EP2845520B1 - Dispositif de commande d'actionnement de meuble - Google Patents

Dispositif de commande d'actionnement de meuble Download PDF

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Publication number
EP2845520B1
EP2845520B1 EP14179649.0A EP14179649A EP2845520B1 EP 2845520 B1 EP2845520 B1 EP 2845520B1 EP 14179649 A EP14179649 A EP 14179649A EP 2845520 B1 EP2845520 B1 EP 2845520B1
Authority
EP
European Patent Office
Prior art keywords
sliding portion
blocking
locking pawl
housing
blocking slider
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
EP14179649.0A
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German (de)
English (en)
Other versions
EP2845520A1 (fr
Inventor
Andreas Oberndörfer
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.)
Dewertokin GmbH
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Dewertokin GmbH
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Filing date
Publication date
Application filed by Dewertokin GmbH filed Critical Dewertokin GmbH
Publication of EP2845520A1 publication Critical patent/EP2845520A1/fr
Application granted granted Critical
Publication of EP2845520B1 publication Critical patent/EP2845520B1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C20/00—Head -, foot -, or like rests for beds, sofas or the like
    • A47C20/04—Head -, foot -, or like rests for beds, sofas or the like with adjustable inclination
    • A47C20/042—Head -, foot -, or like rests for beds, sofas or the like with adjustable inclination by means of screw-and-nut mechanism
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C20/00—Head -, foot -, or like rests for beds, sofas or the like
    • A47C20/04—Head -, foot -, or like rests for beds, sofas or the like with adjustable inclination
    • A47C20/041—Head -, foot -, or like rests for beds, sofas or the like with adjustable inclination by electric motors

Definitions

  • the invention relates to a device for controlling an electromotive linear drive designed as a furniture drive for adjusting movably mounted parts of reclining and seating furniture, in particular for the care sector, for example for hospital beds.
  • Such a device has at least one accommodated in a housing drive train, which consists of an electric motor, a downstream of this reduction gear and a drivable by this threaded spindle for displacement of a lifting element for lifting and lowering the respective movable furniture part.
  • a housing drive train which consists of an electric motor, a downstream of this reduction gear and a drivable by this threaded spindle for displacement of a lifting element for lifting and lowering the respective movable furniture part.
  • the inventive device comprises a provided in the drive train switchable dog clutch, which is held by a spring mechanism in engagement, equipped with a switching element switching mechanism for opening and closing the dog clutch and a separately actuable locking mechanism with which the dog clutch, for example in the event of emergency lowering , is lockable in its open position.
  • a switching mechanism has already been proposed ( DE 10 2012 211 508.0 ), with the engagement and disengagement is suddenly realized.
  • the intermediate positions of the switch are quickly traversed by the influence of prestressed spring elements, so that the engagement and disengagement takes place very briefly and thereby a longer while over-grinding of the coupling halves is avoided.
  • the invention is therefore an object of the invention to provide a solution that the jaw clutch is closed again after a Notabsenkung the furniture parts and the linear drive is prepared for a renewed lifting of the respective furniture part.
  • the construction of the device according to the invention can be designed in detail so that the pawl is biased by a spring in the direction of its blocking position, in which it can be latched behind the latching element of the blocking slide. As a result, the pawl automatically reaches its blocking position upon movement of the blocking slide into the open position of the dog clutch.
  • the sliding piece is expediently displaceably guided parallel to the blocking slide and can have a projecting catch which releases the pawl when the sliding piece moves in the direction of the front end of the blocking slide connected to the dog clutch, so that the blocking slide, which is spring-loaded, can move in the direction of the closed position of the dog clutch.
  • the blocking slide is preferably displaceable against the force of the mentioned tension spring via a Bowden cable in the direction of the open position of the dog clutch.
  • the blocking slide can be displaceably guided relative to the housing in the axial direction of the threaded spindle.
  • a particularly useful construction is that provided on the blocking slide locking element is designed as a protruding latching lug, with which the pawl can be operated in a very simple manner.
  • the pawl which can be latched behind the latching element or the latching lug of the blocking slide, is expediently mounted pivotably on the housing.
  • the sliding piece can be guided displaceably parallel to the blocking slide, whereby a very simple and slim design is possible.
  • FIG. 1 The drawing shows an overall view of an electromotive linear drive in the form of a double drive 1 is shown. The essential parts of the drive are enclosed by a housing 2.
  • the in Fig. 1 shown double drive is for example provided for a hospital bed, wherein the shaft 3 with the support legs 5, the head part raises and lowers, while the shaft 4 is provided with the support legs 6 for actuating the foot part.
  • the emergency switching device serves to quickly and safely lower the head part by means of the shaft 3 and the support legs 5 with the clutch open by its own gravity.
  • Fig. 2 are all housing parts 2, 7 and 8 omitted, so that provided for the head part left drive train with all its individual parts is visible.
  • the drive train provided for the head part consists of an electric motor 7, a reduction gear downstream of the latter in the form of a worm gear 10 and a threaded spindle 11 drivable by the latter for displacing a lifting element 12.
  • the lifting element 12 actuates a pressure lever 13 attached to the shaft 3 so that at an axial displacement of the lifting element 12, the shaft 3 is rotated.
  • the head part is raised or lowered by the pivoting movement of the shaft 3.
  • a dog clutch 14 is provided between the worm gear 10 and the threaded spindle 11, which can be opened and closed by means of a shift fork 15.
  • the switching process takes place in normal operation via a in the Switch housing 7 mounted switch 16, as he, for example, in the earlier patent application DE 10 2012 211 508.0 is described.
  • a separately actuable locking mechanism 17 is provided with which the jaw clutch 14 is reliably locked in its open position. This precaution should serve to reliably keep the claws provided on the two coupling halves separate during emergency lowering, so that they are not damaged.
  • the blocking mechanism 17 has a blocking slide 18, which is displaceably guided relative to the housing 2 in the longitudinal direction of the threaded spindle 11.
  • the blocking slide 18 engages in a coming from the switch 16 and connected to the shift fork 15 slide valve 19 a.
  • the blocking slide 18 is spring-loaded in the direction of the closed position of the coupling, by means of a tension spring 20, which is fastened on the one hand to the blocking slide 18 and on the other hand to the housing 2.
  • the blocking slide 18 is displaceable with a separate actuating mechanism 21 against the spring load by the tension spring 20 in the direction of the open position of the dog clutch 14.
  • actuating mechanism 21 two Bowden cables 22 are provided in the embodiment shown in the drawing, which can be guided to easily accessible locations on both sides of the hospital bed and operated from there.
  • a laterally projecting detent 23 is provided, which cooperates with a pawl 24 pivotally mounted on the housing 2.
  • the shift fork 15 is actuated such that the dog clutch 14 assumes its open position.
  • the pawl 24 snaps into the in Fig. 3 shown position, in which it engages behind the detent 23 of the locking slide 18 so that it is prevented from moving in the drawing to the right in a position in which the dog clutch 14 is closed.
  • To the overall mechanism further includes a relative to the housing 2 movable sliding piece 25, with which the pawl 24 in the lowered state of the corresponding furniture part of the latch 23 is releasable to release the blocking slide 18 so that it can move back to the right in the drawing to close the dog clutch 14.
  • the sliding piece 25 is guided parallel to the blocking slide 18 and has a projecting driver 26, which in a movement of the sliding piece (25) in the drawing to the right, ie towards the front end of the blocking slide 18 connected to the dog clutch 14, against the pawl 24 presses. This is thereby pivoted against a tension applied by a tension spring 27 clockwise and thereby separated from the locking lug 23 of the blocking slide 18, so that the blocking slide 18 is moved by the spring load of the tension spring 20 to the right and the dog clutch is closed again.
  • the movement of the sliding piece 25 can be achieved in various ways. It is only important that the sliding piece 25, if the corresponding furniture part completely has been lowered, then moved in the drawing to the right to actuate the pawl 24 and the jaw clutch 14 to close, so that the drive train is ready for use again and the corresponding furniture part can be raised again via the motor 7.
  • an actuating lever 28 is rotatably mounted on the shaft 3, which, when the support legs 5 assume their pivoted down position, the sliding piece 25 actuate.
  • the end of the sliding piece 25 protrudes laterally out of the housing 2 and is moved to the right when completely lowering the support legs 5 in the drawing so that the driver 26 releases the pawl 24 from its in Fig. 3 illustrated blocking position in which it is behind the locking lug 23 of the blocking slide 18, in the in Fig. 2 shown inactive position is pivoted.
  • the blocking slide 18 moves by means of the tension spring 20 to the right, whereby the jaw clutch 14 can again assume their closed position.
  • the pawl 24 can be actuated by means of a separate Bowden cable.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Transmission Devices (AREA)
  • Invalid Beds And Related Equipment (AREA)
  • Mechanical Operated Clutches (AREA)

Claims (14)

  1. Dispositif de commande d'un mécanisme de commande linéaire électromotrice en forme de mécanisme d'actionnement de meuble pour ajuster des parties logées de manière mobile de lits et de sièges,
    - comprenant au moins une chaîne cinématique disposée dans une boîte (2) et se composant d'un moteur électrique (9), d'un réducteur de vitesse en aval de celui-ci et d'une broche filetée susceptible d'être commandée par ledit réducteur et destinée à déplacer un élément de levage (12) pour monter et baisser la partie de meuble mobile respective,
    - un crabotage embrayable (14) qui est prévu dans la chaîne cinématique et qui est maintenu en engrènement par un mécanisme à ressort,
    - un mécanisme de commande muni d'un élément de commande pour ouvrir et fermer le crabotage (14) ainsi
    - qu'un mécanisme de blocage à actuation séparée (17) au moyen duquel ledit crabotage (14) peut être arrêté à sa position ouverte,
    caractérisé en ce
    - que le mécanisme de blocage (17) comporte un coulisseau de blocage (18) qui est guidé de manière coulissante par rapport à la boîte (2) et est relié avec l'élément de commande directement ou indirectement et est chargé par ressort vers la position fermée de l'élément de commande,
    - que le coulisseau à blocage (18) est déplaçable contre la charge par ressort vers la position ouverte du crabotage (14) au moyen d'un mécanisme d'actionnement particulier (21),
    - qu'un élément d'arrêt est prévu sur le coulisseau de blocage (18),
    - qu'un cliquet d'arrêt (24) est fixé de manière mobile sur la boîte (2) et peut s'encliqueter derrière l'élément d'arrêt du coulisseau de blocage (18) lorsque celui-ci est arrivé à sa position qui correspond à la position ouverte du crabotage (14) et
    - qu'est prévue une pièce coulissante (25) mobile par rapport à la boîte (2) au moyen de laquelle le cliquet d'arrêt (24) peut être détaché de l'élément d'arrêt dans l'état baissé de la pièce de meuble correspondante.
  2. Dispositif selon la revendication 1, caractérisé en ce que le cliquet d'arrêt (24) est précontraint par un ressort de traction (22) vers sa position de blocage à laquelle il peut s'encliqueter derrière l'élément d'arrêt du coulisseau de blocage (18).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la pièce coulissante (25) est guidée de manière mobile parallèlement au coulisseau à blocage (18) et comporte un entraîneur saillant (26) qui déclenche le cliquet d'arrêt (24) lors d'un mouvement de la pièce coulissante (25) vers l'extrémité du coulisseau de blocage (18) reliée avec le crabotage (14).
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que le coulisseau de blocage (18) est déplaçable contre la force d'un ressort de traction (20) vers la position ouverte du crabotage (14) par au moins un cable Bowden (22).
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que le coulisseau de blocage (18) est guidé de manière mobile dans la direction axiale de la broche filetée (11) par rapport à la boîte (2).
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que l'élément d'arrêt prévu sur le coulisseau de blocage (18) est construit comme ergot d'encliquetage (23).
  7. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que le cliquet d'arrêt (24) qui peut s'encliqueter derrière l'élément d'arrêt du coulisseau de blocage, est fixé de manière pivotante sur la boîte (2).
  8. Dispositif selon l'une des revendications 1 à 7, caractérisé en ce que la pièce coulissante (25) est guidée de manière mobile par rapport au coulisseau de blocage (18).
  9. Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que, pour dégager le cliquet d'arrêt (24), la pièce coulissante (25) peut être commandée à la main.
  10. Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que, pour dégager le cliquet d'arrêt (24), la pièce coulissante (25) peut être commandée par un cable Bowden particulier.
  11. Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que, pour dégager le cliquet d'arrêt (24), la pièce coulissante (25) peut être commandée par un levier de commande (28).
  12. Dispositif selon la revendication 11, caractérisé en ce que le levier de commande (28) est disposé de manière fixe sur l'arbre (3) de la partie de meuble respective et se tourne conjointement avec celui-ci, et que le levier de commande (28) est ajusté de sorte que dans l'état baissé de la partie de meuble respective la pièce coulissante (25) est déplacée de sorte que le cliquet d'arrêt (24) est dégagé de l'ergot d'encliquetage (23) et le crabotage (14) retourne à sa position fermée.
  13. Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que, pour dégager le cliquet d'arrêt (24), la pièce coulissante (25) peut être actionnée par une broche de contact pressée vers le bas lorsque la partie de meuble mobile respective se trouve à sa position baissée.
  14. Dispositif selon la revendication 13, caractérisé en ce que la broche de contact est reliée avec la pièce coulissante (25) par une chaîne de levier et actionne ladite pièce coulissante lorsque ladite broche de contact est pressée.
EP14179649.0A 2013-09-09 2014-08-04 Dispositif de commande d'actionnement de meuble Active EP2845520B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013217920.0A DE102013217920A1 (de) 2013-09-09 2013-09-09 Vorrichtung zur Steuerung eines Möbelantriebs

Publications (2)

Publication Number Publication Date
EP2845520A1 EP2845520A1 (fr) 2015-03-11
EP2845520B1 true EP2845520B1 (fr) 2015-12-02

Family

ID=51265566

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14179649.0A Active EP2845520B1 (fr) 2013-09-09 2014-08-04 Dispositif de commande d'actionnement de meuble

Country Status (3)

Country Link
EP (1) EP2845520B1 (fr)
JP (1) JP5955359B2 (fr)
DE (1) DE102013217920A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2903048T3 (es) * 2016-04-29 2022-03-30 De Werth Group Ag Doble accionamiento electromotor

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4174547A (en) * 1978-02-08 1979-11-20 Wetzler Justin J Hospital bed structure
JPH0541533U (ja) * 1991-11-12 1993-06-08 パラマウントベツド株式会社 緊急解除手段を有する床部起伏機構
DE29604293U1 (de) * 1996-03-08 1997-07-03 Dewert Antriebs Systemtech Elektromotorischer Möbelantrieb
DE10200169A1 (de) * 2002-01-04 2003-07-17 Cimosys Ag Goldingen Möbelantrieb zum Verstellen von Teilen eines Möbels relativ zueinander
DE20214426U1 (de) * 2002-09-17 2004-02-19 Cimosys Ag Elektromotorischer Möbelantrieb zum Verstellen von Teilen eines Möbels relativ zueinander
DE102004006368A1 (de) * 2004-02-09 2005-08-25 Ludwig Ehrhardt Gmbh Lineareinheit
DE202005020266U1 (de) 2005-12-23 2007-04-26 Dewert Antriebs- Und Systemtechnik Gmbh Elektromotorischer Linearantrieb
JP5414461B2 (ja) * 2009-10-30 2014-02-12 株式会社ミツバ リニアアクチュエータ
DE202011110086U1 (de) * 2011-11-09 2012-12-18 Dewertokin Gmbh Elektromotorischer Linearantrieb, insbesondere zum Verstellen von Liege- und Sitzmöbeln
DE102012219113A1 (de) * 2011-11-09 2013-05-16 Dewertokin Gmbh Elektromotorischer Linearantrieb, insbesondere zum Verstellen von Liege- und Sitzmöbeln
DE102012211508A1 (de) * 2012-07-03 2014-01-09 Dewertokin Gmbh Vorrichtung zur Steuerung eines Möbelantriebs

Also Published As

Publication number Publication date
EP2845520A1 (fr) 2015-03-11
DE102013217920A1 (de) 2015-03-12
JP2015091297A (ja) 2015-05-14
JP5955359B2 (ja) 2016-07-20

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