EP0508320B1 - Explosionsgeschüzter elektrischer Schalter - Google Patents

Explosionsgeschüzter elektrischer Schalter Download PDF

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Publication number
EP0508320B1
EP0508320B1 EP92105791A EP92105791A EP0508320B1 EP 0508320 B1 EP0508320 B1 EP 0508320B1 EP 92105791 A EP92105791 A EP 92105791A EP 92105791 A EP92105791 A EP 92105791A EP 0508320 B1 EP0508320 B1 EP 0508320B1
Authority
EP
European Patent Office
Prior art keywords
switching device
housing
switch according
rocker
projection
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
EP92105791A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0508320A3 (enrdf_load_stackoverflow
EP0508320A2 (de
Inventor
Wilmut Görner
Rudolf Dehm
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.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0508320A2 publication Critical patent/EP0508320A2/de
Publication of EP0508320A3 publication Critical patent/EP0508320A3/xx
Application granted granted Critical
Publication of EP0508320B1 publication Critical patent/EP0508320B1/de
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
    • H01H23/00—Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button
    • H01H23/02—Details
    • H01H23/04—Cases; Covers
    • H01H23/06—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
    • 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
    • H01H9/02—Bases, casings, or covers
    • H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
    • H01H9/042—Explosion-proof cases

Definitions

  • the invention relates to an explosion-proof electrical switch according to the preamble of claim 1.
  • Such switches are usually designed as toggle, rotary or pushbutton switches.
  • a circuit breaker formed with a switch toggle inside a housing, which can be actuated from the outside, similarly to a circuit breaker, like a circuit breaker which is guided through the pressure-tightly encapsulated housing in a manner that prevents ignition.
  • a rotary toggle arrangement can also be provided with which the switch inside the housing can be actuated, the switch inside the surrounding housing being a circuit breaker (as just mentioned) or a rotary switch, e.g. B. can be a cam switch.
  • the housing can, as mentioned, be flameproof; it can also be a housing with increased security when the switch inserted into the housing, which is encapsulated in a pressure-resistant manner, from which the supply cables are led out in a manner known per se.
  • Pushbutton switches are usually encapsulated in a pressure-tight manner, with the actuation button being led out of the switching chamber space in a manner that prevents ignition. They can then be installed in a housing with increased security.
  • the object of the invention is to further improve an electrical switch of the type mentioned.
  • the operation of the switch is to be facilitated and the assembly of the switch is to be simplified.
  • switch means the entire arrangement with the switching device located in the interior of the surrounding housing and the other components, whereas “switching device” means the pressure-tightly encapsulated part located in the interior of the housing.
  • rocker switch also called a rocker switch
  • actuating rocker which is accessible on the outside of the surrounding housing
  • the pressure-resistant, encapsulated switching device arranged inside the surrounding housing can be switched.
  • the actuating rocker pivots about an axis running in the plane of the outside or parallel to it, and this pivoting movement is converted into a linear movement of the contact point or a plunger, which acts on the contact point, the direction of movement of the movable contact piece of the contact point extends approximately perpendicular to the axis of rotation of the actuating rocker.
  • this rocking or tilting movement takes place via the intermediate member, which is guided in a suitable manner on the actuating rocker or on an extension formed on the actuating rocker in a suitable manner.
  • the intermediate member and the projection embrace partially according to claim 4 and are guided against rotation. So that the intermediate member can only perform a limited movement relative to the extension so that it does not fall off the extension, the latching means are provided according to claim 3.
  • a number of cams corresponding to the number of contact points are formed on the intermediate member and are connected or engaged with actuating elements for actuating the contact points. If the contact points are formed by double contacts, which are bridged by a contact bridge and the actuating element for the contact bridge is a plunger, then the actuating plunger is moved or released depending on the switching direction by pivoting the intermediate member and the action of the cams on the intermediate member, so that Switching device can serve as a break or make contact.
  • a protrusion is provided on the switchgear housing inside the surrounding housing and on the intermediate link, see claim 6, the projection on the pressure-tightly encapsulated switching device protruding into the movement path of the projection on the intermediate link, so that the rocker switch each is held on both sides of the projection. Due to the displaceability of the intermediate member on the extension, the extension can slide with the intermediate member over the projection on the switching device and because of the compression spring between the extension and the intermediate member, the actuating rocker remains locked on both sides depending on the switching position to the projection on the switching device.
  • each rocker part is provided on each rocker part and, according to claim 7, there is also a correspondingly designed intermediate link on each extension, which are arranged next to one another according to claim 8 such that the cam of each intermediate link comes into engagement with the actuating plunger.
  • each intermediate link also has a projection which interacts with the corresponding strip-like projection on the pressure-tightly encapsulated switching device.
  • rocker is mounted on the cover so that it can be tilted, as is apparent from claims 10 and 11, respectively. If the rocker is divided, then according to claim 12, both rockers can be pivoted relative to one another, wherein they are rotatably mounted by means of a single continuous axis.
  • a cold plate is provided according to claim 13 on the outer surface of the cover, which is used to hold a bellows, which engages around the extension on the actuating rocker.
  • pimples or warts can be formed on the holding plate, on which the axle for the two rocker parts is mounted.
  • the surrounding housing 10 is composed of a lower housing part 11 and an upper housing part 12, a circumferential seal 13 being provided between the contacting edges.
  • a flameproof encapsulated switching device 14 is held on the inside of the housing base and is held in place by means of locking fingers 16 molded onto the housing base 15, the locking lugs 17 of which engage behind locking projections 18 on the switching device 14.
  • the fixed contact pieces 22 are led out to a clamping screw 24 by means of a rail 23; the rails 23, of which only the left rail 23 can be seen, whereas the right rail is not shown due to a different cutting plane, are held by a contact carrier 25, and above the contact carrier 25 the space is practically to the free end of the switching device poured out with casting resin 26.
  • the switchgear housing is composed of two parts, namely a cup-shaped housing part 28 and the contact carrier 25, which at the same time also has bores 29 through which the plungers 27 are guided out so as to prevent ignition breakdown.
  • the lower housing part is coupled to the contact carrier 25 by latching means 30.
  • indentation 31 projecting from the outside inwards, which is formed by walls 32 and an end plate 33.
  • Projections 34 and 35 which serve to support an actuating rocker 36, are formed on opposite walls 32 which run parallel to the longitudinal extent of each contact bridge 21, as is shown in more detail below.
  • the actuating rocker 36 has an extension 37 which has a central pin extension 38 and a tubular extension 39 surrounding the latter.
  • An intermediate member 40 which is shown in perspective in FIG. 4, is fastened to the extension 37.
  • This intermediate member 40 has a projection 41 comprising the extension 38, which extends into the space between the extension 38 and 39, and a shorter extension 42, which surrounds the extension 39.
  • extension 42 or projection 42 there are inward-facing latching noses 43 which engage in corresponding grooves 44 on the outside of the projection 39; these grooves 44 have a boundary wall 45 which cooperate with the lugs 43, the shape that the movement between the extension 37 and the intermediate member 40 is limited.
  • a compression spring 46 which is guided between the outer extension 39 and the projection 41 and always seeks to push the intermediate member away from the actuating rocker 36.
  • a holding plate 47 is fastened to the outer surface of the end plate 33, by means of which the outer edge flange 48 of a bellows 49 consisting of elastic, insulating material is held in place; the other end of the bellows 49, reference numeral 50, engages around the extension 37 and thus seals the interior of the surrounding housing from the environment.
  • FIG. 3 shows a sectional view along section line III-III.
  • the projection 34 can be seen, which comprises a cylinder 51 which is supported on a web 52, the cylinder axis running perpendicular to the wall 32.
  • a U-shaped recess or recess 54 is provided on the opposite side walls, of which only the side wall 53 can be seen, which encloses a semicircle of slightly more than 180 ° and whose diameter is adapted to the outside diameter of the cylinder 51 such that the arms 55 and 56 formed by the recess 54 encompass the cylinder 51; the spring action of the arms 55 and 56 causes the locking and locking of the actuating rocker 36.
  • 53 are also on the side wall corresponding recesses are provided on the opposite side wall, so that there the bearing point 35 can be encompassed.
  • the axis of rotation thus formed runs in the plane spanned by the actuating plunger 27.
  • FIG. 4 shows the intermediate member 40.
  • two cams 58 and 59 (the latter in the other corner) are provided on opposite side edges in the area of a corner; A projection 60 is arranged approximately in the center.
  • the cams 58 and 59 interact with the two plungers so that both plungers 27 are actuated simultaneously. If the cam 58 is formed as a cam 58a in the dashed position on the intermediate member, then one actuating plunger is actuated via the cam 59 in one rocker position and the other actuating plunger 27 is actuated via the cam 58a in the other position of the actuating rocker 36.
  • FIG. 5 now shows the free area of the contact carrier 25 with the openings or openings 29 in which the plungers 27 are guided.
  • a roof-shaped projection 61 extends in the area between the two plungers.
  • This roof-shaped projection 61, the roof ridge 62 of which lies in the connecting plane between the two axes of the plunger 27, interacts with the projection 60 in such a way that when the actuating rocker 36 is pivoted, the projection 60 remains on one side and on the other on the other side of the projection 61.
  • the cams 58, 58a and 59 interact in a corresponding manner described above with the tappets 27.
  • the displaceability of the intermediate member 40 on the extension 37 is such that when the intermediate member 40 comes to a stop against the extension 37, when the extension 37 and intermediate member 40 are non-positively against one another, the cams 58, 58a and 59 can actuate the plunger . Seen in the pivoting direction between the cams 58, 58a and 59, such a distance is to be provided that the projection 61 can be overcome in the area in which the spring action of the compression spring 46 is still present, i.e. the that is, the intermediate member does not yet come to rest directly on the extension 38. This is the only way to lock it.
  • FIG. 2 shows a switch 80 in which two rocker elements 81 and 82 are provided as the operating rocker, which are supported in the same way as the operating rocker 36.
  • the two partial rockers 81 and 82 are rotatably supported against one another by means of an axis 83 penetrating them; the holding plate 47 has oppositely arranged knobs 84 and 85 on which the axis 83 is supported.
  • each rocker part has an extension 86 which is surrounded by a corresponding extension 87 of an intermediate member 88.
  • the extension 86 is provided with a blind hole-like recess 89; there is a compression spring 90 in the recess; which loads the intermediate member 88 with respect to the extension 86 in the same way as the compression spring 46.
  • Cams 91 and 92 corresponding to the cams 58 and 59 are formed on each intermediate link 88 and 87a and cooperate with the actuating plungers 27 in the same way as the cams 58 and 59.
  • each intermediate member 88, 87a has a protrusion 93 and 94, each of the protrusions similar to the protrusion 60 with a correspondingly formed one Projection 61 cooperates.
  • the inner end of the bellows 49 is fastened between the holding plate 47 and the bottom 33 of the recess, whereas the other end of the bellows surrounds both projections or extensions on the actuating rocker.

Landscapes

  • Switch Cases, Indication, And Locking (AREA)
  • Push-Button Switches (AREA)
  • Tumbler Switches (AREA)
EP92105791A 1991-04-08 1992-04-03 Explosionsgeschüzter elektrischer Schalter Expired - Lifetime EP0508320B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4111252A DE4111252C2 (de) 1991-04-08 1991-04-08 Explosionsgeschützter elektrischer Schalter
DE4111252 1991-04-08

Publications (3)

Publication Number Publication Date
EP0508320A2 EP0508320A2 (de) 1992-10-14
EP0508320A3 EP0508320A3 (enrdf_load_stackoverflow) 1994-04-13
EP0508320B1 true EP0508320B1 (de) 1995-10-04

Family

ID=6429022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92105791A Expired - Lifetime EP0508320B1 (de) 1991-04-08 1992-04-03 Explosionsgeschüzter elektrischer Schalter

Country Status (2)

Country Link
EP (1) EP0508320B1 (enrdf_load_stackoverflow)
DE (2) DE4111252C2 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19646474B4 (de) * 1996-11-11 2007-09-06 Marquardt Gmbh Elektrischer Schalter
CN101271789B (zh) * 2008-05-06 2010-10-13 创正防爆电器有限公司 带信号灯的按钮开关
CN103956281A (zh) * 2014-04-25 2014-07-30 安徽博泰氟材料科技有限公司 一种新型的防爆开关

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633510A (en) * 1951-09-13 1953-03-31 Hetherington Inc Electric switch
DE6610684U (de) * 1966-09-23 1975-07-03 Siemens Ag Gekapselter abgedichteter installationsschalter.
DE1984169U (de) * 1968-01-15 1968-04-25 Erich Koerber Lichtschalter.
US3681556A (en) * 1971-10-26 1972-08-01 Mc Gill Mfg Co Snap-on rocker cap for electric switch
GB1603820A (en) * 1977-11-09 1981-12-02 Hoover Ltd Electric switches
ES244237Y (es) * 1979-06-28 1980-04-16 Interruptor multiple selectivo.
DE3309593A1 (de) * 1983-03-17 1984-09-20 Brown, Boveri & Cie Ag, 6800 Mannheim Elektrischer schalter oder taster mit zwei grossflaechigen betaetigungswippen
DE3523328A1 (de) * 1985-06-29 1987-01-08 Bbc Brown Boveri & Cie Explosionsgeschuetztes gehaeuse
DE3644141C2 (de) * 1986-12-23 1996-02-01 Asea Brown Boveri Explosionsgeschütztes elektrisches Schaltgerät
SU1552247A2 (ru) * 1988-02-09 1990-03-23 Специальное Конструкторское Бюро Харьковского Электроаппаратного Завода Клавишный выключатель

Also Published As

Publication number Publication date
DE59203869D1 (de) 1995-11-09
DE4111252A1 (de) 1992-10-22
DE4111252C2 (de) 1995-01-05
EP0508320A3 (enrdf_load_stackoverflow) 1994-04-13
EP0508320A2 (de) 1992-10-14

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