EP3244430B1 - Dispositif de conversion de mouvements mecaniques en signal de commutation electrique - Google Patents

Dispositif de conversion de mouvements mecaniques en signal de commutation electrique Download PDF

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Publication number
EP3244430B1
EP3244430B1 EP16168708.2A EP16168708A EP3244430B1 EP 3244430 B1 EP3244430 B1 EP 3244430B1 EP 16168708 A EP16168708 A EP 16168708A EP 3244430 B1 EP3244430 B1 EP 3244430B1
Authority
EP
European Patent Office
Prior art keywords
snap
switching signal
housing
piezoelectric element
accordance
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.)
Active
Application number
EP16168708.2A
Other languages
German (de)
English (en)
Other versions
EP3244430A1 (fr
Inventor
Volker Knüppel
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.)
Rafi GmbH and Co KG
Original Assignee
Rafi GmbH and Co KG
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 Rafi GmbH and Co KG filed Critical Rafi GmbH and Co KG
Priority to EP16168708.2A priority Critical patent/EP3244430B1/fr
Publication of EP3244430A1 publication Critical patent/EP3244430A1/fr
Application granted granted Critical
Publication of EP3244430B1 publication Critical patent/EP3244430B1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/14—Operating parts, e.g. push-button
    • H01H13/18—Operating parts, e.g. push-button 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. door switch, limit switch, floor-levelling switch of a lift
    • H01H13/183—Operating parts, e.g. push-button 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. door switch, limit switch, floor-levelling switch of a lift for actuation by moving a closing member, e.g. door, cover
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/48—Snap-action arrangements depending upon deformation of elastic members using buckling of disc springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H27/00—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings
    • H01H27/002—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings wherein one single insertion movement of a key comprises an unlocking stroke and a switch actuating stroke, e.g. security switch for safety guards

Definitions

  • the invention relates to a device for converting mechanical feed movements into an electrical switching signal, by means of which an electrical device, for example a machine tool, a telephone or the like, can be controlled or operated, according to the preamble of patent claim 1.
  • Such devices are used as an interface between man and machine or device in use and usually consist of a plurality of actuators, which are held axially guided in a recess incorporated in a housing.
  • the individual actuating elements act on a snap disk supported on the housing, which is arched in the direction of the actuating element and is made of an electrically conductive metallic material.
  • the domes are therefore biased and are moved when moving down the actuator in the direction of a circuit board provided on a switching contact.
  • the snap disc has the property that it undergoes an opposite bulge when bending compared to their starting position and when snapping the snap disc a switching signal is electrically detectable.
  • the snap-action disc Upon actuation of the snap-action disc, the latter generates an electrical connection with the opposite switching contact, so that a short-circuit arises, which is detected and processed by an electrical evaluation and control device. As soon as a corresponding short circuit is detected by the evaluation and control unit, the electrical device or the machine tool can be controlled accordingly.
  • an electrical evaluation and control device As soon as a corresponding short circuit is detected by the evaluation and control unit, the electrical device or the machine tool can be controlled accordingly.
  • FIGS. 1a and 1b a device 1 is shown, through which a manual or mechanically generated feed movement can be generated in an electrical switching signal 12, through which an electrical device, such as a machine tool, a telephone, a kitchen appliance or the like, can be operated.
  • an electrical device such as a machine tool, a telephone, a kitchen appliance or the like
  • the device 1 consists of a housing 3, in which at least one recess 4 is incorporated.
  • an actuating element 5 is mounted axially movable, which is formed from an externally accessible actuating plunger 6 and a spherical membrane 8.
  • the actuating plunger 6 is according to FIG. 1b 2 acted upon with a delivery force, so that it is pressed or retracted into the interior of the housing 3.
  • the actuating plunger 6 rests on the spherical membrane 8, which is fixedly coupled to the housing 3.
  • the ball membrane 8 rests on the top side of a snap-action disc 9, which is dome-shaped or dome-shaped in the direction of the actuating element 5 in the unactuated state according to FIG FIG. 1a is bulged.
  • the snap disc 9 is made of an electrically conductive metallic material.
  • the snap disc 9 has a bias, similar to a helical compression spring in the tensioned state, which counteracts the feed force 2.
  • a circuit board 10 is provided, on which an electrical contact surface 11 is provided.
  • the button 11 is arranged below the respective snap disc 9.
  • the snap disc 9 is pressed by the feed force 2 in the direction of the button 11 and snaps the snap disc 9, it is connected to the switching contact on the circuit board 11 in the form of a short circuit, so that an electrical switching signal 12 is generated.
  • the resistance force which acts from the snap disk 9 against the feed force 2, considerably reduced, since this falls almost to zero.
  • Due to the drop in the feed force 2 due to the snap action of the snap disk 9, a pulse signal 22 generated by a piezoelectric element 21 is produced. Both the switching signal 12 and the pulse signal 22 are detected by an evaluation and control device 13.
  • the switching signal 12 is used to control an electrical device and the signal 22 as a redundant electrical pulse in such a way that the pulse signal 22 instantaneously to the time of snapping the snap disk 9 following the switching signal 12 is formed. Even with a slight time difference between the generation of the switching signal 12 and the formation of the pulse signal 22, the switching signal 12 is not passed from the evaluation and control device 13 to the electrical device or forwarded.
  • the pulse signal 22 thus serves for the redundant verification of the generation of the switching signal 12.
  • FIGS. 1a and 1b is the respective piezo-element 21 mounted on the actuating plunger 6.
  • the piezoelectric element 21 provided in the region of the housing and designed annular or parallelepiped.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
  • Push-Button Switches (AREA)

Claims (7)

  1. Dispositif (1) servant à la transformation d'un mouvement d'avance mécanique en un signal électrique (12) pour la commande d'une machine-outil à entraînement électrique ou un autre appareil électrique, comprenant :
    - un boîtier (3) dans lequel il est pratiqué au moins un évidement (4),
    - un élément d'actionnement (5) logé et guidé axialement dans l'évidement (4) du boîtier (3),
    - une rondelle à déclic (9) retenue avec prétension dans le boîtier (3) et qui, en état non activé, est bombée en direction de l'élément d'actionnement (5) et
    - un circuit imprimé (10) disposé dans le boîtier (3), sur lequel il est prévu au moins un contact de commande électrique (11) donnant en direction de la rondelle à déclic (9) et qui est arrangé en alignement précis avec celle-ci,
    caractérisé en ce que
    sur l'élément d'actionnement (5), il est monté au moins un élément piézoélectrique (21), que le déclic de la rondelle à déclic (9) est saisi par l'élément piézoélectrique (21), et que l'élément piézoélectrique (21) produit une impulsion (22) sortie sur une unité d'évaluation et de commande (13) qui assure simultanément la mesure du signal de commande électrique (12) de la rondelle à déclic (9) et son évaluation en vue de la production d'un signal de commande électrique (12).
  2. Dispositif (1) d'après la revendication 1,
    caractérisé en ce que
    l'élément piézoélectrique (21) est conçu de sorte qu'au déclic de la rondelle à déclic (9), il est saisi la réduction de la force d'avance (2).
    à ce que la force d'avance (2) est réduite au
  3. Dispositif (1) d'après les revendications 1 ou 2,
    caractérisé en ce que
    la course de déclic de la rondelle à déclic (9) depuis sa position de départ à sa position de commande est dimensionnée de sorte à ce que la rondelle à déclic (9) effectue le déclic à l'atteinte de la position de commande.
  4. Dispositif (1) d'après une des revendications 1 à 3,
    caractérisé en ce que
    l'élément piézoélectrique (21) a une forme annulaire ou est conçu en parallélépipède.
  5. Dispositif (1) d'après une des revendications précédentes,
    caractérisé en ce que
    l'élément piézoélectrique (21) est disposé sur l'élément d'actionnement (5).
  6. Dispositif (1) d'après une des revendications précédentes,
    caractérisé en ce que
    l'élément d'actionnement (5) consiste en un poussoir d'actionnement (6) et une membrane sphérique (8) retenues respectivement avec mobilité axiale dans le le boîtier (3).
  7. Dispositif (1) d'après la revendication 6,
    caractérisé en ce que,
    en état non activé, le poussoir d'actionnement (6) porte directement sur la surface de la membrane sphérique (8).
EP16168708.2A 2016-05-09 2016-05-09 Dispositif de conversion de mouvements mecaniques en signal de commutation electrique Active EP3244430B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16168708.2A EP3244430B1 (fr) 2016-05-09 2016-05-09 Dispositif de conversion de mouvements mecaniques en signal de commutation electrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16168708.2A EP3244430B1 (fr) 2016-05-09 2016-05-09 Dispositif de conversion de mouvements mecaniques en signal de commutation electrique

Publications (2)

Publication Number Publication Date
EP3244430A1 EP3244430A1 (fr) 2017-11-15
EP3244430B1 true EP3244430B1 (fr) 2018-08-29

Family

ID=56014811

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16168708.2A Active EP3244430B1 (fr) 2016-05-09 2016-05-09 Dispositif de conversion de mouvements mecaniques en signal de commutation electrique

Country Status (1)

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EP (1) EP3244430B1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2052763A1 (de) * 1970-10-28 1972-05-04 Schmersal & Co K A Elektrische Schaltvorrichtung zur Umwandlung der Position eines mechanischen Gebers in ein elektrisches Signal, insbesondere Endschalter
DE102005037613A1 (de) * 2005-08-05 2007-02-08 Rafi Gmbh & Co. Kg Mikroschalter
EP2645391B1 (fr) * 2012-03-27 2016-10-12 RAFI GmbH & Co. KG Dispositif de commutation et contacteur de commutation
DE102013019151A1 (de) * 2013-11-14 2015-05-21 Euchner Gmbh + Co. Kg Vorrichtung zum lösbaren Arretieren und Signalisieren eines vorgebbaren Zustandes einer Schutzeinrichtung einer Maschine oder dergleichen, insbesondere Sicherheitsschalter

Also Published As

Publication number Publication date
EP3244430A1 (fr) 2017-11-15

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