channel bottom 16.
• the groove 5 has on the inner wall and a bending line 24, wherein the spring leg 4 is formed to deflect along the bending line 24 angled radially inwardly.
• the bending lines 23 and 24 are formed, for example, by a crest line of an angle formed on the inner wall 37, or by a notch extending along the longitudinal axis 32 in the inner wall 37 of the channel 5.
• the channel 5 also has an outer wall 38, which is arranged opposite to the inner wall 37.
• the outer wall 38 has in this embodiment, an arcuate shape, wherein the groove 5 is formed, during compression of the spring legs 3 and 4 radially inwardly, the arch shape of the outer wall 38, hereinafter also called lateral surface to maintain.
• the lateral surface 38 of the channel 5 is designed to conform to the inner wall 29 of the aperture 28 in FIG. 1 radially inward during compression of the spring legs 3 and 4.
• the spring leg 3 has an end portion 26 which is angled radially inward along a crease line 22 to which between the end portion 26 and the channel bottom 16 of the channel 5, along a peripheral portion 20 extending leg portion.
• the spring leg 4 has an end portion 27 angled along a bend line 25 on the inside 37 of the channel 5, which is designed to spring radially inwards along the bend line 25.
• the end sections 26 and 27 can thus be snuggled against the inner wall 29 in each case when the press-fit contact 1 shown in FIG. 1 is pressed into the opening 28.
• the end portion 26 is formed along a peripheral portion 21, and the end portion 27 of the leg 4 is formed along a peripheral portion 19. Between the crease lines 24 and 25, the leg 4 extends along a peripheral portion 18. Between the crease lines 23 and 22, the leg 3 extends along the peripheral portion 20th
• the lateral surface 38 forms an arcuate shape along the circumferential sections 19, 18, 17, 20 and 21, which is designed to form a circular arc shape when the press-fit contact is pressed into the opening 28 and thus to be attached to the circular opening 28, in particular the inner wall 29. gene.
• the channel 5 is formed without undercuts in this embodiment, so that the spring legs 3 and 4 - in particular on the inner wall 37 of the channel 5 - in the non-pressed state of the channel extending parallel to each other, or V-shaped.
• the press-fit 1 can be advantageously produced by means of only one punching and / or embossing process of a metal blank.
• FIG. 3 shows the press-fit contact 1 already shown in FIG. 1 in the region of the longitudinal section 2, along the section line 31.
• FIG. 3 shows the aperture 28 already shown in FIG. 1, wherein the channel 5 of the press-fit contact 1 makes electrical contact with the inner wall 29 of the aperture 28 on a circumferential section 39.
• the length of the peripheral portion 39 corresponds to a sum of the peripheral portions 19, 18, 17, 20 and 21 of the channel 5 in FIG. 2.
• the spring legs 3 and 4 are radial to the diameter 35 after insertion into the aperture 28 of the circuit carrier 30 Fed in towards the longitudinal axis 32 towards. In this case, the lateral surface 38 contacts the inner wall 29 on the peripheral portion 39.
• the spring leg 4 is compressed when pressed into the opening 28 on the inner wall 37 of the channel 5 along the fold lines 22 and 23 radially inwardly.
• the lateral surface 38 can thereby conform smoothly to the cylindrical inner wall 29 while forming a circular arc shape.
• the spring leg 3 is compressed to nestle against the inner wall 29 along the fold lines 24 and 25 radially inwardly.
• FIG. 4 shows an opening 40 whose diameter 41 is smaller than the diameter 35 of the opening shown in FIGS. 1 and 3
• the aperture 40 has an inner wall 42, which for
• the spring legs 3 and 4 are each along the fold lines 22 and 23 or 24 and 25 in comparison to the breakthrough shown in Figure 3 28 still further compressed radially inward.
• the lateral surface 38 can smoothly cling to the inner wall 42 along the circumference 39.
• the channel 5 is designed to roll radially inwards from the U-shape shown in FIG. 2 in the expanded state, that is to say not pressed in, when pressed in to form a C-shape shown in FIGS. 3 and 4.
• the channel has thereby reduced its diameter in the expanded state to the diameter 35 and 41 in the pressed state.
• the lateral surface 38 is designed to maintain a circular-arc-shaped cross-section of the lateral surface 38 in the spring-loaded state of the spring legs 3 and 4.
• FIG. 5 shows the press-fit pin 43 already shown in FIG. 1 in a longitudinal section along the longitudinal axis 32.
• the channel 5 has a channel bottom 16 already shown in FIG.
• the channel bottom 16 has in the region of the longitudinal section 6 to the end 36 increasing thickness.
• the channel bottom in the longitudinal section 7 has a convex curvature 46 in this embodiment.
• a bottom thickness 49 of the channel bottom 16 increases on the longitudinal section 7 to the neck of the press-fit pin 43 formed on the longitudinal section 8.
• the convex curvature causes a force curve, which is shown below in FIG. 6, to be weaker at the end of the press-fitting process when being pressed into an opening, such as the opening 28 in FIG.
• the channel bottom 16 may in another embodiment - shown in phantom - have a straight rising shape, which causes a uniform increase in force during pressing.
• the channel bottom 16 may in another embodiment - shown in phantom - have a concave shape 47, which causes a uniform increase in force during pressing.
• a thickness 49 of the channel bottom 16 -for example in the middle-of the longitudinal section 7 is greater than a thickness 50 of the channel bottom 16 in the region of the longitudinal section 2.
• FIG. 6 shows a diagram 51 with an abscissa 52 and an ordinate 53.
• the abscissa 52 represents a press-fit path of the press-fit pin 43 shown in FIGS. 1 and 5 along the longitudinal axis 32, in particular in a linear representation.
• the contact region, formed by the longitudinal section 2, is arranged in the aperture 28 in FIG. 1 after being pressed in, wherein the spring legs 3 and 4 press radially outwardly against the inner wall 29 of the aperture 28 in FIG.
• the ordinate 53 represents a press-in force for pressing the contact pin into the opening 28 as a function of the press-in path, in particular in a linear representation. Shown is also a curve 54, which represents a press-in force for pressing the contact pin 43 into the opening 28 as a function of the press-fit path along the longitudinal axis 32.
• a path portion 55 of the curve 54 has a force increase 56, which is caused by the bulge 46 in Figure 5.
• the force increase 56 is weaker towards an end 60 of the press-fit path along the longitudinal axis 32 of the press-fit pin 43 than at the beginning of the press-fit path.
• the force for press-fitting the press-fit pin 43 with the mold 47 increases uniformly according to the force increase 57 along the press-fitting path.
• the force increase 58 corresponds to the convex shape 48 of the channel bottom 16 on the longitudinal section 7 and is gradually increasing along the press-in path, and rising more towards the end.
• a path portion 61 of the curve 54 corresponds to an insertion of the end portion 15 in the opening 28, whereby at an initial radial Abwinkein the spring legs 3 and 4, a large increase in force along the Einpressweges is caused, which by the longitudinal section 2 towards decreasing thickness of the channel bottom 16 the longitudinal section 6 is smaller.
• the force profile during the pressing of the press-fit pin 43 is thus dependent on a thickness profile of the channel bottom 16 of the channel 5 along the longitudinal axis 32 and can be adjusted over the thickness profile of the thickness of the channel bottom 16.
• the curve 59 represents a force curve of a press-in pin with a uniform bottom thickness and / or leg length. Visible is the force drop towards the end 60 of the press-in path.

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• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Coupling Device And Connection With Printed Circuit (AREA)
• Measuring Leads Or Probes (AREA)
• Multi-Conductor Connections (AREA)

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Applications Claiming Priority (2)

Publications (1)

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• 2015
  • 2015-01-14 DE DE102015200491.0A patent/DE102015200491A1/de not_active Withdrawn
  • 2015-12-22 CN CN201580073151.2A patent/CN107112663B/zh active Active
  • 2015-12-22 WO PCT/EP2015/080995 patent/WO2016113089A1/de active Application Filing
  • 2015-12-22 EP EP15816191.9A patent/EP3251182B1/de active Active
• 2016
  • 2016-01-14 FR FR1650284A patent/FR3031630A1/fr active Pending

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