EP2191484B1 - Système électrique de contact à ressort en fil - Google Patents

Système électrique de contact à ressort en fil Download PDF

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Publication number
EP2191484B1
EP2191484B1 EP08801656.3A EP08801656A EP2191484B1 EP 2191484 B1 EP2191484 B1 EP 2191484B1 EP 08801656 A EP08801656 A EP 08801656A EP 2191484 B1 EP2191484 B1 EP 2191484B1
Authority
EP
European Patent Office
Prior art keywords
contact
holding element
contact system
limb
spring
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.)
Active
Application number
EP08801656.3A
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German (de)
English (en)
Other versions
EP2191484A1 (fr
Inventor
Karl Heinz Arndt
Thomas Freyermuth
Artur Wiese
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.)
Eaton Intelligent Power Ltd
Original Assignee
Eaton Industries GmbH
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 Eaton Industries GmbH filed Critical Eaton Industries GmbH
Priority to PL08801656T priority Critical patent/PL2191484T3/pl
Publication of EP2191484A1 publication Critical patent/EP2191484A1/fr
Application granted granted Critical
Publication of EP2191484B1 publication Critical patent/EP2191484B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H01H1/245—Spring wire contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0006—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches
    • H01H11/0012—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches for converting normally open to normally closed switches and vice versa

Definitions

  • the invention relates to an electrical contact system, in particular for low voltage, with an access contact and with at least one outgoing contact. It comprises a wire contact spring, which is held centrally by a holding element in the contact system. On both sides of the retaining element, two straight-extended contact legs spread out with approximately the same length. The contact legs clamp without applying an elastic bias between them an obtuse opening angle.
  • wire cross contacts such as in DE 102004012777 B3 or in DE 7721796 U1 be proposed.
  • the contact force acts only at a very small point of contact and in this way foreign layers are easier to pierce.
  • Slip contacts rub on the pad to remove the debris or oxides, but they also create undesirable abrasion and dig into the material at one point.
  • An improvement for the life bring here, for example sliding contacts with a tangential contact, as in DE 19817796 C2 or DE 1489080 A described.
  • a combination of contact spring with pins as a cross contact with tangential friction movement at the contact point can be found in the contact arrangement of an electromagnetically actuated relay DE 1071837 B ,
  • a contact arrangement for extra-low voltages with a spring wire which is wound in less than one turn around a first contact pin and extended for engagement with a first contact pin by a first wire leg
  • the spring wire has a second, fixed wire leg for elastically bringing the first wire leg into contact with a second contact pin.
  • a third contact pin is near the spring wire and on the second Contact pin provided opposite side, being brought by pressure on the spring wire at a position between the first and the second contact pin of the spring wire in elastic contact with the third contact pin.
  • the contact system is only designed for very small switching strokes.
  • the contact system is not suitable because the spring wire with less than a number of turns on the support member will be claimed beyond its elastic limit, and thus would have a very limited life ,
  • a push-button switch comprising a switch body, a pressing member, and a metal elastic member having first and second arms. The ends of the first and second arms are located in a first and a second recess of the switch body. A first contact is arranged in the first indentation. A second contact is fixed outside the second indentation. The two contacts are connected to two terminals of the switch. Depression of the first and second arms causes contact between the first and second contacts.
  • the core of the invention is formed in a special shape and storage contact spring.
  • the contact spring of the contact system is held centrally by a holding element in the contact system.
  • two, straight-stretched contact legs spread out with approximately the same length, wherein the contact legs clamp between them an obtuse opening angle without applying an elastic bias.
  • a first contact leg is applied against an access contact formed as first support and a second contact leg is applied against a second insulating support by increasing the opening angle and generating a bias voltage.
  • Adjacent to the second Contact leg is arranged at least one outgoing contact.
  • the contact system can be designed as an opener or as normally open or as a changeover switch. This is achieved by the arrangement of outgoing contacts on the side of the second contact leg.
  • the arrangement according to the invention is used for the low-current range, where it it is important to reliably switch small voltages and small currents over many load cycles. Investigations of the arrangement have shown that the contact system reaches a contact reliability of well over 1 million.
  • the contact legs should preferably be of the same length so that they come symmetrically to the plant to the associated contacts. Both contact legs are brought to the deflection and thereby released from contact and brought into contact with another contact.
  • the contact legs are each fixed to a support bearing, one of which is provided as a first outgoing contact and the switching positions are achieved by changing the opposite contact of the first outgoing contact leg of the contact spring between an opening outgoing contact and a closing outgoing contact.
  • a contact leg of the contact spring is always on a pole-contact pin (the "access contact") and the other contact leg is fixed to a support bearing (for example: a nose or a projection in the plastic housing).
  • the 'working' contact leg is moved between a normally closed contact pin and a normally open contact pin.
  • the holding element is designed as a perpendicular projecting from the actuator pin or pin.
  • the contact spring is wound around the perpendicular projecting from the actuating element (actuating plunger) pins with at least one turn.
  • the holder of the contact spring on the actuating element is in the form of a pin, such that slipping of the contact spring is prevented by the actuating element.
  • the installation of the contact spring is done with bias.
  • the bias and the restoring force generated during actuation effect a positive pressing of the spring coils on one side of the pin.
  • the number of turns together with the spring characteristic of the spring wire determines the spring constant of the contact spring. Due to the structural design and the appropriate material selection, the required contact force can be securely applied to each contact points with the contact spring. Furthermore, with the contact spring and a secure through-stroke of the actuating plunger are executed.
  • the two contact legs of the contact spring Due to the linear movement of the actuating plunger with a journal bearing of the contact spring coils, the two contact legs of the contact spring have a tangential friction and sliding movement on the cylinder outer surface of the fixed contact pins. Dirt particles or oxides are removed at the contact points by the movement; There is a self-cleaning of the respective contact points.
  • the mechanical, constructive and material training of the contact system should preferably be such that the largest possible stroke (> 5 mm) on the actuating element (actuating tappet) and Hubuntersburg the change-over contact is present.
  • the contact spring By a positive retention of the contact spring on the actuating plunger, the contact spring also provides the return force for the actuating plunger. Another element for returning the actuating plunger to its home position is not necessary.
  • the material of the contact spring is spring steel, which may have a noble metal coating.
  • the spring steel can continue to be designed as polished, stainless steel spring steel. Its coating may be made of precious metal (e.g., gold or rhodium).
  • the contacts, or the pins should be made of conductive material, such as pins made of wire, carbon fibers, graphite, graphite with Cu impregnation, silver or a silver alloy.
  • Metallic contacts may be provided with a coating of nickel (with good corrosion resistance).
  • Metallic outgoing contacts can be soldered on or in the wiring plane, whereas carbon contacts are incorporated with a solderless fastening technique. The latter can be done by pressing into a conductive foil and additionally secured with conductive adhesive or conductive ink.
  • the material pairings between contact points on the contact spring and the respective associated contacts can be chosen so that existing thermal stresses are compensated.
  • the thermoelectric voltages are compensated.
  • a different material pairing usually has better friction coefficients and sliding properties.
  • At least one contact leg can be extended beyond the distance between the holding element and the support or contact point addition.
  • the protruding extension is bent into a U and bent back parallel to the contact leg.
  • at least one contact leg is formed as a double, juxtaposed spring wire. Due to the doubling of the at least one contact leg, a double contact (also known as H contact) is produced at the contact contact associated with the contact leg.
  • the described design has the advantage that you get a double contact system with quasi double contact safety.
  • the contacts of the assembly are formed as pins and fixed on a mounting or wiring plane.
  • the contacts may be soldered in the wiring plane or otherwise secured there (eg, by solderless attachment technique).
  • the contact system can be doubled in an electrical switch housing.
  • a first contact system can be arranged above the fastening plane and a second contact system can be arranged below the fastening plane.
  • an electrical connection can be made with electronics also arranged there with a printed circuit board or the MID technology.
  • a double trained contact system may be provided with an electronic control such that via a mutual control of the pole pins, once for the first contact system and the other time for the second contact system, is detected and controlled by the electronics, which of the two actuating tappet straight is pressed.
  • Such a changeover switch offers the advantage of additional query security and error detection.
  • FIG. 1 Both side view and top view are shown on a contact system which functions as a changeover switch.
  • an access contact 20 and two outgoing contacts 22, 24 are arranged on an attachment or wiring plane 51.
  • solid contacts serve (in the form of contact pins) simple round wires (or rods).
  • the moving contact is formed by the contact spring 10 with its two straight-extended contact legs 14, 16.
  • Contact pins and contact spring are arranged at an angle of 90 degrees to each other.
  • the contact spring is held centrally by a holding member 32 having a plurality of turns, which is arranged on an actuating plunger 30 as a vertically projecting pin.
  • the contact legs 14, 16 spread apart on either side of the support member 32 with approximately the same length, wherein the contact legs 14, 16 span without applying an elastic bias voltage V between them a large blunt opening angle W. Upon actuation of the actuating plunger 30, the contact legs are pushed beyond the angle of 180 ° addition. As can be seen from the figure, the contact system also allows a certain amount of movement of the contact movement.
  • the first contact leg 14 is against the access contact 20 and the second contact leg 16 is applied against the insulating support 26 by increasing the opening angle W.
  • the support 26 may be formed as a housing projection or as a round pin.
  • First 22 and second outgoing contact 24 are disposed in the vicinity of the second contact leg 16, and come into alternation with the contact leg 16 in contact when the actuating plunger 30 is activated.
  • the contact system - by omitting the contact 24 - even a departure contact 22 may have.
  • the contact system is to be regarded as normally closed or normally open.
  • the contact system is designed as a normally closed contact, if an outgoing contact (for example 22) lies on the side of the second contact leg 16 facing the holding element 32 and is touched by the second contact leg 16 in the rest position of the holding element 32.
  • the contact system is designed as a make contact if a feeder contact (for example 24) lies on the side of the second contact leg 16 facing away from the holding element 32 and is not touched by the second contact leg 16 until the holding element 32 is actuated.
  • Fig. 2 the contact legs 14 and 16 have a modified form. Both contact legs are extended beyond the distance between the holding element and the support or contact point addition. The protruding extension is bent to a U and bent back parallel to the contact leg. Each contact (20, 22, 24) is thus contacted twice by the U-shaped contact legs (14 'and 16'). There is a double contact (also called H contact).
  • two contact systems are each attached to a wiring plane (51, 51 ').
  • the wiring level can (as in Fig. 1 ) a continuous plane, or as in FIGS. 3A and 3B be interrupted.
  • the training depends on the structure of the switch housing, which is not shown in detail.
  • the contact systems are operated by separate actuators (32, 32 ') and each have a contact spring 10 and 40.
  • the contacts are soldered in the wiring plane, wherein in the upper part of the figure, the contact pins once to the front of the wiring level 51 protrude and the contact pins of the second contact system are formed on the back of the wiring plane 51.
  • the contacts 22 and 24 may be at the same electrical potential, so be guided solidly through the wiring plane 51 therethrough.
  • the access contact on the front side (20) alone is electrically separated from the access contact (20 ') on the rear side of the wiring plane 51.
  • the contact pins for NC (eg 22) and NO (eg 24) are used by both contact springs (10, 40) as a counter-contact, the two pole pins (20 and 20 ') contact only once the contact spring in the first contact system and on the other hand, the contact spring in the second contact system housing.
  • the contact systems are on the same side of the wiring plane 51 '.
  • the details and reference numerals of the two sub-figures 3A, 3B correspond to the previously discussed figures, so that these details will not be described repeatedly.
  • an electronics can be used for monitoring, which checks which of the two plungers has just been operated and which not.
  • the changer offers the advantage of an additional query security of the plunger position.
  • An electronic system can evaluate both signals and can give a message as to whether the plunger has been pressed or whether a contact error has occurred.
  • the electronics of the contact systems can continue to be integrated. This is immediately obvious, since small electronic circuits suitable for low-voltage applications can be applied and integrated by means of MID technology or in the form of a printed circuit board. For the integration of the electronics can contribute further, if in the wiring level LED displays (for switch positions) and plugs for electronic connections, for example, as BUS contacts are additionally integrated.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Push-Button Switches (AREA)

Claims (12)

  1. Système de contact électrique, en particulier en basse tension, avec un contact d'entrée et avec au moins un contact de sortie, comprenant :
    - un ressort de contact (10) qui est constitué d'un fil et qui est maintenu dans le système de contact au centre par un élément de maintien (32)
    - et, des deux côtés de l'élément de maintien (32), deux branches de contact (14, 16) qui s'éloignent sensiblement sur la même longueur, les branches de contact (14, 16) formant ensemble sans application d'une précontrainte élastique (V) un angle d'ouverture obtus (W),
    dans lequel, avec un agrandissement de l'angle d'ouverture (W), une première branche de contact (14) est appliquée contre un contact d'entrée (20) conçu comme premier support et la deuxième branche de contact (16) est appliquée contre un deuxième support isolant (26)
    et un premier contact de sortie (22) est agencé au voisinage de la deuxième branche de contact (16) et le système de contact est conçu conne un contact de repos du fait que le premier contact de sortie (22) se trouve sur celui des côtés de la deuxième branche de contact (16) qui est proche de l'élément de maintien (32) et touche la deuxième branche de contact (16) lorsque l'élément de maintien (32) est en position de repos et le système de contact est conçu comme un contact de travail du fait qu'un deuxième contact de sortie (24) se trouve sur celui des côtés de la deuxième branche de contact (16) qui est éloigné de l'élément de maintien (32) et touche la deuxième branche de contact (16) seulement lors de l'actionnement de l'élément de maintien (32),
    caractérisé en ce que les contacts (20, 22, 24) sont conçus comme des broches de contact et, par le déplacement linéaire d'un coulisseau d'actionnement (30) du système de contact, les deux branches de contact (14, 16) du ressort de contact (10) ont un déplacement de frottement et de glissement tangentiel sur la surface extérieure de cylindre des broches de contact fixes.
  2. Système de contact selon la revendication 1, caractérisé en ce que le système de contact est conçu aussi bien comme un contact de travail que comme un contact de repos du fait que le premier contact de sortie (22) se trouve sur celui des côtés de la deuxième branche de contact (16) qui est proche de l'élément de maintien (32) et touche la deuxième branche de contact (16) lorsque l'élément de maintien (32) est en position de repos et que le deuxième contact de sortie (24) se trouve sur celui des côtés de la deuxième branche de contact (16) qui est éloigné de l'élément de maintien (32) et touche la deuxième branche de contact (16) lors de l'actionnement de l'élément de maintien (32).
  3. Système de contact selon l'une des revendications 1 ou 2, caractérisé en ce que l'élément de maintien (32) est agencé au niveau d'un élément d'actionnement (30) qui peut être déplacé de façon linéaire et qui augmente la précontrainte (V).
  4. Système de contact selon la revendication 3, caractérisé en ce que l'élément de maintien (32) est conçu comme une broche (32) s'éloignant perpendiculairement de l'élément d'actionnement (30).
  5. Système de contact selon l'une des revendications précédentes, caractérisé en ce que le ressort de contact (10) est guidé avec au moins une spire autour de l'élément de maintien (32).
  6. Système de contact selon l'une des revendications précédentes, caractérisé en ce que le matériau du ressort de contact (10) est un acier à ressort et comporte un revêtement en métal précieux.
  7. Système de contact selon l'une des revendications précédentes, caractérisé en ce que les appariements de matériaux entre des points de contact sur le ressort de contact (10) et les contacts de sortie (22, 24) respectivement associés sont choisis par paire de telle sorte que des tensions thermoélectriques qui se créent sont compensées.
  8. Système de contact selon l'une des revendications précédentes, caractérisé en ce qu'au moins une branche de contact (14, 16) du ressort de contact est pliée en U.
  9. Système de contact selon l'une des revendications précédentes, caractérisé en ce que les contacts (22, 24, 24') sont fixés sur un plan de fixation (51) et au moins un système de contact est agencé dans le plan de fixation (51).
  10. Système de contact selon l'une des revendications 1 à 9, caractérisé en ce qu'un premier système de contact est agencé sur l'avant du plan de fixation (51, 51') et un deuxième système de contact est agencé sur l'arrière du plan de fixation (51, 51').
  11. Système de contact selon l'une des revendications 1 à 9, caractérisé en ce que deux systèmes de contact sont agencés sur un côté du plan de fixation (51, 51').
  12. Système de contact selon l'une des revendications précédentes, caractérisé en ce qu'il s'effectue sur le plan de fixation (51) une liaison électrique avec une électronique également agencée là avec une carte de circuits imprimés ou avec la technique MID.
EP08801656.3A 2007-09-22 2008-08-21 Système électrique de contact à ressort en fil Active EP2191484B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08801656T PL2191484T3 (pl) 2007-09-22 2008-08-21 Układ styków elektrycznych ze sprężyną drutową

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710045432 DE102007045432B3 (de) 2007-09-22 2007-09-22 Elektrischer Schaltkontakt
PCT/EP2008/006880 WO2009036859A1 (fr) 2007-09-22 2008-08-21 Systyème électrique de contact à ressort en fil

Publications (2)

Publication Number Publication Date
EP2191484A1 EP2191484A1 (fr) 2010-06-02
EP2191484B1 true EP2191484B1 (fr) 2017-11-22

Family

ID=39938219

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08801656.3A Active EP2191484B1 (fr) 2007-09-22 2008-08-21 Système électrique de contact à ressort en fil

Country Status (4)

Country Link
EP (1) EP2191484B1 (fr)
DE (1) DE102007045432B3 (fr)
PL (1) PL2191484T3 (fr)
WO (1) WO2009036859A1 (fr)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1071837B (fr) * 1956-03-23
US3297973A (en) * 1963-08-30 1967-01-10 Poly Scient Corp Floating-brush contact assembly
US3548137A (en) * 1968-06-20 1970-12-15 Chicago Switch Inc Switch construction
DE2214340C3 (de) * 1972-03-24 1975-12-18 Loewe Opta Gmbh, 1000 Berlin Drucktastenschieber mit parallel zur Kontaktebene relativ zueinander gegen die Federkraft einer Rückstellfeder verschiebbaren Kontaktträgern
US3946185A (en) * 1974-08-21 1976-03-23 Intersil, Inc. Spring wire contact assembly
GB1534704A (en) * 1974-11-25 1978-12-06 Swann D Electric switches
DE7721796U1 (de) * 1977-07-12 1978-10-05 Kodak Ag, 7000 Stuttgart Kontaktschalter an einer photographischen kamera
US4119821A (en) * 1977-09-26 1978-10-10 Stackpole Components Company Normally closed switch
DE2937925C3 (de) * 1979-09-19 1982-04-15 Siemens AG, 1000 Berlin und 8000 München Schalter
DE19817796C2 (de) * 1998-04-21 2001-04-12 Schleifring Und App Bau Gmbh Schleifkontaktanordnung mit verlängerter Lebensdauer
DE19856678C2 (de) * 1998-12-04 2002-01-24 Moeller Gmbh Elektrische Schaltvorrichtung
US6521852B1 (en) * 2002-05-06 2003-02-18 Shin Jiuh Corp. Pushbutton switch
DE102004012777B3 (de) * 2004-03-15 2005-11-10 W.C. Heraeus Gmbh Kontaktkörper, insbesondere für Schaltkontakte sowie Kontaktanordnung mit einem derartigen Kontaktkörper sowie seine Verwendung

Also Published As

Publication number Publication date
EP2191484A1 (fr) 2010-06-02
PL2191484T3 (pl) 2018-10-31
DE102007045432B3 (de) 2009-04-16
WO2009036859A1 (fr) 2009-03-26

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