EP0793301A1 - Ressort de contact plat - Google Patents

Ressort de contact plat Download PDF

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Publication number
EP0793301A1
EP0793301A1 EP97103286A EP97103286A EP0793301A1 EP 0793301 A1 EP0793301 A1 EP 0793301A1 EP 97103286 A EP97103286 A EP 97103286A EP 97103286 A EP97103286 A EP 97103286A EP 0793301 A1 EP0793301 A1 EP 0793301A1
Authority
EP
European Patent Office
Prior art keywords
contact
flat spring
lamellae
legs
leg
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.)
Withdrawn
Application number
EP97103286A
Other languages
German (de)
English (en)
Inventor
Roland Dipl.-Ing. Birnbaum (Fh)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TE Connectivity Solutions GmbH
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0793301A1 publication Critical patent/EP0793301A1/fr
Withdrawn legal-status Critical Current

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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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/10—Sockets for co-operation with pins or blades
    • H01R13/11—Resilient sockets
    • H01R13/113—Resilient sockets co-operating with pins or blades having a rectangular transverse section

Definitions

  • the invention relates to a flat spring contact with a box-shaped plug contact housing with a base spring formed from lamellar upper and lower contact legs, which contact legs are arranged on the plug contact housing at a distance from each other and resiliently connected to one another or to one between them with their converging free ends provided with receiving lips Apply the inserted knife contact, as well as with a spring and with receiving means for the electrical conductors to be connected
  • Flat spring contacts for transmitting electrical power or electrical signals are generally known. They are usually manufactured as a sheet metal stamped and bent part and have a box-shaped contact housing, on which one end of connection elements for an electrical conductor is formed and the other end opposite flat contact springs with bent free ends, which form a receiving opening for receiving an intended one flat counter contact.
  • each lamella contact is provided with an over-spring which is intended to increase the contact force of the lamella contact springs and, moreover, is to prevent their expansion during operation.
  • the increase in the closing force of the contact springs and thus their contact force fulfills the intended purpose, but the increased contact force leads to a more difficult handling of these connectors, because despite the existing locating lips, which favor the attachment of the relevant counter-contact, the insertion of the respective counter-contacts is correspondingly more difficult due to the increased closing force of the spring contacts which are additionally acted upon.
  • each lamella contact has a cross-section that is curved on one side toward the contacting side, so that the inserted mating contact is contacted by the surface of the bulge during operation.
  • At least one of the upper or lower contact legs have integrally formed spacers on the opposite leg surfaces, which are supported on the opposite contact leg.
  • the opposing leg surfaces of the contact legs are held at a distance defined by the respective spacer, so that a corresponding pre-opening of the contact blades is established.
  • the spacers are designed as tabs that are angled away from the contact limbs and rest with the free end on the opposite contact lamella.
  • the tabs which are preferably angled in a Z-shape, are located on the long sides of the contact spring.
  • Each contact plate has only one spacer, while a support surface is formed on the contact plate opposite the spacer, on which the spacer is supported.
  • An advantageous development of the invention is further characterized in that a spacer is also arranged on one of the two contact lamellae of the contact spring according to the invention, that is to say at half the width.
  • This central spacer is also designed as a tab angled out of the contact lamella, which is supported on the opposite contact lamella in the same way as the outer spacers and thus equalizes the opening width of the pre-opening of the contact lamellae.
  • the central spacer serves as a centering for a knife-like counter-contact to be inserted into the contact spring, which has an elongated recess in the region of the spacer, parallel to its longitudinal axis, into which the central spacer engages.
  • the contact legs are kept at a distance with the aid of the spacers for the pre-opening of the contact lamellae, preferably at a distance between 0.25 and 0.6 mm, in particular at a distance of 0.43 mm, between the contact legs or between their contact lamellae consists.
  • the spacers formed on the outer contact lamellae of the upper and / or lower contact legs also serve as side guides, which each form a stop on the side of the contact surface formed by the contact lamellae for mating contact pieces to be inserted.
  • the spacer formed on one of the middle contact lamellae of the upper and / or the lower contact legs advantageously serves as a centering for a mating contact piece to be inserted.
  • the contact lamellae are also provided with local bulges which, in the rest position, are each at a distance from the opposite contact leg in accordance with the aforementioned opening of the contact lamellae.
  • each contact lamella has a defined support or contact point for the knife-like counter contact to be introduced, regardless of a possible inclination of the contact lamella in question. In this way, perfect contacting with the mating contact is guaranteed at any time.
  • the bulges are arranged at a distance from the end edge of the contact lamellae. Their height can be equal to or less than the thickness of the respective intended counter contacts. The insertion of the mating contacts is facilitated by the spacers mentioned, which are arranged on the contact legs, since these cause the desired opening of the contact legs.
  • the bulges on the contact lamellae on the contact legs located opposite each other are arranged in the same position, so that the bulges lie opposite one another.
  • four, namely two middle and two outer contact lamellae are provided with separating joints arranged therebetween, wherein the respectively adjacent outer and inner contact lamellae can be U-shaped with separating joints open on the plug side, with the rear end facing away from the plug-in side Cross bars for connecting the contact blades.
  • a preferred embodiment of the invention provides that the joint width of the joint between the middle contact lamellae of the upper contact leg is smaller than the joint width of the joint between the middle and the outer contact lamellae, while the middle joint in the lower contact leg is wider than that in the upper contact leg .
  • adjacent contact lamellae of a contact leg can be connected to one another by means of a connecting web.
  • the connecting web is preferably arranged at the end of the contact lamellae.
  • the connecting web of the middle contact lamellae of the lower contact legs can advantageously terminate here with the end edge of the contact lamellae.
  • Another advantageous embodiment of the invention provides that the connecting web provided on the plug-in side of the middle contact lamellae of the lower contact legs is curved in an arc shape, while the remaining rear connecting webs of the inner or middle contact lamellae are each flat with the outer contact lamellae of the contact legs.
  • the flat spring contact according to the invention and its refinements and developments is made as a stamped and bent part from electrically conductive flat material.
  • the outer contact lamellae are each integrally connected to the box-shaped plug contact housing, and the distance between the contact legs is bridged laterally by side walls of the plug contact housing.
  • Fig. 1 is a flat spring contact 10 according to the invention in plan view with a box-shaped contact housing 12 with molded on the plug contact side legs 14, 16, which are each provided with receiving lips 15 on the plug side, and with a connection on the opposite side, in a known manner as a crimp contact trained conductor connection 18 for an electrical conductor to be connected, not shown here, which serves as a connector, preferably for low-voltage plug connections.
  • the invention aims primarily at the configuration of the contact legs 14, 16 and at their pre-opening 15, so that this will be discussed in particular in the following.
  • the upper contact legs 14 are formed from paired inner contact lamellae 20 and outer contact lamellae 22, the outer contact lamellae 22 being laterally integral with the contact housing 12 are connected.
  • the outer and inner contact lamellae 20, 22 of the upper contact limbs 14 each form a U which is open towards the plug side, the inner contact lamellae 20 being connected to the outer contact lamellae 22 by means of a broad crosspiece 24.
  • a parting line 26 the width of which is less than the distance of the inner contact lamellae 20 from the outer contact lamellae 22.
  • This configuration offers the advantage of exceptional flexibility of the contact lamellae 20, 22 of the upper contact leg 14, so that practically every knife-like counter contact introduced is reliably contacted.
  • the production of the bulges is not a problem in the course of the manufacture of the flat spring contact 10, which is provided as a stamped, bent and pressed part, from flat material, preferably sheet metal from electrically conductive material, since the bulges 28, unlike in the case of contact lamellae with a bulge cross-section, already, for example, when punching out the Sheet pre-product can be generated by a corresponding stamp.
  • Spacers 30, which are formed on both sides of the longitudinal sides of the lower contact leg 16 and are indicated in FIG. 1 only by dashed lines, are used to set the pre-opening of the contact legs 14, 16 provided according to the invention. They are designed as approximately Z-shaped angled tabs, which are supported with their free end on associated support surfaces 23 on the upper contact lamella 22.
  • the side view of the flat spring contact 10 according to FIG. 1 shown in FIG. 2 leaves one of the so-called spacers 30, which is formed in the outer contact lamella 32 of the lower contact leg 16 from the side.
  • These spacers 30 serve, as the name suggests, on the one hand to set a distance between the contact legs 14, 16 according to the pre-opening 15 according to the invention and on the other hand to guide and in particular the lateral limitation for the respective mating contacts, one of which is exemplary in FIGS. 4a and 4a 4b is shown.
  • FIG. 3 the lower contact leg 16 of the flat spring contact 10 according to FIG. 1 can be seen in partial section.
  • inner contact lamellae 32 and outer contact lamellae 34 form the contact leg 16, wherein between the individual contact lamellae 32, 34 there is in each case an equally wide parting line 33, into which a Z-shaped angled spacer arranged on the right inner contact lamella projects.
  • the width of the spacer 31 is corresponding to the wide parting line greater than the parting line 26 between the inner contact lamellae 20 of the upper contact leg 14, on which the spacer 31 is supported, whereby the two contact legs 14, 16 are kept at a distance from each other and a defined opening of the Contact blades 20, 22, 32, 34 is ensured.
  • the inner contact lamellae 32 are connected to one another here by means of a bow-like cross piece 36, in order to ensure the basic stability of the flat spring contact required for reliable contacting of a mating contact. Without this crosspiece, the resilience of the individual contact lamellae 32, 34 could lead to an undesired separation of the connecting parts, namely flat spring contact 10 and mating contact, which must definitely be excluded.
  • the thickness and the width of the cross piece determine the deflection of the inner contact lamella 32 of the lower contact leg 16, that is to say the smaller the cross section is, the more flexible the arrangement of the contact blades 32.
  • the contact lamellae 32, 34 of the lower contact leg 16 are also each provided with bulges 38, which are both designed in the same way as the bulges 28 on the upper contact leg 14, namely likewise preferably in the form of a dome, and also arranged in a manner corresponding to the position, in particular from the partial section according to FIG 3 emerges from the cutting line on the right inner contact lamella 32.
  • the bulges fulfill another purpose which is pursued with the invention. Due to the distance between the contact legs 14, 16 generated by the bulges, a pre-opening of the contact legs 14, 16 is effected, which facilitates the insertion of a mating contact without the contact force of the contact legs 14, 16 and thus the contact security being reduced thereby.
  • 4 finally shows a knife-like plug contact 40 which can be provided as a mating contact for insertion into the flat spring contact 10 according to the invention.
  • 4a shows a plan view of the knife contact 40;
  • 4b shows a cross section through the knife contact 40 along section line IV-IV.
  • the knife contact according to FIG. 4 a has two contact knives 42, the end edge of which is chamfered, in order to make it easier to insert into the flat spring contact 10.
  • a separation joint 44 is also provided between the contact blades 42. In cooperation with the contact blades 20, 22, 32, 34 and the spacers 30 of the flat spring contact, a pre-centering is effected for the contact knife 40.
  • the contact knives are preferably cut out transversely to the rolling direction of the flat product in question, for example sheet metal. Lugs can be on the long sides of the contact knife 46 be formed, which are used to fasten the contact blades 40 in an insulating housing.
  • the contact blades are also made of electrically conductive material, the contacting surfaces preferably being able to be provided with a coating of noble metal, for example gold or tin.
  • FIG. 5 shows a partial longitudinal section through the contact spring 10 according to the invention along the section line V-V in FIG. 1, in which the middle spacer 31, which is angled approximately Z-shaped from the contact lamella 32, can be seen in longitudinal section. There is a distance between the two contact legs 14, 16, which represents the pre-opening 15 according to the invention.
  • a further task which the middle spacer 31 has to do concerns the guiding and insertion limitation of the respective counter contact, as is shown in a top view in FIG. 4 a.
  • the middle spacer 31 serves both as a centering by engaging in the longitudinal slot 44 formed in the center of the counter-contact and at the same time preventing further insertion by contacting the slot base.
  • the middle opening of the connected inner fins 32 of the lower contact leg 16 leads to the lifting of the separate contact fins of the upper contact leg 14. Also, due to the curved design of the front crosspiece 36 of the inner contact fins 32 of the lower contact leg 16, the width thereof is quasi variable, so that contact knives also larger dimensional tolerances than can be used as a counter contact since then.
  • the provided bulges 28, 38 ensure defined support points at the respective embossing points, that is to say at the respective contact points.
  • the inserted counter contact is also pre-centered, since the centering does not take place over the tips of the contact knife, but over its flanks, which serve as contact surfaces. This increases the usability and usability of the flat spring contact 10 according to the invention.
  • the outer contact lamellae 22, 34 can advantageously be larger than the inner contact lamellae 20, 32, while the parting lines 28, 33 are unchanged. Furthermore, it can be advantageous with correspondingly wide flat spring contacts, instead of the embodiment described above, to provide more than two inner and two outer contact lamellae 20, 22, 32, 34, which are each provided with bulges and thereby obtain the desired flexibility, on the one hand for easy handling and on the other hand for safe contacting is to be seen as an advantage according to the invention. This means that practically any required width of plug contacts can be implemented without loss of plug security.

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  • Coupling Device And Connection With Printed Circuit (AREA)
EP97103286A 1996-02-28 1997-02-27 Ressort de contact plat Withdrawn EP0793301A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19607525 1996-02-28
DE19607525 1996-02-28

Publications (1)

Publication Number Publication Date
EP0793301A1 true EP0793301A1 (fr) 1997-09-03

Family

ID=7786680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97103286A Withdrawn EP0793301A1 (fr) 1996-02-28 1997-02-27 Ressort de contact plat

Country Status (1)

Country Link
EP (1) EP0793301A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108711537A (zh) * 2018-08-09 2018-10-26 苏州安来强电子科技有限公司 直流接触器的动触点结构及动触点系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1219360A (fr) * 1958-12-24 1960-05-17 Nouveaux contacteurs pour circuits imprimés
DE9202365U1 (fr) * 1992-02-24 1993-06-17 Siemens Ag, 8000 Muenchen, De
US5281175A (en) * 1993-03-30 1994-01-25 General Motors Corporation Female electrical terminal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1219360A (fr) * 1958-12-24 1960-05-17 Nouveaux contacteurs pour circuits imprimés
DE9202365U1 (fr) * 1992-02-24 1993-06-17 Siemens Ag, 8000 Muenchen, De
US5281175A (en) * 1993-03-30 1994-01-25 General Motors Corporation Female electrical terminal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108711537A (zh) * 2018-08-09 2018-10-26 苏州安来强电子科技有限公司 直流接触器的动触点结构及动触点系统
CN108711537B (zh) * 2018-08-09 2024-03-19 苏州安来强电子科技有限公司 直流接触器的动触点结构及动触点系统

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