EP2779196B1 - Miniature circuit breaker - Google Patents
Miniature circuit breaker Download PDFInfo
- Publication number
- EP2779196B1 EP2779196B1 EP14002033.0A EP14002033A EP2779196B1 EP 2779196 B1 EP2779196 B1 EP 2779196B1 EP 14002033 A EP14002033 A EP 14002033A EP 2779196 B1 EP2779196 B1 EP 2779196B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit breaker
- push button
- contact
- driver
- separating
- 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.)
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- 238000005859 coupling reaction Methods 0.000 claims description 2
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- 230000006835 compression Effects 0.000 description 30
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- 238000006073 displacement reaction Methods 0.000 description 5
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- 230000008859 change Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
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- 229910001369 Brass Inorganic materials 0.000 description 1
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- 239000010951 brass Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Images
Classifications
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- 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
- H01H73/303—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 with an insulating body insertable between the contacts when released by a bimetal element
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
- H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
- H01H37/5409—Bistable switches; Resetting means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
- H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
- H01H37/5418—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting using cantilevered bimetallic snap elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
- H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
- H01H37/5427—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting encapsulated in sealed miniaturised housing
-
- 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
- H01H71/16—Electrothermal mechanisms with bimetal element
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
- H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
- H01H2037/5463—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting the bimetallic snap element forming part of switched circuit
-
- 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
- H01H71/08—Terminals; Connections
- H01H2071/088—Terminals for switching devices which make the devices interchangeable, e.g. with fuses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49105—Switch making
Definitions
- the invention relates to a miniature circuit breaker according to the preamble of claim 1, as used for example in the context of an automotive electrical system.
- Such circuit breakers are increasingly being used as a replacement for the automotive industry earlier standard flat fuses.
- Flachsteckschschen used in the automotive industry are standardized in terms of their geometric dimensions.
- the relevant norm in Germany is DIN 72581-3.
- ISO 8820 is currently being prepared in this area. In the latter standard, three sizes are defined for the flat-type fuses, namely "Type C (medium)”, “Type E (high current)” and “Type F (miniature)”.
- Circuit breakers of the above-mentioned type are usually based on the standards developed for flat-type fuses in order to ensure the compatibility of the circuit breakers with plug-in sockets for blade-type fuses.
- a miniature circuit breaker is generally referred to here a circuit breaker, which is compatible in terms of its geometric dimensions with a socket for a Flachsteckêt, in particular a Flachsteck mixer the (smallest) type F according to ISO 8820.
- Such circuit breakers are sold, for example, by the company Cooper Bussmann under the name "Series 21 X mini circuit breaker".
- Circuit breakers of the abovementioned type usually comprise as tripping mechanism a bimetallic snap-action disc, which changes suddenly and reversibly between two curvature positions as a function of the temperature.
- the Bimetallschnappulation is firmly connected in one or more attachment points with a Bimetallkingarm. That of the attachment point (s) opposite free end of Bimetallschnappulation forms or carries a moving contact.
- the Bimetallschnappulation is arranged such that the moving contact is applied to a corresponding fixed contact of a FestWalletarms, as long as the temperature prevailing in the circuit breaker temperature falls below a predetermined building temperature threshold. In this case, an electrically conductive path between the bimetallic contact and the fixed contact is thus closed via the Bimetallschnappulation.
- the Bimetallschnappulation abruptly changes its shape, whereby the moving contact lifted from the fixed contact and the current path is thus separated.
- circuit breakers In simple circuit breakers of the type mentioned above, the closure or interruption of the current path takes place exclusively by the temperature-induced change in shape of the bimetallic snap disk.
- Such circuit breakers work in persistent overload condition, so for example in the case of a persistent even after the first triggering of the circuit breaker intermittently, especially since the circuit breaker gradually cools after tripping, causing the Bimetallschnappulation closes the circuit again, and thus the tripping cycle of the circuit breaker again abuts.
- separation mechanisms are currently known only for relatively large circuit breaker (eg compatible with ISO 8820 type C) and, for example, in DE 35 26 785 C1 or EP 1 278 226 B1 described.
- a circuit breaker according to the preamble of claim 1 is in particular from US 6,144,541 A known.
- the invention has for its object to provide a particularly suitable for miniaturization, especially easy to manufacture and functionally reliable circuit breaker.
- the circuit breaker comprises a housing which is formed from a housing base made of insulating material as well as from an attachable to the housing base or attached housing cover.
- the housing cover is in this case pot-shaped and thus - at least substantially - closed on all of the housing base facing away from five sides.
- two elongate and flat contact arms are partially embedded and parallel to each other with respect to their longitudinal direction.
- a fixed contact is arranged at an inner end of a first of the two contact arms.
- a fastening point is arranged, on which a Bimetallschnapplicate is mounted, wherein the Bimetallschnappulation forms a moving contact in the region of its free end (or a separate moving contact) carries.
- the Bimetallschnappulation is in this case arranged in the housing, that the attachment point and the moving contact lie on a common, parallel to the longitudinal extent of the contact arms axis.
- the separator biasing spring is a helical compression spring.
- This helical compression spring is mounted on a guide pin made of metal, which extends at least substantially over the entire spring length.
- This embodiment is based on the finding that the use of a helical compression spring for reasons of high reliability and high ease of assembly is desirable on the one hand, but that such helical compression springs on the other hand in the required miniaturization are not kinking and therefore require guidance.
- the spring-penetrating metallic guide pin forms an extremely space-saving, yet effective way of guiding the helical compression spring.
- particularly simple embodiment of the guide pin is integrally formed with one of the contact arms, in particular the Fest.
- the guide pin protrudes through the spring into a guide bore of the separating element, in particular the push button, into it, wherein in particular the cross section of the guide bore is approximately adapted to the cross section of the guide pin.
- the guide pin thus advantageously also serves for direct guidance of the separating element.
- the separating element is additionally or alternatively, in particular in the region of the separating plate, expediently (also) on a mecanicsgrat the other contact arm, in particular so the Bimetalltakingarms out.
- the separating element advantageously has a fork-like guide contour, which engages around the guide ridge in a form-fitting manner.
- the "threading" the guide contour on the senatorsgrat is thereby expediently simplified in that the guide contour has two longitudinally offset guide tines. This embodiment also simplifies the production of the separating element by injection molding.
- the Stanfordsgrat may alternatively be formed on the base.
- the push button and the partition plate are not integral, but designed as separate, mutually displaced guided components.
- the push button in this case has a driver, which is guided so that it moves the separating plate in the release position upon depression of the push button from its extended position to its depressed position, but that when the depressed position of the push button, the driver is decoupled from the separator plate , By decoupling the driver from the partition plate, a so-called free release of the partition plate is achieved.
- the separating function of the partition plate can not be rendered ineffective by the fact that the push button is kept permanently in its depressed state. A malfunction of the circuit breaker by abusive or accidentally depressed push button is therefore excluded.
- the driver is preferably guided on a closed circular path, so that he takes a different path when pressing the push button than when Jump back the push button in the extended position.
- the driver is guided in particular on a guide ridge, which is formed integrally with one of the contact arms, in particular the BimetallANDarm.
- the driver is preferably guided around this ring guide annularly.
- this is expediently provided with two with respect to the displacement direction of the push button obliquely hired, in particular approximately parallel sliding surfaces. These sliding surfaces are arranged with respect to the above-mentioned Systemssgrates that the driver is deflected when pressing the push button and when extending the push button on each other flat side of the contact arm.
- the driver is preferably connected elastically deflectable with the push button.
- the driver is integrally connected via an integrally formed on the push button spring arm with this.
- the contact arm is provided with an incision through which the driver jumps back to a rest position when the push button has reached its depressed position, so that the driver is quickly and safely decoupled from the partition plate.
- the push button advantageously additionally has a second driver.
- This second driver is arranged such that it abuts in the extension of the push button on the partition plate, so that the push button is held by the partition plate in the depressed position, as long as the partition plate is in the release position.
- both parts are separately biased by a separate helical compression spring in the direction of the separation position of the partition plate or on the extended position of the push button in a separate embodiment of the partition plate and the push button.
- Each of these two helical compression springs is hereby placed in the sense of an easily miniaturizable and effective guidance on a separate guide pin of one of the contact arms.
- both helical compression springs are guided on the same contact arm, in particular the fixed contact arm.
- the circuit breaker 1 comprises in this embodiment a housing 2, which is formed from a housing base 3 and a housing cover 4.
- the circuit breaker 1 further comprises a Fest.arm 5, a BimetallKINGarm 6 and a Bimetallschnappulation 7.
- the circuit breaker 1 also includes a fixed contact 8 in the form of a weld plate, a moving contact 9 in the form of a rivet and for attaching the Bimetallschnappulation 7 another rivet 10 and another Welding plate 11.
- the housing base 3 and the housing cover 4 are made of electrical insulating material, namely a thermoplastic material.
- the one-piece housing cover 4 is pot-shaped and thus encloses with five closed walls a volume which defines an interior 12 (indicated by a dashed reference arrow) of the circuit breaker 1.
- the housing cover 4 can be snapped onto the housing base 3 with its open side.
- Fig. 2 shows the circuit breaker 1 with the housing 2 closed, ie with attached to the housing base 3 housing cover 4th
- the contact arms 5 and 6 are bent-stamped parts made of sheet metal, in particular tinned brass, with a flat, rectangular cross-section.
- the housing base 3 of the Fest.arm 5 and the Bimetallkingarm 6 are positively embedded by the contact arms 5 and 6 are encapsulated with the material of the Gezzauesockels 3 in the manufacture of the circuit breaker 1.
- the contact arms 5 and 6 protrude on an underside 13 of the housing base 3, each with a plug contact 14 from the housing base 3 to the outside.
- the housing 2, in particular the housing cover 4 have approximately the shape of a flat square with a (housing) narrow side 15 and a (housing) broadside 16.
- the contact arms 5 and 6 are embedded in the housing base 3 in such a way that the plug contacts 14 parallel to each other and with respect to the housing narrow side 15 are arranged approximately centrally and at a distance from each other.
- the circuit breaker 1 is based on the standard ISO 8820 type F (miniature) in terms of its external geometrical dimensions, ie corresponds from the outside a type F flat fuse according to this standard, so that the circuit breaker 1 is compatible with a socket for such Flachsteckêt, i. in such a socket can be inserted.
- the plug contacts 14 of the contact arms 5 and 6 are each arranged at the edge.
- both contact arms 5 and 6 are each guided inwardly toward the housing center, so that an inner end 17 of the Fest.arms 5 is disposed over an inner end 18 of the Bimetallkingarms 6.
- top here - regardless of the actual orientation of the circuit breaker 1 in the room - the side facing away from the housing base 3 and the plug contacts 14 side of the circuit breaker 1 is designated.
- the inner ends 17 and 18 of the contact arms 5 and 6 are - as in particular from Fig. 3 can be seen - in the direction of the housing broadside 16 centered with respect to a central longitudinal axis 19 ( Fig. 3 ) of the housing 2.
- transverse direction 22 The longitudinal extent of the contact arms 5 and 6, and in particular of the plug contacts 14 of these contact arms 5 and 6, defines a longitudinal direction 21.
- the direction perpendicular to the longitudinal direction 21 within the center plane 20 is referred to below as transverse direction 22:
- the housing base 3 in the transverse direction 22 each edge, and thus approximately in extension of the plug contacts 14, two of a base plate 23 in the interior 12 projecting arms 24 and 25, wherein the Fest.arm 5 in the arm 24 and the Bimetallkingarm 6 are embedded in the arm 25.
- the arms 24 and 25 can - again in the transverse direction 22 seen - between them a free space 26, in which the inner ends 17 and 18 of the contact arms 5 and 6 protrude.
- both ends 17 and 18 of the contact arms 5 and 6 are free from the base 3 in the interior 12 from.
- ELId lake is at a distance from the housing base 3, (also ELId lake) at the inner end 17 of the Fest.arms 5 of the fixed contact 8 is welded.
- ELId lake is at the inner end 18 of the contact arm 6 - thus again at a distance from the housing base 3 - the rivets 10 attached (see in particular Fig. 3 and 4 ).
- the Bimetallschnappulation 7 is welded by means of the welding plate 11 (see in particular Fig. 5 or 6 ).
- the Bimetallschnappulation is in this case in the assembled state - as in particular in the Fig. 7 and 8th recognizable - sandwiched between the rivet 10 and the Welding plate 11 is arranged.
- the oval-shaped bimetallic snap disk 7 is arranged with respect to its longitudinal extension - in the direction of the housing broadside 16 - centered with the central longitudinal axis 19 (see Fig. 5 ).
- the moving contact 9 and the spatially coincident with the rivet 10 attachment point 34 of the Bimetallschnappulation 7 are thus aligned in particular parallel to the longitudinal direction 21 of the circuit breaker 1 and its contact arms 5 and 6.
- the opposite longitudinal end of the Bimetallschnappulation 7 is free in the interior 12 and is referred to as free end 28 accordingly.
- free end 28 carries the Bimetallschnappulation 7 in juxtaposition to the fixed contact 8 and on its fixed contact 8 side facing the moving contact 9 (see in particular Fig. 7 and 8th ; in the illustration according to Fig. 5 is not visible moving contact 9 only indicated by dashed lines).
- the Bimetallschnappulation 7 is further formed such that it changes its shape abruptly when its temperature exceeds a design predetermined default trip temperature of preferably 1700 ° C. This change in shape takes place in such a way that the moving contact 9 is lifted off the fixed contact 8, and thus the electrical connection existing between the fixed contact arm 5 and the bimetallic contact arm 6 is disconnected.
- Fig. 8 shows the circuit breaker 1 in the tripped position.
- the change in shape of the Bimetallschnappulation 7 is reversible depending on their temperature, so that the Bimetallschnapplite 7 in the normal position according to Fig. 7 springs back when its temperature falls below a building-specific predetermined return temperature.
- this optionally has a snap hysteresis, in which the return temperature is lower than the release temperature.
- the circuit breaker is therefore only at a low compared to the triggering temperature return temperature conductive again.
- the punched, curved in shape and provided with the fixed contact 8 and the rivets 10 contact arms 5 and 6 with the housing base 3 are encapsulated and thus embedded in this.
- the Bimetallschnappulation 7 provided with the moving contact 9 is welded to the BimetallWalletarm 6 - more precisely to the rivet 10 -.
- the Bimetallschnappulation 7 is first welded so that the moving contact 9 is spaced from the fixed contact 8 or only loosely rests on this, so that the Bimetallschnappulation 7 is not initially under a bias.
- the required bias of the Bimetallschnappulation 7 in the normal state is produced only in a subsequent manufacturing step by the inner end 18 of the Bimetallkingarms 6 about a 22 extending in the transverse direction and from the housing base 3 sufficiently spaced buckling axis 29 (see Fig. 3 and 5 ) is bent over.
- the bending of the end 18 takes place in the representation of the Fig. 3 and 5 to the rear, and thus in the direction of the end 17 of the Fest.arms 5.
- the bending is preferably controlled, wherein the bending process is continued until the Bimetallschnappulation 7 has reached a predetermined target bias.
- the bend of the end 18 thus allows an adjustment of the circuit breaker 1, compensated by the manufacturing tolerances, especially in the embedding of the contact arms 5 and 6 in the housing base 3, and a uniform, precise tripping behavior of the circuit breaker 1 can be ensured.
- the housing cover 4 is snapped onto the housing base 3.
- the circuit breaker 1 operates intermittently.
- the Bimetallschnapplite 7 heated by the electrical power loss until the triggering temperature is exceeded, and the Bimetallschnapplite 7 by sudden change in shape separates the circuit. Due to the now forcibly collapsing current flow occurs a gradual cooling of the circuit breaker 1, and thus the bimetallic snap 7.
- the bimetallic snap disk 7 returns to the normal position, whereby the circuit is closed again.
- the overload condition in particular the short circuit
- the plastic housing cover 4 which effectively thermally insulates the interior 12 of the circuit breaker 1. Due to the thermally insulating housing 2, the turn-off of the circuit breaker 1 is extended in case of overload, since the cooling of the bimetallic snap disk 7 is slowed down after the release. Thus, both protected by the circuit breaker 1 circuit and the circuit breaker 1 itself is spared.
- a second variant of the circuit breaker 1 is based on Fig. 9 to 15 described.
- This second variant is similar in terms of construction, assembly and function - unless otherwise described below - in the first variant.
- the housing base 3, the contact arms 5 and 6, the Bimetallschnappulation 7, the fixed contact 8, the moving contact 9, and the rivet 10 and the welding pad 11 are identical to the corresponding parts of the embodiment described above.
- the second variant of the circuit breaker 1 according to the Fig. 9 to 15 but a separator 36 and a helical compression spring 37th
- the separating element 36 is designed as a one-piece plastic injection molded part and essentially comprises a separating plate 38 and a push button 39.
- the housing cover 4 corresponds essentially to the housing cover 4 of the variants of the circuit breaker 1 described above, but deviating from this in its upper surface has a recess 40 through which the push button 39 of the separating element 36 protrudes from the housing 2 in the installed state.
- the Fig. 10 shows the circuit breaker 1 in the assembled state, and in particular protruding from the housing 2 pushbutton 39th
- the helical compression spring 37 and the push button 39 are guided on the Festutton 5.
- the fixed contact arm 5 has for this purpose two thin, elongated guide pins 41 and 42.
- the helical compression spring 37 is in this case pushed onto the outer guide pin 41 (see in particular Fig. 11 ).
- the push button 39 is pushed onto the guide pins 41 and 42, so that the helical compression spring 37 sandwiched between the arm 24 of the housing base 2 and the push button 39 (see Fig. 12 ).
- the push button 39 has an adaptation to the dimensions of the pins 41 and 42 substantially receptacle.
- This receptacle is optionally formed of two separate holes for receiving one of the guide pins 41 and 42 or through a slot-shaped opening in which both guide pins 41 and 42 eino together.
- the partition plate 38 In the installed position of the separating element 36, the partition plate 38 is approximately in the transverse direction 22 from the push button 39 and is approximately co-planar with the median plane 20 the inner end 17 of the Fest.arms 5 upstream (see Fig. 12 ). It is thus in particular between the inner end 17 of the Fest.arms 5 and the Bimetallschnappgrade 7.
- the partition plate 38 At its in the transverse direction 22 facing away from the push button 39 edge, the partition plate 38 is guided on the inner edge of a longitudinal extension 33 of the contact arm 6, which is approximately in extension of the plug 14 in the interior 12. This inner edge thus forms a wishessgrat 43 for the partition plate 38.
- the partition plate 38 engages around this foundedsgrat 43 with an integrally formed, fork-like guide contour 44.
- This guide contour 44 has two, the constitutivesgrat 43 front and rear embracing tines 45 and 46 (see in particular Fig. 14 ).
- the two prongs 45 and 46 of the guide contour 44 are - as in particular from Fig. 15 is recognizable - in the longitudinal direction 21 slightly offset from each other to facilitate the "threading" of the guide contour 44 on the foundedsgrat 43 of the longitudinal extension 33.
- the separating element 36 is displaceably guided on the guide pins 41 and 42 as well as on the guide ridge 43 in the longitudinal direction 21 between a separating position and a release position.
- the partition plate 38 is disposed below the fixed contact 8 and the moving contact 9. More precisely, the partition plate 38 - seen in the longitudinal direction 21 - between the fixed contact 8 and the moving contact 9 on the one hand and the end 18 of the contact arm 6 and the attachment point 34 of the Bimetallschnappulation 7 is arranged. The partition plate 38 is thus withdrawn from the area of the fixed contact 8 and the moving contact 9, so that the moving contact 9 can touch the fixed contact 8 unhindered.
- the separating position is the separating element 36 (compared to the illustration in FIG Fig. 12 ) Move upward, so that the partition plate 38 rests between the fixed contact 8 and the moving contact 9.
- the separating element 36 is biased by the helical compression spring 37 upwards, ie in the direction of the release position. Under the spring pressure, the separating element 36 automatically assumes the disconnected position when, when the circuit breaker 1 is triggered, the moving contact 9 is lifted off the fixed contact 8.
- the partition plate 38 thus pushes between the fixed contact 8 and the moving contact 9 and prevents that upon cooling of the Bimetallschnappulation. 7 the electrical connection between the fixed contact 8 and the moving contact 9 is closed again.
- the release position of the partition plate 38 corresponds to a position of the push button 39, in which the push button 39 is flush with the upper edge of the housing cover 4 or protrudes only slightly from the housing 2 to the outside. This position of the push button 39 is referred to as depressed position.
- the separating position of the partition plate 38 corresponds to a position of the pushbutton 39, in which - if appropriate - protrudes from the housing 2 as in the depressed position.
- This position of the push button 39 is hereinafter referred to as "extended position”.
- the partition plate 38 is at least on its bimetallic snap disk 7 facing front with a sharp upper edge (hereinafter referred to as contact edge 47) provided with the partition plate 38 on the Moving contact 9 is present.
- the abutment edge 47 is for this purpose in particular, as from the Fig. 12 and 15 emerges outward, thus on the bimetallic snap disk 7, obliquely employed.
- the displacement of the push button 39 is limited downwards by a stop 48 which is integrally formed on the arm 24 of the housing base 3.
- the stop 48 flanks the helical compression spring 37 and is dimensioned sufficiently long to preclude crushing of the helical compression spring 37.
- the displacement of the push button 39 is limited by stops 49 which are integrally formed at the lower end of the push button 39, and with which the push button 39 abuts in the extended position on the housing cover 4.
- FIG. 16 to 24 A further improved variant of the above-described embodiment of the circuit breaker 1 is in the Fig. 16 to 24 shown.
- the partition plate 38 and the push button 39 of the separating element 36 are realized as separate components, which are guided displaceable relative to one another in order to enable a free release of the circuit breaker 1.
- the housing base 3, the fixed contact 5, the Bimetallschnappulation 7, the fixed contact 8, the moving contact 9, the rivets 10 and the welding plate 11 are in turn identical to the corresponding parts of the embodiments described above.
- the BimetallKeyarm 6 is formed substantially identical to the Bimetallnapsarm 6 of the embodiments described above. Notwithstanding this, only the longitudinal extension 33 is according to Fig.
- a recess 50 is formed.
- the housing cover 4 substantially corresponds to the housing cover 4 according to Fig. 9 , Only the shape of the recess 40 is - in accordance with a in the embodiment according to Fig. 16 to 24 modified cross section of the push button 39, which here essentially has the shape of a letter "H" - modified.
- the closed housing 2 with the protruding from the housing 2 push-button 39 is in Fig. 17 shown.
- the partition plate 38 For biasing the partition plate 38 comprises the circuit breaker 1 in the embodiment according to the Fig. 16 to 24 an additional helical compression spring 51, which - is pushed parallel to the helical compression spring 37 - on the guide pin 42 (see Fig. 18 ).
- the push button 39 comprises an integrally formed transverse strut 52, which in the assembled state (see Fig. 19 ), the partition plate 38 engages under.
- the guide contour 44 is formed, which - in particular for preventing rotation of the push button 39 - as described above, the foundedsgrat 43 below the incision 50 surrounds.
- spring arm 53 is further formed, which is provided at its free end with a driver 54. In the assembled state, the spring arm 53 extends at a small distance from the guide ridge 43 approximately parallel to the longitudinal extension 33 (FIG. Fig. 19 ), wherein the driver 54 overlaps in the transverse direction 22 with the foundedsgrat 43.
- a support arch 55 is formed on the partition plate 38, which vaulted over the actual partition plate 38.
- a fork-like guide projection 56 which engages around the guide mandrel 42 in a form-fitting manner in the assembled state.
- This guide projection 56 serves at the same time as an abutment for the helical compression spring 51, via which the helical compression spring 51 initiates a spring plate, the biasing plate 38 in the direction of its separation position.
- the push button 39 is guided on FestAutharm 5 only by the guide pin 41, which stands for this purpose in a corresponding opening of the push button 39.
- the guide pin 42 and the patch on this coil spring 51 extend without direct interaction with the push button 39 in a recess 57 (FIG. Fig. 19 ) of the latter.
- Fig. 21 In this case, first shows the circuit breaker 1 in the released state, wherein the push button 39 is in its extended position, and the partition plate 38 in the disconnected position between the moving contact 9 and the fixed contact 8 not visible here.
- the free end 59 of the driver arm 58 is aligned approximately with the free end 60 of the longitudinal extension 33.
- the driver 54 however, - arranged in extension of the plane defined by the longitudinal extension 33 - above its free end 60.
- the spring arm 53 thus protrudes beyond the longitudinal extension 33 in this state.
- the spring arm 53 is in this case in a relaxed state (also referred to as idle state).
- the driver 54 has, as in particular from the Fig. 21 to 24 becomes clear, a roughly diamond-shaped cross-section.
- the downward or upward surfaces 61 and 62 are aligned obliquely to the longitudinal direction 21 and serve as Abgleitschrägen, where the driver 54 is deflected by the Stanfordsgrat 43.
- the driver 54 When pressing the push button 39, the driver 54 first encounters the upper edge of the longitudinal extension 33 formed at the free end 60. Due to the inclination of the surface 61 and a corresponding inclination of the upper edge of the longitudinal extension 33 of the driver 54 is under deflection of the spring arm 53rd deflected towards the back of the longitudinal extension 33. He meets here on the free end 59 of Mit Conversearms 54 and moves it with continued pressing the push button 39 down (see Fig. 22 ). With the Mitauerarm 58 and the partition plate 38 is moved downward, in the direction of their release position.
- the separating plate 38 is again moved under the pressure of the helical compression spring 51 into its separating position, even if the push-button 39 is still held in its depressed position.
- the displacement of the push button 39 is limited by the partition plate 38 by the push button 39 abuts with the top of its cross member 52 at the lower edge of the partition plate 38.
- the crossbar 52 thus forms another driver, which locks the push button 39 in its depressed position, as long as the partition plate 39 is in its release position.
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Description
Die Erfindung bezieht sich auf einen Miniatur-Schutzschalter nach dem Oberbegriff des Anspruchs 1, wie er beispielsweise im Rahmen einer Automobil-Elektrik eingesetzt wird. Solche Schutzschalter finden zunehmend als Ersatz für die im Automobilbereich früher standardmäßig eingesetzten Flachstecksicherungen Verwendung.The invention relates to a miniature circuit breaker according to the preamble of
Die im Automobilbereich eingesetzten Flachstecksicherungen sind hinsichtlich ihrer geometrischen Abmessungen genormt. Die diesbezüglich in Deutschland noch gültige Norm ist die DIN 72581-3. Derzeit vorbereitet wird auf diesem Gebiet die internationale Norm ISO 8820. In der letztgenannten Norm werden für die Flachstecksicherungen drei Größen, nämlich "Type C (medium)", "Type E (high current)" und "Type F (miniature)" definiert.The Flachstecksicherungen used in the automotive industry are standardized in terms of their geometric dimensions. The relevant norm in Germany is DIN 72581-3. The international standard ISO 8820 is currently being prepared in this area. In the latter standard, three sizes are defined for the flat-type fuses, namely "Type C (medium)", "Type E (high current)" and "Type F (miniature)".
Schutzschalter der oben genannten Art lehnen sich üblicherweise an die für Flachstecksicherungen entwickelten Normen an, um die Kompatibilität der Schutzschalter mit Stecksockeln für Flachstecksicherungen sicherzustellen. Als Miniatur-Schutzschalter wird hier allgemein ein Schutzschalter bezeichnet, der hinsichtlich seiner geometrischen Abmessungen kompatibel mit einer Steckbuchse für eine Flachstecksicherung, insbesondere einer Flachstecksicherung des (kleinsten) Typs F gemäß ISO 8820 ist. Derartige Schutzschalter werden beispielsweise von der Firma Cooper Bussmann unter der Bezeichnung "Series 21 X mini circuit breaker" vertrieben.Circuit breakers of the above-mentioned type are usually based on the standards developed for flat-type fuses in order to ensure the compatibility of the circuit breakers with plug-in sockets for blade-type fuses. As a miniature circuit breaker is generally referred to here a circuit breaker, which is compatible in terms of its geometric dimensions with a socket for a Flachstecksicherung, in particular a Flachstecksicherung the (smallest) type F according to ISO 8820. Such circuit breakers are sold, for example, by the company Cooper Bussmann under the name "Series 21 X mini circuit breaker".
Schutzschalter der oben genannten Art umfassen als Auslösemechanik üblicherweise eine Bimetallschnappscheibe, die in Abhängigkeit der Temperatur sprunghaft und reversibel zwischen zwei Krümmungsstellungen wechselt. Die Bimetallschnappscheibe ist in einem oder mehreren Befestigungspunkten fest mit einem Bimetallkontaktarm verbunden. Das von dem bzw. den Befestigungspunkten abgewandte Freiende der Bimetallschnappscheibe bildet oder trägt einen Bewegkontakt. Die Bimetallschnappscheibe ist dabei derart angeordnet, dass der Bewegkontakt an einem korrespondierenden Festkontakt eines Festkontaktarms anliegt, solange die in dem Schutzschalter vorherrschende Temperatur einen baubedingt vorgegebenen Temperaturschwellwert unterschreitet. In diesem Fall ist somit über die Bimetallschnappscheibe ein elektrisch leitender Pfad zwischen dem Bimetallkontakt und dem Festkontakt geschlossen. Sobald infolge eines Überstroms die im Schutzschalter vorherrschende Temperatur den Temperaturschwellwert überschreitet, ändert die Bimetallschnappscheibe sprunghaft ihre Form, wodurch der Bewegkontakt von dem Festkontakt abgehoben und der Strompfad somit getrennt wird.Circuit breakers of the abovementioned type usually comprise as tripping mechanism a bimetallic snap-action disc, which changes suddenly and reversibly between two curvature positions as a function of the temperature. The Bimetallschnappscheibe is firmly connected in one or more attachment points with a Bimetallkontaktarm. That of the attachment point (s) opposite free end of Bimetallschnappscheibe forms or carries a moving contact. The Bimetallschnappscheibe is arranged such that the moving contact is applied to a corresponding fixed contact of a Festkontaktarms, as long as the temperature prevailing in the circuit breaker temperature falls below a predetermined building temperature threshold. In this case, an electrically conductive path between the bimetallic contact and the fixed contact is thus closed via the Bimetallschnappscheibe. As soon as due to an overcurrent prevailing in the circuit breaker temperature exceeds the temperature threshold, the Bimetallschnappscheibe abruptly changes its shape, whereby the moving contact lifted from the fixed contact and the current path is thus separated.
Bei einfachen Schutzschaltern der oben genannten Art erfolgt die Schließung oder Unterbrechung des Strompfades ausschließlich durch die temperaturbedingte Formänderung der Bimetallschnappscheibe. Solche Schutzschalter arbeiten bei fortbestehender Überlastbedingung, also beispielsweise im Falle eines auch nach dem erstmaligen Auslösen des Schutzschalters fortbestehenden Kurzschlusses, intermittierend, zumal sich der Schutzschalter nach dem Auslösen allmählich abkühlt, wodurch die Bimetallschnappscheibe den Strompfad wiederum schließt, und somit den Auslösezyklus des Schutzschalters von neuem anstößt.In simple circuit breakers of the type mentioned above, the closure or interruption of the current path takes place exclusively by the temperature-induced change in shape of the bimetallic snap disk. Such circuit breakers work in persistent overload condition, so for example in the case of a persistent even after the first triggering of the circuit breaker intermittently, especially since the circuit breaker gradually cools after tripping, causing the Bimetallschnappscheibe closes the circuit again, and thus the tripping cycle of the circuit breaker again abuts.
Aufwändiger gestaltete Schutzschalter der oben genannten Art enthalten zusätzlich zu der Bimetallschnappscheibe einen Trennmechanismus, der sich beim Auslösen des Schutzschalters zwischen den Bewegkontakt und den Festkontakt schiebt, so dass auch nach dem Rückschnappen der Bimetallschnappscheibe der Stromkreis unterbrochen bleibt. Derartige Trennmechanismen sind derzeit lediglich für vergleichsweise große Schutzschalter (z.B. kompatibel mit ISO 8820 Typ C) bekannt und beispielsweise in
Ein Schutzschalter nach dem Oberbegriff des Anspruchs 1 ist dabei insbesondere aus
Ferner ist aus
Der Erfindung liegt die Aufgabe zugrunde, einen für die Miniaturisierung besonders geeigneten, insbesondere einfach herstellbaren und funktionssicheren Schutzschalter anzugeben.The invention has for its object to provide a particularly suitable for miniaturization, especially easy to manufacture and functionally reliable circuit breaker.
Diese Aufgabe wird erfindungsgemäß gelöst durch die Merkmale des Anspruchs 1. Danach umfasst der Schutzschalter ein Gehäuse, das aus einem Gehäusesockel aus Isoliermaterial sowie aus einem auf den Gehäusesockel aufsetzbaren bzw. aufgesetzten Gehäusedeckel gebildet ist. Der Gehäusedeckel ist hierbei topfartig ausgebildet und somit - zumindest im Wesentlichen - auf allen von dem Gehäusesockel abgewandten fünf Seiten geschlossen. In den Gehäusesockel sind zwei längliche und flache Kontaktarme teilweise und hinsichtlich ihrer Längsrichtung parallel zueinander eingebettet. An einem inneren Ende eines ersten der beiden Kontaktarme ist hierbei ein Festkontakt angeordnet. An einem inneren Ende des zweiten Kontaktarms ist ein Befestigungspunkt angeordnet, an dem eine Bimetallschnappscheibe angebracht ist, wobei die Bimetallschnappscheibe im Bereich ihres Freiendes einen Bewegkontakt bildet (oder einen separaten Bewegkontakt) trägt.This object is achieved by the features of
Die Bimetallschnappscheibe ist hierbei derart in dem Gehäuse angeordnet, dass der Befestigungspunkt und der Bewegkontakt auf einer gemeinsamen, zur Längserstreckung der Kontaktarme parallelen Achse liegen.The Bimetallschnappscheibe is in this case arranged in the housing, that the attachment point and the moving contact lie on a common, parallel to the longitudinal extent of the contact arms axis.
Es hat sich herausgestellt, dass insbesondere die Kombination der in Längsrichtung ausgerichteten Bimetallschnappscheibe mit dem topfartigen Gehäusedeckel für eine einfache Miniaturisierung des Schutzschalters besonders vorteilhaft ist. So kann durch die Längsstellung der Bimetallschnappscheibe der für diese zur Verfügung stehende Bauraum besonders gut ausgenutzt werden. Insbesondere kann eine für ein betriebssicheres Schaltverhalten hinreichend lange Bimetallschnappscheibe aufgrund der Längsstellung der Bimetallschnappscheibe auf besonders geringem Bauraum angeordnet werden. Der Einsatz eines topfartigen Gehäusedeckels ermöglicht hierbei eine besonders gute Zugänglichkeit der elektrischen Komponenten, insbesondere der Bimetallschnappscheibe, die die Montage derselben erheblich vereinfacht.It has been found that in particular the combination of the longitudinally aligned bimetallic snap-action disc with the pot-like housing cover is particularly advantageous for a simple miniaturization of the circuit breaker. So can be used particularly well by the longitudinal position of the Bimetallschnappscheibe available for this space. In particular, a sufficiently long for a reliable switching behavior Bimetallschnappscheibe due to the longitudinal position of the Bimetallschnappscheibe be arranged on a particularly small space. The use of a pot-like Housing cover in this case allows a particularly good accessibility of the electrical components, in particular the Bimetallschnappscheibe that simplifies the installation of the same considerably.
Bei der das Trennelement vorspannenden Feder handelt es sich um eine Wendeldruckfeder. Diese Wendeldruckfeder ist auf einen Führungsdorn aus Metall aufgesetzt, der sich zumindest im Wesentlichen über die gesamte Federlänge erstreckt. Dieser Ausführung liegt die Erkenntnis zugrunde, dass der Einsatz einer Wendeldruckfeder aus Gründen hoher Betriebssicherheit und hoher Montagefreundlichkeit einerseits wünschenswert ist, dass aber solche Wendeldruckfedern andererseits in der erforderlichen Miniaturisierung nicht knicksicher sind und deshalb einer Führung bedürfen. Erkanntermaßen bildet der die Feder durchgreifende metallische Führungsdorn eine äußerst platzsparende, dennoch aber effektive Möglichkeit zur Führung der Wendeldruckfeder. In einer herstellungstechnisch besonders einfachen Ausführung ist der Führungsdorn einstückig mit einem der Kontaktarme, insbesondere dem Festkontaktarm, ausgebildet.The separator biasing spring is a helical compression spring. This helical compression spring is mounted on a guide pin made of metal, which extends at least substantially over the entire spring length. This embodiment is based on the finding that the use of a helical compression spring for reasons of high reliability and high ease of assembly is desirable on the one hand, but that such helical compression springs on the other hand in the required miniaturization are not kinking and therefore require guidance. As is known, the spring-penetrating metallic guide pin forms an extremely space-saving, yet effective way of guiding the helical compression spring. In a manufacturing technology particularly simple embodiment of the guide pin is integrally formed with one of the contact arms, in particular the Festkontaktarm.
Bevorzugt ragt der Führungsdorn durch die Feder hindurch in eine Führungsbohrung des Trennelements, insbesondere des Druckknopfes, hinein, wobei insbesondere der Querschnitt der Führungsbohrung etwa an den Querschnitt des Führungsdorns angepasst ist. Der Führungsdorn dient somit vorteilhafterweise auch zur direkten Führung des Trennelements. Das Trennelement ist zusätzlich oder alternativ hierzu, insbesondere im Bereich der Trennplatte, zweckmäßigerweise (auch) an einem Führungsgrat des anderen Kontaktarms, insbesondere also des Bimetallkontaktarms, geführt. Hierzu weist das Trennelement vorteilhafterweise eine gabelartige Führungskontur auf, die den Führungsgrat formschlüssig umgreift. Das "Auffädeln" der Führungskontur auf dem Führungsgrat wird dabei zweckmäßigerweise dadurch vereinfacht, dass die Führungskontur zwei in Längsrichtung zueinander versetzte Führungszinken aufweist. Diese Ausführung vereinfacht auch die Herstellung des Trennelements im Spritzgussverfahren. Der Führungsgrat kann alternativ auch am Sockel ausgebildet sein.Preferably, the guide pin protrudes through the spring into a guide bore of the separating element, in particular the push button, into it, wherein in particular the cross section of the guide bore is approximately adapted to the cross section of the guide pin. The guide pin thus advantageously also serves for direct guidance of the separating element. The separating element is additionally or alternatively, in particular in the region of the separating plate, expediently (also) on a Führungsgrat the other contact arm, in particular so the Bimetallkontaktarms out. For this purpose, the separating element advantageously has a fork-like guide contour, which engages around the guide ridge in a form-fitting manner. The "threading" the guide contour on the Führungsgrat is thereby expediently simplified in that the guide contour has two longitudinally offset guide tines. This embodiment also simplifies the production of the separating element by injection molding. The Führungsgrat may alternatively be formed on the base.
In einer besonders vorteilhaften Variante des Schutzschalters sind der Druckknopf und die Trennplatte nicht einstückig, sondern als separate, gegeneinander verschiebbar geführte Bauteile ausgebildet. Der Druckknopf weist hierbei einen Mitnehmer auf, der derart geführt ist, dass er beim Eindrücken des Druckknopfes aus seiner ausgefahrenen Stellung in seine eingedrückte Stellung die Trennplatte in die Freigabestellung bewegt, dass aber bei Erreichen der eingedrückten Stellung des Druckknopfes der Mitnehmer von der Trennplatte entkoppelt wird. Durch die Entkopplung des Mitnehmers von der Trennplatte wird eine so genannte Freiauslösung der Trennplatte erreicht. Infolge der Freiauslösung kann die trennende Funktion der Trennplatte nicht dadurch wirkungslos gemacht werden, dass der Druckknopf dauerhaft in seinem eingedrückten Zustand gehalten wird. Eine Fehlfunktion des Schutzschalters durch missbräuchlich oder versehentlich niedergedrückten Druckknopf ist daher ausgeschlossen.In a particularly advantageous variant of the circuit breaker, the push button and the partition plate are not integral, but designed as separate, mutually displaced guided components. The push button in this case has a driver, which is guided so that it moves the separating plate in the release position upon depression of the push button from its extended position to its depressed position, but that when the depressed position of the push button, the driver is decoupled from the separator plate , By decoupling the driver from the partition plate, a so-called free release of the partition plate is achieved. As a result of the free release, the separating function of the partition plate can not be rendered ineffective by the fact that the push button is kept permanently in its depressed state. A malfunction of the circuit breaker by abusive or accidentally depressed push button is therefore excluded.
Um auf einfache und vergleichsweise gut miniaturisierbare Weise die abwechselnde Kopplung und Entkopplung des Mitnehmers mit der Trennplatte beim Drücken und Loslassen des Druckknopfes zu erzielen, ist der Mitnehmer vorzugsweise auf einer geschlossenen Kreisbahn geführt, so dass er beim Eindrücken des Druckknopfes einen anderen Weg nimmt als beim Rückspringen des Druckknopfes in die ausgefahrene Stellung. Der Mitnehmer ist insbesondere an einem Führungsgrat geführt, der einstückig mit einem der Kontaktarme, insbesondere dem Bimetallkontaktarm ausgebildet ist. Zur Führung des Mitnehmers auf einer geschlossenen Kreisbahn wird der Mitnehmer vorzugsweise ringförmig um diesen Führungsgrat herumgeführt.In order to achieve the coupling and decoupling of the driver with the separating plate when pressing and releasing the push button in a simple and comparatively well miniaturized way, the driver is preferably guided on a closed circular path, so that he takes a different path when pressing the push button than when Jump back the push button in the extended position. The driver is guided in particular on a guide ridge, which is formed integrally with one of the contact arms, in particular the Bimetallkontaktarm. To guide the driver on a closed circular path, the driver is preferably guided around this ring guide annularly.
Um auf einfachem Wege eine Kreisführung des Mitnehmers zu erreichen, ist dieser zweckmäßigerweise mit zwei bezüglich der Verschieberichtung des Druckknopfes schräg angestellten, insbesondere etwa zueinander parallelen Abgleitflächen versehen. Diese Abgleitflächen sind derart bezüglich des oben genannten Führungsgrates angeordnet, dass der Mitnehmer beim Eindrücken des Druckknopfes und beim Ausfahren des Druckknopfes jeweils auf eine andere Flachseite des Kontaktarms ausgelenkt wird.In order to achieve a circuit guide of the driver in a simple way, this is expediently provided with two with respect to the displacement direction of the push button obliquely hired, in particular approximately parallel sliding surfaces. These sliding surfaces are arranged with respect to the above-mentioned Führungsgrates that the driver is deflected when pressing the push button and when extending the push button on each other flat side of the contact arm.
Der Mitnehmer ist vorzugsweise elastisch auslenkbar mit dem Druckknopf verbunden. Insbesondere ist der Mitnehmer integral über einen einstückig an den Druckknopf angeformten Federarm mit diesem verbunden. Beim Eindrücken des Druckknopfes aus seiner ausgefahrenen Stellung in seine eingedrückte Stellung ist der Mitnehmer vorzugsweise derart geführt, dass er sich in einem elastisch ausgelenkten Zustand befindet. Zur einfachen und schnellen Entkopplung des Mitnehmers von der Trennplatte ist hierbei der Kontaktarm mit einem Einschnitt versehen, durch den der Mitnehmer in eine Ruhelage zurückspringt, wenn der Druckknopf seine eingedrückte Stellung erreicht hat, so dass der Mitnehmer schnell und sicher von der Trennplatte entkoppelt wird.The driver is preferably connected elastically deflectable with the push button. In particular, the driver is integrally connected via an integrally formed on the push button spring arm with this. When pressing the push button from its extended position to its depressed position, the driver is preferably guided so that it is in an elastically deflected state. For easy and quick decoupling of the driver of the partition plate here, the contact arm is provided with an incision through which the driver jumps back to a rest position when the push button has reached its depressed position, so that the driver is quickly and safely decoupled from the partition plate.
Der Druckknopf weist vorteilhafterweise zusätzlich einen zweiten Mitnehmer auf. Dieser zweite Mitnehmer ist derart angeordnet, dass er in Ausfahrrichtung des Druckknopfes an der Trennplatte anschlägt, so dass der Druckknopf durch die Trennplatte in der eingedrückten Stellung gehalten wird, solange sich die Trennplatte in der Freigabestellung befindet.The push button advantageously additionally has a second driver. This second driver is arranged such that it abuts in the extension of the push button on the partition plate, so that the push button is held by the partition plate in the depressed position, as long as the partition plate is in the release position.
In zweckmäßiger Ausgestaltung sind bei separater Ausführung der Trennplatte und des Druckknopfes beide Teile gesondert durch jeweils eine separate Wendeldruckfeder in Richtung auf die Trennstellung der Trennplatte bzw. auf die ausgefahrene Stellung des Druckknopfes vorgespannt. Jede dieser beiden Wendeldruckfedern ist hierbei im Sinne einer einfach miniaturisierbaren und effektiven Führung auf einem separaten Führungsdorn eines der Kontaktarme aufgesetzt. Vorzugsweise sind beide Wendeldruckfedern dabei an demselben Kontaktarm, insbesondere dem Festkontaktarm, geführt.In an advantageous embodiment, both parts are separately biased by a separate helical compression spring in the direction of the separation position of the partition plate or on the extended position of the push button in a separate embodiment of the partition plate and the push button. Each of these two helical compression springs is hereby placed in the sense of an easily miniaturizable and effective guidance on a separate guide pin of one of the contact arms. Preferably, both helical compression springs are guided on the same contact arm, in particular the fixed contact arm.
Nachfolgend werden Ausführungsbeispiele der Erfindung anhand einer Zeichnung näher erläutert. Darin zeigen:
- Fig. 1
- in einer Explosionsdarstellung eine erste Variante eines Schutzschalters mit einem aus einem Gehäusesockel und einem Gehäusedeckel gebildeten Gehäuse, zwei in den Gehäusesockel teilweise eingebetteten Kontaktarmen und einer Bimetallschnappscheibe,
- Fig. 2
- in perspektivischer Darstellung den Schutzschalter gemäß
Fig. 1 in montiertem Zustand mit geschlossenem Gehäuse, - Fig. 3
- in Frontansicht die in den Gehäusesockel eingebetteten Kontaktarme des Schutzschalters gemäß
Fig. 1 , - Fig. 4
- in perspektivischer Darstellung den Schutzschalter gemäß
Fig. 1 in dem Teilmontagezustand gemäßFig. 3 , - Fig. 5
- in Darstellung gemäß
Fig. 3 den Schutzschalter gemäßFig. 1 im Montagezustand, jedoch ohne Gehäusedeckel, - Fig. 6
- in Darstellung gemäß
Fig. 4 den Schutzschalter gemäßFig. 1 im Montagezustand ohne Gehäusedeckel, - Fig. 7
- in Seitenansicht den Schutzschalter gemäß
Fig. 1 im Montagezustand ohne Gehäusedeckel in einem (elektrisch leitenden) Normalzustand, - Fig. 8
- in Darstellung gemäß
Fig. 7 den Schutzschalter gemäßFig. 1 in ausgelöstem Zustand, - Fig. 9
- in Darstellung gemäß
Fig. 1 eine zweite Variante des Schutzschalters, die gegenüber der ersten Variante zusätzlich ein Trennelement und eine Wendeldruckfeder umfasst, - Fig. 10
- in Darstellung gemäß
Fig. 2 den Schutzschalter gemäßFig. 9 , - Fig. 11
- etwa in Darstellung gemäß
Fig. 4 die in den Gehäusesockel eingebetteten Kontaktarme des Schutzschalters gemäßFig. 9 mit aufgeschobener Wendeldruckfeder, - Fig. 12
- in Darstellung gemäß
Fig. 11 den Schutzschalter gemäßFig. 9 mit zusätzlich montiertem Trennelement, - Fig. 13
- in Frontansicht den Schutzschalter gemäß
Fig. 9 im Montagezustand ohne Gehäuse, - Fig. 14
- in Draufsicht von oben den Schutzschalter gemäß
Fig. 9 im Montagezustand ohne Gehäuse, - Fig. 15
- in Seitenansicht den Schutzschalter gemäß
Fig. 9 im Montagezustand ohne Gehäuse in seinem Normalzustand, - Fig. 16
- in Darstellung gemäß
Fig. 1 eine dritte Variante des Schutzschalters, die ein zweigeteiltes Trennelement sowie gegenüber der zweiten Variante eine zusätzliche Wendeldruckfeder umfasst, - Fig. 17
- in Darstellung gemäß
Fig. 2 den Schutzschalter gemäßFig. 16 , - Fig. 18
- in Darstellung gemäß
Fig. 11 den Schutzschalter gemäßFig. 16 , - Fig. 19
- in Darstellung gemäß
Fig. 12 den Schutzschalter gemäßFig. 16 , - Fig. 20
- in Darstellung gemäß
Fig. 13 den Schutzschalter gemäßFig. 16 , - Fig. 21
bis 24 - in jeweils ausschnitthafter Seitenansicht den Schutzschalter gemäß
Fig. 16 im Montagezustand ohne Gehäusedeckel in verschiedenen Stellungen des Trennelements beim Rückstellen des Schutzschalters.
- Fig. 1
- in an exploded view, a first variant of a circuit breaker with a housing formed from a housing base and a housing cover, two in the Housing base partially embedded contact arms and a Bimetallschnappscheibe,
- Fig. 2
- in perspective view of the circuit breaker according to
Fig. 1 in assembled condition with closed housing, - Fig. 3
- in front view embedded in the housing base contact arms of the circuit breaker according to
Fig. 1 . - Fig. 4
- in perspective view of the circuit breaker according to
Fig. 1 in the partial assembly state according toFig. 3 . - Fig. 5
- in illustration according to
Fig. 3 the circuit breaker according toFig. 1 in the assembled state, but without housing cover, - Fig. 6
- in illustration according to
Fig. 4 the circuit breaker according toFig. 1 in the assembled state without housing cover, - Fig. 7
- in side view the circuit breaker according to
Fig. 1 in the assembled state without housing cover in a (electrically conductive) normal state, - Fig. 8
- in illustration according to
Fig. 7 the circuit breaker according toFig. 1 in a triggered state, - Fig. 9
- in illustration according to
Fig. 1 a second variant of the circuit breaker, which in addition to the first variant comprises a separating element and a helical compression spring, - Fig. 10
- in illustration according to
Fig. 2 the circuit breaker according toFig. 9 . - Fig. 11
- in representation according to
Fig. 4 the embedded in the housing base contact arms of the circuit breaker according toFig. 9 with deferred helical compression spring, - Fig. 12
- in illustration according to
Fig. 11 the circuit breaker according toFig. 9 with additionally mounted separating element, - Fig. 13
- in front view the circuit breaker according to
Fig. 9 in the assembled state without housing, - Fig. 14
- in plan view from above the circuit breaker according to
Fig. 9 in the assembled state without housing, - Fig. 15
- in side view the circuit breaker according to
Fig. 9 in the assembled state without housing in its normal state, - Fig. 16
- in illustration according to
Fig. 1 a third variant of the circuit breaker, which comprises a two-part separating element and compared to the second variant an additional helical compression spring, - Fig. 17
- in illustration according to
Fig. 2 the circuit breaker according toFig. 16 . - Fig. 18
- in illustration according to
Fig. 11 the circuit breaker according toFig. 16 . - Fig. 19
- in illustration according to
Fig. 12 the circuit breaker according toFig. 16 . - Fig. 20
- in illustration according to
Fig. 13 the circuit breaker according toFig. 16 . - Fig. 21 to 24
- in each case a partial side view of the circuit breaker according to
Fig. 16 in the assembled state without housing cover in different positions of the separating element when resetting the circuit breaker.
Einander entsprechende Teile sind in allen Figuren stets mit gleichen Bezugszeichen versehen.Corresponding parts are always provided with the same reference numerals in all figures.
Eine erste Variante des Schutzschalters ist zunächst in den
Der Gehäusesockel 3 und der Gehäusedeckel 4 sind aus elektrischem Isoliermaterial, nämlich einem thermoplastischen Kunststoff, gefertigt. Der einstückige Gehäusedeckel 4 ist topfartig ausgebildet und umschließt somit mit fünf geschlossenen Wänden ein Volumen, das einen Innenraum 12 (durch einen gestrichelten Bezugspfeil angedeutet) des Schutzschalters 1 definiert. Der Gehäusedeckel 4 kann mit seiner offenen Seite auf den Gehäusesockel 3 aufgeschnappt werden.
Die Kontaktarme 5 und 6 sind Biege-Stanz-Teile aus Metallblech, insbesondere verzinntes Messing, mit flachem, rechteckigem Querschnitt. In den Gehäusesockel 3 sind der Festkontaktarm 5 und der Bimetallkontaktarm 6 formschlüssig eingebettet, indem bei der Herstellung des Schutzschalters 1 die Kontaktarme 5 und 6 mit dem Material des Gehäuesockels 3 umspritzt werden. Die Kontaktarme 5 und 6 ragen hierbei an einer Unterseite 13 des Gehäusesockels 3 mit je einem Steckkontakt 14 aus dem Gehäusesockel 3 nach außen heraus. Das Gehäuse 2, insbesondere der Gehäusedeckel 4, haben etwa die Form eines Flachquaders mit einer (Gehäuse-)Schmalseite 15 und einer (Gehäuse-)Breitseite 16. Die Kontaktarme 5 und 6 sind dabei derart in den Gehäusesockel 3 eingebettet, dass die Steckkontakte 14 parallel zueinander und bezüglich der Gehäuseschmalseite 15 etwa mittig und mit Abstand zueinander angeordnet sind.The
Der Schutzschalter 1 ist hinsichtlich seiner äußeren geometrischen Abmessungen an die Norm ISO 8820 type F (miniature) angelehnt, entspricht also von außen einer Flachstecksicherung des Typs F gemäß dieser Norm, so dass der Schutzschalter 1 mit einer Steckbuchse für eine solche Flachstecksicherung kompatibel ist, d.h. in eine solche Steckbuchse einsteckbar ist.The
Im Blick auf die Gehäusebreitseite 16 sind die Steckkontakte 14 der Kontaktarme 5 und 6 jeweils randseitig angeordnet. Im Gehäuseinnenraum 12 sind beide Kontaktarme 5 und 6 jeweils nach innen zur Gehäusemitte geführt, so dass ein inneres Ende 17 des Festkontaktarms 5 über einem inneren Ende 18 des Bimetallkontaktarms 6 angeordnet ist. Als "oben" ist hierbei - unabhängig von der tatsächlichen Orientierung des Schutzschalters 1 im Raum - die von dem Gehäusesockel 3 und den Steckkontakten 14 abgewandte Seite des Schutzschalters 1 bezeichnet.In view of the
Die inneren Enden 17 und 18 der der Kontaktarme 5 und 6 sind - wie insbesondere aus
Wie insbesondere aus der perspektivischen Schrägansicht gemäß
Die Längserstreckung der Kontaktarme 5 und 6, und insbesondere der Steckkontakte 14 dieser Kontaktarme 5 und 6, definiert eine Längsrichtung 21. Die innerhalb der Mittelebene 20 zu der Längsrichtung 21 senkrecht angeordnete Richtung ist nachfolgend als Querrichtung 22 bezeichnet:The longitudinal extent of the
Zur besseren Fixierung der Kontaktarme 5 und 6 weist der Gehäusesockel 3 in Querrichtung 22 jeweils randseitig, und somit etwa in Verlängerung der Steckkontakte 14, zwei von einer Sockelplatte 23 in den Innenraum 12 hineinstehende Arme 24 und 25 auf, wobei der Festkontaktarm 5 in den Arm 24 und der Bimetallkontaktarm 6 in den Arm 25 eingebettet sind. Die Arme 24 und 25 lassen - wiederum in Querrichtung 22 gesehen - zwischen sich einen Freiraum 26, in den die inneren Enden 17 und 18 der Kontaktarme 5 und 6 hineinstehen. Mit anderen Worten stehen beide Enden 17 und 18 der Kontaktarme 5 bzw. 6 von dem Sockel 3 frei in den Innenraum 12 ab. In diesem Bereich, somit mit Abstand zu dem Gehäusesockel 3, ist (wiederum freiendseitig) am inneren Ende 17 des Festkontaktarms 5 der Festkontakt 8 aufgeschweißt. Ebenfalls freiendseitig ist an dem inneren Ende 18 des Kontaktarmes 6 - somit wiederum mit Abstand zu dem Gehäusesockel 3 - die Niete 10 befestigt (siehe insbesondere
Auf der Niete 10 wird die Bimetallschnappscheibe 7 mittels des Schweißplättchens 11 aufgeschweißt (siehe insbesondere
In ihrer Normalstellung ist die Bimetallschnappscheibe 7 gemäß
Die Bimetallschnappscheibe 7 ist weiterhin derart ausgebildet, dass sie sprunghaft ihre Form ändert, wenn ihre Temperatur eine baubedingt vorgegebene Auslösetemperatur von vorzugsweise 1700° C überschreitet. Diese Formänderung erfolgt derart, dass der Bewegkontakt 9 von dem Festkontakt 8 abgehoben, und somit die zwischen dem Festkontaktarm 5 und dem Bimetallkontaktarm 6 bestehende elektrische Verbindung getrennt wird.
Die Formänderung der Bimetallschnappscheibe 7 erfolgt reversibel in Abhängigkeit ihrer Temperatur, so dass die Bimetallschnappscheibe 7 in die Normalstellung gemäß
Bei der Montage des Schutzschalters 1 werden die ausgestanzten, in Form gebogenen und mit dem Festkontakt 8 bzw. der Niete 10 versehenen Kontaktarme 5 und 6 mit dem Gehäusesockel 3 umspritzt und somit in diesen eingebettet. Anschließend wird die mit dem Bewegkontakt 9 versehene Bimetallschnappscheibe 7 an dem Bimetallkontaktarm 6 - genauer an der Niete 10 - angeschweißt. Die Bimetallschnappscheibe 7 wird dabei zunächst derart angeschweißt, dass der Bewegkontakt 9 von dem Festkontakt 8 beabstandet ist oder nur lose auf diesem aufliegt, dass also die Bimetallschnappscheibe 7 zunächst nicht unter einer Vorspannung steht. Die erforderliche Vorspannung der Bimetallschnappscheibe 7 im Normalzustand wird erst in einem nachfolgenden Fertigungsschritt hergestellt, indem das innere Ende 18 des Bimetallkontaktarms 6 um eine in Querrichtung 22 verlaufende und von dem Gehäusesockel 3 hinreichend beabstandete Knickachse 29 (siehe
Die Umbiegung des Endes 18 ermöglicht somit eine Justage des Schutzschalters 1, durch die Fertigungstoleranzen, insbesondere bei der Einbettung der Kontaktarme 5 und 6 in den Gehäusesockel 3 ausgeglichen, und ein einheitliches, präzises Auslöseverhalten des Schutzschalters 1 sichergestellt werden kann.The bend of the
Infolge dieser Justage ist das innere Ende 18 des Bimetallkontaktarms 6 im Montageendzustand geringfügig schräg bezüglich der Mittelebene 20 des Schutzschalters 1 angeordnet (wie aus den
In einem abschließenden Montageschritt wird der Gehäusedeckel 4 auf den Gehäusesockel 3 aufgeschnappt.In a final assembly step, the housing cover 4 is snapped onto the housing base 3.
In der einfachen Variante gemäß der
Eine zweite Variante des Schutzschalters 1 ist anhand der
Das Trennelement 36 ist als einstückiges Kunststoff-Spritzgussteil ausgebildet und umfasst im Wesentlichen eine Trennplatte 38 und einen Druckknopf 39.The separating
Der Gehäusedeckel 4 entspricht im Wesentlichen dem Gehäusedeckel 4 der vorstehend beschriebenen Varianten des Schutzschalters 1, hat aber abweichend hiervon in seiner oberen Fläche eine Aussparung 40, durch die der Druckknopf 39 des Trennelements 36 im Einbauzustand aus dem Gehäuse 2 ragt. Die
Im Montagezustand sind die Wendeldruckfeder 37 und der Druckknopf 39 an dem Festkontaktarm 5 geführt. Der Festkontaktarm 5 weist hierzu zwei dünne, langgestreckte Führungsdorne 41 und 42 auf. Die Wendeldruckfeder 37 ist hierbei auf den außen gelegenen Führungsdorn 41 aufgeschoben (siehe insbesondere
In der Einbaustellung des Trennelements 36 steht die Trennplatte 38 etwa in Querrichtung 22 von dem Druckknopf 39 ab und ist etwa koplanar mit der Mittelebene 20 dem inneren Ende 17 des Festkontaktarms 5 vorgelagert (siehe
Im Einbauzustand ist das Trennelement 36 an den Führungsdornen 41 und 42 sowie an dem Führungsgrat 43 in Längsrichtung 21 verschiebbar zwischen einer Trennstellung und einer Freigabestellung geführt. In der (in den
Das Trennelement 36 ist durch die Wendeldruckfeder 37 nach oben, d.h. in Richtung auf die Trennstellung vorgespannt. Unter dem Federdruck nimmt das Trennelement 36 die Trennstellung automatisch dann ein, wenn beim Auslösen des Schutzschalters 1 der Bewegkontakt 9 von dem Festkontakt 8 abgehoben wird. Die Trennplatte 38 schiebt sich somit zwischen den Festkontakt 8 und den Bewegkontakt 9 und verhindert, dass bei Abkühlung der Bimetallschnappscheibe 7 die elektrische Verbindung zwischen dem Festkontakt 8 und dem Bewegkontakt 9 erneut geschlossen wird.The separating
Die Freigabestellung der Trennplatte 38 korrespondiert mit einer Stellung des Druckknopfes 39, in der der Druckknopf 39 bündig mit der Oberkante des Gehäusedeckels 4 abschließt oder nur geringfügig aus dem Gehäuse 2 nach außen hervorsteht. Diese Stellung des Druckknopfes 39 ist als eingedrückte Stellung bezeichnet.The release position of the
Die Trennstellung der Trennplatte 38 korrespondiert dagegen mit einer Stellung des Druckknopfes 39, in der dieser - gegebenenfalls weiter - aus dem Gehäuse 2 hervorsteht als in der eingedrückten Stellung. Diese Stellung des Druckknopfes 39 ist nachfolgend als "ausgefahrene Stellung" bezeichnet.The separating position of the
Durch manuelle Druckausübung auf den Druckknopf 39 kann dieser gegen den Federdruck der Wendeldruckfeder 37 aus seiner ausgefahrenen Stellung in die eingedrückte Stellung zurückverschoben werden, wodurch die Trennplatte 38 wieder in die Freigabestellung zurückverschoben wird und die Bimetallschnappscheibe 7 den Bewegkontakt 9, sofern die Temperatur der Bimetallschnappscheibe 7 die Rücksprungtemperatur unterschreitet, wieder auf dem Festkontakt 8 zur Anlage bringt. In der somit wieder hergestellten Normalstellung des Schutzschalters 1 schlägt die Trennplatte 38 unter dem Federdruck der Wendeldruckfeder 37 von unten an den Bewegkontakt 9 an (siehe
Der Verschiebeweg des Druckknopfes 39 wird nach unten hin begrenzt durch einen Anschlag 48, der an den Arm 24 des Gehäusesockels 3 angeformt ist. Der Anschlag 48 flankiert die Wendeldruckfeder 37 und ist hinreichend lang dimensioniert, um eine Quetschung der Wendeldruckfeder 37 auszuschließen. Nach oben hin wird der Verschiebeweg des Druckknopfes 39 begrenzt durch Anschläge 49, die am unteren Ende des Druckknopfes 39 angeformt sind, und mit denen der Druckknopf 39 in ausgefahrener Stellung an dem Gehäusedeckel 4 anschlägt.The displacement of the
Eine weiter verbesserte Variante der vorstehend beschriebenen Ausführungsform des Schutzschalters 1 ist in den
Zur Vorspannung der Trennplatte 38 umfasst der Schutzschalter 1 in der Ausführung gemäß der
Der Druckknopf 39 umfasst eine integral angeformte Querstrebe 52, die im Montagezustand (siehe
Zur mechanischen Stabilisierung sowie für eine verbesserte Führung ist an die Trennplatte 38 ein Stützbogen 55 angeformt, der die eigentliche Trennplatte 38 überwölbt. An ihrem dem Festkontaktarm 5 zugewandten (in der Darstellung gemäß
In der Ausführungsform gemäß der
An ihrem dem Längsfortsatz 33 zugewandten (in der Darstellung gemäß
Das Zusammenwirken des Mitnehmers 54 mit dem Führungsgrat 43 und dem Mitnehmerarm 58 ist nachfolgend anhand der
Der Mitnehmer 54 hat, wie insbesondere aus den
Beim Eindrücken des Druckknopfes 39 stößt der Mitnehmer 54 zunächst auf die am Freiende 60 gebildete Oberkante des Längsfortsatzes 33. Infolge der Schrägstellung der Fläche 61 und einer entsprechenden Neigung der Oberkante des Längsfortsatzes 33 wird der Mitnehmer 54 unter Ausbiegung des Federarmes 53 zur Rückseite des Längsfortsatzes 33 hin ausgelenkt. Er trifft hier auf das Freiende 59 des Mitnehmerarms 54 und verschiebt diesen bei fortgesetztem Eindrücken des Druckknopfes 39 nach unten (siehe
Mit dem Erreichen der Freigabestellung kommt der Mitnehmer 54 in den Bereich des Einschnitts 50 des Führungsgrats 43. Die obere Kante 63 des in der Darstellung gemäß
Sofern die Bimetallschnappscheibe 7 zu diesem Zeitpunkt bereits unter ihre Rücksprungtemperatur abgekühlt ist, und der Bewegkontakt 9 daher wieder an dem Festkontakt 8 anliegt, schlägt die Trennplatte 38 wie bei dem vorstehend beschriebenen Ausführungsbeispiel an dem Bewegkontakt 9 an, wodurch die Trennplatte 38 in ihrer Freigabestellung arretiert wird (siehe
Befindet sich dagegen die Bimetallschnappscheibe 7 noch in ihrer ausgelösten Stellung, so wird die Trennplatte 38 unter dem Druck der Wendeldruckfeder 51 erneut in ihre Trennstellung verschoben, und zwar auch dann, wenn der Druckknopf 39 weiterhin in seiner eingedrückten Stellung gehalten wird.If, on the other hand, the bimetallic snap-
Beim Loslassen des Druckknopfes 9 wird dieser durch den Federdruck der Wendeldruckfeder 37 nach oben in Richtung auf seine ausgefahrene Stellung verschoben. Der Mitnehmer 54 schlägt hierbei mit seiner oberen Fläche 62 an der oberen Kante 63 an. Infolge der Schrägstellung der Fläche 62, und einer entsprechenden Schrägstellung der Kante 63 wird der Mitnehmer 54 bei fortgesetzter Verschiebung des Druckknopfes 39 unter erneuter Ausbiegung des Federarmes 53 zur Vorderseite des Längsfortsatzes 33 hin ausgelenkt. Der Mitnehmer 54 wird somit an dem Mitnehmerarm 58 vorbei, und mithin entkoppelt von diesem, nach oben verschoben.When you release the
Sofern zu diesem Zeitpunkt die Trennplatte 38 in ihrer Freigabestellung an dem Bewegkontakt 9 arretiert ist, wird der Verschiebeweg des Druckknopfes 39 durch die Trennplatte 38 begrenzt, indem der Druckknopf 39 mit der Oberseite seiner Querstrebe 52 an der Unterkante der Trennplatte 38 anschlägt. Die Querstrebe 52 bildet somit einen weiteren Mitnehmer, der den Druckknopf 39 in seiner eingedrückten Stellung arretiert, solange sich die Trennplatte 39 in ihrer Freigabestellung befindet.If at this time the
Befindet sich die Trennplatte 38 dagegen in ihrer Trennstellung, so wird der Druckknopf 39 unter dem Druck der Wendeldruckfeder 37 nach oben verschoben, bis er seine ausgefahrene Stellung erreicht, und somit die Ausgangsstellung gemäß Fig. 25 wieder erreicht ist. Der in den
Claims (15)
- Miniature circuit breaker (1) having a housing (2), comprising a housing base (3) made of insulating material and a pot-shaped housing cover (4) that can be placed or is placed on the housing base (3), wherein two elongated and flat contact arms (5,6) are partially embedded in the housing base (3) and in parallel to one another with respect to their longitudinal direction (21), wherein a fixed contact (8) is arranged on an inner end (17) of a first of the contact arms (5), wherein a bimetallic snap-action disc (7) having a free end (28) forming or bearing a movement contact (9) is applied to an inner end (18) of the second contact arm (6) in a fixing point (34), and wherein the fixing point (34) and the movement contact (9) lie on an axis (19) that is parallel to the longitudinal direction (21) of the contact arms (5,6), having a separating element (36) for electrically separating the movement contact (9) and the fixed contact (8), said separating element (36) having a separating plate (38) made of insulating material and a push button (39) protruding from the housing cover (4) in the mounted state, wherein the separating element (36) is moveably guided between a separating position, in which the separating plate (38) is inserted between the movement contact (9) and the fixed contact (8), and a release position, in which the separating plate (38) releases a contact of the movement contact (9) and the fixed contact (8), wherein the separating element (36) is pre-tensioned by a spring (37,51) in the direction of the separating position, and wherein the separating element (36) can be returned to the release position by pressing the push button (39), wherein the spring is a coil pressure spring (37,51), and wherein the spring (37,51) is placed on a first guide pin (41,42),
characterised in that
the first guide pin (41,42) extends at least substantially over the entire spring length, and the first guide pin (41,42) consists of metal, wherein the guide pin (41,42) is connected to one of the contact arms (5) in one piece. - Circuit breaker (1) according to claim 1, wherein the guide pin (41, 42) is connected to the first contact arm (5) in one piece.
- Circuit breaker (1) according to claim 1 or 2, wherein the guide pin (41, 42) projects into a guide bore of the separating element (36), in particular the push button (39).
- Circuit breaker (1) according to claim 2 or 3, wherein the separating element (36), in particular the separating plate (38), is guided on a guide ridge (43) of the other contact arm (6).
- Circuit breaker (1) according to claim 4, wherein the separating element (36) engages positively around the guide ridge (43) with a fork-like guide contour (44).
- Circuit breaker (1) according to claim 5, wherein the guiding contour (44) has two guide prongs (45, 46) that are offset relative to each other in the longitudinal direction (21).
- Circuit breaker (1) according to one of claims 1 to 6, wherein the push button (39) and the separating plate (38) are formed as separate components and are moveably guided with respect to each other, wherein the push button (39) has a driver (54) that is guided in such a way that it moves the separating plate (38) from an extended position into a depressed position into the release position when depressing the push button (39), and it is decoupled from the separating plate (38) when reaching the depressed position of the push button (39).
- Circuit breaker (1) according to claim 7, wherein the driver (54) is guided on a closed circular track for coupling and uncoupling with the separating plate (38).
- Circuit breaker (1) according to claim 7 or 8, wherein the driver (54) is guided around a guide ridge (43) formed as one piece with one of the contact arms, in particular the second contact arm (6).
- Circuit breaker (1) according to claim 8 or 9, wherein the driver (54) has two gliding surfaces (61,62) inclined at an angle relative to the moving direction of the push button (39), said gliding surfaces (61, 62) being arranged with respect to the contact arm (6) guiding the driver (54) in such a way that the driver (54) is deflected onto a flat side of the contact arm (6) when depressing the push button (39) and onto the other flat side when extending the push button (39).
- Circuit breaker (1) according to one of claims 7 to 10, wherein the driver (54) is connected to the push button (39) in an elastically deflectable manner.
- Circuit breaker (1) according to claim 11, wherein the driver (54) is connected in one piece to the push button (39) via a spring arm (53).
- Circuit breaker (1) according to claim 11 or 12, wherein the driver (54), when depressing the push button (39), is guided from an extended position into a depressed position in the deflected state on one of the contact arms, in particular on the second contact arm (6), and wherein this contact arm (6) has an incision (50) for uncoupling the driver (54) from the separating plate (38), though which incision (50) the driver (54) springs back into a rest position.
- Circuit breaker (1) according to one of claims 7 to 13, wherein the push button (39) has a second driver (52) which abuts on the separating plate (38) in the extending direction of the push button (39), such that the push button (39) is held in the depressed position for as long as the separating plate (38) is in the release position.
- Circuit breaker (1) according to one of claims 7 to 14, wherein the separating plate (38) and the push button (39) are pre-tensioned specifically by, in each case, a separate coil pressure spring (37, 51) placed in each case on a separate guide pin (41, 42) of one of the contact arms, in particular the first contact arm (5), in the direction of the separating position or the extending position.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL14002033T PL2779196T3 (en) | 2008-09-29 | 2009-08-01 | Miniature circuit breaker |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008049507A DE102008049507A1 (en) | 2008-09-29 | 2008-09-29 | Miniature circuit breaker |
EP09777595.1A EP2332161B1 (en) | 2008-09-29 | 2009-08-01 | Miniature circuit breaker |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
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EP09777595.1A Division EP2332161B1 (en) | 2008-09-29 | 2009-08-01 | Miniature circuit breaker |
EP09777595.1A Division-Into EP2332161B1 (en) | 2008-09-29 | 2009-08-01 | Miniature circuit breaker |
Publications (2)
Publication Number | Publication Date |
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EP2779196A1 EP2779196A1 (en) | 2014-09-17 |
EP2779196B1 true EP2779196B1 (en) | 2018-02-14 |
Family
ID=41168486
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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EP14002033.0A Active EP2779196B1 (en) | 2008-09-29 | 2009-08-01 | Miniature circuit breaker |
EP09777595.1A Active EP2332161B1 (en) | 2008-09-29 | 2009-08-01 | Miniature circuit breaker |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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EP09777595.1A Active EP2332161B1 (en) | 2008-09-29 | 2009-08-01 | Miniature circuit breaker |
Country Status (10)
Country | Link |
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US (1) | US8576042B2 (en) |
EP (2) | EP2779196B1 (en) |
KR (1) | KR101214133B1 (en) |
CN (1) | CN102165554B (en) |
AU (1) | AU2009296611B2 (en) |
CA (1) | CA2738198C (en) |
DE (2) | DE102008049507A1 (en) |
PL (2) | PL2779196T3 (en) |
RU (1) | RU2461906C1 (en) |
WO (1) | WO2010034373A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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PL2619784T3 (en) * | 2010-09-24 | 2015-08-31 | Ellenberger & Poensgen | Miniature safety switch |
WO2017010830A1 (en) * | 2015-07-14 | 2017-01-19 | 주식회사 비티케이 | Overload protection device for compressor motor |
US10796872B1 (en) * | 2019-09-01 | 2020-10-06 | Kuoyuh W.L. Enterprise Co., Ltd. | Vehicle circuit breaker |
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US7355139B1 (en) * | 2007-04-26 | 2008-04-08 | Tsung-Mou Yu | Miniature circuit breaker |
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2008
- 2008-09-29 DE DE102008049507A patent/DE102008049507A1/en not_active Withdrawn
-
2009
- 2009-08-01 AU AU2009296611A patent/AU2009296611B2/en active Active
- 2009-08-01 EP EP14002033.0A patent/EP2779196B1/en active Active
- 2009-08-01 DE DE202009019183.4U patent/DE202009019183U1/en not_active Expired - Lifetime
- 2009-08-01 WO PCT/EP2009/005586 patent/WO2010034373A1/en active Application Filing
- 2009-08-01 EP EP09777595.1A patent/EP2332161B1/en active Active
- 2009-08-01 KR KR1020117009982A patent/KR101214133B1/en active IP Right Grant
- 2009-08-01 CA CA2738198A patent/CA2738198C/en active Active
- 2009-08-01 RU RU2011117155/07A patent/RU2461906C1/en active
- 2009-08-01 CN CN200980137826.XA patent/CN102165554B/en active Active
- 2009-08-01 PL PL14002033T patent/PL2779196T3/en unknown
- 2009-08-01 PL PL09777595T patent/PL2332161T3/en unknown
-
2011
- 2011-03-29 US US13/074,336 patent/US8576042B2/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7355139B1 (en) * | 2007-04-26 | 2008-04-08 | Tsung-Mou Yu | Miniature circuit breaker |
Also Published As
Publication number | Publication date |
---|---|
KR101214133B1 (en) | 2012-12-20 |
RU2461906C1 (en) | 2012-09-20 |
WO2010034373A1 (en) | 2010-04-01 |
US8576042B2 (en) | 2013-11-05 |
CA2738198A1 (en) | 2010-04-01 |
KR20110084894A (en) | 2011-07-26 |
EP2779196A1 (en) | 2014-09-17 |
EP2332161B1 (en) | 2014-07-23 |
AU2009296611B2 (en) | 2014-01-16 |
AU2009296611A1 (en) | 2010-04-01 |
CN102165554B (en) | 2014-01-01 |
CA2738198C (en) | 2015-10-06 |
DE102008049507A1 (en) | 2010-04-01 |
PL2332161T3 (en) | 2015-01-30 |
AU2009296611A2 (en) | 2011-04-28 |
EP2332161A1 (en) | 2011-06-15 |
US20110220475A1 (en) | 2011-09-15 |
PL2779196T3 (en) | 2018-10-31 |
CN102165554A (en) | 2011-08-24 |
DE202009019183U1 (en) | 2017-11-29 |
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