EP0058409A2 - Dispositif de commutation électrique actionné par pression - Google Patents

Dispositif de commutation électrique actionné par pression Download PDF

Info

Publication number
EP0058409A2
EP0058409A2 EP82101035A EP82101035A EP0058409A2 EP 0058409 A2 EP0058409 A2 EP 0058409A2 EP 82101035 A EP82101035 A EP 82101035A EP 82101035 A EP82101035 A EP 82101035A EP 0058409 A2 EP0058409 A2 EP 0058409A2
Authority
EP
European Patent Office
Prior art keywords
housing
leaf spring
snap switch
switch
spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82101035A
Other languages
German (de)
English (en)
Other versions
EP0058409B1 (fr
EP0058409A3 (en
Inventor
Jacques Cutaya
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.)
BorgWarner Transmission Systems Monaco SAM
Original Assignee
Eaton SAM
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eaton SAM filed Critical Eaton SAM
Publication of EP0058409A2 publication Critical patent/EP0058409A2/fr
Publication of EP0058409A3 publication Critical patent/EP0058409A3/de
Application granted granted Critical
Publication of EP0058409B1 publication Critical patent/EP0058409B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/34—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by diaphragm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • H01H35/2657—Details with different switches operated at substantially different pressures

Definitions

  • the invention relates to a pressure-actuated electrical switching device with a housing, on which a cover is placed with the interposition of a diaphragm which can thereby be clamped and pressurized, and in which at least one snap-action switch is arranged, the movable switch contact carrier of which is essentially parallel to the diaphragm and in the housing attached leaf spring is formed, which is actuated by a pressure piece from the membrane in the sense of a perpendicular to the membrane switching, movement, and with two, fixed in the housing, fixed contacts for each snap switch, at least one of the fixed contacts adjustable is and for adjusting the switching point of each snap switch between each leaf spring and the housing, an additional spring is supported at one end on a screw screwed into the housing.
  • Such a switching device which is actuated by a pressurized membrane, is known, such as is used, for example, to control the water level in washing machines.
  • the Known switching device contains two snap switches arranged side by side, the movable contact carrier of which is designed as a leaf spring. A pressure piece engages on the leaf springs of both snap switches, into which an extension of a plate attached to the diaphragm of the pressure-actuated switching device engages.
  • the spring hardness and thus the switching point of each snap switch can be adjusted by an additional spring acting in the direction of the switching movement of the snap switch.
  • the pressure piece When the diaphragm is pressurized, the pressure piece is moved so that the snap switches switch one after the other depending on the amount of the movement.
  • the pressure-actuated electrical switching device is characterized in that in the actuating direction of the leaf spring of at least one snap switch between its leaf spring and the housing, a safety snap switch which can be actuated by the leaf spring and has two stop faces, of which at least one of the stop faces is designed as a contact.
  • the safety snap switch is constructed from two leaf springs which run essentially parallel to one another and are each clamped at one end, one of which is bent approximately in the shape of a hook at its free end, while between the hook-shaped end of a leaf spring and the free one At the end of the other leaf spring of the safety snap switch there is an omega spring.
  • the leaf springs of the safety snap switch are fastened with their clamped ends in a metal strip which is firmly seated in the housing and is designed as a plug outside the housing.
  • the switching point or the hysteresis of the safety snap switch can be determined independently of manufacturing tolerances, it is expedient if one of the stops of the safety snap switch is designed to be adjustable.
  • a rivet can be made electrically from the leaf spring of the assigned snap switch non-conductive material that actuates the safety snap switch.
  • the external electrical circuit is simpler if one of the fixed contacts of the safety snap switch is electrically connected to the leaf spring of the associated snap switch located above it.
  • pressure-actuated electrical switching apparatus 1 includes a substantially cylindrical housing 2 with a housing base 4, on which a corresponding lid '6 is mounted, which is retained on the housing 2 by means of a flanged ring 8. Between the cover 6 and the housing 2, a soft membrane 10 is clamped on the edge, on the underside of which a plate 12 is fastened, which carries a central extension 14 pointing downward.
  • the extension 14 is in a round recess 16 of an approximately triangular pressure piece 18, which transmits the actuating force of the membrane 10 to the snap switches 20, 20b and 20c arranged on the bottom 4 of the housing 2.
  • 18 are cylindrical at each corner of the triangular pressure piece molded-on extensions 22, which have a recess 22 at their lower end, the purpose of which is described below. Furthermore, a small bracket with a triangular tip 26 is formed on the lower end of the cylindrical extension 22, which rests on the respective snap switch 20, 20b, 20c.
  • the snap switches 20, 20b, 20c of the switching device 1 are identical to one another, so that it is sufficient if the snap switch 20 is described in detail below. In order to maintain clarity, only the snap switch 20 is shown in FIG. 2 and the snap switches 20b and 20c are omitted.
  • the snap switch 20 contains a relatively narrow and flat L-shaped angled metal strip 28, the long leg of which is seated in the base 4 and forms a plug outside the housing 2.
  • a leaf spring 34 which serves as a carrier for the movable contact 32 of the snap switch 20, is fastened to the short leg 30 of the sheet metal strip 28 inside the housing 2 by riveting or spot welding.
  • the metallic leaf spring 34 has the approximately rectangular shape shown in FIG. 1 with a centrally arranged, also approximately rectangular recess 36 and carries the movable contact 32 at its front free end. Through the recess 36 q , a spring tongue 38 can swing, which is more integral Is part of the leaf spring 34 and protrudes from the narrow side of the rectangular recess 36, which is adjacent to the attachment point of the leaf spring 34.
  • the spring tongue 38 is shorter than the longitudinal dimension of the recess 36 and carries at its free end a small extension 40 which has a corresponding extension 42 on the adjacent narrow side the rectangular recess 36 is opposite.
  • the two extensions 40 and 42 serve to hold a barrel-shaped coil spring 44, which is supported at one end on the narrow side of the recess 36 and at the other end on the free end of the spring tongue 38, so that, depending on the position of the movable contact 32, the spring tongue 38 either upwards or protrudes downward from the recess 36 of the leaf spring 34.
  • two fixed contacts 50 and 52 which are spaced from one another, are arranged on associated approximately L-shaped metal angles 46 and 48, between which the movable contact 32 can move back and forth.
  • the metal bracket 46 of the lower fixed contact 50 is also fixed in the bottom 4 of the housing 2 and forms a plug outside the housing 2.
  • the metal bracket 48 of the upper fixed contact 52 is also fastened in the base 4, but its contact-carrying leg is relatively long and is extended beyond the fixed contact 52.
  • the extension 54 formed in this way rests on an adjusting screw 56 screwed into the base 4, with which the position of the fixed contact 52 can be adjusted vertically in order to set the reversing switching point of the snap switch 20.
  • the spring tongue 38 In order to set the lower switching point of the snap switch or its actuating force, at which vertically directed force on the spring tongue 38, the movable contact 32 jumps from the lower fixed contact 50 to the upper fixed contact 52, the spring tongue 38 has in its front section an opening which is not visible for reasons of illustration, through which an approximately cylindrical extension 58 of an insert piece 60 protrudes, which has a larger diameter than the opening and abuts the spring tongue 38 from below.
  • the insert 60 is in a helical spring which is supported at the other end on an adjusting screw 62 screwed into a corresponding thread in the base 4.
  • the cylindrical extension 58 of the insert 60 protrudes into the recess 24 in the cylindrical extension 22 of the pressure piece 18 and together with this serves as an anti-rotation device and thus ensures that the pressure peaks 26 each lie opposite the associated spring tongue 38 of the respective snap switch 20, 20b, 20c.
  • the membrane 10 exerts a force on the triangular pressure piece 18 via the plate 12 and the extension 14, which in turn causes this Force is transmitted via the cylindrical extensions 22 at its corners and the triangular pressure peaks 26 formed thereon to the spring tongues 38 of the individual snap switches 20, 20b, 20c.
  • the spring tongue 38 moves downward.
  • the restoring force results essentially from the inherent elasticity of the spring tongue 38, the vertically upward force component of the barrel spring 44 and the spring by virtue of the vertical 62.
  • a safety snap switch 70 Arranged underneath the snap switch 20, as shown in FIG. 2, is a safety snap switch 70 which is designed as a snap switch and which contains two metallic leaf springs 72 and 74 which run approximately parallel and in the direction of the leaf spring 34 of the snap switch 20 and which are at a distance from one another.
  • the leaf springs 72, 74 are each fixed at one end in a sheet metal strip 76, which also protrudes through the bottom 4 and is fastened there; outside the housing 2, the sheet metal strip 76 forms a plug contact.
  • the upper leaf spring 74 is approximately hook-shaped at its free end, so that the angled end thus created is approximately at a distance from the free end of the leaf spring 72 located below.
  • the respectively opposite ends of the two leaf springs 72 and 74 are connected to one another by an omega spring 76, which is hooked onto corresponding extensions with corresponding openings, which cannot be seen in the figures, and which are formed on the free ends of the leaf springs 72 and 74.
  • the lower leaf spring 72 carries in the region of its front end a movable switch contact 80 which, depending on the position of the lower leaf spring 72, either bears on a lower stop formed by an adjusting screw 82 screwed into the base 4 or on a switching contact 84 located above it.
  • the switch contact sits on a sheet metal tab 86, which is integrally formed on the short section 30 of the metal strip 28, in fact the arrangement is such that the tab 86 from an area to the side of the leaf springs 34, 72 and 74 of the snap switch 20 and the safety snap switch 70 protrudes between the leaf springs 72 and 74.
  • the snap switch 20 flips over, the leaf spring 34 pressing the movable contact 32 against the fixed contact, so that a electrically conductive connection is established from the connector formed by the metal strip 28 to the connector formed by the metal bracket 48. If, due to an error in the device to be controlled by the switching device 1, the pressure on the diaphragm 10 continues to rise, the spring tongue 38 is bent further downward. Here it finally reaches a position in which it rests against the leaf spring 74 of the safety snap switch 70.
  • the spring tongue 38 carries a corresponding small insulator 89, for example in the form of a plastic rivet, in the region of the intended contact point with the leaf spring 74. If the pressure on the membrane 10 continues to rise, after the art has been applied Stoffniets 89 to the leaf spring 74 now moves the spring tongue 38 and the leaf spring 74 downwards, whereby after a certain downward movement the hook-shaped bent end of the leaf spring 74 reaches a position in which the leaf spring 72 with the arranged thereon by the action of the omega spring 78 Movable contact 80 is pressed upwards against the fixed contact 84 located above, so that a circuit can be closed via the plug formed by the metal strip 76 and the plug formed by the metal strip 28 and in the device controlled by the switching device 1, a safety circuit, for example switching on the pump motor.
  • a safety circuit for example switching on the pump motor.
  • the actuation paths of the snap switch 20 and the safety snap switch 70 are dimensioned such that the movable contact 32 of the snap switch 20 is pressed with sufficient force against the fixed contact 52 arranged above, even when the safety snap switch 70 is switched over.
  • the pressure on the diaphragm 10 drops, causing the spring tongue 38 and the leaf spring 74 to move upward again.
  • the hook-shaped bent end of the leaf spring 74 reaches a position in which the omega spring 78 moves the leaf spring 72 down again against the adjusting screw 82 and separates the movable contact 80 from the fixed contact 84.
  • the insulating rivet 89 is then released from the safety snap switch 70, so that the switching movement and the switching points of the snap switch 20 are completely free from interference by the safety Unit snap switches 70 are. It follows from this that a change in the elastic forces acting on the snap switch 20 only occurs when the contacts 32 and 52 are already connected to one another. In normal operation, however, the snap switch 20 operates unaffected by the safety snap switch 70.
  • the adjusting screw 82 with which the switching point of the safety snap switch 70 can be set, can also be designed as an electrical contact.
  • the adjusting screw 82 is screwed up, while turning the adjusting screw 82 shifts the switching point of the safety snap switch 70 in the direction of higher pressures on the diaphragm 10.
  • such a safety snap switch 70 can be arranged under each of the three snap switches 20, 20b, 20c.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Push-Button Switches (AREA)
EP19820101035 1981-02-12 1982-02-12 Dispositif de commutation électrique actionné par pression Expired EP0058409B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8103768U 1981-02-12
DE19818103768 DE8103768U1 (de) 1981-02-12 1981-02-12 "Druckbetätigte elektrische Schaltvorrichtung"

Publications (3)

Publication Number Publication Date
EP0058409A2 true EP0058409A2 (fr) 1982-08-25
EP0058409A3 EP0058409A3 (en) 1983-04-06
EP0058409B1 EP0058409B1 (fr) 1985-09-11

Family

ID=6724562

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820101035 Expired EP0058409B1 (fr) 1981-02-12 1982-02-12 Dispositif de commutation électrique actionné par pression

Country Status (4)

Country Link
EP (1) EP0058409B1 (fr)
AU (1) AU8043782A (fr)
DE (1) DE8103768U1 (fr)
ES (1) ES263186Y (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516544A1 (fr) * 1991-05-29 1992-12-02 Dav Commutateur électrique, notamment pour la commande d'équipements et accessoires automobiles
EP0542695A2 (fr) * 1991-11-15 1993-05-19 MA-TER S.r.l. Interrupteur à pression ayant un microrupteur de sécurité actionné manuellement
EP0542696A2 (fr) * 1991-11-15 1993-05-19 MA-TER S.r.l. Interrupteur à pression ayant un microrupteur de sécurité actionné manuellement
EP3772081A1 (fr) * 2019-07-31 2021-02-03 Saginomiya Seisakusho, Inc. Commutateur de pression

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004041403B3 (de) * 2004-08-26 2005-11-24 Elektromanufaktur Zangenstein Hanauer Gmbh & Co. Kgaa Baueinheitlich integrierte Druckschalter- und Druckerfassungsvorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1543230A (fr) * 1900-01-01 Perfectionnements aux dispositifs de réglage thermique à sécurité incorporée
FR2121794A1 (fr) * 1971-01-12 1972-08-25 Danfoss As
FR2184479A2 (fr) * 1972-05-18 1973-12-28 Europ Manufact Ring

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1543230A (fr) * 1900-01-01 Perfectionnements aux dispositifs de réglage thermique à sécurité incorporée
FR2121794A1 (fr) * 1971-01-12 1972-08-25 Danfoss As
FR2184479A2 (fr) * 1972-05-18 1973-12-28 Europ Manufact Ring

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516544A1 (fr) * 1991-05-29 1992-12-02 Dav Commutateur électrique, notamment pour la commande d'équipements et accessoires automobiles
FR2677167A1 (fr) * 1991-05-29 1992-12-04 Dav Commutateur electrique, notamment pour la commande d'equipements et accessoires automobiles.
EP0542695A2 (fr) * 1991-11-15 1993-05-19 MA-TER S.r.l. Interrupteur à pression ayant un microrupteur de sécurité actionné manuellement
EP0542696A2 (fr) * 1991-11-15 1993-05-19 MA-TER S.r.l. Interrupteur à pression ayant un microrupteur de sécurité actionné manuellement
EP0542696A3 (en) * 1991-11-15 1993-07-28 Ma-Ter S.R.L. Pressure switch having a manually operated safety microswitch
EP0542695A3 (en) * 1991-11-15 1993-07-28 Ma-Ter S.R.L. Touch pressure switch including a manually operated safety microswitch
EP3772081A1 (fr) * 2019-07-31 2021-02-03 Saginomiya Seisakusho, Inc. Commutateur de pression

Also Published As

Publication number Publication date
ES263186Y (es) 1984-03-01
AU8043782A (en) 1982-08-19
EP0058409B1 (fr) 1985-09-11
EP0058409A3 (en) 1983-04-06
ES263186U (es) 1982-07-16
DE8103768U1 (de) 1981-09-24

Similar Documents

Publication Publication Date Title
DE2247905C3 (de) Tastenschalteranordnung
DE2515185C3 (de) Elektrischer Schnappschalter
DE2917557C2 (de) Wärmeschutzschalter
EP0088747B1 (fr) Interrupteur thermique
DE102006031584A1 (de) Miniaturisierter elektrischer Schalter
DE1523661B2 (de) Druckabhaengiger elektrischer membranschalter mit einem druckunterschied zwischen einschaltpunkt und ausschaltpunkt
EP0058409A2 (fr) Dispositif de commutation électrique actionné par pression
DE2531841C3 (de) Elektrischer Schnappschalter
DE1490817B1 (de) Druckschalter
DE2448329A1 (de) Elektrischer druckschalter, insbesondere fuer die fuellhoehensteuerung in geschirrspuel- und waschmaschinen
DE3043811C2 (de) Endschalter
DE3821425C1 (fr)
DE3442173A1 (de) Elektrischer schalter gedrungener bauart
EP0026449B1 (fr) Interrupteur multiple actionné par pression
DE3617049A1 (de) Sicherheitsunterbrecher mit zwangsoeffnung seiner ruhekontakte
DE2530226C3 (de) Endschalter
DE3130244C2 (de) "Tastenschalter"
DE1263136B (de) Stoesselschnappschalter mit zwei Ein-Stellungen und einer dazwischenliegenden Aus-Stellung
DE1490740C3 (de) Thermoschalter
DE2745548C3 (de) Eigensicherer Temperaturbegrenzer
DE1055649B (de) Temperaturabhaengiger elektrischer Schalter mit Rueckstelleinrichtung
DE2254763C3 (de) Endschalter
DE2842620C2 (fr)
DE2532092C3 (de) Lenkstockschalter mit am Schaltteil angeformten Schaltglied
DE1907419A1 (de) Elektrischer Schalter mit Schnappsystem

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): FR GB IT SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): FR GB IT SE

RHK1 Main classification (correction)

Ipc: H01H 35/24

17P Request for examination filed

Effective date: 19830430

ITF It: translation for a ep patent filed

Owner name: ING. C. GREGORJ S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): FR GB IT SE

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19921215

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930210

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19940212

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19940213

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940212

EUG Se: european patent has lapsed

Ref document number: 82101035.2

Effective date: 19940910

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19991228

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011031

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST