EP0616352B1 - Interrupteur d'appareil à protection de surintensité du courant intégré - Google Patents

Interrupteur d'appareil à protection de surintensité du courant intégré Download PDF

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Publication number
EP0616352B1
EP0616352B1 EP94103559A EP94103559A EP0616352B1 EP 0616352 B1 EP0616352 B1 EP 0616352B1 EP 94103559 A EP94103559 A EP 94103559A EP 94103559 A EP94103559 A EP 94103559A EP 0616352 B1 EP0616352 B1 EP 0616352B1
Authority
EP
European Patent Office
Prior art keywords
contact
spring
switch
switch according
rocker
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.)
Expired - Lifetime
Application number
EP94103559A
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German (de)
English (en)
Other versions
EP0616352A1 (fr
Inventor
Fritz Krasser
Wolfgang Schmidt
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.)
Ellenberger and Poensgen GmbH
Original Assignee
Ellenberger and Poensgen 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 Ellenberger and Poensgen GmbH filed Critical Ellenberger and Poensgen GmbH
Priority to DE9421886U priority Critical patent/DE9421886U1/de
Publication of EP0616352A1 publication Critical patent/EP0616352A1/fr
Application granted granted Critical
Publication of EP0616352B1 publication Critical patent/EP0616352B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/12—Means for indicating condition of the switch
    • H01H73/14—Indicating lamp structurally associated with the switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/22—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release
    • H01H73/26—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release reset by tumbler
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/04—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrothermal opening
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5833—Electric connections to or between contacts; Terminals comprising an articulating, sliding or rolling contact between movable contact and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H23/00—Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button
    • H01H23/02—Details
    • H01H23/12—Movable parts; Contacts mounted thereon
    • H01H23/16—Driving mechanisms
    • H01H23/20—Driving mechanisms having snap action
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/04—Means for indicating condition of the switching device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/18—Electrothermal mechanisms with expanding rod, strip, or wire

Definitions

  • the invention relates to a device switch with the features of the preamble of claim 1 (DE-A-1 515 533).
  • This device switch The electrical external connections of this device switch are connected to one another by means of two switching elements which are arranged within the insulating housing of the device switch and are connected in series.
  • One switching element is a contact bridge that can be moved between its contact closing and contact opening positions.
  • the contact bridge is acted upon by a manually operated rocker switch that is pivotally mounted on the insulating housing, and can thereby interrupt the circuit. In this way, the device switch can be switched on and off manually.
  • the second switching element is effective as overcurrent protection. It is designed as a thermally releasable contact spring and also interrupts the circuit when it is activated. Naturally, the thermally induced switching movement of the contact spring to interrupt the circuit is very slow. The interruption of the circuit, especially in the case of larger currents, requires fast switching movements of a switching element.
  • the overcurrent protection of a device switch in US Pat. No. 4,528,538 and in US Pat. No. 5,079,530 is implemented by a so-called starter. Starting works are known from W. Krause, construction elements of precision mechanics, p. 521 ff., 2nd edition, Kunststoff-Vienna, Carl-Hanser-Verlag, 1993, ISBN 3-446-16530-4 .
  • the starter mechanisms used in US 4,528,538 and US 5,079,530 each contain an energy store in the form of a spring.
  • the thermal energy generated due to the overcurrent is stored as mechanical energy in the spring.
  • the stored energy is released at a specific point in time, which depends on the amount and the duration of the overcurrent. This converts slow switching movements into sudden switching movements.
  • the contact spring itself has a very complicated structure in order to prevent the circuit from being automatically closed again by the contact spring after the overcurrent trip has taken place.
  • the complicated structure makes the contact spring very susceptible to faults and therefore also affects the functional reliability of the device switch.
  • due to the complicated structure of the contact spring only slight force transmissions occur between the individual components. In its function as a switching element with a closed circuit, the contact spring therefore only generates a low contact force.
  • the design of the rocker switch is complicated to achieve a coupling of the rocker switch with the contact spring.
  • a generic device switch is known from DE-A-1515533.
  • this device switch has a contact spring which is electrically connected in series, can be thermally triggered and acts as an overcurrent protection.
  • a contact bridge is electrically connected in series in the consumer circuit, which is moved by means of a rocker switch pivotally mounted on the device housing between the contact closing and contact opening positions for closing and interrupting the consumer circuit.
  • the contact spring consists essentially of a pivotably mounted, arc-shaped spring element and a bimetal strip articulated on the spring element. In the contact position of the contact spring, the spring element is mechanically prestressed in the direction of the contact position in order to create a constant contact pressure.
  • the entire contact spring reaches its open position.
  • the spring element is mechanically relaxed, ie the contact spring is mechanically stress-free in the open position.
  • a disadvantage of this known device switch is that the contact spring is transferred from a state that is biased in the direction of the contact position to a mechanically stress-free state when an overcurrent is triggered. As a result, the acceleration forces of the contact spring in the direction of the open position remain relatively low. The triggering process takes a long time. In addition, a sufficient mechanical tension of the bimetal strip for the triggering process builds up very slowly.
  • the invention has for its object to prevent an automatic, renewed closing of the circuit of the device switch described above easier and safer. This object is achieved by the combination of features of claim 1.
  • the contact spring is held in its open position after overcurrent tripping without additional components.
  • This is accomplished solely by the special structure of the contact spring with a mechanical preload.
  • the dead position of this toggle mechanism lies between the contact position and the open position. That with such a starter automatic jumping between contact position and open position is restricted to the extent that the contact spring can only jump automatically from its contact position into the open position.
  • the contact spring is already biased in the direction of its open position from the outset. The contact spring is therefore constantly trying to get into its open position.
  • the forces generated by the mechanical preload are greater than the forces that hold the contact spring in its contact position.
  • the contact spring tilts into its open position at this moment. Due to its mechanical preload, the contact spring remains reliably in this position without additional components to hold it in place.
  • the mechanical preload of the contact spring in its open position can only be counteracted by swiveling the paddle.
  • the rocker switch is swiveled in the tilting direction of the contact spring.
  • the same directions of movement of the rocker switch and contact spring on the one hand support the space-saving construction of the device switch.
  • the rocker switch has the effect of a switch button that conventionally acts on the toggle mechanism of an electrical switch without any significant additional effort.
  • the contact bridge is simultaneously transferred from its contact closing to its contact opening position. As a result, the circuit of the device switch remains interrupted until the rocker switch swings again.
  • Claim 2 takes into account a space-saving arrangement of rocker switch, contact bridge and contact spring. This supports the small design of the device switch.
  • the force transmission path from the rocker switch to the contact spring is smaller than to the contact bridge. This takes into account that the switching rocker that is actually provided for pivoting the contact bridge also has a sufficient force component to act on the contact spring during its pivoting movements. The contact spring is therefore reliably returned to its contact position by the rocker switch.
  • the space requirement of the device switch for its switching mechanism is further reduced.
  • the same planes of motion of the three lever-like components also enable power transmission with great efficiency. This supports the reliable functioning of the device switch.
  • the contact spring is fixed mechanically stable and at the same time sufficiently spring movable.
  • the electrical contact between the contact spring and the circuit to effect movement contact is attached to the free end of the contact spring.
  • the movement contact has the greatest possible swivel path between the contact position and the open position of the contact spring.
  • the largest possible swiveling path alone ensures a very effective galvanic separation between the movement contact of the contact spring in its open position and the contact point of the circuit solely through the air gap. Accidental contacts between the moving contact and the circuit are very effectively prevented.
  • the line web which is clamped shorter than the spring webs, enables the contact spring to be mechanically pretensioned in a technically simple manner in the direction of its open position.
  • Claim 8 relates to a measure for reliable electrical contacting of the contact spring with the circuit.
  • Line webs according to claim 9 ensure a short response time of the contact spring. This causes the device switch to trip very quickly in the event of overcurrent.
  • the material of the cable web is e.g. Duratherm or CuBe.
  • the cable bridge acts like a resistance wire. The sensitivity of such a resistance wire is greater than that of a bimetal. The tripping time of the device switch is thus further reduced. In the same way, the cooling time of the cable bridge heated by overcurrent is very short. This enables a faster return of the contact spring to its contact position by means of rocker switch swiveling.
  • the rocker switch acts like a conventional push button on the contact spring. This creates a high degree of efficiency Shift paddle pivoting force acting on the contact spring. The contact spring is returned to its contact position with little effort.
  • Claim 11 ensures good guidance of the contact spring during its return to the contact position by the rocker switch. This avoids mechanically unstable conditions of the contact spring.
  • Claims 12 to 15 propose suitable measures to convert the pivoting movement of the rocker switch into a compressive force acting on the contact spring against its mechanical pretension.
  • a coupling member with spring action is provided according to claims 13 and 14.
  • Such a coupling member enables the required non-rigid, but at the same time mechanically stable coupling between the rocker switch and the contact spring.
  • the arrangement of the coupling member according to claim 14 and 15 also has a space-saving effect.
  • Claim 16 takes into account a sufficient mechanical coupling of the rocker switch with a contact spring designed according to claim 7.
  • the reliable operation of the contact bridge is ensured as a two-armed lever.
  • the spring action of the fixing spring enables good power transmission from the rocker switch to the contact bridge.
  • the fixing spring compensates for manufacturing tolerances of the rocker switch and the contact bridge as well as wear and tear of the two components, so that a constant mechanical coupling effect between the rocker switch and the contact bridge is maintained over the course of the operating time.
  • the fixing spring is mechanically stable on the housing of the device switch and thereby supports the stable pivot bearing of the contact bridge.
  • the contact bridge is mounted very far from the end of the fixing spring. In this way, a sufficient pivoting mobility of the rocker switch is ensured to act on the two lever arms of the contact bridge.
  • Claim 19 enables a good electrical contact pressure of the contact bridge in its contact closed position.
  • the spring force of the fixing spring is aligned in the direction of the contact closing position.
  • the contact pressure can be applied by the corresponding lever arm of the contact bridge Actors of the rocker switch can be improved.
  • the fixing spring running parallel to the contact bridge also supports the small structure of the device switch.
  • the inherent stability of the fixing spring is further improved.
  • the number of components forming the circuit within the device switch is kept very low. Mechanical fixations also act as electrical contacts. In this way, the assembly and also the component expenditure of the device switch is reduced, as a result of which the device switch can also be produced very inexpensively. The small number of components also prevents undesired additional contact resistances between the current-carrying components.
  • the claims 24 and 25 allow convenient handling of the device switch for connection to an external circuit.
  • the contact terminal electrically contacting the fixing spring with each other can advantageously be used to connect a further electrical tric consumer to the device switch. For this consumer, however, only the contact bridge is effective as an on and off switch. The overcurrent protection integrated in the device switch is not effective for this consumer.
  • Claim 26 enables a very effective power transmission between the individual components of the switching mechanism within the device switch, each acting as a lever. This also supports the reliable functioning of the switching mechanism.
  • the levers arranged according to claim 25 act as a compact mechanical unit and thereby additionally support the space-saving dimensioning of the device switch.
  • the switching position of the contact spring is signaled to an operator.
  • optical signaling is provided. Due to the electrical wiring of the lamp and the series resistor with the contact spring, the lamp only lights up when the contact spring is in its open position and when the contact bridge is in its contact closed position, so that a voltage is still applied to the lighting assembly.
  • the lamp can be, for example, an incandescent lamp, a glow lamp or an LED.
  • FIG. 1 the electrical principle of operation of a device switch 1 is shown.
  • the switching mechanism of the device switch 1 is located within an insulating housing 2 made of plastic.
  • a switching rocker 3, a contact bridge 4 and a contact spring 5 are shown schematically in FIG. 1 of the switching mechanism.
  • the rocker switch 3 is pivotally mounted on the insulating housing 2.
  • the device switch 1 can be switched on and off manually by means of the rocker switch 3.
  • the rocker switch pressurizes the contact bridge 4 during its swiveling movements. Accordingly, the contact bridge 4 closes or opens, depending on the switch position, the circuit formed within the insulating housing 2 between two contact connections 6, 7.
  • the two contact connections 6, 7 serve to connect an electrical consumer (not shown here) and a voltage source (also not shown).
  • the contact bridge 4 and the contact spring 5 are electrically connected in series between the two contact connections 6, 7.
  • the contact spring 5 is used only to interrupt the circuit in the event of overcurrent.
  • it contains a thermal tripping element which, in the event of an overcurrent, triggers the transfer of the contact spring 5 from its contact position into its open position which interrupts the circuit.
  • the special structure of the contact spring 5 and the mechanical coupling between the contact spring 5 and the rocker switch 3 ensure that the contact spring 5 in its open position after tripping overcurrent remains and can only be returned to its contact position by a rocker switch swivel. With such a pivoting movement of the rocker switch 3, the contact bridge 4 is simultaneously transferred into its contact opening position which interrupts the circuit.
  • the contact spring 5 remains in its contact position regardless of the pivoting position of the rocker switch 3.
  • the contact spring 5 is electrically connected in parallel with a lighting assembly consisting of a lamp 8 and a series resistor 9.
  • the lamp 8 is e.g. an LED. It only lights up when the contact spring 5 is in its open position and an electrical voltage is still present at the two contact connections 6, 7.
  • the overcurrent release of the device switch 1 is optically displayed for an operator. The operator then leads the contact spring 5 back into its contact position by means of a single swiveling movement of the rocker switch 3 and at the same time transfers the contact bridge 4 into its contact opening position.
  • the contact bridge 4 is designed for a very large number of switching cycles because of the manual switching on and off of the device switch 1, the contact spring 5 can have a relatively small number of switching cycles, since the switching position of the contact spring 5 is only changed in the event of an overcurrent.
  • the housing walls 10 of the insulating housing 2 in FIG. 2 delimit a shaft-like housing interior 11.
  • Two housing walls 10 lying opposite one another in a transverse direction 12 are each pierced by a bearing bore 13.
  • the two bearing bores 13 are aligned with one another in the transverse direction 12. They serve for the positive reception of two bearing pins 14 of the rocker switch 3 for their pivoting mounting on the insulating housing 2.
  • the two bearing pins 14, of which only one bearing pin 14 is visible in FIG. 2, are integrally formed on the rocker switch 3, which is usually made of plastic.
  • the rocker switch 3 is inserted into the housing interior 11 in an insertion direction 15 arranged at right angles to the transverse direction 12 locked in its inserted position with the bearing bores 13.
  • the two side walls of the rocker switch 3 equipped with the bearing pins 14 are each extended in a wedge-like manner with a wedge tip which dips into the housing interior 11 along the direction of insertion 15. This extension serves as an actuator 16 for pressurizing the contact bridge 4.
  • the rocker switch 3 protrudes in its inserted position (FIGS. 3-6) against the direction of insertion 15 beyond the insulating housing 2.
  • the rocker switch 3 is surrounded by a frame-like housing collar 17 approximately form-fitting.
  • the housing collar 17, like the insulating housing 2 has a rectangular outline cross section.
  • the housing collar 17 projects beyond the insulating housing 2 on all sides.
  • the housing collar 17 and the housing walls 10 are connected to one another in one piece.
  • the housing collar 17 also protects the components lying in the housing interior 11 from mechanical damage.
  • Two latching arms 19 are integrally formed on each of the two housing walls 10 opposite each other in a longitudinal direction 18. They extend along the direction of insertion 15 and serve to lock the device switch 1 e.g. in a control panel.
  • the longitudinal direction 18 is arranged at right angles to the transverse direction 12 and to the direction of insertion 15.
  • Two partition walls 21, 22 are integrally formed on a housing base 20 of the insulating housing 2 opposite the housing collar 17 in the insertion direction 15.
  • the wall surface of the partition 21 lies in a plane spanned by the transverse direction 12 and the insertion direction 15.
  • the wall surface of the partition 22 lies in a plane spanned by the insertion direction 15 and the longitudinal direction 18.
  • the two partition walls 21, 22 together form a T-shape. They divide the surface of the housing base 20 into three surface sections of approximately the same size.
  • a contact connection 6, 7, 23 is assigned to each surface section, which projects beyond the housing base 20 in the direction of insertion 15.
  • the partitions 21, 22 serve to electrically shield the contact connections 6, 7, 23 from one another.
  • the housing base 20 is pierced by three slots so that the contact connections 6, 7, 23 can be inserted into the housing interior 11 in the direction of insertion 15 during the assembly of the device switch 1 and can penetrate the housing base 20.
  • the slots surround the contact connection 6, 7, 23 assigned to them in a form-fitting manner, thereby ensuring that the contact connections 6, 7, 23 are mechanically stable and fixed to the housing.
  • An additional position stabilization of the contact connections 6, 7 can be achieved in that their end regions protruding from the housing base 20 are slightly rotated relative to the regions seated in the housing interior 11.
  • two grooves 24 opposite each other in the longitudinal direction 18 are formed in the contact connections 6, 7.
  • the contact connections 6, 7, 23 are plate-like, electrically conductive contact pins.
  • the contact connections 6, 7 lie in a plane spanned by the insertion direction 15 and the longitudinal direction 18.
  • the contact terminal 6 extends within the housing interior 11 against the direction of insertion 15 shorter than the contact terminal 7.
  • the free end of the contact terminal 6 within the housing interior 11 is angled in the transverse direction 12 and has approximately the shape of a rectangular plate.
  • a fixed contact 25 is arranged on this plate. It is pressed out as a dome from the plate-like free end of the contact connection 6.
  • the fixed contact 25 is designed as a rivet or welding plate.
  • the fixed contact 25 interacts with a movement contact 26 pressed out as a dome from the plate-like contact bridge 4.
  • the T-roof of the contact bridge 4 is penetrated in the insertion direction 15 by a fixing slot 27.
  • a bearing web 28 aligned approximately parallel to the direction of insertion 15 passes through the fixing slot 27.
  • the bearing web 28 is an integral part of a fixing spring 29.
  • the fixing spring 29 is U-shaped in the transverse direction 12, the bearing web 28 forming the one U-leg.
  • the other U-leg is formed by two fixing webs 30 aligned in the transverse direction 12.
  • the two fixing webs 30 are mechanically firmly connected to the contact connection 23, for example by welding.
  • the engagement of the spring bar 28 in the fixing slot 27 in the assembled state of the device switch 1 results in a pivot-mounted mounting of the contact bridge 4.
  • the pivoting direction of the contact bridge 4 runs in or against the direction of insertion 15.
  • the fixing spring 29 acts like a Leaf spring with a spring force extending approximately in the direction of insertion 15. In this way, the necessary contact pressure between the fixed contact 25 and the movement contact 26 is established in the contact closed position of the contact bridge 4 (FIG. 3).
  • the terminal contact 7 is extended against the direction of exposure 15 by a fixed contact 31.
  • the fixed contact 31 is an integral part of the contact connection 7. It projects beyond the contact connection 7 on one side in the transverse direction 12.
  • the fixed contact 31 forms a plate-like stop surface for a movement contact 32 mechanically and electrically connected to the contact spring 5.
  • the fixed contact 31 is angled against the direction of insertion 15.
  • a fixing pin 33 extending counter to the direction of insertion 15 is integrally formed. When viewed in the longitudinal direction 18, it is V-shaped. In the assembled state, the fixing pin 33 passes through a correspondingly shaped slot in the plate surface of an insulating plate 34 to be described later. In the assembled state, the insulating plate 34 latches with the fixing pin 33.
  • the contact spring 5 has a U-shaped, resilient metal strip with spring webs 35 running in the longitudinal direction 18 as a U-leg and with a U-base running in the transverse direction 12. The U-bottom of this metal strip is penetrated by the movement contact 32 in the assembled state of the contact spring 5.
  • a line web 36 which likewise extends in the longitudinal direction 18, is arranged centrally between the two spring webs 35.
  • the line web 36 is designed as a resistance wire and is integrally formed on the U-bottom of the U-shaped metal strip.
  • the line web 36 projects beyond the spring webs 35 in the longitudinal direction 18 with an approximately T-shaped web end 37.
  • the clamping of the contact spring 5, which will be described with reference to FIG. 3, takes place on an insulating piece 38.
  • the insulating piece 38 On the side facing the contact terminal 23, the insulating piece 38 is extended by an insulating pin 39 integrally molded thereon. In the assembled state, the insulating pin penetrates a corresponding pin slot 40 of the contact connection 23 in a form-fitting manner. As a result, the insulating piece 38 is fixed in place on the contact connection 23 in the assembled state of the device switch.
  • the pin slot 40 separates a cross-like part of the contact connection 28, which in the assembled state essentially protrudes from the housing base 20, from the one above the pin slot along the direction of insertion 15 40 against the direction of insertion 15 aligned extension part.
  • Two fixing pins 41, 42 are formed on the free end of this extension part.
  • the fixing pins 33, 41, 42 are arranged at approximately the same height.
  • the two fixing pins 41, 42 like the fixing pin 33, penetrate correspondingly shaped slots in the insulating plate 34. In this way, the insulating plate 34 is mounted in an impassable manner.
  • the two fixing pins 41, 42 are separated from one another in the transverse direction 12 by a gap 43.
  • the gap 43 is a groove-like incision of the contact connection 23 which extends in the direction of insertion 15. In the region of its gap end slightly above the pin slot 40, the gap 43 also separates two chip grooves 44 from one another. They are arranged on the side of the contact terminal 23 facing away from the longitudinal direction 18 of the contact spring 5 and extend in the transverse direction 12. They serve to fix the bearing end of the web end 37 in the assembled state of the device switch 1.
  • the fixing pins 33, 42 are cut in a groove-like manner in the direction of insertion 15.
  • the incision of the fixing pin 33 serves to receive and electrically contact a connecting wire 45 of the lamp 8, while the incision of the fixing pin 42 is intended in the same way for a connecting wire 46 of the series resistor 9.
  • the lighting assembly consisting of the lamp 8 and the series resistor 9 is electrically connected in parallel to the contact spring 5.
  • Two identical plate walls 47 and two identical plate walls 48 are integrally formed on the surface of the insulating plate 34 facing the switching rocker 3.
  • the plate walls 47 and the plate walls 48 are each arranged at a distance from one another in the transverse direction 12.
  • the lighting module can be stored in a mechanically stable manner between the two plate walls 48.
  • the plate walls 47 shield a return spring 51 to be described from the connecting wire 45.
  • two shepherd's rod-like receiving hooks 49 are integrally formed. They are arranged at a distance from one another in the transverse direction 12 and are aligned with one another in this direction.
  • the hook-free end of the receiving hook 49 is bent semicircularly opposite to the direction of insertion 15. It serves for the positive insertion of the correspondingly curved bearing end 50 of a return spring 51.
  • the bearing end 50 is an integral part a resilient metal strip.
  • the strip part of the metal strip adjoining the bearing end 50 is aligned approximately in the longitudinal direction 18. Then this part of the strip is bent in the manner of a loop.
  • the loop itself is effective as a coupling end 52 for pressurizing a spring bar 35 of the contact spring 5.
  • the bent strip part and the non-bent strip part are connected to one another by a stiffening tab 53.
  • the return spring 51 When viewed in the transverse direction 12, the return spring 51 has approximately a T shape.
  • the strip part extending between the bearing end 50 and the coupling end 52 forms the T-transverse leg, while a spring longitudinal leg 54 adjoining the bent-over strip part in the area of the stiffening tab 53 is oriented counter to the direction of insertion 15 and forms the T longitudinal leg.
  • the free end of the longitudinal spring leg 54 is bent in a U-shape in the direction of insertion 15.
  • the bent free end acts as a support end 55 and is supported on the rocker switch 3 in the assembled state (FIG. 3).
  • a strip-like stiffening tab 56 oriented in the direction of insertion 15 is molded onto it.
  • the return spring 51 also has two identical T-shaped spring parts. These two spring parts are arranged at a distance from one another in the transverse direction 12 and are aligned with one another in this direction. In the spacing area, they are connected to one another in one piece by a strip part of the return spring 51.
  • the return spring 51 can be produced from a single metal strip. Such a metal strip only has to be preformed by appropriate cutouts and bends.
  • FIG. 3 all components of the device switch 1 are in their assembled state.
  • the U-shaped bearing end 50 is rotatably supported in the receiving hook 49.
  • the support end 55 is supported on the inner surface of the rocker switch 3 facing the insulating plate 34 in the direction of insertion 15.
  • Two support stops 57, 58 are integrally formed on this inner surface. They extend in the manner of a peg with a different outline cross section and a different length approximately in the direction of insertion 15.
  • the support stops 57, 58 are arranged at a distance from one another in the longitudinal direction 18.
  • the support end 55 lies in the space formed by the distance.
  • the support stops 57.58 ensure that the return spring 51 with its support end 55 can only escape from its inserted position within certain limits.
  • the storage of the return spring 51 in the two receiving hooks 49 and its support in the rocker switch 3 enable spring-movable rotatability between the longitudinal spring legs 54 and the coupling ends 52.
  • the imaginary axis of rotation runs in the transverse direction 12 with the break point between the longitudinal spring leg 54 and the adjoining one Spring strip part as a starting point for this axis of rotation. In this way, a pivoting movement of the rocker switch 3 can be converted into a spring force acting on the spring bars 35.
  • the insulating plate 34 extends in the longitudinal direction 18 essentially over the entire interior 11 of the housing. It ensures the necessary creepage distances and clearances between the circuit and the operating area, namely the rocker switch 3.
  • the contact spring 5 is clamped fixed to the housing with its clamping end opposite the pivotable free end in the longitudinal direction 18.
  • the clamping end of the contact spring 5 has the web end 37 and the free ends of the spring webs 35.
  • the line web 36 passes through the gap 43 of the contact connection 23 and engages behind the contact connection 23 with its web end 37.
  • the web end 37 is fixed in the flutes 44 in the manner of a cutting edge bearing.
  • the free ends of the spring bars 36 are each supported in the manner of a cutting edge bearing in a V-shaped flute 59 of the insulating piece 38.
  • the flutes 59 are widened in the direction of the movement contact 32 of the contact spring 5.
  • the distance between the flutes 59 and the flutes 44 is selected such that in the assembled state of the contact spring 5, the line web 36 is subjected to tension and the two spring webs 35 are bent.
  • the spring bars 35 are therefore biased in the direction of the rocker switch 3 (Fig. 4).
  • the spring bars 35 are pressed into their position corresponding to the contact position of the contact spring 5 by the spring force of the coupling ends 52 (FIG. 3).
  • the contact spring 5 In its contact position, the contact spring 5 is electrically contacted with the contact terminal 6. For this purpose, the contact spring 5 rests with its movement contact 32 on the fixed contact 31 under sufficient contact pressure. In this position, the contact spring 5 is not acted upon by the return spring 51.
  • the contact bridge 4 is in its contact closed position in FIG. 3 and is in this case electrically contacted with the contact connection 6.
  • the movement contact 26 is in contact with the fixed contact 25 with sufficient contact pressure.
  • the contact bridge 4 is a two-armed lever which is pivotably mounted on the bearing web 28 of the fixing spring 29.
  • the lever arm of the contact bridge 4 provided at its free end with the movement contact 26 is pressed against the fixed contact 25 by the correspondingly preloaded fixing spring 29.
  • the swivel path of the active end 16 is limited by a limit stop 65 fixed to the housing. In the closed contact position of the contact bridge 4, the operative end 16 bears against the limit stop 65, which extends counter to the insertion direction 15.
  • the active end 16 is seated on this lever arm of the contact bridge 4.
  • the fixing spring 29 itself is a one-armed lever. With its bearing web 28 as a free end, the fixing spring 29 can be pivoted, while its imaginary pivot axis is arranged in the region of its support fixed to the housing.
  • the housing-fixed support of the fixing spring 29 is carried out by welding the fixing webs 30 and by their support on a support pin 60.
  • the support pin 60 is integrally formed on the housing base 20 and extends counter to the direction of insertion 15. It also flanks the contact connection 23 for its improved housing fixation.
  • the device switch 1 In Fig. 3 the device switch 1 is in its on position. By swiveling the rocker switch 3, the device switch 1 can be moved manually into its off position (FIG. 5). Here, the active end 16 moves along the longitudinal direction 18 in the direction of the lever arm of the contact bridge 4 not acted on in FIG. 3. The contact bridge 4 is thereby pivoted clockwise by the active ends 16. As a result, it is moved into its contact opening position, the circuit within the device switch 1 is then interrupted.
  • the circuit within the device switch 1 runs as follows: Contact connection 6 - fixed contact 25 - movement contact 26 - contact bridge 4 - fixing spring 29 - contact connection 23 - cable bridge 36 - movement contact 32 - fixed contact 31 - contact connection 7. By switching the rocker switch again, the contact bridge 4 is in its closed position again transferable.
  • the two spring bars 35 - as already described - are fixed against their bias.
  • the line web 36 is greatly stretched in the longitudinal direction 18 with respect to the spring webs 35.
  • the large expansion between the line web 36 and the spring webs 35 is made possible in that the current flows only through the line web 36. It is electrically connected to the circuit on the one hand via the web end 37 and on the other hand via the movement contact 32.
  • the spring bars 35 are fixed to the insulating piece 38 made of insulating material.
  • the distance between the flutes 44, 59 is very small, so that the expansion of the insulating piece 38, which is usually made of plastic, does not influence the expansion ratios between the line web 36 and the spring webs 35. If the line web 36 reaches a certain length due to its overcurrent-related expansion, the normal preload of the spring webs 35 becomes greater than the clamping of the spring webs 35 shown in FIG. 3. the spring bars 35 snap opposite to the direction of insertion beyond the dead center position into their position corresponding to the normal preload (FIG. 4). Since the clamping of the spring bars 35 shown in FIG. 4 also corresponds to their normal clamping in the assembled state, the contact spring 5 remains reliably in its open position without pivoting the rocker switch 3.
  • the contact bridge 4 is initially still in its contact closed position (FIG. 4). If electrical voltage is still present on the circuit, an operator is visually shown that the contact spring 5 has been moved into its open position by the illuminated lamp 8. For better detection of the lamp light, a plurality of prisms 61 are inserted into the switching rocker 3 made of translucent plastic.
  • the limit stop 62 is integrally formed on the housing base 20 and extends counter to the direction of insertion 15. It limits the pivoting path of the effective end 16 in the counterclockwise direction. This ensures that the operative end 16 always remains in engagement with the contact bridge 4 during the pivoting position of the rocker switch 3 shown in FIG. 5. As a result, the contact bridge 4 remains reliably in its contact opening position without having to pivot the rocker switch again.
  • the device switch 1 is axially symmetrical with respect to an axis of symmetry 63 running parallel to the direction of insertion 15 with essential functional parts. This supports the space-saving, compact structure of the device switch 1.
  • the axes of rotation of all components of the device switch 1 which act as levers are arranged parallel to the transverse direction 12, as is a rocker switch axis 64 of the rocker switch 3. This also supports the compact, small design and the simple construction of the device switch 1.

Landscapes

  • Tumbler Switches (AREA)
  • Breakers (AREA)
  • Electronic Switches (AREA)
  • Thermally Actuated Switches (AREA)
  • Semiconductor Integrated Circuits (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)

Claims (28)

  1. Interrupteur électrique à actionnement manuel (1) pour des appareils,
    - comportant une bascule de commutation (3) montée dans un boîtier isolant (2),
    - qui, selon la position de basculement, déplace par une extrémité d'action (16) plongeant dans l'espace intérieur (11) du boîtier, un pont de contact (4) entre une position de fermeture de contact et une position d'ouverture de contact, et
    - comportant un ressort de contact (5) branché électriquement en série avec le pont de contact (4), susceptible d'être déclenché thermiquement et agissant ainsi en tant que protection anti-surcharge,
    caractérisé en ce que le ressort de contact (5) est un mécanisme basculant à passage brusque qui est mobile entre sa position de contact et sa position d'ouverture, et
    - qui est mis sous précontrainte permanente en direction de sa position d'ouverture,
    - qui est passé depuis sa position de contact jusque dans sa position d'ouverture par un élément de déclenchement thermique lors d'une surcharge, et
    - qui est ramené depuis sa position d'ouverture jusque dans sa position de contact par un basculement de la bascule qui s'effectue à l'encontre de la précontrainte mécanique approximativement en direction de basculement (66) du ressort de contact (5).
  2. Interrupteur selon la revendication 1, dans lequel le pont de contact (4) s'étend approximativement parallèlement aux bras de levier de la bascule de commutation (3), caractérisé en ce que le ressort de contact (5) s'étend approximativement parallèlement au pont de contact (4) et aux bras de levier de la bascule de commutation (3).
  3. Interrupteur selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce que le ressort de contact (5) est agencé entre la bascule de commutation (3) et le pont de contact (4).
  4. Interrupteur selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le pont de contact (4), la bascule de commutation (3), et le ressort de contact (5) sont montés en basculement dans le même plan de déplacement et présentent des axes de basculement s'étendant parallèlement les uns aux autres.
  5. Interrupteur selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le ressort de contact (5) est serré du côté boîtier par une extrémité fixe, et en ce qu'il est mobile en basculement par son extrémité mobile entre la position de contact et la position d'ouverture.
  6. Interrupteur selon la revendication 5, caractérisé en ce que le ressort de contact (5) peut être mis en contact avec le circuit électrique par un contact à déplacement (32) agencé à l'extrémité mobile.
  7. Interrupteur selon l'une ou l'autre des revendications 5 et 6, caractérisé en ce que le ressort de contact (5), serré solidairement sur le boîtier, comprend entre deux barrettes élastiques parallèles (35) une barrette conductrice métallique (36) en tant qu'élément de déclenchement, qui est serrée de façon plus courte que les barrettes élastiques (35).
  8. Interrupteur selon l'une quelconque des revendications précédentes, caractérisé en ce que le ressort de contact (5) est électriquement en contact avec le circuit électrique via la barrette conductrice (36) à son extrémité fixe serrée.
  9. Interrupteur selon l'une ou l'autre des revendications 7 et 8, caractérisé en ce que la barrette conductrice (36) est un métal qui présente un coefficient de dilatation thermique élevé.
  10. Interrupteur selon l'un quelconque des revendications précédentes, caractérisé en ce que pendant son mouvement de basculement, la bascule de commutation (3) sollicite en pression et approximativement en direction de basculement (66) le ressort de contact (5) situé en position d'ouverture, et le ramène ainsi dans sa position de contact.
  11. Interrupteur selon l'une quelconque des revendications 7 à 10, caractérisé en ce que la bascule de commutation (3) sollicite les deux barrettes élastiques (35) du ressort de contact (5).
  12. Interrupteur selon l'une ou l'autre des revendications 10 et 11, caractérisé en ce que le ressort de contact (5) est sollicité par un organe de couplage relié mécaniquement à la bascule de commutation (3).
  13. Interrupteur selon la revendication 12, caractérisé en ce que l'organe de couplage est un élément élastique.
  14. Interrupteur selon la revendication 13, caractérisé en ce que l'organe de couplage est un ressort de rappel (51) en forme de T,
    - dont le bras transversal et le bras longitudinal élastique (54) peuvent tourner élastiquement l'un par rapport à l'autre autour de leur point de liaison faisant office de point de rotation dans le plan de basculement de la bascule de commutation (3), et
    - qui sollicite par un bras le ressort de contact (5).
  15. Interrupteur selon la revendication 14, caractérisé en ce que le ressort de rappel (51) est monté par son bras longitudinal élastique (54) sur la bascule de commutation (3) et sollicite le ressort de contact (5) par l'extrémité libre du bras transversal, laquelle fait office d'extrémité de couplage (52), tandis que l'autre extrémité libre du bras transversal, qui fait office d'extrémité de montage (50), est montée du côté boîtier et de façon mobile en rotation.
  16. Interrupteur selon la revendication 15, caractérisé en ce que le ressort de rappel (51) présente deux extrémités de couplage (52) pour solliciter respectivement une barrette élastique (35) du ressort de contact (5).
  17. Interrupteur selon l'une ou plusieurs revendications précédentes, dans lequel le pont de contact (4) est un levier à deux bras monté sur le boîtier, dont un bras de levier est sollicité par la bascule de commutation (3) dans la position de fermeture de contact, et dont l'autre bras de levier est sollicité par celle-ci dans la position de fermeture de contact, caractérisé en ce que le pont de contact (4) est monté en basculement sur le boîtier isolant (2) au moyen d'un ressort de fixation (29) et en ce qu'il est sollicité directement par l'extrémité d'action (16) de la bascule de commutation (3).
  18. Interrupteur selon la revendication 17, caractérisé en ce que le ressort de fixation (29) sous forme de levier à un bras est fixé solidairement sur le boîtier, et en ce qu'il porte le pont de contact (4) dans la région éloignée de l'extrémité fixée.
  19. Interrupteur selon l'une ou l'autre des revendications 17 et 18, caractérisé en ce que le ressort de fixation (29) est un ressort à lame précontraint en direction de la position de fermeture de contact du pont de contact (4) et présentant une allure approximativement parallèle au pont de contact (4).
  20. Interrupteur selon l'une ou l'autre des revendications 18 et 19, caractérisé en ce que le ressort de fixation (29) présente une section en forme de U,
    - dont l'âme s'étend approximativement parallèlement au pont de contact (4), et
    - dont un bras faisant office de barrette de fixation (30) est fixé solidairement sur le boîtier, tandis que l'autre bras faisant office de barrette de montage (28) traverse un évidement de montage (27) du pont de contact (4) pour son montage en basculement.
  21. Interrupteur selon l'une quelconque des revendications 17 à 20, caractérisé en ce que le pont de contact (4) est monté avec contact électrique sur le ressort de fixation (29).
  22. Interrupteur selon l'une quelconque des revendications précédentes, caractérisé en ce que le ressort de contact (5) et le ressort de fixation (29) sont montés solidairement sur le boîtier et sont en contact électrique.
  23. Interrupteur selon la revendication 22, caractérisé en ce que le ressort de contact (5) et le ressort de fixation (29) sont fixés sur un raccord de contact (23) électriquement conducteur et solidaire du boîtier.
  24. Interrupteur selon l'une quelconque des revendications précédentes, caractérisé en ce que le ressort de contact (5) dans la position de contact et le pont de contact (4) dans la position de fermeture de contact sont respectivement en contact électrique avec un raccord de contact (6, 7) solidaire du boîtier et faisant office de raccordement pour un appareil utilisateur électrique.
  25. Interrupteur selon l'une ou l'autre des revendications 23 et 24, caractérisé en ce que les raccords de contact (6, 7, 23) dépassent en forme de tige hors du boîtier isolant (2).
  26. Interrupteur selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que tous les leviers ( = bascule de commutation (3), ressort de contact (5), ressort de rappel (51), pont de contact (4), ressort de fixation (29)) sont montés en basculement dans le même plan de déplacement et présentent des axes de basculement qui s'étendent parallèlement les uns aux autres.
  27. Interrupteur selon l'une quelconque des revendications précédentes, caractérisé par un affichage de la position de commutation du ressort de contact (5).
  28. Interrupteur selon la revendication 27, caractérisé en ce qu'une unité structurelle d'éclairage constituée par une lampe (8) et par une résistance série (9) est branchée en tant qu'affichage optique parallèlement au ressort de contact (5).
EP94103559A 1993-03-17 1994-03-09 Interrupteur d'appareil à protection de surintensité du courant intégré Expired - Lifetime EP0616352B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE9421886U DE9421886U1 (de) 1993-03-17 1994-03-09 Geräteschalter mit integriertem Überstromschutz

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9303919 1993-03-17
DE9303919U 1993-03-17

Publications (2)

Publication Number Publication Date
EP0616352A1 EP0616352A1 (fr) 1994-09-21
EP0616352B1 true EP0616352B1 (fr) 1997-04-09

Family

ID=6890754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94103559A Expired - Lifetime EP0616352B1 (fr) 1993-03-17 1994-03-09 Interrupteur d'appareil à protection de surintensité du courant intégré

Country Status (11)

Country Link
US (1) US5491460A (fr)
EP (1) EP0616352B1 (fr)
JP (1) JP2569271B2 (fr)
KR (1) KR0161544B1 (fr)
AT (1) ATE151566T1 (fr)
CA (1) CA2119211C (fr)
DE (2) DE59402333D1 (fr)
DK (1) DK0616352T3 (fr)
ES (1) ES2102085T3 (fr)
GR (1) GR3023728T3 (fr)
TW (1) TW329014B (fr)

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Also Published As

Publication number Publication date
DK0616352T3 (da) 1997-10-20
US5491460A (en) 1996-02-13
ATE151566T1 (de) 1997-04-15
TW329014B (en) 1998-04-01
CA2119211C (fr) 1997-08-19
ES2102085T3 (es) 1997-07-16
DE9421886U1 (de) 1997-02-06
KR0161544B1 (ko) 1999-01-15
GR3023728T3 (en) 1997-09-30
EP0616352A1 (fr) 1994-09-21
CA2119211A1 (fr) 1994-09-18
JP2569271B2 (ja) 1997-01-08
JPH0750119A (ja) 1995-02-21
KR940022613A (ko) 1994-10-21
DE59402333D1 (de) 1997-05-15

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