EP0249810B1 - Interrupteur électrique - Google Patents

Interrupteur électrique Download PDF

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Publication number
EP0249810B1
EP0249810B1 EP87108048A EP87108048A EP0249810B1 EP 0249810 B1 EP0249810 B1 EP 0249810B1 EP 87108048 A EP87108048 A EP 87108048A EP 87108048 A EP87108048 A EP 87108048A EP 0249810 B1 EP0249810 B1 EP 0249810B1
Authority
EP
European Patent Office
Prior art keywords
contact
actuating element
switch
chamber
rod
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
EP87108048A
Other languages
German (de)
English (en)
Other versions
EP0249810A2 (fr
EP0249810A3 (en
Inventor
Wilfried Dünki
Werner Saxer
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT87108048T priority Critical patent/ATE79198T1/de
Publication of EP0249810A2 publication Critical patent/EP0249810A2/fr
Publication of EP0249810A3 publication Critical patent/EP0249810A3/de
Application granted granted Critical
Publication of EP0249810B1 publication Critical patent/EP0249810B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/16—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/16—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift
    • H01H3/168—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift operated by movement in any direction

Definitions

  • the present invention relates to an electrical switch according to the preamble of claim 1 and to an accident protection device on a machine with such a switch.
  • a switch of the type mentioned is known from US-A-2 471 841. In the rest position, it breaks a circuit and closes it in the work position. In addition, he could not meet the requirement for a safety switch to protect machine operators from accidents because the switching paths are not short enough and are not constant. Furthermore, it only switches when the force is applied in certain directions.
  • a switch is also known with an actuating cam on a plate disk which carries a contact ring.
  • the contacts are interrupted and closed only in different selected working positions.
  • the contacts can be connected individually or in pairs through the contact ring.
  • the plate washer is guided on four vertical guides, which are rectangular in cross section, and which laterally surrounds them with corresponding recesses.
  • the present invention has for its object to provide a switch, the actuator can be acted upon from a variety of different directions in order to perform the switch function inevitably and with the same switching paths. According to the invention, this object is achieved by the characterizing features of claim 1.
  • a switch according to the invention is arranged in an accident prevention device according to claim 4 or the rod is arranged, for example, at a short distance in front of the inlet nip of a pair of rollers of a printing press, only a slight displacement of the rod is required to interrupt the circuit. If, for example, a finger is pushed between a roller and the rod, the displacement path of the rod on the finger translates in proportion to the distance from the switch, so that this practically interrupts the circuit and switches off the machine. If the protective device is designed according to claim 4, the above-mentioned translation effect occurs at every point on the rod, so that the protective device can be implemented practically in any desired sensitivity.
  • a housing shell 3 with an opening 4 is screwed onto a rotationally symmetrical base body 1 with an external thread 2.
  • Base body 1 and housing jacket 3 consist of an electrically insulating material.
  • a contact pin 5 is seated axially in the base body 1 and can be connected to a circuit at 6.
  • the base body 1 forms a flat support 7, which is surmounted by the free end 8 of the contact pin 5.
  • the housing jacket 3 is provided with a cylindrical inner surface 9 within which a disk-shaped part 10 of the movable contact 11 is mounted.
  • the peripheral surface of the disk-shaped part 10 is rounded in cross section, the radius R being at least approximately the same in the diameter of the part 10.
  • the part 10 also lies with little play in the housing shell 3, so that it can be pivoted in the manner shown in FIG. 2.
  • An actuating cam 13 adjoins the disk-shaped part 10 of the movable contact 11 axially, the outer end of which is rounded.
  • the lateral distance between the actuating cam 13 and the opening 4 is so large that the disk-shaped part 10 can be pivoted in the manner shown in FIG. 2 in which it is lifted off the end 8 of the contact pin 5.
  • a foam rubber ring 14 is further inserted, which is prestressed when the housing cover 3 is screwed onto the base body 1 and presses the disc-shaped part 10 against the end 8 of the contact pin 5, which acts as a spacer, so that there is a slight distance 15 of a few tenths of a millimeter between the edge 12 and the support 7 and a current flow from the fixed to the movable contact 6 or 11 is possible.
  • the fixed contact 5 and the movable contact 11 consist of electrically conductive material. If the switch with the connection point 6 and the actuating cam 13 is connected in a circuit, each lateral force component on the cam 13 causes the disk-shaped part 10 to pivot or tilt as shown in FIG.
  • the sensitivity of the switch can be within wide limits be varied.
  • FIGS. 1 and 2 show a use of the switch according to FIGS. 1 and 2 in a safety device on a printing press.
  • Two switches are attached to the cheeks 16 of the machine stand in a symmetrical arrangement. These are arranged in a circuit 17 which interrupts the machine drive.
  • the actuating cams 13 of the two switches are connected to one another in an electrically conductive manner by a tube 18 which is loosely pushed over them.
  • the tube is arranged as close as possible to the inlet nip between printing unit rollers 19 (the upper one is not shown) and in a parallel alignment to these.
  • the elastic preload of the sponge rubber rings 14 must be so great that, despite the weight of the tube 18, the fixed and movable contacts 5 and 11 touch, or the edge 12 and the support 7 are aligned in parallel and thereby close the circuit 17 . If, for example, an operator reaches with a finger or hand at 20 between the tube 18 and one of the two pressure rollers 19 forming the inlet gap, the tube 18 is pressed slightly away from the pressure roller 19, with the tube ends pivoting the actuating cams 13.
  • a housing body 20 is provided with a blind hole 21 which forms a cylindrical inner surface 9 ⁇ .
  • the movable contact 11 is arranged, the disc-shaped part 10 ⁇ has an electrically conductive layer on the end face.
  • the laterally raised edges of part 10 ⁇ are rounded, the radius of curvature R ⁇ being at least approximately equal to its diameter.
  • the 7 ⁇ of the support Blind hole 21 facing edge 12 ⁇ of part 10 ⁇ also lies in one plane.
  • the movable contact 11 ⁇ has on the side facing away from the edge 12 ⁇ an annular shoulder which is in contact with a prestressed foam rubber ring 14 ⁇ , which in turn is supported against an annular disk 23 held by a snap ring 22.
  • the snap ring 22 is seated in an annular groove open in the cylindrical inner surface.
  • the movable contact 11 ⁇ extends through the sponge rubber ring 14 ⁇ , the washer 23 and the snap ring 22 to the outside and forms a socket-like actuation cam 24 with a circular access opening, which is delimited by an annular rib 25 with a rounded cross section. If (as in the application example according to FIG. 3) a tube 18 ⁇ with one end is pushed into the actuating cam 24, the movable contact 11 ⁇ can be pivoted on all sides, the sponge rubber ring 14 Edinburgh generating a restoring force which wants to align the edge 12 ⁇ parallel to the support 7 ⁇ .
  • the support 7 ⁇ of the blind hole 21 is axially surmounted by the end 8 ⁇ of the fixed contact pin 5 ⁇ , which holds the non-pivoted, disc-shaped part 10 ⁇ at a distance 15 ⁇ from the plane 7, when it is pressed under the uniform pressure of the foam rubber ring 14 ⁇ against the contact pin 5 ⁇ .
  • the outer end of the contact pin 5 ⁇ is used to connect an electrical conductor.
  • a second bore 26 is in the bottom of the housing body 20 parallel to the fixed contact 5 ⁇ a pin-shaped conductor 27 axially displaceable therein.
  • the conductor 27 is pressed by a prestressed coil spring 28 beyond the plane 7 ⁇ into a constant contact with the conductive layer of the part 10 ⁇ .
  • the outer end of the conductor 27 is used to connect an electrical line, the conductor connections mentioned being covered by a removable protective hood which is detachably connected to the housing body 20.
  • the conductor 27 always remains in contact with the movable contact 11 ⁇ , which is lifted by tilting on the support 7 ⁇ from the tip 8 ⁇ of the fixed contact pin 5 ⁇ .
  • the foam rubber ring 14 ⁇ pushes the disk-shaped part 10 ⁇ and the movable contact pin 27 back until it touches the contact pin 5 ⁇ again and closes the circuit.
  • the foam rubber ring 14 or 14 ⁇ can be replaced by a coil spring.
  • the contact pin 5 ' is surrounded by an insulator 35, on which a contact ring 36 is pushed axially and with play and is pressed against a stop 38 by a spring 37.
  • the springs 31 and 37 can be connected to electrical circuits. If a force is applied to the cam 13 ', the ring disk 30 is pivoted or tilted away from the contact disk 33 and the circuit 39 is interrupted. When this force application moves the movable contact 11 ⁇ axially until its washer 30 touches the contact ring 36, the circuit 40 which has been interrupted until then is closed.
  • the conductor 27 can be arranged in a housing-fixed manner in an annular groove surrounding the contact pin 7.
  • An electrically conductive, spring-loaded coil spring made of beryllium bronze is arranged in this annular groove. This is in any position of the movable contact 11 ⁇ with its conductive layer on the one hand and the conductor 27 on the other in contact.
  • the bias of this electrically conductive spring must, however, be less than that of the foam rubber ring 14 ⁇ or a spring instead of this.
  • the movable contact 11 ⁇ has a circular disk 29 with a rounded, peripheral surface. With this, the actuating cam 13 ⁇ is firmly connected. Both are made of insulating material. It also has (11 ⁇ ) an electrically conductive washer 30 which is always held in contact with the washer 29 ⁇ by a helical spring 31.
  • the Ring disk 30 is provided with a central bore 32.
  • the stationary contact pin 5 ⁇ protrudes through the bore 32 and is provided at the free end with a contact disk 33. This lies in a blind hole 34 in the disk 29 and has a larger diameter than the bore 32. When the washer 30 is in current contact with the contact disk 33, the washer 29 lies against the annular support 7 ring.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Push-Button Switches (AREA)
  • Lock And Its Accessories (AREA)
  • Air Bags (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Relay Circuits (AREA)
  • Switches With Compound Operations (AREA)

Claims (4)

  1. Interrupteur électrique comprenant un boîtier (1, 3) définissant une chambre cylindrique contenant un élément de manoeuvre (10, 10', 29) circulaire, monté mobile dans la chambre, soumis à un organe-ressort (14, 14', 31), cet élément de manoeuvre coopérant avec un appui (7, 7', 7") associé, l'élément de manoeuvre (10, 10', 29) étant orienté transversalement par rapport à la chambre lorsqu'il est en position de repos et cet élément de manoeuvre peut être basculé dans une position de travail par l'intermédiaire d'une came de manoeuvre (13, 13', 13") accessible de l'extérieur du boîtier, par un mouvement de tous côtés, avec déformation de l'organe-ressort (14, 14', 31) et en prenant appui sur l'appui (7, 7', 7"), ainsi qu'un premier contact électrique solidaire du boîtier et un second contact électrique dans la chambre, ces contacts étant reliés en permanence à un circuit électrique (17, 39), interrupteur caractérisé en ce que :
    - l'élément de manoeuvre (10, 10', 29) porte le second contact,
    - l'élément de manoeuvre (10, 10', 29), en position de repos, sous l'action de l'organe-ressort (14, 14', 31) fait toucher le second contact avec le premier contact (5, 5', 5") pour fermer le circuit électrique (17, 39) au niveau de l'interrupteur,
    - l'élément de manoeuvre (10, 10', 29) présente une surface enveloppe périphérique convexe par laquelle, en position de repos, il est adjacent de tous côtés à la paroi cylindrique (9),
    - en position de repos de l'élément de manoeuvre (10, 10', 29), l'appui (7, 7', 7") s'étend le long du bord de l'élément de manoeuvre (10, 10', 29) et se trouve à distance régulière de celui-ci,
    et lorsqu'une force est exercée sur la came de manoeuvre (13, 13', 13"), le circuit électrique (17, 39) est interrompu par le basculement de l'élément de manoeuvre (10, 10', 29).
  2. Interrupteur électrique selon la revendication 1, caractérisé en ce que le premier contact (5, 5', 5") est monté coaxialement dans la chambre cylindrique.
  3. Dispositif de protection contre les accidents pour une machine ou un appareil équipé d'un interrupteur selon la revendication 1 ou 2, pour couper le circuit électrique du moteur de la machine ou de l'appareil, caractérisé en ce que l'accès à la zone dangereuse de la machine ou de l'appareil est barré par une barre (18, 18') et en ce que la barre (18, 18') est articulée aux cames de commande (13, 13', 13") par l'une de ses extrémités et en ce que l'interrupteur sert de palier pour cette extrémité de barre, et en ce que la barre (18, 18') est tenue par son autre extrémité par un corps de palier.
  4. Dispositif de protection selon la revendication 3, caractérisé en ce que le corps de palier de l'autre extrémité de la barre est également un interrupteur selon les revendications 1 ou 2 et en ce que la seconde extrémité de barre est articulée à la came de manoeuvre (13, 13', 13") de cet interrupteur.
EP87108048A 1986-06-20 1987-06-04 Interrupteur électrique Expired - Lifetime EP0249810B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87108048T ATE79198T1 (de) 1986-06-20 1987-06-04 Elektrischer schalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2499/86A CH671480A5 (fr) 1986-06-20 1986-06-20
CH2499/86 1986-06-20

Publications (3)

Publication Number Publication Date
EP0249810A2 EP0249810A2 (fr) 1987-12-23
EP0249810A3 EP0249810A3 (en) 1989-10-04
EP0249810B1 true EP0249810B1 (fr) 1992-08-05

Family

ID=4235178

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108048A Expired - Lifetime EP0249810B1 (fr) 1986-06-20 1987-06-04 Interrupteur électrique

Country Status (6)

Country Link
US (1) US4785146A (fr)
EP (1) EP0249810B1 (fr)
JP (1) JPS634517A (fr)
AT (1) ATE79198T1 (fr)
CH (1) CH671480A5 (fr)
DE (1) DE3780873D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10054677A1 (de) * 2000-11-03 2002-05-29 Siemens Ag Drucktastschalter

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0628753Y2 (ja) * 1988-01-19 1994-08-03 株式会社東海理化電機製作所 スイッチ装置
SE9603603L (sv) * 1996-10-02 1998-04-03 Kjell Andersson Säkerhetsbrytare för industrirobotar

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1763746A (en) * 1926-03-26 1930-06-17 Benkiser Paul Gas and vapor separator
US2466402A (en) * 1944-11-30 1949-04-05 George L Falk Electric switch
US2471841A (en) * 1946-07-08 1949-05-31 Harry G Sells Multiple circuit switch
US2626999A (en) * 1950-03-07 1953-01-27 Frederick O Johnson Control device
US2793259A (en) * 1954-04-12 1957-05-21 John B Parsons Switch mechanism
FR1445728A (fr) * 1965-06-04 1966-07-15 Ericsson Telefon Sfe Fse Dispositif de contacts multiples
US4001534A (en) * 1975-06-27 1977-01-04 Temple James E Switch assemblies
JPS5613623A (en) * 1979-07-14 1981-02-10 Matsushita Electric Works Ltd Limit switch
US4315113A (en) * 1980-01-18 1982-02-09 Harman International Industries, Inc. Actuator switch for remote control rearview mirrors
DE3018385A1 (de) * 1980-05-14 1982-01-21 Bayer Ag, 5090 Leverkusen Verfahren zur behandlung von fasermaterialien
JPS5795764A (en) * 1980-12-04 1982-06-14 Matsushita Electric Ind Co Ltd Protecting device for television receiver
US4370528A (en) * 1981-03-16 1983-01-25 Eaton Corporation Miniature sealed toggle switch
US4394548A (en) * 1982-03-08 1983-07-19 Amp Incorporated Joystick switch
JPS5945504B2 (ja) * 1982-07-23 1984-11-07 徹志 小島 溶着電気コテにおける溶着部補修用コテ先
FR2532106B1 (fr) * 1982-08-20 1985-10-25 Radiotechnique Compelec Dispositif interrupteur a plusieurs voies, tel qu'une comman de multidirectionnelle pour jeu electronique
FR2543502B1 (fr) * 1983-03-31 1988-12-30 Dba Maitre-cylindre a contacteur electrique de " stop "
FR2559305B1 (fr) * 1984-02-08 1986-10-17 Telemecanique Electrique Manipulateur analogique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10054677A1 (de) * 2000-11-03 2002-05-29 Siemens Ag Drucktastschalter

Also Published As

Publication number Publication date
US4785146A (en) 1988-11-15
EP0249810A2 (fr) 1987-12-23
JPS634517A (ja) 1988-01-09
EP0249810A3 (en) 1989-10-04
ATE79198T1 (de) 1992-08-15
DE3780873D1 (de) 1992-09-10
CH671480A5 (fr) 1989-08-31

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