EP0450366B1 - Disjoncteur commandé par bouton-poussoir - Google Patents

Disjoncteur commandé par bouton-poussoir Download PDF

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Publication number
EP0450366B1
EP0450366B1 EP91104014A EP91104014A EP0450366B1 EP 0450366 B1 EP0450366 B1 EP 0450366B1 EP 91104014 A EP91104014 A EP 91104014A EP 91104014 A EP91104014 A EP 91104014A EP 0450366 B1 EP0450366 B1 EP 0450366B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
breaker according
connecting arm
switch
bimetallic strip
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
EP91104014A
Other languages
German (de)
English (en)
Other versions
EP0450366A1 (fr
Inventor
Fritz Krasser
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
Priority claimed from DE9004031U external-priority patent/DE9004031U1/de
Application filed by Ellenberger and Poensgen GmbH filed Critical Ellenberger and Poensgen GmbH
Publication of EP0450366A1 publication Critical patent/EP0450366A1/fr
Application granted granted Critical
Publication of EP0450366B1 publication Critical patent/EP0450366B1/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
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/22—Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
    • 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
    • H01H73/30—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 push-button, pull-knob or slide
    • H01H73/306—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 push-button, pull-knob or slide the push-button supporting pivotally a combined contact-latch lever
    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427—Adjusting only the electrothermal mechanism
    • H01H71/7436—Adjusting the position (or prestrain) of the bimetal
    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H2071/7481—Means for adjusting the conditions under which the device will function to provide protection with indexing means for magnetic or thermal tripping adjustment knob
    • 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
    • H01H71/128—Manual release or trip mechanisms, e.g. for test purposes

Definitions

  • the invention relates to a circuit breaker with thermal tripping according to the preamble of claim 1.
  • Such switches are known for example from DE-A 25 02 579 . This known switch works on the principle of thermal tripping by means of a bimetal strip.
  • the bimetallic strip has an approximately right-angled bend and is supported near the bend point by two bead projections molded onto a switch housing with little play.
  • a contact lug protrudes laterally and in the direction of the contact piece of a right-angled contact bridge.
  • a release spring presses the contact bridge with the contact piece against the contact lug. If an overcurrent occurs, the bimetal strip is bent out by heating in such a way that the contact bridge is released from the contact lug and is pressed into its switched-off position by the force of the compression spring.
  • the trigger sensitivity of the switch is set using an adjusting screw.
  • the adjusting screw works according to the principle of tension-compression adjustment via a preload and deformation on a connecting arm that is firmly connected to the bimetal strip.
  • a disadvantage of this adjustment is the instability of the adjusting screw in the adjustment state.
  • the preload force acting on the screw changes over the adjustment range.
  • the pretensioning force only acts on the center of the adjusting screw core.
  • a further disadvantage is that such adjusting screws are made of metallic and thus conductive materials and the risk of short-circuiting increases when there is an intermediate layer between closely spaced knife tabs. There is also a risk of damage to the knife flags by the adjusting screwdriver.
  • the invention has for its object to improve a circuit breaker of the type mentioned and to adapt its overall structure to the requirements of automated production.
  • the trigger mechanism of the switch corresponds in principle to that of the switch known from DE-A-25 02 579. However, its tripping sensitivity is set by means of a rotating body bearing against the connecting arm with its cylindrical outer surface.
  • the rotating body is mounted eccentrically in a switch housing about an axis of rotation and acts on the connecting arm with a certain pretensioning force. Due to its eccentric bearing, this preload changes with the rotation of the rotating body.
  • the connecting arm deforms under the action of the pretensioning force. Due to the kinematic connection of the connecting arm to the bimetal strip, in particular, the deformation of the connecting arm is transferred to the bimetal strip.
  • the tripping characteristic which determines the tripping behavior of the circuit breaker is consequently changed in such a way that the connecting arm and thus the bimetal strip undergo a defined pre-deformation.
  • the flattened portion of the rotating body rests on the connecting arm that has the smallest radial distance from the axis of rotation in the triggering direction, so that the rotating body acts on the connecting arm with a minimal pretensioning force.
  • the flattening fixes the rotating body in the installation position against rotation in the zero point position.
  • the circuit breaker can initially be installed completely automatically. It is irrelevant in which position the rotating body is installed. After production, the rotating body is turned until a noticeable resistance is overcome. After overcoming this resistance, the flattened part of the rotating body rests on the connecting arm and has thus reached its zero position.
  • the bimetal strip is adjusted from this zero position.
  • the radial distance of the area of the lateral surface adjacent to the connecting arm increases from the axis of rotation in such a way that the prestressing force acting on the connecting arm increases continuously and reaches a maximum after a 180 ° rotation.
  • the deformation of the bimetallic strip produced in this way has the effect that its pretension acting in the direction of the contact bridge in the region of the contact nose drops, and its sensitivity to tripping is thus increased.
  • This increase in trigger sensitivity reduces the maximum trigger time during operation.
  • the adjustment eccentric is not to be manipulated from the connection side of the switch, but instead the rotary body is adjusted from the housing sides, the contact elements can be moved very close to one another.
  • the storage of the rotating body in the switch housing between the contact elements favors the compact design of the switch. Furthermore, with the components designed according to the invention, it is possible both to make the switch narrow in the horizontal direction and to keep its narrow side height running in the fixing direction very flat.
  • connection contacts flank the rotating body and form a recess for the rotating body with their recesses. This increases the installation space for the rotating body.
  • connection contacts are made wider in the horizontal direction in order to create large contact areas for connection in the connection sockets of the plug-in base, particularly in the areas protruding from the switch housing.
  • spring hooks ensures a particularly safe and permanent locking of the switch in the plug-in base during heavy-duty use in motor vehicles.
  • Claims 5 to 8 teach a functionally particularly favorable structure of the entire switch mechanism.
  • the switch designed in this way builds up vertically, which favors the space-saving design in the horizontal direction and in the direction of the narrow sides.
  • the design of the bimetallic strip in connection with the contact lug causes the occurrence of high tensile force components with simultaneously occurring low bending force components on the bimetallic strip, thereby protecting the bimetallic strip during use.
  • the one-piece construction of the contact bridge, support base and pressure switch as an assembly advantageously favors the automated manufacture of the switch.
  • the prefabricated assembly can namely be mounted in the switch by means of a single operation by inserting it into one of the two half-shells forming the switch housing.
  • the use of such assemblies favors the modular, modular construction of the switch. It is also possible to prefabricate the assembly in large numbers with a consistently high level of manufacturing accuracy.
  • Claims 9 to 15 teach advantageous designs of the switch housing with the aid of which the built-in parts are particularly advantageously mounted in the switch housing. These favorable storage properties are further favorably influenced by the one-piece design of the connecting arm and bimetallic strip on one side and the connecting arm, connection contact and spring hook on the other side. Due to the one-piece design, the parts mentioned work together both mechanically and electrically very safely and reliably. In addition, the one-piece construction of the parts mentioned is structurally very simple and therefore inexpensive to manufacture.
  • the multiple form-fitting mounting of the one-piece assembly consisting of the parts mentioned, it is possible to fix the assembly in the housing by simply inserting it into one of the housing half-shells. This advantageously favors the automated assembly of the switch according to the invention.
  • the multiple storage of the one-piece assembly promotes the operational reliability and longevity of the switch. Because of this permanent storage, in particular of the connecting arm, particularly high forces can be transmitted to the connecting arm by the rotating body. The bearings present several times on the switch are consequently also suitable for absorbing very high pretensioning forces which act on the connecting arm.
  • the cheeks, the rib, the trough-like receptacle for the rotating body and the bead projections are designed on the switch housing in such a way that the deformation effective on the bimetal strip can be controlled particularly precisely, that is to say the bimetal strip can be deformed in a directed manner by the rotating body.
  • the claims 16 to 18 teach advantageous developments of the rotating body, which make it possible to inject the switch housing with the molded plastic bearing elements.
  • manufacturing tolerance errors that may occur during plastic injection molding can be compensated simply by an adjustment movement of the rotating body designed as a disc-shaped adjusting eccentric. Due to its infinitely variable adjustability, it is possible to compensate for manufacturing tolerance errors as well as to set the desired tripping characteristic.
  • the outer surface of the rotating body is delimited by two rotating body end faces.
  • a pivot pin protrudes from each of these two rotary body end faces such that the central longitudinal axis of the pivot pin is congruent with the axis of rotation of the rotary body.
  • These pivots which are preferably designed as cylinders, thus support the rotating body eccentrically in the switch housing.
  • bearing eyes are formed in the housing which penetrate the pivot pins.
  • the recesses in the assembled switch housing can be manipulated from the outside by recesses formed in the front end of the trunnion, in particular in the form of a hexagon socket become.
  • the rotating body is thus an adjustment eccentric acting on the connecting arm.
  • the pivots have an essentially star-shaped cross-sectional shape.
  • the outer surfaces of the pivots have a toothing corresponding to this star-shaped cross-sectional shape.
  • a detent is provided on the bearing eyes, which meshes with the teeth on the outer surface of the pivot and engages in them.
  • a particular advantage of the invention is that the force vector acting between the connecting arm and the adjustment eccentric always intersects the adjustment eccentric axis of rotation perpendicularly. The direction of action of this force on the axis of rotation is therefore constant.
  • the prestressing force acting between the connecting arm and the adjusting eccentric not only deforms the connecting arm, but also secures the respective position of the adjusting eccentric by self-locking. This particularly advantageous effect prevents unwanted twisting of the eccentric due to shaking or impact.
  • the position of the eccentric between the contact elements is particularly advantageous, but outside the plug-in area in which the contact elements are designed as knife lugs.
  • the hexagon wrench which is preferably used to manipulate the adjustment eccentric, does not come into contact with live parts, in particular with the knife lugs. Damage to the knife flags during adjustment is therefore excluded from the outset.
  • the adjustment eccentric is preferably designed as a narrow, space-saving disk. Due to the vertical course of the force vector through the axis of rotation described above, the resulting forces can still be absorbed even with an extremely narrow design, so that the desired self-locking is always maintained.
  • the configuration of the bimetal strip is particularly advantageous, in particular as a meander bimetal, in a second embodiment of the switch according to claims 22 to 24.
  • a plurality of bimetal tracks are connected in series in terms of current, as a result of which a relatively high resistance is achieved.
  • the heating power required for thermal triggering is easily accessible due to this increased resistance area of the bimetal strip.
  • the bimetallic strips lying next to one another are held together in a bandage-like manner by means of a clamp that surrounds them.
  • the circuit breaker 10 rests in a switch housing 40 consisting of an upper half shell 20 and a lower half shell 30.
  • the lower narrow side of the switch housing 40 forms the connection side 50.
  • the upper narrow side of the switch housing 40 facing away from the connection side 50 forms the Switch side 60.
  • the connection side 50 and the switch side 60 extend parallel to the horizontal direction 70.
  • the vertical direction 80 extends perpendicular to the horizontal direction 70.
  • the vertical direction 80 is composed of the trigger direction 90 running in the direction of the switch side 60 and that in the direction of the connection side 50 running direction 100 together.
  • a push button 120 protrudes in the triggering direction 90, lying approximately on the central longitudinal axis 110 of the circuit breaker 10 extending in the vertical direction 80.
  • the connection side 50 and the switch side 60 are connected to each other in the vertical direction 80 by two narrow sides, the right narrow side 130 and the left narrow side 130 '.
  • a knob 160 formed on a manual release 150 protrudes from an edge region 140 formed by the switch side 60 and the right narrow side 130 adjoining it.
  • connection side 50 protrude in the switch-on direction 100 two configured as knife flags, symmetrical to the central longitudinal axis 110 in the horizontal direction 70 adjacent contact elements, a right contact element 170 and a left contact element 170 '.
  • a spring hook 180, 180' is formed for fixing the circuit breaker 10 in a socket.
  • the contact elements 170, 170 ' are penetrated by a fixing hole 190, 190' in a perpendicular to the horizontal direction 70 and also perpendicular to the vertical direction 80 fixing direction 200.
  • On the lower shell 30 project in the fixing direction 200 in the area of the connection side 50 two fixing knobs 210, 210 'facing the upper half shell.
  • the fixing knobs 210, 210 penetrate the fixing holes 190, 190' and engage in two fixing openings 220, 220 'on the connection side 50 of the upper shell 20 in the fixing direction 200 for fixing the contact elements 170, 170' in the switch housing 40.
  • the upper half shell 20 and the lower half shell 30 are each penetrated by a rivet hole 230 lying on the connection side 50 in the fixing direction 200, in the horizontal direction 70 approximately on a line with the fixing openings 220, 220 'or fixing knobs 210, 210'.
  • the left edge region 140 'formed by the left narrow side 130' and the switch side 60 ' is also from a extending in the fixing direction 200 Rivet hole 230 penetrated.
  • the cohesion of the upper half shell 20 and the lower half shell 30 to form the switch housing 40 is achieved by rivets made in all the rivet holes 230.
  • a fixed contact 250 pointing in the direction of the interior of the housing is formed on a free end of the contact holder 240 which protrudes in the triggering direction 90.
  • the contact bridge 280 in turn consists of the vertical arm 270 running in the vertical direction 80 and a horizontal arm 290 which is connected at right angles to the latter at its end pointing in the triggering direction 90.
  • the free end of the horizontal arm 290 facing away from the vertical arm 270 forms the contact piece 300.
  • a compression spring 310 which is approximately congruent with the central longitudinal axis 110 in the switch housing 40 presses with its spring force acting in the triggering direction 90 against the flat side of the horizontal arm 290 facing the connection side 50.
  • the horizontal arm 290 assumes a horizontal position running parallel to the horizontal direction 70.
  • the contact piece 300 lies with its upper side facing the switch side 60 against a contact lug 320 such that it is in engagement with the latter.
  • the contact lug 320 is integrally formed on a bimetallic strip 330 in the direction of the compression spring 310.
  • the bimetallic strip 330 initially extends in the vertical direction 80 along the inside of the right narrow side 130, approximately from the switch side 60 to almost up to the connecting side 50. After an approximately right-angled bend 340, a horizontal part extending in the horizontal direction 70 is connected to this vertical part of the bimetallic strip 330 of the bimetallic strip 330.
  • This horizontal part of the bimetallic strip 330 is mounted between two molded on the switch housing 40 bead projections 350,350 ', the connection-side bead projection 350 and the switch-side bead projection 350', with little play.
  • the free end of the horizontal part of the bimetallic strip 330 opposite the vertical part of the bimetallic strip 330 has a vertical, approximately perpendicular bend which extends approximately in the vertical direction 80 and which, as a connecting surface, forms the connecting arm 370 which is also bent in this area.
  • the bimetallic strip 330 is consequently essentially U-shaped, as seen in the plane of the drawing in FIG. 2, with its horizontal part forming the U-web 331, with the vertical, long U-leg and part bent up at right angles as a short fastening leg 360.
  • the fastening leg 360 thus forms the interface with the link arm 370.
  • the connecting arm 370 runs from the connecting surface running in the vertical direction 80 with the fastening leg 360, initially horizontally obliquely in the direction of the connection side 50 and later parallel to the latter in the horizontal direction 70.
  • the right arm designed as a knife flag, is formed on the contact arm 370 in the switch-on direction 100 , Molded contact element 170.
  • the connecting arm 370 is mounted with its free end 371 facing away from the connecting surface with the fastening leg 360 between a switch-side cheek 372 and a connection-side cheek 373.
  • the rib 374 extending in the horizontal direction 80 protrudes in the fixing direction 200.
  • the right-hand contact element 170 in turn lies between the rib 374 and the trough-shaped recess 380 for receiving the rotating body 390.
  • the connecting arm 370, the right connection contact 170 and the right spring hook 180 are designed as a one-piece ⁇ -shaped component, the connecting arm 170 forming the ⁇ transverse yoke and the contact element 170 and the spring hook 180 forming the ⁇ legs.
  • This ⁇ -shaped component lies between the connection-side bead projection 350, the trough-shaped recess 380, the rib 374 and the cheeks 372, 373 in such a way that the connection-side cheek 373, the rib 374 and the trough-shaped recess 380 as a form-fitting fixed bearing against displacement of the ⁇ - shaped component in the horizontal direction 70 are effective.
  • the ⁇ -shaped component is clamped against shifting in the vertical direction 80 between the cheeks 372, 373 and on the End faces of the rib 374 and the end face of the trough-shaped recess 380 and the connection-side bead projection 350 are mounted.
  • the ⁇ -shaped structure therefore lies between the cheeks 372, 373, the rib 374 and the trough-shaped recess 380 and the bead projection 350 on the connection side.
  • a recess 380 extending in the fixing direction 200 for a drum-shaped rotating body 390 is formed in the half-shells 20, 30 of the switch housing 40.
  • a cylindrical pivot pin 400 which points in the fixing direction 200 to the upper half-shell 20 or the lower half-shell 30, protrudes from the end faces of the rotating body 390.
  • bearing eyes 410 are incorporated in the area of the recesses 380 in the fixing direction 200, the hollow geometry of which corresponds to the volume geometry of the pivot pins 400.
  • the rotating body 390 is thus freely rotatably supported in the bearing eyes 410 via its pivot pins 400.
  • the pivots 400 have a circular cross section in the horizontal direction 70 with a center 420. At their center 420, both pivots 400 are intersected by an imaginary axis of rotation 430 running parallel to the fixing direction 200.
  • the rotating body 390 has a likewise circular cross section in the horizontal direction 70, the center of which, however, is in any case outside the center 420 of the pivot 400 and the two centers are therefore in no way congruent with one another.
  • the rotating body 390 like the pivot 400, rotates about the axis of rotation 430 extending outside the center of the rotating body, as a result of which the rotating body 390 executes an eccentric rotary movement.
  • the pivots 400 and the rotating body 390 form the adjustment eccentric 450.
  • a hexagonal Allen key for manipulation of the hexagon socket 20 can penetrate the upper half shell 20 and the lower half shell 30 completely in the fixing direction 200 Adjustment eccentric 450 are used in the hexagonal recesses 440.
  • a special embodiment of the adjusting eccentric 450 shown in FIG. 7 has modified pivot pins 400. These modified pivots 400 each have teeth 401. The toothing 401 gives the pivot pin 400 an essentially star-shaped cross-sectional shape in the fixing direction 200. A separate embodiment of the bearing eyes 410 supplements the separate toothed embodiment of the pivot pins 400. A detent 402 extending in the horizontal direction 70 projects into the bearing eyes 410.
  • the locking lug 402 engages in the toothing 401 in such a way that the toothing 401 can slide over the locking lug 402 on the one hand when the adjusting eccentric 450 is rotated.
  • the positive engagement of the locking lug 402 in the toothing 401 ensures that the adjusting eccentric 450 is secured in its respective relative position.
  • the parallel arrangement of the locking lug 402 to the connecting arm 370 ensures that the adjustment eccentric is also raised in the adjustment direction and is not laterally displaced in the horizontal direction 70.
  • the adjustment eccentric 450 With an area of its lateral surface 460, the adjustment eccentric 450 lies against the connecting arm 370 and is kinematically connected to it.
  • the area of the lateral surface 460 which has the smallest radial distance from the center 420 is provided with a flat 470 running parallel to the connecting arm 370. If the lateral surface 460 lies with the flat 470 on the connecting arm 370, the adjustment eccentric 450 is in an installation position. In this installation position, the forces acting between the adjusting eccentric 450 and the connecting arm 370 are lowest.
  • the connecting arm 370 By turning the adjusting eccentric 450 clockwise, the connecting arm 370 lies on one of the areas without flattening 470 of the lateral surface 460. The greater the radial distance between the area of the lateral surface 460 lying on the connecting arm 370 and the center 420, the greater the distance between the Connecting arm 370 and the adjustment eccentric 450 acting forces.
  • the trigger sensitivity of the bimetallic strip 330 is adjusted via the deformation of the connecting arm 370 on the basis of the forces acting between the connecting arm 370 and the adjusting eccentric 450.
  • the connecting arm 370 in this case gives its deformation to the fastening leg 360 via the connecting surface Bimetallic strip 330 further such that the vertical part of the bimetallic strip 330 is deformed in the horizontal direction 70 in the direction of the right narrow side 130 with increasing force.
  • the effective overlap between the contact piece 300 and the contact lug 320 is thereby reduced. If the bimetal strip 330 heats up further, it deforms further in the horizontal direction 70 toward the right narrow side 130, as a result of which the contact piece 300 and the contact lug 320 become disengaged (FIG. 3). If the contact piece 300 and the contact lug 320 become disengaged due to an overcurrent occurring, a release spring 480 which is helical about the central longitudinal axis 110 presses the contact bridge 280 like a catapult in the triggering direction 90 in the direction of the switch side 60 490 formed, which causes the contact bridge 280 to be inclined in the switched-off state.
  • the trigger spring 480 is mounted between a support element 510 and a support base 540.
  • the support element 510 is connected to the free end of the release spring 480 facing the switch side 60 via a centering stub 530 formed in the switch-on direction 100.
  • the centering stub 530 centers the release spring 480 approximately about the central longitudinal axis 110.
  • the support element 510 is thus between the release spring 480 and the compression spring 310 positioned next to it in the release direction 90 and forms a one-piece component with the push button 120, the contact bridge 280 and the compression spring 310 out.
  • This component is mounted in web guides 630 formed in the half-shells 20, 30 of the switch housing 40 so that they can be moved in the vertical direction 80.
  • a shield 620 which acts in the direction of the right narrow side 130, protrudes from the support element 510.
  • the shield 620 shields the compression spring 310 from the arc which arises between the contact piece 300 and the contact lug 320 during the tripping.
  • the support base 540 is molded into the switch housing 40, preferably into the lower shell 30, and limits the release spring 480 in the direction of the connection side 50.
  • the support base 540 has a U-shaped cross section running in the horizontal direction 70, the free side of which is in the direction of the switch side 60 points and from which the Release spring 480 protrudes in the release direction 90.
  • In the direction of the connection side 50 is formed on the underside of the support base 540 of the one the bimetallic strip 330 bearing bead projection 350 '.
  • the support base 540 is penetrated by a rivet hole 230.
  • a safety stop 500 protruding toward the interior of the housing is embodied on the vertical arm 270 above the swivel contact 260.
  • the shield 620 facing away from the support element 510 a driver 520 is formed in the direction of the left narrow side 130 '. Due to the inclined position of the contact bridge 280 on the inclined stop 490, the driver 520 and the safety stop 500 come into engagement in the vertical direction 80 when the push button 120 is pressed in the switch-on direction 100. In this way, pivoting back of the contact bridge 280 is prevented even when the push button 120 is held down manually, so that the protective effect of the circuit breaker 10 is fully ensured even when the push button 120 is held down manually.
  • the circuit breaker Only when the bimetallic strip 330 has reformed into its starting position (FIG. 2) can the circuit breaker be brought back into the on position.
  • the push button 120 is pressed in the switch-on direction 100.
  • the contact lug 320 and the contact area 300 come into engagement again, whereby the contact bridge 280 is straightened again, i.e. its horizontal arm 290 runs parallel to the transverse direction 70, and the driver 520 and the safety stop 500 disengage.
  • the circuit breaker 10 also allows manual trip.
  • the manual trigger 150 has a turn leg 550 running in the switched-on position parallel to the horizontal direction 70 and a knuckle leg running at right angles in the vertical direction 80 and designed as a switching cam 560. Due to their right-angled position to one another, the switching cam 560 and the rotating leg 550 form a rocker switch-like rocker switch.
  • the manual release 150 is pivotably mounted in the horizontal recess 70 in two corresponding recesses of the switch housing 40 via two bearing pins 570 protruding from its end faces in the fixing direction 200.
  • the switching cam 560 rests like a finger on the free end of the bimetallic strip 330 lying next to the contact lug 320 in the triggering direction 90.
  • the switching cam 560 simultaneously moves in the horizontal direction 70 in the direction of the right narrow side 130 and, due to its finger-like contact, moves the vertical part of the bimetallic strip 330 in the direction of the right narrow side 130.
  • the contact lug 320 and the contact piece 300 thus become disengaged, as a result of which the contact bridge 280 is catapulted from the release spring 480 in the release direction 90 into its switch-off position according to FIG. 3.
  • the bimetal strip 330 can also be designed as a meander bimetal strip 330 '(FIG. 5, FIG. 6).
  • a plurality of bimetallic webs 580 run parallel to one another in the fixing direction 200. These adjacent bimetallic strips 580 are connected to one another via reversal points 590 in line terms.
  • the effect of an overlong bimetallic strip 330, 330 ' is achieved with a correspondingly large resistance. This large resistance ensures that the heating power required for bimetal heating is achieved when small and very small currents occur.
  • U-shaped metal clamps 600 (shown bent in FIG. 6) with a cross-section are pushed in the fixing direction 200 over the bimetallic strip 330 'in the area of the reversal points 590.
  • the metal clamps 600 are in turn shielded in terms of their lines by insulating clips 610 which are also U-shaped in cross section and are pushed onto them in relation to the connecting arm 370 or the compression spring 310 and the trigger spring 480.
  • the metal clips 600 enclose the bimetallic strip 330 'so firmly that the force acting on the bimetallic strip 330' is the same as that of a "compact" bimetallic strip 330.

Landscapes

  • Thermally Actuated Switches (AREA)
  • Breakers (AREA)
  • Keying Circuit Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Devices For Medical Bathing And Washing (AREA)

Claims (24)

  1. Commutateur de sécurité déclenchable thermiquement
    - avec deux éléments de contact de raccordement (170, 170′) qui font saillie parallèlement d'un côté de raccordement étroit (50) du boîtier (40) du commutateur,
    - avec un bilame (330, 330′) en tant que déclencheur,
    - avec un bras de liaison (370) relié de manière fixe au bilame (330, 330′) et jouant le rôle de bras de levier, et
    - avec un corps rotatif (390) en matière isolante pour le réglage de la sensibilité de déclenchement du bilame (330, 330′), ce corps rotatif :
    -- sollicitant le bras de liaison (370) sous une force de précontrainte,
    -- pouvant être amené à tourner de l'extérieur du commutateur, et
    -- étant situé dans le boîtier (40) du commutateur sans dépassement augmentant la largeur efficace du commutateur,
    caractérisé par les caractéristiques suivantes :
    a) le corps rotatif est monté rotatif de façon excentrée dans le boîtier (40) du commutateur et il repose contre le bras de liaison par une surface enveloppe cylindrique (460) ;
    b) le bras de liaison (370) est enserré dans le boîtier (40) du commutateur par son extrémité libre (371) à la manière d'une monture fixe sensiblement parallèle à la force de précontrainte ;
    c) la surface enveloppe (460) du corps rotatif (390) présente un méplat (470) pour le réglage du zéro ;
    d) les deux éléments de contact de raccordement (170, 170′) s'étendent sensiblement perpendiculairement au bras de liaison (370) ;
    e) le corps rotatif (390) est situé entre les éléments de contact (170, 170′) qui l'encadrent sans contact et le bras de liaison (370), les domaines des éléments de contact (170, 170′) qui encadrent le corps rotatif (390) étant munis d'évidements (380) qui réduisent leur largeur.
  2. Commutateur selon la revendication 1, caractérisé en ce que les plans de mouvement du bilame (330, 330′), du bras de liaison (370) et du corps rotatif (390) sont situés sensiblement dans le plan défini par les éléments de contact de raccordement (170, 170′).
  3. Commutateur selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce que les éléments de contact de raccordement (170, 170′) sont des broches à lames plates.
  4. Commutateur selon une ou plusieurs des revendications précédentes, caractérisé en ce que des crochets à ressort (180, 180′), pour l'enclenchement du commutateur sur un socle à enfichage, dépassent du côté de raccordement (50) du boîtier (40) du commutateur, lesdits crochets à ressort encadrant les éléments de contact de raccordement (170, 170′) suivant leurs côtés longitudinaux opposés l'un à l'autre.
  5. Commutateur (1) selon une ou plusieurs des revendications précédentes, caractérisé en ce que le bilame (330, 330′) présente la forme d'un U situé dans son plan de mouvement et dont les branches sont de longueurs différentes,
    - dont le dos (331) du U qui s'étend dans la direction horizontale (70) est parallèle au bras de liaison (370), et
    - dont la branche de fixation (360), plus courte et s'étendant en direction verticale (80), est reliée de manière fixe à une partie recourbée du bras de liaison (370) qui lui est parallèle.
  6. Commutateur selon une ou plusieurs des revendications précédentes, caractérisé en ce que, dans la position de mise en contact, un pont de contact (280) sensiblement en équerre et monté pivotant dans le plan de mouvement du bilame (330, 330′) dans le boîtier (40) du commutateur, s'appuie par sa pièce de contact (300), portée par un bras horizontal (290) dans la direction de déclenchement (90), contre un taquet de contact (320) formé sur le côté interne de la plus grande branche du U du bilame (330, 330′) sous l'action d'un ressort de déclenchement (480).
  7. Commutateur selon la revendication 6, caractérisé en ce que le pont de contact (280) est situé dans l'espace du boîtier du commutateur qui est laissé libre par la branche la plus courte du bilame (330, 330′).
  8. Commutateur selon une ou plusieurs des revendications précédentes, caractérisé en ce que le dos horizontal du U du bilame (330, 330′) est maintenu en appui contre la partie recourbée (340) de la plus grande branche du U entre deux saillies formant renflement (350, 350′) situées du côté du boîtier,
    - dont la saillie formant renflement (350′) située du côté du commutateur dépasse d'un socle de soutien (540) formé sur le boîtier (40) du commutateur dans la direction de mise en contact (100), et
    - dont la saillie formant renflement (350) située du côté du raccordement est située sous forme de contre-appui entre le bilame (330, 330′) et le bras de liaison (370).
  9. Commutateur selon une ou plusieurs de revendications précédentes, caractérisé en ce que le bras de liaison (370) est serré par son extrémité libre (371) entre deux épaulements (372, 373) formés sur le boîtier (40) du commutateur et qui font saillie dans le commutateur en direction horizontale (70).
  10. Commutateur selon une ou plusieurs des revendications précédentes, caractérisé en ce que le boîtier (40) du commutateur consiste en deux demi-coquilles (20, 30) injectées en matière plastique, les épaulements (372, 373) qui s'étendent en direction horizontale (70) étant moulés par injection sur l'une des demi-coquilles (20, 30).
  11. Commutateur selon une ou plusieurs des revendications précédentes, caractérisé en ce que dans chacune des deux demi-coquilles (20,30) est formé un évidement en forme d'auge (380) pour le corps rotatif (390), et des évidements plats destinés à recevoir les éléments de contact (170, 170′).
  12. Commutateur selon une ou plusieurs des revendications précédentes, caractérisé en ce que l'un des contacts de raccordement (170), le bras de liaison (370), ainsi que le crochet à ressort (180) voisin du contact de raccordement (170) sont d'une pièce, et en ce qu'une nervure (374) du boîtier est située dans l'espace compris entre le contact de raccordement (170) et le crochet à ressort (180).
  13. Commutateur selon la revendication 12, caractérisé en ce que le bras de liaison (370), le contact de raccordement (170) formé sur celui-ci, et le crochet à ressort voisin (180), forment dans le plan du commutateur un composant en forme de π dans lequel le bras de liaison (370) constitue la barre transversale du π.
  14. Commutateur selon la revendication 12 et la revendication 13, caractérisé en ce que l'évidement en forme d'auge (380) borde latéralement le contact de raccordement (170), et l'épaulement (373) situé du côté du raccordement borde latéralement le crochet à ressort (380), et en ce que l'évidement en forme d'auge (380), la nervure (374) et l'épaulement (373) situé du côté du raccordement forment une monture fixe pour le composant en forme de π, ladite monture agissant en direction horizontale (70) et assurant un verrouillage à coopération de formes.
  15. Commutateur selon une des revendications 12 à 14, caractérisé en ce que l'épaulement (372) situé du côté du commutateur, l'épaulement (373) situé du côté du raccordement, le côté frontal de la nervure (374), et la saillie en forme de renflement (350′) située du côté du commutateur forment une monture fixe pour le composant en forme de π, ladite monture agissant en direction verticale (80) et assurant un verrouillage à coopération de formes.
  16. Commutateur selon une ou plusieurs des revendications précédentes, caractérisé en ce que le corps rotatif (390) porte des deux côtés des pivots (400), disposés de façon excentrique et de forme cylindrique, qui sont logés sous forme d'axes de rotation (430) dans les deux coquilles (20, 30) du boîtier.
  17. Commutateur selon une ou plusieurs des revendications précédentes, caractérisé en ce que les côtés frontaux des pivots (400) du corps rotatif (390) portent des empreintes (440) pour l'engagement d'un outil, en particulier une empreinte hexagonale femelle.
  18. Commutateur selon une ou plusieurs des revendications précédentes, caractérisé en ce que le corps rotatif (390) est une plaque de faible épaisseur.
  19. Commutateur selon une ou plusieurs des revendications précédentes, caractérisé en ce que les pivots (400) portent sur la périphérie une denture (401) en dépassement radial, et sont formés à la manière d'une roue dentée.
  20. Commutateur selon la revendication 19, caractérisé par un taquet d'encliquetage (402) sur la périphérie d'au moins une ouverture de palier (410) située du côté du boîtier, pour l'engagement par encliquetage dans la denture (401) des pivots (400) en forme de roues dentées.
  21. Commutateur selon une des revendications 19 ou 20, caractérisé en ce que le taquet d'encliquetage (402) fait saillie vers l'intérieur de l'ouverture de palier (410) en direction horizontale (70).
  22. Commutateur selon une ou plusieurs des revendications précédentes, caractérisé en ce que le bilame (330) consiste en plusieurs bandes de bilame (580) juxtaposées, branchées électriquement en série.
  23. Commutateur selon la revendication 22, caractérisé en ce que les bandes de bilame (580) juxtaposées sont réunies en une pièce monobloc constituée par des bandes de bilame, par une pince (600) qui les entoure.
  24. Commutateur selon une ou plusieurs des revendications précédentes, caractérisé en ce que le bilame (330) est sous forme d'un bilame sinueux (330′).
EP91104014A 1990-04-06 1991-03-15 Disjoncteur commandé par bouton-poussoir Expired - Lifetime EP0450366B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE9004031U 1990-04-06
DE9004031U DE9004031U1 (de) 1990-04-06 1990-04-06 Druckknopfbetätigter Überstromschalter
DE9017292 1990-12-21
DE9017292U 1990-12-21

Publications (2)

Publication Number Publication Date
EP0450366A1 EP0450366A1 (fr) 1991-10-09
EP0450366B1 true EP0450366B1 (fr) 1995-05-17

Family

ID=25956475

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91104014A Expired - Lifetime EP0450366B1 (fr) 1990-04-06 1991-03-15 Disjoncteur commandé par bouton-poussoir

Country Status (6)

Country Link
US (1) US5153552A (fr)
EP (1) EP0450366B1 (fr)
JP (1) JPH0675365B2 (fr)
KR (1) KR0143979B1 (fr)
AT (1) ATE122818T1 (fr)
DE (1) DE59105486D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10103788A1 (de) * 2001-01-29 2002-08-22 Ellenberger & Poensgen Thermisch auslösbarer Schutzschalter

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5633618A (en) * 1995-10-24 1997-05-27 Chuang; Wen-Pin Fuseless plug with safety circuit breaker
TW450419U (en) * 1999-02-12 2001-08-11 You Tsung Mou Key-type interruptible safety switch
TW446174U (en) * 1999-02-12 2001-07-11 You Tsung Mou Simplified push-button type breaker switch
US6747534B1 (en) * 1999-08-18 2004-06-08 Eaton Corporation Circuit breaker with dial indicator for magnetic trip level adjustment
EP1202317A1 (fr) * 2000-10-23 2002-05-02 ABL SURSUM BAYERISCHE ELEKTROZUBEHÖR GmbH & Co. KG Disjoncteur avec calibrage du bimétal
US6496095B2 (en) * 2001-03-08 2002-12-17 Tsung-Mou Yu Switch with an override interruption structure
DE10213269A1 (de) * 2002-03-25 2003-10-23 Infineon Technologies Ag Zufallszahlengenerator
US6888441B2 (en) * 2003-08-28 2005-05-03 Emerson Electric Co. Apparatus adapted to be releasably connectable to the sub base of a thermostat
DE102008049507A1 (de) * 2008-09-29 2010-04-01 Ellenberger & Poensgen Gmbh Miniatur-Schutzschalter
DE202011110510U1 (de) * 2010-09-24 2014-05-27 Ellenberger & Poensgen Gmbh Miniatur-Schutzschalter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3265832A (en) * 1964-01-16 1966-08-09 Gen Electric Electrical control device with adjustable calibration locking means
DE2511223C2 (de) * 1975-01-23 1978-02-09 Ellenberger & Poensgen Gmbh, 8503 Altdorf Druckknopfbetätigter Überstromschalter mit thermischer Auslösung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10103788A1 (de) * 2001-01-29 2002-08-22 Ellenberger & Poensgen Thermisch auslösbarer Schutzschalter

Also Published As

Publication number Publication date
ATE122818T1 (de) 1995-06-15
JPH04230925A (ja) 1992-08-19
KR0143979B1 (ko) 1998-08-17
EP0450366A1 (fr) 1991-10-09
US5153552A (en) 1992-10-06
JPH0675365B2 (ja) 1994-09-21
KR910019079A (ko) 1991-11-30
DE59105486D1 (de) 1995-06-22

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