EP0880158A2 - Elektromagnetisches Relais mit einer bistabilen Drucktaste für Sicherheitsprüfung - Google Patents

Elektromagnetisches Relais mit einer bistabilen Drucktaste für Sicherheitsprüfung Download PDF

Info

Publication number
EP0880158A2
EP0880158A2 EP97203270A EP97203270A EP0880158A2 EP 0880158 A2 EP0880158 A2 EP 0880158A2 EP 97203270 A EP97203270 A EP 97203270A EP 97203270 A EP97203270 A EP 97203270A EP 0880158 A2 EP0880158 A2 EP 0880158A2
Authority
EP
European Patent Office
Prior art keywords
button
push
cover
contacts
electromagnetic relay
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
EP97203270A
Other languages
English (en)
French (fr)
Other versions
EP0880158A3 (de
EP0880158B1 (de
Inventor
Piero Giordanino
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.)
Finder SpA
Original Assignee
Finder SpA
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 Finder SpA filed Critical Finder SpA
Publication of EP0880158A2 publication Critical patent/EP0880158A2/de
Publication of EP0880158A3 publication Critical patent/EP0880158A3/de
Application granted granted Critical
Publication of EP0880158B1 publication Critical patent/EP0880158B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/32—Latching movable parts mechanically
    • H01H50/326—Latching movable parts mechanically with manual intervention, e.g. for testing, resetting or mode selection

Definitions

  • the present invention refers to an electromagnetic relay equipped with bi-stable safety test push-button.
  • relays Various types of relay are known in the art, these relays being equipped both with Light Emitting Diodes (LED) indicating the active and inactive status of the relay itself, and with test push-buttons: by pressing these push-buttons, a user is able to close circuit contacts to detect its operation.
  • LED Light Emitting Diodes
  • test push-buttons are of two types: the first type, so-called “mono-stable”, allows, by pressing it, to close the circuit for the test, but, once released, returns into its rest position, opening the circuit again.
  • the second type of known push-button is the so-called "bi-stable" one (a type of bi-stable push-button is manufactured by Relpol) and is configured in such a way as to assume a circuit closing position both temporarily, after having pressed it, and permanently, that is by displacing it into a fixed position.
  • This possibility poses some problems, above all linked to plant and people safety: first of all, if the push-button is forgotten into its fixed actuation position, the circuit remains closed even when it should not be (that is, at the end of testing) and could damage plants or machines controlled thereby.
  • their fixed actuation can be simply and quickly carried out, even casually and by untrained people or by people that have no intention to carry out tests: all these generate risks that can be easily thought of.
  • Object of the present invention is solving the above prior art problems, providing an electromagnetic relay equipped with a bi-stable test push-button that allows realizing the two working positions in a simple, but simultaneously efficient way, and above all a safe way, since inadvertent and undesired actuations are practically prevented.
  • the electromagnetic relay of the present invention is substantially composed of a cover 1, usually made of transparent plastic material, and of a body 3 including a support base 5 and a set of known electric components, that will not be described hereinbelow, apart from the major ones that have some relevance to the present invention.
  • the base 5 of the relay body 3 is equipped with a set of lamellar terminals 7, 7', 7'' for the adequate connections, some of these terminale 7, 7' being equipped with enlarged internal ends 9, 9' in turn equipped with contacts 11, 11'.
  • a contact member 13 is placed (commonly realized as small copper blades) that in turn is equipped with two contacts 14, 14' on its two sides, and that can assume two different contact positions, in which the two different pairs of contacts 11, 11' will be contacted.
  • the two operating positions of the contact member 13 are controlled by energizing or de-energizing a coil 15, that attracts or releases the contact member 13 itself, that is supported by a support 15' and is taken back to its rest position by a resilient member 15''.
  • the push-button 16 of the present invention is different from the known ones because, in order to actuate it, a set of specific operations are necessary, that make a casual actuation as well as an actuation carried out in any undesired way, impossible.
  • the push-button 16 is realized, in a first embodiment thereof, as best shown in Figures 7 to 9.
  • the push-button 16 is composed of a small elongated cylinder 18, at one end of which a projection 2 ⁇ is obtained so that the push-button 16 gets the shape of a key.
  • the small cylinder 18 is equipped with a tooth 21 whose function is preventing the cylinder from coming out of the relay in its rest position.
  • the push-button is equipped with an elongated head 22 shaped as an arrow with a bit 24 on one side and a seat 26 for screwdrivers with normal or star bit.
  • the relay of the present invention must further be equipped with a suitable cover 1, that is best shown in Figures 4 to 6.
  • the cover 1 is shaped in order to have a housing 28 for the push-button 16 in its rest position, and an hole 3 ⁇ with a keyway 32.
  • the hole allows inserting the small cylinder 18 of the push-button 16 inside a cylindric housing 34, also shaped in order to receive the cylinder 18 with the key projection 2 ⁇ into the seat 32.
  • a plurality of holes 36 with varying diameters are provided, said holes being adapted to contain corresponding projections of the front plate 33 of the relay that will be placed on the upper side of the cover 1.
  • the cover 1 is finally equipped with a special safety feature, composed of a retainer tooth 38 made of plastic material, that can be easily broken down and detached from the cover 1 if one wishes to actuate the push-button 16 in its permanent test contact position. Otherwise, this retainer tooth 38 does not allow opening the push-button 16 by rotating it, only allowing it to be operated by pressing and releasing it as typical of mono-stable push-buttons.
  • the push-button 16 in Fig. 1 finds itself in a rest position, where a connection occurs between lower contacts 11 of the terminals 7 and upper contacts 14 of the contact member 13. From this position, by a finger pressure, the upper contacts 11' of the terminals 7 can be brought into connection with the lower contacts 14' of the contact member 13, as better shown in Fig. 2. Upon releasing the finger pressure, the push-button 16 will go back to the position in Fig. 1: it will therefore operate as mono-stable push-button.
  • the push-button 16 If one wishes to operate the push-button 16 as bi-stable, it will be firstly be necessary to break down and detach the retainer tooth 38 from the cover 1 and then, by acting through a suitable screwdriver, to push and simultaneously rotate (in a counterclockwise and upward direction with respect to the drawings) the push-button 16: in this way, this pushing actuates the connection between contacts 11' and 14' as shown in Fig. 2, and the rotation frees the projection 2 ⁇ from the keyway into the cylindric housing 34, so that, into the final contact position shown in Fig. 3, the projection 2 ⁇ abuts against the cylindric housing 34 and keeps the push-button 16 into the connection position in Fig. 3.
  • Figures 1 ⁇ to 12 show a second embodiment of the electromagnetic relay of the present invention, that performs the main functions already pointed out for the first embodiment thereof.
  • a slider 4 ⁇ is provided, this slider being equipped with a recess 42 for pushing it with the fingers, and with a plurality of retainer notches 44, in addition to an opening 46 (in the embodiments shown in a squared shape) through which it is possible to access to the head 47 of the bi-stable type of push-button 48.
  • the slider 4 ⁇ is so shaped as the walls of the recess 42 can pushingly abut on an appendix 5 ⁇ of the push-button 48, this appendix 5 ⁇ making a sort of inclined plane: the cooperation between this appendix 5 ⁇ and the walls of the recess 42 allows taking the push-button 48 progressively from its rest position to its fixed contact position with common contacts (not shown).
  • the push-button 48 is equipped with an elongated stem 52 on which the above appendix 5 ⁇ is placed, and on which retainer teeth 54 are provided to prevent it from coming out of the cover 39.
  • this embodiment of the relay of the present invention provides a normal pushing operation of the push-button 48 to temporarily close and open the contact when testing. If, instead, one wishes to fixedly close the contacts, it is simply necessary to push the slider 4 ⁇ towards the cover 39 exterior through a sliding actuated, for example, by one's fingers: in this way, the walls of the recess 42 will push the appendix 5 ⁇ and thereby the push-button 48 downwards, that is towards the contact position, and they will keep it pressed in such position till the rest status is recovered, always by sliding the cursor 4 ⁇ backwards.
  • the retainer notches 44 establish and make the two final rest and outgoing positions of the slider 4 ⁇ unmovable.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Catching Or Destruction (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Alarm Systems (AREA)
  • Relay Circuits (AREA)
  • Fire Alarms (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
EP97203270A 1997-05-20 1997-10-21 Elektromagnetisches Relais mit einer bistabilen Drucktaste für Sicherheitsprüfung Expired - Lifetime EP0880158B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97TO000426A IT1292317B1 (it) 1997-05-20 1997-05-20 Rele' elettromagnetico dotato di pulsante di test bistabile di sicurezza.
ITTO970426 1997-05-20

Publications (3)

Publication Number Publication Date
EP0880158A2 true EP0880158A2 (de) 1998-11-25
EP0880158A3 EP0880158A3 (de) 1999-05-26
EP0880158B1 EP0880158B1 (de) 2004-08-04

Family

ID=11415717

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97203270A Expired - Lifetime EP0880158B1 (de) 1997-05-20 1997-10-21 Elektromagnetisches Relais mit einer bistabilen Drucktaste für Sicherheitsprüfung

Country Status (4)

Country Link
EP (1) EP0880158B1 (de)
AT (1) ATE272893T1 (de)
DE (1) DE69730119T2 (de)
IT (1) IT1292317B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1081732A2 (de) * 1999-08-31 2001-03-07 Matsushita Electric Works, Ltd. Electromagnetisches Relais
CN110265263A (zh) * 2019-07-19 2019-09-20 贾松 一种电磁继电器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3733568A (en) * 1971-09-30 1973-05-15 Essex Push button relay
US4378543A (en) * 1981-11-18 1983-03-29 Gulf & Western Manufacturing Company Latch relay with manual reset and test
DE8908125U1 (de) * 1989-07-04 1989-08-24 Tripus-Kunststoffteile Gmbh, 8870 Guenzburg, De
EP0408544A2 (de) * 1989-07-12 1991-01-16 EH-SCHRACK COMPONENTS Aktiengesellschaft Relais
EP0534572A2 (de) * 1991-09-26 1993-03-31 Holec Systemen En Componenten B.V. Elektrisches bistabiles Relais

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3733568A (en) * 1971-09-30 1973-05-15 Essex Push button relay
US4378543A (en) * 1981-11-18 1983-03-29 Gulf & Western Manufacturing Company Latch relay with manual reset and test
DE8908125U1 (de) * 1989-07-04 1989-08-24 Tripus-Kunststoffteile Gmbh, 8870 Guenzburg, De
EP0408544A2 (de) * 1989-07-12 1991-01-16 EH-SCHRACK COMPONENTS Aktiengesellschaft Relais
EP0534572A2 (de) * 1991-09-26 1993-03-31 Holec Systemen En Componenten B.V. Elektrisches bistabiles Relais

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1081732A2 (de) * 1999-08-31 2001-03-07 Matsushita Electric Works, Ltd. Electromagnetisches Relais
EP1081732A3 (de) * 1999-08-31 2002-09-18 Matsushita Electric Works, Ltd. Electromagnetisches Relais
CN110265263A (zh) * 2019-07-19 2019-09-20 贾松 一种电磁继电器

Also Published As

Publication number Publication date
EP0880158A3 (de) 1999-05-26
ITTO970426A1 (it) 1998-11-20
ATE272893T1 (de) 2004-08-15
ITTO970426A0 (de) 1997-05-20
DE69730119D1 (de) 2004-09-09
EP0880158B1 (de) 2004-08-04
DE69730119T2 (de) 2005-08-18
IT1292317B1 (it) 1999-01-29

Similar Documents

Publication Publication Date Title
US5352132A (en) Extension cord
CA2572291A1 (en) Pull out air gap switch for wallbox-mounted dimmer
KR20020084149A (ko) 콘센트
DE50302931D1 (de) Steckdose für elektrische Steckverbindungen
EP1643529B1 (de) Wippschalter mit Auslösestatusanzeiger
CA1059591A (en) Safety plug-in jack base
EP0061866A1 (de) Schalter mit Schwenkhebel und mit einem Schloss
EP0880158A2 (de) Elektromagnetisches Relais mit einer bistabilen Drucktaste für Sicherheitsprüfung
CA2008256A1 (en) Auxiliary switch retainer for circuit breakers and actuator member
US5047598A (en) Safety rocker with improved actuator mounting
US4401958A (en) Electromagnetic trigger switch
US4329555A (en) Trigger operated tool handle switch
JPH02996Y2 (de)
US6204449B1 (en) Projections on face electrical receptacle for preventing inadvertent tripping of test switch by oversized electrical plug
JP2003141981A (ja) 漏電保護プラグ
IE20030847A1 (en) Electric plug socket
US3977751A (en) Release mechanism for plug in-type terminals
JPH04233120A (ja) 過負荷継電器
EP0012520A1 (de) Druckknopf-betätigter Schalter im Handgriff eines Werkzeuges
EP0883148A3 (de) Betätigungsvorrichtung für Lastschalter mit Schalter zum Ausserbetriebsetzen
CN211858560U (zh) 具有防误合闸机构的断路器和5g配电柜
EP2317611B1 (de) Abgesicherte, abschaltbare Steckdose mit Drehtrennschalter
JPH05114425A (ja) 電線接続装置
CN217589660U (zh) 一种插座
JP4114327B2 (ja) 押釦スイッチ装置

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

Kind code of ref document: A2

Designated state(s): AT DE FR GB

AX Request for extension of the european patent

Free format text: AL;LT;LV;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;RO;SI

17P Request for examination filed

Effective date: 19990713

AKX Designation fees paid

Free format text: AT DE FR GB

17Q First examination report despatched

Effective date: 20030808

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 69730119

Country of ref document: DE

Date of ref document: 20040909

Kind code of ref document: P

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

ET Fr: translation filed
26N No opposition filed

Effective date: 20050506

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 19

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 20

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

Ref country code: DE

Payment date: 20161023

Year of fee payment: 20

Ref country code: GB

Payment date: 20161027

Year of fee payment: 20

Ref country code: FR

Payment date: 20161024

Year of fee payment: 20

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

Ref country code: AT

Payment date: 20161019

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69730119

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20171020

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK07

Ref document number: 272893

Country of ref document: AT

Kind code of ref document: T

Effective date: 20171021

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

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20171020